JPH04354697A - Sheet punch - Google Patents

Abstract

PURPOSE:To convey and punch a sheet to form filing holes by providing a driving device driving both endless belts from the state that edge bodies and edge body receiving holes are located at preset reference positions in response to the detection signal of a detecting means. CONSTITUTION:The first endless belt A stretched drivably by a pair of rollers and the second endless belt B stretched drivably by another pair of rollers are arranged so that the conveyance direction of a sheet 3 and the driving direction both endless belts A, B coincide when the sheet 3 is guided between both endless belts A, B, and multiple punching edge bodies 4 protruded from the surface of the first endless belt A are arranged in the conveyance direction of the sheet 3. Edge body receiving holes 5 are arranged at the positions of the second endless belt B corresponding to the edge bodies 4, when the sheet 3 reaches the preset position immediately before both endless belts A, B, it is detected by a detecting means S. Both endless belts A, B are driven by the detection signal.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper punching device for punching filing holes in copy paper used primarily in copying machines.

0002

[Prior Art] Conventionally, in order to automatically punch filing holes in copy paper in a copying machine, a perforator is provided in the middle of the copy paper conveyance path, and when the copy paper is conveyed to the position of the perforator, the perforator is opened. There are known devices that make it work. (For example, see Japanese Patent Application Laid-Open No. 140755/1983)
.

0003

[Problems to be Solved by the Invention] However, such conventional devices use a perforator in which the blade moves back and forth in a direction perpendicular to the surface of the copy paper. When the copy paper is transported to the position of the perforator, it is necessary to temporarily stop the copy paper, operate the perforator to perforate the copy paper, and then transport the copy paper to the discharge hole or the like again. Therefore, there is a problem in that extra time is spent on drilling, which reduces the copying efficiency of the copying machine.

The present invention has been made in consideration of the above-mentioned circumstances, and it is an object of the present invention to provide a paper punching device that can efficiently punch filing holes without stopping the paper being conveyed.

[0005]

[Means for Solving the Problems] The present invention provides a first endless belt that is stretched so as to be driven by a pair of rollers in the middle of a paper conveyance path, and a first endless belt that is stretched so that it can be driven by a pair of rollers. 2 endless belts are arranged so that when the paper is guided between the first and second endless belts, the conveyance direction of the paper coincides with the driving direction of the first and second endless belts, and the surface of the paper is A plurality of perforating blades protruding from the second endless belt are disposed in the paper conveyance direction, and a blade receiving hole is disposed at a position corresponding to the blade of the second endless belt, and a predetermined position immediately before both endless belts. a detection means for detecting when the paper reaches the position, and a drive device for driving both endless belts from a state in which the blade and the blade receiving hole are at a predetermined reference position in response to a detection signal from the detection means. A paper punching device is provided.

[0006]

[Operation] When the paper reaches a predetermined position immediately in front of both endless belts, the detection means detects it and outputs a detection signal. The drive device receives the detection signal and drives both endless belts to move the blade and the blade receiving hole at a predetermined reference position. As a result, filing holes arranged in the conveying direction of the paper are punched in the paper.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on embodiments shown in the drawings. This invention is not limited by this.

FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a perspective view of the main part thereof. In these figures, A and B are a pair of endless belts for punching filing holes in the copy paper 3, and are installed in the middle of the conveyance path of the copy paper 3 in the copying machine. As for the specific structure of the copying machine, any conventionally known structure can be arbitrarily adopted, so illustration thereof is omitted. In an electrophotographic copying machine, the copy paper is sent from the paper feed section to the transfer section, and after the image is transferred from the photoreceptor drum, it is sent out to the ejection port via the fixing section. A conveyance path for the copy paper 3 is constituted by conveyance rollers and the like disposed between them. The positions of the endless belts A and B in the conveyance path of the copy paper 3 can be selected as appropriate, such as between the fixing section and the take-out port, in front of the fixing section, between the paper feed section and the transfer section, etc.

The endless belt A has a pair of rollers 1 and 6.
The endless belt B is tensioned so as to be movable in the direction of arrow a by a pair of rollers 2 and 7, and the endless belt B is stretched so as to be movable in the direction of arrow b by a pair of rollers 2 and 7. The rollers 1, 2 and 6, 7 are rotatably supported by the body of the copying machine parallel to each other, and the interval between the rollers 6, 7 is set wider than the interval between the rollers 1, 2, and the endless belts A, B are The intervals gradually become wider in the direction of arrow P.

The endless belt A has punching blades 4 protruding from three locations at predetermined intervals in the direction of conveyance of the copy paper 3 (in the direction of arrow P), and the endless belt B and the roller 2 each have blades 4 for punching. A blade receiving hole 5 and a recess 2C (FIG. 7) corresponding to the blade 4 are provided. The blade body 4 has a circular or elliptical blade shape and is fixed to the endless belt A with a metal fitting 4a as shown in FIG. FIG. 4 is a top view thereof. Furthermore, an eyelet fitting 5a is attached to the blade receiving hole 5 provided in the endless belt B. Further, in this embodiment, the recessed portion 2C is formed in the shape of a groove on the surface of the roller 2, as shown in FIG.

As shown in FIG. 2, the rollers 1 and 2 are synchronously rotated in opposite directions by gears 1b and 2b attached to respective shafts 1a and 1b, and as the rollers 1 and 2 rotate, an endless belt is rotated. A and B are driven to engage and disengage the blade 4 from the blade receiving hole and the recess 2C. The shaft 1a of the roller 1 is connected to a motor M, and the motor M is driven by a control circuit C. Furthermore, the endless belt B is provided with a suction fan F as shown in FIG. (see) and is separated from the endless belt A. In addition, roller 6,
7 is a driven roller.

A microswitch S is provided at a predetermined position immediately before the endless belts A and B in the copy paper conveyance path as a detection means for detecting when the copy paper 3 reaches this position. The signal from is input to the control circuit 8. Then, the control circuit C drives the motor M to previously set the blade 4 and the blade receiving hole 5 at a predetermined reference position (the position shown in FIG. 1) spaced apart from each other.

When receiving a detection signal from the microswitch S, the control circuit C drives the motor M and the suction fan F for a predetermined period of time. Note that at this time, the driving speeds of the endless belts A and B are set to correspond to the moving speed of the copy paper 3. Endless belts A and B are preferably constructed of chloroprene rubber with a thickness of 2 mm.

In such a configuration, when the copy paper is conveyed during operation of the copying machine and reaches a position just before the endless belts 1 and 2, the motor M and the suction fan F are turned on in response to a detection signal from the microswitch S. Start driving. Along with this, endless belts A and B begin to rotate in the directions of arrows a and b, respectively. At the same time, a blade 4 and a blade receiving hole 5 are provided on endless belts A and B, respectively.
rotates from the reference position.

On the other hand, as the copy paper 3 continues to move in the direction of arrow P, as shown in FIG.
inserts the copy paper 3 and engages with the blade receiving hole 5 and the recess 2C, thereby forming filing holes arranged in the copy paper transport direction at predetermined locations on the copy paper 3.

Further, the endless belts A and B move, and the blade body 4 and blade receiving hole 5 are separated from each other. The copy paper 3 is then sucked by a suction fan F, separated from the endless belt A, and conveyed and discharged by the endless belt B, as shown in FIG. Then, the endless belts A and B stop when the blade 4 and the blade receiving hole 5 return to their original reference positions (the positions shown in FIG. 1). Note that the suction fan F is stopped at an appropriate time before that.

[0017] In this way, the copy paper being conveyed can be perforated without stopping, and extra time is not wasted for perforation.

[0018]

According to the present invention, since the filing holes can be punched while conveying the paper, there is no need to provide a special time for punching the filing holes.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a perspective view of the main part of FIG. 1;

FIG. 3 is a cross-sectional view of the main part of FIG. 1;

FIG. 4 is a top view of the main part of FIG. 1;

FIG. 5 is a cross-sectional view of the main part of FIG. 1;

FIG. 6 is a top view of the main part of FIG. 1;

FIG. 7 is a perspective view of the main part of FIG. 2;

FIG. 8 is an explanatory diagram showing the operation of FIG. 1;

FIG. 9 is an explanatory diagram showing the operation of FIG. 1;

[Explanation of symbols]

A Endless belt B Endless belt 1 Roller 2 Roller 6 Roller 7 Roller 3 Copy paper 4 Blade body 5 Blade receiving hole 2C Recessed part S Micro switch C Control circuit M Motor

Claims (1)

[Claims] Claim 1: A first endless belt is provided in the middle of a paper conveyance path, and is stretched so as to be driven by a pair of rollers, and a second endless belt is stretched and can be driven by another pair of rollers.
The endless belt is arranged so that when the paper is guided between the first and second endless belts, the conveyance direction of the paper coincides with the driving direction of the first and second endless belts, and the first endless belt is A plurality of protruding punching blades are disposed in the paper conveyance direction, and a blade receiving hole is disposed at a position corresponding to the blade of the second endless belt, and a blade receiving hole is disposed at a predetermined position immediately before both endless belts. A detection means for detecting when the paper has arrived, and a drive device for driving both endless belts from a state in which the blade and the blade receiving hole are at a predetermined reference position in response to a detection signal from the detection means. A paper punching device characterized in that: