JPH0890452A - Binding needle extracting device - Google Patents

Abstract

PURPOSE: To provide a binding needle extracting device capable of automatically extracting a binding needle of binding a plurality of paper sheaves without damaging this paper. CONSTITUTION: A wedge unit 16 is rotated, to stop its point end circular arc- shaped wedge part 16a advanced between an upper surface of paper 4 and a binding needle 3 attached to this paper, and the binding needle 3 is automatically extracted from the paper 4, to drop down this extracted binding needle 3 to a needle storage box 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binding-needle extracting device for automatically extracting binding needles for binding paper.

[0002]

2. Description of the Related Art A stapler is often used for binding a plurality of sheets of paper and binding them in an office, a general home, a school or the like. The stapler binds paper with binding staples, but sometimes the staples have to be removed from the bound paper. For this reason, there has been used a binding-needle extracting device capable of manually removing the binding needle that binds paper. However,
In such a conventional binding-needle extracting device, the binding-needle extracting operation needs to be performed only manually, and thus the operation is inevitably troublesome.

There has also been proposed an apparatus for removing the binding needle from the paper by automatically pulling out the binding needle together with the surrounding paper portion. According to this apparatus, a part of the paper is removed together with the binding needle. Therefore, the problem of damaging the paper cannot be avoided.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to propose a binding needle extracting device capable of automatically extracting the binding needle from the paper without damaging the paper. is there.

[0005]

In order to achieve the above-mentioned object, the present invention provides a needle position detecting means for detecting the position of a binding needle that binds paper, and a binding needle engaged with the binding needle to fix the binding needle. A needle pull-out member for pulling out from the paper, a needle pull-out member moving means for moving the needle pull-out member to a position facing a binding stapler binding the paper based on the detection result of the needle position detection means, and the needle pull-out member There is proposed a binding needle extracting device comprising: a needle extracting member operating means for operating between the position facing the binding needle binding the paper and the position engaging with the binding needle.

In this case, in addition to the above configuration, the binding needle tilt detecting means for detecting the tilt state of the binding needle binding the paper with respect to the paper width direction, and the needle extracting member tilting based on the detection result of the detecting means. It is particularly advantageous to provide a means for tilting the needle withdrawal member.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a vertical cross-sectional view of a binding needle extracting device 100 according to an embodiment of the present invention, and FIG. 2 is a plan view thereof, and in both drawings, some elements of the device are not shown. Moreover, in FIG. 2, some elements are shown broken away.

As shown in FIG. 1, a binding needle extracting device 1
00 has a casing 1 and a paper insertion slot 2 on one side thereof.
Are formed. A bundle of a plurality of papers 4 bound by the binding needle 3 is manually inserted into the casing 1 through the insertion opening 2 as indicated by an arrow a. When the paper 4 is thus inserted, the front end of the paper 4 is detected by the photo sensor 5 fixed to the casing 1, and then the paper 4 is inserted.
Is stopped by its end hitting the stop portion 6a at the end of the stopper 6.

The stopper 6 has a rear end portion which is the casing 1.
Is pivotally mounted to a holder of a solenoid 7 fixed to the bottom wall of the stopper 7, and each end of a tension spring 8 is locked between the rear end of the stopper 6 and the casing 1. The spring 8 biases the stopper 6 in such a direction that the stop portion 6a moves upward, and is normally held at the position shown in FIG.

A first conveying roller 9 is arranged above the stop portion 6a of the stopper 6, and a second conveying roller 10 is arranged below it. These rollers 9 and 10 extend in parallel to each other, and the ends of the roller shafts of the rollers 9 and 10 are, as shown in FIG.
1 is rotatably supported. At that time, the first conveying roller 9 is fixedly supported by the side plates 11 and 11 via bearings, but the second conveying roller 10 can approach or separate from the first conveying roller 9. It is supported by both side plates 11, 11 via bearings not shown. As shown in FIG. 2, the roller shaft of the first transport roller 9 is one side plate 1
1 is connected to a gear 13 via an electromagnetic clutch 12 fixed to the gear 1. The gear 13 is drivingly connected to a motor (not shown), and is rotationally driven by the motor.

As described above, until the paper 4 is inserted into the casing 1 and the leading end thereof comes into contact with the stop portion 6a and stops, the second conveying roller 10 is the first conveying roller as shown by the solid line in FIG. It occupies the lower position away from 9.
After a lapse of a predetermined time after the photo sensor 5 detects the leading edge of the paper 4, a driving device (not shown) that moves the second transport roller 10 up and down is activated, whereby the second transport roller 10 is activated.
Rises to the position shown by the chain line in FIG.
The front end of the paper 4 is pinched in cooperation with. The state of the paper 4 at this time is shown by the one-dot chain line in FIG. Second transport roller 10
As a driving device for vertically moving, a well-known configuration such as a slide wedge (not shown) that is brought into pressure contact with the roller shaft of the second transport roller 10 to raise or lower it is appropriately adopted.

At the same time that the second transport roller 10 approaches the first transport roller 9 to nip the paper 4, the solenoid 7
The stopper 6 is attracted by the solenoid 7 by this, and the stopper 6 is rotated against the action of the tension spring 8 in a direction in which the stop portion 6a is retracted downward.

In this example, the first conveying roller 9 has a half-moon-shaped cross section as shown in FIG. 1, and the arc-shaped outer peripheral surface of the first conveying roller 9 and the peripheral surface of the second conveying roller 10 are Paper 4
2, the electromagnetic clutch 12 shown in FIG. 2 is turned on, whereby the rotation of the gear 13 is transmitted to the first transport roller 9, and the roller 9 feeds the paper 4 toward the inside of the casing 1, That is, it is driven to rotate clockwise in FIG. In this way, the second occupying the raised position
The conveyance roller 10 is driven to rotate in the counterclockwise direction in FIG. 1, and the paper 4 is conveyed toward the inside of the casing 1 while being sandwiched between the conveyance rollers 9 and 10. At this time, the paper 4 is guided while being supported by the paper tray 14.

When the binding needle 3 for binding the paper 4 reaches the needle groove 15 formed in the paper receiving base 14, the electromagnetic clutch 12 is turned off and the rotation of the first conveying roller 9 is stopped, so that the paper 4 is rotated as shown in FIG. 1. Stop at the position indicated by the broken line in FIG. At this time, as shown in FIG. 3, the binding needle 3 binding the paper 4 has its end portions 3 a directed downward, and these end portions 3 a fall into the needle groove 15. The intermediate portion 3b of the binding needle 3 is positioned facing upward.

A wedge body 16 having a substantially circular external shape is arranged above the needle groove 15, and the wedge body 16 has an arcuate wedge portion 16a whose tip is sharply pointed. Wedge 16
Is an example of a configuration of a needle extracting member that extracts the binding needle 3 from the paper 4. When the paper 4 is fed to the position indicated by the broken line as described above, the wedge portion 16a of the wedge body 16 is separated from the paper 4, but when the binding needle 3 falls into the needle groove 15 and the paper 4 stops, the wedge 4 is cut. The body 16 is driven to rotate clockwise by a predetermined angle in FIG.
As shown in FIG. 3, the paper 4 is inserted between the upper surface of the paper 4 and the intermediate portion 3 b of the binding needle 3. Since the wedge portion 16a is formed in an arcuate taper shape in which the thickness is gradually reduced toward the tip thereof, as the wedge body 16 rotates, the wedge portion 16a and the intermediate portion 3b of the binding needle 3 are formed. The upper surface of the paper 4 is separated from the upper surface of the paper 4, and the binding needle 3 is finally pulled out from the paper 4. In this state, the rotation of the wedge body 16 is stopped. In this way, the wedge body 16 which is one structural example of the staple removing member engages with the binding needle 3 binding the paper 4 and pulls out the binding needle 3 from the paper 4.

Here, the binding-needle extracting device 100 shown in FIG. 1 is assembled to the automatic document feeder 17 mounted on the main body of the copying machine (not shown), and the binding needle 3 is removed as described above. When the electromagnetic clutch 12 is turned on, the first conveying roller 9 is rotated again in the clockwise direction to further convey the bundle of papers 4 leftward in FIG. And
When the leading edge of the paper 4 reaches the area before the document feeding roller 18 of the automatic document feeder 17 and the separation pad 9 pressed against the paper feeding roller 18, the rotation of the first feeding roller 9 is stopped, and the paper 4
Is stopped at that position. In this state, the second transport roller 10 descends to the position shown by the solid line in FIG.

Next, the document feeding roller 18 is driven to rotate in the counterclockwise direction in FIG.
One of the plurality of papers 4 is conveyed in the direction of arrow c by the cooperation with 9, and a predetermined number on a contact glass (not shown) provided on the upper portion of the copying machine main body by the conveyance belt 20. Sent to the position. In this state, the image written on the fed paper 4 is copied. Similarly, the sheets of paper 4 are sequentially fed onto the contact glass one by one and copied.

When all the paper 4 has been sent out, the wedge body 16 rotates counterclockwise and returns to the initial rotation position shown in FIG. At the time of this operation, the binding needle that has been pulled out from the paper 4 and hooked on the wedge portion 16a falls into the needle storage box 21 provided in the paper receiving tray 14 and is stored there. In this way, after feeding all the papers 4, the wedge body 16 is rotated counterclockwise so that the binding needle that has been caught by the wedge portion 16a until then is dropped into the needle storage box 21. Therefore, there is no possibility that the binding needle will be sent to the document feeding roller 18 together with the paper 4 as the paper 4 is conveyed, and it is possible to prevent the binding needle from damaging these elements.

The binding needle extracting device 100 is assembled to an image forming apparatus other than a copying machine, for example, an automatic document feeder of a facsimile, and each of the sheets 4 is image-reading section of a facsimile main body not shown in the same manner as described above. It is also possible to convey the image to each of the papers 4 and read the image. It is also possible to incorporate the binding needle extracting device 100 into a shredder and cut the paper 4 from which the binding needle 3 has been removed. In this case, for example, a roller cutter may be provided instead of the document feeding roller 18 shown in FIG. 1, and the paper 4 may be finely cut by this cutter.

It is also possible to use the binding-needle extracting device 100 without connecting it to an image forming device such as a copying machine or a facsimile or a shredder, and to use it exclusively for removing the staple. In this case, the document feeding roller 18, the separation pad 19, the roller cutter, etc. are omitted, and after the binding needle 3 is pulled out from the paper 4 by the rotation of the wedge body 16 as described above, the wedge body 16 is immediately removed. It is rotated counterclockwise in FIG. 1 and returned to the initial rotation position shown in FIG. The stapled staples 3 that have been removed fall naturally into the needle storage box 21. At the same time, the second transport roller 10 is lowered. The paper 4 is manually pulled in the direction opposite to the arrow a and pulled out from the casing 1.

The schematic configuration and operation of the illustrated binding needle extracting device 100 are as described above. When the binding needle 3 is removed by using the binding needle extracting device 100, the binding needle 3 is placed at any position on the paper 4. If the wedge 16 is brought to a position facing the binding needle 3 based on the detection result and the binding needle 3 is not extracted, the binding needle 3 is automatically detected. It cannot be extracted. This is because the position of the binding needle 3 with respect to the paper 4 generally differs in each case and is not constant.

Therefore, the illustrated binding needle removing device 10 is shown.
In addition to the needle extracting member composed of the wedge body 16, 0 is a needle position detecting means for detecting the position of the binding needle 3 binding the paper 4, and the needle extracting member based on the detection result of the detecting means. Is provided with a needle extracting member moving means for moving the sheet to a position facing the binding needle 3 binding the paper 4. A specific example will be described below.

As shown in FIG. 2, on the peripheral surface of the above-mentioned first conveying roller 9, a large number of linear members are arranged at equal intervals in the longitudinal direction thereof, that is, in the paper width W direction orthogonal to the forward direction of the paper 4. The sensor made of the electric conductor 22 is fixed. In this example, the intervals between the conductors 22 are set to be narrower than the length of the binding needle 3. The conductors 22 are not electrically connected to each other and are in an insulated state from each other.

