JP4213675B2 - Tire holding device - Google Patents

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, applying an internal pressure to the tire and rotating it, and applying a measuring machine to the outer circumferential surface. Make contact.

As described above, the tire holding device used in the tire testing machine includes a pair of upper and lower support shafts arranged to face each other in the axial direction, a moving mechanism capable of moving the lower support shaft in the vertical direction, and each support shaft. A pair of rim members respectively attached to opposite ends of the shaft, a first engagement portion provided on the opposite end of the lower support shaft so as to extend toward the upper support shaft, and an upper support The opposite end of the shaft is provided with a first engagement portion and a second engagement portion engageable in the axial direction and the radial direction. A tire is disposed between the rim members, and the lower side is moved by a moving mechanism. Is known in which the rim members are arranged at predetermined intervals in the axial direction to hold the tire by moving the support shaft upward and engaging the engaging portions with each other. (For example, refer to Patent Document 1).
JP-A-7-190898

  By the way, when an internal pressure is applied to the tire when measuring uniformity, a large force is applied to each rim member in a direction away from each other. When the lower support shaft moves downward due to this force, the rim member moves between the engaging portions. A gap is generated, and the radial positions of the rim members attached to the respective support shafts are shifted from each other, so that accurate measurement cannot be performed. For this reason, as a moving mechanism for moving the lower support shaft in the vertical direction, for example, a hydraulic cylinder having a large output is used so that the lower support shaft does not move downward due to the internal pressure applied to the tire. .

  However, when a hydraulic cylinder having a large output is used, the impact force when the engaging portions are engaged with each other in the axial direction also increases, and the life of components such as bearings supporting the support shafts is shortened. There was a point.

  In addition, there is a problem that large vibration and noise are generated from the apparatus due to the impact force when the engaging portions engage with each other.

  The present invention has been made in view of the above problems, and an object of the present invention is to alleviate an impact force when a pair of engaging portions respectively provided on each spindle are brought into contact with each other in the axial direction. An object of the present invention is to provide a tire holding device that can handle the above.

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 which are respectively provided on one end side of the shaft and engageable with each other in the axial direction and the radial direction, and at least one of the supporting shafts is moved to the other supporting shaft side. In the tire holding device for holding the tire by disposing each rim member at a predetermined interval in the axial direction by engaging each engaging portion with each other, one of the support shafts among the support shafts Before each engaging portion is engaged with each other in the axial direction, and a buffer that abuts the other supporting shaft in the axial direction and applies resistance to movement to the other supporting shaft to the other supporting shaft. a mechanism, the buffering mechanism, when provided so as to extend axially into the shaft DOO And an abutting member which is formed so that one end projects toward one end of the support shaft and is movable in the axial direction with respect to the support shaft, and moves toward the other end of the support shaft with respect to the support shaft. The contact member is composed of a buffer member that provides resistance to the movement of the contact member.

Thereby, before each engaging part mutually engages with each other in the axial direction, the buffer mechanism abuts in the axial direction on the other spindle side, and a force in a direction away from the one spindle is applied to the other spindle. Since the engaging portions engage with each other in the state, the impact force when the engaging portions engage with each other in the axial direction is alleviated. In addition, the buffer mechanism is provided so as to extend in the axial direction in the support shaft, and is formed so that one end portion protrudes to the one end portion side of the support shaft and is movable in the axial direction with respect to the support shaft. Since the member and the shock-absorbing member that imparts resistance against the movement to the abutting member that moves to the other end side of the support shaft with respect to the support shaft, the engaging portions are axially connected to each other with a simple structure. The structure can relieve the impact force when engaging, and can be easily added to existing devices that are not equipped with a shock-absorbing mechanism. The manufacturing cost or remodeling cost can be reduced.

Further, the present invention provides a pair of support shafts that are arranged to face each other in the axial direction, a pair of rim members that are respectively attached to one end side of each support shaft that faces each other, and one end side of each support shaft And a pair of engaging portions that can be engaged with each other in the axial direction and the radial direction, and at least one of the supporting shafts is moved to the other supporting shaft side to move each engaging portion. In the tire holding device that holds the tire by disposing each rim member at a predetermined interval in the axial direction by being engaged with each other, provided on one of the support shafts, First shock-absorbing mechanisms that abut against the other spindle side in the axial direction before the parts are axially engaged with each other, and provide the other spindle with resistance to movement toward the one spindle side, One of the support shafts is provided on the other support shaft side, and before each engaging portion engages with each other in the axial direction, Side abuts axially, and a second buffering mechanism which confers resistance to the movement of the one shaft to the other shaft side, the respective buffering mechanism, respectively, in the axial direction within the support shaft An abutting member provided to extend and having one end projecting toward one end of the support shaft and movable in the axial direction with respect to the support shaft, and the other end of the support shaft with respect to the support shaft It is comprised from the buffer member which provides the resistance with respect to the movement to the contact member which moves to the part side.

