JPH10271638A - Insertion apparatus for wire into grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insert a sheathed wire temporarily easily and quickly into a separate part at a grommet for an O2 sensor. SOLUTION: Hollow needles 14 are installed so as to correspond to insertion holes 6 in a separate part 5C. The hollow needles 14 are constituted so as to be capable of being expanded and opened. On the other hand, the inner circumference of every hollow needle 14 is opened and passed in such a way that a sheathed wire 1 can be inserted and passed. After the separate part 5C is expanded and opened by every hollow needle 14, the sheathed wire 1 is inserted into, and passed trough, the inner circumference of every hollow needle 14. After that, the separate part 5C is placed on the sheathed wire 1 by an extrusion part 17 which extrudes the separate part 5C from every hollow needle 14. Thereby, the separate part 5C is expanded and opened by every hollow needle 14, and the sheathed wire 1 can be inserted and passed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

Relates wire insertion device into the invention grommet BACKGROUND OF THE INVENTION, in particular, a covered wire for the O ₂ sensor, to wire insertion device into grommets for inserting the grommet is an assembly component with it.

[0002]

_2. Description of the Related Art Generally, an O ₂ sensor has a signal line in which a plurality of covered electric wires are covered with a glass varnish tube, and a grommet into which the covered electric wire of the signal line is inserted.
Referring to FIG. 9, which is a perspective view of a general O ₂ sensor signal line, the coated electric wire 1 of the signal line W is formed of a polyfluoroethylene-based resin from the viewpoint of heat resistance. At the end of each insulated wire 1, the insulated portion 3 is formed in a so-called half-strip state in which the insulated portion 3 is cut off in the vicinity of the tip and is not completely removed.

FIG. 10 is a perspective view of a grommet which is an assembly part of the signal line W of FIG. As shown in the figure, in the O ₂ sensor, it is necessary to insert each coated electric wire 1 of the signal line W into the insertion hole 6 of the grommet 5. This insertion hole 6
Are formed along the axial direction of the main body 51 formed in a substantially columnar shape, and each of the insertion holes 6 is assigned the covered electric wire 1 to be inserted therein. Therefore, it is necessary to insert the covered electric wires 1 into the specific insertion holes 6 assigned in advance.

The grommet 5 has a small diameter D of about 20 mm, and includes a main body 5A, a resin ring portion 5B detachably fitted to the main body 5A, and a resin ring portion 5B.
B is separated from a separate part 5C detachably provided with respect to B, and the insertion hole 6 formed in the separate part 5C is located between the main body part 5A and the resin ring part 5B. Is also quite small. Then, when inserting the insulated wire 1 of the signal wire W into the grommet 5, grasp the grommet 5 with one hand, grasp the signal wire with the other hand, and insert the insulated wire 1 from the separate portion 5C. Was.

[0005]

The above-described covered electric wire 1
Due to the characteristics of the product, it is essential that the product be prevented from bending or buckling and be securely inserted into the regular insertion hole 6. From such a viewpoint, it is necessary that a plurality of the coated electric wires 1 be inserted at the same time. However, as described above, the grommet 5 itself is a small member having a considerably small diameter, and in conjunction with the fact that the insertion work is performed exclusively by the manual operation as described above, each of the coated electric wires 1 is simultaneously inserted into the insertion hole 6. It was extremely difficult to insert. In particular, since the separate portion 5C of the grommet 5 has a smaller diameter than the insulated wire 1,
The insertion process was extremely difficult.

The position on the insulated wire 1 where the separate portion 5C is to be inserted is determined for a later process. However, when the insulated wire 1 is manually inserted into the grommet 5, the separate portion 5C is inserted. The mounting position varies greatly,
There was also a problem that the adjustment efficiency was required in the post-process and the working efficiency was deteriorated. The present invention has been made in view of the above problems, and has as its object to provide an electric wire insertion device for a grommet that can easily and quickly insert a coated electric wire into a grommet.

[0007]

In order to solve the above-mentioned problems, the present invention is provided for each of a plurality of insertion holes formed in a grommet, and the corresponding insertion holes are fitted.
The hollow needle is set to have an outer shape that allows the insertion hole to be expanded, and a plurality of hollow needles that allow the coated wire to be inserted through the grommet to be inserted into the inner circumference, and the hollow needle cantilevered with both ends of the hollow needle open And a retractable position that allows the grommet to be fitted into the hollow needle from the free end of the hollow needle by retracting toward the base end of the hollow needle. An extruding portion that moves to a free end side and is displaced between an extruding position for extruding the grommet on the hollow needle onto the covered electric wire, and a driving portion that displaces and drives the extruding portion between a retracted position and an extruded position. A device for inserting an electric wire into a grommet, comprising:

In the invention including the specific matter, the pushing section is retracted to the retreat position in advance by the driving section, and the grommets are attached to the plurality of hollow needles, so that each hollow needle simultaneously inserts the corresponding through hole of the grommet. Expand. By inserting the covered electric wire into the inner peripheral side of the hollow needle in this state, the covered electric wire can be easily introduced into the insertion hole of the grommet through the hollow needle.
Thereafter, by displacing the push-out portion from the retracted position to the push-out position by the driving portion, the grommet is displaced relative to the covered wire and pushed out from the hollow needle, and the grommet is placed on the covered wire introduced into the inner periphery of the hollow needle. Can be delivered (attached).

[0009] In a preferred embodiment, the positioning device further includes a positioning portion provided on the carrier, which positions the end of the covered electric wire introduced into the hollow needle, opposite to the opening at the base end side of the hollow needle. . In the invention including this specific matter, the mounting position of the grommet extruded from the hollow needle on the coated electric wire can be specified by positioning the coated electric wire introduced into the hollow needle by the positioning portion.

In the case where the positioning portion is provided, a preferable embodiment further includes an adjusting portion capable of adjusting an interval between the positioning portion and the opening on the distal end side of the hollow needle. In the invention including this specific matter, in specifying the mounting position of the grommet extruded from the hollow needle on the coated electric wire, by adjusting the facing interval between the positioning portion and the opening on the distal end side of the hollow needle,
It is easy to change specifications and support products with different part numbers. Here, the term “opening on the distal end side” is used as a reference, because the boundary where the grommet carried by the hollow needle is delivered to the coated electric wire is the opening on the distal end side. It is possible to specify the position to be delivered.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the following description, the same reference numerals are given to the O ₂ sensor signal line W and the grommet 5 described in FIGS. 9 and 10, and the description is omitted. FIG. 1 is a perspective view of an apparatus 10 for inserting an electric wire into a grommet according to an embodiment of the present invention.

Referring to FIG. 1, an apparatus 10 for inserting an electric wire into a grommet shown in the drawing includes a base plate 11 formed in a rectangular shape in plan view. A block-shaped carrier 12 is fixed to a substantially central portion of the base plate 11. The carrier 12 is formed in a substantially L-shape in which one end in the longitudinal direction of the base plate 11 is raised, and four hollow needles 14 equally distributed on the same circumference are formed in the end wall 13 on this one end. , Is arranged corresponding to the insertion hole of the separate portion 5C (see FIG. 2) and is fixed in a cantilever manner (in the following description, the direction in which the hollow needle 14 protrudes is assumed to be the front). .

FIG. 2 is an enlarged perspective view showing a main part of the hollow needle 14. As shown in FIG. Referring also to FIG.
Is formed in a substantially bamboo spear shape with its tip portion cut obliquely, and its edges are set so that the center side on the circumference is higher than each other. Then, as described later, by inserting the insertion hole 6 formed in the separate portion 5C of the grommet 5 into each hollow needle 14, the separate portion 5C is moved in a state where the insertion hole 6 is expanded. 14 will be carried. Examples of the material of the hollow needle 14 include iron and stainless steel.
It is preferable to use a thin and strong material having high mechanical strength. The inner diameter of the hollow needle 14 is set to a size necessary and sufficient for easily inserting the covered electric wire 1. This makes it possible to easily insert the covered electric wire 1 into the hollow needle 14 without receiving the frictional resistance of the separate portion 5C, as described later.

Returning to FIG. 1, the carrier 12 carries each hollow needle 14 with both ends open. Further, a positioning unit 15 is screwed to the rear end side of the carrier 12 with screws 16. The positioning unit 15 includes a positioning part 17 facing the base end side opening part of the needle 14 and a slide base part 18 that carries the positioning part 17. The positioning portion 17 is, for example, a metal member. The positioning portion 17 is attached to the carrier 12 via a slide base portion 18 so that the end surface of the covered electric wire 1 through which the needle 14 is inserted is brought into contact with the positioning portion 17 so that the covered electric wire 1 This is for defining the insertion amount when the hollow needle 14 is inserted. On the other hand, the slide base portion 18 is a plate-like member extending long in the front-back direction, and the positioning portion 17 is fixed to the rear end portion. Further, a long hole 19 extending forward and backward is formed in the slide base portion 18, and the screw 16 is inserted into the long hole 19, and is fixed to the support 12, so that in the front-back direction, An adjusting section that can adjust an interval L between the positioning section 17 and the opening on the distal end side of the hollow needle 14 is configured.

Here, the point of reference to the opening at the distal end is that, as will be described later, the boundary at which the separate portion 5C carried by the hollow needle 14 is transferred onto the insulated wire 1 is the opening at the distal end. Therefore, it is possible to specify the position to be transferred on the insulated wire 1 on the basis of this. Next, a lever unit 20 as a drive unit is disposed behind the support 12, and a push unit driven by the lever unit 20 is driven in front of the end wall 13 of the support 12. An extruding plate 21 is provided.

First, the extruding plate 21 is a sheet metal member formed in a vertically long rectangular shape, and has an elongated hole 21A formed along its longitudinal direction. By inserting each hollow needle 14 into the elongated hole 21A, the hollow needle 14 is retracted to the base end side thereof, and the retracted position allowing the separate portion 5C to be fitted from the free end of the hollow needle 14 and the hollow position. The needle 14 can be moved to the free end side and displaced between an extruded position where the separated portion 5C on the hollow needle 14 is extruded.

The lever unit 20 for driving the pushing plate 21 includes a mounting plate 22 mounted on the rear end of the base 11 and a mounting plate 2.
2, a rod holder 23 provided on the front end side, and a rod 24 which is reciprocally movable back and forth by the rod holder 23, and a tip of which is provided at a rear end of the rod 24 carrying the lower portion of the extrusion plate 21. And a handle unit 25 to be connected.

First, the rod 24 is a metal member having a circular cross section. In order to reciprocate the rod 24 back and forth, a groove 12A is formed in the lower portion of the support body 12 so that the rod 24 can be displaced in the groove 12 back and forth without any interference with other members. It has become. Further, in the illustrated embodiment, a stopper 26 facing the distal end of the rod 24 is fixed in front of the carrier 12, and the stopper 26 defines the length of the rod 24 projecting forward. ing.

The handle unit 25 includes a rod 24
A forked link arm 27 having one end connected to a rear end of the link arm by a pin P1, a pair of rotation arms 28 having an intermediate portion connected to the other end of the link arm by a pin P2, and a rotation arm 28; A shaft support member 29 erected on the rear end side of the mounting plate 22 to support one end of the arm with a pin P3, and a handle 30 connected to the other end of the rotating arm 28 with a pin P4. When the operator grips the handle 30 and rotates the rotating arm 28 around the pin P3 of the shaft support member 29, the link arm 27 connected to the rotating arm 28 is displaced. The rod 24 can be driven back and forth.

Next, the operation of the wire insertion device 10 to the above-described grommet will be described with reference to FIGS. 1 and 2 and FIGS. 3 to 7 are side schematic views (only a partial side schematic view of FIG. 6) showing a use state of the wire insertion device 10 into the grommet of FIG. First, referring to FIGS. 1 and 3, in the initial state, by operating the lever unit 20, the pushing plate 21 is in close contact with the end wall portion 13 of the support 12 (displaced to the retracted position. State). In this state, the worker inserts the separate portion 5C of the grommet 5 into the hollow needle 1.
4, the insertion hole 6 of the separate portion 5C is expanded as shown in FIG.

Next, as shown in FIGS. 2 and 4, the hollow needle 1 having the insertion hole 6 of the separate portion 5C expanded.
4, the coated electric wire 1 of the signal line W is inserted. In this operation, the predetermined covered electric wire 1 is positioned on the inner peripheral side of the hollow needle 14 and pushed forward, whereby
It becomes possible to insert four covered electric wires 1 at the same time.

As shown in FIG. 5, the insulated wire 1 is inserted into the hollow needle 14 to gradually
7 and finally comes into contact with the positioning portion 17 as shown in FIG. In this state, the signal line 1 is held with one hand, and the handle 30 of the handle unit 25 is held with the other hand.
Is operated, the extruding plate 21 is displaced from the retracted position to the extruded position, and the separating unit 5
C can be extruded from the hollow needle 14 and the separate portion 5C can be mounted on the covered electric wire 1.

After the operation of pushing the separate portion 5C is completed, the coated electric wire 1 may be pulled out from the hollow needle 14. As a result, as shown in FIG. 8, which is a side view of the signal line W after the separation unit 5C is mounted,
A predetermined length L is placed on the insulated wire 1 from its tip.
Separate part 5C can be attached to P,
Thereafter, the resin ring portion 5B and the main body portion 5A, which are the remaining members of the grommet 5, are easily mounted in this order, whereby the insertion can be completed.

As described above, in the above-described embodiment, the sheath portion 5C is expanded by the hollow needle 14 so that the covered electric wire can be easily inserted. 5
This has a remarkable effect that insertion of the coated electric wire into C can be performed easily and quickly. In particular, the hollow needle 1
Since the insulated wire introduced into the wire 4 is positioned by the positioning portion 17, the mounting position of the separate portion 5C extruded from the hollow needle 14 on the insulated wire 1 can be specified, so that the post-process is easy. And there is an advantage that work efficiency is further improved.

Further, when specifying the mounting position of the separate portion 5C extruded from the hollow needle 14 on the insulated wire 1, the facing distance L between the positioning portion 17 and the opening on the distal end side of the hollow needle 14 is adjusted. Therefore, it is easy to change the specifications and to deal with products having different part numbers, so that there is an advantage that versatility is enhanced. Each of the above embodiments is merely an example of a preferred specific example of the present invention, and the present invention is not limited to the above embodiment. It goes without saying that various design changes are possible within the scope of the claims of the present invention.

[0026]

As described above, according to the present invention, the grommet can be easily inserted by expanding the grommet with the hollow needle, so that the insertion of the insulated wire into the grommet, which has been conventionally difficult, can be performed. Can be performed easily and quickly.

In particular, when positioning the coated electric wire introduced into the hollow needle by the positioning portion, the mounting position of the grommet extruded from the hollow needle on the coated electric wire can be specified. There is an advantage that the operation becomes easier and the working efficiency is further improved. In addition, when specifying the mounting position of the grommet extruded from the hollow needle on the coated electric wire, if the facing distance between the positioning portion and the opening on the distal end side of the hollow needle can be adjusted, the specification change or Since it is easy to deal with products having different part numbers, there is an advantage that versatility is enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus for inserting an electric wire into a grommet according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view showing a main part of the hollow needle.

3 is a schematic side view showing a use state of the wire insertion device into the grommet of FIG. 1;

FIG. 4 is a schematic side view showing a use state of the wire insertion device into the grommet of FIG. 1;

FIG. 5 is a schematic side view showing a use state of the wire insertion device into the grommet of FIG. 1;

FIG. 6 is a schematic partial side view showing a use state of the electric wire insertion device into the grommet of FIG. 1;

FIG. 7 is a schematic side view showing a use state of the wire insertion device into the grommet of FIG. 1;

FIG. 8 is a side view of the signal line after the grommet is mounted.

FIG. 9 is a perspective view of a general O ₂ sensor signal line.

FIG. 10 is a perspective view of a grommet which is an assembly part of the signal line of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulated wire 5 Grommet 5C Separate part (main part of grommet) 10 Insertion device 12 Carrier 14 Hollow needle 17 Positioning part 20 Lever unit

Claims (3)

[Claims] A grommet is provided for each of a plurality of insertion holes, and the corresponding insertion holes are fitted into the grommet.
A plurality of hollow needles that are set to have an outer shape that allows the insertion hole to be expanded and that allow the insulated wire to be inserted through the grommet to be inserted into the inner circumference, and a cantilevered hollow needle with both ends of the hollow needle open And a retreat position configured to be displaceable relative to the support, retracted to the proximal end side of the hollow needle and allowing the grommet to be fitted from the free end of the hollow needle, and a hollow needle. An extruding portion that is displaced between an extruding position that moves to the free end side and extrudes the grommet on the hollow needle onto the insulated wire; and a driving portion that displaces and drives the extruding portion between the retracted position and the extruding position. A device for inserting an electric wire into a grommet, comprising: 2. The wire insertion device according to claim 1, wherein the end portion of the covered electric wire provided in the carrier and facing the base end side opening of the hollow needle and introduced into the hollow needle. Wire insertion device for a grommet, further comprising a positioning portion for positioning the wire. 3. An apparatus for inserting an electric wire into a grommet according to claim 2, further comprising an adjusting portion capable of adjusting an interval between the positioning portion and an opening on the distal end side of the hollow needle. .