JP2017199503A - Wire holding bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire holding bar having a novel structure, which can advantageously prevent a wire fitted in a wire clamp from displacing or withdrawing by being pulled by an arm of an automatic machine.SOLUTION: A wire holding bar 10 capable of holding wires 54 in parallel includes: a plurality of wire clamps 12 capable of sandwiching the wires 54 between a pair of elastic holding pieces 18 and 18; and a bar body 14 holding a plurality of wire clamps 12 arranged linearly. The wire clamp 12 is provided with an elastic sheet 30 in which in a direction orthogonal to an opposite direction of the pair of elastic holding pieces 18 and 18, a slit 32 that is located at least on one side of the elastic holding piece 18 and in which the wire 54 is fitted in the elastic holding piece 18 that is softer and more viscoelastic than the elastic holding piece 18 is press-fitted is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric wire holding bar used for holding electric wires in a manufacturing process of a wire harness.

  Conventionally, in a manufacturing process of a wire harness routed in an automobile or the like, an electric wire holding bar that can hold electric wires in a parallel state has been used. For example, in JP-A-8-31247 (Patent Document 1), a plurality of electric wire clamps that can hold an electric wire between a pair of elastic holding pieces and a plurality of electric wire clamps are held in a straight line. An electric wire holding bar having a bar body is disclosed.

  If such an electric wire holding bar is used, for example, an electric wire having a crimp terminal crimped to the end of the electric wire completed in the terminal crimping process is sequentially held by an arm of an automatic machine, and a pair of elastic clamps of the electric wire clamp of the electric wire holding bar The pieces can be sequentially fitted and sandwiched between the pieces, and at that time, the amount of protrusion and the direction of the crimp terminal crimped to the end of the electric wire from the bar body can be maintained in a desired state. Therefore, the operation of taking out the electric wire held by the electric wire holding bar with the arm of the automatic machine and moving it to the next process can be performed efficiently and stably.

  By the way, when inserting each electric wire between the elastic clamping pieces of the electric wire clamp of the electric wire holding bar, the arm of the automatic machine is elastically separated from both sides from the press-fitting portion to the elastic holding piece in the longitudinal direction of each electric wire. A pair of gripping portions projecting to the outside of the sandwiching piece is gripped, and the press-fitting portion of the electric wire is pushed into and fitted between the elastic sandwiching pieces in this state. When the fitting operation is completed, the gripping of the wire gripping portion by the arm of the automatic machine is released, and the arm of the automatic machine moves from the wire holding bar for the fitting of the next wire.

  However, when the arm of the automatic machine that has finished fitting the electric wire is released from the electric wire holding bar after releasing the electric wire, the electric wire holding part is The arm may be pulled by the arm while being fixed to the arm. Under the influence of the tensile force at that time, the electric wire fitted in the electric wire clamp may be displaced and the position and orientation of the terminal may not be maintained, or in the worst case, the electric wire may be detached from the electric wire clamp.

JP-A-8-31247

  The present invention has been made in the background of the above-mentioned circumstances, and the problem to be solved is that the electric wire inserted into the electric wire clamp is displaced or detached by being pulled by the arm of the automatic machine. An object of the present invention is to provide a wire holding bar having a novel structure that can be advantageously prevented.

  A first aspect of the present invention is an electric wire holding bar that can hold electric wires in a parallel state, and includes a plurality of electric wire clamps that can hold the electric wires between a pair of elastic holding pieces, and a plurality of the electric wire clamps. A bar body that holds the linearly arranged state, and the electric wire clamp is positioned on at least one side of the elastic clamping piece in a direction orthogonal to the opposing direction of the pair of elastic clamping pieces, An elastic sheet that is softer and has higher viscoelasticity than the elastic sandwiching piece and is provided with a slit into which the electric wire to be fitted into the elastic sandwiching piece is press-fitted is provided.

  According to this aspect, in each electric wire clamp of the electric wire holding bar, it is located on at least one side of the elastic holding piece in a direction orthogonal to the opposing direction of the pair of elastic holding pieces, and is softer and more viscoelastic than the elastic holding piece. Thus, an elastic sheet in which a slit into which an electric wire fitted into the elastic clamping piece is press-fitted is formed. As a result, after the electric wire held by the arm of the automatic machine is fitted into the elastic clamping piece of the electric wire clamp, the electric wire is released from the electric wire holding bar so that the electric wire is attached and pulled on the arm that moves from the electric wire holding bar. Even in such a case, the electric wire interferes with the elastic sheet, and the adhesion between the electric wire and the arm can be eliminated by friction resistance or the like. Therefore, it is possible to advantageously prevent the electric wire from being displaced by being pulled by the arm or being detached from the electric wire holding bar.

  In particular, since the elastic sheet is softer than the elastic clamping piece, it is avoided that the insertion force of the electric wire into the electric wire clamp becomes too large by arranging the elastic sheet, The holding stability of the electric wire clamp can be improved while avoiding an increase in the insertion force.

  A second aspect of the present invention is the one described in the first aspect, wherein a pair of the elastic sheets are disposed on both sides of the elastic clamping piece.

  In order to fit the electric wire into the pair of elastic holding pieces, the arm of the automatic machine needs to hold a pair of holding portions located on both sides of the press-fitting portion of the electric wire into the elastic holding piece. There is a risk of sticking to the arm. In this aspect, since the elastic sheet is disposed on both sides of the elastic clamping piece, the attachment of the electric wire to the arm of the automatic machine can be released more reliably and quickly, and the displacement of the electric wire relative to the elastic clamping piece can be reduced. Separation can be prevented more advantageously.

  According to a third aspect of the present invention, in the one described in the first or second aspect, the elastic sheet is detachably accommodated and held in a storage case.

  According to this aspect, since the elastic sheet is detachably housed and held in the housing case, the elastic sheet that is softer than the elastic sandwiching piece easily leans earlier than the elastic sandwiching piece. Therefore, the durability of the entire wire holding bar can be improved.

  According to the present invention, in each electric wire clamp of the electric wire holding bar, an electric wire that is positioned on at least one side of the pair of elastic holding pieces and is softer and higher in viscoelasticity than the elastic holding piece and is fitted into the elastic holding piece. An elastic sheet in which a press-fit slit is formed is provided. As a result, even when the electric wire is attached to and pulled by the arm moving from the electric wire holding bar after releasing the holding of the electric wire, the electric wire interferes with the elastic sheet and the electric wire and the arm are attached by frictional resistance or the like. Can be resolved. Therefore, it is possible to advantageously prevent the electric wire from being displaced by being pulled by the arm or being detached from the electric wire holding bar. In particular, since the elastic sheet is softer than the elastic clamping piece, it is avoided that the insertion force of the electric wire into the electric wire clamp becomes too large due to the arrangement of the elastic sheet. Therefore, holding stability can be improved while avoiding an increase in insertion force.

The disassembled perspective view which shows the electric wire holding bar as one Embodiment of this invention. The whole electric wire holding bar shown in FIG. 1 is a side view. The side view which shows the state which hold | maintained the electric wire in the electric wire holding bar shown in FIG. FIG. 4 is a plan view of FIG. 3.

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

  First, the electric wire holding bar 10 as one Embodiment of this invention is shown by FIGS. The electric wire holding bar 10 is used for holding an electric wire 54 to be described later in the manufacturing process of the wire harness, and holds the plurality of electric wire clamps 12 and the plurality of electric wire clamps 12 in a straight line. And a bar main body 14. The electric wire clamp 12 and the bar main body 14 are separately molded, and are formed by injection molding or the like using a synthetic resin such as polypropylene (PP) or polyamide (PA). In the following description, “upper” means the upper side in FIG. 2, “lower” means the lower side in FIG. 2, “front” means the left side in FIG. 2, and “rear” means the right side in FIG. Shall.

  The electric wire clamp 12 includes a base portion 16 having a substantially block shape, a pair of elastic clamping pieces 18 and 18 having a substantially tuning fork shape in a side view projecting upward from a central portion of the upper surface of the base portion 16, and a pair As viewed from the side, the elastic clamping pieces 18 protrude upward from the upper surface of the base 16 on both sides of the elastic clamping pieces 18 in a direction perpendicular to the opposing direction of the elastic clamping pieces 18, 18 (direction perpendicular to the paper surface in FIG. 2). And a flat housing case 20 having a substantially concave character shape. The pair of elastic clamping pieces 18 and 18 are connected to each other in such a manner that the elastic clamping pieces 18 having a substantially flat plate shape are opposed to each other. Are formed so as to open on both sides in the upper direction and the width direction (direction perpendicular to the paper surface in FIG. 2). More specifically, a taper guide portion 24 is formed in the electric wire holding recess 22 by a pair of tapered surfaces inclined obliquely downward and inward on the upper end side, while the tapered guide portion is formed on the lower end side. A slit 26 that is connected to 24 and extends downward is provided.

  In addition, storage cases 20 protrude from both sides of the pair of elastic clamping pieces 18 and 18 in the width direction. On the inner peripheral surface of the housing case 20, there is provided a housing groove 28 that is slit-like and that opens inward and upward and extends at a substantially constant depth. The storage case 20 having such a configuration is used in a state where the elastic sheet 30 is mounted in the storage groove 28. Here, the elastic sheet 30 is formed separately from the wire clamp 12 and has higher viscoelasticity than the synthetic resin constituting the elastic clamping piece 18 such as chloroprene rubber (CR) or nitrile rubber (NBR). It is integrally formed of a soft rubber material or the like. More specifically, the elastic sheet 30 has a substantially flat plate shape, and a slit 32 that opens upward and toward both sides in the thickness direction is provided at the center. On the upper end side of the slit 32, a tapered guide portion 34 is formed by a pair of tapered surfaces inclined downward and inward. Then, by pushing the elastic sheet 30 into the housing concave groove 28 from above, a fitting recess (not shown) provided in the housing concave groove 28 is fitted in a fitting recess provided in a peripheral portion of the elastic sheet 30 (not shown). The protrusions are fitted so that the elastic sheet 30 can be stably housed and held in the housing groove 28 of the housing case 20. As a result, a pair of elastic sheets 30 housed and held in the housing concave grooves 28 of the housing case 20 are disposed on both sides in the width direction of the pair of elastic sandwiching pieces 18, 18. On the other hand, when removing the elastic sheet 30 that is housed and held in the housing groove 20 of the housing case 20, the portion exposed to the outside from the housing groove 28 is picked and moved upward with a relatively large force. The above-mentioned fitting is released by pulling. That is, the elastic sheet 30 is detachably accommodated and held in the accommodation concave groove 28 of the accommodation case 20. In order to facilitate understanding, in FIG. 1, the storage case 20 that protrudes on one side (the front side in FIG. 1) in the width direction of the pair of elastic clamping pieces 18, 18 and the storage case 20 are shown. The elastic sheet 30 to be attached is indicated by virtual lines.

  The bar main body 14 has an elongated block shape that extends straight as a whole, and has a support portion 36 provided on the base end side, and a substantially bowl-like shape protruding from the upper surface of the support portion 36 along the support portion 36. It is comprised including the electric wire clamp attachment part 38 extended in this. The electric wire clamp mounting portion 38 includes a bottom wall 40 and a pair of side walls 42 and 42 protruding upward from both widthwise end portions of the bottom wall 40, and is configured to open in the front-rear direction and upward. Has been. Further, a bent wall 44 that protrudes inward in the opposing direction is formed at the protruding end of the pair of side walls 42, 42.

  Next, a procedure for assembling the electric wire holding bar 10 of the present embodiment using the plurality of electric wire clamps 12 and the bar main body 14 configured as described above will be described. First, a substantially mushroom-shaped rubber plug 48 to be described later is fitted into a rear opening of a wire clamp mounting portion 38 (not shown) of the bar main body 14. Subsequently, the base 16 of the electric wire clamp 12 is inserted from the front opening 46 of the electric wire clamp mounting portion 38 of the bar main body 14 and pushed toward the rear side. Here, the wire clamp attachment portion 38 extending in a substantially bowl shape is formed to be slightly larger than the base portion 16 of the wire clamp 12 in a front view, and a pair of side walls 42 constituting the wire clamp attachment portion 38, The opening width between the bent walls 44 of 42 is formed wider than the combination of the pair of elastic clamping pieces 18, 18 of the electric wire clamp 12 and the housing case 20. Therefore, the electric wire clamp 12 can be easily moved one after another by sliding it toward the rear side in a state in which the pair of elastic clamping pieces 18 and 18 and the housing case 20 protrude upward from the opening between the bent walls 44. It can be inserted into. Here, the adjacently disposed electric wire clamps 12 are arranged in a state of being separated by a predetermined distance by contact between the base portions 16 of the electric wire clamps 12. Then, as shown in FIG. 2, after inserting the last wire clamp 12, a substantially mushroom-shaped rubber plug 48 is fitted into the front opening 46 of the wire clamp mounting portion 38 of the bar body 14. Assembling of the electric wire holding bar 10 of this embodiment is completed.

  A manufacturing process of a wire harness using the wire holding bar 10 of the present embodiment having such a configuration will be described with reference to FIGS. For example, the electric wire 54 in which the crimp terminal 50 is crimped to the terminal by the anticorrosion process and the anticorrosive agent (not shown) is applied to the core crimping portion 52 which is the electric wire connecting portion is sequentially elongated by the arm (not shown) of the automatic machine. The two places in the direction are sandwiched and held by the wire clamp 12 of the wire holding bar 10 (see FIG. 4). Specifically, in each electric wire 54, two intermediate portions held between the arms of the automatic machine are connected to the pair of elastic holding pieces 18, 18 of the electric wire clamp 12, as shown in FIGS. The electric wire 54 formed therebetween is fitted and held in the electric wire holding recess 22 that can be held, and at the same time, the electric wire 54 inserted between the pair of elastic holding pieces 18 and 18 is connected to the electric wire clamp 12. The pair of storage cases 20 and 20 are press-fitted into the slits 32 of the elastic sheet 30 mounted in the storage grooves 28 of the storage cases 20 and held. As shown in FIGS. 2 to 3, when the end of the electric wire 54 is inserted into the electric wire holding recess 22, the taper first comes into contact with the tapered guide portion 34 of the elastic sheet 30. When the terminal of the electric wire 54 is pushed further downward in such a state, the elastic sheet 30 constituting the slit 32 connected to the tapered guide portion 34 is elastically deformed outward, and the terminal of the electric wire 54 is slit into the slit 26. It is allowed to move inward. Subsequently, the end of the electric wire 54 is brought into contact with the tapered guide portion 24 of the pair of elastic clamping pieces 18 and 18. When the end of the electric wire 54 is pushed further downward in this state, the end of the electric wire 54 is moved to the back of the slit 26 of the elastic sheet 30 and at the same time the pair of elastic clamping pieces 18 and 18 are connected. It is allowed to move in a direction away from each other with the base end portion as a center, and to move into a slit 26 provided to be connected to the tapered guide portion 24. As a result, the end of the electric wire 54 is configured to be held in a state where it is press-fitted into the slit 32 of the elastic sheet 30 mounted in the housing concave groove 28 of the pair of housing cases 20, 20 and a pair of elastic members. It is held in a state of being held in a slit 26 formed between the holding pieces 18 and 18 (see FIG. 3). Thereby, in the electric wire holding bar 10 of this embodiment, the end of the electric wire 54 can be clamped and held in a parallel state.

  Then, after inserting the end of the electric wire 54 into the electric wire clamp 12 until this state, the arm of the automatic machine releases the electric wire 54 and performs the operation of holding / fitting / holding the next electric wire 54 to each electric wire clamp 12. Each electric wire 54 is sequentially attached. Here, when the arm of the automatic machine moves to the operation of sandwiching the next electric wire 54, when the original electric wire 54 tries to move without being detached from the arm due to the viscosity of the anticorrosive agent scattered, etc. The electric wire 54 is detached from the arm due to the holding force by holding the pair of elastic holding pieces 18 and 18 and the holding force by pressing the pair of elastic sheets 30 and 30, thereby causing trouble in the operation of the automatic machine. Can be prevented. In short, even if an external force smaller than the force applied to the electric wire 54 at the time of normal electric wire drawing described later is applied, the electric wire 54 is not easily detached from the electric wire clamp 12.

  On the other hand, when pulling out the end of the electric wire 54, the arm of the automatic machine clamps two places protruding on both sides (vertical direction in FIG. 4) of the electric wire clamp 12, and the end of the electric wire 54 has the same force as that of the insertion. Add to. As a result, the holding force by holding the pair of elastic holding pieces 18 and 18 and the holding force by pressing the pair of elastic sheets 30 and 30 are released, and the end of the electric wire 54 can be pulled out.

  According to the electric wire holding bar 10 having such a structure, the housing cases 20 are formed on both sides of the elastic holding piece 18 in a direction orthogonal to the opposing direction of the pair of elastic holding pieces 18, 18 of the electric wire clamp 12. An elastic sheet 30 made of a rubber material or the like having higher viscoelasticity and softness than the synthetic resin constituting the elastic clamping piece 18 is mounted in the housing concave groove 28 of the housing case 20. Thereby, after the terminal of the electric wire 54 grasped by the arm of the automatic machine is fitted between the pair of elastic clamping pieces 18 and 18 of the electric wire clamp 12 or the slit 32 of the pair of elastic sheets 30 and 30, the electric wire 54 Even when the electric wire 54 is attached to and pulled by the arm moving from the electric wire holding bar 10 after releasing the grip, the holding force and the pair of the elastic pinching pieces 18 and 18 with respect to the electric wire 54 are held. The adhesion between the electric wire 54 and the arm can be eliminated by the holding force due to the pressure contact between the elastic sheets 30 and 30. Therefore, it is possible to advantageously prevent the electric wire 54 from being displaced by being pulled by the arm or being detached from the electric wire holding bar 10. Moreover, in the present embodiment, since the elastic sheet 30 is disposed on both sides of the elastic clamping piece 18, for example, even when the electric wire 54 is attached to the arm on both sides of the elastic clamping piece 18, The attachment of the electric wire 54 to the arm of the automatic machine can be released more reliably and quickly, and the displacement and detachment of the electric wire 54 held by the electric wire clamp 12 can be prevented more advantageously. Yes. Further, since the elastic sheet 30 is made of a rubber material or the like having higher viscoelasticity and softness than the synthetic resin constituting the elastic holding piece 18, the elastic sheet 30 is used when the electric wire 54 is attached to the electric wire clamp 12 by the elastic sheet 30. It is avoided that the insertion force becomes too large. Therefore, it is possible to improve the holding stability of the electric wire clamp 12 while avoiding an increase in the insertion force of the electric wire 54 into the electric wire clamp 12.

  In addition, in the present embodiment, since the elastic sheet 30 is detachably accommodated and held in the accommodating groove 28 of the accommodating case 20, the elastic sheet 30 that is softer than the elastic clamping piece 18 is more flexible than the elastic clamping piece 18. Even if it has settled quickly, it can be easily replaced, and the durability of the entire wire holding bar 10 can be 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 above embodiment, the elastic sheet 30 is disposed on both sides of the elastic clamping piece 18, but the present invention includes a case where the elastic sheet 30 is disposed only on one side of the elastic clamping piece 18. Moreover, in the said embodiment, although the storage case 20 which accommodates and hold | maintains the elastic sheet 30 was provided in the electric wire clamp 12, you may be provided in the bar main body 14. FIG.

10: Electric wire holding bar, 12: Electric wire clamp, 14: Bar body, 18: Elastic clamping piece, 20: Housing case, 30: Elastic sheet, 32: Slit, 54: Electric wire

Claims (3)

An electric wire holding bar that can hold electric wires in parallel,
A plurality of electric wire clamps capable of holding the electric wire between a pair of elastic holding pieces;
A bar body that holds the plurality of wire clamps arranged in a straight line; and
The wire clamp is positioned on at least one side of the elastic clamping piece in a direction orthogonal to the opposing direction of the pair of elastic clamping pieces, and is softer and higher viscoelastic than the elastic clamping piece, and the elastic An electric wire holding bar, characterized in that an elastic sheet in which a slit into which the electric wire inserted into the holding piece is press-fitted is formed.   The electric wire holding bar according to claim 1, wherein a pair of the elastic sheets are disposed on both sides of the elastic clamping piece.   The electric wire holding bar according to claim 1, wherein the elastic sheet is detachably accommodated and retained in an accommodation case.

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