JPH06285712A - Method and device for fastening cutter - Google Patents

Abstract

PURPOSE:To fasten a cutter without tilting it by extruding pistons of a uniform pressing device with uniform force, pressing center symmetrical positions of a fastening device in the axial direction of a rotary shaft with uniform force, moving the fastening device in the axial direction of the rotary shaft, and arranging the cutter fixed to the fastening device at the desired position of the rotary shaft. CONSTITUTION:The screw shaft 18 of a uniform pressing device 11 is advanced to extrude pressing pistons 14 forward with uniform force. Center symmetrical positions on the rear side face of a fastening device 2 are pressed forward by the spherical front end faces of the pressing pistons 14 along the axial direction of a rotary shaft 1 with uniform force, the fastening device 2 fastened to the rotary shaft 1 with the force weaker than the prescribed fastening force, and the cutter 10 of the fastening device 2 is arranged at the desired position of the rotary shaft 1. The screw shaft 8 of the fastening device 2 is further advanced to increase the force fastening the fastening device 2 to the rotary shaft 1, and the fastening device 2 is fastened with the prescribed fastening force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter, a trimmer or the like in which an annular fastening device having a disc-shaped blade fixed thereto is fitted on a rotary shaft to fasten the blade to a desired position on the rotary shaft. A method and apparatus for tightening.

[0002]

2. Description of the Related Art This type of slitter or trimmer does not have a spacer for holding the interval between blades, and is called a spacerless slitter or spacerless trimmer. -Shaped blades are concentrically fixed to each other, and a plurality of ring-shaped tightening devices are fitted and tightened, and the lower end of each blade of the upper rotary shaft and the upper end of each blade of the lower rotary shaft are respectively set as desired. Adjacent to each other with a gap between them.

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

When the thickness or material of the band-shaped plate to be cut is changed, the tightening position of the blade is changed because the gap between the blade of the upper rotating shaft and the blade of the lower rotating shaft is changed.

When tightening the blade at a desired position on the rotary shaft, the tightening device fitted to the rotary shaft is loosened and moved in the axial direction of the rotary shaft, and the blade fixed to the tightening device is placed at the desired position. Then, the tightening device is tightened to tighten the blade at the desired position.

[0006]

However, in the above-mentioned spacerless slitter or trimmer, when the blade is tightened at a desired position of the rotary shaft, the tightening device fitted to the rotary shaft is used as the shaft center of the rotary shaft. Since the worker manually moves the tightening device by pushing or pulling the tightening device, it takes a lot of time to arrange the blade at a desired position on the rotary shaft.

Further, since it is extremely difficult to manually push or pull the center symmetric position of the tightening device with a uniform force, the tightening device fixed to the blade tilts during the movement, and the blade becomes the axis of the rotary shaft. The blade may be arranged so as not to be orthogonal to the core and inclined, and the blade may be tightened while being inclined with respect to the rotation axis.

Therefore, tightening the blade without tilting it to a desired position on the rotary shaft requires a lot of trouble and is not easy.

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

[0010]

SUMMARY OF THE INVENTION The present invention relates to a slitter, trimmer or the like in which an annular tightening device having a disc-shaped blade fixed thereto is fitted to a rotating shaft to tighten the tightening device. And tighten with a force weaker than the specified tightening force.
A ring-shaped uniform pressing device is fitted and attached to the rotating shaft, and the piston protruding in the axial center direction of the rotating shaft is brought into contact with or close to the tightening device at the center symmetrical position of the uniform pressing device. With a uniform force, press the center-symmetrical position of the tightening device in the axial direction of the rotary shaft with a uniform force, move the tightening device in the axial direction of the rotary shaft, and rotate the blade fixed to the tightening device to the rotary shaft. Is placed at a desired position, and thereafter, the force for tightening the tightening device on the rotating shaft is increased, and the tightening device is tightened with a predetermined tightening force, and the blade is tightened at the desired position on the rotating shaft. It is a tool tightening method.

