JPH0929687A - Sheet cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet cutter capable of easily and highly accurately setting a positional relationship between a rotary blade and a fixed blade and eliminating the necessity of the operation of inserting a sheet between a guide frame and the fixed blade while controlling the dimensional accuracy and the assembling accuracy of the fixed blade. SOLUTION: A sheet cutter is provided with a guide frame 21 extended along the direction of sheet cutting, a blade base 24 supported in this guide frame 21 so as to be freely moved in its longitudinal direction, a fixed blade 26 attached to the blade base for pressing a sheet P placed in the guide frame from the outside and having a blade along the longitudinal direction of the guide frame, a rotary blade 30 provided in the blade base 24 and rotated along with the movement of the blade base for cutting a sheet together with the fixed blade 26 and a moving device for moving the blade base 24 along the guide frame 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet cutting device for cutting a roll of recording paper in a facsimile machine, for example.

[0002]

2. Description of the Related Art For example, there is a heat-sensitive type facsimile apparatus using a roll-shaped recording sheet. In this facsimile apparatus, each time the recording sheet is recorded, the roll-shaped recording sheet has a predetermined size in the width direction thereof. A cutting device for cutting is provided.

Conventionally, a cutting device shown in FIGS. 11 to 13 has been known as a cutting device for such an application. In the figure, 1 is a guide frame, which extends along the cutting width direction of the recording paper P and has a length larger than the cutting width. Reference numeral 2 is a tool rest, which is movably supported in a groove formed along the length direction of the guide frame 1, and 3 is a fixed blade, which has a length larger than the recording paper cutting width. are doing.
The fixed blade 3 is arranged on the upper surface of the guide frame 1 along the length direction thereof and is fixed by a screw 4.
The recording paper P to be cut between the upper surface of the guide frame 1 and the upper surface of the guide frame 1.
A gap S for inserting is formed. 5 is a rotary blade, which is attached to the side of the tool rest 2 by a shaft 6. The blade portion of the fixed blade 3 and the blade of the rotary blade 5 are combined with each other. A pressing spring 7 for pressing the shaft 6 is attached to the tool rest 2.

Reference numeral 8 is a roller, which is rotatably held on the tool rest 2 so as to face the rotary blade 5. The roller 8 has one end contacting the back surface of the rotary blade 5 and the other end rotatably inserted in a groove formed in the guide frame 1 along its length direction. Further, the rollers 8 are held so that they can be displaced by a predetermined distance along the moving direction of the tool rest 2 about the shaft 6, and as shown in FIG.
Is located on the downstream side with respect to the moving direction of the tool rest 2.

The tool rest 2 is connected to a pulley 9 provided on the guide frame 1 and a belt 10 wound around a pulley (not shown). The pulley (not shown) is rotated by an electric motor (not shown).

When the recording paper P is to be cut by the cutting device having such a structure, the recording paper P to be cut is passed through the gap S between the upper surface of the guide frame 1 and the fixed blade 3. In this case, the entire width direction of the recording paper P is pressed by the fixed blade 3 having a length larger than the cutting width of the recording paper. The tool rest 2 is placed at a position outside the cutting area. A pulley (not shown) is rotated by an electric motor to rotate the belt 10 to move the tool rest 2 in the direction of the arrow in FIG. 13 along the length direction of the guide frame 1. The rotary blade 5 moves together with the tool rest 2. When the tool rest 2 moves, the rollers 8 are displaced downstream of the tool rest 2 about the shaft 6. As a result, the rotary blade 5 tilts as shown in FIG. Then, the rollers 8 rotate together with the tool rest 2 in sliding contact with the grooves of the guide frame 1 to rotate, and the rotation of the rollers 8 causes the rotary blade 5 to rotate. In this way, the rotary blade 5 moves along the fixed blade 3 while rotating, and the recording paper P is cut by the blade of the fixed blade 3 and the blade portion of the rotary blade 5.