Thereby, before each engaging part engages with each other in the axial direction, each buffer mechanism abuts each supporting shaft in the axial direction, and each engaging shaft is applied with a force in a direction away from each other. Since the portions engage with each other, the impact force when the engaging portions engage with each other in the axial direction is alleviated. In addition, the buffer mechanism is provided so as to extend in the axial direction in the support shaft, and is formed so that one end portion protrudes to the one end portion side of the support shaft and is movable in the axial direction with respect to the support shaft. Since the member and the shock-absorbing member that imparts resistance against the movement to the abutting member that moves to the other end side of the support shaft with respect to the support shaft, the engaging portions are axially connected to each other with a simple structure. The structure can relieve the impact force when engaging, and can be easily added to existing devices that are not equipped with a shock-absorbing mechanism. The manufacturing cost or remodeling cost can be reduced.

  According to the present invention, since the impact force when the engaging portions engage with each other in the axial direction is alleviated, for example, a large force is applied to a component such as a bearing that rotatably supports each support shaft. This makes it possible to extend the life of the component parts. Moreover, the vibration and noise of the device when the engaging portions engage with each other can be reduced.

  1 to 11 show a first embodiment of the present invention. FIG. 1 is a partially sectional front view of a tire testing machine, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is a cross-sectional view of the main part of the tire holding device showing the state before holding the tire, FIG. 5 is a cross-sectional view of the main part of the tire holding device showing the state holding the tire, 6 is a perspective view of a main part of the tire holding device, FIG. 7 is a front view and a main part plan view of the main part of the tire holding device, and FIGS. 8 and 9 are tire holdings when changing the interval in the axial direction of each rim member. FIG. 10 is a block diagram of the tire holding device, and FIG. 11 is a flowchart showing the operation of the control unit. FIGS. 12 to 20 show a modification of the present embodiment. FIG. 12 is a cross-sectional view of the main part of the tire holding device showing a modification of the buffer mechanism. FIG. 13 shows another modification of the buffer mechanism. FIG. 14 and FIG. 15 are principal part plan views and principal part front views of a tire holding device showing modifications of the upper rim member and the upper rotating shaft, and FIGS. 16 and 17 are upper rim members. And the principal part top view and principal part front view of the tire holding | maintenance apparatus which show the other modification of an upper side rotating shaft, FIG.18 and FIG.19 is the principal of the tire holding | maintenance apparatus which shows the modification of a lower rim member and a lower side rotating shaft. FIG. 20 is a partial perspective view of a tire holding device showing a modification of the upper rim member.

  The tire holding device of the present embodiment is provided in a tire testing machine that performs uniformity measurement and run-out measurement of a tire TA for automobiles, and rotates upward as a support shaft that is rotatably supported by the tire testing machine body 1. Shaft 10, lower rotary shaft 20, upper rim member 30 attached to the lower end side of upper rotary shaft 10, lower rim member 40 attached to the upper end side of lower rotary shaft 20, and upper rotation A buffer mechanism 50 provided so as to be inserted through the shaft 10 in the axial direction and a moving mechanism 60 capable of moving the upper rim member 30 in the vertical direction are provided.

  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 30 and 40. 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 30 and the lower rim member 40 are provided.

  The frame 4 is provided with a through hole 4a penetrating in the vertical direction, and an opening edge on the lower side 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 30 and 40.

  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 to extend radially outward 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 hydraulically A known hydraulic chuck 10c that can be expanded and contracted is provided. The hydraulic chuck 10 c communicates with a plurality of hydraulic cylinders 11 attached to the upper end portion side of the upper rotary shaft 10 via a communication pipe 11 a, and the hydraulic chuck 10 c is expanded and contracted by each hydraulic cylinder 11.

  A communication hole 10d communicating with the inner side of the upper rotation shaft 10 is provided on the outer peripheral surface on the upper end portion side of the upper rotation shaft 10, and an opening on the inner peripheral surface side of the upper rotation shaft 10 of the communication hole 10d is an upper rotation shaft 10. It is formed to extend in the axial direction. Further, the opening on the outer peripheral surface side of the upper rotation shaft 10 of the communication hole 10d communicates with a known rotary seal 12, and a compressor (not shown) capable of supplying compressed air is connected to the rotary seal 12. Further, a pulley 10e is attached to the outer peripheral surface of the central portion of the upper rotary shaft 10 in the axial direction, and the driving force of the motor 7 as a rotary mechanism comprising a known servo motor attached to the frame 4 is transmitted. ing. Further, an engagement hole 10f as an engagement portion is provided at the center of the lower end surface of the upper rotary shaft 10, and the inner peripheral surface of the engagement hole 10f is formed so as to be gradually inclined inward toward the upper side. ing.

