JPH01199713A - Device for fastening round knife - Google Patents

Abstract

PURPOSE:To dispense with a space holding cylinder and the replacement of a knife at the time of changing a position by pressing a round knife against the end face of the large diameter portion of a knife installing base board by means of a pressing board fitted on the small diameter portion of the base board and fastening same and, then, reducing the inside diameter of a fastening device to install the knife in the desired position of a rotary shaft. CONSTITUTION:At the time of fastening, a round knife C is coaxially fitted on the round-knife fitting portion 16 of the small-diameter portion 12 of a base board 1 and brought into contact with the end face of the large-diameter portion 13 thereof and, by screwingly installing a pressure board 21 on a threaded portion 17, the ends of pressing pistons 24 are brought into contact with the round knife C positioned between the pressing board 21 and the large diameter portion 13. By rotating a threaded shaft 33, a pressure piston 32 is pushed and moved toward the bottom portion side of a pressure chamber 29. Thereupon, the pistons 24 are pressed to the round knife C side with a force scores times the advancing force of the piston 32 and the ends of the pistons 24 press the round knife C against the end face of the large-diameter portion 13 with uniform forces to perform fastening. Then, the fastening device 1, 21 is slidingly fitted on a rotary shaft S and placed in a defined position and, by rotating threaded shafts 8, a piston 7 is pushed and moved to the bottom portion side of a pressure chamber 4. Thereupon, the inside diameter of the base board 1 is reduced coaxially fastening the round knife C fitted on the rotary shaft S.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to a slitter that cuts a wide strip plate into a plurality of narrow strip plates, a trimmer that cuts edges on both sides of a strip plate, etc. , relates to a device for tightening a round knife to a rotating shaft.

<Prior art> In a metal plate slitter that cuts a wide band-shaped plate into multiple narrow 51)-shaped plates, two rotating shafts are arranged in parallel in an I-do, and bearings at both ends of each rotating shaft are connected. A large-diameter retaining portion is formed inside the bearing at one end of each rotating shaft, and a screw portion with a small diameter is provided at the inside of the bearing at the other end of each rotating shaft.

Insert a cylindrical spacing cylinder and a circular plate-shaped round cutter alternately into each rotating shaft from the 11!5g1Jli1 side end, and screw a nut into the screw ILffl of each rotating shaft. A plurality of spacing cylinders and a plurality of round blades are sandwiched between the nut and the retaining part of each rotating shaft, and a plurality of round blades are tightened to the desired spacing on each rotating shaft. Attachment: The lower end of each round cutter on the upper rotating shaft and the lower end of each round cutter on the lower rotating shaft are placed adjacent to each other.

Both rotary shafts are connected to motors and configured to rotate in different directions, and a strip plate is inserted between the round cutter of the upper rotary shaft and the round cutter of the lower rotary shaft during one rotation. The belt-shaped plate is cut into a plurality of narrow belt-shaped plates at the same time.

When changing the cutting width of the strip plate, set the upper rotation axis to 1=
51. Separate the round blades on the upper rotating shaft and the round blades on the lower rotating shaft, remove the bearings from the bearings on the II11tM side of each rotating shaft, and screw them into the 111 & j parts of each rotating shaft. Untwist and remove each nut, and remove the spacer and round blade from each rotating shaft.

On the other hand, a required number of spacing cylinders having a length corresponding to the new cutting width of the strip plate is prepared.

Then, a spacer holding cylinder and a round knife with a length corresponding to the new cutting width of the strip plate are inserted into each rotating shaft at the intersection of 7F,
Screw a nut into the threaded part of each rotating shaft and tighten.
A plurality of spacing cylinders and a plurality of round knives are sandwiched between the nut and the retaining part of each rotating shaft, and the plurality of round knives are placed on each rotating shaft at intervals corresponding to the new cutting width of the strip plate. Tighten and install, fit the bearings into the bearings on the threaded part of each rotating shaft, and install them, lower the upper rotating shaft, and - rotate the lower end and lower side of each round blade on the upper rotating shaft. Place the upper ends of each round knife on the shaft adjacent to each other.

<Problems to be Solved by the Invention> However, in the slitter as described in (1), when changing the tightening position of the round knife in order to change the cutting width of the shaped plate, the new spacing must be adjusted as described above. It is necessary to prepare a large number of holding cylinders and to insert the interval holding cylinders and round blades for each rotating shaft, which requires a great deal of effort.

Recently, there has been an increase in the production of a wide variety of products in small quantities, and the cutting width of the strip plate has to be changed more frequently, so there is an increasing need to reduce the effort required to change the tightening position of the round knife.

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

Means for Solving the Problems> The present invention provides a device for tightening a circular cutter C in the form of a circular plate to a rotating shaft S, as illustrated in FIG. The base l is configured to be tightened to the rotating shaft S by reducing its inner diameter.

A small diameter part 12 with a small outer diameter and a large diameter part 13 with a large outer diameter are provided on the base l, and a circular plate-shaped round cutter C is formed.
It is configured so that it fits into the small diameter part 12 of the base plate l and comes into contact with the end face of the large diameter part 13 of the base plate l.

It is characterized by having a configuration in which an annular pressing plate 21 is fitted and attached to the small diameter portion 12 of the base l, and the round cutter C is pressed against the end face of the large diameter portion 13 of the base 1 by pressing force ff121 to tighten it. This is a round knife tightening device.

Kusaku Kawa> When tightening a circular plate-shaped round knife C to a rotating shaft S using the round knife tightening device 211, 21 of the present invention, as illustrated in FIG. is fitted into the small diameter part 12 of the base ff1l and comes into contact with the end face of the large diameter part 13 of the base l, and the press plate 21 is fitted and attached to the small diameter part 12 of the base it, and the press i2 is pressed.
1 to press and tighten the round cutter C against the end face of the large diameter portion 13 of the base l.

Next, a round knife tightening device l tightens the round knife C.

21 is slidably fitted onto the rotating shaft S and placed at a desired position, and the base l of the round knife tightening device is tightened onto the rotating shaft S by reducing its inner diameter.

That is, the round knife tightening device 1°21 that tightens the round knife C is tightened at a desired position on the rotation axis S, and the round knife C is tightened on the rotation axis S.
Noto 9! It is tightened in position.

When changing the tightening position of the round knife C tightened to the rotating shaft S using the round knife tightening device 1.21 of the present invention, restore the inner diameter of the base l of the round knife tightening device □ and tighten the round knife C. Release the tightening between the base l of the device and the rotating shaft S, slide the round knife tightening device 1゜21 loosely fitted onto the rotating shaft S and move it to a new position, and tighten the base l of the round knife tightening device so that its inner diameter is Reduce and tighten to new position with rotations 41+S.

Effects of IJI for IJI> In the round knife tightening device for IJJ for IJI, when changing the tightening position of a round knife that has been tightened to one rotation axis, as in the conventional technology, a new spacing cylinder is prepared. There is no need to install a spacing cylinder for the rotating shaft and a round knife, so there is no need for much effort.

<Example> As shown in Fig. 1, the round knife tightening device of this example is a device that tightens a circular plate-shaped round knife C by fitting it onto a rotating shaft S having a circular cross section. It consists of a base l and a pressing plate 21.

As shown in FIGS. 1 and 2, the base 1 has a main body 2 formed into an annular shape that slides onto a rotating shaft S having a circular cross section, and a cylindrical pressure chamber along the inner peripheral surface of the main body 2. 3 are formed concentrically,
When the pressure in the pressure chamber 3 increases, the thin wall portion between the inner circumferential surface of the main body 2 and the inner circumferential surface of the pressure chamber 3 curves inward, so that the inner diameter of the main body 2 is reduced.

As shown in FIG. 2, holes each having a circular cross section are formed in the outer circumferential surface of both sides of the main body 2, and the bottom portions of the six holes are formed into pressurizing chambers 4, and each hole is connected to a The opening side portions are each formed into a screw hole 5, the bottom of each pressurizing chamber 4 is communicated with the pressure chamber 3 through a large passage 6, and a pressurizing piston 7 is slidably fitted into each pressurizing chamber 4 to control the pressure. The chamber 3, both front pressure chambers 4, and both passages 6 are filled with oil, a screw shaft 8 is screwed into each screw hole 5, and the tip of each screw shaft 8 is connected to each pressure piston 7.
A hexagonal hole 9 is provided at the base end of each screw shaft 5.

