JP7192170B2 - Tire changing device and tire changing unit - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tire changing device and a tire changing unit that assist in changing tires of an automobile.

Conventionally, when a tire of an automobile is worn out, the tire is replaced. In addition, tires are changed from normal tires to studless tires, or from studless tires to normal tires. Generally, when changing a tire, first place a jack under the car body, operate the jack to raise the car body to the required height, remove the wheel nut from the hub bolt, and pull the tire before replacement from the hub. Remove. Next, lift the replacement tire by hand, pass the hub bolt on the axle side through the wheel hole of the tire wheel, temporarily tighten the wheel nut, operate the jack to lower the vehicle, tighten the wheel nut and replace the tire. finish the work.

However, the weight of the tire is as heavy as 18 kg to 22 kg for a normal car tire, and it is difficult to manually lift the replacement tire for tire replacement. In addition, it is difficult to position the wheel hole of the tire wheel at the position of the hub bolt while lifting the heavy replacement tire by hand. Furthermore, if a heavy replacement tire is dropped during tire replacement work, the foot or the like may be injured, so it is necessary to perform tire replacement work in a safer manner. Patent Literature 1 discloses a tire change assist device capable of supporting a replacement tire and assisting tire change. However, the tire change assist device described in Patent Literature 1 has a complicated configuration and a high cost.

Patent No. 4680493

SUMMARY OF THE INVENTION An object of the present invention is to provide a compact tire changing device and a tire changing unit that enable easy and safe tire changing work.

The present invention is a tire changing device that supports a replacement tire for an automobile and assists in changing the tire,
A first support roller having a horizontal direction as a longitudinal direction and parallel to the rotation center line of the replacement tire to be supported;
a second support roller whose longitudinal direction is horizontal and which is parallel to the centerline of rotation of the replacement tire it supports and which, together with the first support roller, positions the tire;
a frame supporting both ends of the first support roller and both ends of the second support roller;
vertical movement means for moving the frame up and down;
frame moving means for horizontally moving the frame;
characterized by comprising

Further, in the tire changing device of the present invention, in the tire changing device,
The frame is
two first support members that support both ends of the first support roller;
two second support members that support both ends of the second support roller;
Two first struts having a vertical direction as a longitudinal direction and having the first support members fixed thereto;
two rod-shaped second struts having a vertical direction as a longitudinal direction and to which the second support members are fixed;
a first horizontal bar fixed between the two first struts;
a second horizontal bar fixed between the two second struts;
a connecting crossbar fixed between one first strut and one second strut;
with
The first support roller, the second support roller, and the frame as a whole are integrally configured to vertically move in parallel.

Further, in the tire changing device of the present invention, in the tire changing device, the substantially cylindrical replacement tire fixed on the first support roller and the second support roller is mounted on two circular side surfaces of the cylindrical shape. and an overturn prevention jig configured to prevent the replacement tire from overturning.

Further, the tire changing apparatus of the present invention is characterized in that, in the tire changing apparatus, the overturn prevention jig is attached to the frame and configured to move up and down together with the frame.

The tire changing unit of the present invention includes a tire changing device that supports a tire to be replaced and assists in changing the tire, and a height of the tire to be replaced when the vehicle to which the tire to be replaced is mounted is jacked up. a height matching fixture configured to match the height of a replacement tire supported by the tire changing apparatus;
The tire changing device
a first support roller having a horizontal direction as a longitudinal direction and parallel to the center line of rotation of the tire to be supported;
a second support roller whose longitudinal direction is horizontal and which is parallel to the centerline of rotation of the tire it supports and which, together with the support roller, positions the tire;
a frame supporting both ends of the first support roller and both ends of the second support roller;
vertical movement means for moving the frame up and down;
a frame moving means for moving the frame in the horizontal direction,
The height matching jig is
height detection means for detecting the height of the replacement tire supported by the tire changing device;
Signal transmission for transmitting a signal when the height of the tire before replacement reaches the height of the tire to be replaced detected by the height detection means when jacking up the vehicle to which the tire before replacement is installed. and means.

