JPS6132843Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a caster device provided in a carrier body having an article storage section.

Conventionally, a caster device is known in which a brake mechanism is combined with the caster itself. The braking mechanism is usually operable by foot when necessary. By the way, in a carrier with casters, if the casters are provided so as to protrude outward from the carrier body, the mutual spacing between the casters will increase and the posture will be stabilized, which is advantageous during use, especially when moving the carrier. However, on the other hand, When pushing into a limited space, such as when storing, the casters may get in the way. This problem can be solved by making the mutual spacing of the casters variable so that the casters can be retracted below the carrier body as required.
However, in that case, the brake mechanism is also pulled downward into the carrier body at the same time as the caster is pulled in, making it difficult to operate the brake mechanism. Further, in order to facilitate the operation of the brake mechanism, it is generally considered that the operation lever thereof should be provided on the upper part of the carrier. However, since the caster is rotatable about its mounting shaft, it is difficult to realize a mechanism that transmits the operating force of the operating lever to the wheels of the caster as braking force.

Therefore, an object of the present invention is to provide a caster-equipped device having a brake mechanism in which an operation lever is provided on the upper part of the carrier body to facilitate operation.

A further object of the present invention is to achieve the above object in a caster device having a caster that can be retracted below the carrier body.

Examples will be described below with reference to the drawings.

FIG. 1 shows a carrier equipped with an embodiment of the caster device according to the invention. In FIG. 1, a carrier main body 1 has a large number of article storage sections 2 arranged in upper and lower stages. These article storage sections 2 are made in a shape suitable for storing, for example, magnetic tape wound on a reel in a case with a disk-like appearance, but other types of It may also be used to store articles.

At each of the four corners of the lower surface of the carrier body 1, sliders 4 are provided which are movable independently in the left and right directions, that is, in the three directions of the arrows. As is clear from FIG. 2, the slider 4 has small wheels 5 on both sides, and by rolling these small wheels 5 along the guide rail 6, it can easily move in the three directions of the arrows. is being used. The slider 4 is further urged outward from the carrier body 1 by a spring 7, but is prevented from falling off by being locked at an appropriate position.

A caster 8 is provided on the lower surface of each slider 4. A guide roller 12 is attached to the outer periphery of the mounting shaft 9 of the caster 8 via a radial bearing 11.
are fitted to be rotatable and slidable in the axial direction. The guide rollers 12 usually extend partially to both sides of the carrier body 1, and when the carrier is pushed into a narrow space, they are pushed by the walls forming the space. When the guide rollers 12 are pushed inward, the casters 8 and the sliders 4 are pushed below the carrier body 1.

Further, referring to FIG. 3, a brake shoe member 14 is provided on the upper surface of the frame 13 of the caster 8.
is attached with its midway portion being rotatably supported by a pin 15. As shown in FIG. 4, this brake shoe member 14 has a U-shaped portion 14a at one end that fits around the outer periphery of the radial bearing 11 with a gap and faces the lower surface of the guide roller 12.
The other end 14b extends below the frame 13 and is positioned to face the outer peripheral surface of the wheel 10. The brake shoe member 14 is biased counterclockwise in FIG. 2 by a spring 16 so that its U-shaped portion 14a pushes up the guide roller 12 and the other end 14b moves away from the wheel 10. has been done.

The link member 17 facing the upper surface of the guide roller 12 also has a U-shaped portion 17a at one end that fits onto the outer periphery of the radial bearing 11 with a gap. The link member 17 is rotatably attached to the slider 4 by a fulcrum 18. Another link member 21 is rotatably attached to the slider 4 by another fulcrum 19. And link member 1
The other end of 7 is rotatably connected to one end of another link member 21.

On the other hand, brake levers 22 are provided on the upper front and rear surfaces of the carrier body 1. These brake levers 22 have attachment ends 22a.
The brake lever 22 is rotatable around the center of the wire fixing bar 23. A wire fixing bar 23 is suspended near the mounting end 22a of the brake lever 22. The connection between the brake lever 22 and the wire fixing bar 23 is structured to be rotatable. A brake wire 24 is connected between the wire fixing bar 23, which can be moved up and down by operating the brake lever 22, and the other end 21a of the link 21. As a result, the brake lever 22
When the brake wire 24 is pulled,
This force is transmitted to the brake shoe member 14 via the link members 21, 17, and the guide roller 12. That is, one end 17a of the link member 17 presses down the guide roller 12, and the brake shoe member 14 is rotated clockwise in Fig. 2 against the spring 16, thereby pressing it against the wheel 10. Thus, the carrier is braked.

Further, a holding mechanism is provided corresponding to the wire fixing bar 23 to hold the brake mechanism in an activated state. This holding mechanism also refers to FIG.
It includes a cylindrical bearing 25 fixed to the carrier body 1 with screws or the like, and a latch shaft 26 rotatably fitted into the cylindrical bearing. The cylindrical bearing 25 has a window 25a extending along the circumferential direction. The latch shaft 26 has a flat bottom groove 26a at a position corresponding to the window 25a of the cylindrical bearing 25. A latch handle 27 is integrally provided at one end of the latch shaft 26, and a spring hanging plate 28 is fixedly attached to the other end with screws 29. The latch shaft 26 is biased by a tension spring 31 suspended on a spring plate 28. Now, in FIG. 3, the wire fixing bar 23 is inserted into the position where the groove 26a of the latch shaft 26 corresponds to the window 25a of the cylindrical bearing 25.
indicates a depressed state. In this state, the latch shaft 26 is prevented from rotating by the wire fixing bar 23 at the rotation angle position where the tension spring 31 is fully stretched. By operating the brake lever 22, the wire fixing lever 23 is
is lifted, the latch shaft 26 is rotated by the tension spring 31, and the cylindrical bearing 25
Since the portion other than the groove 26a corresponds to the window 25a, the lowering of the wire fixing lever 23 is prevented, that is, the brake mechanism is maintained in the operating state. When the latch handle 27 is turned to align the groove 26a of the latch shaft 26 with the window 25a of the cylindrical bearing 25, the wire fixing lever 23 is lowered and the brake mechanism is released. Note that 32 is a wire return spring for returning the brake wire 24 when the brake is released.

As explained above using the embodiments, the caster device of the present invention is provided in a carrier body having an article storage section, and is movable in a horizontal plane near the end of the lower surface of the carrier body. A slider provided, a first spring biasing the slider toward the outside of the carrier body, a caster attached to the lower surface of the slider, and a caster rotatable around a mounting shaft of the caster. Moreover, a guide roller is provided to be slidable in the axial direction and protrudes outward from the carrier body, and a midway portion is rotatably attached to the frame of the caster.
a brake shoe member with one end facing the lower surface of the guide roller and the other end facing the wheel of the caster, and a second spring biasing the brake shoe member in a direction away from the wheel of the caster; a first link member that is pivotally supported by the slider and has one end facing the upper surface of the guide roller; and a first link member that is pivotally supported by the slider and has one end rotatably connected to the other end of the first link member. a second link member, a brake lever provided at the top of the carrier body;
a wire connected between the other end of the brake lever and the second link member and transmitting force such that one end of the first link member presses the guide roller downward when the brake lever is operated; and the wire and a holding mechanism that holds the brake in an activated state.

Therefore, according to the caster device of the present invention,
Since the casters normally correspond to a relatively outer position of the carrier body, the stability of the carrier body can be maintained sufficiently during movement, and when the carrier body is pushed into a narrow space, it can be used as a member that defines the sides of the space. Since the guide roller is pushed by the guide roller, the caster is retracted below the carrier body, so that the caster does not get in the way when pushing the carrier body into a narrow space.
Furthermore, the brakes can be operated using the brake lever installed on the top of the carrier body, making it easy to operate the brakes even when the carrier body is pushed into the narrow space mentioned above. .

It goes without saying that various modifications are possible.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of an embodiment of a carrier with casters according to the present invention, Fig. 2 is a cross-sectional view of the caster mounting portion, Fig. 3 is a perspective view of the brake mechanism, and Fig. 4 is a perspective view showing an embodiment of the carrier with casters according to the present invention. FIG. 5 is a perspective view of only a part of the brake mechanism, and FIG. 5 is an exploded perspective view of a holding mechanism that holds the brake mechanism in an operating state. 1...Carrier body, 4...Slider, 7...
Spring, 8... Caster, 9... Mounting shaft,
10...Wheel, 12...Guide roller, 13...
Frame, 14...Brake shoe member, 16...
... Spring, 17, 21 ... Link member, 22
...Brake lever, 24...Brake wire.

Claims (1)

[Scope of utility model registration request] A caster device provided in a carrier body having an article storage section, the slider being movable in a horizontal plane near the end of the lower surface of the carrier body, and the slider directed outward from the carrier body. a first spring biased by the slider; a caster attached to the lower surface of the slider; a protruding guide roller; a brake shoe member rotatably attached to the frame of the caster; one end facing the lower surface of the guide roller and the other end facing the wheel of the caster; a second spring that urges the show member away from the wheels of the caster; a first link member that is pivotally supported by the slider and has one end facing the upper surface of the guide roller; a second link member which is supported and whose one end is rotatably connected to the other end of the first link member; a brake lever provided on the upper part of the carrier body; the brake lever and the second link member; is connected between the other ends of the link member, and when the brake lever is operated, the first
A caster device equipped with a brake, characterized in that one end of the link member includes a wire that transmits a force so as to push the guide roller downward, and a holding mechanism that holds the wire in a brake operating state.