JP6748763B1 - Clamp body, connector unit, and connector unit with electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a coated electric wire from rotating and twisting relative to a clamp body while holding the coated electric wire. SOLUTION: A clamp body that holds a covered electric wire in a state of being attached to a mounting component has an annular base and a holding portion that holds the coated electric wire inserted in the base. A plurality of extension portions extending from the base portion in the central axial direction of the base portion are provided side by side in the holding portion along the circumferential direction of the base portion, and the plurality of extension portions surround the covered electric wire inserted in the base portion. It extends from the base in a state where it can be elastically displaced so that adjacent extending portions come into contact with each other in the circumferential direction. The holding portion has a first surface provided by the tip end portion of the extending portion and a second surface provided by the tip end portion of the extending portion at a position different from the first surface in the circumferential direction. In a state where adjacent extending portions are in contact with each other, the first surface presses the outer peripheral surface of the coated electric wire, and the second surface is located radially outside the first surface. [Selection diagram] Fig. 11

Description

The present invention relates to a clamp body, and more particularly to a clamp body that holds a covered electric wire connected to a connector in a state of being attached to a predetermined component.
The present invention also relates to a connector unit having a clamp body and a connector unit with an electric wire.

It is already known to use a retaining clamp body to hold a covered electric wire connected to a connector in a state where it is attached to a predetermined component. Examples of the clamp body include the retaining member 100 described in Patent Document 1 and the cable clamp 200 described in Patent Document 2.

As shown in FIG. 35, the retaining member 100 includes a ring-shaped member 101 and a plurality of pillar members 102. The pillar member 102 extends in the vertical direction from the peripheral edge of the ring-shaped member 101, and a convex portion 103 is provided on the inner surface side near the tip of the pillar member 102. With such a structure, the convex portion 103 bites into the cable 104 inserted inside the ring-shaped member 101, and it is possible to prevent the cable 104 from coming off. Further, as shown in FIG. 36, when the cable 104 is passed through the tubular cover body 105 and then the cover body 105 is fitted to the connector body (not shown), the inner peripheral surface of the cover body 105 penetrates the cable body for penetration. Since it narrows toward the hole, the vicinity of the convex portion 103 of the retaining member 100 is elastically displaced so as to be narrowed, and the convex portion 103 bites into the cable 104 sufficiently.

The cable clamp 200 has a cylindrical shape as shown in FIG. 37, and holds the cable inserted therein. More specifically, the cable clamp 200 is provided with a plurality of bent comb blades 201, as shown in FIG. 37. The bent portion of each comb blade 201 is pushed to the cable side by the inner peripheral surface of the clamp nut when the cable clamp 200 is fitted into the clamp nut (not shown). Since the slits are formed between the comb blades 201, each comb blade 201 is elastically displaced by being pressed by the clamp nut, and the tip protrusion 202 provided at the tip of the comb blade 201 bites into the cable.

JP, 2009-259419, A JP, 2008-186670, A

However, in the retaining member 100 described in Patent Document 1, since the column member 102 has a relatively thin shape as shown in FIG. 35, the column member 102 is twisted with respect to the cable 104 held by the retaining member 100. If a force is applied, the column member 102 may rotate and twist together with the cable 104.

Further, in the cable clamp 200 described in Patent Document 2, the comb blades 201 are in close contact with each other when the comb blades 201 are pressed by the clamp nut and elastically displaced. In this case, even if a twisting force acts on the cable, the twisting deformation of each comb blade 201 is restricted by the comb blades 201 arranged on both sides thereof. However, in the above-described cable clamp 200, the contact surface of the tip protrusion 202 of the comb blade 201 with the cable is a flat surface, so that when a twisting force acts on the cable, the cable is relatively moved with respect to the cable clamp 200. It may rotate. As a result, a load may be generated at the connecting portion between the cable and the connector, which may cause the cable to break.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and prevents the coated electric wire from rotating and twisting relative to the clamp body in a state where the coated electric wire is held. An object is to provide a clamp body that can be suppressed.
Another object of the present invention is to provide a connector unit including the above clamp body and a connector unit with an electric wire.

In order to achieve the above-mentioned object, the clamp body of the present invention is a clamp body for holding a covered electric wire connected to a connector in a state of being attached to a mounting component, which is an annular shape into which the covered electric wire is inserted. It has a base portion and a holding portion for holding the covered electric wire inserted into the base portion, and the holding portion has a plurality of extending portions extending from the base portion in the central axis direction of the base portion along the circumferential direction of the base portion. Are provided side by side, the plurality of extending portions surrounds the covered electric wire inserted in the base portion, and extends from the base portion in a state in which the extending portions adjacent to each other in the circumferential direction are elastically displaceable so as to contact each other, The holding portion has a first surface provided on the distal end portion of the extending portion and a second surface provided on the distal end portion of the extending portion at a position different from the first surface in the circumferential direction, and is adjacent to each other in the circumferential direction. In a state where the extending portions are in contact with each other, the first surface presses the outer peripheral surface of the covered electric wire, and the second surface is located outside the first surface in the radial direction of the base portion. ..

Further, in the clamp body of the present invention, each of the distal end portions of the plurality of extending portions has a first surface at an inner end position in the radial direction, and a second surface at a position different from the first surface in the circumferential direction. It is preferable to have a face.

Further, in the clamp body of the present invention, each tip of the plurality of extending portions has a protruding portion that protrudes inward in the radial direction, and the first surface is provided on the inner end surface in the radial direction of the protruding portion. And the second surface is preferably present.

Further, in the clamp body of the present invention, a part of an inner end in the radial direction of the protrusion is cut out, and the second surface is a notched part in the inner end in the radial direction of the protrusion. Is preferably present.

Further, in the clamp body of the present invention, the corner portion of the inner end in the radial direction of the protrusion is cut out, and the second surface is notched at the inner end in the radial direction of the protrusion. It is preferably present in the corner portion.

Further, in the clamp body of the present invention, a connecting surface that connects the first surface and the second surface is further present on the inner end surface in the radial direction of the protrusion, and the length of the first surface in the circumferential direction. Is preferably longer than the sum of the length of the second surface in the circumferential direction and the length of the connecting surface in the circumferential direction.

Further, in the clamp body of the present invention, the length of the connecting surface in the radial direction is preferably equal to or longer than the length of the second surface in the circumferential direction.

Further, in the clamp body of the present invention, it is preferable that the respective extending portions have the same shape.

Further, in the clamp body of the present invention, each tip of the plurality of extending portions has a protruding portion that protrudes toward the inner side in the radial direction, and between the extending portions that are adjacent to each other in the circumferential direction, the radial direction is increased. The protrusions have different lengths, and of the extending portions adjacent to each other in the circumferential direction, the extending end portion having the longer radial length has the first end surface inside the protruding portion in the radial direction. The end surface on the inner side of the protrusion in the radial direction of the extending portion having a shorter length in the radial direction may be the second surface.

Further, in the clamp body of the present invention, it is preferable that the plurality of extending portions are elastically displaced so that the extending portions that are adjacent to each other in the circumferential direction come into contact with each other at the circumferential end faces of the projecting portions.

Further, in the present invention, it is preferable that the base portion is provided with a fitting portion that can be fitted to the fitted portion provided in the attachment component.

Further, the connector unit of the present invention includes any one of the clamp bodies described above, a connector, a case as a mounting part for accommodating the connector inside, and a coated electric wire connected to the connector outside the case. Fastening for fitting the wire lead-out portion provided on the case for pulling out and the clamp body to elastically displace the plurality of extension portions, and for being assembled to the wire lead-out portion to fasten the clamp body and the wire lead-out portion And a member.

Further, in the connector unit of the present invention, the fastening member is a ground nut, and the inner peripheral surface of the portion of the ground nut that is assembled to the wire drawing portion meshes with the thread formed on the outer peripheral surface of the wire drawing portion. It has a thread forming surface with threads, and the inner peripheral surface of the part of the gland nut that fits into the clamp body is a tapered surface where the inner diameter of the gland nut becomes smaller as it gets farther from the thread forming surface. It is preferable that the tapered surface presses each of the plurality of extending portions inward in the radial direction and elastically displaces when the ground nut is tightened in the wire drawing portion.

Further, in the connector unit of the present invention, in both the gap between the outer peripheral surface of the coated electric wire and the inner peripheral surface of the wire drawing portion in the radial direction, and in the gap between the outer peripheral surface of the coated electric wire and the inner peripheral surface of the base portion. It is preferable to further have a tubular waterproof member to be arranged.

Moreover, the connector unit with an electric wire of the present invention includes any one of the connector units described above and a covered electric wire.

According to the present invention, in the state in which the clamp body holds the covered electric wire, each of the plurality of extending portions of the holding portion of the clamp body is elastically displaced, and the extending portions adjacent to each other in the circumferential direction are in contact with each other. Thereby, it is possible to prevent the extension portion itself from being twisted together with the cable.
In addition, at least a part of the extended portion has a first surface provided at the radially inner end position, presses the outer peripheral surface of the coated electric wire, and at least a portion of the extended portion has a distal end in the circumferential direction. The second surface provided at a position different from the first surface is located radially outside the first surface. That is, the presence of the first surface and the second surface that are different in position in the radial direction from each other provides a recess in the range in which the second surface is located in the circumferential direction. Then, a part of the outer peripheral portion (that is, the covered portion) of the covered electric wire protrudes (enters) into the recess, and the portion that enters the recess regulates the relative rotation of the covered electric wire with respect to the clamp body. .. This makes it possible to suppress twisting of the coated electric wire and disconnection due to this.

It is an exploded device figure of the connector unit with an electric wire of the present invention. It is a top view in the state before the ground nut is tightened of the connector unit with an electric wire of the present invention. It is a side view in the state before the ground nut is tightened of the connector unit with an electric wire of the present invention. It is a figure which shows the cross section which cut|disconnected the connector unit with an electric wire of this invention in the end surface position of a gland nut, and has shown the state before tightening a gland nut. It is the figure which looked at the connector unit with an electric wire shown in FIG. 2 from the AA cross section. FIG. 5 is a detailed view around the covered electric wire in FIG. 4. It is a top view in the state where the gland nut was tightened of the connector unit with an electric wire of the present invention. It is a side view in the state where the gland nut was tightened of the connector unit with an electric wire of the present invention. It is a figure which shows the cross section which cut|disconnected the connector unit with an electric wire of this invention in the end surface position of a gland nut, and has shown the state where the gland nut was tightened. It is the figure which looked at the connector unit with an electric wire shown in FIG. 7 from the BB cross section. FIG. 10 is a detailed view around the covered electric wire in FIG. 9. It is a perspective view before the deformation of the clamp body concerning the first example of the present invention. It is a side view before the deformation of the clamp body concerning the first example of the present invention. It is a front view before the deformation of the clamp body concerning the first example of the present invention. It is a perspective view after the deformation of the clamp body concerning the first example of the present invention. It is a side view after the deformation of the clamp body concerning the first example of the present invention. It is a front view after the deformation of the clamp body concerning the first example of the present invention. It is a figure which shows the state which the clamp body of a prior art example is holding the cable. It is a perspective view before the deformation of the clamp body concerning the second example of the present invention. It is a front view before the deformation of the clamp body concerning the second example of the present invention. It is a perspective view after the deformation of the clamp body concerning the second example of the present invention. It is a front view after the deformation|transformation of the clamp body which concerns on the 2nd example of this invention. It is a figure which shows the cross section which cut|disconnected the connector unit with an electric wire with which the clamp body which concerns on a 2nd example was assembled|attached at the end surface position of a gland nut, and has shown the state before a gland nut is tightened. FIG. 24 is a detailed view around the covered electric wire in FIG. 23. It is a figure which shows the cross section which cut|disconnected the connector unit with an electric wire with which the clamp body which concerns on a 2nd example was assembled|attached at the end surface position of a gland nut, and has shown the state where the gland nut was tightened. FIG. 26 is a detailed view around the covered electric wire in FIG. 25. It is a perspective view before the deformation of the clamp body concerning the third example of the present invention. It is a front view before the deformation of the clamp body concerning the third example of the present invention. It is a perspective view after the deformation of the clamp body concerning the third example of the present invention. It is a front view after the deformation of the clamp body concerning the third example of the present invention. It is a figure which shows the cross section which cut|disconnected the connector unit with an electric wire with which the clamp body which concerns on a 3rd example was assembled in the end surface position of a gland nut, and has shown the state before a gland nut is tightened. FIG. 32 is a detailed view around the covered electric wire in FIG. 31. It is a figure which shows the cross section which cut|disconnected the connector unit with an electric wire with which the clamp body which concerns on a 3rd example was assembled|attached at the end surface position of a gland nut, and has shown the state where the gland nut was tightened. FIG. 34 is a detailed view around the covered electric wire in FIG. 33. It is a figure which shows the retaining member which is a conventional example of a clamp body. It is a figure which shows the state which attached the retaining member shown in FIG. 35 to the cable. It is a figure which shows the clamp nut which is a conventional example of a clamp body.

Hereinafter, a clamp body, a connector unit, and a connector unit with an electric wire of the present invention will be described with reference to the preferred embodiments shown in the accompanying drawings.

The embodiments described below are merely examples given for facilitating the understanding of the present invention, and do not limit the present invention. That is, the present invention can be modified or improved from the embodiments described below without departing from the spirit of the present invention. In particular, the materials and design dimensions of each member used in the present invention can be freely set according to the application of the present invention and the technical level at the time of carrying out the present invention. Also, of course, the present invention includes equivalents thereof.

<< About configuration example of connector unit with electric wire >>
A first example of the connector unit with electric wire 10 of the present invention will be described with reference to FIGS. 1 to 11 are explanatory views of the connector unit with electric wire 10. 2 to 6 are diagrams showing a state before tightening of the ground nut 24 described later, and FIGS. 7 to 11 are diagrams showing a state after tightening of the ground nut 24.

Further, in each of FIGS. 1 to 11, the X direction, the Y direction and the Z direction are shown as three directions orthogonal to each other, and the direction in which the covered electric wire 12 is pulled out from the case 16 described later is referred to as the X direction. To do. The direction away from the case 16 in the X direction is the +X side, and the opposite direction is the -X side. Further, the vertical direction of the case 16 corresponds to the Z direction, the upper side of the case 16 is the +Z side, and the lower side of the case 16 is the −Z side.
4 and 9 are cross-sectional views taken along the cutting plane (YZ plane) at the same position as the +X side end surface of the ground nut 24, and the same applies to FIGS. 23, 25, 31 and 33 described later. is there.

The connector unit 10 with an electric wire is used as a power feeding device for an object to be mounted such as a motor, and the covered electric wire 12 shown in FIG. 1 and the like and the connector 14 connected to the covered electric wire 12 (see FIGS. 5 and 10). ) And. When the connector 14 is connected to a mating connector (not shown) provided on the mounting target side, power is supplied from a power source (not shown) to the mounting target main body through the covered electric wire 12.

As shown in FIGS. 1 to 11, the connector unit with electric wire 10 is configured by combining a covered electric wire 12, a connector 14, a case 16 for accommodating the connector, and a joint component group 18 shown in FIG. 1. .. The covered electric wire 12 whose end portion is connected to the connector 14 is pulled out from the inside of the case 16 to the outside of the case 16, and the pulled-out portion is attached to the case 16 by the joint component group 18.

As shown in FIG. 1, the joint component group 18 includes a bushing 22 as a waterproof member, a ground nut 24 as a fastening member, and a cable clamp 30 as a clamp body. When attaching the covered electric wire 12 to the case 16, the covered electric wire 12 pulled out of the case 16 is inserted into the bushing 22 and a part of the bushing 22 (specifically, a substantially half portion on the +X side). Is fitted into the cable clamp 30, and the ground nut 24 with the cable clamp 30 fitted therein is assembled to the case 16.

Moreover, in the embodiment shown in FIGS. 1 to 11, the connector unit with electric wire 10 has a waterproof structure. That is, as shown in FIGS. 5 and 10, the connector 14 is covered with the case 16, and the gap between the opening of the case 16 from which the covered electric wire 12 is pulled out and the covered electric wire 12 is covered by the bushing 22. It is sealed. This can prevent water from entering the case 16 through the gap.

The part of the connector unit with electric wire 10 excluding the covered electric wire 12 corresponds to the connector unit 20, and is configured by the connector 14, the case 16, and the joint component group 18.
Hereinafter, each component device of the connector unit with electric wire 10 will be described.

(Case)
The case 16 is a device that accommodates the connector 14, corresponds to a mounting component to which the covered electric wire 12 is attached, and includes a case body 61, a flange 62, and a wire drawing portion 63 as shown in FIGS. The case body 61 is a box-shaped member whose +Z side end is closed and whose −Z side end is open, and a concave connector accommodating portion 64 is formed inside thereof. The flange 62 extends in a rectangular shape from the outer peripheral portion of the −Z side end of the case body 61. Fixing holes are provided at the four corners of the flange 62, and the case 16 is fixed to the mounting target by the fixing screws 65 that pass through the fixing holes.

Further, as shown in FIGS. 5 and 10, a sealing material holding groove 66 that is closed so as to surround the periphery of the connector accommodating portion 64 is formed on the surface of the flange 62 facing the −Z direction. A sealing material 67 made of an elastic material such as rubber is sealed in the sealing material holding groove 66 in an elastically compressed state. By fixing the case 16 to the mounting object with the fixing screw 65 in this state, the gap between the flange 62 and the surface of the mounting object is sealed, and the waterproof performance is improved.

The wire lead-out portion 63 is an annular portion that protrudes toward the +X side from the side surface on the +X side of the case body 61. A through hole 68 is provided in the side wall of the case body 61 on the +X side so that the inside of the wire drawing portion 63 and the connector housing portion 64 communicate with each other. The covered electric wire 12 connected to the connector 14 in the connector accommodating portion 64 is drawn out of the case 16 through the electric wire drawing portion 63.
Note that the wire lead-out portion 63 is not limited to one that protrudes in the +X direction from the side surface on the +X side of the case body 61, and one that protrudes toward the -X side from the side surface on the -X side of the case body 61. Good.

Further, as shown in FIGS. 5 and 10, a step is provided at an intermediate position in the X direction on the inner peripheral surface of the wire drawing portion 63, and the inner diameter in the range on the −X side of the step has a step difference. Is smaller than the inner diameter in the range on the +X side.

Further, fitting protrusions 69 protruding toward the +X side are provided at the +X side end of the wire drawing portion 63 at regular intervals along the outer peripheral direction of the wire drawing portion 63. Further, although not shown in FIG. 1 and the like, a screw thread (strictly speaking, a male screw) is formed at the +X side end of the outer peripheral surface of the wire drawing portion 63.

(connector)
The connector 14 is connected in the Z direction to a mating connector (not shown) attached to the mounting object. The connector 14 has a terminal (not shown) and a housing 71 made of an insulating material that holds the terminal. When the lower end of the housing 71 is fitted into the housing of the mating connector, the terminals provided in the connector 14 and the terminals provided in the mating connector are electrically connected.

(Covered wire)
The covered electric wire 12 is composed of, for example, a cable (cable harness), and has a plurality of individually insulated electric wire portions 72 and a covering portion 73 that surrounds the electric wire portions 72, as shown in FIG. 6. .. Each of the plurality of electric wire portions 72 is connected to a terminal included in the connector 14 at its end portion. The covering portion 73 is made of an insulating material having elasticity and has a cylindrical shape, and its outer diameter is smaller than the inner diameter of the wire drawing portion 63.

The end of the covered electric wire 12 connected to the connector 14 is housed in the connector housing 64 together with the connector 14 as shown in FIGS. 5 and 10. On the other hand, most of the covered electric wire 12 is drawn out of the case 16 from the electric wire drawing portion 63.

The covered electric wire 12 is not limited to a cable having a plurality of electric wire portions 72, and may be a cord having only one portion corresponding to the electric wire portion 72, for example.

(Bushing)
The bushing 22 is a flexible rubber cylindrical body, and as shown in FIGS. 5 and 10, is fitted into the wire drawing portion 63 with the covered electric wire 12 being inserted inside the bushing 22. More specifically, the bushing 22 is fitted in the inner space of the wire drawing portion 63 in a range on the +X side of a step formed at an intermediate position in the X direction. As a result, the gap between the inner peripheral surface of the wire lead-out portion 63 and the covered electric wire 12 is sealed, and water is stopped in the gap.

A raised portion 23 slightly raised from the outer peripheral surface of the bushing 22 is provided in a region located slightly on the +X side of the −X side end position on the outer peripheral surface of the bushing 22. By providing such a raised portion 23, the close contact between the bushing 22 and the inner peripheral surface of the wire drawing portion 63 is enhanced, whereby the waterproof performance of the bushing 22 can be suitably exhibited.

(Grand nut)
The ground nut 24 is a tubular fastening part, and is assembled to the wire drawing portion 63 of the case 16 with the cable clamp 30 fitted inside the ground nut 24 (see FIGS. 2 to 5 and 7 to 10). .. As a result, the cable clamp 30 and the wire drawing portion 63 are fastened by the ground nut 24.

More specifically, the rear side (−X side) end of the ground nut 24 is assembled to the wire drawing portion 63, and the inner peripheral surface of that portion has a screw thread (female screw) formed therein. A mountain forming surface 25 is provided. That is, the thread forming surface 25 faces the outer peripheral surface of the wire drawing portion 63, and the thread of the thread forming surface 25 meshes with the thread formed on the wire drawing portion 63 side, whereby the rear end of the ground nut 24. The portion (the end portion on the −X side) is assembled to the wire drawing portion 63. For convenience of illustration, the threads of the thread forming surface 25 are omitted in FIGS. 5 and 10.

The front end (+X side) of the ground nut 24 is a portion where the cable clamp 30 fits inside thereof, and the inner peripheral surface of that portion is closer to the +X side (in other words, the screw). The taper surface 26 is provided so that the inner diameter thereof becomes gradually smaller (the distance from the crest forming surface 25). The tapered surface 26 faces the holding portion 33 of the cable clamp 30 when the ground nut 24 is tightened in the wire drawing portion 63 while the cable clamp 30 is fitted in the ground nut 24. As a result, the plurality of extending portions 34 of the holding portion 33 are pressed by the tapered surface 26 and elastically displaced. The inner diameter of the taper surface 26 at the front end (the end on the +X side) of the taper surface 26 is smaller than the outer diameter of the cable clamp 30 at the normal time (before the deformation).

(cable clamp)
The cable clamp 30 is a cylindrical elastic body that holds (clamps) the covered electric wire 12 connected to the connector 14 in a state of being attached to the case 16, and the covered electric wire 12 is inserted inside thereof. The cable clamp 30 according to the first example of the present invention has the outer shape shown in FIGS. 12 to 14 before holding the covered electric wire 12, and elastically deforms when holding the covered electric wire 12. The outer shape is shown in FIGS. 12 to 17 are explanatory views of the cable clamp 30 according to the first example of the present invention, and in each drawing, the X, Y, and Z directions are shown similarly to FIGS. 1 to 11.

As shown in FIGS. 12 to 17, the cable clamp 30 has an annular base portion 31 into which the covered electric wire 12 is inserted, and a holding portion 33 which holds the covered electric wire 12 inserted into the base portion 31. In the holding portion 33, a plurality of extending portions 34 extending from the base portion 31 in the central axis direction of the base portion 31 are arranged side by side along the circumferential direction of the base portion 31. In the connector unit with electric wire 10, the cable clamp 30 is arranged with the central axis C0 of the base 31 (see FIGS. 12 and 14) along the X direction. Therefore, the plurality of extending portions 34 extend along the X direction.

Here, the circumferential direction centered on the central axis C0 is a direction corresponding to the circumferential direction of the base portion 31, and is hereinafter referred to as the R direction. Further, hereinafter, as shown in FIGS. 14 and 17, the clockwise direction in the R direction when viewed from the +X side is the +R side, and the counterclockwise direction is the −R side. Further, in the following description, for convenience of description, the end on the +X side of the cable clamp 30 is referred to as the front end, and the end on the −X side is referred to as the rear end.

The inner diameter of the base portion 31 is slightly larger than the outer diameter of the covered electric wire 12 and slightly larger than the outer diameter of the bushing 22. The outer diameter of the base portion 31 is substantially equal to the outer diameter of the wire drawing portion 63 of the case 16, and is slightly smaller than the inner diameter of the thread forming surface 25 of the ground nut 24. Further, the total length (length in the X direction) of the base portion 31 is shorter than the total length of the bushing 22 as shown in FIGS.

Further, at the rear end of the base portion 31, as shown in FIGS. 12 and 13, fitting recesses 32, which are notched in an isosceles trapezoidal shape, are provided at regular intervals along the R direction. One of the fitting protrusions 69 provided on the wire drawing portion 63 of the case 16 can be fitted into each fitting recess 32. Here, the fitting concave portion 32 corresponds to a fitting portion included in the cable clamp 30, and the fitting protrusion 69 corresponds to a fitted portion included in the wire drawing portion 63. A convex portion corresponding to the fitting protrusion 69 may be provided, and in that case, a concave portion corresponding to the fitting concave portion 32 is provided in the wire drawing portion 63.

The holding portion 33 has a plurality of extending portions 34 arranged in a circle along the R direction at regular intervals. The number of the extending portions 34 included in the holding portion 33 is not particularly limited and may be 2 or more, preferably 3 to 6, and more preferably 6.

The plurality of extending portions 34 surround the covered electric wire 12 as shown in FIG. 6 when the covered electric wire 12 is inserted into the base 31. In addition, a slit-shaped gap is provided between the extending portions 34 that are adjacent to each other in the R direction. That is, each of the plurality of extending portions 34 extends from the base portion 31 in a state in which it can be elastically displaced so that the position of the protruding portion 35 changes in the radial direction. Then, when holding the covered electric wire 12, the holding portion 33 is deformed so as to be narrowed as shown in FIGS.

Each of the plurality of extending portions 34 has the same shape as each other, spreads in the R direction, has a certain width (width), and has the same thickness as the thickness of the base portion 31. However, the present invention is not limited to this, and the lateral widths and thicknesses of the extending portions 34 may differ between the extending portions 34. In addition, the two extending portions 34 that are adjacent to each other with a gap in the R direction have a pair of side faces (end faces in the R direction) that face each other with a gap, and the pair of side faces are planes that extend along each other. is there.

Further, as shown in FIGS. 12 to 17, each extending portion 34 extends in parallel to the central axis C0 during normal times (time before elastic displacement), as shown in FIG. The extending portion 34 is not limited to the one extending in parallel to the central axis C0, may be slightly inclined with respect to the central axis C0, or may extend in a direction intersecting with the central axis C0. You can put it out.

Furthermore, the tip of each extending portion 34 is bent in an L shape and has a protruding portion 35 that protrudes inward in the radial direction of the base portion 31 (hereinafter, simply referred to as “radial direction”). As shown in FIG. 14 and the like, the projecting portion 35 has a substantially fan shape in a front view, and when the holding portion 33 holds the covered electric wire 12, the outer peripheral surface of the covered electric wire 12 (correctly, the covered portion). The outer peripheral surface of 73 is abutted on the radially inner end surface of the protruding portion 35 to press the covering portion 73.
It should be noted that the shape of the tip of the extending portion 34 is L as long as it is pressed by the tapered surface 26 of the inner peripheral surface of the ground nut 24 and elastically displaced radially inward when the ground nut 24 is tightened. It may have a shape other than the letter shape.

In the cable clamp 30 according to the first example of the present invention, as shown in FIGS. 12 to 17, in each extension portion 34, the radially inner end portion of the protrusion 35 is partially cut away. More specifically, the corner portion (strictly speaking, the corner portion on the −R side) at the radially inner end portion of the protrusion 35 is cut out in a substantially trapezoidal shape, and is recessed radially outward by that amount. .. That is, in the protruding portion 35 of each extending portion 34, the long portion region 36 in which the protruding length is longer because it is not cut out, and the short portion in which the protruding length is shortened by the cutout portion. A region 37 is provided.

The long region 36 is a region that occupies most of the protrusion 35. The surface of the long region 36 at the radially inner end position is the first surface 38, which faces the outer surface of the covered electric wire 12 inserted into the cable clamp 30, and the holding portion 33 is covered. When the electric wire 12 is held, it abuts on the outer peripheral surface of the covered electric wire 12 and presses the covering portion 73. The first surface 38 is preferably a curved surface that is curved along the R direction so as to fit the outer peripheral surface of the cable clamp 30, but is not limited to this and may be a flat surface.

The short region 37 is adjacent to the long region 36 on the −R side, and has the second surface 39 and the connecting surface 40 at the radially inner end position. The second surface 39 is located at a position different from the first surface 38 in the R direction, and is located on the most −R side in the R direction in the first example. In addition, as shown in FIG. 14, the second surface 39 is present in the notched portion (specifically, the corner portion on the −R side) at the radially inner end of the protrusion 35, and the first surface 39 It is offset radially outward from 38. The second surface 39 may be a curved surface curved along the R direction or may be a flat surface.

The connecting surface 40 is located between the first surface 38 and the second surface 39 in the R direction as shown in FIG. 14 to be connected to these surfaces, and between the first surface 38 and the second surface 39. A step is formed. In the first example, the connecting surface 40 is an inclined surface that is inclined toward the −R side toward the outside in the radial direction, but is not limited to this, and may be a surface along the radial direction.

When the lengths of the first surface 38, the second surface 39, and the connecting surface 40 in the R direction are w1, w2, and w3, the following relational expression (1) is established.
w1>w2+w3 (1)
In the present embodiment, if the above relational expression (1) is satisfied, it is possible to sufficiently secure the strength of the protruding portion 35 even if the corner portion of the protruding portion 35 is cut out.
Further, when the radial length of the coupling surface 40 (in other words, the size of the step provided between the first surface 38 and the second surface 39) is h, the following relational expression (2) is established. doing.
h≧w2 (2)
If the radial length h of the coupling surface 40, that is, the size of the step, becomes excessively large, the strength of the protrusion 35 (particularly, the long region 36) may be reduced and the protrusion 35 may be deformed. Therefore, it is preferable that the length h is approximately the same as the length w2 of the second surface 39 in the R direction.

<< Assembly procedure of connector unit with electric wire >>
A procedure for assembling the connector unit with electric wire 10 having the above-described configuration (first example) will be described.
First, after connecting the end portion of the covered electric wire 12 to the connector 14, the connector 14 is housed in the case 16, and the covered electric wire 12 is pulled out of the case 16 from the electric wire drawing portion 63 of the case 16.

The covered electric wire 12 pulled out to the outside of the case 16 is inserted into the inside of a bushing 22 having a tubular shape as shown in FIG. The bushing 22 is attached to the wire drawing portion 63 by partially fitting the bushing 22 inside the wire drawing portion 63. More specifically, as shown in FIG. 5, the bushing 22 is fitted into the wire drawing portion 63 up to a position where the −X side end surface of the bushing 22 hits a step provided on the inner peripheral surface of the wire drawing portion 63. It When the −X side end surface of the bushing 22 hits a step on the inner peripheral surface of the wire drawing portion 63, approximately half the bushing 22 in the X direction protrudes from the wire drawing portion 63 to the +X side.

As shown in FIGS. 1 and 5, a cable clamp 30 is fitted into a portion of the bushing 22 that extends from the wire drawing portion 63 to the +X side. The cable clamp 30 is arranged at a position where the rear end (the end on the −X side) of the base 31 abuts on the wire drawing portion 63 in the X direction. At this time, the fitting projection 69 provided at the +X side end of the wire drawing portion 63 is fitted into the fitting concave portion 32 formed at the rear end of the base portion 31, and as a result, the cable clamp 30 for the wire drawing portion 63 is fitted. Rotation (relative rotation) is suppressed.

When the attachment of the cable clamp 30 is completed, a gap between the outer peripheral surface of the covered electric wire 12 and the inner peripheral surface of the electric wire drawing portion 63 in the radial direction, and the outer peripheral surface of the covered electric wire 12 and the cable clamp 30. The bushing 22 is interposed in a gap between the inner peripheral surface of the base portion 31 and these gaps are filled. After that, when the grant nut 63 is assembled to the wire drawing portion 63 and tightened, a waterproof structure is formed and water can be prevented from entering the connector accommodating portion 64.

Each of the plurality of extending portions 34 provided in the holding portion 33 of the cable clamp 30 has a tip portion that is bent in an L shape, and the tip portion, as shown in FIG. It is addressed to the +X side end of the. This can prevent the +X side end of the bushing 22 from being turned up.

After the cable clamp 30 is attached at a predetermined position, the ground nut 24 is assembled to the wire drawing portion 63. More specifically, as shown in FIG. 5, the cable clamp 30 and the wire drawing portion 63 are fitted inside the gland nut 24. As a result, of the inner peripheral surface of the ground nut 24, the screw thread forming surface 25 faces the outer peripheral surface of the wire drawing portion 63 in the radial direction, and the screw thread (male screw) formed on the screw thread forming surface 25 is an electric wire. It engages with a screw thread (female screw) provided on the outer peripheral surface of the drawer portion 63. At this time, the ground nut 24 is in the position shown in FIGS. 2 and 3 in the X direction.

When the ground nut 24 is tightened and moved to the -X side from the above state, the tapered surface 26 of the inner peripheral surface of the ground nut 24 reaches a position facing the holding portion 33 of the cable clamp 30 in the X direction, Each of the plurality of (six) extending portions 34 included in the holding portion 33 is pressed substantially uniformly inward in the radial direction. As a result, the holding portion 33 starts to deform so as to be narrowed radially inward (in other words, the extending portions 34 adjacent to each other in the R direction are in contact with each other). At this time, along with the deformation of the holding portion 33, the +X side end portion of the bushing 22 is also deformed so as to be narrowed radially inward (see FIG. 10 ).

After that, when the ground nut 24 is further tightened, the contact portion of each tapered surface 26 with each extended portion 34 is displaced inward in the radial direction, so that the pressing force from the tapered surface 26 to each extended portion 34 gradually increases. As a result, the deformation amount of the holding portion 33 also gradually increases. Then, when the ground nut 24 is tightened to the position shown in FIGS. 7 and 8 in the X direction, due to the deformation of the holding portion 33, the extending portions 34 adjacent to each other in the R direction protrude from each other as shown in FIG. The side surface of the portion 35 contacts. Thereby, each extension part 34 is regulated by the extension parts 34 on both sides thereof, and the displacement and deformation of the extension part 34 in the R direction (specifically, a helical twist about the central axis C0). ) Can be suppressed. As a result, further elastic displacement of each extension 34 is stopped, and excessive tightening of the covered electric wire 12 by the cable clamp 30 is suppressed.

Further, in the above state, the first surface 38 of the radially inner end surfaces of the projecting portions 35 of each extending portion 34 in the radial direction as shown in FIG. The covering portion 73 is pressed against the outer peripheral surface of the portion 73). That is, the first surface 38 is pressed against the covering portion 73 and the long region 36 of the protruding portion 35 bites into the covering portion 73, whereby the holding portion 33 holds (clamps) the covered electric wire 12.

Further, in a state in which the extending portions 34 adjacent to each other in the R direction are in contact with each other on the side surface of each protruding portion 35, the second surface 39 is the first inner surface of the protruding portion 35 of each extending portion 34 in the radial direction. It is located radially outside the one surface 38. That is, unevenness is formed along the R direction on the radially inner end surface of the projecting portion 35 of each extending portion 34. The unevenness can effectively prevent the covered electric wire 12 from rotating relative to the cable clamp 30.

To explain more clearly, for example, as shown in FIG. 18, when the projection 35 has no unevenness on the radially inner end surface, when the holding portion 33 of the cable clamp 30 is deformed and narrowed, each extension is extended. The radially inner end surface of the projecting portion 35 of the projecting portion 34 is arranged in a substantially circular shape along the outer peripheral surface of the covered electric wire 12. In such a configuration, the movement of the covered electric wire 12 in the X direction can be restricted by the protrusion 35 biting into the covered portion 73 of the covered electric wire 12, but the rotation of the covered electric wire 12 in the R direction ( That is, it is difficult to regulate the twist.

On the other hand, when the cable clamp 30 according to the first example of the present invention is used, when the holding portion 33 of the cable clamp 30 is deformed and narrowed, the protrusion of the covering portion 73 of the covered electric wire 12 is projected. While the portion of the portion 35 that is pressed by the first surface 38 is depressed, the excess portion of the covering portion 73 moves and bulges to a position adjacent to that portion. As shown in FIG. 11, this extra thickness portion faces the cutout portion of each protrusion 35, that is, the short region 37, and is formed in the cutout (that is, the recessed space formed by the second surface 39 and the coupling surface 40). Inside). The surplus portion that has entered the notch functions as a rotation restriction for the covered electric wire 12. More specifically, the uneven step surface of the protrusion 35, that is, the connecting surface 40 restricts the rotation of the covered electric wire 12. As a result, it is possible to effectively prevent the covered electric wire 12 held by the cable clamp 30 from being twisted and rotating with respect to the cable clamp 30.
The size of the cutout is preferably a size that allows the surplus portion to smoothly enter while securing the strength of the protruding portion 35, and in that sense, the first surface 38, the second surface 39, and the connection. It is desirable that the length of each surface 40 in the R direction be set to an appropriate length while satisfying the above relational expression (1).

When the ground nut 24 is tightened and the cable clamp 30 and the wire drawing portion 63 of the case 16 are fastened, the assembly of the connector unit with a wire 10 is completed. The completed connector unit with electric wire 10 is incorporated as a part of the mounting object by fixing the case 16 to the surface of the mounting object with the fixing screw 65.

<< Other configuration examples >>
The cable clamp, the connector unit, and the connector unit with an electric wire of the present invention have been described above with reference to specific embodiments (specifically, the first example), but the above-described embodiments are merely examples, and Other embodiments of the invention are possible.

For example, in the above-described embodiment (first example), the protruding portion 35 of the extending portion 34 is cut out in all of the plurality of extending portions 34 included in the holding portion 33 of the cable clamp 30, and the protruding portion 35 is provided. The radially inner end surface of (1) has both the first surface 38 and the second surface 39. However, the present invention is not limited to this, and the protrusion 35 is cut out in at least one extension 34, and the first surface 38 and the second surface 39 are provided on the radially inner end surface of the protrusion 35. Good. That is, among the plurality of extending portions 34, only some of the extending portions 34 may have the protruding portions 35 that are cut out, and the protruding portions 35 of the remaining extending portions 34 may not be cut out. ..

Further, in the above-described embodiment (first example), the corner portion of the protrusion 35 is cut out. However, the cutout portion of the protruding portion 35 is not particularly limited and may be an arbitrary portion. For example, as shown in FIGS. 19 to 26, the central portion of the protruding portion 35 in the R direction is cut out. The form (second example) is also conceivable.

19 to 22 are explanatory views of the cable clamp 30S according to the second example of the present invention, FIGS. 19 and 20 show a state before deformation, and FIGS. 21 and 22 show a state after deformation, respectively. There is. 23 and 25 are front views of the connector unit with electric wire 10S in which the cable clamp 30S according to the second example is assembled. FIG. 23 shows a state before the gland nut 24 is tightened, and FIG. The state after 24 is tightened is shown, respectively. 24 and 26 are detailed views around the covered electric wire 12, FIG. 24 is a partially enlarged view of FIG. 23, and FIG. 26 is a partially enlarged view of FIG. 25. It should be noted that, among the devices and parts used in the second example, those common to the first example are shown with the same reference numerals as in the first example in FIGS.

Even when the cable clamp 30S according to the second example is used, as in the first example, the excess thickness portion of the covering portion 73 of the covered electric wire 12 enters the notch of the protruding portion 35, and thus the cable The rotation of the covered electric wire 12 with respect to the clamp 30S can be effectively suppressed.

Further, in the above-described embodiment (first example), by notching each of the protrusions 35, both of the unevenness (in other words, the first surface 38 and the second surface 39) are formed on the radially inner end surface of each of the protrusions 35. I decided to provide it. However, the present invention is not limited to this, and as shown in FIGS. 27 to 34, by extending the lengths of the protruding portions in the radial direction between the extension portions 34 adjacent to each other in the R direction, in the R direction. An embodiment (third example) in which unevenness is formed is also conceivable. That is, by extending the extending portions 34 having the long protruding portions 35A having a longer radial length and the extending portions 34 having the short protruding portions 35B having a shorter radial length in the R direction, Concavities and convexities can be formed between the extending portions 34. In this case, the radially inner end surface of the long protrusion 35A corresponds to the first surface 38, and the radially inner end surface of the short protrusion 35B corresponds to the second surface 39.

27 to 34 are explanatory views of a cable clamp 30T according to a third example of the present invention, FIGS. 27 and 28 show a state before deformation, and FIGS. 29 and 30 show a state after deformation, respectively. There is. 31 and 33 are front views of the connector unit with electric wire 10T assembled with the cable clamp 30T according to the third example. FIG. 31 shows a state before the ground nut 24 is tightened, and FIG. The state after 24 is tightened is shown, respectively. 32 and 34 are detailed views around the covered electric wire 12, FIG. 32 is a partially enlarged view of FIG. 31, and FIG. 34 is a partially enlarged view of FIG. 33. Note that, among the devices and parts used in the third example, those common to the first example are shown in FIGS. 27 to 34 with the same reference numerals as in the first example.

When the covered electric wire 12 is held by the cable clamp 30T according to the third example, the holding portion 33 of the cable clamp 30T is deformed so as to be narrowed, and the extension portions 34 that are adjacent to each other in the R direction among the plurality of extension portions 34. Contact each other. At this time, one of the extending portions 34 has a long protruding portion 35A, and the long protruding portion 35A abuts on the outer peripheral surface of the covered electric wire 12 at the first surface 38, which is the radially inner end surface thereof, and is covered. It cuts into the covering portion 73 of the electric wire 12. The other extending portion 34 has a short projecting portion 35B, and a second surface 39, which is an end surface on the radially inner side of the short projecting portion 35B, is located more radially outward than the first surface 38. That is, in the third example, the long protrusions 35A form protrusions, and the recesses are formed in a range where the short protrusions 35B exist between the long protrusions 35A, and when the long protrusions 35A bite into the covering portion 73. Then, the extra portion of the covering portion 73 enters into the above-mentioned recess. Thereby, similarly to the first example, the rotation of the covered electric wire 12 with respect to the cable clamp 30T can be effectively suppressed.

It should be noted that the configuration for forming the unevenness between the extending portions 34 is not limited to the configuration in which the length in the radial direction of the protruding portion is different between the extending portions 34 as described above, and, for example, in the X direction. The extension portions 34 may have different lengths (that is, axial lengths) between the extension portions 34. For example, by arranging the extending portions 34 having a long axial length and the extending portions 34 having a short axial length alternately in the R direction, unevenness can be formed between the extending portions 34. In such a configuration, each extending portion 34 does not have to include a portion corresponding to the protruding portion 35, and the tip end portion of each extending portion 34 may extend relatively straightly. In this case, when the ground nut 24 is tightened, the distal end portion of the extending portion 34 having a long axial length is elastically displaced inward in the radial direction to a position where it bites into the covering portion 73 of the covered electric wire 12. On the other hand, the tip portion of the extension portion 34 having a short axial length is elastically displaced by a smaller displacement amount than the tip portion of the extension portion 34 having a long axial length. That is, in the above configuration, the surface of the distal end portion of the extending portion 34 having a long axial length, which faces inward in the radial direction, corresponds to the first surface. On the other hand, the surface of the distal end portion of the extending portion 34 having a short axial length that faces the radial inner side corresponds to the second surface, and the surface of the distal end portion of the extending portion 34 that has a long axial length that faces the radial inner side ( It is located closer to the base 31 in the X direction than the first surface). Also in the above configuration, when the ground nut 24 is tightened and the extending portions 34 adjacent to each other in the R direction come into contact with each other, the second surface comes to be positioned radially outward of the first surface.

10, 10S, 10T Connector unit with electric wire 12 Electric wire with coating 14 Connector 16 Case (mounting parts)
18 Joint parts group 20 Connector unit 22 Bushing (waterproof member)
23 Raised part 24 Ground nut (fastening member)
25 screw thread forming surface 26 taper surface 30, 30S, 30T cable clamp (clamp body)
31 base 32 fitting recess (fitting part)
33 holding part 34 extension part 35 projecting part 35A long projecting part 35B short projecting part 36 long part region 37 short part region 38 first surface 39 second surface 40 connecting surface 61 case body 62 flange 63 wire drawing part 64 connector accommodating part 65 fixing screw 66 sealing material holding groove 67 sealing material 68 through hole 69 fitting protrusion (fitted portion)
Reference Signs List 71 housing 72 electric wire portion 73 covering portion 100 retaining member 101 ring-shaped member 102 pillar member 103 convex portion 104 cable 105 cover body 200 cable clamp 201 comb blade 202 tip protrusion C0 central axis

Claims (15)

A clamp body for holding a covered electric wire connected to a connector in a state of being attached to a mounting component,
An annular base portion into which the coated electric wire is inserted, and a holding portion that holds the coated electric wire inserted into the base portion,
The holding portion is provided with a plurality of extending portions extending from the base portion in the central axis direction of the base portion side by side along the circumferential direction of the base portion,
The plurality of extension portions surround the covered electric wire inserted into the base portion, and extend from the base portion in a state in which the extension portions that are adjacent to each other in the circumferential direction are elastically displaceable so as to contact each other. ,
The holding portion has a first surface provided at a tip portion of the extension portion, and a second surface provided at a position where the tip portion of the extension portion is different from the first surface in the circumferential direction,
In a state where the extension portions adjacent to each other in the circumferential direction are in contact with each other, the first surface presses the outer circumferential surface of the coated electric wire, and the second surface is the first in the radial direction of the base portion. A clamp body characterized by being located outside the plane. Each tip of the plurality of extending portions includes the first surface at an inner end position in the radial direction, and has the second surface at a position different from the first surface in the circumferential direction. The clamp body according to claim 1. The tip of each of the plurality of extending portions has a protruding portion that protrudes inward in the radial direction,
The clamp body according to claim 2, wherein the first surface and the second surface are present on an inner end surface of the protrusion in the radial direction. A part of the inner end in the radial direction of the protrusion is cut out,
The clamp body according to claim 3, wherein the second surface is present in a cutout portion at an inner end portion of the protrusion in the radial direction. The corner portion of the inner end in the radial direction of the protrusion is cut out,
The clamp body according to claim 4, wherein the second surface is present in the notched corner portion at an inner end portion of the protrusion in the radial direction. On the inner end surface in the radial direction of the protrusion, there is further a connecting surface that connects the first surface and the second surface,
The length of the first surface in the circumferential direction is longer than the total of the length of the second surface in the circumferential direction and the length of the connecting surface in the circumferential direction. The described clamp body. The clamp body according to claim 6, wherein a length of the connecting surface in the radial direction is equal to or greater than a length of the second surface in the circumferential direction. The clamp body according to any one of claims 3 to 7, wherein the extending portions have the same shape. The tip of each of the plurality of extending portions has a protruding portion that protrudes inward in the radial direction,
Between the extending portions that are adjacent in the circumferential direction, the length of the protruding portion in the radial direction is different,
Of the extending portions adjacent to each other in the circumferential direction, an inner end surface of the protruding portion in the radial direction in the extending portion having a longer length in the radial direction is the first surface. The clamp body according to claim 1, wherein an end surface inside the protrusion in the radial direction in the extending portion, in which the length of the protrusion in the radial direction is shorter, is the second surface. 10. The plurality of extending portions are elastically displaced such that the extending portions adjacent to each other in the circumferential direction come into contact with each other at an end face in the circumferential direction of the projecting portion. The described clamp body. The clamp body according to any one of claims 1 to 10, wherein the base portion is provided with a fitting portion capable of fitting with a fitted portion provided in the attachment component. A clamp body according to any one of claims 1 to 11,
The connector,
A case as the mounting part for housing the connector therein;
An electric wire drawing portion provided in the case for drawing the coated electric wire connected to the connector out of the case,
A connector unit comprising: a fitting member that is fitted into the clamp body to elastically displace the plurality of extending portions, and that is assembled to the wire drawing portion and fastens the clamp body and the wire drawing portion. The fastening member is a gland nut,
Of the ground nut, the inner peripheral surface of the portion to be assembled to the electric wire drawing portion is provided with a thread forming surface on which a screw thread that meshes with a screw thread formed on the outer peripheral surface of the electric wire drawing portion is formed.
Of the ground nut, the inner peripheral surface of the portion that fits into the clamp body is provided with a tapered surface in which the inner diameter of the ground nut decreases as the distance from the thread forming surface increases,
The connector unit according to claim 12, wherein when the ground nut is tightened in the wire drawing portion, the tapered surface presses each of the plurality of extending portions inward in the radial direction to elastically displace the plurality of extending portions. A cylinder arranged in both the outer peripheral surface of the coated electric wire and the inner peripheral surface of the electric wire drawing portion in the radial direction, and in the gap between the outer peripheral surface of the coated electric wire and the inner peripheral surface of the base portion. The connector unit according to claim 12 or 13, further comprising a water-proof member. A connector unit with an electric wire, comprising the connector unit according to any one of claims 12 to 14 and the covered electric wire.