As described above, when the second carrying roller 10 moves up, the carrying roller 10 comes into pressure contact with the first carrying roller 9 through the paper 4, and the first carrying roller 9 rotates clockwise in FIG. The binding needle 3 contacts two conductors of the many conductors 22. The state of the paper 4 at this time is shown in FIG.
In the example shown here, the binding needle 3 shown by the chain double-dashed line is in contact with the two conductors 22a and 22b. Therefore, these conductors 2
2a and 22b are electrically connected via the binding needle 3 which is also made of a conductor. The detection signal at this time is determined by each conductor 22.
It is sent to the CPU of the control unit (not shown) via the flexible printed circuit board 23 connected to, and it is detected which of the two conductors 22 is in the conductive state, and the position of the binding needle 3 is detected by this. To be done.

Thus, in this example, the first transport roller 9
A needle position detection unit that detects the position of the binding needle 3 that binds the paper 4 is configured by the sensor including a large number of conductors 22 provided in the, the flexible printed board 23, and the control unit including the CPU. . In the present example, since a large number of conductors 22 constituting the needle position detecting means are provided on the first transport roller 9, the first transport roller 9 serves to transport the paper 4 and also the position of the binding staple 3 thereof. There is no detection function, and the entire structure can be simplified.

On the other hand, as shown in FIG. 2, the feed screw shaft 24 is provided on both side plates 11 and 11 which are spaced apart from each other and arranged in parallel.
Each end of is rotatably supported via bearings, and the feed screw shaft 24 extends parallel to the first and second conveying rollers 9 and 10. In this example, as shown in FIG. 4, a feed screw shaft 24 having a quadrangular cross-sectional shape is used, and a screw is formed at each corner. The feed screw shaft 24 is connected to a gear 26 via an electromagnetic clutch 25 fixed to the one side plate 11.
Is drivingly connected to a motor (not shown), and is rotationally driven by the motor. This gear 26 is the same as the gear 13 described above.
Mesh with each other, and these gears 13,
It is also possible to configure 26 to be rotationally driven.

As shown in FIG. 5, an internal thread of a nut member 27 is threadably engaged with the feed screw shaft 24, and the nut member 2
The wedge body 16 described above is integrally attached to 7 as shown by the chain line in FIG. It is also possible to form a female screw on the wedge body 16 and directly screw the female screw to the feed screw shaft 24 to omit the nut member 27. Further, as shown in FIG. 5, a tubular support member 28 is provided adjacent to the nut member 27. The support member 28 is not rotatable relative to the feed screw shaft 24, but is fitted to the feed screw shaft 24 so as to be movable in the axial direction. In this example, the feed screw shaft 2
Since 4 has a quadrangular cross-sectional shape, the center hole of the support member 28 fitted into this also has a quadrangular cross-sectional shape, so that the support member 28 is relatively positioned with respect to the feed screw shaft 24. Of the lead screw shaft 24 and can slide along the axial direction of the feed screw shaft 24.

An electromagnetic coil portion 29 of the electromagnetic clutch is supported by the above-mentioned support member 28, as shown by a chain line in FIG. As shown in FIGS. 2 and 6, a tongue piece 30 integrally attached to the casing of the electromagnetic coil portion 29 is engaged with the guide rod 31. This guide rod 3
1 is fixed to both side plates 11, 11 and has a feed screw shaft 2
4 extends in parallel with 4. With this configuration, rotation of the electromagnetic coil unit 29 is blocked. On the other hand, the support member 2
As described above, 8 rotates integrally with the feed screw shaft 24. Therefore, the electromagnetic coil portion 29 and the supporting member 28 that supports the electromagnetic coil portion 29 are assembled so as to be rotatable relative to each other. Therefore, it can move along the feed screw shaft 24. Further, the support member 28 and the above-mentioned nut member 27 are connected by a connecting member (not shown in FIG. 1) 32 as shown in FIG. 5, and the support member 28 and the nut member 27 are arranged in the axial direction of the feed screw shaft 24. Are assembled together so as not to be separated.

