JP6068533B2 - Sheet material cutting device - Google Patents

Description

  The present invention relates to a sheet material cutting device, and more particularly to a sheet material cutting device that cuts a sheet material by meshing a pair of reciprocally rotating driving round blades and driven circular blades.

  In recent years, for example, when producing a photo album, there is an increasing demand for variably controlling a cutting position (slit position) in a direction orthogonal to the sheet material conveyance direction. For such applications, for example, a sheet that can be moved in the axial direction of the screw shaft by a feed screw mechanism that is disclosed in Patent Documents 1 to 4 and that includes a screw shaft and a nut. A material cutting device can be used. Further, for example, a sheet material cutting that can individually move both a pair of round blades in the axial direction of the screw shaft by a feed screw mechanism that is composed of two sets of screw shafts and nuts disclosed in Patent Document 5. An apparatus can be used.

JP-A-1-306196 JP-A-7-241799 JP 7-241800 A JP 2007-144575 A JP-A-8-197491

  In general, in a feed screw mechanism including a screw shaft and a nut, a screw feed by engagement of the screw shaft and the nut is made free by providing a clearance in the screw portion. Therefore, in the sheet material cutting device disclosed in Patent Documents 1 to 5 that position a pair of round blades using a general feed screw mechanism, the sheet material is being cut due to the clearance provided in the screw portion. The nut sometimes moved slightly. For example, the fine movement of the nut caused by the radial clearance of the screw portion causes the meshing point of the pair of round blades to swing around the axis of the screw shaft, so that the sheet material is moved up and down (in the thickness direction of the sheet material). To change the cutting point up and down. Further, the fine movement of the nut caused by the clearance in the thrust direction of the screw portion causes the meshing point of the pair of round blades to vibrate in the axial direction of the screw shaft, so that the sheet material is left and right (perpendicular to the thickness direction of the sheet material). To change the cutting point left and right. Such swinging and vibration of the meshing point of the pair of round blades resulting from the fine movement of the nut has been a factor that degrades the straightness of cutting and the dimensional accuracy of cutting of the sheet material cutting device.

  As a countermeasure against the fine movement of the nut as described above, it has been considered to be particularly effective to adopt a ball screw mechanism that can be said to have substantially no clearance since each bearing ball is engaged with the screw shaft while rolling. However, the ball screw mechanism operates smoothly with a small driving load by rolling of the bearing ball and can be positioned with high accuracy, but is structurally large and expensive. For this reason, it has been difficult to find a configuration of a sheet material cutting device that satisfies the demand for compactness and cost reduction, which has been increasing in recent years.

  The object of the present invention is to solve the problems of straight cutting of the sheet material due to fine movement of the nut caused by the gap between the screw shaft and the nut in the feed screw mechanism constituted by the conventional screw shaft and nut, and deterioration of the cutting dimensional accuracy, It is an object of the present invention to provide a practical sheet material cutting device that satisfies the demand for cost reduction and compactness.

  The present inventor configures the drive round blade to be movable in the drive axis direction out of the pair of round blades, and suppresses the oscillation of the driven round blade around the drive shaft and the vibration of the screw shaft in the axial direction. It has been found that the above-described problem can be solved by the configuration to achieve the present invention.

That is, the sheet material cutting device according to the present invention is attached to a driven round blade that is rotated by the rotation of the drive shaft and is movable in the axial direction of the drive shaft by the drive round blade moving portion, and the driven shaft. And a driven round blade whose rotation about the axis of the drive shaft is suppressed by a driven round blade swing suppression portion and which is driven by rotation of the drive round blade. A screw shaft that is rotatably supported, a nut that moves in the axial direction of the screw shaft by rotation of the screw shaft, a preload portion that preloads the nut in one of the axial directions of the screw shaft, and the nut is attached And a slide base that engages with the driving round blade and rotatably supports the driven shaft, and the driven round blade swing suppressing portion is attached to the main body frame and the screw. Clamping comprising an elongate portion having a flat plate extending in the axial direction, a pair of rollers which is movably configured rolling in the axial direction of the conjunction is attached to the slide base to sandwich the flat plate of the extension portion and the screw shaft of the Part.

Further, the slide base has a bearing, said drive shaft is communicated to said bearing, that is configured to be swingable movable and axially around the axial direction of the drive shaft by the drive shaft Is preferred.
Moreover, it is preferable that the said slide base is comprised by the combination of the 1st slide base containing the structure which attaches the said nut, and the 2nd slide base containing the structure which supports the said driven shaft.

