JP2006208246A - Tire holding system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire holding system adjusting the interval between rim members in axial directions without having to halt the rotation of a pivot, reliably holding the interval between the rim members, and reducing manufacturing costs. <P>SOLUTION: The position of an upper rim member 40 in the axial directions to an engaging hole 30e of an intermediate shaft 30 is changed by the movement of each contact member 70 in the axial directions to an upper rotary shaft 10 with the diameter of a holding mechanism 30c reduced, and by the movement of the intermediate shaft 30 in the axial directions to the upper rotary shaft 10. The interval between the upper rim member 40 and a lower rim member 50 in the axial directions, is thereby easily adjusted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tire holding device provided in a tire testing machine that measures tire uniformity and runout, for example, in a manufacturing process of an automobile tire.

  In general, if the weight balance or thickness of the tire in the circumferential direction of an automobile tire is biased, it will cause a decrease in tire running performance, so the tire quality is inspected by a tire testing machine in the tire manufacturing process. is doing. For example, measurement of uniformity, which is one of the tire qualities, is performed by holding a tire with a tire holding device having a pair of upper and lower rim members, rotating the tire while applying an internal pressure, and applying a measuring instrument to the outer circumferential surface. Make contact.

  In addition, since the width dimension of the inner peripheral portion of the tire varies depending on the type of tire, it is necessary to change the axial interval of each rim member depending on the type of tire. This change is performed by, for example, replacing each rim member itself. If so, it takes a lot of work time and is not efficient.

  Therefore, as a tire holding device used in a tire testing machine, a pair of upper and lower support shafts arranged opposite to each other in the axial direction, and attached to opposite ends of each support shaft, respectively, hold the tire from both sides in the width direction. A pair of possible rim members, a middle shaft provided in the lower support shaft so as to be movable in the axial direction with respect to the support shaft, and a first moving the middle shaft in the axial direction with respect to the lower support shaft A hydraulic cylinder, a first engagement portion provided at the upper end portion of the middle shaft so as to extend toward the upper support shaft, and a lower end portion of the upper support shaft. A second engagement portion engageable in the axial direction and the radial direction of the support shaft; and a second hydraulic cylinder for moving the lower support shaft upward to engage the engagement portions in the axial direction. By moving the middle shaft in the axial direction relative to the lower support shaft by the first hydraulic cylinder. That to adjust the axial spacing of the members easily and rapidly has been known (e.g., see Patent Document 1.).

  However, in the above-mentioned device, it is necessary to use a high output power for the second hydraulic cylinder so that the axial distance between the rim members does not change due to the internal pressure applied to the tire. When the engaging portions are engaged with each other in the axial direction, a large axial impact force is applied to the first engaging portion. When the middle shaft moves in the axial direction with respect to the lower support shaft due to the impact force, the axial distance between the rim members changes. Therefore, the output of the first hydraulic cylinder is used to reliably maintain the distance between the rim members. Need to be larger. That is, the hydraulic cylinder with a large output is an expensive part, and there is a problem that the manufacturing cost of the apparatus is high.

On the other hand, as a device for solving this problem, a pair of upper and lower support shafts arranged to face each other in the axial direction, a rotation mechanism for rotating the upper support shaft, and an opposing end portion of each support shaft are attached. A pair of rim members, a center shaft provided in the upper support shaft so as to be rotatable with respect to the support shaft and having a screw portion on the lower end side, a rotation restricting mechanism capable of restricting rotation of the center shaft, An engagement member that is screwed to the lower end side and rotates with the upper support shaft, and has a first engagement portion provided at the lower end portion, and an upper end portion of the lower support shaft. A second engaging portion that is engageable in the axial direction and the radial direction at the joint portion, and the upper support shaft and the middle shaft are rotated relative to each other to rotate the engaging member axially with respect to the upper support shaft. The distance between the rim members in the axial direction is adjusted by moving the rim members to each other. Those way is known (e.g., see Patent Document 2.).
Japanese Patent No. 3418512 JP 2004-205276 A

  However, in the latter apparatus, the adjustment of the interval between the rim members is performed by first stopping the rotation of the upper support shaft by the rotation mechanism, then restricting the rotation of the middle shaft, and in that state, the upper support shaft is set to the predetermined position by the rotation mechanism. Therefore, there is a problem that uniformity measurement is interrupted at the time of adjustment.

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to adjust the axial interval of each rim member without stopping the rotation of the support shaft, and to each rim member. It is an object of the present invention to provide a tire holding device that can reliably hold the interval and reduce the manufacturing cost.

