JP4788710B2 - Multi-axis fastening device - Google Patents

Description

  The present invention relates to a multi-axis tightening device that simultaneously tightens a plurality of fastening members.

  When parts are integrated with each other by a plurality of fastening members (for example, bolts), an operation of simultaneously fastening the plurality of fastening members by a multi-axis fastening device is often performed. In Patent Document 1, a plurality of sockets having different sizes are prepared in response to the bolt heads having different diameters, and each socket can be moved in a direction perpendicular to the bolt fastening direction. Then, only the socket corresponding to the size of the bolt to be fastened this time is selectively advanced to a predetermined tightening position, and the plurality of sockets in the tightening position are simultaneously driven to rotate by the plurality of nut runners. What has been proposed is proposed.

JP-A-11-19833

  By the way, the arrangement relationship of the plurality of fastening members may be different from each other. For example, in a wheel support member of an automobile, when a hub member is fixed to a main body member with a plurality of bolts, the arrangement relationship of the plurality of bolts is often different depending on the vehicle type. In some cases, a plurality of types of wheel support members may flow on the same assembly line for a plurality of vehicle types. In this case, a plurality of types of wheel supports in which the arrangement of the plurality of fastening members is different by one multi-axis fastening device. It would be desirable to accommodate the member. As described above, when the arrangement of the plurality of fastening members is different, the fastening position is not constant, and the one described in Patent Document 1 cannot be used.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a multi-axis fastening device that can cope with a case where the arrangement of a plurality of fastening members is different.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1 in the claims,
In a multi-axis tightening device that simultaneously tightens a plurality of fastening members with nut runners through sockets,
A plurality of socket support members that hold the plurality of sockets in different arrangements in correspondence with the difference in arrangement of the plurality of fastening members,
An indexing device for indexing any one of the socket support members to a predetermined tightening position;
A nut runner holding member that holds the plurality of nut runners movably in a direction orthogonal to the tightening direction, and is reciprocated in the tightening direction;
The tightening of the nut runner and the socket is provided in one of the nut runner and the socket, and when the nut runner and the socket are connected, the nut runner is displaced in a direction perpendicular to the tightening direction. A guide member that corrects misalignment in a direction orthogonal to the direction;
It is supposed to be equipped with.

  According to the above solution, one specific socket support member having a socket arrangement corresponding to the arrangement of the plurality of fastening members to be tightened at this time is indexed to the tightening position among the plurality of socket support members. . Thereafter, when the plurality of nut runners are brought close to each other to be connected to the plurality of sockets at the index position, the plurality of nut runners correspond to the arrangement of the plurality of sockets at the index position by the guide function of the guide member. The nut runner is connected to each of the plurality of sockets in the tightening position by being displaced in a direction orthogonal to the tightening direction. After this connection, the plurality of fastening members are simultaneously tightened by the nut runners via the sockets.

A preferred mode based on the above solution is as described in claim 2 and the following claims. That is,
The socket is configured by combining a plurality of divided sockets divided in the axial direction,
Of the plurality of divided sockets, a proximal-side divided socket connected to the nutrunner is biased so as to be relatively displaceable in the axial direction with respect to the other divided sockets and to be separated in the axial direction,
When the base end side split socket is displaced so as to approach the other split socket, the base end side split socket is brought into contact with the socket support member to give rotational resistance to the base end side split socket. A contact portion is formed,
(Corresponding to claim 2). In this case, in a state where the base end side socket is pressed from the base end side by the nut runner, the base end side split socket is subjected to rotational resistance by contacting the socket support member, and the nut runner and the socket are securely connected. This prevents a state where the socket is rotated or idled by the nut runner in a state where the nut runner is not connected, and is preferable for securely connecting the nut runner and the socket.

The indexing device has a rotating body that is rotationally driven,
The plurality of socket support members are held on the rotating body at intervals in the circumferential direction of the rotating body,
By changing the rotational position of the rotating body, the plurality of socket support members are selectively positioned at the tightening position.
(Corresponding to claim 3). In this case, an arbitrary socket support member among the plurality of socket support members can be positioned at the index position by a simple method of changing the rotation position of the rotating body.

