JP4018688B2 - Tire attachment / detachment device - Google Patents

Description

  The present invention relates to a tire attaching / detaching device for attaching / detaching a tire to / from a wheel.

Conventionally, as a method of attaching the tire to the wheel, after placing the lower bead portion of the tire in a sideways state on the drop center of the wheel, the upper bead portion is locked to the tire nail and in the vicinity of the tire nail. It is known that the upper bead portion is fitted into the wheel by rotating the rotary table while pressing the sidewall portion of the tire or the vicinity thereof by the mounting roller disposed at the rear of the tire rotation direction (for example, Patent Documents). 1).
Further, a pair of disc-shaped rollers that act on both bead portions of a tire in a sideways state is known that is pressed simultaneously by both rollers (see, for example, Patent Document 2).
Japanese Patent No. 2724661 JP-T-2-500101

The mounting roller of Patent Document 1 has a substantially cylindrical shape that is arranged in a substantially radial direction of the tire and rotates around a single axis. When the tire is pressed by the mounting roller, Is a circular arc having a small radius of curvature when viewed from the radial direction and an elongated pressing force is applied in the radial direction, and a large surface pressure is applied. Therefore, when a hard tire such as a run-flat tire, which has been increasing in recent years, is inserted, damage is likely to occur in the bead portion and the sidewall portion.
Further, as described above, since the range of pressing by the mounting roller is small (narrow) with respect to the tire rotation direction, the bead portion and the sidewall portion once fitted into the wheel are the drop center or the pressing center pressed by the mounting roller. There is a problem that it floats from the vicinity and is returned to the bead seat portion of the wheel.
In addition, hard tires such as run-flat tires are particularly hard on the outer diameter side of the sidewall, but the mounting roller is tapered so that the inner diameter side in the radial direction of the tire is thickened, so a hard tire is fitted. It is not suitable for putting in.
Also in Patent Document 2, the tire is subjected to a large surface pressure from the disk-shaped roller, the tire is easily damaged, and the bead portion and the sidewall portion fitted into the wheel are pushed in by the mount roller. There is a problem that it floats up from or near the dropped drop center and is returned to the bead seat portion of the wheel.

  Therefore, the present invention can be fitted into the wheel without damaging the tire by pressing the side portion of the tire with a low surface pressure, and the bead portion fitted into the wheel is returned to the bead seat portion. An object of the present invention is to provide a tire attaching / detaching device that does not end up.

In order to achieve the above-mentioned object, a tire attaching / detaching device according to the present invention is used to drop a bead portion into a drop center of a wheel by approaching and pressing the sidewall portion of the tire in a sideways state or the vicinity thereof from above. The pressing means includes a plurality of rotatable self-rotating lines arranged in parallel in a substantially radial direction of the tire as viewed in plan so that a plurality of pressing means simultaneously press the sidewall portion of the tire or the vicinity thereof. A rolling rod-shaped body, and the rolling rod-shaped body are rotatably held and pressed with a small second curvature radius after approaching the tire rotation direction with a small first curvature radius when viewed from the radial direction of the tire. Revolving guide means for guiding the vehicle so as to draw a revolving trajectory that is separated with a small third radius of curvature after being accompanied.

It is also preferable that the first radius of curvature is set to be larger than the third radius of curvature, and the lower side portion of the first radius of curvature protrudes greatly downward.
Each rolling rod-like body is formed in a cylindrical shape.
Alternatively, each rolling rod-like body is formed in a tapered cylindrical shape whose diameter is increased outward in the radial direction of the tire.

  Further, the revolution guide means includes shaft protrusions protruding from both end faces of each rolling rod-like body, and a guide concave circumferential groove having a groove bottom surface that the rolling rod-like body contacts while rotating and revolving. And a holding member having an endless groove portion into which the shaft protrusion is fitted on the opposite groove side surface of the guide concave circumferential groove.

  Alternatively, the revolution guide means includes shaft protrusions projecting on both end faces of each rolling rod-like body, a guide concave circumferential groove having a groove bottom surface that the rolling rod-like body contacts while rotating and revolving, and A pair of endless link chain members that connect the one-side shaft protrusion and the other-side shaft protrusion of the rolling rod-like body in a rotatable manner.

  Alternatively, each rolling rod-like body is formed in a substantially cylindrical shape, and further, the revolution guide means includes a constricted portion formed in the middle of each rolling rod-like body in the axial center direction, and the rolling rod-like body rotates. And a holding member that has a contact surface that makes contact while revolving and has an outer flange-shaped shift prevention portion that protrudes from the contact surface and is inserted into the constricted portion of each rolling rod-like body, and all the rolling rod shapes And a locking member that surrounds the constricted portion of the body.

  Further, when the revolution trajectory drawn by the rolling rod-like body is viewed from the radial direction, a tangent line of the side wall portion or a portion contacting the vicinity thereof has a predetermined inclination angle with respect to a horizontal plane.

  Further, a tangent of a portion where the rolling rod-like body abuts on the sidewall portion or the vicinity thereof has a predetermined inclination angle with respect to a horizontal plane when viewed from the rotation direction of the tire.

