JP6430862B2 - Tire removal clip, tire removal method and tire attachment method - Google Patents

Description

  The present disclosure relates to a tire detachment clip, a tire detachment method, and a tire attachment method used when the tire is detached from the tire wheel and the tire is attached to the tire wheel.

  Conventionally, the operation | work which removes a tire from a tire wheel using a tire changer is generally performed (refer patent document 1). As shown in FIG. 1 (perspective view), the tire changer 1 described in Patent Document 1 has a wheel mounting table 5 that supports a wheel on a body frame 3 so as to be fixed and rotatable. Are provided with a plurality of clamping jaws 7 capable of fixing the flanges of the tire wheels of the wheels to the wheel mounting table 5. A tilt column 9 extending upward is provided at the rear portion of the body frame 3 so as to be tiltable in the front-rear direction, and a swing arm 11 is attached to an upper portion of the tilt column 9 so as to extend forward. A shaft portion 13 extending in the vertical direction is provided at the front end portion of the swing arm 11 so that the vertical position can be adjusted, and a mounting head 14 is attached to the lower end portion of the shaft portion 13. The shaft portion 13 and the mounting head 14 are collectively referred to as “mounting tool 12” below.

  A tire break rubber pad 16 for stabilizing the wheel is provided on one side surface 3 a of the body frame 3, and the tire break rubber 17 is operated on the side surface 3 a on the rear side of the tire break rubber pad 16 while operating the bead break arm 17. A bead break shoe 18 capable of pressing the side portion is provided. A beat break pedal 19 for operating an air cylinder for moving the bead break shoe 18 is provided at the lower part of the front side surface 3b of the body frame 3.

  When the tire changer 1 is used to remove the tire from the tire wheel, first, a so-called bead dropping operation is performed to separate the tire bead of the tire in close contact with the flange of the tire wheel. In this bead dropping operation, the operator operates the bead break arm 17 after the wheels are arranged along the side surface 3a on one side of the body frame 3 and the wheels are stabilized in a state where the air in the tire is removed. While the bead break shoe 18 is inserted between the tire bead of the tire and the flange of the tire wheel, the tire bead and the flange are separated.

  Then, the bead-dropped wheel is placed on the wheel mounting table 5 of the tire changer 1 and fixed by the clamping jaw 7, the position of the mounting head 14 is adjusted with respect to the fixed wheel, and the nose of the mounting head 14 is adjusted. Lift up the tire bead on the front side of the tire while raising the tire lever, and remove the tire bead from the flange of the tire wheel. At this time, in order to easily lift the tire bead, the side of the tire opposite to the mounting head 14 is pushed downward by an upper pushing means (not shown) made of a roller or the like, and the tire bead is dropped on the tire wheel. Drop into. Then, the tire is removed from the tire wheel by the mounting head 14 while rotating the tire in this state.

JP 2001-105815 A

  By the way, recent tires have a high flatness ratio and extremely high rigidity on the side of the tire. Therefore, if the side of the tire opposite to the mounting head is not pushed downward by the upper pushing means, the tire bead is attached to the tire wheel. Can't be dropped into the drop.

  However, this upper pushing means is not necessarily provided in the tire changer, but is generally provided in the tire changer as an option. For this reason, when performing a tire detachment operation using a tire changer that is not provided with an upper pushing means, it is necessary for the operator to press the side portion of the tire, and the labor burden of this operation is extremely large for the operator. Further, when the upper pushing means is provided on the tire changer, the cost increases.

  For this reason, there has been a demand for a means that can be used in place of the upward pushing means and that can reduce the labor burden on the operator at a low cost.

  In view of the above circumstances, at least some embodiments of the present invention provide a tire attachment / detachment clip and a tire attachment / detachment method that can reduce the labor burden on an operator and are inexpensive when attaching / detaching a tire to / from a tire wheel. The purpose is to provide.

A tire detachment clip according to some embodiments of the present invention includes:
A pair of flanges projecting radially outward is provided at both axial ends of the rim body, and project radially outward on the outer peripheral surface of the rim body on the axially inner side of each of the pair of flanges. A pair of annular humps are provided, and attached to the rim body of the tire wheel provided with an annularly recessed drop on the outer peripheral surface of the rim body on the axially inner side of one of the pair of humps. A tire detachment clip used when the tire is detached, and the tire is attached to the rim body,
The first tire is inserted between a side portion of a tire mounted on the tire wheel and the flange of the tire wheel, and can contact the side surface of the tire side portion in a side view perpendicular to the axis of the tire wheel. A first insertion portion having a side contact surface portion, a first hump contact surface portion capable of contacting the outer periphery of the hump of the tire wheel, and a first flange contact surface portion capable of contacting the inner surface of the flange of the tire wheel;
A grip portion provided on a portion of the first wheel contact surface portion of the tire wheel that is not in contact with the inner surface of the flange;
The first insertion portion is formed in a triangular shape in a side view perpendicular to the axis of the tire wheel so that an angle formed by the first side contact surface portion with respect to the first hump contact surface portion is 45 ° to 60 °. Is formed.

  According to the tire attachment / detachment clip, the first insertion portion is configured so that an angle formed by the first side contact surface portion with respect to the first hump contact surface portion is 45 ° to 60 ° in a side view perpendicular to the axis of the tire wheel. Is formed. For this reason, when the tire is detached from the tire wheel using the tire attachment / detachment clip, the tire attachment / detachment is performed at each position close to the tire circumferential direction between the tire bead of the tire and the flange of the tire wheel to which the tire is attached. If the tire lever is inserted into the gap formed by pressing the side part of the tire on the side substantially opposite to the insertion position of the tire removal clip, causing the tire bead, The tire bead in contact with the first side surface portion can be dropped into the drop of the tire wheel while sliding on the first side surface portion. Therefore, the work of causing the tire bead by the tire lever is facilitated, and the tire bead can be easily detached from the flange.

  On the other hand, when a tire is mounted on a tire wheel, if the tire wheel is rotated with the tire demounting clip inserted between the tire bead and the tire wheel flange, the tire wheel rotates more than the tire demounting clip. A tire bead can be mounted on a flange of a tire wheel by a mounting head arranged on the front side in the direction. For this reason, it is not necessary to press the side part of the tire, the labor burden on the operator can be reduced, and the work of mounting the tire bead on the flange of the tire wheel can be facilitated. Therefore, when attaching and detaching the tire to and from the tire wheel, it is possible to reduce the labor burden on the operator and to realize a tire detachment clip that is inexpensive.

In some embodiments,
The height of the first hump contact surface portion of the first insertion portion is formed to be substantially the same as the height dimension from the inner surface of the flange to the drop in a side view perpendicular to the axis of the tire wheel. ing.

  In this case, the height of the first hump contact surface portion of the first insertion portion is substantially the same as the height dimension from the inner surface of the flange to the drop in a side view in the direction perpendicular to the axis of the tire wheel. Is inserted between the side portion of the tire and the flange of the tire wheel, the first flange contact surface portion contacts the inner surface of the tire wheel flange, and the first hump contact surface portion contacts the outer periphery of the tire wheel hump. In this state, the drop is located on the extension line of the first side contact surface portion. For this reason, the tire bead of the tire sliding on the first side contact surface portion can be reliably dropped into the drop.

In some embodiments,
The handle portion includes a connecting shaft portion protruding from the first flange contact surface portion of the first insertion portion, and a second insertion portion formed at a distal end portion of the connecting shaft portion,
The second insertion portion is formed in a triangular shape similar to the first insertion portion in a side view in a direction perpendicular to the axis of the tire wheel.

