JP2005289197A - Core assembling device and core assembling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a convenient core assembling device and a convenient core assembling method which reduce the assembly work. <P>SOLUTION: The core assembling device 10 comprises: a tire holding mechanism 20 to hold a pneumatic tire 12; a core holding unit 22 to hold a core 16; and a turning/elevating/lowering mechanism 24 which turnably holds the core holding unit 22 around a horizontal turning shaft 52, and elevates the core holding unit 22 to push the core 16 into a rim-fitting opening 12M of the pneumatic tire 12 from the outer circumferential side of the core. The core is hence assembled in the pneumatic tire by one core assembling device 10 in a completely automatic manner in a short time, which realizes the convenient core assembling device 10 reducing the time for the assembly time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a core assembling apparatus and a core assembling method for assembling a core inside a pneumatic tire.

  Use of a tire rim assembly including a rim, a core assembled to the rim, and a pneumatic tire is useful for run-flat traveling during emergency traveling such as puncture.

  In such a tire rim assembly, a ring-shaped support member (support ring) is provided inside the pneumatic tire as a core, and when the pneumatic tire is crushed due to a decrease in internal pressure, the inner side of the tread portion abuts on the core outer peripheral surface side. In many cases, the structure is supported and supported (see, for example, Patent Documents 1 and 2).

  When assembling such a tire rim assembly, the core is incorporated inside the pneumatic tire by the following two steps.

  That is, as a first step, as shown in FIG. 4 (A), the pneumatic tire 82 and the core 86 are oriented perpendicular to each other, and the core 86 is inserted into the rim mounting opening 82M of the pneumatic tire 82. From the outer peripheral surface side. There are manual and semi-automatic methods for pushing in. In the manual method, for example, an operator manually performs the operation. In the semi-automatic method, for example, the position of the pneumatic tire 82 is fixed, the core 86 is suspended by a string, and the string is pulled up hydraulically.

Next, as a second step, as shown in FIG. 4B, the core 86 is incorporated inside the pneumatic tire 82 by rotating the core 86 about 90 ° around the tire radial direction. In order to perform the rotation of about 90 °, the core 86 is placed in a work place with a pneumatic tire inserted into the opening 82M, and the operator presses it with his / her foot.
JP 2002-59720 A JP-T-2001-519279

  However, there have been the following problems.

  When the first step is performed manually, if the core 86 fails to be pushed into the pneumatic tire 82, the core 86 may be rebounded by the sidewall portion 85, which is not preferable for the operator. Further, in the semi-automatic method, an operation of hanging the core 86 with a string is necessary.

  In the second step, since the operator rotates the core 86 by about 90 ° with his / her foot, when the core 86 is inserted into the pneumatic tire 82 by this 90 ° rotation, The reaction may cause the operator to step off, which is not preferable.

  Furthermore, the outer peripheral surface side of the core 86 is partially in contact with the lubricant that is uniformly applied to the inside of the pneumatic tire 82. As a result, part of the lubricant is peeled off, and the entire pneumatic tire is obtained. There is a risk that the weight balance will deteriorate.

  Further, since the two steps of the first and second steps are performed, it takes time for the assembling work.

  In view of the above facts, an object of the present invention is to provide an easy-to-use core assembling apparatus and a core assembling method that reduce the time for assembling work.

  In the semi-automatic method of the first step, the inventor paid attention to the fact that the core is lifted with a string and pushed into the opening of the pneumatic tire while moving in the tire rotation axis direction. Then, it was studied to rotate the core while performing this pushing, and experiments were repeated to complete the present invention.

  The invention according to claim 1 is a tire-shaped holding means for holding a pneumatic tire, and a ring shape that supports the inner side of the tread portion of the pneumatic tire by contacting the inner side of the pneumatic tire when the pneumatic tire is crushed due to a decrease in internal pressure. A core holding means for holding the core and a rotation shaft around the radial direction of the core held by the core holding means, and the core holding means is rotated about the rotation axis. The core holding means or the tire holding means is moved so that the rotating shaft is perpendicular to the tire rotation axis so that the core is used for mounting the rim of the pneumatic tire. And a pushing / turning means for pushing into the opening.

  In the first aspect of the present invention, the tire holding means normally allows the sidewall portion to be deformed so that the core can be inserted into the opening for mounting the rim of the pneumatic tire from the core outer peripheral surface side. Hold the tire. Further, the ring-shaped core is held by the core holding means.