  According to the present invention, since the fine movement of the nut due to the clearance of the screw portion in the feed screw mechanism constituted by the screw shaft and the nut can be suppressed, it is possible to improve the straightness of cutting and the accuracy of the cutting dimension of the sheet material cutting device. Become. Therefore, it is possible to provide a practical sheet material cutting device that satisfies the demand for cost reduction and compactness.

It is the figure which looked at the structural example of the sheet material cutting device which concerns on invention from the carrying-in side of a sheet material. It is the figure which looked at the structural example shown in FIG. 1 from the carrying-out side of the sheet material. It is the figure which abbreviate | omitted a part of structural example shown in FIG. 1, and looked at the principal part from the carrying-in side of the sheet | seat material. FIG. 4 is a diagram in which a part of the configuration example shown in FIG. 3 is omitted, and a cross section of a main part is viewed from a sheet material carrying-in side. FIG. 4 is a diagram in which a part of the configuration example shown in FIG. 3 is omitted, and a cross-section of the main part is viewed from the left side of the drive shaft in FIG. 3. FIG. 4 is a diagram in which a part of the configuration example illustrated in FIG. 3 is omitted, and a main part is viewed from a left oblique side on a sheet material carry-out side. FIG. 4 is a diagram in which a part of the configuration example illustrated in FIG. 3 is omitted and a main part is viewed from a right oblique side on a sheet material carry-out side. FIG. 7 is a diagram showing a configuration on the right side of the drive shaft omitted in FIG.

The sheet material cutting device according to the present invention includes a driving round blade configured to be rotated by the rotation of the driving shaft and movable in the driving shaft direction by the driving round blade moving portion, and the rotation of the driving round blade attached to the driven shaft. And a driven round blade whose rotation around the drive shaft is suppressed by the driven round blade oscillation suppressing portion. In the sheet material cutting device according to the present invention having this configuration, the driven round blade presses against the driving round blade to form a meshing point, and the driving round blade and the driven round blade rotate at the meshing point while reciprocally rotating. The material can be cut. Therefore, the sheet material can be cut in the longitudinal direction of the sheet material, that is, the conveyance direction by disposing the drive shaft that supports the drive round blade in a direction orthogonal to the conveyance direction of the sheet material.
Note that the sheet material can be cut in the width direction of the sheet material, that is, in the direction orthogonal to the conveyance direction, by arranging the drive shaft along the conveyance direction of the sheet material.

(Driving round blade and driven round blade)
The pair of driving round blades and driven round blades are disc-shaped or columnar cutting blades provided with cutting edges on the outer periphery thereof. In addition, a drive shaft is provided at the rotation center of the drive round blade, and a driven shaft is provided at the rotation center of the driven round blade. The cutting edges of the driving round blade and the driven round blade are pressed against each other in an intersecting state called toe-in to form one meshing point. For this pressure contact, for example, a structure in which a coil spring is mounted in the driven shaft direction and the driven round blade is pushed toward the driving round blade by the coil spring is preferable because the structure of the apparatus becomes simple. With the configuration described above, the driving round blade can be rotated by the rotation of the driving shaft, and the driven round blade can be rotated via the meshing point. Therefore, the sheet material can be cut by forming the meshing points while the pair of driving round blades and the driven round blades rotate in the opposite directions.

(Drive shaft and driven shaft)
The drive shaft is rotatably supported by, for example, a bearing, and is attached to a metal or resin main body frame or a support member attached to the main body frame. The driven shaft is rotatably supported by a bearing, for example, and is attached to the slide base. Therefore, by positioning the slide base with respect to the main body frame or the support member attached to the main body frame, the positional relationship between the drive shaft and the driven shaft can be kept stable. The positional relationship can also be kept stable. Furthermore, by keeping the position of the meshing point of the driving round blade and the driven round blade stable, it is possible to improve the straightness of cutting and the accuracy of cutting dimensions in cutting the sheet material.

(Driving round blade moving part)
One of the features of the sheet material cutting device according to the present invention is that it has a drive round blade moving part. The drive round blade moving unit can move the drive round blade in the drive axis direction, and thereby determine the cutting position of the sheet material. Specifically, the drive round blade moving unit includes a screw shaft rotatably supported by the main body frame, a nut that moves in the screw shaft direction by rotation of the screw shaft, and a preload that preloads the nut in one of the screw shaft directions. And a slide base that attaches a nut and engages with the driving round blade and rotatably supports the driven shaft.

(Preload section)
The preload part provided in the driving round blade moving part is important. By providing the preload portion, the position of the meshing point formed by the driving round blade and the driven round blade in the driving shaft direction can be kept stable. As described above, in the feed screw mechanism including the screw shaft and the nut, it is common to provide a clearance in the screw portion for the purpose of enabling screw feed. The feed screw mechanism, which is simply composed of a screw shaft and nut, has a particularly simple mechanical structure compared to the ball screw mechanism, but it has special functions for high-precision positioning of the moving object and stable maintenance of the stationary state. Inferior to In order to compensate for a part of the function that does not reach the ball screw mechanism, a preload portion is provided in the driving round blade moving portion, and a function of preloading the nut in one of the screw shaft directions is added. By having this preload portion, vibration in the screw shaft direction of the nut due to the clearance in the thrust direction of the screw portion can be suppressed. In addition, since the preload part which concerns on this invention uses a spring structure, for example, a coil spring, a leaf | plate spring, rubber | gum, etc. which have elasticity performance, since an apparatus structure becomes simple, it is preferable. The magnitude of the preload is preferably set in consideration of the driving force of the feed screw mechanism by the screw shaft and the nut, the mechanical hardness of the screw portion, and the like.

(Screw shaft and nut)
The screw shaft and the nut engage with each other at the screw portion and function as a feed screw mechanism. The screw shaft is rotatably supported by, for example, a bearing, and is attached to the main body frame or a support member attached to the main body frame. The nut is moved and positioned in the screw shaft direction by the rotation of the screw shaft. Further, the screw portion is provided with an appropriate clearance in the radial direction so that the screw feeding operation is smooth. The cutting position of the sheet material can be performed by moving the nut by a predetermined amount in the screw shaft direction and stationary and positioning at the predetermined position. In this case, the amount of movement of the nut can be controlled based on, for example, the rotational speed or rotational angle of the screw shaft and the resolution in consideration of the lead of the screw portion.

(Slide base)
The slide base is attached with a nut, engages with the driving round blade, and rotatably supports the driven shaft. The slide base has, for example, a bearing, a drive shaft communicates with the bearing, and can be configured to be movable in the direction of the drive shaft by the drive shaft and swingable around the drive shaft. This configuration can reduce the resistance when moving the slide base in the direction of the drive axis. This reduces power when driving the slide base for positioning (energy saving), stabilizes positioning, improves accuracy, etc. The effect can be expected. In addition, the slide base can be configured by, for example, a combination of a first slide base including a configuration for attaching a nut and a second slide base including a configuration for supporting the driven shaft. The slide base is not limited to the configuration using the two members of the first slide base and the second slide base, and may be configured using three or more members as desired. By constructing the slide base using multiple members, there are many effects such as compactness and weight reduction by improving the degree of freedom of device configuration, simplification and easy processing of the members used, and cost reduction as a result. Can be obtained.

  The slide base having the above-described configuration can move in the screw shaft direction by moving the nut in the screw shaft direction. Further, by this movement of the slide base, the driving round blade and the driven round blade can be simultaneously moved in the driving axis direction. The slide base configured to be movable in the axial direction of the screw shaft and the drive shaft in this manner is supported by or attached to the main body frame or a support member attached to the main body frame. Therefore, the positional relationship with the main body frame can be adjusted on the drive shaft. In other words, since the slide base can be positioned with respect to the main body frame, the sheet material being conveyed can be positioned with respect to the main body frame, whereby the driving round blade with which the slide material engages can be positioned. it can. Therefore, the meshing point formed by the driving round blade and the driven round blade can be positioned with respect to the sheet material.

(Driven round blade swing suppression part)
One of the features of the sheet material cutting device according to the present invention is that it has a driven round blade swing suppressing portion. The driven round blade swing suppressing part is configured to be attached to the main body frame and extend in the screw axis direction, and to be attached to the slide base and to be able to move in the screw axis direction while sandwiching a part of the extension part. And a sandwiching portion. The configuration having the extending portion and the clamping portion provided in the driven round blade swing suppressing portion is important. With this configuration, the position of the meshing point formed by the driving round blade and the driven round blade around the driving shaft can be kept stable.

