winding device

Abstract

To provide a wrapping apparatus which can easily attach a covering member to a covering object.SOLUTION: A wrapping apparatus 1 wraps roll tape R around an electric wire bundle 23 provided with an axis line L. The wrapping apparatus 1 comprises a link base plate 60 moving forward and backward in a cross direction X intersecting with a direction of the axis line L of the electric wire bundle 23. Further, the wrapping apparatus 1 comprises a driven head part 70 sandwiching the roll tape R in a space with the outer circumferential face of the electric wire bundle 23 and attaching the same. Further, the wrapping apparatus 1 comprises a link mechanism 80 rotating the driven head part 70 around the axis line L of the electric wire bundle 23 with the forward-backward movement of the link base plate 60.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a winding device. [Background technology]

[0002] Conventionally, there is known a winding device that applies a tape as a covering member to electric wires that constitute a wire harness while winding the tape (see, for example, Patent Document 1). The tape winding device (winding device) described in Patent Document 1 includes a tape unwinding machine that unwinds a roll of tape (covering member), and a tape winding machine that circumferentially wraps the unwound roll of tape around a bundle of electric wires (an object to be covered) and applies the tape. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-26439 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described winding device, the roll tape attached to the electric wire bundle is cut by a cutter blade. After the roll tape is cut, the electric wire bundle is removed from the winding device. However, when the roll tape is cut, a cutting allowance is required. Therefore, the end of the roll tape serving as the cutting allowance is not attached to the electric wire bundle, and the unattached end of the roll tape remains on the electric wire bundle removed from the winding device. In this case, the end of the roll tape that is not attached to the electric wire bundle needs to be manually attached to the electric wire bundle each time, which makes it difficult to efficiently manufacture wire harnesses.

[0005] An object of the present invention is to provide a wrapping device that can easily attach a covering material to an object to be covered. [Means for solving the problem]

[0006] In order to solve the above problems and achieve the object, a winding device is a winding device that winds a covering material around a covering target having an axis extending in a predetermined direction, and includes a base unit that moves back and forth in a direction intersecting the axis, a driven head unit that sandwiches the covering material between itself and the outer peripheral surface of the covering target and attaches it, and a rotating unit that rotates the driven head unit about the axis as the base unit moves back and forth. the driven head portion is arranged so as to be able to be pressed against the object to be coated toward the traveling side in the intersecting direction, and in a pressed state, displacement toward the traveling side is restricted; the rotating portion is a link mechanism that connects the base portion and the driven head portion and converts the forward / backward movement of the base portion into rotation of the driven head portion; when the base portion is moved toward the traveling side in a state in which the displacement of the driven head portion is restricted, the link mechanism rotates the driven head portion about the axis while pressing it against the object to be coated; the object to be coated is an electric wire, and the base portion and the driven head portion are arranged to extend in the intersecting direction and in a width direction intersecting the intersecting direction when viewed from the axial direction of the electric wire, The link mechanism includes a first protrusion protruding from the driven head portion in the axial direction, and a link groove that is provided in the base portion and opens in the axial direction to accommodate the first protrusion, the first protrusion being spaced apart in the width direction relative to the axis, and the link groove including a first inclined groove positioned on one side in the width direction as it moves toward the retreating side in the intersecting direction, and a second inclined groove that is continuous with the first inclined groove and positioned on the other side in the width direction as it moves toward the retreating side, and as the base portion moves toward the advancing side, the first protrusion is guided from the first inclined groove to the second inclined groove, and the driven head portion rotates about the axis while being pressed against the outer circumferential surface of the electric wire. It is characterized by: Further, a winding device is a winding device that winds a covering material around a target to be coated having an axis extending in a predetermined direction, and includes a base portion that moves back and forth in a direction intersecting the axis, a driven head portion that sandwiches and attaches the covering material between the base portion and the target to be coated and the driven head portion, and a rotating portion that rotates the driven head portion about the axis as the base portion moves back and forth, wherein the driven head portion is arranged so as to be able to be pressed against the target to be coated toward the traveling side in the intersecting direction, and in a pressed state, displacement toward the traveling side is restricted, and the rotating portion is a link mechanism that connects the base portion and the driven head portion and converts the forward and backward movement of the base portion into rotation of the driven head portion, and in a state where the displacement of the driven head portion is restricted, the link mechanism When the base portion is moved toward the forward direction, the driven head portion is rotated around the axis while being pressed against the object to be coated, and the link mechanism includes an auxiliary link that supports the driven head portion, and the auxiliary link includes a support shaft that penetrates the object to be coated in the axial direction and rotatably supports the driven head portion, a second protrusion that protrudes from the base portion in the axial direction, and a connecting plate that connects the support shaft and the second protrusion and rotates around the support shaft, and the connecting plate is provided with a guide groove that extends in a direction from the side of the support shaft to the side of the second protrusion and that accommodates the second protrusion, and the second protrusion is guided by the guide groove to move closer to or away from the support shaft. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a wrapping device that can easily attach a covering material to an object to be covered. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an overall perspective view of a wire harness manufacturing apparatus including a winding device according to an embodiment; [Figure 2] FIG. [Figure 3] FIG. 2A is a schematic diagram showing the winding device in an initial state in the joining process, and FIG. 2B is a schematic diagram showing the winding device in a second state in the joining process. [Figure 4] 1C is a schematic diagram showing the winding device in a third state in the joining process, and FIG. 1D is a schematic diagram showing the winding device in a completed state in the joining process. DETAILED DESCRIPTION OF THE INVENTION

