JP5838916B2 - Cutting device and method for removing upper blade holder in cutting device - Google Patents

Description

  The present invention provides a cutting device that cuts a workpiece (workpiece) inserted between an upper blade and a lower blade by cooperation of the upper blade and the lower blade, and an upper blade holder that holds the upper blade. It is related with the removal method.

  The cutting device (shear or shearing machine) is provided with an upper blade and a lower blade in the vertical direction, and one of these as a movable blade generates a shearing force by moving toward the other fixed blade and is inserted. Cut the workpiece. Since the cutting apparatus can cut a wide range of workpieces at a time with good reproducibility, it is often used in processing that requires rapidity in mass production.

  The upper and lower blades of the cutting device need to be periodically replaced because deterioration progresses due to friction and stress generated when the workpiece is cut. In addition, since the shape of the cut surface of the workpiece depends on the shapes of the upper blade and the lower blade, replacement is also necessary to match the shape of the desired cut surface. However, since these blades are generally heavy, replacement work is often time-consuming.

  A cutting apparatus that facilitates replacement of the upper blade and the lower blade is disclosed in Patent Document 1. This cutting device includes an exchange means for storing a plurality of upper blade and lower blade units for cutting a workpiece, and a cutting device main body for detachably holding the units. The exchanging means is arranged on the side of the cutting device main body, and is connected by a rail so that the unit can move between them.

JP 2009-208191 A

  In general, the cutting device is large and is permanently fixed to a floor or the like. For example, when installed on a processing line such as a steel plate, movement after installation is very difficult. Moreover, in order to respond to various specifications and sizes of the workpiece, the blade is often formed as long as possible. When an exchange means as shown in Patent Document 1 is provided, the size of the exchange means is almost the same as that of the cutting device because of the need to accommodate the blade. And since it is large sized, it needs to be permanently installed beside the cutting device. Therefore, it is necessary to install an exchange means and to secure a space where the work can be performed around the exchange means. Further, since the replacement means is required only when the blade is replaced, it is a factor that increases the equipment cost and the running cost.

  Further, the cutting device includes a blade holder that holds a blade (upper blade or lower blade) and a blade frame that holds the blade holder. The blade is fixed to the blade holder with a fixing component such as a bolt. The blade frame defines a fixed position of the blade holder when the blade functions as a fixed blade, and defines a moving region together with the blade holder when the blade functions as a movable blade.

  When the blade is taken out from the cutting device by replacing the blade or the like, the blade is released from the blade holder or the blade holder holding the blade is released from the blade frame. Thereafter, the released blade or blade holder is retracted from the cutting region (that is, the region where the workpiece is cut by the upper blade and the lower blade) and suspended by a crane or the like.

  However, the blade frame is formed thick along the workpiece insertion direction (conveying direction) in order to prevent the blade or the blade holder from being distorted by the stress at the time of cutting. On the other hand, since the cutting area is between the upper and lower blade frames, the area is very narrow. Therefore, when manually removing the component that fixes the blade or the blade holder from the blade frame or the like, the workability is poor and dangerous because the cutting area is narrow.

  In view of the above circumstances, an object of the present invention is to provide a cutting device that can safely and easily replace the upper blade and a method for removing the upper blade holder in the cutting device.

A first aspect of the present invention is a cutting device that cuts a workpiece inserted between an upper blade and a lower blade by cooperation of the upper blade and the lower blade, and holds the upper blade, has a blade holder above having a first side and a second side, said groove comprising a second abutment surface that abuts the first abutment surface and the second side in contact with the first side surface An upper blade frame, a first fixing device that detachably fixes the upper blade holder to the first contact surface of the upper blade frame, and an axis parallel to the longitudinal direction of the upper blade frame as a central axis A housing that rotatably supports the upper blade frame, and a rotation drive mechanism that rotates the upper blade frame. The first side surface includes a longitudinal direction of the upper blade holder and the first fixing device. Extending in a direction orthogonal to the fixing direction of the second side surface of the second side surface A dovetail groove is formed to open and to guide the moving direction of the upper blade holder in the extending direction by engagement with the first fixing device, and the drive mechanism causes the upper blade to face the lower blade. The gist is to rotate the upper blade frame so that the dovetail groove extends vertically with the dovetail groove opening on the second side face facing downward.

  The upper blade holder is fixed to the upper blade frame by the fixing device in a state where the dovetail formed on the side surface is engaged with the fixing device. Due to the engagement between the dovetail groove and the fixing device, the moving direction of the upper blade holder is guided in a direction orthogonal to the fixing direction of the fixing device. In the present invention, the upper blade frame is rotated so that the moving direction is vertical, and the upper blade holder is not fixed to the upper blade frame. Therefore, it is possible to remove the upper blade holder while sliding it with respect to the upper blade frame in a place with good workability away from the lower blade. Further, the upper blade holder can be engaged with the fixing device in a state in which the moving direction is directed vertically, and the upper blade holder can be fixed to the upper blade frame with this fixing device.

  The first fixing device may include a drive unit that can expand and contract in a direction in which the upper blade frame is fixed to the first contact surface, and that fits into the dovetail from the extending direction of the dovetail. preferable.

  The cutting device may further include a second fixing device that detachably fixes the upper blade holder to the second contact surface of the upper blade frame.

  The second fixing device has a drive unit that can be expanded and contracted in the fixing direction of the upper blade frame and is rotatable around the second blade, and the second side surface has a drive unit that drives the second fixing device. It is preferable that an engaging portion that engages with the portion is formed.

  It is preferable that the drive part of the second fixing device has a rod-shaped neck part and a head part that is fixed to the tip of the neck part and engages with the engaging part.

According to a second aspect of the present invention, the workpiece inserted between the upper blade and the lower blade is cut by the cooperation of the upper blade and the lower blade, and the upper blade holder that holds the upper blade; A method for removing an upper blade holder in a cutting apparatus, comprising: an upper blade frame that contacts the blade holder; and a fixing device that detachably fixes the upper blade holder to the upper blade frame. That is, in this method, by engaging the upper blade holder and the fixing device, the upper blade holder is moved in the extending direction of the dovetail that guides the moving direction of the upper blade holder in the extending direction. Guide and separate the upper blade from the position facing the lower blade, and center the axis parallel to the longitudinal direction of the upper blade holder so that the direction in which the upper blade holder is guided is vertical The frame is rotated together with the upper blade and the upper blade holder, and the upper blade holder is fixed by the fixing device so as to be movable in the direction in which the upper blade holder is guided. And

  ADVANTAGE OF THE INVENTION This invention can provide the cutting | disconnection apparatus which can replace | exchange the holder holding an upper blade safely and easily, and the removal method of the upper blade holder in a cutting device.

It is a top view of the cutting device concerning one embodiment of the present invention. It is a front view of the cutting device concerning one embodiment of the present invention. It is a side view which shows the positional relationship of the upper blade holder and lower blade holder of the cutting device shown in FIG. It is a front view of the lower blade frame shown in FIG. It is the disassembled perspective view of the lower blade flame | frame, the lower blade holder, and the lower blade seen from diagonally back. It is an expansion perspective view of the dovetail formed in a lower blade holder. It is a side view of a linear cylinder. FIG. 3 is a rear view of the upper blade frame shown in FIG. 2. It is the disassembled perspective view of the upper blade flame | frame, the upper blade holder, and the upper blade seen from diagonally back. It is 10-10 sectional drawing in FIG. It is an expansion perspective view of the dovetail groove formed in an upper blade holder. It is explanatory drawing which shows rotation operation | movement of an upper blade frame, (a) shows the state in which the upper blade frame is in the “cutting execution position”, (c) shows the state in which the upper blade claim is in the “upper blade maintenance position”, (B) shows an intermediate state between (a) and (c). It is explanatory drawing which shows a mode that the drive part of a swing cylinder is inserted in an example of the engaging part formed in an upper blade holder, and the said engaging part. It is the top view and side view for demonstrating operation | movement of a swing cylinder, (a) is a contracted state of a drive part, (b) shows the expansion | extension state of the drive part seen from the same direction as (a). FIG. 15 is a cross-sectional view taken along line 15-15 of FIG. 8 when the engaging portion is formed. It is the schematic which shows the positional relationship of the upper blade holder and its periphery at the time of removing an upper blade holder from an upper blade frame in steps.

  An embodiment of the present invention will be described with reference to the drawings. FIG.1 and FIG.2 is the top view and front view of the cutting device which concern on this embodiment, respectively. FIG. 3 is a side view showing the positional relationship between the upper blade holder and the lower blade holder of the cutting apparatus shown in FIG.

  Hereinafter, for convenience of explanation, directions are defined as follows. In the cutting device 20 shown in FIG. 2, the front side of the paper surface (that is, the right side of the cutting device 20 in FIGS. 1 and 3) is “front”, and the back direction from the paper surface (that is, the cutting device 20 in FIGS. 1 and 3). Is defined as “after”. In the cutting device 20 shown in FIG. 2, the left side is defined as “left”, the right side is defined as “right”, the vertical direction toward the floor surface F is defined as “down”, and the opposite direction is defined as “up”.

  As shown in FIG. 1, the cutting device 20 of this embodiment is installed in the conveyance line DL which conveys workpiece | work W, such as a steel plate. The workpiece W is transported from the right side to the left side in FIG. A power unit 22 is installed to drive the lower blade 64 (lower blade frame 60) on the right side of the cutting device 20 when viewed from the upstream side of the transport line DL. The power unit 22 includes a motor 24 and a speed reducer 26 connected to the motor 24, and the power (rotational force) from the motor 24 is increased in torque by the speed reducer 26 and then the cutting device 20. It is transmitted to the crankshaft 28 inside.

  As shown in FIG. 2, the cutting device 20 includes a housing 30, an upper blade frame 40 that holds an upper blade 44 via an upper blade holder 42, and a lower blade that holds a lower blade 64 via a lower blade holder 62. A frame 60, the power unit 22 described above, and a rotation drive mechanism 80 that rotates the upper blade frame 40 are provided. In the present embodiment, the upper blade 44 is a fixed blade, and the lower blade 64 is a movable blade. That is, when the workpiece W is cut, the position of the upper blade 44 is fixed, and the position of the lower blade 64 is moved up and down by the power unit 22. That is, the cutting device 20 of the present embodiment cuts the workpiece W by the cooperation of the fixed upper blade 44 and the lower blade 64 that moves up and down.

  The housing 30 includes support columns 32, 32, a beam 34, and a beam 35. The support columns 32 and 32 are erected on the left and right floor surfaces F with the position of the transport line DL as the center. The beam 34 connects the upper portions of the columns 32 and 32. On the other hand, the beam 35 connects the lower portions of the columns 32 and 32.

