JPH0392295A - Burster - Google Patents

Abstract

PURPOSE:To cut off a continuous paper sheet easily with a small force, by retaining a pair of paper pressors whose one ends have inclined surfaces approximately parallel with the inclined surfaces of a recessed portion, and which are movable in a direction meeting at right angles with the transport direction of the continuous paper sheet at a movable support body at positions confronting each other with on intervening cutting off edge. CONSTITUTION:When transport rollers 14, 15 are stopped and a continuous paper sheet 1 is pressed by means of paper pressors 22, 23, the continuous paper sheet 1 is bent into a dogleg form at a breakable sewing machine stitches part, and in the case of sewing machine stitches being somewhat shifted against the cutting edge 28 of a cutting off edge 21, as pressors 22, 23 receive resistance from the inclined surface of the portion of the continuous paper sheet 1 given with tensile force, pressors 22, 23 together with the cutting off edge 21, a movable support body 4 and guide plates 9, 10 are displaced to a sewing machine side due to a component force generated from resistance force, and in a process in which paper pressors 22, 23 press-welds the continuous paper sheet 1 against the inclined surfaces 16, 17 of the recessed portion 18 of the guide plate 9, sewing machine stitches are cut off, as the cutting edge 28 of the cutting off edge 21 and the recessed portion 18 are set at 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. 4, a pair of pressing bodies 53 for holding a continuous sheet of paper 1 is provided between a plurality of pairs of conveyance rollers 51 and 52 that hold a continuous sheet of paper 1. An invention in which the continuous paper l is conveyed to the left by , the upstream conveyance roller 52 is stopped, and only the downstream conveyance roller 5l is driven, thereby pulling the continuous paper l to the left and cutting it from the perforation 1a. is described in Japanese Patent Publication No. 57-21754.

Further, as shown in FIG. 5, 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 that press the continuous paper 1 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 1, 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 opposite direction and pulling the continuous paper 1. It is described in.

Further, as shown in FIG. 6, 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 a conical conveyance roller 59 located on the downstream side thereof, and the continuous paper 1 is conveyed by both conveyance rollers 58 and 59, and the continuous paper 1 is conveyed by the conveyance rollers 58 and 59 on the upstream side. 58 and drives only the downstream conveyance roller 59, the continuous paper 1 is pulled to the left,
Japanese Patent Publication No. Sho 59-359 discloses an invention in which continuous paper l is sequentially cut from one end of perforation 1a by a difference in circumferential speed between both ends of a conical conveyance roller 59.

Further, as shown in FIG. 7, the continuous paper 1 that has been conveyed a certain distance is pressed against the paper guide 6l by the pressing body 60, and the roller 6 rotates the continuous paper 1 in one direction by the pressing body 62.
Japanese Patent Publication No. 59-360 discloses an invention in which the continuous paper 1 is cut from the perforation 1a by pressing the continuous paper 1 into contact with the perforation 1a and at this time displacing the pressing body 62 in the rotational direction of the roller 63 to pull the continuous paper 1. It is described in.

Furthermore, as shown in FIG.
2 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 the cutter 65 in between, and the cutter 65 is lowered to move the continuous paper 1 to the perforation 1.
The invention of cutting from a was published in Japanese Patent Publication No. 57-4935.
It is described in Publication No. 9.

Problems to be Solved by the Invention The inventions shown in FIGS. 4 to 7 all cut the continuous paper 1 by tearing it by pulling it.
Since the continuous paper l cannot be cut unless it is pulled strongly, a large driving force is required. Further, in the invention shown in FIG. 8, since the length of the continuous paper 1 varies, the perforation 1a is not always located directly below the cutter 65. If the perforation 1a deviates from directly below the cutter 65, the continuous paper l will be bitten by the sharp cutter 65 and will be bent under tension without being displaced in the conveying direction, and the tension will cause the continuous paper l to move away from the perforation 1a. Because it will be disconnected,
After all, a large driving force is required. Accordingly, there is a problem in that a large tension cannot be applied to the continuous paper 1 unless the continuous paper 1 is clamped with strong force by the pressing body 66 and the guide plate 64 before and after the cutter 65. Furthermore, cutter 65
Since the cross section is V-shaped when viewed from the blade thickness direction, it is difficult to polish left and right symmetrically during manufacturing and periodic polishing, and the position of the blade edge tends to change in the blade thickness direction. .

This also causes a change in the position of the blade edge relative to the perforation 1a.

Means for Solving the Problems A movable support body holding a guide plate supporting a continuous paper sheet having perforations formed at predetermined intervals is provided so as to be movable along the longitudinal direction of the continuous paper sheet, and the movable support body They are biased by a biasing means with balanced biasing forces from opposite directions along the longitudinal direction of the continuous paper, and are arranged at a predetermined interval along the conveying direction of the continuous paper to respectively sandwich the continuous paper. A plurality of pairs of conveyance rollers are provided, a recessed portion inclined in a V-shape between the conveyance rollers and an opening located at the bottom of the recessed portion are formed in the guide plate, and a blade edge is inserted into the opening so as to be freely advanced and retracted. a plate-shaped cutting blade having;
a pair of paper pressers each having an inclined surface substantially parallel to the inclined surface of the recess at one end and facing each other with the cutting blade in between;
It was mounted on the movable support so as to be movable in a direction perpendicular to the conveying direction of the continuous paper, and the cutting blade and the paper presser were connected to a drive section.

Function Continuous paper is transported by multiple sets of transport rollers, and when the perforation of the continuous paper reaches a position facing the edge of the cutting blade, the transport rollers are stopped, and the paper presser presses the continuous paper to fold it. If the perforation is slightly offset from the edge of the cutting blade when the paper is bent in a dogleg shape at a perforation that is easily The paper presser is displaced together with the cutting blade, the movable support, and the guide plate due to the component force generated from the resistance force. The green blade of the paper can be aligned with the recess, and therefore, by bringing the cutting blade into contact with this perforation, the continuous paper can be easily cut with a small force.

Embodiment An embodiment of this defense will be explained based on FIGS. 1 to 3. Continuous paper will be described using the same reference numerals as in the past. As shown in FIG. 1, although only one side is shown, movable supports 4 are provided in openings 3 formed in opposite side plates 2, and these movable supports 4 facing on both sides have a plurality of movable supports 4. Bearing 5 is installed. These bearings 5 are movably fitted into elongated holes 6 of a support plate 7 fixed to the side plate 2. In addition, the movable support 4
are biased from opposing directions with balanced biasing forces by a pair of springs 8 serving as biasing means. That is, the movable support 4 moves along the longitudinal direction of the continuous paper 1 in response to an external force, but when the external force is removed, the spring 8
It is stabilized in a neutral position by the balance of.

A guide plate 9 supporting the continuous paper 1 and a guide plate 10 above the guide plate 9 are fixed to the movable support 4 with a predetermined gap therebetween. The ends of these guide plates 9 and 10 are connected to a paper insertion path 1l and a paper ejection path l2, both sides of which are fixed to the side plate 2, and the leading end of the continuous paper l is connected to the exit of the paper ejection path l2. A detector 13 for optical detection is provided. Further, a plurality of pairs of transport rollers 14 and 15 are provided on the side plate 2, which are arranged along the transport direction of the continuous paper 1 and each elastically clamps the continuous paper 1. Further, the guide plate 9 has a V-shaped recess l8 located between these conveyance rollers 14 and l5 and having an inclined surface 16.17, and a V-shaped recess l8 located at the bottom of this recess 18 in the width direction of the guide plate 9. An elongated opening l9 is formed along the . However, this frontage 1
9 is formed slightly off-centered from the center of the recess 18 toward one of the inclined surfaces 17. Further, a large opening 20 is formed in the upper guide plate 10, and a cutting blade 2l located above the opening 20 and a pair of paper pressers 22, 23 facing each other with the cutting blade 21 in between are attached to the movable support. It is held by the body 4 so as to be vertically movable. An inclined surface 24 parallel to the inclined surface l6 is formed on the lower surface of the paper presser 22, and an inclined surface 25 parallel to the inclined surface 17 is formed on the lower surface of the paper presser 23. The cutting blade 2l has a vertical surface 26.27 facing the inner surface of the paper presser 22.23, and one vertical surface 26.
This blade edge 28 is perpendicular to the intersection of the extended surfaces of the inclined surfaces 24 and 25 of the paper presser foot 22 and 23 and the intersection of the inclined surfaces 16 and 17 of the recess l8. Located within the plane.

As shown in FIG. 3, vertical long holes 29 are formed on both sides of the cutting blade 2l, and a bottle 30 is provided upright. Furthermore, shafts 3l erected on both sides of the inner surface of the paper presser 22 are inserted into the elongated holes 29 and holes 32 formed in the paper presser 23, and a nut 33 is screwed onto the tip thereof. . Further, the bins 30 are inserted into the lower ends of vertical long holes 34 formed on both sides of the paper presser 23, and springs 36 is installed. That is, the pair of paper pressers 22 and 23 are connected by a shaft 31 and a nut 33 with the cutting blade 21 in between, and further,
The cutting blade 21 is urged downward by a spring 36.

Next, the drive unit 37 that drives the cutting blade 21 and paper pressers 22 and 23 will be explained with reference to FIG.

That is, this drive section 37 includes a gear 40 that is directly connected to a motor 38 and meshed with a gear 39, and a spring clutch 43 that transmits the rotational force of the gear 40 in an intermittent manner to a rotating shaft 42 to which a cam 4l is fixed at both ends. , a pair of left and right links 46 that have a cam follower 44 that contacts the outer peripheral surface of the cam 41 and rotate in the vertical direction about a fulcrum portion 45; and a shaft 47 that is fixed to these links 46 and the cutting blade 21. It consists of a pair of left and right links 48 that connect both ends of the.

The spring clutch 43 has a sleeve 43b having a protrusion 43a formed on its outer periphery to engage a rotatable trigger 50 driven by a solenoid 49.
When the trigger 50 is released from the protrusion 43a of the gear 4
This is a well-known spring clutch that transmits zero rotation to the rotating shaft 42. The cutting blade 2l is a spring 21a.
The shaft 4 is urged downward by the link 48.
7 is pulled up, it is held in the raised position together with the paper presser foot 22,23.

In such a configuration, the conveyance rollers 14 and 15 are driven by a motor (not shown) to convey the continuous paper l from the right to the left in FIG. The motor is stopped by the detection signal from device l3. The timing of this stop is perforation 1a of continuous paper l.
This substantially coincides with the time when the position reaches the position facing the blade edge 28 of the cutting blade 2l. When the trigger 50 is removed from the protrusion 43a of the sleeve 43b by the excitation action of the solenoid 49, the spring clutch 43 transmits the rotation transmitted from the motor 38 to the gear 40 to the rotating shaft 42 and the cam 41. As a result, when the cutting blade 2l descends, the spring 3
The paper pressers 22 and 23 biased by the paper presser 6 first contact the continuous paper l and press the continuous paper l against the slopes l6 and 17 of the recess 18 of the guide plate 9, and immediately after that, the cutting blade 2l opens. l9
Cut the continuous paper l from the perforation 1a while protruding from the perforation 1a.

Here, the operation of the paper pressers 22 and 23 will be explained.

Stop the transport rollers 14, 15 and press the paper presser 22, 23.
When the continuous paper 1 is pressed by
If a is slightly deviated from the blade edge 28 of the cutting blade 2l, the paper presser 22.23 will receive resistance from the slope of the bent portion of the continuous paper l to which the paper presser 22.23 is tensioned. , the force generated from the resistance forces the paper presser 2.
2.23 is the cutting blade 21, the movable support 4, and the guide plate 9
, 10 and is displaced toward the perforation la side, and the paper presser 22
．． 23 guides the continuous paper l onto the inclined surface 16 of the recess l8 of the guide plate 9.
．． 17, the cutting blade 2l is attached to the perforation 1a.
The blade edge 28 of the cutting blade 21 can be aligned with the recess l8, and the continuous paper l can be easily cut with a small force by bringing the blade edge 28 of the cutting blade 21 into contact with the perforation 1a.

Furthermore, a blade edge 2 is attached to the edge of the vertical surface 26 on one side of the cutting blade 21.
8 makes it extremely easy to maintain the position of the blade edge 28 in the thickness direction of the cutting blade 21 during manufacturing and periodic polishing work.The present invention has the above-mentioned effects. With this configuration, continuous paper is transported by multiple sets of transport rollers, and when the perforation of the continuous paper reaches a position facing the edge of the cutting blade, the transport rollers are stopped, and the paper presser is used to transport the continuous paper. Press the continuous paper to bend it into a dogleg shape at the perforation where it is easy to break, and if the perforation is slightly offset from the edge of the cutting blade, the slope of the bent part of the continuous paper under tension. Since the paper presser is subjected to resistance, the paper presser is displaced together with the cutting blade, the movable support, and the guide plate due to the component force generated from the resistance force, and in the process of the paper presser pressing the continuous paper against the recessed part of the guide plate, The edge of the cutting blade and the concave portion can be aligned with the perforation, so that the continuous paper can be easily cut with a small force by bringing the cutting blade into contact with the perforation.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a longitudinal side view, FIG. 2 is an exploded perspective view showing the state of connection between the drive unit and the cutting blade, FIG. 3 is an exploded perspective view showing the cutting blade and paper holder, and FIG. 4 is the first A side view showing a conventional example,
Fig. 5 is a side view of the second conventional example, Fig. 6 is a plan view of the third conventional example, Fig. 7 is a side view of the fourth conventional example, and Fig. 8 is the fifth conventional example. It is a side view which shows an example. DESCRIPTION OF SYMBOLS 1... Continuous paper, 4... Movable support body, 8... Biasing means, 9... Guide plate, 14.15... Conveyance roller,
16, 17... Slanted surface of guide plate, 18... Concave portion, 1
9... Opening, 21... Cutting blade, 22.23... Paper presser, 24, 25... Slanted surface of paper presser, 28...
・Blade edge, 37... Drive unit 3 Y diagram (Seirai Rei!)) ``Yumi Riku (Jika also 8 cr in 3E) b'' bLL '' a bu 5j! −

Claims (1)

[Claims] a guide plate that supports continuous paper having perforations formed at predetermined intervals; a movable support that holds the guide plate and is movable along the longitudinal direction of the continuous paper;
a biasing means for biasing the movable support body from opposite directions along the longitudinal direction of the continuous paper sheet with balanced biasing forces; A plurality of pairs of conveyance rollers that sandwich continuous paper, a recess formed in a V-shaped inclination in the guide plate between the conveyance rollers, an opening formed at the bottom of the recess, and a recess that can freely move forward and backward into the opening. a plate-shaped cutting blade having a blade edge inserted into the movable support and movably held in a direction perpendicular to the conveyance direction of the continuous paper; a pair of paper pressers having inclined surfaces and held movably on the movable support in a direction perpendicular to the conveyance direction of the continuous paper at opposing positions with the cutting blade in between; the cutting blade and the paper; A burster comprising a drive unit connected to a presser foot.