The tightening direction is set to be the vertical direction,
The plurality of socket support members can be displaced in the vertical direction with respect to the rotating body,
A restriction support member for restricting the socket support member from dropping at a position other than the indexing position is provided on the rotating body,
The nut runner holding member is provided with a suspension means for restricting the one socket support member at the indexing position from dropping.
(Corresponding to claim 4). In this case, with a simple configuration, one socket support member at the indexing position is lowered for tightening while holding the other socket support member at a position other than the indexing position at a predetermined height position. It can be transferred to the nut runner and lowered toward the fastening member together with the nut runner.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where arrangement | positioning of a some fastening member differs, the multi-axis fastening apparatus which can perform the simultaneous fastening of a some fastening member can be provided.

  In FIG. 1, reference numeral 1 denotes a base fixed to the floor surface, and a nutrunner holding member 10 is held on the base 1 through a slider 3 so as to be slidable in the vertical direction. Then, the nut runner holding member 110 is driven up and down in the vertical direction by, for example, the cylinder device 4 as the up and down drive device. In FIG. 1, the cylinder device 4 is drawn small symbolically. In the embodiment, the vertical direction is a tightening direction described later.

  The nut runner holding member 10 holds a plurality of (four in the embodiment) nut runners 20. In the embodiment, each nut runner 20 includes a rotary drive unit 20A having a built-in motor, a speed reducer 20B that receives an input from the rotary drive unit 20A, and a vertically extending drive integrated with an output shaft of the speed reducer 20B. It is comprised from the axis | shaft 20C. Each nut runner 20 can be displaced by a predetermined range in a direction orthogonal to the paper surface of FIG. That is, when the tightening direction that is the vertical direction is the Z-axis direction, the nut runner 20 can be displaced in the X-axis direction and the Y-axis direction.

  A mechanism for individually displacing each nut runner 20 in a direction orthogonal to the tightening direction (vertical direction in FIG. 1) will be described by focusing on one nut runner 20. First, the first bracket 21 is fixed to the nut runner holding member 10, and the second bracket 22 is held with respect to the first bracket 21 so as to be displaceable in a direction perpendicular to the plane of FIG. 1 via the first guide mechanism 23. Has been. The first guide mechanism 23 includes a guide rod 23a that is held by the first bracket 21 and extends in a direction perpendicular to the plane of FIG. 1 and a guide cylinder 23b that is held by the second bracket and through which the guide rod 23a penetrates slidably. Have.

A third bracket 25 is held to the second bracket 22 so as to be displaceable in the left-right direction in FIG.
The second guide mechanism 24 includes a guide rod 24a that is held by the third bracket 25 and extends in the left-right direction in FIG. 1, and a guide cylinder 24b that is held by the second bracket and through which the guide rod 24a passes slidably. . The reduction gear 20 </ b> B of the nut runner 20 is fixed to the third bracket 25.

  The brackets 21, 22, 25 and the guide mechanisms 23, 24 as described above are provided independently for each nut runner 20, and each nut runner 20 is perpendicular to the vertical direction independently of the other nut runners 20. Can be displaced

  On the other hand, an indexing device 30 is disposed below the nut runner holding member 10. The indexing device 30 includes a pair of upper and lower support members 31 that are fixed members integrated with the base 1, and a rotation holding member 32 as a rotating body that is rotatably held between the pair of upper and lower support members 1. And have. The rotation holding member 32 holds a plurality (three in the embodiment) of socket support members 40 at intervals in the circumferential direction. That is, the rotation holding member 32 has a hexagonal outer shape in plan view, and the socket support members 40 are held on the three surfaces one by one. In the following description, when the socket support members 40 are distinguished from each other, they are distinguished by adding a sign of A, B or C to the sign of 40, and when there is no need to distinguish, only the sign 40 is used. (In FIG. 2, 40A, 40B, and 40C are distinguished from each other).

