JP2021169290A - Tire testing machine - Google Patents

Abstract

To provide a tire testing machine capable of stably adjusting a space between an upper rim and a lower rim according to the width of a tire for a long period of time.SOLUTION: A lower spindle 21 includes a lower holding flange 210A for holding a lower rim 61, a lock piece 250, and a lock driving part 25. An upper spindle 22 includes an upper holding flange 221 for holding an upper rim 62 and an upper spindle engagement part 224. When an insertion amount of an insertion part 222 into an interior space S is adjusted and the lock piece 250 is turned by the lock driving part 25, a plurality of lock engagement parts 250A of the lock piece 250 are engaged with a plurality of insertion engagement parts 224A of the upper spindle engagement part 224 so that a space between the lower rim 61 and the upper rim 62 is adjusted according to the width of a tire T.SELECTED DRAWING: Figure 5

Description

The present invention relates to a tire testing machine for performing a predetermined test on a tire.

Conventionally, a tire testing machine for measuring tire uniformity and the like has been known. The tire testing machine has a spindle that rotatably supports the tire around the rotation center axis extending in the vertical direction, and is rotatably supported around the rotation center axis parallel to the rotation center axis of the spindle and hits the outer peripheral surface of the tire. It has a rotating drum that can be contacted and a load cell that can measure the load applied to the rotating drum. There is also a device having a load cell on the spindle side.

When the tire mounted on the spindle is filled with air and the rotating drum is pressed against the outer peripheral surface of the tire, the tire is rotated by the spindle and the load cell measures the load fluctuation data of the tire. Tire uniformity is evaluated based on the measured load variation data. The spindle has an upper spindle and a lower spindle. When the tire is mounted on the spindle, an upper rim and a lower rim corresponding to the tire size are mounted on both side surfaces of the tire, and the spindle rotatably supports the tire through these rims.

Since some tires evaluated by a tire testing machine have widths of various dimensions, it is necessary to set a relative distance between the upper rim and the lower rim according to the width of each tire. Patent Document 1 discloses a tire testing machine capable of adjusting the distance between the upper rim and the lower rim. Specifically, the tire testing machine has a cylindrical spindle (corresponding to the lower spindle) that supports the lower rim, a cylindrical lock shaft (corresponding to the upper spindle) that supports the upper rim, and a drive mechanism. Have. A lock shaft is inserted into the spindle of the spindle. On the outer peripheral surface of the tip of the lock shaft, 15 upper and lower lock grooves are arranged. On the other hand, the spindle has a spindle main body and four lock members attached to the spindle main body. The four lock members are arranged at intervals in the circumferential direction so as to face the lock groove, and can be reciprocated along the radial direction. Further, each lock member has six upper and lower lock claws that can be engaged with the lock groove. When the approach amount (lowering amount) of the lock shaft to the spindle is adjusted and the drive mechanism moves the four lock members inward in the radial direction, the six-stage lock claws are engaged with the predetermined lock grooves, respectively, and the lock shaft is moved. Positioned vertically with respect to the spindle. As a result, the relative positions of the upper rim and the lower rim are fixed.

Japanese Patent No. 3904318

The tire testing machine described in Patent Document 1 has a problem that the lock member is easily damaged as the test is repeated, and it becomes difficult to accurately set the relative position of the lock shaft with respect to the spindle. Specifically, after the lock shaft is positioned with respect to the spindle, when the space defined by the upper rim, tire and lower rim is filled with air, the four lock members have a large axial force along the upward direction. Is given. As a result, each lock member is liable to fall so that its radial inner portion moves upward while its radial outer portion moves downward. In this way, when the four lock members as described above collapse each time the tire is filled with air in the tire testing machine, at least one of the two lock members is strongly contacted by a part of the lock member and the spindle body. The part wears and becomes easily damaged. Since such damage causes misalignment in each of the four lock members, it becomes difficult to accurately set the relative position of the lock shaft with respect to the spindle.

The present invention has been made in view of the above problems, and is a tire testing machine capable of stably adjusting the distance between the upper rim and the lower rim according to the width of the tire for a long period of time. The purpose is to provide.

Provided by the present invention is to rotate the tire in a horizontal posture in which the rotation center axis of the tire extends in the vertical direction at a predetermined tire test position around the rotation center axis, and perform a predetermined test on the tire. It is a tire testing machine that performs. The tire testing machine has a lower holding portion capable of holding a lower rim mounted on a lower bead portion which is a bead portion located on the lower side of the tire in a horizontal posture, and the tire. Is mounted on a lower spindle that supports the tire via the lower rim so that the tire can rotate around the center axis of rotation, and an upper bead portion that is a bead portion located on the upper side of the tire in a horizontal posture. An upper spindle that has an upper holding portion capable of holding the upper rim and supports the tire via the upper rim so that the tire can rotate around the rotation center axis, and the upper spindle. And with the lower spindle supporting the tire via the upper rim and the lower rim, the tire internal space, which is the space defined by the upper rim, the tire and the lower rim, can be filled with air. The distance between the possible air supply mechanism and the upper rim held by the upper holding portion and the lower rim held by the lower holding portion becomes a predetermined distance preset according to the width of the tire. As described above, a spindle positioning mechanism for relatively positioning the upper spindle and the lower spindle in the axial direction of the rotation center axis is provided. The central axis of rotation is such that one of the lower spindle and the upper spindle is inserted along the axial direction into the other spindle, which is different from the lower spindle and the one spindle of the upper spindle. The other spindle has an opening facing the insertion portion of the one spindle in the axial direction and an internal space capable of accepting the insertion portion through the opening. It has a cylindrical spindle inner peripheral surface that defines each of the above. The insertion portion is arranged with a cylindrical insertion outer peripheral surface constituting the outer peripheral surface of the insertion portion and a part of the insertion outer peripheral surface that extends in the axial direction and is spaced apart from each other in the rotation direction of the tire. A plurality of insert-engagement portions constituting the plurality of insert-engagement portions, each including a plurality of insertion protrusions extending along the rotation direction and arranged adjacent to each other in the axial direction, and the plurality of insertion-engagement portions. A plurality of insertion recesses that are arranged so as to extend in the axial direction between the insertion engagement portions that are adjacent to each other in the rotation direction and form a part of the insertion outer peripheral surface. It has a plurality of insertion recesses each having a shape recessed inward in the radial direction with respect to the plurality of insertion engagement portions when viewed from the axial direction. The spindle positioning mechanism includes a locking inner peripheral surface which is arranged so as to be continuous with the spindle inner peripheral surface along the axial direction and defines the internal space together with the spindle inner peripheral surface, and the shaft is provided by the other spindle. A ring-shaped lock member mounted on the other spindle so as to be constrained in a direction and rotatable relative to the other spindle around the rotation center axis, and the one inserted into the internal space. A lock member capable of locking the insertion portion of the spindle in the axial direction, and a lock drive portion capable of rotating the lock member relative to the other spindle around the rotation center axis. Has. The lock member is a plurality of lock engaging portions that extend in the axial direction and are arranged at intervals in the rotation direction on the inner peripheral surface for the lock, and extend along the rotation direction. Between a plurality of lock engaging portions including a plurality of locking protrusions arranged adjacent to each other in the axial direction and the lock engaging portions adjacent to each other in the rotational direction among the plurality of lock engaging portions. A plurality of lock recesses, which are respectively arranged on the inner peripheral surface for the lock so as to extend in the axial direction, and each have a shape recessed outward in the radial direction with respect to the plurality of lock engaging portions when viewed from the axial direction. Has. When viewed from the axial direction, the plurality of insertion engaging portions of the one spindle match the plurality of lock recesses of the lock member, and the plurality of insertion recesses of the one spindle are the plurality of insertion recesses of the lock member. In an insertable state in which the plurality of insertion engagement portions are in a state of matching the lock engagement portions of the above, the other spindle is moved to a specific position where the plurality of insertion engagement portions face each of the plurality of lock engagement portions in the rotation direction. The insertion portion of the spindle can be received into the internal space along the axial direction, and the plurality of locking protrusions of the plurality of lock engaging portions of the lock member are adjacent to each other in the axial direction. In the space between the locking protrusions, the plurality of engaging protrusions adjacent to each other in the axial direction of the plurality of insertion engaging portions of the one spindle are each received along the rotation direction, and the plurality of engaging protrusions and the plurality of engaging protrusions are received. By rotating the lock member to the engaging position where they are engaged with each other, the upper holding portion of the upper spindle and the lower holding portion of the lower spindle can be relatively positioned in the axial direction. With respect to the plurality of insertion engaging portions and the plurality of insertion recesses, the dimensions of the plurality of lock engaging portions and the plurality of lock recesses in the radial direction and the circumferential direction around the rotation center axis are set, respectively. The lock drive unit can rotate the lock member around the rotation center axis between the specific position and the engagement position.

According to this configuration, after the insertion part of one spindle is inserted into the internal space of the other spindle, the lock drive part rotates the lock member relative to the other spindle to hold the upper spindle above. The distance between the portion and the lower holding portion of the lower spindle can be fixed. Then, when the air supply mechanism fills the tire internal space with air, the ring-shaped lock member can evenly receive the axial force applied to the upper spindle and the lower spindle by the air over the entire circumferential direction. Therefore, even if the lock member receives the axial force, it does not easily fall with respect to the rotation center axis, and each time the tire is filled with air in the tire testing machine, a part of the lock member and each spindle come into strong contact with each other. Damage to that member is prevented. As a result, the distance between the upper rim and the lower rim can be stably adjusted for a long period of time according to the width of the tire.

In the above configuration, the other spindle has a cylindrical spindle outer peripheral surface that constitutes the outer peripheral surface of the other spindle, and the other spindle communicates with the internal space and accommodates the lock member. A ring-shaped accommodation space and a communication space that communicates the accommodation space and the outer peripheral surface of the spindle in the radial direction are formed, respectively, and the lock drive unit is arranged outside the radial direction of the other spindle. The driving force of the driving source can be transmitted to the lock member through the communication space so as to rotate the lock member around the rotation center axis by the driving force of the driving source and the driving force of the driving source. It is desirable to include a possible transmission mechanism.

According to this configuration, the transmission mechanism can transmit the driving force of the drive source arranged outside the other spindle to the lock member in the other spindle, and rotate the lock member around the rotation center axis. Therefore, it is not necessary to arrange the drive source inside the upper spindle or the lower spindle, and it is suppressed that the size of the upper spindle or the lower spindle becomes large due to the arrangement of the drive source. Further, since the transmission mechanism transmits the driving force along the radial direction through the communication space formed in the other spindle, the driving force is transmitted to the lock member along the axial direction from above or below the spindle. In comparison, the transmission path of the driving force can be shortened.

In the above configuration, the transmission mechanism is arranged concentrically with the lock member on the radial outer side of the communication space and is supported on the outer peripheral surface of the spindle of the other spindle so as to be rotatable around the rotation center axis. A ring-shaped rotary gear having a plurality of first gear teeth formed on the outer peripheral portion of the rotary gear, and the rotary gear inserted into the communication space, and the rotary gear and the lock member. With respect to at least one connecting member that connects the rotating gear and the locking member to each other in the radial direction and the plurality of first gear teeth of the rotating gear so that the rotary gear can rotate integrally around the rotation center axis. It has a rotation transmission unit that transmits the driving force to the rotating gear so that the rotating gear can be rotated around the rotation center axis by the driving force of the driving source. Is desirable.

According to this configuration, the connecting member can rotate the rotary gear and the lock member integrally only by transmitting the driving force of the drive source to the plurality of first gear teeth of the rotary gear. Therefore, it is not necessary to provide gear teeth on the lock member arranged in the accommodation space, and it is possible to prevent the structure of the lock member from becoming complicated. Further, since the rotation transmission unit can be brought into contact with and detached from the plurality of first gear teeth of the rotation gear, when the lock member is rotated to a predetermined position, the rotation transmission unit is retracted from the rotation gear. , It is prevented that the rotation transmission part interferes with the rotation of each spindle.

In the above configuration, the rotation transmission unit includes a plurality of second gear teeth arranged adjacent to each other along one horizontal direction and capable of engaging with the plurality of first gear teeth of the rotating gear. , The rack is centered on the rotating gear so that the engagement and disengagement of the rack, the plurality of first gear teeth and the plurality of second gear teeth can be switched. The rack has a contact / disengagement drive unit that can be brought into contact with each other along a direction orthogonal to the axis, and the drive source is a state in which the first gear and the second gear are engaged with each other. It is desirable that the gear can be reciprocated along the one direction.

According to this configuration, the drive source reciprocates the rack along one direction, so that the lock member can be rotated in the forward and reverse directions about the rotation center axis. Further, the contact / detachment drive unit brings the rack into contact with the rotary gear, so that the transmission of the driving force to the lock member and the interruption of the transmission can be switched. Therefore, the linear power of the drive source arranged outside the spindle can be converted into the rotation of the lock member in the spindle, and the rotation of the lock member can be stably controlled.

