JP5398066B2 - Sheet material cutting device - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material cutting apparatus that is used by being mounted on a printing recording apparatus such as a register, a ticket vending machine, a thermal printer, or a label printer. .

  2. Description of the Related Art Conventionally, a sheet material cutting apparatus that performs cross pressure welding with a shearing angle on a plate-shaped movable blade to a fixed blade extended in the cutting width direction and moves the pressure contact formed by the cross pressure welding in the cutting width direction. Is known that generally employs the cutting means shown in FIG.

  The cutting means shown in FIG. 4 (a) uses a movable blade 50a having a cutting edge line extending so as to incline from one to the other in the cutting width direction, and this movable blade 50a is indicated by an arrow 52. The sheet material S is substantially translated from a substantially vertical direction with respect to the sheet surface. By the moving operation of the movable blade 50a, the pressure contact formed between the movable blade 50a (hereinafter referred to as a guillotine blade) and the fixed blade 51a is moved from one end to the other end in the cutting width direction. S can be cut. In the cutting means using such a guillotine blade, the shear angle formed by the cutting edge lines of the guillotine blade and the fixed blade is kept constant throughout the cutting.

  Moreover, the cutting means shown in FIG.4 (b) is proposed by patent document 1, for example, The movable blade which has the blade edge line | wire formed so that it may incline in V shape toward the center from the both ends of a cutting | disconnection width direction 50b is used. The movable blade 50b is substantially translated from a substantially vertical direction with respect to the sheet surface of the sheet material S as indicated by an arrow 52, which is the same as the above-described guillotine blade. Due to the moving operation of the movable blade 50b, the pressure contact formed between the movable blade 50b (hereinafter referred to as a V-shaped blade) and the fixed blade 51b is moved from both ends in the cutting width direction toward the center. The sheet material S can be cut. In the cutting means using such a V-shaped blade, the shear angle formed by the cutting edge lines of the V-shaped blade and the fixed blade is maintained at a constant angle throughout the cutting. This is the same as the above-mentioned guillotine blade.

  The cutting means shown in FIG. 4 (c) is proposed in, for example, Patent Document 2, and uses a movable blade 50c having a cutting edge line extending so as to incline from one to the other in the cutting width direction. Is the same as the above guillotine blade. However, the movable blade 50c is pivotally supported by the support shaft 53 on the cutting start side, and is swung like scissors around the support shaft 53 as indicated by an arrow 54. By the movement operation of the movable blade 50c, the pressure contact formed between the movable blade 50c (hereinafter referred to as scissors-like blade) and the fixed blade 51c is moved from one end to the other end in the cutting width direction. The material S can be cut. In such cutting means using scissors-like blades, unlike the above-mentioned guillotine blades and V-shaped blades, the shear angle formed by the cutting edge lines of the scissors-like blades and the fixed blades is one end on the cutting start side. Becomes the maximum, the other end on the cutting end side becomes the minimum, and the angle becomes smaller as the cutting progresses.

  In recent years, in addition to further downsizing and weight reduction of sheet material cutting devices using the above-described cutting means, energy saving and high efficiency in consideration of environmental problems have been desired. For example, there is a demand for a sheet material cutting device that can cut a thick sheet material of 150 to 300 μm, which is often used for labels and seals, while suppressing an increase in cutting load.

JP 09-155788 A JP 2008-30198 A

In the sheet material cutting device, when the above-described guillotine blade or V-shaped blade is used as the movable blade, it is effective to set a larger shear angle in order to reduce the cutting load.
However, with a guillotine blade, the inclination angle of the cutting edge line increases when trying to obtain a large shear angle, so the cutting direction dimension of the movable blade and the amount of movement required for cutting increase, and the sheet material cutting device can be made more compact. It will hinder weight reduction.
Further, in the V-shaped blade, the amount of movement required for cutting can be reduced by about half compared to a guillotine blade having the same shear angle, but the cutting load increases by about twice.

  In addition, when the scissors-like blade described above is used as the movable blade, considering that the shear angle gradually decreases toward the end of cutting, the cutting load is applied by cutting up to the middle of the cutting edge line having a large shear angle. Thick sheet material can be cut without increasing. However, since not only the cutting direction of the movable blade but also the dimension in the cutting width direction becomes large, the sheet material cutting device is hindered from being made compact and lightweight.

  An object of the present invention is to provide a sheet material cutting device having a simple configuration that can cut a thick sheet material such as a label or a seal while suppressing an increase in cutting load.

  The present inventor has found that the above-mentioned problems can be solved by the cutting means for cutting the sheet material by moving the movable blade in the cutting end side direction, and has arrived at the present invention.