  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 known hydraulic chuck 20c that can be expanded and contracted by hydraulic pressure. The hydraulic chuck 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 hydraulic chuck 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 upper rim member 30 is formed in a cylindrical shape, is disposed on the outer peripheral surface side of the hydraulic chuck 10c of the upper rotary shaft 10, and the inner peripheral surface is held by the hydraulic chuck 10c. The outer peripheral surface on the upper end side of the upper rim member 30 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 is provided with a flange portion 30a formed so as to extend radially outward over the entire circumference. On the other hand, the outer peripheral surface on the lower end side of the upper rim member 30 is formed to have an outer diameter 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.

  A plurality of first protrusions 30b and second protrusions 30c are provided on the upper end surface of the upper rim member 30 at intervals in the circumferential direction, and the first protrusions 30b and the second protrusions 30c are arranged in the circumferential direction. Are alternately arranged. Each protrusion 30b, 30c is formed in a cylindrical shape having the same outer diameter so as to extend in the axial direction of the upper rim member 30, and the second protrusion 30c is formed longer in the axial direction than the first protrusion 30b. Yes. On the other hand, the flange portion 10b of the upper rotary shaft 10 is provided with a plurality of insertion holes 10g through which the protrusions 30b and 30c can be inserted, and the upper rim member 30 is inserted when the protrusions 30b and 30c are inserted into the insertion holes 10g. The upper end surface of this is in contact with the lower end surface of the flange portion 10b in the axial direction.

  Further, a notch portion (not shown) is provided on the outer peripheral surface on the upper end portion side of the upper rim member 30, and the notch portion can be detected by a well-known proximity sensor (not shown).

  The lower rim member 40 is formed in a cylindrical shape, is disposed on the outer peripheral surface side of the hydraulic chuck 20c of the lower rotary shaft 20, and the inner peripheral surface is held by the hydraulic chuck 20c. The outer peripheral surface on the lower end side of the lower 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. In addition, the outer peripheral surface on the upper end side of the lower rim member 40 is formed to have an outer diameter that is 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 50 includes a contact member 51 provided in the upper rotary shaft 10 so as to extend in the axial direction, and a known oil damper 52 as a buffer member attached to the upper end portion of the contact member 51. ing.

  The contact member 51 is formed in a columnar shape, is provided so as to be movable in the axial direction with respect to the upper rotary shaft 10, and has a lower end portion protruding into the engagement hole 10 f. A communication hole 51a is formed in the contact member 51 so as to extend in the vertical direction. The lower end portion of the communication hole 51a communicates with the lower end surface of the contact member 51, and the upper end portion of the communication hole 51a is 51 of the contact member. Is communicated with the outer peripheral surface on the upper end side of the upper rotation shaft 10 and with the communication hole 10 d of the upper rotating shaft 10.

  The oil damper 52 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) and oil (not shown) filled therein, the rod is moved. Resistance is generated. The oil damper 52 is fixed to the upper end surface of the upper rotary shaft 10. That is, the contact member 51 is supported by the oil damper 52 so that the lower end of the contact member 51 protrudes into the engagement hole 10f. When an upward force is applied to the contact member 51, the resistance of the oil damper 52 by the spring and oil The abutting member 51 moves upward relative to the upper rotary shaft 10 against the force.

  The moving mechanism 60 moves a pair of engaging members 61 that can be engaged with the flange portion 30a of the upper rim member 30 in the vertical direction, a cylinder 62 that supports each of the engaging members 61, and the cylinder 62 in the vertical direction. And a cylinder moving mechanism 63.

  Each engaging member 61 is formed along the flange portion 30a, and the flange portion 30aa is provided with a concave portion 61a that can be engaged in the vertical direction. One end of each engagement member 61 is supported by the cylinder 62 so as to be rotatable in the radial direction of the upper rim member 30, and each engagement member 61 is rotated inward in the radial direction of the upper rim member 30. When the engagement member 61 and the upper rim member 30 are engaged and each engagement member 61 is rotated outward in the radial direction of the upper rim member 30, the engagement between each engagement member 61 and the upper rim member 30 is released. It has come to be.

  The cylinder 62 is a well-known air cylinder, and moves each engagement member 61 in the radial direction of the upper rim member 30.

  The cylinder moving mechanism 63 includes a pair of rails 63a that support the cylinder 62 so as to be movable in the vertical direction, and a ball screw 63b that is screwed into a part of the cylinder 62 and is rotated by a servo motor (not shown), and the upper end portion is a frame. 4 is fixed. That is, by rotating the ball screw 63b, the cylinder 62 and the engaging members 61 are moved in the vertical direction.

  As shown in FIG. 10, the hydraulic cylinder 2 a, the motor 7, the hydraulic chuck 10 c, and the moving mechanism 60 are connected to a control unit 70 composed of a known microcomputer, and the control unit 70 has an arithmetic unit 72 having an input device 71. Is connected.

  The input device 71 is a well-known keyboard capable of inputting a tire product number by an operator.