[0007]

The conventional cutting device having such a structure has the following problems. First, in the conventional cutting device, the fixed blade 3 is directly attached to the guide frame 1, the rotary blade 5 is attached to the tool rest 2, and the tool rest 2 is attached to the guide frame 1. Therefore, the fixed blade 3 and the rotary blade 5 are based on the guide frame 1.
When the positional relationship between the fixed blade 3 and the fixed blade 3 is set, the component dimensional error of the guide frame 1 and the assembly error between the fixed blade 3 and the guide frame 1 have a synergistic effect, and the rotary blade 5
In the case of 1, the dimensional error of the turret 2, the assembly error between the rotary blade 5 and the turret 2 and the assembly error between the turret 2 and the guide frame 1 have a synergistic effect. That is, since the fixed blade 3 and the rotary blade 5 are directly attached differently from each other, it is difficult to set a highly accurate positional relationship due to many errors in setting the positional relationship. Therefore, in assembling the guide frame 1, the tool rest 2, the fixed blade 3 and the rotary blade 5, high dimensional accuracy of parts and assembly dimensional accuracy are required respectively.
The manufacturing and assembly costs of these parts are very high.

Secondly, the guide frame 1 is a rod-shaped member having a length longer than the cutting width of the recording paper, and has a form in which torsional deformation easily occurs. The fixed blade 3 is fixed to the guide frame 1, and the guide frame 1
Since it is fixed to the recording paper P, it has a strip shape having a length longer than the cutting width of the recording paper P. Therefore, the fixed blade 3
May be displaced under the influence of torsional deformation of the guide frame 1 and change with respect to the rotary blade 5.

In a cutting device having a rotary blade, it is necessary that the rotary blade and the fixed blade always maintain an appropriate positional relationship for cutting the recording paper. However, when the fixed blade 3 is displaced or deformed under the influence of the twisting deformation of the guide frame 1, it becomes impossible to maintain the proper positional relationship between the rotary blade 5 and the fixed blade 3 for cutting the recording paper. . Therefore, it is conceivable to increase the rigidity of the guide frame 1 to suppress the degree of occurrence of twisting deformation. In this case, the size of the guide frame 1 becomes large, the cost of the guide frame 1 increases, and the twisting deformation occurs. It is impossible to suppress the occurrence of.

Thirdly, since the fixed blade 3 is fixed to the guide frame 1, when the recording paper P is set in the facsimile apparatus, the recording paper P is fixed to the guide frame 1 and the fixed blade 3.
It is necessary to pass the gap S between and. However, the work of passing the recording paper P through the narrow gap S between the guide frame 1 and the fixed blade 3 is not easy and requires a lot of work.

The invention of the present application has been made in view of the above circumstances, and the positional relationship between the rotary blade and the fixed blade can be set easily and accurately while suppressing the component dimensional accuracy and the assembly dimensional accuracy of the rotary blade and the fixed blade. An object of the present invention is to provide a sheet cutting device that eliminates the work of inserting a sheet between a guide frame and a fixed blade.

[0012]

According to another aspect of the present invention, there is provided a sheet cutting device including a guide frame extending along a sheet cutting direction and having a sheet receiving surface on which the sheet is placed, and a longitudinal direction of the guide frame. A turret that is movably supported by the turret, and a fixed blade that is attached to the turret and that presses the sheet placed on the sheet receiving surface of the guide frame from the outside and that has a blade along the length direction of the guide frame. A rotary blade that is provided on the tool rest and rotates with the movement of the tool rest to cut the sheet together with the fixed blade on the sheet receiving surface of the guide frame; and a guide for the tool rest. And a moving device that moves along the frame.

According to this structure, the fixed blade is attached to the tool rest, not to the guide frame. When the sheet is cut, the fixed blade and the rotary blade move together with the tool rest to cut the sheet. Since the positional relationship between the fixed blade and the rotary blade is set directly and as a common reference on the tool rest to which they are attached, the component dimensional error and the assembly dimensional error that are involved in setting the positional relationship are compared with the conventional ones. Very few. Therefore, an appropriate positional relationship between the fixed blade and the rotary blade necessary for cutting the sheet can be set easily and accurately.

Since the fixed blade moves together with the turret,
It is not necessary to make the length longer than the sheet cutting length and attach it to the guide frame. Therefore, the fixed blade is not displaced or deformed under the influence of the twisting deformation of the long guide frame, and the proper positional relationship between the fixed blade and the rotary blade necessary for cutting the sheet is maintained. You can

Therefore, high precision is not required for the parts dimensions and the assembly dimensions of the guide frame, the tool rest, the fixed blade and the rotary blade, and the manufacturing cost and the assembly cost can be suppressed from increasing. Further, it is not necessary to give the guide frame high rigidity, and also in this respect, it is possible to avoid an increase in component cost and an increase in size of the guide frame.

