JPH062232Y2 - Sleeve removal dice set - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In order to connect electric wires, a method is used in which sleeves are inserted into the butt ends of both electric wires, and the sleeves are hydraulically compressed.
The present invention relates to a hydraulic die used for removing a once compressed sleeve needs to be removed.

[Prior Art] An electric wire compression-connected using a sleeve sometimes needs to be removed only from the compression sleeve without damaging the internal electric wire due to heat generation due to poor conductivity of the connection portion or other reasons.

As a slightly similar object, Jitsuko Sho 46-19071
Is known, and a cutting tool for a C-type connector is disclosed. The C-type connector is one in which the ends of both electric wires are overlapped with each other to form an elliptical cross section in which two circles are combined, and this is inserted and compressed into the C shape of the connector to be integrated. In this known example, the lower die is provided with a ridge that makes it difficult to form a boundary between two circles, and the upper die is provided with a blade that cuts into both sides of the C-shaped cut, so that the connector is cracked by the mutual pressing of both dies. I am trying.
However, the die of this structure is incompletely cut off and cannot be used for a sleeve having an unbroken solid circular cross section.

For this reason, conventionally, a method has been employed in which drill holes are formed in the longitudinal direction of the sleeve and the grooves are dug to open the abdomen. However, opening the abdomen without damaging the internal wires is a time-consuming and difficult task.

[Means for solving the problem] A pair of blades that can be cut into the sleeve in the cutting line direction of the electric wire in the sleeve is provided on the upper die, and by pressing this, it cuts to both sides of the sleeve. The upper half notch is inclined and peeled to both sides. Then change the upper die,
The one having a pair of convex surfaces capable of pressing the peeling portion is used. In order to keep the sleeve in the same angular phase even after exchanging the upper die, the lower die is provided with a rotation stopping protrusion in the center. By sequentially using the above-mentioned two dies, even if there is a residual connecting portion after cutting, it can be completely separated by pressing and expanding, and the sleeve can be easily removed manually without damaging the electric wire.

[Example] FIG. 1 and FIG. 2 will be described. This invention is the lower die 1
And upper dice 2 and 3. The lower die 1 is formed with a sleeve 4 that can be fixedly placed in the lower half of the lower die 1, and has a protrusion 1a on its bottom surface for preventing rotation during construction. The upper die 2 is provided with a pair of parallel cutting blades 2a capable of being cut in the cutting direction in the outer circumference of the electric wire E in the sleeve, and is provided with a space capable of accommodating the peeling portion 4a inclined to both sides by the cutting. The upper die 3 is replaceable with the upper die 2 and can press the peeling portion 4a.
a.

The lower die 5 in FIG. 3 is another embodiment of the lower die when the upper die 3 is used. The bottom surface is formed wide and shallow so that the sleeve can be peeled more reliably, and the lower die 1 is replaced when the peeling portion 4a is pressed and expanded.

FIG. 4 shows a case where the lower die 1 is placed on the ram R of the hydraulic machine and the upper die 2 is attached to the upper end of the cylinder. The rise of the ram R causes the sleeve 4 to form a peeling portion 4a as shown in FIG. When the upper die 2 is removed and replaced with the upper die 3 and pressed again, the sleeve expands as shown in FIG. As a result, the sleeve taken out from the hydraulic machine can be easily detached from the electric wire E at the upper remaining side and the lower side by hand. To make the peeling more reliable, replace the lower die 1 with the lower die 5,
As shown in FIG. 3, the expansion of the sleeve is widened, and the removing work becomes extremely easy.

When the sleeve is longer than the die width, the position of the sleeve may be shifted on the lower die and the same operation may be repeated.
The upper dies 2 and 3 can be formed on the same shape member so that the upper dies can be drawn in and out from the side of the cylinder to simplify die replacement.

[Effect] It is possible to mechanize the sleeve laparotomy, which takes time. There is no fear of damaging the internal electric wires.

[Brief description of drawings]

FIG. 1 is a front view of a vertical die for cutting, FIG. 2 is a front view of a vertical die for expanding, and FIG. 3 is a front view showing another embodiment of the lower die 1 when the upper die 3 is used. The figure is a front view of an oil-oil machine equipped with a cutting die. 1, 5 ... Lower die, 1a ... Rush, 2, 3 ... Upper die, 2
a ... Cutting edge, 3a ... Pressing surface, 4 ... Sleeve, 4a ... Peeling part, E ... Electric wire, R ... Ram.

Claims (1)

[Scope of utility model registration request] 1. A sleeve having a lower die having a sleeve retaining ridge at the center of the receiving surface on which the sleeve can be fixed, and a pair of parallel cutting blades capable of cutting in the cutting line direction to the outer circumference of the electric wire in the sleeve. Upper die for cutting that can form peeling parts on both sides, and
A sleeve-removing die set consisting of three members, which are replaceable with the upper die and have both pressing surfaces capable of pressing the peeling portion, and which are the expanding upper die.