  A rotation shaft 32a of the rotation holding member 32 is connected to a motor 47 (output shaft thereof) as a rotation drive means via gears 45 and 46 (see FIG. 3). Thereby, the rotation holding member 32 is rotated by driving the motor 47 to rotate. That is, by the rotation control of the motor 47, the rotation holding member 32 is driven to rotate and stopped at a predetermined rotation position, and any of the plurality of socket support members 40 (40A, 40B, 40C) is arbitrarily selected. The one socket support member 40 can be positioned (indexed) at a predetermined tightening position to be described later.

  Each socket support member 40 (40A, 40B, 40C) holds a plurality (four in the embodiment) of sockets 50, respectively. The arrangement of the plurality of sockets 50 held by one socket support member 40 is set to be different from the arrangement of the plurality of sockets 50 held by the other socket support member 40. Of course, the difference in the arrangement of the plurality of sockets 50 between the socket support members 40 corresponds to the difference in the arrangement relationship of a plurality of fastening members (bolts in the embodiment) described later. In the embodiment, the sizes of the plurality of fastening members (the outer diameters of the bolt heads in the embodiment) are also different. Therefore, the sizes of the plurality of sockets 40 in one socket support member 40 (to the fastening members). The size of the engaging portion is also different from the size of the plurality of sockets 40 in the other socket support members 40.

  Each socket support member 40 can be displaced vertically with respect to the rotation holding member 32 via a slide mechanism 41 (see FIGS. 2 and 4). In order to prevent the socket support member 40 from falling, an annular regulating member 33 having an outer diameter that is circular is integrated with the lower surface of the upper support member 31 that holds the rotation holding member 32. On the other hand, the connecting rod 34 integrally extends upward from each striker support member 40, and the hook portion 35 formed on the upper end portion of the connecting rod 34 is engaged with the regulating member 33 from the outer peripheral side. Combined (suspending support).

  The restriction member 33 is formed with a notch 33a at a predetermined tightening position that is a predetermined position in the circumferential direction (see FIG. 2). That is, when each socket support member 40 is located in the notch 33a, which is a predetermined tightening position, the hook 35 is released from the restriction by the restriction member 33 and can be displaced downward. It is said. On the other hand, the socket support member 40 in which the hook portion 35 is located at a position other than the notch portion 33a is held at a predetermined height position by the regulating member 33.

  Corresponding to the notch 33 a (that is, the tightening position), the nut runner holding member 10 described above holds the holding rod 11 extending downward, and the holding portion 12 is formed at the lower end of the holding rod 11. Has been. The holding portion 12 is set so as to be located immediately below the hook portion 35 of the socket support member 40 located in the notch portion 33a. As a result, as the holding portion 12 (the nut runner holding member 10) is lowered, the hook portion 35 in the socket support member 40 can be displaced downward from the position of the notch portion 33a. That is, the socket support member 40 in the tightening position is lowered as the nut runner holding member 10 is lowered.

  A guide member 60 having a trumpet shape downward is held at the lower end of each nut runner 20. That is, the nut runner holding member 10 is integrated with a holding cylinder 15 that rotatably holds the drive shaft 20 </ b> C of the nut runner 20, and the guide member 60 is held at the lower end of the holding cylinder 15. A connecting recess 61 having an irregular cross section is formed on the lower end surface of the drive shaft 20C, and a connecting convex portion 62 having an irregular cross section formed on the upper end of the socket 50 is fitted into the connecting recess 61. The drive shaft 20C and the socket 50 are rotated integrally.

  The inner surface of the guide member 60 is tapered, and the opening diameter is gradually increased toward the lower side. The maximum opening diameter (inner diameter) is a size of a difference in arrangement positions of a plurality of fastening members described later. It is a combined setting. More specifically, the maximum dimensional difference (maximum dimensional difference in the direction orthogonal to the tightening direction) in which the arrangement of the plurality of fastening members between the multiple types of workpieces in the direction orthogonal to the tightening direction is, for example, 35 mm In this case, the maximum inner diameter of the guide member 60 may be set to 35 mm or more (in the embodiment, the maximum inner diameter of the guide member 60 is set to 58 mm in consideration of a margin dimension). In FIG. 5, reference numerals 16 and 17 denote bearings, and the guide member 60 is cut so as not to be integrated with the drive shaft 20C. However, the guide member 60 may be set to rotate integrally with the drive shaft 20C. it can.

  When the nut runner 20 is lowered in an eccentric state with the socket 50, the connecting concave portion 61 approaches the connecting convex portion 62 of the socket 50, and the connecting convex portion 62 (the upper end surface thereof) eventually becomes the guide member 60. It will contact | abut to the inner surface of. When the nut runner 20 is further lowered from this state, the nut runner 20 is displaced in a direction perpendicular to the tightening direction, and the connecting projection 62 approaches the connecting recess 61 while contacting the inner surface of the guide member 60. Then, it will eventually be fitted into the connecting recess 61 (completion of connection).

  In order to ensure the fitting between the connecting concave portion 61 and the connecting convex portion 62, and in particular to facilitate the centering of the connecting concave portion 61, a spherical concave portion 61a is formed at the opening end of the connecting concave portion 61, A spherical convex portion 62 a corresponding to the spherical concave portion 61 a is formed at the upper end portion of the connecting convex portion 62. The spherical concave portion 61a is formed so as to constitute a part of a spherical surface centered on the axis of the drive shaft 20C, and the spherical convex portion 62a constitutes a part of a spherical surface centered on the axis of the socket 50. Is formed. Thereby, at the beginning of fitting of the connecting concave portion 61 and the connecting convex portion 62, the fitting is smoothly started while the axial alignment is performed by contact between the spherical surfaces, and thereafter, the fitting of the cross-sectionally different shapes is easy. Will be done.

  Next, a preferred configuration example of the socket 50 will be described with reference to FIG. First, the socket 50 has a pair of upper and lower holding cylinders 70, 71 arranged concentrically and integrated with the socket support member 40. A rotating shaft 80 is rotatably held by the holding cylinders 70 and 71. The rotating shaft 80 has a plurality of (in the embodiment, five) divided structures in the vertical direction. That is, the rotating shaft 80 is divided into a first divided socket 81, a second divided socket 82, a third divided socket 83, a fourth divided socket 84, and a fifth divided socket 85 sequentially from the top to the bottom. Yes. The lower part of the fourth split socket 84 extends downward from the lower holding cylinder 71, and the lower end of the fourth split socket 84 is connected to the lower end of the fourth split socket 84 by the connecting pin 86. A fifth divided socket 85 connected (engaged) with a fastening member such as a bolt is detachably attached. In other words, the setting is such that the fifth divided socket 85, which is a consumable item, can be easily replaced.

  The upper end portion of the fourth divided socket 84 is fitted in the holding cylinder 71 so as to be slidable in the vertical direction, and a downward displacement of a predetermined amount or more is formed with a collar portion 84 a on the inner surface of the holding cylinder 71. It is regulated by coming into contact with the locking step 71a from above. A guide hole 84b that opens upward is formed at the upper end portion of the fourth divided socket 84, and the lower end portion of the third divided socket 83 is slidable in the vertical direction and does not rotate relative to the guide hole 84b. (Fitting with an irregular cross-section). Both split sockets 84 and 83 are urged by a spring 87 in a direction away from each other in the axial direction.

  The second divided socket 82 has a cylindrical shape, and is integrated with each other by a connecting pin 88 in a state where the upper end portion of the third divided socket 83 is fitted in the second divided socket 82. A lower end portion of the first divided socket 81 is fitted to the second divided socket 82 so as to be slidable in the vertical direction. A guide pin 89 is integrally held in the first divided socket 81, and a guide hole 82a in which the guide pin 89 is slidably fitted is formed in the second divided socket 82. Thus, the first divided socket 81 can be displaced relative to the second divided socket 82 in the axial direction relative to the length of the guide hole 82a while rotating integrally. The first divided socket 81 and the second divided socket 82 are urged by a spring 90 in a direction away from each other in the axial direction. The urging force of the spring 90 is set to be smaller than the urging force of the spring 87.

