JPS6015353A - Cutter device for roll paper - Google Patents

Abstract

PURPOSE:To improve cutting property while compacting the whole device by constituting a cutting member from fixed blade made of a rigid body and a wire to tighten the wire only when it contacts the fixed blade. CONSTITUTION:A sheet of paper 2 supplied from a roll paper body 1 is clamped by a feed roll 3 and a pinch roll 4 to be supplied and cut off in a predetermined length by a cutter device as the feed roll 3 is rotated. In this case, a cutter device is constituted from a fixed blade 6 secured fixedly to a cutter base 5 and a cutting wire 7 having one end fixed to said base 5 and the other end freely lowered. One end 9 of the wire 7 is secured fixedly to a cam 10 with a set screw 16 and the cam 10 is connected to a shaft 13 of a motor 14. Thus, the wire 7 is tightened for cutting by the rotation of the cam 10 driven by the motor only when the wire contacts the fixed blade 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cutter device for cutting paper into a desired length in a copying machine or the like that uses roll paper.

(Prior Art) In general, there are four methods for cutting paper, as shown in Fig. 1 (N to (D)). 9 paper 2 by moving up and down
The guillotine method cuts the paper 21, the rotary one-type method cuts the paper 21 by rotating the movable blade 23 relative to the fixed blade 22 as shown in Figure (B), and the rotary type shown in Figure fC1. As shown in FIG. There is a one-sided slitter designed to cut.

All of the above four methods are basically constructed by combining two blades, and their cutting speed, cutting amount (the amount of processing per one blade movement), and how the paper is used after cutting (paper The method of use is selected depending on the method (such as slop, paris, etc.). For example, if you are cutting a large amount of paper, use the guillotine method, if you want to cut a small amount of paper but want to make the mechanism more compact, use the slitter single-type or slide method, which is relatively compact and can process medium amounts of paper. In addition, when low driving energy is required, a rotary type is adopted.

However, in the conventional methods described above, the blades used in each method are fixed blades,
Even the blade on the moving side is generally extremely expensive, and if a foreign object such as a metal piece gets into the blade, the cutting edge is easily damaged, making it necessary to replace the blade.

In addition, when replacing the blades, the relative position of the blade edges is extremely delicate; for example, if the gap between the blades is too large, the cut surface of the paper will not be clean, and the paper will not be cut cleanly. It is not easy to adjust the cutting edges to the optimum position, as this will cause more "galling" and irreversible damage to the cutting edges.

(Object of the Invention) The object of the present invention is to solve the above-mentioned drawbacks of the conventional system, to be inexpensive and relatively compact, and to be easy to replace when damaged, and at low cost. It is an object of the present invention to provide a roll paper cutter device which is extremely simple to replace and adjust and can be easily set even if it is installed at a customer's site. It consists of two canting members, one of which is a tensioned cutting wire,
To provide a device which can prevent a cutting wire from elongating due to creep phenomenon and cause the sharpness to change, and which can cut with clean cutting margins.

(Structure of the Invention) The roll paper cutter device of the present invention cuts paper that is supplied from the roll paper main body and is in a tensioned state by single-handedly moving two cutting members arranged facing each other. In this roll paper cutter device, one cutting member is a fixed blade made of a rigid body, and the other cutting member is composed of a canting wire, and the cutting wire is in contact with the fixed blade. The cutting wire is configured to be tensioned only occasionally, and the cutting wire includes one end of the cutting wire that is fixed and the other end of the cutting wire that is movable.

In this way, the cutting wire is tensioned only when cutting, so the wire will not stretch due to creep and affect its sharpness, and you can still use thin wire to make the cut edge clean. Can be done.

(Example) An example of the present invention will be described based on the drawings from FIG. 2 onwards.

In FIG. 2, the paper 2 fed by the roll paper main body 1 is in a standby state, being sifted by the feed roll 3 and the pinch roll 4, and paper feeding is started by rotating the feed roll 3 in response to an external signal. After supplying a certain amount, the feed roll 3 is stopped and the cutter is operated to cut the paper into a desired length, thereby automatically obtaining cut paper.

The cutter device according to the present invention has a fixed blade 6 fixed to a cutter base 5, and a cutting wire 7 whose one end is fixed to the cutter base 5 and whose other end is arranged to descend. The cutting wire 7 is tensioned only when it comes into contact with the fixed blade 6.

To explain this configuration in detail, the cutting wire 7 has end terminals 8 and 9 caulked to both ends thereof.
An end terminal 8 on one end side is fixed to one side of the cutter base 5 with a set screw 15, and an end terminal 9 on the other end side.
is fixed to a cam 10 disposed on the other side of the cutter base 5 with a set screw 16. The cam 10 is fixed to a shaft 13 supported by brackets 11, 12 fixed to the cutter base 5, and the shaft 13 is directly connected to a motor 14. 17.18 is bracket)1
1. This is a set screw that secures 12.

The relationship between the cutting wire 7 and the cam 1o will be described as follows based on FIGS. 3 and 4.

The cam 10 rotates in the direction of the arrow when the motor 14 is rotated by an external signal, but the rotation angle θl of the cam 1o is θi=Q° when it is at the home position, and the cutting wire 7 is in a loose state. When the canting wire 7 rotates and approaches the cutting state, and θl becomes dog, a tensile force commensurate with the lift amount of the cam 10 is applied to the cutting wire 7, and the canting wire 7 and the fixed blade 6 come into contact. At θi-θ″cs just before, full tension is applied to the cutting wire 7 and the cutting wire 7 and fixed blade 6 come into contact with each other until the paper is completely pressed, that is, θ1-θcs to θc.
At step e, the full tension is maintained.

After cutting is completed, rotate the motor 14 in reverse and cam 1
0 and reaches the home position of θi=0°, the tension ν' of the cutting wire 7 is removed and the device enters a standby state.

(Effects of the Invention) According to the roll paper cutter device of the present invention, in a configuration in which paper that is supplied from the roll paper main body side and is in a tensioned state is cut by two cutting members disposed oppositely, one of the cutting members is cut. Since the cutting member is a fixed blade made of a rigid body, and the other cutting member is made of a cutting wire, the mechanism is extremely simple and can be constructed compactly.Moreover, since cutting is performed using the wire, it is inexpensive. At the same time, there is no need to worry about damage to the cutting edge as with conventional wires, and even if the wire breaks, it can be replaced easily and at low cost.Even when replacing the wire, it is necessary to adjust the position of the cutting edge, etc., as in conventional wires. There are some effects that can be easily achieved.

In particular, in the present invention, the cutting wire is configured to be tensioned only when it comes into contact with the fixed blade, so it is possible to prevent the wire from stretching due to creep phenomenon and losing its sharpness. Because it can be used, the cut edges of paper can be made sharp and clean.

Furthermore, the advantage of using thin wires is that the overall mechanism does not require much rigidity, and the structure can be made compact.

[Brief explanation of the drawing]

FIG. 1 (7! to CD+ are perspective views showing a conventional one-type roll paper cutter; FIGS. 2 to 4 show an embodiment of a roll paper cutter device according to the present invention; FIG. 2 is a perspective view) , Fig. 3 is an explanatory diagram showing the relationship between the cam and the cut ink wire, and Fig. 4 is a front view of the same as above. 1: Roll paper main body, 2: Paper, 3: Feed roll 4,:
Pinch roll 5: cutter base 6: fixed blade, 7: cutting wire 8.9: end terminal, 10: cam 11.12 nib bracket, 13: shaft 14: motor 1 (A) (C) CB) 2 j ( D)

Claims (1)

[Claims] 1. A cutter device for roll paper that cuts paper in a tensioned state supplied from the roll paper main body side by relative movement of two cutting members disposed facing each other. One of the cutting members is a fixed blade such as a rigid body, and the other cutting member is composed of a cutting wire, and the cutting wire is configured to be tensioned only at the time of contact with the fixed blade. A roll paper cutter device characterized by: 2. The roll paper cutter device according to claim 1, wherein one end of the 2° cutting wire is fixed and the other end is movable.