JP2008030134A - Drum shear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum shear capable of easily replacing a knife. <P>SOLUTION: The drum shear includes a pair of rotating drums 2 provided to be rotatable oppositely across a strip S which is being carried, a groove 8 extending in an axial direction of a rotating drum 2 on the outer peripheral surface of the drum 2, a knife 9 detachably provided in the groove 8, a wedgelike fixing block 10 for fixing the knife 9 to the drum 2, a bolt 13 having one end coupled with the fixing block 10 and the other end coupled with the rotating drum 2 thereby applying pressing force to the knife 9 via the block 10, and a cylinder 19 concentrically provided with the bolt 13 in the drum 2 and stretching a cylinder rod 20 by means of hydraulic pressure when the bolt 13 is loosened, thereby releasing the pressing force to move the fixing block 10 outward from the groove 8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drum shear capable of easily exchanging a knife provided on a rotating drum.

  A production line for a strip such as a steel plate is provided with a drum shear that shears the continuously transported strip in a direction substantially orthogonal to the transport direction. The drum shear is equipped with a rotatable rotating drum with a knife attached to the outer peripheral surface above and below the strip line. The rotating drums are rotated in reverse and synchronized with the transport speed of the strip. By doing so, the strip can be sheared.

  In general, the knife is fixed to the rotating drum in the drum shear as described above by using a bolt penetrating the rotating drum by fixing the knife with a wedge-shaped fixing block in a groove provided on the outer peripheral surface of the rotating drum. This is possible by binding the fixed block. On the other hand, the knife can be removed by loosening the bolt and moving the fixed block with the piston rod using the cylinder provided in the rotating drum.

  Such a conventional drum shear is disclosed in Patent Document 1, for example.

JP 2000-237916 A

  However, in the conventional drum shear, since the cylinder is provided below the center part of the fixed block, at the time of unclamping, only the center part of the fixed block is pressed by the piston rod, and the fixed block can be pushed up smoothly. Can not. As a result, there is a risk of causing galling between the fixed block and the adjacent member. In addition, two bolt holes and one cylinder hole are formed per fixed block. When a knife is fixed to a rotary drum with a plurality of fixed blocks, the rigidity of the rotary drum is determined. Will fall. In addition, the number of processing steps is increased, which may lead to an increase in cost.

  Accordingly, an object of the present invention is to solve the above-described problems, and to provide a drum shear capable of easily exchanging knives.

A drum shear according to a first invention for solving the above-described problems is as follows.
A pair of rotating drums rotatably provided so as to be opposed to each other across the belt plate to be conveyed;
A groove extending in the axial direction of the rotating drum on the outer peripheral surface of the rotating drum;
A knife detachably disposed in the groove;
A wedge-shaped fixing block for fixing the knife to the rotating drum;
A bolt for applying a pressing force to the knife via the fixed block by one end being connected to the fixed block and the other end being connected to the rotating drum;
It is provided concentrically with the bolt in the rotating drum, and when the bolt is loosened, the cylinder rod is extended using hydraulic pressure to release the pressing force and move the fixed block to the outside of the groove. And a cylinder to be provided.

  According to the drum shear according to the first aspect of the present invention, a pair of rotating drums that are rotatably provided so as to face each other with a transported belt plate interposed therebetween, and an outer peripheral surface of the rotating drum that extends in the axial direction of the rotating drum. A groove to be provided, a knife that is detachably disposed in the groove, a wedge-shaped fixing block that fixes the knife to the rotating drum, and one end connected to the fixing block and the other end to the rotating drum. A bolt that applies a pressing force to the knife via the fixed block by being connected, and a cylinder rod that is provided concentrically with the bolt in the rotating drum and that uses hydraulic pressure when the bolt is loosened By replacing the knife with a cylinder that releases the pressing force by extending the cylinder and moves the fixed block to the outside of the groove It can be carried out easily.

  Hereinafter, a drum shear according to the present invention will be described in detail with reference to the drawings. 1 is a front view of a drum shear according to one embodiment of the present invention, FIG. 2 is a plan view of the drum shear according to one embodiment of the present invention, FIG. 3 is a cross-sectional view taken along line AA in FIG. Is a plan view of the rotating drum, FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line C-C in FIG.

  First, the configuration of the drum shear 1 will be described with reference to FIG. As shown in FIG. 1 or 2, the drum shear 1 is provided with a pair of upper and lower rotary drums 2 that are installed so as to sandwich a strip S (see FIG. 3) such as a steel plate that is continuously conveyed from above and below. The rotating drum 2 is rotatably supported by a housing 4 installed on the base 3. In addition, each rotary drum 2 installed up and down has comprised the same structure. A shaft joint 6 is provided at one end of the rotary shaft 5 of the rotary drum 2, and a drive shaft 7 of a driving device (not shown) is connected to the shaft joint 6. Therefore, when the driving device is driven, the driving force is transmitted to the rotating drum 2 via the shaft joint 6, and thereby the pair of rotating drums 2 are simultaneously synchronously rotated at a rotation speed corresponding to the conveying speed of the band plate S. be able to.

  Next, the configuration of the rotary drum 2 will be described with reference to FIGS. As shown in FIGS. 3 to 6, a groove 8 is formed on the outer peripheral surface of the rotary drum 2 at a symmetrical position about the rotary shaft 5 and extending in parallel to the rotary shaft 5. 8 is formed over the entire area in the axial direction on the outer peripheral surface of the rotary drum 2. In the groove 8, a knife 9 formed with a length substantially the same as the length of the groove 8 and a divided wedge-shaped fixing block 10 are arranged. The knife 9 is in contact with the wedge surface of the fixed block 10 on its inclined surface, and is in contact with the liner 11 on its back surface.

  Concave mounting holes 12 are formed on both sides in the axial direction of the rotating drum 2 of the fixed block 10, and bolts 13 are attached to the mounting holes 12 so as to penetrate the rotating drum 2. The bolt 13 has one end engaged with the nut 14 in the mounting hole 12, and the other end engaged with the nut 15 in a concave working hole 16 formed on the outer peripheral surface of the rotating drum 2. A vertical hole 17 is formed in the groove 8 below the mounting hole 12 (inside in the radial direction of the rotary drum 2), and a holder 18 is provided in the vertical hole 17. The holder 18 is installed such that its lower surface closes the upper portion of the vertical hole 17.

  Further, a hydraulic cylinder 19 disposed concentrically with the bolt 13 is provided below the holder 18. That is, the hydraulic cylinder 19 is formed hollow, and the bolt 13 is passed through the hollow portion. The hydraulic cylinder 19 is provided with a cylinder rod 20 so as to surround the bolt 13, and between the base end of the cylinder rod 20 and the end of the hydraulic cylinder 19 around the cylinder rod 20. The disc spring 21 is interposed. The cylinder rod 20 is biased radially inward of the rotary drum 2 by a disc spring 21.

  An oil passage 22 extending in the axial direction is formed in the rotary drum 2, and the oil passage 22 communicates with the base end side of the cylinder rod 20 in the hydraulic cylinder 19 through a hydraulic supply / discharge passage 23. ing. The oil passage 22 communicates with a hydraulic source (not shown), and the hydraulic cylinder 19 can supply and discharge hydraulic pressure by the hydraulic source.

  Therefore, by making the above-described configuration, the band plate S is conveyed between the upper and lower rotary drums 2, and at the same time, the upper and lower rotary drums 2 are synchronously rotated at substantially the same speed as the conveyance speed of the band plate S, and By reversely rotating in the transport direction, the corresponding knives 9 of the upper and lower rotary drums 2 can approach each other and mesh with each other to shear the strip S in the width direction. At this time, since the hydraulic cylinder 19 is disconnected from the hydraulic pressure source, no hydraulic pressure is applied to the cylinder rod 20, and the cylinder rod 20 is disposed at the lower limit position by the biasing force of the disc spring 21. Since the bolt 13 is attached between the attachment hole 12 and the work hole 16 by the nuts 14 and 15, the pressing force from the bolt 13 is applied to the knife 9 via the fixed block 10. As a result, the knife 9 is firmly clamped (fixed), so that any shearing force or the like acting on the knife 9 will not fall out of the groove 8.

  When exchanging the knife 9, first, the shearing operation of the strip S is stopped, and then the rotary drum 2 is retracted to a predetermined offline position. Next, the bolts 13 are sequentially loosened with a wrench or the like, the nut 15 is removed, and after confirming that the clamping force of the bolts 13 is lost, the hydraulic pressure is supplied from the hydraulic source via the oil passage 22 and the hydraulic supply / discharge passage 23. Supply into the cylinder 19. As a result, the cylinder rod 20 is moved to the outside in the radial direction of the rotary drum 2 and abuts against the lower surface of the fixed block 10 against the biasing force of the disc spring 21 to push up the fixed block 10. Further, when the cylinder rod 20 is moved to the upper limit position, the fixed block 10 contacts the nut 14 and pushes up the bolt 13 (unclamp). When the gap between the inclined surface of the knife 9 and the wedge surface of the fixed block 10 is generated, the knife 9 can be removed. When the knife 9 is removed, the knife 9 is lifted by a crane or pulled out in the axial direction of the rotary drum 2 by a knife changing device or the like.

  Next, when a new knife 9 is attached, the cylinder rod 20 is moved to the lower limit position by the biasing force of the disc spring 21 by releasing the hydraulic pressure in the hydraulic cylinder 19 via the hydraulic supply / discharge passage 23 and the oil passage 22. Is done. Then, after a new knife 9 is fitted into the groove 8 and fixed by the fixing block 10, the bolts 13 are sequentially inserted and engaged with the nut 15 (clamp). Thereby, a pressing force from the bolt 13 is applied to the knife 9 via the fixed block 10, and the knife 9 can be clamped to the rotary drum 2.

  Therefore, according to the drum shear according to the present invention, the strip S transported with the pair of rotating drums 2 is rotatably provided so as to face the upper and lower directions, and the axial direction of the rotating drum 2 on the outer peripheral surface of the rotating drum 2 is provided. The groove 9 is extended to the knife 8, and the knife 9 is fixed in the groove 8 by a fixed block 10 formed in a wedge shape. Then, the bolt 13 is attached so that the fixed block 10 and the rotary drum 2 are connected, and the pressing force from the bolt 13 is applied to the knife 9 via the fixed block 10. On the other hand, when the bolt 13 is loosened, by extending the cylinder rod 20 of the hydraulic cylinder 19 provided concentrically with the bolt 13, the pressing force from the bolt 13 is released, and the fixing block 10 is moved outward of the groove 8. Try to move it. Thereby, replacement | exchange of the knife 9 can be performed easily.

  Further, since both sides of the fixed block 10 are pressed by the cylinder rod 20 of the hydraulic cylinder 19 during unclamping, the fixed block 10 can be pushed up in parallel. As a result, it is possible to prevent galling between the fixed block 10, the rotating drum 2, the slope of the knife 9, and other adjacent fixed blocks 10. Furthermore, by disposing the cylinder 9 on the concentricity of the bolt 13, it is not necessary to form an extra hole, so that the processing cost can be reduced and the rigidity of the rotary drum 2 can be improved.

  The present invention can be applied to a rotating body provided with a blade.

It is a front view of the drum shear which concerns on one Example of this invention. It is a top view of the drum shear which concerns on one Example of this invention. It is AA arrow sectional drawing of FIG. It is a top view of a rotating drum. It is a BB arrow sectional view of Drawing 4. It is CC sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum shear 2 Rotating drum 3 Base 4 Housing 5 Rotating shaft 6 Shaft joint 7 Drive shaft 8 Groove 9 Knife 10 Fixing block 11 Liner 12 Mounting hole 13 Bolt 14, 15 Nut 16 Work hole 17 Vertical hole 18 Holder 19 Hydraulic cylinder 20 Cylinder rod 21 Belleville spring 22 Oil passage 23 Hydraulic supply / discharge passage

Claims (1)

A pair of rotating drums rotatably provided so as to be opposed to each other across the belt plate to be conveyed;
A groove extending in the axial direction of the rotating drum on the outer peripheral surface of the rotating drum;
A knife detachably disposed in the groove;
A wedge-shaped fixing block for fixing the knife to the rotating drum;
A bolt for applying a pressing force to the knife via the fixed block by one end being connected to the fixed block and the other end being connected to the rotating drum;
It is provided concentrically with the bolt in the rotating drum, and when the bolt is loosened, the cylinder rod is extended using hydraulic pressure to release the pressing force and move the fixed block to the outside of the groove. A drum shear characterized by comprising a cylinder to be operated.

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