  In this case, the handle portion includes a connecting shaft portion that protrudes from the first flange contact surface portion of the first insertion portion, and a second insertion portion that is formed at the distal end portion of the connecting shaft portion. In the side view in the direction perpendicular to the axis of the tire wheel, it is formed in a triangular shape similar to the first insertion portion. For this reason, since the tire detachment clip has two insertion portions having different sizes, the tire detachment clip can be applied to types of wheels having different drop positions, and the application range of the tire detachment clip can be expanded.

In some embodiments,
The first insertion portion and the second insertion portion are integrally formed of a synthetic resin material.

  In this case, since the first insertion portion and the second insertion portion are integrally formed of a synthetic resin material, the first insertion portion and the second insertion portion are inserted between the tire side portion and the tire wheel flange. In doing so, the risk of damaging the tire wheel can be reduced.

Moreover, the tire disengagement method according to some embodiments of the present invention includes:
A tire detachment method for detaching a tire from a tire wheel using the tire detachment clip according to any one of claims 1 to 4,
By means of a lateral pushing means that presses the side portion of the tire, the tire bead and the tire of the tire are pressed by pressing each of the side portions on one side in the width direction of the tire at positions shifted by 180 degrees in the tire circumferential direction. The tire attaching / detaching clip is inserted into a gap formed between the flange of the attached tire wheel, and the side portion on the other side in the width direction of the tire is pressed by the laterally pressing means. A clip insertion step of inserting the tire detachment clip into each of the positions close to the tire circumferential direction in a gap formed between a bead and a flange of a tire wheel on which the tire is mounted;
A wheel fixing step of fixing the flange of the tire wheel on the side where a pair of tire demounting clips, which are arranged opposite to each other at a position shifted by 180 degrees in the tire circumferential direction, is fixed on the wheel mounting table of the tire changer;
A mounting head is fixed on a peripheral portion of the flange of the tire wheel on a side substantially opposite to an insertion position of the two tire detaching clips arranged close to each other in the circumferential direction, and the side portion of the tire and the flange of the tire wheel are fixed. Lever insertion process to insert the tire lever between,
While causing the tire lever inserted between the tire bead and the flange to act with the mounting head as a fulcrum, the tire bead in contact with the first side surface portion of the tire demounting clip is moved to the first side. A bead dropping step of sliding on the surface and dropping into the drop;
A bead detaching step of rotating the wheel mounting base in a state where the tire bead is caused by the tire lever and removing the tire bead from the flange over the entire circumference.

  According to the tire detaching method, when the tire is detached from the tire wheel, in the fourth step, the tire lever inserted between the tire bead and the flange is caused to cause the mounting head as a fulcrum, The tire bead in contact with the first side surface portion is slid on the first side surface portion and dropped into the drop. For this reason, it is possible to realize a tire detaching method in which the work of causing the tire bead by the tire lever is facilitated and the tire bead can be easily detached from the flange.

Further, a tire mounting method according to some embodiments of the present invention is a tire mounting method for mounting a tire on a tire wheel using the tire demounting clip according to any one of claims 1 to 4,
A tire is set on a tire wheel fixed on a wheel mounting table of the tire changer, and a tire bead on the inner side in the tire width direction is set on the inner side in the tire width direction by the mounting head of the tire changer while rotating the wheel mounting table in a predetermined direction. Inner bead mounting process to mount on the flange,
The flange on the outer side in the width direction of the tire wheel is brought close to the mounting head, and between the bead of the tire on the rear side in the rotation direction of the wheel mounting table and the flange on the outer side in the width direction of the tire wheel with respect to the mounting head The tire mounting / removal clip according to any one of claims 1 to 4 is inserted into the tire wheel, and the tire head on the outer side in the width direction of the tire is moved by the mounting head while rotating the wheel mounting base in a predetermined direction. And an outer bead mounting step of mounting on the outer flange in the width direction.