  The calculation unit 72 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 71, the size data in the tire width direction corresponding to the product number is already set. The distances between the upper rim member 30 and the lower rim member 40 are compared, and if they are different, the size data in the tire width direction of the input tire product number is transmitted to the control unit 70.

  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 40 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 30 and 40. 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 40, and the engagement hole 10f of the upper rotary shaft 10 and the lower rotary shaft 20 are supported. The engaging protrusion 20d is engaged in the axial direction and the radial direction. Accordingly, the rim members 30 and 40 are coaxially arranged, and the inner peripheral portion of the tire TA is held by the rim members 30 and 40.

  At this time, since the contact member 51 protrudes into the engagement hole 10f, the contact member is placed on the upper end surface of the engagement protrusion 20 before the engagement hole 10f and the engagement protrusion 20d are engaged in the axial direction. The lower end surface of 51 abuts in the axial direction. When the lower rotary shaft 20 is moved upward in this state, the oil damper 52 imparts a resistance force against the movement to the lower rotary shaft 20. For this reason, the force that moves the lower rotary shaft 20 upward is attenuated, and the impact force when the engagement hole 10f 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 51 is released, and the contact member 51 protrudes again into the engagement hole 10f.

  Next, an internal pressure is applied to the tire TA by supplying compressed air into the tire TA through a rotary seal 12 and communication holes 10d, 51a, and 20e from a compressor (not shown), and the rotating shafts 10 and 20 are rotated by the motor 7. In addition, the uniformity of the tire TA is measured by bringing the measuring device 5 into contact with the outer peripheral surface of the tire TA. At this time, a large force in the axial direction is applied to the rim members 30 and 40 by the internal pressure applied to the tire TA, but the lower rim member 40 is applied to the flange portion 20b of the lower rotating shaft 20 in the axial direction. In addition, since the lower rotary shaft 20 is supported in the axial direction by the hydraulic cylinder 2a, the lower rim member 40 does not move in the axial direction. On the other hand, the upper rim member 30 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 interval between the upper rim member 30 and the lower rim member 40 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 70 in the case of adjusting the distance between the upper rim member 30 and the lower rim member 40 in order to measure the uniformity of the tire TA having a small inner peripheral width. This will be described with reference to FIG.

  In the state shown in FIG. 7, each protrusion 30b, 30c of the upper rim member 30 is inserted into each insertion hole 10g of the flange portion 10b, and the upper end surface of the upper rim member 30 and the lower end surface of the flange portion 10b are in the axial direction. Abut. In this state, when the tire part number to be measured next is input to the input unit 71, the size data in the tire width direction corresponding to the input tire part number, the upper rim member 30 and the lower rim member 40 already set are set. Are compared in the calculation unit 72, and if they are different, the size data in the tire width direction is transmitted to the control unit 70.

  When the control unit 70 receives the size data (S1), the lower rim member 40 is moved downward by the hydraulic cylinder 2a at the rotational position where the notch not shown of the upper rim member is detected by the proximity sensor not shown (S2). ). Next, the engaging members 61 and the cylinders 62 are moved downward, the engaging members 61 are moved inward in the radial direction of the upper rim member 30 by the cylinders 62, and the engaging members 61 are moved to the upper rim member 30. By rotating inward in the radial direction, each engaging member 61 and the upper rim member 30 are engaged in the vertical direction (S3). Next, as shown in FIG. 8, the holding of the upper rim member 30 is released by reducing the diameter of the hydraulic chuck 10c (S4), and the protrusions 30b and 30c and the insertion holes 10g are connected to the upper rim member 30. The upper rim member 30 is moved downward together with each engaging member 61 to a position where it is not engaged in the circumferential direction (S5).

  Subsequently, based on the size data, for example, the upper rotary shaft 30 is moved by the motor 7 so that the circumferential positions of the insertion holes 10g that have been inserted through the first protrusions 30b and the second protrusions 30c coincide with each other. After being rotated by a predetermined angle (S6), the upper rim member 30 is moved upward together with the engaging protrusions 61 (S7). Thereby, each 2nd protrusion 30c penetrates each insertion hole 10g, and each 1st protrusion 30b contact | abuts to the lower end surface of the flange part 10b to an axial direction. In this state, the diameter of the hydraulic cylinder 2a is expanded to hold the upper rim member 30 (S8). Further, each engaging member 61 is rotated outward in the radial direction of the upper rim member 30, and each engaging member 61 is moved outward in the radial direction of the upper rim member 30 by the cylinder 62. 62 is moved upward (S9).

  Thereby, since the upper rim member 30 moves downward with respect to the upper rotating shaft 10, the space | interval of the upper rim member 30 and the lower rim member 40 becomes small. Even in this state, since the upper rim member 30 and the flange portion 10b are in contact with each other in the axial direction, the distance between the upper rim member 30 and the lower rim member 40 is changed by the internal pressure applied to the tire TA. There is no.

