JPH10296695A - Sheet material punching device and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a sheet material without any breakage even if paper clogging occurs in the sheet material carried to a sheet material punching device. SOLUTION: This punching device is formed so as to include, at a facing position between which a sheet material conveyance passage is put, a pair of conveyance guides 12, 14, a dies roller 15 which is fitted and conveyed while rotating according to the conveyance speed of a sheet material P, and a punch 11. A sheet material conveyance passage releasing means is formed, which is capable of rotating the conveyance guide 12 to a position of releasing the sheet material conveyance passage with a pin 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material punching device for punching holes in a conveyed sheet material and an image forming apparatus provided with the sheet material punching device.

[0002]

2. Description of the Related Art Heretofore, there has been a sheet material punching apparatus which can automatically punch holes used for subsequent filing, data processing, and the like in a sheet material on which an image is formed by an image forming apparatus such as a copying machine. is there.

[0003] This sheet material punching device is disclosed, for example, in Japanese Patent Application Laid-Open No.
As described in JP-A-182697, there is an apparatus (sorter) provided in the middle of a sheet material conveying path of an apparatus (sorter) for sorting sheet materials output from an image forming apparatus.

FIG. 5 is a diagram schematically illustrating the configuration of a conventional sheet material punching apparatus 500. A die roller 501 and a punch 502 sandwich a sheet material transport path H 'in the middle of a sheet material transport path H'. It is provided in such a facing position.

The die roller 501 and the punch 502
Rotates in the forward direction of the sheet material (arrow A ') at a peripheral speed substantially equal to the transport speed, and punches a hole while the sheet material is being transported.

The sheet material punching device 500 includes conveyance guides 503 and 504 for forming a sheet material conveyance path H '.
Are provided in a fixed state.

[0007]

However, when there is a foreign matter such as a hole or the like in the sheet material near the die roller 501 and the punch 502, the sheet material conveyed as shown in FIG. A paper jam that stops or stays between the guides 503 and 504 may occur.

The interval between the transport guides 503 and 504 is set to be narrow to some extent because the transportability is deteriorated if the interval is too large. 5 (b), the sheet material is torn in the middle as shown in FIG. 5 (c) and stays in the sheet material punching device 500 even when the downstream conveyance guide 505 is opened and pulled out. Occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to break a sheet material when the sheet material conveyed to a sheet material punching device is jammed. It is to be able to remove without doing.

[0010]

In order to achieve the above object, according to the present invention, a pair of conveying guides and a pair of conveying guides are rotated at an opposing position sandwiching a sheet conveying path in accordance with the conveying speed of the sheet. In a sheet material punching device provided with a die and a punch for making a hole in a sheet material being fitted and conveyed, a sheet material for moving at least one of the pair of conveyance guides to a position releasing the sheet material conveyance path. It is characterized by having a transport path opening means.

The sheet conveying path opening means has a rotating shaft for rotatably supporting the conveying guide and a holding member for holding the conveying guide at a position for guiding the sheet conveying path. And

In the image forming apparatus, an image forming means for forming an image on a sheet material, a sheet material conveying path for conveying the sheet material on which the image has been formed, and a sheet material punching device as described above in the sheet material conveying path. And the following.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIG. 1 is a cross-sectional configuration explanatory view of a post-processing apparatus 100 (hereinafter, referred to as a sorter) provided with a sheet material punching apparatus according to a first embodiment. The sorter 100 is connected to the image forming apparatus 200, and as a basic operation,
For example, when a plurality of sets of copies are required, the sheet material after image formation discharged from the image forming apparatus 200 is sequentially sorted into a plurality of bins and page alignment is performed. The ability to drill holes,
Some devices have a stapling function, and are devices for processing sheet materials after image formation.

The image forming apparatus 200 includes an electrophotographic image forming section (not shown), and conveys the sheet material onto which the toner image has been transferred to a pair of fixing rollers 201, and a pair of conveying / discharging rollers 202 to form the image forming apparatus. Discharge out of 200.

The structure of the sorter 100 will be described in order from the upstream side to the downstream side in the sheet material conveying direction. Reference numeral 8 denotes a sensor for detecting the sheet material sent from the image forming apparatus 200; Is a pair of transport rollers, 7 is a flapper for switching the transport path, and 3 and 4 are transport guides.

Reference numeral 1 denotes a punch unit as a sheet material punching device for punching a hole in the sheet material being conveyed by engaging a die roller and a punch which rotate in synchronization with the conveying speed of the sheet material.

Reference numerals 21, 22, 23, and 24 denote transport guides on the downstream side of the punch unit 1, and reference numeral 25 denotes a bin 3
A discharge roller that discharges the sheet material to 1, 32... In addition, bottles 31 and 3
Reference numeral 2 moves up and down to perform page alignment of the discharged sheet material.

FIG. 2 is an enlarged view of a portion D1 in FIG. 1, and a detailed configuration of the punch unit 1 will be described with reference to FIG. 11 is a punch, 15 is a die roller, and 15
a is a hole provided in the die roller 15 as a die.

The die roller 15 rotates in the direction of arrow a and the punch 11 rotates in the direction of arrow b in a driving system (not shown) in synchronism with the conveying speed of the sheet material.
1 and the hole 15a of the die roller 15 are engaged with each other to punch the sheet material P conveyed therebetween.