  According to the tire mounting method, when the tire is mounted on the tire wheel, when the tire wheel is rotated in the state where the tire demounting clip is inserted between the tire bead and the tire wheel flange according to the eighth step, The tire bead can be mounted on the flange of the tire wheel by the mounting head disposed on the front side in the rotational direction of the tire wheel relative to the tire detaching clip. For this reason, the operator does not need to press the side portion of the tire, and the labor burden on the operator can be reduced. Therefore, it is possible to realize a tire mounting method that can reduce the labor burden on the operator when mounting the tire on the tire wheel and that is inexpensive.

  According to at least some embodiments of the present invention, when attaching and detaching a tire to and from a tire wheel, a tire detachment clip, a tire detachment method, and a tire attachment that can reduce the labor burden on an operator and are inexpensive. It aims to provide a method.

It is a perspective view of the tire changer used when attaching / detaching a tire using the tire attaching / detaching clip which is one embodiment of the present invention. The figure (a) is a front view of a tire detaching clip, and the figure (b) is a bottom view of the tire detaching clip. It is a side view for demonstrating the method to fix a tire wheel to a tire changer. It is a partial perspective view of a wheel in the state where a tire detachment clip was inserted between a tire bead of a tire and a flange of a tire wheel. The figure (a) is a rear view of a wheel in which a tire detachment clip is inserted at a position opposite to the tire wheel, and the figure (b) is a tire detachment at a close position at a predetermined distance in the circumferential direction of the tire wheel. It is a front view of the wheel in which the clip was inserted. It is explanatory drawing of the operation | work which removes a tire from a tire wheel. It is a flowchart of the operation | work which removes a tire from a tire wheel. It is a flowchart of the operation | work which removes a tire from a tire wheel. It is a flowchart of the operation | work which mounts a tire on a tire wheel. It is a flowchart of the operation | work which fills a tire with air.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a tire detaching clip, a tire detaching method, and a tire mounting method according to the present invention will be described with reference to FIGS. It should be noted that the materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples.

  First, before describing the embodiment of the tire detaching method and the tire mounting method according to the present invention, the tire detaching clip according to the present invention will be described. Fig.2 (a) is a front view of a tire removal | desorption clip, FIG.2 (b) is a bottom view of a tire removal clip, FIG.3 (c) is a side view of a tire wheel. As shown in FIGS. 2 (a), 2 (b), and 3 (c), the tire attachment / detachment clip 30 is integrally formed of a synthetic resin material, and includes a first insertion portion 31 and a second insertion portion 40. Have.

  The first insertion portion 31 is formed in a triangular shape when viewed from the front, and the first side contact surface portion 32 that can contact the side surface of the side portion 60 a of the tire 60 and the front end portion of the hump 71 of the tire wheel 70 can be contacted. The first hump contact surface portion 33 and the first flange contact surface portion 34 that can contact the inner surface of the flange 72 of the tire wheel 70 are provided. The first insertion portion 31 is formed such that an angle θ formed by the first side contact surface portion 32 with respect to the first hump contact surface portion 33 is 60 °. The angle formed by the first flange contact surface portion 34 with respect to the first hump contact surface portion 33 is 90 °. The angle θ formed by the first side contact surface portion 32 with respect to the first hump contact surface portion 33 may be an angle at which a tire bead 60b (see FIG. 6A) described later can slide on the first side contact surface portion 32. For example, the angle is not limited to 60 °, and may be in the range of 45 ° to 60 °.

  The height h1 of the first hump contact surface portion 33 of the first insertion portion 31 extends from the inner surface of the flange 72 of the tire wheel 70 over the hump 71 to the tire wheel 70 as shown in FIG. 6A (side view). The provided drop 73 has substantially the same height as the dimension d up to the inner surface 73a. Details of the height h1 of the first hump contact surface portion 33 will be described later. A corner portion 35 where the first side contact surface portion 32 and the first flange contact surface portion 34 of the first insertion portion 31 intersect with each other is formed with a flat surface portion 36 extending substantially parallel to the first hump contact surface portion 33. The corner portion 35 may be formed in a convex shape as shown in FIG. In this embodiment, the corner 35 shown in FIG. 3C, FIG. 6A, FIG. 6B, and FIG. 6C indicates the first insertion portion 31 that is formed in a convex shape. .

  As shown in FIG. 2A, the second insertion portion 40 is formed in a triangular shape similar to the first insertion portion 31, and is inserted between the side portion 60 a of the tire 60 and the flange 72 of the tire wheel 70. The second side contact surface portion 41 that can contact the side surface of the side portion 60a of the tire 60, the second hump contact surface portion 42 that can contact the tip of the hump 71 of the tire wheel 70, and the inner surface of the flange 72 of the tire wheel 70 And a second flange contact surface portion 43 that can be contacted. The second insertion portion 40 is connected to the first insertion portion 31 via a connecting shaft portion 45 formed between the second flange contact surface portion 43 and the first flange contact surface portion 34 of the first insertion portion 31. They are connected together.

  The second hump contact surface portion 42 is provided on the opposite side of the first hump contact surface portion 33 with respect to the connecting shaft portion 45 and extends in a direction away from the first insertion portion 31 with respect to the second flange contact surface portion 43. The length h2 of the second hump contact surface portion 42 is shorter than the length h1 of the first hump contact surface portion 33 of the first insertion portion 31. The thickness w2 of the second insertion portion 40 is the same as the thickness w1 of the first insertion portion 31. In addition, when the 1st insertion part 31 is used for insertion, the 2nd insertion part 40 and the connection shaft part 45 serve as the handle part 46 which an operator grips, and when the 2nd insertion part 40 is used for insertion. The first insertion portion 31 and the connecting shaft portion 45 serve as a grip portion 46 held by the operator.

  Next, a tire detaching method for detaching the tire 60 attached to the tire wheel 70 using the tire detaching clip 30 and a tire attaching method for attaching the tire 60 to the tire wheel 70 will be described. Note that the tire changer 1 shown in FIG. 1 described above is used to perform the tire detachment and mounting method. The description of the tire changer 1 is omitted because it has been described above.

  First, a tire detaching method for detaching the tire 60 from the tire wheel 70 will be described with reference to FIGS. 1 and 3 to 8. As shown in FIG. 7 and FIG. 3A, a pre-work confirmation is performed before the separation work is performed (step 100). In the confirmation before work, 1. 1. Air of the tire 60 is completely removed. 2. the balance weight is removed from the tire wheel 70; It is confirmed that the tire 60 is cleaned.

  When the pre-operation confirmation is performed, it is confirmed whether or not the tire wheel 70 is EH2 (Extended Double Hump). That is, it is confirmed whether or not the hump 71 provided on the tire wheel 70 is high (step 101).

  Next, it is confirmed whether the type of the tire wheel 70 is a normal type or a reverse type (steps 102a and 102b). Here, the type of the tire wheel 70 is confirmed by the structure that the position of the drop 73 provided on the tire wheel 70 is closer to the disc in the normal type, and the position of the drop 73 is closer to the inner in the reverse type. Although there is a difference, even if there is a difference in this structure, the work of dropping the tire beat 60b into the drop 73 can be performed similarly.

  When the wheel type is confirmed, the tire attachment / detachment clip 30 is set to the tire 60 as preparation for performing the beat dropping operation (Step 103a, Step 103b, Step 103c, Step 103d). Here, as shown in FIG. 3A, the tire 60 is attached to the tire wheel 70 in a state where the tire beads 60 b of the tire 60 are fitted to the inner surfaces of the pair of flanges 72 of the tire wheel 70. In this state, the tire bead 60b of the tire 60 is in close contact with the inner surface of the flange 72 when placed on the wheel mounting table 5 of the tire changer 1 with the flange 72 on one side of the tire wheel 70 facing downward. Therefore, the clamping jaw 7 cannot pinch the flange 72 (see FIG. 3B).