Further, since the fixed blade moves while pressing the sheet placed on the upper surface of the guide frame when the sheet is cut, it suffices to place the sheet on the upper surface of the guide frame when setting the sheet, and the sheet acts as the fixed blade. There is no need for the troublesome work of inserting it between the guide frame.

According to a second aspect of the present invention, an electric motor that mounts the moving device on the tool rest, a gear that transmits the rotation of the electric motor to the rotary blade, and a lengthwise direction 8 of the guide frame are provided. It is characterized in that it is formed of a rack that is formed and meshes with the gear.

According to this structure, since the tool rest is equipped with an electric motor and is self-propelled, a belt or a pulley for separately transmitting the rotation of the electric motor to the tool rest to the tool rest is unnecessary, and the structure is reduced. It is simple.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the invention of claim 1 will be described with reference to FIGS. This embodiment applies the present invention to an apparatus for cutting a roll-shaped recording paper, which is an example of a sheet, into a predetermined size, for example, A4 size one page at a time in a thermal-sensitive facsimile apparatus, and then cutting the page. It was done.

FIG. 1 shows the entire cutting device. FIG.
Although not shown, a thermal head and a platen roller are provided in parallel with the cutting device on the left side of the cutting device, and a roll-shaped recording paper is set on the left side of the drawing. The recording sheet is recorded by being fed from the roll-shaped portion and conveyed while passing between the thermal head and the platen roller. As shown in the figure, the recording paper P on which recording is performed is stopped at the time when a predetermined cutting position reaches the cutting device, and is cut along the width direction.

In the figure, reference numeral 21 denotes a guide frame, which has a length longer than the width dimension (cut length) of the recording paper P and is arranged in a direction perpendicular to the recording paper conveyance direction. A guide groove 22 for guiding a tool rest 24, which will be described later, is formed in the guide frame along the length direction, and the groove 22 is open at one side surface portion of the guide frame 21. Further, a guide groove 23 for guiding rollers, which will be described later, is formed in the wall portion on the downstream side of the guide groove 22 in the recording paper conveyance direction along the length direction. The upper surface 21a of the guide frame 21 is a receiving surface for receiving the recording paper P.

A tool rest 24 is provided with an arm 25 which is engaged with the guide groove 22 of the guide frame 21 along the recording paper conveyance direction. The tool rest 24 is arranged on one side surface side of the guide frame 21, and the arm 25 is slidably inserted and engaged in the guide groove 22 formed in the guide frame 21. As a result, the tool rest 24 becomes the guide frame 21.
In its length direction (direction perpendicular to the recording paper conveyance direction)
Holds movably along.

The tool rest 24 is provided with a fixed blade 26 and a rotary blade 30, and includes a fixed blade mounting portion 24a, the fixed blade mounting portion 24a and a rotary blade mounting portion 24b arranged in the length direction of the guide frame, and both of them. Rotary blade cover 24c located between the portions 24a and 24b, rotary blade mounting portion 24b
It has a presser spring attachment portion 24d located on the lower side.

Reference numeral 26 is a fixed blade made of a metal plate, which has a straight blade 27 on one side edge, and the cross section of this blade 27 is as shown in FIG. The fixed blade 26 has a mounting piece 26 that is bent downward at one end.
a is formed. Then, the fixed blade 26 is arranged above the upper surface 21a of the guide frame 21 along the longitudinal direction with a small gap S therebetween, and the blade 27 is provided with the blade 27.
1 protrudes outward from the longitudinal edge of the upper surface 21a on the downstream side in the recording paper conveyance direction, and extends along the longitudinal edge of the upper surface 21a. In this way, the fixed blade 26 is attached to the guide frame 21.
The recording paper P placed on the upper surface 21a is pressed and cut from above.

The mounting piece 26a of the fixed blade 26 is the tool post 2.
The guide frame 21 in the fixed blade mounting portion 24a of No. 4
It is in contact with the surface on the opposite side (the surface on the downstream side in the recording paper conveyance direction). The attachment piece 26a is passed through the screw 28,
It is attached to the fixed blade attachment portion 24a by being screwed into a screw hole 29 (shown in FIG. 5) formed in the fixed blade attachment portion 24a. The fixed blade 26 has a length shorter than the length of the recording paper P in the width direction, and has a length necessary and sufficient for cutting the recording paper P. Reference numeral 26b is a portion that prevents the fixed blade 26 from being caught by the recording paper P.

