JPH081511U - Recording paper cutting device - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To improve the cutting performance of recording paper by advancing and retracting the blade edge of a movable blade against the blade edge of a fixed blade, and to reduce the number of parts to achieve a structure. Simplify and reduce costs. A recording paper cutting device of the present invention has a fixed blade that is in a fixed state at the time of cutting, and a substantially V-shaped blade edge made of a spring plate material that is elastically deformed and bent, and the blade edge is formed from both ends. The movable blade that cuts the recording paper by sliding contact with the blade tip of the fixed blade toward the center, the movable blade mount with the insertion hole for the recording paper that holds the movable blade, and the movable blade in the center in the width direction. The movable blade includes a movable blade that bends in a direction in which the portion is convex toward the fixed blade, and a protrusion that is disposed between the movable blade mounting base.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a cutting device, which is disposed on the paper feeding side of a recording device mainly used as a printer of a register and cuts the recording paper.

[0002]

[Prior art]

 An example of this type of cutting device is disclosed in Japanese Patent Application Laid-Open No. 56-95597. In this case, a movable blade is slidably arranged between the fixed blade and the cutter pressing member, and a spring member for pressing the movable blade against the fixed blade is arranged between the movable blade and the cutter pressing member. It is set up. That is, in the case of cutting the recording paper by moving the movable blade forward and backward with respect to the fixed blade, it is necessary to reduce the clearance between the fixed blade edge and the movable blade edge in order to improve the cutting performance. Becomes Therefore, in the above-mentioned conventional one, the spring member is arranged between the movable blade and the cutter holder.

[0003]

[Problems to be solved by the device]

 However, when the spring member is provided between the movable blade and the cutter pressing member, not only the number of parts is increased, but also the number of assembling steps is increased and the cost is increased accordingly. In view of the above-mentioned conventional problems, this invention improves the cutting performance of recording paper by advancing and retracting while contacting the blade edge of the movable blade with the blade edge of the fixed blade, and also reduces the number of parts. The objective is to simplify the structure and reduce costs.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a fixed blade that is in a fixed state at the time of cutting, and a movable blade made of a spring plate material that is elastically deformed and bent by cutting the recording paper by sliding contact with the fixed blade. , A movable blade mount with a recording paper insertion hole to hold the movable blade, a movable blade that bends the movable blade in a direction in which the widthwise center of the movable blade is convex toward the fixed blade, and a movable blade mount The movable blade is characterized in that it is driven while contacting the blade edge of the fixed blade from both ends toward the center when cutting the recording paper. In the cutting device configured as described above, when the movable blade moves back and forth with respect to the fixed blade, the movable blade bends in a curved shape due to the protrusion, and the elastic force of the bending causes the blade edge of the movable blade to move. By advancing from both ends toward the central part while making contact with the blade edge of the fixed blade without any gap, the recording paper is cut satisfactorily from both edges in the width direction toward the central part and without cutting failure. .

[0005]

[Embodiment of device]

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 5, which is a side view of a recording device used as a register printer, a paper storage unit for storing the roll-up recording paper 5 in a replaceable manner is provided on the rear side of the main body 1. A paper holder 3 equipped with 2 is mounted. A free roller 6 for guiding the drawn-out portion 5a of the recording paper 5 is rotatably disposed above the rear side surfaces of the left and right side frames 4 of the main body 1. Further, inside the main body 1, there are provided guide plates 7, 8, 9, 10 for forming a paper guide passage 14 for the drawn-out portion 5a of the recording paper 5 and a predetermined number of louvers 11, 12, 13. It is arranged. A platen 15 and a print head 16 are disposed in the middle of the paper guide passage 14 so as to face each other with a gap in which the drawer portion 5a of the recording paper 5 is inserted. A pair of drive and driven pair feed rollers 17 and 18 for pulling out and transporting the pull-out portion 5a of the recording paper 5 is disposed downstream of the platen 15 and the print head 16 in the paper feeding direction. ing.