  The tire attaching / detaching device according to the present invention further includes a pressing means for pressing the side wall portion of the tire in a sideways state or the vicinity thereof from above and pressing the bead portion into the drop center of the wheel. The means is adapted to approach with a small first curvature radius in the tire rotation direction when viewed from the radial direction of the tire and then follow while pressing with a large second curvature radius and then separate with a small third curvature radius. An endless belt member for pressing the sidewall portion of the tire or the vicinity thereof is provided.

The present invention has the following remarkable effects.
The tire attaching / detaching device of the present invention includes a pressing means for pressing a tire in a sideways state and dropping a bead portion into a drop center of the wheel, and the pressing means includes a plurality of tires at the same time or in the vicinity of the sidewall portion of the tire. The tire includes a plurality of rolling rod-like bodies that are rotatable and arranged in parallel in a substantially radial direction of the tire as viewed in a plan view. A wide pressing range formed by the rod-shaped body can always be pressed, and the upper bead portion once fitted into the drop center of the wheel is not lifted back to the bead seat portion of the wheel. And the surface pressure which a tire receives is low, and damage to a tire at the time of pressing can be prevented. In addition, the rolling rod-like body can be brought into and out of contact with the tire very smoothly, and the working efficiency is improved.
Furthermore, since the rolling rod-like body revolves while rotating with the rotation of the tire, the frictional resistance with the tire becomes extremely small and can be fitted smoothly.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
In one embodiment of the tire attaching / detaching device according to the present invention shown in FIG. 1 to FIG. 7, this device attaches / detaches the tire 2 by rotating the wheel 1, and the side of the tire 2 in the sideways state. A pressing means 5 is provided for pressing the bead portion 20 into the drop center 21 of the wheel 1 by approaching and pressing the wall portion 22 or the vicinity thereof from above.
The wheel 1 is fixed on a rotary table 40 (rotating clockwise in plan view) by a plurality of chuck claws 41 attached so as to be movable in the radial direction, and is held rotatably.
42 is a tire claw for engaging the bead portion 20 of the tire 2 and fitting it into the wheel 1, and this tire claw 42 is configured to be able to approach and separate from the wheel 1 (tire 2), It arrange | positions so that it may be suitable for the wheel 1 (tire 2) of various sizes (refer FIGS. 1-3).

The pressing means 5 is disposed behind the tire claws 42 (in the tire rotation direction 10).
Explaining the mounting structure, an arm 45 is pivotally mounted in a hollow column 43 provided vertically in the apparatus so as to be reciprocally movable (vertical direction) on a vertical shaft 44. The hollow column 43 is provided with a notch hole portion 46 in the vertical direction, and the mounting piece 47 fixed to the side surface of the arm 45 is connected to the vertical shaft 44 inside the hollow column 43 from the notch hole portion 46. It is attached and can move up and down along the vertical axis 44 and can swing around the vertical axis 44. The pressing means 5 is disposed at the tip of the arm 45 via the mounting plate 48, and can approach and separate from the wheel 1 (tire 2).

The pressing means 5 is provided with a plurality of rolling rod-like bodies 7 that can rotate freely so that a plurality of the pressing means 5 simultaneously press the sidewall 22 of the tire 2 or the vicinity thereof. The rolling rod-like bodies 7 are arranged in parallel in the substantially radial direction T of the tire 2 when viewed in a plan view, and each has an elongated cylindrical shape.
Further, the pressing means 5 holds the rolling rods 7 in a freely rotatable manner, and when the pressing means 5 approaches the rotational direction 10 of the tire 2 with a small first curvature radius R _{1 when} viewed from the radial direction T of the tire 2, Revolution guiding means 3 is provided for guiding the vehicle so as to draw a revolution locus 4 which is accompanied by a small third curvature radius R ₃ while being pushed while being pressed at a curvature radius R ₂ .
In addition, as can be seen from FIGS. 6 and 5 and the like, in the present invention, the revolution locus 4 is defined as indicating an envelope drawn while the rolling rod-like bodies 7 revolve.
The revolution guide means 3 is a groove bottom surface 30 in which the small cylindrical shaft projections 8 and 8 projecting from both end faces 7a and 7a of each rolling rod-like body 7 and the rolling rod-like body 7 come into contact with each other while rotating and revolving. And a holding member 34 having endless groove portions 33 and 33 into which the shaft protrusions 8 and 8 are fitted on the opposite groove side surfaces 32 and 32 of the guide groove groove 31. .

More specifically, the holding member 34 is provided in the radial direction T from the center position of the surface of the clamping surface portion 15 provided in the lower part of the mounting plate 48 and formed perpendicular to the radial direction T of the tire 2. And a projecting belt-like core portion 6. When viewed from the radial direction T, the outer peripheral surface 6a of the core portion 6 is formed so that the upper and lower surfaces are horizontal and flat, and both sides are formed in a semicircular arc shape (in an elongated oval shape).
Further, the holding member 34 has a cover plate body 9 that is bolted and nut-coupled to the front end surface 6 b of the core portion 6. 27 is a female screw hole formed in the front end surface 6 b of the core 6, and 28 is inserted into the hole formed in the cover plate body 9 from the front end surface 9 a side and screwed into the female screw hole 27. It is a bolt member. The tip side is defined as the inner diameter direction of the tire 2 in the radial direction T.

That is, the guide concave circumferential groove 31 of the revolution guide means 3 is composed of the core portion 6, the cover plate body 9, and the clamping surface portion 15, and the groove bottom surface (the rolling rod-like body 7 contacts while rotating and revolving). 30 corresponds to the outer peripheral surface 6 a of the core 6.
The groove side surfaces 32 and 32 correspond to the sandwiching surface portion 15 and the base end surface 9b of the cover plate body 9, and the endless groove portions 33 and 33 are formed respectively. Each endless groove 33 is formed so as to have a width slightly larger than the outer diameter of each small cylindrical shaft protrusion 8, and when viewed from the radial direction T of the tire 2, a pair of upper and lower parts that are horizontally elongated. The straight part and the rounded part connecting the straight part in a curved shape on both sides, respectively, are formed into an annular shape (elongated) and an oval shape. The revolution trajectory 4 of the rolling rod-like bodies 7 corresponds to the envelope of the rolling rod-like bodies 7 guided along the endless groove 33.
Of the rolling rods 7 that revolve around the core 6, four rolling rods 7 are positioned on the lower surface side of the core 6 in FIG. 5. That is, the four rolling rod-like bodies 7 ... always press the tire 2.

Next, in another embodiment shown in FIG. 8 and FIG. 9, the tire attaching / detaching device is provided at the lower portion of the mounting plate 48 with the holding surface portion 15 and the strip plate core similar to those explained in FIG. 4 and FIG. A portion 6 is provided, and a cover plate body 25 is connected to the front end surface 6 b of the core portion 6 by bolts and nuts. 4 and 5, the endless groove 33 is not formed in the cover plate body 25 and the clamping surface portion 15.
The revolution guide means 3 of this apparatus has a pair of endless link chain members 11, 11 that connect the one-side shaft projection 8A and the other-side shaft projection 8B of each rolling rod-like body 7 so as to be able to rotate.
18 is a link small plate piece having pivot support hole portions 18a and 18a into which the shaft projections 8 and 8 of the adjacent rolling rod-like bodies 7 and 7 are rotatably fitted, and each link chain member 11 includes a plurality of link chain members 11. Are formed by being alternately and annularly connected in the radial direction T.

Next, in another embodiment of the present invention shown in FIGS. 10 and 11, the difference between the tire attaching / detaching device and the device shown in FIGS. 4 and 5 is that each rolling rod-like body 7 is a tire. The endless groove 33 formed on the sandwiching surface portion 15 is formed in a tapered columnar shape whose diameter increases outward in the radial direction T of the groove 2 than the groove 33 formed in the cover plate body 9. The circumference length is large.
The rolling rod-like bodies 7... Press the sidewall portion 22 of the tire 2 or the vicinity thereof in a fan-shaped range (expanding radially outward in the radial direction T of the tire 2) in plan view. Further, the lower side portion 37 of the rolling rod-like bodies 7 revolving around the lower side of the core portion 6 is inclined at an acute angle φ with respect to the horizontal plane H, and the tire 2 is pressed so that the tread portion 23 side sinks deeply. . The acute angle φ is preferably 1 ° to 10 °.

Next, in the tire attaching / detaching device of still another embodiment shown in FIGS. 12 and 13, the pressing means 5 includes a plurality of rolling rod-like bodies 7 that can freely rotate, and a plurality of the pressing means 5 press the tire 2 at the same time. ... and comprises rolling rod-shaped bodies 7 ... are arranged in plan view in a substantially radial direction T of the tire 2, respectively, (described below) the axis L ₇ medial to the constricted portion 51 is formed It is a long and thin substantially cylindrical shape.
Further, revolving guiding means 3 has a constricted portion 51 formed in the axial L ₇ medial of each rolling rod-like body 7, each of which has a contact surface 52 that the rolling rod-shaped bodies 7 are in contact while rotating and revolving A holding member 54 in which an outer flange-like displacement prevention portion (locking circumferential convex portion) 53 inserted into the constricted portion 51 of the rolling rod-like body 7 is provided protruding from the contact surface 52, and the constricted portion 51 of the rolling rod-like body 7. And a locking member 55 that surrounds. Specifically, the holding member 54 has a band plate-like core portion 56 that is provided in the lower portion of the mounting plate 48 and formed in the radial direction T of the tire 2. When viewed from the radial direction T, the outer peripheral surface 56a of the core portion 56 is formed in a flat shape whose upper and lower surfaces are horizontal, and both sides are formed in a semicircular arc shape (in an elongated oval shape), and the radial direction T At the intermediate position, the outer hook-shaped deviation preventing portion 53 is projected from the outer peripheral surface 56a. That is, the contact surface 52 of the revolution guiding means 3 corresponds to the outer peripheral surface 56 a of the core portion 56.
In each rolling rod-like body 7, the constricted portion 51 has the same axis L ₇ as the large diameter portion (with which the outer peripheral surface 56a of the core portion 56 abuts) and is formed in a small cylindrical shape. And the space | interval of the outer peripheral surface of the slip prevention part 53 and the inner peripheral surface of the locking member 55 is set slightly larger than the outer diameter of the constriction part 51 of each rolling rod-shaped body 7, and each rolling rod-shaped body 7 can rotate and revolve.

Next, FIGS. 14, 15 and 16 show still another embodiment of the tire attaching / detaching device. The difference from the devices of FIGS. 12 and 13 is that the revolution guiding means 3 has a first radius of curvature R _1. Is set to be larger than the _third radius of curvature R ₃ and the lower side portion 70 of the _first radius of curvature R ₁ is guided so as to protrude greatly downward.
Specifically, when the core portion 56 is viewed from the radial direction T, the outer peripheral surface 56a is formed in a vertical shape with a horizontally flat upper surface portion 71 and a curved shape curving downward from one end of the upper surface portion 71 downward. The side surface 72 is formed in an upwardly inclined shape with respect to the rotation direction 10 of the tire 2 while curving in a round shape from the lower end of the side surface portion 72 and connected to the other end of the upper surface portion 71 while curving in a round shape. And an inclined surface portion 73. In other words, the outer peripheral surface 56a is formed in a substantially right triangle shape having corner portions bent in a round shape.
In FIGS. 14 and 15, the core portion 56 is a pair of half members 56X at the intermediate position in the radial direction T, instead of being provided with the shift preventing portion 53 on the outer peripheral surface 56a of the core portion 56. , 56Y, and a slip prevention plate body 57 is sandwiched between the pair of half members 56X, 56Y (showing the same action as the outer hook-shaped slip prevention portion 53 of FIGS. 12 and 13), It is fixed with bolts.

Next, FIGS. 17 and 18 and FIG. 19 each show a tire attaching / detaching device according to yet another embodiment. In each device, the rolling rod-like body 7 comes into contact with the sidewall portion 22 or the vicinity thereof. , And an angle adjusting means 60 for changing and fixing the inclination angle from the horizontal plane H.
First, in the apparatus shown in FIGS. 17 and 18, when the revolution locus 4 drawn by the rolling rod-like bodies 7... Is viewed from the radial direction T (of the tire 2), the portion contacting the sidewall portion 22 or the vicinity thereof. The tangent line 49 has a predetermined inclination angle θ ₁ with respect to the horizontal plane H. The inclination angle θ ₁ is desirably 1 ° to 10 °.
In this apparatus, the clamping plate body 68 (having the clamping surface portion 15 in FIG. 4) is formed separately from the mounting plate 48, and the angle adjusting means 60 includes the clamping plate body 68. A holding shaft portion 64 that extends outward in the radial direction T and has an external thread formed on the outer peripheral surface thereof, and a hole portion 63 that is formed below the mounting plate 48 and into which the holding shaft portion 64 is inserted. And a nut member 65 screwed onto the holding shaft portion 64. After the inclination angle θ ₁ is adjusted to a desired value, the nut member 65 is tightened and fixed.

Next, in the apparatus of FIG. 19, a tangent line 39 where the rolling bar 7 contacts the sidewall portion 22 or the vicinity thereof is predetermined with respect to the horizontal plane H when viewed from the rotation direction of the tire 2. And an inclination angle θ ₂ . The inclination angle θ ₂ is desirably 1 ° to 15 °.
17 and 18 is that the hole 63 of the mounting plate 48 is formed to be larger than the outer diameter of the holding shaft 64, and the angle adjusting means 60 is different from the holding shaft 64. A mounting plate having a first tapered washer member 61 having a hole 61a to be inserted and clamped between the clamping plate 68 and the mounting plate 48, and a hole 62a in which the holding shaft 64 is inserted. And a second tapered washer member 62 sandwiched between the nut member 65 and the nut member 65.
The first and second tapered washer members 61 and 62 have the same shape, and both are formed in a tapered shape when viewed from the side. And when it sees from the rotation direction of the tire 2, the 1st taper washer member 61 is arrange | positioned by making a thick side into a lower side, and the 2nd taper washer member 62 makes a thick side as an upper side, Arranged. If it arrange | positions in this way, the press means 5 will be able to press the tire 2 so that the tread part 23 side may sink deeply. An anti-slip bevel groove may be formed on the contact surface of each tapered washer member 61, 62 to prevent rotation during use (not shown).
If a plurality of types of first and second tapered washer members 61 and 62 formed in a tapered shape with various thicknesses are prepared, the inclined angle θ ₂ is adjusted to a desired size by selectively holding the members. it can.

