JPH0717224A - Vehicle tire replacing device - Google Patents

Abstract

PURPOSE:To provide a tire replacing device with which whoever, even the aged or women, can conduct easily the work of tire attachment and detachment. CONSTITUTION:A tire replacing device is made up of a base frame 10; a movable frame 12; a pair of right and left support rollers 14, 14; a vertical movement operating mechanism 16 and a stopper mechanism 18. Moving casters are fitted to the base frame 10. By conducting the turning operation of an operation lever 56, the movable frame 12 is vertically moved in regard to the base frame 10, and a pair of support rollers 14, 14 that support a tire 64 in a perpendicular posture are made to ascend/descend. By means of a stopper mechanism 18, the movable frame 12 is releasably fixed at a suitable height position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle tire exchanging device used for facilitating the work of removing a tire from a vehicle body or mounting a tire on the vehicle body.

[0002]

2. Description of the Related Art In recent years,
Automobiles have become widespread and the number of elderly and female drivers is increasing. Also, automobiles have become indispensable in business activities. On the other hand, automobiles have made remarkable progress in terms of performance, and failures have almost never occurred. However, tires are consumable items and need to be replaced when they become flat or worn. For that reason, spare tires, jacks, and other tools are always provided in the trunk of automobiles. In addition, when the road freezes or snow falls, it is necessary to replace the tire with a type suitable for the weather conditions.

However, tires have a considerable weight, and a considerable amount of force and knack are required for their transportation, installation and removal, and tire replacement work is not easy, especially for elderly people and women. It is annoying. For this reason,
Currently, tires are replaced by gas stations or purchase stores. In addition, if the tire suddenly blows out or snow falls while the vehicle is running, the tire replacement work cannot be performed immediately, resulting in a long time stuck or a great annoyance to other traveling vehicles. It will be.

Despite the above circumstances, conventionally, tools for facilitating tire replacement work have not been generally sold on the market, and even specialists rely on human power to replace tires. Are doing. So, this invention
The purpose of the present invention is to provide a tire exchanging device that allows anyone, such as an elderly person or a woman, to easily remove or install a tire.

[0005]

According to the present invention, a vehicle tire exchanging device is provided with a base portion having moving means for moving on the ground, such as casters and wheels, and a vertical direction on the base portion. A movable frame that is movably held by
At least a pair of left and right bearing rollers, which are rotatably attached to the movable frames, are arranged in parallel with each other and in the same horizontal plane, and on which the vehicle tire is mounted in a vertical posture, and the movable frame. A vertical movement means for vertically moving with respect to the base portion and a fixing means for releasably fixing the movable frame at an appropriate height position are provided.

The vertical moving means can be constructed as follows, for example. That is, the movable frame is formed so as to have a pair of left and right inner frame plates that are parallel to the axial direction of the support roller, and a pair of left and right plates that are arranged close to and parallel to the inner frame plates, respectively. The base portion is formed so as to have the outer frame plate portion. Then, the outer frame plate part and the inner frame plate part are respectively connected in the vertical direction by a pair of link plates, and the outer frame plate part, the inner frame plate part, and the pair of link plates constitute a parallel four-link mechanism. By providing a U-shaped connecting member that extends from each of the left and right front link plates that make up each of the left and right parallel four-link mechanisms and connects the front link plates to each other, and attach the operating lever to this connecting member. , Up-and-down moving means.

[0007]

In order to remove the tire from the vehicle body using the vehicle tire exchanging device configured as described above, first,
The jack is used to lift the vehicle body, and the tire to be removed is slightly lifted from the ground, and then the tire exchanging device is moved to insert a pair of bearing rollers of the movable frame under the tire. Next, the movable frame is moved upward with respect to the base part by the vertical movement means, the pair of support rollers are brought into contact with the tire from below, and the movable frame is fixed at the height position by the fixing means. In this state, loosen the nut that fastens the tire to the vehicle body, and remove the nut from the tire tightening bolt. When the nut comes off, check that there is a gap between the tire tightening bolt and the bolt hole of the tire.If there is no gap, operate the vertical movement means and the fixing means to slightly move the movable frame up and down. , Finely adjust the height of the tire supported on the pair of bearing rollers,
Further, if necessary, after slightly rotating the tire while supporting the tire on the pair of bearing rollers to create a gap between the tire tightening bolt and the bolt hole of the tire,
The tire exchanging device is moved, and the tire exchanging device is pulled out from under the vehicle body with the tire mounted vertically on the pair of bearing rollers of the movable frame. Next, the fixing of the movable frame by the fixing means is released, and the movable frame is moved downward with respect to the base portion by the up-and-down moving means so that the tire supported on the pair of supporting rollers is lowered onto the ground.

On the other hand, in order to attach a tire to a vehicle body by using this vehicle tire exchanging device, the movable frame is lowered to the lowest position by the vertically moving means, and the tire to be attached is vertically supported by a pair of bearing rollers. Place in between.
Next, the movable frame is moved upward with respect to the base portion by the vertical movement means to lift the tire, and the movable frame is fixed at an appropriate height position by the fixing means. Then, move the tire changing device holding the tire to the position of the vehicle body,
The tire moving bolt and the fixing means are operated, and the tire is rotated while the tire is supported on the pair of bearing rollers to align the tire tightening bolt with the bolt hole of the tire. After the alignment is completed, the movable frame is fixed to the base portion by the fixing means. Then, the tire exchanging device is pushed further into the back of the vehicle body, the bolt holes of the tire are fitted into the tire tightening bolts, and then the nuts are screwed into the tire tightening bolts to securely tighten them. When the mounting of the tire on the vehicle body is completed, the fixing of the movable frame by the fixing means is released, the movable frame is lowered to the lowest position by the vertical movement means, and the tire exchanging device is pulled out from under the vehicle body.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention. FIG. 1 is a plan view showing the overall construction of a vehicle tire exchanging device, FIG. 2 is a side view thereof, and FIG. III-I of 1
FIG. 2 is a sectional view taken along line II. This tire changing device includes a base frame 10, a movable frame 12, a pair of left and right supporting rollers 14, 1.
4. It is composed of a vertical movement operation mechanism 16 and a stopper mechanism 18.

The base frame 10 comprises a pair of left and right outer frame plate portions 2
0 and 20 are provided, and a pair of casters 22 and 22 is attached to the front and rear of each outer frame plate portion 20. Movable frame 12
Is constructed by connecting a pair of L-shaped frame plates 24, 24 via a hinge pin 25 so as to be foldable. A bearing roller 14 is rotatably attached to each L-shaped frame plate 24, and the pair of left and right bearing rollers 14 and 14 are arranged parallel to each other and in the same horizontal plane. Also a movable frame
A pair of left and right tire fall prevention members 26, 26 are swingably attached to the frame portion on the front side of the front side 12, and the two tire fall prevention members 26, 26 are connected to each other on the left side L-shaped frame plate 24. And the L-shaped frame plate 24 on the right side are connected to each other by a steel wire for spring 28 inserted through a flexible tube 32 attached so as to straddle the L-shaped frame plate 24 on the right side. Furthermore, an L-shaped frame plate on the left side of the movable frame 12
A stopper portion 30 is integrally formed on the upper left side portion of 24, and the stopper portion 30 is fitted to the upper right end portion of the L-shaped frame plate 24 on the right side so that both L-shaped frame plates 24, 24 are formed. It is designed to be connected to each other. Then, when the pair of L-shaped frame plates 24, 24 of the movable frame 12 are folded through the hinge pins 25, a partially enlarged perspective view of a connecting portion of both L-shaped frame plates 24, 24 viewed from the front side is shown in FIG. As shown in the enlarged views of the parts viewed from the back side in FIG. 5, the stopper portion 30 of the L-shaped frame plate 24 on the left side is disengaged from the upper end of the right end of the L-shaped frame plate 24 on the right side, The sex tube 32 is designed to be curved. Further, although not shown, when the movable frame 12 is completely folded in two, the pair of left and right tire fall prevention members 26, 26 are pulled by the spring steel wire 28 and rotated, so that the pair of movable frames 12 can be rotated. The L-shaped frame plates 24, 24 are drawn into the rear side.

Further, each support roller 14 of the movable frame 12
The inner frame plate parts 34 parallel to the axial direction of the outer frame plate parts 20 of the base frame 10 are arranged in close proximity to the inner frame plate parts 34.
Are connected by a pair of front and rear link plates 36 and 38, respectively. The outer frame plate portion 20 of the base frame 10, the inner frame plate portion 34 of the movable frame 12, and the link plates 36 and 38 are the outer frame plate portion 20 of the base frame 10 and the link plates 36 and 38, respectively. The connecting position of the inner frame plate portion 34 of the movable frame 12 and each link plate 36, 38
Connect the support shafts so that they are above the connection position with
The outer frame plate portion 20 and the inner frame plate portion 34 and the pair of front and rear link plates 3 are rotatably pivotally attached via 40, 42, 44 and 46.
6 and 38 form a parallel four-link mechanism.

On the upper ends of the left and right front link plates 36, 36, L-shaped connecting plates 48, 50 are integrally provided, respectively, as shown in the front view of FIG. And
The left and right connecting plates 48, 50 have their ends connected to each other,
Both connecting plates 48, 50 are U-shaped, and both connecting plates
The front link plates 36, 36 are connected to each other by 48, 50, and the operation lever 56 is attached to the connecting portion of the left and right connecting plates 48, 50. The left and right connecting plates 48, 50 have two cut-and-raised claws 52, 52 formed at the end of the left connecting plate 48 on the right side, as shown in an exploded perspective view of a part of which is enlarged in FIG. After fitting the two U-shaped notches 54, 54 formed in the connecting plate 50, respectively, and superposing both ends thereof, FIG.
As shown in the sectional view taken along the line VII-VII, the left and right connecting plates 4 are formed by a U-shaped holding plate portion 58 formed at the lower end of the operating lever 56.
8 and 50 are connected to each other by sandwiching the overlapped portion at each end. The up-and-down operation mechanism 16 is composed of the pair of front and rear link plates 36 and 38 provided on the left and right sides, the left and right connecting plates 48 and 50, and the operation lever 56. In addition, from the connecting part of the left and right connecting plates 48, 50
After removing 56, each cut-and-raised claw 52 of the left side connecting plate 48 is pulled out from each notch 54 of the right side connecting plate 50, and the left and right connecting plates 48,
By separating 50, the tire exchanging device can be folded in two.

A screw shaft of a screw shaft handle 60 is screwed into the right end portion of the right connecting plate 50, and has a cam surface so as to face the lower end face of the screw shaft of the screw shaft handle 60. The contact member 62 is fixed to the base frame 10. The screw shaft handle 60 held at the right end of the right connecting plate 50 and the contact member 62 fixed to the base frame 10 constitute the stopper mechanism 18.

Next, a working method when the tire is removed and mounted using the tire exchanging device having the above-mentioned structure will be described.

First, a method of removing the tire from the vehicle body will be described. First, the vehicle body is lifted by using a jack and the tire to be removed is lifted from the ground by about 10 mm. Next, with the movable frame 12 lowered to the lowest position as shown in FIGS. 2 and 3 (solid line), the tire exchanging device is moved to move the pair of support rollers 14 supported by the movable frame 12. , 14 under the tire. Next, the operation lever 56 is gripped and pushed down, and the movable frame 12 is moved upward with respect to the base frame 10.
The operation at this time will be described based on the schematic side view shown in FIG. 9. As shown in FIG. 9A, the operation lever 56 is moved from the state where the inner frame plate portion 34 of the movable frame is at the lower position. When is pressed down, the front link plate connected to the operation lever 56
36 and the rear side link plate 38 which is parallel to it rotate counterclockwise with the connecting support shafts 40 and 44 with the outer frame plate portion 20 of the base frame serving as fulcrums while maintaining the parallel state. .
As a result, the inner frame plate portion 34 of the movable frame, which is connected to the lower end portions of the front and rear link plates 36 and 38 via the connection support shafts 42 and 46, moves upward, as shown in FIG. 9B. like,
The inner frame plate portion 34 of the movable frame is lifted.

As described above, the movable frame 12 is moved upward with respect to the base frame 10, and the pair of bearing rollers 14, 14 supported by the movable frame 12 are moved as shown by the two-dot chain line in FIG. After abutting lightly on the tire 64 at the height position indicated by the chain double-dashed line A from below, the screw shaft handle 60 of the stopper mechanism 18 is rotated to contact the abutment member fixed to the base frame 10. Press the lower end surface of the screw shaft handle 60 onto the cam surface of 62. This allows the screw shaft handle 60
The movable frame 12 is fixed at the height position by the pressing force of the screw shaft and the action of the cam surface of the contact member 62. In this state, the nut that fastens the tire 64 to the vehicle body is loosened, and the nut is removed from the tire fastening bolt on the vehicle body side. When the nut comes off, check that there is a gap between the tire tightening bolt and the bolt hole of the tire.If there is no gap, release the fixation by the stopper mechanism 18 while holding the operation lever 56, and move the movable frame. 12 is slightly moved up and down to finely adjust the height of the tire 64 supported on the pair of bearing rollers 14 and 14, and if necessary, to slightly adjust the tire 64 on the pair of bearing rollers 14 and 14. Then, a gap is created between the tire tightening bolt and the bolt hole of the tire. And
Confirm that there is a gap between the tire tightening bolt and the bolt hole of the tire, after fixing the movable frame 12 by the stopper mechanism 18, move the tire changing device, a pair of bearing rollers 14 of the movable frame 12, With the tire 64 mounted vertically on the 14, pull out the tire changing device from under the vehicle. Next, hold the operating lever 56 and
Release the fixation of the movable frame 12 by 18,
12 is moved downward with respect to the base frame 10, and the tire 64 supported on the pair of support rollers 14 and 14 is lowered onto the ground as shown by the chain double-dashed line B. Then, with the tire 64 standing on the ground, by pulling out the tire exchanging device to the front side (the lower side in the drawing of FIG. 1), the tire 64 is disengaged from the tire exchanging device, and the tire 64 is stored. .

Next, in order to attach a tire to the vehicle body using this tire exchanging device, first, the movable frame 12 is lowered to the lowest position, and the tire to be attached is placed on the ground in a standing manner. The rear side (the upper side in the drawing of FIG. 1) of the tire changing device is opposed to the front of the tire, the tire changing device is pushed into the tire, and the tire 64 is arranged between the pair of bearing rollers 14, 14. Next, in a state where the movable frame 12 is released from the stopper mechanism 18, the operating lever 56 is gripped and pushed down, the movable frame 12 is moved upward with respect to the base frame 10, and the tire 64 is lifted. Then, after the movable frame 12 is fixed at an appropriate height position by the stopper mechanism 18, the tire changing device holding the tire 64 is moved to the position of the vehicle body.
Next, while holding the operating lever 56, the fixing by the stopper mechanism 18 is released, the movable frame 12 is slightly moved up and down, and the height position of the tire 64 supported on the pair of bearing rollers 14, 14 is adjusted. Along with fine adjustment, a pair of bearing rollers 14,
By rotating the tire 64 on the tire 14 and adjusting the angular position of the tire 64, the tire tightening bolts on the vehicle body side are aligned with the bolt holes of the tire 64. After the alignment is completed, the movable frame 12 is fixed to the base frame 10 by the stopper mechanism 18. After that, push the tire changer further into the car body, and tighten the tire
After inserting the 64 bolt holes, screw the nuts onto the tire tightening bolts and tighten securely. Tires 64 on the body
After the installation of the
Release the fixation of the movable frame 12 by 18,
Lower 12 to the lowest position and pull out the tire changer from under the vehicle. The tire exchanging device after use, in the structure shown in this embodiment, removes the operating lever 56 from the connecting portion of the left and right connecting plates 48, 50, the cut-and-raised claw 52 of the left connecting plate 48 to the right connecting plate. Left and right connecting plates pulled out from the notch 54 of 50
After separating 48 and 50, the movable frame 12 is folded to fold the entire device in half, and in this state, it is stored in the trunk of the automobile or the like.

It should be noted that the tire exchanging device having the above-described structure is mainly intended for general individuals, and the operation is also performed manually. However, a tire exchanging device for business use or a large-sized tire such as a dump truck. The device for exchanging tires may be an automated device such as an electric type or a hydraulic type. In that case, the configurations of the vertical movement operation mechanism and the stopper mechanism need to be changed to those of the above-mentioned embodiment, and the movement of the tire exchanging device is automated with the increase in weight of the tire and the device itself. There is also a need to do it. In addition, the distance between the pair of bearing rollers supported by the movable frame can be adjusted so that the tires of various diameters can be replaced.

[0020]

Since the present invention is constructed and operates as described above, by using the vehicle tire exchanging device according to the present invention, tires from the vehicle body can be used by anyone such as an elderly driver or a female driver. It will be possible to easily remove and attach the tire to the vehicle body,
There is no longer any need to ask a gas station or purchasing shop to change tires, and even if the tire suddenly blows out while the vehicle is running, or roads get frozen or snow falls, you may get stuck for a long time. It will be possible to avoid situations such as annoying the traveling vehicle. Furthermore, for specialists, and for those who change tires of large vehicles such as dump trucks,
By automating the operation, the labor of the work can be significantly reduced and the time required for the work can be shortened.

[Brief description of drawings]

FIG. 1 is a plan view showing the overall configuration of a vehicle tire exchanging device according to an embodiment of the present invention.

2 is a side view of the device shown in FIG. 1. FIG.

3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a partially enlarged perspective view showing a state in which a movable frame, which is one of the components of the apparatus, is folded, and a connecting portion between both L-shaped frame plates of the movable frame is viewed from the front side.

FIG. 5 is a partially enlarged view of a connecting portion of both L-shaped frame plates of the movable frame as seen from the back side.

FIG. 6 is a front view of the left and right front link plates, the left and right connecting plates, the operation lever, and the stopper mechanism, which are the components of the vertical movement operation mechanism.

7 is a sectional view taken along the line VII-VII of FIG.

FIG. 8 is an exploded perspective view showing enlarged connecting portions of the left and right connecting plates.

FIG. 9 is a schematic side view for explaining an operation when moving the movable frame upward with respect to the base frame.

[Explanation of symbols]

 10 Base frame 12 Movable frame 14 Bearing roller 16 Vertical movement operation mechanism 18 Stopper mechanism 20 Outer frame plate part of base frame 22 Caster 24 L-shaped frame plate 34 Inner frame plate part of movable frame 36, 38 Link plate 40, 42 , 44, 46 Connection shaft 48, 50 Connecting plate 56 Operation lever 60 Screw shaft handle 62 Abutment member 64 Tire

Claims (2)

[Claims] 1. A base unit having a moving means for moving on the ground, a movable frame movably held in the vertical direction on the base unit, and rotatably attached to the movable frame. At least a pair of left and right bearing rollers, which are arranged in parallel with each other and in the same horizontal plane, on which the vehicle tire is mounted in a vertical posture, and a vertically moving means for vertically moving the movable frame with respect to the base portion. And a fixing means for releasably fixing the movable frame at an appropriate height position. 2. The movable frame has a pair of left and right inner frame plate portions parallel to the axial direction of the support roller, and a base portion is arranged close to and parallel to each inner frame plate portion. It has a pair of left and right outer frame plate parts, and the vertical movement means connects the outer frame plate part and the inner frame plate part in the vertical direction, and the outer frame plate part and the inner frame plate part are parallel four links. A pair of front and rear link plates that are provided on each of the left and right sides that make up the mechanism, and a U-shaped connecting member that extends from the left and right front link plates and connects the front link plates to each other, and is attached to this connecting member. The vehicle tire exchanging device according to claim 1, wherein the exchanging lever is provided.