On the exit side of the paper guide passage 14, the recording head 5 is subjected to predetermined recording and is fed out by the pair of paper feed ports 17 and 18 to feed out the recording paper 5 b. A cutting device 20 is provided for cutting. In the cutting device 20, the mounting substrate 21 is laid across the upper ends of the left and right side frames 4 of the main body 1. As shown in FIGS. 2 and 3, a movable blade mounting base 22 is mounted on one side of the upper surface of the mounting board 21 by means of a screw or the like. As shown in FIG. 4, the mounting substrate 21 and the movable blade mounting base 22 are provided with slit-shaped insertion holes 23 through which the feeding portion 5b of the recording paper 5 is inserted. As shown in FIGS. 1 and 2, a fixed blade 24 having a cutting edge is fixedly attached to the mounting surface 22a on the upper surface of the movable blade mounting base 22 along the front side of the insertion hole 23. In this embodiment, the fixed blade 24 has its longitudinal edges in contact with the inner surfaces of both side walls 22b of the fixed blade mount 22 and the central portion of the fixed blade 24 is fixed by a screw 25 and a spacer 26. It is tightened in a state of being lifted from the mounting surface 22a by a predetermined height. Then, as shown in FIG. 4, a gap is set between the mounting surface 22a and the fixed blade 24 so that the movable blade 27 is inserted so as to be movable back and forth.

A movable blade 27 corresponding to the fixed blade 24 is disposed on the mounting surface 22 a of the movable blade mounting base 22 behind the insertion hole 23 so as to be movable back and forth. The movable blade 27 is formed by punching a thin spring plate material that is elastically deformed and bent by a press. Then, at the front end of the movable blade 27, as shown in FIGS. 1 and 2, in order to sequentially cut the feeding portion 5b of the recording paper 5 from both side edges in the width direction toward the central portion, A blade edge having a substantially V shape in a plan view is formed. Further, at the front end of the movable blade 27, guide pieces 28 that are inserted into the gap between the mounting surface 22a of the blade mounting base 22 and the fixed blade 24 are extended at both left and right edges of the blade edge. There is. As shown in FIG. 2, the movable blade 27 is always urged in the backward direction by the return spring 31, and its blade edge is arranged at the standby position where it faces the blade edge of the fixed blade 24 with the insertion hole 23 in between. . Further, the movable blade 27 is advanced toward the fixed blade 24 by the operating lever 32. Further, since the movable blade 27, which has finished cutting the feeding portion 5b of the recording paper 5, is in contact with the cut surface of the recording paper 5 on the pulling-out portion 5a side, the insertion hole 23 is pulled out when retracting to the standby position. It has the effect of suppressing the rising of the tip of 5a. The insertion hole 23 is particularly effective in preventing the recording sheet 5 from being lifted up when the movable blade 27 is retracted to the standby position after the partial described later.

As shown in FIGS. 2 and 3, the operating lever 32 is rotatably mounted on the upper surface of the mounting substrate 21 at the central portion in the longitudinal direction with the pivot pin 33 as a fulcrum. One end of the actuating lever 32 is connected to the tip of the plunger 35 of the first electromagnetic solenoid 34 by a pin 36 and a laterally elongated hole. The other end of the actuating lever 32 is connected to the rear part of the movable blade 27 by a connecting pin 37 and a connecting hole 38 that is long in the lateral direction. When the flanger 35 is pulled in by the excitation of the first electromagnetic solenoid 34, the operating lever 32 is rotated counterclockwise in FIG. 2 with the pivot pin 33 as a fulcrum to move the movable blade. 27 is advanced to the full cut position as shown in FIG. 6 against the urging force of the return peg 31.

Further, in this embodiment, the connecting pin 37 also functions as a guide member for preventing the rear portion of the movable blade 37 from rising, as shown in FIGS. 1 and 4. The connecting pin 37 is a step pin. The large-diameter portion 37a of the connecting pin 37 is fitted into a connecting hole 38 formed through the other end of the actuating lever 32, and is prevented from coming off by an E ring 39. Further, the small-diameter portion 37b of the connecting pin 37 penetrates the connecting hole 40 formed in the rear portion of the movable blade 27 and the longitudinal hole 41 formed in the tool mount 22 in the front-rear direction, and the tip of the small-diameter portion 37b. The nut 42 is fastened to the portion via a washer. Then, by tightening the nut 42, the rear portion of the movable blade 27 comes into contact with the mounting surface 22a of the movable blade mounting base 22 and is moved back and forth.

As shown in FIGS. 1 and 4, the movable blade 27 is bent between the mounting surface 22a of the movable blade mounting base 22 and the movable blade 27 so that the blade edge of the movable blade 27 becomes the blade edge of the fixed blade 24. A convex portion 29 is formed for advancing and retracting while making contact. In this embodiment, the convex portions 29 are formed by press working or the like at a total of three positions, that is, the central portion in the width direction and the left and right portions of the mounting surface 22a of the blade mounting base 22.

In addition, in this embodiment, in order to selectively perform the full cut for cutting the feeding portion 5b of the recording paper 5 over the entire width direction and the partial cut for cutting a part thereof, Notched grooves 30 are formed at the central portion of the tip of the movable blade 27 and a total of three locations on the right and left sides thereof. Further, in order to limit the rotation angle of the operating lever 32 by the first electromagnetic solenoid 34 and stop the movable blade 27 at the partial cut position before the full cutting position, the movable blade 27 can be brought into and out of contact with the operating lever 32. Partial stoppers 42 are provided at the opposing positions. As shown in FIGS. 2, 3 and 5, the partial stopper 43 is rotatably attached to the side frame 4 with a support pin 44 as a fulcrum, and one end of the partial stopper 43 is a plunger of the second electromagnetic solenoid 45. It is connected to the pin 46 by a long hole. Further, at the other end of the partial stopper 43, a stopper piece 43a extending toward the rear of the operating lever 32 through an opening window penetrating the mounting substrate 21 is formed. When the plunger 46 is pulled in by the excitation of the second electromagnetic solenoid 45 and the partial stopper 43 is rotated clockwise in FIG. 5, the stopper piece 43a of the partial stopper 43 is moved to the operating lever 32. The operation lever 32 is disposed in a partial position that limits the rotation angle of the operation lever 32. Further, when the second electromagnetic solenoid 45 is not excited, the partial stopper 43 is arranged at a retracted position in which the stopper piece 43a is retracted outside the rotational locus position of the operating lever 32 by the biasing force of the spring. It has become so.

In this embodiment configured as described above, the pull-out portion 5a of the recording paper 5 is intermittently moved by the paper feed action of the pair of feed rollers 17 and 18 by an amount corresponding to the print line pitch. When the intermittent transfer of the feed ports 1 and 17 is stopped, the print head 16 records on the drawn-out portion 5a of the recording paper 5. Then, when the pull-out edge of the recording paper 5 is fed by a predetermined length from the insertion hole 23 of the cutting device 20, the feeding portion 5b is cut by the fixed blade 24 and the movable blade 27. When the feeding portion 5b of the recording paper 5 is cut, when the feeding portion 5b is fully cut, the second electromagnetic solenoid 45 is in a non-excited state and the partial stopper 43 is arranged in the retracted position. In this state, the first electromagnetic solenoid 34 is excited and the plunger 35 thereof is retracted. Then, the operating lever 32 is rotated counterclockwise around the pivot pin 33 as a fulcrum, which causes the movable blade 27 to move toward the fixed blade 24 against the biasing force of the return spring 31, as shown in FIG. It is advanced toward the full cut position.

As shown in FIG. 4, the movable blade 27 is bent in a curved shape by the convex portion 29, and the elastic force of the bending causes the guide change 28 of the movable blade 27 to move to the lower side of the fixed blade 24. Upon contact, the blade edge of the movable blade 27 is curved in a convex shape upward of the fixed blade 24. As a result, the blade edge of the movable blade 27 is advanced from both ends toward the center while contacting the blade edge of the fixed blade 24 without any gap. Then, the movable blade 27 is advanced to the full cut position, so that the feeding portion 5b of the recording paper 5 is sequentially cut and separated from both lateral edges of the recording paper 5 toward the central portion. In this way, the cutting performance of the recording paper 5 can be improved by advancing the blade edge of the movable blade 27 while making contact with the blade edge of the fixed blade 24 without a gap.

Further, the blade edge of the movable blade 27 has a substantially V shape in a plan view, and the feeding portion 5b of the recording paper 5 is sequentially cut from both side edges in the width direction toward the center portion, thereby recording. The cutting force can be reduced and the sharpness can be improved as compared with the case where the entire width of the paper 5 is cut at the same time. When the movable blade 27 is advanced to the full cut position, the first electromagnetic solenoid 34 is in a non-excited state. Then, the movable blade 27 is retracted to its original position by the elastic force of the spring built in the first electromagnetic solenoid 34 and the return spring 31 of the movable blade 27, whereby the recording paper 5 is fully cut. One cycle is completed. When the delivery portion 5b of the recording paper 5 is partially cut, the second electromagnetic solenoid 45 is excited and the plunger 46 thereof is retracted. Then, the partial stopper 43 is rotated in the clockwise direction in FIG. 5 about the pin 47 as a fulcrum, and the stopper pieces 43a of both the partial stoppers 43 are arranged at the partial position where they are projected into the rotation locus of the operating lever 32. .

Here, when the first electromagnetic solenoid 34 is excited, as shown in FIG. 7, the operating lever 32 is rotated about the pivot pin 33 as a fulcrum to a position where it abuts on the stopper piece 43a. . As a result, the movable blade 27 is advanced to and stopped at the partial cut position before the full cut position. Therefore, the feeding portion 5b of the recording paper 5 is partially cut, leaving a portion corresponding to the portion of the cutout groove 30 formed at the blade edge of the movable blade 27. Although the partial stopper 43 is provided in the above-described embodiment so that the full cut and the partial cut are selectively performed, the present invention is not limited to this, and the partial stopper 43 may be provided if necessary. Good.

[0016]

[Effect of device]

 As described above, according to the present invention, the movable blade is bent, and based on the elastic force due to the deflection, the blade edge of the movable blade is moved forward while making contact with the blade edge of the fixed blade without a gap, thereby recording. It is possible to improve the paper cutting performance. The blade edge of the movable blade is V-shaped, and the feeding portion of the recording paper is sequentially cut from both side edges in the width direction toward the central portion, thereby simultaneously cutting the entire width direction of the recording paper. The cutting force can be reduced and sharpness can be improved. In addition, the movable blade is made of a spring plate material, and the elastic force of its deflection causes the movable blade edge to contact the fixed blade edge, so that the movable blade is attached to the fixed blade with a separate spring member. Unlike the trend, the number of parts can be reduced, the structure is simple and the assembly is easy, and the cost can be reduced accordingly.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an essential part of one aspect of the cutting device of the present invention.

FIG. 2 is a plan view of an embodiment of the cutting device of the present invention.

FIG. 3 is a front view of an embodiment of the cutting device of the present invention.

FIG. 4 is a side sectional view of an embodiment of the cutting device of the present invention.

FIG. 5 is a side view schematically showing the entire printer.

FIG. 6 is a plan view showing a state in which the movable blade has advanced to the full cutting position.

FIG. 7 is a plan view showing a state in which a movable blade has advanced to a partial force position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 main body, 2 paper storage unit, 5 recording paper, 15 platen, 20 cutting device 22 blade mount, 23 insertion hole, 24 fixed blade, 2
7 movable blades, 28 guides, 29 convex parts

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nori Hattori 9-35 Hotta-dori, Mizuho-ku, Nagoya, Aichi Prefecture Brother Industries, Ltd.

Claims (1)

[Scope of utility model registration request] 1. A fixed blade which is in a fixed state at the time of cutting and a substantially V-shaped blade edge made of a spring plate material that is elastically deformed and bent, and the blade edge of the fixed blade from both ends toward the center. A movable blade that cuts the recording paper by sliding contact with it, a movable blade mounting base that has a recording paper insertion hole that holds the movable blade, and a center of the movable blade in the width direction is convex in the fixed blade direction. A recording paper cutting device comprising a movable blade that bends in a direction and a protrusion that is arranged between a movable blade mounting base.