(Extension part and clamping part)
The extending portion is attached to the main body frame and is disposed in the screw shaft direction. The clamping part is attached to the slide base, and is configured to be movable in the screw axis direction by clamping a part of the extension part. In this configuration, the holding portion at the time of stopping that is not moving in the screw shaft direction holds a part of the extending portion attached to the main body frame, thereby suppressing vibration and swinging around the screw shaft. For example, the clamping unit described above preferably has a pair of rollers supported so as to be able to roll and move in the screw axis direction. Since the frictional resistance is smaller than sliding, the movement resistance of the clamping unit is reduced. In addition, the movement of the clamping part that clamps a part of the extension part in the screw shaft direction is not limited to the rolling movement of a pair of rollers, for example, the meshing movement of a rack and pinion or a belt and a pulley, a wire pulley or a sliding The sliding of a bearing etc. can be used.

  As described above, the screw shaft and the screw part of the nut are provided with appropriate clearance in the radial direction so that the screw feeding operation is smooth, so that the nut vibrates in the radial direction or swings around the screw shaft. there's a possibility that. The vibration or swing of the nut is the vibration or swing of the slide base to which the nut is attached, and the vibration or swing of the driven round blade supported by the slide base via the driven shaft. Therefore, when the nut is vibrated or oscillated due to the radial clearance, the meshing point formed by the driven round blade and the driving round blade oscillates or oscillates around the driving shaft. In response to this problem, the vibration and oscillation of the nut in the radial direction can be suppressed by providing the driven round blade oscillation suppressing portion having the extending portion and the clamping portion described above. Specifically, by attaching the clamping portion, in which vibration and swing around the screw shaft are suppressed, to the slide base, vibration and swing around the screw shaft of the slide base or the drive shaft can be suppressed. It is possible to suppress the driven round blade supported by the slide base via the driven shaft and the swinging of the meshing point related to the driven circular blade around the drive shaft.

  In the sheet material cutting device according to the present invention having the configuration described above, the engagement point formed by the drive round blade and the driven round blade is positioned with high precision at a predetermined position for cutting by the drive round blade moving unit. be able to. Also, with respect to the problem of the meshing point vibration and swinging, the driven round blade moving part having the preloading part can suppress the vibration in the driving shaft direction, and the driven circle having the clamping part that clamps a part of the extending part. The blade swing suppressing portion can suppress vibration and swing around the drive shaft. Therefore, the meshing point suppresses the occurrence of a phenomenon that the sheet material cutting point fluctuates up and down and left and right by pushing the sheet material left and right (drive shaft direction) and up and down (direction orthogonal to the sheet material). It is possible to improve the straightness of cutting and the cutting dimensional accuracy of the cutting device.

  Next, an embodiment of the sheet material cutting device according to the present invention will be specifically described, and a configuration example of the sheet material cutting device (hereinafter simply referred to as “cutting device”) according to the present invention shown in FIGS. This will be described in detail with reference to FIG. The scope of the present invention is not limited to the embodiments described below.

  FIG. 1 is a view of the cutting device as viewed from the sheet material carry-in side. FIG. 2 is a view of the cutting device as seen from the sheet material carry-out side. FIG. 3 is a diagram in which a part of the cutting device is omitted and the main part is viewed from the sheet material carry-in side. FIG. 4 is a cross section of a plane including the axis of the drive shaft 1 and the axis of the screw shaft 2, in which a part of the cutting device is omitted and the main part is viewed from the sheet material carry-in side. FIG. 5 is a cross section of a plane perpendicular to the axis of the drive shaft 1 in the vicinity of the contact point (engagement point) between the drive round blade 7 and the driven round blade 9, and a part of the cutting device is omitted, and the main part is shown in FIG. It is the figure seen from the left side of the inside drive shaft 1. FIG. FIG. 6 is a diagram in which a part of the cutting device is omitted and the main part is viewed from the left oblique side on the sheet material carry-out side. FIG. 7 is a diagram in which a part of the cutting device is omitted and the main part is viewed from the right oblique side on the sheet material carry-out side. FIG. 8 is a diagram showing a configuration on the right side of the drive shaft 1 omitted in FIG.

The cutting device is a drive that moves the cutting portion A that cuts the sheet material, the drive round blade 7, the driven round blade 9, the slide base 6 and the like in the axial direction of the drive shaft 1 (hereinafter referred to as "drive shaft direction"). The circular blade moving part B and the driven circular blade swing for suppressing the swing of the drive shaft 1 such as the drive circular blade 7, the driven circular blade 9 and the slide base 6 ( hereinafter referred to as "around the drive shaft" ) . The restraining part C, the preloading part D for urging the slide base 6 in one direction in the drive axis direction, the main body frame 4 composed of the side plates 4a and 4b, the bottom plate 4c and the upper plate 4d, and the drive shaft 1 are arranged in parallel. And a plurality of guide rollers 3 for guiding the loading and unloading of the sheet material.

  The cutting part A has a pair of driving round blades 7 and driven round blades 9 which are configured to be movable in the driving axis direction by the driving round blade moving part B, and contact points (meshing) formed at the outer edges of each other. The sheet material can be cut by inserting the sheet material at point).

  The drive round blade 7 is attached to the holder 15 and attached to the drive shaft 1 through the holder 15. Further, the drive round blade 7 is prevented from rotating with the drive shaft 1 by the D cut surface 10 provided on the drive shaft 1, and can be rotated by the rotation of the drive shaft 1.

  The driven round blade 9 is attached to the driven shaft 5 and is urged against the driving round blade 7 by a coil spring 16 provided in the axial direction of the driven shaft 5. The driven shaft 5 is supported by two surfaces (driven shaft holding surface 6 a and driven shaft preload surface 6 c) provided on the slide base 6 through bearings at both ends, and the driven round blade 7 rotates to drive the driven circle 5. The blade 9 is configured to freely rotate.

  Both ends of the drive shaft 1 are rotatably supported by two side plates 4a and 4b of the main body frame 4 via bearings. A gear 17 is attached to one end side of the drive shaft 1. Since the gear 17 is connected to a drive source (not shown) via a gear 17c, when the gear 17 rotates, a driving force is transmitted to the gear 17a connected to the gear 17 and further to the gear 17b. can do. A guide roller 3 is attached to the gear 17b.

  The drive round blade moving part B has a function of moving the cutting part A having the drive round blade 7 and the driven round blade 9 in the drive axis direction and positioning the drive round blade 7 in the drive axis direction. Further, the driving round blade moving part B includes a screw shaft 2, a nut 12 that meshes with the screw shaft 2, a preloading part D that preloads the nut 12, and a slide base 6.

  Both ends of the screw shaft 2 are rotatably supported by two side plates 4 a and 4 b of the main body frame 4 via bearings, and are arranged in parallel with the drive shaft 1. Further, one side (side plate 4b side) of the screw shaft 2 is connected to a drive source via a gear 18, and the screw shaft 2 can be rotated by the drive source. Both ends of the nut 12 are attached to the shaft holding surface 6b and the shaft support surface 6d of the slide base 6. In addition, since the screw portion where the screw shaft 2 and the nut 12 mesh with each other has a larger clearance than the conventional ball screw mechanism that can be said to have substantially no clearance, by rotating the screw shaft 2, The nut 12 can be moved in the axial direction of the screw shaft 2 (hereinafter referred to as “screw shaft direction”) smoothly with a relatively light load.

  The slide base 6 includes a driven shaft holding surface 6a and a driven shaft preloading surface 6c for supporting both ends of the driven shaft 5, a shaft holding surface 6b provided with a locking portion 6e related to the preloading portion D, and the drive shaft 1. It has a shaft support surface 6d to which a bearing to be supported is attached and a bottom surface 6f related to the driven round blade swing suppressing portion C. The slide base 6 is configured to be engaged with the drive round blade 7 while holding the both ends of the holder 15 to which the drive round blade 7 is attached.

  The preload portion D has a coil spring 16 and biases the nut 12 in one direction of the screw shaft direction to preload the screw portion, thereby limiting the clearance in the screw shaft direction of the screw portion, and the engagement state of the screw portion. Has a smooth function. One end of the coil spring 16 is engaged with a locking portion 6 e of a shaft holding surface 6 b provided on the slide base 6, and the other end side is engaged with a locking portion 4 c ′ provided on the bottom plate 4 c of the main body frame 4. The nut 12 is urged by an elastic force. By such urging of the nut 12, the slide base 6 to which the nut 12 is attached can be pressed against one of the screw shaft directions and one of the drive shaft directions arranged in parallel with the screw shaft 2.

  The driven round blade swing suppressing portion C includes an extending portion 13 that extends in the screw axis direction, a holding portion 14 that is configured to be movable in the screw axis direction while holding a part of the extending portion 13. The extending portion 13 is attached to the main body frame 4. The clamping part 14 has a pair of rollers 11 that clamp the extension part 13, and is attached to the bottom surface 6 f of the slide base 6 to which the nut 12 is attached. Further, when the slide base 6 moves in the screw shaft direction along with the movement of the nut 12 due to the rotation of the screw shaft 2, the clamping portion 14 attached to the slide base 6 is part of the extension portion 13 by the pair of rollers 11. It moves in the direction of the screw shaft while pinching.

  With the configuration described above, even if the slide base 6 tries to swing around the axis of the drive shaft 1 due to the clearance between the screw shaft 2 and the nut 12, the driven circular blade swing suppressing portion C suppresses the swing. can do. Therefore, it is possible to prevent the driven shaft 5 supported by the slide base 6 in which the swing is suppressed and the driven round blade 9 attached to the driven shaft 5 from swinging around the drive shaft. it can.

Next, positioning of the cutting point of the sheet material in the driving axis direction, that is, positioning of the contact point (engagement point) between the driving round blade 7 and the driven round blade 9 will be described.
In the drive round blade moving part B having the above-described configuration, when the screw shaft 2 rotates in one direction via the gear 18 connected to the drive source, the nut 12 corresponds to the direction of rotation of the screw shaft 2 in the screw shaft direction. Move to one of the By moving the nut 12, the slide base 6 to which the nut 12 is attached can be moved to one side in the screw shaft direction. Further, when the direction of rotation of the screw shaft 2 is changed to the other, the movement direction of the nut 12 is changed to the other, so that the movement direction of the slide base 6 can be changed to the other of the screw shaft directions. Since the drive shaft 1 and the screw shaft 2 are arranged in parallel, the drive shaft direction and the screw shaft direction are the same.

  With this configuration, the slide base 6 can be moved to one or the other in the drive shaft direction via the nut 12 by the rotation of the screw shaft 2, so that the drive round blade that engages the slide base 6 via the holder 15. 7 and the driven round blade 9 attached to the driven shaft 5 supported by the slide base 6 can be simultaneously moved to one or the other in the drive shaft direction. In this movement, the driving round blade 7 and the driven round blade 9 can be moved at the same time, so that the contact point (engagement point) for cutting the sheet material is maintained. Therefore, the rotation amount and direction of the screw shaft 2 are controlled, and the slide base 6 is stopped at a desired position in the drive shaft direction, so that the position of the cutting point of the sheet material, that is, the drive round blade 7 and the driven round blade 9 are obtained. The position of the contact point (engagement point) can be moved to a desired position in the drive shaft direction and positioned.

  Further, the slide base 6 urged to one side in the screw shaft direction by the preload portion D is suppressed from fine movement in the screw shaft direction. For this reason, when the slide base 6 is moved and stopped, even if the slide base 6 tries to finely move in the direction of the drive screw shaft (drive shaft direction) due to the clearance between the screw shaft 2 and the nut 12, Can be suppressed. Therefore, the fine movement of the slide base 6 in the drive axis direction is suppressed, and the slide base 6 can be positioned with high accuracy in the drive axis direction. Therefore, the cutting point of the sheet material, that is, the contact point between the drive round blade 7 and the driven round blade 9 ( The meshing point) can be positioned with high accuracy in the drive shaft direction.

Next, positioning of the contact point (engagement point) between the drive round blade 7 and the driven round blade 9 around the drive shaft will be described.
In the driven round blade swing suppressing portion C having the above-described configuration, when the screw shaft 2 rotates via the gear 18 connected to the drive source, the nut 12 moves in the screw shaft direction, and the slide base 6 moves in the screw shaft direction. Moving. Due to the movement of the slide base 6 in the screw axis direction, the clamping part 14 of the driven round blade swing suppressing part C moves in the screw axis direction while a part of the extending part 13 is held between the pair of rollers 11.

  At this time, since the extending portion 13 is attached to the main body frame 4, it does not swing around the drive shaft. In addition, the sandwiching portion 14 that sandwiches a part of the extending portion 13 that does not swing around the drive shaft by the pair of rollers 11 also does not swing around the drive shaft. Further, the slide base 6 in which the pair of rollers 11 of the holding portion 14 that does not swing around the drive shaft is attached to the bottom surface 6f also does not swing around the drive shaft. Therefore, the driven round blade swing suppressing portion C having the extending portion 13 and the clamping portion 14 described above suppresses the swing of the slide base 6 around the drive shaft, and the slide base 6 can be positioned with high accuracy around the drive shaft. Therefore, the cutting point of the sheet material, that is, the contact point (engagement point) between the driving round blade 7 and the driven round blade 9 can be positioned with high accuracy around the driving shaft.

  Using the cutting device having the above-described configuration, the sheet material can be cut by arbitrarily selecting a cutting position in the drive axis direction of the cutting device, that is, in the width direction of the sheet material. Specifically, for example, when a sheet material (not shown) conveyed by a conveying device (not shown) reaches a predetermined position, the drive shaft 1 is driven and rotated in a predetermined direction. The drive round blade 7 is rotated by the rotation of the drive shaft 1, and the driven round blade 9 is simultaneously rotated by the rotation of the drive round blade 7. At the same time, the guide rollers 3 on the carry-in side and the carry-out side are rotated to enter a standby state in which the cutting device can be cut.

  When the conveyed sheet material is guided to at least one set of guide rollers 3 on the carry-in side rotating in the standby state, the sheet material is sandwiched between the guide rollers 3 on the carry-in side, and the cutting portion A It is conveyed to the side. When the sheet material reaches the contact point (engagement point) between the driving round blade 7 and the driven round blade 9, the sheet material is cut at the contact point while being conveyed. Thereafter, when the cut sheet material (product) further conveyed is guided by the pair of carry-out guide rollers 3 rotating in the standby state, it is sandwiched between the carry-out guide rollers 3. And carried out of the cutting device. On the other hand, the cut piece of the cut sheet material is discharged along the waste discharge port 8 to the outside of the cutting device. Such a series of cutting processes can be performed continuously while separating the sheet material into products and chips according to the length of the sheet material.

A. Cutting part, B. Drive round blade moving part, C.I. Driven round blade swing restraint part, D.E. Preload section, 1. Drive shaft, 2. Screw shaft, 3. Guide roller, 4. Body frame, 4a. Side plate, 4b. Side plate, 4c. Bottom plate, 4c '. Locking part, 4d. 4. Upper plate, Driven shaft, 6. Slide base, 6a. Driven shaft holding surface, 6b. Shaft holding surface, 6c. Driven shaft preload surface, 6d. Shaft support surface, 6e. Locking part, 6f. Bottom, 7. Drive round blade, 8. 8. Waste outlet, Driven round blade, 10. D-cut surface, 11. Roller, 12. Nuts, 13. Extension part, 14. 15. clamping part; Holder, 16. Coil spring, 17. Gear, 17a. Gear, 17b. Gear, 17c. Gear, 18. gear

Claims (3)

A drive round blade configured to be rotated by the rotation of the drive shaft and movable in the axial direction of the drive shaft by the drive round blade moving portion, and a counter-rotation and driven by the rotation of the drive round blade attached to the driven shaft A driven round blade in which swinging around the axis of the drive shaft is suppressed by a round blade swing suppressing portion;
The drive round blade moving unit includes a screw shaft rotatably supported by a main body frame, a nut that moves in the axial direction of the screw shaft by rotation of the screw shaft, and one of the nuts in the axial direction of the screw shaft. A preload portion for preloading, and a slide base to which the nut is attached and engaged with the driving round blade and rotatably supporting the driven shaft,
The driven round blade swing suppressing portion is attached to the main body frame and includes an extension portion including a flat plate extending in the axial direction of the screw shaft, and is attached to the slide base and sandwiches the flat plate of the extension portion. The sheet | seat material cutting device which has a clamping part provided with a pair of roller comprised by the axial direction of the said screw shaft so that rolling was possible. The slide base includes a bearing, the drive shaft communicates with the bearing, and is configured to be movable in the axial direction of the drive shaft and swingable around the shaft by the drive shaft. sheet material cutting apparatus according to 1. The slide base has a first sliding base comprising a structure for attaching the nut, said is constituted by a combination of a second slide base comprising a structure for supporting the driven shaft, a sheet material according to claim 1 or 2 Cutting device.