JPS61243767A - Burster - Google Patents

Abstract

PURPOSE:To prevent a paper jam in a paper disposal burster by connecting a break element and a travelling plate to be interlocked with each other in such a manner that as the break element is moved to paper discharge rollers, the travelling plate is gradually drawn in and turned to the contact side of the rollers. CONSTITUTION:If the pitch of a perforation of a form 2 is small, a break element 10 is moved to paper discharge rollers 5, 6, and a travelling plate 13 is put in turning motion, interlocking with the movement thereof so that the free end of the plate is brought close to the contact side 11 between draw-in rollers 3, 4. Accordingly, even if a perforation is positioned in the vicinity of the draw-in rollers 3, 4 remote from the break element 10, the amount of looseness is limited to prevent a paper jam and shifting in position of the perforation to the break element 10 when the form 2 is tensed, so that the form 2 is cut finely. On the other hand, if the pitch is large, the space between the break element 10 and the paper discharge rollers 5, 6 is enlarged, and the travelling plate 13 is automatically pushed down so that the form 2 is smoothly introduced from a contact 11 between the draw-in rollers 3, 4.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a burster.

BACKGROUND ART Conventionally, as shown in FIG. 5, there are pull-in rollers 3 and 4 that pinch and pull in the form 2 on which the perforations 2a are formed, and a roller that rotates at a peripheral speed faster than the circumferential speed of these pull-in rollers 3 and 4. A paper ejection roller 5.6 is provided on the frame 1 with a distance therebetween, and a form 2 is fed by the pull-in rollers 3 and 4.
is guided to the paper discharge rollers 5 and 6 by the running plate 30, the tip of the form 2 is pulled by the paper discharge rollers 5 and 6 to apply tension, and the break body 10 is pressed against the tensed form 2 to make the form 2 into a sewing machine. There is one that is cut from the eye 2a.

Problem to be Solved by the Invention Since the break body 1o does not move in the vertical direction, in order to push the tensile form 2, the contact portions 11 of the pull-in rollers 3 and 4 and the contact portions 12 of the discharge rollers 5 and 6 must be connected to each other. It is necessary to cause the break body 10 to interfere with the connecting plane. Further, the state shown in FIG. 5 is a case where the pitch of the perforations 2a is short, and as the pitch increases, the distance between the paper discharge rollers 5, 6 and the break body 10 must be widened. For this reason, the running plate 30 is positioned downward also in the vicinity of the pull-in roller 3.4 to avoid interference with the break body 10.

Therefore, the difference in height of the form 2 becomes large between the time when the leading end of the form 2 is pinched by the paper ejection rollers 5 and 6 and the time when it is held under tension by the paper ejection rollers 5 and 6. For this reason, the break body 10 shifts from the perforation 2a and pressure is applied to the portion other than the perforation 2a to be cut. If there is a perforation in the direction in which the foam 2 is fed to that part, there is a drawback that it may be cut from an undesired part. Furthermore, as described above, the running plate 30 is pulled in and the contact portion 11 of the rollers 3 and 4 is
If the pitch of the perforation 2a is short, the perforation 2a will move closer to the retraction rollers 3 and 4 until the form 2 is held between the paper ejection rollers 5 and 6.
There is a problem in that the paper loosens in the vicinity of the loop 2b, eventually causing a paper jam.

This invention was made in view of these points.

To provide a burster capable of cutting a foam cleanly and surely preventing paper jams.

Means for Solving the Problems In the present invention, the form 2 drawn in by the drawing rollers 3 and 4 is pulled by the discharge rollers 5 and 6.

In the device in which the break body 10 cuts from the perforation 2a, the break body 10 is connected to the discharge rollers 5 and 6.
The break body 10 and the running plate 13 are interlocked and connected so that the running plate 13 is gradually rotated toward the contact portion 11 of the retracting rollers 3 and 4 as the break body 10 moves in the direction of .

When the pitch of the working perforations 2a is short, the break body 10 is moved in the direction of the paper discharge rollers 5 and 6. In conjunction with this movement, the running plate 13 rotates, and the free end of the rotation approaches the contact portion 11 of the drawing rollers 3 and 4. Therefore, even if the perforation 2a is located near the pull-in rollers 3 and 4 that are far away from the break body 10, the amount of slack is limited, paper jams are prevented, and the break body 10 is To prevent displacement of a perforation 2a and neatly cut a form 2.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 4. A pair of pulling rollers 3 and 4 are rotatably provided on the right side of the frame 1, and a pair of paper ejection rollers 5 and 6 that rotate at a peripheral speed faster than the peripheral speed of the pulling rollers 3 and 4 are provided on the left side. is provided. Holding bodies 8 having longitudinal grooves 7 are fixed to both sides of the frame 1, and screws 9, which are slidably held in the grooves 7, are screwed onto both sides of the break body 10. This break body 10 is connected to the drawing rollers 3 and 4.
It is located at a position that interferes with a plane connecting the contact portion 11 of and the contact portions 12 of the paper ejection rollers 5 and 6.

A traveling plate 13 facing the lower part of the break body 10 at a distance is rotatably supported by a fulcrum 14 provided near the discharge rollers 5 and 6. A torsion spring 16 having a hook 17 held by the frame 1 and a hook 18 for pushing the traveling plate 13 from below is held on a shaft 15 erected on both sides of the frame 1. One end of a plurality of presser ribbons 19 that press the form 2 from above is held by a support rod 20.

Further, an auxiliary running plate 21 is fixed to the left side of the frame 1 for guiding the form 2 from the running plate 13 to the paper discharge rollers 5 and 6, and an auxiliary running plate 22 is fixed to the right side of the frame 1 so as to be moved downward by a spring 23. A stopper shaft 25 that is biased and held rotatably around a fulcrum portion 24 and that restricts upward movement of the traveling plate 13 is provided.

Furthermore, control surfaces 26 are integrally formed on both sides of the running plate 13 to interfere with both sides of the break body 10 and urge the running plate 13 to move upward as the break body 10 moves leftward.

In such a configuration, FIG. 1 shows a case where a form 2 with a short pitch of perforations 2a is cut, and the distance between the break body 10 and the paper ejection rollers 5'' and 6 is adjusted according to the pitch. The state is that the break body 1 is on the right side of the control surface 26.
Since it is released from 0, the running plate 13 rotates so that its right end approaches the contact portion 11 of the pull-in rollers 3 and 4.
The distance from the presser ribbon 19 is narrowed. Therefore, before the leading edge of the form 2 reaches the discharge rollers 5 and 6, the perforation 2a is drawn into the pull-in rollers 3 and 4, but since the distance between the running plate 13 and the presser ribbon 19 is narrow, the form 2 The amount of slack is controlled to a minimum. Therefore, paper jams can be prevented. When the leading end of the form 2 is held between the paper discharge rollers 5 and 6, the form 2 is tensed and pressed against the break body 10, and is cut from the perforation 2a.

The fact that the amount of slack in the form 2 before tensioning is small means that the amount of vertical displacement of the form 2 is small, which prevents the perforation 2a from shifting with respect to the break body 10, and prevents the perforation 2a other than the one to be cut. The foam 2 can be cut cleanly without applying unnecessary pressure to the parts.

When cutting the form 2 with a long pitch of perforations 2a, cut the break body 1 according to the pitch as shown in Figure 2.
0 and the paper discharge rollers 5 and 6. At this time,
The break body 10 slides on the control surface 26 with its shaft portions on both sides and automatically pushes down the running plate 13 to maintain a constant distance from the running plate 13. Since the running plate 13 is lowered and the auxiliary running plate 22 rotates downward in conjunction with this, the form 2 can be smoothly guided from the contact portion 11 of the drawing rollers 3 and 4 to the end of the running plate 13. When the form 2 is held between the paper discharge rollers 5 and 6, the presser ribbon 19 is pushed up and tensioned, and the form 2 is pressed against the break body 10 and cut from the perforation 2a.

Effects of the Invention Since the present invention is constructed as described above, when the pitch of the perforation is short, the perforation portion is drawn between the break body and the pull-in roller in order to move the break body toward the paper ejection roller. However, by bringing the end of the running plate close to the contact area of the retracting roller, it is possible to suppress the slack of the form, and therefore, it is possible to prevent the perforation from misaligning with the break body and to cut the form cleanly. To prevent paper jams, when cutting a form with a long perforation pitch, when the break body is moved toward the pull-in roller, the running plate is rotated in the direction away from the contact area of the pull-in roller. This makes it possible to maintain a constant distance between the break body and the running plate, and furthermore, by linking the auxiliary running plate to this movement, the form can be pulled in and smoothly guided from the roller to the end of the running plate. have an effect.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention, with Figure 1 being a vertical cross-sectional side view showing a state in which a form with a short perforation pitch is cut, and Figure 2 being a longitudinal side view showing a state in which a form with a long perforation pitch is cut. Figure 3 is an exploded perspective view showing the interlocking structure between the break body and running plate, Figure 4 is a perspective view showing the overall structure, and Figure 5 is the perforation pitch. FIG. 3 is a vertical cross-sectional side view showing a conventional example of cutting a short and narrow form. 2... Form, 2a... Perforation, 3, 4...
Pull-in roller, 5, 6... Paper ejection roller, 10...
Break body, 11...Contact part of drawing roller, 12
...contact part of paper discharge roller, 13...travel plate, 14.
...Fulcrum part, 22...Auxiliary traveling plate, 24...Fulcrum part applicant Tokyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A drawing roller that pinches and draws in a form folded in a zigzag shape with perforations, and a paper ejection roller that rotates at a peripheral speed faster than the peripheral speed of these drawing rollers. The pull-in roller and the paper ejection roller are arranged at a distance from each other, and the break body facing the perforation is located at a position that interferes with a plane connecting the contact portion of the pull-in roller and the contact portion of the paper ejection roller. A traveling plate is provided movably and freely fixed at any position between them, and guides the form from the drawing roller to the paper ejecting roller, and as the break body moves toward the paper ejecting roller, the traveling plate is gradually moved. A burster characterized in that the break body and the traveling plate are interlocked and connected so as to rotate toward the contact portion of the pull-in roller. 2. A drawing roller that pinches and draws in a form folded in a zigzag shape with perforations, and a discharge roller that rotates at a circumferential speed faster than the circumferential speed of these drawing rollers are arranged in a spaced manner, A break body facing the perforation is positioned at a position interfering with a plane connecting the contact portion of the pull-in roller and the contact portion of the paper ejection roller, and is movable between the pull-in roller and the paper ejection roller. The travel plate is provided so as to be fixed at any position, and rotates a traveling plate that guides the form from the pull-in roller to the paper ejection roller in a direction toward and away from the break body around a fulcrum located on the paper ejection roller side. the running plate is movably provided, biasing the running plate toward the break body, and gradually rotating the running plate toward the contact portion of the drawing roller as the break body moves toward the paper ejection roller; A burster characterized in that a break body and the running plate are interlocked and connected. 3. A drawing roller that pinches and draws in a form folded in a zigzag shape with perforations, and a discharge roller that rotates at a circumferential speed faster than the circumferential speed of these drawing rollers are arranged in a spaced manner, A break body facing the perforation is positioned at a position interfering with a plane connecting the contact portion of the pull-in roller and the contact portion of the paper ejection roller, and is movable between the pull-in roller and the paper ejection roller. The travel plate is provided so as to be fixed at any position, and rotates a traveling plate that guides the form from the pull-in roller to the paper ejection roller in a direction toward and away from the break body around a fulcrum located on the paper ejection roller side. the running plate is movably provided, biasing the running plate toward the break body, and gradually rotating the running plate toward the contact portion of the drawing roller as the break body moves toward the paper ejection roller; An auxiliary running plate that interlocks and connects the break body and the running plate and guides the form from the contact portion of the drawing roller to an end of the running plate is rotated about a fulcrum located on the drawing roller side. Set up freely,
A burster characterized in that the running plate and the auxiliary running plate are interlocked and connected.