JP4208109B2 - Die set for cutting and cutting of wire connection sleeve and cutting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
A compression terminal connected to the end of the branch line connected to the main line of the electric wire, a linear sleeve for connecting the ends of the electric wire, etc. are inserted into the end of the electric wire and compressed and connected to the electric wire It has. The present invention relates to a cutting die set for cutting a sleeve crimped to the electric wire and removing it from the electric wire, and a sleeve cutting method using the same.
[0002]
[Prior art]
For example, when a compression terminal compression-connected to a branch line deteriorates with age and needs to be replaced, conventionally, the entire branch line is separated from the main line and replaced.
[0003]
[Problems to be solved by the invention]
In the above conventional method, since the compression terminal is replaced for each branch line, material is wasted, the old branch line is disconnected from the main line, a new branch line is prepared, the new branch line is connected to the main line, the new A lot of work of connecting the branch line and the compression terminal is required.
Accordingly, the present invention provides a slitting sleeve that can be cut off only from a sleeve such as a compression terminal by removing the sleeve such as a branch line without damaging the internal electric wire and reconnecting the new sleeve to the removed portion. An object of the present invention is to provide a die set for use and a sleeve cutting method using the same.
[0004]
[Means for Solving the Problems]
In the present invention, in order to solve the above-mentioned problem, a die set 1 is constituted by a pair of substantially identical dies 1a and 1b, and the dies 1a and 1b are provided with a cutting blade 2a and a contact portion 3a. A pair of cutting blades 2a are provided so as to extend parallel to each other along the electric wire W at a mutual interval substantially equal to the diameter of the electric wire W in the compressed sleeve S, and can be cut in the tangential direction to the outer periphery of the electric wire W. An abutting portion 3a is provided outside the pair of cutting blades 2a in parallel therewith. Further, the cutting blade 2a includes a parallel portion 2b in which the bottom of the cutting groove G to the sleeve S is parallel to the outer peripheral surface of the sleeve S, and the bottom of the cutting groove G is gradually inclined with respect to the outer peripheral surface of the sleeve S. And an inclined portion 2c that becomes shallower. When the tip of the cutting blade 2a reaches a predetermined cutting depth position closest to the electric wire W in the sleeve S, the contact portion 3a moves the upper and lower dies 1a, 1b when the tip surface 3b comes into contact vertically. Form the height to stop.
In the present invention, in the dies 1a and 1b, the blade portion 2 having a pair of cutting blades 2a is integrally formed, and the holder portion 3 having a pair of abutment portions 3a is separately formed integrally. The part 2 is configured to be detachable from the holder part 3 with a bolt 4.
Furthermore, in the present invention, the above-described die set 1 is mounted on the compressor 11 and used to move the sleeve S inserted between the pair of dies 1a and 1b in the axial direction while cutting the entire length by a plurality of cutting operations. By adopting a cutting method, in each of the subsequent cutting operations, the parallel portion 2b of the cutting blade 2a is cut into the inclined portion G2 of the cutting groove G by the previous cutting operation. Ensured linear continuity.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 is a front view of a state where the die set is mounted on a compressor, FIGS. 2 and 3 are front views of the die set showing a process of cutting the sleeve, FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 3, and FIG. FIG. 6 is a front view of the interrupting jig, and FIG. 7 is a side view of the interrupting jig.
[0006]
In FIG. 1, a die set 1 including a pair of upper and lower dies 1 a and 1 b is mounted on a hydraulic compressor 11. The upper die 1a is placed on the upper end of the cylinder C of the hydraulic compressor 11, and the lower cylinder 1b is placed on the ram R. The dies 1a and 1b are substantially the same shape in the effective portion.
[0007]
The dies 1 a and 1 b include a blade portion 2 and a holder portion 3, and the blade portion 2 is configured to be detachable from the holder portion 3 with a bolt 4. The blade part 2 has a pair of left and right cutting blades 2a, 2a.
[0008]
As shown in FIGS. 2 and 3, the pair of cutting blades 2 a extend parallel to each other along the electric wire W at a mutual interval substantially equal to the diameter of the electric wire W in the compressed sleeve S such as a compression terminal. And can be cut in the tangential direction to the outer periphery of the electric wire W. As shown in FIG. 4, the cutting blade 2a includes a parallel portion 2b and an inclined portion 2c. Accordingly, the cut groove G (FIG. 5) formed in the sleeve S by the cutting operation is gradually shallower with the parallel portion G1 whose bottom is parallel to the outer peripheral surface of the sleeve and the outer peripheral surface of the sleeve being inclined. It will have the inclination part G2. A recess 2b is formed between the two cutting blades 2a and 2a. When the tip of the cutting blade 2a reaches a predetermined cutting depth position closest to the electric wire W in the sleeve S (FIG. 3), the bottom surface 2e comes into contact with the top and bottom of the sleeve S and The depth is set to stop further biting of the dies 1a and 1b.
[0009]
The holder part 3 has a pair of parallel contact parts 3a arranged in parallel to the outside of the cutting blade 2a. When the tip of the cutting blade 2a reaches the predetermined cutting depth position closest to the electric wire W in the sleeve S (FIG. 3), the tip surface 3b comes into contact with the top and bottom dies 1a. , 1b is configured to stop the movement.
[0010]
As shown in FIG. 1, the die set 1 is mounted on a compressor, and the sleeve S inserted between the upper and lower dies 1a and 1b is sequentially moved in the axial direction, and the entire length is cut by a plurality of cutting operations. When the sleeve of the compression terminal is opened, a connection plate portion (not shown) is cut out from the sleeve S before starting the cutting operation. During the cutting operation, only the lower die 1b rises. For this reason, a phenomenon occurs in which the cutting of the lower cutting blade 2a proceeds before that of the upper cutting blade 2a. When a difference occurs in the progress of the cutting depth of the upper and lower blades 2a, for example, when the cutting depth of the lower cutting blade 2a first reaches a predetermined value before the contact surfaces 3a of the holder 3 contact each other, The top of the lower part of the hexagonal cross section of the sleeve S abuts against the bottom surface 2e of the recess 2d of the lower cutting blade 2a and further cutting is prevented. Therefore, after that, only the cutting of the upper cutting blade 2a proceeds, and the cutting depth of the upper and lower blades 2a is appropriately controlled by the contact of the contact surfaces 3a.
[0011]
Cutting is started from the tip side of the sleeve S. As shown in FIG. 5, in each cutting operation after the second time, a part of the inclined portion 2c of the cutting blade 2a and the parallel portion 2b are cut into the inclined portion G2 of the slit groove G by the previous cutting operation. Thus, the linear continuity of the slit groove G is secured. That is, since the cutting blade 2a has the inclined portion 2c, each subsequent cutting operation can be performed from the state in which the parallel portion 2b is inserted and positioned in the inclined portion G2 of the slit groove G by the previous cutting operation. it can. The blade 2a is guided and cut into the previous groove G, and the blade 2a and the sleeve S are relatively positioned so that the new groove is linearly continuous with the previous groove. When there is no inclined part 2c, the cutting edge cannot be inserted into the previous slit groove G in advance. The compression cross section of the sleeve is generally hexagonal. In this case, the sleeve S is set so that the top of the hexagon is vertically arranged between the upper and lower dies 1a and 1b, and the cutting operation is started. When the pair of cutting blades 2a approach and the tips thereof are in sliding contact with the inclined surface of the outer periphery of the sleeve S, the sleeve S is automatically placed at the center of the dies 1a and 1b. The same applies when the compression cross section is circular.
[0012]
When the sleeve S cannot be completely opened only by the above operation, the sleeve S is peeled off from the electric wire W using the interrupting jig 5 shown in FIGS.
[0013]
The interrupting jig 5 is formed by assembling four interrupting blades 6 with threaded rods 7 and 8 in the form of a cross. The interrupting blade 6 is held by a holder 9. The interrupting blade 6 is press-fitted into the split groove G by tightening the nut 10 that is screwed onto the threaded rod 8, and the groove G is opened.
[0014]
【The invention's effect】
As described above, in the present invention, without damaging the internal electric wire, only the sleeve can be cut and easily removed from the electric wire such as a branch line. Thus, the new sleeve can be connected again, whereby the compression terminal and the like can be exchanged economically in a short time.
[Brief description of the drawings]
FIG. 1 is a front view of a state in which a die set is mounted on a compressor.
FIG. 2 is a front view of a die set showing a process of cutting a sleeve.
FIG. 3 is a front view of a die set showing a process of cutting a sleeve.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is an explanatory view showing a process of cutting a sleeve.
FIG. 6 is a front view of an interrupting jig.
FIG. 7 is a side view of an interrupt jig.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Die set 1a Upper die 1b Lower die 2 Blade part 2a Cutting blade 2b Parallel part 2c Inclination part 3 Holder part 3a Contact part 3b Contact surface 4 Bolt G Cutting groove G1 Parallel part G2 Inclination part S Sleeve W Electric wire

Claims (3)

A die set consisting of a pair of substantially identical dies mounted vertically opposite to each other in order to sever the sleeve compressed and connected to the end of the wire in the axial direction and remove it from the wire,
A pair of cutting blades arranged such that the dies extend parallel to each other along the electric wire at a mutual interval approximately equal to the diameter of the electric wire in the compressed sleeve, and can be cut tangentially to the outer periphery of the electric wire;
It is arranged in parallel to the outside of the pair of cutting blades, and when the tip of the cutting blade reaches a predetermined cutting position closest to the electric wire in the sleeve, the tip surface abuts vertically and stops the movement of the upper and lower dies. A contact portion formed in the
The cutting blade includes a parallel portion where the bottom of the cutting groove to the sleeve is parallel to the outer peripheral surface of the sleeve, and an inclined portion where the bottom of the cutting groove is inclined with respect to the outer peripheral surface of the sleeve and becomes gradually shallower. A dice set for cutting and cutting a wire connecting sleeve.   The electric wire according to claim 1, wherein the integral blade portion having the pair of cutting blades is configured to be detachable with a bolt with respect to the integral holder portion having the pair of contact portions. Die set for cutting and cutting connection sleeves. A die set according to claim 1 is mounted on the compressor and used to cut the entire length by a plurality of cutting operations while moving the sleeve inserted between the pair of dies in the axial direction. Te, in each round of cutting operation of the second and subsequent, the inclined portion of the cut-split groove by previous rounds of the cutting operation, the cut by causing cut a part parallel portion of the inclined portion of the blade, linear of cut-split grooves cut-split method of the wire connection sleeve you characterized in that so as to ensure continuity.

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