JPH0392297A - Burster - Google Patents

Abstract

PURPOSE:To bring a cutting off edge surely into contact with sewing machine stitches and cut off a continuous paper sheet easily and with small force, by providing a pair of paper sheet pressors which are retained so as to advance/retreat freely in a cutting off edge cutting-in direction at confronting positions with the cutting off edge of a plate shape placed between them and whose inclined surfaces that go into a recessed portion are formed on a cutting off edge surface side. CONSTITUTION:Transport rollers 4, 5 are stopped, and they together with paper sheet pressors 13, 14 give tensile force to a continuous paper sheet 1 while the slip of the paper sheet 1 is being allowed by means of paper sheet pressors 13, 14. At this time, the paper sheet 1 is bent into dogleg form at a sewing machine stitches part 1a. On this occasion, in the case of sewing machine stitches 1a being shifted to the upper stream side than a cutting off edge 11, there occurs more slip between the paper sheet 1 and the upper stream side transport rollers 4. As a result, under a condition in which the paper sheet 1 is press-welded to the recessed portion 8 of a guide plate 2 by means of paper sheet pressors 13, 14, sewing machine stitches 1a can be positioned at the center of the recessed portion 8. As a result, the paper sheet 1 can be easily cut off by bringing the cutting off edge 12 into contact sewing machine stitches 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a burster for cutting continuous paper along its perforations.

2. Description of the Related Art Conventionally, as shown in FIG. 6, a pair of pressing bodies 53 that sandwich the continuous paper 1 are provided between a plurality of conveyance rollers 51 and 52 that sandwich the continuous paper 1. The continuous paper l is conveyed to the left by the conveyance roller 52 on the upstream side.
Patent Publication No. 57-2 17 discloses an invention in which the continuous paper l is pulled to the left and cut from the perforation line 1a by stopping the transport roller 51 and driving only the downstream conveyance roller 51.
It is described in Publication No. 54.

Further, as shown in FIG. 7, two guide members 54 and 55 supporting the continuous paper l are provided so as to be able to approach and separate from each other,
Pressing bodies 56 and 57 for pressing the continuous paper l are rotatably connected to these guide members 54 and 55 in an X-shape, and when these pressing bodies 56 and 57 are lowered to press the continuous paper l, Japanese Patent Publication No. 57-50666 discloses an invention in which the continuous paper 1 is cut from the perforation 1a by displacing these pressing bodies 56, 57 together with the guide members 54, 55 in the direction of separation and pulling the continuous paper 1. It is stated in the official gazette.

Further, as shown in FIG. 8, a cylindrical conveyance roller 58
The continuous paper 1 is held between the rollers 58 and 59, and the continuous paper 1 is held by the conical conveyance roller 59 located on the downstream side thereof, and the continuous paper 1 is conveyed by both the conveyance rollers 58, 59, By stopping the paper and driving only the downstream conveyance roller 59, the continuous paper l is pulled to the left, and due to the difference in circumferential speed between both ends of the conical conveyance roller 59,
Japanese Patent Publication No. 59-359 discloses an invention in which continuous paper 1 is sequentially cut from one end of perforation 1a.

Further, as shown in FIG. 9, the continuous paper 1 that has been conveyed a certain distance is pressed against the paper guide 61 by the pressing body 60, and the continuous paper 1 is pressed against the roller 63 rotating in one direction by the pressing body 62. At this time, by displacing the pressing body 62 in the rotational direction of the roller 63 and pulling the continuous paper 1,
An invention in which continuous paper 1 is cut from perforation 1a is described in Japanese Patent Publication No. 59-360.

Furthermore, as shown in FIG.
52 is stopped, and in this state, the continuous paper 1 is pressed against the guide plate 64 by a plurality of pressing bodies 66 facing each other with a cutter 65 in between, and the cutter 65 is lowered to cut the continuous paper 1 from the perforation 1a. The invention that made it into
It is described in Publication No. 59.