Reference numeral 30 denotes a disk-shaped rotary blade made of metal, and a blade 31 having a sectional shape shown in the drawing is formed on the peripheral portion of the rotary blade. The rotary blade 30 is the rotary blade mounting portion 24 of the tool rest 24.
On the side opposite to the guide frame 21 in b (downstream side in the recording paper conveyance direction), the upper end of the blade 31 is the blade 2 of the fixed blade
It is arranged vertically so as to contact with 7. The rotary blade 30 has a shaft 3 inserted into a hole 33 formed in the rotary blade mounting portion 24 along a direction perpendicular to the recording paper conveyance direction.
It is rotatably held at 2.

Reference numeral 34 is a pressing spring formed of a metal plate spring, which is arranged upright on the outer side of the rotary blade 30 and has a screw 3
It is attached to the presser spring attachment portion 24d by screwing through 5 into a screw hole 36 formed in the presser spring attachment portion 24d. This causes the presser spring 34 to move the rotary blade 30.
The shaft 32 for holding is elastically pressed from the outside.

Reference numeral 37 is a roller, and 38 is a holder having a horizontal long hole 39 for fitting and holding the roller 37. Holder 3
8 is a shaft 32 at the rotary blade mounting portion 24b of the tool rest 24.
It is fitted and fixed in a fitting hole 40 formed at a lower position. That is, the elongated holes 39 of the holder 38 fitted and fixed in the fitting holes 40 extend in the same length on the upstream side and the downstream side of the shaft 38 along the tool post moving direction.

The roller 37 is rotatably fitted in the holder 38 so as to be slidable in the elongated hole 39 and slidable in the longitudinal direction thereof. That is, the roller 37 is held so that it can be displaced by a predetermined distance along the moving direction of the tool rest 24 about the shaft 32. For example, as shown in FIG. It is located on the downstream side with respect to the moving direction of 24.

One end of the roller 37 projects toward the rotary blade 4 and contacts the side surface of the rotary blade 4 facing the rotary blade mounting portion 24b. However, the protruding length of one end of the roller 37 is larger than the distance between the surface of the rotary blade mounting portion 24b and the side surface of the rotary blade 30. Therefore, the roller 37
When one end of the rotary blade 30 contacts the side surface of the rotary blade 30, the rotary blade 30 is pushed by one end of the roller 37 and tilts as shown in FIG.

The other end of the roller 37 is rotatably inserted in a guide groove 23 formed in the guide frame 1 along its length. That is, when the tool rest 24 moves along the longitudinal direction of the guide frame 21, the other end of the roller 37 is rotated by friction with the guide groove 23, and the entire roller 37 is rotated.

The tool rest 24 is connected to a pulley 41 provided on the guide frame 21 and a belt 42 wound around a pulley (not shown). The pulley (not shown) is rotated by an electric motor (not shown). That is, when the belt 42 is rotated by the electric motor, the tool rest 24 is given a driving force and moved along the length direction of the guide frame 21. The electric motor, the pulley 41, and the belt 42 are devices that move the tool rest 22 along the length direction of the guide frame 21.

When the recording paper P is cut by the cutting device constructed as described above, the rolled recording paper P set in the facsimile machine is fed out as shown in FIG. After passing through the space, it is placed on the upper surface 21a of the guide frame 21. At this time, the length direction of the guide frame 21 and the width direction of the recording paper P match. Both ends of the guide frame 21 project from the recording paper P. The tool rest 24 is located at the end of the guide frame 21 that is out of the cutting area.

Then, a pulley (not shown) is rotated by an electric motor to rotate the belt 42, for example, in a direction indicated by an arrow. The tool rest 24 is pulled by the belt 42, guided by the guide groove 22 of the guide frame 21, and moved in the direction of the arrow in the figure along the length direction. Fixed blade 2 with turret 24
6, the rotary blade 30 and the roller 37 move together in the same direction.

Due to the frictional resistance between the one end of the roller 37 and the guide groove 23 of the guide frame 21, when the tool rest 24 starts moving, the frictional resistance between the one end of the roller 37 and the guide groove 23 of the guide frame 21 causes 37 is a turret 24
At the same time, do not move in the same direction. Therefore, the turret 24
With this, the holding body 38 moves, and the rollers 37 move to the holding body 38.
The inside of the long hole 39 is slid, and as shown in FIG.
Collides with the downstream end of the tool post in the moving direction. That is, the other end of the roller 37 comes into contact with a side surface portion of the rotary blade 30 downstream of the shaft 32 in the tool post moving direction. For this reason,
The rotary blade 30 is pushed by the other end of the roller 37, and a portion on the downstream side in the tool rest movement direction is separated from the tool rest 24, and a portion on the upstream side in the tool rest movement direction is inclined so as to approach the tool rest 24. When the rotary blade 30 tilts, the peripheral edge of the end surface of the roller 37 is rotated by the rotary blade 3.
Touch 0. Accordingly, when the roller 37 rotates, the rotation is transmitted to the rotary blade 30 and the rotary blade 30 can be rotated.

When the tool rest 24 moves in the direction of the arrow in the figure,
The roller 37 held at the downstream end of the elongated hole 39 of the holder 38 in the tool post moving direction rotates by friction with the guide groove 23 of the guide frame 21. Therefore, as described above, the rotary blade 30 is rotated by the rotation of the roller 37. The upper end of the blade 31 of the rotating rotary blade 30 is the blade 27 of the fixed blade 26.
Pass through.

Here, as the tool rest 24 moves in the direction of the arrow in FIG. 1, the fixed blade 26 passes above the upper surface 21a of the guide frame 21 and is placed on the upper surface 21a of the guide frame 21. Press the paper P from above. That is, the recording paper P placed on the upper surface 21 a of the guide frame 21 enters the gap S between the blade 27 of the fixed blade 26 and the upper surface 21 a of the guide frame 21.

Then, the blade 31 of the rotating rotary blade 30 and the blade 27 of the fixed blade 26 are cut.
In this case, the rotary blade 30 is pushed by the other end of the roller 37 so that the portion on the downstream side in the tool rest moving direction is separated from the tool rest 24 and the portion on the upstream side in the tool rest moving direction is inclined so as to approach the tool rest 24. Therefore, the recording paper P is sheared with a small shearing force. By moving the tool rest 24 in the entire width direction of the recording paper P, the recording paper P can be continuously cut over the entire width direction. That is, although the fixed blade 26 has a length shorter than the length of the recording paper P in the width direction, the fixed blade 26 is moved in the entire width direction of the recording paper P together with the tool rest 24 so as to have the same length as the width of the recording paper P. It can perform the same function as that having a length.

Although the case where the tool rest 24 is moved in the direction of the arrow in the drawing has been described above, the same operation is performed when the tool rest 24 is moved in the opposite direction. That is, the cutting apparatus of this embodiment can cut the recording paper P when the tool rest 24 is reciprocated.

According to this embodiment, the fixed blade 26 is attached to the tool rest 24 together with the rotary blade 30, and the fixed blade 26 is not attached to the guide frame 21. When cutting the recording paper P, the fixed blade 26 together with the tool rest 41 is used.
And the rotary blade 30 moves together to perform cutting.

Since the positional relationship between the fixed blade 26 and the rotary blade 30 is set directly and as a common reference on the tool rest 24 to which they are attached, a dimensional error in the parts involved in setting the positional relationship and The assembly dimensional error is very small compared to the conventional one. Therefore, an appropriate positional relationship between the fixed blade 26 and the rotary blade 30 necessary for cutting the recording paper P can be set easily and accurately.

Further, since the fixed blade 26 moves together with the tool rest 24, it is not necessary to attach the fixed blade 26 to the guide frame 21 in a length longer than the cutting length of the recording paper P. Therefore, even when the long guide frame 21 is twisted and deformed, the fixed blade 26 is not displaced or deformed under the influence of the twisted deformation of the guide frame 21 and is used for cutting the recording paper P. It is possible to maintain the necessary proper positional relationship between the fixed blade 26 and the rotary blade 30.

Therefore, the guide frame 21 and the turret 2
4, high accuracy is not required for the component dimensions and the assembly dimensions of the fixed blade 26 and the rotary blade 30, and the increase in manufacturing cost and assembly cost can be suppressed. Further, it is not necessary to give the guide frame 21 high rigidity, and in this respect as well, it is possible to avoid an increase in component cost and an increase in size of the guide frame 21.

Further, the fixed blade 26 is placed on the upper surface 21a of the guide frame 21 when the recording paper P is cut.
Since it moves while pressing the leading edge of the recording paper P, the leading edge of the recording paper P is set on the upper surface 21
It suffices to place it on a, and the troublesome work of inserting the tip of the recording paper P between the fixed blade 26 and the guide frame 21 is not required.

Next, an embodiment of the invention of claim 2 will be described with reference to FIGS. 7 to 10.

In this embodiment, a tool rest is equipped with an electric motor for self-propelling. 7 to 10, reference numeral 51 denotes a guide frame, which is the upper surface 5 of the guide frame.
1a is a surface for receiving the recording paper P, and the guide frame 51 has a guide groove 52 and a rack 53 along the length direction.
Are formed. Reference numeral 54 is a tool rest, and an arm 55 formed on the tool rest is slidably engaged with the guide groove 52 of the guide frame 51. Thereby, the tool rest 54 is movably provided on the guide frame 51. Reference numeral 56 denotes a fixed blade, which is arranged on the upper side of the upper surface of the guide frame 51 with a gap S into which the recording paper P enters, and is attached to the tool rest 54 by a screw 57. The fixed blade 56 is a blade 5 along the lengthwise edge of the upper surface 51 a of the guide frame 51.
6a.

Reference numeral 58 is an electric motor, which is fixed to the tool rest 54 by appropriate means. A gear 60 is attached to an output shaft 59 of the electric motor 58, and a gear 62 meshing with the gear 60 is attached to a shaft 61 provided on the tool rest 54. This gear 62 is also the guide frame 51
It also meshes with the rack 53. Further, a rotary blade 63 is attached to the shaft portion of the gear 62. The blade 63a of the rotary blade 63 is combined with the blade 56a of the fixed blade 56. 6
Reference numeral 4 denotes a ring for preventing the gear 62 attached to the shaft 61 from coming off.

Therefore, when the electric motor 58 is driven and the gear 62 is rotated via the gear 60, the tool rest 54 is fitted in the guide groove 52 of the guide frame 51 by the combination of the gear 62 and the rack 53 of the guide frame 51. Will be transported along. The fixed blade 56 and the rotary blade 63 mounted on the tool rest 54 move together with the tool rest 54. At the same time, the rotary blade 63 is rotated by the rotation of the gear 62.

Therefore, when the roll-shaped recording paper P is placed on the upper surface of the guide frame 51, the recording paper P placed on the upper surface of the guide frame 51 is moved by the fixed blade 56 and the rotary blade 63 which move together with the tool rest 54. It is possible to cut along the guide frame 51.

In this embodiment, when the fixed blade 56 and the rotary blade 63 are provided as in the above-described embodiments, the positional relationship is set with the tool rest 54 to which they are attached as a direct and common reference. Therefore, it is possible to easily and accurately set the required positional relationship. Further, since the fixed blade 56 moves together with the tool rest 54,
It is not necessary to mount the recording paper P on the guide frame 51 with a length longer than the cut length of the recording paper P. Therefore, the fixed blade 56 is not displaced or deformed under the influence of the torsional deformation of the guide frame 51 even when the long guide frame 51 is twisted and deformed.

Therefore, the guide frame 51 and the tool rest 5
4, high precision is not required for the component dimensions and the assembly dimensions of the fixed blade 56 and the rotary blade 63, and the increase in manufacturing cost and assembly cost can be suppressed. Further, it is not necessary to give the guide frame 51 a high rigidity, and in this respect as well, it is possible to avoid an increase in component cost and an increase in size of the guide frame 51.

Furthermore, when the recording paper P is cut, the fixed blade 56 moves while pressing the leading end of the recording paper P placed on the upper surface of the guide frame 51, so that the leading end of the recording paper P is guided when setting the recording paper P. It suffices to place it on the upper surface of the frame 51, and the troublesome work of inserting the tip of the recording paper P between the fixed blade 56 and the guide frame 51 is not necessary.

Further, in this embodiment, the tool rest 54
Does not require a belt or pulley for transmitting the rotation of the electric motor separately provided for moving the tool rest 54 to the tool rest 54 as in the embodiment of the invention described above. Becomes

The invention of the present application is not limited to the above-described embodiments, but can be modified in various ways. For example, the invention of the present application is not limited to the case of cutting a roll-type recording paper in a facsimile machine, but can be widely used for cutting a roll-type ink film.

[0055]

As described above, according to the sheet cutting apparatus of the first aspect of the present invention, the fixed blade is attached to the tool post together with the rotary blade. Therefore, when cutting the sheet, the fixed blade and the rotary blade are installed together with the tool post. Is moved and cutting is performed.

As a result, the positional relationship between the fixed blade and the rotary blade is set directly and as a common reference on the tool rest to which they are attached. Therefore, the component dimensional error and the assembly dimensional error that are involved in setting the positional relationship are set. Is much less than the conventional one. Therefore, an appropriate positional relationship between the fixed blade and the rotary blade necessary for cutting the recording paper P can be set easily and accurately.

Further, since the fixed blade moves together with the tool rest, it is not necessary to make it longer than the sheet cutting length and attached to the guide frame. Therefore, the fixed blade is not displaced or deformed under the influence of the twisting deformation of the long guide frame, and the proper positional relationship between the fixed blade and the rotary blade necessary for cutting the sheet is maintained. You can

Therefore, high precision is not required for the parts dimensions and the assembly dimensions of the guide frame, the tool rest, the fixed blade and the rotary blade, and the increase in the manufacturing cost and the assembly cost can be suppressed. Further, it is not necessary to give the guide frame high rigidity, and also in this respect, it is possible to avoid an increase in component cost and an increase in size of the guide frame.

Further, since the fixed blade moves while pressing the sheet placed on the upper surface of the guide frame when cutting the sheet, it suffices to place the sheet on the upper surface of the guide frame when setting the sheet. There is no need for the troublesome work of inserting between.

Further, according to the invention of claim 2, since the tool rest is equipped with an electric motor and is self-propelled, a belt or pulley for transmitting the rotation of the electric motor separately provided for moving the tool rest to the tool rest is provided. It becomes unnecessary and the configuration becomes simple.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cutting device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the cutting device of the same embodiment.

FIG. 3 is a front view showing the cutting device according to the embodiment.

4 is a sectional view taken along the line AA of FIG.

FIG. 5 is a sectional view taken along the line BB in FIG. 3;

6 is a cross-sectional view taken along the line CC of FIG.

FIG. 7 is a perspective view showing a cutting device according to an embodiment of the invention of claim 2;

8 is a cross-sectional view taken along the line DD of FIG.

FIG. 9 is a front view showing the cutting device according to the embodiment.

FIG. 10 is a plan view showing the cutting device according to the embodiment.

FIG. 11 is a view showing a cutting device according to a conventional embodiment.
Sectional drawing which follows the FF line of FIG.

FIG. 12 is a plan view showing the conventional cutting device.

FIG. 13 is a front view showing the conventional cutting device.

[Explanation of symbols]

 21 ... Guide frame, 22 ... Guide groove, 23 ... Guide groove, 24 ... Turret, 24a ... Fixed blade mounting portion, 24b ... Rotating blade mounting portion, 24c ... Cover, 24d ... Spring mounting portion, 25 ... Arm, 26 ... Fixed blade, 27 ... Blade, 28 ... Screw, 30 ... Rotating blade, 31 ... Blade, 32 ... Shaft, 34 ... Holding spring, 35 ... Screw, 37 ... Roller, 38 ... Holding body, 51 ... Guide frame, 53 ... Rack 54 ... Turret, 56 ... Fixed blade, 58 ... Electric motor, 60 ... Gear, 62 ... Gear, 63 ... Rotating blade

Claims (2)

[Claims] 1. A guide frame extending along a cutting direction of a sheet and having a sheet receiving surface on which the sheet is placed, a tool rest movably supported by the guide frame in its length direction, and this tool. A fixed blade that is attached to a table and that presses the sheet placed on the sheet receiving surface of the guide frame from the outside and that has a blade along the length direction of the guide frame, and for moving the tool platform provided on the tool platform. A rotary blade that rotates together with the fixed blade to cut the sheet placed on the sheet receiving surface of the guide frame, and a moving device that moves the tool rest along the guide frame. Sheet cutting device. 2. The moving device comprises an electric motor mounted on the tool post, a gear for transmitting the rotation of the electric motor to the rotary blade, and a gear formed along the length direction of the guide frame to mesh with the gear. The sheet cutting apparatus according to claim 1, further comprising: