JPH10139264A - Punching processing device in image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance filling efficiency, and attain size reduction in a tray by providing a dispersing member to dispersively throw punching chips into the tray, between a punching pin and the tray. SOLUTION: Punching chips W falling on a dispersing guide 3a arranged on the left, are distributed left and right by a posture and the falling direction when striking on a ridgeline 3b, and punching chips running along the steep inclined face 3c side are dropped in the tray 4 side from a part close to the ridgeline 3b. On the other hand, punching chips running along a gentle inclined face 3d are dropped in the tray 4 side in a part separate from the ridgeline 3b, and at the same time, a part of the punching chips W sliding down on this gentle inclined face 3d is directly dropped in a tray 4 from an opening 3e. In this way, since the dispersing guide 3a is arranged, the punching chips W punched by a punching pin 2a are dispersed in three directions. The punching chips W can be similarly dispersed even on the punching pin 2b side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perforation processing apparatus incorporated in, for example, a post-processing apparatus of a copying machine to form a filing hole in a sheet after image formation, and particularly to a large amount of perforated waste generated by perforation. The present invention relates to a perforation processing apparatus in which the volume of the accommodation space is reduced.

[0002]

2. Description of the Related Art Among various post-processing devices provided in a copying machine, a punching device for automatically forming a filing hole in a copied sheet is incorporated. Such a punching device generally includes a punch for reciprocatingly driving a punch in a punching direction in a direction crossing a path through which a sheet passes, and a tray for receiving and receiving punching scraps generated after punching. FIG. 9 shows an outline of the configuration.

FIG. 1A is a longitudinal sectional view of a main part viewed in a direction orthogonal to the sheet conveying direction, and FIG. 1B is a longitudinal sectional view taken along line XX of FIG. FIG.

In the drawing, a perforation pin 52 which moves forward and backward in a direction perpendicular to the guides 51a and 51b of the sheet S is connected to a rotary drive source via an eccentric mechanism in the perforation processing apparatus, and is provided below the guide 51b. Is provided with a tray 53 for storing perforated waste W. A pair of perforation pins 52 are arranged to simultaneously open filing holes at two places on the sheet S, and the sheet S is punched out by synchronizing them and moving up and down in the drawing. The tray 53 has a long shape in the transport direction of the sheet S, and is designed to be as small as possible in order to avoid interference with other devices.

[0005]

In such a perforating apparatus, the position of the perforation by the perforation pin 52 is fixed, so that the perforation waste W punched out by the perforation pin 52 simply falls on the tray 53 naturally. , Tray 5
In FIG. 3, two peaks are formed as shown in FIG. Therefore, even if the height of the tray 53 is increased,
When the hill-shaped portion exceeds the height of the tray 53, the piercing pin 52 hits the hill-shaped portion and acts as a resistance against a piercing force. Therefore,
As shown by the dashed line in the figure, if the tray 53 is made deeper, the storage amount of the perforated waste W increases, so that resistance to such perforation can be prevented.

However, if the volume of the tray 53 is increased, the layout will be hindered by interference with other equipment, and even if the tray 53 is deepened, the area immediately below the perforation pins 52 will be mountain-shaped, and the remaining valleys will have room for storage. It is wasted despite it. In addition, since the perforated waste W is piled up in a mountain shape, if the perforated waste W is left in the tray 53 until it becomes full, when the tray 53 is pulled out of the apparatus, the portion which is raised in a mountain shape is pulled out of the tray 53. There is also a problem that it collapses to the opposite side and overflows from the end.

On the other hand, for example, Japanese Utility Model Laid-Open No. 62-922
In the punching device described in JP-A-61-61, the tray is vibrated so as to level out the portion where the punch-out waste has become mountain-like, or as described in Japanese Utility Model Publication No. 3-21917. In some cases, a vibration type guide is provided to level the mountain-like deposition.

However, in the case of utilizing such vibrations, there remains a problem that the support structure of the tray becomes complicated and the whole bulk increases, resulting in interference with other equipment. . In addition, the generation of noise due to the vibration of the tray cannot be ignored, and if the structure is such that the tray is housed in a closed housing, the sound may be trapped and may cause discomfort.

The problem to be solved in the present invention is to reduce the size of the tray by uniformly distributing the perforated chips in the tray and to generate vibration and noise by a mechanism for leveling the perforated chips. The object of the present invention is to provide a perforation processing apparatus without the above.

[0010]

SUMMARY OF THE INVENTION The present invention is a perforation processing apparatus for perforating a filing hole in a sheet attached to an image forming apparatus main body and discharged after image formation, and penetrates a sheet conveying path. A perforation pin that reciprocates in the direction, a tray for receiving perforation waste of the sheet punched by the perforation pin, and a dispersing member for dispersing the perforation waste to the tray between the perforation pin and the tray. It is characterized by becoming.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, there is provided a guide hood for forming a space including a portion where a punch pin protrudes and retracts from a conveyance path to form a guide path for drilling chips to a tray, and the guide hood includes a dispersing member. May be provided.

[0012] The dispersing member may be formed with a mountain-shaped guide surface projecting a ridge line toward the falling flow of drilling debris from the drilling pin side. May be a steep slope and the other may be a gentle slope. The gentle slope may be provided with an opening having a size that allows drilling dust to pass therethrough.

[0013] Further, the dispersing member can be arranged so that the ridge line of the dispersing member is included in a vertical plane passing substantially through the center of the perforating pin. Can be the same as the number.

Further, the dispersing member may be operable to receive the flow of piercing waste from the piercing pin and forcibly disperse it to the tray side, and may be provided with control means for controlling the operation. In this case, the control means can switch the mode of operation of the dispersing member for each preset number of perforations by the perforation pin, and can set and change the number of perforations by the preset perforation pin. It may be included as a simple system.

[0015] The movable dispersing member may be formed into an impeller shape which receives a drilling waste stream from the drilling pin and discharges the trays in opposite directions by forward and reverse rotation around the axis thereof. A rod that is arranged with an axis that coincides with the arrangement direction of the rod and that is provided with a spiral strip protruding from the peripheral surface thereof. The forward and reverse rotation of this rod causes the flow of drilling waste from the drilling pin to interfere with the axis of the rod by the spiral strip. It can be made to be able to discharge in directions opposite to each other. In this case, the peripheral surface of the spiral strip of the rod may be located substantially the same as or slightly below the upper end of the tray.

Further, the driving of the dispersion member in the forward and reverse rotations may be connected to a drive source of a transport roll for transporting the sheet.

Further, the tray may be drawn out to the outside along the arrangement direction of the perforation pins, and an auxiliary booth may be provided at an end opposite to the drawing direction to collect overflow of perforation waste. .

[0018]

1 shows an embodiment of a perforation processing apparatus according to the present invention. FIG. 1 (a) is a longitudinal sectional view of a main part viewed in a direction orthogonal to a sheet conveying direction, and FIG. b) is A in FIG.
FIG. 4 is a vertical cross-sectional view taken along line -A.

In the figure, as shown in the conventional example, a pair of path guides 1 for guiding the path across a sheet S is shown.
Reference numerals a and 1b are provided inside a post-processing device connected to a sheet discharge portion of an image forming apparatus such as a copying machine, and a punching drive mechanism 2 of a punching device is disposed above the guide 1a. The punching drive mechanism 2 is provided with a pair of piercing pins 2a and 2b at intervals in the conveying direction of the sheet S, and the piercing pins 2a and 2b can reciprocate up and down in the figure in synchronization. The piercing pins 2a and 2b have a stroke that penetrates the lower path guide 1b.

On the lower surface of the path guide 1b, piercing pins 2a,
A guide hood 3 for collecting the perforated waste W punched out by 2b is provided, and a tray 4 for collecting the perforated waste W is incorporated below the guide hood 3.

The guide hood 3 is formed in a frame shape which defines a rectangular area including the perforated pins 2a and 2b and has an open lower end, and a portion corresponding to each of these pins 2a and 2b is provided with a perforated scrap W. A dispersion guide 3a is provided. These dispersing guides 3a are arranged across the inside of the guide hood 3 as shown in FIG. 3A, and the top ridgeline 3b is set in a vertical plane passing through the axis of the perforating pins 2a, 2b. It has a mountain-shaped vertical cross section and a uniform thickness throughout.