  In order to achieve the above-mentioned object, the present invention provides a pair of support shafts that are arranged opposite to each other in the axial direction, a pair of rim members that are respectively attached to opposite ends of each support shaft, and each support shaft. A pair of engaging portions that are provided on one end side of the shaft and engageable with each other in the axial direction and the radial direction, and by engaging each engaging portion with each other, each rim member is axially spaced by a predetermined distance In the tire holding device that holds and arranges the tire, the at least one of the support shafts is provided so as to be movable in the axial direction, and the engagement portion is provided on one end side of the support shaft. An intermediate shaft, an abutting member that abuts in the axial direction on the other end portion side of the support shaft in the intermediate shaft, and provided on the other end portion side of the support shaft provided with the intermediate shaft; Engage so as to restrict movement, and move the contact member in the axial direction of the support shaft. And a support mechanism for movably supporting integral with.

  Accordingly, the center shaft moves in the axial direction with respect to the support shaft by moving the contact member in the axial direction with respect to the support shaft, and the shaft of the rim member attached to the support shaft with respect to the engaging portion of the center shaft Since the direction position changes, the interval between the rim members in the axial direction can be easily adjusted. At this time, since the contact member moves in the axial direction by the support mechanism, the middle shaft can be moved in the axial direction with respect to the support shaft even while the support shaft is rotating. In addition, the middle shaft abuts the abutting member in the axial direction of the support shaft, and the abutting member engages the support mechanism so that movement of the support shaft in the axial direction is restricted. However, it does not move easily in the axial direction.

  According to the present invention, since the middle shaft can be moved in the axial direction with respect to the support shaft even while the support shaft is rotating, the interval between the rim members can be adjusted without stopping the rotation of the support shaft. Can do. That is, for example, when measuring a plurality of types of tires having different inner peripheral width dimensions in a uniformity measuring machine, the measurement is not interrupted to adjust the interval between the rim members, and the measurement time is shortened. be able to. Further, since the middle shaft does not easily move in the axial direction with respect to the support shaft, the center shaft is moved in the axial direction with respect to the support shaft, for example, by an impact force when the engaging portions are engaged with each other in the axial direction. There is no movement. That is, the interval between the rim members can be reliably held, and the measurement accuracy can be improved. Furthermore, since it is not necessary to use expensive parts such as a hydraulic cylinder having a large output in order to maintain the distance between the rim members, the manufacturing cost of the apparatus can be reduced.

  1 to 6 show an embodiment of the present invention. FIG. 1 is a partial cross-sectional front view of a tire testing machine, and FIG. 2 is a main cross-sectional view of a tire holding device showing a state before holding the tire. 3 is a cross-sectional view of the main part of the tire holding device showing a state where the tire is held, FIG. 4 is an operation explanatory view of the tire holding device when changing the interval between the rim members, and FIG. 5 is a block diagram of the tire holding device. FIG. 6 is a flowchart showing the operation of the control unit.

  The tire holding device of the present embodiment is provided in a tire testing machine that performs uniformity inspection and run-out measurement of an automobile tire TA, and rotates upward as a support shaft that is rotatably supported by the tire testing machine body 1. The shaft 10 and the lower rotating shaft 20, the middle shaft 30 provided inside the upper rotating shaft, the upper rim member 40 attached to the lower end side of the upper rotating shaft 10, and the upper end side of the lower rotating shaft 20 A lower rim member 50 attached to the middle shaft 30, a buffer mechanism 60 provided so as to be inserted through the middle shaft 30 in the axial direction, two abutting members 70 that abut on the upper end side of the middle shaft 30 in the axial direction, And a support mechanism 71 that supports the contact member 70 movably in the axial direction of the upper rotary shaft 10.

  The tire testing machine main body 1 is held by a base 2 for installing the tire testing machine main body 1 at a predetermined position, a frame 4 supported by the base 2 via a plurality of support columns 3, and rim members 40, 50. Further, a known measuring device 5 for measuring the uniformity and run-out of the tire TA and a conveyor 6 for transporting the tire TA between the upper rim member 40 and the lower rim member 50 are provided.

  The frame 4 is provided with a through hole 4a penetrating in the vertical direction, and the lower opening edge of the through hole 4a is formed to extend downward.

  The measuring device 5 is provided so as to be movable in the horizontal direction and comes into contact with the outer peripheral surface of the tire TA held by the rim members 40 and 50.

  The conveyor 6 includes a plurality of rollers 6a arranged in the front-rear direction at intervals, and a frame 6b that rotatably supports both ends of each roller 6a. A tire TA is provided from the back side to the front side in FIG. It is designed to be transported.

  The upper rotating shaft 10 of the tire holding device is formed in a cylindrical shape, and is vertically inserted into the through hole 4a of the frame 4 and is rotatably supported by the through hole 4a via the bearing 10a. Further, a flange portion 10b formed so as to extend radially outward over the entire circumference is provided on the lower end portion side of the upper rotary shaft 10, and the outer peripheral surface of the upper rotary shaft 10 positioned below the flange portion 10b. Is provided with a rim holding mechanism 10c made of a well-known hydraulic chuck that can be expanded and contracted by hydraulic pressure. The rim holding mechanism 10 c communicates with a plurality of hydraulic cylinders 11 attached to the outside of the lower opening edge of the through-hole 4 a via a communication pipe 11 a and a known rotary seal 12. It is designed to scale.

  A pulley 10d is attached to the outer peripheral surface on the upper end portion side of the upper rotary shaft 10, and the driving force of the motor 7, which is a known servo motor attached to the frame 4, is transmitted to the pulley 10d. .

  The lower rotary shaft 20 is formed in a columnar shape, and is rotatably supported by a housing 2b at a rod end of a known hydraulic cylinder 2a provided in the base 2 via a bearing 20a. Further, a flange portion 20b formed so as to extend radially outward is provided on the upper end portion side of the lower rotary shaft 20, and is provided on the outer peripheral surface of the lower rotary shaft 20 positioned on the upper end portion side of the flange portion 20b. Is provided with a rim holding mechanism 20c comprising a well-known hydraulic chuck that can be expanded and contracted by hydraulic pressure. The rim holding mechanism 20c communicates with a plurality of hydraulic cylinders 21 attached to the housing 2b via a communication pipe 21a and a known rotary seal 22, and the rim holding mechanism 20c is expanded and contracted by each hydraulic cylinder 21. Further, an engaging protrusion 20d as an engaging portion is provided at the center of the upper end surface of the lower rotary shaft 20, and the outer peripheral surface of the engaging protrusion 20d is formed so as to be gradually inclined inward toward the upper side. ing. The engaging protrusion 20d is provided with a communication hole 20e that communicates from the upper end surface to the outer peripheral surface on the lower end side.

  The middle shaft 30 is formed in a cylindrical shape, and passes through the upper rotary shaft 10 in the axial direction. In addition, a flange member 30 a formed so as to extend radially outward over the entire circumference is provided on the outer peripheral surface on the upper end side of the middle shaft 30, and the flange member 30 a penetrates in the axial direction of the upper rotary shaft 30. The through holes 30b are provided at two positions in the circumferential direction, and the lower inner diameter of the through hole 30b is larger than the upper inner diameter.

  The lower end portion of the middle shaft 30 is formed to have a larger outer diameter than the upper end portion side, and a holding mechanism 30c including a well-known hydraulic chuck that can be expanded and contracted by hydraulic pressure is provided on the outer peripheral surface thereof. The holding mechanism 30c communicates with a plurality of hydraulic cylinders 31 attached to the middle shaft 30 slightly below the flange member 30a via the communication pipe 31a, and the holding mechanism 30c expands and contracts by each hydraulic cylinder 31. Yes. That is, when the diameter of the holding mechanism 30c is increased, the outer peripheral surface of the holding mechanism 30c is in radial contact with the inner peripheral surface of the upper rotary shaft 10, and the middle shaft 30 is held in the radial direction with respect to the upper rotary shaft 10. It is like that.

  A communication hole 30 d communicating with the inside of the middle shaft 30 is provided on the outer peripheral surface on the upper end side of the middle shaft 30, and an opening on the inner circumferential surface side of the middle shaft 30 of the communication hole 30 d is formed to extend in the axial direction of the middle shaft 30. Has been. The opening on the outer peripheral surface side of the central shaft 30 of the communication hole 30d communicates with a known rotary seal 32, and a compressor (not shown) capable of supplying compressed air is connected to the rotary seal 32.

  Further, an engagement hole 30e as an engagement portion is provided at the center of the lower end surface of the middle shaft 30, and the inner peripheral surface of the engagement hole 30e is formed so as to be gradually inclined inward toward the upper side. .

  The upper rim member 40 is formed in a cylindrical shape, is disposed on the outer peripheral surface side of the rim holding mechanism 10c of the upper rotary shaft 10, and the inner peripheral surface is held by the rim holding mechanism 10c. The outer peripheral surface on the upper end portion side of the upper rim member 40 is formed so as to extend radially outward over the entire circumference, and is engaged with the inner peripheral portion of the tire TA in the width direction of the tire TA. Further, the outer peripheral surface on the lower end side of the upper rim member 40 is formed to have an outer diameter dimension slightly smaller than the inner peripheral portion of the tire TA, and is engaged with the inner peripheral portion of the tire TA in the radial direction of the tire TA. It has become.

