JPH0899287A - Two pairs of double blade - Google Patents

Abstract

PURPOSE: To provide a double blade by which continuous cutting can be smoothly carried out without disturbing continuous feeding in cutting of a wire material. CONSTITUTION: In each of two pair of double blades, an upper edge and a lower edge slide with each other so as to carry out slide cutting, and in two upper blades 10, 10, sliding faces 11, 11 are positioned in the same plane in the same direction while their edge points 10a, 10b are opposed to each other at a proper interval. When one lower blade 20 is slid with the sliding face and carries out relatively reciprocating motion between the upper blades 10, 10 while two edge points 20a, 20b are arranged back to back with each other, the whole of a blade body 24 of the lower blade passes the edge point of the upper blade in both end positions of the reciprocating motion, and as a result, mutual sliding cutting is carried out at two pairs of edge points.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-blade for cutting continuously fed wire, rod or long plate.

[0002]

2. Description of the Related Art In various production processes, there are cases where wire rods, rods, etc. are cut into pieces so as to be chopped from the ends. For example, a wire rod that has been discharged in wire electric discharge machining is shredded for disposal, or a large number of wire rod-shaped runners remaining during plastic injection molding are shredded for disposal.
In addition, a relatively long bar or a long plate may be cut into a relatively short member and used as a member to be processed in the next step.

One of the methods of cutting and shredding is
There is a method of cutting a wire or the like from the end by scraping with a two-blade. At the time of cutting, these wire rods, rods or long plate materials (hereinafter, typically referred to as "wire rods") are continuously fed to two blades and cut with two blades that reciprocate without a true break. Go on.

[0004]

However, since the cutting is performed by closing the two blades at the time of cutting, the closed blade hinders continuous feeding of the wire for a short time until the blade is opened again. become. If the wire is soft, you can escape the part that is obstructed by bending. But,
If it is hard, it will not be able to escape like this and it will hit the blade, hindering the operation of the two blades or causing a malfunction. If the wire is brittle, the wire may be chipped or broken. In order to avoid these problems, there is a method of reducing the speed of the wire fed into the double blade. Alternatively, there is a method of speeding up the reciprocating motion of the two blades. In addition, each time it is cut without continuous feeding,
There is a method of temporarily stopping the wire rod. However, when the wire rod is fed at a low speed, the processing efficiency is lowered, and the speed of the reciprocating movement of the two blades is limited, and the failure rate is increased and the cutting performance is lowered. Further, once the wire rod is stopped, the processing efficiency is lowered and the device becomes complicated. In view of the above problems, it is an object of the present invention to provide a two-blade blade that can smoothly cut a wire without hindering continuous feeding.

[0005]

As a means for solving the above-mentioned problems, the invention according to claim 1 is "two sets of two blades which perform sliding cutting by sliding the upper blade and the lower blade together. Two
The two upper blades have their mating surfaces in the same plane and in the same direction, and the blade tips are positioned facing each other at appropriate intervals.
When the two lower blades are provided with two blade tips back to back and slide relative to each other on the sliding surface to relatively reciprocate between the two upper blades, the blades of the lower blades at both end positions of the reciprocating movement. The whole body passes through the cutting edge of the upper blade so that two pairs of cutting edges alternately cut through the cutting edge. "

The cutting edge may have any shape, but if it is a straight line, it is easier to manufacture and polish the cutting tool as compared with an arcuate cutting edge. If necessary, an arcuate blade edge may be used as shown in FIG. 2, whereby the wire rod can be prevented from leaching out from the blade span and can be brought close to the center of the blade span. Further, the cutting edge angle may be selected according to the physical properties of the wire material, but when it is used for a hard material such as metal or plastic, a cutting edge angle of substantially right angle may be used. Further, the whole blade blade body of the lower blade passes through the blade tip of the upper blade at each reversing position of the reciprocating motion, so when viewed from the upper blade side, it is hidden by the upper blade and the blade body is invisible. Become. The "lower blade" refers to the entire single member forming the blade, and the "blade blade" refers to a member in the vicinity from the blade edge directly involved in cutting to the back-to-back blade edge.