Further, according to the present invention, in a slitter, a trimmer or the like in which an annular tightening device having a disc-shaped blade fixed thereto is fitted on a rotating shaft to tighten the rotating device, the tightening device is fitted to the rotating shaft to rotate. The ring-shaped uniform pressing device is fitted and attached to the shaft, and the piston protruding in the axial center direction of the rotating shaft is brought into contact with or close to the tightening device at the center symmetrical position of the uniform pressing device, and each piston of the uniform pressing device is attached. When it is pushed out with a uniform force, the center symmetrical position of the tightening device is pushed in the axial direction of the rotating shaft by a uniform force, and the tightening device tightened on the rotating shaft with a force weaker than the specified tightening force moves in the axial direction of the rotating shaft. The blade tightening device is characterized in that it is configured to move to.

[0012]

In the present invention, when the blade is tightened at a desired position on the rotary shaft, the tightening device fitted to the rotary shaft is moved in the axial direction of the rotary shaft by fitting it on the rotary shaft. This is performed by pushing out the pistons at the symmetrical positions in the center of the uniform pressing device with equal force in the axial direction of the rotary shaft.

That is, it is performed by a uniform pressing device, not by hand. Moreover, the center symmetrical position of the tightening device is pushed in the axial direction of the rotary shaft with an even force.

[0014]

In the present invention, when the blade is tightened at a desired position on the rotary shaft, the uniform pressing device is used to move the tightening device fitted to the rotary shaft in the axial direction of the rotary shaft. It does not take much effort.

Further, since the center symmetrical position of the tightening device is pushed in the axial direction of the rotary shaft with a uniform force, the tightening device with the blade fixed does not tilt during movement, and the blade does not tilt with respect to the rotary shaft.

Therefore, it is easy to tighten the blade without inclining it to a desired position on the rotary shaft.

[0017]

[Example] A spacerless slitter equipped with a blade tightening device of this example is an annular tightening device in which two disk-shaped blades are concentrically fixed to two rotating shafts that are vertically aligned. Multiple fits. Place each blade at the desired position on the rotating shaft by tightening each tightening device, and place the desired gap between the lower end of each blade on the upper rotating shaft and the upper end of each blade on the lower rotating shaft. Set up.

As shown in FIG. 1, the blade tightening device of this embodiment has an annular shape which pushes the center symmetrical position of the tightening device 2 to the front side with a uniform force behind the tightening device 2 fitted to the rotary shaft 1. The uniform pressing device 11 and the annular tightening ring 20 for mounting the uniform pressing device 11 on the rotary shaft 1 while preventing the retracting of the uniform pressing device 11 are sequentially fitted.

The tightening device 2 is, as shown in FIGS. 1 and 2,
A cylindrical pressure chamber 4 is concentrically provided close to the inner peripheral surface of an annular main body 3 fitted to the rotary shaft 1, and the tip of the pressure chamber 4 communicates with the outside of the pressure chamber 4 of the main body 3. A pressure chamber 5 for
A pressurizing piston 6 is fitted in the pressurizing chamber 5, and oil is filled in the pressure chamber 4 and the tip side chamber of the pressurizing chamber 5.

On the outside of the pressurizing chamber 5 of the main body 3, as shown in FIGS. 1 and 2, a screw hole 7 communicating with the base end of the pressurizing chamber 5 is provided.
It is provided by opening on the outer peripheral surface of, and the screw shaft 8 is screwed into the screw hole 7,
The tip of the screw shaft 8 is brought into contact with the base end of the pressure piston 6,
Is provided with a hexagonal hole 9 at the base end thereof. On the front side of the body 3,
As shown in FIG. 1, a circular plate-shaped blade 10 is concentrically fixed with bolts.

When a rotary tool such as a torque wrench is engaged with the hexagonal hole 9 of the screw shaft 8 and the screw shaft 8 is rotated and moved forward by the rotation of the rotary tool, the pressurizing piston 6 causes the tip of the pressurizing chamber 5 to move. Is pushed to the side to pressurize the oil in the pressurizing chamber 5, the pressure in the pressure chamber 4 increases, and the inner diameter of the main body 3 decreases, so that the main body 3 fitted to the rotary shaft 1 becomes concentric with the rotary shaft 1. Tightened. When the screw shaft 8 is rotated in the reverse direction, the pressure piston 6 returns, the pressure in the pressure chamber 4 decreases, the inner diameter of the main body 3 increases, and the tightening of the main body 3 is released.