Next, the apparatus shown in FIGS. 20 and 21 has a large second curvature after the pressing means 5 approaches the rotational direction 10 of the tire 2 with a small first curvature radius R _{1 when} viewed from the radial direction T of the tire 2. An endless belt member 14 is provided that presses the sidewall portion 22 of the tire 2 or the vicinity thereof so as to be accompanied by a small third radius of curvature R ₃ while being pushed while being pressed at a radius R ₂ .
Specifically, a holding surface portion 15 perpendicular to the radial direction T of the tire 2 is formed at the lower portion of the mounting plate 48, and a pair of elongated cylindrical shapes are formed on the holding surface portion 15 in the substantially radial direction T of the tire 2. The shaft core parts 16, 16 are juxtaposed at the same height position. A pair of cylindrical bearing members 13 and 13 and a cylindrical pulley 12 are externally fitted to each axial core portion 16 in order.
An endless belt member 14 (made of rubber, resin, or the like) is wound around the pulleys 12 and 12. And, the outer peripheral surface of each pulley 12, the axis L ₁₆ direction intermediate position, the circumferential groove 12a is recessed, and the endless belt member 14 has, on its inner surface, the circumferential protrusion 14a is protruded. The circumferential protrusions 14a of the belt member 14 are fitted into the circumferential groove portions 12a and 12a of the pulleys 12 and 12, so that the belt member 14 does not shift in the radial direction T.
Further, the shaft core portions 16, 16 are formed with fitting grooves 35, 35 on the distal end side of the outer peripheral surface thereof, and after the pulley 12 is fitted externally, the annular locking member 36 is fitted with the fitting grooves 35, 35, Fits in 35.
Although not shown in the drawing, the belt may be a timing belt or a V-belt, and may be prevented from coming off by using the come-off preventing member 36 as an end plate. Further, the circumferential protrusion 14a of the belt member 14 may be a belt side flange, and the bearing member 13 may be a metal or a bearing.

Next, a method and an operation for attaching the tire will be described.
As shown in FIG. 3, the tire 2 is placed on the wheel 1 fixed to the rotary table 40 via chuck claws 41, and the lower bead portion 20 b of the tire 2 is locked to the tire claws 42. The rotary table 40 (wheel 1) is turned (see FIG. 2), and the lower bead portion 20b is fitted into the wheel 1.
Then, as shown in FIG. 7, the tire claws 42 are pressed while pressing the sidewall portion 22 of the tire 2 or the vicinity thereof with the pressing means 5 in a state where the lower bead portion 20 b is dropped into the drop center 21 of the wheel 1. Through.

4 and 5, the pressing operation by the pressing means 5 will be described. As the tire 2 is rotated in the rotational direction 10, the rolling rod-like body 7 that contacts the tire 2 is indicated by an arrow 19. In this way, it revolves around the core 6 while rotating. Then, force is applied to the rolling rod-like bodies 7 from the lower surface of the outer peripheral surface 6a of the core portion 6, and the tire 2 is pressed.
As shown in FIG. 6, the (four) rolling rod-like bodies 7... That press the tire 2 first have a first radius of curvature R that is small in the rotational direction 10 of the tire 2 when viewed from the radial direction T of the tire 2. Closely abut at ₁ and then follow while pressing at a sufficiently large second radius of curvature R ₂ and then separated at a small third radius of curvature R ₃ (drawing such an envelope).
The mounting roller of Patent Document 1 (described above) presses the tire with a semicircular arc-shaped surface having a small radius of curvature when viewed from the radial direction, whereas the apparatus shown in FIGS. In this case, the pressing means 5 presses in a wide range in the circumferential direction (tire rotation direction) as described above. Therefore, there is no problem that the upper bead portion 20a once dropped into the drop center 21 of the wheel 1 is returned to the bead sheet portion 26 again (see FIGS. 2 and 7).
Further, the surface pressure received by the sidewall 22 of the tire 2 or the vicinity thereof is low as indicated by an arrow 17 (in FIG. 6B), and the tire 2 is hardly damaged.
Note that to obtain the same effects at the mount roller Patent Document 1 requires a large circular mount roller radius R ₂ (reference numeral 50), it is understood that the baffle of the tire removing operations.

8 and 9 and the devices of FIGS. 12 and 13, the tire 2 is fitted by the same action as the pressing means 5 of the devices of FIGS.
The pressing means 5 of the apparatus of FIGS. 10 and 11 has the same operation as that of the pressing means 5 of FIGS. 4 and 5, but this rolling rod-like body 7. Press to sink deeply along the radial direction. Therefore, even if the sidewall portion 22 such as a run flat tire is a very hard tire, the sidewall portion 22 or its vicinity can be reliably pressed and fitted into the wheel 1.
14, 15, and 16 have the same action as the pressing means 5 of FIGS. 4 and 5, but the sidewall portion 22 or the vicinity thereof can be pressed more widely and deeply, Even a hard tire can be securely fitted into the wheel 1.

In the apparatus of FIG. 17, FIG. 18, or FIG. 19, the installation angle to the tire can be freely selected or adjusted depending on the shape and hardness of the tire, thereby allowing various tire rim sets to be used. It can respond efficiently.
Next, in the pressing means 5 of the apparatus of FIGS. 20 and 21, the endless belt member 14 presses the side wall portion 22 or the vicinity thereof along with the tire 2 as the tire 2 rotates.
Although not shown in the figure, when the operation of removing the tire 2 from the wheel 1 is performed, the pressing means 5 is used to press the sidewall portion 22 of the tire 2 or the vicinity thereof.

As described above, the tire attaching / detaching device according to the present invention drops the bead portion 20 into the drop center 21 of the wheel 1 by approaching and pressing the side wall portion 22 of the tire 2 lying sideways or the vicinity thereof from above. The pressing means 5 includes a plurality of pressing means 5, and a plurality of the pressing means 5 are rotatable in parallel so as to be arranged in the substantially radial direction T of the tire 2 as viewed in plan so that a plurality of the pressing means 5 press the sidewall portion 22 of the tire 2 or the vicinity thereof. A plurality of rolling rod-like bodies 7, so that the sidewall portions 22 of the tire 2 or the vicinity thereof are formed by a plurality of rolling rod-like bodies 7. The upper bead portion 20a once fitted into the drop center 21 of the wheel 1 can no longer be returned to the bead seat portion 26 of the wheel 1, so that the tire 2 can be securely fitted into the wheel 1. work It can be performed. And since the surface pressure which the tire 2 receives is low, damage to the tire 2 at the time of pressing can be prevented.
Furthermore, since the rolling rod-like bodies 7 revolve while rotating as the tire 2 rotates, the frictional resistance between the tire 2 and the rolling rod-like bodies 7 to be pressed becomes extremely small. In addition, it can be inserted very smoothly.

Further, the tire attaching / detaching device includes pressing means 5 for dropping the bead portion 20 into the drop center 21 of the wheel 1 by approaching and pressing the sidewall portion 22 of the tire 2 lying sideways or the vicinity thereof from above. The pressing means 5 is a plurality of freely rolling rod-like rods arranged in parallel in a substantially radial direction T of the tire 2 when viewed in plan so that a plurality of pressing means 5 simultaneously press the sidewall portion 22 of the tire 2 or the vicinity thereof. The body 7 and the rolling rod-shaped body 7 are rotatably held, and when viewed from the radial direction T of the tire 2, the rotational radius 10 of the tire 2 approaches the rotational direction 10 of the tire 2 with a small first curvature radius R ₁ and then a large second curvature radius R. Revolving guide means 3 for guiding the revolving track 4 to be drawn while being pushed by ₂ and separated at a small third radius of curvature R ₃ , so that the side wall portion 22 of the tire 2 or the vicinity thereof is provided. , Multiple rolling rods The body 7... Is formed with a wide pressing range (in the circumferential direction of rotation) and can always be pressed, and the bead portion 20 a once fitted into the drop center 21 of the wheel 1 is the bead seat portion of the wheel 1. As a result, the tire 2 can be securely fitted into the wheel 1 without being returned to 26. And since the surface pressure which the tire 2 receives is low, damage to the tire 2 at the time of pressing can be prevented.
Further, since the rolling rod-like bodies 7 are very close to and away from the tire 2, the working efficiency is improved.
Furthermore, since the rolling rod-like bodies 7 revolve while rotating as the tire 2 rotates, the frictional resistance between the tire 2 and the rolling rod-like bodies 7 to be pressed becomes extremely small. In addition, it can be inserted very smoothly.

Further, since the first radius of curvature R ₁ is set to be larger than the _third radius of curvature R ₃ and the lower side portion 70 of the _first radius of curvature R ₁ protrudes greatly downward, the sidewall portion 22 or the vicinity thereof is formed. Even a hard tire that can be pressed more widely and deeply can be securely fitted into the wheel 1.

  Moreover, since each rolling rod-like body 7 is formed in a columnar shape, each rolling rod-like body 7 can be revolved while reliably rotating as the tire 2 rotates.

Alternatively, each rolling rod 7 is formed in a tapered cylindrical shape that expands outward in the radial direction T of the tire 2, so that each rolling rod 7 is rotated with the rotation of the tire 2. It is possible to revolve while reliably rotating.
Further, since the tire 2 is pressed so that the outer diameter side of the sidewall portion 22 is submerged deeper, the portion on the outer diameter side of the sidewall portion 22 is a very hard tire such as a run-flat tire. However, it can be securely fitted into the wheel 1.

Further, the revolution guide means 3 has shaft protrusions 8, 8 projecting from both end faces 7a, 7a of each rolling rod-like body 7, and a groove bottom surface 30 where the rolling rod-like body 7 contacts while rotating and revolving. And a holding member 34 having endless groove portions 33 and 33 into which the shaft protrusions 8 and 8 are fitted on the opposite groove side surfaces 32 and 32 of the guide concave circumferential groove 31. The rolling rod-like bodies 7 can be revolved while reliably rotating as the tire 2 rotates.
Moreover, the rolling rod-like bodies 7 are securely held so as not to come off in the radial direction.

Alternatively, the revolution guiding means 3 has shaft protrusions 8 and 8 projecting from both end faces 7a and 7a of each rolling rod-like body 7, and the groove bottom surface 30 where the rolling rod-like body 7 contacts while rotating and revolving. Since it has a guide concave circumferential groove 31 and a pair of endless link chain members 11 and 11 that connect the one side shaft projection 8A and the other side shaft projection 8B of each rolling rod-like body 7 so as to be able to rotate, respectively. The rolling rod-like bodies 7 can be revolved while reliably rotating as the tire 2 rotates.
Moreover, the rolling rod-like bodies 7 are securely held so as not to come off in the radial direction.

Alternatively, each rolling rod-like body 7 is formed in a substantially cylindrical shape, and the revolution guide means 3 includes a constricted portion 51 formed in the middle of the axis L ₇ direction of each rolling rod-like body 7 and a rolling rod shape. A holding member 54 having a contact surface 52 with which the body 7 contacts while rotating and revolving, and an outer flange-shaped displacement prevention portion 53 inserted into the constricted portion 51 of each rolling rod-like body 7 projecting from the contact surface 52; The anti-slip member 55 that surrounds the constricted portion 51 of all the rolling rod-like bodies 7, so that the rolling rod-like bodies 7 can be revolved while being reliably rotated with the rotation of the tire 2. .
Moreover, the rolling rod-like bodies 7 are securely held so as not to come off in the radial direction.

Further, when the revolution locus 4 drawn by the rolling rod-like body 7 is viewed from the radial direction T, the tangent line 49 of the portion contacting the sidewall portion 22 or the vicinity thereof has a predetermined inclination angle θ ₁ with respect to the horizontal plane H. Therefore, it is possible to efficiently cope with various rim sets of the tire 2 with respect to the tire 2 having various shapes and hardness.
Therefore, various types of tires 2 can be securely fitted into the wheel 1 without being damaged.

Further, since the tangent line 39 of the portion where the rolling rod-like body 7 abuts on the side wall portion 22 or the vicinity thereof has a predetermined inclination angle θ ₂ with respect to the horizontal plane H when viewed from the rotation direction of the tire 2, various It is possible to efficiently cope with various rim sets of the tire 2 with respect to the tire 2 having various shapes and hardness.
Therefore, various types of tires 2 can be securely fitted into the wheel 1 without being damaged.

Further, the vehicle is provided with a pressing means 5 for approaching and pressing the sidewall portion 22 of the tire 2 lying sideways or the vicinity thereof from above to drop the bead portion 20 into the drop center 21 of the wheel 1. When viewed from the radial direction T of the tire 2, it approaches the rotational direction 10 of the tire 2 with a small first radius of curvature R ₁ and then follows along with pressing with a large second radius of curvature R ₂ and then a small third radius of curvature R _3. The endless belt member 14 that presses the sidewall portion 22 of the tire 2 or the vicinity thereof is provided so as to be separated by the endless belt member 14 (the rotating circumference). (In the direction) With a wide pressing range, it is possible to always press, and the bead portion 20a once fitted into the drop center 21 of the wheel 1 is returned to the bead seat portion 26 of the wheel 1 The tire 2 can be securely fitted into the wheel 1. And since the surface pressure which the tire 2 receives becomes low, it can prevent that the tire 2 is damaged when pressing.
Further, since the endless belt member 14 contacts and separates very smoothly from the tire 2, work efficiency is improved.
Further, since the belt member 14 rotates as the tire 2 rotates, the frictional resistance between the tire 2 and the belt member 14 to be pressed becomes extremely small, and the tire 2 is fitted into the wheel 1 very smoothly. Can do.

It is a side view for composition explanation showing one embodiment of a tire detaching device of the present invention. It is a top view for composition explanation. It is an explanatory side view which shows the attachment state of a lower bead part. It is a principal part expansion partial cross section side view. It is AA arrow sectional drawing of FIG. It is an action explanatory view, (A) is a front view for action explanation, and (B) is an enlarged front view for action explanation. It is a partial cross section side view for action explanation which shows the attachment state of an upper bead part. It is a partial cross section side view which shows other embodiment of the tire attachment / detachment apparatus of this invention. It is a principal part front view. It is a partial cross section side view which shows another embodiment of the tire attachment / detachment apparatus of this invention. It is a top view for description. It is a principal part partial cross section side view which shows another embodiment of the tire attachment / detachment apparatus of this invention. FIG. 13 is a cross-sectional view taken along line B-B in FIG. 12. It is a principal part partial cross section side view which shows another embodiment of the tire attachment / detachment apparatus of this invention. 14A and 14B are cross-sectional views taken along the line CC of FIG. 14, and FIG. 14B is a cross-sectional view taken along the line CC, and FIG. It is a front view for an operation explanation. It is a front view which shows another embodiment of the tire attachment / detachment apparatus of this invention. It is a rear view. It is a figure which shows another embodiment of the tire attachment / detachment apparatus of this invention, Comprising: (a) is a partial cross section side view, (b) is a perspective view. It is a partial cross section side view which shows another embodiment of the tire attachment / detachment apparatus of this invention. FIG. 21 is a sectional view taken along the line DD in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wheel 2 Tire 3 Revolution guide means 4 Revolution locus 5 Press means 7 Rolling rod-like body 7a End surface 8, 8A, 8B Shaft protrusion
10 Direction of rotation
11 Link chain member
14 Belt member
20 Bead section
21 Drop center
22 Side wall
30 Groove bottom
31 Guide groove
32 groove side
33 Endless groove
34 Holding member
39 Tangent
49 Tangent
51 Constriction
52 Contact surface
53 Shift prevention part
54 Holding member
55 Locking member
70 Lower side θ ₁ , θ ₂ inclination angle H Horizontal plane L ₇ axis R ₁ 1st radius of curvature R ₂ 2nd radius of curvature R ₃ 3rd radius of curvature T Radial direction

Claims (10)

A pressing means for dropping the bead portion (20) into the drop center (21) of the wheel (1) by approaching and pressing the sidewall portion (22) of the tire (2) lying sideways or the vicinity thereof from above. In the tire attaching / detaching device having 5),
The pressing means (5) is arranged in a substantially radial direction (T) of the tire (2) as viewed in plan so that a plurality of pressing means (5) simultaneously press the sidewall (22) of the tire (2) or the vicinity thereof. A plurality of rolling rod-like bodies (7) that are arranged in parallel and that hold the rolling rod-like body (7) so as to be rotatable and that are viewed from the radial direction (T) of the tire (2). After approaching the rotational direction (10) of (2) with a small first radius of curvature (R ₁ ) and then pushing along with a large second radius of curvature (R ₂ ), the small third radius of curvature (R ₃ ) is followed. And a revolution guide means (3) for guiding the vehicle so as to draw a revolution trajectory (4) to be separated in step (4) . The first curvature radius (R ₁ ) is set to be larger than the third curvature radius (R ₃ ), and the lower side portion (70) of the _first curvature radius (R ₁ ) protrudes greatly downward. Item 1. A tire attaching / detaching device according to Item 1 . The tire detaching device according to claim 1 or 2, wherein each rolling rod-like body (7) is formed in a cylindrical shape . The tire attaching / detaching device according to claim 1 or 2, wherein each rolling rod-like body (7) is formed in a tapered cylindrical shape having a diameter increasing outward in the radial direction (T) of the tire (2) . The revolution guide means (3) includes shaft protrusions (8) and (8) projecting from both end faces (7a) and (7a) of each rolling rod (7), and the rolling rod (7). Is provided with a guide concave circumferential groove (31) having a groove bottom surface (30) that contacts while rotating and revolving, and the axial protrusion (8) ) (endless groove (33 8) is written fitted) (33) according to claim 1, 2, 3 or 4 tire removing device further comprising a holding member (34) which is formed. The revolution guide means (3) includes shaft protrusions (8) and (8) projecting from both end faces (7a) and (7a) of each rolling rod (7), and the rolling rod (7). Guide groove circumferential groove (31) having a groove bottom surface (30) that contacts while rotating and revolving, and one side axial projection (8A) and other side axial projection (8B) of each rolling rod-like body (7) And a pair of endless link chain members (11) and (11) for connecting each other in a rotatable manner . Each rolling rod-like body (7) is formed in a substantially cylindrical shape,
Furthermore, the revolving guiding means (3), the axis (L ₇₎ medial to form a constricted portion (51), the rolling rod-like body (7) is rotation of each said rolling rod-like body (7) And a contact surface (52) having a contact surface (52) that contacts while revolving, and an outer hook-shaped displacement prevention portion (53) inserted into the constricted portion (51) of each rolling rod-like body (7). a holding member (54) which projects from), tires of all the above constricted portion of the rolling rod-shaped bodies (7) and the anti-removal member (55) surrounding the (51), according to claim 1 or 2, wherein having Detachable device. When the revolution trajectory (4) drawn by the rolling rod-like body (7) is viewed from the radial direction (T), the tangent line (49) of the side wall portion (22) or a portion contacting the vicinity thereof is a horizontal plane. The tire attaching / detaching device according to claim 1, 2, 3, 4, 5, 6 or 7, which has a predetermined inclination angle (θ ₁ ) with respect to (H) . When the rolling rod-like body (7) is in contact with the sidewall (22) or the vicinity thereof, the tangent line (39) when viewed from the rotation direction of the tire (2), relative to the horizontal plane (H). The tire attaching / detaching device according to claim 1, 2 , 3 , 4 , 5 , 6 , 7 or 8 , having a predetermined inclination angle (θ ₂ ) . A pressing means for dropping the bead portion (20) into the drop center (21) of the wheel (1) by approaching and pressing the sidewall portion (22) of the tire (2) lying sideways or the vicinity thereof from above. In the tire attaching / detaching device having 5),
  The pressing means (5) has a first radius of curvature (R) that is small in the rotational direction (10) of the tire (2) when viewed from the radial direction (T) of the tire (2). ₁ ) And the second large radius of curvature (R ₂ ) With a small third radius of curvature (R _Three ), And an endless belt member (14) that presses the sidewall portion (22) of the tire (2) or the vicinity thereof so as to be separated by (1).

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