Auxiliary device for tire mounting and detachment equipment

Abstract

To provide an auxiliary device for a tire mounting / detaching device that can be easily attached to and detached from the tire mounting / detaching device. [Solution] The auxiliary device 100 for the tire mounting / detaching device is provided on the tire mounting / detaching device 1, which includes a chuck portion 11 for gripping the wheel 8, a rotating shaft 12 to which the chuck portion 11 is connected and which is rotationally driven around a rotation axis L, and a rotational drive portion M for rotating the rotating shaft 12. The auxiliary device 100 for the tire mounting / detaching device includes a cylindrical first arm 101 that is inserted into and fitted onto the rotating shaft 12, a cylindrical second arm 102 that is inserted into and fitted onto the first arm 101, a third arm 103 fixed to the second arm 102, a pad member 104 disposed on the third arm 103, and protruding portions 115, 116 disposed on the first arm 101 and the second arm 102, with at least a portion of them protruding to the same side as the third arm 103.

Description

Technical Field

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[0001] The present invention relates to an auxiliary device for a tire mounting / demounting device, which is used by being attached to the tire mounting / demounting device when performing a tire mounting / demounting operation.

Background Art

[0002] A tire mounting / demounting device includes a chuck portion that detachably grips a wheel, a rotating shaft to which the chuck portion is connected and is rotationally driven about an axis, and a driving portion that rotates the rotating shaft about the axis. The auxiliary device for a tire mounting / demounting device includes a first arm having one end into which the rotating shaft of the tire mounting / demounting device is inserted and fitted, a second arm having one end fixed at a right angle to the other end of the first arm, a pad member disposed at the other end of the second arm, and a connecting body that detachably connects one end of the first arm to the rotating shaft (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional auxiliary device for a tire mounting / demounting device, it has taken time and labor to operate the connecting body. There is a need for an auxiliary device for a tire mounting / demounting device that can be easily attached to and easily removed from the tire mounting / demounting device.

Means for Solving the Problems

[0005] The present invention provides an auxiliary device for a tire mounting and detachment device, which is provided in a tire mounting and detachment device for removing a tire from a wheel or mounting a tire to a wheel, comprising: a rim portion on which the bead portion of a tire sits; a disc portion having a hub portion in which a hub hole is formed; a chuck portion that fits into the hub hole of a wheel and grips the wheel in a manner that allows the wheel to be mounted or detached; a rectangular cylindrical rotating shaft to which the chuck portion is connected and which is rotationally driven around a horizontal axis of rotation; and a rotational drive unit that rotates the rotating shaft around the axis of rotation. A cylindrical first arm having one end that is inserted into and fitted onto the aforementioned rotating shaft, A cylindrical second arm having one end that is inserted into and fitted into the other end of the first arm, A third arm having one end fixed perpendicularly to the other end of the second arm, A pad member is disposed at the other end of the third arm and protrudes to the same side as the second arm, The invention is characterized by comprising: a projection disposed at one end of the first arm and one end of the second arm, with at least a portion of which protrudes to the same side as the third arm.

[0006] Furthermore, the present invention is characterized in that the first arm and the second arm are rectangular tubular in shape. [Effects of the Invention]

[0007] According to the present invention, an auxiliary device for a tire mounting / detaching device can be easily attached to and easily removed from the tire mounting / detaching device. Furthermore, according to the present invention, it is possible to prevent the first arm from unintentionally detaching from the rotation axis or the second arm from unintentionally detaching from the first arm during the tire mounting / detaching operation. [Brief explanation of the drawing]

[0008] [Figure 1] This is a cross-sectional view showing an auxiliary device 100 for a tire mounting / detaching device according to one embodiment of the present invention attached to the tire mounting / detaching device 1. [Figure 2]This is an exploded perspective view of an auxiliary device 100 for a tire mounting / detaching device according to one embodiment of the present invention. [Figure 3] This is a cross-sectional view showing the locked state of the first arm 101 and the second arm 102. [Figure 4A] This is an enlarged cross-sectional view showing the IVA section in Figure 3. [Figure 4B] This is an enlarged cross-sectional view showing the IVB section in Figure 3. [Figure 5] This is a cross-sectional view showing the state in which the removal of tire 2 has begun. [Figure 6] This is a cross-sectional view showing the state in which the opposite side of the pad member 104 is pressed by the bead roller 19. [Figure 7] This is a cross-sectional view showing the state in which the front bead portion 9 has been pushed out from the rim portion 4. [Figure 8] This is a cross-sectional view showing the state in which the pressure on the tire 2 by the bead roller 19 has been released. [Figure 9] This is a cross-sectional view showing the state after the installation of tire 2 has begun. [Figure 10] This is a cross-sectional view showing the front bead portion 9 mounted on the wheel 8. [Figure 11] This is a cross-sectional view showing the connection between the first arm 101 and the second arm 102. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. In each drawing, the same or substantially the same elements or parts are denoted by the same reference numerals, and redundant descriptions are omitted.

[0010] Figure 1 is a cross-sectional view showing the auxiliary device 100 for a tire mounting / detaching device according to one embodiment of the present invention attached to the tire mounting / detaching device 1; Figure 2 is an exploded perspective view of the auxiliary device 100 for a tire mounting / detaching device according to one embodiment of the present invention; Figure 3 is a cross-sectional view showing the locked state of the first arm 101 and the second arm 102; Figure 4A is an enlarged cross-sectional view showing the IVA portion of Figure 3; and Figure 4B is an enlarged cross-sectional view showing the IVB portion of Figure 3. In Figures 3, 4A, and 4B, the inclination of the first arm 101 and the second arm 102 is emphasized to facilitate illustration.

[0011] The auxiliary device 100 for the tire mounting / detachment device (also simply called the auxiliary device) of this embodiment is used attached to the tire mounting / detachment device 1 (see Figure 1) for detaching the tire 2 from the wheel 8 or mounting the tire 2 onto the wheel 8. The wheel 8 has, for example, a rim diameter of 22.5 inches and a rim width of 14 inches. The tire 2 is an ultra-low profile tire with an aspect ratio of 55% or less. The tire 2 may be, for example, a tire with a tire width of 445 mm, a tire inner diameter of 22.5 inches and an aspect ratio of 50% (445 / 50R22.5), or a tire with a tire width of 455 mm, a tire inner diameter of 22.5 inches and an aspect ratio of 55% (455 / 55R22.5).

[0012] The tire 2 is a pneumatic wheel-mounted tire comprising a carcass having a main body portion extending from the tread portion through the sidewall portion to the bead core of the bead portion, and a folded portion connected to the main body portion and folded back from the inner side to the outer side in the tire axial direction around the bead core. A side reinforcement layer made of carbon fiber reinforced plastic (CFRP) is provided on the outer surface of the sidewall portion. The orientation direction of the reinforcing fibers of the CFRP is 60 degrees or less with respect to the tire radius line. The side reinforcement layer has high tensile elasticity properties with respect to the tire radius direction. Because the sidewall portion of the ultra-low profile tire is highly rigid, the attachment and detachment of the tire to the wheel 8 can be easily performed by using the auxiliary device 100.

[0013] The wheel 8 includes a rim portion 4 on which the bead portion 3 of the tire 2 is seated, and a disk portion 7 having a hub portion 6 in which a hub hole 5 is formed. The tire attaching / detaching device 1 includes a chuck portion 11, a rotating shaft 12, and a rotation driving portion. The chuck portion 11 fits into the hub hole 5 of the wheel 8 and detachably grips the wheel 8. The rotating shaft 12 has a square tubular shape and is rotationally driven about a horizontal rotation axis L by the rotation driving portion. The axis of the rotating shaft 12 coincides or substantially coincides with the rotation axis L. The rotation driving portion is configured to include a motor M. The motor M may be a hydraulic motor.

[0014] The chuck portion 11 includes two sets of connecting plates 52, 53, a guide plate 57, a receiving member 58, a chuck flange 62, four link members 65, a plurality (for example, four) of chuck claws 13, a cylinder case 68, a piston 72, a divider 77, a slip ring 83, and a sprocket wheel 85. The plurality of chuck claws 13 expand radially outward of the wheel 8 and separate from each other, and can grip the hub portion 6 of the wheel 8 from the inside. The rotational force from the motor M is transmitted to the sprocket wheel 85 via a chain 86.

[0015] As shown in FIG. 2, the auxiliary device 100 for the tire attaching / detaching device includes a first arm 101, a second arm 102, a third arm 103, a pad member 104, and protruding portions 115, 116.

[0016] The first arm 101 has one end portion (also referred to as the first end portion) 105 that is inserted into and fitted to the rotating shaft 12, and the other end portion (also referred to as the second end portion) 106 on the side opposite to the first end portion 105. The first arm 101 has a tubular shape. The first arm 101 may have a square tubular shape. When the first end portion 105 of the first arm 101 is inserted and fitted to the rotating shaft 12, its axis (also referred to as the first axis) L1 coincides or substantially coincides with the rotation axis L. The first arm 101 may be made of a metal material such as steel or stainless steel.

[0017] The second arm 102 has one end (also called the third end) 107 that is inserted into and fitted into the second end 106 of the first arm 101, and the other end (also called the fourth end) 108 opposite to the third end 107. The second arm 102 is cylindrical. The second arm 102 may be rectangular. When the third end 107 of the second arm 102 is inserted into and fitted into the second end 106, its axis (also called the second axis) L2 coincides with or approximately coincides with the first axis L1 of the first arm 101. The second arm 102 may be made of a metal material such as steel or stainless steel.

[0018] The third arm 103 has one end (also called the fifth end) 109 fixed perpendicularly to the fourth end 108 of the second arm 102, and the other end (also called the sixth end) 110 opposite to the fifth end 109. The third arm 103 may be cylindrical. The third arm 103 may be made of a metal material such as steel or stainless steel.

[0019] The pad member 104 is disposed on the sixth end 110 of the third arm 103, protruding from one end in the axial direction of the first arm 101. The pad member 104 is disposed opposite the tire 2. The pad member 104 includes a base 111 fixed to the sixth end 110 and a contact pad 112 fixed to the base 111. The base 111 may be made of a metal material such as steel or stainless steel. The contact pad 112 may be screwed to the base 111 by screws. The contact pad 112 may be made of an elastic material. The elastic material may be a synthetic rubber such as butylene rubber that is harder than the tire 2. The contact pad 112 may be a hollow structure made of an extruded body of an elastic material.

[0020] The contact pad 112 may have a first contact portion 113 and a second contact portion 114. The first contact portion 113 contacts the lug portion 21 of the wheel 8 from the side. The second contact portion 114 contacts the side wall portion (also called the sidewall) of the tire 2 from the side when the first contact portion 113 is in contact with the lug portion 21. The thickness of the second contact portion 114 is determined considering the amount of indentation of the second contact portion 114 when it is pressed into the tire 2, and is thicker than the first contact portion 113 and is formed in a rectangular parallelepiped shape. The contact surface of the first contact portion 113 that contacts the lug portion 21 of the wheel 8, and the contact surface of the second contact portion 114 that contacts the side wall portion of the tire 2, may be flat, or they may be curved convexly toward the bead portion 3 side of the tire 2.

[0021] The protruding portion (also called the first stopper) 115 is located at the first end 105 of the first arm 101. At least a portion of the first stopper 115 protrudes in the same direction as the extension of the third arm 103 (sixth end 106).

[0022] The first stopper 115 includes, for example, a flange nut 117 and a hollow set 118. The flange nut 117 is disposed on the inner circumferential surface 105a of the first end 105. The flange nut 117 may be fixed to the inner circumferential surface 105a by welding or the like. The hollow set 118 is screwed onto the flange nut 117, and at least a portion (the tip) of it protrudes outward from the outer circumferential surface of the first end 105 through a through hole formed in the first end 105. The tip of the hollow set 118 has a pointed shape.

[0023] The protruding portion (also called the second stopper) 116 is disposed at the third end 107 of the second arm 102. At least a portion of the second stopper 116 protrudes in the same direction as the extension of the third arm 103 (sixth end 106). The second stopper 116 includes, for example, a flange nut 119 and a hollow set 120.

[0024] The flange nut 119 is disposed on the inner circumferential surface 107a of the third end portion 107. The flange nut 119 may be fixed to the inner circumferential surface 107a by welding or the like. The holo set 120 is screwed onto the flange nut 119, and at least a portion (the tip) of it protrudes outward from the outer circumferential surface of the third end portion 107 through a through hole formed in the third end portion 107. The tip of the holo set 120 has a pointed shape.

[0025] The auxiliary device 100 can be easily attached to the tire mounting device 1 by inserting and fitting the first end 105 of the first arm 101 onto the rotating shaft 12 of the tire mounting device 1, and inserting and fitting the third end 107 of the second arm 102 onto the second end 106 of the first arm 101. The third end 107 is inserted and fitted onto the second end 106 such that the first stopper 115 protrudes in the same direction as the extension of the third arm 103.

[0026] The first arm 101 and the second arm 102 may have markings 121 for aligning them with each other. As shown in Figure 2, the markings 121 may be arrows formed on the outer surfaces of the first arm 101 and the second arm 102, with their tips facing each other when the first stopper 115 is protruding toward the third arm 103.

[0027] When attaching or detaching a tire 2 using the tire attachment / detachment device 1 to which the auxiliary device 100 is attached (see Figures 6-10), a reaction force R from the tire 2 (also called the tire reaction force) is applied to the pad member 104 located at the sixth end 110 of the third arm 103. As a result, bending moments are generated in the first arm 101 and the second arm 102. As shown in Figures 3, 4A, and 4B, the second arm 102 tilts with respect to the first axis L1 of the first arm 101, and the first arm 101 tilts with respect to the rotation axis L of the rotation axis 12. Consequently, the first end 105 is pressed against the inner circumferential surface of the rotation axis 12, the third end 107 is pressed against the inner circumferential surface of the second end 106, and the load is concentrated at the tip of the holoset 118 and 120.

[0028] As a result, the tip of HoloSet 118 bites into the inner surface of the rotating shaft 12, and the tip of HoloSet 120 bites into the inner surface of the second end 106, thereby preventing the first arm 101 from coming off the rotating shaft 12 and preventing the second arm 102 from coming off the first arm 101. The load on the tips of HoloSet 118 and 120 increases as the tire reaction force R increases. Therefore, the auxiliary device 100 can obtain sufficient fixing (locking) strength regardless of the magnitude of the tire reaction force R.

[0029] The amount of protrusion from the outer circumferential surface of the first end 105 of the tip of HoloSet 118, and the amount of protrusion from the outer circumferential surface of the third end 107 of the tip of HoloSet 120, may be, for example, about 0.3 to 0.7 mm, or about 0.5 mm. In this case, sufficient locking strength can be obtained without hindering the insertion and fitting of the first end 105 onto the rotating shaft 12, and the insertion and fitting of the third end 107 onto the second end 106.

[0030] The amount of protrusion of the tip portions of the HoloSet 118 and 120 can be easily adjusted by adjusting the screw threading amount of the HoloSet 118 and 120. The distance of the tip portion of the HoloSet 118 from the edge of the first end portion 105 on the tire attachment / detachment device 1 side (right side in Figure 1) in the longitudinal direction of the first arm 101 may be, for example, about 5.0 to 10 mm, or about 7.5 mm. The distance of the tip portion of the HoloSet 120 from the edge of the second end portion 107 on the tire attachment / detachment device 1 side (right side in Figure 1) in the longitudinal direction of the second arm 102 may be, for example, about 5.0 to 10 mm, or about 7.5 mm.

[0031] The first arm 101 and the second arm 102 may be rectangular tubular in shape. In this case, the rotation of the rotating shaft 12 can be reliably transmitted to the first arm 101 and the second arm 102. Furthermore, the second arm 102 rotates around the second axis L2 relative to the first arm 101, which prevents the protruding direction of the first stopper 115 and the protruding direction of the second stopper 116 from becoming different. This prevents the grip of the first stopper 115 on the inner surface of the rotating shaft 12 from weakening, and prevents the first arm 101 from coming off the rotating shaft 12.

[0032] Furthermore, as will be described in more detail later (see Figure 11), the locking strength between the rotating shaft 12 and the first arm 101, and the locking strength between the first arm 101 and the second arm 102 can be improved.

[0033] The rotating shaft 12 has a larger diameter than the first end of the first arm 101, thereby allowing the first end 105 of the first arm 101 to be inserted into and out of the rotating shaft 12. The rotating shaft 12 may have an inner circumferential surface that is approximately square in shape (for example, a square with rounded corners) with a side length of about 41 mm when viewed in cross-section perpendicular to the axis of rotation L.

[0034] The first end 105 of the first arm 101 may have a roughly square outer surface with a side length of about 40 mm when viewed in a cross-section perpendicular to the first axis L1. The second end 106 of the first arm 101 may be larger in diameter than the first end 105. The second end 106 may have a roughly square outer surface with a side length of about 50 mm and a roughly square inner surface with a side length of about 41 mm when viewed in a cross-section perpendicular to the first axis L1. The second end 106 of the first arm 101 has a larger diameter than the third end 107 of the second arm 102, thereby allowing the third end 107 of the second arm 102 to be detachably inserted into the second end 106 of the first arm 101. The third end 107 of the second arm 102 may have a roughly square outer surface with a side length of about 40 mm when viewed in a cross-section perpendicular to the second axis L2.

[0035] The auxiliary device 100 may have a plurality (for example, two or three) of first stoppers 115. The plurality of first stoppers 115 may be arranged in a direction perpendicular to the axis of the first arm 101.

[0036] The auxiliary device 100 may have a plurality (for example, two or three) of second stoppers 116. The plurality of second stoppers 116 may be arranged in a direction perpendicular to the axis of the second arm 102.

[0037] The following explanation describes the process of attaching and detaching tires 2 using the tire attachment / detachment device 1 equipped with the auxiliary device 100 for the tire attachment / detachment device, referring to Figures 5 to 11. In the following explanation, terms such as upper side, lower side, left side, and right side may be used based on the positional relationships shown in the drawings.

[0038] First, the process of removing the tire 2 from the wheel 8 will be explained. Figure 5 is a cross-sectional view showing the state in which the tire 2 removal process has begun, Figure 6 is a cross-sectional view showing the state in which the opposite side of the pad member 104 has been pressed by the bead roller 19, Figure 7 is a cross-sectional view showing the state in which the front bead portion 9 has been pushed out from the rim portion 4, and Figure 8 is a cross-sectional view showing the state in which the pressure on the tire 2 by the bead roller 19 has been released.

[0039] First, as shown in Figure 5, the wheel 8 with the tire 2 mounted is gripped by the chuck portion 11. Then, the tire 2 is pushed in about 5 cm by the bead roller 19 of the tire mounting device 1. The auxiliary device 100 is then inserted above the bead roller 19 until the first contact portion 113 of the contact pad 112 contacts the wheel 8, thereby separating the front bead portion 9 (left bead portion 3) from the lug portion 21 of the wheel 8. The tire reaction force R generated at this time is small, equivalent to the force that causes the pushed-in tire 2 to return to its original shape. In the case of small diameter wheels where the first contact portion 113 does not make contact, it is sufficient to insert the device until it reaches the position indicated by the mark 122 formed on the second contact portion 114.

[0040] Next, as shown in Figure 6, the bead roller 19 is moved to the right side of the tire 2, and the bead roller 19 pushes the opposing side of the pad member 104, generating a force F1 that tries to push the front bead portion 9 to the left, and as shown in Figure 7, the front bead portion 9 is pushed out from the rim portion 4. The bead wire (shown as a dashed line in Figure 6) embedded in the bead portion 3 is a ring-shaped steel wire and does not expand or contract easily, so the front bead portion 9 on the contact pad 112 side is guided to move into the well 10 according to the shape of the wheel 8. The contact pad 112 guides the front bead portion 9 into the well 10 of the wheel 8, which reduces the load on the front bead portion 9 when the bead roller 19 pushes the opposing side of the pad member 104.

[0041] As the bead portion 9 on the front side is pushed out, the tire 2 moves closer to the worker (left side in Figure 7), but the auxiliary device 100 catches the tire 2, so the worker is safe. The tire reaction force R generated at this time is due to the weight of the tire 2 and the reaction of the tire 2 being pushed out by the bead roller 19, and a large tire reaction force R is generated instantaneously, but the locking mechanism of the auxiliary device 100 prevents the tire 2 from flying off the wheel 8 and the auxiliary device 100 from coming off.

[0042] Next, as shown in Figure 8, the pressure applied to the tire 2 by the bead roller 19 is released so that the bead roller 19 and the tire 2 do not come into contact, and the tire 2 is rotated so that the pad member 104 is at the 6 o'clock position (lowest position). Subsequently, the operator pushes the lower part of the tire 2 by hand as indicated by arrow A, releasing the bending moment on the first arm 101 and the second arm 102, and pulls the auxiliary device 100 off the rotating shaft 12.

[0043] As shown in Figure 8, the front bead portion 9 is detached, and the force F2 due to the weight of the tire 2 is applied to the top of the tire 2, so the force required for the worker to push the tire 2 by hand is minimal. Subsequently, by pushing the back bead portion (right bead portion 3) away from the wheel 8 to the left, the tire 2 can be detached from the wheel 8.

[0044] Next, the process of mounting the tire 2 onto the wheel 8 will be described. Figure 9 is a cross-sectional view showing the state in which the mounting process of the tire 2 has begun, Figure 10 is a cross-sectional view showing the state in which the front bead portion 9 is mounted on the wheel 8, and Figure 11 is a cross-sectional view showing the connected state of the first arm 101 and the second arm 102. The connected state of the rotation shaft 12 and the first arm 101 (not shown) is the same as in Figure 11.