As shown in FIGS. 1 and 3, the uniform pressing device 11 has a ring-shaped main body 12 fitted to the rotary shaft 1 and has a plurality of piston holes 13 centered symmetrically with respect to the front side surface of the main body 12. The pressing pistons 14 are provided along the core direction, the pressing pistons 14 are fitted in the piston holes 13, and the front ends of the pressing pistons 14 project to the front side surface of the main body 12.

As shown in FIG. 1, the main body 12 is provided with an annular oil passage 15 which communicates with the base end of each piston hole 13, and a pressurizing chamber 16 whose tip communicates with the oil passage 15.
A pressurizing piston 17 is fitted in the pressurizing chamber 16, and oil is filled in the base end side chamber of each piston hole 13, the oil passage 15 and the tip end side chamber of the pressurizing chamber 16.

Outside the pressurizing chamber 16 of the main body 12, as shown in FIG. 1, a screw hole 17 communicating with the base end of the pressurizing chamber 16 is provided in the outer peripheral surface of the main body 12, and the screw hole 17 is formed in the screw hole 17. The screw shaft 18 is screwed, the tip of the screw shaft 18 is brought into contact with the base end of the pressure piston 17, and the hexagonal hole 19 is provided at the base end of the screw shaft 18.

When the screw shaft 18 is rotated and moved forward, the pressurizing piston 17 is pushed into the tip end side of the pressurizing chamber 16 to pressurize the oil, and each pressurizing piston 14 is larger than the pushing force of the pressurizing piston 17. It is pushed out to the front side of the main body 12 with a uniform force.

As shown in FIG. 1, the tightening ring 20 has a cylindrical pressure chamber 22 concentrically provided in an annular main body 21 fitted to the rotary shaft 1 in the vicinity of the inner peripheral surface thereof. A pressure chamber 23 whose tip communicates with the pressure chamber 22 is provided outside the pressure chamber 22 of 21, and a pressure piston 24 is fitted into the pressure chamber 23, and the pressure chamber 22 and the pressure chamber 23 at the tip side chamber are provided with oil. Is filled.

As shown in FIG. 1, on the outside of the pressurizing chamber 23 of the main body 21, a screw hole 25 communicating with the base end of the pressurizing chamber 23 is provided on the outer peripheral surface of the main body 21. The screw shaft 26 is screwed, the tip of the screw shaft 26 is brought into contact with the base end of the pressure piston 24, and the hexagonal hole 27 is provided at the base end of the screw shaft 26.

When the screw shaft 26 is rotated and moved forward, the pressurizing piston 24 is pushed into the tip end side of the pressurizing chamber 23 to pressurize the oil in the pressurizing chamber 23, and the pressure in the pressure chamber 22 is increased to increase the pressure in the main body. The inner diameter of 21 is reduced, and the main body 21 fitted to the rotary shaft 1 is tightened coaxially with the rotary shaft 1. When the screw shaft 26 is reversed,
The pressurizing piston 24 returns, the pressure in the pressure chamber 22 decreases, the inner diameter of the main body 21 increases, and the tightening of the main body 21 is released.

In the method of tightening the blade 10 at a desired position on the rotary shaft 1 of the spacerless slitter using the blade tightening device of this embodiment, first, the blade 10 of the tightening device 2 fitted to the rotary shaft 1 is desired. The screw shaft 8 of the tightening device 2 is slightly advanced to tighten the tightening device 2 to the rotating shaft 1 with a force about half the predetermined tightening force.

The uniform pressing device 11 fitted to the rotary shaft 1 is
As shown in FIG. 1, the pressing piston 14 is arranged at a position where the spherical front end surface of the pressing piston 14 contacts the rear side surface of the tightening device 2. As shown in FIG. 1, the tightening ring 20 fitted to the rotary shaft 1 is arranged at a position where its front side surface contacts the rear side surface of the uniform pressing device 11, and the screw shaft 26 is moved forward with a predetermined tightening force. Tighten the rotating shaft 1.

Next, the screw shaft 18 of the uniform pressing device 11 is moved forward to push out the pressing pistons 14 to the front side with an equal force, and the tightening device 2 is formed by the spherical front end surface of each pressing piston 14.
The center symmetric position of the rear side surface is pushed forward by an even force along the axial direction of the rotary shaft 1, and the tightening device 2 is tightened on the rotary shaft 1 with a force weaker than a predetermined tightening force. The blade 10 of the tightening device 2 is moved to the front side along the direction and arranged at a desired position on the rotary shaft 1.

Thereafter, the screw shaft 8 of the tightening device 2 is further advanced to increase the force for tightening the tightening device 2 on the rotary shaft 1, and the tightening device 2 is tightened with a predetermined tightening force.

Then, the blade 10 of the tightening device 2 is rotated by the rotary shaft 1.
1, and the gap between the blade 10 of the upper rotary shaft 1 and the blade 10a of the lower rotary shaft has a desired value, as shown in FIG.

In the blade tightening method of this embodiment, the rotary shaft 1
Since the tightening device 2 fitted to is moved in the axial direction of the rotary shaft 1 by rotating the screw shaft 18 of the uniform pressing device 11, a lot of trouble is not required. Further, the tightening device 2 is tightened on the rotating shaft 1 with a force weaker than a predetermined tightening force, and then the tightening device 2
Since the center symmetric position is pushed by a uniform force in the axial direction of the rotary shaft 1, the tightening device 2 to which the blade 10 is fixed does not tilt during movement, and the blade 10 does not tilt with respect to the rotary shaft 1.

<Modifications> 1) In the embodiment, the tightening device 2 and the tightening ring 20 have a mechanism for tightening them on the rotary shaft 1 by an inner diameter reducing mechanism by hydraulic pressure. To the mechanism.

2) In the embodiment, the uniform pressing device 11
The pressing ring 20 for attaching the
Although it is provided separately from the above, a mechanism for attaching the uniform pressing device 11 to the rotating shaft 1 is attached to the uniform pressing device 11.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side 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.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating shaft 2 tightening device 10 knife 11 uniform pressing device 14 pressing piston

Claims (2)

[Claims] 1. A slitter, a trimmer, etc., in which an annular tightening device to which a disc-shaped blade is fixed is fitted to a rotary shaft for tightening, and the tightening device is fitted to the rotary shaft to obtain a predetermined tightening force. Tighten with a weak force.Also, attach a ring-shaped uniform pressing device by fitting it to the rotating shaft, and bring the piston protruding in the axial direction of the rotating shaft into contact with or close to the tightening device at the center symmetrical position of the uniform pressing device. Then, push out each piston of the uniform pressing device with equal force, and push the center symmetrical position of the tightening device with equal force in the axial direction of the rotary shaft to move the tightening device in the axial direction of the rotary shaft. Place the blade fixed to the device at the desired position on the rotating shaft, and then increase the force to tighten the tightening device to the rotating shaft, tighten the tightening device with a predetermined tightening force, and move the blade to the desired position on the rotating shaft. A tool tightening method characterized by tightening on. 2. A slitter, a trimmer, etc., in which an annular tightening device having an annular disc-shaped blade fixed thereto is fitted and tightened on a rotary shaft. In such a slitter or trimmer, the tightening device is fitted on the rotary shaft, and the rotary shaft is annular. The uniform pressing device is fitted and attached, and the piston protruding in the axial direction of the rotating shaft is brought into contact with or close to the tightening device at the center symmetrical position of the uniform pressing device, and each piston of the uniform pressing device is applied with equal force. When pushed out, the center-symmetrical position of the tightening device is pushed in the axial direction of the rotating shaft by an even force, and the tightening device tightened on the rotating shaft by a force weaker than a predetermined tightening force moves in the axial direction of the rotating shaft. A blade tightening device characterized in that