  Further, when the distance between the upper rim member 30 and the lower rim member 40 is further reduced, the protrusions 30b and 30c of the upper rim member 30 are not inserted into the insertion holes 10g in the same manner as described above. At the same time, each second protrusion 30c is brought into contact with the lower end surface of the flange portion 10b in the axial direction.

  Thus, according to the tire holding device of the present embodiment, before the lower rotation shaft 20 is moved upward by the hydraulic cylinder 2a to engage the engagement hole 10f and the engagement protrusion 20d in the axial direction, The lower end surface of the contact member 51 protruding into the engagement hole 10f and the upper end surface of the engagement protrusion 20d are in contact with each other in the axial direction, and the lower rotary shaft 20 that moves upward by the oil damper 52 is resistant to the movement. Therefore, the impact force when the engaging hole 10f and the engaging protrusion 20d are engaged in the axial direction can be reduced, and for example, the upper rotating shaft 10 and the lower rotating shaft 20 are supported. Therefore, it is possible to prevent a large force from being applied to the component parts such as the bearings 10a and 20a, and to extend the life of the component parts. Further, the vibration and noise of the device when the engagement hole 10f is engaged with the engagement protrusion 20d can be reduced.

  Further, the buffer mechanism 50 is provided so as to extend in the vertical direction in the upper rotary shaft 10, and the lower end portion is formed so as to protrude into the engagement hole 10 f, and is movable in the axial direction with respect to the upper rotary shaft 10. A contact member 51 and an oil damper 52 that imparts resistance against the movement to the contact member 51 that moves upward with respect to the upper rotary shaft 10, and an engagement hole 10f and an engagement projection 20d are provided. Since the abutting member 51 abuts the engaging protrusion 20d in the axial direction before engaging in the axial direction, and the lower rotating shaft 20 that moves upward is given resistance to the movement, a simple structure is provided. Thus, the impact force when the engagement hole 10f and the engagement protrusion 20d are engaged in the axial direction can be reliably reduced. Further, since the structure is simple and can be easily added to an existing apparatus not provided with the buffer mechanism 50, 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. it can.

  In addition, a plurality of protrusions 30 b and 30 c extending in the axial direction are provided on the upper end surface of the upper rim member 30, and a plurality of insertion holes through which the protrusions 30 b and 30 c can be inserted into the flange portion 10 b of the upper rotary shaft 10. The gap between the upper rim member 30 and the lower rim member 40 is adjusted by changing the contact position of the upper rim member 30 and the flange portion 10b of the upper rotary shaft 10 in the circumferential direction. Therefore, even when measuring tires TA having different sizes in the width direction, it is not necessary to replace each rim member 30, 40, and the tire TA can be measured efficiently.

  Further, the upper rim member 30 is formed with three abutting portions including an upper end surface thereof, each first projecting portion 30b and each second projecting portion 30c, and each abutting portion is increased in the axial direction of the upper rim member 30. The distance between the upper rim member 30 and the lower rim member 40 is changed by changing the abutting portion that abuts the lower end surface of the flange portion 10b in the axial direction to another abutting portion. Can be adjusted. That is, the axial distance between the upper rim member 30 and the lower rim member 40 can be reliably adjusted with a simple structure.

  Further, the upper rim member 30 and the flange portion 10b of the upper rotary shaft 10 are brought into contact with each other in the circumferential direction by the motor 7 that rotates the upper rotary shaft 10 and the moving mechanism 60 that can move the upper rim member 30 downward. Therefore, the distance between the upper rim member 30 and the lower rim member 40 can be adjusted regardless of the manual operation, and the measurement work of the tire TA can be performed efficiently. Here, since the motor 7 that rotates the upper rotating shaft 10 applies rotational force to the rim members 30 and 40 during uniformity measurement, the distance between the upper rim member 30 and the lower rim member 40 is adjusted. It is not necessary to provide a dedicated drive source for the apparatus, and the apparatus can be simplified and the manufacturing cost can be reduced.

  Further, since the upper rotating shaft 10 is rotated by the motor 7 after the upper rim member 30 is moved downward by the moving mechanism 60, each protrusion 30b of the upper rim member 30 is inserted into each insertion hole 10g of the flange portion 10b. , 30c are inserted, and in this state, the upper rim member 30 and the upper rotary shaft 10 cannot relatively rotate until the respective protrusions 30b, 30c are once engaged with the respective insertion holes 10g. The upper rim member 30 and the upper rotary shaft 10 can be rotated relative to each other.

  When the control unit 70 receives the size data in the tire width direction transmitted from the calculation unit 72, the upper rim member 30 is moved downward by the moving mechanism 60 and the upper rotating shaft 10 is moved at a predetermined angle by the motor 7. Since the control mechanism 70 controls the moving mechanism 60 and the motor 7 so as to rotate only the rotation, it is extremely advantageous in automating the measurement of the tire TA.

  In the present embodiment, the buffer mechanism 50 is provided on the upper rotary shaft 10. However, as shown in FIG. 12, the buffer mechanism 53 can also be provided on the lower rotary shaft 20. That is, the buffer mechanism 53 is provided in the inner hole 20f formed in the lower rotary shaft 20 so as to extend in the vertical direction, and one end portion is formed so as to protrude from the upper end surface of the engagement protrusion 20d. The engaging member 10 is formed of an abutting member 54 that is movable in the axial direction with respect to the side rotating shaft 20, and an oil damper (not shown) that supports a lower end portion of the abutting member 54. When the contact hole 51f and the engagement protrusion 20d are engaged in the axial direction by bringing the contact member 51 and the contact member 54 into contact with each other in the axial direction before the contact with the contact 20d in the axial direction. Can reduce the impact force. It is also possible to provide only the buffer mechanism 53 without providing the buffer mechanism 50.

  In the present embodiment, the lower end of the contact member 51 of the buffer mechanism 50 is projected into the engagement hole 10f. However, as shown in FIG. A shock absorbing mechanism 56 comprising a contact member 57 having a lower end projecting from a portion other than the engagement hole 10f and an oil damper 58 as a buffer member supporting the upper end of the contact member 57 is provided on the upper rotating shaft. It is also possible to provide it at a plurality of locations on the lower end surface side of 10 at intervals in the circumferential direction.

  Further, in the present embodiment, the upper rim member 30 is provided with two types of axial length projections of the first projection 30b and the second projection 30c, but the axial length of the projection is shown. Can be one type, or three or more types.

  A plurality of first protrusions 30b and a plurality of second protrusions 30c are provided on the upper end surface of the upper rim member 30, and a plurality of protrusions 30b, 30c can be inserted into the flange portion 10b of the upper rotating shaft 10. Although the insertion hole 10g is provided and the distance between the upper rim member 30 and the lower rim member 40 is adjusted, the upper end surface of the upper rim member 30 and the upper rotary shaft 10 are shown in FIG. It is also possible to adjust the distance between the upper rim member 30 and the lower rim member 40 by providing cylindrical protrusions 30d, 30e, 10h, and 10i on the lower end surfaces of the upper rim member 40 and the lower rim member 40, respectively.

  That is, a plurality of first protrusions 30d and a plurality of second protrusions 30e are provided on the upper end surface of the upper rim member 30 at intervals in the circumferential direction, and each of the first protrusions 30d and each of the second protrusions 30e is provided. Are alternately arranged in the circumferential direction. Also, each second protrusion 30e is formed longer in the axial direction than each first protrusion 30d. On the other hand, a plurality of first protrusions 10h and a plurality of second protrusions 10i are provided on the lower end surface of the flange portion 10b at intervals in the circumferential direction, and the first protrusions 10h and the second protrusions 30e are provided. The second protrusion 10i and the first protrusion 30d are formed so as to contact in the axial direction when contacting in the axial direction.

  In the above configuration, for example, as shown in FIG. 15, the upper rim member 30 and the upper rotary shaft 10 are shifted in the circumferential direction, whereby the first protrusion 10h and the first protrusion 30d are axially moved. The distance between the upper rim member 30 and the lower rim member 40 can be increased.

  In addition, as shown in FIG. 16, the upper rim member 30 and the flange portion 10 b of the upper rotary shaft 10 have a predetermined shape with respect to the axial direction of the upper rotary shaft 10, not the columnar protrusions 30 d, 30 e, 10 h, 10 i. It is also possible to provide the protrusions 30f and 10j having inclined surfaces forming an angle α at a plurality of locations with a circumferential interval.

  In this case, for example, as shown in FIG. 15, by changing the positions of the upper rim member 30 and the upper rotary shaft 10 in the circumferential direction, the contact position in the axial direction between each protrusion 30f and each protrusion 10j can be changed. Instead, the distance between the upper rim member 30 and the lower rim member 40 can be adjusted.

  In the present embodiment, the distance between the upper rim member 30 and the lower rim member 40 is adjusted by moving the upper rim member 30 in the axial direction with respect to the upper rotary shaft 10. However, the distance between the lower rim member 41 and the upper rim member 30 can be adjusted by moving the lower rim member 41 in the axial direction with respect to the lower rotary shaft 20.

  Specifically, as shown in FIG. 18, the lower rim member 41 is formed in the same shape as the upper rim member 30, and is attached to the lower rotary shaft 20 by turning upside down. That is, the lower rim member 41 is provided with a flange portion 41a, a first protrusion 41b, and a second protrusion 41c. Also, the flange portion 20b of the lower rotary shaft 20 is provided with insertion holes 20g through which the respective protrusions 41b and 41c can be inserted, and the lower rim is engaged with the flange portion 41a in the vertical direction in the same manner as the moving mechanism 60. A moving mechanism (not shown) that can move the member 41 in the vertical direction and a servo motor (not shown) that rotates the lower rotary shaft 20 are provided.

  Accordingly, as shown in FIG. 19, the upper rim member 30 and the lower rim member 30 and the lower rim member 30 and the lower rim member 30 and the lower rim member 30 and the flange portions 10b and 20b of the rotary shafts 10 and 20 are changed in contact with each other in the circumferential direction. The distance from the rim member 41 can be adjusted.

  In addition, the axial length of each first protrusion 30b and the axial length of each first protrusion 41b are formed to be equal, and the axial length of each second protrusion 30c and each second protrusion 41b. The rim members 30 and 41 can be moved by equal distances in the opposite directions in the axial direction. Thereby, since the center part in the width direction of the tire TA held by the rim members 30 and 41 is always arranged at the same height position, the uniformity measurement value by the measuring device 5 is determined according to the vertical movement amount of the tire TA. Therefore, the device can be simplified and the manufacturing cost can be reduced.

  In the present embodiment, the protrusions 30b and 30c are integrally provided on the upper end surface of the upper rim member 30, but a plurality of protrusions are formed on the upper end surface of the upper rim member 31 as shown in FIG. The contact ring 32 provided with the portions 32a and 32b can be detachably attached by a plurality of bolts 32c.

  Specifically, the upper rim member 31 is formed in a cylindrical shape, and the outer peripheral surface on the upper end side is formed so as to extend outward in the radial direction over the entire circumference. Further, the upper rim member 31 is provided with a flange portion 31a formed on the outer peripheral surface of the upper rim member 31 so as to extend radially outward over the entire circumference. A plurality of screw holes 31b are provided at intervals. On the other hand, the contact ring 32 is provided with a plurality of first protrusions 32a and a plurality of second protrusions 32b spaced apart from each other in the circumferential direction, and a plurality of mounting holes 32d spaced apart from each other in the circumferential direction. .

  Accordingly, by preparing other abutment rings 32 having different axial lengths of the protrusions 32a and 32b, it is possible to cope with the measurement of a plurality of types of tires TA, and the size in the width direction of the tires. Accordingly, it is not necessary to manufacture a plurality of rim members 31, and the manufacturing cost of the apparatus can be reduced.

  In the present embodiment, the oil damper 52 is provided in order to provide the contact member 51 with resistance. However, a well-known coil spring, air cylinder, or the like can be used instead of the oil damper 52. It is.

1 is a partial sectional front view of a tire testing machine showing an embodiment of the present invention. AA line sectional view in FIG. Partial cross-sectional view in the direction of arrow B in FIG. 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 Perspective view of main part of tire holding device Front view and main part plan view of main part of tire holding device Operation explanatory view of the tire holding device when changing the axial interval of each rim member Operation explanatory view of the tire holding device when changing the axial interval of each rim member Block diagram of tire holding device Flow chart showing operation of control unit Sectional drawing of the principal part of the tire holding device which shows the modification of the buffer mechanism in this embodiment Sectional drawing of the principal part of the tire holding | maintenance apparatus which shows the other modification of the buffer mechanism in this embodiment. The principal part top view and principal part front view of a tire holding device which show the modification of the upper side rim member and upper side rotating shaft in this embodiment The principal part top view and principal part front view of a tire holding device which show the modification of the upper side rim member and upper side rotating shaft in this embodiment The principal part top view and principal part front view of the tire holding | maintenance apparatus which show the other modification of the upper side rim member and upper side rotating shaft in this embodiment. The principal part top view and principal part front view of the tire holding | maintenance apparatus which show the other modification of the upper side rim member and upper side rotating shaft in this embodiment. The principal part top view and principal part front view of a tire holding device which show the modification of the lower rim member in this embodiment, and a lower side rotating shaft The principal part top view and principal part front view of a tire holding device which show the modification of the lower rim member in this embodiment, and a lower side rotating shaft The principal part perspective view of the tire holding device which shows the modification of the upper side rim member in this embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tire testing machine main body, 2 ... Base, 3 ... Support | pillar, 4 ... Frame, 5 ... Measuring apparatus, 6 ... Conveyor, 7 ... Motor, 10 ... Upper rotating shaft, 10a ... Bearing, 10b ... Flange part, 10c ... Hydraulic pressure Chuck, 10d ... communication hole, 10f ... engagement hole, 10g ... insertion hole, 10h ... first projection, 10i ... second projection, 10j ... projection, 11 ... hydraulic cylinder, 12 ... rotary seal, 20 ... bottom Side rotary shaft, 20a ... bearing, 20b ... flange, 20c ... hydraulic chuck, 20d ... engagement projection, 20f ... communication hole, 20g ... insertion hole, 21 ... hydraulic cylinder, 30 ... upper rim member, 30b ... first projection 30c ... second protrusion, 30d ... first protrusion, 30e ... second protrusion, 30f ... protrusion, 31 ... upper rim member, 32 ... contact ring, 32a ... first protrusion, 32b ... first 2 protrusions, 40 ... lower rim , 41 ... lower rim member, 41 b ... first protrusion, 41 c ... second protrusion, 50 ... buffer mechanism, 51 ... abutting member, 51a ... communication hole, 52 ... oil damper, 53 ... buffer mechanism, 54 ... Contact member 56 ... Shock absorbing mechanism 57 ... Contact member 58 ... Oil damper 60 ... Moving mechanism 61 ... Engaging member 62 ... Cylinder 70 ... Control unit TA ... Tire

