JP2019081235A - Retrofittable connector - Google Patents

Abstract

To provide a retrofittable connector of a new structure, by which wiring that prevents blocking of a torsion movement between robot arm links can be realized by a structure that can be retrofitted.SOLUTION: First and second exterior members 16, 18 are mutually fitted in an axial direction such that respective openings of grooves 20, 44 face each other. The first and second exterior members 16, 18 are permitted to circumferentially rotate relative to each other. An accommodating space 62 extending in a circumferential direction is formed by the grooves 20, 44. A connection wire 14 extending between a first connection part 64 of the first exterior member 16 and a second connection part 66 of the second exterior member 18 is accommodated in the accommodating space 62. Meanwhile, insertion parts for fitting are respectively configured in dividing portions 22b, 46b dividing the first and second exterior members 16, 18 in a circumferential direction. The first and second exterior members 16, 18 can be externally fitted on first and second fitting targets 70, 72 rotatable relative to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a retrofit connector which can be retrofitted with wiring extending between links of a robot arm which is permitted relative twist displacement.

  Conventionally, a robot arm has a structure in which a plurality of links are connected by joints, and relative displacement of the plurality of links is allowed. The joints of the robot arm include not only those which allow relative tilting of the links but also torsion joints which allow relative torsional displacement of the links.

  By the way, for example, a wire connected to an end effector provided at the distal end of the robot arm may extend from the proximal end side of the robot arm and be disposed across the joint. In this case, it is necessary that the wire is pulled excessively when driving the joint portion and the wire is broken or the movement of the robot arm in the joint portion such as bending and stretching or twisting is not inhibited by the wire.

  Therefore, Japanese Patent Laid-Open No. 2015-54357 (Patent Document 1) proposes a joint driving device in which a striatum such as a wire is folded in a U-shape and disposed at a joint that connects the link so as to allow relative displacement. In particular, in the torsion joint, it is possible to arrange the striatum while allowing relative torsion displacement of the link.

  However, since patent document 1 incorporates a striated body in the joint drive device of a robot, it was difficult to apply later to the existing robot provided with the joint drive device beforehand. Therefore, in the case of providing a new wiring across joints for the purpose of adding functions to an existing robot, a significant design change of the robot itself is required, and the structure of Patent Document 1 is adopted. It was difficult to do this, and a new structure that could easily be applied to existing robots was required.

JP, 2015-54357, A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that even if straddling between links of relatively rotatable robot arms, etc. are disposed, the twisting operation of the links is prevented. An object of the present invention is to provide a retrofit connector having a novel structure, which can be realized by a structure which can be retrofitted to an existing robot arm or the like.

  The following describes aspects of the present invention made to solve such problems. In addition, the component employ | adopted in each aspect described below can be employ | adopted as much as possible in arbitrary combination.

  That is, according to the first aspect of the present invention, there is provided an annular first exterior member mounted in an extrapolated state on each of the first mounting target and the second mounting target allowed to undergo relative torsional displacement. An annular second exterior member is provided, and a groove extending in the axial direction of the first exterior member and the second exterior member and extending in the circumferential direction is respectively formed, and an axis of the recess is formed. The first exterior member and the second exterior member are combined with each other in the axial direction such that the directional openings face each other, and the first exterior member and the second exterior member are circumferentially relative to each other. A housing space which is allowed to rotate and extends in the circumferential direction between the first exterior member and the second exterior member is formed by the recessed groove and provided in the first exterior member. A connection arrangement extending between a first connection and a second connection provided on the second exterior member Is accommodated in the accommodation space, and the first exterior member and the second exterior member are circumferentially divided at least in part in the circumferential direction, and the first exterior member and the second exterior member are separated. The attachment target insertion portion is configured in the divided portion of the exterior member, and the first exterior member and the second exterior member are extrapolated to one of the first attachment target and the second attachment target. It is characterized in that it is possible to wear in a state.

  According to such a retrofit connector having a structure according to the first aspect, the first exterior member is attached to the first attachment target in a state of extrapolation, and the second exterior member is attached to the second attachment target By extending in a state of extrapolation, extending between the first mounting target and the second mounting target while permitting relative torsional displacement between the first mounting target and the second mounting target Wiring can be provided.

  Moreover, since the first exterior member attached to the first attachment member and the second exterior member attached to the second attachment member are circumferentially divided at least in part in the circumferential direction, It is possible to insert the mounting target into the exterior member at the divided portions that constitute the mounting target insertion portion. Therefore, the first exterior member and the second exterior member can be easily retrofitted to the first attachment member and the second attachment member, and the first attachment member and the second attachment member can be used. Cross over wiring can be provided later.

  Furthermore, since the first exterior member and the second exterior member are respectively provided with the recessed grooves opened in the axial direction, the first exterior member and the second outer member are arranged such that the axial openings of the recessed grooves face each other. By combining the exterior members, a large accommodation space is formed between the first exterior member and the second exterior member, and the arrangement space of the connection wiring can be efficiently obtained.

  Furthermore, since each of the first exterior member and the second exterior member has an axial length capable of forming a recessed groove, the inner circumferential surface of the first exterior member and the second exterior member can be obtained. It is intended to improve the mounting strength by securing a large axial length and making the surfaces of the first exterior member and the second exterior member mounted on the first installation target and the second installation target large. Can.

  According to a second aspect of the present invention, in the post-mounted connector according to the first aspect, an outer peripheral wall portion of the recessed groove in the first exterior member and an outer peripheral wall of the recessed groove in the second exterior member The portion is provided with an axial direction connecting portion which connects the first exterior member and the second exterior member in the axial direction so as to be relatively rotatable in the circumferential direction.

  According to the second aspect, the first exterior member and the second exterior member are connected to each other by the axial connection portion, so that the first exterior member and the second exterior member can be handled integrally. As a result, storage, transportation, and the like can be facilitated, and the mounting operation to the first mounting target and the second mounting target can be simplified.

  According to a third aspect of the present invention, in the post-mounted connector described in the first or second aspect, at least one of the first exterior member and the second exterior member circumferentially divides the divided portion. The circumferential direction connection part connected to is provided.

  According to the third aspect, after inserting the mounting object into the exterior member through the dividing portion, it is possible to prevent detachment of the back-mounted connector from the mounting object by connecting and closing the dividing portions by the circumferential connection portion. .

  According to a fourth aspect of the present invention, in the post-attached connector according to any one of the first to third aspects, the connection wiring is folded in the circumferential direction at an intermediate portion in the accommodation space. is there.

  According to the fourth aspect, the circumferential position of the folded back portion in the connection wiring changes according to the relative torsional displacement between the first mounting object and the second mounting object, thereby forming the first mounting object Torsional displacement of the second mounting object can be permitted on both sides in the circumferential direction.

  According to a fifth aspect of the present invention, in the post-attached connector according to any one of the first to fourth aspects, the connection wiring is wound so as to extend in one circumferential direction in the accommodation space. It is a thing.

  According to the fifth aspect, relative torsional displacement between the first mounting object and the second mounting object is permitted in the simple wiring structure due to the tightening and loosening of the connection wiring.

  According to a sixth aspect of the present invention, in the post-attached connector according to any one of the first to fifth aspects, the width dimension in a direction perpendicular to the housing cavity is greater than the outer dimension of the connection wiring It is smaller than twice the outer dimension of the connection wiring.

  According to the sixth aspect, the sliding resistance between the connection wiring and the inner wall surface of the housing space is reduced, and the relative torsional displacement between the first mounting object and the second mounting object is allowed smoothly. At the same time, it is possible to prevent the connection wire from being tangled in the accommodation space even when the connection wire is folded back in the accommodation space or a plurality of connection wires are disposed in the accommodation space.

  According to a seventh aspect of the present invention, in the post-fit connector according to any one of the first to sixth aspects, relative rotation amounts of the first exterior member and the second exterior member in the circumferential direction are determined. A rotation limiting portion for limiting is provided.

  According to the seventh aspect, the relative amount of torsional displacement (relative rotation amount) of the first exterior member and the second exterior member is limited by the rotation limiting portion, whereby the first exterior member and the second exterior member are separated. Thus, the connection wiring can be prevented from being damaged due to excessive relative rotation of the exterior member, and reliability can be improved.

  The eighth aspect of the present invention is the post-fit connector according to any one of the first to seventh aspects, wherein the divided portion is at least one of the first exterior member and the second exterior member. While being provided in two places of the circumferential direction, any one of these division parts is connected by the hinge part.

  According to the eighth aspect, the exterior member provided with the hinge portion is not divided into two by the two divided portions, and the exterior member can be treated as one part. Further, in the exterior member having the hinge portion in one of the divided portions, the circumferential opening size of the other divided portion can be changed by the hinge portion, so that the circumferential opening size of the other divided portion is increased. It is possible to insert the mounting target into the exterior member through the divided portion of the second part, while the exterior member can be easily attached to the mounting target in the extrapolation state by reducing the circumferential opening dimension of the other divided portion. .

  The ninth aspect of the present invention is the post-fitting connector according to any one of the first to seventh aspects, wherein at least one of the first exterior member and the second exterior member is the divided portion. Are provided at two places in the circumferential direction and can be divided into two halves.

  According to a ninth aspect, at least one of the first exterior member and the second exterior member has a simple structure in which two halves independent of each other are combined, and these two halves are By being attached so as to sandwich the mounting target, the exterior member can be easily mounted in the extrapolation state to the mounting target.

  According to a tenth aspect of the present invention, in the post-mounted connector according to any one of the first to ninth aspects, the concave groove of the first exterior member and the second exterior member in the groove width direction A partition part is provided to divide into plural parts, and the accommodation spaces are respectively formed on both sides of the partition part, and the connection wiring is accommodated and arranged in the plurality of accommodation spaces, respectively. It is.

  According to the tenth aspect, in the case where a plurality of connection wires are provided in the retrofit connector, etc., the connection wires can be stored by arranging the plurality of connection wires in the respective storage spaces separated by the partition wall portion. It can prevent getting tangled in the office.

  According to the present invention, the first mounting object and the second mounting object which can be torsionally displaced by the mounting object being inserted into the first exterior member and the second exterior member through the divided portions constituting the mounting object insertion portion. The connection wiring which straddles the mounting object of can be easily provided later. Furthermore, since the first exterior member and the second exterior member are respectively provided with the concave grooves opened in the axial direction, it is possible to secure a large arrangement space of the connection wiring formed by facing the concave grooves. Can be obtained, and axial dimensions of the inner peripheral surfaces of the first exterior member and the second exterior member, which are mounting surfaces to the first mounting target and the second mounting target, can be increased, and the mounting strength can be obtained. Can also be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a retrofit connector as a first embodiment of the present invention. FIG. 2 is a front view of the retrofit connector shown in FIG. 1; FIG. 3 is a left side view of the post-mounted connector shown in FIG. 2; FIG. 3 is a bottom view of the post-mounted connector shown in FIG. 2; Sectional drawing which expands and shows the principal part of the retrofit connector of FIG. FIG. 2 is an exploded perspective view of the post-mounted connector shown in FIG. It is a perspective view of the case member which comprises the retrofit connector shown in FIG. 1, Comprising: The figure which shows the state which open | released the division part. FIG. 7 is a plan view showing a post-attached connector as a second embodiment of the present invention. FIG. 9 is a bottom view of the post-mounted connector shown in FIG. 8; XX sectional drawing of FIG. FIG. 9 is an exploded perspective view of the post-mounted connector shown in FIG. 8; The bottom view which expands and shows the principal part of the post-mounting connector of FIG. The top view which shows the post-fit connector as 3rd embodiment of this invention. FIG. 14 is a left side view of the post-mounted connector shown in FIG. 13; XV-XV sectional drawing of FIG. FIG. 14 is an exploded perspective view of the post-mounted connector shown in FIG. 13; The bottom view which expands and shows the principal part of the post-mounting connector of FIG. FIG. 7 is a perspective view showing a post-attached connector as another embodiment of the present invention. Sectional drawing which expands and shows the principal part of the post attachment connector as another one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A retrofit connector 10 according to a first embodiment of the present invention is shown in FIGS. The retrofit connector 10 has a structure in which a covered electric wire 14 as a connection wiring is disposed with respect to the case member 12, and the case member 12 has a first exterior member 16 and a second exterior member 18. It has an axially combined structure. In the following description, the up and down directions refer to the up and down directions in FIG. 3 in principle.

  More specifically, the first exterior member 16 has a generally annular shape as a whole, and is provided with a recessed groove 20 which is open at the axial end surface and extends over the entire circumferential direction. In addition, the first exterior member 16 of the present embodiment is divided at two places in the circumferential direction, and a structure obtained by combining two half bodies 24a and 24b divided by the two divided parts 22a and 22b. It is assumed.

  Furthermore, one divided portion 22a of the first exterior member 16 is connected by the hinge portion 26 so that the two halves 24a and 24b can be relatively tilted about the pin 28 of the hinge portion 26. The circumferential opening width dimension of the other divided portion 22 b of the first exterior member 16 is made variable by the tilting of the two halves 24 a and 24 b connected by the hinge portion 26.

  Furthermore, in the other divided portion 22 b of the first exterior member 16, a circumferential connection portion 30 is provided to mutually connect the circumferential end portions of the two halves 24 a and 24 b. The circumferential connection portion 30 is configured of a hook portion 32 provided at a circumferential end of the half 24a and a projection 34 provided at a circumferential end of the half 24b. The hooking portion 32 has a substantially rectangular plate shape protruding outward in the circumferential direction from the circumferential end of the half body 24a, and is provided with a substantially rectangular hole 36 penetrating in the radial direction. The protrusion 34 protrudes on the outer peripheral surface of the half 24b in a substantially triangular cross section, and the protrusion height of the protrusion 34 is gradually reduced toward the divided portion 22b, and is opposite to the divided portion 22b of the protrusion 34. The surface is a locking surface 37 substantially orthogonal to the circumferential direction.

