JPS6314980Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cutter die used in equipment for cutting wire rods such as overhead wires for electric trains and reinforcing bars for construction.

To continuously cut relatively thick wire materials such as overhead contact lines and construction reinforcing bars, pressure mechanisms such as hydraulics are used.
It is desirable to operate Katsuta dice. However, in a cutter that cuts two cutter dies with blades facing each other, inserting the wire between them, moving the dies relative to each other, and bringing the cutting edges together to cut the wire, it is difficult to accurately control the die movement stroke of the pressure mechanism. If this is not regulated, the cutting edges of the dies will be pressed against each other, resulting in damage. This also applies to manual cutters. Therefore, it is recommended to provide a flat abutting surface on the side of the blade that is at the same level as the cutting edge or slightly protrudes from it to disperse the mutual contact pressure or to avoid the joining of the cutting edges. This is possible, but with such a structure, if the wire inserted between both dies is located at the edge of the blade, it will be crushed by compression by the dies and partially protrude to the contact surface, resulting in poor cutting. There are drawbacks that can cause

The present invention has been devised to solve the above-mentioned problems with wire cutting machines.In order to prevent the dies from being damaged by forcing the dies to butt against each other, there is a flat reciprocal structure on both sides of the blade. In order to provide a contact surface and to move the wire inward during cutting so that the side edge of the wire does not get caught on this contact surface side, a side wall that slopes and protrudes inward on the blade frame side. It is characterized by the formation of

An embodiment of the present invention will be described below with reference to the drawings. A fixed die 2 is fixed to one end of a substantially C-shaped frame 1, and a movable die 3 is provided at the other end so as to be movable toward and away from the fixed die 2. The back of the moving die is connected to a hydraulic ram 4, which is inserted into a cylinder 5 fixed to the frame. Therefore, the movable die 3 can be moved forward and backward relative to the fixed die 2 by hydraulic pressure.

Both dies 2 and 3 have blades 2a facing each other,
3a, and ribs 2b, 3b on both sides of this blade.
The end faces are flat contact surfaces 2c, 3c that are at the same level as the cutting edge or slightly protrude from this. The ribs 2b and 3b of both dies 2 and 3 on the side of the frame 1 are narrow at the tips and gradually protrude inwardly toward the base, increasing their thickness.

Although the description has been made using an example of a cutter using a hydraulic mechanism as a power source, the cutter die of the present invention can be used not only in this but also in a cutter powered by an electric motor or manually.

When cutting, for example, a contact wire W using the cutter die configured as described above, hold the cutter and place the contact wire W between the fixed die 2 and the movable die 3, Oil is introduced into the cylinder 5, and the movable die 3 is advanced by the ram 4, and works together with the fixed die 2 to cut the overhead contact line.
At this time, the operator usually performs the cutting operation by hooking the frame 1 of the cutter onto the overhead contact line W. That is, in this case, as shown in FIG. 1, the overhead contact line W will be inserted between the two dies 2 and 3 to the deepest point where it contacts the inside of the frame 1. In this state, when the cutting operation of the overhead contact line is started using both dies 2 and 3, the blades 2a and 3a are gradually inserted into the overhead contact wire, and the contact wire is cut into the ribs 2b and 3b as shown in FIG. It is pushed inward along the slope inside the tip. The contact wire is then completely cut at a position slightly inward from the frame side end of the blade 2a.

As described above, in the present invention, in the pair of cutter dies 2 and 3 attached to the substantially C-shaped frame 1 of the wire cutting machine, both ends of the blades 2a and 3a are at the same level as the cutting edge or slightly lower than the cutting edge. The rib 2 on the frame 1 side has ribs 2b and 3b perpendicular to the blade with protruding flat contact surfaces 2c and 3c.
Since the inner surfaces of b and 3b are sloped surfaces that gradually protrude inward from the cutting edge to the base, the contact surfaces 2c and 3c come into contact with each other when cutting the wire, so the cutting edges do not touch each other. There is no risk that they will butt against each other with strong pressure, and therefore the cutting edge will not be crushed even if the stroke of the pressure mechanism is not set very precisely. Furthermore, due to the inclination of the inner surfaces of the ribs 2b and 3b, the wire rod W is pushed toward the center of the blades 2a and 3a during the cutting process.
Even if the cutting operation is performed while the wire is in contact with the
This has the effect that there is no risk of the cutting being pinched between the contact surfaces 2c and 3c and causing poor cutting.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention.
The figure is a front view, Fig. 2 is a front view of the die, Fig. 3 is a plan view thereof, Fig. 4 is a sectional view thereof, Fig. 5 is a perspective view of the die, and Fig. 6 is a front view showing the cutting process. be. 1... Frame, 2... Fixed die, 2a...
Blade, 2b...Rib, 2c...Abutting surface, 3...Moving die, 3a...Blade, 3b...Rib, 3c...Abutting surface, 4...Hydraulic ram, 5...Cylinder, W... …
train line.

Claims (1)

[Scope of utility model claims] A fixed cutter die and a movable cutter die are provided in a substantially C-shaped frame so as to face each other and can be moved toward and away from each other.
A pair of cutter dies for a wire cutting machine that cuts a wire by sandwiching it between the two dies, each having a blade on opposite sides, and both ends of the blade have a protrusion that is at the same level as the cutting edge or slightly more than the cutting edge. The blade has a rib with a flat contact surface and a rib in a direction perpendicular to the blade, and the inner surface of the rib on the frame side is an inclined surface that gradually protrudes inward as it goes from the blade tip to the base of the blade. A cutter die for wire cutting equipment featuring the following.