JP2960593B2 - Guide sheet material cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication facsimile,
The present invention relates to a sheet material cutting device with a guide used for various printers, copying machines, and the like.

[0002]

2. Description of the Related Art In a device for cutting a sheet material by pressing a fixed blade against a movable blade, a sheet material to be cut is surely formed with a gap formed by a cutting edge of each of the fixed blade and the movable blade in order to perform smooth cutting. Must be passed through. For this reason, it is necessary to provide a guide device for the sheet material, and various sheet material cutting devices with a guide have been conventionally proposed. Japanese Patent Application Laid-Open No. 57-173982 and Japanese Utility Model Application Laid-open No.
2. Description of the Related Art A cutting device disclosed in Japanese Patent Application Laid-Open No. 9297 and No. 1-99590 is known. Above actual opening 57
The cutting device disclosed in Japanese Patent Publication No. 173982 has a structure in which a plate-like blade 3 is supported on a base plate 5 by a leaf spring 4 as shown in FIG.
As shown in FIG. 4, the cutting device disclosed in Japanese Patent No. 29297 is a device in which a guide plate 7 of a material to be cut prepared as a separate component is fastened to a fixed blade 3 whose both ends are rotatably supported. Further, the conventional apparatus disclosed in Japanese Utility Model Laid-Open Publication No. 1-99590 supports a metal blade of a fixed blade to a base plate by a leaf spring,
Further, the leaf spring is bent substantially in an L shape, and is a cutting device having a structure also serving as a guide plate for guiding a material to be cut to the cutting edge of the fixed blade.

[0003]

Among the above-mentioned conventional cutting apparatuses, the conventional apparatus disclosed in Japanese Utility Model Laid-Open Publication No. Sho 57-173982 requires a separate guide plate for the material to be cut. , The number of parts increases and the structure becomes complicated,
This is the opposite from the viewpoint of reducing the size and weight of the device. The conventional device described in Japanese Utility Model Laid-Open Publication No. 62-29297 relates to a material guide plate to be cut and fastened to a fixed blade. The guide plate has a substantially L-shaped cross section and is fastened to the fixed blade. This is a technique to prevent the distortion caused by the guide plate and the fixed blade surface from affecting the fixed blade.It is necessary to separately prepare means for supporting the fixed blade on the base plate and means for pressing the fixed blade on the rotating blade. There is. Further, in the conventional apparatus disclosed in Japanese Utility Model Laid-Open No. 1-99590, a fixed blade support plate, a blade support plate, and a material guide plate to be cut are integrally formed of a thin plate material, and two portions are bent into an L-shape. The blade is fixed to the blade support plate to form a fixed blade. A part of the bent thin plate material is fixed to the base plate as a support plate for the fixed blade, and the fixed blade is pressed against the rotary blade. This is also used as a spring. The opposite end surface of the L-shaped portion is used as a guide plate to be cut, and the blade is fixed to the blade holding plate on the L-shaped side surface. A groove is formed in the portion in a direction perpendicular to the traveling direction of the material to be cut. The problem that the tip of the material to be cut is caught in this groove and the material to be cut is jammed,
This tendency is greater in a cutting device having a structure in which the inside of the roll of the material to be cut wound in a roll shape is the fixed blade side. In addition, the blade metal is fixed to the blade holding plate, and if the coefficient of thermal expansion is different, the distortion caused by the difference in the amount of expansion and contraction of each other will be harmful to the engagement with the fixed blade, and cutting defects will be caused. There are also problems such as the possibility of triggering. The present invention has been made to solve the above-mentioned problems, and to provide a guide-attached sheet material cutting device capable of performing smooth cutting by eliminating a problem that hinders the advancement of the sheet material and reducing the size and weight of the entire device. Is what you do.

[0004]

SUMMARY OF THE INVENTION The inventor of the present invention has conducted various studies to solve the above-mentioned problems of the prior art, and as a result, the guide sometimes hinders the advance of the sheet material to be cut. The guide must be shaped like a single plate because it can cause jamming of the sheet material.By using the plane of the fixed blade as a guide, it is necessary to attach another guide member. This is based on the finding that there is no guide for the sheet material. Furthermore, it has been found that if the means for supporting the fixed blade and the means for pressing the fixed blade against the movable blade are also used by a leaf spring, the number of parts is small and the apparatus can be reduced in size and weight, and the present invention has been completed. More specifically, the present invention relates to a movable blade that rotatably or swingably supports shafts provided at both ends thereof, a thin plate formed into an L-shape, and an end of the other surface of the L-shape being a base plate. And a fixed blade having a flat plate shape and fixed to one surface of the L-shape of the flat spring so that the flat plate-shaped plane is parallel to the traveling direction of the sheet material. Things. The other surface of the L-shaped leaf spring fixed to the base plate biases the fixed blade so as to press the movable blade against the movable blade, and the plane of the fixed blade guides the sheet material. It is a material cutting device.

[0005]

According to the present invention, the material to be cut fed to the cutting device is guided by a sheet guide plate which also serves as the plane of the fixed blade.
Guided to the gap formed by the fixed blade and the rotary blade, and after reaching the desired length, the rotary blade is rotated and at the same time, the blade edge of the fixed blade and the blade edge of the rotary blade which are previously pressed against the rotary blade with a leaf spring. Is a device that cuts the material to be cut by meshing in an inclined linear shape. The fixed blade is held in the horizontal direction, and the leaf spring that presses against the rotating blade and the member that supports the fixed blade on the base plate have an integral structure. The L-shaped part that supports the fixed blade reinforces the thin plate-shaped fixed blade. It also serves as an effect as a rib to be formed, and the bending caused by mutual engagement of the rotating blade and the fixed blade during cutting is extremely reduced. By fixing the fixed blade and the leaf spring with screws, the positions of the fixed blade and the leaf spring can be corrected, and the adjustment of the engagement with the rotary blade becomes easy. Since the guide of the sheet material in the present invention is characterized in that it uses the plane of the fixed blade, there is no problem such as preventing the sheet material from advancing and causing a jam, so that it can be cut smoothly and used as a guide. It is not necessary to process and mount another member. Further, the present invention is characterized in that both the means for pressing the fixed blade against the movable blade and the means for supporting the fixed blade, both of which are indispensable for the sheet material cutting device, are shared by an L-shaped leaf spring. In addition, since the structure can be made very simple, the entire apparatus can be reduced in size and weight.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments and drawings. FIG. 1 is a perspective view showing an embodiment of a sheet material cutting device with a guide according to the present invention, and FIG. 2 is a sectional view of a side surface thereof. First, the movable blade 3 was rotatably supported on the side plate by the support shaft 31. Next, a material for a leaf spring having a thickness of 0.5 mm is prepared, cut into a predetermined length, and the cutout 23 is processed.
The leaf spring 2 was manufactured by bending into a letter shape. One surface of the L-shape of the leaf spring 2 is fixed to the fixed blade 1 as a fixed blade fixing surface 21, and then the other surface of the L-shape formed by cutting out the cutout 23 is a fixed portion 22 so that the fixed blade 1 is movable. It was fixed to the base plate 4 so as to be pressed against the blade 3. The fixed blade was 2 mm thick and 10 mm wide. The size of the cutout 23 is appropriately determined according to various conditions such as the size of the cutting device and the material of the sheet material to be cut so that the pressing force of the fixed blade 1 against the movable blade 3 becomes an optimum value. Good. Using the sheet material cutting device manufactured as described above, a cutting test of the paper wound in a roll shape was performed. The inside of the winding is the fixed blade side
When the paper was fed out (downward) and the paper passed through, no phenomenon that the leading edge of the paper was caught was recognized at all, and the width of the paper was 10
It was possible to cut the paper by smoothly passing the plane 11 of the fixed blade having a thickness of mm. In the present invention, the fixed blade 1 is fixed to a surface such that the longitudinal direction of one surface of the L-shaped leaf spring is parallel to the axis of the movable blade. If it has a structure that can advance and retreat, it is possible to freely adjust the engagement and press contact force between the fixed blade and the movable blade,
Further smooth cutting is possible.

[0007]

According to the present invention, in a sheet cutting apparatus having an oscillating fixed blade, a means for supporting the fixed blade and a means for pressing the fixed blade against the movable blade are formed on an L-shaped leaf spring. The flat plate-shaped fixed blade also serves as a guide function, so that the sheet material, which is the material to be cut, is smoothly advanced to prevent the sheet material from jamming. As a result, the number of parts can be significantly reduced, so that the number of assembling steps can be reduced, and a high-quality and low-cost sheet material cutting device with a guide can be supplied.

[Brief description of the drawings]

FIG. 1 is a partially sectional perspective view showing an embodiment of a sheet material cutting device with a guide according to the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a sheet material cutting device with a guide according to the present invention.

FIG. 3 is a perspective view showing an example of a conventional cutting device.

FIG. 4 is a perspective view showing another example of a conventional cutting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed blade 11 Flat surface 2 Leaf spring 21 Fixed blade fixed surface 22 Fixed part 23 Cutout 3 Movable blade 31 Support shaft 4 Base plate 5 Guide plate

Continuation of the front page (56) References Japanese Utility Model 1-99590 (JP, U) Japanese Utility Model 63-197093 (JP, U) Japanese Utility Model 61-64993 (JP, U) Japanese Utility Model 61-58092 (JP) , U) Japanese Utility Model Hei 3-113796 (JP, U) Japanese Utility Model Application Showa 57-63696 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B26D 1/38

Claims (1)

(57) [Claims] A movable blade having a support shaft rotatably or swingably supported, a plate having an L-shape, a fixed blade fixed to one surface of the L-shape and the other surface fixed to a base plate; A spring, and the fixed blade having a flat plate shape and fixed to one surface of the leaf spring; the fixed blade is urged by the leaf spring so as to press against the movable blade; The leaf spring is fixed to the base plate so that the surface is parallel to the traveling direction of the sheet material, and the plane of the fixed blade guides the sheet material.