  Then, when the end portions on the divided portion 22b side of the half members 24a and 24b are made to approach each other, the projection 34 is inserted into the hole 36 of the hooking portion 32, and the hooking portion 32 in the circumferential direction to the projection 34 It is locked. Thus, the end portions on the divided portion 22b side of the half members 24a and 24b are mutually connected in the circumferential direction by the circumferential direction connecting portion 30 formed of the hooking portion 32 and the projection 34, thereby forming an annular first The exterior member 16 is comprised by half body 24a, 24b. Incidentally, the projection 34 is held in a state of being inserted into the hole 36 by the elasticity of the hooking portion 32, and the hooking portion 32 and the divided portion 22b of the half body 24a, 24b by the projection 34 The connected state of is maintained.

  Further, a connecting claw portion 38 is integrally formed on the outer peripheral wall portion of the recessed groove 20 in the first exterior member 16. As shown in FIG. 5, the connection claw portion 38 protrudes axially outward from the outer peripheral wall portion of the recessed groove 20 in the first exterior member 16, and the protruding tip portion projects inward to the inner peripheral side. The stop 40 is integrally formed.

  Furthermore, the rotation limiting part 42 is provided in the 1st exterior member 16 of this embodiment. The rotation restricting portion 42 protrudes further outward in the axial direction (lower side in FIG. 5) from the connecting claw portion 38 in a part of the circumferential direction, and the rotation restricting portion 42 of the first exterior member 16 and the second exterior member 18 described later. In the connected state, it extends onto the outer peripheral surface of the second exterior member 18.

  On the other hand, the second exterior member 18 has a generally annular shape as a whole, and is provided with a recessed groove 44 which is open at the end face in the axial direction and extends over the entire circumference in the circumferential direction. Moreover, the 2nd exterior member 18 of this embodiment is divided | segmented in two places of the circumferential direction, The structure which combined two half-pieces 48a and 48b divided by these two division parts 46a and 46b. It is assumed.

  Furthermore, one divided portion 46 a of the second exterior member 18 is connected by the hinge portion 49 so that the two halves 48 a and 48 b can be relatively tilted about the pin 28 of the hinge portion 49. In addition, the circumferential opening width dimension of the other divided portion 46 b of the second exterior member 18 is made variable by the tilting of the two half members 48 a and 48 b connected by the hinge portion 49.

  Furthermore, the other divided portion 46b of the second exterior member 18 is provided with a circumferential connection portion 50 that connects the circumferential end portions of the two halves 48a and 48b to each other. The circumferential connection portion 50 is configured of a hook portion 52 provided at a circumferential end of the half body 48 a and a protrusion 54 provided at a circumferential end of the half body 48 b. The hooking portion 52 has a substantially rectangular plate shape protruding outward in the circumferential direction from the circumferential end of the half body 48a, and is provided with a substantially rectangular hole 56 penetrating in the radial direction. The protrusion 54 protrudes on the outer peripheral surface of the half body 48b in a substantially triangular cross section, and the protrusion height of the protrusion 54 is gradually reduced toward the divided portion 46b, and is opposite to the divided portion 46 of the protrusion 54. The surface is a locking surface 57 substantially orthogonal to the circumferential direction. In short, in the present embodiment, the circumferential connection portion 30 of the first exterior member 16 and the circumferential connection portion 50 of the second exterior member 18 have substantially the same structure.

  Then, when the end on the divided portion 46b side of the half members 48a and 48b approaches, the protrusion 54 is inserted into the hole 56 of the locking portion 52, and the locking portion 52 is locked to the protrusion 54 in the circumferential direction As a result, the circumferential direction coupling portion 50 is configured. Thus, the end portions on the divided portion 46b side of the half members 48a and 48b are mutually connected in the circumferential direction, and the annular second exterior member 18 is configured by the half members 48a and 48b. The projection 54 is held in a state of being inserted into the hole 56 by the elasticity of the hook portion 52, and the hook portion 52 and the divided portion 46b of the half members 48a and 48b by the projection 54 The connected state of is maintained.

  Furthermore, a connecting groove 58 is integrally formed on the outer peripheral wall of the recessed groove 44 in the second exterior member 18. As shown in FIG. 5, the connection groove portion 58 opens in the outer peripheral surface of the outer peripheral wall portion of the recessed groove 44 in the second exterior member 18 and extends in the circumferential direction.

  The case member 12 is configured by combining the first exterior member 16 and the second exterior member 18 in the axial direction such that the axial openings of the recessed grooves 20 and 44 face each other. In the present embodiment, the first exterior member 16 and the second exterior member 18 are mutually connected in the axial direction by the connection claw portion 38 of the first exterior member 16 and the connection groove portion 58 of the second exterior member 18. It is done. That is, the locking portion 40 of the connection claw portion 38 of the first exterior member 16 is inserted into the connection groove portion 58 of the second exterior member 18, and the locking portion 40 is locked to the groove width inner surface of the connection groove portion 58. Thus, the first exterior member 16 and the second exterior member 18 are connected without being separated in the axial direction. As described above, in the present embodiment, the axial direction connecting portion connecting the first exterior member 16 and the second exterior member 18 in the axial direction is configured by the connection claw portion 38 and the connection groove portion 58.

  Although the locking portion 40 of the connecting claw portion 38 can be inserted axially into the connecting groove portion 58, the locking portion 40 of the connecting claw portion 38 is inserted perpendicularly to the connecting groove portion 58 It can also be done. That is, with the divided portions 22b and 46b of the first and second exterior members 16 and 18 separated in the circumferential direction, the first exterior member 16 and the second exterior member 18 approach each other in a direction perpendicular to the axis. Then, after inserting the locking portion 40 of the connection claw portion 38 in the direction perpendicular to the axis with respect to the connection groove portion 58, the divided portions 22b and 46b of the first and second exterior members 16 and 18 are circumferentially connected It can also be closed by 30, 50.

  Furthermore, relative torsional displacement (relative rotation) in the circumferential direction is permitted for the first exterior member 16 and the second exterior member 18 connected by the connection claw portion 38 and the connection groove portion 58. That is, the first exterior member 16 and the second exterior member 18 are connected in the axial direction by sliding in the circumferential direction while the locking portion 40 of the connection claw portion 38 is inserted into the connection groove portion 58. Relative rotation is possible in the circumferential direction. When the divided portions 22b and 46b are connected in the circumferential direction and the first and second exterior members 16 and 18 are annular, the locking portion 40 of the connection claw portion 38 is inserted into the connection groove portion 58. The connection state between the first exterior member 16 and the second exterior member 18 is maintained by being held in the closed state.

  In the present embodiment, the amount of torsional displacement (rotation amount) of one of the first exterior member 16 and the second exterior member 18 in the circumferential direction is determined by the rotation limiting portion 42 of the first exterior member 16 and the second exterior member 18. It is limited by the contact with the tip end portion of the hooking portion 52. Furthermore, the amount of torsional displacement of the other of the first exterior member 16 and the second exterior member 18 in the circumferential direction is the basis of the rotation limiting portion 42 of the first exterior member 16 and the hook portion 52 of the second exterior member 18. Limited by abutment with the end portion. Thus, in the present embodiment, the relative amount of torsional displacement in the circumferential direction of the first exterior member 16 and the second exterior member 18 is limited to less than one turn on both sides in the circumferential direction. . In the present embodiment, the receiving portion 60 in contact with the rotation restricting portion 42 is provided so as to protrude from the base end portion of the hooking portion 52 of the second exterior member 18, and the rotation restricting portion 42 is hooked It is difficult to get over 52.