That is, according to the present invention, a plate-shaped movable blade is cross-welded with a shear angle to a fixed blade extended in the cutting width direction, and the pressure contact formed by the cross-welding is moved in the cutting width direction for cutting. The sheet material cutting device, wherein the movable blade has a force point on the cutting start side and a fulcrum on the cutting end side, and starts turning by turning the movable blade around the fulcrum by the turning operation of the force point, It is a sheet material cutting device which finishes cutting by performing shift operation which makes the position of the fulcrum movable from the middle of the turning operation and moves the movable blade in the cutting end direction in the cutting width direction .

  In the present invention, it is desirable that the position of the power point be movable so as to suppress the displacement of the movable blade in the direction opposite to the cutting progress direction in the turning operation.

  In the present invention, the fulcrum can be formed at a position where a shaft member provided in the movable blade support member engages with a shaft member engagement hole provided in the movable blade.

  In the present invention, the power point is formed at a position where a drive pin provided at a predetermined distance from a rotating shaft of a rotating rotor engages with a drive pin engaging hole provided in the movable blade. be able to.

  In the present invention, it is desirable that the movable blade is in cross pressure contact with the fixed blade by its own torsional deformation during cutting.

  In the present invention, it is desirable that the movable blade has a magnet for assisting the pressure contact with the fixed blade.

  Moreover, in this invention, it is desirable to have the inclination part of the direction which makes a shear angle large in the cutting start side of the blade edge line of the said movable blade.

  Moreover, in this invention, it is desirable to have the curvature part of the direction which press-contacts to the said fixed blade in the cutting end side of the blade edge line of the said movable blade.

  Moreover, in this invention, it is desirable to have a hardness difference between a movable blade edge and a fixed blade edge.

  The sheet material cutting device of the present invention can cut thick sheet materials such as labels and seals while suppressing an increase in cutting load. Moreover, the sheet material cutting device of the present invention has a simple configuration, and does not impair the compactness and light weight of the sheet material cutting device itself, and can contribute to cost reduction.

It is a block diagram which shows an example of the sheet | seat material cutting device of this invention. It is a schematic diagram which shows the cutting operation process in the sheet | seat material cutting device shown in FIG. It is a schematic diagram which shows the cutting operation | movement process in an example of the sheet material cutting device of this invention from which the structure which concerns on the power point and fulcrum of a movable blade differs from the sheet material cutting device shown in FIG. It is a schematic diagram which shows the example of a cutting means used for the conventional sheet | seat material cutting device. It is a block diagram which shows an example of the sheet | seat material cutting device of this invention which has a curvature part in the cutting end side of a movable blade. It is sectional drawing which shows typically the deformation | transformation process of the movable blade in the cutting | disconnection operation | movement by the sheet | seat material cutting device shown in FIG. It is a schematic diagram which shows the cross press-contact state of a movable blade and a fixed blade in the state approximated to the cutting start shown in FIG.6 (b).

An important feature of the present invention is the cutting operation of the movable blade that cuts the sheet material by cross-contacting with the fixed blade. Specifically, the cutting operation is performed such that the movable blade starts to be turned by turning and is moved to the cutting end side in the cutting width direction from the middle of the turning operation to finish the cutting. That is, the sheet material cutting device of the present invention starts cutting by the turning operation of the movable blade, and performs the cutting operation so as to cut the sheet material by shifting the movable blade in the direction of the end of the cutting from the middle of the turning operation. Is what you do.

  In the cutting operation described above, a large shear angle corresponding to the inclination of the cutting edge line can be formed by largely inclining the cutting edge line of the movable blade by the turning operation of the movable blade. Further, the sheet material can be cut from the middle of the turning operation, that is, from the middle of the cutting, by the shift operation toward the cutting end side direction of the movable blade. In addition, the cutting method in which the cutting is dominant has a considerable effect as if the shear angle is increased as compared with the cutting method in which the shearing force is dominant, which may improve the cutting performance. Are known.

  Therefore, the shifting operation of the movable blade from the middle of cutting is particularly important. By shifting the movable blade, the shear angle that greatly affects the cutting performance can be kept almost constant, Since the sheet material can be cut by the cutting edge of the movable blade while suppressing a large change in the shear angle formed by the turning operation, the cutting load when the sheet material is cut can be reduced.

  Therefore, according to the present invention in which the movable blade is cut as described above, a large shear angle is obtained by the swiveling operation of the movable blade, and the apparent shear angle by pulling while maintaining the obtained large shear angle. By obtaining a considerable effect of increase, it is possible to obtain a sheet material cutting device in which the cutting load when cutting the sheet material is reduced.