As shown in FIGS. 1 and 2, the opening position of each screw hole 5 has a slotted hole in which the base end with the hexagonal hole 9 of the screw shaft 8 is in contact.
The L piece 10 is fixed with a pole) 11.

A rotary tool such as a torque wrench is engaged with the hexagonal hole 9 of the screw shaft 8 exposed on the outer peripheral surface of the main body 2, and the screw shaft 8 is rotated by the rotation of the rotary tool, and pressure is applied by the screw shaft 8 spiraling. When the piston 7 is pushed toward the bottom of the pressurizing chamber 4, the pressure in the pressure chamber 3 increases, the inner diameter of the main body 2 is reduced, and the main body 2, which is loosely fitted around the rotating shaft S, becomes concentric with the rotating shaft S. It has a tight structure.

When the screw shaft 8 is reversed, the pressure piston 7 pushed by the screw shaft 8 returns, the pressure in the pressure chamber 3 decreases, the inner diameter of the main body 2 expands, and the tightness between the main body 2 and the rotating shaft S is released. The configuration is as follows.

As shown in FIG. 1, the main body 2 has one end formed into a small diameter portion 12 with a small outer diameter, and the other end formed with a large diameter portion 12 with a large outer diameter. 3, and on the large diameter portion 13 side portion of the small diameter portion 12,
Key 1 that fits into the key groove on the inner periphery of the circular plate-shaped round knife C
4 with a pole) 15, and the part on the large diameter part 13 side of the small diameter part 12 is formed into a round knife fitting F'l616, and the round knife C is fixed with 15.
The round knife fitting part 16 of the small diameter part 12 of the main body 2 is configured to concentrically fit into the round knife fitting part 16 of the small diameter part 12 of the main body 2 and abut against the end surface of the large diameter part 13 of the main body 2. The other portions are formed into threaded portions 17.

The pressing force i21 is applied to the main body 22 as shown in FIGS. 1 and 3.
is formed into an annular shape that is screwed into the threaded part 17 of the small diameter part 12 of the base l, and the main body 2 faces the end surface of the large diameter part 13 of the base l.
A plurality of piston holes 23 are formed at equal intervals along the axial direction in the end face of the piston 2, and a pressing piston 24 is slidably fitted into each piston hole 23.

The main body 2 facing the end surface of the large diameter portion 13 of the tiffil
As shown in Figures 1, 3 and 4, the end face of 2 has
The circular plate-shaped attachment plates 25 are overlapped and fixed with a large number of bolts 26, and the small diameter front end of each pressing piston 24 is
Insert into the small diameter piston hole 27 provided through the toma g25,
It protrudes from the cover plate 25 toward the end surface side of the large diameter portion 13 of the base fit.

As shown in FIGS. 1, 3 and 4, the main body 22 includes:
An annular oil passage 28 communicating with the bottom of each piston hole 23
is formed.

As shown in FIGS. 3 and 4, holes each having a circular cross section are formed in the outer peripheral surface of both sides of the main body 22, and the bottom portions of each of the six holes are formed into pressurizing chambers 29. , the opening side portions of the six holes are each formed into a screw thread 30, the bottom of each pressurizing chamber 29 is communicated with the oil passage 28 through a narrow passage 31, and a pressurizing piston 32 is slidably fitted into each pressurizing chamber 29. Then, each piston hole 23, oil passage 28, both front pressure chambers 29, and both passages 31 are filled with oil, and each screw 30 is fitted with a screw shaft 33.
are screwed into each other, so that the tip of each screw shaft 33 abuts the nozzle end of each pressure piston 32, and a hexagonal hole 34 is provided at the base end of each screw shaft 33, respectively.

As shown in FIGS. 1 and 3, at the opening position of each screw 30, a retaining piece 35 is fixed with a port 36, with which the base end of the screw shaft 33 with the hexagonal hole 34 comes into contact.

