JPH0131386Y2 - - Google Patents

Description

[Detailed explanation of the invention] <Industrial field of application> The present invention is designed to
To provide a double cut shear capable of cutting and removing unnecessary parts of a strip in one cutting operation without stopping an output line.

<Prior Art> A conventionally used cut shear has a cross-sectional structure as shown in FIGS. In the figure, 1 is the strip; 2 is the support frame; 3 is the upper shear knife; 4 is the lower shear knife; 5 is the upper knife holder; 6 is the lower knife holder; 7 is the arm; 8 is the pivot arm; 9 is the pivot rod: 10, 11, 12, 13 are pins; 14 is a cylinder; 32 is a piston; the upper knife holder 5 and the pivot rod 9 are fixed to the support frame 2; the piston 32 is connected to the arm 8 by the pin 12. has been done. Further, the piston 32, the pivot arm 8, the arm 7, and the bottom knife holder 6 are connected to each other by pins 10, 11, and 12, respectively, and when pressure is supplied to the cylinder 14 and the piston 32 is moved upward, the pivot arm 8 is moved to the pivot rod. The arm 7 is pushed up using the fulcrum 9, the lower knife holder 6 rises accordingly, and the shear knives 3 and 4 cut the strip 1.

<Problems to be solved by the invention> However, the cut shear with the above structure has only one pair of upper and lower shear knives, so when cutting and removing unnecessary parts of the strip, the exit line must be stopped before the unnecessary parts of the strip. However, once the strip is cut, it is necessary to feed the strip a certain length, then stop the strip again and cut it twice, which results in long work stoppage times on the output line, which reduces not only productivity but also yield. There were flaws that made it low.

The present invention was devised in order to solve the above-mentioned drawbacks of the conventional cut shear, which consists of a pair of upper and lower shear knives.
This eliminates the waste of stopping the output line twice to cut one end of the unnecessary part and the other end, and removes the unnecessary part of the strip in one cutting operation. The purpose is to provide a double cut shear that can be performed.

<Means for Solving the Problems> The configuration of the present invention to achieve the above object includes an upper fixed shear knife, and a lower movable shear knife that performs cutting work with the upper fixed shear knife by vertical movement of a piston in the cylinder. In the cut shear, the shear knife is composed of two shear knives arranged at a constant interval, and the lower movable shear knife is capable of guiding the vertical movement of the lower movable shear knife between the knives, and is capable of guiding the vertical movement of the lower movable shear knife. It is characterized in that it is provided with a guide rod means for removing it.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIGS. 2a and 2b are a partially sectional front view and a sectional view taken along the line B--B of the double cut shear of the embodiment, respectively. 2 in the figure is a support frame, and the following members are arranged on the left and right sides of the support frame 2, respectively. That is, the shear knives 3-1, 3-2 forming the upper shear knife: the shear knives 4-1, 4-2 forming the lower shear knife: the upper knife holder 5: the lower knife holder 6: the arm 7: the pivot arm 8: Pivot Rod 9:
Pins 10, 11, 12, 13: Cartridge 1
5, 16, 17: cylinder 18, 19, 20, 1
4-1 and 14-2, the cylinder 14-1 is configured to be able to move up and down by sending pressure to the cylinder 14-2 by a piston not shown, and the cylinder 14-2
is swingably supported on a support frame base via a stand 31 by a support piece 29, a support frame 30, and a pin 13. 21 is a guide rod,
guide rod support frames 25, 26 which are movably inserted in the knife holder 6 and have their tops protruding between the lower shear knives 4-1, 4-2, and the guide rod 21 is swingably connected with pins 22, 23;
It is swingably supported on the base of the support frame by a connecting piece 27. 32 is a piston.

The upper knife holder 5 and the pivot rod 9 are both fixed to the support frame 2, and the cylinder 14-2 is fixed to the base of the support frame 2 via a pin 13. The piston 32, the pivot arm 8, the arm 7, and the lower knife holder 6 are interconnected by pins 11 and 12, respectively, and the piston 32 moves upward by sending pressure into the cylinder 14-1, and the pivot arm 8 is arm 7 with pivot rod 9 as the fulcrum.
, raise the lower knife holder 6, and remove the shear knife 4-1 and the upper shear knife 3.
The structure is such that strip 1 is cut at -1.

When pressure is supplied to the cylinder 14-2, the lower knife holder 6 uses a piston mechanism (not shown) to push up the cylinder 14-1 and the piston 32, further push them up through the pivot arm 8 and arm 7, and push the lower shear knife 4-2 and the upper shear knife 4-2 upward. The structure is such that the strip is cut with a shear knife 3-2.

The guide rod 21 connects the cylinders 14-1 and 1
By lowering the pressure of 4-2 and lowering the piston 32, the lower knife holder 6 is lowered,
The guide rod 21 is the lower shear knife 4-1,
The cut strip is left protruding between the guide rods 21 and 2, and the cut strip is placed on the top of the guide rod 21. The assist plate 24 installed at the top of the guide rod 21 at an angle moves the cut strip out of the work line. It has a structure that allows it to be discharged.

Next, a method of cutting the strip using the double cut shear of the embodiment will be explained.

When cutting and dividing a strip: When cutting and dividing a strip, use cylinder 1.
Activate only 4-1. When the cylinder 14-1 is actuated, the pivot arm 8 uses the pivot rod 9 as a fulcrum to push up the arm 7, thereby pushing the bottom knife holder 6 up along the guide rod 21 to position C-C as shown in FIG. 3-1 and 4-1 scissor the strip 1 from above and below and cut it off.

When cutting and removing unnecessary parts of a strip: When cutting and removing unnecessary parts of a strip,
Both cylinders 14-1 and 14-2 are operated. When both cylinders 14-1 and 14-2 are actuated, the bottom knife holder 6 rises to the D-D position as shown in FIG. -2,4-2
Scissor the strips together and cut and remove the length between the shear knives on the bottom side. The removed strip 1a is sandwiched between the bottom shear knives 4-1 and 4-2, but when the bottom knife holder 6 descends, it is pushed out of the work line by the assist plate 24 on the guide rod 21. .

<Effects of the invention> As is clear from the above explanation, the double cut shear according to the invention can cut and remove unnecessary parts of the strip (welds, etc.) by stopping the output line once. This reduces downtime on the production line. Furthermore, since it not only has the above-mentioned function of cutting and removing unnecessary parts of the strip, but also has a normal strip cutting and dividing function, it can be used as a composite cut shear that can be used according to the purpose. Another advantage is that cutting scrap can be automatically removed by an assist plate provided on the guide rod.

[Brief explanation of the drawing]

Figures 1a and b are a partially sectional front view of a conventional cut shear and a sectional view taken along the line A-A in figure a, respectively, and Figures 2 a and b are a partially sectional front view and a double cut shear according to an embodiment. B-B in figure a
The arrow sectional view, Figures 3 and 4 are Figures 2a and b.
FIG. 2 is a cross-sectional view of essential parts showing the operating state of the double cut shear shown in FIG. In the drawings, 1... strip, 3, 3-1, 3-
2...Upper side fixed shear knife, 4, 4-1, 4
-2...Lower movable shear knife, 5...Upper knife holder, 6...Lower knife holder, 7...Arm, 8...Pivot arm, 9...Pivot rod, 14, 14-1, 14-2...Cylinder ,
21...Guide rod, 24...Assist plate.

Claims (1)

[Scope of utility model registration request] A cut shear consisting of an upper fixed shear knife and a lower movable shear knife that performs cutting work with the upper fixed shear knife by vertical movement of a piston in the cylinder, and the shear knife is composed of two shear knives arranged at a fixed interval from each other. A double cut shear characterized in that a guide rod means is provided between the knives of the lower movable shear knife, which can guide the vertical movement of the lower movable shear knife and remove the cut object.