  A mounting hole 36 is formed in the upper part of each column 32, and a bearing 37 is mounted in the mounting hole 36. A support portion 48 of the upper blade frame 40, which will be described later, is inserted into this bearing.

  On the other hand, guide rails 33 are attached to surfaces facing each other at the lower part of each support column 32. The guide rail 33 supports a lower blade frame 60 described later so as to be slidable in the vertical direction. Further, a mounting hole 38 is formed in a portion below each of the support columns 32 and 32 where the guide rail 33 is installed, and a bearing 39 is mounted in the mounting hole 38. A crankshaft 28 that bears the vertical movement of the lower blade frame 60 is inserted into the bearing. The crankshaft 28 and the lower blade frame 60 are connected by a connecting member 29.

  In front of the housing 30, a table 90 for placing the work W transferred from the transfer line is provided. The table 90 is fixed to the support columns 32 through a plate member 96 extending in the left-right direction. Further, the upper surface 91 of the table 90 is formed slightly below the placement surface 90a of the workpiece W, and the placement surface 90a is a cut surface by the upper blade 44 and the lower blade 64 from the placement surface of the upstream conveying line DL. It extends horizontally to the vicinity of the cutting area. That is, the position (height) of the upper surface 91 in the vertical direction is slightly below the position of the mounting surface of the transport line DL.

  As shown in FIGS. 2 and 3, for example, the table 90 of the present embodiment includes a plurality of rod-shaped members 94 arranged at predetermined intervals in the left-right direction. Each bar-shaped member 94 extends in the front-rear direction, has an upper surface 91 formed thereon, and is integrally formed with a plate material 96 that supports the bar-shaped member 94. In order to avoid interference with the lower blade frame 60, It has a T-shaped or inverted L-shaped cross section when viewed from the direction.

Next, the lower blade, the lower blade holder, the lower blade frame, and the like of this embodiment will be described.
4 is a front view of the lower blade frame 60, and FIG. 5 is an exploded perspective view of the lower blade frame 60, the lower blade holder 62, and the lower blade 64 as viewed obliquely from the rear. FIG. 6 is an enlarged perspective view of a dovetail groove 70 formed in the lower blade holder 62, and FIG. 7 is a side view of the linear cylinder 100. In addition, illustration of the lower part of the lower blade frame 60 is abbreviate | omitted in FIG.

  The lower blade frame 60 holds the lower blade 64 via the lower blade holder 62. Specifically, the lower blade holder 62 holds the lower blade 64, and the lower blade frame 60 holds the lower blade holder 62.

  As shown in FIG. 4, the lower blade frame 60 is formed in a cylindrical shape extending in the left-right direction and having a substantially rectangular cross section. The lower blade frame 60 holds the lower blade holder 62 and defines the position at which the workpiece W is cut, and receives stress on the lower blade 64 generated when the workpiece W is cut. Prevent deformation.

  As shown in FIG. 5, a protrusion 60 a that protrudes upward in the left-right direction is formed on the upper portion of the lower blade frame 60. A groove 66 for holding the lower blade holder 62 is formed in the protrusion 60a in the left-right direction. The groove 66 is formed in accordance with the shape of the lower blade holder 62, and the front and upper sides are opened so that the lower blade holder 62 can be mounted. That is, the inner surface of the groove 66 is formed in an approximately L shape when viewed from the left-right direction. Specifically, the front surface 66a of the groove 66 is orthogonal to the front-rear direction. Further, the linear cylinder 100 (see FIG. 7) is mounted on the protrusion 60a in which the groove portion 66 is formed, with the drive axis 106 parallel to the front-rear direction, and only the drive portion 104 is the front surface 66a of the groove portion 66. It projects from the telescopically.

  A joint portion 61 is provided on the bottom surface 60 b of the lower blade frame 60. The joint 61 connects the lower blade frame 60 and the connecting member 29 so as to be swingable. As shown in FIG. 2, the connecting member 29 is also connected to the crankshaft 28 so as to be swingable. Accordingly, the connecting member 29 moves up and down while swinging as the crankshaft 28 rotates, and the lower blade frame 60 also moves up and down while being supported by the guide rail 33.

  As shown in FIG. 5, the lower blade 64 is formed in a belt plate shape having a rectangular cross section that is short in the front-rear direction and long in the vertical direction. The lower blade 64 is fixed to the lower blade holder 62 so that its longitudinal direction is parallel to the left-right direction. That is, the longitudinal direction of the lower blade 64 is horizontally orthogonal to the insertion direction of the workpiece W. Further, the lower blade 64 is located behind the upper blade 44, which is a fixed blade, with a predetermined gap (see FIG. 3). Further, normally, in order to avoid interference with the workpiece W placed on the upper surface 91 (mounting surface 90a) of the table 90, the apparatus waits at a position below the upper surface 91. A mounting hole 64c through which a bolt or the like is inserted is formed from the front surface 64a to the back surface 64b of the lower blade 64 at a predetermined interval in the left-right direction.

  The lower blade holder 62 extends in the left-right direction and is formed in a prismatic shape having a substantially rectangular cross section. The lower blade holder 62 can be attached to and detached from the groove 66 of the lower blade frame 60 using a linear cylinder 100 described later attached to the lower blade frame 60. Retained. The lower blade holder 62 is also formed with a groove 68 for holding the lower blade 64. The groove portion 68 has an inner wall 68a with which the back surface 64b of the lower blade abuts and an inner wall 68b with which the bottom surface 64d of the lower blade abuts, and the front and upper sides are open. Moreover, the groove part 68 is formed according to the shape of the lower blade 64 so that the lower blade 64 can be fitted with almost no gap. The back surface 62a of the lower blade holder 62 is formed so as to be substantially orthogonal to the front-rear direction and extend in the left-right direction. Further, the bottom surface 62b of the lower blade holder 62 is formed horizontally so as to extend in the left-right direction. Therefore, the lower blade holder 62 is formed to have an L-shaped cross section when viewed from the left or right direction. In addition, a through hole 62c through which a fixing bolt or the like is inserted is formed in the inner wall 68a with which the back surface 64b of the lower blade 64 abuts in accordance with the position of the mounting hole 64c formed in the lower blade 64.

  When the lower blade holder 62 is attached to the lower blade frame 60, the back surface 62a and the bottom surface 62b of the lower blade holder 62 abut against the front surface 66a and the bottom surface 66b of the groove 66 formed in the lower blade frame 60, respectively.

  As shown in FIGS. 5 and 6, a plurality of dovetail grooves 70 extending in the vertical direction are formed on the back surface 62 a of the lower blade holder 62 at predetermined intervals in the horizontal direction. Each dovetail groove 70 is formed to have a substantially T-shaped cross section in the vertical direction. Also, one of the two end portions of each dovetail groove 70 is opened at the bottom surface 62b so that the drive unit 104 (see FIG. 7) of the linear cylinder 100 installed in the lower blade frame 60 can be inserted. Yes. Specifically, the dovetail groove 70 has a pair of flange portions 70a and 70a extending parallel to each other along the vertical direction with a predetermined gap G1 on the back surface 62a, and a pair of flange portions 70a and 70a. It has inner walls 70b and 70b which are located inside the lower blade holder 62 and extend parallel to each other along the vertical direction with a predetermined gap G2.

  As shown in FIG. 7, the linear cylinder 100 that engages with the dovetail groove 70 is, for example, a known hydraulic cylinder, and a drive unit 104 that expands and contracts along the drive axis 106 and a cylinder that slidably accommodates the drive unit 104. Part 108.

  The drive unit 104 includes a rod-shaped neck portion 110 that expands and contracts along the drive axis 106 and a head portion 112 that is fixed to the tip of the neck portion. The length (that is, the width, or the diameter when the neck is a round bar) D1 in the direction orthogonal to the drive axis 106 is the distance between the flanges 70a and 70a constituting the dovetail groove 70 of the lower blade holder 62. It is smaller than G1. The head 112 is a plate material such as a disk orthogonal to the drive axis 106, and its diameter (width) D <b> 2 is larger than the gap G <b> 1 between the flanges 70 a and 70 a of the dovetail 70, and Is smaller than the gap G2 between the inner walls 70b, 70b. Therefore, although the head 112 can move in the extending direction in the dovetail groove 70, the hooks 70a and 70a interfere with each other in the direction orthogonal to the extending direction so that they cannot come out.

  Therefore, when the lower blade holder 62 is fixed to the lower blade frame 60 using the linear cylinder 100, the dovetail formed on the bottom surface 62b of the lower blade holder 62 with the drive unit 104 of the linear cylinder 100 extended. The head 112 of the drive unit 104 is inserted from the opening of the groove 70. Further, the drive unit 104 is contracted with the head 112 placed in the dovetail groove 70. As a result, the head 112 engages with the dovetail groove 70 and presses the flanges 70 a and 70 a of the dovetail groove 70 against the lower blade frame 60. Accordingly, the lower blade holder 62 is stably held with respect to the lower blade frame 60. On the contrary, when the drive unit 104 extends in the dovetail groove, the engagement with the dovetail groove 70 is released. However, the drive unit 104 has a structure that cannot be directly removed from the back surface 62 a of the lower blade holder 62. Therefore, in a state where the engagement with the dovetail groove 70 is released, the movable direction of the lower blade holder 62 is limited only to the up and down direction.

  The linear cylinder 100 is also used as the linear cylinder 102 when the upper blade holder 42 is fixed to the upper blade frame 40. A dovetail groove 52 is formed in the upper blade holder 42, and a head 112 is engaged with the dovetail groove. The procedure for fixing the upper blade holder 42 to the upper blade frame 40 using the linear cylinder 102 is the same as described above.

Next, the upper blade 44, the upper blade holder 42, and the upper blade frame 40 of this embodiment will be described. FIG. 8 is a rear view of the upper blade frame 40. FIG. 9 is an exploded perspective view of the upper blade frame 40, the upper blade holder 42, and the upper blade 44 as viewed obliquely from the rear. 10 is a cross-sectional view taken along line 10-10 in FIG. FIG. 11 is an enlarged perspective view of a dovetail groove 52 formed in the upper blade holder 42.

  As shown in FIG. 8, the upper blade 44 is formed in a strip shape having a rectangular cross section that is short in the front-rear direction and long in the vertical direction. The upper blade 44 is fixed to the upper blade holder 42 so that the longitudinal direction thereof is substantially parallel to the left-right direction and the back surface 44a is vertical. In other words, the longitudinal direction of the upper blade 44 is orthogonal to the insertion direction of the workpiece W horizontally. Moreover, the upper blade 44 is located ahead of the lower blade 64 which is a movable blade. A through hole 44c through which a bolt or the like is inserted is formed from the back surface 44a of the upper blade 44 toward the front surface 44b at a predetermined interval in the left-right direction. Further, the upper blade 44 is inclined by a predetermined rake angle (for example, about 2 °) with respect to the horizontal plane along the left-right direction in order to facilitate cutting.

  As shown in FIG. 8, the upper blade holder 42 is formed in a prismatic shape having a substantially rectangular cross section that extends in the left-right direction. The upper blade holder 42 has a flat upper surface (first side surface) 42a and a front surface (second side surface) 42b. Further, the upper blade holder 42 is formed with a groove 43 for holding the upper blade 44. The groove 43 is formed at a position facing the lower blade 64 in a state where the upper blade holder 42 is attached to the upper blade frame 40. As shown in FIG. 9, the groove portion 43 extends in the left-right direction in accordance with the shape of the upper blade 44 so that the upper blade 44 fits with almost no gap, and has an L-shaped inner wall when viewed from the left-right direction. Formed as follows. That is, the groove 43 has an inner wall 43a that contacts the front surface 44b of the upper blade 44, and an inner wall 43b that contacts the upper surface 44d of the upper blade 44, and the rear and lower sides are opened in order to mount the upper blade 44. Yes. A through hole (screw hole) 43c through which a fixing bolt or the like is inserted (or screwed) is formed in the inner wall 43a in accordance with the position of the through hole 44c formed in the upper blade 44.

  As shown in FIG. 9, the upper blade holder 42 is attached to the groove portion 50 of the upper blade frame 40. At this time, the upper surface 42a and the front surface 42b of the upper blade holder 42 are in contact with the contact surface 50a and the contact surface 50b of the groove 50, respectively. On the other hand, the upper blade frame 40 is equipped with a plurality of linear cylinders 102 as first fixing devices. The linear cylinder 102 fixes the upper blade holder 42 attached to the groove 50 to the upper blade frame 40. The linear cylinder 102 can be the same as the linear cylinder 100 for fixing the lower blade holder 62 shown in FIG. The linear cylinder 102 is installed on the upper blade frame 40 with the drive unit 104 facing the upper blade holder 42 side.

  Specifically, dovetail grooves 52 that engage with the drive unit 104 of the linear cylinder 102 are formed on the upper surface 42a of the upper blade holder 42 at predetermined intervals along the left-right direction. The dovetail groove 52 extends in a direction perpendicular to the longitudinal direction (left-right direction) of the upper blade holder 42 and the fixing direction of the linear cylinder 102, that is, the direction in which the drive unit 104 contracts. That is, in the example shown in FIG. 10, the fixing direction of the linear cylinder 102 is the vertical direction, so the dovetail groove 52 extends in the front-rear direction (the horizontal direction in FIG. 10).

  As shown in FIG. 11, the dovetail groove 52 has a pair of flange portions 52a, 52a extending in parallel with each other along the front-rear direction, with a predetermined gap G3 on the upper surface 42a, and the pair of flange portions 52a, It has inner walls 52b and 52b which are located inside the upper blade holder 42 rather than 52a and extend parallel to each other along the front-rear direction with a predetermined gap G4. The gap G3 is larger than the length D1 of the neck 110 of the linear cylinder 102 and smaller than the diameter D2 of the neck 110 of the linear cylinder 102. Further, the gap G4 is larger than the diameter D2 of the neck 110.

  The dovetail groove 52 extends in the front-rear direction and opens at the front surface 42b so that the head 112 of the linear cylinder 102 can be inserted. That is, the upper blade holder 42 is guided along the extending direction of the dovetail groove 52 by the engagement of the dovetail groove 52 and the linear cylinder 102.

  In order to fix the upper blade holder 42 to the contact surface 50b of the upper blade frame 40, first, the dovetail groove 52 formed on the front surface 42b of the upper blade holder is extended with the drive unit 104 of the linear cylinder 102 extended. The head 112 of the drive unit 104 is inserted from the opening. Thereafter, the drive unit 104 is contracted to press the head portion 112 of the drive unit 104 against the flanges 52 a and 52 a of the dovetail groove 52. As a result, the upper surface 42a of the upper blade holder 42 comes into close contact with the contact surface 50b of the upper blade frame 40, and the upper blade holder 42 is held in the groove 50 of the upper blade frame 40 as shown in FIG. .

  In addition, the extending direction of the dovetail 52 and the fixing direction of the linear cylinder 102 are not limited to the front-rear direction and the up-down direction, respectively. That is, the extending direction of the dovetail groove 52 and the fixing direction of the linear cylinder 102 may be directions other than those shown in FIG. 9 as long as they are orthogonal to each other on a plane orthogonal to the left-right direction.

The upper blade frame 40 will be described in detail.
As described above, the upper blade frame 40 holds the upper blade 44 via the upper blade holder 42. Specifically, the upper blade holder 42 holds the upper blade 44, and the upper blade frame 40 holds the upper blade holder 42.

  As shown in FIG. 8, the upper blade frame 40 is formed in a cylindrical shape extending in the left-right direction. A protrusion 40a having a groove 50 for holding the upper blade holder 42 is formed at the lower portion of the upper blade frame 40 so as to protrude downward in the left-right direction. The upper blade frame 40 holds the upper blade holder 42 and defines the position at which the workpiece W is cut. The upper blade frame 40 receives the reaction force applied to the upper blade 44 that occurs during cutting, and the upper blade frame 44 and the upper blade holder 42 are deformed. To prevent.

  A cylindrical support portion 48 extending in the left-right direction is provided on the left side surface 40L and the right side surface 40R of the upper blade frame 40. The support portion 48 is attached to the attachment hole 36 of each support column 32 via a bearing 37. Thereby, the upper blade frame 40 is rotatably supported by the support columns 32 and 32 with the rotational symmetry axis of the support portion 48 as the rotation center axis 48a.

  FIG. 12 is an explanatory view showing the rotation operation of the upper blade frame. The upper blade frame 40 is used to perform a “cutting execution position” (see FIG. 12A) in which the upper blade 44 is opposed to the lower blade 64 in order to perform cutting, or a work for removing and attaching the upper blade 44. The upper blade 44 is rotated between the “upper blade maintenance position” (see FIG. 12C) at a position away from the position facing the lower blade 64. When the upper blade frame 40 is placed at the “upper blade maintenance position”, the upper blade holder 42 can be removed vertically (directly) upward.

  In the present embodiment, when the position of the upper blade frame 40 is changed from the “cutting execution position” to the “upper blade maintenance position”, the upper blade frame 40 is rotated by 90 ° so as to move the upper blade 44 backward and upward. Let In other words, when the housing is viewed from the left side as shown in FIG. 3, the upper blade frame 40 is rotated 90 ° clockwise.

  The rotation driving mechanism 80 performs the above rotation. That is, the rotation drive mechanism 80 rotates the upper blade frame 40 around the rotation center axis 48a, and fixes its position (posture) at either the “cutting execution position” or the “upper blade maintenance position”.

  As shown in FIG. 12A, the rotation drive mechanism 80 includes a linear cylinder 82, a fulcrum portion 83, and a joint portion 85, and connects the upper left and upper right sides of the housing 30 and the upper blade frame 40. ing. The linear cylinder 82 is, for example, a known hydraulic cylinder. The linear cylinder 82 has a drive portion 84 that expands and contracts along the drive axis 87 and a cylindrical portion 88 that slidably accommodates the drive portion 84. The stroke length L of the drive portion 84 is at least √2 times the distance R from the support point 85a of the joint portion 85 to the rotation center axis 48a of the upper blade frame 40.

  The fulcrum part 83 is fixed to the upper left side and the upper right side of the housing 30 and in the front-rear direction at a portion ahead of the rotation center axis of the upper blade frame 40. The fulcrum portion 83 is arranged so that the linear cylinder 82 (cylindrical portion 88) swings on a plane orthogonal to the left-right direction, and the driving portion 84 extends and contracts below the cylindrical portion 88. The cylindrical portion 88 is supported.

  The joint portion 85 is fixed to the upper left side and the upper right side of the upper blade frame 40 and to a portion in front of the rotation center of the upper blade frame 40 in the front-rear direction. The joint unit 85 supports the tip of the drive unit 84 so that the linear cylinder 82 (drive unit 84) swings on the same plane as the plane on which the linear cylinder 82 swings. When the upper blade frame 40 is in the “cutting execution position” shown in FIG. 12A, the support point 85a is an angle from the rotation center axis 48a to the front (rightward in FIGS. 12A to 12C). Is 0 °, and is positioned at an angle of 45 ° upward from the rotation center axis 48a. In other words, the support point 85a is located on a line rotated 45 ° counterclockwise around the rotation center axis 48a with reference to the horizontal plane including the rotation center axis 48a in FIGS. 12 (a) to 12 (c).

  In order to rotate the upper blade frame 40 from the “cutting execution position” shown in FIG. 12A to the “upper blade maintenance position” shown in FIG. 12C, the drive portion 84 of the linear cylinder 82 is extended by the stroke length L. Let That is, when the drive portion 84 extends with the support point 85a of the joint portion 85 placed at the position shown in FIG. 12A, the cylindrical portion 88 is fixed to the housing 30 by the fulcrum portion 83. 85 is pressed downward. As a result, a torque that rotates clockwise in FIGS. 12A to 12C is generated in the upper blade frame 40, and the upper blade frame 40 rotates clockwise as shown in FIG. 12B. By this rotation, the linear cylinder 82 rotates counterclockwise around the support point 83a of the fulcrum portion 83. Thereafter, when the drive unit 84 extends to the stroke length L, the rotation of the linear cylinder 82 is reversed clockwise, and finally the upper blade frame 40 is rotated by 90 ° as shown in FIG. The upper blade maintenance position is reached. At this time, the support point 85a is positioned at an angle of 45 ° downward.

  When the upper blade frame 40 is rotated by 90 ° from the “cutting execution position” to the “upper blade maintenance position”, the dovetail groove 52 of the upper blade holder 42 is extended in the vertical direction with the opening facing downward by this rotation. Become. Accordingly, when the fixing of the linear cylinder 102 is released at the “upper blade maintenance position”, the upper blade holder 42 is movable only in the vertical direction. Further, in the “upper blade maintenance position”, the upper blade 44 is sufficiently separated from the lower blade 64. That is, the upper blade 44 has moved to an environment where replacement work or the like is easy. Accordingly, the upper blade holder 42 can be easily and safely lifted by a crane or the like.

  In order to strengthen the holding of the upper blade frame 40 with respect to the upper blade holder 42, an engaging portion 47 shown in FIG. 13 is formed on the front surface 42b of the upper blade holder 42, and the swing cylinder 120 shown in FIG. It may be installed on the frame and engaged with the engaging portion 47.

  As shown in FIG. 13, the engaging portion 47 is formed in a dovetail shape that extends in the vertical direction and has a substantially T-shaped cross section, for example. That is, the engaging portion 47 includes a pair of flange portions 47a and 47a extending in parallel with each other in the vertical direction with a predetermined gap G5 on the front surface 42b, and an upper blade than the pair of flange portions 47a and 47a. It has an inner wall 47b, 47b which is located inside the holder 42 and extends parallel to each other along the vertical direction with a predetermined gap G6. Further, the gap G5 between the flanges 47a and 47a is narrower than the gap G6 between the inner walls 47b and 47b so as to be formed as dovetails. In addition, in order to form this engagement part 47 in a dovetail shape, one of the two end parts in the extending direction is opened at the bottom surface 42 d of the upper blade holder 42.

  On the other hand, the upper blade frame 40 is provided with a swing cylinder 120 as a second fixing device that detachably fixes the upper blade holder 42 to the upper blade frame 40. As shown in FIG. 14, the swing cylinder 120 expands and contracts along the drive axis 126, and in the extended state, the drive unit 124 that rotates 90 ° around the drive axis 126 and the drive unit 124 are slidably accommodated. And a cylindrical portion 125. That is, as shown in FIGS. 14A and 14B, the drive unit 124 in the contracted state (shown by a solid line in FIG. 14A) extends along the drive axis 126 (FIG. 14A). ) (Indicated by the dotted line in FIG. 14), it rotates 90 ° around the drive axis 126 (see the upper diagram in FIG. 14B). The swing cylinder 120 also performs the reverse operation. That is, the direction in which the drive unit 124 contracts is the direction in which the upper blade holder 42 is fixed by the swing cylinder 120.

  The drive unit 124 includes a rod-shaped neck 127 that expands and contracts along the drive axis 126 and a head 128 that is fixed to the tip of the neck. The length (that is, the width or diameter when the neck portion is a round bar) D3 in the direction orthogonal to the drive axis 126 is smaller than the gap G5 between the flange portions 47a and 47a of the engaging portion 47. The head 128 is a flat plate orthogonal to the drive axis 126, and is formed in a substantially elliptical shape having a long side (long axis) 128a and a short side (short axis) 128b orthogonal to each other when viewed from the drive axis 126. ing. The head 128 has such a size as to engage with the engaging portion 47 according to the rotation state and the expansion / contraction state of the neck portion 127. That is, the length LS of the short side 128b of the head 128 is smaller than the gap G5 between the flanges 47a and 47a. The length LL of the long side 128a of the head 128 is larger than the interval G5 between the flanges 17a and 47a and smaller than the interval G6 between the inner walls 47b and 47b.

  Therefore, when the upper blade holder 42 is fixed to the upper blade frame 40 using the swing cylinder 120, the drive unit 124 is passed between the flanges 47a and 47a while maintaining the extended state shown in FIG. Thus, the head 128 is inserted into the engaging portion 47 in such a posture that the long side 128a of the head 128 is parallel to the extending direction of the flange portion 47a. Thereafter, the drive unit 124 is rotated by 90 ° around the drive axis 126 and contracted. As a result, a part of the extended head 128 extending in the extending direction of the long side 128a presses the flanges 47a, 47a against the upper blade frame 40, and as a result, as shown in FIG. Is fixed to the upper blade frame 40.

  FIG. 16 is a schematic diagram showing stepwise the positional relationship between the upper blade holder 42 and its periphery when the upper blade holder 42 is removed from the upper blade frame 40. In each figure of Drawing 16 (a)-(d), the right figure shows upper blade frame 40 seen from the left side, and the left figure shows upper blade frame 40 seen from back. Further, in these drawings, the upper blade holder 42 in the form in which the engaging portion 47 is formed and the upper blade frame 40 in the form in which the swing cylinder 120 is mounted are exemplified. In FIG. 16, for convenience of explanation, the linear cylinder 102 and the swing cylinder 120 are illustrated on the same plane.

  FIG. 16A shows a state where the upper blade frame 40 is rotated to the “upper blade maintenance position”. That is, due to the engagement between the dovetail groove 52 of the upper blade holder 42 and the linear cylinder 102, the moving direction of the upper blade holder 42 is a direction orthogonal to the fixing direction to the upper blade frame 40 by the linear cylinder 102 (that is, The dovetail groove 52 is limited in the extending direction). In other words, the upper blade holder 42 is guided so as to move only in the extending direction of the dovetail 52. In the state shown in FIG. 16A, both the linear cylinder 102 and the swing cylinder 120 fix the upper blade holder 42 to the upper blade frame 40. Further, by rotating the upper blade frame 40 by 90 °, the contact surface 50a of the upper blade frame 40 is substantially horizontal. Therefore, in this state, even if each fixation of the linear cylinder 102 and the swing cylinder 120 is released, the contact surface 50a supports the upper blade holder 42 from below, so that the upper blade holder 42 is removed from the groove portion 50 of the upper blade frame 40. It will not drop out.

  FIG. 16B shows a state in which each fixing of the linear cylinder 102 and the swing cylinder 120 is released in the state shown in FIG. That is, the drive unit 104 of the linear cylinder 102 moves backward in the dovetail groove 52 (that is, to the left in this figure) to release the pressing of the flanges 52a and 52a, as shown in the upper right enlarged view. . Furthermore, the drive unit 124 of the swing cylinder 120 is also extended, and rotated about 90 ° around the drive axis 126 (see FIG. 14) to release the engagement with the engagement unit 47. That is, in the state shown in FIG. 16B, the upper blade holder is guided upward. However, since the head 128 of the linear cylinder 102 is in the dovetail groove 52, the upper blade holder 42 is restricted from moving in directions other than upward.