  Further, inside the case member 12, an annular accommodation space 62 extending in the circumferential direction is formed by the concave groove 20 of the first exterior member 16 and the concave groove 44 of the second exterior member 18. The accommodation space 62 of the present embodiment extends in a substantially constant cross-sectional shape over the entire circumference in the circumferential direction, whereby the case member 12 has a hollow structure.

  In addition, in the accommodation space 62, a linear coated electric wire 14 is accommodated. The coated wire 14 is an insulated wire or cable or the like in which the outer periphery of a linear conductor made of metal such as copper or aluminum alloy is coated with an insulator such as resin, as shown in FIG. The longitudinally middle portion extends in the circumferential direction, and is folded back at the circumferential middle portion to extend over a length of more than one circumference of the accommodation space 62.

  The coated wire 14 is disposed in a housing space 62 formed in the axial direction between the first exterior member 16 and the second exterior member 18. That is, the coated electric wire 14 is disposed to extend in the circumferential direction in the housing space 62 and is folded back in the circumferential direction at the middle portion in the lengthwise direction, and one end portion thereof is the first exterior member 16. And the other end portion of the second exterior member 18 is provided to the second exterior member 18 through a first extraction hole 64 as a first connection portion provided in the second housing. It extends from the receiving space 62 to the outside through a second takeoff hole 66 as a connection part of Thus, the covered electric wire 14 extends across the first extraction hole 64 of the first exterior member 16 and the second extraction hole 66 of the second exterior member 18. Although the first and second takeout holes 64 and 66 of the present embodiment are formed to penetrate one of the wall portions in the axial direction of the accommodation space 62, for example, the outer periphery of the accommodation space 62 It can also be formed to penetrate the wall.

  In the present embodiment, as shown in FIG. 5, the radial width dimension w of the housing space 62 is larger than the diameter R which is the outer dimension of the coated wire 14 and 2 of the diameter R of the coated wire 14 It is smaller than doubled. The radial width dimension w of the housing space 62 is made larger than the diameter R of the coated wire 14, whereby the coated wire 14 can be prevented from being restrained by the case member 12. Also, the radial width dimension w of the housing space 62 is smaller than twice the diameter R of the coated wire 14, whereby the coated wire is folded back in the housing space 62 and disposed on both sides in the axial direction. 14 can be prevented from passing in the axial direction in the housing space 62, and problems such as the coated electric wire 14 being tangled in the housing space 62 can be prevented.

  The retrofit connector 10 thus constructed is attached to, for example, the first and second links 70 and 72 of the robot arm 68 to be mounted, as shown in FIG. The first link 70 and the second link 72 of the robot arm 68 are mutually connected in a state in which relative torsional displacement is allowed. Then, the first link 70 to be mounted is inserted into the first exterior member 16 through the divided portion 22b, and the second link 72 to be mounted is mounted to the second exterior member The first exterior member 16 and the second exterior member 18 are attached to each of the first and second links 70 and 72 in an extrapolated state by being inserted through the divided portion 46 b with respect to 18. . In the present embodiment, the mounting portion insertion portion is configured by the division portion 22b and the division portion 46b, and the first and second links 70 and 72 to be mounted are first and second through the division portions 22b and 46b. It inserts into the inner periphery of the exterior members 16 and 18.

  The first link 70 and the second link 72 are inserted into the inner peripheries of the first and second exterior members 16 and 18 through one of the divided portion 22 b and the divided portion 46 b constituting the mounting object insertion portion. It may be possible to On the other hand, after either one of the first link 70 and the second link 72 is inserted into the inner circumference of the first and second exterior members 16 and 18 through the division 22b and the division 46b, the first , By moving the second exterior members 16 and 18 in the axial direction, the first and second exterior members 16 and 18 are extrapolated to one of the first and second links 70 and 72, respectively. Also good.

  The coated wire 14 of the rear connector 10 attached to the first and second links 70 and 72 of the robot arm 68 is connected to the first link 70 at the end taken out from the first extraction hole 64 And the end portion taken out from the second extraction hole 66 is connected to the second link 72 side, so that the wiring straddling between the first and second links 70 and 72 becomes the first and second This is realized in a state where relative torsion displacement of the links 70, 72 is allowed. Although the object to be connected is not particularly limited as long as the covered electric wire 14 extends over the first and second links 70 and 72, for example, a sensor provided on the first link 70 side, The control device and the power supply device provided on the second link 72 side can be connected.

  As described above, according to the retrofit connector 10 of the present embodiment, the wiring straddling between the first and second links 70 and 72 connected in a relatively rotatable manner is used for the first and second links 70 and 72. It can be easily realized by the retrofit structure. Moreover, since the covered electric wire 14 which is a wiring extending between the first and second links 70 and 72 is disposed in a state of being accommodated in the accommodation space 62 of the case member 12, the first and second Even if the relative rotation of the links 70, 72 causes deformation or displacement of the coated wire 14, the coated wire 14 does not interfere with other external members.

  Furthermore, in the case member 12 of the present embodiment, since the pin 28 of the hinge portion 26 and the pin 28 of the hinge portion 49 are disposed on substantially the same straight line, the first exterior member 16 and the second exterior member 18 Are mutually connected in the axial direction, as shown in FIG. 7, the divided portion 22 b of the first exterior member 16 and the divided portion 46 b of the second exterior member 18 are integrally opened by the hinge portions 26 and 49. be able to. In addition, the covered wire 14 is folded back in a part in the circumferential direction, and both ends of the covered wire 14 extend to the outside through the first and second extraction holes 64 and 66 formed in the half members 24b and 48b. Since the folded back portion of the covered wire 14 is located on the half body 24a, 48a side of the housing space 62, the case member 12 can be held even when the covered wire 14 is disposed in the housing space 62. It is possible to open in the circumferential direction in the divided portions 22b, 46b.

  As a result, the robot arm 68 is inserted into the case member 12 through the divided portions 22b and 46b, whereby the coated electric wire 14 is axially inserted between the first outer member 16 and the second outer member 18 combined. The rear connector 10 in the assembled state disposed can be attached to the robot arm 68 in an extrapolated state. Thus, with the retrofit connector 10 attachable to the robot arm 68 in a preassembled state, attachment and detachment to and from the robot arm 68 is easy, and wiring extending between the first and second links 70 and 72 is It can be easily provided.

  Note that the first exterior member 16 and the second exterior member 18 may be fitted to the first and second links 70 and 72 of the robot arm 68 and fixed without adhesion, but preferably The overlapping surfaces of the first and second exterior members 16 and 18 and the first and second links 70 and 72 are bonded. Thus, the first and second exterior members 16 and 18 and the first and second links 70 and 72 can be more reliably positioned. Further, by providing a rubber layer on the inner peripheral surfaces of the first exterior member 16 and the second exterior member 18, the adhesion to the first and second links 70 and 72 can be enhanced.

  In the present embodiment, since the first exterior member 16 includes the recessed groove 20 and the second exterior member 18 includes the recessed groove 44, the first exterior member 16 and the second exterior member 16 The axial dimension of 18 is increased. Therefore, a large area of the inner peripheral surface of the first exterior member 16 and the second exterior member 18 to be overlapped and fixed to the first and second links 70 and 72 is secured. Can be firmly fixed to the first and second links 70 and 72.