In the above configuration, in the insertable state, the distance between the upper rim held by the upper holding portion and the lower rim held by the lower holding portion is set according to the width of the tire. The lock drive unit further comprises an insertion drive unit capable of relatively inserting the insertion unit of the one spindle to the specific position in the internal space of the other spindle so as to be spaced apart. With the insertion portion arranged at the specific position, the plurality of engaging protrusions of the plurality of insertion engaging portions and the plurality of locking protrusions of the plurality of lock engaging portions are engaged with each other. In addition, it is desirable to rotate the lock member relative to the one spindle around the rotation center axis.

According to this configuration, both spindles are rotated by rotating the lock member after the upper spindle and the lower spindle are relatively moved in the axial direction by the driving force of the insertion drive unit and the lock drive unit without the need for the force of an operator. Can be locked, and the distance between the upper rim and the lower rim can be set appropriately according to the width of the tire.

In the above configuration, a rotation detection unit capable of detecting that a specific portion of the one spindle has reached a specific rotation position set in advance around the rotation center axis, and the specific portion at the specific rotation position. When the rotation detection unit detects that the rotation has been reached, the rotation detection unit further includes a rotation prevention unit capable of blocking the rotation of the one spindle, and the insertion drive unit is the rotation prevention unit of the one spindle. In a state where rotation is blocked, the insertion portion of the one spindle can be relatively inserted to the specific position in the internal space of the other spindle, and the lock drive portion can prevent the rotation. The plurality of insertion engaging portions of the plurality of insertion engaging portions in a state in which the rotation of the one spindle is blocked by the portion and the insertion portion of the one spindle is inserted to the specific position in the internal space of the other spindle. It is desirable that the lock member can be rotated around the rotation center axis so that the engaging projections of the above and the plurality of locking projections of the plurality of lock engaging portions engage with each other.

According to this configuration, it is possible to lock both spindles by rotating the lock member after moving the upper spindle and the lower spindle relative to each other in a state where the rotation of one spindle is blocked. , It is possible to prevent one spindle and the locking member from rotating with each other at the time of locking.

In the above configuration, a rotation detecting unit capable of detecting the rotation position of a specific portion of the one spindle around the rotation center axis, a rotation blocking unit capable of blocking the rotation of the one spindle, and the rotation blocking unit. In a state where the rotation of the first spindle is blocked by the portion, the plurality of insertion engaging portions of the one spindle are aligned with the plurality of lock recesses of the other spindle when viewed from the axial direction. The other spindle is moved around the rotation center axis according to the detection result of the rotation detection unit so that the plurality of insertion recesses of one spindle match the plurality of lock engagement portions of the other spindle. It is desirable to further include a rotation drive unit capable of rotating.

According to this configuration, the rotation drive unit is positioned in the rotational direction between the plurality of insertion engagement portions of the one spindle and the plurality of lock engagement portions of the lock member without stopping one spindle at a specific rotation position. The alignment can be easily performed according to the detection result of the rotation detection unit.

In the above configuration, in the insertion drive unit, the rotation of the first spindle is blocked by the rotation blocking portion, the plurality of insertion engaging portions are matched with the plurality of lock recesses, and the plurality of insertion recesses are the said. The insertion portion of the one spindle can be relatively inserted to the specific position in the internal space of the other spindle in a state of matching each of the plurality of lock engagement portions, and the lock drive portion can be inserted. With the plurality of engaging protrusions of the plurality of insertion engaging portions in a state where the rotation of the first spindle is blocked by the rotation blocking portion and the insertion portion is inserted to the specific position in the internal space. It is desirable that the lock member can be rotated around the rotation center axis so that the plurality of locking protrusions of the plurality of lock engaging portions engage with each other.

According to this configuration, it is possible to lock both spindles by rotating the lock member after moving the upper spindle and the lower spindle relative to each other in a state where the rotation of one spindle is blocked. , It is possible to prevent one spindle and the locking member from rotating with each other at the time of locking.

In the above configuration, the plurality of engaging protrusions of the plurality of insertion engaging portions have a spiral shape centered on the rotation center axis so as to incline in one direction in the axial direction as the rotation direction progresses. The plurality of locking projections of the plurality of lock engaging portions have a spiral shape centered on the rotation center axis so as to incline in the one direction as the rotation direction progresses. It is desirable to have a spiral shape that can engage with the plurality of engaging protrusions along the rotation direction.

According to this configuration, not only the relative positions of the insertion engaging portion and the lock engaging portion in the axial direction, but also the lower holding portion and the upper holding portion depending on the relative positions (rotational positions) in the circumferential direction of each other. Since the distance between the upper rim and the lower rim can be adjusted, the distance between the upper rim and the lower rim can be set more finely.

According to the present invention, there is provided a tire testing machine capable of stably adjusting the distance between the upper rim and the lower rim according to the width of the tire for a long period of time.

It is a top view of the tire testing machine which concerns on one Embodiment of this invention. It is a rear view of the tire testing machine which concerns on one Embodiment of this invention. It is a side view of the tire testing machine which concerns on one Embodiment of this invention. It is a perspective view of the state which the lower rim and the upper rim are supported by the lower spindle and the upper spindle of the tire tester which concerns on one Embodiment of this invention, respectively. It is a side sectional view of the state which the lower rim and the upper rim are supported by the lower spindle and the upper spindle of the tire tester which concerns on one Embodiment of this invention, respectively. It is a side view of the state which the upper rim is supported by the upper spindle of the tire tester which concerns on one Embodiment of this invention. It is a bottom view of the guide piece of the upper spindle of the tire tester which concerns on one Embodiment of this invention. It is a perspective view of the lower spindle, the lock piece and the lock drive part of the tire tester which concerns on one Embodiment of this invention. It is a top view of the lock piece of the tire tester which concerns on one Embodiment of this invention. It is sectional drawing of the lock piece of the tire tester which concerns on one Embodiment of this invention. It is a perspective view of the lock piece of the tire tester which concerns on one Embodiment of this invention. It is a perspective view of the upper spindle, the upper rim and the lock piece of the tire tester which concerns on one Embodiment of this invention. It is a perspective view of the lock drive part of the tire tester which concerns on one Embodiment of this invention. It is a perspective view of the lock drive part of the tire tester which concerns on one Embodiment of this invention. It is an upper perspective view of the elevating unit of the tire testing machine which concerns on one Embodiment of this invention. FIG. 5 is an enlarged perspective view of a part of the elevating unit of FIG. 15. It is a lower perspective view of the elevating unit of the tire tester which concerns on one Embodiment of this invention. FIG. 6 is an enlarged perspective view of a part of the elevating unit of FIG. It is a top view of the elevating unit of the tire tester which concerns on one Embodiment of this invention. FIG. 5 is an enlarged plan view of a part of the elevating unit of FIG. 19. It is a block diagram of the tire testing machine which concerns on one Embodiment of this invention. It is a side view which shows the process in which a tire is rotatably supported in the tire testing machine which concerns on one Embodiment of this invention. FIG. 2 is a cross-sectional view corresponding to FIG. 22, showing a process in which a tire is rotatably supported in a tire testing machine according to an embodiment of the present invention. It is sectional drawing which shows the process in which a tire is rotatably supported in the tire testing machine which concerns on one Embodiment of this invention. It is sectional drawing which shows the process of rotating a lock piece in the tire tester which concerns on one Embodiment of this invention. It is sectional drawing which shows the process of rotating a lock piece in the tire tester which concerns on one Embodiment of this invention. It is sectional drawing which shows the process of rotating a lock piece in the tire tester which concerns on one Embodiment of this invention. It is sectional drawing which shows the process in which a tire is rotatably supported in the tire testing machine which concerns on one Embodiment of this invention. It is a side view of the state in which the upper rim is supported by the upper spindle of the tire tester which concerns on the modification embodiment of this invention. It is a top view of the lock piece of the tire tester which concerns on the modification embodiment of this invention. It is a side sectional view of the lock piece of the tire tester which concerns on the modification embodiment of this invention.

Hereinafter, an embodiment of the tire testing machine 1 of the present invention will be described in detail with reference to the drawings. 1, FIG. 2 and FIG. 3 are a plan view, a rear view, and a side view of the tire testing machine 1 according to the present embodiment. In each of the subsequent drawings, the front-rear, up-down, and left-right directions are shown with reference to the tire T conveyed by the tire testing machine 1, and the directions are the usage modes of the tire testing machine according to the present invention. Does not limit.

The tire testing machine 1 includes a main body frame 1S, a spindle 2, a tire transport mechanism 3, a rotating drum 4, an elevating unit 50, a marking unit 60, a drum moving mechanism (not shown), a load cell 4L, and a spindle positioning mechanism. 2M (FIG. 4) and. The tire testing machine 1 uses the tire T in a horizontal posture in which the tire rotation center axis CL (rotation center axis) of the tire T (see FIG. 19) extends in the vertical direction at a predetermined tire test position P. A predetermined test is performed on the tire T by rotating it around the rotation center axis CL.

The main body frame 1S is arranged at a substantially central portion of the tire testing machine 1, and a tire test position P is formed inside the main body frame 1S. Further, the main body frame 1S rotatably supports the spindle 2. The main body frame 1S includes a lower frame 100 (FIG. 3), a base frame 101 (FIG. 2), and an upper frame 102 (FIG. 2).

The spindle 2 rotatably supports the tire T around the reference rotation center axis 2S extending in the vertical direction at the tire test position P. The spindle 2 has a lower spindle 21 (the other spindle, the second spindle) and an upper spindle 22 (one spindle, the first spindle) (FIGS. 2 and 3).

The tire transport mechanism 3 is arranged along the horizontal transport direction D1 so as to pass through the tire test position P in a plan view, and the tire T in the horizontal posture can be carried into the tire test position P. On the other hand, it is possible to carry out the tire T from the tire test position P along the transport direction D1.

The rotary drum 4 is rotatably supported by the base frame 101 of the main body frame 1S. The rotating drum 4 is arranged to face the tire test position P (spindle 2) at a predetermined interval in a direction (left-right direction) substantially orthogonal to the transport direction D1 of the tire T transported by the tire transport mechanism 3. ing. The rotating drum 4 is a cylindrical member that is rotatable around a rotation center axis extending in a direction parallel to the reference rotation center axis 2S of the spindle 2 (vertical direction), and a tire T runs on the outer peripheral surface thereof. A simulated road surface 4A (outer peripheral surface) is formed. When the simulated road surface 4A comes into contact with the outer peripheral surface of the tire T, the rotating drum 4 is driven by the tire T to rotate. A drum moving mechanism (not shown) that pushes the rotating drum 4 in the horizontal direction is provided on the side of the rotating drum 4, and the drum moving mechanism can move the rotating drum 4 closer to and from the tire T. can.

The load cell 4L (load measuring device) is arranged on the vertical extension line of the rotation center axis of the rotating drum 4 (only the upper side is shown in FIG. 1), and measures the load received by the rotating drum 4 from the tire T. The load cell 4L is used to support the rotating drum 4 on the main body frame 1S, and is provided one by one at the upper part and the lower part of the rotating drum 4, and loads in the vertical direction and the axial direction acting on the rotating drum 4. Are measured respectively and calculated based on the sum of the two load cells 4L. That is, in the tire testing machine 1 according to the present embodiment, the rotating drum 4 is brought close to the spindle 2 by using a combination of a ball screw and a motor (not shown), and the tire T is brought into contact with the simulated road surface 4A of the rotating drum 4. It is configured as a tire uniformity machine that evaluates the uniformity of the tire T by measuring the load fluctuation during tire rotation with the road cell 4L.

The tire transport mechanism 3 has a belt conveyor type structure. The tire transport mechanism 3 includes a carry-in conveyor 7, a transport conveyor 8, a carry-out conveyor 9, a carry-in frame 7S, and a carry-out frame 9S. In FIG. 1, the tire T is conveyed from the right side (upstream side) to the left side (downstream side).

The carry-in conveyor 7 conveys the tire T toward the tire test position P. The tire T conveyed by the carry-in conveyor 7 is delivered to the upstream portion of the transfer conveyor 8. The transport conveyor 8 receives the tire T from the carry-in conveyor 7 and carries the tire T to the tire test position P. The conveyor 8 is controlled by the control unit 90 described later to suspend the tire T at the tire test position P. After that, when the tire T is subjected to a predetermined test, the conveyor 8 transports the tire T further downstream. The tire T conveyed by the transfer conveyor 8 is delivered to the carry-out conveyor 9. The unloading conveyor 9 receives the tire T from the transport conveyor 8 and transports the tire T further downstream. In addition, in FIG. 1, the whole of only the carry-in conveyor 7 appears. In each conveyor, a speed reducer and a motor are arranged between the downstream portions of the two belts.

The carry-in conveyor 7, the transfer conveyor 8, and the carry-out conveyor 9 are orbitally driven by a drive unit (not shown) included in the tire transfer mechanism 3. Further, the conveyor 8 can be raised and lowered by an air cylinder (not shown) included in the drive unit. The tire T carried into the tire test position P is delivered to the lower spindle 21 by the lowering of the conveyor 8. FIG. 3 shows a state in which the conveyor 8 has moved to the lowermost lower position. When the transfer conveyor 8 is moved to the uppermost upper position, the transfer conveyor 8 is arranged at the same height as the carry-in conveyor 7 and the carry-out conveyor 9, and the tire T can be conveyed.

The carry-in frame 7S supports the carry-in conveyor 7 so as to be able to orbit, and the carry-out frame 9S supports the carry-out conveyor 9 so as to be orbitable. Further, the carry-out frame 9S supports a marking unit 60 (FIG. 3) that gives a predetermined marking to the tire T according to the test result at the tire test position P.

The elevating unit 50 supports the upper spindle 22 so as to be able to elevate and rotate. The elevating unit 50 can move up and down along the pair of guide frames 102A of the upper frame 102 of FIG. The detailed structure of the elevating unit 50 will be described later.

4 and 5 are perspective views and cross-sectional views of a state in which the lower rim 61 and the upper rim 62 are supported by the lower spindle 21 and the upper spindle 22 of the tire testing machine 1 according to the embodiment of the present invention, respectively. FIG. 6 is a side view of a state in which the upper rim 62 is supported by the upper spindle 22 of the tire testing machine 1 according to the present embodiment. FIG. 7 is a bottom view of the guide piece 223 of the upper spindle 22 of the tire testing machine 1 according to the present embodiment.

The lower spindle 21 is a lower holding flange 210A (lower holding portion) capable of holding a lower rim 61 mounted on a lower bead portion which is a bead portion located on the lower side of the tire T in the horizontal posture. (FIG. 5), the tire T is supported so that the tire T can rotate around the reference rotation center axis 2S via the lower rim 61.

The upper spindle 22 is an upper holding flange 221 (upper holding portion) capable of holding the upper rim 62 mounted on the upper bead portion which is a bead portion located on the upper side of the tire T in the horizontal posture. 4 and 5), the tire T is supported so that the tire T can rotate around the reference rotation center axis 2S via the upper rim 62.

When the tire T is arranged at the tire test position P, the tire rotation center axis CL of the tire T coincides with the reference rotation center axis 2S of the spindle 2. The tire testing machine 1 has a plurality of types of lower rim 61 and upper rim 62 according to the size (outer diameter, inner diameter, width), shape, etc. of the tire T to be tested at the tire test position P. Appropriate lower rims 61 and upper rims 62 are arranged at the tire test position P depending on the tire T.

In the spindle positioning mechanism 2M (FIG. 4), the distance between the upper rim 62 held by the upper holding flange 221 and the lower rim 61 held by the lower holding flange 210A is set in advance according to the width of the tire T. The upper spindle 22 and the lower spindle 21 are relatively positioned in the axial direction of the reference rotation center axis 2S so as to be spaced apart from each other.

The upper spindle 22 includes an upper spindle base end portion 220 (FIG. 6), the above-mentioned upper holding flange 221, an insertion portion 222 inserted into the lower spindle 21 along the axial direction, a guide piece 223, and an upper spindle engagement. It has a joint portion 224 and.

The upper spindle base end 220 (FIG. 6) has a cylindrical shape that constitutes the base end (upper end) of the upper spindle 22. As shown in FIG. 15, the upper spindle base end 220 is connected to the elevating unit 50 described later.

The upper holding flange 221 is connected to the lower end of the upper spindle base end portion 220 and has a function of holding the ring-shaped upper rim 62.

The insertion portion 222 is connected to the upper holding flange 221 from below. The insertion portion 222 includes a cylindrical insertion outer peripheral surface 222S constituting the outer peripheral surface of the insertion portion 222, and has a cylindrical shape centered on a reference rotation center axis 2S (tire rotation center axis CL). As shown in FIG. 5, the insertion portion 222 is inserted into the ring-shaped upper rim 62 so that the upper rim 62 reaches and is held by the upper holding flange 221.

The guide piece 223 is fixed to the lower end of the insertion portion 222 by a plurality of bolts V (FIG. 5), and the insertion portion 222 is inserted into the internal space S described later of the lower spindle 21.

The upper spindle engaging portion 224 (FIGS. 5 and 6) is arranged at a substantially central portion in the vertical direction of the insertion outer peripheral surface 222S of the insertion portion 222. The upper spindle engaging portion 224 (FIG. 6) has a plurality of insertion engaging portions 224A and a plurality of insertion recesses 224B.

The plurality of insertion engaging portions 224A extend in the axial direction of the reference rotation center axis 2S and are arranged at intervals in the rotation direction of the tire T, respectively, and form a part of the insertion outer peripheral surface 222S. Each of the plurality of insertion engaging portions 224A includes a plurality of engaging projections 224AS extending along the rotation direction and arranged adjacent to each other in the axial direction. In the present embodiment, the plurality of engaging protrusions 224AS are arranged so as to extend in a direction (horizontal direction) orthogonal to the axial direction.

On the other hand, the plurality of insertion recesses 224B are arranged so as to extend in the axial direction between the insertion engagement portions 224A adjacent to each other in the rotation direction among the plurality of insertion engagement portions 224A, and are arranged on the insertion outer peripheral surface 222S. Make up a part. The plurality of insertion recesses 224B each have a shape recessed inward in the radial direction with respect to the plurality of insertion engagement portions 224A when viewed from the axial direction. Both ends of the space (groove) formed between the plurality of engaging protrusions 224AS communicate with each other in the space defined by the adjacent insertion recesses 224B.

The guide piece 223 also has a plurality of guide piece convex portions 223A and a plurality of guide piece concave portions 223B so as to correspond to the plurality of insertion engaging portions 224A and the plurality of insertion recesses 224B. FIG. 7). That is, the insertion portion 222 and the guide piece 223 are formed with a plurality of convex portions continuous in the axial direction from the insertion engaging portion 224A to the guide piece convex portion 223A, while the insertion recess 224B to the guide piece concave portion 223B. , A plurality of concave portions continuous in the axial direction are formed.

Further, as shown in FIG. 5, the insertion portion 222 has an air introduction portion 225A and a plurality of air supply portions 225B. The air introduction unit 225A communicates with the air supply mechanism 55 described later, and receives the air supplied from the air supply mechanism 55 into the tire T (the tire internal space). The plurality of air supply units 225B communicate with the air introduction unit 225A and extend radially from the air introduction unit 225A. Each air supply unit 225B communicates with the tire internal space to supply air. The air introduction section 225A and the plurality of air supply sections 225B also function as discharge sections for discharging excess air in order to prevent the tire T from bursting when the tire internal space is sufficiently filled with air. A control valve (not shown) for controlling the discharge of the air is arranged around these.

The lower spindle 21 has a cylindrical spindle body 210. The spindle body 210 constitutes a cylindrical spindle inner peripheral surface 21S. The inner peripheral surface 21S of the spindle defines an opening X (FIG. 5) facing the insertion portion 222 of the upper spindle 22 in the axial direction and an internal space S capable of accepting the insertion portion 222 through the opening X, respectively. The inner diameter of the inner peripheral surface 21S of the spindle is set to be slightly larger than the outer diameter of the insertion portion 222.

In the present embodiment, the spindle main body 210 includes a cylindrical lower holding flange 210A and a cylindrical lower spindle main body 210B, and has an upper and lower two-divided structure. As shown in FIG. 5, the lower holding flange 210A and the lower spindle main body 210B are arranged so as to sandwich the lock piece 250 described later in the vertical direction, and are connected to each other by a plurality of bolts (not shown). The lower holding flange 210A functions as a lower holding portion for holding the lower rim 61 from below. The upper portion of the lower holding flange 210A has an outer diameter smaller than that of the lower portion of the lower holding flange 210A. By inserting the upper portion of the cylindrical lower holding flange 210A into the center of the ring-shaped lower rim 61, the lower portion (flange portion) of the lower holding flange 210A holds the lower rim 61.

The spindle positioning mechanism 2M includes a ring-shaped lock piece 250 (lock member) and a lock drive unit 25. FIG. 8 is a perspective view of the lower spindle 21, the lock piece 250, and the lock drive unit 25 of the tire testing machine 1 according to the present embodiment. 9 to 11 are a plan view, a cross-sectional view, and a perspective view of the lock piece 250 of the tire testing machine 1 according to the present embodiment. FIG. 12 is a perspective view of the upper spindle 22, the upper rim 62, and the lock piece 250 of the tire testing machine 1 according to the present embodiment.

The lock piece 250 is arranged so as to be interposed between the lower holding flange 210A and the lower spindle main body 210B, and has a cylindrical piece inner peripheral surface 250S (locking inner peripheral surface). The piece inner peripheral surface 250S is arranged so as to be connected to the spindle inner peripheral surface 21S (FIG. 5) along the axial direction, and defines the internal space S together with the spindle inner peripheral surface 21S. The lock piece 250 is mounted on the lower spindle 21 so that it is restrained by the lower spindle 21 in the axial direction (vertical direction) and can rotate relative to the lower spindle 21 around the reference rotation center axis 2S. Further, the lock piece 250 can be locked so as to restrain the insertion portion 222 of the upper spindle 22 inserted in the internal space S in the axial direction. When the tire T is filled with air during the test on the tire T, the lock piece 250 rotates integrally with the spindle body 210 around the reference rotation center axis 2S. On the other hand, the lock drive unit 25 is capable of rotating the lock piece 250 relative to the lower spindle 21 around the reference rotation center axis 2S before the air is filled and after the air is evacuated. ..

The lock piece 250 has a plurality of lock engaging portions 250A and a plurality of lock recesses 250B (FIGS. 9 to 11).

The plurality of lock engaging portions 250A extend in the axial direction and are arranged at intervals in the rotational direction on the inner peripheral surface 21S of the spindle. Each of the plurality of lock engaging portions 250A includes a plurality of locking projections 250AS (FIG. 8) extending along the rotation direction and arranged adjacent to each other in the axial direction.

The plurality of lock recesses 250B are respectively arranged on the inner peripheral surface 21S of the spindle so as to extend in the axial direction between the lock engaging portions 250A adjacent to each other in the rotational direction among the plurality of lock engaging portions 250A. Each of the plurality of lock engaging portions 250A when viewed from the axial direction has a shape recessed outward in the radial direction (FIG. 9).

The inner diameter of the lock recess 250A is larger than the outer diameter of the insertion recess 224B and smaller than the outer diameter of the insertion engagement 224A, and the inner diameter of the lock recess 250B is the inner diameter of the insertion recess 224A. It is set larger than the outer diameter. The interrelationship of these magnitudes is set so that the air supplied to the tire internal space by the air supply mechanism 55 can withstand a large axial force generated on the upper spindle 22 and the lower spindle 21.

13 and 14 are perspective views of the lock drive unit 25 of the tire testing machine 1 according to the present embodiment. Note that FIG. 14 shows a state in which the base top plate 254C described later is removed as compared with FIG.

The structure of the upper end portion of the lower spindle main body 210B of the lower spindle 21 will be described with reference to FIGS. 5 and 8. A pair of lock piece restraint portions 210B1 are arranged at the upper end portion of the lower spindle main body portion 210B. The pair of lock piece restraint portions 210B1 are portions each having a predetermined width in the radial direction and extending in an arc shape. The pair of lock piece restraint portions 210B1 are arranged so as to face each other with respect to the reference rotation center axis 2S. As shown in FIG. 8, a ring-shaped accommodating space 2R communicating with the internal space S is formed inside the pair of lock piece restraint portions 210B1 in the radial direction. The accommodation space 2R is a space for accommodating the lock piece 250 described above. The outer peripheral surface of the pair of lock piece restraint portions 210B1 is defined as the spindle outer peripheral surface 2W. The spindle outer peripheral surface 2W constitutes a part of the outer peripheral surface of the lower spindle 21.

Further, a pair of communication spaces 2T (communication spaces) are formed between the pair of lock piece restraint portions 210B1. The pair of communication spaces 2T are fan-shaped spaces that communicate the outer peripheral surface 2W of the spindle and the accommodation space 2R along the radial direction, respectively.

The lock drive unit 25 includes a slide cylinder 255 (drive source) and a transmission mechanism 25H (FIGS. 13 and 14).

The slide cylinder 255 is supported by a support portion (not shown) on the radial outer side of the lower spindle 21. The slide cylinder 255 is a hydraulic cylinder that generates a driving force for rotating the lock piece 250.

The transmission mechanism 25H has a function of transmitting the driving force of the slide cylinder 255 to the lock piece 250 through the communication space 2T so that the lock piece 250 is rotated around the reference rotation center axis 2S by the driving force of the slide cylinder 255. There is.

The transmission mechanism 25H includes a rotary gear 251, a pair of connecting members 252, and a rotary transmission unit 25K.

The rotary gear 251 is fitted (supported) on the outer peripheral surface 2W of the spindle of the pair of lock piece restraint portions 210B1 so as to be rotatable around the reference rotation center axis 2S on the radial outer side of the communication space 2T. .. The rotary gear 251 is a ring-shaped member arranged concentrically with the lock piece 250, and a plurality of gear portions 251A (first gear teeth) are formed on the outer peripheral portion of the rotary gear 251 (FIG. 13).

The pair of connecting members 252 are inserted into the communication space 2T, respectively, and the rotary gear 251 and the lock piece 250 are rotated in the radial direction so that the rotary gear 251 and the lock piece 250 can rotate integrally around the reference rotation center axis 2S. Connect to each other. The number of connecting members 252 is not limited to two, and at least one connecting member 252 may connect the lock piece 250 and the rotary gear 251.

The rotation transmission unit 25K can be brought into contact with and detached from a plurality of gear portions 251A of the rotation gear 251 so that the rotation gear 251 can be rotated around the reference rotation center axis 2S by the driving force of the slide cylinder 255. In addition, the driving force is transmitted to the rotary gear 251.

The rotation transmission unit 25K includes a rack 253, a rack base 254, and a rotation cylinder 256 (contact / separation drive unit).

As shown in FIG. 14, the rack 253 is a member having a longitudinal shape, is arranged adjacent to each other along the longitudinal direction (one horizontal direction), and is arranged with a plurality of gear portions 251A of the rotary gear 251. Each includes a plurality of rack gears 253A (second gear teeth) that can be engaged with each other.

The rack base 254 is a member that accommodates the rack 253 so that it can be slidably moved (reciprocated). The rack base 254 has a base main body 254A, a cylinder holding portion 254B, and a base top plate 254C. The base body 254A is configured to surround one side and the bottom of the rack 253, and is swingably supported by a fixing base 25S (FIG. 14) fixed to a supporting housing (not shown). Specifically, a base hole portion 254S is formed in the base main body 254A, and a rack base fulcrum 25T projecting upward from the fixing base 25S is inserted into the base hole portion 254S, whereby the rack base 254 is racked. It can swing horizontally around the base fulcrum 25T.

The cylinder holding portion 254B is an L-shaped member fixed to the base end portion of the base main body 254A, and holds the slide cylinder 255.

The base top plate 254C is removable from the base main body 254A and covers the upper surface portion of the base main body 254A.

Further, a pair of guide rollers 257 are rotatably supported on the tip end side of the base body 254A. The pair of guide rollers 257 guide the sliding movement of the rack 253. Further, a rack guide hole 253S is formed in the rack 253 along the longitudinal direction, and a rack guide pin 254A1 projecting upward from the base main body 254A is inserted into the rack guide hole 253S from below. As a result, the rack guide pin 254A1 also guides the slide movement of the rack 253.

The rotary cylinder 256 uses the rack 253 as a reference rotation center axis with respect to the rotary gear 251 so that the rack 253 can be engaged with and disengaged from the plurality of gear portions 251A and the plurality of rack gears 253A. It is a hydraulic cylinder that can be brought in and out along a direction orthogonal to (intersecting) 2S. A pin is arranged at the tip of the rotating cylinder rod 256S of the rotating cylinder 256, and the pin is inserted into a long-hole rack base guide hole 254A2 formed in the base body 254A.

The slide cylinder 255 is capable of reciprocating the rack 253 along the one direction in a state where the plurality of gear portions 251A and the plurality of rack gears 253A are engaged with each other.

FIG. 15 is an upward perspective view of the elevating unit 50 of the tire testing machine 1 according to the present embodiment, and FIG. 16 is an enlarged perspective view of a part of the elevating unit 50 of FIG. FIG. 17 is a downward perspective view of the elevating unit 50 of the tire testing machine 1 according to the present embodiment, and FIG. 18 is an enlarged perspective view of a part of the elevating unit 50 of FIG. Further, FIG. 19 is a plan view of the elevating unit 50 of the tire testing machine 1 according to the present embodiment, and FIG. 20 is an enlarged plan view of a part of the elevating unit 50 of FIG.

With reference to FIGS. 15 and 16, the elevating unit 50 includes an elevating bracket 510, a guided frame 511, a pair of front and rear diagonal frames 512, a base plate 515, a pair of rotation phase sensors 516, and four front, rear, left and right. It has an offset adjusting screw 517 and an air supply mechanism 55. Further, the above-mentioned upper spindle 22 further has an upper spindle flange 227 (FIG. 16) connected to the upper spindle base end portion 220 (FIGS. 6 and 15).

The elevating bracket 510, the guided frame 511, and the pair of front and rear diagonal frames 512 form a frame for elevating and lowering the upper spindle 22. The elevating bracket 510 has a rectangular shape extending in the front-rear and left-right directions. A plate-shaped bracket central portion 510A is arranged at the central portion of the elevating bracket 510 in the front-rear direction. The guided frame 511 is erected upward from the right side edge of the elevating bracket 510, and has a rectangular shape extending in the front-rear and up-down directions. The guided frame 511 is supported so as to be movable (up and down) up and down by a pair of guide frames 102A of the upper frame 102. The pair of front and rear diagonal frames 512 connect the elevating bracket 510 and the guided frame 511 to each other to maintain the rigidity of the elevating unit 50.

The base plate 515 is a member mounted on the bracket central portion 510A of the elevating bracket 510, and has a disk-shaped portion and a cylindrical portion (base plate boss portion 515S). The center of the base plate 515 coincides with the reference rotation center axis 2S. As shown in FIGS. 17 and 18, a circular opening having an inner diameter smaller than the outer diameter of the base plate 515 is formed in the bracket central portion 510A, and the central portion (base plate) of the base plate 515 is formed through the opening. The boss portion 515S) is exposed so as to extend downward.

The upper spindle flange 227 is a member that can rotate around the reference rotation center axis 2S integrally with the insertion portion 222 of the upper spindle 22. As shown in FIG. 16, the upper spindle flange 227 is mounted on the base plate 515, and the center of the upper spindle flange 227 coincides with the reference rotation center axis 2S. The upper spindle flange 227 is opened with four holes 227A at equal intervals along the circumferential direction. The hole 227A is formed so as to penetrate the upper spindle flange 227 in the vertical direction. On the other hand, the base plate 515 is provided with four base plate pins 515R (FIG. 20) that can be inserted into the holes 227A so as to project upward.

When the four base plate pins 515R are inserted into the four holes 227A, the elevating bracket 510 prevents the upper spindle 22 including the upper spindle flange 227 from rotating around the reference rotation center axis 2S. On the other hand, when the upper spindle flange 227 of the upper spindle 22 moves upward relative to the base plate 515 and the four base plate pins 515R are separated from the four holes 227A, respectively, the upper spindle including the upper spindle flange 227 22 is free to rotate around the reference rotation center axis 2S.

The four offset adjusting screws 517 are arranged at the central portion 510A of the bracket so as to urge the outer peripheral surface of the base plate 515 inward in the radial direction. By adjusting the tightening amount of each offset adjusting screw 517, it is possible to adjust the offset amount of the upper spindle 22 including the upper spindle flange 227.

The pair of rotational phase sensors 516 (FIG. 16) are spaced apart along the rotational direction of the upper spindle 22 (tire T) and are supported by brackets 516S fixed on the base plate 515. On the other hand, the above-mentioned upper spindle flange 227 has a detected portion 229 arranged on the outer peripheral portion thereof. The detected portion 229 is an L-shaped sheet metal member, and has a portion extending upward in the vicinity of the outer peripheral portion of the upper spindle flange 227. When the upper spindle flange 227 rotates around the reference rotation center axis 2S together with the upper spindle 22, the pair of rotation phase sensors 516 detect the detected portion 229, so that the rotation and phase of the upper spindle flange 227 can be detected. ..

The air supply mechanism 55 extends from a compressor (not shown) and supplies air to the above-mentioned air introduction portion 225A through the inside of the cylinder of the upper spindle flange 227 and the upper spindle base end portion 220. That is, the air supply mechanism 55 is in a space defined by the upper rim 62, the tire T, and the lower rim 61 in a state where the upper spindle 22 and the lower spindle 21 support the tire T via the upper rim 62 and the lower rim 61. It is possible to fill a certain tire internal space with air.

With reference to FIGS. 16 to 18, the elevating unit 50 further includes an elevating detection sensor 518 and a sensor bracket 518A. Further, at a position of the base plate 515 adjacent to the pair of rotational phase sensors 516, a base plate notch portion 515A having a shape in which the base plate 515 is partially cut out is formed. The elevation detection sensor 518 is supported by the sensor bracket 518A so as to be arranged in the base plate notch 515A. The sensor bracket 518A supports the elevating detection sensor 518 at its tip, and its base end is fixed to the lower surface of the bracket central portion 510A. The elevating detection sensor 518 is a sensor capable of detecting the lower surface portion of the upper spindle flange 227, and detects the relative elevating and lowering of the upper spindle flange 227 with respect to the base plate 515. In another embodiment, the base end portion of the bracket central portion 510A may be fixed to the upper spindle flange 227. In this case, even if the offset position of the base plate 515 is finely adjusted by the four offset adjusting screws 517, the elevating detection sensor 518 can stably detect the lower surface portion of the upper spindle flange 227.

FIG. 21 is a block diagram of the tire testing machine 1 according to the present embodiment. The tire testing machine 1 further includes a control unit 90, a plurality of tire detection sensors 91, an input unit 92, a lower spindle rotation drive unit 93, and an upper spindle elevating drive unit 94.

The plurality of tire detection sensors 91 are respectively arranged in the transport path of the tire T transported by the tire transport mechanism 3, and detect the transport position of the tire T. When each tire detection sensor 91 detects the tire T, a predetermined detection signal is input to the control unit 90.

The input unit 92 inputs various command information to the control unit 90 when a predetermined test is performed on the tire T, and includes an operation unit and a display operated by an operator. As an example, the operator can input the tire width information which is the information regarding the width of the tire T from the input unit 92. When the tire testing machine 1 has a width detection sensor (not shown) that detects the width of the tire T, the detection result of the width detection sensor may be input to the control unit 90 as the tire width information.

The lower spindle rotation drive unit 93 inputs a rotation drive force to the lower spindle 21, and uses the lower spindle 21 as a reference rotation center axis when the lower spindle 21 and the upper spindle 22 are locked engaged and when the tire T is tested. It is a drive unit that rotates around 2S. The lower spindle rotary drive unit 93 includes a motor or gear (not shown) that is driven by hydraulic power or electric power.

The upper spindle elevating drive unit 94 is a drive unit that elevates and elevates the upper spindle 22 relative to the lower spindle 21 through the elevating unit 50. The upper spindle elevating drive unit 94 includes a motor or gear (not shown) that is driven by hydraulic power or electric power. On the upper side of FIG. 15, bearings 513 constituting the upper spindle elevating drive unit 94 are shown. A feed screw is pivotally supported on the bearing 513 and is connected to an electric motor, a speed reducer, an encoder, or the like (not shown). In the present embodiment, a ball screw is used as the feed screw, but other types of screws such as a trapezoidal screw may be used. Further, mechanical element parts such as couplings may be used as appropriate. Further, instead of the electric motor, a hydraulic driving force such as a hydraulic motor or a hydraulic cylinder may be used in combination with a measuring device such as an encoder or a linear sensor.

The control unit 90 is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory) for storing a control program, a RAM (Random Access Memory) used as a work area of the CPU, and the like. Further, the control unit 90 includes the tire detection sensor 91, the rotation phase sensor 516, the elevating detection sensor 518, the input unit 92, the tire transport mechanism 3, the lower spindle rotation drive unit 93, the upper spindle elevating drive unit 94, and the air supply. The mechanism 55, the lock drive unit 25, and the like are electrically or hydraulically connected. The control unit 90 executes the control program stored in the ROM by the CPU to execute the tire transfer control unit 901, the lower spindle rotation control unit 902, the upper spindle elevating control unit 903, the air supply control unit 904, and the storage unit 905. And the lock drive control unit 906 are made to function respectively.

The tire transfer control unit 901 conveys the tire T by the carry-in conveyor 7, the transfer conveyor 8, and the carry-out conveyor 9 by controlling the above-mentioned drive unit provided in the tire transfer mechanism 3. Further, the tire transport control unit 901 raises and lowers the conveyor 8 between the above-mentioned upper position and the lower position by controlling the ascending / descending operation of the conveyor 8.

When performing a predetermined test on the tire T, the lower spindle rotation control unit 902 integrally rotates the lower spindle 21 and the upper spindle 22 around the reference rotation center axis 2S in a state where the rotation of the upper spindle 22 is permitted. Let me.

The upper spindle elevating control unit 903 controls the elevating operation of the elevating unit 50 (upper spindle 22) by controlling the upper spindle elevating drive unit 94.