In the distribution guide 3a on the left side in FIG. 2B, the surface facing the center of the guide hood 3 is a steep slope 3c having a large inclination angle, and the opposite surface is a gentle slope. The slope 3d is provided with an opening 3e in the gentle slope 3d at substantially the center in the inclination direction, the size of which is small enough to allow the drilling waste W to pass therethrough. Further, the distribution guide 3a arranged on the right side has the same structure, and is formed symmetrically to the one arranged on the left side.

The tray 4 is incorporated in a housing (not shown) of the post-processing device so as to be pulled out in a direction indicated by an arrow in FIG. 2B, and includes a front plate 4a and left and right side plates 4a.
b and 4c have such a size that the lower end of the guide hood 3 can be inserted. And a back plate 4d provided on the opposite side to the front plate 4a.
Is slightly lower than the lower end of the guide hood 3, and a partition plate 4e having the same height is formed in front of the back plate 4d.
An auxiliary booth 4f is provided between the back plate 4d and the partition plate 4e.
And

In the above configuration, the supplied sheet S
When the perforating pins 2a and 2b punch out the filing holes, the perforated scrap W is dropped from the guide hood 3 to the tray 4. At this time, since the ridge 3b, which is the vertex of the dispersion guide 3a, runs immediately below the perforation pins 2a, 2b, the perforation waste W is separated from the ridge 3b in FIG.
At the right and left.

That is, the perforated scrap W falling onto the distribution guide 3a arranged on the left side in FIG. 3B is distributed to the left and right depending on the posture when falling on the ridgeline 3b and the direction of the fall. The drilling waste along the steep slope 3c is dropped into the tray 4 from a portion near the ridgeline 3b. On the other hand, the drilling waste along the gentle slope 3d is dropped into the tray 4 at a portion away from the ridgeline 3b, and at the same time, a part of the drill waste W sliding down the gentle slope 3d falls directly into the tray 4 from the opening 3e. .

By providing the dispersion guide 3a in this manner, the drilling waste W punched by the drilling pin 2a is formed.
Are dispersed in three directions, and the same distribution of perforated chips W is seen on the perforated pin 2b side. Therefore, when the perforated chips W gradually accumulate in the tray 4, they are dispersed mainly as four mountain-shaped piles as shown in FIG. 3B, and the perforated pins 2a, 2
As compared with the case where the two portions corresponding to the portion b rise greatly, the pile of the drilled waste W can be reduced. Since the drilling waste W is dropped from the opening 3e of the gentle slope 3d into the valley between these piled mountains, the drop between the mountain and the valley becomes small, and the drilling waste W in the tray 4 is reduced. Can be accommodated so that there is no part that is not satisfied.

As described above, since the distribution guide 3a can make the distribution of the perforated waste W in the tray 4 uniform in the height direction, most of the space in the tray 4 is used for storing the perforated waste W. The height and width of the tray 4 need not be increased.

When the inside of the tray 4 is full of perforated waste W, it is pulled out in the direction of the arrow in FIG. At this time, if the pile of the perforated waste W is higher than the lower end of the guide hood 3, the left end portion of the guide hood 3 scrapes off the top of the pile as the tray 4 is pulled out. As shown in the figure, a large mountain is formed on the partition plate 4e.

On the other hand, when the tray 4 is pulled out, the accumulated drilling waste W is scraped off into the auxiliary booth 4f which is the last part to be pulled out. Therefore, even if the inside of the tray 4 is excessively full, when the tray 4 is pulled out, the excess perforated waste W is collected in the auxiliary booth 4f and is prevented from leaking outside.

FIG. 2 shows an example in which the path of the sheet S goes from top to bottom. Only the shape of the guide hood 3 is different from that of the previous example, and the same members are designated by the same reference numerals. .

The guide hood 3 has its left side open and is connected to the guide 1b, and has perforated pins 2a and 2b.
The inner space is formed so as to guide the drilled waste W punched clockwise in the clockwise direction. Then, as in the previous example, the lower end is positioned so as to be slightly immersed in the tray 4, and a pair of dispersing guides 3a is arranged.
As in the previous example, it is possible to collect the perforated waste W having a high filling rate by reducing the head of the perforated waste W accumulated in the tray 4 between the pile and the valley.

