JPH11198601A - Wheel dolly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel dolly which can load in spite of its simplified structure the tires varying in their width highly steadily and in addition is capable of loading an unloading even the tires which are inclined or have obstructions around them with ease. SOLUTION: A pair of L-shaped roller forks 3 are provided at underneath a carriage capable of lifting and lowering, and at the corner of each fork 3 a support 4 in installed as to allow it to swing 90 degrees while a sliding bar 5 is installed slidably in fore and aft direction to the support 4. When double tires are loaded, a carrier 20 is folded into a vertical direction. When a single tire T is loaded, the carrier 20 is laid horizontally so that the tire T is held between a lock section 27 of the sliding bar 5 and a support plate 21 of the support 4. In the meantime, each roller fork 3 can be swang up and down by a cam bar 13 connected to a gear box 6 for use for tilting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel dolly for mounting and transporting tires of various widths.

[0002]

2. Description of the Related Art A conventional wheel dolly will be described with reference to a wheel dolly described in Japanese Utility Model Publication No. 4-46961 and a self-propelled tire dolly described in JP-A-5-330306. The former wheel dolly 50 shown in FIG. 7 has a pair of support arms 51 and a pedestal 52, and a chain 53 and its hook 54. The support arm 51 is provided so as to protrude forward at the lower part of each of the left and right elevating pipes 55 connected at the upper part, has a length equivalent to the width of one tire T, and has a tip facing upward. A stop piece 56 is provided. A receiving stand 52 is provided in the upper front of each of the left and right lifting pipes 55, and a stop hook 54 is provided on the upper side. With such a configuration, the lower portion of the tire T is supported by the support arm 51 and nipped by the stopper 26, and the upper portion is fixed by the chain 53 hooked on the stopper hook 54. As a result, the double tire W as the entire tire is obtained.
Is supported. Here, the cradle 52 is positioned slightly away from the tire T, so that the tire T is supported by the cradle 52 when the double tire W is inclined, so that the double tire W is stabilized. On the other hand, the latter tire dolly 60 shown in FIG. 8 includes a movable frame 61 corresponding to the left and right elevating pipe 55, a roller 62 corresponding to the support arm 51, and a pressing roller 63 attached to the upper center of the movable frame 61. Apart from the possibility of rotation of the mounted tire T, the point that the tire T is directly adhered to the movable frame 61 without providing a receiving stand, and the point that the upper part of the tire T is supported by the pressing roller 61 instead of the chain 53 Only the tire is different from the former in the manner of supporting the tire. The pressing roller 61 is slightly lowered at its tip to protrude forward, and presses the front side around the tire T.

[0003]

However, in the former case, the work of hanging the chain 54 when mounting the tire W is necessary, which is troublesome. Further, tires that can be stably mounted are limited to the tire T having the same width as the length of the support arm or the double tire W including the same. In addition, both
If the tire is tilted, it is difficult to remove the nut that secures the tire to the axle, such as having to hold down the tire on the wheel dolly with one hand and remove the nut with the other hand, and also when installing it Troublesome.
Furthermore, as in the case of mounting a tire from a so-called wide fender vehicle where the fenders are overhanging, there are obstacles around the tires, so the lifting section interferes and the wheel dolly approaches the tire position If this is difficult, it is necessary to remount the tires or remove them once.

[0004] Therefore, the invention according to claims 1 to 4 is:
As it can transport double tires and can also transport single tires stably, it is possible to increase stability in all cases while supporting tires with various widths, and the mounting work is easy, An object of the present invention is to provide a tire support portion of a wheel dolly from which a tire can be placed and pulled out even if there is an obstacle in the vicinity. Further, in addition to the above-mentioned problems, the invention according to claim 5 facilitates the work of attaching and detaching the tire to and from the vehicle, and enables the tire to be transported even in a tilted state, thereby obtaining a wheel dolly that stabilizes the transportation. As an issue.

[0005]

According to a first aspect of the present invention, a pair of left and right roller forks are assembled so as to be able to move up and down along a support standing upright at a rear portion of a bogie. The tire is mounted on the roller fork in a lateral position so that the circumferential surface of the tire is in contact with both roller forks, and can be supported. And a support member for preventing the tilting of the rearward direction by pressing against the side surface facing the rear side.

According to a second aspect of the present invention, in the first aspect, the roller fork has a length corresponding to a width of two tires.

[0007] The invention according to claim 3 is based on claim 1.
In the invention described in the second aspect, the locking member is arranged side by side on each side of each roller fork so as to be rotatable and slidable in the front-rear direction, and can also be locked at an arbitrary position and posture. The slide bar has an L-shaped bent portion.

Further, the invention described in claim 4 is the first invention.
In the inventions described in 1 to 3, the supporter has a length corresponding to one tire, and the storage position is set up substantially vertically with the base end side portion of the roller fork as a fulcrum, and horizontally lowered forward. The supporting member is provided so as to be able to lie up and down with respect to the setting position, and has a support plate at the tip.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the roller fork provided with the locking member and the supporting member is formed by raising and lowering the tip of the roller fork. There is provided a tilt means capable of adjusting the inclination of the fork.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wheel dolly according to the present invention will be described with reference to the drawings. FIG. 1 is a left side view of the tire support of the wheel dolly, and FIG. 2 is a front view of the tire support. The tire support 1 includes a carriage 2, a tilt gear box 6, and a pair of roller forks 3. ,
It is composed of a support 4, a slide bar 5 as a locking tool, and the like.

The carriage 2 includes side plates 10 and 10, connecting plates 11 and 11 which extend in the left-right direction and connect the respective side plates 10, and which are disposed on the upper and lower portions of a rear portion, a fork shaft 12 which is passed over an upper front portion, and a lower rear portion. And the cam bar 13 passed by
A guide roller 1 provided on the back surface of each connecting plate 11 and in the vicinity of each side plate 10 so as to extend between the connecting plates 11 in a vertical direction.
4 and 14 and a chain connecting portion (not shown) provided at the center of the lower connecting plate 11. The cam bar 13 is formed by arranging short columns at both ends of the column, and the column ends are extended to the inside of the tilt gear box 6 and connected thereto. As shown in FIG. 5, the carriage 2 has a pair of columns P having up and down guides (not shown) which are provided upright from a base B having casters K of the wheel dolly D. Each of the guide rollers 14 is fitted therein, and one end of the chain C which is slidably turned back by the chain wheel H at the upper end of the rod R of the cylinder S is fixed to the chain connecting portion of the lower connecting plate 11. Thus, it is supported so as to be movable only in the vertical direction. Here, the other end of the chain C is fixed to the center of a plate M that connects the columns P substantially at the center. The cylinder S is driven by a hydraulic pump O. The rod R is raised by raising the oil pressure by depressing the pedal L, and is lowered by lowering the oil pressure by opening the valve V.

Each roller fork 3 has a tire T
One end of a cylinder (see FIG. 3) having a length corresponding to the width of two tires (double tire W) is formed in an L shape in which one end and a prism edge are connected. A cylindrical roller 16 slidable around the central axis has a shaft insertion hole 17 orthogonal to itself at the other end edge of the prism (fork base 19).
Is provided. Then, the fork shaft 12 of the carriage 2 is inserted into the shaft insertion hole 17, is moved toward each side plate 10 of the carriage 2, and is arranged so that the fork main body 18 is directed in the front-rear direction at a normal position. The two roller forks 3 are arranged so that a common cam bar 13 is brought into contact with the fork base 19 side corner, and the cam bar 13
Pushes the corner of the roller fork 3 so that the fork shaft 1
It can rotate integrally around the two. In addition, each roller fork 3 can independently move in the left-right direction while maintaining its function, and thus can adjust the distance between each other.

Each support member 4 has an L-shaped wide shape with an edge raised and a bent end, and the support member 20 as a long side portion is about half of the roller fork 3 (placement). The length of the support plate 21, which is the short side, is about one third of the radius of the tire T to be mounted. A slide bar insertion portion 22 is provided substantially at the center of the support 20, and a slide bar insertion portion 25 including a leaf spring 23 and a slide bar guide 24 is provided at a corner of the support plate 21. Each support 4 has a base end portion of the support body 20 and a corner of the roller fork 3 pinned, and further has a common spring (not shown) for both.
The support body 20 is provided so as to be able to be raised and lowered freely between a storage position where the support body 20 stands upright and a setting position where the support body 20 is horizontally lowered forward, while being lockable by the action of a spring. In the lock position, the support plate 21 is directed upward and backward, respectively. When the support 20 is retracted, the support plate 21 is locked at the upper end of the fork base 19.

Each of the slide bars 5 is formed by bending the tip of a round bar upward in an L-shape, and the long side of the fork body 18 having a length of about two-thirds is formed by the slide bar body 26 and the support plate 21. A bent tip portion having a similar length is a locking portion 27. The locking portion 27 is slightly bent at substantially the center. A projection 28 is provided near the rear end of the slide bar body 26 side. The attachment to the tire support 1 is performed by inserting the slide bar main body 26 into the two slide bar insertion portions 22 and 25 of the support 4. Here, the locking portion 27 is set to be forward, and the locking portion 27 can be locked and retracted on the front surface of the tire T.
The whole is rotatable around the slide bar main body 26 (see FIG. 2). Further, the projection 28 is located rearward of the slide bar insertion portion 22, and also serves as a stopper by interfering with the slide bar insertion portion 22. 6A, the plate spring 23 is formed by bending a metal plate, and a half of the plate spring 23 is fixed to the support 4 via a slide bar guide 24. The other half is provided with a hole having the same diameter as the slide bar 5. A similar hole is provided below the slide bar guide 24. The slide bar body 26 is passed through these holes.
The slide bar 5 is normally urged upward by the leaf spring 23 to be locked and locked by the slide bar insertion portion 25. It is deformed to reduce the biasing action and to be able to slide. That is, the slide bar 5 can be locked at any position and posture by the slide bar insertion portion 25. The slide is formed along the support 20 by the slide bar guide 24 and the slide bar insertion portion 22.

The tilt gear box 6 includes the carriage 2
And a gear group (not shown), a case 30 for covering them, and a substantially rearward-facing handle 31 for manually operating the gear group. The gear group is meshed at its end with a gear (not shown) provided at the end of the cam bar 13, and while normally supporting the external force sufficiently,
When the handle 31 is rotated, the cam bar 1 operates.
3 is rotated. The cam bar 13 is in contact with the corners of both roller forks 3, and each roller fork 3 is provided with a support 4 having a slide bar 5. Thus, all of these members are integrally rotated. That is, the tilt gear box 6 and the cam bar 13
Corresponds to tilt means.

The wheel dolly D configured as described above
Will be described below. As shown in FIG. 3, a wide tire such as a double tire W is formed by erecting each support 4 in the storage position.
The roller is partially accommodated in the carriage and further abuts against and is supported by each roller fork 3. At this time, since the width of the tire is large, the mounting is sufficiently stable. In addition, about accommodation operation,
Since the slide bar 5 is provided on each of the supports 4 so as to be rotated and accommodated together, it is easy to use only the roller forks 3 as the members for supporting the tires. Since it is sufficiently fixed by the action of the spring and the engagement with the fork base 19, the stored state is not impaired during mounting or transportation.

On the other hand, a normal tire T (single tire)
Is carried out as follows. First, each support 4 is lowered to the setting position. At this time, the slide bar body 26 of each slide bar 5 also follows the fork body 18. This set is easy and firm after setting by the action of the spring. Next, each slide bar 5 is slid so that the distance between the support plate 21 of each support 4 and the locking portion 27 of each slide bar 5 is slightly larger than the width of the tire T to be placed. Further, the locking portion 27 is rotated to the retracted position (see FIG. 2). Such a sliding operation can be performed only by pinching the slide bar insertion portion 25, and is very simple.

Then, the front part of each roller fork 4 is brought close to the lower part of the tire T to be mounted. Here, when the tire T is tilted, the handlebar 31 of the tilt gear box 6 is operated to rotate the cam bar 13 to match the tilt of the tire T with the tilt of each roller fork 3 (see FIG. 4). . This operation is easy because the operation can be performed only by operating the handle 31 at the hand that faces substantially rearward. Subsequently, the carriage 2 is raised to bring the front part of each roller fork 3 into contact with the lower part of the tire peripheral surface. Further, the wheel dolly D is pushed to bring the support plate 21 into contact with the tire T. Thereafter, the slide bar 5 is rotated to set the locking portion 27 to the locking position (see FIG. 2), and the slide bar 5 is pulled to pull the locking portion 27 and the support plate 21.
And the tire T is pinched. The operation of the slide bar 5
It can be formed by pinching the slide bar insertion portion 25 and having the periphery of the projection 28, which can be performed near an operator located behind the wheel dolly D. By this sandwiching, the tire T is firmly supported without falling down even if only the lower part is supported at the front part of each roller fork 3. Also, as long as the width of the tire T is within the nipping range determined by the sliding range, the tire T can be mounted regardless of the width of the tire T.

Thus, the tire T is placed and supported. The operation of each member at this time is, as described above,
Almost everything can be done near the operator and very easily, and is well supported even if the tire T has various widths. Also, unlike the conventional case, since the tire T can be supported at the front of the long roller fork 3, even if there is an obstacle around the tire and the wheel dolly D cannot be pushed all the way, the tire T can be placed, The tire T at the back can be pulled out after removing the nut. Further, the slide bar 5 and the support member 4 are tilted by tilt means including the tilt gear box 6 and the cam bar 13.
Since the roller fork 3 provided with the roller fork 3 is rotatable up and down around a horizontal direction, the tire can be supported and transported with the tip end of the roller fork 3 raised and lowered. Then, even when the tire is tilted with respect to the tire axis due to jack-up or the like, by adjusting the inclination of the roller fork 3, the tire is mounted on the wheel dolly without re-mounting or removing the tire. It can be adjusted to the inclination of the tire shaft, and the tire can be easily attached and detached. Incidentally, if the roller fork 3 is slightly tilted upward during the transport of the tire by the tilt means,
Tires do not try to fall forward.

The configuration and operation of the wheel dolly D described above are merely examples of the embodiment, and can be variously modified as partially exemplified below. The roller fork can be changed to various common forks. The lengths of the support and the slide bar for the fork body are not limited to those described above, and the length may be appropriately adjusted so that the tire is held at the center of the fork, and the tire width may be increased. May be made to be able to perform the pinching operation. The support and the slide bar do not need to be rotated and accommodated in the carriage, but may be accommodated by folding means such as hinges arranged in some places. Alternatively, the slide bar may be used at all times or arbitrarily so that the tire is locked, with the support being stored alone or separately. In this way, when a wide tire (double tire) is mounted, the fall of the tire can be more reliably prevented. The retracting of the locking portion of the slide bar can be performed not only by turning around the front-back direction but also turning around the left-right direction. In this case, it is desirable to provide a spring so as to be able to stand at the end of the slide bar.
As shown in FIG. 6B, the slide bar insertion portion provided with a leaf spring may be a leaf spring 33 having a cylindrical portion at a lower portion and a semi-cylindrical slide bar guide. In this case, the direction in which the urging action is exerted on the slide bar 5 is the left-right direction, but there is no difference from the above in terms of sufficient locking action and operability. The tilt gear box is not limited to manual drive by a gear group. A motor may be provided and the switch may be operated electrically.
The tilt mechanism does not necessarily use a cam bar, but may be a spring mechanism or a hydraulic mechanism arranged between the cam bar and the carriage. The wheel dolly is not limited to the above, and an electric motor can be used instead of a hydraulic pump,
It can be changed as appropriate, such as by manually operating the chain block.

[0021]

According to the wheel dolly according to the first to fourth aspects of the present invention, the provision of the locking tool and the supporting tool enables the sliding and the undulation while making the whole a simple mechanism. A tire having a wide width can be mounted with high stability. Also, since the tire can be placed and supported in front of the fork, the tire can be placed and pulled out even if there is an obstacle around the tire. Further, according to the wheel dolly according to the fifth aspect of the present invention, the tire can be stably mounted and transported by providing the tilt means. In addition, since the roller fork can be aligned with the axis on which the tire is fixed even when the tire is inclined when the tire is attached or detached, the workability is greatly improved, especially for a large vehicle tire. .

[Brief description of the drawings]

FIG. 1 is an explanatory left side view of a tire supporting portion of a wheel dolly according to the present invention.

FIG. 2 is an explanatory front view of a tire support.

FIG. 3 is an explanatory diagram when a double tire is mounted.

FIG. 4 is an explanatory diagram when a tilt gear box is operated.

FIG. 5 is an explanatory rear view of the wheel dolly.

FIG. 6 is an explanatory diagram of a leaf spring.

FIG. 7 is an explanatory diagram of a conventional example.

FIG. 8 is an explanatory diagram of a conventional example.

[Explanation of symbols]

1. tire support, 2. carriage, 3. roller fork, 4. support, 5. slide bar, 6.
Gearbox for tilting, 11 connecting plate, 12 fork shaft, 13 cam bar, 17 shaft insertion hole, 18
..Fork body, 20..support, 21..support plate,
22, 25: slide bar insertion portion, 23, 33: leaf spring, 26: slide bar body, 27: locking portion, C
..Chain, D..wheel dolly, P..post, S
・ ・ Cylinder, T ・ ・ (Single) tire, W ・ ・ Double tire.

Claims (5)

[Claims] 1. A pair of left and right roller forks are protruded forwardly along a column provided at a rear portion of a bogie, and a pair of left and right roller forks is projected forward. A locking device that is mounted on a carriage that can be mounted and supported in a lateral posture so as to be in contact with the roller fork, and a tire mounted on the carriage, which is locked on a side facing forward to prevent tilting forward, A wheel dolly provided with a support that presses against a rearward-facing side surface to prevent tilting backward. 2. The wheel dolly according to claim 1, wherein the roller fork has a length corresponding to a width of two tires. 3. A locking device is provided on a side portion of each roller fork.
The wheel according to claim 1 or 2, wherein the wheel is a slide bar that is rotatable and slidable in the front-rear direction, is also lockable at an arbitrary position and posture, and has an L-shaped bent portion formed at the tip. Doli. 4. A storage position in which the support has a length corresponding to one tire, and stands substantially vertically with the base end side portion of the roller fork as a fulcrum, and a setting position in which the support fork is horizontally lowered forward. 4. The wheel dolly according to claim 1, wherein the wheel dolly is a support having a support plate provided at a tip end thereof. 5. The wheel according to claim 1, wherein the roller fork provided with the locking member and the support member is provided with tilt means capable of adjusting the inclination of the roller fork by raising and lowering the tip of the roller fork. Doli.