The air supply control unit 904 controls the air supply mechanism 55 to execute the work of filling the internal space of the tire T with air.

The storage unit 905 stores various control parameters referred to by the tire transport control unit 901, the lower spindle rotation control unit 902, the upper spindle elevating control unit 903, the air supply control unit 904, and the lock drive control unit 906. ..

The lock drive control unit 906 controls the slide cylinder 255 and the rotating cylinder 256 to rotate the lock piece 250 when the test for the tire T is performed. As a result, the lock of the lower spindle 21 and the upper spindle 22 in the vertical direction and the release of the lock are switched.

FIG. 22 is a side view showing a process in which the tire T is rotatably supported in the tire testing machine 1 according to the present embodiment, and FIG. 23 is a cross-sectional view corresponding to FIG. 22. 24 and 28 are cross-sectional views showing a process in which the tire T is rotatably supported in the tire testing machine 1 as in FIG. 23. 25 to 27 are cross-sectional views showing a process in which the lock piece 250 is rotated in the tire testing machine 1 according to the present embodiment.

When the test on the tire T is executed, as shown in FIG. 22, the lower rim 61 and the upper rim 62 are held by the lower spindle 21 and the upper spindle 22, respectively, and the upper spindle 22 is moved upward with respect to the lower spindle 21. It is considered to have been moved. At this time, in the upper spindle flange 227 of the upper spindle 22, the detected portion 229 is in a state of being detected by the pair of rotational phase sensors 516, and the four base plate pins 515R of the base plate 515 are inserted into the four hole portions 227A, respectively. As a result, the upper spindle 22 including the upper spindle flange 227 is prevented from rotating at a specific rotation position around the reference rotation center axis 2S.

On the other hand, in the lower spindle rotation control unit 902, the plurality of insertion engaging portions 224A of the upper spindle 22 are locked when viewed from the axial direction, in response to the upper spindle 22 being arranged at the specific rotation position. In advance, the insertable state is such that the plurality of insertion recesses 224B of the upper spindle 22 are matched with the plurality of lock recesses 250B of the piece 250, and the plurality of insertion recesses 224B of the upper spindle 22 are matched with the plurality of lock engagement portions 250A of the lock piece 250. The rotation position of the lower spindle 21 is adjusted.

Next, when the tire T is placed on the upstream end of the carry-in conveyor 7, the tire transfer control unit 901 controls the rotation of the carry-in conveyor 7 and the transfer conveyor 8 so that the tire T is carried into the tire test position P. Will be done. At this time, the rotation of the conveyor 8 is stopped so that the tire rotation center axis CL of the tire T matches the reference rotation center axis 2S of the spindle 2. After that, when the tire transfer control unit 901 lowers the transfer conveyor 8, the tire T is delivered from the transfer conveyor 8 to the lower spindle 21. The tire T is placed on the lower rim 61 held by the lower spindle 21 (FIGS. 22 and 23).

Next, the upper spindle elevating control unit 903 lowers the elevating unit 50 so that the distance between the upper rim 62 held by the upper holding flange 221 and the lower rim 61 held by the lower holding flange 210A is the distance between the tire T. The insertion portion 222 of the upper spindle 22 is inserted to a specific position in the internal space S of the lower spindle 21 so as to have a predetermined interval set according to the width (FIG. 24).

In the present embodiment, as shown in FIGS. 5 and 10, the engaging projection 224AS of the insertion engaging portion 224A of the upper spindle engaging portion 224 is the locking projection 250AS of the lock engaging portion 250A of the lock piece 250. It has more stages than the above, and is said to be able to handle a maximum of 16 stages of tire T width. In FIG. 24, the position of the upper spindle 22 is set so that the distance between the lower rim 61 and the upper rim 62 is the largest among the above 16 steps.

Further, in the state shown in FIG. 24, the plurality of insertion engaging portions 224A face each of the plurality of lock recesses 250B in the radial direction centered on the reference rotation center axis 2S.

Next, the lock drive control unit 906 rotates the lock piece 250 from the specific position to a predetermined engagement position, so that a plurality of insertion engagement units 224A are formed in a plurality of radial directions centered on the reference rotation center axis 2S. It faces (fits) the lock engaging portion 250A and locks the lower spindle 21 and the upper spindle 22 (spindle lock). Specifically, the lock drive control unit 906 controls the rotating cylinder 256 (FIG. 13) to rotate the rack base 254 around the rack base fulcrum 25T (push it toward the rack 253). As a result, as shown in FIG. 26 from the state shown in FIG. 25, the rack gear 253A (FIG. 13) of the rack 253 supported by the rack base 254 engages with the gear portion 251A of the rotary gear 251. Next, the lock drive control unit 906 controls the slide cylinder 255 to extend the slide cylinder rod 255A. As a result, the rack gear 253A of the rack 253 moves in the direction of arrow D271 of FIG. 27, and the rotary gear 251 rotates in the direction of arrow DR of FIG. 13 and the direction of arrow D272 of FIG. 27. At this time, the lock piece 250 rotates with respect to the upper spindle 22 and the lower spindle 21 from the state shown in FIG. 26 to the engaging position as shown in FIG. 27. In the present embodiment, the rotation of the rotary gear 251 is transmitted to the lock piece 250 via the pair of connecting members 252, and the lock piece 250 rotates 30 degrees around the reference rotation center axis 2S. As a result, the plurality of locking protrusions 250AS of the plurality of lock engaging portions 250A of the lock piece 250 are placed in the space between the locking protrusions 250AS adjacent to each other in the axial direction. Each of the plurality of engaging protrusions 224AS is received along the rotation direction, and each of the plurality of engaging protrusions 224AS is engaged with the plurality of engaging protrusions 224AS. By this engagement, the upper holding flange 221 of the upper spindle 22 and the lower holding flange 210A of the lower spindle 21 can be relatively positioned in the axial direction, and the distance between the lower rim 61 and the upper rim 62 is fixed. Will be done. When the distance between the lower rim 61 and the upper rim 62 is fixed in this way, the lock drive control unit 906 controls the rotating cylinder 256 to move the rack base 254 around the rack base fulcrum 25T in the opposite direction to the above. Rotate in the direction to separate the rack gear 253A of the rack 253 from the gear portion 251A of the rotary gear 251. As a result, when the test on the tire T is started, it is prevented that a part of the lock drive unit 25 interferes with the rotating lower spindle 21.

When the distance between the lower rim 61 and the upper rim 62 is set according to the width of the tire T to be tested as described above, as shown in FIG. 24, the upper surface portion of the tire T and the outer circumference of the upper rim 62 A slight gap K is formed between the upper rim flange 62F (see FIG. 4) formed in the portion.

Next, the air supply control unit 904 controls the air supply mechanism 55 to perform the air filling operation (tire inflation). Specifically, the air supply control unit 904 is defined by the upper rim 62, the tire T, and the lower rim 61 in a state where the upper spindle 22 and the lower spindle 21 support the tire T via the upper rim 62 and the lower rim 61. Air is filled in the tire internal space, which is a space, through the air supply mechanism 55. As a result, as shown in FIG. 28, the tire T swells and the above-mentioned gap K (FIG. 24) is filled. At this time, the upper bead portion and the lower bead portion of the tire T are brought into close contact with the upper rim 62 and the lower rim 61 by the air. As a result, the lower spindle 21, the upper spindle 22, the lock piece 250, the lower rim 61, the upper rim 62, and the tire T can be integrally rotated around the reference rotation center axis 2S. The pressure in the tire internal space is detected by a pressure gauge (not shown), and the filling operation is performed up to a predetermined set air pressure.

Next, the upper spindle elevating control unit 903 controls the upper spindle elevating drive unit 94 to lower the elevating unit 50 by the lowering amount H (25 mm as an example) in FIG. 28. Since the vertical position of the upper spindle 22 including the upper spindle flange 227 is blocked by the engagement between the upper spindle engaging portion 224 and the lock piece 250, when the elevating unit 50 is lowered as described above, FIG. In, the upper spindle flange 227 rises (floats) relative to the base plate 515. At this time, the lower surface portion of the upper spindle flange 227 is separated upward from the elevating detection sensor 518, and the output signal of the elevating detection sensor 518 changes, so that it is detected that the elevating unit 50 is lowered by the amount of descent H. As a result, the four holes 227A of the upper spindle flange 227 are separated from the four base plate pins 515R of the base plate 515, and the upper spindle 22 including the upper spindle flange 227 can freely rotate around the reference rotation center axis 2S. It is desirable that the elevating detection sensors 518 are arranged in pairs so that the ascending position can be detected in addition to the descending position. Even when the sensor for detecting the descending position is turned off, it is desirable to adopt such a configuration assuming that the four holes 227A are not detached from the four base plate pins 515R of the base plate 515. .. In this case, the lower spindle 21 is rotated while being engaged with the hole 227A from the base plate pin 515R, and it is possible to prevent a part of the device from being damaged.

When the lower spindle rotation control unit 902 rotates the lower spindle 21 in the state shown in FIG. 28, the tire T sandwiched between the lower rim 61 and the upper rim 62 is integrated with the lower spindle 21 and the upper spindle 22 and is the reference rotation center. Rotate around the shaft 2S. Then, as described above, the rotating drum 4 is pressed against the tire T, so that the test of the tire T can be executed. At this time, a large axial force is applied to the upper spindle 22 and the lower spindle 21 via the upper rim 62 and the lower rim 61 by the air filled in the tire internal space. As a result, the relative rotation of the lower spindle 21 and the upper spindle 22 around the reference rotation center axis 2S is suppressed by the contact surface pressure applied between the plurality of engaging protrusions 224AS and the plurality of locking protrusions 250AS. Then, the lower spindle 21 and the upper spindle 22 can rotate integrally. During the test execution of the tire T, the detection signals of the pair of rotational phase sensors 516 are ignored.

After the test on the tire T is completed, the tire T is placed on the conveyor 8 again in the reverse procedure of the above. Then, the marking unit 60 imparts a predetermined marking to the tire T carried out by the transport conveyor 8 and the carry-out conveyor 9. As a result, the test for the tire T is completed.

As described above, the tip of the detected portion 229 has a shape extending in the vertical direction (FIG. 16). Therefore, even when the upper spindle flange 227 is lifted with respect to the base plate 515, the pair of rotational phase sensors 516 can detect the detected portion 229. With this configuration, after the test on the tire T is completed as described above, when the upper spindle 22 including the upper spindle flange 227 is arranged again at a specific rotation position, the pair of rotation phase sensors 516 causes the detected portion 229 to be detected. Can be detected. Therefore, when the upper spindle elevating control unit 903 controls the upper spindle elevating drive unit 94 while the pair of rotational phase sensors 516 detect the detected unit 229, the elevating unit 50 is raised by the lowering amount H. The four base plate pins 515R of the base plate 515 are fitted into the four holes 227A of the upper spindle flange 227, and the rotation of the upper spindle 22 including the upper spindle flange 227 around the reference rotation center axis 2S is prevented. In this state, the lock drive control unit 906 controls the rotary cylinder 256 again to rotate the rack base 254 around the rack base fulcrum 25T, and engage the rack gear 253A of the rack 253 with the gear portion 251A of the rotary gear 251. After that, the slide cylinder 255 is controlled to contract the slide cylinder rod 255A, the lock piece 250 is rotated 30 degrees in the direction opposite to the above, the upper spindle 22 is raised with respect to the lower spindle 21, and the upper spindle 22 is moved to the internal space S. It becomes possible to extract from.

As described above, in the present embodiment, the plurality of insertion engaging portions 224A of the upper spindle 22 match the plurality of lock recesses 250B of the lock piece 250 when viewed from the axial direction, and the plurality of insertion recesses 224B of the upper spindle 22. Is in a state of matching the plurality of lock engaging portions 250A of the lock piece 250 (insertable state), and up to a specific position where the plurality of insertion engaging portions 224A face each of the plurality of lock engaging portions 250A in the rotation direction. The lower spindle 21 can accept the insertion portion 222 of the upper spindle 22 into the internal space S along the axial direction, and the plurality of locking projections 250AS of the plurality of lock engaging portions 250A of the lock piece 250 are adjacent to each other. A plurality of engaging protrusions 224AS of a plurality of insertion engaging portions 224A of the upper spindle 22 are received in the space between the locking protrusions 250AS, respectively, and engaged with the plurality of engaging protrusions 224AS, respectively. By rotating the lock piece 250 to the position, the upper holding flange 221 of the upper spindle 22 and the lower holding flange 210A of the lower spindle 21 can be relatively positioned in the axial direction. The dimensions of the plurality of lock engaging portions 250A and the plurality of lock recesses 250B with respect to the joint portion 224A and the plurality of insertion recesses 224B are set in the radial direction and the circumferential direction centered on the reference rotation center axis 2S, respectively. Then, the lock drive unit 25 can rotate the lock piece 250 around the reference rotation center axis 2S between the specific position and the engagement position.