The invention according to claim 2 is the invention according to claim 1, wherein "the two upper blades are integrally formed by a plate-shaped upper blade member having one hollow on the plate surface, The cutting edge of the upper blade is formed by facing inner sides forming this hollow,
The lower blade is made of a plate-shaped lower blade material having two hollows on the plate surface, the blade body is made of an intermediate member between the two hollows, and the cutting edge of the lower blade is made of the intermediate member. "It consists of the inner sides that are back-to-back." As shown in FIG. 3, the hollow shape may be rectangular, circular, or any other shape as long as the inner side of the intermediate member forms the cutting edge. .

[0008]

By adopting the above means, according to the invention of claim 1, immediately after the cutting, the whole blade blade body of the lower blade passes through the blade tip of the upper blade, so that the lower blade opens the passage of the wire. , So it does not prevent continuous feeding. According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the two upper blades are integrally formed by the plate-shaped upper blade member, so that the sliding surface of the upper blade becomes a single surface. . Further, since the lower blade is a plate-shaped lower blade material, the peripheral edge portion of this lower blade material facilitates and surely overlaps and slides with the upper blade material.

[0009]

EXAMPLES A wire rod cutting machine incorporating the examples of "two sets of two blades" described in claims 1 and 2 will be described below. Cutting machine 1
As shown in FIG. 4, the box-like appearance has a box-shaped appearance, and an intake port 2 for the wire 3 is provided on the top thereof, and a take-in roller for the wire 3 (not shown) is provided inside the bottom 3 of the cutting machine 1.
Is provided with a blade block portion 100 that cuts the wire rod 4 into cut pieces 5 and discharges them. The blade block 100 is provided when the cutting machine 1 is in operation.

As shown in FIG. 5, the blade block portion 100 is attached so that the upper blade 10 and the lower blade 20 are superposed so that they can be slid off. It can be cut by the horizontal reciprocating motion of the lower blade 20. Details of the blade block unit 100 are as follows.

First, as shown in FIG. 3, the upper blade 10 comprises a plate-shaped upper blade member 30 to form a substrate of the blade block portion 100,
The center thereof forms a hollow 31 that is hollowed out into a substantially rectangular shape, and two inner sides 30a and 30b facing each other of this substantially rectangular shape are the cutting edges 10a and 10b of the upper blade.

The lower blade 20 is also made of a plate-shaped lower blade material 40, and at the center thereof, hollows 41, 41 are formed by hollowing out two substantially rectangular shapes having substantially the same shape, and the boundary between these two hollows is formed. The intermediate member 42 is provided. This intermediate member constitutes the blade 22 of the lower blade, and the inner sides 40a and 40b thereof are the blade tip 20 of the lower blade.
a and 20b. And the lower blade 20 is the upper blade 1
0, and the cutting edges 10a, 20a; 10b, 20b are arranged in parallel and correspond to two pairs. Then, on the two sides of the upper blade member 30, ridges are provided in the sliding direction of the lower blade member 40 to form the rail portion 32.
Further, as shown in FIG. 5, the lower blade 20 is slidably superposed on the rail portion 32 by a blade stopper 33 applied from below. This lower blade 20 has a vertical rotary drive shaft 50.
And a link member 51 for reciprocating movement, and two pairs of cutting edges 1 facing each other by the upper blade 10 and the lower blade 20.
With 0a, 20a; 10b, 20b, it is possible to cut twice in one reciprocation.

Two sets of two blades 1 having the above-described structure
The cutting work by the cutting machine 1 incorporating 0 and 20 is as follows. First, the cutting machine 1 shown in FIG. 4 is turned on, and the wire 4 is manually inserted from the intake port 2 into the cutting machine 1. Then, the wire rod 4 is taken in by the take-in roller inside, and the tip of the wire rod 4 is sent to the lower blade block portion 100. The lower blade 20 is always operated by reciprocating movement when the power is turned on. The lower blade 20 overlaps with the upper blade 10. However, the upper blade is integrally formed by the plate-shaped upper blade material, so that the sliding surface of the upper blade becomes a single surface, and sliding and cutting are surely performed. Be seen. And, the blade body 22 of the lower blade is the blade edge 10a, 10 of the upper blade.
It reciprocates between b and therefore, as shown in FIG.
It can be cut back and forth twice. At this time, the lower blade 2
At 0, at the reversal position of both ends of the reciprocating motion, the whole body of the blade passes through the blade edge of the upper blade, so that continuous feeding of the wire is not hindered even immediately after cutting.

The present invention is not limited to the above embodiment. The sliding of the blade may be performed by moving either the upper blade or the lower blade, or both. Further, the orientation of the blade is not limited to the horizontal orientation as in the embodiment, but may be vertical as long as it does not hinder cutting.

[0015]

As described above, according to the invention of claim 1 of the present application, since the whole body of the lower blade passes through the cutting edge of the upper blade immediately after cutting,
The lower blade does not prevent continuous feeding of the wire. Therefore, unlike the conventional two-blade, the closed blade immediately after cutting does not interfere with the continuously fed wire. Therefore, the wire rod does not hit the blade to hinder the operation of the two blades or cause a failure. In addition, the wire is not chipped or broken. Further, according to the two sets of two blades of the present invention,
The speed of the wire rod fed in can be made faster than before. Furthermore, since the blade can be cut twice in one reciprocation, the blade can be reciprocated twice as fast as the conventional one. Of course, it is not necessary to temporarily stop the wire rod each time it is cut. According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the two upper blades are integrally formed by the plate-shaped upper blade member, so that the sliding surface of the upper blade becomes a single surface, Both sliding and cutting are performed reliably. That is, it is not necessary to align the sliding surfaces of the upper blades on the same plane as compared with the case where two individual upper blades are provided. Therefore, the structure is simplified, and the engagement of the cutting edges is ensured. Moreover, since the hollow of the upper blade material plays the role of the guide groove of the wire rod, the fed wire rod is always guided to the blade tip and prevented from coming off from the blade tip.

[Brief description of drawings]

FIG. 1 is a view for explaining “two sets of two blades” of the invention according to claim 1;

FIG. 2 is a diagram for explaining “two sets of two blades” of the invention according to claim 1;

FIG. 3 is an exploded perspective view of “two sets of two blades” of the embodiment.

FIG. 4 is a perspective view of a cutting machine incorporating the “two sets of two blades” shown in FIG.

FIG. 5 is a perspective view of a blade block portion in which “two sets of two blades” shown in FIG. 3 are incorporated.

FIG. 6 is a schematic diagram showing a state in which a wire is cut by the “two sets of two blades” shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting machine 4 Wire material 10 Upper blade 10a, 10b Blade edge of upper blade 11 Sliding surface of upper blade 20 Lower blade 20a, 20b Blade edge of lower blade 22 Blade body 30 Upper blade material 30a, 30b Inner side 31 of upper blade 31 Hollow 32 Rail part 33 Blade stop material 40 Lower blade material 40a, 40b Inner side of lower blade material 41 Hollow 42 Intermediate member 50 Drive shaft 100 Blade block part

Claims (2)

[Claims] 1. Two sets of two blades for cutting by sliding between an upper blade and a lower blade, the two upper blades (10, 10) having their sliding surfaces (11, 1).
1) with the same plane and the same orientation, and positioning the blade edges (10a, 10b) facing each other at appropriate intervals, and one lower blade (20) has two blade edges (20a, 20b)
Are provided back to back, and when the two reciprocating movements are made between the two upper blades (10, 10) by sliding on the sliding surface (11, 11), the lower blades are provided at both end positions of the reciprocating movement. (20)
The two blades of two sets are characterized in that the entire blade body (24) of (1) passes through the blade edge of the upper blade, so that the blade blades are alternately slid at two blade edges (10a, 20a; 10b, 20b). 2. The two upper blades (10, 10) are integrally formed by a plate-shaped upper blade member (30) having one hollow on the plate surface, and the blade tips (10a, 10b) of the upper blades. Is composed of facing inner sides (30a, 30b) forming the hollow, and the lower blade (20) is composed of a plate-shaped lower blade member (40) having two hollows on the plate surface, (24) is composed of an intermediate member (44) between the two hollow boundaries, and the cutting edges (20a, 20b) of the lower blades are formed by the intermediate member (4).
The two sets of two blades according to claim 1, characterized in that they are formed by the back-to-back inner sides (40a, 40b) of 4).