JPH08318703A - Auxiliary tool for tire replacement - Google Patents

Abstract

PURPOSE: To maintain a tire to a desired height accurately and move the tire to front/rear and right/left easily. CONSTITUTION: In an auxiliary tool for tire replacement, two casters 19A-19D are fixed on respective both end parts of a first support frame 11 and a second support frame 12 and a first support roller 34 and a second support roller 35 are connected turnably to respective a pair of upward vertical pieces 11A, 11B: 12A, 12B formed on the first support frame 11 and the second support frame 12 directly or through links 14-17. It is constituted so that the interval between the first support frame 11 and the second support frame 12 can be changed by the rotation of a handle 26 and the interval between the first support roller 34 and the second support roller 35 or the height of the first support roller 34 and the second support roller 35 can be changed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire changing auxiliary tool applied to the mounting, removal and transportation of automobile tires and wheels.

[0002]

2. Description of the Related Art FIGS. 4 (a) to 4 (c) show a conventional method of replacing tires (including wheels with wheels; hereinafter the same). Car tires (old tires) 1
When the user wants to replace the vehicle, the jack 3 is placed below the vehicle body 2 and the jack 3 is operated to raise the vehicle body 2 to a required height. When the nut is removed from the wheel bolt 6 and the tire 1 is removed, the tire mounting portion 5 and the wheel bolt 6 are exposed as shown in FIG. 4 (b). As shown in Fig. 4 (c), lift the replacement tire (new tire) 7 by hand and attach it to the tire mounting part 5 and the wheel bolt 6 and tighten the nuts to the wheel bolt 6 to fix the replacement tire 7 in place. To do. When mounting the replacement tire 7, the center of the replacement tire 7 is lifted to the center position of the tire mounting portion 5, and the wheel of the replacement tire 7 is rotated so that the bolt holes of the wheel match the wheel bolts 6. It is necessary to move it in the direction of the part 5.

As shown in FIG. 4, when the tire is attached and detached by human hands, a considerable physical burden is imposed on the operator and an accident such as bending of the wheel bolt 6 may occur. In order to solve these problems, a tire replacement auxiliary tool (for example, see Japanese Utility Model Laid-Open No. 2-38202)
Is being considered. In this tire replacement assist tool, guide bars are erected at four corners of a pedestal, a tire receiver is attached to the guide bar so as to be vertically movable, a replacement tire is placed on a roller of the tire receiver, and a tire is moved vertically by a lever. It is a thing. When using this auxiliary tool for exchanging tires, it is difficult to accurately maintain the tire at a predetermined height because the lever is operated by the foot, and it is difficult to move the tire forward, backward, leftward and rightward.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to accurately maintain a tire at a desired height and to easily move the tire forward, backward, leftward and rightward in a tire replacement auxiliary tool.

[0005]

According to the present invention, in a tire replacement assisting tool, two casters (19A, 19B, 19) are provided at both ends of the first supporting frame (11) and the second supporting frame (12).
C, 19D) are fixed and each pair of upward vertical pieces (11A, 1A) formed on the first support frame (11) and the second support frame (12).
1B, 12A, 12B, 58A, 58B, 59A, 59B) is directly or via a link, the first supporting roller (34) and the second supporting roller (35) are rotatably connected, and by the rotation of the handle (26). First
The distance between the support frame (11) and the second support frame (12) is adjusted, and the first support roller (34) and the second support roller (35)
And / or the height of the first supporting roller (34) and the second supporting roller (35) is adjusted. In the description of this configuration, the term “or” includes “and”. In the above configuration, the upward vertical pieces (11A, 11B, 12A, 12B) are arranged at both ends of the first support frame (11) and the second support frame (12), and the first support frame (11) and the second support frame Each downward vertical part of the frame (12)
A mounting hole is formed near the end of (11D, 12D), and a horizontal nut is installed in the mounting hole of the downward vertical part (11D) of the first support frame (11).
The end of (23) is fixed, the guide (24) is fixed in the mounting hole of the downward vertical portion (12D) of the second support frame (12), and the long bolt (25) with a handle (26) is guided ( It is possible to insert it through 24) and screw it into the horizontal nut (23). In the above two configurations, the first link (14) and the second link (1) are attached to the upward vertical pieces (11A, 11B) on both ends of the first support frame (11).
The lower ends of 5) are swingably connected to each other, and the third link (1) is connected to the upward facing vertical pieces (12A, 12B) of both ends of the second support frame (12).
6) and the lower ends of the fourth links (17) are swingably connected, and the central portions of the first link (14) and the third link (16) are swingably connected to each other, and the second links ( 15) and 4th link (17)
The vicinity of each central part is swingably connected to each other, and the first support roller (34) is provided at the upper ends of the first link (14) and the second link (15).
Is rotatably connected, and the third link (16) and the fourth link
The second supporting roller (35) may be connected to the upper end of the (17). In the first configuration, each pair of upward vertical pieces (58A, 58B.59A, 59B) formed on the first support frame (11) and the second support frame (12) has a first pantograph mechanism (50). And the lower ends of the second pantograph mechanism (51) are connected to each other, and the first pantograph mechanism (50) and the second pantograph mechanism (51) are connected.
The first roller support frame is provided on the upper end of the pantograph mechanism (51).
(61) and the second roller support frame (62) are connected to each other, and the first roller support frame (61) and the second roller support frame (62) are connected to the first support roller (34) and the second support roller (3).
5) are rotatably connected to each other, and the first link (54) of each of the first pantograph mechanism (50) and the second pantograph mechanism (51).
B, 54D) and the nuts (36, 37) with L-shaped fittings are connected,
The L-shaped metal fittings (38, 39) are connected to the second links (55B, 55D) of the pantograph mechanism (50) and the second pantograph mechanism (51) respectively, and the long bolt (25) with a handle is connected to the L-shaped metal fittings. (39), L
Nut with bracket (37), L bracket (38), nut with L bracket
Inserted or screwed in the order of (36), the nut with L-shaped fitting (3
An intermediate portion guide (47) may be arranged between the 7) and the L-shaped metal fitting (38).

[0006]

[Operation] First support frame (11) and second support frame (1
Two casters (19A, 19B, 19) on each end of 2).
(C, 19D) is fixed, so put the tire on the first support roller (34) and the second support roller (35), and if you push the tire by hand, move the tire mounted on the tire replacement auxiliary tool. be able to. The distance between the first support frame (11) and the second support frame (12) is adjusted by the rotation of the handle (26), and the distance between the first support roller (34) and the second support roller (35) is adjusted. Since the distance is adjusted, the position of the center of the tire can be moved up and down. When replacing the tire, the tire can be maintained at a desired height, and the tire can be easily removed and attached.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first tire replacement assist tool of the present invention.
FIG. 1 (a) is a perspective view and FIG. 1 (b) is a partial cross-sectional side view showing an embodiment. There is a first support frame 11 and a second support frame 12 formed by bending one plate member, and the upward vertical pieces 11A, 11B, 12A, which are bent upward at both ends of each support frame 11. 12B are formed respectively. The right side surface of the first support frame 11 is formed with a downward vertical portion 11D that is bent downward.
The downward vertical part 12D is bent downward on the left side of 12
Are formed. Downward vertical portion of the first support frame 11
The first support frame 11 and the second support frame 12 are arranged at a desired interval with the lower vertical portion 12D of the second support frame 12 facing each other. Caster mounting holes are formed at both end portions (positions slightly inside the left and right ends) of the horizontal portion 11C of the first support frame 11 and the horizontal portion 12C of the second support frame 12, and the caster 19A is provided in the caster mounting hole.
~ D mounting bolts 20A ~ D are inserted, mounting bolts 20A
~ D to screw nuts 21A ~ D, the first support frame 11
The casters 19A to 19D are fixed to the second support frame 12. The caster means a wheel whose moving direction can be freely changed.

