JP2013123783A - Guillotine type cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guillotine type cutter having a long blade life and capable of securing favorable cutting.SOLUTION: An upper blade support plate 26 having an upper blade 28 attached thereto is supported to slide with respect to a cutter frame 20 by a linear motion bearing 32 and a slide rail 30, and configured so that the upper blade 28 may move in parallel. Thus, an intersection angle α° between the upper blade 28 and a lower blade 14 is not changed. The upper blade support plate 26 is energized by an upper blade pressurizing cylinder 36 to apply fixed pressure to the upper blade 28. The intersection angle α° is not changed, and the fixed pressure is applied to the upper blade 28. Thus, the blade life is prolonged, and the favorable cutting is secured.

Description

  The present invention relates to a guillotine type cutting machine.

  A guillotine-type cutting machine that cuts an object to be cut with a moving blade and a fixed blade is known (see Patent Document 1).

Japanese Utility Model Publication No. 61-40796.

In the guillotine type cutting machine disclosed in Patent Document 1, the movable blade is swingable with the support shaft as a fulcrum, the opposite side of the blade edge is biased by a spring, and the blade edge of the movable blade has a spring force against the fixed blade. It is configured to work.
By the way, since the cutting edge of the moving blade is inclined with respect to the horizontal plane, on the side where the height of the blade is short, the cutting edge (the fulcrum of the lever) to the cutting edge (the operating point of the lever). The distance from the support shaft to the blade tip is long on the side where the distance to the portion) is short and the height of the blade is long.
For this reason, the blade edge with the longer blade height has a smaller spring force against the fixed blade than the blade edge with the shorter blade height, and the blade height with the longer blade height is the blade height dimension. However, the sharpness is inferior compared to the short side, and the blade life also changes between the longer blade height and the shorter blade height. There was room left.

  In view of the above facts, the present invention aims to provide a guillotine-type cutting machine that can cut well.

  The guillotine type cutting machine according to claim 1, wherein the fixed blade and the blade edge intersect with the blade edge of the fixed blade at an intersecting angle α ° and tilt at a shear angle β ° when viewed from the moving direction. A moving blade that cuts the object to be cut by moving in the moving direction with respect to the fixed blade, and the fixed blade and the moving blade are contacted and separated in an out-of-plane direction while maintaining the crossing angle α. Guide means for freely guiding, and biasing means for biasing the fixed blade and the movable blade guided by the guide means in a direction approaching each other.

  According to the guillotine type cutting machine described in claim 1, the object to be cut disposed between the fixed blade and the moving blade can be cut by moving the moving blade in the moving direction for cutting.

  When the moving blade is viewed along the moving direction, the blade edge intersects the fixed blade edge at an intersecting angle α °, and the blade edge is inclined at a shear angle β ° with respect to the fixed blade edge. .

The guide means guides the movable blade or the fixed blade in an out-of-plane direction while maintaining a crossing angle α °.
The urging means urges the moving blade and the fixed blade guided by the guide means in a direction approaching each other.

  Therefore, by moving the moving blade in the moving direction when cutting, the fixed blade and the moving blade mesh with each other on one side in the longitudinal direction of the both blades while keeping the crossing angle α ° constant. As the moving blade continues to move with respect to the fixed blade, the contact (meshing) portion between the fixed blade and the moving blade moves to the other side in the longitudinal direction of both blades, and the crossing angle α ° is kept constant. The object to be cut is cut while the fixed blade or the moving blade moves in the out-of-plane direction.

  According to a second aspect of the present invention, in the guillotine-type cutting machine according to the first aspect, the guide means is a linear guide mechanism that linearly guides the fixed blade and the movable blade in the contact / separation direction.

  In the guillotine type cutting machine according to claim 2, the fixed blade and the movable blade are linearly guided in the contact / separation direction by the linear guide mechanism.

  A third aspect of the present invention is the guillotine-type cutting machine according to the second aspect, wherein the linear guide mechanism includes a linearly extending rail and a linear motion bearing that is linearly movable along the rail. It consists of

  In the guillotine type cutting machine according to claim 3, since the linear guide mechanism is configured to include a linearly extending rail and a linear motion bearing that is linearly movable along the rail, the fixed blade and the movable blade Are smoothly guided in a straight line in the contact / separation direction.

  According to a fourth aspect of the present invention, in the guillotine type cutting machine according to any one of the first to third aspects, the urging means applies a constant pressure to the cylinder and the piston of the cylinder. Pressure applying means for applying.

  In the guillotine type cutting machine according to the fourth aspect, the fixed blade and the movable blade are urged toward each other when the pressure applying means applies a constant pressure to the piston of the cylinder.

  According to a fifth aspect of the present invention, in the guillotine type cutting machine according to the fourth aspect, the pressure is air pressure.

  In the guillotine cutter according to the fifth aspect, pressure is applied to the piston by air pressure, and thereby the fixed blade and the movable blade are urged toward each other.

  A sixth aspect of the present invention is the guillotine type cutting machine according to any one of the first to third aspects, wherein the urging means is a constant load spring.

  In the guillotine type cutting machine according to the sixth aspect, the fixed blade and the movable blade are urged toward each other by the constant load spring. Since a constant load is obtained from the constant load spring, the fixed blade and the movable blade are urged with a constant load in a direction approaching each other.

  The cutting method according to claim 7, wherein a moving blade having a cutting edge that is inclined at a shear angle β ° and has a cutting edge that intersects the cutting edge of the fixed blade at a crossing angle α ° when viewed from the moving direction is the crossing angle α. The object to be cut is cut while maintaining a degree and contacting the cutting edge of the fixed blade with a constant force.

  In the cutting method according to claim 7, the movable blade having a cutting edge that is inclined at a shear angle β ° and intersects the cutting edge of the fixed blade at an intersecting angle α ° when viewed from the moving direction is an intersecting angle α °. The object to be cut is cut while maintaining a constant contact with the fixed blade edge with a constant force.

  As described above, the guillotine type cutting machine of the present invention has an excellent effect that the blade has a long life and can be cut well.

  According to the guillotine type cutting machine of the second aspect, the fixed blade and the movable blade are linearly guided in the contact / separation direction.

  According to the guillotine type cutting machine of the third aspect, the fixed blade and the movable blade are smoothly guided linearly in the contact / separation direction.

  According to the guillotine type cutting machine of the fourth aspect, the fixed blade and the movable blade can be urged toward each other by applying a certain pressure to the piston of the cylinder. Further, the urging force can be easily changed by changing the pressure.

  According to the guillotine type cutting machine of the fifth aspect, the fixed blade and the movable blade are urged toward each other by air pressure.

  According to the guillotine type cutting machine of the sixth aspect, the fixed blade and the movable blade are biased toward each other with a constant load by the constant load spring.

  According to the cutting method according to claim 7, since the movable blade and the fixed blade contact with a constant force while maintaining the crossing angle α ° and the shear angle β °, the object to be cut is cut. Has an excellent effect that it has a long life and can be cut well.

It is a perspective view showing a schematic structure of a guillotine type cutting machine concerning a 1st embodiment. It is a top view of a lower blade support plate. (A) is the top view which looked at the upper blade and lower blade of the initial state from the upper part, (B) is the front view of the principal part which shows the relationship between the upper blade and lower blade of a guillotine type cutting machine of an initial state. (C) is a 3-3 line sectional view of Drawing 1, and (D) is a right side view of an upper blade and a lower blade of an initial state. It is a pneumatic circuit diagram which drives the upper blade pressurizing cylinder. (A) is the front view of the principal part which shows the relationship of the upper blade and lower blade of a guillotine type cutting machine at the time of a cutting start, (B) is the time of the cutting start equivalent to the 3-3 sectional view of FIG. It is sectional drawing. (A) is the top view which looked at the upper blade and lower blade in the middle of a cutting process from the upper part, (B) is the front view of the principal part which shows the relationship between the upper blade and lower blade of a guillotine type cutting machine in the middle of a cutting process (C) is a sectional view in the middle of the cutting process corresponding to the sectional view taken along line 3-3 in FIG. (A) is the top view which looked at the upper blade and the lower blade at the time of completion | finish of cutting from the upper direction, (B) is the front view of the principal part which shows the relationship between the upper blade and the lower blade of a guillotine type | mold cutting machine at the time of cutting completion (C) is a cross-sectional view at the end of cutting corresponding to the cross-sectional view taken along line 3-3 in FIG. It is sectional drawing of the principal part of the guillotine type cutting machine which concerns on 2nd Embodiment.

[First Embodiment]
A guillotine-type cutting machine 10 according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view showing a schematic configuration of a guillotine type cutting machine 10 of the present embodiment, FIG. 2 is a plan view of a lower blade support plate and a lower blade, and FIG. 3A is an upper blade and a lower blade. FIG. 3B is a front view of the main part showing the relationship between the upper blade and the lower blade of the guillotine cutting machine 10, and FIG. FIG. 3D is a cross-sectional view taken along line 3, and FIG. 3D is a right side view of the upper blade and the lower blade.

  As shown in FIGS. 1-3, the guillotine type cutting machine 10 of this embodiment is provided with the rectangular lower blade support plate 12 arrange | positioned horizontally and extended in the left-right direction (drawing arrow A direction) by front view. . The upper surface of the lower blade support plate 12 is a horizontal plane.

A long lower blade 14 is attached to the back surface (the surface on the arrow B direction side) of the lower blade support plate 12 as a fixed blade extending in a straight line and having a constant width and a constant thickness.
The upper end of the lower blade 14 is at the same height as the upper surface of the lower blade support plate 12, and a blade edge 14 </ b> A is formed at the upper corner of the back surface (arrow B direction side) of the lower blade 14.

  As shown in FIG. 2, when the lower blade support plate 12 and the lower blade 14 are viewed from above, the lower blade 14 has a cutting edge 14 </ b> A in the longitudinal direction of the lower blade support plate 12 (arrow A direction and arrow A direction). Is fixed to the lower blade support plate 12 so as to be inclined at an angle α ° (same as an intersecting angle α ° with the upper blade 28 described later).

As shown in FIG. 1, the lower blade support plate 12 is provided with a pair of slide shafts 16 extending in the vertical direction at both ends in the longitudinal direction.
The upper ends of these slide shafts 16 are connected by a rectangular upper base 18.

A cutter frame 20 is disposed between the lower blade support plate 12 and the upper base 18.
A linear bush 22 is attached to the cutter frame 20, and the slide shaft 16 is slidably inserted into the linear bush 22.
For this reason, the cutter frame 20 is supported by the slide shaft 16 so as to be movable in the vertical direction.

A vertical movement cylinder 24 for moving the cutter frame 20 in the vertical direction is attached to the lower surface of the upper base 18 with the axial direction directed in the vertical direction. The piston rod 24 </ b> A of the vertically moving cylinder 24 has a tip fixed to the cutter frame 20.
A rectangular upper blade support plate 26 extending horizontally along the arrow A direction and the arrow A direction is horizontally disposed below the cutter frame 20.

  As shown in FIGS. 3A to 3D, the side of the upper blade support plate 26 on the arrow B direction side is paired with the lower blade 14 and extends along the arrow A direction and the arrow A direction as viewed from above. An upper blade 28 is attached as a moving blade having a constant thickness extending linearly.

  As shown in FIGS. 3B and 3D, the upper blade 28 has a cutting edge 28A formed at the corner on the lower front side (the opposite direction to the arrow B direction). As shown in B), the cutting edge 28A is inclined at an angle (shear angle) β ° with respect to the horizontal direction (relative to the cutting edge 14A of the lower blade 14) so that the arrow A direction side is the lower side. . Therefore, the width of the upper blade 28 in the vertical direction is formed such that the arrow A direction side is wide and the opposite side to the arrow A direction is narrow.

  Further, the upper blade 28 is formed with a chamfered relief 28B at the lower corner of the arrow A direction side opposite to the arrow B direction side. The escape 28B has a triangular shape when the upper blade 28 is viewed from the front.

As shown in FIGS. 1 and 3C, a pair of slide rails 30 extending in the front-rear direction (arrow B direction) and having a substantially rectangular cross section are attached to the upper surface of the upper blade support plate 26. ing. These slide rails 30 are supported by linear motion bearings 32 attached to the lower surface of the cutter frame 20 via connection brackets 31. For this reason, the upper blade support plate 26 can move smoothly with respect to the cutter frame 20 in the front-rear direction (the direction of arrow B and the direction opposite to the direction of arrow B. The contact / separation direction of the invention).
The slide rail 30 and the linear motion bearing 32 constitute a linear guide mechanism.

  A cylinder mounting plate 34 is fixed to the front surface of the cutter frame 20 (on the side opposite to the arrow B direction). An upper blade pressurizing cylinder 36, which is an air cylinder, is horizontally mounted on the cylinder mounting plate 34.

  As shown in FIGS. 1 and 3C, the piston rod 36 </ b> A of the upper blade pressurizing cylinder 36 is provided in parallel with the slide rail 30, and the tip 38 is attached to the upper blade support plate 26. It is fixed to.

  As shown in the air circuit diagram of FIG. 4, the upper blade pressurizing cylinder 36 includes a two-position five-port switching valve 40, which is an electromagnetic valve, a pressure gauge 41, a regulator (pressure reducing valve) 42, a silencer 44, An air pressure control device 50 including an air tank 46, an air compressor 48 and the like is connected.

  Here, when the spool (not shown) of the 2-position 5-port switching valve 40 is switched to the first position, the compressed air in the air tank 46 is compressed in the direction indicated by the arrow B of the upper blade pressurizing cylinder 36. The second air chamber 54 that acts on the air chamber 52 and is opposite to the arrow B direction of the upper blade pressurizing cylinder 36 communicates with the atmosphere. Therefore, in FIG. 3C, the upper blade support plate 26 connected to the upper blade pressurizing cylinder 36 is urged in the direction opposite to the arrow B direction.

  On the other hand, when the spool (not shown) of the 2-position 5-port switching valve 40 is switched to the second position, the compressed air of the air tank 46 acts on the second air chamber 54 of the upper blade pressurizing cylinder 36, and the upper The first air chamber of the blade pressurizing cylinder 36 communicates with the atmosphere. Therefore, in FIG. 3C, the upper blade support plate 26 connected to the upper blade pressurizing cylinder 36 is urged in the arrow B direction.

(Action)
The operation of the guillotine cutter 10 according to this embodiment will be described below.
(1) FIG. 3 shows an initial state of the guillotine cutter 10.
As shown in FIG. 3A, the guillotine type cutting machine 10 has an upper blade 28 spaced above the lower blade 14 in the initial state.

  Here, when the cut object 56 is cut by the guillotine cutting machine 10, the cut object 56 is disposed on the lower blade support plate 12, as shown in FIGS. 3 (B) and 3 (C).

  When cutting the workpiece 56, the spool of the 2-position 5-port switching valve 40 is switched to the first position in advance, and the upper blade support plate 26 is biased in the direction opposite to the arrow B direction. . Since the regulator 42 is interposed between the air tank 46 and the first air chamber 52, a predetermined pressure set by the regulator 42 can be applied to the first air chamber 52 of the upper blade pressurizing cylinder 36. In this manner, a pressure that presses the upper blade 28 against the lower blade 14, that is, a so-called pressurizing force, can be applied to the upper blade 28.

  In the initial state, the upper blade support plate 26 is biased in the direction opposite to the arrow B direction, so that the end of the upper blade support plate 26 on the opposite direction side to the arrow B direction as shown in FIG. The portion is in contact with the side surface of the cylinder mounting plate 34.

(2) In the initial state, as shown in FIG. 3 (D), at the end of the upper blade 28 and the lower blade 14 on the arrow A direction side, the cutting edge 14A of the lower blade 14 becomes the relief 28A of the upper blade 28. It corresponds. The upper blade 28 is biased in the direction opposite to the arrow B direction, the upper blade 28 and the lower blade 14 intersect at an intersecting angle α °, and the cutting edge 28A of the upper blade 28 has a lower side in the arrow A direction side. It is inclined at an angle β ° with respect to the horizontal direction so as to be on the side. Accordingly, when the vertical movement cylinder 24 is driven and the cutter frame 20 is lowered, the upper blade 28 comes into contact with the cutting edge 14A of the lower blade 14 from the relief 28 as shown in FIGS. 5 (A) and 5 (B). Begin to.

(3) When the cutter frame 20 is further lowered, as shown in FIG. 6B, the contact point P between the cutting edge 28A of the upper blade 28 and the cutting edge 14A of the lower blade 14 moves in the direction opposite to the arrow A direction. Then, the cutting of the workpiece 56 proceeds. As shown in FIG. 6 (A), the lower blade 14 and the upper blade 28 have a crossing angle α ° when viewed from above, and the cutting edge 28A of the upper blade 28 has the arrow A direction side on the lower side. Since it is inclined at an angle β ° (see FIG. 6B) with respect to the horizontal direction, when the cutter frame 20 is lowered and the contact point P moves in the direction opposite to the arrow A direction, the upper blade 28 is moved downward. It is pushed by the blade 14 and moves in the direction of arrow B which is the out-of-plane direction of the upper blade 28.
As shown in FIG. 6C, the out-of-plane direction of the upper blade 28 is a direction orthogonal to the side surface 28C of the upper blade 28 having a long plate shape with a certain thickness, that is, an arrow. It is the direction opposite to the B direction and the arrow B direction.

  Since the upper blade 28 moves in the direction of the arrow B along the longitudinal direction of the slide rail 30, the crossing angle α ° between the upper blade 28 and the lower blade 14 is always constant without changing depending on the position of the upper blade 28. It is. Further, the upper blade 28 is urged by the upper blade pressurizing cylinder 36, and the upper blade 28 is pressed against the side surface of the lower blade 14 with a constant force, so that the sharpness does not change depending on the cutting position.

(4) When the cutter frame 20 is further lowered, the upper blade 28 and the lower blade 14 are completely overlapped when viewed from the front, and the cutting of the workpiece 56 is completed (see FIG. 7B).
Thus, according to the guillotine type cutting machine 10 of the present embodiment, the upper blade 28 is lowered so that the upper blade 28 and the lower blade 14 come into contact at one point while keeping the crossing angle α ° constant. A constant pressure is applied to the upper blade 28 by the upper blade pressurizing cylinder 36, and the workpiece 56 is cut while moving the contact portion (contact point P) in the longitudinal direction of the blade edge. 28 and the lower blade 14 can be extended, and the material to be cut 56 can be cut well from the beginning of cutting to the end of cutting.

  When the cutting is not performed, the linear motion bearing 32 is moved in a direction opposite to the pressurizing direction or reciprocated with respect to the slide rail 30, thereby rolling the linear motion bearing 32 (ball: not shown). ) Can be operated for lubrication to prevent the oil film from being cut off at the portion in contact with it, whereby the durability of the linear motion bearing 32 can be ensured. To reciprocate the linear motion bearing 32, the spool of the 2-position 5-port switching valve 40 may be switched alternately between the first position and the second position.

In the guillotine type cutting machine 10 of the present embodiment, the pressurization of the upper blade 28 can be easily changed only by changing the set value of the regulator 42. Further, the pressurization of the upper blade 28 can be changed by changing the upper blade pressurizing cylinder 36 to one having a different diameter.
The pressurization can be calculated by the area of the piston of the upper blade pressurizing cylinder 36 x air pressure.
A relief valve may be connected to the upper blade pressurizing cylinder 36 so that the internal pressure of the upper blade pressurizing cylinder 36 does not rise above a specified pressure.

In the above embodiment, the number of upper blade pressurizing cylinders 36 is one, but the pressurization can be changed by increasing the number of upper blade pressurizing cylinders 36.
The pressurization of the upper blade 28 can be arbitrarily changed, for example, when the type of the material to be cut 56 or the sharpness is lowered.

[Second Embodiment]
Next, a guillotine cutter 10 according to a second embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 8, in the guillotine type cutting machine 10 of the present embodiment, a constant load spring 58 is used instead of the upper blade pressurizing cylinder 36.

  The end portion of the spring 58 </ b> B drawn out from the drum 58 </ b> A of the constant load spring 58 is fixed to the block 38 via the shaft 60. The spring 58B of the constant load spring 58 biases the upper blade support plate 26 in a direction opposite to the arrow B direction with a constant load. Thereby, a pressurizing force can be applied to the upper blade 28. A coil spring or the like can be used instead of the constant load spring 58.

[Other Embodiments]
In the above embodiment, the upper blade pressurizing cylinder 36 is driven by air pressure, but other urging means such as a hydraulic cylinder may be used.
In the above embodiment, two sets of the linear motion bearing 32 and the slide rail 30 are used to support the upper blade support plate 26, but one set may be used as long as the upper blade support plate 26 can be translated.

In the above embodiment, the slide rail 30 is connected to the upper blade support plate 26, and the linear motion bearing 32 is connected to the cutter frame 20. However, even if the linear motion bearing 32 and the slide rail 30 are attached in reverse. good.
In the above embodiment, the linear motion bearing 32 and the slide rail 30 are used to support the upper blade support plate 26. However, the present invention is not limited to this, and other linear guide mechanisms (guides) such as a linear bush and a shaft having a circular section. Means) may be used.

  In the above embodiment, the upper blade 28 can be moved in the direction of the arrow B and the direction opposite to the direction of the arrow B using the linear motion bearing 32 and the slide rail 30. It is good also as a structure which can move the lower blade 14 to the direction opposite to the arrow B direction and the arrow B direction using the slide rail 30. FIG. In this case, the lower blade 14 may be configured to apply pressure to the lower blade 14 with an air cylinder so as to press the lower blade 14 against the upper blade 28.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

10 Guillotine cutting machine 14 Lower blade (fixed blade)
28 Upper blade (moving blade)
30 Slide rail (straight guide mechanism, guide means, rail)
32 Linear motion bearing (linear guide mechanism, guide means, moving block)
26 Upper blade support plate (guide means)
34 Cylinder mounting plate (guide means)
36 Upper blade pressurizing cylinder (biasing means, cylinder)
50 Pneumatic control device (biasing means, pressure applying means)
α ° Crossing angle β ° Shear angle

Claims (7)

A fixed blade;
When the cutting edge is viewed from the moving direction, it intersects the cutting edge of the fixed blade at an intersecting angle α ° and is inclined at a shear angle β °, and moves in the moving direction with respect to the fixed blade. A moving blade for cutting the object to be cut;
Guide means for maintaining the intersecting angle α and guiding the fixed blade and the movable blade in an out-of-plane direction;
Biasing means for biasing the fixed blade and the movable blade guided by the guide means in a direction approaching each other;
Guillotine type cutting machine equipped with.   The guillotine type cutting machine according to claim 1, wherein the guide means is a linear guide mechanism that linearly guides the fixed blade and the movable blade in a contact / separation direction.   The guillotine-type cutting machine according to claim 2, wherein the linear guide mechanism includes a linearly extending rail and a linear motion bearing that is linearly movable along the rail.   The guillotine cutter according to any one of claims 1 to 3, wherein the urging unit includes a cylinder and a pressure applying unit that applies a constant pressure to the piston of the cylinder.   The guillotine cutter according to claim 4, wherein the pressure is air pressure.   The guillotine type cutting machine according to any one of claims 1 to 3, wherein the biasing means is a constant load spring.   A moving blade having a cutting edge that is inclined at a shear angle β ° and has a cutting edge that intersects the cutting edge of the fixed blade at a crossing angle α ° when viewed from the moving direction maintains the crossing angle α °, and A cutting method that cuts the workpiece while making contact with the blade edge with a certain force.

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