In the tire changing unit of the present invention, in the tire changing device,
An insertion device having a hollow portion and inserted into a wheel hole of a replacement tire supported by the tire changing device; A wheel positioning device configured to be adjustable is provided.

According to the tire changing device of the present invention, the tire can be changed while the tire for replacement is supported by the first support roller and the second support roller. In addition, the vertical movement means vertically moves the frame, and vertically moves the first support roller and the second support roller that support the tire, thereby adjusting the height of the wheel of the replacement tire. It can be adjusted to the height of automobile hub bolts, that is, the height at which tires can be changed. Therefore, tire replacement work can be performed easily and safely. In addition, it is composed of the first support roller, the second support roller, the frame, the vertical movement means, and the frame movement means, so that the construction can be made compact and the cost can be reduced.

1 is a front view showing a tire changing device according to the present invention; FIG. It is a figure which shows the tire changing apparatus of FIG. 1, the figure (a) is a left side view, and the figure (b) is a partial top view. 2 is a partially enlarged front view of the tire changing device of FIG. 1; FIG. 2 is a side view of a height matching jig for use with the tire changing apparatus of FIG. 1; FIG. FIG. 4 is a front view showing the height matching jig of FIG. 3; Fig. 2 shows a wheel positioning tool used for tire changing together with the tire changing device shown in Fig. 1, where (a) is a plan view, (b) is a side view, and (c) is a It is a front view. FIG. 7 is a side view showing a state of tire replacement using the wheel positioning jig shown in FIG. 6 ;

Next, embodiments of the present invention will be described in detail based on the drawings. 1 and 2, reference numeral 10 indicates a tire changing device of the present invention, and reference numeral 78 indicates a tire changing unit. The tire changing machine 10 is configured to support a replacement tire 12 of an automobile to assist in tire changing.

(composition)
(First support roller and second support roller)
The tire changing device 10 has a first support roller 14 (1) parallel to the rotation center line C1 of the replacement tire 12 to be supported, the longitudinal direction of which is the horizontal direction, and a replacement roller 14 (1) whose longitudinal direction is the horizontal direction. a second support roller 14(2) parallel to the centerline of rotation C1 of the tire 12 and on which the replacement tire 12 rests with the first support roller 14(1). The first support roller 14(1) and the second support roller 14(2) are spaced apart from the first support roller 14(1) and the second support roller 14(2) so that the replacement tire 12 can be placed thereon. W1 is arranged to be shorter than the diameter D1 of the replacement tire 12 to be supported.

(flame)
The tire changing apparatus 10 includes a frame 16 that supports both ends of a first support roller 14(1) and both ends of a second support roller 14(2). The frame 16 includes two first support members 18(1) supporting both ends of the first support roller 14(1) and a second support roller 14(2) so that the first support roller 14(1) can rotate. ) includes two second support members 18(2) rotatably supporting opposite ends of the second support roller 14(2).

The frame 16 is rod-shaped with the vertical direction (the Z-axis direction) as its longitudinal direction, and includes two first supports 20(1) to which the first support members 18(1) are fixed, and the vertical direction as its longitudinal direction. and two second struts 20(2), which are bar-shaped and to which the second support member 18(2) is fixed. The first column 20 ( 1 ) and the second column 20 ( 2 ) are provided with a hollow portion 30 for inserting a pipe 28 to be described later, and a cover member 34 is fixed to the upper portion of the hollow portion 30 . As shown in FIG. 2(a), the frame 16 comprises a first horizontal rod 22(1) fixed between two first struts 20(1) and two second struts 20(2). and a second horizontal bar 22(2) (hidden behind the first horizontal bar 22(1) in FIG. 2(a)) fixed between them. The frame 16 is a connecting horizontal bar fixed between a first support 20(1) on one side (front side in FIG. 1) and a second support 20(2) on one side (front side in FIG. 1). 24. The connecting horizontal rod 24 is composed of a horizontal pipe 50 having a hollow portion, an insertion rod 52 inserted into the horizontal pipe 50 , and a screw 54 for fixing the horizontal pipe 50 to the insertion rod 52 . The connecting horizontal rod 24 is provided with a plurality of vertical holes (not shown), and the screw 54 is passed through one of the vertical holes. By loosening and removing the screw 54 and changing the vertical hole through which the screw 54 is passed, the horizontal pipe 50 can be slid against the insertion rod 52, the length of the connecting horizontal rod 24 can be adjusted, and the first strut 20 can be adjusted. (1) and the second support 20(2) can be adjusted to adjust the distance between the first support roll 18(1) and the second support roll 18(2).