Here, the nut member 27 shown in FIG.
The wedge body 16 integrally supported by this, the supporting member 28 connected to the nut member 27 via the connecting member 32, and the electromagnetic coil portion 29 supported by the supporting member 28 are collectively referred to as a moving unit. Assuming that 33 is attached, the moving unit 33 is located at the home position shown by the chain line in FIG. 2 when the binding needle extracting device 100 is inactive.

As described above, the insertion opening 2 is provided in the casing 1.
When the leading end of the paper 4 is inserted from the position, the position of the binding needle 3 of the paper 4 is detected by the above-described needle position detection means. Based on the detection result, the electromagnetic clutch 25 is activated by a command from the CPU. Turn on. As a result, the rotation of the motor is transmitted through the gear 26 and the electromagnetic clutch 25 to the feed screw shaft 24.
The screw shaft 24 is driven to rotate clockwise in FIG. 1 for a time corresponding to a predetermined number of pulses of the motor. When the feed screw shaft 24 rotates in this manner, the nut member 27 does not rotate until a time immediately before the rotation is stopped, and therefore the nut member 27 together with the wedge body 16 extends along the feed screw shaft 24 in FIG. Move in the direction indicated by d. Then, when the wedge body 16 reaches a position facing the binding needle 3 of the paper 4 as shown in FIG.
5 is turned off, whereby the rotation of the feed screw shaft 24 is stopped and the moving unit 33 is stopped at that position.

As described above, in this embodiment, the motor, the electromagnetic clutch 25, the feed screw shaft 24, and the nut member 27 detect the needle extracting member, that is, the wedge body 16 and the paper 4 based on the detection result of the needle position detecting means. A needle extracting member moving means for moving the binding needle 3 to a position facing the binding needle 3 is formed.

As described above, when the nut member 27 moves along the feed screw shaft 24 in the direction of arrow d, the nut member 2
The support member 28 connected to 7 and the electromagnetic coil portion 29 supported by the support member 28 also move in the arrow d direction together with the nut member 27. The entire moving unit 33 moves in the direction of arrow d. At this time, the support member 28 rotates together with the feed screw shaft 24, and the electromagnetic coil portion 29 does not rotate due to the action of the tongue piece 30 and the guide rod 31 described above. Further, during this movement, the coil of the electromagnetic coil unit 29 is not excited until the time immediately before the feed screw shaft 24 stops rotating. As described above, since the electromagnetic coil portion 29 does not rotate during its movement, there is no problem that the lead wire (not shown) for supplying current to the coil portion 29 is twisted unnaturally. .

At a time point immediately before the wedge body 16 reaches the position facing the binding needle 3, that is, a time point immediately before the rotation of the feed screw shaft 24 is stopped, a current is supplied to the coil of the electromagnetic coil section 29, whereby. Due to the magnetic force generated, the support member 28 made of a magnetic material and the nut member 27 are coupled to each other. At this time, since the support member 28 is still rotating together with the feed screw shaft 24, the nut member 27 coupled to the support member 28 rotates around the axis of the feed screw shaft 24 together with the support member 28 in the clockwise direction in FIG. Rotate to. Therefore, the wedge body 16 integrally connected to the nut member 27 rotates in the same direction, which causes the wedge portion 16a to stop at the position shown by the broken line in FIG. 1 as described in detail above. The binding needle 3 of the paper 4 on which the paper 4 is attached is removed from the paper 4. When the binding needle 3 is completely removed, the electromagnetic clutch 25 is turned off, the rotation of the feed screw shaft 24 is stopped, and the wedge body 16 is stopped.

To return the wedge body 16 to the initial rotation position shown by the solid line in FIG. 1, the motor is rotated in the reverse direction and the electromagnetic clutch 25 is turned on. This causes the feed screw shaft 24 to rotate counterclockwise in FIG. At this time as well, the electromagnetic coil portion 29 is excited, so that the nut member 27 rotates counterclockwise in FIG. 1 together with the support member 28 coupled thereto, and the wedge body 16 returns to the initial rotation position shown in FIG. Be done.

At this point, the energization of the electromagnetic coil portion 29 is cut off and the excitation is released. Therefore, the nut member 27
Then, the rotation of the wedge body 16 is stopped. Continue to feed screw shaft 2
4 is rotationally driven in the counterclockwise direction in FIG. 1, whereby the nut member 27 moves in the direction opposite to the arrow d without rotating, and the entire moving unit 33 is returned to the home position shown by the chain line in FIG. Be done. At this time, the electromagnetic clutch 25 is turned off and the rotation of the feed screw shaft 24 is stopped.

As can be seen from the above description, in the illustrated embodiment, the electromagnetic coil portion 29 and its supporting member 28 are provided.
And the nut member 27 constitute an electromagnetic clutch,
The electromagnetic clutch, the feed screw shaft 24, another electromagnetic clutch 25, and the motor position the wedge body 16 which is an example of a staple extracting member, at a position facing the binding needle 3 binding the paper 4 and its position. An example of a needle extracting member operating means that is operated between the position where the binding needle 3 is engaged and the position where the binding needle 3 is engaged is configured.

The base end of a leaf spring 34 for positioning is fixed to the wedge body 16 or the nut member 27 as shown in FIGS. 1, 2 and 7, and the wedge body 16 is shown in FIG. When in the initial rotation position, the recessed end of the leaf spring 34 engages with the guide rod 31 to hold the wedge body 16 in the initial rotation position. Therefore, when the electromagnetic coil portion 29 is not excited, the nut member 27 and the wedge body 16 are prevented from rotating together with the feed screw shaft 24, and these are held at the initial rotation position shown in FIG. On the other hand, when the electromagnetic coil portion 29 is excited as described above and the wedge body 16 rotates clockwise from the initial rotation position of FIG. 1 together with the nut member 27, the leaf spring 34 elastically deforms and moves from the guide rod 31. Come off. When the wedge body 16 returns to the initial rotation position shown in FIG.
Engage 1. As a result, the wedge body 16 can be correctly positioned and stopped at the initial rotation position.

The wedge body 16 may be rotatably supported by the nut member 27. In this case, when the wedge body 16 is rotated from its initial rotation position or returned to that position, the support member 2 is excited by exciting the electromagnetic coil portion 29.
8 and the wedge body 16 may be coupled by their magnetic force, the wedge body 16 may be rotated by the rotation of the support member 28, and the nut member 27 may not be rotated.

By the way, in the example shown in FIG. 2, the binding needle 3 binding the paper 4 is positioned in the direction of the paper width W, but the binding needle 3 is always attached to the paper 4 in this way. Not necessarily located. That is, as shown in FIG.
The binding needle 3 that binds the paper may be inclined with respect to the paper width W direction of the paper 4. In such a case, when the binding needle 3 is to be pulled out by the rotation of the wedge body 16 as described above, the wedge portion 16a is properly moved to the intermediate portion 3 of the binding needle 3.
There is a case where the binding needle 3 cannot be pulled out from the paper 4 without entering between b and the upper surface of the paper 4.

Therefore, in the binding needle extracting device 100 of the embodiment shown in FIGS. 8 to 10, the tilted state of the binding needle 3 binding the paper 4 with respect to the paper width W direction is detected, and based on the detection result. , A wedge body 16 which is a needle extracting member
Is tilted to face the binding needle 3 so that the binding needle 3 can be reliably pulled out from the paper 4. The specific configuration is as follows.

The second transport roller 10 shown in FIGS. 8 and 9.
Similarly to the case of FIGS. 1 and 2, the two side plates 11 and 11 (see FIG. 2) are movably supported in the vertical direction, but the second transport roller 10 shown in FIG. That is, a large number of conductor sensor portions 35 arranged at predetermined intervals are provided in the paper width W direction orthogonal to the traveling direction of the paper 4 inserted in the casing 1. The conductor sensor portions 35 are not electrically connected to each other and are insulated from each other, and the conductor sensor portions 35 extend annularly in the circumferential direction of the transport roller 10 so that the conductor sensor portions 35 between An annular groove is formed in the roller portion. In addition, each conductor sensor portion 35 is located so as to face each of the above-described conductors 22 provided on the first transport roller 9.

