CN104108281A - Castor with brake - Google Patents

Abstract

A castor with a brake comprises a wheel (1), a fork portion (5) holding the wheel, a castor installing plate (7) holding the fork portion and the brake (8). The brake is a single component brake device with an installation part (9), a friction part (10) and an operation part (11). The installation part of the brake is installed on an installation ring (15) through an installation shaft (14). When the brake is at a release position where the brake is in a state of not pressing the shoulder (12) of a tire, the brake is stably held at the release position by means of the elastic force of the fork portion. The brake is made to move from the release position to a stop position by pressing the operation part. Before and after a boundary position between the release position and the stop position, the direction of a rotating force generated by a counterforce of the shoulder of the tire is reversed. At the stop position, the friction part presses the shoulder of the tire and prevents the rotation of the wheel. The brake can be held at the stop position by means of the counterforce of the shoulder. The castor with the brake is low in cost and is firm.

Description

The castor of band brake

Technical field

The present invention relates to a kind of castor of band brake, relate in particular to a kind of castor simple in structure and drg that can lock reliably that is provided with.

Background technology

In the past, on the castor of traveling bag etc., equipped drg, thereby it can not be moved in the time being placed on floor.The drg of castor has: suppress the wheel of castor and stop the rotary locking type drg of its rotation and lift the liftable drg of the wheel of castor by ground engaging component.Lifting drg is to drive ground engaging component by control lever etc., and the operations such as the tiptoe of pin of described control lever, wheel is lifted from floor, thereby fitment etc. can not move it.Rotary locking type drg is generally pushed down side or the wheel face of wheel with brake scotch, or makes hook-like assembly unit be limited to the concavo-convex of wheel rim, thereby the rotation of wheel is stopped.For example, put down the control lever of the fork of being located at castor, retaining pawl embeds the recess of the wheel rim of wheel, thereby stops the rotation of wheel.

Brake scotch, hook-like assembly unit, in the drg of direct control form, are that the pedal by be located at castor with pin operation drives.In the drg of far-end operation form, be that operation is positioned at handle on hand away from castor wheel, by what drive via the functional component of cable etc.Pedal has by tiptoe mentions the single type pedal putting down, the double head type pedal that lever ground operates and the doublet type pedal that passes through two pedal operations etc.By in the drg of single type pedal operation, by locking and the releasing of a pedal operation rotation of wheel.In the time that the drg that has locked rotation of wheel is removed, carry out the operation of lifting with toe or tiptoe.Below, there are several examples of associated conventional art therewith.

Patent documentation 1 disclosed " brake equipment of castor for travelling scaffold " is a kind of brake equipment that can obtain strong braking force.As shown in Fig. 9 (a), in the lower end of the longitudinal axis 101 that can insert scaffold tube, be fixed with the circular mounting plate 102 of castor.In the fork 104 of wheel 103 that supports castor, support 105 is installed.The breach of the both sides of slipper 106 engages with support 105.On the horizontal shaft 107 that is supported in support 105, be provided with brake shoe expander 108.Slipper 106 is pressed in wheel side by brake shoe expander 108.Be provided with arc sections 109 on the top of slipper 106.Arc sections 109 is in the time of brake operating and the periphery butt of circular mounting plate 102.The lower inside of slipper 106 is provided with wedge-shaped projection 110.Wedge-shaped projection 110 is pushed down wheel 103 in the time of brake operating.The acute angle part of wedge-shaped projection 110 towards contrary with the hand of rotation of wheel.

Patent documentation 2 disclosed " castor stop mechanism " is a kind ofly only to trample the castor stop mechanism that just can switch braking mode by pin, and can to application adjust the braking force of drg.It has as shown in Figure 9 (b): the braking being made up of tabular body drives with pedal 201, braking and discharges and use pedal 202 and spring body 203.Braking drives with the cardinal extremity of pedal 201 and rotates and supported by axle freely.Upper surface at this pedal is formed with depression.There is brake scotch 204 at its back side, and relative with wheel.Braking discharges with having rotation lobe plate 205 freely on pedal 202.The periphery of lobe plate 205 drives the vertically butt of surface with pedal 201 with braking.Spring body 203 is to making braking drive the direction application of force rising on the top with pedal 201.Drive on the bearing surface with pedal tabular body and be formed with successively in the braking of lobe plate 205: jut 206, the 1st profile portion the 207, the 2nd profile portion the 208, the 3rd profile portion 209.Jut 206 drives by the depression of pedal 201 suitably chimeric with drg.The 1st profile portion 207 is held in state freely by braking driving with pedal 201.The 2nd profile portion 208 is held in drg the state that makes it produce predetermined brake power and work.The 3rd profile portion 209 is held in drg the state that makes it slowly improve braking force and work.

Patent documentation 3 disclosed " castor " is the castor that a kind of yoke portion 301 could rotate and have stop motion mechnism 302.It is as shown in Fig. 9 (c), and yoke portion 301 has: bearing supporting station, hill holder supporting station 303 and wheel support plate 304.Hill holder supporting station 303 is outstanding from the outer wall on even keel of bearing supporting station.Wheel support plate 304 carries out axle supporting to wheel.In bearing in the bearing supporting station that is disposed at yoke portion 301, insert and be fixed with the top of the S. A. of the protrusion that connects base station 305.Yoke portion 301 rotates freely and is supported by axle with respect to base station 305.Stop motion mechnism 302 has: leaf spring 306 and control lever 307.One end of leaf spring 306 is limited to framework 308, is fixed with brake scotch 309 on the other end.Control lever 307 can be supported by framework 308 axles rotatably, and press to wheel one end of leaf spring 306.The framework of stop motion mechnism 302 308 is loaded to the top in supporting station.Bolster 310 connects sidewall and the wheel support plate 304 of framework 308 simultaneously.This stop motion mechnism 302 is installed on to yoke portion 301.

Patent documentation 4 disclosed " castor " is a kind of castor body and brake equipment, the castor that just can assemble easily by embedding operation only manufactured respectively.It is as shown in Fig. 9 (d), and the brake equipment of castor is made up of frame 401, tread portion 402 and slipper 403.Frame 401 has and is fixed on the supporting lateral plate 405 of yoke and the support 404 of pair of right and left, is formed with the acceptance division of concavity on the internal face of support 404.On the bottom surface of tread portion 402, there is cam face.The axle sheet portion 407 of tread portion 402 is supported by the acceptance division axle of support 404.Slipper 403 is limited to frame 401, and tread portion 402 is kept.Slipper 403 is removed the direction application of force to braking.If tread portion 402 is moved to the braking direction camming surface that tilts, overcome the application of force and detent 406 is pressed on to the tire surface of wheel.

Patent documentation 5 disclosed " brake equipment of handcart for transportation " is a kind of simple in structure, the brake equipment that can brake wheel reliably.As shown in Fig. 9 (e), the first pedal 502 and arm part 503 is installed on dwang 501.Dwang 501 is provided with the lower surface rear support of the loading platform 505 of fixing vehicle wheel 504.At the outstanding distolateral brake scotch 506 that arranges of arm part 503.On the first pedal 502, be provided with the connecting pin 507 along dwang 501.Upper and lower a pair of forniciform engaging edge 509 is set on the second pedal 508.Engaging edge 509 is set on the locus circle of the connecting pin 507 centered by dwang 501.The engaging in the time that all sides of connecting pin 507 and the fixing vehicle wheel 504 of brake scotch 506 contact of engaging edge 509, separates when separation.The second pedal 508 is adjacent with the first pedal 502, and rotation is located on loading platform 505 freely.Between first, second pedal and loading platform 505, be inserted with spring 510, described spring 510 application of forces make pedal tip side rotate to upside engaging edge direction from downside engaging edge.

Patent documentation 6 disclosed " castor " is a kind of castor that can directly confirm according to outward appearance the wearing and tearing of tire portion.Can be used in the adjustment period that judges braking force.It is as shown in Fig. 9 (f), and wheel 602 rotates the bottom that is supported on freely the fork 603 of castor 601 by axle.Wheel 602 is provided with tire portion 605 at the peripheral part of rim 604.Thereby the peripheral part that brake component is pressed on tire portion 605 by brake equipment is braked.In the inside of the tire portion 605 of wheel, be embedded with mark component 606, described mark component 606 is colored as the color different from tire portion 605.While wearing and tearing the peripheral part of tire portion 605 due to the use of castor 601, a part for mark component 606 is exposed to the periphery of tire portion 605.

Patent documentation 7 disclosed " travelling scaffold device castor " is a kind of the have good stability of strong braking force, rotation, safe castor.Its as shown in Fig. 9 (g), by the wheel rim portion 701 of castor 705 with and the wheel 703 that forms of the tire portion 702 of peripheral part by axletree 704 remain on coaxial on.Wheel 703 is two-wheel, can rotate independently of one another.Yoke portion 706 is provided with the slipper 708 being bent to form by support 707.The bottom of slipper 708 is formed with bottom hooking sheet 709, the outer peripheral face butt of described bottom hooking sheet 709 and wheel 703.On bottom hooking sheet 709, there is the chimeric recess 710 of using of the tire portion 702 that embeds wheel 703, itself and two-wheel butt simultaneously.

Patent documentation 8 disclosed " castor of band brake " is by a kind of simple in structure, light weight, drg stops the rotation of the tire of castor cheaply.It rotates the wheel 801 being made up of tire 802 and wheel hub 803 freely and keeps by axletree 805 by fork 804 as shown in Fig. 9 (h).The castor adapter plate 806 that can maintain rotatably fork 804 by bearing and S. A. is installed on to traveling bag etc.Drg 807 on even keels of the elastic resin parts of elongated U word shape are installed on the left and right arms part of fork tire directly over.As long as inoperation, drg 807 will return to stable horizontality, so can carefully hinder the rotation of wheel.If the operating portion on the top of operational brake, enters between the arm part and tire 802 of fork 804 the central friction part 808 of drg 807, stop the rotation of wheel by the friction force of extruding tire.

Prior art document

Patent documentation 1: Japanese Patent Publication 07-038420 communique (No. 2590983rd, practical login)

Patent documentation 2: Japanese kokai publication hei 08-132813 communique (No. 2831284th, patent)

Patent documentation 3: Japanese kokai publication hei 11-091306 communique (No. 3159668th, patent)

Patent documentation 4: Japanese kokai publication hei 11-123905 communique (No. 3113846th, patent)

Patent documentation 5: TOHKEMY 2006-111118 communique (No. 4266910th, patent)

Patent documentation 6: TOHKEMY 2008-290628 communique

Patent documentation 7: TOHKEMY 2012-127132 communique

Patent documentation 8: TOHKEMY 2012-158255 communique

Invent problem to be solved

But the castor of band brake in the past has following problems.Because complex structure, component count are many, thus be difficult to assembling, Expenses Cost, and easily produce fault.Drg simple in structure can not lock reliably.

Summary of the invention

The object of the invention is to solve above-mentioned problem in the past, realize the castor of low cost and firm band brake.

For solving the means of problem

In order to solve above-mentioned problem, the present invention has one: the wheel being made up of elastic tire and wheel hub, fork, described fork is remained wheel can rotate by axletree, castor adapter plate, described castor adapter plate is remained fork can rotate by bearing, and stop the castor of band brake of the drg of the rotation of wheel to be configured to, and drg is the brake equipment of single hard part, this brake equipment has: be installed on the installation portion on the arm part of fork, between the arm part of fork and tire and press the friction part of the shoulder of tire, and operating portion, thereby described operating portion stops the either party's of the stop position rotating position to be moved to the opposing party's position for the shoulder that makes drg press described tire in not pressing releasing position and the friction part of state of shoulder of described tire from friction part, in releasing position, utilize fork inclined-plane, central portion rear end elasticity and keep stable, at stop position, utilize tire shoulder antagonistic force and be stably held in halted state, the front and back of the boundary position between releasing position and stop position, the direction reversion of the rotational force that the antagonistic force of the shoulder of tire produces.

Invention effect

By structure as described above, can realize the castor of low cost and firm band brake.

Brief description of the drawings

Fig. 1 is the concept map of the castor of the band brake in embodiments of the invention.

Fig. 2 is front view and the back view of the castor of the band brake in embodiments of the invention.

Fig. 3 is the lateral plan of the castor of the band brake in embodiments of the invention.

Fig. 4 is the exploded perspective view of the castor of the band brake in embodiments of the invention.

Fig. 5 is the detailed view of the drg of the foot wheel in embodiments of the invention.

Fig. 6 is the constitution diagram of the castor of the band brake in embodiments of the invention.

Fig. 7 is the action specification figure of the castor of the band brake in embodiments of the invention.

Fig. 8 is the variation of the castor of the band brake in embodiments of the invention.

Fig. 9 is the concept map of the castor of band brake in the past.

Nomenclature

1 wheel

2 tires

3 wheel hubs

4 axletrees

5 forks

6 bearings

7 castor adapter plates

8 drgs

9 installation portions

10 friction parts

11 operating portions

12 shoulders

13 S. A.s

14 installation shaft

15 installation rings

Detailed description of the invention

Below, with reference to Fig. 1～Fig. 8, at length to describing for the mode of implementing the best of the present invention.

Embodiment

Embodiments of the invention are castors of a kind of band brake with drg, wheel, fork and castor adapter plate, described drg is the front and back rotational force reversion of the boundary position between releasing position and stop position, is stably held in the single part of halted state at stop position by the antagonistic force of tire shoulder.

Fig. 1 is the concept map representing with the castor of drg.Fig. 2 represents front view and back view.Fig. 3 represents lateral plan.Fig. 4 represents exploded perspective view.Fig. 5 represents the details drawing of drg.Fig. 6 represents constitution diagram.Fig. 7 represents action specification figure.Fig. 8 represents variation.In Fig. 1～Fig. 8, wheel 1 is the ground connection turning unit being made up of tire and wheel hub.Tire 2 is resilient tires of urethane resin system etc.Wheel hub 3 is the plastic bearing wheel rims of holding concurrently.Axletree 4 is to be the parts that can rotate by wheel support.Fork 5 is the parts that wheel kept by axletree.Bearing 6 is bearings that S. A. is supported.Castor adapter plate 7 remains fork can rotate, for being installed on the substrate of bag.

Drg 8 is the resinous brake components that stop rotation of wheel.Installation portion 9 is cylindrical portion, and described cylindrical portion is for being installed on drg the arm part of fork by installation shaft.Thereby the part of braking that rubs that friction part 10 is the shoulders by pressing tire.Operating portion 11 is the parts of pressing with hand or tiptoe in order to brake.Shoulder 12 is the side of tire and the boundary member of tire surface.S. A. 13 is rotary middle spindles of fork.Installation shaft 14 is installed on drg on the axle of fork.The annulus that installation ring 15 keeps installation shaft on the arm part of fork.

Function and the action of the castor to the band brake in the embodiments of the invention of said structure describe.First,, with reference to Fig. 1, the summary of the castor to band brake describes.Fig. 1 (a) is the lateral plan that represents release position.Fig. 1 (b) is the block diagram that represents release position.Fig. 1 (c) is the block diagram that represents halted state.Fig. 1 (d) is the cutaway view that represents release position.Fig. 1 (e) is the cutaway view that represents halted state.The castor of this band brake has: the wheel 1 being made up of elastic tire 2 and wheel hub 3; Fork 5, described fork 5 can keep wheel 1 rotatably by axletree 4; Castor adapter plate 7, described castor adapter plate 7 can keep fork 5 rotationally by bearing 6; And the drg 8 that stops wheel 1 to rotate.

Drg 8 is made up of single hard part.Make installation shaft 14 by arm part and the installation portion 9 of the left and right of fork 5, thereby drg 8 is installed in fork 5.In the releasing position of the state not according to pinch roller tire 2 shoulders 12, the top ends of installation portion 9 is flexiblely pressed against on the inclined-plane, central portion rear end of fork 5, thereby is subject to the rotational force to release direction, and the state that therefore leaves tire 2 with friction part 10 keeps stable.Now, the projection of drg 8 is encountered the trailing edge of the central portion of fork 5, thereby can exceedingly not rotate to release direction.

In the situation that braking, press the operating portion 11 that is positioned at rear end from direct of travel, it is moved to stop position from releasing position.If friction part 10 is encountered the shoulder 12 of tire 2, due to the antagonistic force of shoulder 12, can produce the rotational force that drg 8 will be rotated to release direction.In the time of boundary position by between releasing position and stop position, the direction reversion of rotational force.At stop position, by the friction part 10 between arm part and tire 2 in fork 5, the shoulder 12 of tire 2 is pressed, thus the rotation of prevention tire 2.In halted state, due to the antagonistic force of the shoulder 12 of tire 2, keep stable at stop position.

Then,, with reference to Fig. 2～Fig. 5, the detailed structure of the castor to band brake describes.Fig. 2 (a) represents front view.The figure that sees castor from the direct of travel front of castor.Fig. 2 (b) is the back view that represents release position.Fig. 2 (c) is the back view that represents halted state.The figure that sees castor from the reversing sense of the direct of travel of castor.Fig. 3 (a) is the lateral plan that represents release position.Fig. 3 (b) is the lateral plan that represents halted state.Structure beyond drg was with well-known castor was roughly the same in the past.Wheel 1 is made up of elastic tire 2 and wheel hub 3.Fork 5 can keep wheel 1 rotatably by axletree 4.Castor adapter plate 7 can keep fork 5 rotationally by bearing 6.

Fig. 4 (a) and (b), (c) are the exploded perspective views that represents release position.Fig. 4 (d), (e), (f) are the exploded perspective views that represents halted state.Fig. 4 (g) is the exploded perspective view that represents to be decomposed into main portion.Fig. 4 (a), (d) are the figure that removes castor adapter plate 7.Fig. 4 (b), (e) are the figure that further removes bearing 6.Fig. 4 (c), (f) are the figure that further removes fork 5.Fig. 5 (a), (b) are the block diagrams that represents drg.Fig. 5 (c), (d) are front view and the back views that represents drg.Fig. 5 (e), (f), (g) are birds-eye view, lateral plan and the upward views that represents drg.

Drg 8 is formed by the single hard part that stops wheel 1 to rotate.For example,, with rigid plastic, metal manufacture.Installation portion 9 is arranged on the installation ring 15 of left and right arms part of fork 5 by installation shaft 14.Using installation shaft 14 as centre of gration, from release position to halted state, rotate about 60 ° of left and right.On the operating portion 11 of drg 8, has anti-skidding portion, so that tiptoe or hand easily operate.

Near installation portion 9, there is the friction part 10 of the shoulder 12 of pressing tire 2.Projection is encountered the trailing edge of the central portion of fork 5, thereby restriction is to the excessive rotation of release direction.Under halted state, the downside of operating portion 11 is encountered tire 2, thereby restriction is to stopping the excessive rotation of direction, keeps stable in appropriate position.

Next,, with reference to Fig. 6, the function of the castor to band brake describes.Fig. 6 (a) is the block diagram that represents release position.Fig. 6 (b) is the lateral plan that represents release position.On releasing position, the state of friction part 10 in the shoulder 12 not according to pinch roller tire 2.Operating portion 11 is for from releasing position to stop position, or its opposite sense moves.On releasing position, utilize the elasticity on the inclined-plane, central portion rear end of fork 5, give the weak rotational force to release direction, projection keeps stable after encountering the trailing edge of central portion of fork 5.The front and back of the boundary position between releasing position and stop position, the direction reversion of the rotational force that the antagonistic force of the shoulder 12 of tire 2 causes.Fig. 6 (c) is the block diagram that represents halted state.Fig. 6 (d) is the lateral plan that represents halted state.

Friction part 10 plays the effect of the shoulder 12 of pressing tire 2 between the arm part of fork 5 and tire 2.At stop position, press the shoulder 12 of tire 2, thereby stop the rotation of wheel 1.In halted state, because the antagonistic force of the shoulder 12 of tire 2 increases to the rotational force that stops direction, but because encountering tire 2, operating portion 11 stops, so keep stablizing at stop position.Operating portion 11 is for operation, and for maintaining halted state.

Next, with reference to Fig. 7, the action of the castor to band brake describes.Fig. 7 (a) is the lateral plan that represents the release position of drg 8.In releasing position, utilize the central portion rear end of fork 5 inclined-plane elasticity and keep stable.If press operating part 11, makes it move to stop position from releasing position, as shown in Figure 7 (b) shows, drg 8 becomes the initial state that rotates about 15 ° from release position.If further press operating part 11,, as shown in Fig. 7 (c), drg 8 becomes the state midway that rotates about 30 ° from release position.If further press operating part 11,, as shown in Fig. 7 (d), drg 8 becomes the boundary condition that rotates about 45 ° from release position.

Boundary condition is, if the application of force is not known the unstable state of meeting to which direction rotation.In the time of the boundary position by between releasing position and stop position, the direction reversion of the rotational force that the antagonistic force of the shoulder 12 of tire 2 produces.If further press operating part 11, drg 8 rotates to stop position on one's own initiative, as shown in Fig. 7 (e), under the halted state of drg 8 being rotated to about 60 ° from release position, due to the antagonistic force of the shoulder 12 of tire 2 and apply rotational force to stopping direction, operating portion 11 is encountered tire 2 and is stopped, and is stably held in stop position.The in the situation that of brake off, rotate to boundary condition as long as lift operating portion 11, rotate on one's own initiative and be returned to release position with rear brake 8.

Next,, with reference to Fig. 8, the variation of the castor to band brake describes.Fig. 8 (a) represents the example of rigid plastic tire.In the situation that tire 2 is rigid plastic, by making drg 8 for nonrigid plastic, thereby can realize and function identical in the situation of rubber ratch tire.Fig. 8 (b) represents the example of twin caster.Be not limited to the castor of single-wheel, the castor of two-wheel is by connecting two castors also can realize identical braking function.Fig. 8 (c) represents the example of double head type operating portion.Operating portion for releasing operation is located to opposite side, thereby can forms double head type operating portion.

As mentioned above, in an embodiment of the present invention, the castor of band brake has: drg, wheel, fork and castor adapter plate, described drg is the front and back rotational force reversion of the boundary position between releasing position and stop position, stably be held in the single part of halted state by the bounce of tire shoulder at stop position, so can low cost and firmly form the castor of band brake.

In industry, utilize possibility

The castor of band brake of the present invention is suitable for the castor of traveling bag, carry bag most.In addition, be also applicable to the castor of perambulator, furniture etc.

Claims (1)

1. a castor for band brake, has: the wheel being made up of elastic tire and wheel hub, fork, described fork is remained described wheel can rotate by axletree, castor adapter plate, described castor adapter plate is remained described fork can rotate by bearing, and stop the drg of the rotation of described wheel, the castor of this band brake to be characterised in that, and described drg is the brake equipment of single hard part, this brake equipment has: be installed on the installation portion on the arm part of described fork, between the arm part of described fork and described tire and press the friction part of the shoulder of described tire, and operating portion, thereby described operating portion stops the either party's of the stop position rotating position to be moved to the opposing party's position for the shoulder that makes described drg press described tire in not pressing releasing position and the described friction part of state of shoulder of described tire from described friction part, in described releasing position, utilize described fork inclined-plane, central portion rear end elasticity and keep stable, at described stop position, utilize described tire shoulder antagonistic force and be stably held in halted state, the front and back of the boundary position between described releasing position and described stop position, the direction reversion of the rotational force that the antagonistic force of the shoulder of described tire produces.