JP4194899B2 - Rolling cut shear - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rolling cut shear that shears a plate material by rolling an upper blade with respect to a lower blade.
[0002]
[Prior art]
As a conventional rolling cut shear, there is a technique described in Patent Document 1 below. In the rolling cut shear described in Patent Document 1, the upper end of an arm is eccentrically supported on a rotating shaft that rotates synchronously, and an upper blade on a downward arc is connected to the lower end of each arm. The link 6 is connected to the blade.
[0003]
Therefore, when each rotating shaft rotates in synchronization, the upper blade moves up and down via each arm, and the upper blade rolls as specified by the link, and the upper blade rolls on the linear lower blade. Thus, the plate material can be sheared.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 59-082614 [0005]
[Problems to be solved by the invention]
In the above-described conventional rolling cut shear, the arm is operated by the rotation of the rotation shaft and the upper blade is pushed down to roll the plate material to shear, so the arm applies a pressing force to the upper blade. On the other hand, a shear reaction force acts. Therefore, conventionally, a metal sliding bearing is interposed between the lower pressing surface of the arm and the upper pressure receiving surface of the upper blade. However, during the shearing process, a very large stress acts on the slide bearing, so that the slide bearing is worn out and its life is shortened, and the frictional resistance at this position is increased, resulting in a large power loss. there were.
[0006]
The present invention solves such a problem, and an object of the present invention is to provide a rolling cut shear that stabilizes work by efficiently transmitting stress from an arm to an upper blade.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a rolling cut shear according to the first aspect of the present invention includes a housing in which a conveying path for a plate material is provided at an intermediate portion in the vertical direction, and a pair of eccentrics rotatably supported on the upper portion of the housing. A pair of arms whose base ends are rotatably connected to the eccentric shafts, an upper blade block that can swing through the arms by rotation of the eccentric shafts, In a rolling cut shear comprising an upper blade attached to the lower portion and a lower blade provided at the lower portion of the housing so as to face the upper blade,
While providing the pressing part at the tip of the arm, the upper blade block is provided with a pressure receiving part that is in rolling contact with the pressing part, and at least one rolling surface of the pressing part and the pressure receiving part is formed in an arc shape. A gear mechanism is provided that maintains a rolling contact state between the pressing portion and the pressure receiving portion by meshing of the gears .
[0009]
In the rolling cut shear according to a second aspect of the present invention, the upper blade block has one end portion in the horizontal direction connected to the side portion of the housing via a connection link, and an intermediate portion in the horizontal direction via the lifting link. It is characterized by being suspended and supported on the upper part of the housing.
[0010]
The rolling cut shear according to a third aspect of the present invention is characterized in that a lateral displacement absorbing mechanism for absorbing lateral displacement that occurs when the upper blade moves up and down is provided at a connection portion between the connection link and the housing.
[0011]
In the rolling cut shear according to a fourth aspect of the present invention, an escape mechanism is provided for separating the upper blade laterally with respect to the lower blade after the upper blade is lowered with respect to the lower blade and the plate material is sheared. It is characterized by that.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
1 is a partially cutaway side view of a rolling cut shear according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is a schematic configuration of an upper blade drive mechanism, and FIG. The general | schematic structure showing the action | operation of is shown.
[0014]
The rolling cut shear of the present embodiment shears the left and right end portions of the conveyed belt-like plate material into a predetermined plate width and has a symmetrical structure with respect to the center of the plate material. In the following description, only the structure on one side of the rolling cut shear will be described, but the other side has substantially the same configuration.
[0015]
In the rolling cut shear of the present embodiment, as shown in FIGS. 1 and 2, the housing 11 is configured by integrally connecting an upper support frame 12 and a lower base 13 by a plurality of pillars (not shown). A conveying path for the plate material S is provided on the side between the support frame 12 and the base 13. A plurality of parallel guide rails 15 are laid on the floor surface 14, and the housing 11 has a horizontal direction perpendicular to the conveying direction of the belt-like plate material S by the front and rear guides 16 on the guide rails 15, that is, It is supported so as to be movable along the width direction of the plate material S.
[0016]
A pair of upper and lower entry pinch rolls 17 is mounted on the front side of the housing 11 (right side in FIG. 1), and the upper pinch roll 17 can be retracted upward by an open / close cylinder 18. On the other hand, a pair of upper and lower outlet pinch rolls 19 are mounted on the rear side of the housing 11 (left side in FIG. 1), and the upper pinch roll 19 can be retracted upward by the opening / closing cylinder 20.