Mounting holes are provided in the vicinity of each end of the downward vertical portion 11D of the first support frame 11 and the downward vertical portion 12D of the second support frame 12 (position adjacent to the caster 19B when viewed from the left in FIG. 1 (a)). And the small diameter portion of the end portion of the horizontal nut 23 is fitted and fixed in the mounting hole of the downward vertical portion 11D from the right side. From the right side, a cylindrical guide 24 is aligned and fixed in a mounting hole of the downward vertical portion 12D, and a long bolt 25 with a handle 26 is inserted through the guide 24 and screwed into a horizontal nut 23. The support frame interval adjusting mechanism 22 thus configured connects the first support frame 11 and the second support frame 12, and the handle 26 of the support frame interval adjusting mechanism 22 is connected.
The space between the first support frame 11 and the second support frame 12 can be adjusted by rotating. In addition,
The operation handle is connected to the first support frame 11 or the second support frame 12, and the operation handle is held in the hand and caster
It is possible to move the tire replacement assist tool with 19A to 19D.

Bending the tip of the elongated plate at a right angle,
A first guide stay 40 having an elongated guide groove 43 formed at the rear end thereof.
Also, the second guide stay 41 is prepared, and the first guide stay 40 and the second guide stay 41 are provided at both ends of the downward facing vertical portion 11D of the first support frame 11.
The bent portions of the guide stays 41 are fixed by welding or the like. Two guide pins 45 at predetermined intervals are fixed to both ends of the horizontal portion 12C of the second support frame 12 by welding or the like toward the outside, and guide grooves of the first guide stay 40 and the second guide stay 41 are formed. 43 and two guide pins 45 are engaged with each other. A head may be formed on the guide pin 45 so that the engagement between the two guide pins 45 and the guide groove 43 is not released. First
The guide stay 40 and the second guide stay 41 are provided with long bolts 25 when the tire is mounted on the tire exchange assisting tool as described later.
The long bolt 25 is arranged so as to prevent the long bolt 25 from being bent by a bending moment. Long bolt
When the strength of 25 is sufficient, it is not necessary to dispose the first guide stay 40 and the second guide stay 41.

An upward vertical piece 11A of the first support frame 11
Upward vertical pieces 11A and 12B and the second support frame 12
Link mounting holes are formed in the link mounting holes at the lower ends of the links 14 to 17 and align with the bolts 28.
Is inserted and the nut is screwed. A central bolt hole is formed in the vicinity of the central portion of each of the links 14 to 17 (a position slightly lower than the central portion), and the central bolt hole of the first link 14 and the central bolt hole of the third link 16 are aligned and the bolt 29. Is inserted and the nut is screwed. Similarly, align the central bolt hole of the second link 15 and the central bolt hole of the fourth link 17 with the bolt 30.
Is inserted and the nut is screwed. The first link 14 and the third link 16 can swing around the bolt 29, and similarly, the second link 15 and the fourth link 17 can swing around the bolt 30.

Support holes are formed in the upper ends of the links 14 to 17, and bolt portions at both ends of the rod-shaped first support member 32 are provided in the support holes of the first link 14 and the second link 15, respectively. It is inserted, and the nut is screwed and fixed to the bolt part. First
The support member 32 rotatably supports the first support roller 34 via a bearing (not shown). Similarly, a rod-shaped second support member is formed in the support hole of the third link 16 and the support hole of the fourth link 17, respectively.
The bolts at both ends of 33 are inserted, and nuts are screwed and fixed to the bolts. The second support member 33 rotatably supports the second support roller 35 via a bearing (not shown), and
A tire is rotatably mounted on the support roller 34 and the second support roller 35. When the tire is kept in a low position, the handle 26, the guide 24, the long bolt 25, and the horizontal bolt 23, long bolt 25
The horizontal nut 23 is the first support frame 11 and the second support frame.
The lengths of the first support frame 11 and the second support frame 12 are set to a predetermined value, which are arranged in the vicinity of the ends of 12.