  In addition, an important feature of the apparatus configuration in the present invention is to provide a force point formed so as to be pivotable on the cutting start side of the movable blade in order to cause the plate-shaped movable blade to perform the above-described cutting operation in the present invention. In addition, a configuration in which a fulcrum formed so that the position of the movable blade can be moved from the middle of the turning operation of the movable blade is provided on the cutting end side of the movable blade so that the movable blade can be moved relative to the fixed blade. That is. By configuring the force point and the fulcrum as described above in the positional relationship with the movable blade, the cutting operation of the movable blade in the present invention described above can be obtained. And the position of the movable blade with respect to a fixed blade can be suitably moved according to progress of cutting.

  In the present invention, in order to easily configure the power point and the fulcrum, it is desirable to apply a mechanical structure combining a shaft and a hole. For example, a fixed shaft is provided on the movable blade side, and a hole or groove through which the fixed shaft can be communicated is provided on the movable blade holding member side such as a frame or guide, or conversely, for example, a fixed shaft is provided on the movable blade holding member side. Provided with a hole or groove through which the fixed shaft can be communicated, and the movable shaft can be moved relative to the movable blade holding member by allowing the fixed shaft to move within the hole or groove. Thus, the movable blade can be configured to be movable relative to the fixed blade.

  In addition, in the present invention, it is also important that the lever mechanism can be formed. Specifically, in the cutting operation, when the pressure contact formed by the movable blade cross-contacting with the fixed blade is located between the force point and the fulcrum, the pressure contact becomes the action point, A lever mechanism known as a so-called second-type lever is formed in which the action point is located between the force point and the fulcrum. Therefore, according to the present invention in which the lever mechanism can also be used, a sheet material cutting device having a larger cutting load can be obtained.

As described above, the sheet material cutting device of the present invention is energy-saving and highly efficient, such as a reduction in cutting load due to a large shear angle, a reduction in cutting load due to drawing, and an increase in cutting load due to the application of an insulator. Further, it is possible to cut a thick sheet material such as a label or a seal while suppressing an increase in cutting load.
In addition, the sheet material cutting device of the present invention has a simple configuration to which the lever mechanism is applied. Therefore, the cutting device itself can be made compact and lightweight, and in addition, it can contribute to cost reduction.

Next, an example is given about the sheet | seat material cutting device of this invention, and it demonstrates in detail using drawing.
FIG. 1 is a configuration diagram illustrating an example of a sheet material cutting device 1 (hereinafter referred to as a cutting device 1) of the present invention. The cutting device 1 includes a movable blade 2 and a frame 4 serving as a movable blade support member, a fixed blade 3 and a frame 5 on which the fixed blade 3 is fixed, a drive pin 6 constituting a movable blade drive mechanism, a rotor 7, a gear 8, and a motor. 9 and a member such as a spring 11 for assisting the movement of the movable blade 2 in the cutting start side direction.

  The movable blade 2 is formed in a plate shape and is arranged so that the cutting width direction is the longitudinal direction. On the cutting start side of the cutting edge line of the movable blade 2, there is an inclined portion 2d in the direction of increasing the shear angle. The movable blade 2 has a guide portion 2 c that guides the meshing with the fixed blade 3 at the end in the cutting direction on the cutting start side.

  On the other hand, the fixed blade 3 has a plate shape and is formed by extending in the cutting width direction. And the guide part 2c of the movable blade 2 in the standby position before the cutting start shown in FIG. The movable blade 2 and the fixed blade 3 are pressed against each other by placing the movable blade 2 and the fixed blade 3 in such a positional relationship that the movable blade 2 slightly rides on and engages the fixed blade 3. This is performed by utilizing the pressing force applied to the fixed blade 3 caused by the blade 2 riding on. When the movable blade 2 rides on the fixed blade 3, the cutting edge line of the movable blade 2 intersects the cutting edge line of the fixed blade 3. A pressure contact can be formed in a state.

  In addition, the cutting device 1 is configured such that the magnet 12 is disposed near the center of the plate surface of the movable blade 2 and the movable blade 2 is sandwiched between the magnet 12 and the frame 4. Thus, the magnetic force attracted by the magnet 12 and the frame 4 is used to press the movable blade 2 against the fixed blade 3 so that the pressure contact between the blade edges is assisted.

