JPH054113A - Cutter clamping device - Google Patents

Abstract

PURPOSE:To facilitate the replacement of an adjusting member for adjusting the gap of a cutter such as slitter and trimmer. CONSTITUTION:A plurality of piston holes 3 are formed in the longitudinal direction, and a pressing piston 6 is fitted in each piston hole 3, and a spring 7 is fitted between the front edge surface of each piston hole 3 and each pressing piston 6, and a pressing chamber 9 communicating to the rear side chamber of each piston hole 3 is formed, and a pressing piston 10 is fitted into the pressing chamber 9, and the rear side chamber of each piston hole 3 and the pressing chamber 9 are charged with oil, and a screw shaft 12 contacting the pressing piston 10 is installed. When the screw shaft 12 is advanced, the pressing pition 10 is pushed into the pressing chamber 9, and oil is pressurized, and each spring 7 is compressed, and each pressing piston 6 is pushed out to the front side by the uniform force larger than the pushing force of the pressing piston 10, and when the screw shaft 12 is retreated, each spring 7 is extended, and each pressing piston 6 is retreated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter for cutting a wide strip into a plurality of narrow strips, a trimmer for cutting the ears on both sides of the strip, and the like. And a device for tightening the shaft at a desired position on the rotary shaft.

[0002]

2. Description of the Related Art In a slitter, as shown in FIG. 6, two rotary shafts 21 are vertically arranged side by side, and a large diameter retaining portion 22 and a small diameter screw tooth portion 23 are provided at both ends of each rotating shaft 21. ing.

As shown in FIG. 6, a plurality of annular or cylindrical spacing members 24, 25 and a plurality of circles are provided between the retaining portion 22 and the screw tooth portion 23 of each rotary shaft 21, respectively. A thin plate-shaped clearance adjusting member 26, a plurality of circular plate-shaped blades 27, and a single annular blade tightening device 1 are fitted in a predetermined order, and are fitted to the screw teeth 23 of each rotary shaft 21. The nuts 28 are screwed together.

The blade tightening device 1 of each rotating shaft 21 operates to push out a plurality of pressing pistons protruding from the front side surface of each blade tightening device 1 with an equal force to prevent the rotating shaft 21 from coming off. 22 and the spacing members 24 and 2 between the screw teeth 23
5, each gap adjusting member 26, each blade 27, and the blade fastening device 1 are tightened, and each blade 27 of each rotary shaft 21 is arranged at a desired position.

The lower end of each blade 27 of the upper rotary shaft 21,
As shown in FIG. 6, the upper ends of the blades 27 of the lower rotary shaft 21 are adjacent to each other with a desired gap therebetween.

By rotating both rotary shafts 21 in opposite directions, the blade 27 of the upper rotary shaft 21 and the blade 27 of the lower rotary shaft 21 are rotated.
When a wide strip steel plate is inserted between the strips, the steel plate is cut into a plurality of narrow strip steel plates.

A conventional blade tightening device is disclosed in Japanese Patent Publication No. 61-13.
As disclosed in Japanese Patent No. 929, a plurality of piston holes are provided on the front side surface of an annular body, and pressing pistons are fitted into the piston holes, and the front ends of the pressing pistons are respectively attached to the front side surface of the main body. Overhangs.

An oil passage communicating with the bottom of each piston hole and a pressurizing chamber whose tip communicates with the oil passage are provided in the main body, and the pressurizing piston is fitted in the pressurizing chamber. The bottom of each piston hole, the oil passage, and the pressurizing chamber are filled with oil.

A screw hole is provided on the outer peripheral surface of the main body so as to communicate with the base end portion of the pressurizing chamber. A screw shaft is screwed into the screw hole so that the tip of the screw shaft contacts the pressurizing piston of the pressurizing chamber. Touching.

When the screw shaft is rotated and moved forward, the pressurizing piston is pushed into the tip end side of the pressurizing chamber to pressurize the oil, and each pressurizing piston is evenly pressed with a force larger than the pushing force of the pressurizing piston. It is configured to be pushed to the front side of.

[0011]

In the slitter or trimmer as described above, when the thickness or material of the strip to be cut is changed, the blade 27 of the upper rotary shaft 21 and the lower rotary shaft 21 are changed. In order to change the gap between the blades 27, the gap adjusting member 26 is replaced.

When replacing the gap adjusting material 26, the nut 28 is loosened, the gap adjusting material 26 is loosened, gaps are provided on both sides of the gap adjusting material 26, and the gap of the thin circular plate is cut to form the gap adjusting material. 26 is pulled out from the rotary shaft 21. A gap adjusting material having a different thickness is fitted into the gap of the gap adjusting material removed from the rotary shaft 21, and the nut 28 is tightened.

However, the nut 28 is not the same as the spacing member 25.
Since a frictional force acts between the nut 28 and the spacing member 25, a very large force is required to rotate the nut 28. Then, the spanner is engaged with the nut 28 and the arm of the spanner is hit with a hammer. That is, it takes a lot of time and labor to replace the gap adjusting material.

Further, by retracting each pressing piston of the blade tightening device, a gap can be provided on both sides of the gap adjusting member, and the gap adjusting member can be replaced.

However, the blade tightening device does not include a device for retracting the pressing piston. Further, since the pressure piston is tightly fitted in the piston hole in order to prevent the pressurized oil from leaking to high pressure, it is difficult to manually retract the pressure piston.

An object of the present invention is to solve the above conventional problems.

[0017]

According to the present invention, a plurality of piston holes are provided in a front and rear direction in an annular body, and rod holes are respectively penetrated between a front end surface of each piston hole and a front side surface of the body. Pressing pistons with rods protruding forward are fitted into the piston holes, and each piston hole is divided into a front chamber and a rear chamber by the pressing pistons, and the rods of each pressing piston are inserted into the rod holes. Then, project the front end of the rod of each pressing piston to the front side surface of the main body,
Insert a spring into the front chamber of each piston hole and fit each spring between the front end surface of the piston hole and the pressing piston, and in the main body, connect the oil passage communicating with the rear chamber of each piston hole to the oil passage. Each pressurizing chamber with its tip communicating with each other, a pressurizing piston is fitted into the pressurizing chamber, oil is filled in the rear chamber of each piston hole, the oil passage and the pressurizing chamber, and the outer peripheral surface of the main body is pressurized. A screw hole communicating with the base end of the chamber is provided, a screw shaft is screwed into the screw hole, the tip of the screw shaft is brought into contact with the pressurizing piston of the pressurizing chamber, and the screw shaft is moved forward. The oil is pressed into the tip of the pressurizing chamber to pressurize the oil, each pressing piston moves forward, each spring is compressed, and the rod of each pressing piston is pushed forward by the pressing force of the pressing piston by an even force. When the screw shaft is retracted and each spring is extended, There is a with tool clamping device, characterized in that it retracts the rod of the pressing piston has a configuration to retract.

[0018]

In the blade tightening device of the present invention, when the screw shaft is moved forward, the pressurizing piston is pushed into the tip end side of the pressurizing chamber to pressurize the oil, and the pressurizing pistons move forward to move the springs. When compressed, the rod of each pressing piston is pushed out toward the front side of the main body with a uniform force larger than the pushing force of the pressing piston.

That is, in slitters and trimmers,
It is possible to fasten the circular plate-shaped blade to a desired position on the rotary shaft with a large uniform force.

Further, in the blade tightening device of the present invention,
When the screw shaft is retracted, each spring expands, each pressing piston retracts, and the rod of each pressing piston retracts.

That is, in slitters and trimmers,
It is possible to loosen the gap adjusting material that is fastened to the rotary shaft and provide gaps on both sides of the gap adjusting material.

[0022]

In the blade tightening device of the present invention, when the screw shaft is retracted, the rod of each pressing piston retracts. Therefore, in a slitter or trimmer, a gap is provided on both sides of the gap adjusting member to adjust the gap. Easy to replace material.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a blade tightening device 1 of this embodiment has a large number of piston holes 3 provided at equal intervals in a front-rear direction in an annular body 2, and each piston hole 3 The rod hole 4 is concentric with the piston hole 3 between the front end surface of the body 2 and the front side surface of the body 2.

As shown in FIG. 2, each piston hole 3 is fitted with a pressing piston 6 having a rod 5 projecting concentrically toward the front side, and each piston hole 3 is pressed by the pressing piston 6 into the front chamber. The rod 5 of each pressing piston 6 is inserted into each rod hole 4, and the front end of the rod 5 of each pressing piston 6 is projected to the front side surface of the main body 2.

In the front chamber of each piston hole 3,
As shown in FIG. 2 or 5, the spiral spring 7 is fitted and inserted into the rod 5 of the pressing piston 6, and each spiral spring 7 is inserted between the front end surface of the piston hole 3 and the front end surface of the pressing piston 6. It is fitted.

As shown in FIG. 1 and FIG. 2 or FIG. 5, an oil passage 8 communicating with the rear chamber of each piston hole 3 is provided in the main body 2, and as shown in FIG. Is provided with a pressurizing chamber 9 having a circular cross section, and the pressurizing piston 10 is provided in the pressurizing chamber 9.
And the rear chamber of each piston hole 3, the oil passage 8 and the pressurizing chamber 9 are filled with oil. The total cross-sectional area of all piston holes 3 is set to several tens of times the cross-sectional area of the pressurizing chamber 9.

As shown in FIG. 3 or 5, the outer peripheral surface of the main body 2 is provided with a screw hole 11 communicating with the base end of the pressurizing chamber 9.
The screw shaft 12 is screwed into the screw hole 11, and the tip of the screw shaft 12 is in contact with the pressurizing piston 10 of the pressurizing chamber 9.

As shown in FIGS. 3 and 4, a retaining piece 14 is fixed to the opening of the screw hole 11 to which the base end surface of the screw shaft 12 with the hexagonal hole 13 abuts.

A rotary tool such as a torque wrench is engaged with the hexagonal hole 13 of the screw shaft 12, and the screw shaft 1 is rotated by the rotation of the rotary tool.
When 2 is rotated and moved forward, the pressurizing piston 10 is pushed into the tip end side of the pressurizing chamber 9 to pressurize the oil, each pressing piston 6 moves forward and each spiral spring 7 is compressed, and each pressing piston The rod 5 of 6 is pushed out to the front side of the main body 2 with a uniform force.

The force with which the rod 5 of the full pressing piston 6 is pushed out to the front side of the main body 2 is several tens of times the force with which the pressing piston 10 is pushed.

When the screw shaft 12 is retracted, each spiral spring 7 expands, each pressing piston 6 retracts, and each pressing piston 6 is retracted.
The rod 5 is retracted.

When the cutter is clamped at a desired position on the rotary shaft of the slitter by using the cutter tightening device 1 of the present embodiment, as shown in FIG. 6, the retaining portions 22 and the screw teeth of the upper and lower rotary shafts 21 are provided. Between the portions 23, a plurality of spacing members 24,
25, a plurality of gap adjusting members 26, a plurality of blades 27 and one blade tightening device 1 are fitted in a predetermined order, and nuts 28 are screwed into the screw teeth 23 of each rotary shaft 21. , The screw shaft 12 of the blade tightening device 1 of each rotary shaft 21 is rotated and moved forward.

Then, each pressing piston 6 of each blade tightening device 1 advances and each spiral spring 7 is compressed, and the rod 5 of each pressing piston 6 is pushed out to the front side by an even force, so that each rotating shaft 21 of each rotating shaft 21 is pressed. Each spacing member 2 between the retaining portion 22 and the screw tooth portion 23
4, 25, each gap adjusting member 26, each blade 27, and the blade fastening device 1 are tightened, each blade 27 of each rotary shaft 21 is arranged at a desired position, and each blade 27 of the upper rotary shaft 21 is The gap between the blades 27 of the lower rotary shaft 21 has a desired value.

In order to change the gap between the blade 27 of the upper rotary shaft 21 and the blade 27 of the lower rotary shaft 21, when the gap adjusting member 26 is replaced, first, the screw shaft of the blade tightening device 1 is replaced. Reverse 12 to retreat.

Then, the force for advancing each pressing piston 6 of the blade tightening device 1 disappears, and each spiral spring 7 expands,
Each pressing piston 6 retracts and the rod 5 of each pressing piston 6 retracts.

After the pressing pistons 6 of the blade tightening device 1 have retracted, the spacing members 24, 2 fitted to the rotary shaft 21 are provided.
5. The blade 27 and the gap adjusting member 26 are moved along the rotating shaft 21 to provide gaps on both sides of the gap adjusting member 26, and the gap adjusting member 26 in a shape obtained by cutting a thin circular disk is removed from the rotating shaft 21. Pull out. A gap adjusting material having a different thickness is fitted into the gap of the gap adjusting material removed from the rotary shaft 21. Similarly, the gap adjusting members 26 of the rotary shaft 21 are replaced. Then, the screw shaft 12 of the blade tightening device 1 is rotated and moved forward.

Then, each pressing piston 6 of the blade tightening device 1 advances and each spiral spring 7 is compressed, the rod 5 of each pressing piston 6 is pushed out by an equal force, and each spacing member 2 is pressed.
4, 25, each gap adjusting material, each blade 27 and the blade tightening device 1 are tightened, each blade 27 is arranged at a position different from the previous time, and each blade 27 of the upper rotary shaft 21 and the lower rotation. The gaps between the blades 27 of the shaft 21 have different values from the previous values.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a blade tightening device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a circuit diagram of the blade fastening device of the same example.

FIG. 6 is a partial vertical sectional front view of a slitter using the blade fastening device of the same example.

[Explanation of symbols]

1 Tool Tightening Device 2 Main Body 3 Piston Hole 4 Rod Hole 5 Rod 6 Pushing Piston 7 Spiral Spring 8 Oil Passage 9 Pressurizing Chamber 10 Pressurizing Piston 11 Screw Hole 12 Screw Shaft

Claims (2)

[Claims] 1. A plurality of piston holes are provided in an anteroposterior direction in an annular body, and rod holes are respectively penetrated between a front end surface of each piston hole and a front side surface of the body, and each piston hole is provided with a rod. Is fitted with a pressing piston that protrudes to the front side, and each piston hole is divided into a front chamber and a rear chamber by the pressing piston, and the rod of each pressing piston is inserted into each rod hole, and the rod of each pressing piston is inserted. The front end of each piston to the front side of the body, insert a spring into the front chamber of each piston hole, and insert each spring between the front end surface of the piston hole and the pressing piston. An oil passage communicating with the side chamber and a pressurizing chamber whose tip communicates with the oil passage are provided, and a pressurizing piston is fitted in the pressurizing chamber, and oil is supplied to the rear chamber of each piston hole, the oil passage and the pressurizing chamber. Fill and out of the body A screw hole communicating with the base end of the pressure chamber is provided on the peripheral surface, a screw shaft is screwed into the screw hole, and the tip of the screw shaft is brought into contact with the pressure piston of the pressure chamber to advance the screw shaft. The pressurizing piston is pushed into the tip side of the pressurizing chamber to pressurize the oil, each pressing piston moves forward and each spring is compressed, and the rod of each pressing piston is evenly larger than the pressing force of the pressing piston. When the screw shaft is retracted with various forces, each spring expands, each pressing piston retracts, and each pressing piston rod retracts. Attached device. 2. The blade tightening device according to claim 1, wherein the spring is a spiral spring fitted to a rod of a pressing piston.