Next, the first tire replacement assist tool of the present invention will be described.
The operation of the embodiment will be described. When it is desired to replace the tire 1 (old tire) of the automobile, the jack 3 is placed below the vehicle body 2 and the jack 3 is operated to raise the vehicle body 2 to a required height. The tire exchanging auxiliary tool of the first embodiment is moved to the lower side of the tire 1, the handle 26 is rotated, and the first supporting roller 34 and the second supporting roller 35 are raised, and the tire 1
Lift a little. Remove the nut from the wheel bolt 6 and move the tire replacement auxiliary tool in parallel with the wheel bolt 6 to remove the tire 1. Carry the tire 1 on the tire replacement auxiliary tool while transporting it to the specified position, and replace the tire 7
The (new tire) is placed on the tire replacement auxiliary tool and moved to the mounting position of the replacement tire 7. Rotate the handle 26 to first
The heights of the support roller 34 and the second support roller 35 are adjusted so that the center height of the tire mounting portion 5 and the center height of the replacement tire 7 match. Rotate the replacement tire 7 by putting your hand on the replacement tire 7 and insert the wheel bolt hole into the wheel bolt 6
The tire replacement auxiliary tool is made parallel to the wheel bolts 6 and brought closer to the tire mounting portion 5 by aligning them with each other. The wheel bolt 6 is inserted through the bolt hole of the wheel, the replacement tire 7 is attached to the tire mounting portion 5, the nut is tightened to the wheel bolt 6, and the replacement tire 7 is fixed at a fixed position. The handle 26 is rotated to lower the first support roller 34 and the second support roller 35, and the tire replacement auxiliary tool is moved to a predetermined storage place. The jack 3 is operated to return the vehicle body 2 to the traveling position, and the jack 3 is moved to a predetermined storage place. In this way, the tire replacement work is completed.

FIG. 2 shows a second embodiment of the tire changing auxiliary tool of the present invention. 2 (a) is a perspective view, FIG. 2 (b) is a partial sectional side view, FIG. 2 (c) is a plan view of the height adjusting mechanism, and FIG. 2 (d) is a side view of the guide stay. It is a figure. Second
In the embodiments, the same parts as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted or simplified. In the second embodiment, flat plate-like members are used as the first support frame 11 and the second support frame 12, and the first support roller 34
The second support roller 35 and the first support frame 11 and the second support frame 12 are connected by a first pandagraph mechanism 50 and a second pantograph mechanism 51, respectively. A height adjusting mechanism 48 including a handle and a long bolt is connected to a first pandagraph mechanism 50 and a second pantograph mechanism 51.

Flat and horizontal first support frame 11 and second
Casters 19A to 19D are firstly provided at both ends of the support frame 12.
The first mounting bracket 58 and the second mounting bracket 59, which are U-shaped in cross section, are fixed to the upper surfaces of the central portions of the first supporting frame 11 and the second supporting frame 12 by welding or the like. Upward vertical pieces 58A and 58B are formed on both ends of the first mounting member 58, and the upward vertical pieces 58A and 58B are provided with a fifth piece.
Link 54A, 6th link 55A and 5th link 54B, 6th
The lower ends of the links 55B are rotatably connected to each other. The upper ends of the fifth links 54A and 54B are rotatably connected to the lower ends of the seventh links 56A and 56B by connecting bars 60A, and similarly, the upper ends of the sixth links 55A and 55B are the eighth links 57.
The lower ends of the A and 57B are rotatably connected by a connecting bar 60B. The upper ends of the seventh link 56A / eighth link 57A and the seventh link 56B / eighth link 57B are rotatably connected to the downward vertical pieces 63A and 63B of the third mounting bracket 63 having a U-shaped cross section, respectively. Pandagraph mechanism 50
Is configured. The second pantograph mechanism 51 includes the upward vertical pieces 59A and 59B of the second mounting bracket 59 and the fifth links 54C and 54.
D, 6th link 55C / 55D, 7th link 56C / 56D, 8th link 57C / 57D, connecting bar 60C / 60D, 4th mounting bracket 64 downward vertical piece 64A / 64B, using the 1st panda graph mechanism It is constructed in the same way as 50.

The third mounting member 63 and the fourth mounting member 64 are formed by a first roller supporting frame 61 and a second roller supporting frame 62.
Is fixed to the central portion of the lower surface of the roller by welding or the like, and is a vertical end piece of the first roller support frame 61 and the second roller support frame 62.
Both ends of the rod-shaped first support member 32 and the second support member 33 are fixed to the 61A / 61B and the end vertical pieces 62A / 62B in the same manner as in the first embodiment. The first supporting member 32 and the second supporting member 33 are connected to the first supporting roller 34 and the second supporting member 34 via bearings (not shown).
The support roller 35 is rotatably supported.

The height adjusting mechanism 48 is a first panda graph mechanism 50.
And disposed inside the link of the second panda graph mechanism 51. The mounting surfaces of the first L-shaped metal fitting nut 36 and the second L-shaped metal fitting nut 37 are rotatably connected to the vicinity of the upper ends of the fifth link 54B and the fifth link 54D by bolts and nuts (not shown). The mounting surfaces of the metal fitting 38 and the second L-shaped metal fitting 39 are rotatably connected to the vicinity of the upper ends of the sixth link 55B and the sixth link 55D by bolts and nuts (not shown) (FIGS. 2 (b) and (c)). )). An intermediate portion guide 47 having a predetermined length L is arranged between the first L-shaped metal fitting 38 and the second L-shaped metal fitting nut 37 so that the distance between the first L-shaped metal fitting 38 and the second L-shaped metal fitting nut 37 is not a predetermined distance. , Long bolt 25 with handle 26 on guide 24
Through. Insert the long bolt 25 into the second L-shaped metal fitting 39, screw it into the second L-shaped metal fitting nut 37, insert it into the first L-shaped metal fitting 38, and screw it into the first L-shaped metal fitting nut 36, as shown in FIG. 2 (c). The state shown. When the handle 26 is rotated in the forward direction, the second
The distance between the L-shaped metal fitting nut 37 and the second L-shaped metal fitting 39 and the distance between the first L-shaped metal fitting 38 and the first L-shaped metal fitting nut 36 are reduced at the same rate, so that the first panda graph mechanism 50 and the second panda graph mechanism 51 are The first support roller 34 and the second support roller 35 rise at the same rate as they extend at the same rate. Handle on the contrary
When 26 is rotated in the negative direction, the first panda graph mechanism 50 and the second panda graph mechanism 51 contract at the same rate, and the first support roller 34 and the second support roller 35 descend at the same rate.

Although not shown in FIGS. 2 (a) and 2 (b), the guide stay 42A (42B) shown in FIG. 2 (d) is linked to the first panda graph mechanism 50 and the second panda graph mechanism 51. It is placed on the outer side of and at the same height as the long bolt 25. The guide stay 42A (42B) is an elongated metal plate in which three guide grooves 43A to 43C having a predetermined length are formed.
The tips (left end in the figure) of 42A and 42B are not shown near the upper end of the fifth link 54A (front in FIG. 2 (a)) and near the upper end of the fifth link 54B (back in FIG. 2 (a)). It is rotatably connected by bolts and nuts. As shown in FIG. 2A, the sixth link 55A, the fifth link 54C, and the sixth link 55
One guide pin 44A to 44C is provided in the vicinity of the upper end portion of C (on the front side in FIG. 2A), and the guide pins 44A to 44C are engaged with the guide grooves 43A to 43C of the guide stay 42A, respectively. . Similarly, one guide pin is provided in the vicinity of the upper ends of the sixth link 55B, the fifth link 54D, and the sixth link 55D (rear surface in FIG. 2A), and the guide stays 42 are provided on the respective guide pins.
The B guide grooves 43A to 43C are engaged with each other. Tires can be placed on the first support roller 34 and the second support roller 35, and the tire replacement assist tool of the second embodiment can be used in the same manner as in the first embodiment.