Problems to be Solved by the Invention The inventions shown in FIGS. 6 to 9 all have a structure in which the continuous paper l is torn and cut by pulling.
At the time of this cutting, the continuous paper l must be pulled strongly to be cut. Therefore, not only a large driving force is required, but also the force for holding the continuous paper 1 must be greater than the tearing force, which has the disadvantage that a structure for firmly holding the continuous paper 1 is required.

Furthermore, the invention shown in FIG. 10 has a drawback in that it is difficult to always position the perforation 1a directly below the cutter 65 because of manufacturing variations in the length of the continuous paper 1. There; perforation 1a from just below the cutter 65
If the continuous paper l is misaligned, either the continuous paper l will not be cut, or tension will be applied by the pressing force of the cutter 65, and the continuous paper l will be cut from the perforation line 1a by the tension. Therefore, in the latter case, like the inventions shown in FIGS. 6 to 9, not only a large driving force is required, but also the continuous paper
This results in the inconvenience that a structure for firmly holding the material is required.

Means for Solving the Problems The invention as set forth in claim 1 forms a V-shaped inclined recess and an opening located at the bottom of this recess in a guide plate that supports perforated continuous paper. A plurality of conveyance rollers that sandwich the continuous paper are arranged along the conveyance direction of the continuous paper, and a plate-shaped cutting blade and the cutting blade are held at opposing positions in between so that they can move forward and backward in the cutting direction of the cutting blade. A pair of paper pressers each having an inclined surface that fits into a recess on the side of the blade surface of the cutting blade, and a moving force applying section that applies a force to move the paper press in the direction of the blade surface of the cutting blade. Set up your body,
A cutting blade holding part is provided to hold the cutting blade so as to move forward and backward with respect to the recess, and a cutting blade moving part is provided to give the cutting blade a moving force in the direction toward or away from the guide plate, and the cutting blade holding part is brought into contact with the cutting blade holding part. A cam is provided that moves the cutting blade toward the recess by rotating while contacting the recess.

The invention as set forth in claim 2 provides a cam with a holding portion that maintains a state in which the paper presser of the cutting body contacts the concave portion of the guide plate and the positional relationship between the paper presser and the cutting blade does not displace from the initial state for a certain period of time. Formed.

Effect: In the invention described in claim 1, the continuous paper is guided by the guide plate and conveyed by the conveyance roller. When tearing the continuous paper at a perforation, the perforation is positioned on a straight line connecting the center of the recess of the guide plate and the blade surface of the cutting blade, and the continuous paper is stopped.

In this state, when the cam is rotated to move the cutting blade holder toward the recess of the guide plate, the paper presser first fits into the recess. At this time, the continuous paper slips on the conveyance roller because it is pressed by the paper presser, is bent at the perforation, and is pulled out into the recess. Moreover, even if the perforation is slightly displaced from the position facing the cutting edge of the cutting blade, the perforation can be moved to the center of the recess in the process of pressing the continuous paper with the paper presser. This is because the continuous paper is pressed by the paper presser and bent around the perforation, which causes a difference in the pulling force of the continuous paper against the conveyance rollers on the upstream and downstream sides. Therefore, if continuous paper is pulled out into the recess,
The perforated portion will be bent and protrude outward from the opening.

Then, when the cam rotates further, the cutting blade moves in the opening direction of the recess against the moving force applying section, and cuts the continuous paper from the perforation.

In the invention as claimed in claim 2, since the state in which the paper presser is in contact with the recess and the cutting blade is not displaced relative to the paper presser is maintained for a while, the operation of aligning the perforation with the center of the recess is more reliably performed. Become.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 5. As shown in FIG. 2, a guide plate 2 and another guide plate 3 support the continuous paper 1 with perforations la formed at equal pitches.
are arranged facing each other with a predetermined gap. At the ends of these guide plates 2 and 3, a detector 2a for optically detecting the leading edge of the continuous paper 1 is provided. Also, continuous paper l
A plurality of conveyance rollers 4 and 5 are provided which are arranged along the conveyance direction and hold the continuous paper 1. The guide plate 2 is located between these conveyance rollers 4 and 5, and has a V-shaped recess 8 having inclined surfaces 6 and 7, and a V-shaped recess 8 located at the bottom of this recess 8. It is shaped like an elongated opening 9 extending in the width direction.

Furthermore, a large opening 10 is formed in the upper guide plate 3, and a cutting body 1l is provided above the opening 10.

Next, as shown in FIG.
2, a paper presser 13, 14, and a moving force applying section 15. In other words, it is flat and has a sharp blade surface 1 at the lower end.
A cutting blade l2 having a diameter 2a is provided, and a long hole l6 is formed in the cutting blade 12 in the vertical direction. on the other hand,
The paper pressers 13 and l4 are a pair of flat members, one paper presser 13 has a shaft 17 with an armor screw oriented horizontally, and the other paper presser 14 has a hole l8. ing. Then, by sequentially inserting the shaft 17 of one paper presser l3 into the long hole l6 of the cutting blade l2 and the hole l8 of the other paper presser l4, and screwing the nut 19 onto the shaft l7, the cutting blade 12 and Paper pressers 13 and 14 are connected to each other so as to be vertically movable. Further, as the moving force imparting section 15, blade side bins 20 are provided vertically below both sides of the cutting blade 12 in the horizontal direction. One paper presser l3, 14
Elongated pin holes 21 through which the blade-side pins 20 are inserted are formed vertically on both sides of the blade, and above these pin holes 21, bins 22 are erected horizontally. has been done. Then, the blade side pin 20 inserted through the bottle hole 2l
A spring 23 is stretched between and the pin 22, and a moving force applying portion l5 is formed therein. In addition, an inclined surface 2 parallel to the inclined surface 6 of the recess 8 is provided on the lower surface of the paper presser 13.
4, and an inclined surface 25 parallel to the inclined surface 7 of the recessed portion 8 is formed on the lower surface of the paper presser 14.

The vertical line passing through the intersection of the extended surfaces of these inclined surfaces 24 and 25 is in a positional relationship with the center line of the cutting blade 1l.

Then, the cutting blade l2 is fully held by the cutting blade holding portion 26. That is, a round-shaped holding rod 27 is fixed to the upper part of the cutting blade 12, and one end of a connecting arm 28 is rotatably connected to both ends of the holding rod 27. The other ends of these connecting arms 28 are rotatably connected to the other ends of attachment arms 29, one end of which is rotatably attached to a main body case (not shown). here,
These connecting arms 28 and mounting arms 29 are connected by connecting pins 30, and this connecting pin 3
A contact portion 30 with which a cam 31, which will be described later, comes into contact with the intermediate portion of the
a is formed.

Next, the other end of a coil spring 32 serving as a cutting blade moving part is attached to the cutting blade 11, one end of which is attached to the bottom of a main body case (not shown).

Furthermore, the cam 31 that comes into contact with the aforementioned connecting pin 30 is
As shown in FIG. 4, it is a plate cam and has a shape that changes the amount of displacement of the driven joint in three stages.

That is, the hold portion 31a is shaped and the maximum radius R
1 to R3, which is the portion of the hold portion 31a, and the minimum radius R. This leads to R. It has a shape that smoothly connects from R to R. Here, the relationship between the rotation angle of the cam 31 as the driving node and the amount of displacement of the contact portion 30a as the driven node is shown in the cam diagram in FIG. Thus, such a cam 31 is attached to both ends of the camshaft 33. A transmission gear 36 that meshes with a drive gear 35 attached to a motor shaft 34a of a drive motor 34 is attached to this camshaft 33 via a spring clutch 37. When the spring clutch 37 is freely rotating, the rotational force of the transmission gear 36 is transferred to the camshaft 3.
The structure is such that the rotational force of the transmission gear 36 is not transmitted to the camshaft 33 when the free rotation thereof is prevented.

Therefore, a stopper 37a is formed on the outer peripheral surface of the spring clutch 37, and a trigger 38 that freely engages with this stopper 37a is provided.