The total cross-sectional area of all the piston holes 23 of the main body 22 is the pressure chamber 29
The hydraulic pressure intensifier circuit is configured with a cross-sectional area several tens of times larger than the cross-sectional area of the hydraulic pressure booster circuit.

A rotary tool such as a torque wrench is engaged with the hexagonal hole 34 of the screw shaft 33 exposed on the outer peripheral surface of the main body 22, and the screw shaft 33 is rotated by the rotation of [Jt-], and the screw shaft 33 is screwed. When the pressurizing piston 32 is pushed toward the bottom of the pressurizing chamber 29, the above-mentioned pressure increasing circuit is activated, and the pressurizing piston 24 increases the forward force of the screw shaft 33 and the number of forward forces of the pressurizing piston 32 on its tip side. It is configured to be pressed with ten times the force.

When tightening the round knife C by fitting it onto the rotating shaft S of a slitter or trimmer using the round knife tightening device of this example, as shown in Fig. 1, the round knife C is Small diameter part 12
The press plate 21 is fitted concentrically into the round knife fitting part 16 of the base l and comes into contact with the end face of the large diameter part 13 of the base l, and then the press plate 21 is screwed into the threaded part 17 of the small diameter part 12 of the base l. and attach the tip of each press piston 24 protruding from the end face of the press i21 to the press plate 2.
1 and the large diameter portion 13 of the base.

Then, a rotary tool such as a torque wrench is engaged with the hexagonal hole 34 of one of the screw shafts 33 exposed on the outer circumferential surface of the press i21, and the screw shaft 33 of the press if is rotated to advance the screw shaft 33. The pressurizing piston 32 is pushed toward the bottom side of the pressurizing chamber 29.

Then, the pressure increasing circuit of the press i21 is activated, and the press piston 24 is pressed toward the round cutter C side with the forward force of the screw shaft 33, which is tens of times the forward force of the press piston 32, and each press piston 24 The tip of the round knife C is pressed and tightened against the end surface of the large diameter portion 13 of the base l with an even force.

After the round knife C is concentrically tightened by the round knife tightening device m 1 + 21, the round knife tightening device 1.21 is slid onto the rotating shaft S and placed at a desired position.

Next, a rotary tool such as a torque wrench is engaged with the hexagonal hole 9 of one of the screw shafts 8 exposed on the outer peripheral surface of the large diameter portion 13 of the base 1, and the screw shaft 8 of the base 1 is rotated. The pressurizing piston 7 is pushed toward the bottom side of the pressurizing chamber 4 by the spiral movement of the screw shaft 8 .

Then, the pressure in the pressure chamber 3 of the base 21 increases, the inner diameter of the base 1 decreases, and the board 1, which had been loosely fitted onto the rotating shaft S, is now fitted onto the rotating shaft S and tightened concentrically. do.

That is, the round knife tightening device 1.21 tightens the rotating shaft S, and the round knife C tightened by the round knife tightening device 1.21 tightens the rotating shaft S.
are tightened in a concentrically fitted state at the desired position.

A required number of round knives C are similarly tightened on each of the upper and lower rotating shafts S of the slitter or trimmer using the round knife tightening devices 1 and 21 of this embodiment.

In a slitter or trimmer, when changing the tightening position of the round cutter C in order to change the cutting width of a strip plate, one of the screw shafts 8 of the base file is reversed.

Then, due to the reverse rotation of the screw shaft 8 of the base l, the pressure piston 7
returns, the pressure in the pressure chamber 3 decreases, and the inner diameter of the base 1 expands.1. tsii and the rotating shaft S are released.

After the tightening of the round knife tightening device 1.21 and the rotating shaft S is released, the round knife tightening device 1.21 loosely fitted on the rotating shaft S is slid and moved, and the round knife tightening device 1.21 is moved. The round cutter C that has been tightened is placed at a new tightening position on the rotating shaft S.

Then, the screw shaft 8 of %il is rotated in the normal direction.

Then, (the pressure in pressure chamber 3 of panel L increases) g
The inner diameter of the board 1 has been reduced, and the base i that was fitted on the rotation axis S
t is tightened concentrically with the rotating shaft S, and the round knife tightening device 1.
21 is tightened to the rotating shaft S, and the round knife C that is tightened by the round knife tightening device 1.21 is concentrically tightened to the new tightening position of the rotating shaft S.

In the round knife tightening devices 1 and 21 of this example, when changing the tightening position of the round knife C tightened to the rotating shaft S, a large number of new spacing cylinders are prepared as in the conventional technology, and each rotation There is no need to replace the shaft spacing cylinder and the round knife, and it does not take much effort.

Therefore, the effort required to change the tightening position of the round knife C is reduced, so that the time required to change the cutting width of the strip plate in the slitter or trimmer can be shortened, and the operating rate can be increased.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view of a round knife tightening device according to an embodiment of the present invention. FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1. FIG. 3 is a sectional view taken along the line m--■ in FIG. 1. FIG. 4 is a sectional view taken along the line rV-IV in FIG. 3. C: Round knife S: Rotating axis l: Base 3: Pressure chamber 4: Pressure chamber 5
: Threaded hole 7 : Pressurizing piston 8 : Threaded shaft 12 : Small diameter part 13 : Large diameter part 21 :
Pressing plate 23: Piston hole 24: Pressing piston 28: Oil passage 29: Pressurizing chamber 3
0: fi hole 32: pressure piston 33
: Spiral shaft patent applicant Yoshida Shokai Co., Ltd.

Claims (1)

[Claims of Claims] 1. A device for tightening a circular cutter in the form of a circular plate to a rotating shaft, which comprises: an annular base that slides on the rotating shaft; the inner diameter of the circular base is reduced so that the base is tightened to the rotating shaft; , a small diameter part with a small outer diameter and a large diameter part with a large outer diameter are provided, and the circular plate-shaped round cutter is configured to fit into the small diameter part of the base and abut against the end surface of the large diameter part of the base, A round knife tightening device characterized in that an annular pressure plate is fitted and attached to a small diameter portion of a base, and the press plate presses and tightens a round knife against an end face of a large diameter portion of the base. 2 In a device for tightening a circular cutter in the form of a circular plate to a rotating shaft, a pressure chamber is formed along the inner circumferential surface of a circular base that slides onto the rotating shaft, and a pressure chamber is connected to the base and is connected to the pressure chamber. A pressure chamber is formed, a pressurizing piston is slid into the pressurizing chamber, the pressure chamber and the pressurizing chamber are filled with oil, a screw hole communicating with the pressurizing chamber is provided on the outer surface of the base plate, and a screw hole is installed in the screw hole. The screw shaft is screwed in, the tip of the screw shaft contacts the pressure piston of the pressurizing chamber, and the base end of the screw shaft can be engaged with a rotary tool, and the rotary tool engaged with the screw shaft of the base is rotated. The screw shaft is threaded to push the pressurizing piston, increasing the pressure in the pressure chamber of the base, reducing the inner diameter of the base, and tightening the base to the rotating shaft. A circular plate-like round cutter is configured to fit into the small diameter part of the base and come into contact with the end face of the large diameter part of the base, and the small diameter part of the base has a large diameter part with a large outside diameter. Fit and install an annular pressing plate, provide a plurality of piston holes in the end face of the pressing plate on the base large diameter side, slide a pressing piston into each piston hole, and attach the tip of each pressing piston to the base large diameter. It protrudes from the end face side of the diameter part and is attached to the press plate.
An oil passage communicating with the bottom of each piston hole is provided, a pressurizing chamber communicating with the oil passage is formed in the press plate, a pressurizing piston is slidably fitted into the pressurizing chamber, and each piston hole is connected to the oil passage and pressurizing chamber is formed in the press plate. The pressure chamber is filled with oil, a screw hole is provided on the outer surface of the press plate that communicates with the pressure chamber, a screw shaft is screwed into the screw hole, and the tip of the screw shaft is brought into contact with the pressure piston. A rotary tool can be engaged with the base end of the press plate, and the rotation of the rotary tool that is engaged with the screw shaft of the press plate causes the screw shaft to move and push the pressure piston, and the press piston of the press plate is moved to the small diameter of the base. 1. A round knife tightening device characterized by being configured to tighten a round knife fitted to a base by pressing the round knife against an end face of a large diameter part of a base.