[0017]
The support frame 12 of the housing 11 is supported by a pair of rotary shafts 21, 22 that are horizontal along the plate width direction and are rotatably supported in the front-rear direction. The shaft ends of the rotary shafts 21, 22 are driven. The gears 23 and 24 are respectively solidified, and the driven gears 23 and 24 mesh with one synchronous gear 25 positioned therebetween. A driving motor 26 is mounted on the support frame 12, and a driving gear 28 is fixed to the driving shaft 27. The driving gear 28 is connected to the synchronous gear 25 via a plurality of intermediate gears (not shown). I'm engaged. Therefore, when the drive motor 26 is driven, the rotational force is transmitted from the drive gear 28 to the synchronous gear 25 via the intermediate gear, and the rotary shafts 21, 24 are engaged via the two driven gears 23, 24 meshing with the synchronous gear 25. 22 can be rotated synchronously in the same direction.
[0018]
Each of the rotary shafts 21 and 22 is formed with a pair of eccentric bodies (eccentric shafts) 29 and 30 having eccentric centers O _1A and O _2A that are eccentric from the rotational centers O ₁ and O ₂ by predetermined distances L ₁ and L _2. ing. The upper large diameter portions (base end portions) of the pair of arms 31 and 32 are connected to the eccentric bodies 29 and 30 of the rotary shafts 21 and 22 via bearing bushes 33 and 34 so as to be relatively rotatable. On the other hand, the upper blade block 35 has an upper blade 37 detachably mounted along the conveying direction of the plate material S via a cutting blade mounting member 36 at the lower portion. And the press parts 51 and 52 mentioned later are provided in the lower end part (tip part) of each arm 31 and 32, On the other hand, the pressure receiving parts 53 and 54 which roll-contact the press parts 51 and 52 on the upper part of the upper blade block 35 are provided. Gear mechanisms 55 and 56 that maintain the rolling contact state between the pressing portions 51 and 52 and the pressure receiving portions 53 and 54 by the meshing of the gears are provided.
[0019]
A lower blade 43 is detachably mounted on the base 13 of the housing 11 along the conveying direction of the plate material S via a cutting blade mounting member 42. The upper blade 37 is provided so as to face a position slightly shifted in the width direction of the plate material S with respect to the lower blade 43 whose bottom surface is arcuate and whose upper surface is linear. The edge part of the board | plate material S can be sheared because 37 descend | falls while rolling (swinging). In addition, 44 is a shooter which receives the scrap from which the edge part of the board | plate material S was cut off by the shearing process.
[0020]
The upper end of the lifting link 45 is supported on the upper portion of the support frame 12, and the lower end is connected to the intermediate portion in the horizontal direction of the upper blade block 35, that is, between the pressure receiving portions 53 and 54, The upper blade block 35 is urged and supported upward so as to be lifted to the housing 11 by a lifting link 45. Further, the upper blade block 35 is connected to the side portion of the support frame 12 through the connection link 46 at the entrance side end portion, so that the front-rear position thereof is regulated. A lateral displacement absorbing mechanism 47 that absorbs lateral displacement that occurs when the upper blade 37 (upper blade block 35) is raised and lowered is provided at the connection portion between the connection link 46 and the support frame 12.
[0021]
The lateral displacement absorbing mechanism 47 includes a seesaw link 48 whose middle part is rotatably supported on the side part of the support frame 12, and 2 attached to both sides of the seesaw link 48 and elastically supported by the support frame 12. The connecting link 46 is connected to the end portion of the seesaw link 48. The seesaw link 48 moves horizontally by the elastic force of each spring mechanism 49 with respect to the lateral displacement of the upper blade 37, so that this lateral displacement can be absorbed.
[0022]
Therefore, when the drive motor 26 is driven to rotate the rotary shafts 21 and 22 in the same direction, the arms 31 and 32 are moved up and down in synchronization with the eccentric amount and the eccentric angle of the eccentric bodies 29 and 30, This lifting operation is transmitted to the upper blade block 35 via the pressing portions 51 and 52 and the pressure receiving portions 53 and 54. The upper blade block 35 performs a rolling operation while being regulated by the lifting link 45 and the connecting link 46, The plate material S can be sheared by the blade 37 rolling on the linear lower blade 43.
[0023]
When the plate material S is sheared by the operation of the upper blade 37, the arms 31 and 32 apply a predetermined pressing force to the upper blade block 35 when the arms 31 and 32 are lowered, while the upper blade 37 passes the upper blade block 35. Shear reaction force acts. For this reason, a structure is required between the arms 31 and 32 and the upper blade block 35 for properly transmitting the pressing force and reliably receiving the shear reaction force.
[0024]
In the present embodiment, the lower end portions of the arms 31 and 32 are integrally provided with pressing portions 51 and 52 whose lower surfaces form an arc shape, while the pressure receiving portions 53 and 54 whose upper surfaces have an arc shape are integrally provided on the upper portion of the upper blade block 35. ing. As shown in detail in FIG. 3, the pressing portions 51 and 52 and the pressure receiving portions 53 and 54, and the rolling contact surfaces 51 a and 52 a of the pressing portions 51 and 52 and the rolling contact surfaces 53 a of the pressure receiving portions 53 and 54, Both 54a are formed in an arc shape, and are configured to make rolling contact without being separated from each other. In this case, at least any one of the rolling contact surfaces 51a, 52a of the pressing portions 51, 52 and the rolling contact surfaces 53a, 54a of the pressure receiving portions 53, 54 may be formed in an arc shape. As in this embodiment, the rolling contact surfaces 51a and 52a and the rolling contact surfaces 53a and 54a may have a convex arc shape and a linear shape, or a convex arc shape and a concave arc shape, in addition to the convex arc shapes.
[0025]
Further, upper gears 57 and 58 are integrally provided at the lower ends of the arms 31 and 32 on both sides of the pressing portions 51 and 52, and on the both sides of the pressure receiving portions 53 and 54 on the upper portion of the upper blade block 35. Lower gears 59 and 60 which are located and mesh with the upper gears 57 and 58 are integrally provided. By the gear mechanisms 55 and 56 constituted by the upper gears 57 and 58 and the lower gears 59 and 60, the pressing portions 51 and 52 and the pressure receiving portions 53 and 54 can maintain their rolling contact state without being shifted back and forth. it can.
[0026]
Therefore, when the arms 31 and 32 are moved up and down by the drive motor 26, the rolling contact surfaces 51a and 52a of the pressing portions 51 and 52 press the rolling contact surfaces 53a and 54a of the pressure receiving portions 53 and 54, respectively. The arm mechanisms 31 and 32 can transmit a predetermined pressing force to the upper blade block 35 and the upper blade 37 shears the plate material S. The upper blade block 35 can roll and the upper blade 37 can shear the plate material S appropriately.
[0027]
Further, after the upper blade 37 is moved down together with the upper blade block 35 with respect to the lower blade 43 to shear the plate material S, the upper blade 37 is separated laterally so as not to contact the lower blade 43 or the end surface of the cut plate material S. An escape mechanism is provided that lifts while moving.
[0028]
That is, as shown in FIGS. 1 and 2, four wedges 61 and 62 are arranged on the left and right sides of the upper blade block 35, and the support rod 63 is suspended from the upper part of the support frame 12. , 64. Drive rods 67 and 68 that can be rotated by drive motors 65 and 66 mounted on the support frame 12 are drivingly connected to the support rods 63 and 64 via speed reduction mechanisms 69 and 70.
[0029]
A box 71 is provided so as to surround the upper blade block 35 and the wedges 61 and 62, and is rotatably supported on the support frame 12 by a support shaft 72. On the other hand, a cam disk 73 is fixed to the shaft end of the rotating shaft 21, and this cam disk 73 is drivingly connected to the box 71 via a link mechanism 74.
[0030]
Therefore, when the drive motors 65 and 66 are driven, the wedges 61 and 62 can be lifted and lowered via the drive rods 67 and 68, the speed reduction mechanisms 69 and 70, and the support rods 63 and 64, whereby each wedge 61, 62 The vertical position can be adjusted. Then, when the rotary shafts 21 and 22 are rotated to lower the upper blade 37 via the arms 31 and 32 and the plate material S is sheared, the cam disk 73 that rotates in synchronization with the rotary shaft 21 causes the box to pass through the link mechanism 74. The body 71 moves horizontally, moves the upper blade 37 together with the upper blade block 35 in a direction away from the lower blade 43, and ascends as it is, so that the upper blade 37 contacts the lower blade 43 and the end face of the cut plate S. Can be prevented.
