JP6923416B2 - Lifter - Google Patents

Description

The present invention relates to a hoist used in a railway.

Conventionally, lifters (Yamakoshi, hoisting machines) have been used to lift switches and rails on railways. This hoisting device comprises a traveling girder including two horizontal members provided in parallel and legs supporting both ends of the horizontal members, and a hoisting device having wheels on the horizontal members. The load chain is arranged so as to be freely travelable, and a load chain having a hook is suspended in a gap between the horizontal members so as to move up and down (see, for example, Patent Document 1). In this conventional hoist, the load chain of the hoisting device is arranged in the center so that the horizontal member evenly bears the load at the time of hoisting.

In this conventional lifting device, since it is necessary to arrange two horizontal members formed in a square tubular shape, it is unavoidable to increase the weight of the traveling girder, and there is a problem that it is difficult to transport. For this reason, there has been proposed a lifting device in which a horizontal member is composed of one, a traversing device is mounted on the horizontal member so as to be travelable, and a hoist is provided below the center of the traversing device (for example,). See Patent Document 2).

Japanese Unexamined Patent Publication No. 2005-76421 Japanese Unexamined Patent Publication No. 2005-273312

However, in the above-mentioned conventional lifting device (Yamakoshi device) described in Patent Document 2, when a chain block is used to lift a relatively light heavy object such as a switch or a signal device, a lifting allowance required for the work is required. In order to secure the above, the height of the traveling girder must be increased. For this reason, there is a problem that the legs must be lengthened and become heavy.

The present invention has been made to solve the above problems, and even if the height of the traveling girder is restricted, the required lifting allowance can be secured, and the lifting device can contribute to weight reduction. The purpose is to provide.

The lifting device according to the present invention is a lifting device including a traversing device that can travel along a traveling girder and a lifting portion that is attached to the traversing device and lifts a lifting material. It is characterized by being arranged in a laterally biased manner.

In the lifting device according to the present invention, in a lifting device including a traversing device that can travel along a traveling girder and a lifting portion that is attached to the traversing device and lifts a lifting material, the lifting portion is mounted on the traveling girder. By arranging the equipment in a laterally offset manner, it is possible to secure a longer lifting allowance even for a small lifting device with a limited running girder height, so the device should be made smaller and lighter. This makes it possible to improve work efficiency, reduce the number of workers, and reduce costs.

Further, in the lifting device according to the present invention, it is desirable that the lifting portion is composed of a chain block and is locked to one side portion of the traversing device. With such a configuration, the chain block can be arranged at a higher position, and the lifting allowance can be increased accordingly. Further, the traversing device preferably has an upper roller that rolls on the upper surface of the traveling girder formed in a square cylinder shape, and a support roller that rolls on both side surfaces of the traveling girder to support an eccentric load. Further, the support rollers are a first support roller that abuts on the lower end of one side surface of the traveling girder on the lifting portion side, and a second support roller that abuts on the upper end of the other side surface of the traveling girder on the opposite side of the lifting portion. It is preferable that the structure is provided with. With such a configuration, the force of the rotational moment due to the weight of the chain block provided unevenly with respect to the traversing device can be dispersed and evenly distributed. Further, it is preferable that the traversing device is detachably attached from above the traveling girder. Further, it is desirable that the traversing device includes a braking portion. Further, the traveling girder is preferably configured with support legs whose height can be adjusted at both ends.

The lifting device according to the present invention is a lifting device including a traversing device that can travel along a traveling girder and a lifting portion that is attached to the traversing device and lifts a lifting material. Since the arrangement is biased in the lateral direction from the above, the ratio of the lifting allowance to the height of the traveling girder can be increased, the workability can be improved, and the weight of the lifting device can be reduced.

(A) and (B) are a plan view and a front view showing a lifting device according to an embodiment of the present invention, respectively. It is a side view of the hoist of FIG. It is a rear view of the traversing device of the hoist of FIG. FIG. 3 is a vertical cross-sectional view taken along line IV-IV of the traversing device of FIG. It is a side view of the traversing device of FIG. FIG. 5 is a vertical cross-sectional view taken along the VI-VI line of the traversing device of FIG. It is a top view of the traversing apparatus of FIG. It is a front view of the traversing device of FIG.

Hereinafter, the lifting device according to the present invention will be described with reference to one embodiment shown in the drawings. As shown in FIGS. 1A, 1B and 2), the lifting device (Yamakoshi device) 2 according to the embodiment of the present invention includes a traveling girder 3 made of a hollow square tubular material having a rectangular cross section. , The traversing device 5 and the chain block (lifting portion) 30 are provided. Inverted V-shaped support legs 4 and 4 that support the traveling girder 3 are foldably attached to both ends of the traveling girder 3. The traveling girder 3 preferably has a girder length of 3,500 mm. In a railway, the lifting device 2 according to the present embodiment is used for lifting a relatively light heavy object such as a switch or a signal device.

Each of the support legs 4 is a bifurcated leg in which the tubular leg portion 5A is formed in an inverted V shape. The telescopic leg portion 5B is housed inside the tubular leg portion 5A so that the leg length can be adjusted. As shown in FIG. 2, a large number of adjusting holes 6 are bored in the telescopic leg portion 5B in the vertical direction. At the time of adjustment, the hole 7 formed in the lower part of the tubular leg portion 5A and the selected adjustment hole 6 of the telescopic leg portion 5B are overlapped, and the pin 8 is inserted through the overlapping holes 7 and 6. ing. Reference numeral 9 is a handle provided at both ends of the traveling girder 3. The support leg 4 preferably has a traveling girder height H of 1377 mm when the telescopic leg portion 5B is extended to the maximum. Further, the support leg 4 is folded in this state when the telescopic leg portion 5B is housed in the tubular leg portion 5A and the running girder height H when the shortest is shortened is 840 mm.

The traversing device 5 is detachably mounted on the traveling girder 3 from above. As shown in FIGS. 3 to 6, the traversing device 5 is provided on the main body 10, the upper part of the main body 10, the upper rollers 11A and 11B that roll on the upper surface 3A of the traveling girder 3, and each side surface of the traveling girder 3. It includes front support rollers (first support rollers) 12A and 12B that roll 3B and 3C, rear support rollers (second support rollers) 13A and 13B, and a braking device 20. The main body 10 is formed with front and rear side plates 14A and 14B facing each side surface 3B and 3C of the traveling girder 3, and a notch 15 corresponding to the shape of the traveling girder 3, and is formed on the left and right end faces of the front and rear side plates 14A and 14B. It includes left and right frame plates 14C and 14D to be connected, and upper plates 14E connecting the upper ends of the front and rear plates 14A and 14B and the inner side upper ends of the left and right frame plates 14C and 14D. The dimension between the front-rear side plates 14A and 14B is 210 mm, the front-rear direction dimension of the upper plate 14E (the front-rear direction dimension of the left and right frame plates 14C and 14D) is 314.5 mm, and the upper surface of the upper plate 14E to the lower end of the front-rear side plates 14A and 14B. It is preferable that the dimension up to is 278 mm. The traveling girder 3 preferably has a width of 80.7 mm and a height of 172 mm.

The brake device (braking unit) 20 includes an operation lever 21, a screw portion 22 connected to the operation lever, and a pad 23 provided at the tip of the screw portion, and is configured by rotating the operation lever 21. The pad 23 is pressed against the traveling girder 3 to perform a braking operation. Reference numeral 17 is a handle.

By the way, in the lifting device 2 according to the present embodiment, the left and right frame plates 14C and 14D are formed between the left and right frame plates 14C and 14D having the front side projecting in a trapezoidal shape as shown in FIGS. 4 and 5. The support rod 16 is provided horizontally so that the hook 31 of the chain block 30 is suspended. That is, the chain block 30 is arranged so as to be displaced in the width direction (horizontal direction) with respect to the longitudinal direction of the traveling girder 3, in other words, in the lateral direction with respect to the traveling path of the traversing device 5. In the support rod 16, the distance from the center line C of the traveling girder 3 and the distance from the upper ends of the left and right frame plates 14C and 14D can be determined according to the weight of the heavy object lifted by the chain block 30. There is. In the present embodiment, it is preferable to provide the traveling girder 3 at a distance of 179 mm from the center line and 107 mm from the upper ends of the left and right frame plates 14C and 14D. The position of the support rod 16 is not limited to this, and may be laterally biased with respect to the traveling path of the lifting device 2 (longitudinal direction of the traveling girder 3), and the left and right frame plates 14C , 14D may be located above the above position. With such a configuration, it is possible to secure a larger lifting allowance M for the chain block 30 with respect to the traveling girder height H, as compared with arranging the chain block below the lifting device.

In the lifting device 2 according to the present embodiment, the chain block 30 is arranged so as to be laterally biased with respect to the traveling path. Therefore, when lifting a heavy object, the lifting device 2 is provided with the traveling girder 3. A moment in the direction of rotation acts at the center. Therefore, as shown in FIGS. 4 and 8, the front support rollers 12A and 12B are shown at the lower end of the front side surface 3B of the traveling girder 3, and the rear support rollers 13A and 13B are shown in FIGS. 3 and 4. As described above, the traveling girder 3 is in contact with the upper end portion of the side surface 3C on the rear side and rolls. Therefore, the upper rollers 11A and 11B, the front support rollers 12A and 12B, and the rear support rollers 13A and 13B support the eccentric load.

Next, the operation of the lifting device 2 according to the present embodiment will be described based on the operation of the lifting device 2. First, in the lifting device 2, the support legs 4 are set to a desired length, and the traveling girder 3 is installed in a work place so as to be horizontal. Next, the traversing device 5 is placed on the traveling girder 3 from above, and the hook 31 of the chain block 30 is suspended from the support rod 16 to prepare for the process. When the handle 17 is operated, the traversing device 5 freely travels on the traveling girder 3. At this time, since the chain block 30 is arranged on the front side in the lateral direction of the traversing device 5, the lifting allowance M can be increased as compared with the case where the chain block is arranged on the lower side of the traversing device 5. Therefore, workability is improved. Further, since it is not necessary to raise the traveling girder 3, the entire device can be made smaller and lighter.

In the above embodiment, the lifting portion is locked to one side portion of the traversing device, but the present invention is not limited to this, and as long as each roller supports an eccentric load, the upper portion of the one side portion of the traversing device is above. It may be locked to to earn more lifting allowance. That is, the left and right frame plates may be extended upward and positioned above the upper plate. In that case, it is preferable that the lower surface of the chain block is at substantially the same level as the lower surface of the traveling girder. Further, in the above embodiment, the lifting portion is composed of the chain block 30, but the present invention is not limited to this, and it is not limited to manual and electric, and other hoisting machines and lifting devices may be used. Not to mention.

2 Lifter 3 Traveling girder 5 Traverse device 30 Chain block (lifting part)

Claims (8)

In a railway lifter provided with a traveling girder having support legs attached to both ends thereof, a traversing device that can travel along the traveling girder, and a lifting portion attached to the traversing device to lift a lifting material.
The traversing device
A pair of plates that form a notch corresponding to the shape of the traveling girder and are parallel to each other along the direction perpendicular to the longitudinal direction of the traveling girder.
A portion of the pair of plates that projects laterally from the side surface of the traveling girder, and includes a support member that extends along the longitudinal direction of the traveling girder and is attached to the pair of plates.
A railroad lifter, wherein the lifter is supported by the support member. The lifting portion includes a chain block and has a chain block.
The lifting device according to claim 1 , wherein the hook of the chain block is suspended from the supporting member. The railway lifter according to claim 1 , wherein the support member is composed of a support rod attached between the pair of plates. The transverse device, supporting a roller on which rolls a crane upper surface formed in a rectangular tube shape, and a supporting roller rolling on the both side surfaces of the crane, the unbalanced load lifting side by the rollers The railroad hoist according to any one of claims 1 to 3, wherein the lifting device is for railroad. The support rollers, the running digit, a first support roller which abuts against the lower end of one side of the lifting side, the travel of digits, the lifting portion and the opposite side of the other side surface in contact with the upper end of the second The railroad hoist according to claim 4, further comprising a support roller of the above. The railway hoist according to any one of claims 1 to 5, wherein the traversing device is detachably attached from above the traveling girder. The transverse device, railway lifting device according to any one of claims 1 to 6, characterized in that it comprises a braking portion which is pressed against the brake pad to the crane a braking lever is rotated .. The railroad lifter according to any one of claims 1 to 7, wherein the support legs are adjustable in height.

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