Reference numeral 14 denotes a conveyance guide fixed to the punch unit 1, and 12 denotes a pin 13 fixed to the punch unit 1.
, And one end is fixed to the conveyance guide 21 with screws 18. Therefore, in this embodiment, the pins 13 of the transport guide 12 function as sheet material transport path opening means.

The transport guide 12 has a projection 12a, and a spring 16 serving as a holding member interposed between the projection 12 fixed to the inside of the punch unit 1 and a guide 16 guides the sheet material transport path. Direction)
Is held.

The spring 16 is located at a position distant from the area where the sheet material passes, and the sheet material can pass through the side of the spring 16 without interfering.

In such a configuration, when the sheet material P is broken or jammed in the vicinity of the punch unit 1 and a paper jam (jam) occurs in the middle of the punch unit 1, the user can use the image forming apparatus 200. According to a display on an operation unit (not shown) of the main body, a knob 21 of the transport guide 21 is provided.
After holding the sheet P and rotating in the direction of arrow C shown in FIG. 3, the jammed sheet material P is removed, and the jam processing is performed.

In this case, since the transport guide 12 moves so as to release the sheet transport path of the punch portion, the sheet material folded in a bellows shape and the sheet material sandwiched between the die guide 15 and the transport guide 12 are released, and the transport is easy. Can be removed.

The sheet conveying path opening means may be constituted by a slider for sliding the conveying guide 12 to the left in FIG. 2, and further, the conveying guide 12 may be fixed at a predetermined position by a magnet or the like. When a jam occurs, a configuration in which the user removes the conveyance guide fixed at a predetermined position to release the sheet material conveyance path may be adopted.

(Embodiment 2) In a second embodiment shown in FIG. 4, a punch unit 301 is provided in a discharge section of an image forming apparatus 250.

The image forming apparatus 250 is a so-called crocodile-type apparatus, and is configured to rotate the cover 252 to open the sheet conveying path up and down while leaving the main structure on the body 251 side. I have. In this embodiment, on the right side in FIG. 4A, there is provided a process unit (not shown) in which a photosensitive member as an image forming unit, a developing device, and the like are integrally configured as a cartridge, and a sheet on which an image is formed. The material is transported to the left in the figure.

In the sheet material transport path, a transport roller pair 302, transport guides 303 and 304, and a punch unit 301 are arranged from the upstream side. When the cover 252 is rotated and opened, the transport roller 302f and the transport guide 304 on the upper side of the transport roller pair 302 move to the cover 252.
To release the sheet material conveyance path.

The punch unit 301 includes a punch 311 and a die roller 315 having the same configuration as in the first embodiment.
Are provided at positions facing each other across the sheet material transport path,
Further, transport guides 312 and 314 form a sheet transport path in the punch portion (the area near the space between the punch 311 and the die roller 315).

The transport guide 312 is rotatable so as to open the punch portion by a rotary shaft 313 fixed to the body 251 side, and is normally urged by a spring 314 in a direction to close the punch portion.

In such an apparatus, when a sheet jam occurs near the punch unit 301 as shown in FIG. 4B, the cover 252 is opened as shown in FIG. The portion 312e is lifted upward in the drawing (in the direction of arrow d) to release the sheet material conveyance path of the punch portion and remove the staying sheet material.

[0032]

According to the present invention described above, when a paper jam occurs in the sheet material transport path near the sheet material punching device, the transport guide is moved to the position where the sheet material transport path is released. By moving the sheet material, the sheet material can be easily removed without being damaged, the sheet material piece does not remain inside, and the workability of the apparatus returning operation can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a configuration of a main part of a sorter and an image forming apparatus according to a first embodiment.

FIG. 2 is an explanatory diagram of a configuration of a sheet material punching device (in a normal operation state).

FIG. 3 is an explanatory view of a configuration of a sheet material punching device (device return processing state).

FIG. 4 is an explanatory diagram illustrating a configuration of a main part of an image forming apparatus according to a second embodiment.

FIG. 5 is an explanatory diagram of a configuration of a conventional sheet material punching device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Punch unit (sheet material punching device) 2,5,6 Transport roller pair 3,4 Transport guide 7 Flapper 8 Sensor 11 Punch 12,14 Transport guide 13 Pin 15 Dice roller (Dice) 15a Hole 16 Spring (holding member) Reference Signs List 17 Projection portion 18 Screw 21, 22, 23, 24 Transport guide 25 Discharge roller 100 Sorter 200, 250 Image forming apparatus 201 Fixing roller pair 202 Transport / discharge roller pair 251 Body 252 Cover 301 Punch unit 302 Transport roller pair 303, 304 Transport Guide 312,314 Transport guide 313 Rotation axis

Claims (3)

[Claims] 1. A pair of conveyance guides, and a die and a punch for forming holes in a sheet material being conveyed by being fitted while rotating in accordance with the conveyance speed of the sheet material, are provided at opposing positions sandwiching the sheet material conveyance path. A sheet material punching device, comprising: a sheet material transport path opening means for moving at least one of the pair of transport guides to a position at which the sheet material transport path is released. 2. The apparatus according to claim 1, wherein the sheet material transport path opening means has a rotation shaft for rotatably supporting the transport guide, and a holding member for holding the transport guide at a position for guiding the sheet material transport path. The sheet material punching device according to claim 1, wherein: 3. An image forming means for forming an image on a sheet material, a sheet material conveying path for conveying the sheet material on which the image is formed, and the sheet material conveying path according to claim 1 or 2. An image forming apparatus comprising: a sheet material punching device.