JP2012109096A - Clamp structure for electrical wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a total length of a clamp pole comprising each clamp and a pole body by shortening pitches of each clamp for holding an electrical wires.SOLUTION: A clamp structure for an electrical wire is employed where multiple clamps 2 are disposed in parallel that comprise a stationary plate 5 erected on a base 7 and a movable spring terminal 4 folded back from the stationary plate, and where a movable spring terminal of one clamp 2faces a stationary plate of an adjacent another clamp 2, between which an electrical wire 6 is inserted and caught. Ribs 14 and 15 for catching an electric wire are disposed alternately on the movable spring terminal 4 of the one clamp and the stationary plate 5 of the other clamp. A protrusion 17 formed on the movable spring terminal 4 of the one clamp enters between a pair of protrusions 16 formed on the stationary plate 5 of the other clamp, and a pore 18 for entering the protrusion 17 of the movable spring terminal thereinto is formed on the stationary plate 5.

Description

  The present invention relates to an electric wire clamp structure in which a plurality of electric wire clamping clamps are arranged in parallel in the manufacturing process of a wire harness.

  2. Description of the Related Art Conventionally, various wire clamp structures have been proposed in a wire harness manufacturing process in order to sandwich an electric wire with a clamp and transport it to the next process.

  For example, in Patent Document 1, a plurality of clamps are provided at an equal pitch on an endless belt for conveyance, the terminal portion of each electric wire is held by each clamp, and conveyed to the next process by intermittent rotation of the endless belt. It is described that a plurality of clamps are provided at an equal pitch on a long rod-shaped track, the terminal portion of each electric wire is held by each clamp, and conveyed to the next process by moving the track forward and backward.

  Further, in Patent Document 2, a plurality of clamps are inserted and fixed in a horizontal row on a long support rod, a support rod is arranged on the wiring board, and both ends of the electric wires routed on the wiring board are connected to each other. It is described that the clamp is inserted and clamped.

  FIG. 5 shows one form of a conventional wire clamp structure 51. A plurality of clamps 53 are arranged at an equal pitch on a rod body 52 which is a long aluminum clamp arrangement rail. 51), and the electric wire 54 is gripped and fixed between the pair of clamping claws 53a of the clamp 53.

JP-A-5-242945 (FIGS. 7-8, 16) Japanese Patent Laid-Open No. 7-335049 (FIGS. 7 to 8)

  However, in the above conventional wire clamp structure 51, each clamp 53 is constituted by a pair of clamping claws 53a. Therefore, the lateral width W of the clamp 53 is wide. Even if they are wrapped in a direction (in a zigzag pattern), the pitch between the clamps 53 tends to be large (as an example, the pitch is about 12 mm), and the main body 52 that holds each clamp 53, The entire length of the clamp rod 51 formed with the main body 52 is enlarged. For example, the length of the clamp rod 51 is at least 1200 mm in order to carry both ends (for 100 terminals) of the 50 electric wires 54 at a time. There was a problem that the size and layout were increased.

  In view of the above-described points, the present invention can shorten the pitch of each clamp for fixing an electric wire, thereby shortening the overall length of the clamp rod composed of each clamp and the rod main body. An object is to provide a clamp structure.

  In order to achieve the above object, a clamp structure for an electric wire according to claim 1 of the present invention comprises a plurality of clamps each having a fixed plate raised from the bottom and a movable spring piece folded back from the fixed plate in parallel. The movable spring piece of one clamp faces the fixed plate of the other adjacent clamp, and the electric wire is inserted and clamped between the movable spring piece of the one clamp and the fixed plate of the other clamp. It is characterized by.

  With the above configuration, the movable spring piece of one clamp and the fixed plate of the other adjacent clamp are positioned to face each other, and the movable spring piece of the one clamp and the fixed plate of the other adjacent clamp cooperate with each other. By sandwiching the electric wire, the width of the clamp (the width in the electric wire radial direction) and the pitch of each clamp, that is, the pitch between the electric wires to be clamped are reduced to about half of the conventional one. When the electric wire is inserted, one movable spring piece bends inward, and the electric wire is sandwiched and fixed between the other fixed plates by the restoring reaction force of the movable spring piece.

  The electric wire clamp structure according to claim 2 is the electric wire clamp structure according to claim 1, wherein the movable spring pieces of the one clamp and the fixing plate of the other clamp are alternately provided with the ribs for holding the electric wire. It is characterized by that.

  With the above configuration, the rib of the movable spring piece of one clamp and the rib of the fixing plate of the other clamp are displaced in the longitudinal direction of the electric wire, and the electric wire is slightly deformed in a wave shape by both ribs, thereby Hold firmly without slipping out. At least one of the ribs is arranged in parallel, and the other rib is arranged in parallel of two or more.

  The electric wire clamp structure according to claim 3 is the electric wire clamp structure according to claim 1 or 2, wherein the protrusion provided on the movable spring piece of the one clamp is provided on the fixed plate of the other clamp. It is characterized by having entered between a pair of protrusions.

  With the above configuration, the protrusion of one movable spring piece enters and engages between the pair of protrusions of the other fixed plate when the electric wire is not inserted, so that the one movable spring piece is accurately connected to the other fixed plate. Is positioned. Even when the electric wire is inserted, the protrusion of one movable spring piece is positioned between a pair of protrusions on the other fixed plate, and the protrusion of the movable spring piece is fixed even if a tensile force in the longitudinal direction acts on the electric wire. By abutting the projection of the plate in the longitudinal direction of the electric wire, bending of the movable spring piece in the longitudinal direction of the electric wire is prevented, and the unexpected withdrawal of the electric wire is prevented.

  The electric wire clamp structure according to a fourth aspect is the electric wire clamp structure according to the third aspect, wherein a hole for allowing the protrusion of the movable spring piece to enter is provided in the fixed plate.

  With the above configuration, since the hole is provided in the fixed plate between the pair of protrusions, the protrusion of one movable spring piece is engaged with the hole without contacting the other fixed plate when the electric wire is not inserted. In combination, the protrusion length of the protrusion is absorbed, and an increase in the pitch between the clamps due to the protrusion length of the protrusion is prevented.

  According to the first aspect of the present invention, since the electric wire is sandwiched between the movable spring piece of one clamp and the fixing plate of the other adjacent clamp, the pitch of each clamp for fixing the electric wire is conventionally increased. It can be shortened more than in the clamp. Thereby, the total length of the clamp rod composed of each clamp and the rod main body can be shortened as compared with the conventional one, and the size and layout of the equipment using the clamp rod can be made compact in the wire feeding direction.

  According to the second aspect of the present invention, the electric wire can be gripped in a zigzag manner by the rib of the movable spring piece of one clamp and the rib of the fixing plate of the other clamp to reliably prevent the electric wire from coming out in the longitudinal direction. it can.

  According to the invention of claim 3, the movable spring piece can be accurately positioned by engaging the protrusion of the movable spring piece of one clamp between the protrusions of the fixing plate of the other clamp, and the electric wire. Even if a tensile force acts on the electric wire in the inserted state, the protrusions abut on each other in the longitudinal direction of the wire, preventing the movable spring piece from bending in the longitudinal direction of the wire and preventing the wire from being unexpectedly pulled out. .

  According to the invention described in claim 4, when the electric wire is not inserted, the protrusion of the movable spring piece of one clamp is caused to enter the hole of the fixing plate of the other clamp to absorb the protrusion length of the protrusion. The pitch can be shortened.

It is a front view which shows one Embodiment of the clamp structure for electric wires which concerns on this invention. It is the front view which abbreviate | omitted the intermediate part which shows one Embodiment of the clamp rod to which the clamp structure for electric wires was applied similarly. It is the side view which looked at the clamp rod of FIG. 2 from the right side (rear end side, ie, fixed plate side). It is the top view which abbreviate | omitted the intermediate part which looked at the clamp rod of FIG. 2 from the upper side. It is a front view which shows one form of the conventional clamp structure for electric wires.

  1 to 4 show an embodiment of a wire clamp structure according to the present invention.

As shown in FIG. 1, the electric wire clamp structure 1, the electric wire clamping portion 3 of the clamp 2 is formed on each substantially inverted J-shape, arranged in parallel to each clamp 2 in the width direction, one of the clamp 2 ₁ the movable spring piece 4 of the electric wire clamping portion 3 is brought into contact with the fixed plate 5 on the rear side of the electric wire clamping portion 3 of the other clamp 2 ₂ adjacent, movable spring piece 4 of one clamp 2 ₁ and the other clamp 2 ₂ The electric wire 6 is inserted and clamped between the fixed plate 5 and the fixed plate 5. The movable spring piece 4 may be referred to as a flexible spring piece.

  As shown in FIGS. 2 and 3, the rectangular block-shaped bottom portion 7 (FIG. 1) of each clamp 2 is inserted into a horizontal guide groove (space) 9 inside the rail-shaped rod body 8, and the bottom portion 7 of each clamp 2. The clamp main body 11 standing upright projects upward from the heel body 8. The guide groove 9 has an opening between the pair of left and right upper collar portions 21 and at the front and rear ends of the collar body 8. A pair of left and right ridges 7e on the bottom 7 is slidably engaged with the recess 9a of the guide groove 9.

  As shown in FIG. 3, the bottom portion 7 is formed narrower in the left-right direction (the direction when the clamp alignment direction is the front-rear direction, that is, the electric wire longitudinal direction) than the clamp main body portion. The direction width is almost equal. The bottom portion 7 is provided with a female screw hole 10 or a screw insertion hole for fixing to the main body 8, and a bolt 20 (FIG. 2) is inserted into the hole 10.

  As shown in FIG. 1, the clamp main body 11 includes a fixed plate 5 that is vertically raised from the rear end surface 7 a of the bottom portion 7, and a folded portion that is folded back in a substantially inverted V shape or inverted U shape at the top of the fixed plate 5. 12 and a movable spring piece 4 extending vertically downward from the folded-back portion 12 to an intermediate portion in the height direction of the fixed plate 5, and the upper half portion 5 a of the fixed plate 5 and the movable spring piece 4 are connected to the electric wire holding portion 3. Is made. The lower half 5b of the fixing plate 5 is reinforced without bending by a forward inclined reinforcing rib 13, and the lower half 5b and the reinforcing rib 13 are erected on a horizontal upper wall portion 7d of the bottom portion 7.

  The fixed plate 5 has a plurality of narrow sandwiching ribs 14 in parallel on the outer surface of the upper half (represented by reference numeral 5a), and the movable spring piece 4 has a shape symmetrical with the rib 14 of the fixed plate 5 on the outer surface 4a. In addition, a plurality of narrow sandwiching ribs 15 are provided in parallel at positions slightly shifted in the left-right direction. The number of the ribs 14 of the fixed plate 5 in this example is three as shown in FIGS. 3 and 4, and the number of the ribs 15 of the movable spring piece 4 is four as shown in FIG. Each rib 14 and 15 has the recessed part 14a, 15a for electric wire holding | maintenance in the height direction intermediate part.

In Figure 1, in a not inserted state of the wire 6, enters between one clamp 2 ₁ of each rib 15 of the movable spring piece 4 for each rib 14 of the other clamp 2 ₂ of the fixed plate 5 of the adjacent (front) , the outer surface 4a of one clamp 2 ₁ of the movable spring piece 4 abuts against the outer surface 5a of the other clamping 2 ₂ of the fixed plate 5. In the inserted state of the electric wire 6, the ribs 14 and 15 press the electric wire 6 in the radial direction to firmly hold the electric wire 6 without coming out in the longitudinal direction, and smoothly insert and remove the electric wire 6 in the vertical direction with low friction. .

  As shown in FIGS. 1, 3 and 4, a pair of left and right rectangular protrusions 16 are provided on the outer surface of the lower half 5b of the fixing plate 5 adjacent to the lower side of the sandwiching rib 14, as shown in FIGS. As described above, one rectangular protrusion 17 is provided at the center of the outer surface of the lower end (free end) 4 b of the movable spring piece 4 adjacent to the lower side of the sandwiching rib 15. As shown in FIG. 3, the fixing plate 5 is provided with a hole 18 between the pair of protrusions 16.

As shown in FIG. 4, one one protrusion 17 of the clamp 2 ₁ of the movable spring piece 4 engages enters engagement between the pair of protrusions 16 of the fixing plate 5 of the other clamp 2 ₂ adjacent, as shown in FIG. 1, When the electric wire 6 is not inserted, the narrow tip 4b of the movable spring piece 4 enters between the pair of protrusions 16, and the protrusion 17 of the movable spring piece 4 is the hole 18 of the fixed plate 5 (FIG. 3). The movable spring piece 4 is positioned accurately, and the outer surface 4a of the movable spring piece 4 is brought into close contact with the outer surface 5a of the adjacent fixed plate 5 to reduce the spring force of the movable spring piece 4 (movable spring for a long time). The bending of the piece 4 is prevented.

Further, in the inserted clamping state of the wire 6 of FIG. 1, the tip end of one clamp 2 ₁ of the movable spring piece 4 of the tip half portion 17a of the protrusion 17 of the other clamp 2 ₂ adjacent fixed plate 5 of the projections 16 Even when the electric wire 6 is pulled in the longitudinal direction by entering and engaging between the half portions 16 a, the vertical outer surface 17 b of the protrusion 17 of the movable spring piece 4 becomes the vertical inner surface 16 b of the protrusion 16 of the fixed plate 5. Abutting, the bending of the movable spring piece 4 in the left-right direction (electrical wire longitudinal direction) is prevented, and the electric wire 6 is securely clamped.

  Contrary to the above, the fixed plate 5 is provided with four ribs 14 and / or one central protrusion 16, and the movable spring piece 4 is provided with three ribs 15 and / or a pair of left and right protrusions 17. In this case, however, the pair of protrusions 17 and the pair of holes 18 of the fixing plate 5 need to be formed narrow to prevent a decrease in strength. The actual use of the clamp 2 is possible without providing the protrusions 16 and 17 and the hole 18.

  As shown in FIG. 1, the bottom 7 of each clamp 2 has small protrusions 7 b in the front-rear direction on the upper and lower ends. When the electric wire 6 is not inserted, the protrusion 7 b at the rear end protrudes from the rib 14 of the fixing plate 5. The projection 7b at the front end is located on the same virtual vertical plane as the projection direction middle portion of the rib 15 of the movable spring piece 4, and is located on the same virtual vertical plane as the middle portion in the direction. They are in contact with each other.

  When the electric wire 6 is not inserted, the rear end surface 7a of the bottom portion 7 is located on the same virtual vertical surface as the outer surface of the lower half portion 5b of the fixing plate 5, and the outer surface of the upper half portion 5a is more than the outer surface of the lower half portion 5b. Located slightly forward, the rear end of the upper half rib 14 projects slightly rearward, the outer surface 4a of the movable spring piece 4 is located slightly rearward of the front end surface 7c of the bottom 7, and the rib of the movable spring piece 4 The front end of 15 protrudes slightly forward, and the front end surface 7c of the bottom 7 and the outer surface of the lower end (free end) 4b of the movable spring piece 4 are located on the same virtual vertical plane. An apex 12 a of the folded portion 12 on the upper end side connecting the fixed plate 5 and the movable spring piece 4 is located on the same virtual vertical plane as the center of the bottom portion 7 in the width direction, and the fixed plate 5 and the movable spring are interposed via the folded portion 12. It is located symmetrically with the piece 4.

The pitch P of each clamp 2 is as small as about half of the conventional one (about 6 mm). This, in place of the pair of holding claws of a conventional clamp, a single electric wire 6 in the first clamp 2 ₁ a movable spring piece 4 with a single fixing plate 5 of the other clamp 2 ₁ adjacent This is due to the fact that it was held. Accordingly, the overall length of the rail-shaped rod main body 8 (FIG. 2) that accommodates a plurality of (many) clamps 2 in a horizontal row, or the clamp rod 19 (FIG. 2) composed of a plurality of (many) clamps 2 and the rod main body 8. The overall length is reduced by nearly half compared to the conventional one. Thereby, the dimension and layout of the equipment using the clamp rod 19 are made compact in the wire feeding direction.

As shown in FIG. 1, (the rear side) one of the electric wire 6 from the upper clamp 2 ₁ of the movable spring piece 4 and the adjacent other (front) inserting horizontally between the fixed plate 5 of the clamp 2 ₂ Thus, only the movable spring piece 4 bends inwardly (backward) with the folded portion 12 as a fulcrum, and the fixed plate 5 is positioned vertically without being bent. The electric wire 6 is sandwiched and fixed by the recess 15 a of the rib 15 of the movable spring piece 4 and the recess 14 a of the rib 14 of the fixed plate 5. The electric wire 6 is inserted between the movable spring piece 4 and the fixed plate 5 while being held by a pair of left and right chucks (not shown) from above. It is also possible to forcibly push the electric wire 6 between the movable spring piece 4 and the fixed plate 5 with a vertical blade (not shown).

The electric wires 6 may be inserted one by one between the clamps 2, but two electric wires 6 may be inserted between two clamps 2 at the same time with two pairs of left and right chucks (not shown). Since the fixing plate 5 is not bent when the electric wire 6 is inserted, the insertion position accuracy of the electric wire 6 is increased. Even when the electric wire 6 is thick and the fixing plate 5 is bent slightly inward, the electric wire 6 is securely held by the spring force resulting from the bending of the fixing plate 5 and the spring force of the movable spring piece 4. Since the movable spring piece 4 of the wire before insertion into one clamp 2 ₁ is in contact with the fixed plate 5 of the other clamp 2 ₂ adjacent, the insertion position of the wire 6 is accurately defined.

  In the clamp rod 19 of FIG. 2, for example, a terminal of an electric wire 6 in which a terminal (not shown) is connected by crimping (or pressure contact), or a lead-out electric wire from a connector formed by inserting a terminal with the electric wire 6 into a connector housing (not shown). 6, that is, each electric wire 6 of a sub-wire harness (not shown) is clamped and fixed between each movable spring piece 4 and each adjacent fixing plate 5 and sent to the next process (wiring process, etc.) together with the electric wire with terminal and the sub-wire harness. It is done.

  For example, the clamp rod 19 is arranged (set) in a state where each clamp 2 is raised as shown in FIG. 2 in the next step of the terminal insertion step into the connector housing. The harness is carried horizontally by the chuck and pushed in by the vertical movement of the blade.

  The uses of the clamp 2 and the clamp rod 19 are not limited to this, and can be applied to various uses as described in the background art. It is also possible to arrange the clamps 2 at an equal pitch on an endless belt, a linearly moving track, or the like instead of the saddle body 8.

  The clamp structure for electric wires according to the present invention is used for shortening a clamp rod in which a large number of clamps are arranged in a row and for reducing the wire feed direction in a wire harness manufacturing process (apparatus) using the clamp rod. Can do.

DESCRIPTION OF SYMBOLS 1 Clamp structure for electric wires 2 Clamp 2 ₁ One clamp 2 ₂ Other clamps 4 Movable spring piece 5 Fixed plate 6 Electric wire 7 Bottom part 8 Body 14, 15 Rib for electric wire clamping 16 Pair of protrusion 17 Protrusion 18 Hole 19 Clamp rod

Claims (4)

  A plurality of clamps including a fixed plate raised from the bottom and a movable spring piece folded back from the fixed plate are arranged in parallel, and the movable spring piece of one clamp faces the fixed plate of another adjacent clamp. An electric wire clamp structure, wherein an electric wire is inserted and sandwiched between a movable spring piece of the one clamp and a fixed plate of the other clamp.   The electric wire clamping structure according to claim 1, wherein ribs for holding electric wires are alternately provided on the movable spring piece of the one clamp and the fixed plate of the other clamp.   The wire clamp structure according to claim 1 or 2, wherein a protrusion provided on the movable spring piece of the one clamp has entered between a pair of protrusions provided on a fixed plate of the other clamp. .   The electric wire clamp structure according to claim 3, wherein a hole for allowing the protrusion of the movable spring piece to enter is provided in the fixed plate.

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