[0009] The winding device 1 will be described below. The winding device 1 constitutes a part of a wire harness manufacturing apparatus 100 for manufacturing a wire harness WH to be installed in a vehicle or the like. FIG. 1 is an overall perspective view of the wire harness manufacturing apparatus 100 including the winding device 1 according to this embodiment. In the drawing, the axial direction of an electric wire 20 (to be covered) constituting a part of the wire harness WH is referred to as the "vertical direction Z," one side of the vertical direction Z is referred to as the "upper side Z1," and the other side is referred to as the "lower side Z2." One of the intersecting directions intersecting the vertical direction Z is referred to as the "front-rear direction X," and the other is referred to as the "width direction Y." One side of the front-rear direction X is referred to as the "forward side X1," and the other side is referred to as the "reverse side X2." One side of the width direction Y is referred to as the "left side Y1," and the other side is referred to as the "right side Y2." The vertical direction Z, the front-rear direction X, and the width direction Y are perpendicular to one another. It should be noted that these definitions of directions are given for the sake of convenience of explanation only, and do not limit the directions when the winding device 1 and the wire harness production device 100 are manufactured or used.

[0010] The winding device 1 is a device for winding a roll tape R as a covering material around an electric wire 20 during the manufacture of a wire harness WH. The winding device 1 includes a main body 10 supporting the electric wire 20 and a slide unit 30 connected to the main body 10 so as to be slidable in the up-down direction Z relative to the main body 10. First, the main body 10 and the wire harness WH will be described. As shown in FIG. 1 , the main body 10 is formed by combining multiple metal plates or the like. The main body 10 includes a support plate 11 at its lower end. The support plate 11 is formed in a rectangular plate shape extending in the front-rear direction X and the width direction Y and is fixed to an installation surface (not shown) by fastening members such as bolts. A support pillar 12 is provided on the left edge Y1 of the upper surface of the support plate 11. The support pillar 12 is formed in a substantially rectangular parallelepiped shape extending in the up-down direction Z and the front-rear direction X and rises upward Z1 from the upper surface of the support plate 11. A rod-shaped slide shaft 14 is provided on a side wall surface 13 of the support pillar 12 facing the right side Y2. The slide shaft 14 is fixed to the center of the side wall surface 13 in the front-rear direction X and extends in the up-down direction Z.

[0011] A fixing portion 15 for fixing the electric wires 20 during manufacturing of the wire harness WH is provided on the forward side X1 of the support portion 12. The fixing portion 15 includes a first terminal holder 16 located on the upper side Z1 and a second terminal holder 17 located on the lower side Z2. The first terminal holder 16 is formed in a box shape and extends in the width direction Y and the up-down direction Z. The second terminal holder 17 is formed in a generally cubic shape and protrudes from the side wall surface 13 to the right side Y2. The electric wires 20 fixed to the fixing portion 15 are, for example, coated electric wires composed of a core wire and a coating that circumferentially covers the core wire. Two electric wires 20, for example, one for a positive electrode and one for a negative electrode, are provided adjacent to each other with a gap in the width direction Y and extend in the up-down direction Z. A first terminal 21 is attached to the upper end of each electric wire 20. The first terminal 21 is fixed to the lower end of the first terminal holder 16. A second terminal 22 is attached to the lower end of each electric wire 20 to bundle the lower ends together. The second terminal 22 is fixed to the upper surface of the second terminal holder 17. The electric wires 20 fixed to the fixing portion 15 in this manner extend in the vertical direction Z while maintaining a predetermined tension.

[0012] Next, the sliding portion 30 will be described. As shown in FIG. 1, the sliding portion 30 includes a connecting portion 31 connected to the sliding shaft 14. The connecting portion 31 is formed in a substantially rectangular box shape and protrudes from the side wall surface 13 of the support portion 12 to the right side Y2. A vertical plate portion 33 is attached to a wall surface 32 on the right side Y2 of the connecting portion 31. The vertical plate portion 33 is formed in a plate shape and extends in the up-down direction Z and the front-rear direction X. A horizontal plate portion 35 protruding to the right side Y2 is formed on a plate surface 34 on the right side Y2 of the vertical plate portion 33. The horizontal plate portion 35 is formed in a plate shape and is perpendicular to the plate surface 34, extending in the width direction Y and the front-rear direction X. A notch 36 that opens to the traveling side X1 is formed at the end of the traveling side X1 of the horizontal plate portion 35. The cutout 36 surrounds the left side Y1, the right side Y2, and the retreating side X2 of the electric wire 20, thereby restricting displacement of the electric wire 20 in the width direction Y and displacement of the electric wire 20 toward the retreating side X2. A plate-shaped installation base 37 is attached to the upper edge of the cutout 36 so as to fit along the upper edge.