  The pushing / turning means rotatably holds the core holding means around the turning shaft and moves the core holding means or the tire holding means so that the turning shaft rotates the tire. The core is pushed into the opening for installing the rim of the pneumatic tire in a direction perpendicular to the axis.

  In parallel with this pushing-in operation or in a state where the core central axis is located in the equator plane of the pneumatic tire, the core holding means is rotated around the rotation axis by a predetermined angle. As a result, the core enters the inside of the pneumatic tire, and the sidewall portion returns to the original shape.

  As a result, a single core assembly device can automatically integrate the core into the pneumatic tire in a short time, realizing an easy-to-use core assembly device that reduces assembly time. Can be made.

  The invention according to claim 2 is characterized in that the core holding means has a plurality of abutting portions which are movable back and forth with respect to the center of the core and abut against the core from the radially inner side.

  Thereby, the structure of the core holding means can be simplified. Further, the core can be easily attached and detached by the core holding means.

  The invention described in claim 3 uses the core assembling apparatus according to claim 1 or 2, and rotates the core holding means around the rotation axis by a predetermined angle while pushing the core into the opening. The core is inserted into the pneumatic tire.

  In the third aspect of the invention, the insertion and rotation of the core are performed in parallel, so that the time required for assembling the core into the pneumatic tire can be further shortened.

  According to a fourth aspect of the present invention, the ring-shaped core is supported from the core outer peripheral surface side by supporting the inner side of the tread portion of the pneumatic tire against the outer peripheral surface side when the pneumatic tire is crushed due to a decrease in internal pressure. Pushing the rim mounting opening of the pneumatic tire, and rotating the core a predetermined angle around the axis of the core radial direction orthogonal to the tire rotation axis. It is characterized in that it is performed in a state of being kept constant.

  As the inclination of the pneumatic tire, for example, the pneumatic tire is leveled. Any jig or device may be used to push in and rotate the core.

  According to the invention described in claim 4, when the core is assembled inside the pneumatic tire, the core is difficult to contact the inside of the pneumatic tire. However, it is easy to avoid that a part of the lubricant is peeled off by the core.

  Since the present invention has the above-described configuration, it is possible to realize an easy-to-use core assembling apparatus that reduces the time for assembling work, and the core can be assembled inside the pneumatic tire in a short time.

  Hereinafter, embodiments will be described and embodiments of the present invention will be described. As shown in FIG. 1, the core assembly device 10 according to the present embodiment includes a ring-shaped core 16 that supports the inner side of the tread portion 14 against the outer peripheral surface when the pneumatic tire 12 is crushed due to a decrease in internal pressure. Is a device that incorporates the inside of the pneumatic tire 12.

  The core assembly device 10 is disposed below the pneumatic tire 12 held by the tire holding mechanism 20 and the tire holding mechanism 20 that holds the pneumatic tire 12 so that the sidewall portion 15 can be deformed. A core holding portion 22 that holds the core 16 and a rotation / lifting mechanism 24 that holds the core holding portion 22 so that the core holding portion 22 can be rotated and moved up and down are provided.

  The tire holding mechanism 20 includes a mounting base portion 28 having a substantially square shape in plan view for mounting the pneumatic tire 12 substantially horizontally, and a column portion 30 that extends downward from four corners of the mounting base portion 28 and supports the mounting base portion 28. It is equipped with. In the center of the mounting table portion 28, a disk-shaped mounting table opening 28M having a diameter larger than that of the core 16 is formed so that the core 16 can pass therethrough.

  Further, the tire holding mechanism 20 includes positioning units 32 </ b> A to 32 </ b> C that contact the both sides and the back side of the pneumatic tire 12 that is mounted on the mounting table 28 to position the pneumatic tire 12. 28 on the upper side.

  The positioning portion 32 </ b> A has a U-shaped horizontal contact member 34 </ b> A that contacts the tread portion 14 of the pneumatic tire 12. The positioning units 32B and 32C have the same configuration.

  Further, the tire holding mechanism 20 presses the upper tread shoulder portion and the sidewall portion of the pneumatic tire 12 positioned on the mounting table portion 28 from above, so that the pneumatic tire 12 is placed between the mounting table portion 28 and the pneumatic tire 12. It has the press part 40 to clamp. The pressing unit 40 is configured to press the pneumatic tire 12 at four locations.

  With this configuration, the tire holding mechanism 20 can hold the pneumatic tire 12 at a predetermined position so that the sidewall portion 15 can be deformed.

  The core holding portion 22 includes a clamp air cylinder 42 provided at the center position, and a clamp piston 44 extending from the clamp air cylinder 42 so as to be able to advance and retreat in four directions. The clamping piston 44 has a clamp portion 46 at the tip that has a tip corresponding to the inner peripheral surface of the core 16 and abuts against the core 16 from the inner peripheral surface.

  The clamping air cylinder 42 is held by a later-described rotation holding unit 50 so as to be positioned on the central axis of the mounting table opening 28M.

  The clamping force by the clamping piston 44 is preferably 490 N (50 kgf) or more. Below 490N, when the core 16 is pushed into the rim mounting opening 12M of the pneumatic tire 12, or when the core 16 is rotated around a rotation shaft 52 described later, the core 16 by the core holding portion 22 is used. This is because the holding force may not be sufficient.

  The rotation / lifting mechanism 24 includes a rotation holding unit 50 that rotatably holds the core holding unit 22 around a horizontal rotation shaft 52 that passes through the center of the core holding unit 22, and a rotation holding unit 50. , Two support columns 56 that stand in the vertical direction, a rotation piston 58 that rotates the core holding portion 22 around the rotation shaft 52, and a rotation air that moves the rotation piston 58 forward and backward. A cylinder 60, a support 56 on which the support 56 is mounted and connected to the support 56, and the support 56 is moved up and down, and a rotating air cylinder 60 is mounted on the lifting support 62 so as to be rotatable. Part 64.

  It is preferable that a torque of 294 N · m (30 kgf · m) or more can be applied as the torque for rotating the core holding portion 22. This is because at 294 N · m or less, the force is not sufficient to rotate the core 16 pushed into the rim mounting opening 12 </ b> M of the pneumatic tire 12, and the rotation may stop halfway.

  Further, since the lubricant is uniformly applied to the inside of the pneumatic tire 12, when the core 16 is incorporated inside the pneumatic tire 12, the core outer peripheral surface side contacts the inside of the pneumatic tire 12. In order to prevent the lubricant from being partially peeled off, it is preferable that the positional accuracy of the lifting table 62 and the rotating shaft 52 is within ± 5 mm.

  It is preferable that the lifting table 62 can be moved up and down with a force of 980 N (100 kgf) or more. This is because the core 16 may not be pushed into the opening 12M of the pneumatic tire 12 at 980N or less.

(Function)
Hereinafter, the operation of incorporating the core 16 into the pneumatic tire 12 by the core incorporating device 10 will be described.

  First, the pneumatic tire 12 is clamped with the tire holding mechanism 20 positioned on the mounting table 28.

  Further, the core 16 is transported to the position of the core holding portion 22 so that the clamp air cylinder 42 is positioned inside the core 16, and the clamp piston 44 is extended. As a result, the clamp portion 46 comes into contact with four locations from the inside of the core, and the core 16 is held by the core holding portion 22 with a strong holding force.

  Then, the column 56 is raised by the elevating table 62. As a result, the core 16 passes through the opening 12M and is pushed into the rim mounting opening 12M of the pneumatic tire 12. Note that the side wall portion 15 is deformed by this insertion.

  Further, the core holding portion 22 is rotated by 90 ° by operating the rotation air cylinder 60 to retract the rotation piston 58. As a result, the core 16 is incorporated inside the pneumatic tire 12, and the sidewall portion 15 returns to its original shape.

  As the rotation start timing of the core holding portion 22, starting from the time when the outer peripheral surface side of the core 16 starts to enter the opening 12 </ b> M of the pneumatic tire 12, the raising of the support 56 and the rotation of the core 16 are performed simultaneously. By doing so, the work time required for assembly may be shortened, and when the core central axis 16C of the core 16 held by the core holding part 22 is positioned on the equator plane of the pneumatic tire 12, May be stopped and the core holding part 22 may be rotated.

  As described above, in this embodiment, the core 16 can be automatically assembled in the pneumatic tire 12 in a short time by one core assembling device 10, and the time required for assembling work is conventionally increased. Compared to a significant reduction. Further, when the core 16 is incorporated inside the pneumatic tire 12, the lubricant is uniformly applied to the inside of the pneumatic tire 12 because the core central axis 16 </ b> C and the tire rotation axis 12 </ b> C are incorporated so as to coincide with each other. In addition, the outer peripheral surface side of the core 16 does not come into contact, and therefore a part of the lubricant is not peeled off.

  In this embodiment, the number of clamping pistons 44 is four, but even with three, the core 16 can be sufficiently held with sufficient force. In addition, as shown in FIG. 2, even if the two clamping pistons 65 are used, the core 16 can be held with sufficient force without being deformed by using the clamp portion 66 having a long arc length. Is possible. Further, it may be operated by hydraulic pressure instead of an air cylinder, and any mechanism may be used as long as a predetermined clamping force can be generated.

  Further, in the present embodiment, the rotating piston 58 and the rotating air cylinder 60 are provided to rotate the core holding portion 22, but the present invention is not limited to this, and a predetermined rotational force can be obtained. Any mechanism may be used.

  Moreover, as shown in FIG. 3, you may provide the raising / lowering stand 72 which raises / lowers by an air cylinder system.

<Experimental example>
In this experimental example, a pneumatic tire 12 having an inner diameter of the bead portion of 450 mm and an outer diameter of the core 16 of 560 mm was used, and an experiment for incorporation into the pneumatic tire was performed. A lubricant was applied to the pneumatic tire with a width of 80 mm.

  The bead cream used in the tire rim set was applied around the bead portion of the pneumatic tire 12 and around the core 16.

  After the pneumatic tire 12 is clamped by the tire holding mechanism 20, the core 16 is held by the core holding portion 22 so that the clamp portion 46 is uniformly abutted from the four inner sides, and the center is held by the rotating / lifting mechanism 24. The child 16 was raised. Then, the core 16 was inserted into the opening 12 </ b> M of the pneumatic tire 12, and the core holding portion 22 was rotated by 90 ° to incorporate the core 16 inside the pneumatic tire 12.

  As a result, the core 16 could be incorporated inside the pneumatic tire 12 in a short time without manual intervention. Further, the core 16 did not come into contact with the lubricant applied to the inside of the pneumatic tire 12.

  The embodiments of the present invention have been described with reference to the embodiments. However, the above embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. Needless to say, the scope of rights of the present invention is not limited to the above embodiment.

1A to 1C are a side view, a plan view, and a front view, respectively, of a core assembly device according to an embodiment of the present invention. It is a front view which shows the modification of the core incorporating apparatus which concerns on one Embodiment of this invention. It is a side view which shows the modification of the core incorporating apparatus which concerns on one Embodiment of this invention. 4 (A) and 4 (B) are perspective views for each process showing that the core is incorporated inside the pneumatic tire by a conventional method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Core assembly apparatus 12 Pneumatic tire 14 Tread part 16 Core 20 Tire holding mechanism (tire holding means)
22 Core holding part (core holding means)
24 Rotation / lifting mechanism (push-in / rotation means)
46 Clamping part (contact part)
52 Rotating shaft 66 Clamp part (contact part)

Claims (4)

Tire holding means for holding a pneumatic tire;
Core holding means for holding a ring-shaped core that supports the inner side of the tread portion of the pneumatic tire when it is crushed due to a decrease in internal pressure;
The core holding means has a rotating shaft around the radial direction of the core held by the core holding means and holds the core holding means so as to be rotatable around the rotating shaft, and the core holding means or Pushing / turning means for pushing the core into the rim mounting opening of the pneumatic tire by moving the tire holding means so that the turning shaft is orthogonal to the tire rotation axis;
A core assembly device characterized by comprising:   2. The core assembly according to claim 1, wherein the core holding means has a plurality of abutting portions that are movable back and forth with respect to the center of the core and abut against the core from the radially inner side. apparatus.   The core assembly device according to claim 1 or 2, wherein the core holding means is rotated about a rotation axis by a predetermined angle while the core is pushed into the opening, and the core is moved to the pneumatic tire. A method for assembling the core, characterized in that it is inserted inside the core.   When the pneumatic tire is crushed due to a decrease in internal pressure, the ring-shaped core that supports the inner side of the tread portion of the pneumatic tire by contacting the outer peripheral surface side is supported from the core outer peripheral surface side to the rim mounting opening of the pneumatic tire. And pressing the core around a core radial direction perpendicular to the tire rotation axis while rotating the core by a predetermined angle while maintaining a constant inclination of the pneumatic tire. Characteristic core assembly method.

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