[0045] First, as shown in Figure 9, the rear bead portion is pushed into the wheel 8 gripped by the chuck portion 11, and the side wall portion of the tire 2 is pushed in by about 10 cm using the pad member 104. Also, the auxiliary device 100 is attached to the tire mounting device 1 above the bead roller 19. The tire reaction force R generated at this time is the resultant force of the pushed-in tire 2 trying to return to its original shape and the force due to the weight of the tire 2 trying to come out because the front bead portion 9 has come off. Because the tire reaction force R is large, the locking strength of the auxiliary device 100 is also increased, and the first arm 101 and the second arm 102 do not come off.

[0046] Next, as shown in Figure 10, rotate the tire 2 in the forward direction and check whether the front bead portion 9 has fallen into the well 10 on the opposite side of the contact pad 112. Then, loosen the pressure of the bead roller 19 to about 2-3 cm, and rotate the tire 2 in the forward direction again to mount the tire 2 onto the wheel 8.

[0047] As the outer bead portion 9 protruding from the wheel 8 is pushed toward the well 10, the auxiliary device 100 locks due to the tire reaction force R generated as the tire 2 tries to return to its original shape. Furthermore, as the second arm 102 rotates around the second axis L2 relative to the first arm 101, and the first arm 101 rotates around the first axis L1 relative to the rotation axis 12, a lock is generated by multiple corner contact portions 123 (see Figure 11), resulting in a strong lock that prevents the first arm 101 and the second arm 102 from coming off unintentionally. In this way, the tire 2 can be mounted on the wheel 8 using the tire mounting device 1 to which the auxiliary device 100 is attached.

[0048] The auxiliary device 100 of this embodiment prevents the second arm 102 from unintentionally detaching from the first arm 101, or the first arm 101 from unintentionally detaching from the rotating shaft 12, during the tire attachment and detachment process.

[0049] Although embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above, and various modifications and improvements are possible without departing from the spirit of the present invention. [Explanation of Symbols]

[0050] 1. Tire mounting / removal device 2 tires 3. Bead section 4. Rim section 5 hub holes 6 Hub section 7. Disc section 8 wheels 9. Front side bead 10 Wells 11. Zipper part 12 Rotation axes 13 Chuck Jaws 19 Bead Roller 21 Ears 52 Connecting plate 57 Guide plate 58 Receiving member 62 Chuck flange 65 Link member 68 Cylinder Case 72 pistons 77 Dividers 83 Slip Rings 85 Sprocket Wheel 86 chain 100 Auxiliary device for tire mounting / detachment (auxiliary device) 101 First Arm 102 Second Arm 103 Third Arm 104 Pad component 105 One end (first end) 105a Inner surface 106 Other end (second end) 107 One end (third end) 107a Inner surface 108 Other end (4th end) 109 One end (5th end) 110 Other end (6th end) 111 Pedestal 112 Contact pad 113 1st contact part 114 Second contact part 115 Protruding part (first stopper) 116 Protruding part (second stopper) 117 Flange nut 118 Holo Set 119 Flange nut 120 Holographic Set 121 Landmark 122 Landmark 123 Corner contact area L Rotation axis L1 1st axis L2 2nd axis M Motor

Claims

1. An auxiliary device for a tire mounting device, provided in a tire mounting device for removing a tire from a wheel or mounting a tire to a wheel, comprising: a chuck portion that fits into the hub hole of a wheel having a rim portion on which the bead portion of a tire sits and a disc portion having a hub portion in which a hub hole is formed, and grips the wheel in a manner that allows the wheel to be attached and detached; a rectangular cylindrical rotating shaft to which the chuck portion is connected and which is driven to rotate around a horizontal axis of rotation; and a rotation drive portion that rotates the rotating shaft around the axis of rotation, wherein the auxiliary device for a tire mounting device is provided in a tire mounting device for removing a tire from a wheel or attaching a tire to a wheel, A cylindrical first arm having one end that is inserted into and fitted onto the aforementioned rotating shaft, A cylindrical second arm having one end that is inserted into and fitted into the other end of the first arm, A third arm having one end fixed perpendicularly to the other end of the second arm, A pad member is provided at the other end of the third arm and protrudes toward one end of the first arm in the axial direction, An auxiliary device for a tire mounting and detaching device, comprising: a projection disposed at one end of the first arm and one end of the second arm, with at least a portion of which protrudes in the direction in which the third arm extends.

2. The auxiliary device for a tire mounting / detaching device according to claim 1, wherein the first arm and the second arm are rectangular tubular in shape.

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