  In addition, since the housing space 62 for housing the covered wire 14 has a structure in which the recessed groove 20 of the first exterior member 16 and the recessed groove 44 of the second exterior member 18 are butted, The volume can be obtained efficiently large. Therefore, free displacement or deformation of the covered wire 14 disposed in the housing space 62 is permitted, and disconnection or the like due to the coated wire 14 being restrained in the housing space 62 can be avoided.

  Further, in the present embodiment, since the coated wire 14 is disposed in the housing space 62 in a manner of being folded back in the circumferential direction, the first exterior member 16 and the second outer member 16 are not pulled without pulling the coated wire 14. The relative torsional displacement of the exterior member 18 can be tolerated on both sides in the circumferential direction. In addition, since the covered wire 14 is accommodated in the accommodation space 62, even if slack is generated by the covered wire 14 being folded back, there is no interference such as being caught by other members.

  Moreover, in the present embodiment, the relative amount of torsional displacement of the first exterior member 16 and the second exterior member 18 is the engagement between the rotation limiting portion 42 of the first exterior member 16 and the second exterior member 18. It is limited by contact with the part 52. Therefore, excessive torsional displacement of the first exterior member 16 and the second exterior member 18 can be prevented, and problems such as damage to the coated wire 14 due to tension due to excessive torsional displacement can be avoided.

  When the amount of torsional displacement (rotational angle due to torsional displacement) to be permitted in the first and second links 70 and 72 is large, etc., for example, by not providing the rotation restricting portion 42, the first exterior The relative torsional displacement of the member 16 and the second exterior member 18 can also be allowed for more than one turn. In the present embodiment, in particular, since the covered wire 14 is disposed so as to be folded back so as to extend in the circumferential direction with a length of less than two turns, eliminating the rotation restricting portion 42 enables the first exterior member 16 and the The relative torsional displacement of the two exterior members 18 can be largely tolerated.

  Next, FIGS. 8 to 10 show a post-attached connector 80 according to a second embodiment of the present invention. The retrofit connector 80 has a structure in which a flexible flat cable (hereinafter, FFC) 84 as a connection wiring is accommodated in a case member 82, and the case member 82 is a first exterior member 86 and a second exterior member. It consists of 88. In the following description, parts substantially the same as those of the first embodiment are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

  More specifically, the first exterior member 86 has a generally annular shape as a whole, and is provided with a recessed groove 20 extending in the circumferential direction while opening downward. Further, as shown in FIG. 11, the first exterior member 86 is provided with divided portions 22a and 22b at two places in the circumferential direction, and has a structure in which two half bodies 90a and 90b are combined. . In the present embodiment, the hooking portion 32 is formed at the circumferential end of the half 90a on the divided portion 22a side, and the protrusion 34 is formed at the circumferential end on the divided portion 22b of the half 90a. While the projection 34 is formed on the circumferential end of the half 90b on the divided portion 22a side, the hooking portion 32 is formed on the circumferential end of the half 90b on the divided portion 22b side. It is done. In short, the two half bodies 90a and 90b of the present embodiment are independent of each other without being connected by the hinge portion, and the circumferential connection portions 30 are provided at both end portions in the circumferential direction.

  Further, on the outer peripheral wall portion of the recessed groove 20 in the first exterior member 86, a locking claw portion 92 projecting toward the outer peripheral side from the lower end portion is formed over the entire periphery. The locking claw portion 92 is an inclined surface in which the lower end surface is gradually inclined upward toward the outer peripheral side. In addition, as shown in FIG. 12, the protruding height of the inner peripheral wall portion of the recessed groove 20 in the first exterior member 86 is made smaller than the outer peripheral wall portion of the recessed groove 20 in the first exterior member 86. ing. However, since the substantially cylindrical mounting cylindrical portion 94 protruding toward the opposite side to the inner peripheral wall portion of the recessed groove 20 is integrally formed at the inner peripheral end of the first exterior member 86, The axial dimension of the inner peripheral surface of one exterior member 86 is secured sufficiently large.

  Note that, as shown in FIG. 8, the first exterior member 86 is provided with a window portion 96 penetrating vertically in a part of the circumferential direction, and the FFC 84 in the accommodation space 62 described later through the window portion 96. It is possible to visually recognize. The window 96 may be an open through-hole, but if, for example, the window is covered with a transparent resin or the like, the accommodation space 62 can be prevented while preventing entry of foreign matter into the accommodation space 62 or the like. It is possible to make the inside visible.

  On the other hand, the second exterior member 88 has a generally annular shape as a whole, and is provided with a recessed groove 44 extending in the circumferential direction while opening upward. Further, as shown in FIG. 11, the second exterior member 88 is provided with divided portions 46a and 46b at two places in the circumferential direction, and has a structure in which two half bodies 98a and 98b are combined. . The second exterior member 88 has circumferential end portions on the split portion 46a side of the half bodies 98a and 98b connected to each other by the hinge portion 49, and a periphery on the split portion 46b side of the half bodies 98a and 98b. The distance between the direction ends is made variable by the hinge 49. In addition, the circumferential direction connection part 50 comprised by the latching part 52 and the protrusion 54 is provided in the circumferential direction edge part by the side of the division part 46b of the half body 98a, 98b, and the half body 98a, 98b is provided. It is possible to mutually connect circumferential end portions on the divided portion 46b side in the circumferential direction.

  Further, on the outer peripheral wall portion of the recessed groove 44 in the second exterior member 88, a locking portion 100 projecting toward the inner peripheral side from the upper end portion is formed over the entire periphery. The second outer covering member 88 has an inner diameter substantially equal to the inner diameter of the first outer covering member 86 and an outer diameter larger than the outer diameter of the first outer covering member 86.

  The case member 82 is configured by combining the first exterior member 86 and the second exterior member 88 in the axial direction such that the axial openings of the recessed grooves 20 and 44 abut each other. In the present embodiment, since the outer diameter of the first exterior member 86 is smaller than the outer diameter of the second exterior member 88, the outer peripheral wall portion of the recessed groove 20 in the first exterior member 86 It is fitted in the outer peripheral wall part of the concave groove 44 in the two exterior members 88. The inner circumferential wall portion of the recessed groove 20 in the first exterior member 86 is axially butted to the inner circumferential wall portion of the recessed groove 44 in the second exterior member 88.

  Furthermore, as shown in FIG. 12, the locking claw portion 92 of the first exterior member 86 is axially locked with the locking portion 100 of the second exterior member 88, thereby the first exterior member 86. And the second exterior member 88 are connected in the axial direction in a state where the circumferential torsional displacement is allowed. In addition, since the lower surface (the surface on the left side in FIG. 12) of the locking claw portion 92 is an inclined surface, by bringing the first exterior member 86 and the second exterior member 88 close in the axial direction, The locking portion 100 passes over the locking claw portion 92 while being pushed out to the outer periphery, and the locking portion 100 and the locking claw portion 92 are locked in the axial direction.