  Next, the upper blade holder 42 is gradually lifted upward from the state shown in FIG. 16B using a lifting jig (not shown) or the like (see FIG. 16C). The head 128 of the linear cylinder 102 is removed from the opening of the dovetail groove 52 formed in the front surface 42b (see FIG. 16D). At this time, the engagement between the swing cylinder 120 and the engaging portion 47 has already been released, and the upper blade holder 42 can be freely moved.

  As described above, according to the present embodiment, the upper blade holder is fixed to the upper blade frame by the linear cylinder with the dovetail groove formed on the side surface engaged with the linear cylinder (fixing device). Due to the engagement between the dovetail groove and the linear cylinder, the moving direction of the upper blade holder is guided in a direction orthogonal to the fixing direction of the linear cylinder. In the present embodiment, the upper blade frame is rotated so that the moving direction is vertical, and the upper blade holder is fixed to the upper blade frame. Therefore, it is possible to remove the upper blade holder while sliding it with respect to the upper blade frame in a place with good workability away from the lower blade. Further, the upper blade holder can be engaged with the linear cylinder in a state where the moving direction is directed vertically, and the upper blade holder can be fixed to the upper blade frame with this linear cylinder. That is, the present invention can provide a cutting device capable of exchanging the holder for holding the upper blade safely and easily, and a method for removing the upper blade holder in the cutting device.

  In addition, although the linear drive cylinder 80 was used for the rotational drive mechanism 80 of this embodiment, the present invention is not limited to this, and any mechanism that can rotate the upper blade frame 40 can be applied. For example, the support portion 48 of the upper blade frame 40 may be directly rotated by a motor, a chain via the motor, or the like. Even in this case, the same effect as described above can be obtained.

  DL: Conveying line, W: Workpiece (workpiece), 20: Cutting device, 30: Housing, 40 ... Upper blade frame, 42 ... Upper blade holder, 44 ... Upper blade, 47 ... Engagement portion, 48a ... Center of rotation Shaft (upper blade frame), 50 ... groove (upper blade frame), 50a ... contact surface (upper blade frame), 50b ... contact surface (upper blade frame), 52 ... dovetail groove, 60 ... lower blade frame, 62 ... Lower blade holder, 64 ... Lower blade, 70 ... Dovetail groove (lower blade holder), 80 ... Rotation drive mechanism, 82 ... Linear cylinder, 83 ... Support point portion, 84 ... Drive portion, 85 ... Joint portion, 90 ... Table, 90a: Placement surface, 100 ... Linear cylinder, 102 ... Linear cylinder, 120 ... Swing cylinder

Claims (6)

A cutting device for cutting a workpiece inserted between an upper blade and a lower blade by cooperation of the upper blade and the lower blade,
An upper blade holder that holds the upper blade and has a first side surface and a second side surface;
An upper blade frame having a groove portion comprising a first contact surface that contacts the first side surface and a second contact surface that contacts the second side surface;
A first fixing device for removably fixing the upper blade holder to the first contact surface of the upper blade frame;
A housing that rotatably supports the upper blade frame with an axis parallel to the longitudinal direction of the upper blade frame as a central axis;
A rotation drive mechanism for rotating the upper blade frame,
The first side surface extends in a direction orthogonal to the longitudinal direction of the upper blade holder and the fixing direction of the first fixing device, and an end thereof opens at the second side surface, and A dovetail groove is formed by guiding the moving direction of the upper blade holder in the extending direction by engagement with the first fixing device,
The drive mechanism separates the upper blade from the position facing the lower blade, and the upper blade so that the extension direction of the dovetail is vertical with the opening of the dovetail on the second side facing downward A cutting device characterized by rotating a frame.   The first fixing device includes a drive unit that is extendable in a fixing direction of the upper blade frame to the first contact surface and that fits into the dovetail from the extending direction of the dovetail. The cutting device according to claim 1, wherein   The cutting apparatus according to claim 1, further comprising a second fixing device that detachably fixes the upper blade holder to the second contact surface of the upper blade frame. The second fixing device has a drive unit that is extendable and contractible in the fixing direction of the upper blade frame and that is rotatable around the second blade fixing device.
The cutting device according to claim 3, wherein an engagement portion that engages with a drive portion of the second fixing device is formed on the second side surface.   5. The cutting device according to claim 4, wherein the drive unit of the second fixing device includes a rod-shaped neck portion and a head portion that is fixed to a tip end of the neck portion and engages with the engaging portion. . An upper blade holder that holds the upper blade by cutting the workpiece inserted between the upper blade and the lower blade by the cooperation of the upper blade and the lower blade; and an upper blade frame that contacts the upper blade holder; A cutting device comprising: a fixing device that detachably fixes the upper blade holder to the upper blade frame;
By engaging the upper blade holder and the fixing device, the upper blade holder is guided to move in the extending direction of the dovetail that guides the moving direction of the upper blade holder in the extending direction ,
The frame is separated from the position where the upper blade is opposed to the lower blade and the axis parallel to the longitudinal direction of the upper blade holder is a central axis so that the direction in which the upper blade holder is guided is vertical. Rotate together with the upper blade and the upper blade holder,
A method for removing an upper blade holder from a cutting device, wherein the fixing device releases the upper blade holder so that the upper blade holder can move in the guided direction .

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