JP2005132195A - Wheel dolly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a housing space for overlapping and housing a plurality of wheel dollies, and to facilitate housing work regarding the wheel dolly used for replacing and carrying a tire of an automobile. <P>SOLUTION: This wheel dolly is equipped with a pair of frames 2 and 3 arranged on both sides, struts 4 and 5 vertically provided on the back of the pair of the frames 2 and 3, a connecting member 6 suspended between the struts 4 and 5, and a pair of support arms 27 and 28 provided on the struts 4 and 5 capable of being lifted and lowered. A space 7 from a floor F is provided under the connecting member 6 so as to go through along the front and rear directions, and the space 7 is formed to be in a dimension so that the frame on the one side and the lowered support arm on the one side can be inserted through thereof along the front and rear directions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wheel dolly used for exchanging and transporting automobile tires.

  Conventionally, as a wheel dolly used for exchanging and transporting automobile tires, for example, as shown in FIGS. 13 to 15, the rear ends of a pair of frames 101 and 102 arranged on both sides are connected to a connecting member 103. A base frame 104 is formed, a wheel 105 is provided on the base frame 104, columns 106 and 107 are erected on both sides of the connecting member 103, and elevators 108 and 109 can be moved up and down on the columns 106 and 107. The support arms 110 and 111 for supporting the tires are provided on the lifting and lowering bodies 108 and 109 so that the support arms 110 and 111 can be tilted around the support shafts 112 and 113, and the support arms 110 and 111 are moved up and down by the driving device 114. Further, as shown in FIG. 15, the frames 101 and 102 are formed in a square shape in such a manner that the distance from each other is widened on the front side. As shown in FIG. 15, a pair of frames 101 and 102 are known to enter from the rear of another wheel dolly to the outside of the frames 101 and 102 of the other wheel dolly when they are not used. (For example, refer to Patent Document 1).

  However, in the conventional wheel dolly, since both the frames 101 and 102 are opened in a C shape, one wheel dolly is increased in size, and the support arms 110 and 111 are lifted from the floor surface in a lying state. Since the height is in the state shown in FIG. 14 with respect to the connecting member 103, the support arms 110, 111 are illustrated so that the supporting arms 110, 111 do not hit the connecting member 103 of another wheel dolly during the storage as described above. There is a problem that it is necessary to stand up as shown by 14 chain lines, which requires time and effort for the storing operation.

The connecting member 103 is provided on the rear end surfaces of the frames 101 and 102, and the height of the connecting member 103 and the frames 101 and 102 from the floor is the same. Even if the frames 101 and 102 are inserted and inserted between the frames from behind, the frames 101 and 102 interfere with the connecting member 103, and the frames 101 and 102 cannot be stored.
For this reason, the storage state as shown in FIG. 15 is obtained, the overlap in the front-rear direction is reduced, and a relatively large storage space (storage space) is required.
JP 2000-52994 A

  The present invention can reduce the storage space in comparison with the conventional wheel dolly, and further reduce the size of one wheel dolly and store it in a lying state without raising the support arm as described above. An object of the present invention is to provide a wheel dolly that facilitates the storing operation in such a manner as to be possible.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a pair of frames arranged on both sides, a column erected on the rear part of the pair of frames, and a connection constructed between the columns. And a wheel dolly having a pair of support arms provided so as to be movable up and down on both pillars, wherein a space from the floor surface is provided under the connecting material in the front-rear direction, and the space is disposed on the one side. The side frame and the lowered support arm on one side are formed in a size that can be inserted in the front-rear direction.

  According to a second aspect of the present invention, in the first aspect of the present invention, the height of the space from the floor surface is determined from the height of the upper surface of the frame and the floor surface of the upper surface of the lowered support arm. The height is set higher than the height, and the length in the left-right direction of the space is set to be approximately equal to or greater than the inner distance between the two support arms.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the pair of frames and the connecting member are arranged in a U-shape when viewed from above so that the pair of frames are parallel to each other. Are arranged in parallel with the pair of frames.

  According to the present invention, when the wheel dolly is stored, one frame and one lowered support arm of the wheel dolly of the present invention are inserted from the space formed in the rear part of the other wheel dolly of the present invention, Both wheel dollies can be stored in the front and back.

As a result, as compared with the conventional structure in which the frame is stored in a C-shaped frame, the overlap in the front-rear direction can be increased and the storage space (storage space) can be reduced.
In addition, since it is not necessary to raise the support arm during storage as in the conventional case, the storage operation is facilitated.

  Furthermore, in one wheel dolly, since the frame can be provided in parallel in a close state with respect to the support arm provided in parallel in the front-rear direction, the wheel dolly having the conventional C-shaped frame is provided. As compared with, the width of the wheel dolly in the left-right direction can be shortened, and the wheel dolly can be downsized.

The best mode for carrying out the present invention will be described based on the embodiment shown in FIGS.
The pair of frames 2 and 3 constituting the wheel dolly 1 are arranged substantially in parallel in the same plane, and support columns 4 and 5 are fixedly erected on rear upper surfaces of the frames 2 and 3. A connecting member 6 is laid and fixed between the support columns 4 and 5 at a position spaced above the upper surfaces of the two frames 2 and 3, and both the frames 2 and 3 and the connecting member 6 are It is arranged in a U shape when viewed from above.

A space 7 from the floor surface F is formed below the connecting member 6 so as to penetrate in the front-rear direction.
The height of the space 7, that is, the height H 1 from the floor surface F to the lower surface of the connecting member 6 is the dimension that allows the frames 2 and 3 to be inserted, that is, the height from the floor surface F to the upper surfaces of both frames 2 and 3. The dimension is set longer than the length H2. Further, the space 7 is formed over the space L1 between the wheel mounting members 8 and 9 fixed to the rear portions of both side portions of the connecting member 6, and the length L1 in the left-right direction of the space 7 is at least one of the frames 2. Or it is set longer than the space | interval L3 of the outer side surface of 3 and the inner side surface of one support frame 27 or 28 mentioned later. In the example shown in the figure, the distance is set to be approximately equal to or more than the inner distance L2 of the pair of support arms 27 and 28.

Front wheels 10 and 11 are attached to the front ends of the frames 2 and 3, and rear wheels 12 and 13 are attached to the wheel mounting members 8 and 9. The upper surfaces of the wheel attachment members 8 and 9 are set higher than the height H1 of the space 7.
A mounting base 14 is fixed on the upper surfaces of the wheel mounting materials 8 and 9, and a support mechanism 15 for a support arm, which will be described later, is mounted on the mounting base 14. The drive mechanism 15 includes a hydraulic cylinder 16, an air pump 17 that drives the hydraulic cylinder 16, a chain 18 that moves up and down by the hydraulic cylinder 16, a manual pedal 19, and the like. The manual pedal 19 can be stood and stowed in the chain line state 19a in FIG. 1 when not in use (stored).

Next, the support arm will be described.
Both the struts 4 and 5 are formed in a U-shaped cross-section with an inner opening, and elevating members 20 and 21 are provided in the both struts 4 and 5 so as to be movable up and down. Arm plates 22, 23 project forwardly from the inside of the lifting members 20, 21, and arm support plates 24, 25 are erected on the arm plates 22, 23.

  A connecting rod 26 is erected and connected in a horizontal state between the lower portions of the arm support plates 24 and 25. Therefore, both the elevating members 20 and 21 are integrally moved up and down, and when the chain 18 connected to one elevating member 20 is raised and lowered by the hydraulic cylinder 16, both the elevating members 20 and 21 21 is moved up and down integrally, and the connecting rod 26 is moved up and down in a horizontal state.

  A cylinder portion 27 a fixed to the base end of one support arm 27 is fitted to one side portion of the connecting rod 26, and a cylinder fixed to the base end of the other support arm 28 is fitted to the other side portion. The portion 28a is fitted, and both the supporting arms 27, 28 are held by the cylindrical portions 27a, 28a so as to protrude forward in a substantially horizontal state. The pair of support arms 27 and 28 are arranged in parallel to each other in the same plane, and are arranged in parallel with both frames 3 and 4 between the frames 3 and 4.

Further, the cylindrical portion 28a of the other support arm 28 is provided so as to be slidable in the axial direction with respect to the connecting rod 26, and the both support arms correspond to the diameter of the tire supported by the both support arms 27 and 28. The distance between 27 and 28 can be changed.
Further, the angle of the both support arms 27 and 28 with respect to the horizontal can be adjusted by the angle adjustment handle 29 as shown by a chain line in FIG.

In addition, when the arm support plates 24 and 25 are lowered, the both support arms 27 and 28 fit between the frames 2 and 3, as shown by the solid lines in FIGS. The height H3 of the upper surfaces 27 and 28 from the floor surface F is substantially within the height H2 of the frames 2 and 3 from the floor surface F. In the illustrated embodiment, H3 is set lower than H2.
Therefore, the lowered support arms 27 and 28 can be inserted into the space 7 of another wheel dolly together with the frames 2 and 3.

Next, a method for using the wheel dolly will be described.
When replacing tires of trucks of large and medium-sized vehicles at a maintenance shop or the like, the trucks are lifted to a predetermined height by a lift. In the case of large-sized vehicles and medium-sized vehicles, there are not only four-wheeled vehicles but also six-wheeled vehicles, and in this case, the wheel dolly 1 is used as many as the number of wheels, and one is arranged directly under each wheel.

In each wheel dolly 1, the hydraulic cylinder 16 is operated by the air pump 17 to raise the elevating members 20 and 21 and raise both the support arms 27 and 28 directly below the wheels. Then, after the removed wheel is placed between the support arms 27 and 28 and the wheel dolly 1 is retracted, the support arms 27 and 28 are lowered by the hydraulic cylinder 16 to lower the wheels.
When wheels are mounted on a lifted automobile, the wheels are placed on the support arms 27 and 28 of the wheel dolly 1 and the operation is reversed.

Next, a case where a plurality of wheel dollies 1 used as described above are accommodated will be described.
Since the space 7 is formed in the lower part of the connecting member 6 in each wheel dolly 1 and the drive mechanism 15 is disposed outside the space 7, both the support arms 27 and 28 of the wheel dolly 1 are shown in FIGS. 1 and 4. As shown by the solid line, the one support arm 27 or 28 and one frame 2 or 3 are inserted through the space 7 from the rear side of the other wheel dolly 1, and the support arm 27 of the other wheel dolly 1 is inserted. , 28 are inserted in parallel.

  For example, as shown in FIG. 10, from the rear side of the first wheel dolly 1A, one frame 2 and one support arm 27 of the second wheel dolly 1B are inserted through the space 7 to support the first wheel dolly 1A. Inside the arm 27, the frame 2 of the second wheel dolly 1B and the support arm 27 are housed in a parallel state close to the support arm 27 of the first wheel dolly 1A. The other frame 3 of the second wheel dolly 1B and the support arm 28 are arranged in close proximity on the outside of the other frame 3 of the first wheel dolly 1A.

  Next, one frame 2 and the support arm 27 of the third wheel dolly 1C are connected to the second wheel dolly 1B in the same manner as described above through the space 7 from the rear of the second wheel dolly 1B accommodated as described above. Insert into and store. Such storage is repeated in order, and the number of used wheel dollies is stored.

  By storing as described above, the frame and the supporting arm can be inserted deeply into other wheel dollies. Therefore, compared with the conventional storage method as shown in FIG. It can be stored in large numbers, and the storage length in the front-rear direction of the wheel dolly can be shortened. Therefore, the storage space (storage space) for many wheel dollies can be reduced.

Further, the wheel dolly can be stored as shown in FIG. 11 or FIG.
Further, when storing, both the supporting arms 27 and 28 do not need to be operated upright as in the prior art, so that the storing work is facilitated.

  Further, in the single wheel dolly 1, both the frames 2 and 3 can be arranged in parallel right next to the two support arms 27 and 28 arranged in parallel in the front-rear direction. The length (width) in the direction can be made smaller than that of a wheel dolly having an expanded frame as in the prior art, and the wheel dolly can be downsized.

The side view of the wheel dolly which shows the Example of this invention. The top view of FIG. The front view seen from the right side of FIG. The rear view seen from the left side of FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. The side view which shows the assembly state of the flame | frame, support | pillar, and connection material in this invention. The front view seen from the right side of FIG. The rear view seen from the left side of FIG. BB sectional drawing in FIG. The top view which shows the accommodation state of the wheel dolly of this invention. The top view which shows the other example of a storage state similarly. The top view which shows the further another example of a storage state similarly. The top view which shows the conventional wheel dolly. CC sectional view taken on the line in FIG. The top view which shows the accommodation state of the wheel dolly of FIG.

Explanation of symbols

1, 1A to 1C Wheel dolly 2, 3 Frame 4, 5 Post 6 Connecting material 7 Space 20, 21 Lifting member 27, 28 Support arm H1 Space height H2 Frame height H3 Arm height L1 Left-right direction of space Length L2 Inner spacing of support arm

Claims (3)

  It has a pair of frames arranged on both sides, a support column erected on the rear part of the pair of frames, a connecting member erected between the support columns, and a pair of support arms that can be raised and lowered on both columns. It is a wheel dolly, and a space from the floor surface is provided in the front-rear direction below the connecting material, and the space is provided in the front-rear direction with the frame on one side and the support arm on one side lowered. A wheel dolly characterized by being sized to be inserted.   The height from the floor surface of the space is set higher than the height from the floor surface of the upper surface of the frame and the height from the floor surface of the upper surface of the lowered support arm, and the horizontal length of the space is The wheel dolly according to claim 1, wherein the wheel dolly is set to be substantially equal to or more than an inner distance between both support arms.   The pair of frames and the connecting member are arranged in a U shape when viewed from above, the pair of frames are parallel to each other, and the both support arms are arranged in parallel to the pair of frames. Wheel dolly.

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