[0031]
Further, a rotating shaft 81 is rotatably supported on the support frame 12 adjacent to the exit side of the rotating shaft 22 and can be rotated in synchronization with the rotation of the rotating shafts 21 and 22 by a drive motor (not shown). in which, in the rotary shaft 81, the eccentric 82 from the rotation center O ₃ having a predetermined distance L ₃ decentered eccentric center O _3A is formed, the large-diameter portion on the arm 83 to the eccentric 82 relative rotation It is connected freely. On the other hand, an upper blade 86 is detachably mounted along the width direction of the plate material S via a cutting blade mounting member 85 at the lower portion of the upper blade block 84. The upper blade block 84 is connected to the lower small diameter portion of the arm 83 by a connecting shaft 87 so as to be relatively rotatable.
[0032]
The upper blade 86 cuts an end portion cut from the plate material S by the upper blade 37, that is, scraps into a predetermined length, and is attached to the base 13 of the housing 11 via a cutting blade mounting member 88. The blade 89 faces the upper blade 86 and is detachably mounted along the width direction of the plate material S. The upper blade 86 is also provided with a relief mechanism having a wedge 90 and the like, similar to the upper blade 37, but the description is omitted because it is the same as described above.
[0033]
Further, a pressing member 91 at the end of the plate material S is mounted on the support frame 12 so as to be movable up and down by an elevating cylinder 92 adjacent to the side of the upper blade 37, and the pressing member 91 is attached to the end of the plate material S. Can be appropriately cut off by the upper blade 37 in a state in which is pressed onto the base 13.
[0034]
Here, a shearing method of the plate material S by the rolling cut shear of the present embodiment configured as described above will be described.
[0035]
As shown in FIGS. 1 and 2, the belt-like plate material S is sandwiched between the entrance-side pinch rolls 17 and loaded into the housing 11, and the left and right end portions are cut and processed to a predetermined plate width, and then discharged. It is nipped by the side pinch roll 19 and carried out.
[0036]
That is, the front and back of the plate material S are supported by the pinch rolls 17 and 19, and the presser member 91 is lowered by the elevating cylinder 92 to press the end of the plate material S onto the base 13. In this state, the drive motor 26 is driven to rotate the rotating shafts 21 and 22 in the same direction, and the arms 31 and 32 are moved up and down in synchronization with the eccentric amount and the eccentric angle of the eccentric bodies 29 and 30. Let Then, the upper blade block 35 performs a rolling operation while being regulated by the lifting link 45 and the connecting link 46, and the upper blade 37 rolls with respect to the linear lower blade 43, so that the end portion in the width direction of the plate S Is sheared.
[0037]
At this time, as shown in FIG. 3 and FIG. 4, the rolling contact surfaces 51 a and 52 a of the pressing portions 51 and 52 in the arms 31 and 32 are received by the upper blade block 35 together with the shearing of the plate material S by the upper blade 37. Since the rolling contact surfaces 53a and 54a of the portions 53 and 54 are pressed and the gear mechanisms 55 and 56 roll while being prevented from being displaced, the arms 31 and 32 transmit a predetermined pressing force to the upper blade block 35. In addition, the reaction force when the upper blade 37 shears the plate material S can be received.
[0038]
Further, after the upper blade 37 descends and the plate material S is sheared, the box 71 moves horizontally via the link mechanism 74 by the cam disk 73 that rotates synchronously with the rotating shaft 21, and together with the upper blade block 35, the upper blade 37. Is moved away from the lower blade 43, the lowered upper blade 37 is lifted at a position away from the lower blade 43, and the upper blade 37, the lower blade 43, and the end face of the cut plate S are separated. Contact can be prevented. In addition, after the upper blade 37 rises, the box 71 is horizontally moved reversely by the cam disk 73, and the upper blade 37 is returned to the original position together with the upper blade block 35.
[0039]
By repeating this operation, both ends of the plate material S are cut and the plate material S having a predetermined width is carried out, but strip-shaped scrap is generated on both sides. Therefore, the rotary shaft 81 is freely rotatable by a drive motor (not shown), the arm 83 is swung through the eccentric body 82, and the upper blade 86 is moved up and down together with the upper blade block 84. Then, the upper blade 86 is lowered, and the strip-shaped scrap separated from the plate material S by the upper blade 37 is cut into a predetermined length and dropped from the shooter 44, thereby preventing the interference between the plate material S and the scrap. Can do.
[0040]
Thus, in the rolling cut shear of this embodiment, a pair of rotating shafts 21 and 22 are rotatably supported on the upper portion of the housing 11, and eccentric bodies 29 and 30 are formed on the rotating shafts 21 and 22, The upper ends of the pair of arms 31 and 32 are fitted to the eccentric bodies 29 and 30, and the upper blade block 35 is swingably supported by the housing 11 and the upper blade 37 is fixed to the lower portion. The lower blade 43 is fixed so as to face the upper blade 37, and arc-shaped pressing portions 51, 52 are provided on the arms 31, 32, while the arc-shaped pressure receiving portion that is in rolling contact with the pressing portions 51, 52 on the upper blade block 35. 53 and 54 are provided.
[0041]
Therefore, when the rotary shafts 21 and 22 are rotated and the arms 31 and 32 are moved up and down via the eccentric bodies 29 and 30, the upper blade block 35 is rolled and the upper blade 37 rolls with respect to the lower blade 43. The width direction end of the plate material S can be sheared. At this time, the rolling contact surfaces 51a and 52a of the pressing portions 51 and 52 in the arms 31 and 32 correspond to the pressure receiving portions 53 and 54 in the upper blade block 35, respectively. Since the rolling is performed while pressing the rolling contact surfaces 53a and 54a, the arms 31 and 32 can properly transmit a predetermined pressing force to the upper blade block 35, and the upper blade 37 shears the plate material S. The reaction force can be properly received, and the work can be stabilized by efficiently performing the shearing processing of the plate material S.
[0042]
Since the pressing portions 51 and 52 of the arms 31 and 32 roll on the pressure receiving portions 53 and 54 of the upper blade block 35, slip does not occur between them, and wear is prevented and the member has a long life. Can be made possible. Further, the pressing portions 51 and 52 and the pressure receiving portions 53 and 54 are disposed between the arms 31 and 32 and the upper blade block 35, so that the shearing force can be efficiently transmitted while the apparatus can be made compact. Can be done.
[0043]
Further, gear mechanisms 55 and 56 are provided between the arms 31 and 32 and the upper blade block 35 to maintain the rolling contact state between the pressing portions 51 and 52 and the pressure receiving portions 53 and 54 by meshing of the gears. Therefore, when the pressing portions 51 and 52 of the arms 31 and 32 press the pressure receiving portions 53 and 54 of the upper blade block 35, the upper gears 57 and 58 move while meshing with the lower gears 59 and 60. Therefore, the arms 31 and 32 can properly transmit a predetermined pressing force to the upper blade block 35.
[0044]
Further, the upper intermediate portion of the upper blade block 35 is supported by being suspended from the housing 11 by the lifting link 45, and the side portion is connected to the housing 11 by the connecting link 46 so that the upper blade 37 can be appropriately rolled. The plate material S can be appropriately sheared. Further, a lateral displacement absorbing mechanism 47 is provided at the connecting portion between the housing 11 and the connection link 46, so that the lateral displacement due to the swinging motion of the arms 31 and 32 can be reliably absorbed to improve the smoothness of the operation.
[0045]
Moreover, after the upper blade 37 descend | falls with respect to the lower blade 43, the board | plate material S is sheared, the escape mechanism which has the wedges 61 and 62 which raise this upper blade 37 apart laterally with respect to the lower blade 43, and raises it. The upper blade 37, the lower blade 43, and the end surface of the cut plate S can be prevented from being provided.
[0046]
Further, an upper blade 86 and a lower blade 89 for cutting a strip-shaped scrap separated from the plate material S are provided in the housing 11 on the downstream side in the conveying direction of the upper blade 37 and the lower blade 43 for cutting the end portion of the plate material S. By cutting this scrap into a predetermined length, interference between the plate material S and the scrap can be prevented.
[0047]
In the above-described embodiment, the pressing portions 51 and 52 are provided on the lower ends of the arms 31 and 32 and the upper gears 57 and 58 are provided on both sides thereof, while the pressure receiving portions 53 and 54 are provided on the upper portion of the upper blade block 35. Although the lower gears 59 and 60 are provided on both sides thereof, the present invention is not limited to this structure, and the positions of the pressing portions 51 and 52 and the pressure receiving portions 53 and 54 and the upper gears 57 and 58 and the lower gears 59 and 60 are not limited to this structure. The relationship may be reversed and another structure may be used.
[0048]
Further, the pressing portions 51 and 52 and the pressure receiving portions 53 and 54 are provided on the arms 31 and 32 and the upper blade block 35 for cutting the end portion of the plate material S, but the arm 83 and the upper blade block 84 for cutting scrap are provided. You may provide a press part and a pressure receiving part.
