JPH0657019U - Jig for fitting grommets to electric wires with terminals - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention provides a "grommet fitting jig for an electric wire with a terminal" capable of highly efficiently and easily attaching a grommet to an electric wire with a terminal. [Structure] A shell-shaped hollow cylindrical body having a rear end opened, and a leading guide portion 5 having the inside as a terminal accommodating chamber 8 and a lower half portion of the rear end of the leading guide portion 5 are extended rearward as they are. It consists of a semi-cylindrical electric wire tray portion 6 and a through bar 7 extending a little backward from the bottom of the electric wire tray portion 6. The terminal accommodating chamber 8 and the electric wire group 2 are put in the electric wire tray portion 6, and the leading guide thereof is provided. The structure is characterized in that the grommet 1 is fitted to the electric wire group 2 by leading the part 5 through the hollow part 4 of the grommet 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grommet fitting jig for an electric wire with a terminal, which is used to fit a grommet of a tube body to a wire group before inserting a connector with a terminal attached to the wire end. The term "grommets" in the present invention includes not only known tubular grommet protectors but also elastic tube bodies which are fitted and tightened on the outer circumference of the wire bundle.

[0002]

[Prior art]

 When the grommet of the rubber tube body is fitted to the electric wire group with the terminal attached to the end, it is done by the following means. That is, referring to FIG. 4, when the grommet 1A of the straight tube body and the grommet 1B of the elbow-shaped bent tube body are connected and fitted to the electric wire group 2 with the terminal 3, they are passed through the hollow portion 4 of the grommet 1A / B. A fitting jig is used in which a diameter-expanding rod 11 that forcibly expands the grommets 1A and 1B is provided. After applying a lubricant to the outer circumference of the diameter-expanding rod 11, the grommets 1A and 1B cannot be forced with your fingertips. Insert and hold, and after that, insert the connector 3 of the wire group 2 into the hollow portion 12 of the expanding rod 11 and pull it out rearward, and also remove the grommet 1A, 1B in the forced expanding posture from the expanding rod 11 A work method is adopted in which the electric wire group 2 existing inside is slid and moved with a fingertip and fitted.

[0003]

[Problems to be solved by the device]

 The above-described conventional grommet fitting jig is one in which the grommets 1A and 1B are manually forcibly fitted to the outer circumference of the diameter expanding rod 11 having the hollow portion 12 into which the group of terminals 3 can be inserted to expand the diameter. The grommet 1B of the curved tube body is forced into the straight expansion rod 11, and the entire inner circumference of the grommets 1A and 1B is brought into sliding contact with the expansion rod 11, so the expansion rod 11 The resistance force required for forcibly fitting and slipping out of the expanded rod 11 becomes extremely large. Therefore, in order to soften the resistance force even a little to enable manual work, it is indispensable to apply the lubricant to the expanding rod 11 and to attach the grommets 1A and 1B to the wire group 2. Has a problem that it is difficult to perform complicated work and easily tired, its work efficiency is extremely poor, and it is not suitable for mass production in recent years.

The present invention provides a fitting tool for grommets that eliminates the above-mentioned problems of the conventional technology.

[0005]

[Means for Solving the Problems]

 The fitting jig for the grommet of the present invention which solves the above technical problem is "a leading guide part having a hollow cylindrical body having a shell shape or a guide curved head and having an opening at the rear and having the inside as a terminal accommodating chamber, and the leading guide part. The lower half part of the rear end of the guide part is composed of an electric wire tray part extending rearward to form a semi-cylinder and a through bar extending rearward from the rear end of the electric wire tray part. The structure is characterized in that the entire length to the rear end of the through bar is formed longer than the hollow part of the grommet so that it can pass through the hollow part of the grommet. "

Then, the terminal group of the electric wire group with terminals to which the grommets are to be fitted is placed in the terminal accommodating chamber of the leading guide section, and the electric wire group extending from the terminal group is connected to the electric wire tray section and the through bar. Grommets are fitted to the wire group by laying it on top and holding it by hand, and leading a shell-shaped leading guide part through the hollow part of the grommet. In addition, as a change / mode of the above-mentioned configuration, in order to enable passage of the hollow portion of the curved tubular grommet, the electric wire tray portion is made into a flexible semi-cylindrical shape or the hollow passage resistance of the leading guide portion. In order to reduce the noise, "fluorine resin self-lubricating adhesive tape" may be attached to the outer circumference of the leading guide part, or "fluorine resin self-lubricating lubricant" may be applied.

[0007]

[Action]

 The grommet fitting jig of the present invention having the above configuration holds the terminal group in the terminal receiving chamber of the leading guide section, and holds the electric wire tray section containing the electric wire group extending rearward together with the electric wires. When the grommet is pushed into the hollow part of the grommet from the leading guide part, the leading guide part guides forward and expands the hollow part to proceed in sequence, and the electric wire group is also guided and guided by the leading guide part. Then, the fitting jig that penetrates the hollow portion of the grommet can be removed from the wire group and the grommet can be fitted in the middle of the wire group.

[0008] The leading of the leading guide portion into the hollow portion has a small resistance because the head has a bullet shape or a curved inner surface, and the sliding contact area with the inner circumference of the hollow portion is also small. , The pushing force required for the pushing process is much less than the conventional one. Further, there is no need for the two-step main work of "forced fitting to the expanding rod 11" and "slipping out from the expanding rod 11" in the conventional fitting jig, and grommets for leading the leading guide portion Only one-step work is required to penetrate the hollow part, and the main work elements are simplified. Further, the flexible electric wire tray portion of the above aspect can elastically bend and pass through the hollow portion of the curved tubular grommet, so that the curved tubular grommet is forced to have a straight structure. In particular, fitting of curved tubular grommets to the electric wire group is particularly simplified.

[0009]

【Example】

 Hereinafter, a grommet fitting jig according to an embodiment of the present invention will be described in detail with reference to FIGS. That is, the drawing shows a fitting jig used for continuously fitting the straight tube tube grommet 1A and the bent tube tube grommet 1B in the middle of the wire group 2 with the terminal 3 of the wire harness. The inside of the leading guide 5 having a hollow shell shape and an opening at the rear end, the semi-cylindrical electric wire tray portion 6 integrally connected to the rear end of the leading guide portion 5, and fixed to the bottom of the electric wire tray portion 6. It is composed of a slender plate through bar 7 extending slightly rearward, and the hollow portion of the leading guide portion 5 is a terminal accommodating chamber 8.

Specifically, the electric wire tray portion 6 is a portion that holds and holds the electric wire group 2 into which the grommets 1A and 1B are fitted, and the lower half circumference of the rear end of the leading guide portion 5 is extended rearward as it is. The leading guide portion 5 and the electric wire tray portion 6 are formed of a thin metal plate such as aluminum, and the electric wire tray portion 6 has flexibility such that it can be elastically bent by a slight external force. There is. The leading guide portion 5 is formed in such a size that the terminal accommodating chamber 8 can accommodate the group of terminals 3 and can push through the curved tube hollow portion 4 of the grommet 1B to pass therethrough. Nitoflon (trade name) “self-lubricating adhesive tape made of fluororesin” manufactured by Nitto Denko Corporation is attached to the outer periphery.

The through bar 7 also functions as a backing rod for penetrating the leading guide portion 5 through the hollow portion 4 of the grommet 1A, 1B, and assists in mounting the electric wire group 2 extending rearward from the electric wire tray portion 6. It is a member that functions as a stand, has a slightly long length L (L = 250 in this embodiment) and extends rearward. The total length from the rear end of the through bar 7 to the tip of the leading guide portion 5 is a grommet. It is formed to be slightly longer than the hollow portion 1A / 1B, and the leading guide portion 5 that has entered from one side of the hollow portion 4 of the grommet 1A / 1B can be pulled out from the other side of the hollow portion 4.

The above-described grommet fitting jig is used as follows. That is, refer to FIG. 2. First, the terminal 3 of the electric wire group 2 is put into the terminal accommodating chamber 8 of the leading guide portion 5, the electric wire group 2 following the terminal 3 is accommodated in the electric wire tray portion 6, and the through bar 7 is placed above. Extend to prepare for fitting. At this time, it is not necessary to accurately align all the groups of terminals 3 into the terminal accommodating chamber 8, and some lower terminals may be slightly displaced rearward. Then, the electric wire tray portion 6 of the fitting jig is grasped and held by a hand, and the leading guide portion 5 is pushed into the hollow portion 4 of the grommet 1B in the free state, and the hollow portion of the grommet 1B is pushed. The electric wire tray portion 6 is elastically bent and passes through the curved path of 4.

Subsequently, the leading guide portion 5 that has passed through the grommet 1B is similarly pushed into the hollow portion 4 of the grommet 1A in the free state, and the portion of the through bar 7 is gripped together with the wire group 2, Further, it is pushed in to pass through the hollow portion 4, the leading guide portion 5 protruding from the other end of the hollow portion 4 is pulled out, removed from the electric wire group 2, and the grommet 1A, 1B is continuously fitted at a predetermined intermediate position of the electric wire group 2. To wear. In addition, reference numeral 13 in the figure is a lead wire drawn from between the grommets 1A and 1B.

In the above embodiment, since the electric wire tray portion 6 has flexibility, when the hollow portion 4 of the grommet 1B of the bent tube tube body is passed, the bending force of the grommet 1B is pushed by the pushing force. Easily bends and passes easily along the tube. Then, the leading guide action of the leading guide portion 5 makes it possible to pass the electric wire to the grommets 1A and 1B very easily and to make the grommet fitting extremely efficient. Comparing the continuous mounting work of the grommets 1A and 1B according to the conventional structure of FIG. 4 and that of the embodiment of FIG. 1, the work interval of the embodiment of FIG. There was a noticeable difference in workability because less tiredness made continuous work possible.

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

[0016]

[Effect of device]

 As described above, the grommet fitting jig for the electric wire with a terminal of the present invention has a significantly higher work efficiency than that of the conventional structure and simplifies the work, resulting in less work fatigue. It has the effect of achieving productivity suitable for mass production systems.

[Brief description of drawings]

FIG. 1 shows a jig for fitting a grommet to an electric wire with a terminal according to an embodiment of the present invention, (A) in the figure is a perspective view thereof, and (B) in the figure 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 grommet fitting jig for an electric wire with a terminal.

[Explanation of symbols]

 1 ・ 1A ・ 1B Grommet 2 Wire group 3 Terminal 4 Grommet hollow part 5 Leading guide part 6 Electric wire tray part 7 Through bar 8 Terminal accommodating chamber 9 Hemispherical head 10 Guide curved corner 11 Expanding rod

Claims (3)

[Scope of utility model registration request] 1. A lead guide part having a shell shape or a guide curved head hollow cylinder having an opening at the rear and having the inside as a terminal accommodating chamber, and a lower half part of the rear end of the lead guide part extends rearward. And a semi-cylindrical electric wire tray portion, and a through bar extending rearward from the rear end of the electric wire tray portion. The entire length from the front end of the leading guide portion to the rear end of the through bar is defined by grommet type. A jig for fitting grommets to an electric wire with a terminal, which has a structure which is formed to be longer than the hollow part and which can pass through the hollow part of the grommet. 2. A jig for fitting a grommet to an electric wire with a terminal according to claim 1, wherein the electric wire tray portion is formed as a flexible tray portion. 3. A grommet-like fitting to an electric wire with a terminal according to claim 1, wherein a self-lubricating adhesive tape made of fluororesin or a self-lubricating lubricant made of fluororesin is applied to the outer periphery. jig.