According to such a configuration, a plurality of engaging protrusions 224AS are arranged adjacent to each other in the axial direction on the insertion engaging portion 224A of the inserting portion 222, while a plurality of engaging projections 224AS are arranged on the lock engaging portion 250A of the lock piece 250. Since the locking protrusions 250AS are arranged adjacent to each other in the axial direction, the distance between the upper rim 62 and the lower rim 61 is increased according to the width of the tire T by making the engaging positions of the protrusions different in the axial direction. Can be easily changed. Further, after inserting the insertion portion 222 of the upper spindle 22 into the internal space S of the lower spindle 21, the lock piece 250 is rotated relative to the lower spindle 21, so that the upper holding flange 221 and the lower spindle 21 of the upper spindle 22 are rotated. The space between the lower holding flange 210A and the lower holding flange 210A can be easily fixed. Then, when the air supply mechanism 55 fills the internal space of the tire T with air, the ring-shaped lock piece 250 evenly applies the axial force applied to the upper spindle 22 and the lower spindle 21 by the air over the entire circumferential direction. I can take it. Therefore, the lock piece 250 is less likely to fall with respect to the reference rotation center shaft 2S due to the axial force. Therefore, every time the tire T is filled with air in the tire testing machine 1, it is possible to prevent any member from being worn and damaged due to strong contact between a part of the lock piece 250 and the upper spindle 22 or the lower spindle 21. Will be done. As a result, the distance between the upper rim 62 and the lower rim 61 can be stably adjusted for a long period of time according to the width of the tire T.

Further, according to the present embodiment, the transmission mechanism 25H transmits the driving force of the slide cylinder 255 arranged outside the lower spindle 21 to the lock piece 250 to rotate the lock piece 250 around the reference rotation center axis 2S. can. Therefore, it is not necessary to arrange the drive source inside the upper spindle 22 or the lower spindle 21, and it is suppressed that the size of the upper spindle 22 or the lower spindle 21 becomes large due to the arrangement of the drive source. Further, since the transmission mechanism 25H transmits the driving force along the radial direction through the communication space 2T formed in the lower spindle 21, the driving force is transmitted as compared with the case where the driving force is transmitted along the axial direction. Transmission path can be shortened.

Further, according to the present embodiment, the rotation transmission unit 25K only transmits the driving force of the slide cylinder 255 to the gear portion 251A of the rotation gear 251 supported by the outer peripheral surface 2W of the spindle on the radial outer side of the lock piece 250. The connecting member 252 can rotate the rotary gear 251 and the lock piece 250 integrally. Therefore, it is not necessary to provide gear teeth on the lock piece 250 arranged in the accommodation space 2R, and it is possible to prevent the structure of the lock piece 250 from becoming complicated. Further, since the rotary gear 251 has gear teeth on the entire circumference, the lock piece 250 inside the lower spindle 12 is rotated from the outside of the lower spindle 21 regardless of the rotation phase (rotation position) of the lower spindle 21. be able to. Since the rotation transmission unit 25K can be brought into contact with and detached from the gear portion 251A of the rotation gear 251. Therefore, when the lock piece 250 is rotated to a predetermined position, the rotation transmission unit 25K is retracted from the rotation gear 251. , It is prevented that the rotation transmission unit 25K interferes with the rotation of each spindle. In another embodiment, instead of the rack 253, a rotary gear similar to the rotary gear 251 may be engaged with the rotary gear 251 from the outside of the lower spindle 21 so as to be detachable.

Further, according to the present embodiment, the rotating cylinder 256 brings the rack 253 into contact with and separated from the rotating gear 251 so that the transmission of the driving force to the rotating gear 251 and the interruption of the transmission can be switched. Further, since the slide cylinder 255 reciprocates the rack 253 along one direction, the lock piece 250 can rotate in the forward and reverse directions about the reference rotation center axis 2S. Therefore, the reciprocating movement causes the upper spindle. The lock of the 22 and the lower spindle 21 and the release of the lock can be switched. That is, the linear power of the slide cylinder 255 arranged outside the spindle can be converted into the rotation of the lock member 250 in the spindle, and the rotation of the lock member can be stably controlled.

Further, in the present embodiment, the plurality of insertion engaging portions 224A of the upper spindle 22 are aligned with the plurality of lock recesses 250B of the lock piece 250 when viewed from the axial direction, and the plurality of insertion recesses 224B of the upper spindle 22 are formed. The distance between the upper rim 62 held by the upper holding flange 221 and the lower rim 61 held by the lower holding flange 210A in the state of matching the plurality of lock engaging portions 250A of the lock piece 250 is the width of the tire T. The upper spindle elevating drive unit 94 can relatively insert the insertion portion 222 of the upper spindle 22 to a specific position in the internal space S of the lower spindle 21 so as to have a predetermined interval set accordingly. .. Further, the lock drive control unit 906 has a plurality of locks of the plurality of engagement protrusions 224AS of the plurality of upper spindle engagement portions 224 and the plurality of lock engagement portions 250A in a state where the insertion portion 222 is arranged at the specific position. The lock piece 250 can be rotated relative to the lower spindle 21 and the upper spindle 22 about the reference rotation center axis 2S so that the protrusion 250AS engages with each other.

According to such a configuration, the upper spindle 22 and the lower spindle 21 are relatively moved in the axial direction by the driving force of the upper spindle elevating drive unit 94 and the lock drive unit 25 without requiring the force of an operator, and then locked. Both spindles can be locked by rotating the piece 250, and the distance between the upper rim 62 and the lower rim 61 can be appropriately set according to the width of the tire T.

Further, in the present embodiment, the rotation phase sensor 516 (rotation detection) capable of detecting that the specific portion (detected portion 229) of the upper spindle 22 has reached a specific rotation position set in advance around the reference rotation center axis 2S. When the rotation phase sensor 516 detects that the specific portion has reached the specific rotation position, the hole portion 227A and the base plate pin 515R (rotation blocking portion) capable of blocking the rotation of the first spindle can be prevented. ) And, are provided in the tire testing machine 1. Then, the upper spindle elevating drive unit 94 relatively inserts the insertion portion 222 of the upper spindle 22 to a specific position in the internal space S of the lower spindle 21 in a state where the rotation of the upper spindle 22 is blocked by the rotation blocking portion. It is possible to do. Further, the lock drive control unit 906 has a plurality of lock drive control units 906 in a state in which the rotation of the upper spindle 22 is blocked by the rotation blocking unit and the insertion unit 222 of the upper spindle 22 is inserted to a specific position in the internal space S of the lower spindle 21. Rotate the lock piece 250 around the reference rotation center axis 2S so that the plurality of engaging protrusions 224AS of the insertion engaging portion 224A and the plurality of locking protrusions 250AS of the plurality of lock engaging portions 250A engage with each other. Is possible.

According to such a configuration, in a state where the rotation of the upper spindle 22 is blocked, the upper spindle 22 and the lower spindle 21 are relatively moved in the axial direction, and then the lock piece 250 is rotated to lock both spindles. Therefore, it is possible to prevent the upper spindle 22 and the lock piece 250 from rotating with each other at the time of locking.

Further, in the present embodiment, a single lock piece 250 having a ring shape centered on the reference rotation center axis 2S is provided, and the plurality of lock engaging portions 250A and the plurality of lock recesses 250B are the single lock pieces 250B. It is formed on the inner peripheral surface 250S of the lock piece 250 of the above.

According to such a configuration, as compared with the case where the lock piece 250 is composed of a plurality of members, the lock piece 250 is prevented from falling during air filling, and the positioning accuracy of the plurality of locking protrusions 250AS is improved. It becomes possible.

Further, in the present embodiment, the engaging protrusion 224AS formed on the insertion engaging portion 224A of the upper spindle engaging portion 224 and the locking protrusion 250AS formed on the lock engaging portion 250A of the lock piece 250 both rotate as a reference. It extends in a direction orthogonal to the central axis 2S. Therefore, when the tire internal space is filled with air, the axial force applied to the lower spindle 21 and the upper spindle 22 can be stably received by the locking protrusion 250AS and the engaging protrusion 224AS.

Although the tire testing machine 1 according to the embodiment of the present invention has been described above, the present invention is not limited to these embodiments, and the following modified embodiments are possible.

(1) In the above embodiment, the engaging protrusion 224AS formed on the insertion engaging portion 224A of the upper spindle engaging portion 224 and the locking protrusion 250AS formed on the lock engaging portion 250A of the lock piece 250 are both provided. Although the description has been made in a mode extending in a direction orthogonal to the reference rotation center axis 2S (usually saw teeth), the present invention is not limited to this. FIG. 29 is a side view of a state in which the upper rim 62 is supported by the upper spindle 22 of the tire testing machine according to the first modification embodiment of the present invention. 30 and 31 are a plan view and a side sectional view of the lock piece 250M of the tire testing machine according to the present deformation embodiment.

In this modified embodiment, the plurality of insertion protrusions of the plurality of insertion engagement portions 224MA of the upper spindle engagement portion 224M have one direction (upper) in the axial direction as they proceed in the rotation direction (direction of the arrow in FIG. 29). It has a spiral shape centered on the reference rotation center axis 2S so as to incline in the direction). On the other hand, the plurality of locking protrusions of the plurality of lock engaging portions 250MA of the lower spindle 21 have a spiral shape centered on the reference rotation center axis 2S so as to incline in the one direction as the rotation direction progresses. It has a spiral shape that can be engaged with the plurality of engaging protrusions along the direction of rotation. In other words, the plurality of engaging protrusions and the plurality of locking protrusions are formed of a part of a screw (screw saw tooth) formed by a predetermined lead about the reference rotation center axis 2S.

As an example, when the lead has a half pitch and a plurality of insertion recesses 224MB and a plurality of lock recesses 250MB are arranged at six locations in the circumferential direction, a plurality of insertion engagement portions 224MA and a plurality of lock recesses 224MB are arranged. When the lower spindle 21 is rotated 180 degrees while the lock engaging portion 250MA is engaged, the distance (rim width) between the lower rim 61 and the upper rim 62 can be changed by a quarter pitch. can. On the other hand, when the leads have one pitch and a plurality of insertion recesses 224MB and a plurality of lock recesses 250MB are arranged at eight locations in the circumferential direction, the plurality of insertion engagement portions 224MA and the plurality of lock engagement portions 250MA are arranged. By rotating the lower spindle 21 by 90 degrees while the lower rim 21 is engaged, the distance (rim width) between the lower rim 61 and the upper rim 62 can be changed by a quarter pitch.

As described above, in the present modification embodiment, not only the relative positions of the upper spindle engaging portion 224 and the lock piece 250 in the axial direction but also the relative positions (rotational positions) in the circumferential direction of the upper rim 61 and the lower rim 61. Since the distance from the upper rim 62 can be adjusted, a fine rim width can be set. In the screw structure described above, the plurality of insertion engaging portions 224MA and the plurality of lock engaging portions 250MA may be arranged along one continuous virtual spiral shape, or may be spaced apart from each other along the axial direction. It may be arranged along a plurality of virtual spiral shapes arranged in place.

(2) Further, in the above embodiment, as shown in FIG. 5, the inner peripheral surface 21S of the spindle of the lower spindle 21 and the insertion portion 222 of the upper spindle 22 are precisely fitted to each other above and below the lock piece 250. A matching first support portion 21P and a second support portion 21Q are arranged. According to such a configuration, since the distance between the first support portion 21P and the second support portion 21Q in the axial direction is large, the reference rotation center axis of the upper spindle 22 when a lateral load is applied to the upper spindle 22. The inclination (fall) with respect to 2S can be reduced. The present invention is not limited to this. The first support portion 21P and the second support portion 21Q, in which the inner peripheral surface 21S of the spindle 21 of the lower spindle 21 and the insertion portion 222 of the upper spindle 22 are precisely fitted to each other, are provided at locations other than the positions shown in FIG. May be good.

(3) The pair of rotational phase sensors 516 shown in the above embodiment may be arranged at a plurality of locations in the circumferential direction. For example, as a tire test, a case where marking is performed on the hardest phase of the tread portion of the tire T will be described. The marking unit 60 in the present embodiment gives a predetermined marking to the tire T placed on the carry-out conveyor 9 according to the test result at the tire test position P. By the way, the phase in which the tire T is marked is limited to one phase (phase fixed). Therefore, when the tire T is placed on the carry-out conveyor 9, it is necessary that the tire T is phase-aligned to the one phase in advance. When a pair of rotational phase sensors 516 are arranged at a plurality of locations in the circumferential direction in this way, the upper spindle flange 227 is the current upper spindle flange 227 among the positions where the plurality of pairs of rotational phase sensors 516 are arranged. Since the rotation can be stopped at the phase closest to the above, the rotation amount of the lower spindle 21 is suppressed when the engagement between the upper spindle engaging portion 224 and the lock piece 250 is released, and the cycle time in the rotation of the spindle 2 is shortened. can do.

(4) In the above embodiment, the lower spindle rotation control unit 902 rotates the lower spindle 21 in a state where the rotation of the upper spindle 22 is blocked, so that the upper spindle engaging portion 224 and the lock piece 250 are engaged. And described in the embodiment of disengaging the engagement, by rotating the upper spindle 22 in a state where the rotation of the lower spindle 21 is blocked, the upper spindle engaging portion 224 and the lock piece 250 are engaged and engaged. The engagement may be disengaged. Further, the relative insertion operation between the lower spindle 21 and the upper spindle 22 for inserting the insertion portion 222 of the upper spindle 22 into the internal space S of the lower spindle 21 is not limited to the raising and lowering of the upper spindle 22. Instead, the lower spindle 21 may move up and down with respect to the upper spindle 22.

(5) Further, in the above embodiment, the upper spindle 22 has the insertion portion 222 and the lower spindle 21 has the cylindrical internal space S. That is, the upper spindle 22 may have a cylindrical internal space S, and the lower spindle 21 may have an insertion portion 222. When a cylindrical internal space S is formed in the lower spindle 21 and a cylindrical insertion portion 222 is formed in the upper spindle 22 as in the above embodiment, the length of the lower spindle 21 in the vertical direction is formed. Becomes shorter. Therefore, the height of the conveyor 8 that transfers the lower rim 61 to and from the lower spindle 21 can be lowered, and the height of the transport path of the tire transport mechanism 3 can be set to be similarly low. It becomes.

(6) Further, in the above embodiment, the lower spindle 21 and the upper spindle 22 are in a state where the upper spindle 22 including the upper spindle flange 227 is constrained to a specific rotation position detected by the pair of rotation phase sensors 516. Although described in the manner in which the engagement is performed, the present invention is not limited thereto. In a state where the upper spindle 22 is arranged at an arbitrary rotation position around the reference rotation center axis 2S, the rotation may be blocked and the lower spindle 21 and the upper spindle 22 may be engaged with each other. That is, instead of the pair of rotation phase sensors 516 described above, an encoder (not shown) arranged on the rotation axis of the upper spindle 22 as the rotation detection unit of the present invention is around the reference rotation center axis 2S of the specific portion of the upper spindle 22. Detects the rotation position of. Further, when the rotation of the upper spindle 22 is stopped, a brake mechanism or the like that mechanically contacts the upper spindle 22 prevents the rotation of the upper spindle 22 as a rotation blocking portion of the present invention. Then, in the lower spindle rotation drive unit 93, in a state where the rotation of the upper spindle 22 is blocked by the rotation blocking unit, the plurality of insertion engaging portions 224A of the upper spindle 22 when viewed from the axial direction are a plurality of the lower spindle 21. The lower spindle 21 is referred to according to the detection result of the encoder so that the plurality of insertion recesses 224B of the upper spindle 22 match the lock recesses 250B of the lower spindle 21 and the plurality of insertion recesses 224B of the upper spindle 22 respectively match the lock engagement portions 250A of the lower spindle 21. Rotate around the rotation center axis 2S.

According to such a configuration, the lock piece 250 and the upper spindle engaging portion 224 of the upper spindle 22 are aligned in the rotational direction in order to adjust the rim width without stopping the upper spindle 22 at a specific rotational position. Can be easily performed.

Further, in the present modification embodiment, in the upper spindle elevating drive unit 94, the rotation of the upper spindle 22 is blocked by the rotation blocking portion, and the plurality of insertion engaging portions 224A match the plurality of lock recesses 250B, respectively. With the plurality of insertion recesses 224B matching the plurality of lock engagement portions 250A, the insertion portion 222 of the upper spindle 22 can be relatively inserted to a specific position in the internal space S of the lower spindle 21. .. Further, in the lock drive control unit 906, the rotation of the upper spindle 22 is blocked by the rotation blocking unit, and the insertion unit 222 is inserted to the specific position in the internal space S. The lock piece 250 can be rotated around the reference rotation center axis 2S so that the engaging projection 224AS of the above and the plurality of locking projections 250AS of the plurality of lock engaging portions 250A engage with each other.

According to such a configuration, the insertion portion 222 of the upper spindle 22 can be easily inserted into the internal space S of the lower spindle 21 without stopping the upper spindle 22 at a specific rotation position, and the upper spindle engaging portion 224 and the insertion portion 222 can be easily inserted. The lock pieces 250 can be engaged with each other. Therefore, both spindles can be locked by rotating the lock piece 250 after the upper spindle 22 and the lower spindle 21 are relatively moved in the axial direction. Therefore, the upper spindle 22 and the lock piece 250 at the time of locking can be locked. Can prevent each other from moving around. In this modified embodiment as well, the lower spindle 21 may be moved up and down with respect to the upper spindle 22 in order to insert the insertion portion 222 into the internal space S. That is, in the present invention, "one spindle" and "the other spindle" may be selectively set from the lower spindle 21 and the upper spindle 22, that is, opposite to the above embodiment.

(7) Further, in the above embodiment, the elevating unit 50 rotatably supports the upper spindle 22 even when the test is executed on the tire T, but the present invention is not limited thereto. .. After the lower spindle 21 and the upper spindle 22 are engaged (locked), the elevating unit 50 is separated from the upper spindle 22, and the lower spindle 21 and the upper spindle 22 are supported by the lower spindle 21. A mode in which the 22 and the 22 are integrally rotated may be used. In this case, it is desirable that the air supply mechanism 55 or the like provided in the elevating unit 50 is arranged so as to communicate with the inside of the tire T through the periphery or the inside of the lower spindle 21.

(8) Further, in the above embodiment, in the upper spindle engaging portion 224 and the lock piece 250, the insertion engaging portion 224A and the lock engaging portion 250A are arranged six by six. The number is not limited to six, and may include a number of insertion engaging portions 224A and lock engaging portions 250A that can be engaged with each other.

1 Tire tester 1S Main body frame 2 Spindle 21 Lower spindle (other spindle, second spindle)
210 Spindle body 210A Lower holding flange 210B Lower spindle body 21S Spindle inner peripheral surface 22 Upper spindle (one spindle, first spindle)
220 Upper spindle base end 221 Upper holding flange 222 Inserting part 222S Inserting outer peripheral surface 223 Guide piece 224 Upper spindle engaging part 224A Inserting engaging part 224AS Engaging protrusion 224B Inserting recess 227 Upper spindle flange 227A Hole (rotation blocking part)
25 Lock drive 250 Lock piece (lock member)
250A Lock engagement part 250AS Lock protrusion 250B Lock recess 250S Piece inner peripheral surface (lock inner peripheral surface)
251 Rotating gear 251A Gear part (1st gear tooth)
252 Connecting member 253 Rack 253A Rack gear (second gear tooth)
255 slide cylinder (drive source)
256 rotating cylinder (contact / separation drive unit)
25H Transmission mechanism 25K Rotation transmission part 2M Spindle positioning mechanism 2S Reference rotation center axis 2T Communication space 3 Tire transfer mechanism 4 Rotation drum 4A Simulated road surface 50 Elevating unit 51 Elevating frame 510 Elevating bracket 515 Base plate 515R Base plate pin (rotation blocking part)
516 Rotational phase sensor (Rotation detector)
518 Elevation detection sensor 55 Air supply mechanism 60 Marking unit 61 Lower rim 62 Upper rim 90 Control unit 901 Tire transfer control unit 902 Lower spindle rotation control unit 903 Upper spindle elevation control unit 904 Air supply control unit 905 Storage unit 906 Lock drive control unit 93 Lower spindle rotation drive unit (rotation drive unit)
94 Upper spindle elevating drive unit (insertion drive unit)
CL Tire rotation center axis P Tire test position S Internal space T Tire X Opening V Bolt

Provided by the present invention is to rotate the tire in a horizontal posture in which the rotation center axis of the tire extends in the vertical direction at a predetermined tire test position around the rotation center axis, and perform a predetermined test on the tire. It is a tire testing machine that performs. The tire testing machine has a lower holding portion capable of holding a lower rim mounted on a lower bead portion which is a bead portion located on the lower side of the tire in a horizontal posture, and the tire. Is mounted on a lower spindle that supports the tire via the lower rim so that the tire can rotate around the center axis of rotation, and an upper bead portion that is a bead portion located on the upper side of the tire in a horizontal posture. An upper spindle that has an upper holding portion capable of holding the upper rim and supports the tire via the upper rim so that the tire can rotate around the rotation center axis, and the upper spindle. And with the lower spindle supporting the tire via the upper rim and the lower rim, the tire internal space, which is the space defined by the upper rim, the tire and the lower rim, can be filled with air. The distance between the possible air supply mechanism and the upper rim held by the upper holding portion and the lower rim held by the lower holding portion becomes a predetermined distance preset according to the width of the tire. As described above, a spindle positioning mechanism for relatively positioning the upper spindle and the lower spindle in the axial direction of the rotation center axis is provided. The central axis of rotation is such that one of the lower spindle and the upper spindle is inserted along the axial direction into the other spindle, which is different from the lower spindle and the one spindle of the upper spindle. The other spindle has an opening facing the insertion portion of the one spindle in the axial direction and an internal space capable of accepting the insertion portion through the opening. It has a cylindrical spindle inner peripheral surface that defines each of the above. The insertion portion is arranged with a cylindrical insertion outer peripheral surface constituting the outer peripheral surface of the insertion portion and a part of the insertion outer peripheral surface that extends in the axial direction and is spaced apart from each other in the rotation direction of the tire. A plurality of insert-engagement portions constituting the plurality of insert-engagement portions, each including a plurality of insertion protrusions extending along the rotation direction and arranged adjacent to each other in the axial direction, and the plurality of insertion-engagement portions. A plurality of insertion recesses that are arranged so as to extend in the axial direction between the insertion engagement portions that are adjacent to each other in the rotation direction and form a part of the insertion outer peripheral surface. It has a plurality of insertion recesses each having a shape recessed inward in the radial direction with respect to the plurality of insertion engagement portions when viewed from the axial direction. The spindle positioning mechanism includes a locking inner peripheral surface which is arranged so as to be continuous with the spindle inner peripheral surface along the axial direction and defines the internal space together with the spindle inner peripheral surface, and the shaft is provided by the other spindle. A ring-shaped lock member mounted on the other spindle so as to be constrained in a direction and rotatable relative to the other spindle around the rotation center axis, and the one inserted into the internal space. A lock member capable of locking the insertion portion of the spindle in the axial direction, and a lock drive portion capable of rotating the lock member relative to the other spindle around the rotation center axis. Has. The lock member is a plurality of lock engaging portions that extend in the axial direction and are arranged at intervals in the rotation direction on the inner peripheral surface for the lock, and extend along the rotation direction. Between a plurality of lock engaging portions including a plurality of locking protrusions arranged adjacent to each other in the axial direction and the lock engaging portions adjacent to each other in the rotational direction among the plurality of lock engaging portions. A plurality of lock recesses, which are respectively arranged on the inner peripheral surface for the lock so as to extend in the axial direction, and each have a shape recessed outward in the radial direction with respect to the plurality of lock engaging portions when viewed from the axial direction. Has. When viewed from the axial direction, the plurality of insertion engaging portions of the one spindle match the plurality of lock recesses of the lock member, and the plurality of insertion recesses of the one spindle are the plurality of insertion recesses of the lock member. In an insertable state in which the plurality of insertion engagement portions are in a state of matching the lock engagement portions of the above, the other spindle is moved to a specific position where the plurality of insertion engagement portions face each of the plurality of lock engagement portions in the rotation direction. The insertion portion of the spindle can be received into the internal space along the axial direction, and the plurality of locking protrusions of the plurality of lock engaging portions of the lock member are adjacent to each other in the axial direction. each engagement position respectively engaging and receiving said plurality of engaging projections along the plurality of engaging projections of the plurality of insertion engagement section of the one spindle to the rotational direction in the space between the locking projection By rotating the lock member up to, the plurality of insertions are provided so that the upper holding portion of the upper spindle and the lower holding portion of the lower spindle can be relatively positioned in the axial direction. The dimensions of the plurality of lock engaging portions and the plurality of lock recesses in the radial direction and the circumferential direction about the rotation center axis are set for the joint portion and the plurality of insertion recesses, respectively, and the lock drive portion is set. Can rotate the lock member around the rotation center axis between the specific position and the engagement position.

In the above configuration, the rotation transmission unit includes a plurality of second gear teeth arranged adjacent to each other along one horizontal direction and capable of engaging with the plurality of first gear teeth of the rotating gear. , The rack is centered on the rotating gear so that the engagement and disengagement of the rack, the plurality of first gear teeth and the plurality of second gear teeth can be switched. It has a contact / disengagement drive unit that can be brought into contact with each other along a direction orthogonal to the axis, and the drive source is in a state where the first gear tooth and the second gear tooth are engaged with each other. It is desirable that the rack can be reciprocated along the one direction.

In the above configuration, a rotation detecting unit capable of detecting the rotation position of a specific portion of the one spindle around the rotation center axis, a rotation blocking unit capable of blocking the rotation of the one spindle, and the rotation blocking unit. In a state where the rotation of the one spindle is blocked by the portion, the plurality of insertion engaging portions of the one spindle are aligned with the plurality of lock recesses of the other spindle when viewed from the axial direction. The other spindle is moved around the rotation center axis according to the detection result of the rotation detection unit so that the plurality of insertion recesses of one spindle match the plurality of lock engagement portions of the other spindle. It is desirable to further include a rotation drive unit capable of rotating.

In the above configuration, in the insertion drive unit, the rotation blocking portion blocks the rotation of one of the spindles, the plurality of insertion engaging portions match the plurality of lock recesses, and the plurality of insertion recesses form the plurality of insertion recesses. The insertion portion of the one spindle can be relatively inserted to the specific position in the internal space of the other spindle in a state of matching each of the plurality of lock engagement portions, and the lock drive portion can be inserted. With the plurality of engaging protrusions of the plurality of insertion engaging portions in a state where the rotation of the one spindle is blocked by the rotation blocking portion and the insertion portion is inserted to the specific position in the internal space. It is desirable that the lock member can be rotated around the rotation center axis so that the plurality of locking protrusions of the plurality of lock engaging portions engage with each other.

Further, in the present embodiment, the rotation phase sensor 516 (rotation detection) capable of detecting that the specific portion (detected portion 229) of the upper spindle 22 has reached a specific rotation position set in advance around the reference rotation center axis 2S. When the rotation phase sensor 516 detects that the specific part has reached the specific rotation position, the hole 227A and the base plate pin 515R (rotation prevention part) capable of blocking the rotation of the upper spindle 22. And, are provided in the tire testing machine 1. Then, the upper spindle elevating drive unit 94 relatively inserts the insertion portion 222 of the upper spindle 22 to a specific position in the internal space S of the lower spindle 21 in a state where the rotation of the upper spindle 22 is blocked by the rotation blocking portion. It is possible to do. Further, the lock drive control unit 906 has a plurality of lock drive control units 906 in a state in which the rotation of the upper spindle 22 is blocked by the rotation blocking unit and the insertion unit 222 of the upper spindle 22 is inserted to a specific position in the internal space S of the lower spindle 21. Rotate the lock piece 250 around the reference rotation center axis 2S so that the plurality of engaging protrusions 224AS of the insertion engaging portion 224A and the plurality of locking protrusions 250AS of the plurality of lock engaging portions 250A engage with each other. Is possible.

Claims (9)

A tire testing machine that performs a predetermined test on the tire by rotating the tire in a horizontal posture in which the rotation center axis of the tire extends in the vertical direction at a predetermined tire test position around the rotation center axis.
The tire has a lower holding portion capable of holding a lower rim mounted on a lower bead portion which is a bead portion located on the lower side of the tire in a horizontal posture, and the tire is around the rotation center axis. With a lower spindle that supports the tire via the lower rim so that it can rotate
It has an upper holding portion capable of holding an upper rim mounted on an upper bead portion which is a bead portion located on the upper side of the tire in a horizontal posture, and the tire is around the rotation center axis. An upper spindle that supports the tire via the upper rim so that it can rotate,
With the upper spindle and the lower spindle supporting the tire via the upper rim and the lower rim, the tire internal space, which is a space defined by the upper rim, the tire and the lower rim, is filled with air. With an air supply mechanism that can be
With the upper spindle so that the distance between the upper rim held by the upper holding portion and the lower rim held by the lower holding portion becomes a predetermined distance preset according to the width of the tire. A spindle positioning mechanism that relatively positions the lower spindle in the axial direction of the rotation center axis,
With
The central axis of rotation is such that one of the lower spindle and the upper spindle is inserted along the axial direction into the other spindle different from the lower spindle and the upper spindle. It has a columnar insertion part centered on
The other spindle has a cylindrical spindle inner peripheral surface that defines an opening facing the insertion portion of the one spindle in the axial direction and an internal space that can accept the insertion portion through the opening. Have and
The insertion part is
The cylindrical insertion outer peripheral surface that constitutes the outer peripheral surface of the insertion portion, and
A plurality of insertion engaging portions that extend in the axial direction and are arranged at intervals in the rotation direction of the tire to form a part of the insertion outer peripheral surface, and extend along the rotation direction and are described above. A plurality of insertion engagement portions including a plurality of engagement protrusions arranged adjacent to each other in the axial direction, and a plurality of insertion engagement portions.
A plurality of insertion recesses that are arranged so as to extend in the axial direction between the insertion engagement portions that are adjacent to each other in the rotation direction among the plurality of insertion engagement portions and that form a part of the insertion outer peripheral surface. A plurality of insertion recesses each having a shape recessed inward in the radial direction with respect to the plurality of insertion engagement portions when viewed from the axial direction.
Have,
The spindle positioning mechanism is
A locking inner peripheral surface that is arranged so as to be continuous with the inner peripheral surface of the spindle along the axial direction and defines the internal space together with the inner peripheral surface of the spindle is included, and is constrained in the axial direction by the other spindle and said. A ring-shaped lock member mounted on the other spindle so that it can rotate relative to the other spindle around the center axis of rotation, and the insertion portion of the one spindle inserted into the internal space. With a lock member capable of locking in the axial direction,
It has a lock drive unit capable of rotating the lock member relative to the other spindle about the rotation center axis.
The lock member is
A plurality of lock engaging portions extending in the axial direction and arranged at intervals in the rotational direction on the inner peripheral surface for locking, extending along the rotational direction and mutually extending in the axial direction. A plurality of lock engaging portions including a plurality of locking protrusions arranged adjacent to each other,
Among the plurality of lock engaging portions, the plurality of lock engaging portions are respectively arranged on the inner peripheral surface for locking so as to extend in the axial direction between the lock engaging portions adjacent to each other in the rotational direction, and the plurality of lock engaging portions are viewed from the axial direction. A plurality of lock recesses each having a shape recessed outward in the radial direction with respect to the lock engaging portion of the
Have,
When viewed from the axial direction, the plurality of insertion engaging portions of the one spindle match the plurality of lock recesses of the lock member, and the plurality of insertion recesses of the one spindle are the plurality of insertion recesses of the lock member. In an insertable state in which the plurality of insertion engagement portions are in a state of matching the lock engagement portions of the above, the other spindle is moved to a specific position where the plurality of insertion engagement portions face each of the plurality of lock engagement portions in the rotation direction. The insertion portion of the spindle can be received into the internal space along the axial direction, and the plurality of locking protrusions of the plurality of lock engaging portions of the lock member are adjacent to each other in the axial direction. In the space between the locking protrusions, the plurality of engaging protrusions adjacent to each other in the axial direction of the plurality of insertion engaging portions of the one spindle are each received along the rotation direction, and the plurality of engaging protrusions and the plurality of engaging protrusions are received. By rotating the lock member to the engaging position where they are engaged with each other, the upper holding portion of the upper spindle and the lower holding portion of the lower spindle can be relatively positioned in the axial direction. With respect to the plurality of insertion engaging portions and the plurality of insertion recesses, the dimensions of the plurality of lock engaging portions and the plurality of lock recesses in the radial direction and the circumferential direction around the rotation center axis are set, respectively. And
The lock driving unit is a tire testing machine capable of rotating the lock member around the rotation center axis between the specific position and the engaging position. The other spindle has a cylindrical spindle outer peripheral surface that constitutes the outer peripheral surface of the other spindle, and the other spindle has a ring-shaped accommodation space that communicates with the internal space and accommodates the lock member. And a communication space that communicates the accommodation space and the outer peripheral surface of the spindle in the radial direction, respectively.
The lock drive unit
A drive source arranged on the radial outer side of the other spindle and generating a driving force,
A claim comprising a transmission mechanism capable of transmitting the driving force of the driving source to the locking member through the communicating space so that the locking member is rotated about the rotation center axis by the driving force of the driving source. Item 1. The tire testing machine according to Item 1. The transmission mechanism
A ring-shaped rotary gear arranged concentrically with the lock member on the radial outer side of the communication space and supported on the outer peripheral surface of the spindle of the other spindle so as to be rotatable around the center axis of rotation. A rotary gear and a rotary gear in which a plurality of first gear teeth are formed on the outer peripheral portion of the rotary gear.
At least one connecting member that is inserted into the communication space and connects the rotating gear and the locking member to each other in the radial direction so that the rotating gear and the locking member can rotate integrally around the rotation center axis. When,
The driving force is applied so that the rotating gear can be brought into contact with and separated from the plurality of first gear teeth of the rotating gear, and the rotating gear can be rotated around the rotation center axis by the driving force of the driving source. A rotation transmission unit that transmits to the rotation gear and
The tire testing machine according to claim 2. The rotation transmission unit
A rack comprising a plurality of second gear teeth arranged adjacent to each other along a horizontal direction and capable of engaging with the plurality of first gear teeth of the rotary gear.
The rack is orthogonal to the rotary center axis with respect to the rotary gear so that the engagement and disengagement of the plurality of first gear teeth and the plurality of second gear teeth can be switched. A contact / separation drive unit that can be connected / separated along the direction,
Have,
The tire test according to claim 3, wherein the drive source can reciprocate the rack along the one direction while the first gear and the second gear are engaged with each other. Machine. In the insertable state, the distance between the upper rim held by the upper holding portion and the lower rim held by the lower holding portion is set to a predetermined distance set according to the width of the tire. Further, an insertion drive unit capable of relatively inserting the insertion portion of the one spindle to the specific position in the internal space of the other spindle is provided.
The lock driving unit includes the plurality of engaging projections of the plurality of insertion engaging portions and the plurality of locking projections of the plurality of lock engaging portions in a state where the insertion portion is arranged at the specific position. The tire testing machine according to any one of claims 1 to 4, wherein the lock member is rotated relative to the one spindle around the rotation center axis so that the lock members are engaged with each other. A rotation detection unit capable of detecting that a specific portion of the one spindle has reached a specific rotation position set in advance around the rotation center axis, and a rotation detection unit.
When the rotation detection unit detects that the specific portion has reached the specific rotation position, the rotation blocking unit capable of blocking the rotation of one of the spindles and the rotation blocking unit.
Further prepare
The insertion drive unit inserts the insertion portion of the one spindle relatively to the specific position in the internal space of the other spindle in a state where the rotation of the one spindle is blocked by the rotation blocking portion. It is possible to
The lock drive unit is in a state where the rotation of the one spindle is blocked by the rotation blocking unit and the insertion portion of the one spindle is inserted to the specific position in the internal space of the other spindle. Rotating the lock member around the rotation center axis so that the plurality of engaging protrusions of the plurality of insertion engaging portions and the plurality of locking protrusions of the plurality of lock engaging portions engage with each other. The tire testing machine according to claim 5, wherein the tire testing machine can be used. A rotation detection unit capable of detecting a rotation position around the rotation center axis of a specific portion of the one spindle, and a rotation detection unit.
A rotation blocking unit capable of blocking the rotation of the one spindle, and a rotation blocking portion.
With the rotation of the first spindle blocked by the rotation blocking portion, the plurality of insertion engaging portions of the one spindle are fitted into the plurality of locking recesses of the other spindle when viewed from the axial direction. In addition, the other spindle is centered on the rotation according to the detection result of the rotation detection unit so that the plurality of insertion recesses of the one spindle match the plurality of lock engagement portions of the other spindle. A rotary drive unit that can be rotated around the axis,
The tire testing machine according to claim 5, further comprising. In the insertion drive unit, the rotation of the first spindle is blocked by the rotation blocking portion, the plurality of insertion engaging portions are matched with the plurality of lock recesses, and the plurality of insertion recesses are locked with the plurality of lock recesses. It is possible to relatively insert the insertion portion of the one spindle to the specific position in the internal space of the other spindle in a state of matching each portion.
The lock drive unit has the plurality of insertion engagement portions of the plurality of insertion engagement portions in a state where the rotation of the first spindle is blocked by the rotation blocking portion and the insertion portion is inserted to the specific position in the internal space. 7. The seventh aspect of claim 7, wherein the lock member can be rotated about the central axis of rotation so that the engaging projections and the plurality of locking projections of the plurality of lock engaging portions engage with each other. Tire testing machine. The plurality of engaging protrusions of the plurality of insertion engaging portions have a spiral shape centered on the rotation center axis so as to incline in one direction in the axial direction as the rotation direction progresses.
The plurality of locking protrusions of the plurality of lock engaging portions have a spiral shape centered on the rotation center axis so as to incline in the one direction as the rotation direction progresses, and are along the rotation direction. The tire testing machine according to any one of claims 1 to 8, which has a spiral shape capable of engaging with the plurality of engaging protrusions.

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