Claims (11)

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 pair of engaging portions that can be engaged in the axial direction and the radial direction, and by moving at least one of the supporting shafts to the other supporting shaft side and engaging the engaging portions with each other. In the tire holding device for holding the tire by arranging the rim members at predetermined intervals in the axial direction,
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. Provided with a buffer mechanism that provides resistance to movement to the support shaft,
The abutting member is provided so that the buffer mechanism extends in the axial direction in the support shaft, and is formed so that one end portion protrudes to the one end portion side of the support shaft and is movable in the axial direction with respect to the support shaft. And a cushioning member that imparts resistance against the movement to the contact member that moves to the other end side of the support shaft with respect to the support shaft . 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 pair of engaging portions that can be engaged in the axial direction and the radial direction, and by moving at least one of the supporting shafts to the other supporting shaft side and engaging the engaging portions with each other. In the tire holding device for holding the tire by arranging the rim members at predetermined intervals in the axial direction,
One of the support shafts is provided on one of the support shafts, and is brought into axial contact with the other support shaft before the engaging portions engage with each other in the axial direction. A first buffer mechanism that provides resistance to lateral movement;
Provided on the other spindle side of each of the spindles, before each engaging portion engages with each other in the axial direction, abuts in the axial direction on one of the spindles, and on one spindle on the other spindle side A second shock absorbing mechanism that provides resistance to movement to
Each of the buffer mechanisms is provided in the support shaft so as to extend in the axial direction, and is formed so that one end portion protrudes toward the one end portion side of the support shaft and is movable in the axial direction with respect to the support shaft. A tire holding device comprising: a contact member; and a buffer member that applies a resistance force to the contact member that moves to the other end side of the support shaft with respect to the support shaft . Wherein one of the rim member provided with the axially movable relative to the support shaft of each rim member, the support shaft which is mounted one of the rim member and the rim member, the circumferential direction an arbitrary position of the rim member with each other Each has a contact portion that contacts in the axial direction,
The respective contact portions, the tire holding device according to claim 1 or 2, characterized in that formed so as to contact with a position having different axial direction by varying the contact position in the circumferential direction. Each of the rim members is provided so as to be movable in the axial direction with respect to each of the support shafts, and the one rim member and the support shaft to which the rim member is attached contact each other in the axial direction at any position in the circumferential direction of the rim member. Contact portions are provided respectively, and the other rim member and the support shaft to which the rim member is attached are provided with contact portions that contact each other in an axial direction at an arbitrary position in the circumferential direction of the rim member,
The abutting portion of one rim member and the abutting portion of the support shaft to which the rim member is attached are formed so as to abut at different positions in the axial direction by changing the abutting position in the circumferential direction.
The contact portion of the other rim member and the contact portion of the support shaft to which the rim member is attached are formed to contact each other at different positions in the axial direction by changing the contact position in the circumferential direction. The tire holding device according to any one of claims 1 and 2 . The contact portions on the one rim member side and the contact portions on the other rim member side are formed so that the rim members move by an equal distance in the opposite axial direction. Item 5. The tire holding device according to Item 4 . At least one of the contact portion of the contact portion and the supporting shaft of said rim member, as claimed in claim 3, 4 or 5, characterized by forming a plurality of abutment portions having different heights in the axial direction of the rim member The tire holding device according to any one of the above. And forming the abutment ring mounted detachably an abutment of the rim member to the rim member, characterized in that a plurality of abutment portions with different heights to the contact ring in the axial direction The tire holding device according to any one of claims 3, 4, and 5 . At least one of the contact portion of the contact portion and the supporting shaft of said rim member, as claimed in claim 3, 4 or 5, characterized in that formed by the contact portion formed an inclined surface with respect to the axial direction of the rim member The tire holding device according to any one of the above. 9. A rotating means capable of relatively rotating the rim member and the support shaft so as to change the contact position with each other in the circumferential direction is provided. Any one of claims 3, 4, 5, 6, 7 and 8 tire holding device of crab described. Wherein based on the size data in the width direction of the tire to be held by each limb member, controls the rotation means so that the contact portion of the contact portion and the supporting shaft of the rim member is in contact with the circumferential positions corresponding to the size data The tire holding device according to claim 9, further comprising a control unit that performs the control. 11. The rotating device according to claim 9, wherein the rotating means includes a moving mechanism capable of moving the rim member in the axial direction with respect to the support shaft, and a rotating mechanism capable of rotating the support shaft by an arbitrary angle . The tire holding device according to any one of the above.

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