JPH092008A - Wheel dolly - Google Patents

Abstract

PURPOSE: To balance a support base and lift or lower it with slight force by exciting the support base with an elastic body towed by the elastic force nearly equal to the tire wheel weight. CONSTITUTION: A wheel dolly D1 moved to the tire wheel T2 portion of a wheel lifted up, and an operation handle 15 is pushed down to move a lower support base B2 below the tire wheel T2 . When the operation handle 15 is released, the support base B 2 is towed by the elastic force of an elastic body 9, and it is automatically returned into contact with the lower side of the tire wheel T2 to support it from below. When the tire wheel T2 is removed from the vehicle, the weight of the tire wheel T2 is loaded to the support base B2 as it is. Since the elastic force of the elastic body 9 is set to a value nearly equal to the tire wheel weight in advance, the tire wheel T2 is stopped at an optional position with good balance. When a worker pushes down the tire wheel T2 with slight force, it can be easily moved to a lower position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel dolly used for attaching / detaching a tire / wheel to / from a vehicle.

[0002]

2. Description of the Related Art When inspecting or servicing a vehicle, lift up the vehicle, remove the tires and wheels, perform the desired inspection and maintenance work in this state, and then attach the tires and wheels again. I often bring it back. In this case, if the tires / wheels are detached and attached manually, a great deal of heavy labor is required, and sometimes it is impossible with manual labor. Because the actual lift-up height of the vehicle is quite high, even up to the chest of the operator, and the tires and wheels themselves are quite heavy, even for a small vehicle, it will be about 20 kg, This is because heavy-duty vehicles such as trucks and buses are particularly heavy and may not be manually available.

For this reason, conventionally, a wheel dolly has been proposed as a device used when attaching and detaching a tire / wheel. This wheel dolly is generally constructed by assembling a support platform for supporting and lifting tires and wheels through a lifting mechanism on a carriage or a movable body similar to the carriage that can freely move on the floor surface. When using the wheel dolly, carry the wheel dolly under the tires / wheels of the lifted vehicle, raise the support base by the elevating means to support the target tire / wheel, and receive it from the vehicle side. After that, the support base is lowered to move the wheel dolly itself together with the tires and wheels to a place where it does not interfere with the work. After that, when the desired work such as inspection and maintenance is completed, the wheel dolly is again guided below the axle (wheel mounting part) of the lifted vehicle, and the support base is lifted by the lifting means, and the target tire / wheel is reached. Is supported and delivered to the vehicle side. When attaching and detaching the tires and wheels, the support base is naturally raised and lowered by the raising and lowering means, but in the past, this raising and lowering was performed using a hydraulic mechanism or an electric mechanism, or in conjunction with a gear mechanism or a manual pump. I used to manually operate the handle lever.

[0004]

However, in a wheel dolly that raises and lowers the support table by using a hydraulic mechanism or an electric mechanism, it is not only difficult to reduce the cost of the device itself, but also
Hydraulic hoses, pipes, power cords, etc. were required, which hindered them when moving, and had problems such as limited movement range.

On the other hand, in the wheel dolly in which the support base is raised and lowered by manually rotating the handle lever and the like, the cost of the device itself can be reduced, but when the raising and lowering process becomes longer (higher), the handle lever and the like are moved. The number of operation revolutions increases, which is quite troublesome, and at the same time, it takes time and work efficiency is unavoidably deteriorated. For this reason, in the case of a small vehicle tire / wheel (with a weight of about 20 kg) that can be handled manually, if the working position is high, the operator feels troublesome and this kind of wheel dolly is used. The reality was that they didn't use much. However, in the case of manual work, even a tire / wheel of about 20 kg is a heavy object and causes back pain for the worker.

Further, the conventional wheel dolly, whether using the hydraulic mechanism or the electric mechanism, or of the manual type, is of a type in which one tire / wheel is placed, and therefore it is more preferable. A number of wheel dollies corresponding to the number of tires and wheels are required, and there is a problem in that a large storage space is required when using as well as when not using. On the other hand, if the number of wheel dollies is less than the number of tires / wheels, there is a troublesome problem that the tires / wheels that have been received must be emptied from one wheel dolly and then reused.

The present invention has been made in view of the above-mentioned conventional circumstances, and is basically of a manual type and inexpensive structure, and one tire wheel has two tires and wheels. It is intended to provide a wheel dolly that is also compatible with.

[0008]

The basic means (construction) of a wheel dolly according to the present invention is a base pedestal capable of freely moving on the floor surface, and an elevating means assembled on the base pedestal. A support base for supporting and elevating the tire / wheel that is vertically moved by the elevating means, and an elastic body for pulling the support base through the elevating means with an elastic force substantially equal to the weight of the tire / wheel, When the tire / wheel is placed on the support base, the support base is designed to be able to move up and down with a small external force in almost equilibrium with the elastic force of the elastic body. The purpose is to equip two sets of lifting means and a support stand so that the tires and wheels can be placed vertically in two stages.

[0009]

According to this structure, since the support base is biased by the elastic body (spring) that is pulled by the elastic force substantially equal to the weight of the tire / wheel, the support base on which the tire / wheel is mounted is balanced, It is possible to raise and lower with a little force. Also, if two sets of raising and lowering means and a support stand are provided on the base stand, respectively, the number of units can be reduced.
It will be possible to support all tires and wheels.

[0010]

1 to 3 show an embodiment of a wheel dolly according to the present invention. This wheel dolly D ₁ is equipped with two sets of lifting means A _{1 to} A ₂ and support bases B _{1 to} B ₂ on the base pedestal _1, and has two tires and wheels T _{1 to} T ₂ . It is designed so that it can be placed in two upper and lower stages.

The base pedestal 1 is composed of a dolly having rotating rollers (casters) 2 at the four corners on the bottom surface, and two struts 3 and 3 are appropriately spaced near one edge on the trolley. It is set upright. Then, on each of the columns 3 and 3, there is a cylindrical first slider 4a, 4a and a second slider 4b, 4b.
Is slidably and vertically fitted in two stages, and is preferably connected between the first sliders 4a and 4a between the columns 3 and 3 and between the second sliders 4b and 4b. The plates 5 and 5 are connected and integrated. The first sliders 4a, 4a and the second sliders 4b, 4b fitted in the two columns 3, 3 respectively constitute two sets of elevating means A ₁ -A ₂ .

The support bases B ₁ -B ₂ are provided with the lifting means A.
_Two horizontal bar members 6 fixed to the first sliders 4a, 4a and the second sliders 4b, 4b of _{1 to} A ₂ respectively.
a, 6a and 6b, consists 6b, each of these bars members 6a, 6a and 6b, the distance between 6b, when placing the tire wheel T ₁ through T _2, the tires and wheels T ₁ ~ The lower side of T ₂ is slightly depressed to provide a stable interval. Here, each horizontal bar member 6a, 6a and 6b, 6b
It is preferable to fix the lateral plate plates 7, 7 between the tips of the plates, preferably as a reinforcing member for preventing wheel separation.
Wheel bases 8, 8 having, for example, an inverted U shape may be provided at the bases of the upper horizontal bar members 6a, 6a and the intermediate portions of the lower horizontal bar members 6b, 6b.

On the other hand, an elastic force substantially equal to the weight of the tire / wheel (more accurately, the average weight of the tire / wheel) is applied to each of the supporting bases B _{1 to} B ₂ via the elevating means A _{1 to} A _2. Then, the elastic body (spring) 9 for pulling the support bases B _{1 to} B ₂ is energized. The elastic body 9 is preferably a constant load spring whose elastic force does not change due to its displacement, and may be, for example, one having a structure as shown in FIG. In this case, the band-shaped elastic body 9 is wound around the drum 10 so that it can be pulled out. In this embodiment, the drum 10 is attached to the upper ends of the two columns 3 and 3 in two upper and lower stages. There is. More specifically, the shaft pin 11 is attached via a bracket 12 that supports the drum 10 (this point is omitted in FIGS. 1 and 2). A box-shaped case 13 is put on the upper ends of the columns 3 and the lower end side (free end side) of each elastic body 9 is fixed by, for example, a fixing screw 14 shown in FIG.
The first slider 4a, 4a and the second slider 4
It is attached to the rear surface side of b and 4b.

Therefore, the tires and wheels T ₁ -T ₂
Each support stand B ₁
˜B ₂ are the first sliders 4a of the ascending / descending means A ₁ ˜A ₂ ,
4A and the second sliders 4b, 4b are pulled by the elastic force of the elastic body 9 which is quite strong, so that, for example, as shown by the broken line in FIG. It is supposed to be in a suspended state. Further, an operation handle (lever) 15 for manually raising and lowering each of the first sliders 4a, 4a and the second sliders 4b, 4b is attached to a side surface side or a rear surface side thereof.

Wheel dolly D constructed in this way
_{In the} case where _two tire wheels T _{1 to} T ₂ (for example, two left and right front and rear, or two front and rear front and rear) are sequentially removed from the lifted vehicle by ₁ , You can do it like this. First, the wheel dolly D ₁ is moved to the tire / wheel T ₂ portion of the lifted vehicle, and the lower support base B ₂ which has been in the upper position until then is pushed down by the operation handle 15 to move the tire / wheel T _2. If it is put under T ₂ and then the operating handle 15 is released, the support base B ₂ is automatically returned by the pulling by the elastic force of the elastic body 9,
Abut the lower side of the wheel T ₂ and
Support ₂ from below. In this state, by removing the tires and wheels T ₂ from the vehicle, but not the weight of the tire wheel T ₂ is loaded directly to the support base B _2, the elastic force in advance tire wheel weight of the elastic body 9 Since it is set to a value almost equal to, it is just balanced and stopped at an arbitrary position. Therefore, if the worker pushes down with a slight force, it can be easily moved to, for example, the lower position shown by the solid line in FIG. 2 (a stable storage position near the lower side). Next, in order to place another tire / wheel T ₁ on the vacant upper stage pedestal B ₁ , the same procedure as described above may be performed.

In this way, the wheel dolly D ₁ on which the _two tires and wheels T ₁ -T ₂ are placed can be moved to an appropriate place until the desired inspection and maintenance work is completed. Good. In this case, one wheel dolly D ₁ can cope with _two tires and wheels T _{1 to} T ₂ , and even four tires and wheels can have two wheel dollies D _1. This can be done, and a large space saving is possible.

After the desired work is completed, the above 2
In order to return and attach the individual tires / wheels T _{1 to} T ₂ to the vehicle side, the following steps may be performed. First, in the same manner as above, the wheel dolly D ₁ is carried under the axle (wheel mounting portion) of the lifted vehicle, and the upper stage support base B ₁ which has been in the lower position until then is operated. It suffices to pull up the operating handle 15 to raise it to the axle side of the vehicle, and then release the operating handle 15. Then, at that position, for the time being, tires
The support base B ₁ on which the wheel T ₁ is placed is balanced and stopped. In this state, the operating handle 15 and tires
A slight external force may be applied to the wheel T ₁ itself to finely adjust the axle side attachment bolt and the tire / wheel T ₁ attachment hole for positioning. This allows easy and quick mounting. Next, the lower support B ₂
The same applies to the tire / wheel T ₂ mounted on the vehicle.

FIG. 5 shows another embodiment of the wheel dolly D _{2 according to the} present invention.
Is made to be equipped on the base platform unit 1 and each one set lifting means A ₁ of the support base B _1, simplification of a more thorough structure is achieved. Also in the case of this wheel dolly D ₂ , although one set of lifting means A ₁ and support base B ₁ can accommodate only _one tire / wheel T ₁ mounted, the action, effect, etc. are the same as those of the wheel dolly. D ₁
Is almost the same as.

FIG. 6 shows still another embodiment of the wheel dolly according to the present invention. This wheel dolly D ₃ comprises a set of a link mechanism on a base pedestal 1 made of a frame. The ascending / descending means A ₃ is assembled, and a support base B ₃ composed of two horizontal bar members 6c, 6 is provided at the upper end of the ascending / descending means A ₃ in the frame 21. Here, the elevating means A ₃ pivots two frame members 22a, 22b on the left and right respectively in an X-shape at substantially middle portions thereof, and also sets one frame member 22b, 2b for each pair.
Only the lower end of 2b is a free end (free), and while the rotary rollers 23, 23 are provided in this portion, the rotary roller 2
A rail portion 24 in which 3, 23 are provided inside the base stand portion 1,
As shown in FIG. 4, the supporting base B ₃ is mounted between the shaft 25 of the rotating rollers 23 and 23 and the base 1 by elastic force substantially equal to the weight of the tire / wheel. An elastic body 9 to be pulled is energized.

Therefore, in this wheel dolly D ₃ , the traction by the elastic force of the elastic body 9 causes the two X-shaped X-shaped portions on the left and right of the elevating means A ₃ when the tire / wheel is not placed and free of load. Frame members 22a, 22
Since b is closed, the support base B ₃ including the two horizontal bar members 6c and 6 is always in a high position in which it is pushed up.

Even when the wheel dolly D ₃ is used, as in the case of the wheel dollies D _{1 to} D ₂ , when the tire / wheel is removed from the lifted vehicle, the wheel / dolly D ₃ is moved to the tire / wheel portion. And let
It suffices to push down the upper frame frame 21 portion or the like in the state of the high position to put it in the lower side of the tire / wheel, and then release the pushing. That way, support B
₃ automatically returns by being pulled by the elastic force of the elastic body 9, contacts the lower side of the tire / wheel, and supports the tire / wheel from the lower side. In this state, tires
When the wheel is removed from the vehicle, the weight of the tire / wheel is exactly balanced with the pulling by the elastic force of the elastic body 9, so that the support base B ₃ is stopped at an appropriate height position.
This stop position can be changed by applying a slight external force. On the contrary, in order to attach the removed tire / wheel back to the vehicle side, the wheel dolly D ₃ is carried under the axle (wheel mounting portion) portion of the lifted vehicle, and the balance is lowered to that point. The supporting base B ₃ that is being operated may be lifted up to the axle side of the vehicle, and then separated. Then, at that position, the support base B ₃ on which the tires and wheels are placed is balanced and stopped. In this state, apply a slight external force to the tire / wheel itself,
It suffices to make fine adjustments to the mounting bolts on the axle side and the mounting holes of the tire / wheel T ₁ to position them. This also allows easy and quick mounting.

[0022]

As is apparent from the above description, the wheel dolly according to the present invention has the following effects. (1) First, since it is a manual type that does not require a hydraulic mechanism or an electric mechanism, the cost of the apparatus itself can be reduced.
Of course, since there is no hydraulic hose, piping, power cord, etc., the movement is smooth, and the movement range is not particularly limited. (2) Next, the support base on which the tires and wheels are mounted is
Since the structure balances the elastic force of the elastic body, there is no need to manually support when attaching or detaching tires and wheels.
Since it can be freely stopped at any position with a slight force, it is possible to easily deal with fine adjustments and obtain good usability. Furthermore, even if the lifting process is long (high),
Since a small amount of force can be applied as described above, even a small vehicle tire / wheel (having a weight of about 20 kg) can be expected to be used, and the back pain of an operator can be eliminated. (3) Further, if two sets of raising and lowering means and a support base are provided, the tires and wheels can be placed in two stages, one above the other, so that a small number of tires and wheels can be used for all the tires and wheels. As a result, the equipment cost can be reduced and the storage space can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a wheel dolly according to the present invention.

2 is a side view of the wheel dolly of FIG. 1. FIG.

3 is a front view of the wheel dolly of FIG. 1. FIG.

FIG. 4 is a perspective view showing an example of an elastic body used in the wheel dolly of the present invention.

FIG. 5 is a perspective view showing another embodiment of the wheel dolly according to the present invention.

FIG. 6 is a perspective view showing another embodiment of the wheel dolly according to the present invention.

[Explanation of symbols]

A _{1 to} A ₃ lifting means B _{1 to} B ₃ support stand D _{1 to} D ₃ wheel dolly T _{1 to} T ₂ tire / wheel 1 base stand portion 2 rotating roller 3 support post 4a first slider 4b second slider 6a to 6c Horizontal bar member 7 Horizontal plate plate 8 Wheel receiver 9 Elastic body 21 Frame frame 22a-22b Frame member 23 Rotating roller 24 Rail part

Claims (2)

[Claims] 1. A base unit which can freely move on the floor surface,
Elevating means assembled on the base pedestal part, a support base for supporting and elevating the tire wheel vertically moved by the elevating means, and elasticity of the support base substantially equal to the weight of the tire wheel via the elevating means. When the tire / wheel is placed on the support base by being urged by an elastic body that is pulled by force, the support base can be lifted and lowered with a small external force substantially in balance with the elastic force of the elastic body. Wheel dolly featuring. 2. A tire wheel can be mounted in two upper and lower stages by mounting two sets of elevating means and a supporting base on each of the base pedestals.
Wheel dolly shown.