  Further, a housing space 62 extending in the circumferential direction is formed by the recessed grooves 20 and 44 between the first exterior member 86 and the second exterior member 88, and in the storage space 62, an FFC 84 is provided. It is housed. The FFC 84 extends in one circumferential direction so as to be curved in the thickness direction, and in this embodiment, is accommodated in the accommodation space 62 in a state of being wound in multiples so as to overlap in the radial direction. A first terminal portion 102 extending upward is provided at one end of the FFC 84 in the circumferential direction, and a second terminal portion extending downward at the other end of the FFC 84 in the circumferential direction. 104 is provided. The first terminal portion 102 of the FFC 84 extends to the outside of the accommodation space 62 through the first extraction hole 64 as a connection portion provided in the first exterior member 86, and the second terminal portion 102 of the FFC 84 The terminal portion 104 extends to the outside of the accommodation space 62 through a second extraction hole 66 as a connection portion provided in the second exterior member 88.

  As shown in FIG. 10, in the retrofit connector 80 having such a structure, the first and second exterior members 86 and 88 correspond to the first and second links 70 and 72 of the robot arm 68, respectively. It is attached in extrapolation. In the present embodiment, the first exterior member 86 and the second exterior member 88 are separately attached to the first link 70 and the second link 72 in an extrapolated state. Then, after the FFC 84 is inserted into the concave groove 44 of the second exterior member 88 in a wound state, the first exterior member 86 and the second exterior member 88 are attached to the first and second links 70 and 72. The retrofit connector 80 is configured to be attached to the first and second links 70 and 72 by being combined with each other in the extrapolated state. The first and second terminal portions 102 and 104 of the FFC 84 are sensors or the like on each one side of the first and second links 70 and 72 in the same manner as both ends of the covered wire 14 of the first embodiment. It is connected to a control device etc.

  In the first exterior member 86, the half bodies 90a and 90b independent of each other are fitted to the first link 70 from both sides in the direction perpendicular to the axis, and both ends of the half bodies 90a and 90b in the circumferential direction The parts are attached to the first link 70 by being connected by the circumferential connection parts 30, 30. On the other hand, in the second exterior member 88, the divided portion 46b is closed by the hinge portion 49 in a state where the second link 72 is inserted through the divided portion 46b, and the divided portion 46b of the half 98a, 98b is closed. The circumferential ends are connected to the second link 72 by being connected by the circumferential connection portion 50.

  Furthermore, in the present embodiment, on the inner peripheral portions of both end portions in the circumferential direction in the half members 90a and 90b of the first exterior member 86, the positioning protrusion 106 protruding in the circumferential direction and the positioning hole 108 opened in the circumferential end surface Each one of the two is formed, and the inner peripheral portion of the circumferential end of the half members 90a and 90b is positioned by the fitting of the positioning protrusion 106 and the positioning hole 108. Similarly, one of the positioning projection 106 and the positioning hole 108 is also formed on the inner peripheral portion of the circumferential end of the second exterior member 88 on the half portion 98a, 98b side of the divided portion 46b. The circumferential end of the split body 98a, 98b on the side of the divided portion 46b is positioned by the fitting of the positioning protrusion 106 and the positioning hole 108 at the inner circumferential portion.

  According to such a post-attached connector 80 of the present embodiment, as in the first embodiment, the wire straddling between the first and second links 70 and 72 which allow relative torsional displacement is post-attached. Can easily be realized. In addition, when the first and second links 70 and 72 are torsionally displaced, the FFC 84 follows in the accommodation space 62 by being tightened or unrolled, and hence the first and second links 70 and 72. Torsional displacement is allowed smoothly. In addition, since the FFC 84 which is the connection wiring is accommodated in the accommodation space 62 of the case member 82, even if the relative torsional displacement of the first and second links 70 and 72 causes the FFC 84 to be loosened, It is possible to prevent the FFC 84 from interfering with other members, such as being caught.

  Further, in the present embodiment, the FFC 84 is disposed in the accommodation space 62 in a state of being wound in multiples so as to extend in one direction in the circumferential direction. The relative torsional displacement of the first exterior member 86 and the second exterior member 88 is largely permitted in the circumferential direction. The relative circumferential torsional displacement of the first exterior member 86 and the second exterior member 88 is determined by the torsional end position at which the multiple-wound FFC 84 is wound around the inner circumferential surface of the housing space 62. And, on the other hand, the FFC 84 can be loosened and freely allowed between the other torsion end position which is pressed against the outer peripheral surface of the receiving space 62. Therefore, for example, in the initial position where the retrofit connector 80 is attached to the robot arm 68, the first exterior member 86 and the second exterior member 88 are placed in a state in which the FFC 84 is in the center of the two twist end positions. By setting the relative circumferential twist position, substantially the same relative amount of rotation (twist displacement) can be allowed from the initial position toward both sides in the circumferential direction. In addition, if the relative circumferential twist position of the first exterior member 86 and the second exterior member 88 is set such that the FFC 84 is in a state of being tightened close to any twist end position at the initial position. It is also possible to allow a larger (or smaller) relative rotation amount (torsion displacement amount) on one side in the circumferential direction from the initial position than on the other side.

  In addition, grasping | ascertaining the quantity of the relative twist displacement of the 1st exterior member 86 and the 2nd exterior member 88 by visually confirming FFC84 through the window part 96 formed in the 1st exterior member 86. Is possible. That is, since the FFC 84 slackens as the relative amount of torsional displacement of the first exterior member 86 and the second exterior member 88 increases, the FFC 84 moves to the outer peripheral side in the accommodation space 62. Therefore, by confirming the radial position of the FFC 84 in the accommodation space 62 through the window 96, the relative amount of torsional displacement of the first exterior member 86 and the second exterior member 88 can be confirmed. it can. Therefore, for example, during the work of assembling the first exterior member 86 and the second exterior member 88, the damage of the FFC 84 due to excessive torsional displacement of the first exterior member 86 and the second exterior member 88 can be prevented. Can.

  Further, in the present embodiment, the protrusion height of the inner peripheral wall portion of the recessed groove 20 in the first exterior member 86 is reduced, and the storage space 62 is formed to be biased toward the second exterior member 88 side. The inner peripheral surface of the first exterior member 86 is formed by forming the mounting cylindrical portion 94 projecting to the opposite side to the inner peripheral wall portion of the recessed groove 20 at the inner peripheral end of the first exterior member 86. The axial dimension of is secured. According to this, while securing the areas of the mounting surfaces of the first exterior member 86 and the second exterior member 88 to the first and second links 70 and 72, the axial position of the accommodation space 62 is adjusted. can do.

  In addition, the first exterior member 86 of the present embodiment is formed by connecting the circumferential direction end portions of the half bodies 90 a and 90 b independent of each other by the circumferential direction connecting portions 30 and 30. Thus, the outer diameter of the first exterior member 86 is made smaller than that of the second exterior member 88, and the first exterior member 86 is fitted to the inner periphery of the second exterior member 88. Also, since the hinge portion does not protrude to the outer peripheral surface of the first exterior member 86, the increase in diameter of the post-attached connector 80 is prevented.

  In particular, in the present embodiment, the circumferential direction connecting portions 30, 30 for connecting the half bodies 90a, 90b of the first exterior member 86 in the circumferential direction are more than the outer peripheral wall portion of the recessed groove 20 in the first exterior member 86. It is provided on the outer peripheral surface of the mounting cylindrical portion 94 having a small diameter, and is disposed on the inner peripheral side of the outer peripheral wall portion of the recessed groove 20. As a result, an increase in diameter of the first exterior member 86 due to the provision of the circumferential connection portions 30, 30 is avoided, and downsizing of the post-attached connector 80 is achieved.