  The first divided socket 81 extends upward from the upper holding cylinder 70, and the above-described connecting convex portion 62 is formed at the upper end portion thereof. The first divided socket 81 is formed with a collar portion 81 a as a contact portion at a position higher than the holding cylinder 70. A friction material 91 (for example, urethane) having a large friction coefficient is integrated on the upper end surface of the holding cylinder 70 by baking, a fixture, or the like. Thereby, when the 1st division | segmentation socket 81 is pressed below and the collar part 81a contacts with the friction material 91, the rotational resistance of the 1st division | segmentation socket 81 will be increased.

  7 and 8 show an example of a workpiece having a plurality of fastening members that are tightened by the multi-axis fastening device according to the present invention. In the embodiment, the workpiece is a wheel support member W. The wheel support member W includes a main body member 100 integrated with a suspension link extending in the front-rear direction, and a hub member 101 integrated with the main body member 100. The hub member 101 includes an outer member 101A and an inner member 101B. The outer member 101A is fixed to the main body member 100 by four bolts 110A to 110D serving as a plurality of fastening members. Further, the inner member 101B is rotatable with respect to the outer member 101A via the bearing 120, and a wheel (not shown) is attached to the inner member 101B.

  The four bolts 110 </ b> A to 110 </ b> D shown in FIG. 7 serve as a plurality of fastening members that are simultaneously tightened by the multi-axis tightening device described above. If the vehicle types are different, the arrangement relationship of the four bolts 110A to 110D is different, and the diameter (the outer diameter of the bolt head) is also different. FIG. 1 shows a state in which a wheel support member W as a work is conveyed below the tightening position simply by a one-dot chain line. Of course, the wheel support member W to be conveyed is temporarily stopped at the fastening station located below the socket support member 40 in the fastening position until the fastening of the bolts 110A to 110D is completed.

  In the embodiment, there are three types of wheel support members W, that is, the types of wheel support members W that are different in the arrangement of the bolts 110A to 110D, etc., from the first to third types (W1, W2, W3). Correspondingly, the first to third types (40A, 40B, 40C) of the socket support member 40 held by the rotation holding member 32 are also set as described above. That is, the first socket support member 40A is used for the first wheel support member W1, the second socket support member 40B is used for the second wheel support member W2, and the third wheel. The third socket support member 40C is used for the support member W3. In order to change the socket support member 40 to be used according to such a difference in the wheel support member W, the socket support member 40 corresponding to the wheel support member W in the transfer station is changed by changing the rotation position of the rotation holding member 32. It will be indexed to a predetermined tightening position.

  Assuming now that the first wheel support member W is positioned at the transfer station, at this time, the rotation holding member 32 is rotated to support the first socket corresponding to the first wheel support member W1. The member 40A is indexed to the tightening position (the hook portion 35 of the first socket support member 40 is positioned at the notch portion 33a of the regulating member 33). In a state where the hooking portion 35 is located in the notch 33a, the first socket support member 40A is held by the holding portion 12 provided in the nut runner holding member 10, and the first socket support member 40A is carelessly moved downward. Displacement is regulated.

  Thereafter, when the nut runner holding member 10 is lowered by the cylinder device 4 while the nut runner 20 is driven to rotate, the guide member 60 receives a guide action (in a direction perpendicular to the vertical direction as the tightening direction). Soon, the connection recess 61 of each nut runner 20 is connected (fitted) to the connection protrusion 62 of each socket 40. Thereby, the arrangement state of each nut runner 20 will be in the state corresponding to the arrangement state of the bolts 110A to 110D in the first wheel support member W1 to be tightened this time. In particular, in a state immediately before the coupling convex portion 62 is fitted to the coupling concave portion 61, the first divided socket 81 is lowered with respect to the second divided socket 82, and the collar portion 81 a becomes the friction material 91. Since the contact resistance increases the rotational resistance of the first split socket 81, the nut runner 20 and the first split socket 81 have a rotational difference (restriction of rotation in a state where they are not completely connected). The connection convex portion 62 is reliably fitted to the connection concave portion 61. Moreover, since the spherical recessed part 61a and the spherical convex part 62a are initially fitted, the connection concave part 61 and the connecting convex part 62 are smoothly fitted.

  When the nut runner holding member 10 is further lowered, the lower end portion of each socket 50 (the fifth divided socket 85) is brought into contact with and engaged with each of the bolts 110A to 110D. Since this engagement is performed while applying the compression action of the spring 87 (the third divided socket 83 is relatively displaced downward with respect to the fourth divided socket 84), the socket 50 and the bolts 110A to 110D are completely connected. It is possible to prevent the situation in which the socket 50 is idle in a state where it is not engaged. After the socket 50 is completely engaged with the bolts 110A to 110D, the rotational driving force, that is, the tightening force of each nut runner 20 is transmitted to the respective bolts 110A to 110D through the socket 20, respectively. 110D tightening is performed simultaneously.

  When the tightening of the bolts 110A to 110D is completed, the nut runner holding member 10 is raised, and another wheel support member W to be tightened next is newly conveyed to the tightening station. If the wheel support member W transported next to the transport station is the same type as the previous wheel support member W1, the nut runner holding member 10 once raised is lowered as it is, and the socket support member 40A used last time is removed. The bolts 110A to 110D may be tightened as they are.

  If the wheel support member W transported next to the transport station is different from the previous wheel support member W1, the socket support member 40A needs to be changed to another socket support member 40. When changing the socket support member 40, first, the nut runner holding member 10 is raised, and the hook portion 35 in the first socket support member 40 </ b> A used last time is positioned in the notch 33 a of the restriction member 33. Thereafter, the rotation holding member 32 is rotated, and the socket support member 40 (to be 40B or 40C) corresponding to the wheel support member W to be subjected to the next tightening operation is indexed to the tightening position. Thereafter, the nut runner holding member 10 is lowered in the same procedure as described above, and the bolts 110A to 110D in the next wheel support member W in the transfer station are tightened.

  Since the fifth divided socket 85 is particularly a consumable item, it is appropriately replaced. Further, since the first split socket 81 also has a high degree of wear, it is replaced as appropriate by pulling it out from above.

  Although the embodiment has been described above, the present invention is not limited to the embodiment, and can be appropriately changed within the scope described in the scope of claims. For example, the invention includes the following cases. . The tightening direction is not limited to the vertical direction, and can be set to an appropriate direction such as a horizontal direction (horizontal direction). While the socket support member 40 is set so as not to be displaced with respect to the rotation holding member 32, the rotation holding member 32 itself is displaced in the tightening direction, or the rotation holding member 32 is not displaced in the tightening direction. May be displaced in the direction of approaching the socket 40. The nut runner holding member 10 may be set not to be displaced in the tightening direction (in this case, for example, the rotation holding member 32 and the workpiece are set to be displaced in the tightening direction).

  The number of nut runners 20 (that is, the number of fastening members to be tightened simultaneously) may be 2, 3 or 5 or more. The number of fastening members used for the plurality of types of workpieces may be different from each other. In this case, the number of sockets 50 held by each socket support member 40 is the number of fastening members in the workpiece to be tightened. What is necessary is just to set so that it may mutually differ so that it may become a number according to, and the nut runner should just prepare according to the maximum number of fastening members. The sizes of the fastening members (for example, bolts 50) may all be the same. In this case, the size of the socket 50 does not need to be different among the socket support members 40. The workpiece in which a plurality of fastening members are used is not limited to the wheel support member, and may be other parts for automobiles or parts other than automobile parts.

