JPS5964216A - Cable cutting machine - Google Patents

Abstract

PURPOSE:To realize efficient cutting of a communication cable equipped with a reinforcement steel wire rope in one body by providing a pair of cutting tips symmetrically along a symmetrical axis and connecting both cutting tips in their middles by means of a pivot pin in the form of scissors and further giving them tool angles most appropriate to cable cutting. CONSTITUTION:Cutting parts 1, 1 are equipped with steel wire rope cutting parts 1a shaped like small circular arc and copper wire cutting parts 1b shaped like large circular arc which are exchangeable so as to fit the shape of a cable B. When the cutting parts 1, 1 are put in opening condition to hold the cable B which is an object of cutting and driving measures are driven to insert a piston 8b and a wedge 8 between trundling rollers 6, 6, the cable B receives strong cutting force due to triangle of forces linking force exertion points on a pivot pin 3, trundling rollers 6, 6 and a roller contact face 8a. The cable B is completely severed while the cutting force is being adapted to the form of the cable B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting machine capable of efficiently cutting various communication cables, particularly communication cables integrally provided with reinforcing steel cables.

In communication cable lines, wires that span between pillars on the ground are exposed to the tension of their own weight, wind pressure, vibration, etc. of the collection of small copper wires for communication lines in the cable. As shown in Figure 1, in order to prevent breakage due to 1) are placed adjacent to each other and the outside is covered with a rubber body to form a straight line CAS-CPS or CA
A cable (B) called SG to CP SG is used.

During this overhead line work, it is often necessary to cut the connection part to a specified length, but this cut surface must be cut at a right angle to the cable axis, and each part of the cable must be cut at a right angle. The small copper wire must not be disturbed or uneven, and various cutting tools have been devised and used for this purpose. Due to the difference in hardness, if the same blade is used to cut at once, the cross section will be disturbed.In other words, the angle of the blade for copper wire will cause the part that touches the steel wire to have dents, etc. At this angle, the copper wire part may be cut or the cross section will be disturbed, so I had no choice but to cut off the rubber coating of the connecting part of both wires to open up the gap.
The conventional method was to use separate cutting machines for each. However, this method has a low work efficiency and requires a lot of work for the post-processing of the joints, and the cross-sectional lines of the steel cable part (B-1) and the copper wire part (B-2) are different. It had some drawbacks.

The present invention provides a cable cutting machine that can solve the drawbacks of the above-mentioned prior art, that is, can cut such cables reliably and simply in one go, and can also make the cut surface neat and tidy. be.

In the present invention, a pair of cutting blades (21 (21) each having a cutting part (11 (1,) inside the tip) are arranged symmetrically along the axis of symmetry (A), and both cutting blades +21 (21 are connected by a pivot pin (3) to form a scissor-like configuration, and each cutting part (1) is connected to a small arc-shaped steel cable cutting part (la>) provided on the side close to the above-mentioned connecting part and a mid-way pivot joint part. The steel cable section (B-1) of the cable (B) is formed by a large arc-shaped copper wire cutting section (1b) provided on a side further apart from each other, and the steel cable section (B-1) of the cable (B) is formed at the steel cable cutting section (1a) and the copper wire cutting section (1b). ) and a copper wire part (B-2) The present invention relates to a cable cutting machine characterized by providing an optimum cutting edge angle for cutting the copper wire part (B-2).

Hereinafter, an embodiment shown in the attached drawings (FIGS. 2 to 7) will be specifically explained. In this embodiment, the cable cutting machine is operated by a drive device attached to the rear of the cable cutting machine.

As shown in Figures 2 and 3, the cutting part (11 (11) is removably attached to the inside of the tip of the cutting blade (21 [2) with a pole +-+41, and this is connected to the cable (B). The cutting part (1) can be replaced with a cutting part fil ftl that matches the shape of the cutting part (1).The detailed structure of the cutting part (1) is shown in FIGS. It is a rectangular plate having a required thickness, and has a small arc-shaped steel cable cut section (1a) and a large arc-shaped copper wire cut section (1b) formed on its inner cut surface.Furthermore, each cut section (La) ( As mentioned above, the blade edge angle of 1b) is set to the optimum angle for cutting steel cables and copper wires, but in this example, the blade edge angle for cutting steel cables (α) (β
) are 10° and 45°, respectively, and the cutting edge angles (γ) and (δ) for cutting copper wire are 30° and 70°, respectively.

