JPH0719746Y2 - Structure of movable or fixed blade of sheet cutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for cutting a sheet material such as paper and film (hereinafter simply referred to as "paper") in a device such as a printer, a copier, and a facsimile. The present invention relates to the structure of a movable blade or a fixed blade of a sheet cutter.

[Conventional technology]

As a sheet cutter for such an application, a rotary cutter composed of a movable blade and a fixed blade, or a guillotine cutter composed of a movable blade and a fixed blade that move up and down has been widely used.

As examples of the former, Japanese Utility Model Publication No. Sho 59-14156 and Japanese Utility Model Publication Sho 61
-154694, and the latter is described in JP-B-58-37594.

In each of these conventional cutters, the movable blade or the fixed blade must be arranged at a position where the cutting edges of the movable blade and the fixed blade mesh with each other in order to shear the paper by combining the movable blade and the fixed blade.

In order to maintain such a positional relationship, the movable blade or the fixed blade is often incorporated in the support member to form a unit. For this reason, when repairing or replacing the movable blade or fixed blade due to wear or chipping of the cutting edge, disassemble the unit or the support member or the movable blade or fixed blade itself, and take out the movable blade or fixed blade. It has a simple structure.

[Problems to be solved by the invention]

If the movable blade or fixed blade wears at the cutting edge due to repeated use, or if the cutting edge is accidentally cut when trying to cut a hard piece such as a metal piece, replace or sharpen the cutting edge. Although it is necessary to remove it from the device for repair, the movable blade or fixed blade whose both ends are pivotally supported must perform this work by once removing the shaft or the supporting member supporting the shaft.

Since the movable blade or the fixed blade has a sharp cutting edge, this work must be performed carefully. Especially Kaikai
As described in Japanese Patent No. 61-154694, a movable blade or a fixed blade in which the spindle itself is incorporated with a screw is very tightly fastened so as not to loosen during use, and further loosening prevention Since the adhesive for is usually used together, the disassembling work is very dangerous and sometimes impossible. In such a case, the movable blade or the fixed blade cannot be repaired or replaced, so that the entire apparatus unit of the sheet cutter must be replaced.

Also, when disassembling the support member that supports the shaft,
The relative positional relationship between the pair of movable blades or the fixed blade must be ensured so that this support member is usually mostly assembled with screws, and when disassembled and reassembled, the movable blades are usually reassembled. Alternatively, it is essential to readjust the positional relationship of the fixed blades.

[Means for solving problems]

The present invention has been studied in order to eliminate the above-mentioned problems of the conventional cutter, and as a result, the shaft is made longer than the longitudinal direction of the cutter to support the movable blade and the fixed blade, and the shaft is attached to one end side of the cutter. It is possible to easily remove the movable blade or fixed blade by pulling it out, and when assembling it in reverse, it is necessary to insert the shaft through both the hole of the movable blade or fixed blade and the hole of the side plate. It is a thing.

More specifically, it is composed of a movable blade and a fixed blade having a holding portion, and a side plate having support holes for rotatably supporting at least one of the movable blade and the fixed blade, and crosses their blade edges. In the structure of the movable blade or the fixed blade of the sheet cutter that shears the sheet material while pressing it, at least one of the movable blade and the fixed blade is provided with a holding hole penetrating in the longitudinal direction of the movable blade or the fixed blade in the holding portion. , The movable blade or fixed blade has a spindle longer than its length,
The structure of a movable blade or a fixed blade of a sheet cutter is characterized in that it is supported by penetrating both the holding hole and the support hole, and is detached by inserting and removing a spindle.

And, the movable blade or the fixed blade is provided with a holding portion projecting in the same direction at right angles to the longitudinal direction at both ends thereof, and the holding portion has a holding hole substantially parallel to the longitudinal direction. The holding portions provided at both ends of the movable blade or the fixed blade have a structure in which a notch is processed to project, a structure in which a substantially block-shaped member is fixed and projected at the end of the movable blade or the fixed blade, or the movable blade. Alternatively, the fixed blade is in the shape of a thin plate and has a structure formed by bending an end portion thereof.

Further, the movable blade or the fixed blade is characterized in that the blade material is fixed to a base metal having holding portions at both ends, the movable blade has a pin hole on at least one end surface, and the side plate has a swinging motion of the pin hole. A driving hole is provided at a position facing the dynamic motion, and the driving force is transmitted through the driving hole to the pin hole to drive the movable force.

That is, the seat cutter of the present invention is provided with a hole penetrating in the longitudinal direction of the movable blade or the fixed blade having a structure in which both ends are axially supported, and a supporting shaft longer than the longitudinal direction of the movable blade or the fixed blade is penetrated together with the side plate. Hold the movable blade or fixed blade,
When the movable blade or the fixed blade is replaced or re-polished, the movable blade and the fixed blade can be easily attached and detached by inserting and removing the support shaft.

[Action]

That is, by adopting the structure of the movable blade or the fixed blade of the sheet cutter of the present invention, when it becomes necessary to remove the movable blade or the fixed blade from the cutter unit, among the members that support the movable blade or the fixed blade, It can be removed simply by pulling out only the support shaft in the longitudinal direction of the movable blade or the fixed blade.

And when re-installing the movable blade or fixed blade,
After arranging the movable blade or fixed blade at a predetermined position, use the shaft that has been removed once, and use this spindle as a support hole for the movable blade or fixed blade and the movable blade or fixed blade. The movable blade or the fixed blade can be easily reassembled by penetrating both ends of the support hole provided in the side plate of the member.

〔Example〕

 Next, the present invention will be described in detail based on embodiments and drawings.

1 to 4 show an embodiment of the present invention. FIG. 1 is a front view showing the overall structure, and FIG. 2 is a side plate 7.
Side view from the side, FIG. 3 is a side view from the side plate 10 side, and FIG.
The figure is a cross-sectional view at the PP position shown in FIG.

Both the fixed blade 1 and the movable blade 2 have holding holes 1b and 2b penetrating in the longitudinal direction, and the supporting blades 3 and 4 longer than the movable blade 2 and the fixed blade 1 axially support the side plates 7 and 10. Has been done. Support shaft 3,4
Penetrates both the holding holes 1b, 2b and the support holes 7a, 10a provided in the side plates 7, 10 and projects to the outside of the side plates 7, 10. The spring 6 for pressing the blade edge of the fixed blade 1 against the movable blade 2 is arranged coaxially with the support shaft 3 of the fixed blade 1.

Both the support shafts 3 and 4 have stepped portions inside the side plate 7 to prevent them from falling off, and E
The die retaining rings 8 and 9 prevent the longitudinal movement and the falling of the die retaining rings.

In the sheet cutter having such a structure according to the present invention, when repairing or replacing the movable blade or the fixed blade, the E-shaped retaining ring 8 or 9 is removed and the spindle 3 or the spindle 4 is pulled out to the right in FIG. As a result, the fixed blade 1 or the movable blade 2 can be easily and safely removed from the side plates 7 and 10.

Moreover, at this time, since the positional relationship between the left and right side plates 7 and 10 which are fixed to the casing 5 and support the movable blade or the fixed blade remains fixed, when the movable blade or the fixed blade is assembled again, It is not necessary to readjust the positional relationship between the fixed blade 1 and the movable blade 2. Furthermore, it is not necessary to replace the support shafts 3 and 4,
It can be used again.

If the movable blade 2 or the fixed blade 1 has such a structure and the movable blade 2 or the fixed blade 1 can be easily taken out only by pulling out the support shafts 3 and 4, the movable blade 2 or the fixed blade 1 and the support shaft 3 , 4 and must rotate freely.

In that case, even if the driving force for driving the movable blade 2 is transmitted to the support shaft 4, the movable blade 2 cannot be driven, so the driving force must be directly transmitted to the movable blade 2.

An example of a method for directly transmitting the driving force to the movable blade 2 is shown in FIG. A pin hole 2a is provided on the end surface of the movable blade 2, and the swing of the pin hole is centered on the support shaft 4. And
The side plate 10 is provided with a drive hole 10a at the same position as the swing of the pin hole 2a.

A movable blade can be driven by providing a pin on a swinging part of a drive source (not shown) and inserting the pin into the pin hole through the drive hole 10a.

FIG. 5 shows another embodiment of the present invention. Fixed blade 11 and movable blade 12 have a notch at the center in the longitudinal direction of the blade.
13 and 14 are machined to form a recessed portion, and holding portions 11a and 11b protruding at both ends of the blade are provided, and holding holes 11b and 1 are provided in these holding portions.
2b is processed.

With such a structure, it is possible to separately machine the holding holes that penetrate the movable blade or fixed blade in the longitudinal direction, especially when the movable blade or fixed blade has a long length. Alternatively, since it is not necessary to machine a deep hole over the entire length of the fixed blade, the holding hole can be easily machined.

FIG. 6 shows still another embodiment of the present invention, in which the fixed blade 15 and the movable blade 16 are holding members each having a block-like member protruding from both ends.
It is fixed as 15a and 16a, and holding holes 15b and 16b of movable blades or fixed blades are formed in this holding portion.

With such a structure, since it is not necessary to provide a through hole in the movable blade or the fixed blade itself, it is possible to configure the movable blade or the fixed blade with a relatively thin plate and reduce the weight of the sheet cutter. Can also contribute.

FIG. 7 shows still another embodiment of the present invention. Fixed blade 17 and movable blade 18 are composed of thin plates,
Bend both ends to hold parts 17a, 18a, and hold holes 1
7b and 18b are provided to hold the movable blade or the fixed blade.

With such a structure, it is not necessary to machine the movable blade or the fixed blade or the holding hole by machining, and it is possible to manufacture the movable blade or the fixed blade only by press working. It is also effective in lowering prices.

Since the movable blade or the fixed blade having this structure has a relatively low hardness because it is pressed, wear resistance can be improved by fixing a blade material having a high hardness at a predetermined position depending on the situation.

FIG. 8 shows still another embodiment of the present invention. A holding portion 21a is provided and a holding hole 21b is formed in this. A movable blade or a fixed blade is formed by fixing a blade material 19 made of a thin plate to a base metal 21.

[Effect of device]

As described above, according to the structure of the movable blade or the fixed blade of the sheet cutter according to the present invention, the work of attaching and detaching the movable blade or the fixed blade from the support member in the cutter device can be performed extremely easily and safely. , Repair work due to malfunction of movable blade or fixed blade can be done easily.

For this reason, when a problem occurs with the movable blade or the fixed blade, it is not necessary to replace the entire sheet cutter for each unit,
Since only the movable blade or the fixed blade needs to be taken out for repair, the sheet cutter can be repaired easily and at low cost.

Furthermore, even if the movable blade or fixed blade is made of a relatively inexpensive material with low wear resistance and low hardness, if a problem occurs in the movable blade or fixed blade, replace the movable blade or fixed blade as necessary. Alternatively, since re-polishing can be easily performed, it is not necessary to incorporate a movable blade or a fixed blade, which is more expensive and more durable than in the past, and there is an effect that the sheet cutter can be made inexpensive as a whole.

[Brief description of drawings]

1 is a front view showing a first embodiment of the structure of a movable blade or a fixed blade of a sheet cutter according to the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a left side of FIG. Fig. 4 is the first view
FIG. 5 is a cross-sectional view of the P-P part of the figure, FIG. 5 is a perspective view showing the structure of the movable blade or the fixed blade of the second embodiment of the present invention, and FIG. 6 is the movable blade of the third embodiment of the present invention. FIG. 7 is a perspective view showing the structure of a fixed blade, FIG. 7 is a perspective view showing the structure of a movable blade or a fixed blade of the fourth embodiment of the present invention, and FIG. 8 is a movable blade of the fifth embodiment of the present invention. It is a perspective view which shows the structure of a fixed blade. 1,11,15,17: Fixed blade, 2,12,16,18: Movable blade, 3,4: Spindle, 5:
Enclosure, 6: Spring, 7, 10: Side plate, 8, 9: E type snap ring, 13, 14: Notch, 19: Blade material, 20: Screw, 21: Base metal

Claims (5)

[Scope of utility model registration request] 1. A movable blade having a holding portion and a fixed blade, and a side plate having a support hole for rotatably supporting at least one of the movable blade and the fixed blade at both left and right ends, and the blade edges are cross-pressed to each other. In the structure of the movable blade or the fixed blade of the sheet cutter that shears the sheet material while at the same time, at least one of the movable blade and the fixed blade is a holding hole that penetrates the holding portion in the longitudinal direction of the movable blade or the fixed blade. The movable blade or the fixed blade has a support shaft longer than its length supported by penetrating both the holding hole and the support hole, and detachable by inserting and removing the support shaft. The structure of the movable or fixed blade of the sheet cutter. 2. The movable blade or the fixed blade is provided at both ends thereof with holding portions projecting at right angles to the longitudinal direction and in the same direction, and the holding portions have holding holes substantially parallel to the longitudinal direction. The structure of the movable blade or the fixed blade of the sheet cutter according to claim 1 of the utility model registration. 3. The holding portions provided at both ends of the movable blade or the fixed blade have a structure in which a notch is formed in the movable blade or the fixed blade to project the cutout, and a generally block-shaped member is provided at the end of the movable blade or the fixed blade. The sheet according to claim 1, characterized in that it is a structure that is fixed and protrudes, or that the movable blade or the fixed blade has a thin plate shape and is formed by bending an end portion thereof. The structure of the movable or fixed blade of the cutter. 4. The movable blade of a seat cutter according to claim 1, wherein the movable blade or the fixed blade is formed by fixing a blade material to a base metal having holding portions at both ends. Fixed blade structure. 5. The movable blade has a pin hole on at least one end surface, the side plate is provided with a drive hole at a position opposed to the swinging motion of the pin hole, and the driving force passes through the drive hole and The structure of a movable blade or a fixed blade of a sheet cutter according to claim 1, characterized in that the movable blade is driven by being transmitted to the pin hole.