  FIGS. 13-15 show a post-attached connector 110 according to a third embodiment of the present invention. The retrofit connector 110 has a structure in which the FFC 84 is disposed in the housing space 62 of the case member 112. In addition, as shown in FIG. 16, the case member 112 has a structure in which the first exterior member 114 and the second exterior member 116 are combined in the axial direction.

  The first exterior member 114 has a substantially annular shape as a whole, and is divided at two places in the circumferential direction, and a hinge portion 26 is provided in one divided portion 22a, and the other is not The circumferential direction connection part 30 is provided in the division part 22b. Further, at the lower end portion of the outer peripheral wall portion of the recessed groove 20 in the first exterior member 114, a locking portion 100 projecting toward the inner peripheral side is integrally formed.

  The second exterior member 116 has a substantially annular shape as a whole and is divided at two places in the circumferential direction, and a hinge portion 49 is provided in one divided portion 46a, and the other is not The circumferential direction connection part 50 is provided in the division part 46b. Further, on the outer peripheral surface of the second exterior member 116, a connecting groove portion 58 extending in the circumferential direction is formed.

  And, as shown in FIG. 17, the first exterior member 114 and the second exterior member 116 are overlapped in the axial direction so that the axial openings of the recessed grooves 20 and 44 face each other, and are housed inside A case member 112 having a cavity 62 is constituted by a first exterior member 114 and a second exterior member 116. In the present embodiment, the locking portion 100 of the first exterior member 114 is inserted into the connection groove portion 58 of the second exterior member 116, and the locking portion 100 is in the axial direction in the groove inner surface of the connection groove portion 58. By being locked, the first exterior member 114 and the second exterior member 116 are positioned in the axial direction. In the present embodiment, the outer peripheral wall portion of the recessed groove 20 in the first exterior member 114 overlaps the outer peripheral wall portion of the recessed groove 44 in the second exterior member 116 in the extrapolation state, while The inner circumferential wall portion of the recessed groove 20 in the exterior member 114 is axially butted to the inner circumferential wall portion of the recessed groove 44 in the second exterior member 116.

  As described above, even in the case where the first exterior member 114 and the second exterior member 116 having different outer diameter dimensions are adopted, both the first exterior member 114 and the second exterior member 116 are hinge portions 26. , 49 can be provided. In the structure of the present embodiment, after the first exterior member 114 and the second exterior member 116 are attached to each one of the first and second links 70 and 72 in an extrapolated state, the first The retrofit connector 110 is formed in a state of being attached to the first and second links 70 and 72 by mutually combining the exterior member 114 and the second exterior member 116 in the axial direction.

  However, the first exterior member 114 and the second exterior member 116 do not necessarily have to be combined in the axial direction so that the locking portion 100 passes over the side wall of the connection groove 58 substantially simultaneously. Specifically, for example, in a state where the divided portions 22b and 46b of the first exterior member 114 and the second exterior member 116 are not connected by the circumferential direction connecting portions 30 and 50, the circumference of the divided portions 22b and 46b is The lower end portion of the outer peripheral wall portion of the recessed groove 20 provided with the locking portion 100 is circumferentially extended from the hinge portions 26 and 49 with respect to the upper end portion of the outer peripheral wall portion of the recessed groove 44 while bringing the direction ends closer to each other. The cover is gradually put away in the direction to gradually insert the locking portion 100 into the connecting groove 58 in the circumferential direction and connect the divided portions 22b and 46b of the first and second exterior members 114 and 116 in the circumferential direction. By connecting the parts 30 and 50 in the circumferential direction, the post-attached connector 110 can be formed in a state of being attached to the first and second links 70 and 72.

  Although the embodiments of the present invention have been described above in detail, the present invention is not limited by the specific description. For example, a plurality of connection wires (the coated wire 14 and the FFC 84) may be provided in the housing space 62 of the case member 12. Specifically, for example, as shown in the appearance of FIG. 18, it is also possible to dispose two coated electric wires 14 and 14 in one storage space (not shown). In this case, in order to prevent the two coated wires 14 and 14 from being entangled in the containing space, the radial width dimension of the containing space is the sum of the diameters of the two covered wires 14 and 14. It is desirable that the When a plurality of coated wires 14 are disposed in the storage space, the diameters of the plurality of coated wires 14 do not have to be the same, and may be different from each other. Thus, in the case of employing a plurality of coated wires 14 having different diameters, the radial width dimension of the storage space is twice the diameter of the coated wire 14 which is larger and thinner than the diameter of the thickest coated wire 14 It is desirable to be smaller than that. When the connection wiring has a flat cross-sectional shape such as FFC 84 in which the width dimension is larger than the thickness dimension, the rigidity varies depending on the bending direction, so that excellent bending deformation characteristics are obtained in the folded portion. For this reason, it is preferable to dispose the large width direction in the direction perpendicular to the axial direction of the storage space. Also in this case, it is desirable that the widthwise dimension in the direction perpendicular to the receiving cavity is larger than the width dimension of the FFC 84 which is the outer dimension of the connection wiring and smaller than twice the width dimension.

  In addition, as shown in FIG. 19, the partition wall 120 is provided to divide the concave groove 20 of the first exterior member 16 and the concave groove 44 of the second exterior member 18 into two in the radial direction. The two receiving spaces 62 can be provided in the radial direction by forming the receiving spaces 62 respectively. Although the partition part 120 shown in FIG. 19 is not limited in material, it is formed of, for example, a synthetic resin such as polyethylene terephthalate. Further, by arranging the coated electric wires 14 in the respective housing spaces 62, the plurality of coated electric wires 14 can be arranged in a state of being separated by the partition portion 120 and not in contact with each other. It is also possible to provide a plurality of partition walls 120 to form three or more storage spaces 62. Further, FIG. 19 exemplifies a structure in which two coated wires 14 are respectively disposed in each housing space 62, but, for example, even if one coated wire 14 is arranged in each housing space 62. It is good, and three or more pieces may be arranged respectively.

  The connection wiring may be a flexible printed circuit (FPC), an optical fiber, or the like in addition to the coated wire 14 or the FFC 84. Also, a plurality of types of connection wires can be disposed in the storage space. Further, as the connection wiring, in addition to one in which the periphery of the conductor is covered with an insulating synthetic resin layer or the like, one obtained by applying an electrically insulating coating on the surface of the conductor may be employed.

  Furthermore, when arranging the connection wiring to the housing space 62 of the case member 12, the coated wire 14 as the connection wiring may be arranged to be wound in one circumferential direction, or the FFC 84 as the connection wiring may be circumferentially It is also possible to arrange in the middle in the middle in the thickness direction. When the connection wiring is folded back, the position of the folding is not particularly limited because it moves due to relative rotation of the first exterior member 16 and the second exterior member 18, and, for example, It may also be set near the longitudinal end. The connection wiring may be folded back in the axial direction of the case member 12 as shown in the first embodiment, or may be folded back in the radial direction of the case member 12.

  Although the first and second extraction holes 64 and 66 are illustrated as the first and second connection parts in the above embodiment, the first and second connection parts are holes for taking out the end of the connection wiring to the outside. It is not limited to Specifically, for example, terminals as first and second connection parts are respectively provided in the first and second exterior members 16 and 18 so as to penetrate the wall part of the housing space 62, The terminals may be electrically connected to each one end of the connection wiring. In this case, the wire on the first link 70 side is connected to the terminal of the first exterior member 16, and the wire on the second link 72 side is connected to the terminal of the second exterior member 18. Thus, the wiring extending over the first and second links 70 and 72 is realized.

  The cross-sectional shapes of the concave grooves 20 and 44 formed in the first exterior member 16 and the second exterior member 18 are not particularly limited, and may be, for example, a semicircular cross section, a semi-elliptical cross section, or an irregular cross section. In addition, the first exterior member 16 and the second exterior member 18 are not necessarily limited to the substantially annular shape, and may have a rectangular ring shape or an irregular ring shape depending on the outer peripheral surface shapes of the first and second links 70 and 72. Etc. may also be employed. Furthermore, as long as the first exterior member 16 and the second exterior member 18 are annular, the inner peripheral shape and the outer peripheral shape may be different from each other. The first exterior member 16 and the second exterior member 18 may be, for example, an annular shape in which one of the inner periphery and the outer periphery is substantially circular and the other of the inner periphery and the outer periphery is substantially polygonal.

  Further, the first exterior member 16 and the second exterior member 18 may not necessarily be provided with divided portions at two places in the circumferential direction, and may be provided with, for example, three or more divided portions, The divided portion may be provided at only one place, and a portion outside the divided portion in the circumferential direction may be elastically deformable.

  Moreover, the specific structure of the circumferential direction connection part which connects the two halves in the circumferential direction in the divided part is merely an example, and is not necessarily due to the engagement of the hook parts 32, 52 and the projections 34, 54. It is not limited to. Specifically, for example, a locking projection is provided on the inner peripheral surface of the plate-like portion extending outward in the circumferential direction from the circumferential end of one half, and the outer peripheral surface of the other half is locked. The recess may be formed, and the circumferential projection may be configured by inserting the locking projection into the locking recess so that the circumferential ends of the two halves are coupled to each other.

  Furthermore, the hinge part which connects two halves in one divided part is not limited to the rotation part around one axis shown in the embodiment, and the first exterior member and the second exterior It is sufficient if it is a mechanical connection structure that allows relative opening and closing motion so that the member and the other divided part open. For example, a hinge portion is formed by a flexible connection body such as a bellows structure or the like, which is allowed to undergo deformation such as bending or bending, or an elastic connection body formed of rubber or the like, The hinge portion can also be configured by the rotating portion around.

  Further, the mounting target to which the retrofit connector is mounted is not limited to the robot arm 68 including the first and second links 70 and 72. For example, when providing a joint (lumbar joint) for allowing torsion at the waist of a humanoid robot and wiring a cable or the like to straddle the hip joint, the first exterior member 16 and the second exterior member 18 Is attached to one of the upper and lower sides of the waist of the humanoid robot across the waist joint, the object to be attached is the first link and the lower side of the trunk that constitute the upper side of the humanoid robot. Are configured to include a second link that

  Furthermore, the mounting target to which the retrofit connector is mounted may be, for example, a rotary drive equipment other than a robot in a factory, such as a turntable or a handle. Furthermore, for example, the retrofit connector according to the present invention can be attached to and used as a steering column that constitutes a steering device of an automobile.

10, 80, 110: Retrofit connector, 14: Coated electric wire (connection wiring), 16, 86, 114: first exterior member, 18, 88, 116: second exterior member, 20, 44: recessed groove, 22, 46: split parts 26, 26: hinge parts 30, 50: circumferential connection parts 32, 52: hook parts (circumferential connection parts) 34, 54: protrusions (circumferential connection parts) 38 The connection claw portion (axial connection portion), 42: the rotation limiting portion, 58: the connection groove portion (axial connection portion), 62: the accommodation space, 64: the first extraction hole (first connection portion), 66 : Second takeout hole (second connection portion) 70: first link (first mounting target) 72: second link (second mounting target) 84: FFC (connection wiring) 90: half body, 92: locking claw portion (axially connecting portion) 100: locking portion (axially connecting portion), 120: partition wall portion

Claims (10)

An annular first exterior member and an annular second exterior member mounted in an extrapolation state on each of the first mounting object and the second mounting object allowed relative twist displacement The first exterior member and the second exterior member are respectively opened in the axial direction and circumferentially extending recessed grooves are formed, and the first openings of the recessed grooves face each other. And the second exterior member are combined with each other in the axial direction, and the first exterior member and the second exterior member are allowed to rotate relative to each other in the circumferential direction, and A housing space extending in the circumferential direction between the exterior member and the second exterior member is formed by the recessed groove, and a first connection portion provided on the first exterior member and the second exterior A connection wire extending between the second connection portion provided to the member and the second connection portion is accommodated in the accommodation space; ,
The first exterior member and the second exterior member are circumferentially divided at least in part in the circumferential direction, and the attachment target insertion portion is divided at the division portion of the first exterior member and the second exterior member. It is comprised, It is made possible to mount | wear the said 1st exterior member and this 2nd exterior member to each one of this 1st mounting object and this 2nd mounting object in an extrapolation state. A retrofit connector characterized by   On the outer peripheral wall of the recessed groove in the first exterior member and the outer peripheral wall of the recessed groove in the second exterior member, the first exterior member and the second exterior member are relatively rotated in the circumferential direction A retrofit connector according to claim 1, wherein an axial connection is provided which connects axially in a possible manner.   The rear connector according to claim 1 or 2, wherein at least one of the first exterior member and the second exterior member is provided with a circumferential connection portion connecting the divided portions in the circumferential direction.   The retrofit connector according to any one of claims 1 to 3, wherein the connection wiring is folded back circumferentially at an intermediate portion in the accommodation space.   The post-connector according to any one of claims 1 to 4, wherein the connection wiring is wound so as to extend in one circumferential direction in the accommodation space.   The retrofit connector according to any one of claims 1 to 5, wherein a width dimension in a direction perpendicular to an axis of the housing space is larger than an outer dimension of the connection wiring and smaller than twice an outer dimension of the connection wiring.   The retrofit connector according to any one of claims 1 to 6, further comprising a rotation restricting portion for restricting an amount of relative rotation of the first exterior member and the second exterior member in the circumferential direction.   At least one of the first exterior member and the second exterior member is provided with the divided portions at two places in the circumferential direction, and one of the divided portions is connected by a hinge portion. The retrofit connector as described in any one of 1-7.   The at least one of the said 1st exterior member and the said 2nd exterior member WHEREIN: The said division part is provided in two places of the circumferential direction, and can be divided | segmented into two halves. Retrofit connector according to one item.   Partition walls are provided to divide the recessed grooves of the first exterior member and the second exterior member into a plurality of grooves in the groove width direction, and the housing spaces are respectively formed on both sides of the partitions. The retrofit connector according to any one of claims 1 to 9, wherein the connection wiring is accommodated and disposed in each of the plurality of accommodation spaces.

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