  The lower rim member 50 is formed in a cylindrical shape, is disposed on the outer peripheral surface side of the rim holding mechanism 20c of the lower rotary shaft 20, and the inner peripheral surface is held by the rim holding mechanism 20c. The outer peripheral surface on the lower end side of the lower rim member 50 is formed so as to extend radially outward over the entire circumference, and is engaged with the inner peripheral portion of the tire TA in the width direction of the tire TA. Further, the outer peripheral surface on the upper end side of the lower rim member 50 is formed to have an outer diameter slightly smaller than the inner peripheral surface of the tire TA, and is engaged with the inner peripheral portion of the tire TA in the radial direction of the tire TA. It has become.

  The buffer mechanism 60 includes a contact member 61 provided in the middle shaft 30 so as to extend in the axial direction, and a known oil damper 62 as a buffer member attached to the upper end portion of the contact member 61. .

  The abutting member 61 is formed in a cylindrical shape, is provided so as to be movable in the axial direction with respect to the middle shaft 30, and the lower end portion projects into the engagement hole 30e. A communication hole 61a is formed in the contact member 61 so as to extend in the vertical direction. The lower end portion of the communication hole 61a communicates with the lower end surface of the contact member 61, and the upper end portion of the communication hole 61a is the contact member 61a. 61 communicates with the outer peripheral surface on the upper end side, and communicates with the communication hole 30 d of the central shaft 30.

  The oil damper 62 is urged by a spring (not shown) so that the rod protrudes by a predetermined length. When the rod is moved by an orifice (not shown) provided inside and an oil (not shown) filled therein, the oil damper 62 is moved. Resistance is generated. The oil damper 62 is fixed to the upper end surface of the middle shaft 30. That is, the contact member 61 is supported by the oil damper 62 so that the lower end of the contact member 61 protrudes into the engagement hole 30e. When an upward force is applied to the contact member 61, the resistance of the oil damper 62 by the spring and oil The abutting member 61 moves upward relative to the middle shaft 30 against the force.

  Each contact member 70 is formed in a columnar shape, and a threaded portion 70 a is formed on the outer peripheral surface of each contact member 70, and the lower end surface of each contact member 70 is pivoted on the upper surface of the flange member 30 a of the center shaft 30. Abutting in the direction. In addition, bolts 70 b are inserted into the through holes 30 b of the flange member 30 a from below, and the bolts 70 b are screwed into the lower ends of the contact members 30. That is, each contact member 70 always contacts the upper surface of the flange member 30 a in the axial direction, and each contact member 70 moves in the axial direction of the upper rotary shaft 10 together with the middle shaft 30.

  The support mechanism 71 includes a frame 72 provided on the outer peripheral surface of the upper end portion of the upper rotary shaft 10 so as not to move in the axial direction with respect to the upper rotary shaft 10, and a motor including a known servo motor fixed to the frame 72. 73.

  The frame 72 has a pair of lower frames 72a formed to extend in the radial direction on the outer peripheral surface on the upper end portion side of the upper rotary shaft 10 and a pair formed to extend upward from both ends of the lower frame 72a. A side frame 72b, an upper frame 72c formed so as to connect the upper ends of the side frames 72b, and a pulley 72d as two screwing members rotatably supported by a bearing (not shown) on the upper frame 72c. The driving force of the motor 73 is transmitted to each pulley 72d. Each contact member 70 is screwed to each pulley 72d so as to be movable in the axial direction of the upper rotary shaft 10, and the pulley 72d rotates to move the contact member 70 in the axial direction of the upper rotary shaft 10. It is like that. Further, the upper end side of the middle shaft 30 is disposed inside each of the frames 72a, 72b, 72c, and the rotary seal 72 and a compressor (not shown) are connected to a through hole 72e provided in the center of the upper frame 72c (not shown). The connecting member is inserted.

  Further, as shown in FIG. 5, the hydraulic cylinder 2a, the holding mechanism 30c, and the motor 73 are connected to a control unit 80 made of a well-known microcomputer, and the control unit 80 is connected to a gauge 81 and an input device 82. The part 83 is connected. The gauge 81 is also connected to the calculation unit 83.

  The gauge 81 is a well-known device that detects the amount of movement of the measurement terminal 81a, is attached to the outer peripheral surface of the upper end portion of the upper rotary shaft 10, and can detect the axial position of the middle shaft 30 with respect to the upper rotary shaft 10. .