Further, the cutting blade (21 (cutting portion ti to 21)+1) is attached with the front and back sides reversed in order to cut the steel cable etc. by shearing. Further, the cutting blades f2) (21 are connected to each other at their midpoints by pivot pins (3), but the thickness is different at the front and rear parts including the connecting part.This means that each cutting blade f
21 +21 as shown in Figure 2, the symmetry axis (
This is to enable the ability to exceed A) and provide complete shearing functionality.

Next, the configuration of the drive device provided at the rear of the cutter 1jHM will be described (see FIGS. 2 to 5). In the figure (51+51 is a roller attachment part formed by providing a recess in the rear end of the cutting blade (21(2+)), and a transfer roller (61(G)) of the required width is installed in the same slot (51(G) is a roller bin (71(G)). (7
It is rotatably mounted at 1. In addition, (8) is a wedge body inserted between the rolling rollers (Gl (61);
8) has a screw pin (8b) at the rear, and the screw pin is driven by a required driving means (not shown) to move the wedge body (8) to the transfer roller (61F (between i1). can advance and retreat.

In addition, if we talk about other components related to the example,
In the figure (9) is the cutting blade (2) (2+, transfer roller (6)
(61, is a fork-shaped frame body that integrally attaches and supports the wedge body (8), etc., α01. (II) is the pivot pin (
3) is a lock bolt and nut that supports both ends of the forked frame body (9), and (12) is a cutting blade (21 (21 is a transfer roller f6) when the wedge body (8) is not inserted. This is a spring that is moved in the direction in which it is drawn and assumes the open position shown in FIG.

To describe the operation of the cable cutting machine having the above configuration, first, the cutting blade +2 in the open state shown by the solid line in Fig.
1+21 cutting section (11 (11) clamps the cable (B) that is the object to be cut, and then drives the driving means (for example, a hydraulic cylinder, not shown) to cut the piston (8b) and the wedge body (8). If it is inserted between the rolling roller (6) (61), the pivot pin (3) and transfer roller (6) (6
), the cable (B) will receive a huge maximum cutting force at the initial stage of cutting at the force triangle connecting the force application points on the roller contact surface (8a). After that, the cutting force gradually increases to the cable (B)
The cable (Y3) is completely cut off at the position indicated by the dotted line in FIG. 2.

In this LIJ cutting process, a small arc-shaped steel wire cutting section (1
a) is strongly attached to the small diameter steel cable part (r3-) of the cable (I3).
1) J cutting 2, the large arc-shaped steel wire cutting part (lb) cuts the copper wire part (B-2) of the person 1''f-.

As described above, according to the cable 9J cutting machine of the present invention, the steel cable part and the copper wire part of the cable can be cut with one machine! By using a folding machine, the material can be cut and folded reliably and easily, and the cut surface can be made in a rough order, so post-processing after separating the rubber coating is not necessary.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a cable cut by the cable cutting machine of the present invention, Fig. 2 is a partially sectional plan view of the cable cutting machine, Fig. 3 is a side view of the same, and Fig. 4 is the same as Fig. 3. 5 is a sectional view taken along the line II in FIG. 3, FIG. 6 is a plan view of the cut section, FIG. FIG. 6 is a side view taken from the ■-■I line. In the figure, (1) ψ bending part (1a) Small arc-shaped steel cable cutting part (It) - Large arc-shaped copper wire cutting part 1 IX (2) Cutting blade (3) Pivot pin (B) Cable ( I3-1) Steel cable section (B-2) Copper wire section Patent applicant: Atsushi Nishi Co., Ltd. agent: Masu Tebori (2 idiots)

Claims (1)

[Claims] 1. A pair of cutting blades (21 (21) each having a cutting part (11 fil) on the inside of the tip are arranged symmetrically along the axis of symmetry (A), and the middle of both cutting blades f21 + 21 is connected to a pivot pin (3). are connected to form a scissor-like configuration, and each cutting part (1
1 is formed by a small arc-shaped steel cable cutting part (Ia) provided on the side close to the connecting part and a large arc-shaped copper wire cutting part 11i (1b) provided on the side remote from the midway pivot joint part. , Furthermore, the angle of the cutting edge of the corner of the steel cable part (B-1) and the copper wire part (B-2) of the cable (B) are set at the steel cable cutting part (1a) and the copper wire cutting part (lb), respectively. A cable cutting/I-folding machine characterized by the following features: