JPH02269596A - Cutting device for sheet material - Google Patents

Abstract

PURPOSE:To surely cut a sheet material by providing a guide rail which slidingly holds a support stand in such a position as sandwitching a disc plate edge against the end of a fixed edge, and supporting the support stand in such a manner that it can make a turning movement about the axis of the guide rail, and providing a habit of rotation in such a direction that the peripheral end of the disc plate edge makes pressure contact with the end of the fixed edge. CONSTITUTION:A disk plate edge 5 rotatably supported on a support stand 3a slidably supported by a guide rail 2 provided in parallel relation to a straight fixed edge 1 runs along a guide rail 2 wits its peripheral edge crossing and making pressure contact with the end of the fixed edge, thereby cutting a sheet material 8. In this case, the guide rail 2 is provided with respect to the end of the fixed edge 1 in such a position as sandwitching the disc plate edge 5, and the support stand 3a is supported by a dead weight 6 in such a manner as capable of turning movement about the axis of the guide rail 2, and a habit of rotation is provided in such a direction that the peripheral edge of the disc plate edge 5 crosses and makes pressure contact with the end of the fixed edge 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for cutting long sheet materials such as paper, cloth, and film. This invention relates to a fixed blade having a cutting edge, and a structure in which cutting is performed by moving along a guide rail so that each cutting edge crosses and presses against each other.

[Conventional technology]

A conventional example of this type of cutting device is
The one described in Japanese Patent No. 4466 is known.

=3 In conventional devices of this type, a guide mechanism is used to maintain a holding table that rotatably holds the disc blade and moves it in the cutting direction, and maintains the position and orientation within a certain range with respect to the cutting edge of the fixed blade. and the disc blade is elastically supported on the holding base so that its peripheral cutting edge is in cross-pressure contact with the fixed blade.

[Problem to be solved by the invention]

As mentioned above, this type of conventional cutting device has a guide mechanism that maintains the posture of the holding table and a mechanism that presses the disc blade and the fixed blade, making the cutting device complicated and large. There was a drawback.

An object of the present invention is to provide a cutting device with a simpler structure by devising the arrangement of component parts.

[Means to solve the problem]

The present invention provides a guide rail for slidingly holding a holding stand at a position such as to sandwich the disk blade against the cutting edge of a fixed blade, supporting the holding stand so as to be rotatable around the axis of the guide rail, This sheet cutting device is characterized in that the circumferential cutting edge of the disk blade has a rotational habit in a direction in which the cutting edge of the fixed blade crosses into pressure contact with the cutting edge of the fixed blade.

That is, the present invention has a fixed blade that is a straight blade, and a disc blade that is rotatably held on a holding base that is slidably held by a guide rail provided parallel to the fixed blade, and that has a cutting edge on its periphery. In a sheet cutting device that cuts a sheet material by traveling along the guide rail while being in cross-pressure contact with the fixed blade edge, the guide is placed in a position such that the disk blade is sandwiched between the fixed blade edge and the fixed blade edge. A rail is provided, and the holding stand is rotatably supported around the axis of the guide rail, and a peripheral cutting edge of the disc blade is given a rotational habit in a direction in which the cutting edge of the disc blade crosses and presses against the cutting edge of the fixed blade. This is a sheet material cutting device characterized by the following.

Among these, the rotational behavior is characterized by being given by the unbalanced weight of the holding table, and the rotational behavior is provided by providing a bar parallel to the guide rail.
Characteristically, the rotational behavior is provided through the bar material 1. The rotational behavior is provided by the magnetic attractive force between the steel bar material fixed parallel to the guide rail and the permanent magnet fixed to the holding base. Characteristics: The rotational behavior is provided by a member that is parallel to the fixed blade and movable in a direction perpendicular to the sheet material to be cut pressed against the peripheral surface behind the cutting edge of the disc blade. The member movable in the direction perpendicular to the sheet material to be cut is characterized in that a part of the sheet material guide member having a parallel gap that serves as a guide portion for the sheet material is pressed into contact with the curved part behind the cutting edge of the disc blade. A member movable in the direction perpendicular to the sheet material to be cut is provided with a notch at the end of the member that comes into contact with the rear peripheral surface of the cutting edge of the disc blade, and the member is movable in a direction perpendicular to the sheet material to be cut. The circular blade is fixed in parallel with the guide rail, and a holding stand for the disc blade holds a part of the round blade. It is desirable that the guide rail includes a reinforcing member that moves while sliding and suppresses deflection occurring in the guide rail.

In the sheet material cutting device of the present invention, the guide mechanism of the holding table is a single rod-shaped member having the simplest structure, and the two freedoms are linear movement in the longitudinal direction and rotation around this longitudinal axis. The position and posture of the holding table itself is determined by aligning the degree of rotation and the M movement of rotation with the direction of cross-pressure contact of the cutting edge of the disc blade, and the cross-pressure contact of the peripheral edge of the disc blade with the fixed blade. Therefore, the mechanism for press-contacting the disk blade and the mechanism for maintaining the posture of the holding table are used together, and since the cutting reaction force can be used as the press-contact force, the overall structure can be made extremely simple.

〔Example〕

1 and 2 are diagrams for explaining the first embodiment of the present invention, in which a fixed blade J having a straight cutting edge and a round bar-shaped guide rail 2 are fixed in parallel, and the guide rail 2 slides. A disc blade 5 is held on a movably mounted holding base 3a via a rotation support 4. Here, the guide rail 2 is provided at a position such that it sandwiches the disc blade 5 with respect to the fixed blade 1.

The holding stand 3a is rotatably supported around the axis of the guide rail 2, which is a round shaft. In addition, a weight 6 is fixed to the holding table 3a, which generates an unbalanced moment with respect to the guide rail 2, rotates in the direction of the arrow, and presses the cutting edge of the disc blade 5 against the fixed blade 1. There is.

The guide rail 2 is provided at a position where the disk blade 5 is sandwiched between the fixed blade core, and the holding table 3a is rotatably supported around the axis of the guide rail 2. The cutting reaction force applied to the cutting edge generates a rotational behavior (moment) in the same direction as the pressing of the cutting edge by a weight, so if the cutting resistance is large, such as when the sheet material to be cut is thick or hard, the automatic It has the characteristic that the pressure force between the cutting edges becomes large.

The holding table 3a is reciprocated in the longitudinal direction by a wire 7 and cuts the sheet material 8.

FIG. 3 shows a second embodiment of the present invention.
The bar 9 that has passed through b has its one end fixed by a tension spring 1o to give the holding base 3b the habit of rotating around the guide rail 2, and press the peripheral edge of the disc blade 5 against the fixed blade 1. There is.

In this case, by selecting the tension of the spring, the cutting device can be installed regardless of the direction of gravity.

FIG. 4 shows a third embodiment of the present invention.
A permanent magnet core 1 fixed to a part of the guide rail 2
A magnetic force is exerted in a direction that always attracts the steel bar 12 installed parallel to the holding table 3C, and the peripheral edge of the disc blade 5 is pressed against the fixed blade 1 by giving the holding table 3C a rotational habit.

In this case, the cutting device can be installed regardless of the direction of gravity, and compared to the second embodiment, the holding table 3c
It is possible to suppress the friction loss associated with the drive of the

FIG. 5 shows a fourth embodiment of the present invention, in which a disc blade 5
The cylindrical portion J3 on the periphery of is connected to the round bar guide rail 2 by an extensible spring 15 via a bar 14, which is a member installed parallel to the fixed blade 1 and movable in a direction perpendicular to the sheet material 8 to be cut. The peripheral edge of the disc blade 5 is pressed against the fixed blade 1. Since the sheet material 8 to be cut is sandwiched and fixed between the peripheral edge of the disc blade 5 and the bar 14, reliable cutting can be performed.

FIG. 6 shows a fifth embodiment of the present invention, in which a sheet guide member 6 having a gap for guiding the sheet material 8 is connected to a disc blade by a spring 15 in the same manner as in the fourth embodiment. The peripheral edge blade 5 is pressed against the fixed blade 1. However, this pressure contact is due to rotation around the bottle 22 by the spring]5.

In an actual cutting device, since the essential guide member for the sheet material is also used for pressure contact of the disk blade, the overall structure of the cutting device can be made simpler.

FIG. 7 shows a sixth embodiment of the present invention, which has a mechanism for pressing the disk blade 5 similar to the fourth or fifth embodiment, and has notches 18 at both ends of a bar 17. ing. Therefore, when the disc blade 5 is at both end positions, the extensible spring 5 causes the bar material 1 to extend by the depth of the notch 18.
7 will rotate a lot, and this rotation will be controlled by switch 1.
If detected by 9, the disc blade 5 is at both end positions,
It can be seen that the cutting device is ready to feed the sheet material.

FIG. 8 shows a seventh embodiment of the present invention, in which the holding table 3
A part of the outer peripheral surface of d is a cylindrical surface, and the guide rail 2
This cylindrical portion slides in contact with a reinforcing member 20.21 installed parallel to.

In this case, especially when cutting a thick and hard sheet material, the deflection that occurs in the guide rail 2 can be suppressed to a small extent, and stable cutting becomes possible.

In the above embodiments, the guide rail 2 is shown as a round bar material, but the present invention is not limited to this.

It is also possible to use a square bar with both ends rotatably supported.

In short, it is sufficient that the support base 3 is rotatable around its axis.

〔Effect of the invention〕

As explained above, the present invention provides a guide rail that slides and holds a holder at a position where the disc blade is sandwiched between the cutting edge of a fixed blade, and rotates the holder around the axis of the guide rail. To provide a cutting device capable of performing reliable cutting with a simple structure in which a disc blade is movably supported and a peripheral cutting edge of a disc blade is given a rotational habit in a direction in which the cutting edge of a fixed blade comes into pressure contact with the cutting edge of a fixed blade.

In addition, "bar material movable in the direction perpendicular to the sheet material to be cut" described in item 5.6.7 of the claims of the present invention
This includes the case where the circumferential surface of the disc blade is pressed against the circumferential surface of the disk blade by the rotational movement of a bar having a rotational fulcrum by the bin 22, as in the embodiment shown in FIG.

[Brief explanation of drawings]

1 and 2 are respectively a perspective view and a sectional view showing a second embodiment of the present invention, FIG. 3 is a perspective view showing a second embodiment of the present invention, and FIG. 4 is a perspective view showing a third embodiment of the present invention. 5 is a cross-sectional view showing the fourth embodiment of the present invention; FIG. 6 is a cross-sectional view showing the fifth embodiment of the present invention; FIG. 7 is a sixth embodiment of the present invention. and FIG. 8 are perspective views showing the seventh aspect of the present invention.
It is a sectional view showing an example.

Claims (1)

[Scope of Claims] 1. A disc blade that has a fixed blade that is a straight blade, and is rotatably held on a holding base that is slidably held by a guide rail provided parallel to the fixed blade, and the peripheral edge of the disc blade is In a sheet material cutting device that cuts sheet material by traveling along the guide rail while cross-pressing the blade edge against the fixed blade edge, the disc blade is placed in a position such that the disc blade is sandwiched between the blade edge of the fixed blade. The guide rail is provided, the holding stand is rotatably supported around the axis of the guide rail, and the peripheral cutting edge of the disc blade has a rotational habit in a direction in which the cutting edge of the disk blade is in cross-pressure contact with the cutting edge of the fixed blade. A sheet material cutting device characterized by the following. 2. The sheet material cutting device according to claim 1, wherein the rotational behavior is provided by the unbalanced weight of the holding table. 3. The sheet material cutting device according to claim 1, wherein the rotational behavior is provided through a bar provided parallel to the guide rail. 4. The sheet material according to claim 1, wherein the rotational behavior is provided by magnetic attraction between a steel bar fixed in parallel to a guide rail and a permanent magnet fixed to a holding base. Cutting device. 5. The rotational behavior is provided by pressing a member parallel to the fixed blade and movable in a direction perpendicular to the sheet material to be cut against the circumferential surface behind the cutting edge of the disc blade. The sheet material cutting device according to item 1. 6. The member movable in the direction perpendicular to the sheet material to be cut is characterized in that a part of the sheet material guide member having a parallel gap, which serves as a guide portion for the sheet material, is pressed against the peripheral surface portion behind the cutting edge of the disc blade. A sheet material cutting device according to claim 5. 7. A member movable in the direction perpendicular to the sheet material to be cut is provided with a notch at the end thereof in contact with the rear peripheral surface of the cutting edge of the disc blade, and the position of the member can be detected. According to the fifth aspect of the present invention, it is detected whether the round blade is in either the left or right standby position.
The sheet material cutting device according to item 6 or item 6. 8. A reinforcing member fixed in parallel with the guide rail, on which a holding stand for the disc blade moves while sliding a part of the reinforcing member, suppressing deflection occurring in the guide rail. The sheet material cutting device according to scope 1.