  The input device 82 includes a well-known keyboard capable of inputting a tire product number by an operator.

  The calculation unit 83 stores size data in the tire width direction corresponding to each tire product number. When the tire product number is input to the input device 82, the size data in the tire width direction corresponding to the product number and the upper rotating shaft 10 are stored. Compared with the position in the axial direction of the middle shaft 30 with respect to, size data in the tire width direction of the input tire product number is transmitted to the control unit 80 when these do not correspond.

  When measuring the uniformity of the tire TA in the tire testing machine having the tire holding device configured as described above, first, the lower rim member 50 is disposed below the conveyor 6 by the hydraulic cylinder 2a. 6, the tire TA after vulcanization molding is arranged substantially coaxially with the rim members 40, 50. In this state, the lower rotary shaft 20 is moved upward by the hydraulic cylinder 2a, the inner peripheral portion of the tire TA is supported by the lower rim member 50, and the engagement hole 30e of the middle shaft 30 and the lower rotary shaft 20 are engaged. The mating protrusion 20d is engaged in the axial direction and the radial direction. Thus, the rim members 40 and 50 are coaxially arranged, and the inner peripheral portion of the tire TA is held by the rim members 40 and 50.

  At this time, since the contact member 61 protrudes into the engagement hole 30e, the contact member is placed on the upper end surface of the engagement protrusion 20d before the engagement hole 30e and the engagement protrusion 20d are engaged in the axial direction. The lower end surface of 61 abuts in the axial direction. When the lower rotary shaft 20 is moved upward in this state, the oil damper 62 imparts resistance against movement to the lower rotary shaft 20. For this reason, the force to move the lower rotary shaft 20 upward is attenuated, and the impact force when the engagement hole 30e and the engagement protrusion 20d engage in the axial direction is reduced. Further, when the lower rotary shaft 20 is moved downward, the contact between the lower rotary shaft 20 and the contact member 61 is released, and the contact member 61 protrudes into the engagement hole 30e again.

  Further, the middle shaft 30 provided with the engagement hole 30e is in contact with each contact member 70 in the axial direction, and the threaded portion 70a of each contact member 70 is provided with each pulley 72d of the frame 72 provided on the upper rotary shaft 10. Therefore, the middle shaft 30 is not easily moved in the axial direction with respect to the upper rotary shaft 10.

  Next, an internal pressure is applied to the tire TA by supplying compressed air from the compressor (not shown) to the tire TA through the rotary seal 32 and the communication holes 30d, 61a, and 20e, and the rotary shafts 10 and 20 are moved by the motor 7. The uniformity of the tire TA is measured by rotating and bringing the measuring device 5 into contact with the outer peripheral surface of the tire TA.

  At this time, the engagement hole 30e provided in the intermediate shaft 30 and the engagement protrusion 20d provided in the lower rotation shaft 20 are engaged in the axial direction and the radial direction, whereby the intermediate shaft 30 and the lower rotation shaft 20 are The movement is surely restricted so that they do not move in the radial direction. Furthermore, since the middle shaft 30 is held in the radial direction with respect to the upper rotary shaft 10 by the holding mechanism 30c, the movement is reliably restricted so that the upper rotary shaft 10 and the lower rotary shaft 20 do not move in the radial direction. The

  Further, the inner pressure applied to the tire TA applies a large force in the direction away from each other to the rim members 40, 50, but the lower rim member 50 abuts against the flange portion 20b of the lower rotary shaft 20 in the axial direction. At the same time, since the lower rotary shaft 20 is supported in the axial direction by the hydraulic cylinder 2a, the lower rim member 50 does not move in the axial direction. On the other hand, the upper rim member 40 is in axial contact with the flange portion 10b of the upper rotary shaft 10, and the upper rotary shaft 10 is supported by the frame 4 via the bearing 10a. Never move. That is, the axial distance between the upper rim member 40 and the lower rim member 50 does not change due to the internal pressure applied to the tire TA.

  Here, for example, a flow chart showing the operation of the control unit 80 in the case of adjusting the distance between the upper rim member 40 and the lower rim member 50 in order to measure the uniformity of the tire TA having a large inner peripheral width. This will be described with reference to FIG.

  First, when the operator inputs the tire part number to be measured next to the input device 82, the size data in the tire width direction corresponding to the input tire part number and the detection result of the gauge 81 are compared in the calculation unit 83, If they are different, the size data in the tire width direction is transmitted from the calculation unit 83 to the control unit 80.

  When the control unit 80 receives the size data (S1), the lower rim member 50 is moved downward by the hydraulic cylinder 2a (S2). Next, by reducing the diameter of the holding mechanism 30c, the radial holding of the middle shaft 30 with respect to the upper rotating shaft 10 is released (S3), and the size is set so that the middle shaft 30 moves downward with respect to the upper rotating shaft 10. Each pulley 72d is rotated by a predetermined angle by the motor 73 while detecting the amount of movement by the gauge 81 based on the data, and each contact member 70 is moved downward with respect to the upper rotating shaft 10 (S4). Subsequently, the central shaft 30 is held in the radial direction on the upper rotary shaft 10 by expanding the diameter of the holding mechanism 30c (S5).

  As a result, the axial position of the upper rim member 40 moves upward with respect to the engagement hole 30e of the middle shaft 30, and the axial distance between the upper rim member 40 and the lower rim member 50 increases. Also in this state, the middle shaft 30 is in axial contact with the respective contact members 70, and the threaded portions 70 a of the respective contact members 70 are axially applied to the pulleys 72 d of the frame 72 provided on the upper rotary shaft 10. Therefore, the middle shaft 30 does not easily move in the axial direction with respect to the upper rotary shaft 10.

  Here, the movement of the middle shaft 30 with respect to the upper rotary shaft 10 is performed by the rotation of each pulley 72d by the motor 73, and the motor 7 is not used. Therefore, even when the upper rotary shaft 10 is rotated by the motor 7, The middle shaft 30 can be moved in the axial direction with respect to the upper rotary shaft 10.

  As described above, according to the present embodiment, each of the contact members 70 is moved in the axial direction with respect to the upper rotating shaft 10 in a state where the diameter of the holding mechanism 30c is reduced, so that the middle shaft 30 is moved with respect to the upper rotating shaft 10. Is moved in the axial direction, and the axial position of the upper rim member 40 with respect to the engagement hole 30e of the middle shaft 30 is changed. Therefore, the axial distance between the upper rim member 40 and the lower rim member 50 can be easily adjusted. can do. At this time, since the motor 7 is not used to move the middle shaft 30 in the axial direction with respect to the upper rotating shaft 10, the middle shaft 30 is rotated upward even when the upper rotating shaft 10 is rotated by the motor 7. It can move in the axial direction with respect to the shaft 10. That is, the axial interval between the rim members 40 and 50 can be adjusted without stopping the rotation of the upper rotary shaft 10, and for example, a plurality of types of tires having different inner peripheral width dimensions in a uniformity measuring machine. When measuring TA sequentially, the measurement is not interrupted to adjust the distance between the rim members 40, 50, and the measurement time can be shortened.

  Further, the middle shaft 30 contacts each contact member 70 in the axial direction of the upper rotary shaft 10, and the screw portion 70 a of each contact member 70 rotates upward on each pulley 72 d of the frame 72 provided on the upper rotary shaft 10. Since the shaft 10 is engaged so as to be restricted from moving in the axial direction, and the middle shaft 30 does not easily move in the axial direction with respect to the upper rotary shaft 10, for example, the engagement hole 30e and the engagement protrusion The middle shaft 30 does not move in the axial direction with respect to the upper rotary shaft 10 due to the impact force generated when 20d comes into contact with the axial direction. That is, the axial interval between the rim members 40 and 50 can be reliably held, and the measurement accuracy can be improved. Further, since it is not necessary to use expensive parts such as a hydraulic cylinder with a large output in order to maintain the axial distance between the rim members 40 and 50, the manufacturing cost of the apparatus can be reduced.

  Further, a support mechanism 71 is provided on the upper end side of the upper rotary shaft 10, and a frame 72 in which each contact member 70 is movably screwed in the axial direction of the upper rotary shaft 10 and each pulley 72 d are set at a predetermined angle. Since each abutting member 70 is configured by a motor 73 that can move in the axial direction by rotating only the abutting member 70, each abutting member 70 can be moved in the axial direction of the upper rotary shaft 10 with a simple configuration. The middle shaft 30 can be held so as not to move easily in the axial direction with respect to the upper rotary shaft 10. Further, since the amount of movement of the middle shaft 30 in the axial direction can be adjusted by the angle at which each pulley 72d is rotated, the interval between the rim members 40, 50 in the axial direction can be set to an arbitrary interval.

  Further, when the tire part number is input to the input device 72 by the worker and the size data in the tire width direction is transmitted from the calculation unit 73 to the control unit 70, the control unit 70 rotates the motor 73 by a predetermined angle. Since the axial distance between the rim members 40 and 50 is adjusted, the measurement operation can be performed very efficiently.

  Further, when the uniformity is measured while holding the tire TA by the rim members 40 and 50, the engagement hole 30e of the middle shaft 30 and the engagement protrusion 20d of the lower rotary shaft 20 are in the axial direction and the radial direction. By engaging, the middle shaft 30 and the lower rotary shaft 20 are reliably restricted in movement so as not to move in the radial direction, and the holding shaft 30 holds the middle shaft 30 in the radial direction with respect to the upper rotary shaft 10. In addition, since the rim members 40 and 50 are held in the radial direction by the rim holding mechanisms 10c and 20c on the rotary shafts 10 and 20, the rim members 40 and 50 are displaced from each other in the radial direction. So that it can be securely held on the same axis. That is, the tire TA can always be held at an appropriate position, and uniformity can be measured accurately.

  Furthermore, before the engagement hole 30e and the engagement protrusion 20d are engaged in the axial direction, the lower end surface of the contact member 61 contacts the upper end surface of the engagement protrusion 20d in the axial direction, and the lower rotation shaft 20 Since the engagement hole 30e and the engagement protrusion 20d are engaged in the axial direction in a state in which a resistance force to the upward movement is applied, the engagement hole 30e and the engagement protrusion 20d are engaged in the axial direction. The impact force when mating is reduced. Thereby, it is possible to prevent a large axial force from being applied to the component parts such as the bearings 10a and 20a supporting the upper rotary shaft 10 and the lower rotary shaft 20, and to extend the life of the component parts. . Further, the vibration and noise of the device when the engagement hole 30e and the engagement protrusion 20d are engaged can be reduced.

  Further, the buffer mechanism 60 is provided in the middle shaft 30 so as to extend in the axial direction, and the lower end portion is formed so as to protrude into the engagement hole 30e, so that the contact member is movable in the axial direction with respect to the middle shaft 30. 61 and an oil damper 62 that applies resistance to the movement of the contact member 61 that moves upward with respect to the middle shaft 30, and the engagement hole 30 e and the engagement protrusion 20 d engage in the axial direction. Since the abutting member 61 abuts the engaging protrusion 20d in the axial direction before and imparts resistance to the movement to the lower rotating shaft 20 that moves upward, the engaging member 30 is engaged with the engaging hole 30e with a simple structure. The impact force generated when the mating protrusion 20d is engaged in the axial direction can be reliably reduced. Furthermore, since the structure can be easily added to existing equipment not provided with the buffer mechanism 60, it is not necessary to make a significant design change of the apparatus, and the manufacturing cost or modification cost of the apparatus can be reduced.

  In this embodiment, the holding mechanism 30c is provided on the outer peripheral surface of the middle shaft 30, but a holding mechanism including a well-known hydraulic chuck that can be expanded and contracted by hydraulic pressure is provided on the inner peripheral surface of the upper rotary shaft 10, It is also possible to hold the middle shaft 30 in the radial direction on the upper rotary shaft 10 by reducing the diameter of the holding mechanism and bringing it into contact with the outer peripheral surface of the middle shaft 30 in the radial direction.

  In the present embodiment, the abutting members 70 are moved in the axial direction by rotating the pulleys 72d. However, the pulleys 72d are fixed to the frame 72 and the abutting members 70d are rotated. It is also possible to move each contact member 70 in the axial direction by rotating the member 70.

  In the present embodiment, the axial distance between the rim members 40 and 50 is adjusted by moving the engagement hole 30e of the middle shaft 30 in the axial direction with respect to the upper rotary shaft 10. However, the same configuration as that on the upper rim member 40 side is provided on the lower rim member 50 side, and the engagement protrusion 20d is moved in the axial direction with respect to the lower rotation shaft 20, whereby each rim member 40, It is also possible to adjust 50 intervals in the axial direction. It is also possible to move the engagement hole 30e and the engagement protrusion 20d in the axial direction with respect to the rotary shafts 10 and 20, respectively.

  Further, in the present embodiment, the oil damper 62 is provided in order to give a resistance force to the lower rotary shaft 20, but a known coil spring or air cylinder can be used instead of the oil damper 62. It is.

  In the present embodiment, two contact members 70 are provided, but one contact member 70 may be provided, and three or more contact members 70 may be provided.

  Further, in this embodiment, the abutting member 70 is provided with the screw portion 70a, and the abutting member 70 is screwed into the pulley 72d of the frame 72. A plurality of recesses are provided at intervals in the axial direction of the contact member 70, and an engagement mechanism is provided on the frame 72 having a protrusion that is detachably engaged with the recess of the contact member 70 in the axial direction. The contact member 70 can move in the axial direction with respect to the frame 72 and can also be configured to engage with the frame 72 in the axial direction. In addition, as long as the contact member 70 is movable in the axial direction with respect to the upper rotary shaft 10 and engages with the upper rotary shaft 10 in the axial direction, the same effects as the present embodiment can be obtained. .

1 is a partial sectional front view of a tire testing machine showing an embodiment of the present invention. Main part sectional drawing of the tire holding device which shows the state before holding a tire Cross-sectional view of the main part of the tire holding device showing the state of holding the tire Operation explanatory diagram of the tire holding device when changing the interval of each rim member Block diagram of tire holding device Flow chart showing operation of control unit

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tire testing machine main body, 2 ... Base, 3 ... Column, 4 ... Frame, 5 ... Measuring device, 6 ... Conveyor, 7 ... Motor, 10 ... Upper rotating shaft, 10a ... Bearing, 10b ... Flange part, 10c ... Rim Holding mechanism, 10d ... pulley, 11 ... hydraulic cylinder, 12 ... rotary seal, 20 ... lower rotary shaft, 20a ... bearing, 20b ... flange, 20c ... rim holding mechanism, 20d ... engagement protrusion, 20e ... communication hole, DESCRIPTION OF SYMBOLS 21 ... Hydraulic cylinder, 22 ... Rotary seal, 30 ... Medium shaft, 30a ... Flange member, 30b ... Through-hole, 30c ... Holding mechanism, 30d ... Communication hole, 30e ... Engagement hole, 31 ... Hydraulic cylinder, 32 ... Rotary seal, 40 ... Upper rim member, 50 ... Lower rim member, 60 ... Buffer mechanism, 61 ... Abutting member, 62 ... Oil damper, 70 ... Abutting member, 70a ... Screw part, 1 ... supporting mechanism, 72 ... frame, 72a ... lower frame, 72b ... side frame, 72c ... upper frame, 72d ... pulley, 73 ... motor, 80 ... controller, 81 ... gauge, TA ... tires.

Claims (7)

A pair of support shafts arranged opposite to each other in the axial direction, a pair of rim members attached to the opposite end portions of each support shaft, and one end portion side of each support shaft, respectively, A tire having a pair of engaging portions engageable in the axial direction and the radial direction, and holding the tire by disposing the respective rim members at predetermined intervals in the axial direction by engaging the engaging portions with each other. In the holding device,
A middle shaft that is provided so as to be movable in at least one of the support shafts in the axial direction, and that has the engagement portion on one end side of the support shaft;
An abutting member that abuts in the axial direction on the other end side of the support shaft in the middle shaft;
Provided on the other end side of the support shaft provided with the intermediate shaft, engages the contact member so as to restrict the movement of the support shaft in the axial direction, and moves the contact member in the axial direction of the support shaft. A tire holding device comprising: a support mechanism that supports the movable body integrally. The support mechanism is provided on the other end side of the support shaft provided with the middle shaft, and a contact member is screwed so as to be movable in the axial direction of the support shaft, and the contact member and the screw member. The tire holding device according to claim 1, wherein the tire holding device is configured by a rotation mechanism that is relatively rotatable by a predetermined angle. A control unit is provided that controls the rotation mechanism so that the axial position of the central shaft relative to the support shaft becomes a position corresponding to the size data based on size data in the width direction of the tire held by each rim member. The tire holding device according to claim 2. A holding mechanism is provided on the outer peripheral surface of the middle shaft so as to be freely expandable and contractable, and is held in the radial direction against the inner peripheral surface of the support shaft by expanding the diameter to hold the intermediate shaft in the radial direction with respect to the support shaft. The tire holding device according to claim 1, 2 or 3. A holding mechanism that is provided on the inner peripheral surface of the support shaft provided with the intermediate shaft so as to be freely expandable and contractable, and that radially contacts the outer peripheral surface of the intermediate shaft by reducing the diameter to hold the intermediate shaft in the radial direction with respect to the support shaft. The tire holding device according to claim 1, wherein the tire holding device is provided. Provided on either one of the support shafts, each engaging portion abuts the other support shaft in the axial direction before engaging each other in the axial direction. The tire holding device according to claim 1, 2, 3, 4, or 5, further comprising a buffer mechanism that provides resistance to movement toward the support shaft. The buffer mechanism is provided so as to extend in the axial direction in the middle shaft, and an abutting member that is formed so that one end portion projects toward one end portion of the support shaft and is movable in the axial direction with respect to the middle shaft; The tire holding device according to claim 6, further comprising: a buffer member that imparts resistance to the movement of the contact member that moves toward the other end side of the support shaft with respect to the middle shaft.

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