JPH0732162Y2 - Castor structure with two-dimensional stopper - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The present invention relates to a caster mechanism with a two-dimensional stopper capable of controlling a rotation stop shaft and a rotation stop shaft by tilting an operation lever.

[Prior art]

Conventionally, various structures have been proposed which are provided with a rotation stopping mechanism and a rotation stopping mechanism for casters, but the operations are performed separately. Therefore, when the user stops the rotation or rotation of the caster when carrying the mounted body, the operation becomes complicated and inconvenient. Therefore, in this type of caster, there is a demand for a caster mechanism that can be operated with one touch by depressing with a foot or the like.

[Problems to be solved by the device]

This invention was created as a result of earnest research in view of the above circumstances, and its main problem is to operate the rotation stop shaft and the rotation stop shaft via the link when the operation lever is tilted by stepping on it with a foot or the like. , To provide a caster mechanism capable of stopping the rotation and rotation of the caster.

[Means for solving problems]

In order to achieve the above object, the present invention provides (a). Fix the plate-shaped board below the mounted object,
Attach the casters downward at the end side thereof, (b). A link is provided so as to be movable back and forth along the longitudinal direction of the substrate, (c). An interlocking piece portion that is integrally connected to the link and that has a pair of long holes that respectively penetrate the rotation stop shaft and the rotation stop shaft and a peripheral wall that is provided to project along at least the longitudinal direction of the long holes. To provide (d). A cam rail is formed on each top surface of the peripheral wall, extends in the sliding direction of the link, and is formed at a high position set at the same height and at a low position connected to the high position via an inclined surface. ). The rotor, which is rotatably provided on the one cam rail, is pivotally mounted, and is vertically inserted into the one long hole so as to pass through the substrate and the lower end is provided on the revolving body of the caster. A swivel stop shaft is provided which is capable of projecting and retracting in the hooking hole and is biased in the retracting direction, (f). A brake body that is axially supported by a rotor rotatably provided on the other cam rail, is vertically inserted into the other elongated hole, penetrates the substrate, and has a lower end that brakes the wheels of the caster. (G) is provided with a rotation stop shaft that is connected to the tip end side of and is biased in a direction to brake the brake body. An operating lever is provided which is erected on the substrate and has a fulcrum in the center and is tiltably attached (h). The technical means is provided that an inclination of the operating lever is converted into a linear movement in the extending direction of the substrate to provide an operating mechanism for reciprocally sliding the link with a predetermined stroke.

[Action]

By depressing the operating lever, the tilting of the operating lever is converted into reciprocal sliding of the link in the extending direction of the substrate by the operating mechanism. The link slides and displaces the pair of peripheral walls via the interlocking plate portion. Along with this displacement, the cam rail formed on the top surface of each peripheral wall moves, and the rotation stop shaft and the rotation stop shaft are vertically displaced via the rotor according to the displacement of the height. Then, when the turning stop shaft descends, the turning stop shaft sinks into the hook hole of the turning body of the caster to restrain the turning of the caster, and when the rotation stop shaft descends, the brake body is pressed to brake the rotation of the wheels of the caster. When the foot lever is depressed in the opposite direction, the link is converted to the reverse direction by the actuating mechanism. As a result, the cam mechanisms for the rotation stop shaft and the rotation stop shaft are operated in the opposite directions, and the rotation stop shaft and the rotation stop shaft are pulled up against the biasing force. As a result, the rotation stop shaft pulls up the braking body to release the braking of the wheels. Further, the turning stop shaft comes out of the hook hole of the turning body of the caster, and the turning of the caster becomes free. In the present invention, since the cam rail extending in the sliding direction of the link is used, the height of the top surface of the cam rail can be adjusted so that the turning stop shaft and the rotation stop shaft can be individually lowered at different times.

【Example】

A preferred embodiment of the caster mechanism of the present invention will be described below with reference to the drawings. The caster mechanism 1 according to the first embodiment shown in FIG. 1 is fixed to the bottom surface of an attached body (not shown) with screws or the like. Reference numeral 2 denotes a plate-shaped substrate extending in the lateral direction, and casters 3 are pivotally attached to both ends of the plate-shaped substrate. Reference numeral 4 denotes a revolving structure, which is integral with the support yoke 4'of the caster 3 and covers the upper surface of the wheel 3A, and a hook hole 5 is formed in the upper surface. The swivel stop shaft 6 vertically penetrates through one of the long holes of the substrate 2, and the tip of the swivel stop shaft 6 can be retracted into the hook hole 5. The swivel stop shaft 6 is provided with springs 7 having both ends locked between a flange portion 6A which is fitted onto the swivel stop shaft 6 and protrudes in the middle thereof, and the bottom surface of the substrate 2, so that the swivel stop shaft 6 is hooked. It is urged in the direction in which it penetrates into the stop hole 5. Next, a rotation stop shaft 9 penetrates the other long hole of the base plate 2 so as to be slidable up and down, and its tip is connected to the tip of the brake plate 8. Here, the brake plate 8 is pivotally supported at its base end on a brake shaft 8A extending laterally on the side wall of the support yoke 4 '.
A spring 10 is provided between the rotation stop shaft guide 9 ′ and the rotation stop shaft guide 9 ′ so as to be fitted onto the rotation stop shaft 9 and is interposed therebetween.
Is urged downward to brake and press the brake plate 8. Next, the cam mechanism 13 is composed of a cam rail 11 and a cam roller 12, and the cam rail 11 has a high position parallel to the substrate 2 and a top surface formed at a low position connected to the high position via an inclined surface. Has become. Here, the cam rail 11 is an interlocking plate that slides on the substrate 2.
It is formed on the top surface of the peripheral walls provided on the front and rear and is arranged on the front and rear, and in the present embodiment, the peripheral wall is composed of a tubular part having a rectangular frame-like cross section that vertically penetrates and is integrated with the interlocking plate 14 to form a substrate. It is fixed to the tip of a link 15 that slides along the longitudinal direction of 2. The cam roller 12 is pivotally supported on both sides of the rotation stop shaft 6 and the rotation stop shaft 9, and is slidable on the top surface of the cam rail 11. Therefore, due to the displacement of the cam rail 11, the cam roller 12
The swivel stop shaft 6 and the rotation stop shaft 9 can be vertically moved up and down via the. Although one side of the substrate 2 is shown in the drawing, the other side is formed symmetrically with the side, so that the description is omitted. Next, 16 is a stepping operation lever, which is erected at the center of the substrate 2 via a holding plate 17 and is pivotally supported P1 so as to be tiltable to the left and right. The operating lever 16 has a vertical hole 21 in the center as shown in FIG. 1 (c), and the shaft-like tip portion of the conversion link 22 is provided in the vertical hole 21.
22A is locked. This conversion link 22 has a hole 22 into which a midway portion is pivotally supported P2 on the substrate 2 and a locking boss 23 protruding to the center of the link is fitted to the other end.
B is provided. With the above configuration, when the operation lever 16 is depressed in the braking release direction (left side in the figure), the tip 22 of the conversion link 22 is
A is displaced in association with the lateral displacement of the vertical hole 21, and rotates about the axis P2 to slide the link 15 along the longitudinal direction of the substrate 2. As a result, movement of the cam rail 11 causes the rotation stop shaft 6 and the rotation stop shaft 9 to move upward through the cam roller 12. Therefore, the swivel stop shaft 6 slips out of the hook hole 5 and the caster 3
Can be turned. At the same time, the rotation stop shaft 9 separates the brake plate 8 from the wheel 3A to enable rotation. Next, when the operation lever 16 is depressed in the braking direction, the cam mechanism 13 operates in the opposite manner to the above, and the cam mechanism 13 can pull down the rotation stop shaft 6 and the rotation stop shaft 9. Then, the urging forces of the respective springs 7 and 10 act to cause the turning stop shaft 6 to sink into the hook hole 5 and restrain the turning of the turning body 4.
Further, the rotation stop shaft 9 pushes up the brake plate 8 and presses it against the wheel 3A for braking. As a result, the turning stop and the rotation stop of the casters can be operated in synchronization with one touch. Here, as a second embodiment, the tilting of the operating lever 16 is set to two steps, and the link 15 is reciprocally moved in two steps. By disposing the respective cam rails 11 as shown in FIG. In the first stage, the turning stop shaft 6
By only moving downward and acting, and further advancing to the second stage, it becomes possible to lower and brake the rotation stop shaft 9 while maintaining the constraint of the turning stop shaft 6. The caster mechanism 1 of the third embodiment shown in FIG. 3 shows a different embodiment of the operation lever 16 and the conversion mechanism. Here, as shown in FIG. 3 (c), the operating lever 16 has three recesses 16A to 16C formed on the lower side thereof at equal intervals, and a spring-like protrusion 16D which is aligned with the recesses is mounted on the substrate 2. Cage,
The rotation angle of the operating lever 16 is kept constant. Further, a tip end of a conversion shaft 22 for converting a tilting motion into a reciprocating linear motion is locked in the vertical hole 21 of the operation lever 16, and the conversion shaft 32 is directly provided on the side wall of the link 15 having a channel-shaped cross section. It is fitted in the interlocking hole 24. Reference numeral 31 is a guide roller provided in the central hole of the center of the link 15, the details of which are shown in FIG. 3 (d). Here, the guide roller 31 is axially supported by the substrate 2 and
Slide rails on both sides of inverted channel-shaped guide pieces 32
33 is engaged, and the reciprocating motion of the link piece 15 is accurately performed. Further, in the illustrated example, the guide rollers 34 are provided on both sides of the link 15.
Are provided, but any one of these may be provided. Since the present embodiment has the above configuration, the conversion shaft 22 is displaced by the stepping operation of the operation lever 16, and this is linked with the link 15. The other structure is similar to that of the first embodiment, and the description thereof is omitted. In the fourth embodiment shown in FIG. 4, the lower end 41 of the operating lever 16 pivotally supported (not shown) on the substrate 2 by a supporting piece or the like is formed in the shape of a gear, and a pinion 42 meshing with the lower end 41 is used. The rack 43 fixed to the link 15 is moved in the left-right direction. Therefore, the link 15 can be reciprocated by utilizing the meshing of the gears. The rest of the configuration is the same as that of the first embodiment, so its explanation is omitted. A fifth embodiment shown in FIG. 5 shows yet another embodiment of the operating lever 16, in which the operating lever 16 is connected to the tip of a link 15 twisted at 90 ° from the middle. The other end of the link 15 is pivotally attached to one end of a second link 51 that is axially supported on the substrate 2. Then, the base ends of the cam rails 11 and 11 for the rotation stop shaft and the rotation stop shaft are pivotally attached to the second link 51 with a pivot point therebetween. Further, the cam rails 11 and 11 have their top surfaces in a raised shape which are opposite to each other. Therefore, the second link 51 rotates due to the linear movement of the link 15, and the respective cam rails 11, 11 move in the opposite directions. As a result, both the rotation stop shaft 6 and the rotation stop shaft 9 move up or down in synchronization with each other to restrain the rotation or rotation of the caster. In this case, although the second link is provided, it goes without saying that the link 15 may be directly used to slide the cam rail 11 having the same shape.

[Effect of device]

As described above, according to the present invention, the turning stop shaft and the rotation stop shaft can be actuated via the link to stop the turning and rotation of the caster by only one-touch operation such as stepping on the operation lever with a foot. As a result, the caster braking operation is simplified during the transportation work, and the efficiency can be further improved. Further, since the rotation stop shaft and the rotation stop shaft are slid up and down by using the cam, the caster can be surely restrained while maintaining a small size without taking a width, which is preferable. Further, since the cam rails extending in the sliding direction of the link are used, it is possible to change the operating time points of the rotation stop shaft and the rotation stop shaft by staggering the height positions of the cam rails on the respective peripheral walls.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a caster mechanism with a two-dimensional stopper according to the present invention. FIG. 1 (a) is a perspective view showing a main part thereof, FIG. 1 (b) is a sectional view of the main part, and FIG. FIG. 3C is a front view showing the operation of the operating lever, FIG. 2 is an explanatory view showing a cam roller of a second embodiment of the present invention, and FIG. 3 is a third view of the present invention.
FIG. 1A shows an embodiment, and FIG. 1A is a perspective view showing a main part thereof, FIG. 1B is a cross-sectional view of the main part, and FIG. 1C is a front view showing the action of an operating lever. ) FIG. 4 is a sectional view showing a guide roller, FIG. 4 shows a fourth embodiment of the present invention, FIG. 4 (a) is a perspective view showing the main part thereof, and FIG. 4 (b) is a sectional view of the main part. FIG. 5 (c) is a front view showing the action of the operating lever, FIG. 5 shows a third embodiment of the present invention, and FIG. 5 (a) is a perspective view showing the essential parts thereof, and FIG. FIG. 4 is a sectional view of a main part. 1 ... Caster mechanism 2 ... Substrate 3 ... Caster 4 ... Revolving unit 4 '... Support yoke 5 ... Retaining hole 6 ... Revolving stop shaft 7 ... Spring 8 ... Brake plate 9 ... Rotation stop Shaft 9 '…… Rotation stop shaft guide 10 …… Spring 14 …… Interlocking plate 15 …… Link 13 …… Cam mechanism 11 …… Cam rail 12 …… Cam roller 16 …… Operating lever

Claims (3)

[Scope of utility model registration request] 1. A caster mounted downward on the end side of a long plate-shaped substrate fixed below the mounted body, and a link provided so as to be movable back and forth along the longitudinal direction of the substrate. An interlocking piece portion that is integrally connected to the link and that has a pair of elongated holes that respectively penetrate the rotation stop shaft and the rotation stop shaft and a peripheral wall that projects at least along the longitudinal direction of the elongated holes. A cam rail that is formed on each top surface of the peripheral wall and extends in the sliding direction of the link, and is formed at a high position set at the same height and at a low position that is connected to the high position through an inclined surface; Is rotatably mounted on a cam rail of the cam rail, and is vertically inserted into one of the elongated holes to penetrate the substrate and the lower end of which is provided on the revolving body of the caster. It can be retracted into the hole and is urged in the direction of immersion. The rotation axis is rotatably supported by the rotor provided on the other cam rail so as to be rollable, and is vertically inserted into the other elongated hole to penetrate the substrate and the lower end of which is a wheel of the caster. The rotation stop shaft is connected to the front end side of the braking body and is urged in a direction to brake the braking body, and is mounted on the substrate so as to be tiltable with a fulcrum in the center. A caster mechanism with a two-dimensional stopper comprising an operation lever and an operation mechanism that converts the tilting of the operation lever into a linear motion in the extending direction of the substrate and reciprocally slides the link with a predetermined stroke. 2. The height position of the cam rail of one of the peripheral walls is set longer than the height position of the cam rail of the other peripheral wall in the sliding direction of the link.
The caster mechanism with a two-dimensional stopper described in. 3. The caster mechanism with a two-dimensional stopper according to claim 1, wherein casters are attached to both sides of the substrate so as to be rotatable.