JP2017143641A - Protective member mounting jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective-member mounting jig having a new structure, which allows the upper end part of a pair of side walls to be inserted, by a simple operation, between slits in a protective member covering an electric wire such as a corrugated tube.SOLUTION: At an upper end part 18 of a pair of side wall parts 12, a protective-member diameter-increase part 38 of tapering cylindrical shape, projecting outwards in the direction of extension of the upper end part 18 from an upper end part 24, is provided while the upper end parts 18 are abutting on each other at the upper end part 24 in the direction of inclination. A radial dimension of the projecting leading-end part of the protective-member diameter-increase part 38 is made smaller than an inside diameter of a protective member (twist tube) 30. Meanwhile, the radial maximum dimension of the protective-member diameter-increase part 38 is larger than an inside diameter thereof while the respective end faces of the slits 32 in the protective member 30 are abutting on each other.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a protective member mounting jig used for covering a wire bundle with a protective member when manufacturing a wire harness.

  2. Description of the Related Art Conventionally, a wire harness routed in an automobile or the like has a structure in which a predetermined portion of a wire bundle in which a number of wires are appropriately bundled is covered with a protective member such as a corrugated tube. And this wire harness is being fixed via fixing members, such as a binding band which has a clip part, in the some fixing point provided in the suitable place in a motor vehicle.

  By the way, protective members, such as a corrugated tube, are set as the structure where the slit for electric wire bundle insertion extended and provided in the longitudinal direction. Therefore, the protective member can be easily extrapolated to the electric wire bundle by inserting the electric wire bundle from the slit, and since the protective member is excellent in flexibility, the wiring according to the layout can be performed freely. It can be done.

  However, conventionally, when manufacturing such a wire harness, an operator manually performs a work of inserting a predetermined portion of a wire bundle in which a number of wires are appropriately bundled from a slit. For this reason, it is necessary to put together a wire bundle in which a large number of wires are appropriately bundled in a state where the slit is spread with both hands so as not to be separated and inserted into a protective member such as a corrugated tube. Since such work is difficult and time-consuming, there is a problem that work efficiency is poor. In addition, there is a risk of hurting hands when such work is performed for a long time.

  Therefore, various protective member mounting jigs have been proposed to facilitate the work. For example, the protective member mounting jig shown in FIG. 1A of JP-A-7-245840 (Patent Document 1) is that. Such a protective member mounting jig has a shape in which a single plate material is bent in a substantially U shape, and the upper ends of a pair of opposing side wall portions are inclined with respect to the bottom wall portion. At the same time, flanges extending outward are formed at the upper ends of the pair of side walls. By using such a protective member mounting jig, it is possible to manufacture a wire harness with a simple operation and with high work efficiency. More specifically, first, as shown in FIG. 1A of Patent Document 1, an electric wire bundle is placed on the bottom wall portion of the protective member mounting jig. Next, as shown in FIG. 1B of Patent Document 1, the protective member mounting jig is gripped with one hand so that the portion of the upper end of the pair of side wall portions that is farthest from the wire bundle contacts. Applying force, the end of the slit of a protective member such as a corrugated tube held by the other hand is pushed into the contact portion of the protective member mounting jig while maintaining this state. Subsequently, by further pressing the protective member along the upper end portions of the pair of side wall portions, the slit portion of the protective member is gradually pushed and widened by the pair of flange portions that are gradually separated in the pressing direction. . Finally, as shown in FIG. 2B of Patent Document 1, an electric wire bundle is inserted through a slit that has been sufficiently expanded by the flange portion. With such a simple operation, it is possible to manufacture a wire harness with high work efficiency.

  However, since the slit portion of the protective member may overlap in the circumferential direction due to manufacturing variations of the protective member and the structure of the protective member, the slit portion is pushed into the contact portion of the protective member mounting jig. It is difficult to insert the contact portion of the protective member mounting jig between the slits only by this simple operation, and it cannot be said that it is a sufficiently desirable measure.

JP 7-245840 A

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is to insert the upper end portions of the pair of side wall portions between the slits of a protective member such as a corrugated tube with a simple operation. An object of the present invention is to provide a protective member mounting jig having a novel structure.

  A first aspect of the present invention is used to extrapolate a protective member having an expandable slit in an axial direction to a wire bundle, and includes a pair of opposing side wall portions and the pair of side walls. Each of the pair of side wall portions is inclined with respect to the bottom wall portion, and each of the pair of side wall portions is inclined with respect to the bottom wall portion. In the protective member mounting jig in which a flange portion projecting outward in the opposite direction is provided on the upper end portion, the upper end portion of the pair of side wall portions has an upper end portion in the inclined direction, In a state where the upper end portions are in contact with each other, a tapered member-shaped protective member enlarged diameter portion that protrudes outward in the extending direction of the upper end portion from the upper side end portion is provided, The radial dimension of the protruding tip of the protective member enlarged diameter portion is within the protective member. While being smaller than, characterized in that it is larger than the inner diameter of a state where the radial maximum dimension of the protective member enlarged diameter portion is abutted to the end faces of the slit of the protective member.

  According to this aspect, the tapered member-shaped protective member widened portion protrudes from the upper end portion in the inclined direction of the pair of side wall portions in a state where the upper end portions of the pair of side wall portions are in contact with each other. It is designed to be provided. In addition, the protective member diameter-enlarged portion is a protective member in a state in which the radial dimension of the projecting tip is smaller than the inner diameter of the protective member and the maximum radial dimension is in contact with the end surfaces of the slits of the protective member It is formed to be larger than the inner diameter. Thereby, even when the slit of the protective member overlaps in the circumferential direction, the slit of the protective member is opened only by a simple operation of inserting the protective member from the protruding tip of the protective member enlarged diameter portion. State. As a result, the upper ends of the pair of side wall portions of the protective member mounting jig can be easily inserted between the slits, and the protective member can be attached to the wire harness more easily than the conventional protective member mounting jig. It can be carried out.

  In addition, even when the slit portion of the protective member is overlapped in the circumferential direction, a wire harness can be manufactured with a simple operation with good work efficiency. By using the protective member mounting jig of the present invention for the protective member having the property, the mounting work to the wire harness can be performed efficiently.

  A second aspect of the present invention is the cone according to the first aspect, wherein the protective member diameter-enlarged portion protrudes from the upper side end portion of the upper end portion of the pair of side wall portions. It is composed of trapezoidal halves.

  According to this aspect, since the protective member enlarged-diameter portion is configured by the truncated cone-shaped halved body, the upper side of the upper ends of the pair of side walls is brought into contact with each other by contacting the upper ends of the pair of side walls. A frustoconical protective member diameter-enlarged portion can be advantageously projected at the end. In addition, since the diameter of the slit portion of the protective member can be increased more smoothly by the frustum-shaped protective member diameter-enlarged portion, the workability can be further improved.

  According to the present invention, the upper end portion in the inclined direction of the pair of side wall portions is provided with the tapered member-shaped protective member widened portion protruding in a state where the upper end portions of the pair of side wall portions are in contact with each other. Yes. In addition, the protective member diameter-enlarged portion has an inner diameter of the protective member in a state where the radial dimension of the protruding tip is smaller than the inner diameter of the protective member and the maximum radial dimension is in contact with the slit end faces of the protective member. Has been bigger than. Therefore, even if the slits of the protective member overlap in the circumferential direction, the slit of the protective member is opened by a simple operation of inserting the protective member from the projecting tip of the enlarged diameter portion of the protective member. Can do. Therefore, the protection member can be attached to the wire harness more easily than the conventional protection member attachment jig. In addition, even if the slit portion of the protective member overlaps in the circumferential direction, the wire harness can be manufactured with a simple operation with high work efficiency. By using the tool, it can be efficiently attached to the wire harness.

The perspective view of the protection member attachment jig as one Embodiment of this invention. Sectional drawing of the protection member which performs attachment work to an electric wire bundle using the protection member attachment jig | tool of this embodiment ((a) free state, (b) state which expanded the slit and contacted end surfaces) . The perspective view which shows the work process of the first half which coat | covers an electric wire bundle with a protection member using the protection member attachment jig | tool of this embodiment. The principal part enlarged view of the VV cross section in FIG. FIG. 4 is an enlarged view of the bottom surface of the protective member enlarged diameter portion in FIG. 3. The perspective view which shows the work process of the latter half which coat | covers an electric wire bundle with a protection member using the protection member attachment jig | tool of this embodiment. The enlarged view of the VII-VII cross section in FIG. The enlarged view of the VIII-VIII cross section in FIG. The perspective view which shows the other aspect of the protection member attachment jig | tool as this embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 shows a protective member mounting jig 10 as an embodiment of the present invention. The protective member mounting jig 10 is used for extrapolating a twist tube 30 as a protective member, which will be described later, to the wire bundle 36, and has a shape obtained by bending a single plate material into a substantially U shape. For example, it is integrally formed by injection molding or the like with a synthetic resin such as polypropylene (PP) or polyamide (PA). More specifically, the protective member mounting jig 10 includes a pair of opposing side wall portions 12 and 12 and a bottom wall portion 16 that connects the lower end portions 14 of the pair of side wall portions 12 and 12. The pair of side wall portions 12 and 12 can be bent and deformed in opposite directions. In the following description, “upper” means the positive direction of the z axis in FIG. 1, “lower” means the negative direction of the z axis in FIG. 1, and “forward” means the negative direction of the x axis in FIG. The direction and the rear mean the positive direction of the x-axis in FIG.

  Each of the pair of side wall portions 12 and 12 has a substantially right triangle shape in a side view, and each upper end portion 18 is formed so as to be inclined with respect to the bottom wall portion 16, and the upper end portion 18. A flange portion 22 is provided that protrudes outward in a direction (y-axis direction in FIG. 1) opposite to a portion excluding the lower end portion 20 in the inclined direction. In addition, the upper side ends 24 in the inclined direction of the pair of side wall portions 12 and 12 respectively have substantially truncated cone-shaped halves protruding from the upper side end portion 24 outward in the extending direction of the upper end portion 18. 26 is provided. Each of the halves 26 is formed so as to open toward the extending direction of the upper end 18 and the inward direction of the pair of side walls 12, 12. Further, at the upper side end 24 in the inclined direction of the pair of side wall parts 12, 12, the extension extending from the base end part of the halved body 26 toward the inner side in the extending direction of the upper end part 18 with substantially the same cross-sectional shape. The protruding portion 27 is formed integrally with the flange portion 22. With this configuration, the strength of the half body 26 is advantageously ensured. In addition, a substantially circular through-hole 28 is formed through each of the upper side end portions 24 in the inclined direction of the pair of side wall portions 12 and 12 in a side view. As a result, the work of abutting the upper end portions 18 of the upper side end portion 24, which will be described later, can be easily performed with a small force, and the synthetic resin in the through-hole 28 portion can be saved, thereby advantageously reducing the cost. It can be planned.

  The twist tube 30 serving as a protective member has a substantially cylindrical shape that opens in both axial directions, and is provided with an expandable slit 32 in the axial direction. The twist tube 30 is a slit portion 34a which is a winding start end and a winding end end by winding a flexible resin sheet made of woven fabric made of polyethylene terephthalate (PET) or the like in the circumferential direction. The slit portions 34b have a so-called “cell flapping property” in which the slit portions 34b overlap each other in the radial direction, and the winding state as shown in FIG. 2A is maintained in a free state. The twist tube 30 has an inner diameter R1 in a free state (see FIG. 2A), while the inner diameter in a state where the end faces 32a and 32b of the slit 32 are in contact with each other is R2 (see FIG. 2). 2 (b)). Since the twist tube 30 having such a structure is thin and has flexibility, it can cope with the bending form of the wire bundle 36 to be extrapolated later, and has “cell flapping properties”. The possibility that the bent wire bundle 36 jumps out of the slit 32 can be advantageously prevented. In addition, as the twist tube 30, for example, a twist tube 2473 manufactured by Federal Mogul System Protection Co., Ltd. can be employed.

  By using the protective member mounting jig 10 of this embodiment having such a structure, as shown in FIGS. 3 to 8, the twist tube 30, which is a protective member, is extrapolated to the wire bundle 36 to be described later. The wire harness 40 to be manufactured can be manufactured. In order to facilitate understanding, the twist tube 30 is described in FIGS. 3 and 6, and the wire bundle 36 is illustrated in phantom lines in FIGS. 7 to 8. More specifically, after the electric wire bundle 36 is inserted and mounted on the bottom wall portion 16 of the protective member mounting jig 10, the protective member mounting jig 10 is gripped with one hand and the pair of side wall portions 12, 12 A force is applied so that the upper end portions 18 of the upper end portion 24 in the inclined direction come into contact with each other. As a result, the upper side ends 24 of the pair of side wall portions 12 and 12 are combined with the substantially truncated cone-shaped halves 26 that protrude from the upper side end 24 toward the outside in the extending direction of the upper end 18. As a result, a substantially truncated cone-shaped protective member enlarged-diameter portion 38 is formed. While maintaining this state, the twist tube 30 grasped by the other hand with respect to the protective member enlarged-diameter portion 38 from the rear (in the positive direction of the x axis in FIG. 3) with the slit 32 facing downward. Insert. Here, as shown in FIG. 4, the radial dimension: L1 of the protruding tip of the protection member enlarged diameter portion 38 is formed to be smaller than the free inner diameter: R1 of the twist tube 30. . As a result, the twist tube 30 can be easily inserted into the protruding tip of the protective member enlarged diameter portion 38. Further, the maximum dimension L2 in the radial direction of the protective member enlarged diameter portion 38 is formed to be larger than the inner diameter R2 in a state where the end faces 32a and 32b of the slit 32 of the twist tube 30 are in contact with each other. As a result, as shown in FIGS. 3 to 5, when the twist tube 30 is inserted from the rear and further pushed in, the inner diameter of the twist tube 30 gradually increases, and the twist tube 30 becomes a pair of side walls. The slit 32 of the twist tube 30 is expanded before reaching the upper end 24 of the portions 12 and 12 (see FIG. 5). Therefore, the slit 32 of the twist tube 30 can be easily inserted into the upper end portions 24 of the pair of side wall portions 12 and 12.

  Subsequently, by further pushing the twist tube 30 along the extending direction of the upper end portions 18 of the pair of side wall portions 12, 12, the slit 32 of the twist tube 30 is formed as shown in FIGS. It is further expanded and expanded to a size sufficient to be extrapolated to the wire bundle 36. Finally, as shown in FIG. 8, the wire bundle 36 is extrapolated and covered with the twist tube 30 to complete the manufacturing work of the wire harness 40. Note that the flange portion 22 is not provided at the lower end portion 20 in the inclined direction of the upper end portion 18 because the slit 32 of the twist tube 30 is excessively widened and the twist tube 30 is detached from the protective member mounting jig 10. This is to advantageously prevent this.

  According to the protective member mounting jig 10 of this embodiment having such a structure, the protective member mounting jig 10 is gripped with one hand, and the upper side ends in the inclined direction of the pair of side wall portions 12 and 12 are used. A force is applied so that the upper end portions 18 of the 24 come into contact with each other. As a result, the upper side ends 24 of the pair of side wall portions 12 and 12 are combined with the substantially truncated cone-shaped halves 26 that protrude from the upper side end 24 toward the outside in the extending direction of the upper end 18. As a result, a substantially truncated cone-shaped protective member enlarged portion 38 is formed. The radial dimension: L1 of the protruding tip of the protective member enlarged diameter portion 38 is formed to be smaller than the inner diameter R1 of the free state of the twist tube 30 as the protective member, and the protective member enlarged portion 38 The maximum radial dimension L2 is formed to be larger than the inner diameter R2 in a state where the end faces 32a and 32b of the slit 32 of the twist tube 30 are in contact with each other. Therefore, even when the slit portions 34a and 34b such as the twist tube 30 overlap in the circumferential direction, the twist tube 30 can be easily inserted from the protruding tip end portion of the protective member enlarged diameter portion 38, and Further, the slit 32 of the twist tube 30 can be expanded before the twist tube 30 reaches the upper end 24 of the pair of side wall portions 12 and 12 only by a simple operation of pushing in. As a result, since the upper end portions 18 of the pair of side wall portions 12 and 12 of the protective member mounting jig 10 can be easily inserted between the slits 32, the electric wires can be more easily formed than the conventional protective member mounting jig. The operation of attaching the twist tube 30 to the bundle 36 can be performed. In addition, since the protective member enlarged-diameter portion 38 has a truncated cone shape, the inner diameter of the twist tube 30 can be increased more smoothly, so that the workability can be further improved.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited at all by the specific description in this embodiment. For example, in the present embodiment, the protective member enlarged-diameter portion 38 has a truncated cone shape, but is not limited to the one having a circular cross-sectional shape and protruding in a tapered shape. For example, a hollow or solid shape projecting in a tapered shape with an arbitrary cross-sectional shape such as an elliptical cross-sectional shape or a star-shaped cross-sectional shape may be employed. Further, in the present embodiment, the radial dimension of the protective member enlarged diameter portion 38 is the diameter dimension of a circle. The maximum dimension shall be indicated. Furthermore, in this embodiment, the place of the radial direction maximum dimension: L2 of the protective member enlarged diameter portion 38 is the proximal end portion of the protective member enlarged diameter portion 38, but a place other than the proximal end portion while maintaining the tapered shape. May be. In addition, in the present embodiment, the protective member diameter-expanded portion 38 is configured by a combination with the halved body 26 protruding from the upper side end portion 24 of the pair of side wall portions 12, 12, but is shown in FIG. 9. Thus, it may be comprised from the protective member enlarged diameter part 38 formed only in one side of the upper side edge part 24 of a pair of side wall parts 12 and 12. FIG. Moreover, although the twist tube 30 was illustrated and demonstrated as a protective member, of course, it can use also with respect to the arbitrary protective members in which the slit 32 which can be expanded, such as a corrugated tube, is provided in the axial direction.

10: protective member mounting jig, 12: side wall, 14: lower end, 16: bottom wall, 18: upper end, 22: flange, 24: upper end, 26: half, 30: twist Tube (protective member), 32: slit, 32a, b: end face, 36: wire bundle, 38: protective member diameter-enlarged portion

Claims (2)

It is used for extrapolating a protective member provided with an expandable slit in the axial direction to a wire bundle, and has a pair of opposing side wall portions and respective lower end portions of the pair of side wall portions. Each of the pair of side wall portions is inclined with respect to the bottom wall portion, and the upper end portions of the pair of side wall portions are arranged in the direction opposite to each other. In the protective member mounting jig provided with a flange portion protruding toward the direction,
The upper end portions of the pair of side wall portions are outward from the upper end portion in the extending direction of the upper end portion in a state where the upper end portions are in contact with each other at the upper end portion in the inclined direction. A protruding tapered member-shaped protective member diameter-enlarged portion is provided,
While the radial dimension of the protruding tip of the protective member enlarged diameter portion is made smaller than the inner diameter of the protective member, the maximum radial dimension of the protective member enlarged diameter portion is defined between the end faces of the slits of the protective member. A protective member mounting jig, wherein the protective member mounting jig is made larger than an inner diameter in a contact state.   2. The protective member mounting jig according to claim 1, wherein the diameter-enlarging portion of the protective member is configured by a truncated cone-shaped halved body projecting from each of the upper end portions of the upper end portions of the pair of side wall portions. Ingredients.

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