  The movable blade drive mechanism includes a drive pin 6 that engages the movable blade 2, a rotor 7 that has the drive pin 6 provided at a predetermined distance from the rotation axis, a gear 8 that is connected to the rotor 7, and the gear 8. A motor 9 is mounted on the rotating shaft. With this configuration, the motor 9 can be rotated in one direction to rotate the drive pin 6 provided on the rotor 7, and the movable blade 2 can be turned by the rotation of the drive pin 6. In this configuration, in the present invention, the drive pin 6 provided at a predetermined distance from the rotating shaft of the rotating rotor 7 and the drive pin engagement hole 2a provided in the movable blade 2 are engaged with each other. A force point can be formed.

  The movable blade 2 described above has the drive pin engagement hole 2a described above on the cutting start side. The drive pin engaging hole 2a is formed in a long hole shape in which the extending direction of the hole is substantially along the cutting width direction and is bent slightly toward the cutting direction. The drive pin 6 communicates with and engages with the drive pin engagement hole 2a, and the communicated drive pin 6 is movable within the drive pin engagement hole 2a. Further, by using a configuration in which the drive pin 6 described above is combined with the drive pin engagement hole 2a having the shape as described above, in the turning operation of the movable blade, for example, as shown in FIG. The position of the force point can be moved so as to suppress the displacement of the movable blade in the opposite direction. Such suppression of the displacement of the movable blade will be described later with reference to FIGS. 2 and 3.

  In the cutting operation, the driving pin 6 having the above-described configuration can be pressed against the end surface of the driving pin engaging hole 2a on the outer peripheral surface of the driving pin 6, and this pressing point can be used as a force point of the lever. The shape of the drive pin engaging hole 2a may be any shape as long as the drive pin 6 can be pivotally supported in the drive pin engaging hole 2a and the movable blade 2 can be pivoted. 3 may be a circular shape that can be fitted to the outer peripheral shape of the drive pin 6 as shown in FIG.

  Moreover, the movable blade 2 mentioned above has the shaft member engaging hole 2b in the cutting end side. The shaft member engagement hole 2b is formed in a long hole shape having a curve such that the extending direction of the hole is directed to the cutting direction and the cutting end direction. The shaft member 10 provided in the frame 4 is communicated with and engaged with the shaft member engaging hole 2b, and the communicated shaft member 10 is movable in the shaft member engaging hole 2b. Yes. In this configuration, a fulcrum in the present invention is formed at a position where the shaft member 10 provided in the frame 4 serving as the movable blade support member engages with the shaft member engagement hole 2b provided in the movable blade 2. Can do. In addition, since the shaft member 10 can abut on the end surface of the shaft member engagement hole 2b on the outer peripheral surface of the shaft member 10 in the cutting operation, this abutment point can act as a fulcrum of the lever.

Next, the cutting operation of the sheet material cutting device of the present invention will be described using the cutting device 1 shown in FIG.
In the cutting device 1, the movable blade 2 is driven by a rotational force of a force point constituted by the drive pin 6 and the drive pin engaging hole 2 a, that is, the fulcrum of the lever, that is, the outer peripheral surface of the shaft member 10 and the end surface of the shaft member engaging hole 2 b. 2 starts to cut the sheet material shown as the pass line P in FIG. 2, the position of the fulcrum is moved from the middle of the turning operation, and the sheet material is shifted toward the cutting end side direction. Can be cut completely.

Hereinafter, the cutting operation in the cutting apparatus 1 will be described in detail with reference to FIG.
2 (a) to 2 (e) show the case where the rotational angle of the drive pin 6 for cutting the movable blade 2 is 0, 90, 180, 225, and 270 degrees. It is a schematic diagram which shows each of these states typically. In FIG. 2, in order to clarify the cutting operation of the movable blade 2, the configuration of the other members and the apparatus excluding the external shape of the movable blade 2 is shown in a simplified manner. P corresponds to the pass line of the sheet material.

  In the cutting device 1, the movable blade 2 is movable from the standby position shown in FIG. 2A until it returns to the standby position again through FIGS. 2B to 2E, that is, while the drive pin 6 makes one rotation. The power point of the blade 2 is swiveled. The movable blade 2 is turned around the fulcrum by the turning operation of the power point. Further, during the turning operation of the power point, the cutting operation that enables the sheet material to be cut, that is, the shifting operation of the movable blade 2 in the cutting width direction is performed during the period shown in FIGS. 2 (c) to 2 (e). Done.

  More specifically, when the driving pin 6 is rotated to rotate the power point from the standby state where the rotation angle of the driving pin 6 shown in FIG. 2A is 0 degree, the turning of the movable blade 2 is started. The cutting operation is started. In the course of the turning operation of the power point until the rotation angle of the drive pin 6 reaches 90 degrees as shown in FIG. 2B, the cutting edge line of the movable blade 2 has a shear angle with respect to the cutting edge line of the fixed blade 3. Cross welded. Cutting of the sheet material is started by moving the pressure contact 15 formed by the cross pressure welding with the blade edges to the cutting end side in the cutting width direction.

  After that, when the drive pin 6 further rotates and the power point turns, the movable blade 2 is further turned. As a result, the pressure contact 15 is further moved toward the end of cutting and the cutting of the sheet material is continued. The Eventually, the rotation angle of the drive pin 6 shown in FIG. 2C reaches a state of 180 degrees, and the movable blade 2 reaches the bottom dead center position in the cutting direction.

  In the cutting operation so far, on the cutting start side of the movable blade 2, the movable pin 2 is swung by moving the driving pin 6 in the driving pin engaging hole 2a and swiveling the power point. 2 is moved in the cutting direction and the cutting width direction. On the other hand, in the cutting device 1, the shaft member 10 does not move in the shaft member engagement hole 2 b on the cutting end side of the movable blade 2. That is, the fulcrum on the cutting end side of the movable blade 2 has not moved. In the cutting operation so far, the fulcrum does not have to be formed so as not to move, and the movable blade 2 reaches the bottom dead center position in the cutting direction in order to form a larger shear angle on the cutting start side. It is desirable to make the fulcrum impossible to move.

  Then, after the movable blade 2 reaches the bottom dead center position in the cutting direction, the power point is further swung by the further rotation of the drive pin 6. At this time, a shift operation in the cutting width direction of the movable blade 2 is performed from the middle of the turning operation of the power point so as to correspond to the rotation angle of the drive pin 6, and the fulcrum moves, for example, as shown in FIG. Thus, the movable blade 2 is moved in the cutting end side direction in the cutting width direction. By the shifting operation of the movable blade 2, the sheet material can be cut at the cutting edge of the movable blade 2 while maintaining a large shear angle formed when the movable blade 2 reaches the bottom dead center position.

  Further, thereafter, the movable blade 2 is moved to the position shown in FIG. 2E, and the cutting of the sheet material is completed. Finally, the movable blade 2 is returned to the standby position shown in FIG. 2A, and a series of cutting operations are completed.

  In the shifting operation of the movable blade 2 in the cutting device 1 described above, the driving force applied from the drive pin 6 to the movable blade 2 at the power point is divided into a cutting direction and a cutting width direction at the fulcrum. The divided cutting width direction component force becomes a driving force for shifting the movable blade 2 in the cutting width direction. Therefore, since the ratio of the cutting direction component force and the cutting width direction component force is determined by the moving direction of the fulcrum, the rotational movement of the force point is performed so that the movement of the movable blade 2 is substantially limited to the cutting width direction. It is desirable to have the shaft member engagement hole 10 formed with a hole shape so that the fulcrum can be moved correspondingly.

  Next, the cutting operation according to another example using the movable blade 2 ′ having a configuration related to the power point and fulcrum of the movable blade different from that of the above-described cutting device 1 shown in FIG. 1 will be additionally described. The configuration of the cutting device using the movable blade 2 ′ may be the same as that of the cutting device 1 except for the configuration related to the power point and fulcrum of the movable blade.

  3A to 3E, in the rotational movement of the drive pin 6 for cutting the movable blade 2 ′, the rotation angles become 0 degrees, 90 degrees, 180 degrees, 225 degrees, and 270 degrees. It is a schematic diagram which shows typically each state of a case. Note that the movable blade 2 'of the cutting device shown in FIG. 3 changes only the configuration of the power point and the fulcrum of the movable blade 2 of the cutting device 1 shown in FIG. Specifically, the hole shapes of the drive pin engagement hole 2a 'and the shaft member engagement hole 2b' are different. Similarly to FIG. 2, FIG. 3 also shows a simplified configuration of other members and apparatuses except for the external shape of the movable blade 2 ′ in order to clarify the cutting operation of the movable blade 2 ′. P corresponds to the pass line of the sheet material.

  In the cutting operation of the movable blade 2 ′ in the cutting device shown in FIG. 3, the difference clearly from the movement of the movable blade 2 in the cutting operation of the cutting device 1 described above is the amount of movement of the movable blade 2 ′ in the cutting width direction. . In the movable blade 2 ′, since the drive pin 6 is fitted and pivotally supported in the drive pin engagement hole 2a ′, that is, the position of the force point is not moved, the drive pin 6 is rotated when the drive pin 6 rotates. Cannot move to the extent that the position of the force point changes in the drive pin engagement hole 2a ′. Therefore, when the drive pin 6 rotates from the standby state shown in FIG. 3A to the position shown in FIG. 3B, the movable blade 2 ′ is a distance corresponding to the rotation radius of the drive pin 6 in the cutting width direction. It will be moved in the direction of the start side only.

  After that, the movable blade 2 ′ reaches the bottom dead center position shown in FIG. 3C, and further passes through the state shown in FIG. And is moved to the position shown in FIG. At this time, the moving amount of the movable blade 2 ′ in the cutting width direction in the cutting end side direction is maximized and is moved by a distance corresponding to the rotational radius of the drive pin 6.

  As described above, even the cutting apparatus having the movable blade 2 ′ shown in FIG. 3 can cut the sheet material by the above-described cutting operation in the present invention. However, in the configuration in which the drive pin 6 is pivotally supported so as to substantially fix the position of the power point as in the movable blade 2 ′, the amount of movement of the movable blade in the cutting width direction corresponds to the rotational diameter of the rotational motion of the power point. It becomes the amount of movement.

  On the other hand, the configuration in which the drive pin 6 is pivotally supported so that the position of the force point can be moved like the movable blade 2 shown in FIG. 2 is a distance in which the moving amount of the movable blade in the cutting width direction corresponds to the moving amount of the force point. The amount of movement is reduced by an amount corresponding to the rotational diameter of the rotational movement of the power point. Therefore, the shift operation of the movable blade can be suppressed when the movable blade is in a position where the contribution to cutting is low. In addition, since the amount of movement of the movable blade in the cutting width direction is suppressed, it is advantageous for making the sheet material cutting device compact. In this regard, the position of the power point can be moved so as to suppress the displacement of the movable blade in the direction opposite to the cutting progress direction. For example, the configuration of the power point and the cutting operation of the movable blade 2 as shown in FIG. It is advantageous that the drive pin 6 is supported so as to be movable in the drive pin engaging hole 2a, and the position of the force point is preferably movable.

Next, the cross pressure welding of the movable blade to the fixed blade in the sheet material cutting device of the present invention will be described with reference to the drawings.
5 is a sheet material cutting device 100 (hereinafter referred to as a cutting device 100) that is different from the cutting device 1 having the movable blade 2 shown in FIG. 1 and the cutting device having the movable blade 2 ′ shown in FIG. FIG. In this cutting device 100, the movable blade 102 and the fixed blade 103 are configured to be united and separable, and the movable blade 102 does not have a special guide part on the cutting start side (R side shown in FIG. 5), and the cutting end is completed. It is characterized by having a warped portion 102e on the side (L side shown in FIG. 5).

  The cutting device 100 includes a plate-like fixed blade 103 extended in the cutting width direction, a plate-like movable blade 102 disposed so that the cutting width direction is the longitudinal direction, and a frame 104 serving as a movable blade support member. And, it is constituted by members such as a drive pin 106, a rotor 107, a gear 108, a motor 109, and a coil spring 111 for assisting the movement of the movable blade 102 in the cutting start side direction constituting the movable blade driving mechanism. .

  The movable blade 102 has an inclined portion 102d in the direction of increasing the shear angle on the cutting start side of the cutting edge line, and the above-described warped portion 102e on the cutting end side. The warped portion 102e is formed as if it is separated from the main body of the movable blade 102 by a slit, and is formed to have a warp in a direction in pressure contact with the fixed blade 103. Further, the movable blade 102 has a driving pin engaging hole 102a that communicates with the driving pin 106 on the cutting start side to form a force point, and a shaft member engaging hole 102b that communicates with the shaft member 110 on the cutting end side. It has a fulcrum.

  On the other hand, the fixed blade 103 is supported by a fixed blade support member (not shown) that can be configured to be united and separated from the movable blade 102. Note that the configuration relating to the combined separation of the movable blade 102 and the fixed blade 103 is provided with a fixed blade holding member on an apparatus device side such as a printer on which the cutting device 100 is to be mounted, and the fixed blade is fixed to the fixed blade holding member. 103 can be attached. The fixed blade 103 has guide portions 103a and 103b on both ends in the cutting width direction. The guide portion 103a can guide the movable blade 102 so that the movable blade 102 is smoothly pressed against the fixed blade 103 when the movable blade 102 and the fixed blade 103 are combined. Can be guided so as to be engaged with each other.

  Further, when the movable blade 102 returns to the standby position before cutting after the sheet material is cut, the guide portion 103b guides the cutting end side of the cutting edge line 102c of the movable blade 102, and the movable blade with respect to the fixed blade 103 is guided during the guidance. It is possible to maintain the running state of 102 and secure a sheet passing port, and to prevent the sheet material from being caught by the cutting edge line 102c of the movable blade 102. Furthermore, since the guide part 103 can separate the cutting edge of the movable blade 102 from the cutting edge of the fixed blade 103 during the guiding, it is possible to avoid pressure contact between the cutting edges while the movable blade 102 returns to the regular position. That is, the pressure contact between the blade edges can be limited to the forward stroke in which the sheet material is cut by the guide portion 103, and can be avoided in the return stroke after cutting. Therefore, the sliding direction between the cutting edges is limited to the direction in which the cutting edges face each other, and the life of the cutting edges can be further increased. It is improved more than the case where it is pressed.

  The movable blade 102 and the fixed blade 103 described above are arranged so that when the movable blade 102 is cut after being combined with each other, the movable blade 102 rides slightly on the fixed blade 103 and meshes therewith. The The movable blade 102 riding on the fixed blade 103 is pressed against the fixed blade 103 by a reaction force generated by elastic deformation of the movable blade 102 itself. At the same time, the movable blade 102 riding on the fixed blade 103 is torsionally deformed, and the cutting edge line of the movable blade 102 intersects the cutting edge line of the fixed blade 103 by torsional deformation. Therefore, since the movable blade 102 performs a cutting operation and meshes with the fixed blade 103, the movable blade 102 is brought into cross pressure contact with the fixed blade 103, so that a pressure contact for cutting can be formed.

  A state in which the movable blade 102 and the fixed blade 103 are in pressure contact with each other is schematically shown in FIGS. 6A to 6D according to a cutting process. In FIG. 6, in order to clarify the cross pressure welding, the movable blade 102 and the fixed blade 103 are cut from the cross section at the position near the cutting start side indicated by QQ in FIG. 5 (L shown in FIG. 5). (Side direction) and is schematically shown, and a member configuration other than necessary is omitted. FIG. 6A shows a state before the movable blade 102 is engaged with the fixed blade 103, that is, a state before starting cutting. FIG. 6B shows a state in which a sheet material (not shown) has started to be cut, FIG. 6C shows a state in the middle of cutting, and FIG. 6D shows a state near the end of cutting. FIG. 7 is a perspective view schematically showing a state in which a sheet material (not shown) is started to be cut, and approximates the state shown in FIG. 6B in the cutting process.

  The movable blade 102 that has started the cutting operation moves from the standby position before cutting shown in FIG. 6A as indicated by an arrow 120, and is guided by the guide portion 103 a of the fixed blade 103 and rides on the fixed blade 103. Then, the cutting edge lines 102c and 103c of the movable blade 102 and the fixed blade 103 are cross-contacted to form a pressure contact 101 as shown in FIG. 6B. When the movable blade 102 rides on the fixed blade 103 so as to be in the state shown in FIG. 6B, the movable blade 102 itself may be twisted and deformed as shown exaggeratedly in FIG. it can. The torsional deformation of the movable blade 102 causes a relatively large torsional deformation in the vicinity of the inclined portion 102d on the cutting start side, and the cutting edge line 102c of the movable blade 102 is deformed from the fixed blade 103 by the torsional deformation of the movable blade 102 itself. A pressure contact 101 is formed by pressing against the cutting edge line 103c and intersecting at the same time.

  After the formation of the pressure contact 101 on the cutting start side, the movable blade 102 further cuts the sheet material (not shown) while moving as indicated by an arrow 121, and the positional relationship shown in FIG. While the movable blade 102 moves while cutting the sheet material, the pressure contact 101 is moved from the inclined portion 102d to the subsequent position on the cutting edge line 102c of the movable blade 102, but the torsional deformation of the movable blade 102 itself is slight. In addition, since the cross pressure contact state between the movable blade 102 and the fixed blade 103 is maintained while reducing the degree of twisting, the sheet material can be stably cut.

  When the cutting operation of the movable blade 102 further proceeds, the pressure contact 101 moved toward the cutting end side is warped at the cutting end side in the cutting edge line 102c of the movable blade 102 as shown in FIG. Up to 102e. Since the base of the warped part 102e is formed as if it is separated from the movable blade 102 main body, it has a lower mechanical strength than the cutting edge line 102c up to the warped part 102e. Therefore, when the warped portion 102e of the movable blade 102 rides on the fixed blade 103 as described above, the warped portion 102e of the movable blade 102 is deformed in the counter pressure contact direction, that is, torsionally deformed so as to be pushed back to the fixed blade 103. Since the sheet material can be displaced by being bent in the direction to be eliminated, it is possible to maintain an appropriate cross pressure contact state until the cutting end.

  When the movable blade 102 further moves and the cutting edge line 102c in the warped portion 102e is detached from the cutting edge line 103c of the fixed blade 103, the pressure contact 101 is released and the forward stroke of the cutting operation ends. Thereafter, the movable blade 102 returns to the standby position before cutting, and the movable blade 102 is guided and returned to the standby position by the guide portion 103b included in the fixed blade 103 as described above.

  As described above, the cutting device 100 can form a pressure contact during cutting, that is, from the start of cutting to the end of cutting, by moving the movable blade 102 and the fixed blade 103 in cross-pressure contact by torsional deformation. Then, the sheet material can be stably cut by moving the cutting point 101 toward the cutting end side by the movement of the movable blade 102.

  In addition, since the sheet material cutting device of the present invention has a structure in which the movable blade itself is subjected to cross pressure contact using the torsional deformation of the movable blade as described above, it is easy to receive an action as if the blade edges are polished with each other. Guessed. Therefore, in the present invention, it is desirable to provide a hardness difference between the movable blade edge and the fixed blade edge. As a result, when sliding between the blade edges, it is easy to develop a dressing action as if the other blade edge is polished by one of the hardened blade edges, and the blade edges are rubbed together to prevent sharpness deterioration. The dressing effect by can be further improved. In this case, it is desirable to increase the hardness of the movable blade, which is generally expensive because of its complicated shape.

1. Cutting device 2, 2 '. Movable blade, 2a, 2a '. Drive pin engagement holes, 2b, 2b '. Shaft member engagement hole, 2c. Guide part, 2d. 2. inclined part; Fixed blade, 4. Frame, 5. Frame, 6; 6. driving pin; Rotor, 8. Gear, 9. Motor, 10. Shaft member 11, spring 12. Magnet, 15. Pressure contact, 21. Arrows, 50a, 50b, 50c. Movable blades 51a, 51b, 51c. Fixed blade, 52. Arrows, 53. Spindle, 54. Arrow, S.M. Sheet material, P.I. Sheet material pass line, 100. Cutting device 101. Pressure contact, 102. Movable blade, 102a. Drive pin engaging hole, 102b. Shaft member engaging hole, 102c. Cutting edge line, 102d. Sloped portion, 102e. Warpage, 103. Fixed blade, 103a, 103b. Guide section, 103c. Cutting edge line, 104. Frame, 106. Drive pin, 107. Rotor, 108. Gear, 109. Motor, 110. Shaft member, 111. Coil spring, 120, 121. Arrow

Claims (9)

A sheet material cutting device for cutting a plate-like movable blade with a shearing angle against a fixed blade extended in the cutting width direction with a shear angle and moving the pressure contact formed by the cross pressing in the cutting width direction. The movable blade has a power point on the cutting start side and a fulcrum on the cutting end side, and starts turning by turning the movable blade around the fulcrum by the turning operation of the power point. The sheet material cutting device is characterized in that the sheet material cutting device is finished by performing a shift operation to move the movable blade in the direction of the cutting end in the cutting width direction by making the position of the fulcrum movable.   The sheet material cutting device according to claim 1, wherein the position of the power point is movable so as to suppress displacement of the movable blade in a direction opposite to the cutting progress direction in the turning operation.   The said fulcrum is formed in the position which the shaft member provided in the movable blade support member engages with the shaft member engagement hole provided in the said movable blade. Sheet material cutting device.   The force point is formed at a position where a driving pin provided at a predetermined distance from a rotating shaft of a rotating rotor engages with a driving pin engaging hole provided in the movable blade. The sheet | seat material cutting device in any one of Claims 1 thru | or 3.   The sheet material cutting device according to any one of claims 1 to 4, wherein the movable blade is brought into cross pressure contact with the fixed blade by its own torsional deformation in the middle of cutting.   The sheet material cutting device according to any one of claims 1 to 5, wherein the movable blade includes a magnet for assisting pressure contact with the fixed blade.   The sheet material cutting device according to any one of claims 1 to 6, further comprising an inclined portion in a direction in which a shear angle is increased on a cutting start side of a cutting edge line of the movable blade.   The sheet material cutting device according to any one of claims 1 to 7, further comprising a warped portion in a direction in pressure contact with the fixed blade, on a cutting end side of the cutting edge line of the movable blade.   The sheet material cutting device according to any one of claims 1 to 8, wherein there is a difference in hardness between the movable blade edge and the fixed blade edge.