FIG. 3 shows another example, in which the dispersion guide is made movable so as to forcibly disperse the perforated chips immediately after being punched out. FIG. FIG. 2B is a longitudinal sectional view taken along line CC of FIG. 1A. The tray 4 is the same as that of the previous example.

The guide hood 5 has a shape in which the side surface is connected to the path guide 1b and only the lower end is opened, and a pair of dispersion guides 5a and 5b are swung in the direction of the arrow in FIG. It is arranged as possible. These dispersion guides 5
Reference numerals a and 5b denote rectangular flat plates. A support shaft 5c is provided at one of the long sides of the support plate 5c and protrudes outward from the side wall of the guide hood 5. A drive unit 6 for rotating and driving these support shafts 5c is provided. The position of the support shaft 5c is the dispersion guide 5a arranged on the left.
Is on the left side with respect to the perforation pin 2a, and on the right side of the dispersion guide 5b, is on the right side with respect to the perforation pin 2b.

The drive unit 6 is provided with a spur gear drive gear 6b directly connected to a motor 6a and driven gears 6c and 6d meshing with the drive gear 6b and connected to a support shaft 5c. By rotating the output shaft of the motor 6a forward and backward at a fixed rotation angle by the controller, the dispersion guides 5a and 5b can be synchronized with each other and swing in the range of the arrow.

Such oscillating dispersion guides 5a, 5b
, The position of each support shaft 5c is
In the posture of the dispersion guides 5a and 5b indicated by solid lines in FIG.
And the subsequent rotation causes the drilled waste W
To the left and right sides to disperse. Then, when it is rotated to the position of the dashed line,
Since there are no dispersion guides 5a and 5b below the holes a and 2b and where the perforated waste W falls, the perforated waste W accumulates in the tray 4 as it is.

Therefore, a pair of dispersion guides 5a, 5b
Are oscillated and rotated in synchronization with each other, thereby forming a pile of four perforated scraps W as shown in the figure, and similarly to the previous example, a perforated hole with a small filling head and a valley with a high filling rate. Scrap W can be collected.

FIG. 4 shows still another example in which the rotation drive mechanism of the dispersion guide is connected to the transport mechanism of the sheet S, and the tray 4 is the same as that of the previous example.

As shown in FIG. 3, a guide hood 7 having only its lower end side opened is provided with its support shaft 7b in which
A pair of cross-shaped dispersion guides 7a are provided coaxially with the perforation axes a and 2b. And the guide hood 7
Are provided with a spur toothed driving gear 8a and driven gears 8b and 8c meshing with the driving gear 8a, and a supporting shaft 7b is connected to the driven gears 8b and 8c.

A bevel gear 8a-1 is coaxially connected to the drive gear 8a, and a bevel gear 9 meshed with the bevel gear 8a-1.
The drive shaft 9 provided with a is disposed. The drive shaft 9 uses a drive mechanism for rotating a roller (not shown) that conveys the sheet S as a common drive source, and an outline of the drive mechanism is shown in FIG.

The driving mechanism 10 includes a driving shaft 9 for oscillatingly rotating the dispersion guide 7a, and a sheet conveyer arranged at a path portion of the sheet S for discharging the sheet S from the image forming apparatus and sending the sheet S to the perforation processing apparatus. The rotation is transmitted to a transport drive shaft 10a that rotationally drives a roller (not shown).
A motor 10b is provided as a drive source.

A drive gear 10c is connected to the output shaft of the motor 10b.
And the driven gear 10d of the transport drive shaft 10a.
Mesh with. Further, the transport drive shaft 10a and the drive shaft 10
Between them, an intermediate shaft 10e is arranged, and a gear 10g is attached thereto via an electromagnetic clutch 10f, and this gear 10g is meshed with a drive gear 10c. Further, a gear 10h is integrally attached to the intermediate shaft 10e.
0h through an intermediate gear 10i meshing with the driven gear 10j
Is integrally fixed to the drive shaft 9, and a gear 10k meshing with the gear 10g is provided on the drive shaft 9 via an electromagnetic clutch 10m.

In such a drive mechanism 10, the electromagnetic clutch 10f is turned off and the other electromagnetic clutch 10f is turned off.
When m is turned on, the gear 10g is in a free rotation state with respect to the intermediate shaft 10e. Therefore, as shown in FIG. 5B, the gear 10g is viewed from the direction of arrow A in FIG. The gear 10k of the drive shaft 9 meshing with the counterclockwise rotation rotates clockwise. At this time, since the electromagnetic clutch 10m is on, the rotation of the gear 10k is transmitted to the drive shaft 9 via the electromagnetic clutch 10a and rotates clockwise.

On the other hand, when the electromagnetic clutch 10f is turned on and the other electromagnetic clutch 10m is turned off, the gear 10
The rotation of g is transmitted to the intermediate shaft 10e via the electromagnetic clutch 10f, and the gear 10h rotates counterclockwise as shown in FIG. Accordingly, the intermediate gear 10i rotates clockwise, and the driven gear 10j meshing with the intermediate gear 10i drives the drive shaft 9 to rotate counterclockwise. At this time, since the electromagnetic clutch 10m is off, the drive shaft 9 and the gear 10k rotate in opposite directions.

By alternately turning on and off the electromagnetic clutches 10f and 10m in this manner, the rotation direction of the drive shaft can be reversed, and the motor 10b of the transport drive shaft 10a for rotating the roller for transporting the sheet S is driven. Can be used as a common drive source for reciprocating rotation of the drive shaft 9.

Returning to FIG. 4, when the driving mechanism 9 drives the drive shaft 9 to rotate forward and reverse at a rotation angle of, for example, about 90 °, the dispersion guide 7a having cross-shaped blades is turned to the arrow shown in FIG. Rocks in the direction. As a result, the perforation waste W caught between the blades of the dispersion guide 7a after being punched by the perforation pins 2a and 2b is distributed to the left and right and discharged. Therefore, similarly to the previous example, the piled pile is formed at four places, and the piled-up waste W having a small head with respect to the valley can be deposited, and the drilled hole having a sufficient capacity can be obtained without supplementing the height of the tray 4. The waste W can be stored.

Here, in the example shown in FIG. 4, the impeller-shaped dispersion guide 7a is swung by the forward and reverse rotation of the drive shaft 9 as shown in FIG. Sorted left and right. In such an operation, it is not necessary to constantly rotate the drive shaft 9 by dropping the perforated chips between the blades and distributing them all at once when they accumulate to a certain extent. Therefore, if the number of times of punching by the punching drive mechanism 2 is input to the controller, and the number of times of punching is set to, for example, about 10 times, the drive shaft 9 is rotated in the normal or reverse direction, it is possible to sort the holes to the left or right. Becomes

FIG. 6 is a flowchart for controlling the driving of the driving mechanism 10 based on the number of perforations. As described above, the number of perforations of the punching drive mechanism 2 is counted, and the accumulated perforation waste W is periodically distributed to the left and right by the forward / reverse rotation of the drive shaft 9 by the drive mechanism 10 at every set number of times. Can be. That is, for example, 1
When the zero drilling is completed, the dispersion guide 7a is rotated clockwise to discharge the drilling waste in that direction, and when the next ten drilling is completed, the dispersion guide 7a is rotated counterclockwise to reverse the drilling waste. Can be released.

Further, it is also possible to provide a system capable of inputting an upper value of the number of perforating members for the dispersion member drive control so that the number of perforations serving as a reference for switching the rotation direction of the dispersion guide 7a can be changed. In this case, for example, instead of switching the rotation direction of the dispersion guide 7a every ten perforations, an operation of switching every 20 perforations may be performed. Therefore, under the condition that the capacity of the tray 4 can be relatively large, even if the number of perforations is increased, there is no hindrance in accommodating the perforation. Will be improved.

FIG. 7 shows still another example, in which the lower end of a guide hood 11 having the same shape as that shown in FIG.
And a dispersing member 11a having an axis coinciding with the center of the tray 4 in the width direction is rotatably provided. This dispersing member 11a is the guide hood 1
A rod 11b protruding to the outside of FIG. 1 and connected to a rotary drive mechanism (not shown) such as a motor, and a spiral strip 11c formed in a spiral shape on its peripheral surface are formed.

The rod 11b is driven to rotate forward and reverse around its axis, and the lead of the spiral strip 11c is positioned at the neutral point just below each of the drilling pins 2a and 2b within the rotation angle range of the rod 11b. In the case of b), the traverse can be performed in the left-right direction. The projecting length of the rod 11b of the spiral strip 11c is set to be sufficient to catch the drilling waste W punched out by the drilling pins 2a and 2b and to be able to scrape off the surface deposited in the tray 4.

In this example, the rod 11 of the dispersion member 11a is
When b is rotated in the forward and reverse directions, the spiral strip 11c traverses left and right, so that the drilling waste W falling from the drilling pins 2a and 2b can be swung right and left while being hooked on the spiral strip 11c. Therefore, FIG.
In the same manner as in the case of the above example, the tray 4 can be filled so that four pits of the pits W are formed in the tray 4, and the pits between the piled pits are small, and the pits with a high filling rate are small. W
Can be recovered.

When the perforated waste W accumulates in the tray 4, the central portion in the width direction of the tray 4 becomes highest as shown in FIG. This is the same for the peaks and the valleys. Therefore, the drilling waste W is deposited such that the center in the width direction of the peaks is the top.

FIG. 8 shows the accumulation of the perforated waste W.
Since the dispersion member 11a extends over the entire length in the longitudinal direction of the tray 4 as shown in FIG. 7, the rod 11b and the spiral strip 11c come into contact with the deposits of the perforated waste W with the accumulation of the perforated waste W. Then, since the rod 11b rotates forward and backward, the spiral strip 11c on the peripheral surface of the rod 11b scrapes the upper surface of the deposit, and the top portion of the perforated waste W is leveled both in the width direction and in the longitudinal direction of the tray 4. To go. Therefore, FIG.
(B), the entire tray 4 can be formed as a pile of perforated scrap W having substantially the same height, instead of the filling that is divided into peaks and valleys as shown in FIG. Can be enhanced.

Further, even when the perforated waste W becomes full, the pile of the sediment protruding from the upper end of the tray 4 is formed.
Since the tray 1a is suppressed by itself, overflow when the tray 4 is pulled out is also prevented.

[0055]

According to the present invention, there is provided a dispersion member for uniformly dispersing the perforated waste stream toward the tray side. Therefore, the perforated waste can be removed from the empty state until the tray becomes full. And the tray can be reduced in size by increasing the filling efficiency. For this reason, the volume occupied by the tray in the post-processing device is reduced, and interference with other devices can be suppressed, and the degree of freedom in layout can be improved.

In the case where the tray is pulled out and the auxiliary booth is provided, even if the tray is pulled out when the tray is full of perforated waste, the overflow of perforated waste is collected in the auxiliary booth. No perforation scraps enter the interior of the device, and cleaning and maintenance are simplified.

[Brief description of the drawings]

FIG. 1 is an embodiment of a perforation processing apparatus of the present invention,
(A) of the same figure is a longitudinal sectional view of a main part viewed in a direction orthogonal to the sheet conveying direction, and (b) of the same figure is a longitudinal sectional view taken along line AA of the same figure (a). . FIG. 3 is a plan view illustrating a main part of the toner supply device.

FIGS. 2A and 2B are examples of a path for conveying a sheet from top to bottom. FIG. 2A is a longitudinal sectional view of a main part, and FIG. It is a longitudinal cross-sectional view by the arrow B.

3 (a) is a cross-sectional view showing a main part thereof, and FIG. 3 (b) is a line CC of FIG. 3 (a). It is a longitudinal sectional view by an arrow.

4A and 4B show an example in which a swinging cross-shaped blade is provided as a dispersing member. FIG. 4A is a cross-sectional view showing a main part thereof, and FIG. FIG. 4 is a vertical sectional view taken along line DD of FIG.

FIG. 5 is a schematic diagram of a drive system for rotationally driving a drive shaft in the example of FIG.

FIG. 6 is a control flow in the example of FIG. 4;

7A and 7B are examples in which a rod having a spiral strip is used as a dispersion member, wherein FIG. 7A is a longitudinal sectional view of a main part, and FIG. 7B is a line EE of FIG. It is a longitudinal sectional view by an arrow.

8 is a view showing a state in which the upper surface of the perforated waste is leveled in the example of FIG. 7, wherein FIG. 8 (a) is a longitudinal sectional view of a main part, and FIG. 1 is a vertical sectional view taken along line FF of FIG.

9 (a) is a longitudinal sectional view of a main part, and FIG. 9 (b) is a longitudinal sectional view taken along line XX of FIG. 9 (a).

[Explanation of symbols]

 1a, 1b: Path guide 2: Punching drive mechanism 2a, 2b: Drilling pin 3: Guide hood 3a: Dispersion guide 3b: Ridge 3c: Steep slope 3d: Slow slope 3e: Opening 4: Tray 4f: Auxiliary booth 5: Guide hood 5a , 5b: dispersion guide 6: drive unit 7: guide hood 7a: dispersion guide 8a: drive gear 8b, 8c: driven gear 9: drive shaft 10: drive mechanism 11: guide hood 11a: dispersion member 11b: rod 11c: spiral strip. S: Sheet

Claims (15)

[Claims] 1. A perforation processing device for perforating a filing hole in a sheet attached to an image forming apparatus main body and discharged after image formation, comprising: a perforation pin that reciprocates in a direction penetrating a sheet conveyance path; A tray for receiving perforated scraps of a sheet punched by the perforated pins, and a perforation processing device in an image forming apparatus including a dispersing member for dispersing perforated debris into the tray between the perforated pins and the tray . 2. A guide hood for creating a space including a portion where a perforation pin protrudes and retracts from a transport path to form a guide path for perforated chips to a tray, and the guide hood includes a dispersion member. A perforation processing apparatus in the image forming apparatus described in the above. 3. A perforation process in an image forming apparatus according to claim 1 or 2, wherein the dispersion member forms a mountain-shaped guide surface that protrudes a ridge line toward a falling flow of perforation waste from the perforation pin side. apparatus. 4. The perforation processing apparatus in an image forming apparatus according to claim 3, wherein one of the guide surfaces of the mountain-shaped dispersion member is a steep slope and the other is a gentle slope with the ridgeline as a boundary. 5. The perforation processing device in an image forming apparatus according to claim 4, wherein an opening having a size through which perforation dust can pass is provided on a gentle slope of the dispersion member. 6. A perforation processing apparatus in an image forming apparatus according to claim 3, wherein the ridge line of the mountain-shaped dispersion member is included in a vertical plane passing substantially through the center of the perforation pin. 7. A perforation processing apparatus in an image forming apparatus according to claim 6, wherein a plurality of perforation pins are arranged at intervals from each other, and the number of dispersion members having a mountain-shaped guide surface is equal to the number of perforation pins. 8. The dispersing member is operable to receive a flow of perforated scraps from the perforated pin and forcefully disperse the perforated debris to the tray side, and further comprises control means for controlling the operation.
Or a perforation processing device in the image forming apparatus according to 2. 9. The perforation processing apparatus in an image forming apparatus according to claim 8, wherein the control means is capable of switching the mode of operation of the dispersing member for each preset number of perforations by the perforation pins. 10. The perforation processing apparatus in an image forming apparatus according to claim 9, wherein the control means includes a system capable of setting and changing the number of perforations by a pre-set perforation pin. 11. The impeller according to claim 8, wherein the dispersing member is shaped like an impeller that receives a flow of scum from the piercing pin and discharges the trays in opposite directions by forward and reverse rotation around the axis. A perforation processing apparatus in the image forming apparatus according to any one of the above. 12. The dispersing member is a rod which is arranged with an axis line coinciding with the arrangement direction of the perforating pins and is provided with a spiral strip protruding from a peripheral surface thereof. The perforation processing apparatus in the image forming apparatus according to any one of claims 8 to 10, wherein the scrap flow can be discharged in directions opposite to each other in the axial direction of the rod by interference of the spiral strip. 13. The perforation processing apparatus in an image forming apparatus according to claim 12, wherein the peripheral surface of the spiral strip of the rod is located substantially the same as or slightly below the upper end of the tray. 14. A driving mechanism for driving the dispersion member in the forward and reverse rotations is connected to a drive source of a transport roll for transporting a sheet.
14. A perforation processing apparatus in the image forming apparatus according to any one of claims to 13. 15. The apparatus according to claim 1, wherein the tray can be pulled out to the outside along the arrangement direction of the perforated pins, and an auxiliary booth for collecting overflow of perforated chips is provided at an end opposite to the drawing direction. 15. A perforation processing apparatus in the image forming apparatus according to any one of 14.