  Therefore, as shown in FIG. 3C, when the first insertion portion 31 of the tire attachment / detachment clip 30 is inserted between the tire bead 60 b and the flange 72, clamping is performed between the tire bead 60 b and the flange 72. An annular gap 75 into which the jaw 7 can enter is formed. In order to form the annular gap 75, the two tire attachment / detachment clips 30 are arranged at positions shifted 180 degrees in the circumferential direction of the flange 72. That is, as shown to Fig.5 (a), the two tire removal | desorption clip 30 is arrange | positioned in the position which mutually opposes.

  To set the tire detaching clip 30, as shown in FIG. 4, the beat break pedal 19 (see FIG. 1) is operated to actuate the bead break shoe 18 and press the side portion 60a of the tire 60 to press the tire. A gap is formed between the bead 60b and the flange 72, and the first insertion portion 31 of the tire attaching / detaching clip 30 is inserted into the gap (step 103a). When the tire attachment / detachment clip 30 is set, as shown in FIG. 3C, the first flange surface portion 34 of the first insertion portion 31 contacts the inner surface of the flange 72 of the tire wheel 70 and the first hump contact surface 33. Comes into contact with the hump 71 formed on the rim body 74 of the tire wheel 70, and the tire bead 60 b of the tire 60 is deformed inward to contact the first side contact surface 32. Therefore, the bead dropping of the tire bead 60b inside the tire moves beyond the hump 71 to the inside of the tire wheel 70 is performed.

  On the other hand, on the surface side of the tire wheel 70, as shown in FIG. 5B, two tire attachment / detachment clips 30 are set at close positions having a predetermined distance in the circumferential direction of the tire wheel 70 (step 103a). ). As will be described in detail later, the two tire attachment / detachment clips 30 function to drop the tire bead 60b into the drop when the tire bead 60b of the front-side tire 60 is removed from the flange 72. The setting of the two tire attachment / detachment clips 30 on the front surface side of the tire wheel 70 is the same as the case of setting the tire attachment / detachment clip 30 on the rear surface side of the tire wheel 70 described above, and therefore the description thereof is omitted. . Note that step 103b, step 103c, and step 103d are the same as step 103a and will not be described.

  When the tire attachment / detachment clip 30 is set on the front side and the back side of the tire 60, the tire wheel 70 is tired with the back side of the tire wheel 70 facing downward as shown in FIG. 3 (c) and FIG. The tire wheel 70 is fixed on the wheel mounting table 5 by placing it on the wheel mounting table 5 of the changer 1 and sandwiching the flange 72 with the clamping jaw 7 (step 104a). In the case of the reverse type tire wheel 70, the tire wheel 70 is mounted and fixed on the wheel mounting table 5 with the surface side of the tire wheel 70 facing downward (step 104b).

  Then, as shown in FIGS. 8 and 6A, the tilt column 9 (see FIG. 1) is raised (step 105), the valve is adjusted (step 106), and the mounting tool 12 is fixed (step 107). The mounting position P of the mounting tool 12 is a position facing the two tire attachment / detachment clips 30 arranged close to each other. At the fixed position P, the mounting head 14 of the mounting tool 12 is positioned at the peripheral edge of the front-side flange 72 of the tire wheel 70. And bead cream is apply | coated to the tire bead 60b (step 108). And the front-end | tip part of the tire lever 62 is inserted between the flange 72 and the tire bead 60b from the downward direction of the mounting head 14, and as shown in FIG.6 (b), FIG.6 (c) FIG. The tire bead 60b contacting the first side surface portion 32b of the tire attachment / detachment clip 30 is slid onto the first side surface portion 32b and dropped into the drop 73 while causing the mounting head 14 as a fulcrum (step 109). ).

  Then, in a state where the tire bead 60b is caused by the tire lever 62, the wheel mounting table 5 is rotated, and the tire bead 60b is removed from the flange 72 over the entire circumference (step 110). Then, the tire bead 60b 'is removed from the flange 72 over the entire circumference using the mounting head 14 and the tire lever 62 in the same manner as the front tire bead 60b (step 111). Then, the mounting tool 12 is removed, and the work for removing the tire 60 is completed (step 112).

  Next, a tire mounting method for mounting a new tire 60 on the tire wheel 70 will be described. First, as shown in FIG. 9, bead cream is applied to the tire bead 60b of the new tire 60 (step 113), and when the tire 60 has the front and back, the front and back of the tire 60 are confirmed (step 114). Then, after adjusting the position of the valve (step 115), the tire wheel 70 is set so as to cover the tire 60 (step 116). Then, the mounting tool 12 is fixed (step 117), and the tire bead 60b on the back side of the tire 60 is fitted inside the rim body 74 by the mounting head 14 while the wheel mounting table 5 is rotated clockwise. Then, it is mounted on the flange 72 on the inner side in the width direction (step 118).

  Then, the flange 72 on the outer side in the width direction of the tire wheel 70 is brought close to the mounting head 14, and the tire beads 60 b of the tire 60 and the outer side in the width direction of the tire wheel 70 on the rear side in the rotation direction of the wheel mounting table 5 relative to the mounting head 14. The tire attachment / detachment clip 30 is inserted between the flange 72 and the wheel mounting base 5 is rotated in the clockwise direction, and the tire beads 60b on the outer side in the width direction of the tire 60 are moved by the mounting head 14 on the outer side in the width direction of the tire wheel 70. Is mounted on the flange 72 (step 119).

  Thus, when the tire wheel 70 is rotated in a state where the tire demounting clip 30 is inserted between the tire bead 60 b of the tire 60 and the flange 72 of the tire wheel 70, the tire wheel 70 is more than the tire demounting clip 30. The tire bead 60b can be mounted on the flange 72 of the tire wheel 70 by the mounting head 14 disposed on the front side in the rotation direction. Moreover, the operation | work which pushes the side part 60a of the tire 60 can be eliminated by insertion of the tire removal | desorption clip 30, and an operator's labor can be reduced. For this reason, the work which mounts tire bead 60b on flange 72 of tire wheel 70 can be made easy.

  Then, the mounting tool 12 is removed, and the mounting operation of the tire 60 is completed (step 120). As shown in FIG. 10, in steps 122 to 126, an operation of filling the tire 60 with air is performed, and the replacement operation of the tire 60 is completed.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the object of the present invention.

DESCRIPTION OF SYMBOLS 1 Tire changer 3 Body frame 5 Wheel mounting base 7 Clamping jaw 9 Tilt column 11 Swing arm 12 Mounting tool 13 Shaft part 14 Mounting head 16 Tire break rubber pad 17 Bead break arm 18 Bead break shoe 19 Bead break pedal 30 Tire attachment / detachment clip 31 1st insertion part 32 1st side contact surface part 33 1st hump contact surface part 34 1st flange contact surface part 35 corner part 36 plane part 40 2nd insertion part 41 2nd side contact surface part 42 2nd hump contact surface part 43 2nd flange Contact surface portion 45 Connecting shaft portion 46 Handle portion 60 Tire 60a Side portion 60b Tire bead 62 Tire lever 70 Tire wheel 71 Hump 72 Flange 73 Drop 73a Inner surface 74 Rim body portion 7 Gap

Claims (6)

A pair of flanges projecting radially outward is provided at both axial ends of the rim body, and project radially outward on the outer peripheral surface of the rim body on the axially inner side of each of the pair of flanges. A pair of annular humps are provided, and attached to the rim body of the tire wheel provided with an annularly recessed drop on the outer peripheral surface of the rim body on the axially inner side of one of the pair of humps. A tire detachment clip used when the tire is detached, and the tire is attached to the rim body,
The first tire is inserted between a side portion of a tire mounted on the tire wheel and the flange of the tire wheel, and can contact the side surface of the tire side portion in a side view perpendicular to the axis of the tire wheel. A first insertion portion having a side contact surface portion, a first hump contact surface portion capable of contacting the outer periphery of the hump of the tire wheel, and a first flange contact surface portion capable of contacting the inner surface of the flange of the tire wheel;
A grip portion provided on a portion of the first wheel contact surface portion of the tire wheel that is not in contact with the inner surface of the flange;
The first insertion portion is formed in a triangular shape in a side view perpendicular to the axis of the tire wheel so that an angle formed by the first side contact surface portion with respect to the first hump contact surface portion is 45 ° to 60 °. A tire attaching / detaching clip characterized by being formed into. The height of the first hump contact surface portion of the first insertion portion is substantially the same as the height dimension from the inner surface of the flange to the drop in a side view perpendicular to the axis of the tire wheel. The tire attaching / detaching clip according to claim 1. The handle portion includes a connecting shaft portion protruding from the first flange contact surface portion of the first insertion portion, and a second insertion portion formed at a distal end portion of the connecting shaft portion,
The tire attachment / detachment clip according to claim 2, wherein the second insertion portion is formed in a triangular shape similar to the first insertion portion in a side view in a direction perpendicular to the axis of the tire wheel. The tire attachment / detachment clip according to claim 3, wherein the first insertion portion and the second insertion portion are integrally formed of a synthetic resin material. A tire detachment method for detaching a tire from a tire wheel using the tire detachment clip according to any one of claims 1 to 4,
By means of a lateral pushing means that presses the side portion of the tire, the tire bead and the tire of the tire are pressed by pressing each of the side portions on one side in the width direction of the tire at positions shifted by 180 degrees in the tire circumferential direction. The tire attaching / detaching clip is inserted into a gap formed between the flange of the attached tire wheel, and the side portion on the other side in the width direction of the tire is pressed by the laterally pressing means. A clip insertion step of inserting the tire detachment clip into each of the positions close to the tire circumferential direction in a gap formed between a bead and a flange of a tire wheel on which the tire is mounted;
A wheel fixing step of fixing the flange of the tire wheel on the side where a pair of tire demounting clips, which are arranged opposite to each other at a position shifted by 180 degrees in the tire circumferential direction, is fixed on the wheel mounting table of the tire changer;
A mounting head is fixed on a peripheral portion of the flange of the tire wheel on a side substantially opposite to an insertion position of the two tire detaching clips arranged close to each other in the circumferential direction, and the side portion of the tire and the flange of the tire wheel are fixed. Lever insertion process to insert the tire lever between,
While causing the tire lever inserted between the tire bead and the flange to act with the mounting head as a fulcrum, the tire bead in contact with the first side surface portion of the tire demounting clip is moved to the first side. A bead dropping step of sliding on the surface and dropping into the drop;
A bead removing step of rotating the wheel mounting base and removing the tire bead from the flange over the entire circumference in a state where the tire bead is caused by the tire lever. Method. A tire mounting method for mounting a tire on a tire wheel using the tire demounting clip according to any one of claims 1 to 4,
A tire is set on a tire wheel fixed on a wheel mounting table of the tire changer, and a tire bead on the inner side in the tire width direction is set on the inner side in the tire width direction by the mounting head of the tire changer while rotating the wheel mounting table in a predetermined direction. Inner bead mounting process to mount on the flange,
The flange on the outer side in the width direction of the tire wheel is brought close to the mounting head, and between the bead of the tire on the rear side in the rotation direction of the wheel mounting table and the flange on the outer side in the width direction of the tire wheel with respect to the mounting head An outer bead for mounting a tire bead on the outer side in the width direction of the tire to a flange on the outer side in the width direction of the tire wheel by the mounting head while inserting the tire detaching clip into the wheel and rotating the wheel mounting base in a predetermined direction. A tire mounting method comprising: a mounting step.

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