[0049]
【The invention's effect】
As described above in detail in the embodiment, according to the rolling cut shear of the invention of claim 1, a pair of eccentric shafts are rotatably supported on the upper portion of the housing, and the base end portion of the arm is used as each eccentric shaft. The upper blade block can be swung through this arm by rotating the eccentric shaft, and the upper blade is attached to the lower part, while the lower blade is provided at the lower part of the housing so as to face the upper blade. while providing the pressing portion, provided with a gear mechanism to maintain the pressing portion in the upper blade block Rutotomoni provided pressure receiving portion for rolling contact, by the rolling contact gear engagement between the pressing portion and the pressure receiving portion Therefore, when the upper blade block rolls and the plate material is sheared by the upper blade and the lower blade, the arm presses the pressure receiving portion of the upper blade block and rolls, so the arm is located on the upper blade block. It is possible to properly transmit the pressing force of the sheet, to properly receive the shear reaction force, and to stabilize the work by efficiently performing the shearing processing of the plate material. Sliding does not occur, and it is possible to prevent wear and extend the life of the member. In addition, since the gear mechanism that maintains the rolling contact state between the pressing portion and the pressure receiving portion by the meshing of the gear is provided, when the arm pressing portion presses the pressure receiving portion of the upper blade block, the gear mechanism causes the rolling contact state. Therefore, the arm can properly transmit a predetermined pressing force to the upper blade block.
[0051]
According to the rolling cut shear of the invention of claim 2 , the upper blade block has one end portion in the horizontal direction connected to the side portion of the housing via the connection link, and the intermediate portion in the horizontal direction via the lifting link. Thus, the upper blade can be appropriately rolled by being suspended and supported on the upper portion of the housing, and the plate material can be appropriately sheared.
[0052]
According to the rolling cut shear of the invention of claim 3 , since the lateral displacement absorbing mechanism for absorbing the lateral displacement generated when the upper blade is raised and lowered is provided at the connecting portion between the connection link and the housing, the lateral displacement due to the swinging motion of the arm is ensured. And the smoothness of operation can be improved.
[0053]
According to the rolling cut shear of the invention of claim 4, since the upper blade is lowered with respect to the lower blade and the plate material is sheared, the relief mechanism for separating the upper blade laterally with respect to the lower blade is provided. It is possible to prevent contact between the upper blade, the lower blade and the end face of the cut plate material, and to prevent damage to the upper blade and the lower blade.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of a rolling cut shear according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a schematic configuration diagram of an upper blade driving mechanism.
FIG. 4 is a schematic configuration diagram showing the operation of the upper blade drive mechanism.
[Explanation of symbols]
11 Housing S Strip-like plate materials 21, 22 Rotating shaft 26 Drive motors 29, 30 Eccentric body (eccentric shaft)
31, 32 Arm 35 Upper blade block 37 Upper blade 43 Lower blade 45 Lifting link 46 Connecting link 47 Side shift absorbing mechanism 51, 52 Pressing portion 53, 54 Pressure receiving portion 55, 56 Gear mechanism 61, 62 Wedge (relief mechanism)

Claims (4)

A housing in which a plate material conveyance passage is provided at an intermediate portion in the vertical direction, a pair of eccentric shafts rotatably supported on the upper portion of the housing, and a pair of base end portions rotatably connected to the eccentric shafts An upper blade block that can be swung through each arm by rotation of the eccentric shaft, an upper blade attached to a lower portion of the upper blade block, and a lower portion of the housing that faces the upper blade In a rolling cut shear with a lower blade provided
While providing the pressing part at the tip of the arm, the upper blade block is provided with a pressure receiving part that is in rolling contact with the pressing part, and at least one rolling surface of the pressing part and the pressure receiving part is formed in an arc shape. A rolling cut shear comprising a gear mechanism for maintaining a rolling contact state between the pressing portion and the pressure receiving portion by meshing of the gears . The rolling cut shear according to claim 1 , wherein the upper blade block has one end portion in the horizontal direction connected to the side portion of the housing via a connecting link, and an intermediate portion in the horizontal direction via a lifting link. A rolling cut shear characterized by being suspended and supported on an upper portion of the housing. The rolling cut shear according to claim 2 , wherein a lateral displacement absorbing mechanism that absorbs lateral displacement generated when the upper blade is raised and lowered is provided at a connection portion between the connection link and the housing. The rolling cut shear according to any one of claims 1 to 3 , wherein after the upper blade is lowered with respect to the lower blade and the plate material is sheared, the upper blade is laterally separated from the lower blade. A rolling cut shear characterized by a mechanism.

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