  The guide member 60 may be provided on the socket 50 side. However, it is preferable to provide the nut runner side in order to reduce the total number of guide members 60. The rotary shaft 80 of the socket 50 may not be divided, but the tip end portion (corresponding to the fifth divided socket 85) engaged with the fastening member is appropriately replaced as a separate part from other portions. It is preferable to be able to do so. The connection recess 61 may be formed on the socket 50 side, while the connection protrusion 62 may be formed on the nut runner 20 side. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

1 is an overall side view showing an embodiment of the present invention. The index apparatus is shown, Comprising: The X2-X2 line | wire equivalent sectional drawing of FIG. The side view which shows the rotation drive part of a rotation holding member, and abbreviate | omits a socket support member. The side view which shows the relationship between a rotation holding member, a socket support member, a control member, etc., and abbreviate | omits some socket support members. The principal part expanded sectional view which shows the detail of a guide member part. Sectional drawing which shows an example of the socket made into the division structure. The side view which shows an example of the workpiece | work in which fastening is performed using a some fastening member. X8-X8 line equivalent sectional drawing of FIG.

Explanation of symbols

4: Cylinder device (for lifting and lowering the nutrunner holding member)
12: Holding part (for holding the socket support member)
20: Nutrunner 20A: Rotation drive unit 20B: Reducer 20C: Drive shaft 21: First bracket 22: Second bracket 23: First guide mechanism 24: Second guide mechanism 25: Third bracket 30-splitting device 31: Support Member 32: Rotation holding member (rotating body)
33: Restricting member 33a: Notch (tightening position)
35: Hook (for engagement with the regulating member)
40: Socket support member 41: Slide mechanism 50: Socket 60: Guide member 61: Connection recess 61a: Spherical recess 62: Connection protrusion 62a: Spherical protrusion 80: Rotating shaft (socket)
81: First divided socket 81a: Collar portion (contact portion)
82: Second divided socket 82a: Guide hole 83: Third divided socket 84: Fourth divided socket 85: Fifth divided socket 91: Friction material 100: Body member 101: Hub member 101A: Outer member 101B: Inner member 110A- 110D: Bolt (fastening member)
W: Wheel support member (work having a plurality of bolts to be tightened)

Claims (4)

In a multi-axis tightening device that simultaneously tightens a plurality of fastening members with nut runners through sockets,
A plurality of socket support members that hold the plurality of sockets in different arrangements in correspondence with the difference in arrangement of the plurality of fastening members,
An indexing device for indexing any one of the socket support members to a predetermined tightening position;
A nut runner holding member that holds the plurality of nut runners movably in a direction orthogonal to the tightening direction, and is reciprocated in the tightening direction;
The tightening of the nut runner and the socket is provided in one of the nut runner and the socket, and when the nut runner and the socket are connected, the nut runner is displaced in a direction perpendicular to the tightening direction. A guide member that corrects misalignment in a direction orthogonal to the direction;
A multi-axis fastening device comprising: In claim 1,
The socket is configured by combining a plurality of divided sockets divided in the axial direction,
Of the plurality of divided sockets, a proximal-side divided socket connected to the nutrunner is biased so as to be relatively displaceable in the axial direction with respect to the other divided sockets and to be separated in the axial direction,
When the base end side split socket is displaced so as to approach the other split socket, the base end side split socket is brought into contact with the socket support member to give rotational resistance to the base end side split socket. A contact portion is formed,
A multi-axis fastening device characterized by that. In claim 1,
The indexing device has a rotating body that is rotationally driven,
The plurality of socket support members are held on the rotating body at intervals in the circumferential direction of the rotating body,
By changing the rotational position of the rotating body, the plurality of socket support members are selectively positioned at the tightening position.
A multi-axis fastening device characterized by that. In claim 3,
The tightening direction is set to be the vertical direction,
The plurality of socket support members can be displaced in the vertical direction with respect to the rotating body,
A restriction support member for restricting the socket support member from dropping at a position other than the indexing position is provided on the rotating body,
The nut runner holding member is provided with a suspension means for restricting the one socket support member at the indexing position from dropping.
A multi-axis fastening device characterized by that.

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