(Means for vertical movement)
The tire changing device 10 includes a vertical movement means 32 for moving the frame 16 up and down. The vertical movement means 32 is inserted from below into the hollow portion 30 of the first strut 20(1) or the second strut 20(2) and comprises a pipe 28 having a bottom portion 36 . The vertical movement means 32 is, as shown in FIG. A fastener 40 rotatable about C2 (shown in FIG. 3), a threaded rod 42 fixed to the fastener 40 and threaded into the lid member 34, and the threaded rod 42 is aligned with the rotation centerline C3 (shown in FIG. 3) of the threaded rod 42. a knob 44 for rotating about the centerline C2, shown in FIG. The vertical movement means 32 includes the replacement tire 12, the first support roller 14(1), the second support roller 14(2), the first support member 18(1), the second support member 18(2), and the first strut. 20(1), the second post 20(2), the knob 44, and the screw rod 42 are integrally configured to elastically move up and down. The replacement tire 12, the first support roller 14(1) and the second support roller 14 are assembled by pressing the screw 47 screwed into the first strut 20(1) or the second strut 20(2) against the pipe 28. (2) First support member 18(1), second support member 18(2), first post 20(1), second post 20(2), knob 44 and threaded rod 42 are attached to pipe 28; It can also be fixed.

(Frame movement means)
As shown in FIGS. 1 and 2, the tire changing apparatus 10 includes frame moving means 46 for moving the frame 16 substantially horizontally. The frame moving means 46 is composed of four casters (wheels) 26 connected to the lower ends of four pipes 28 . The casters 26 are rotatable around the centerline C2.

(Overturn prevention jig)
The tire changing device 10 clamps a substantially cylindrical replacement tire 12 stationary between a first support roller 14(1) and a second support roller 14(2) between two substantially cylindrical circular side surfaces CS1. and an anti-tipping jig 48 configured to prevent the replacement tire 12 from tipping over. As shown in FIG. 2, the overturn prevention jig 48 includes a sliding member 58 fixed to the first horizontal bar 22(1) by a screw 56, a vertical bar 60 fixed to the sliding member 58, and a vertical bar 60 fixed to the sliding member 58. 60 is inserted and fixed to the vertical rod 60 by a screw 62; a horizontal tubular member 66 fixed vertically to the vertical tubular member 64; and a pressing member 70 fixed to the sliders 68 and brought into contact with the circular side surface CS1 of the tire 12 for replacement.

The overturn prevention jig 48 is configured such that by loosening the screw 56, the position of the slide member 58 in the Y-axis direction (horizontal direction) can be changed, thereby changing the position of the overturn prevention jig 48 in the Y-axis direction. It is The overturn prevention jig 48 is configured such that the screw 62 is loosened to move the vertical cylindrical member 64 up and down, thereby changing the vertical position of the pressing member 70 . As shown in FIG. 2( b ), one end of a tension spring 72 is connected to the slider 68 , and the other end of the tension spring 72 is connected to a fixed member 74 fixed to the horizontal tubular member 66 . A pressing member 70 fixed to each slider 68 is configured to sandwich the replacement tire 12 by the biasing force of a tension spring 72 . One pressing member 70 includes a spring hinge 86 that applies a biasing force to the replacement tire 12 in a direction of rotation about the centerline C2. Both biasing members 70 may include spring hinges 86 .

(Tire exchange unit, height matching jig)
(height detection means)
A tire changing unit 78 is composed of the tire changing device 10, a height matching jig 76 (shown in FIGS. 4 and 5), and a wheel positioning tool 116 (shown in FIGS. 6 and 7), which will be described later. As shown in FIGS. 4 and 5, the height matching jig 76 allows the height of the tire before replacement 13 to be supported by the tire changing apparatus 10 when jacking up the vehicle to which the tire before replacement 13 is attached. It is configured to match the height of the replacement tire 12 that is installed. The height matching jig 76 includes height detection means 80 for detecting the height of the replacement tire 12 supported by the tire changing apparatus 10 . The height detection means 80 includes a vertically elongated box 96, a base plate 84 fixed to the box 96 and grounded on the ground 82, a small box 97 arranged to be vertically movable with respect to the box 96, and fixed to the small box 97. A moving plate 88 that moves in the Z-axis direction (vertical direction) with respect to the base plate 84, a tension spring 90 that pulls the moving plate 88 up until it contacts the replacement tire 12, and a small box that is screwed into a box 96. and a stopper 92 that presses 97 to restrict movement of the moving plate 88 in the Z-axis direction. The height sensing means 80 comprises a proximity sensor 94 that is connected to the moving plate 88 within a box 96 and moves with the moving plate 88 in the Z-axis direction. A contact piece 134 is provided on the upper end of the proximity sensor 94 and configured to respond when a magnet or the like contacts the upper end of the contact piece 134 . Proximity sensor 94 is configured to move along groove 98 in the Z-axis direction. The height detection means 80 detects the proximity sensor 94 in a state where the tension spring 90 pulls up the moving plate 88 and the moving plate 88 comes into contact with the lower surface of the replacement tire 12 supported by the tire changing device 10 and stops. A magnet 100 is provided for anchoring to the upper end of the contact piece 134 . The magnet 100 is provided with a pointer 102 indicating the vertical height of the replacement tire 12 supported by the tire changing device 10 .

(signal transmitting means)
In the height matching jig 76, the proximity sensor 94 moves from below and the proximity sensor 94 moves from the magnet 100 in a state in which the indicator 102 of the magnet 100 indicates the vertical height of the replacement tire 12 supported by the tire changing device 10. A buzzer (signal transmitting means) 104 is provided for transmitting a sound when the is detected. The buzzer 104 temporarily moves the proximity sensor 94 downward together with the moving plate 88 to slightly jack up the sensor 94 while the needle 102 of the magnet 100 indicates the height of the replacement tire 12 supported by the tire changing device 10 . The moving plate 88 is inserted under the tire 13 before replacement of the automobile, the movement restriction of the proximity sensor 94 and the moving plate 88 by the stopper 92 is released, and the moving plate 88 moves upward to the lower surface of the tire 13 before replacement. A control box 130 is provided with a buzzer (signal transmitting means) 104 that emits a sound when the proximity sensor 94 and the moving plate 88 stop and the proximity sensor 94 detects the magnet 100 . The power of the buzzer 104 can be turned on by pressing the push button switch 132 . That is, the buzzer 104 indicates that when the automobile to which the tire 13 before replacement is mounted is jacked up, the proximity sensor 94 moves upward together with the moving plate 88, the proximity sensor 94 detects the magnet 100, and the tire 13 before replacement is detected. A sound is emitted when the height reaches the height of the replacement tire 12 detected by the height detection means 80 . The signal emitting means may be configured to emit light instead of sound or light together with sound.

(height recording means)
The height matching jig 76 has a height recording means 112 comprising a pointer 108 that can move up and down along the pole 106 and a screw 110 for fixing the pointer 108 . The height recording means 112 fixes the pointer 108 to a position that overlaps the back side of the pointer 102 in a front view in a state where the pointer 102 of the magnet 100 indicates the height of the replacement tire 12 supported by the tire changing device 10. Then, the height of the replacement tire 12 supported by the tire changing device 10 is recorded. The height recording means 112 has a scale 114 that allows the height of the hands 102 and 108 to be visually recognized.

(Wheel positioning device)
As shown in FIGS. 6 and 7, the wheel positioning device 116 includes an inserter 120 partially inserted into the wheel hole 118 of the replacement tire 12 supported by the tire changing apparatus 10, and fixed below the inserter 120. It comprises a fixture 122 having a rotation center axis C4 and a rotating mirror 124 rotatable around the rotation center axis C4. The insertion tool 120 has a hollow portion 128 so that the hub bolt 126 from which the tire 13 before replacement can be removed can be seen. In order to stabilize the positional relationship of the wheel positioning device 116 with respect to the wheel hole 118, the outer peripheral surface of the inserting tool 120 is configured to fit tightly into the inner peripheral surface of the wheel hole 118. As shown in FIG. When the wheel positioning device 116 attaches the replacement tire 12 supported by the tire changing apparatus 10 to the hub bolt 126 from which the pre-exchange tire 13 has been removed, the wheel positioning device 116 inserts the insert 120 into the replacement supported by the tire changing apparatus 10 . The replacement tire 12 is inserted into the wheel hole 118 of the replacement tire 12, the rotation angle of the replacement tire 12 around the rotation center line C1 is adjusted, and the rotation angle of the rotation mirror 124 around the rotation center axis C4 is adjusted. Through the wheel hole 118, the hub bolt 126 from which the tire 13 before replacement is removed can be seen. That is, the wheel positioning device 116 is configured so that it can be visually confirmed that the position of the wheel hole 118 matches the position of the hub bolt 126 when viewed from the front.

(Action and effect)
The operation of the present invention will be described below in chronological order.

(Tire placement)
As shown in FIGS. 1 and 2(a), the tire changing apparatus 10 is placed on the ground 82 and the replacement tire 12 is placed on the first retaining roller 14(1) and the second retaining roller 14(2). placed. When the replacement tire 12 is placed, the impact of the first retaining roller 14(1) and the second retaining roller 14(2) causes the compression spring 38 to elastically move the frame 16 up and down relative to the pipe 28. is mitigated by Rotating the knob 44 and the threaded rod 42 about the centerline of rotation C3 (shown in FIG. 3) increases the distance from the lid member 34 to the fastener 40, thereby increasing the distance between the frame 16 and the first support roller 14(1). , and the second support roller 14(2) are raised, and the height H1 of the replacement tire 12 is increased. By rotating the knob 44 and the screw rod 42 in the reverse direction, the height H1 of the replacement tire 12 is reduced. Thus, the height H1 of the replacement tire 12 can be adjusted. The height H1 of the replacement tire 12 may be adjusted by replacing the first support roller 14(1) and the second support roller 14(2) with different diameters.

(Tire height detection)
A moving plate 88 of the height matching jig 76 is positioned under the replacement tire 12 supported by the tire changing apparatus 10, as indicated by the dashed line in FIG. At this time, the upward movement of the moving plate 88 is restricted by the stopper 92 . Next, the stopper 92 is rotated to release the restriction on the movement of the moving plate 88, and the moving plate 88 is pulled up by the tension spring 90 and comes into contact with the lower surface of the replacement tire 12 as shown by the solid line in FIG. be done. Proximity sensor 94 is pulled up with moving plate 88 to a stop. A magnet 100 is placed in box 96 so as to contact the upper end of contact piece 134 of proximity sensor 94 . Moving plate 88 and proximity sensor 94 are pulled down to the position indicated by the two-dot chain line in FIG. The magnet 100 remains stationary in the box 96 so that the height of the replacement tire 12 can be discerned by the magnet 100 . In this way, the height H1 of the replacement tire 12 is detected by the height detection means 80 of the height matching jig 76 . At this time, the pointer 108 of the height recording means 112 is fixed at a position overlapping the back side of the pointer 102 in front view, and the vertical height of the replacement tire 12 supported by the tire changing device 10 is recorded. Separately, it is not necessary to detect the height H1 of the replacement tire 12 by the height detection means 80 when replacing the tire with another replacement tire 12 .

(Jack up)
A jack (not shown) is attached to the side sill 136 (shown in FIG. 7) of the vehicle undergoing tire change. The car is slightly jacked up. As indicated by the dotted line in FIG. 4, the moving plate 88 of the height matching jig 76 is positioned under the tire 13 before replacement of the automobile, and the moving plate 88 is brought into contact with the tire 13 before replacement. At this time, the upward movement restriction of the moving plate 88 by the stopper 92 is released. The push button switch 132 of the buzzer 104 (shown in FIG. 5) of the height matching jig 76 is turned on. It is further jacked up, and the moving plate 88 and the proximity sensor 94 are raised. Before long, the contact piece 134 of the magnet 100 comes into contact with the magnet 100, and the buzzer 104 emits a sound, as indicated by the solid line in FIG. As described above, the position of the magnet 100 is maintained while the height H1 of the replacement tire 12 supported by the tire changing device 10 is detected. , the height of the pre-replacement tire 13 matches the height H1 of the replacement tire 12 supported by the tire changing device 10 . The tire 13 before replacement is removed from the automobile hub bolt 126 (shown in FIG. 7).

(Attachment of Replacement Tire Supported by Tire Changing Device to Automobile)
The tire changing device 10 supporting the replacement tire 12 is moved to the vicinity of the hub bolt 126 from which the tire before replacement 13 has been removed, and as shown in FIG. It is oriented in a direction parallel to the front-rear direction (X-axis direction). A tire changing apparatus 10 supporting a replacement tire 12 is moved toward the vehicle (in the positive Y-axis direction). While the first support roller 14(1) and the second support roller 14(2) supporting the replacement tire 12 are rotated, the replacement tire 12 is rotated about the rotation centerline C1. As shown in FIG. 7, the positions of the plurality of wheel holes 118 of the replacement tire 12 are aligned with the positions of the plurality of hub bolts 126 of the vehicle when viewed in the positive direction of the Y axis. At this time, it is visually confirmed through the rotating mirror 124 of the wheel positioning device 116 that the position of the wheel hole 118 matches the position of the hub bolt 126 . The tire changing device 10 supporting the replacement tire 12 is further moved in the positive Y-axis direction, and the hub bolts 126 are inserted into the plurality of wheel holes 118 . Nuts (not shown) are screwed onto the plurality of hub bolts 126 , and the tire changing device 10 is retracted in the Y-axis negative direction and separated from the tire to be replaced 12 . The replacement tire 12 is lowered onto the ground 82 by a jack, completing the tire replacement.

According to the tire changing device 10 of the present invention, the tire can be changed while the replacement tire 12 is supported by the first support roller 14(1) and the second support roller 14(2). Also, when the height matching jig 76 is not used, the vertical movement means 32 moves the frame 16 up and down so that the first support roller 14(1) and the second support roller 14(2) that support the replacement tire 12 are mounted. ) is moved up and down to adjust the height of the wheel hole 118 of the replacement tire 12 to the height of the hub bolt 126 of the vehicle from which the tire 13 before replacement is removed, that is, the height at which the tire can be replaced. Therefore, tire replacement work can be performed easily and safely. In addition, the tire changing device 10 is composed of the first supporting roller 14(1), the second supporting roller 14(2), the frame 16, the vertical movement means 32, and the frame movement means 46, and has a compact construction. can reduce costs.

In addition, according to the tire changing apparatus 10 of the present invention, the first supporting roller 14(1), the second supporting roller 14(2), and the frame 16 that support the tire to be replaced 12 are vertically moved integrally. can be done. Therefore, the replacement tire 12 can be stably moved vertically in parallel. Further, according to the tire changing apparatus 10 of the present invention, the anti-overturn mechanism is configured to prevent overturning of the replacement tire 12 supported by the first support roller 14(1) and the second support roller 14(2). Since the jig 48 is provided, the replacement tire 12 can be stably supported by the first support roller 14(1) and the second support roller 14(2). Further, according to the tire changing apparatus 10 of the present invention, the overturn prevention jig 48 is configured to move up and down simultaneously with the frame 16, so that the first support roller 14 (1) that supports the replacement tire 12 The replacement tire 12 can be stably moved up and down without changing the positional relationship between the replacement tire 12 and the first support roller 14(1) or the like.

Further, according to the tire changing unit 78 of the present invention, since the height matching jig 76 is provided, when the vehicle to which the tire 13 before replacement is mounted is jacked up, the height of the tire 13 before replacement is adjusted to match the height of the tire 13 before replacement. It can match the height of the replacement tire 12 supported by the device 10 . Therefore, the tire can be easily changed only by horizontally moving the tire changing device 10 that supports the tire 12 to be changed. Further, according to the tire changing unit 78 of the present invention, since the wheel positioning device 116 is provided, the hub bolt 126 can be seen through the wheel hole 118 of the replacement tire 12, and the position of the wheel hole 118 is the position of the hub bolt 126 when viewed from the front. It can be visually confirmed that the Therefore, tire replacement is facilitated.

As described above, one embodiment of the present invention has been described with reference to the drawings, but the present invention is not limited to the illustrated embodiment. For example, the first support roller 14(1) and the second support roller 14(2) are automatically rotated to replace the replacement tire supported by the first support roller 14(1) and the second support roller 14(2). A matching mechanism configured to rotate 12 and stop when the wheel holes 118 of the replacement tire 12 are aligned with the positions of the hub bolts 126 may be provided. Also, the tire changing unit 76 of the present invention does not have to be provided with the height matching jig 76 . In addition, the present invention can be implemented within a range in which the same actions and effects are produced, and is not limited to the above-described embodiments.

10: Tire changing device 12: Replacement tire 13: Tire before replacement 14 (1): First support roller 14 (2): Second support roller 16: Frame 18 (1): First support member 18 (2): Second support member 20(1): First strut 20(2): Second strut 22(1): First horizontal rod 22(2): Second horizontal rod 24: Connecting horizontal rod 26: Caster (wheel)
28: Pipe 30: Hollow portion 32: Vertical moving means 38: Compression spring 46: Frame moving means 48: Fall prevention jig 76: Height matching jig 78: Tire changing unit 80: Height detecting means 88: Moving plate 90 : Extension spring 94: Proximity sensor 100: Magnet 102: Pointer 104: Buzzer (signal transmitting means)
108: Pointer 112: Recording means 116: Wheel positioning device 118: Wheel hole 120: Insertion tool 124: Rotating mirror 126: Hub bolt 128: Hollow part C1: Rotation center line C2: Center line C3: Rotation center line C4: Rotation center axis CS: circular side D1: diameter W1: spacing

Claims (2)

a tire changing device that supports a replacement tire of an automobile and assists in changing the tire;
A height match configured to match the height of the pre-replacement tire to the height of the replacement tire supported by the tire changing device when the vehicle having the pre-replacement tire mounted thereon is jacked up. A tire changing unit comprising a jig,
The tire changing device
a first support roller having a horizontal direction as a longitudinal direction and parallel to the center line of rotation of the tire to be supported;
a second support roller whose longitudinal direction is horizontal and which is parallel to the centerline of rotation of the tire it supports and which, together with the support roller, positions the tire;
a frame supporting both ends of the first support roller and both ends of the second support roller;
vertical movement means for moving the frame up and down;
a frame moving means for moving the frame in the horizontal direction,
The height matching jig is
height detection means for detecting the height of the replacement tire supported by the tire changing device;
Signal transmission for transmitting a signal when the height of the tire before replacement reaches the height of the tire to be replaced detected by the height detection means when jacking up the vehicle to which the tire before replacement is installed. consisting of means and
An insertion device having a hollow portion and inserted into a wheel hole of a replacement tire supported by the tire changing device; A tire changing unit with a wheel positioning device configured to be adjustable. The tire changing device clamps the substantially cylindrical replacement tire fixed on the first support roller and the second support roller between two circular side surfaces of the column, thereby causing the replacement tire to overturn. 2. A tire changing unit according to claim 1, comprising an anti-tipping jig configured to prevent an overturn.

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