FIG. 3 shows a third embodiment of the tire changing auxiliary tool of the present invention. 3 (a) is a perspective view, and FIG. 3 (b) is a partial cross-sectional side view. In the third embodiment, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted or simplified. In the third embodiment, each of the links 14 to 17 of the first embodiment is removed from the link mounting holes of the upward facing vertical pieces 11A, 11B, 12A, and 12B of the first support frame 11 and the second support frame 12, and the links are mounted. First support roller in hole
This is equivalent to one in which 34 and the second support roller 35 are attached.

Upward vertical piece of the end of the first support frame 11.
Roller mounting holes are formed in the upward facing vertical pieces 12A, 12B of the end portions of 11A, 11B and the second supporting frame 12, and the rod-shaped first supporting member 32 and the second supporting member are formed in these roller mounting holes.
The bolt portions at both ends of 33 are respectively inserted, and nuts are respectively screwed and fixed to the bolt portions. The first support member 32 and the second support member 33 rotatably support the first support roller 34 and the second support roller 35 via a bearing (not shown),
A tire is rotatably mounted on the first support roller 34 and the second support roller 35. Other configurations, such as the support frame interval adjusting mechanism 22, the first guide stay 40 and the second guide stay 4
1, the structure concerning the guide pin 45 and the casters 19A to 19D is the same as that of the first embodiment. When the tire is placed on the first support roller 34 and the second support roller 35 and the handle 26 is rotated, the distance between the first support roller 34 and the second support roller 35 changes, and the height of the center position of the tire increases. The height changes and thus the height of the tire can be adjusted. The tire exchanging auxiliary tool of the third embodiment can be used in the same manner as in the first embodiment.

[0020]

In the tire exchanging auxiliary tool of the present invention, two casters are fixed to both ends of the first supporting frame and the second supporting frame, and a total of four casters make the first tire exchanging auxiliary tool. The tire mounted on the support roller and the second support roller can be pushed by hand and easily moved back and forth and left and right. Further, since the distance between the first supporting roller and the second supporting roller or the height of the first supporting roller and the second supporting roller is adjusted by the rotation of the handle, the first supporting roller and the second supporting roller can be adjusted. The height of the tire mounted on the support roller can be easily and accurately adjusted to maintain the desired height. In addition, since the first support roller and the second support roller are rotatably connected to each other, it is possible to easily adjust the position of the wheel hole of the tire and the wheel bolt at the time of mounting because of the height adjustment. . Therefore, when exchanging tires, the vehicle body is slightly lifted by the jack, the tire exchanging auxiliary tool of the present invention is moved below the old tire, and the handle is rotated to slightly lift the tire. By removing the nut from the wheel bolt and pulling the tire toward you, the tire mounted on the tire exchange assist tool can be easily removed and the tire can be moved to a predetermined place as it is. Next, put the new tire on the tire exchange auxiliary tool, adjust the height of the tire in front of the wheel bolt by rotating the handle, rotate the new tire on the first support roller and the second support roller,
Align the wheel holes of the new tire with the wheel bolts. Push the new tire towards the wheel bolt,
The wheel hole of the new tire engages with the wheel bolt, and the nut is screwed into the wheel bolt to complete the installation of the new tire. As described above, the tire is held by hand only when the old tire is unloaded from the tire exchange assisting tool and when the new tire is placed on the tire exchange assisting tool, and the operator is less physically burdened. Further, in the tire exchange assisting tool of the present invention, the mounting holes are formed near the ends of the downward vertical portions of the first support frame and the second support frame, and the mounting holes of the downward vertical portions of the first support frame are horizontal. An end portion of the nut is fixed, a guide is fixed in a mounting hole in a downward vertical portion of the second support frame, and a long bolt with a handle is inserted into the guide and screwed into a horizontal nut. As described above, since the horizontal nut and the long bolt are attached near the end portions of the first support frame and the second support frame, when the tire is lowered, the horizontal nut and the long bolt should be positioned on the side of the tire. Therefore, the tire can be sufficiently lowered without contacting the horizontal nut and the long bolt.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a tire replacement auxiliary tool of the present invention, FIG. 1 (a) is a perspective view, and FIG. 1 (b) is a partial sectional side view.

FIG. 2 shows a second embodiment of the tire replacement assist tool of the present invention, FIG. 2 (a) is a perspective view, FIG. 2 (b) is a partial sectional side view, and FIG. 2) is a plan view of the height adjusting mechanism, and FIG. 2D is a side view of the guide stay.

3A and 3B show a third embodiment of the tire exchange assisting tool of the present invention, FIG. 3A is a perspective view, and FIG. 3B is a partial sectional side view.

FIG. 4 is an explanatory diagram of a conventional tire changing method.

[Explanation of symbols]

 11 1st support frame 11A, B Upright vertical piece 12 2nd support frame 12A, B Upright vertical piece 19A-D Caster 26 Handle 34 1st support roller 35 2nd support roller 58A, B Upright vertical piece 59A, B Upright vertical piece

Claims (4)

[Claims] 1. Two casters are fixed to both ends of the first support frame and the second support frame, and are directly or linked to each pair of upward vertical pieces formed on the first support frame and the second support frame. The first support roller and the second support roller are rotatably connected to each other via the handle, the distance between the first support frame and the second support frame is adjusted by the rotation of the handle, and the first support roller and the second support roller are connected. The tire replacement auxiliary tool configured such that the distance between the two or the heights of the first support roller and the second support roller are adjusted. 2. An upright vertical piece is arranged at each end of the first support frame and the second support frame, and a mounting hole is formed near the end of each downward vertical part of the first support frame and the second support frame. The end of the horizontal nut is fixed in the mounting hole in the downward vertical portion of the first support frame, the guide is fixed in the mounting hole in the downward vertical portion of the second support frame, and a long bolt with a handle is inserted through the guide to be horizontal. The tire exchanging auxiliary tool according to claim 1, which is screwed to a nut. 3. The upright vertical pieces on both ends of the first supporting frame are swingably connected to the lower ends of the first link and the second link, respectively, and the upper vertical pieces on both ends of the second supporting frame are respectively connected to the upright vertical pieces.
The lower ends of the links and the fourth links are swingably connected, the central portions of the first link and the third link are swingably coupled to each other, and the central portions of the second link and the fourth link are The first support roller is rotatably connected to the upper ends of the first link and the second link, and the second support roller is rotatably connected to the upper ends of the third link and the fourth link. The tire replacement auxiliary tool according to claim 1. 4. The first pantograph mechanism and the second pantograph mechanism are respectively connected to lower ends of the first pantograph mechanism and the second pantograph mechanism, which are respectively connected to the pair of upward vertical pieces formed on the first support frame and the second support frame. A first roller support frame and a second roller support frame are respectively connected to the upper ends of the first roller support frame and the second roller support frame, the first support roller and the second support roller are rotatably connected to the first pantograph. The first pantograph mechanism and the second pantograph mechanism are connected to the first links of the first pantograph mechanism and the second pantograph mechanism, respectively.
An L-shaped metal fitting is connected to each second link of the pantograph mechanism, and a long bolt with a handle is inserted or screwed into the L-shaped metal fitting, the L-shaped metal fitting nut, the L-shaped metal fitting, and the L-shaped metal fitting nut in this order. The tire replacement assist tool according to claim 1, wherein an intermediate portion guide is arranged between the nut with the L-shaped fitting and the L-shaped fitting.