In this configuration, the conveyance rollers 4 and 5 are driven by a motor (not shown), and the continuous paper 1 is conveyed from the right to the left in FIG.

At this time, the trigger 38 is engaged with the stopper 37a of the spring clutch 37, and the driving force of the drive motor 34 is not transmitted to the cam 3l. Further, at this time, the R portion of the cam 31 is in contact with the contact portion 30a, and therefore, the cutting body 11 is located at the uppermost position. When the detector 2a detects the leading edge of the continuous paper 1 being conveyed from right to left, the remoter is stopped by a detection signal from the detector 2a. The timing of this stop is
This substantially coincides with the time when the perforation 1a of the continuous paper 1 reaches a position facing the blade surface 12a of the cutting blade l2.

In such a stopped state of the continuous paper 1, the cutting operation of the continuous paper 1 is performed as follows. First, the stopper 37a is disengaged by the trigger 38, and the spring clutch 37 becomes free to rotate. Then, the rotational force of the drive motor 34 is transmitted to the camshaft 33, and the cam 31 rotates.

The rotation direction of the cam 3l is counterclockwise in FIG. 4. Therefore, the contact portion between the cam 31 and the contact portion 30a shifts from R1 to the R portion of the cam 31, and the contact portion 30a is displaced by that amount, so that the cutting body 11 is moved downward by the coil spring 32. being pulled and descending. As a result, the paper presser 13.14 biased by the spring 23 comes into contact with the continuous paper l first, and its inclined surface 24.25 presses the continuous paper l against the inclined surfaces 6 and 7 of the recess 8. Then, when the cam 3l rotates further, the cam 3
1 and the contact portion 30a is the R.1 of the cam 3l. Move on to the part. Then, only the cutting blade 12 is lowered by being pulled by the coil spring 32, and this cutting blade 12 closes in the opening 9.
Cut the continuous paper l from the perforation 1a while protruding from the perforation 1a. Thereafter, as the cam 3l rotates further, the contact portion between the cam 3l and the contact portion 30a moves to the R portion of the cam 31, and the cutting body 1l returns to its original uppermost position.

Here, the operation of the paper pressers 13 and 14 will be explained.

When the transport rollers 4 and 5 are stopped and the paper presser 13.14 presses the continuous paper l, the transport rollers 4 and 5 apply tension to the continuous paper l together with the paper presser 13.14 while allowing the continuous paper 1 to slip. Grant. At this time, the continuous paper l is bent into a dogleg shape at the perforation 1a.

Therefore, if the perforation 1a is slightly misaligned with respect to the blade surface 12a of the cutting blade L2, the continuous paper 1 can be moved by the paper presser 13.
In the process of pressing against the recess 8 of the guide plate 2 at step 14, the transport rollers 4 disposed upstream and downstream of the perforation 1a
, 5 on the continuous paper 1, and the slip amount also differs between the upstream and downstream sides. Specifically, if the serration la is shifted upstream (to the right) from the cutting blade 11, more slip occurs between the continuous paper 1 and the upstream (right) conveyance roller 4. On the contrary, perforation 1
If a is shifted downstream (to the left) from the cutting blade 11, more slip occurs between the continuous H11 and the downstream (left) conveyance roller 5.

Therefore, when the continuous paper l is pressed against the recess 8 of the guide plate 2 by the paper presser 13, 14, the perforation 1a can be positioned at the center of the recess 8. Therefore, it becomes possible to bring the cutting blade l2 into contact with the perforation 1a and cut the continuous paper l easily and with a small force.

In particular, a hold portion 31a is formed on the cam 3l, and the fifth
As shown in the cam diagram in the figure, the displacement of the abutting portion 30a, which is a driven joint, can be stopped for a while at the R3 portion of the cam 31. That is, this R. At the part, press paper presser 1.
3 and 14 come into contact with the recess 8, but the cutting blade l2 is not yet lowered. Therefore, there is a perforation in the center of the recess 8.
The operation of matching a becomes more reliable.

Effects of the Invention The invention described in claim 1 has a guide plate that supports perforated continuous paper with a V-shaped inclined recess and an opening located at the bottom of the recess, and the continuous paper is placed on both sides of the recess. A plurality of conveying rollers are arranged along the conveyance direction of the continuous paper to hold it in place, and a plate-shaped cutting blade is held at an opposing position between them so that the cutting blade can move forward and backward in the direction of the cut. A cutting body is provided, which includes a pair of paper pressers each having an inclined surface that fits into a recess formed on the side of the blade surface of the blade, and a moving force imparting portion that applies a moving force to the paper presser to move the cutting blade in the direction of the blade surface. ,
A cutting blade holding part is provided to hold the cutting blade so as to move forward and backward with respect to the recessed part, a cutting blade moving part is provided to apply a moving force to the cutting blade in a direction toward or away from the guide plate, and a contact part of the cutting blade holding part is provided. A cam is installed that moves the cutting blade toward the recess by rotating in contact with the guide plate, so even if the perforation of continuous paper is slightly off the center of the recess of the guide plate, the paper presser will continue to move into the recess. In the process of pressing the paper, the perforation can be displaced to the center of the recess, and therefore, the cutting blade can be brought into reliable contact with the perforation, and continuous paper can be easily cut with a small force. .

The invention as set forth in claim 2 provides a cam with a holding portion that maintains a state in which the paper presser of the cutting body contacts the concave portion of the guide plate and the positional relationship between the paper presser and the cutting blade does not displace from the initial state for a certain period of time. This has the effect of making it possible to more reliably align the perforation of the continuous paper with the center of the recess of the guide plate.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a structure for driving a cutter showing an embodiment of the present invention, Fig. 2 is a vertical cross-sectional side view of a structure for cutting continuous paper, and Fig. 3 is an exploded perspective view of a cutting blade and paper presser. 4 is a front view of the cam, FIG. 5 is a cam diagram of the cam, FIG. 6 is a side view showing the first conventional example, FIG. 7 is a side view showing the second conventional example, Figure 8 is a side view showing the third conventional example; Figure 9 is a side view showing the third conventional example;
The figure is a side view showing a fourth conventional example, and FIG. 10 is a side view showing a fifth conventional example. 1... Continuous paper, Ia... Perforation, 2, 3...
Guide plate, 4, 5... Conveyance roller, 8... Concave portion, 9.
...Opening, 11... Cutting body, l2... Cutting blade, 12
a...Blade surface, 13, 14...Paper presser, 15...
Moving force applying part, 24, 25... Slanted surface, 26... Cutting blade holding part, 30a... Contact part, 3l... Cam, 3
1a... Holding part, 32... Cutting blade moving part Applicant: Tokyo Electric Co., Ltd. 1 Figure 3 5 Figure 1 6 It (Residence 3 dissipated) Figure 3 d (Kanri)

Claims (1)

[Scope of Claims] 1. A guide plate having a V-shaped inclined recess and an opening located at the bottom of the recess to support perforated continuous paper, and a guide plate on both sides of the recess for conveying the continuous paper. A plurality of conveyance rollers are arranged along the direction to sandwich the continuous paper, and a plate-shaped cutting blade is held at a position facing each other between the cutting blade and the cutting blade so as to be movable back and forth in the cutting direction of the cutting blade. Cutting comprising a pair of paper pressers, each of which has a sloped surface that fits into the recess on the side of the blade surface of the cutting blade, and a moving force imparting section that applies a force to move the paper press in the direction of the blade surface of the cutting blade. a cutting blade holding part that holds the cutting blade so as to move forward and backward with respect to the recessed part, a cutting blade moving part that applies a moving force to the cutting blade in a direction toward or away from the guide plate, and the cutting blade. A burster comprising: a cam that moves the cutting blade toward the recess by rotating in contact with a contact portion of a holding portion. 2. The paper presser of the cutting body comes into contact with the recess of the guide plate, and
2. The burster according to claim 1, wherein the cam is provided with a holding portion that maintains for a certain period of time a positional relationship between the paper presser and the cutting blade that is not displaced from an initial state.