JP5817647B2 - Cutting device and lower blade holder removal method - Google Patents

Description

  The present invention relates to a cutting device including a lower blade holder exchanging device that holds a lower blade, and a lower blade holder 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 device can cut a wide area of a workpiece (working object) at a time with high reproducibility, it is frequently 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.

  Patent document 1 is disclosing the cutting device which made easy exchange of an upper blade and a lower blade. 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. Therefore, 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 a fixed part such as a bolt and is fixed to the blade holder. 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 lower blade and a method for removing the lower blade holder in the cutting device.

1st aspect of this invention is a cutting device which cut | disconnects the workpiece | work inserted between the said upper blade and the said lower blade because a lower blade moves toward an upper blade, Comprising: The said lower blade is fixed A lower blade holder, a lower blade frame that moves up and down toward the upper blade while holding the lower blade holder in a detachable manner, along a direction that is horizontal and orthogonal to the insertion direction of the workpiece, A pair of lower blade holder conveying devices installed so as to be able to enter and exit the moving region of the lower blade holder when cutting the workpiece, and each lower blade holder conveying device is separated from the lower blade frame in the moving region. A carriage on which one of both end portions of the removed lower blade holder is placed, and a movement mechanism for moving the carriage from the movement area of the lower blade holder in the insertion direction of the workpiece or in the opposite direction thereof. The gist is to have The
When removing the lower blade holder from the cutting device, the lower blade holder transport device places the lower blade holder released from the lower blade frame on the carriage within the movement region of the lower blade holder, and the carriage is inserted in the workpiece insertion direction. Or move in the opposite direction. That is, the lower blade holder removed from the lower blade frame is carried out to a place away from the cutting region where the upper blade and the lower blade face each other without departing from the conveying line. Therefore, the lower blade holder can be separated from the cutting region without occupying the space on the side of the conveyance line as compared with the method of carrying out the lower blade holder in the direction orthogonal to the conveyance line. That is, the work on the lower blade holder can be performed in a safe place with a good work environment. Similarly, when the lower blade holder is attached to the cutting device, the lower blade holder can be carried into the cutting area from a location away from the cutting area on the transport line. Furthermore, the attachment to the lower blade frame of the lower blade holder and the release from the lower blade frame are performed by the vertical movement of the lower blade frame. Therefore, it is not necessary for an operator to enter the periphery of the cutting area for these operations, and safety can be ensured.

  The pair of lower blade holder conveying devices may be connected by a power distribution member that distributes the power. In this case, the power distribution member can be removed from each of the moving mechanisms.

  A second aspect of the present invention is a method for removing a lower blade holder in a cutting device that cuts a workpiece inserted between the upper blade and the lower blade by moving the lower blade toward the upper blade. . In this method, the lower blade holder to which the lower blade is fixed is lifted to a position higher than the mounting surface of the carriage together with the lower blade frame holding the lower blade holder, and the lower blade holder A pair of carriages are moved to the lower side of each end of the lower blade holder from two directions that are horizontally orthogonal to the workpiece insertion direction, and the lower blade holder and the lower blade frame are lowered to the moving area. The both ends of the lower blade holder are placed on the pair of carriages, the lower blade holder is removed from the lower blade frame, and the pair of carriages are moved from the moving region of the lower blade holder to the workpiece. It is made to move to the said insertion direction or the reverse direction.

  In the above-described method, it is preferable that the pair of carts move by power distributed from one power.

  INDUSTRIAL APPLICABILITY The present invention can provide a cutting device capable of replacing the lower blade safely and easily and a method for removing the lower blade holder in the 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 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 “blade maintenance position”, ( b) shows an intermediate state between (a) and (c). It is a rear view of the lower blade holder conveying apparatus which concerns on one Embodiment of this invention. It is a top view of the lower blade holder conveying apparatus shown in FIG. It is a side view of the lower blade holder conveying apparatus shown in FIG. It is a side view for demonstrating the support to the support | pillar 32 of the slide frame 132. FIG. It is a side view which shows an example of the trolley | bogie of a lower blade holder conveying apparatus. It is 15-15 sectional drawing of the trolley | bogie shown in FIG. It is the schematic which shows the process of carrying out a lower blade holder from a cutting device using a lower blade holder conveyance apparatus 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-like member 94 extends in the front-rear direction and has an upper surface 91 formed integrally with a plate member 96 that points to the bar-like 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 64, the lower blade holder 62, the lower blade frame 60, etc. of this embodiment are demonstrated.
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 extends horizontally and is 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 placement surface 90a, 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. 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.

  As shown in FIG. 5, flanges 63, 63 are provided on the left and right side surfaces 62 d, 62 d of the lower blade holder 62. The eaves 63 and 63 are flat plates, for example, and are fixed so as to protrude horizontally from the left and right side surfaces 62d and 62d. When transporting the lower blade holder 62, a pair of carriages 140, 140 of the lower blade holder transport device 130 described later is installed below the flange portions 63, 63, and the flange portions 63, 63 are attached to each carriage 140. Placed.

  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 when the upper blade holder 42 is fixed to the upper blade frame 40. The upper blade holder 42 is formed with a dovetail groove (not shown), and the 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 100 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. 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 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 using bolts or the like so that the longitudinal direction thereof is substantially parallel to the left-right direction and the back surface 44a is substantially vertical. In other words, the longitudinal direction of the upper blade 44 is substantially perpendicular 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. Further, the upper blade 44 (blade surface 45) 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 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. The groove 43 is formed to extend in the left-right direction in accordance with the shape of the upper blade 44 so that the upper blade 44 fits almost without any gap, and has an L-shaped inner wall when viewed from the left-right direction. Further, in order to mount the upper blade 44, the rear and lower sides are opened. The upper blade holder 42 is detachably fixed to the groove portion 50 of the upper blade frame 40 using the linear cylinder 100 and the swing cylinder 102 installed above and in front of 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 (see FIG. 3) having a groove 50 for holding the upper blade holder 42 is formed on 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. 9 is an explanatory view showing the rotation operation of the upper blade frame 40. The upper blade frame 40 has a “cutting execution position” (see FIG. 9A) in which the upper blade 44 is opposed to the lower blade 64 in order to perform cutting. In order to perform the replacement work, the upper blade 44 is rotated between a “blade maintenance position” (see FIG. 9C) placed at a position away from a position facing the lower blade 64. When the upper blade frame 40 is placed at the “blade maintenance position”, the upper blade holder 42 can be removed vertically (straight) upward.

  In the present embodiment, when the position of the upper blade frame 40 is changed from the “cutting execution position” to the “blade maintenance position”, the upper blade frame 40 is rotated by 90 ° so as to move the upper blade 44 backward and upward. . 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 “blade maintenance position”.

  As shown in FIG. 9A, 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. 9A, the support point 85a is an angle from the rotation center axis 48a to the front (rightward in FIGS. 9A to 9C). 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.

  In order to rotate the upper blade frame 40 from the “cutting execution position” shown in FIG. 9A to the “blade maintenance position” shown in FIG. 9C, the drive portion 84 of the linear cylinder 82 is extended by the stroke length L. . 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. 9A, 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. 9A to 9C is generated in the upper blade frame 40, and the upper blade frame 40 rotates clockwise as shown in FIG. 9B. 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 blade maintenance position is reached. At this time, the support point 85a is positioned at an angle of 45 ° downward.

  Next, the lower blade holder conveying apparatus of this embodiment will be described. 10, 11, and 12 are a rear view, a plan view, and a side view of the lower blade holder transport device 130 according to the present embodiment, respectively. FIG. 13 is a side view for explaining the support of the slide frame 132 to the column 32. FIG. 14 is a side view showing an example of the carriage 140 of the lower blade holder conveying device 130. 15 is a cross-sectional view of the carriage 140 shown in FIG. 14 taken along line 15-15. FIG. 16 is a schematic diagram showing stepwise how the lower blade holder 62 is conveyed from the cutting device 20.

  As shown in FIG. 2 and FIG. 10, the lower blade holder conveying device 130 is installed substantially at the center of each column 32. Specifically, the lower blade holder conveying device 130 is supported by each support column 32 so as to be movable along a direction that is horizontal and orthogonal to the insertion direction of the workpiece W (that is, the left-right direction). If a region (space) in which the lower blade holder 62 moves up and down when the workpiece W is cut is defined as a moving region M, the lower blade holder conveying device 130 is installed so as to be able to enter and leave the moving region M. That is, when the lower blade holder 62 is replaced, the lower blade holder transport device 130 moves in the left-right direction so that the carriage 140 is positioned below the end portion (that is, the flange 63) of the lower blade holder 62.

  As shown in FIG. 10, each lower blade holder conveyance device 130 has a symmetrical structure when viewed from the rear. Accordingly, since all the lower blade holder conveying devices 130 are functionally the same, in the following description, the lower blade holder conveying device 130 on the left side in FIG. 10 will be described, and the lower blade holder conveying device on the right side in FIG. Description of 130 is omitted.

  As shown in FIG. 11, the lower blade holder conveying device 130 reciprocates the carriage 140 on which the flange 63 of the lower blade holder 62 is placed and the carriage 140 in the front-rear direction (left and right in FIG. 11). A moving mechanism 160 and a slide frame 132 that supports the moving mechanism 160 and is slidably supported by the support column 32 are provided.

First, the slide frame 132 will be described.
As shown in FIGS. 10 and 11, the slide frame 132 is a frame formed so as to surround the support column 32 horizontally. The slide frame 132 extends in the front-rear direction (left-right direction in FIG. 11) and the strip plate portions 132a and 132b that extend parallel and horizontally to the front side surface 32a and the rear side surface 32b of the support column 32, and each strip plate portion 132a. It is comprised from the connection part 132c which connects the edge part of the right side (upper side in FIG. 11) of this.

  As described above, the slide frame 132 is supported by the support column 32 so as to be slidable in the left-right direction. A plurality of wheels 134 arranged in the left-right direction are attached to the surface of each band plate portion 132a facing the support column 32. This wheel is attached so as to rotate about an axis parallel to the front-rear direction. On the other hand, the guide rail 35 is being fixed to each surface of the front side surface 32a and the back side surface 32b of the support | pillar 32 (refer FIG. 13). The guide rail 35 is formed with a groove portion that rotatably accommodates the wheel 134 along the left-right direction. Therefore, the wheel 134 moves while rotating in the left-right direction while the movement in the up-down direction is restricted by the guide rails 35 on the side surfaces 32a, 32b. As a result, the slide frame 132 is supported by the support column 32 so as to be slidable in the left-right direction. A stopper (not shown) is installed at a predetermined position of the slide frame 132 in order to prevent a moving mechanism 160 (described later) from colliding with the lower blade holder 62 and the lower blade frame 60 during sliding. This stopper abuts on a predetermined position of the column 32 and defines the stroke length of the slide frame 132.

  The moving mechanism 160 is connected to an end portion of the strip plate portions 132a and 132b of the slide frame 132 opposite to the side to which the connecting portion 132c is connected. That is, the moving mechanism 160 is positioned between the support columns 32 when the slide frame 132 is supported by the support columns 32. The moving mechanism 160 is fixed to the slide frame 132 along the front-rear direction, and transmits power to the rail 162 extending in the front-rear direction, sprockets 163, 164 installed in front and rear of the rail 162, and the sprocket 163. The gearbox 150 includes a chain 166 that is attached to the sprockets 163 and 164 and has both ends connected to the front and rear of the carriage 140.

  A carriage 140 is placed on the rail 162. As shown in FIG. 13, convex guide portions 162b and 162b are formed on the left and right ends of the upper surface 162a of the rail 162 so as to extend in the front-rear direction. The carriage 140 is installed between the guide portions 162b and 162b, and its moving direction is restricted. As shown in FIG. 15, a liner 167 for preventing wear may be laid between the upper surface 162 a of the rail 162 and the carriage 140.

  The sprockets 163 and 164 are installed on the upper surface 162 a of the rail 162. The rotation axes of the sprockets 163 and 164 are parallel to the left-right direction. Therefore, the chain 166 attached to the sprockets 163 and 164 circulates on a plane orthogonal to the left-right direction. The carriage 140 connected to the chain 166 needs to be positioned under the flange 63 of the lower blade holder 62. Accordingly, the sprocket 164 is positioned forward of the lower blade holder 62 on the rail 162, and the sprocket 163 is positioned rearward of the lower blade holder 62 on the rail 162.

  The gear box 150 includes drive parts such as a handle 152 and a gear (not shown), and outputs power (rotational force) generated by the rotation of the handle 152 from the output rotary shaft 154. The output rotation shaft 154 is connected to the sprocket 163 and rotates the sprocket. The rotation direction of the output rotation shaft 154 depends on the rotation direction of the handle 152 and can be rotated in either the clockwise direction or the counterclockwise direction. Note that a motor (not shown) may be used instead of the handle 152 for generating power.

  In the sprocket 163, a power distribution shaft 163a is attached to the side opposite to the side to which the output rotation shaft 154 is connected. A rod-shaped power distribution member (see FIG. 10) 170 is connected to the power distribution shaft 163a and the power distribution shaft in the other lower blade holder conveying device 130. Accordingly, the power from the gear box 150 is distributed to the other lower blade holder conveying device 130 via the power distribution member 170. The power distribution member 170 is detachably connected to each power distribution shaft. Therefore, when it is not necessary to drive the moving mechanism 160, such as when the workpiece W is cut, it is removed from the power distribution shaft 163a.

  As shown in FIGS. 14 and 15, the carriage 140 includes a carriage main body 142 and wheels 144. The carriage main body 142 is formed so as to have a concave portion opened upward as viewed from the side, and a mounting surface 142a for mounting the flange 63 of the lower blade holder 62, and front and rear of the mounting surface 142a (see FIG. 14 (left and right in FIG. 14). The protrusions 142b and 142b prevent the flange 63 of the lower blade holder 62 mounted on the mounting surface 142a from dropping off. A plurality of wheels 144 arranged along the left-right direction are attached to the inside of the carriage main body 142 using pins 146, and the carriage 140 can move along the rails 162. A chain 166 is connected to the front and rear portions of the carriage main body 142.

  In the above configuration, when the handle 152 is rotated in a predetermined direction, the sprocket 163 rotates in accordance with this rotation direction. For example, in FIG. 12, if the sprocket 163 rotates counterclockwise by the rotation of the handle 152, the chain 166 attached to the sprocket 163 also circulates counterclockwise. Accordingly, the carriage 140 connected to this chain is driven rearward (that is, leftward in FIG. 12), and moves on the rail 162 from the position indicated by the dotted line to the position indicated by the solid line. Further, when the handle 152 is rotated in the reverse direction, the rotation direction of the sprocket 163 and the circulation direction of the chain 166 are also reversed, and the carriage 140 moves forward (that is, rightward in FIG. 12). In addition, when each power distribution shaft 163a of a pair of lower blade holder conveying apparatus 130 is connected by the power distribution member 170, the sprocket 163 of each lower blade holder conveying apparatus 130 rotates at the same rotational speed. Accordingly, each carriage 140 moves in the front-rear direction in synchronization.

A method for removing the lower blade holder 62 in the present embodiment will be described.
FIG. 16 is a schematic diagram showing step by step a process of carrying out the lower blade holder 62 from the cutting device 20 using the lower blade holder conveying device 130. First, as shown in FIG. 16A, as a preparatory stage, before removing the lower blade holder 62 from the lower blade frame 60, the upper blade frame 40 is moved to the “blade maintenance position” using the rotary drive mechanism 80. Rotate to prevent collision with the lower blade holder 62. In this state, the lower blade holder conveying device 130, the lower blade holder 62, and the lower blade frame 60 are retracted toward each other so as not to interfere with each other.

  Next, as shown in FIG. 16B, the power unit 22 is controlled to raise the lower blade frame 60 to the top dead center. That is, the lower blade holder 62 is located at the highest place in the movement region M, and this position is higher than the placement surface of the carriage 140. That is, in this state, the lower blade holder conveying device 130 can be moved (inserted) toward the lower blade frame 60. At this time, the lower blade holder 62 remains fixed to the lower blade frame 60 by the linear cylinder 100.

  Next, as shown in FIG. 16 (c), from two directions (that is, the left direction and the right direction) that are horizontal and orthogonal to the insertion direction of the workpiece W, are moved downward from the flanges 63 of the lower blade holder 62. Each lower blade holder conveyance device 130 is moved so that each carriage 140 is positioned (in other words, each lower blade holder conveyance device 130 approaches each other or inward of the cutting device 20). Further, the power distribution shaft 163a of each lower blade holder conveying device 130 is connected by the power distribution member 170, and each carriage 140 is set to move in synchronization.

  Next, as shown in FIG. 16D, in a state where each carriage 140 is disposed under each flange 63, the fixing of the lower blade holder 62 to the lower blade frame 60 by the linear cylinder 100 is released. Specifically, the drive unit 104 of the linear cylinder 100 is moved forward (rightward in FIG. 16C) in the dovetail groove 70, and the engagement between the head 112 of the drive unit 104 and the dovetail groove 70 is released. . The lower blade holder 62 is released from the lower blade frame 60 by releasing this fixing. However, since the drive unit 104 (head 112) remains positioned in the dovetail groove 70, the movable direction of the lower blade holder 62 is limited to the vertical direction only.

  Next, as shown in FIG. 16 (e), the power unit 22 is controlled to gradually lower the lower blade holder 62 and the lower blade frame 60 from the top dead center, and the flange 63 of the lower blade holder 62 is moved to the carriage 140. The lower blade holder 62 is removed from the lower blade frame 60 while being placed on the placement surface 142a. That is, in a state where the lower blade holder 62 is supported from below using the carriage 140, the drive unit 104 of the linear cylinder 100 located in the dovetail groove 70 is extracted from below, and the lower blade holder 62 is removed from the lower blade frame 60. Completely free from.

  Thereafter, as shown in FIG. 16 (f), the handle 152 is rotated to move the carriage 140 rearward (that is, to the left in FIG. 16 (f)). As a result, the lower blade holder 62 is located on the downstream side of the transport line DL when viewed from the housing 30 of the cutting device 20. In order to attach a new lower blade holder 62 to the lower blade frame 60, the above steps may be followed in reverse.

  The lower blade holder 62 removed from the lower blade frame 60 by the above operation is carried out to a place away from the cutting region where the upper blade 44 and the lower blade 64 face each other without departing from the transport line DL. Therefore, the lower blade holder 62 can be separated from the cutting region without occupying the space on the side of the transport line DL, as compared with the method of carrying out the lower blade holder 62 in the direction orthogonal to the transport line DL. That is, the work on the lower blade holder 62 can be performed in a safe place with a good work environment. Furthermore, the attachment to the lower blade frame 60 of the lower blade holder 62 and the release from the lower blade frame 60 are performed by the vertical movement of the lower blade frame 60. Therefore, it is not necessary for an operator to enter the periphery of the cutting area for these operations, and safety can be ensured. That is, the present invention can provide a cutting device capable of replacing the lower blade safely and easily and a method for removing the lower blade holder in the cutting device.

  In this embodiment, the removed lower blade holder 62 is carried out to the downstream side of the transfer line DL when viewed from the housing 30 of the cutting device 20, but each lower blade holder transfer device 130 is installed symmetrically with respect to the housing 30. The lower blade holder 62 can also be configured to be carried out to the upstream side of the transport line DL when viewed from the housing 30. 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, 48a ... Center of rotation axis, 60 ... Lower blade frame, 62 ... Lower blade holder, 64 ... Lower Blade, 70 ... Dovetail groove, 80 ... Rotation drive mechanism, 90 ... Table, 90a ... Placement surface, 100 ... Linear cylinder, 130 ... Lower blade holder conveying device, 132 ... Slide frame, 140 ... Cart, 160 ... Moving mechanism,

Claims (4)

A cutting device that cuts a workpiece inserted between the upper blade and the lower blade by moving the lower blade toward the upper blade,
A lower blade holder to which the lower blade is fixed;
A lower blade frame that detachably holds the lower blade holder and moves up and down toward the upper blade;
A pair of lower blade holder conveying devices installed so as to be able to enter and exit the moving region of the lower blade holder when cutting the workpiece along a direction perpendicular to the insertion direction of the workpiece,
Each of the lower blade holder conveying devices is
In the moving region, a carriage on which one of both end portions of the lower blade holder removed from the lower blade frame is placed;
A cutting apparatus comprising: a moving mechanism that moves the carriage from the moving region of the lower blade holder in the insertion direction of the workpiece or in the opposite direction thereof.   The pair of lower blade holder conveying devices are connected by a power distribution member that distributes the power, and the power distribution member is detachable from each of the moving mechanisms. Cutting device. In the cutting device that cuts the workpiece inserted between the upper blade and the lower blade by moving the lower blade toward the upper blade,
Raise the lower blade holder to which the lower blade is fixed to a position higher than the mounting surface of the carriage together with the lower blade frame holding the lower blade holder,
Move the pair of carriages to the lower side of each end of the lower blade holder from two directions that are perpendicular to the insertion direction of the workpiece into the moving region of the lower blade holder when cutting the workpiece,
Lowering the lower blade holder and the lower blade frame, placing both ends of the lower blade holder on the pair of carriages, removing the lower blade holder from the lower blade frame,
A method for removing a lower blade holder, wherein the pair of carriages are moved from the moving region of the lower blade holder in the insertion direction of the workpiece or in the opposite direction.   The method for removing the lower blade holder according to claim 3, wherein the pair of carriages is moved by power distributed from one power.

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