JP2017131010A - Clamp and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp by which an electric wire bundle can efficiently be held in a bent state with high accuracy, and to provide a wire harness using the same.SOLUTION: A clamp 1 forming a wire harness 3 comprises: a clip part 11 locked in a through-hole 31 provided in a fixing part 30; and a clamp body part 12 provided integrally with a base 11a of the clip part 11 and having a protective space 13 for a straight electric wire bundle 2 with a C-shaped cross-section, which has an opening 14 such that a portion opposite the base 11a is open with a dimension smaller than the diameter of the electric wire bundle 2. The clamp body part 12 is a body molded from shape-memory resin. The protective space 13 has a straight shape imparted shape memory so as to be bent into an L shape, and also has a plurality of cuts 15 in an area corresponding to a corner part 16b outside a portion bent into an L shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a clamp having a clamp body made of shape memory resin and a wire harness using the clamp.

  For example, a wire harness for a vehicle may be connected to each circuit according to the arrangement position of each circuit to be connected, such as various optional circuits. The wiring environment is becoming diversified.

  In this type of conventional wire harness holding structure, the wire harness 24 is inserted between the guide projections 14 and 14 formed on both side edge portions of the guide member 10, wound with a tape 26 and fixed to the guide member 10. (Paragraph 0026, FIG. 3) (see Patent Document 1).

  On the other hand, in a wire harness for a vehicle, with the diversification of the wiring environment described above, there may be a situation where it is necessary to hold the wire harness in a state where it is bent at an intermediate position between circuits to be connected. Under such circumstances, the holding structure described in Patent Document 1 cannot hold the wire harness in a bent state.

  Therefore, in order to be able to hold the wire harness in a state bent to an L shape, as shown in FIG. 7, an offset clamp 51 having a bent portion 52 formed integrally with the clip 50 and bent at 90 degrees, for example, is used. The wire harness 80 has been conventionally known. FIG. 7A is a top view of the wire harness 80, and FIG. 7B is a front view thereof.

  In this conventional wire harness 80, first, the harness main line 70 is bent and placed on the offset clamp 51 along the bent portion 52, and then one end of the offset clamp 51 is wound around the harness main line 70 with a tape 60a. After that, the other end of the offset clamp 51 sandwiching the bent portion 52 is wound with the tape 60b together with the harness main line 70, and the clip 50 is passed through the fixing portion to hold the harness main line 70.

JP 2013-150522 A

  In the conventional wire harness shown in FIG. 7, the harness trunk, that is, the wire bundle is bent and placed on the offset clamp, and further, both ends of the offset clamp need to be bundled together with the wire bundle. For this reason, conventionally, there has been a problem that the bundling work for holding the electric wire bundle in a bent state takes time and the holding accuracy of the electric wire bundle is also lowered.

  The present invention has been made to solve the above-described problems, and provides a clamp that can be efficiently and highly accurately held in a state in which a bundle of electric wires is bent, and a wire harness using the same. With the goal.

  In order to achieve the above object, the clamp according to the present invention is provided integrally with a clip portion that is locked to a through-hole provided in a fixing portion and a base of the clip portion, and a portion on the opposite side of the base is an electric wire. A clamp main body portion having a protection space for the wire bundle having a C-shaped cross section having an opening that is smaller than the bundle diameter, and the clamp main body portion is a molded body made of a shape memory resin. There is a configuration in which the protection space has the linear shape memorized so as to be bent into an L shape, and has a plurality of cuts in the outer corner of the portion bent into the L shape.

  With the above-described configuration, the clamp according to the present invention simply inserts the wire bundle into a linear protective space with a C-shaped cross section and restores the memory shape at the time of shape memory, and does not require a bundling operation with tape. The bundle can be accurately held in a state where the bundle is bent into an L shape.

  Moreover, the wire harness which concerns on this invention has an electric wire bundle and the clamp of Claim 1 in order to achieve the said objective, The said electric wire bundle is accommodated in the said protection space, and the said clamp is the said memory | storage. When the shape is restored, the clamp main body has a configuration in which the plurality of cuts are expanded into a V shape and the protection space is bent into an L shape.

  With the above configuration, the wire harness according to the present invention does not require a bundling operation with a tape by simply inserting a wire bundle into a linear protection space with a C-shaped section of the clamp and restoring the memory shape at the time of shape memory. It is possible to form a wire harness in which the wire bundle is held with high accuracy and bent into an L shape.

  ADVANTAGE OF THE INVENTION According to this invention, the clamp which can be hold | maintained efficiently and with high precision in the state which bent the electric wire bundle, and a wire harness using the same can be provided.

It is a figure which shows the structure of the wire harness which concerns on one embodiment of this invention. It is a figure which shows the structure of the bending part vicinity seen from the arrow B direction of the clamp in FIG. It is a figure which shows the structure at the time of shaping | molding of the clamp which concerns on one embodiment of this invention. It is a figure which shows the shape memory | storage process of the clamp which concerns on one embodiment of this invention. It is a figure which shows the structure at the time of electric wire bundle insertion of the wire harness which concerns on one embodiment of this invention. It is a figure which shows the structure at the time of the electric wire bundle holding | maintenance of the wire harness which concerns on one embodiment of this invention. It is a figure which shows the structure of the conventional wire harness.

  Hereinafter, embodiments of a wire harness and a clamp according to the present invention will be described with reference to the drawings.

(About wire harness 3)
A configuration of a wire harness 3 according to an embodiment of the present invention will be described with reference to FIG. Fig.1 (a) is a perspective view of the wire harness 3 which concerns on this Embodiment, FIG.1 (b) is sectional drawing by the AA line of Fig.1 (a).

  As shown in FIG. 1, the wire harness 3 according to this embodiment includes a clamp 1 and a wire bundle 2. The clamp 1 has a clip part 11 and a clamp body part 12. The clip part 11 has a base 11 a and a pierced part 11 b, and the clamp main body part 12 is engaged with the through hole 31 by passing the pierced part 11 b through the through hole 31 provided in the fixing part 30. Is fixed to the fixing portion 30. The fixing unit 30 is an appropriate member that is present at a position in the middle of a location where the wire bundle 2 is routed, such as an engine room of a vehicle, and that can fix the wire bundle 2.

  The clamp main body 12 is provided integrally with the base 11 a of the clip portion 11. The clamp main body 12 has a protective space 13 having a C-shaped cross section in which an opening 14 having an opening on the opposite side of the base 11 a with a size smaller than the diameter of the wire bundle 2 is formed. The protection space 13 is a space for inserting the wire bundle 2 and protecting the wire bundle 2.

  The clamp body 12 is a molded body made of a shape memory resin, and is heated at a shape memory temperature before forming the wire harness 3, so that the protection space 13 has a C-shaped cross section and an L-shaped shape. Has been made. When the wire harness 3 is formed, the clamp main body 12 is a portion bent into an L shape as shown in FIG. 1 by restoring the memory shape (original shape) stored at the shape memory temperature. The bent portion 16 is provided.

  The configuration of the bent portion 16 of the clamp body 12 will be described in more detail with reference to FIG. 2A shows a side view of the vicinity of the bent portion 16 of the clamp main body 12 when the wire harness 3 in FIG. 1 is viewed from the direction of arrow B, and FIG. A sectional view taken along line C is shown.

  As shown in FIG. 2, in the wire harness 3, the clamp body 12 of the clamp 1 has a bent portion 16 having concentric inner corner portions 16 a and outer corner portions 16 b. The outer corner portion 16b has a plurality of cuts 15 formed at predetermined positions on the peripheral surface of the clamp main body portion 12. As shown in FIG. 2, the notch 15 is, for example, greatly expanded in a V shape as the bending portion 16 is bent, and forms a concentric corner (curved line) with the inner corner portion 16 a. . That is, in the present embodiment, the wire harness 3 is in a state in which the clamp main body portion 12 extends the plurality of cuts 15 into a V shape and the protective space 13 is bent into an L shape.

  With this configuration, the clamp body 12 can be bent in the subsequent shape memory step and the restoration step by forming a plurality of cuts 15 in advance in the peripheral surface position that becomes the outer corner portion 16b by restoring the memory shape. The curved shape of the portion 16 can be easily formed.

(Clamp 1)
The clamp 1 according to the present embodiment is used as a component of the wire harness 3 shown in FIG. 1, and has the configuration shown in FIG. 3 at the time of formation (manufacturing), that is, before shape storage. FIG. 3A is a top view showing a configuration of the clamp 1 according to the present embodiment before shape memory, and FIG. 3B is a right side view of FIG.

  As shown in FIG. 3, the clamp 1 is integrally formed with the clip portion 11 locked to the through hole 31 provided in the fixing portion 30 and the base 11 a of the clip portion 11 as described in the description of FIG. 1. And a clamp main body portion 12 provided. The clamp main body 12 has a protection space 13 for the linear electric wire bundle 2 having a C-shaped cross section having an opening portion 14 having a portion opened on a side opposite to the diameter of the electric wire bundle 2 at a portion opposite to the base 11a.

  The clamp body 12 is a molded body made of a shape memory resin as described above, and has a linear shape whose shape is stored so that the protective space 13 is bent into the L shape as the bent portion 16 described above. The clamp main body 12 has a plurality of cuts 15 at predetermined positions on the peripheral surface corresponding to the outer corner 16b (see FIG. 2) of the bent portion 16 that bends into an L shape when the stored shape is restored. ing.

  The clamp 1 according to the present embodiment can hold the wire bundle 2 in a bent state when the wire harness 3 is formed (see FIG. 1). In order to be able to hold the electric wire bundle 2 in a bent state, the clamp 1 needs to store in advance a shape having a bent portion 16 which is an aspect of the bent state in the clamp main body portion 12. Accordingly, the clamp 1 inserts the wire bundle 2 into the protective space 13 and heats it up to the temperature at the time of shape memory, whereby the clamp body 12 restores the memory shape having the bent portion 16 and the wire bundle. 2 can be held in a bent state.

  Next, the shape memory process of the clamp 1 will be described with reference to FIG. FIG. 4 is a top view showing the configuration of the clamp 1 in the shape memory step. In addition, the shape memory material used as the clamp 1 will be described on the assumption that the glass transition point is, for example, 85 degrees (° C.) and the shape is memorized at 95 ° C. to 100 ° C.

  In the shape memory step of the clamp 1, first, a member having a structure at the time of molding (see FIG. 3) is prepared, and as shown in FIG. C.). The clamp body 12 becomes soft enough to be bent by being heated to 85 ° C. In the shape memory step, after heating to 85 ° C. in FIG. 4 (a), the clamp body 12 is continuously heated until the shape is stored, for example, 95 ° C. to 100 ° C.

  For example, when the temperature reaches 95 ° C. to 100 ° C. due to the heating, an operation of bending the clamp main body portion 12 of the clamp 1 into an L shape as shown in FIG. Do. In this shape memory operation, the clamp main body 12 is bent so that the protective space 13 has a C-shaped cross section and an L-shaped shape, and the bent shape is stored. At that time, in the outer corner portion 16b of the bent portion 16 that is bent into an L shape, a plurality of cuts 15 spread in a V shape, and an L shape can be bent.

  After the shape memory operation shown in FIG. 4B is completed, the clamp body 12 is returned to a state where it is heated at a temperature of 85 ° C. as shown in FIG. In this environment, the bending portion 16 of the clamp body 12 is bent back, and the clamp body 12 is formed into a linear shape similar to that at the time of molding (see FIG. 3). Thereafter, the heating is stopped, and the process waits until the clamp body 12 reaches room temperature. The clamp body 12 at room temperature is stored in the shape shown in FIG. 4B, that is, the shape in which the protective space 13 has a C-shaped cross section and an L-shape, and the wire shown in FIG. It can be used as a component of the harness 1.

(Method for forming wire harness 3 using clamp 1)
Next, a method for forming the wire harness 3 using the clamp 1 will be described with reference to FIGS. 5, FIG. 5 (a) is a top view showing a configuration when the wire bundle 2 of the wire harness 3 according to the present embodiment is inserted, and FIG. 5 (b) is a right side view of FIG. 5 (a). It is. 6, FIG. 6 (a) is a top view showing the configuration of the wire bundle 2 of the wire harness 3 according to the present embodiment in a holding state, and FIG. 5 (b) is a right side view of FIG. 5 (a). It is.

  In order to form the wire harness 3 according to the present embodiment, first, the clamp 1 in which the clamp body 12 is returned to the linear shape by the operation shown in FIG. 4C is prepared, and shown in FIG. As described above, the wire bundle 2 to be protected is inserted into the linear protection space 13 of the clamp body 12.

  Next, the clamp main body 12 having the wire bundle 2 inserted into the protective space 13 is heated to 95 ° C. to 100 ° C., which is the temperature at the time of shape memory shown in FIG. . By heating at the temperature at the time of shape memory, the protection space 13 of the clamp body 12 is restored to the shape of the L-shaped section with the C-shaped cross section while the wire bundle 2 is inserted in close contact as shown in FIG. The completed wire harness 3 is completed.

  The wire harness 3 shown in FIG. 1 is completed by the procedure described above. In particular, in FIG. 1, the wire harness 3 is pierced so that the pierced portion 11 b of the clip portion 11 of the clamp 1 penetrates the through hole 31 of the fixing portion 30, and the clip portion 11 is locked to the through hole 31. Thus, the wire bundle 2 is fixed to the fixing portion 30 in a state where it is routed.

  In FIG. 1, as a procedure for attaching the wire harness 3 to the fixing portion 30, the clamp body portion 12 in which the wire bundle 2 is inserted into the protective space 13 is restored to the L-shaped shape, and then the clip portion 11 is used. The procedure for fixing to the fixing unit 30 has been described.

  In the present embodiment, the present invention is not limited to this. For example, a linear clamp main body portion 12 in which the wire bundle 2 is inserted into the protective space 13 is fixed to the fixing portion 30 by the clip portion 11. You may employ | adopt the procedure to restore | restore to the shape bent in L shape. In either case, the wire bundle 2 can be held in a state where it is bent at 90 degrees simply by heating the clamp body 12 to the temperature at the time of shape memory. Therefore, by using this wire harness 3, it is not necessary to bend and arrange the wire bundle 2 and then wind the tape, and the wire bundle 2 with high accuracy using the memory shape restoration function of the shape memory resin. Can be retained.

  As described above, the clamp 1 according to the present embodiment is provided integrally with the clip portion 11 that is locked to the through hole 31 provided in the fixing portion 30 and the base 11a of the clip portion 11, and the base 11a. And a clamp main body portion 12 having a protection space 13 for the linear wire bundle 2 having a C-shaped cross section having an opening portion 14 having a size smaller than the diameter of the wire bundle 2. In the clamp 1, the clamp body 12 is a molded body made of a shape memory resin, has a linear shape in which the protective space 13 is bent so as to be bent in an L shape, and is a portion bent in an L shape. The outer corner 16b has a plurality of cuts 15.

  With this configuration, the clamp 1 according to the present embodiment simply inserts the wire bundle 2 into the linear protection space 13 with a C-shaped cross section and heats it at the temperature during shape memory to restore the memory shape. It is possible to hold the wire bundle 2 with high accuracy in a state where the wire bundle 2 is bent into an L shape without requiring a bundling operation with a tape.

  Moreover, the wire harness 3 according to the present embodiment includes the electric wire bundle 2 and the clamp 1 described above. The clamp 1 is configured such that the wire bundle 2 is accommodated in the protective space 13 and the memory shape is restored, so that the clamp main body 12 expands the plurality of cuts 15 into a V shape and the protective space 13 is bent into an L shape. It is.

  With this configuration, the wire harness 3 according to the present embodiment allows the wire bundle 2 to be inserted into the linear protection space 13 having a C-shaped cross section of the clamp body 12 and heated at the temperature during shape memory to store the memory shape. Thus, the wire harness 3 bent in an L shape can be formed by holding the wire bundle 2 with high accuracy without requiring a bundling operation with a tape.

  Therefore, in this Embodiment, the clamp 1 which can be hold | maintained efficiently and with high precision in the state which bent the electric wire bundle 2, and the wire harness 3 using this can be provided.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and the technical scope of the claims includes various design changes within the scope not departing from the gist of the invention. For example, in the present invention, the clamp body 12 of the clamp 1 is made of shape memory resin and can be bent by restoring the original shape with the wire bundle 2 inserted into the protective space 13. The outer shape and the bending angle can be appropriately modified. Further, the structure provided at the position corresponding to the outer corner portion 16b in order to make it easy to form the curved shape of the bent portion 16 of the clamp main body portion 12 is not limited to the above-described notch 15, but, for example, a rectangular unevenness is formed in the longitudinal direction. The structure formed continuously may be sufficient.

  As described above, according to the present invention, there is an effect that the wire bundle can be efficiently and accurately folded and is useful for clamps and wire harnesses using the clamp. is there.

DESCRIPTION OF SYMBOLS 1 Clamp 2 Wire bundle 3 Wire harness 11 Clip part 11a Base 12 Clamp body part 13 Protection space 14 Opening part 15 Notch 16 Bending part (part bent in L shape)
16b Outer corner part 30 Fixed part 31 Through-hole

Claims (2)

A clip portion locked in a through hole provided in the fixed portion;
Clamp main body provided integrally with the base of the clip part and having a protection space for the wire bundle having a C-shaped cross section and having an opening that is open at a size opposite to the diameter of the wire bundle. And comprising
The clamp main body is a molded body made of a shape memory resin, has the linear shape in which the protection space is bent so as to be bent into an L shape, and is outside the portion bent into the L shape. A clamp having a plurality of cuts in a corner portion of. An electric wire bundle, and the clamp according to claim 1,
The clamp is in a state where the wire bundle is accommodated in the protection space, and the memory shape is restored, whereby the clamp main body portion expands the plurality of cuts into a V shape and the protection space is bent into an L shape. A wire harness characterized by that.

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