JP2584149Y2 - Jig for fitting grommet to electric wire with terminal - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a jig for fitting a grommet to an electric wire with a terminal, which is used to fit a grommet of a tube body to an electric wire group before a connector having a terminal attached to the end of the electric wire. It is about. The grommet in the present invention is a known tube-shaped grommet.
In addition to the protector, it refers to an elastic tube body that includes one fitted and fastened to the outer periphery of the wire bundle.

[0002]

2. Description of the Related Art A rubber tube grommet is fitted to a group of electric wires having terminals attached to the ends by the following means. That is, as shown in FIG. 4, the grommet 1A of the straight tube and the grommet 1B of the elbow-shaped curved tube are continuously fitted to the wire group 2 with the terminal 3, and are passed through the hollow portions 4 of the grommets 1A and 1B. A fitting jig provided with a projecting rod 11 for forcibly expanding the grommets 1A and 1B is used. After applying a lubricant to the outer periphery of the expanding rod 11, the grommets 1A and 1B are forcibly inserted with a fingertip. After holding, the connector 3 of the electric wire group 2 is inserted into the hollow portion 12 of the enlarged diameter rod 11 and pulled out rearward, and the grommets 1A and 1B in the forced enlarged diameter posture are slid from the enlarged diameter rod 11 with a fingertip. Then, an operation method of fitting the wire group 2 to the electric wire group 2 existing inside is adopted.

[0003]

The above conventional jig for fitting a grommet has a hollow portion 12 into which a group of terminals 3 can be inserted.
Grommets 1A and 1
B is forcibly fitted by hand to expand the diameter. The grommet 1B of the curved tube body is also forcibly inserted into the straight diameter expansion rod 11, and further, the entire inner circumference of the grommet 1A, 1B is expanded. Since the sliding contact with the diameter rod 11 is required, the resistance required for forcibly fitting to the diameter expansion rod 11 and slipping out from the diameter expansion rod 11 becomes extremely large. Therefore, in order to alleviate the resistance force as much as possible and to enable manual work, it is essential to apply a lubricant to the enlarged diameter rod 11, and the work of fitting the grommets 1A and 1B to the wire group 2 is not necessary. However, there is a problem in that the work is difficult to perform, and the work is easy to be tired, the work efficiency is extremely poor, and the mass production in recent years is lacking.

The present invention provides a grommet-type fitting jig which solves the above-mentioned disadvantages of the prior art.

[0005]

The grommet fitting jig of the present invention which solves the above technical problem is a hollow cylinder having a shell shape or a guide curved head, which is opened at the rear and has a terminal receiving chamber inside. And a lower half portion of the rear end of the leading guide portion extends rearward to form a semi-cylindrical wire tray portion and a through bar extending rearward from the rear end of the wire tray portion. And a structure in which the entire length from the front end of the leading guide portion to the rear end of the through bar is formed longer than the hollow portion of the grommet so as to pass through the hollow portion of the grommet.

Then, the terminal group of the electric wire group with the terminal to which the grommet is to be fitted is put into the terminal accommodating chamber of the leading guide portion, and the electric wire group extending from the terminal group is connected to the electric wire tray portion and the through bar. The grommet is fitted to the group of electric wires by holding it by hand, holding it with a hand, and leading a leading guide portion such as a bullet shape to penetrate the hollow portion of the grommet. In addition, as a change and aspect of the above-mentioned configuration, in order to allow the curved tubular grommets to pass through the hollow portion, the wire tray portion is made to be a flexible semi-cylindrical or the hollow portion passing resistance of the leading guide portion is reduced. To this end, a “self-lubricating adhesive tape made of fluororesin” may be attached to the outer periphery of the leading guide portion, or a “self-lubricating lubricant made of fluororesin” may be applied.

[0007]

The grommet fitting jig according to the present invention having the above-mentioned structure holds the terminal group in the terminal accommodating chamber of the leading guide portion and holds the wire tray section accommodating the wire group extending rearward together with the electric wires. When the grommet is pushed into the hollow portion of the grommet from the leading guide portion, the leading guide portion advances sequentially while expanding the hollow portion, and the electric wire group is guided by the leading guide portion and moves in conjunction therewith. And the fitting jig which penetrated the hollow part of grommet can be removed from a wire group, and a grommet can be fitted in the middle of a wire group.

When the leading guide portion is pushed into the hollow portion, since the leading portion forms a bullet shape or a guide curved surface head, the resistance is small, and the sliding contact area with the inner periphery of the hollow portion is small. The pushing force required for the push-in progress is significantly smaller than that of the conventional one. Furthermore, there is no need for a two-step main operation of "forced fitting to the enlarged diameter rod 11" and "slipping from the enlarged diameter rod 11" in the conventional fitting jig, and a grommet hollow portion for leading the leading guide portion. Only one-step work with only the penetrating work, and the main work elements are simplified. Furthermore, since the wire tray portion of the above aspect is made flexible, the hollow portion of the curved tubular grommet can elastically bend and pass through, so that the curved tubular grommet is forcibly formed into a straight shape. Than things
The fitting of the curved tubular grommets to the electric wire group is particularly simplified.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A grommet fitting jig according to an embodiment of the present invention will be described in detail with reference to FIGS. That is,
The figure shows a fitting jig used for continuously fitting a grommet 1A of a straight tube body and a grommet 1B of a curved tube body to the middle of a wire group 2 with terminals 3 of a wire harness. A leading guide portion 5 having a shape and an opening at the rear end; a semi-cylindrical wire tray portion 6 integrally provided at the rear end of the leading guide portion 5; It consists of a through bar 7 of a slender plate that extends slightly long,
The hollow portion of the leading guide portion 5 is a terminal accommodating chamber 8.

More specifically, the wire tray portion 6 is provided with the grommet 1
A part for inserting and holding the electric wire group 2 to which A.1B is fitted,
The lower half circumference of the rear end of the leading guide portion 5 forms a semi-cylinder extending backward as it is, and the leading guiding portion 5 and the wire tray portion 6 are formed.
Is formed of a thin metal plate such as aluminum, and the wire tray portion 6 has flexibility that can be elastically bent by a slight external force. And the leading guide part 5
The terminal accommodating chamber 8 is formed in such a size that a group of terminals 3 can be accommodated therein and the curved tube hollow portion 4 of the grommet 1B can be pushed in and passed therethrough. A “self-lubricating adhesive tape made of fluororesin” of Nitoflon (trade name) manufactured by Denko Corporation is affixed.

The through bar 7 functions as a push rod for penetrating the leading guide portion 5 through the hollow portions 4 of the grommets 1A and 1B, and an auxiliary stand on which the wire group 2 extending rearward from the wire tray portion 6 is placed. And extends rearward with a slight length L (L = 250 abrasion in this embodiment), and the total length from the rear end of the through bar 7 to the front end of the leading guide portion 5 is grommet 1A · The leading guide portion 5 which is formed slightly longer than the hollow portion of the hollow portion 1B and enters from one side of the hollow portion 4 of the grommets 1A and 1B can be pulled out from the other side of the hollow portion 4.

The above jigs for fitting grommets are used as follows. That is, referring to FIG. 2, first, the terminal 3 of the wire group 2 is put into the terminal accommodating chamber 8 of the leading guide portion 5, the wire group 2 following the terminal 3 is housed in the wire tray portion 6, and Stretch and prepare for fitting. At this time, it is not necessary that the total number of the terminal 3 groups be accurately aligned and put into the terminal accommodating chamber 8, and some of the lower terminals may be slightly displaced rearward. Then, the electric wire tray portion 6 of the fitting jig is gripped and held by hand, and is pushed into the hollow portion 4 of the grommet 1B in a free state, with the leading guide portion 5 at the top, and the hollow portion 4 of the grommet 1B is pressed. The wire tray section 6 is caused to elastically bend and pass through the curved path.

Subsequently, the leading guide portion 5 having passed through the grommet 1B is similarly pushed into the hollow portion 4 of the grommet 1A in a free state, and the portion of the through bar 7 is connected to the wire group 2
Hold it together, push it in further and let it pass through the hollow part 4,
The leading guide portion 5 protruding from the other end of the hollow portion 4 is pulled out, detached from the wire group 2, and the grommets 1A and 1B are continuously fitted at predetermined intermediate positions of the wire group 2. In addition, 1 in the figure
Reference numeral 3 denotes a lead wire drawn out from between the grommets 1A and 1B.

In the above embodiment, since the wire tray portion 6 has flexibility, the grommet 1 of the curved tube body is used.
When passing through the hollow portion 4 of B, by pushing force,
It easily bends elastically along the curved pipe of the grommet 1B and passes. And, by the leading guide action of the leading guide portion 5,
Wires can be passed through the grommets 1A and 1B very easily, and fitting of the grommets can be made very efficient. Comparison of the continuous fitting work of the grommet 1A and 1B according to the conventional structure of FIG. 4 and that of the embodiment of FIG.
The working interval of the embodiment of FIG.
/ 3, and continuous work became possible with less work fatigue, and there was a marked difference in workability.

The fitting jig of the present invention is not limited to the above-described embodiment, and the leading shape of the leading guide portion 5 is a guide having a hemispherical head 9 or a guide curved surface corner 10 as shown in FIG. There is a change to the head of the surface.

[0016]

[Effects of the Invention] As described above, the jig for fitting the grommet to the terminal-attached electric wire of the present invention has a particularly improved work efficiency compared with the conventional structure, and also simplifies the work and reduces work fatigue. It has the effect of producing productivity suitable for recent mass production systems.

[Brief description of the drawings]

FIG. 1 shows a jig for fitting a grommet to a terminal-attached electric wire according to an embodiment of the present invention, wherein (A) is a perspective view and (B) is a front view showing its usage.

FIG. 2 is an explanatory view showing the usage and fitting procedure of the fitting jig of FIG. 1 embodiment.

FIG. 3 is a front view showing a shape change of a fitting jig according to another embodiment of the present invention.

FIG. 4 is a perspective view showing the structure and usage of a conventional jig for fitting a grommet to an electric wire with terminals.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ・ 1A ・ 1B Grommet 2 Wire group 3 Terminal 4 Hollow portion of grommet 5 Leading guide portion 6 Wire tray portion 7 Pass-through bar 8 Terminal accommodating room 9 Semi-spherical head 10 Guide curved surface corner 11 Large diameter rod

Claims (3)

(57) [Scope of request for utility model registration] 1. A guide member having a hollow cylindrical shape having a shell shape or a guide curved surface head, which is opened rearward and has a terminal accommodating chamber, and a lower half of a rear end of the guide member extends rearward. An electric wire tray portion forming a semi-cylindrical shape, and a through bar extending rearward from the rear end of the electric wire tray portion, and the entire length from the front end of the leading guide portion to the rear end of the through bar is defined by A jig for fitting a grommet to a terminal-equipped electric wire, wherein the jig is formed to be longer than the hollow portion and can pass through the hollow portion of the grommet. 2. The jig according to claim 1, wherein the wire tray portion is formed on a flexible tray portion. 3. The fitting of a grommet to the electric wire with terminal according to claim 1 or 2, wherein a self-lubricating adhesive tape made of fluororesin or a self-lubricating lubricant made of fluororesin is applied to the outer periphery. jig.