[0013] The installation base 37 is rotatable in the circumferential direction of the electric wire 20 by a drive mechanism (not shown). A tape winding machine 40 is installed on the upper surface of the installation base 37. The tape winding machine 40 holds a roll of tape R as a covering material to be wound around the electric wire 20, and winds the pulled-out roll of tape R around the electric wire 20 and cuts it. The tape winding machine 40 has a rotating shaft 41 that rises upward from the installation base 37 to the upper side Z1. The rotating shaft 41 is attached with the roll of tape R wound around the axis of the rotating shaft 41. The roll of tape R is an adhesive tape made of an insulating material such as resin, and is supported rotatably around the axis of the rotating shaft 41. A tape holder 42 is attached around the roll of tape R in the circumferential direction. The tape holder 42 holds the roll of tape R and prevents the roll of tape R from falling off. The roll tape R held by the tape holder 42 has its end chucked by a drawer (not shown) and is drawn out from the tape holder 42.

[0014] The drawn-out roll tape R rotates in the circumferential direction of the electric wires 20 as the tape winding machine 40 rotates in conjunction with the rotation of the installation table 37, and is attached to the outer peripheral surfaces of the two electric wires 20 while rotating. By attaching the roll tape R, the electric wires 20 are brought closer to each other in the radial direction to form an electric wire bundle 23 (electric wire; see FIGS. 3(A), 3(B), 4(A), and 4(B)). The roll tape R attached to the electric wires 20 is cut by a cutter blade (not shown) and separated from the roll tape R in the tape holder 42. Note that, at this time, a cutting allowance is required for the roll tape R, and therefore, an end of the roll tape R with a length corresponding to the cutting allowance remains unattached to the electric wire bundle 23. For this reason, the sliding section 30 is provided with an attachment unit 50 for attaching the end of the roll tape R to the electric wire bundle 23. The attachment unit 50 is installed on the upper surface of the horizontal plate section 35 of the sliding section 30.

[0015] As shown in FIG. 2, the joining unit 50 has a bottom plate portion 51 that forms a lower end surface. The bottom plate portion 51 extends along the upper surface of the side plate portion 35. A first standing wall 52 that rises on the upper side Z1 and extends in the width direction Y is formed on the right side Y2 portion of the upper surface of the bottom plate portion 51. A regulating shaft 53 that extends in the front-rear direction X penetrates the plate surface of the first standing wall 52. A nut 53a is threadedly engaged with the end of the regulating shaft 53 on the traveling side X1. In an initial state that will be described later, the end surface of the nut 53a on the traveling side X1 and the end surface of the regulating shaft 53 on the traveling side X1 regulate a driven head portion 70 (described later) from rotating in the right direction a about the axis L of the electric wire bundle 23. A second standing wall 54 is formed at the end of the left side Y1 of the first standing wall 52, continuing from the first standing wall 52 and extending toward the retreating side X2, and a third standing wall 55 is formed on the wall surface of the second standing wall 54 facing the left side Y1, continuing from the second standing wall 54 and extending toward the left side Y1. A piston portion 56 serving as a drive portion is attached to the third standing wall 55.

[0016] The piston portion 56 includes a cylinder tube 57 that penetrates the third standing wall 55 and extends from the wall surface of the third standing wall 55 on the retreating side X2 toward the retreating side X2. A piston (not shown) is housed inside the cylinder tube 57. A piston rod 58 is integrally provided with the piston. The piston rod 58 is a drive shaft, and has an axis in the front-rear direction X (intersecting direction), protruding from the cylinder tube 57 toward the advancement side X1 and extending to the advancement side X1. The piston rod 58 is movable back and forth in the front-rear direction X together with the piston. A link base plate 60 (base portion) is fixed to the end of the piston rod 58 on the advancement side X1. The link base plate 60 is formed in a plate shape and extends in the front-rear direction X and the width direction Y. The portion of the link base plate 60 on the retreating side X2 and left side Y1 is cut out to form an L-shaped notch 61 when viewed from above, and the end of the piston rod 58 on the advancing side X1 is fixed to the wall surface of this notch 61 facing the retreating side X2.

[0017] This fixation allows the link base plate 60 to move back and forth in the front-rear direction X together with the piston rod 58. A driven head portion 70 that displaces in accordance with the forward and backward movement of the link base plate 60 is connected to the link base plate 60. The driven head portion 70 is formed in a plate shape that extends in the front-rear direction X and the width direction Y. A recess 71 that is recessed toward the retreating side X2 is formed on the end surface of the driven head portion 70 on the forward side X1. The recess 71 is formed in a substantially U-shape that opens to the forward side X1 when viewed from the up-down direction Z. An adhesive member 72 is fixed to the inner wall surface of the recess 71. The adhesive member 72 adheres an end of the roll tape R to the wire bundle 23 by sandwiching the roll tape R between the recess 71 and the outer peripheral surface of the wire bundle 23. The adhesive member 72 is formed in a substantially J-shape when viewed from the up-down direction Z using an elastic material such as resin.

[0018] The adhesive tape 72 includes a shape-absorbing portion 73 (curved portion) that conforms to the outer circumferential shape of the electric wire bundle 23, and a pressing portion 74 that is continuous with one end of the shape-absorbing portion 73 and extends toward the traveling side X1. The inner surface of the shape-absorbing portion 73 extends along the outer circumferential surface of the electric wire bundle 23. The inner surface of the shape-absorbing portion 73 is provided so as to be pressed radially inward against the outer circumferential surface of the electric wire bundle 23, and this pressing causes the shape-absorbing portion 73 to elastically deform while holding the electric wire bundle 23. This configuration ensures a sufficient contact area between the adhesive tape 72 and the electric wire bundle 23 to accommodate electric wire bundles 23 of various diameters, thereby reliably holding the electric wire bundle 23.

[0019] The pressing portion 74 is continuous with the end of the shape absorbing portion 73 on the left side Y1 and extends toward the traveling side X1. An inner surface 74a of the pressing portion 74 is capable of pressing an end (not shown) of the roll tape R that is not attached to the electric wire bundle 23 toward the outer surface of the electric wire bundle 23, and this pressing causes the end of the roll tape R to be attached to the outer peripheral surface of the electric wire bundle 23. The unattached end of the roll tape R is a portion that protrudes continuously from the roll tape R that is attached to the outer peripheral surface of the electric wire bundle 23. The link base plate 60 and the driven head portion 70 formed in this manner are connected by a link mechanism 80.

[0020] The link mechanism 80 is a mechanism that converts the forward / backward movement of the link base plate 60 into the rotation of the driven head portion 70, and constitutes a rotating portion of this embodiment that rotates the driven head portion 70 about the axis L in accordance with the forward / backward movement of the link base plate 60. As shown in FIG. 3(A), the link mechanism 80 includes a first link 81. The first link 81 includes a link groove 82 provided in the link base plate 60 and a first protrusion 85 provided in the driven head portion 70. The link groove 82 is provided on the lower surface of the link base plate 60 and opens to the lower side Z2. The link groove 82 includes a first inclined groove 83 that is inclined so as to be positioned on the left side Y1 as it moves from the forward side X1 toward the reverse side X2. The link groove 82 also includes a second inclined groove 84 that is continuous with the end of the first inclined groove 83 on the reverse side X2 and is inclined so as to be positioned on the right side Y2 as it moves toward the reverse side X2. The first inclined groove 83 and the second inclined groove 84 form the link groove 82 in a substantially V-shape when viewed from the vertical direction Z.

[0021] The first protrusion 85 is formed in a cylindrical shape extending in the vertical direction Z and protrudes from the top surface of the driven head portion 70 to the upper side Z1. The position where the first protrusion 85 is formed is set at a corner on the retreating side X2 and left side Y1 of the driven head portion 70. That is, when the top surface of the driven head portion 70 is viewed from the vertical direction Z, the first protrusion 85 is disposed at a position spaced apart from the axis L to the left side Y1 (width direction Y). The first protrusion 85 is housed in the link groove 82 by being inserted into the link groove 82 from the lower side Z2 toward the upper side Z1. The first protrusion 85 is guided by the inner wall surfaces (83a, 84a) of the link groove 82 and is therefore freely movable within the link groove 82 to the forward side X1 or the retreating side X2. The first protrusion 85 is also rotatable around the axis L within the link groove 82 while being guided by the inner wall surfaces (83a, 84a) of the link groove 82.

[0022] The link mechanism 80 further includes an auxiliary link 86. The auxiliary link 86 supports the driven head portion 70, thereby stably maintaining the driven head portion 70 connected to the link base plate 60. The auxiliary link 86 includes a pair of upper and lower second protrusions 87 provided on the link base plate 60, a support shaft 88 provided on the driven head portion 70, and a pair of upper and lower connecting plates 89 connecting the second protrusions 87 and the support shaft 88. The pair of upper and lower second protrusions 87 protrude outward in the vertical direction Z from the upper and lower surfaces of the link base plate 60, respectively. The second protrusions 87 are formed at positions on the link base plate 60 adjacent to the second inclined groove 84 in the width direction Y and to the left Y1 of the second inclined groove 84. The support shaft 88 is provided to penetrate the driven head portion 70 in the vertical direction Z and supports the driven head portion 70 rotatably about its axis. The support shaft 88 is disposed at a position adjacent to the shape absorbing portion 73 in the width direction Y on the driven head portion 70 and to the right Y2 of the shape absorbing portion 73.

[0023] The connecting plates 89 are paired, with one connecting plate 89 arranged on the upper side Z1 of the link base plate 60 and the driven head portion 70 and the other connecting plate 89 arranged on the lower side Z2 of the link base plate 60 and the driven head portion 70. Each connecting plate 89 is formed in a flat plate shape facing the link base plate 60 and the driven head portion 70 in the vertical direction Z. One end 89a of the connecting plate 89 is rotatably supported by the support shaft 88 and is rotatable around the axis of the support shaft 88. A guide groove 89c is formed in the plate surface of the connecting plate 89, penetrating in the vertical direction Z and extending toward the other end 89b. A second protrusion 87 is inserted in the vertical direction Z and accommodated in the guide groove 89c. The second protrusion 87 is connected to the support shaft 88 by being accommodated in the guide groove 89c. Furthermore, due to this accommodation, the guide groove 89c extends from the side where the support shaft 88 is located toward the side where the second protrusion 87 is located. The second protrusion 87 can move relatively close to or away from the support shaft 88 by being guided by the inner edge of the guide groove 89c.

[0024] Next, the operation of the winding device 1 will be described. First, as shown in FIG. 1 , two electric wires 20 are fixed to the fixing portion 15 of the main body 10 while extending in the vertical direction Z. Next, an end of the roll tape R housed in the tape holder 42 is chucked by a drawer (not shown) to pull out a predetermined amount. Next, the installation table 37 is rotated around the axis L. This rotation causes the tape winding machine 40 fixed to the installation table 37 to rotate in the circumferential direction of the electric wires 20. This rotation causes the roll tape R to be attached to the outer peripheral surface of the electric wires 20 while rotating. Note that, at this time, the notches 36 restrict displacement of the two electric wires 20 in the width direction Y and the retreating side X2, so that the roll tape R can be stably attached to the electric wires 20. The electric wires 20 to which the roll tape R has been attached are brought closer to each other in the radial direction and bundled together to form a single electric wire bundle 23. The axis L of the electric wire bundle 23 extends in the vertical direction Z, which is a predetermined direction. Next, the roll tape R is cut by a cutter blade (not shown), so that the roll tape R constituting the electric wire bundle 23 and the roll tape R in the tape holder 42 are separated.

[0025] In this state, as described above, an end of the roll tape R remains unattached to the outer peripheral surface of the electric wire bundle 23 by the length of the cutting allowance. Therefore, next, the remaining end of the roll tape R is attached to the outer peripheral surface of the electric wire bundle 23. In this embodiment, the process of attaching the unattached end of the roll tape R to the outer peripheral surface of the electric wire bundle 23 is referred to as the attaching process. First, the slide part 30 is slid in the up-down direction Z along the slide shaft 14, so that the applicator 72 of the applicator unit 50 and the end of the roll tape R face each other in the front-rear direction X. Then, the entire applicator unit 50 is moved in the traveling direction X1 by a drive part (not shown) until the driven head part 70 abuts against the electric wire bundle 23. This state is referred to as the initial state in the applicator process. FIG. 3(A) shows the winding device 1 in the initial state of the applicator process. In the initial state, the end faces of the link base plate 60 and the driven head part 70 on the traveling side X1 face the traveling side X1. In the driven head 70, the applicator 72 is pressed against the wire bundle 23 toward the traveling side X1. In this pressed state, the displacement of the driven head 70 toward the traveling side X1 is restricted except for the amount by which the wire bundle 23 bends slightly toward the traveling side X1. In other words, the displacement of the driven head 70 toward the traveling side X1 is almost entirely restricted by the wire bundle 23.

[0026] Although not shown, an end of the roll tape R is sandwiched between the inner surface 74a of the pressing portion 74 and the outer peripheral surface of the wire bundle 23. In the initial state, the end face of the retreating side X2 of the driven head portion 70 abuts against the end face of the advancing side X1 of the regulating shaft 53 and the end face of the advancing side X1 of the nut 53a. This abutment restricts the rotation of the driven head portion 70 in the right direction a about the axis L of the wire bundle 23. In the initial state, the first protrusion 85 of the first link 81 is located at the end of the advancing side X1 of the first inclined groove 83 of the link groove 82. The connecting plate 89 of the auxiliary link 86 is inclined with respect to the front-rear direction X so that one end 89a is located on the advancing side X1 and the right side Y2, and the other end 89b is located on the retreating side X2 and the left side Y1. The second protrusion 87 of the auxiliary link 86 is located at the end of the guide groove 89c on the side where the other end 89b is located.

[0027] Next, the piston 56 is driven from the initial state. When the piston 56 is driven, the piston rod 58 moves toward the traveling side X1, resulting in the second state. FIG. 3(B) shows the winding device 1 in the second state of the joining process. When changing from the initial state to the second state, the link base plate 60 is displaced toward the traveling side X1 compared to the initial state due to the driving of the piston rod 58. At this time, as described above, the displacement of the driven head 70 toward the traveling side X1 is almost restricted by the wire bundle 23. Therefore, while the entire position of the driven head 70 is hardly displaced toward the traveling side X1, the first protrusion 85 of the driven head 70 is pressed toward the traveling side X1 by the inner wall surface 83a of the first inclined groove 83 of the link base plate 60 moving toward the traveling side X1.

[0028] This pressure generates a moment in the right direction a about the axis L in the driven head portion 70, and this moment causes the driven head portion 70 to rotate in the right direction a1 about the axis L while being pressed against the wire bundle 23. Then, as the link base plate 60 moves toward the traveling side X1, the first protrusion 85 is guided by the inner wall surface 83a of the first inclined groove 83 and gradually positioned on the left side Y1. As a result, the distance between the first protrusion 85 in the width direction Y and the axis L gradually increases. This guidance causes the driven head portion 70 to further rotate in the right direction a. In the second state, the first protrusion 85, which has been guided, is displaced within the link groove 82 so that it is positioned at the boundary between the first inclined groove 83 and the second inclined groove 84.

[0029] As a result of the rotation of the driven head portion 70 as described above, the applicator 72 slides circumferentially along the outer peripheral surface of the wire bundle 23. This sliding causes the end of the roll tape R, which is sandwiched between the inner surface 74a of the pressing portion 74 of the applicator 72 and the outer peripheral surface of the wire bundle 23, to be gradually applied along the outer peripheral surface of the wire bundle 23. At this time, the connecting plate 89 of the auxiliary link 86 rotates in the right direction a, so that the inclination of the connecting plate 89 becomes steeper. At this time, the position of the second protrusion 87 of the auxiliary link 86 changes within the guide groove 89c, and the second protrusion 87 moves relatively close to the support shaft 88 of the auxiliary link 86.

[0030] Next, the piston 56 is further driven from the second state. When the piston 56 is driven, the piston rod 58 and the link base plate 60 move toward the traveling side X1, resulting in the third state. FIG. 4C shows the winding device 1 in the third state during the joining process. When changing from the second state to the third state, the link base plate 60 is displaced toward the traveling side X1 by the drive of the piston rod 58 compared to the second state. At this time, the first protrusion 85 of the driven head 70 is pressed toward the traveling side X1 by the boundary between the first inclined groove 83 and the second inclined groove 84. Due to this pressure, the first protrusion 85 rotates in the right direction a1 about the axis L while being guided by the boundary, and this rotation rotates the driven head 70 in the right direction a1 about the axis L.

[0031] As a result of the rotation of the driven head 70 as described above, the applicator 72 further slides circumferentially along the outer peripheral surface of the wire bundle 23. This sliding causes the end of the roll tape R sandwiched between the inner surface 74a of the pressing portion 74 and the outer peripheral surface of the wire bundle 23 to be further applied along the outer peripheral surface of the wire bundle 23. As a result of the rotation of the driven head 70, the connecting plate 89 of the auxiliary link 86 is inclined so that one end 89a is located on the retreating side X2 and the right side Y2, and the other end 89b is located on the advancing side X1 and the left side Y1, with respect to the front-rear direction X. At this time, the position of the second protrusion 87 of the auxiliary link 86 changes within the guide groove 89c, and the relative distance between the second protrusion 87 and the support shaft 88 of the auxiliary link 86 becomes even closer.

[0032] Next, the piston portion 56 is further driven from this third state. When the piston portion 56 is driven, the piston rod 58 moves toward the traveling side X1, and the winding device 1 reaches the completed state. FIG. 4(D) shows the winding device 1 in the completed state of the joining process. When changing from the third state to the completed state, the link base plate 60 is displaced toward the traveling side X1 by the driving of the piston rod 58 compared to the third state. At this time, the first protrusion 85 of the driven head portion 70 is pressed toward the traveling side X1 by the inner wall surface 84a of the second inclined groove 84 of the link base plate 60 moving toward the traveling side X1.

[0033] This pressure causes the driven head 70 to further rotate in the right direction a1 around the axis L. Then, as the link base plate 60 moves toward the traveling side X1, the first protrusion 85 is guided by the inner wall surface 84a of the second inclined groove 84 and gradually positioned to the right side Y2. As a result, the distance between the axis L and the first protrusion 85 in the width direction Y gradually decreases. This guidance causes the driven head 70 to be pressed toward the right side Y2, where the wire bundle 23 is located. Then, as the driven head 70 rotates as described above, the applicator 72 further slides circumferentially along the outer peripheral surface of the wire bundle 23. This sliding causes the end of the roll tape R sandwiched between the inner surface 74a of the pressing portion 74 and the outer peripheral surface of the wire bundle 23 to be entirely attached along the outer peripheral surface of the wire bundle 23. Furthermore, by pressing the driven head portion 70 toward the electric wire bundle 23 as described above, the end of the roll tape R is reliably attached to the outer peripheral surface of the electric wire bundle 23. This attachment completes the attachment process.

[0034] According to the above-described joining process, as the link base plate 60 moves toward the traveling side X1, the first protrusion 85 is guided from the first inclined groove 83 to the second inclined groove 84, causing the driven head portion 70 to rotate in the right direction a about the axis L. The amount of rotation of the driven head portion 70 can be changed as appropriate by adjusting the relative positions of the link base plate 60 and the driven head portion 70, the shape and size of the link groove 82, and the like. Here, for example, it is more preferable to set the driven head portion 70 so that it can rotate more than 90° about the axis L compared to the initial state, because this allows the end of the roll tape R that is not attached to the outer peripheral surface of the electric wire bundle 23 to be reliably joined.

[0035] After the above-mentioned joining step is completed, if the piston rod 58 is moved in the retreating side X2, the operation opposite to that of the joining step is performed. That is, as the link base plate 60 moves in the retreating side X2, the first protrusion 85 is guided from the second inclined groove 84 to the first inclined groove 83, and the driven head portion 70 rotates in the left direction b about the axis L.

[0036] According to the above-described embodiment, by driving the link base plate 60 (base portion) to move it in the front-rear direction X (transverse direction), the link mechanism 80 (rotating portion) can rotate the driven head portion 70 about the axis L of the electric wire bundle 23 (the object to be covered). When the driven head portion 70 rotates, the roll tape R (covering material) sandwiched between the driven head portion 70 and the outer peripheral surface of the electric wire bundle 23 moves in the circumferential direction of the electric wire bundle 23 along the outer peripheral surface of the electric wire bundle 23. This movement causes the roll tape R to be attached in the circumferential direction of the electric wire bundle 23 along the outer peripheral surface of the electric wire bundle 23. This configuration eliminates the need to temporarily remove the electric wire bundle 23 from the winding device 1 and manually attach the end of the roll tape R to the electric wire bundle 23 each time in order to attach the roll tape R. Therefore, it is possible to provide a winding device 1 that can easily attach a covering material to the object to be covered. This configuration also makes it possible to efficiently manufacture wire harnesses WH.

[0037] Furthermore, with the above configuration, a rotating section can be constructed using the link mechanism 80 that converts the forward and backward movement of the link base plate 60 into the rotation of the driven head portion 70, and the winding device 1 can be manufactured. With this configuration, the displacement of the driven head portion 70 toward the traveling side X1 can be restricted by pressing the driven head portion 70 against the wire bundle 23. Then, by moving the link base plate 60 toward the traveling side X1 in this restricted state, the driven head portion 70 can be easily rotated about the axis L. That is, the driven head portion 70 can be rotated by the simple operation of pressing the driven head portion 70 against the wire bundle 23 and driving the link base plate 60 toward the traveling side X1. Furthermore, with this configuration, the wire bundle 23 can be used to position the driven head portion 70 and as a fulcrum for the rotation of the driven head portion 70, and therefore the link mechanism 80 can be simply configured with the first link 81 and the auxiliary link 86. This allows for reduced manufacturing and operating costs compared to winding devices 1 that have, for example, a complex link structure that allows the driven head portion 70 to rotate regardless of whether or not there is a wire bundle 23, or a structure that precisely controls the position and rotation angle of the driven head portion 70 using a motor or the like.

[0038] Furthermore, with the above configuration, when the link base plate 60 moves forward or backward, the first protrusion 85 of the driven head 70 is guided by the link groove 82 to the forward side X1 or the backward side X2. At this time, the shape of the first inclined groove 83 of the link base plate 60 allows the inner wall surface 83a to press against the first protrusion 85 of the driven head 70, generating a moment about the axis L and causing the driven head 70 to rotate about the axis L. Then, by guiding the first protrusion 85 with the inner wall surface 83a, the distance between the first protrusion 85 and the axis L in the width direction Y gradually increases, allowing the driven head 70 to rotate further. Furthermore, with the shape of the second inclined groove 84, the inner wall surface 84a to press against the first protrusion 85, causing the driven head 70 to rotate about the axis L. Then, by guiding the first protrusion 85 along the inner wall surface 84a, the distance between the axis L of the first protrusion 85 and the width direction Y is gradually reduced, and the driven head portion 70 can be pressed toward the side of the electric wire bundle 23. With this configuration, the roll tape R can be attached accurately and reliably to the outer peripheral surface of the electric wire bundle 23.

[0039] Furthermore, according to the above configuration, the auxiliary link 86 can stably support the driven head portion 70, thereby stabilizing the operation of the driven head portion 70 and improving the durability of the winding device 1.

[0040] Furthermore, according to the above configuration, the shape absorbing portion 73 (curved portion) of the driven head portion 70 ensures a contact area between the applicator 72 and the electric wire bundle 23 in accordance with electric wire bundles 23 of various diameters, thereby enabling the electric wire bundle 23 to be securely held. Furthermore, the pressing portion 74 of the driven head portion 70 can press the roll tape R that is not attached to the electric wire bundle 23 against the outer circumferential surface of the electric wire bundle 23. Therefore, the shape absorbing portion 73 and the pressing portion 74 enable the roll tape R to be attached even more reliably.

[0041] Furthermore, according to the above configuration, by rotating the driven head portion 70 by more than 90° around the axis L, the rotation angle of the driven head portion 70 is sufficiently secured, and a winding device 1 with high performance for applying the roll tape R can be constructed.

[0042] Furthermore, according to the above configuration, the wire harness production apparatus 100 can be configured using the winding device 1 that can easily apply the roll tape R to the electric wire bundle 23.

[0043] The above-described embodiments merely illustrate typical aspects of the present invention, and the present invention is not limited thereto. For example, in the present embodiment, two electric wires 20 are prepared assuming that the wire harness WH is used in a DC circuit. However, three or more electric wires 20 may be prepared depending on the application, such as when the wire harness WH is used in an AC circuit. Alternatively, a single electric wire 20 may be used, in which case, only one electric wire 20 is to be covered. In the present embodiment, the link mechanism 80 is configured to rotate the driven head portion 70 in the right direction a when the piston rod 58 is displaced toward the travel side X1. However, for example, if the winding direction of the roll tape R is opposite to that of the present embodiment, the link mechanism 80 (the link base plate 60, the driven head portion 70, etc.) may be configured to be symmetrical to that of the present embodiment. As a result, the driven head portion 70 may rotate in the left direction b when the piston rod 58 is displaced toward the travel side X1.

[0044] Furthermore, in this embodiment, the object to be covered is the electric wire 20, but the winding device 1 can also be used when wrapping a covering material around a member having an axis extending in a predetermined direction, not limited to the electric wire 20. In this case, the covering material is not necessarily limited to the roll tape R. Furthermore, in this embodiment, the link mechanism 80 is used as the rotating part, but this is merely an example, and a structure other than the link mechanism 80 may also be used as the rotating part. For example, by using a drive mechanism such as a motor, the driven head part 70 may be rotated about the axis L as the link base plate 60 moves forward and backward. [Explanation of symbols]

[0045] L axis R Roll tape (covering material) X Front and back direction (cross direction) Z Vertical direction (axial direction) 1 Wrapping device 20 Electric wire (covered) 23 Electric wire bundle (covered) 60 Link base plate (base part) 70 Follower head part 80 Link mechanism (rotating part)

Claims

1. A winding device that winds a coating material around a coating target having an axis extending in a predetermined direction, a base portion that moves back and forth in a direction intersecting the axis; a driven head portion that sandwiches the covering member between itself and the outer peripheral surface of the object to be covered and attaches it; a rotation unit that rotates the driven head unit around the axis in accordance with the advancement and retreat of the base unit, the driven head portion is provided so as to be able to be pressed against the object to be coated toward a traveling side in the intersecting direction, and in a pressed state, displacement toward the traveling side is restricted; the rotating unit is a link mechanism that connects the base unit and the driven head unit and converts the forward and backward movement of the base unit into the rotation of the driven head unit, When the base portion is moved to the forward direction while the displacement of the driven head portion is restricted, the link mechanism rotates the driven head portion around the axis while pressing the driven head portion against the object to be coated, the object to be covered is an electric wire, the base portion and the driven head portion are provided to extend in the intersecting direction and in a width direction intersecting the intersecting direction when viewed from the axial direction of the electric wire, the link mechanism includes a first protrusion protruding from the driven head portion in the axial direction, and a link groove provided in the base portion, opening in the axial direction and accommodating the first protrusion, The first protrusion is provided to be spaced apart from the axis in the width direction, the link groove includes a first inclined groove positioned on one side in the width direction as it extends toward the retraction side in the intersecting direction, and a second inclined groove continuous with the first inclined groove and positioned on the other side in the width direction as it extends toward the retraction side, A winding device characterized in that as the base portion moves toward the forward direction, the first protrusion is guided from the first inclined groove to the second inclined groove, causing the driven head portion to rotate around the axis while being pressed against the outer peripheral surface of the electric wire.

2. A winding device that winds a coating material around a coating target having an axis extending in a predetermined direction, a base portion that moves back and forth in a direction intersecting the axis; a driven head portion that sandwiches the covering member between itself and the outer peripheral surface of the object to be covered and attaches it; a rotation unit that rotates the driven head unit around the axis in accordance with the advancement and retreat of the base unit, the driven head portion is provided so as to be able to be pressed against the object to be coated toward a traveling side in the intersecting direction, and in a pressed state, displacement toward the traveling side is restricted; the rotating unit is a link mechanism that connects the base unit and the driven head unit and converts the forward and backward movement of the base unit into the rotation of the driven head unit, When the base portion is moved to the forward direction while the displacement of the driven head portion is restricted, the link mechanism rotates the driven head portion around the axis while pressing the driven head portion against the object to be coated, the link mechanism includes an auxiliary link that supports the driven head portion; the auxiliary link includes a support shaft that penetrates the driven head portion in the axial direction of the object to be coated and rotatably supports the driven head portion, a second protrusion that protrudes from the base portion in the axial direction, and a connection plate that connects the support shaft and the second protrusion and rotates around the support shaft, the connecting plate is provided with a guide groove that extends in a direction from the support shaft side toward the second protrusion side and accommodates the second protrusion; The winding device is characterized in that the second protrusion is guided by the guide groove to move relatively close to or away from the support shaft.

3. 2. The winding device according to claim 1, wherein the driven head portion includes: a curved portion that extends along the outer peripheral surface of the object to be coated and holds the object to be coated; and a pressing portion that is provided contiguous with the curved portion and presses the covering member that is not attached to the object to be coated toward the object to be coated.

4. The winding device according to claim 1 , wherein the rotating portion rotates the driven head portion by more than 90° about the axis.

5. A wire harness manufacturing apparatus comprising the winding device according to any one of claims 1 to 4.

Images