JP2570307Y2 - Crawler device equipped with transported material lifting mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler (so-called "caster") device which is attached to a conveyed object placed on a floor or the like and has a function of pushing up the conveyed object from the floor or the like.

[0002]

2. Description of the Related Art Conventionally, as a carrier used in a clean room of a factory for manufacturing precision equipment and semiconductors, for example, a hand-held carrier (not shown) provided with a lifting piece such as a forklift claw is used. is there. In this transport vehicle, an elevating piece is inserted into a lower space of a pallet on which a transported article is loaded, and the transported article is transported while being lifted together with the pallet.

[0003] In addition, there are carts with free wheels (not shown) whose direction can be freely changed, and carts with roller crawlers (not shown) provided with a plurality of rollers circulating.

[0004]

However, in the case of a carrier having lifting pieces, the traveling roller has a small diameter and its direction cannot be changed. And may not be able to travel smoothly. or,
Since the carrier having the lifting pieces has a short distance to lift the pallet, there is also a problem that the lower surface of the pallet may be rubbed when traveling on concrete or asphalt having a lot of irregularities outside the clean room.

On the other hand, carts with free wheels and carts with roller crawlers do not incorporate a mechanism or a device for lifting a conveyed product from the floor, so that a separate device or tool for loading / unloading the conveyed product is required. Has problems.

[0006]

According to the present invention, there is provided a base plate mounted on a side surface of a conveyed object, a swing leg swingably mounted on the base plate in a vertical plane, the base plate and the swing A bolt provided between the base and the base plate for moving the swing leg closer to and away from the base plate; and a running body running on a running surface, wherein the running body is parallel to a vertical surface of the swing leg. The above-mentioned problem has been solved by a crawler device provided rotatably around a rotation center axis provided in the above.

[0007]

First, the worker attaches the crawler device with the swinging leg separated from the base plate to the side of the conveyed object at the base plate portion. At least three legging devices are attached to the transported object. Next, the worker tightens the bolt. The swinging leg approaches the base plate while pressing the traveling body against a traveling surface such as a floor, concrete, asphalt, or the like, and is brought closer to a vertical state from a state inclined with respect to the traveling surface. During this time, the conveyed material is pushed up from the running surface. The gap between the conveyed object and the running surface is set by the bolt tightening amount. As a result, the conveyed object is pushed up from the running surface and is supported by the cuff device.

[0008] Thereafter, the conveyed material is pushed by an operator and moved to a desired place. In the case where the finishing accuracy of the running surface is poor and a lateral force is applied to the wheel device, the wheel device travels while temporarily changing its direction about the rotation center axis. Finally, by loosening the bolt, the swinging leg is tilted back to its original state, and the conveyed object is lowered onto the running surface. The crawler device may be removed from the conveyed object, or may be left attached to the conveyed object.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The leg wheel device 10 includes a base plate 11, a swinging leg 12, a bolt 13, a universal wheel (running body) 14, and the like.

The base plate 11 is used to move the wheel device 10 to the article W
This is a part to be attached to the mounting bolts 26, 26. The transferred object W is a work, a mechanical part, an electric part, or
A basket for storing these. The swing leg 12 is provided on the base plate 11 such that the swing leg 12 can swing about a fulcrum pin 15 in a vertical plane. The swing leg 12 is formed with a step 16 that engages with a corner of the lower surface of the transported object W.

The universal wheel 14 has a wheel frame 18 that rotatably supports the traveling roller 17. The wheel frame 18 is attached to the rotation center axis 40 on the swing leg 12 so as to be rotatable around the rotation center axis 40. The rotation center axis 40 is provided on the swing leg 12 in parallel with the vertical plane. Therefore, the universal wheel 14 is mounted so that its direction can be changed with respect to the traveling direction.

The bolt 13 is connected to the base plate 11 and the swing leg 12.
And is provided between them. A bolt receiver 19 having a C-shaped cross section is formed on the swing leg 12. A spacer 20 is rotatably mounted on the bolt receiver 19. The bolt 13 passes through the bolt receiver 19 and the spacer 20. An escape hole 21 through which the bolt 13 passes is formed in the bolt receiver 19.

The nut 22 is rotatably mounted in a nut support hole 23 formed in the base plate 11. The bolt 13 is screwed into the nut 22. Base plate 1
1 has relief holes 24 and 25 through which the bolt 13 passes. The escape holes 24 and 25 and the nut support holes 23
Are formed in directions crossing each other. Bolt 1
3, the bolt receiver 19, the spacer 20, the nut 22, and the nut support hole 23 are disposed on both sides of the swing leg 12.

Next, the operation will be described. First, the worker puts the crawler device 10 in a state where the swing leg 12 is separated from the base plate 11.
Is attached to the side surface of the transported object W. The base plate 11 is attached to the article W by hooking the step 16 to a corner of the article W and attaching bolts 26, 26. At least three leg devices are attached to the transported object W.
At this time, the swinging leg 12 is inclined with respect to the floor F, and the traveling roller 17 is in contact with the floor F. The transported object W is placed on a table (not shown) and has a slight gap S with the floor F.

Next, the worker tightens the bolt 13.
The swinging leg 12 is moved closer to the base plate 11 and the transported object W, and approaches a vertical state from a state inclined with respect to the floor F (see FIG. 3). The swing leg 12 is tilted about the fulcrum pin 15. The tip of the bolt 13 enters below the conveyed object W as the bolt 13 is tightened. During this time, the transported object W is pushed up from the floor F. The gap S between the article W and the floor F is set by the amount of the bolt 13 tightened. The gap S is such an interval that the conveyed object W does not come into contact with the conveyed object W, even if the floor F or the running surface has some irregularities. Actually, the swing leg 12 does not approach the base plate 11 as shown in FIG. By the way,
The lifting amount of the transported object W is about 5 mm.

Thereafter, the transported object W is pushed by an operator and transported to a desired place. The direction of the universal wheel 14 changes with respect to the traveling direction. For this reason, floor F
Even on a running surface of asphalt, concrete, or the like having more irregularities, the universal wheel 14 can travel so as to avoid irregularities, and can smoothly transport the article W. Finally, the conveyed object conveyed to the desired place is the bolt 13
Is lowered onto the floor F by loosening. The cuff device 10 may be either attached to the transported object W or removed.

In the case where the conveyed object W which is "solid" on the floor F is pushed up and conveyed, a space for releasing the bolts 13 to be tightened must be formed in the conveyed object W. Further, since a pair of the bolts 13 is provided, it is possible to smoothly push up the transported object W by rotating the bolts 13 synchronously. The sprocket 27 is provided integrally with the bolt 113 shown in FIG.
A chain 28 is stretched over the chain 7. With this configuration, the bolt 113 can rotate synchronously.
Incidentally, the sprocket 27, instead of the chain 28 may connect Accordingly pair of bolts to the gear train composed of a plurality.

Further, as shown in FIG.
Instead, a known roller crawler (running body) 230 may be used. The roller crawler 230 has a frame 232 that supports a plurality of rollers 231 circulating infinitely. The frame 232 is provided rotatable in a horizontal plane by a pin (rotation center axis) 234 with respect to the support arm 233 and rotatable in a vertical plane by a pin 235. The support arm 233 includes the swing leg 21.
2 are provided integrally. The crawler device 210 using the roller crawler 230 can convey a heavier object than the crawler device 210 using the free wheel 214.

[0019]

[Effect of the Invention] The cuff device of the present invention has the following effects. (1) Since the load is pushed up by tightening the bolts, the worker can push up the load with a small force without using a crane, a forklift or the like, and transfer the load. (2) By adjusting the amount of bolt tightening, it is possible to adjust the gap between the conveyed object and the running surface according to the unevenness of the running surface that conveys the conveyed object, and to move along the bottom of the conveyed object. Contact with a surface can be avoided. (3) Since the traveling body can change its direction with respect to the traveling direction, the finishing accuracy of the traveling surface is poor, and even if lateral force is applied during traveling of the leg gear device. In addition, the leg device can run smoothly.

[Brief description of the drawings]

FIG. 1 is a front view of a cuff device according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of the crawler device in a state where a conveyed object is pushed up.

FIG. 4 is a partial front view of a bolt according to another embodiment.

FIG. 5 is a front view of a cuff device according to another embodiment.

[Explanation of symbols]

 W Conveyance object 10,210 Leg wheel device 11 Base plate 12,212 Swing leg 13,113 Bolt 14 Free wheel (running body) 40 Rotation center axis 230 Roller crawler (running body)

Claims (1)

(57) [Scope of request for utility model registration] 1. A base plate attached to a side surface of a conveyed object, a swing leg swingably attached to said base plate in a vertical plane, and said swing plate provided between said base plate and said swing leg. A bolt for moving the swinging leg toward and away from the base plate, and a traveling body traveling on a traveling surface, wherein the traveling body has a rotation center axis provided in parallel to a vertical surface of the swinging leg. A cuff device characterized by being provided so as to be rotatable therearound.