Just as in the previous embodiment, the paper 4 inserted into the casing 1 through the insertion port 2 thereof, and the paper 4 sandwiched between the raised second conveying roller 10 and the first conveying roller 9 is
By the rotation of the first transport roller 9, it is transported toward the inside of the casing 1. At this time, the conductor 4 of the first transport roller 9 causes the paper 4 to move in the same manner as in the previous embodiment.
The position of the binding needle 3 that binds the sheet is detected, and at the same time, the inclination state of the binding needle 3 with respect to the paper width W direction of the binding needle 3, that is, the axial direction of the first transport roller 9 is detected as follows.

Assuming that the binding needle 3 for binding the paper 4 is tilted with respect to the direction of the paper width W, as indicated by the chain line in FIG. 9, it is nipped by the first and second conveying rollers 9, 10. When the rolled paper 4 is conveyed by the rotation of the rollers 9 and 10, the binding needle 3 first moves the front portion 3 in the conveying direction of the paper 4.
A contacts the conductor 22a. At this time, this binding needle 3
22a of the first transport roller 9 through the portion 3A of
Then, the conductor sensor portion 35A of the second transport roller 10 facing this becomes conductive, and the first detection signal thereof is sent to the control portion via the flexible printed board 23 (FIG. 8).

Next, the first and second transport rollers 9 and 10
The binding needle portion 3B on the rear side in the transport direction of the paper 4 comes into contact with another conductor 22b as the paper rotates, and thus the binding needle 3
The conductor 22b is electrically connected to the conductor sensor portion 35B of the second transport roller 10 facing the conductor 22b, and the second detection signal is sent to the control portion via the flexible printed board 23.

As described above, the first detection signal is first sent to the control unit, and then the second detection signal is sent to the control unit. At this time, the time difference between the generation times of both detection signals and its Depending on which conductor 22 or conductor sensor section 35 sent each detection signal, the position of the binding needle 3 and
The tilt state is calculated and detected by the control unit. In this way, not only the position of the binding needle 3 but also how much the binding needle 3 is inclined with respect to the paper width W direction of the paper 4 is detected.

As can be understood from these, in this example,
A large number of conductors 22 provided on the first conveying roller 9 and a large number of conductor sensor parts 35 provided on the second conveying roller 10.
The flexible printed board 23 and the control unit including the CPU constitute a binding needle tilt detection unit that detects a tilted state of the binding needle 3 binding the paper 4 with respect to the paper width W direction.

On the other hand, as shown in FIG. 10, on the feed screw shaft 24 described in the previous embodiment, as in the case of FIG. 5, a support member 28 serving as a rotor of the electromagnetic clutch is provided. Incapable of relative rotation with respect to the feed screw shaft 24,
Moreover, the shaft 24 is slidably fitted in the axial direction, and the supporting member 28 supports the electromagnetic coil portion 29 shown by the chain line in FIG. This electromagnetic coil unit 29 also
As shown in FIG. 9, the rotation of the tongue piece 30 attached to the guide rod 31 is blocked by engaging the guide rod 31 (see FIG. 6). In this way, the support member 28 is rotatable relative to the electromagnetic coil portion 29,
I support you.

As shown in FIGS. 8 and 10, the feed screw shaft 24 is fitted with a bearing member 36 which is rotatable relative to the feed screw shaft 24 and is slidable in the axial direction thereof. 36 is connected to the support member 28 so as to be rotatable relative to the support member 28 and not to be separated from the support member 28 in the axial direction of the feed screw shaft 24. As shown in FIG. 9, a leaf spring 134 is attached to the bearing member 36 and engages with the guide rod 31 in exactly the same manner as the leaf spring 34 shown in FIGS. 2 and 7.
The bearing member 36 serves as an armature for the electromagnetic coil portion 29 and the support member 28 serving as a rotor thereof, and these constitute an electromagnetic clutch.

Further, a support member 37 is fitted on the feed screw shaft 24 so as to be slidable in the axial direction thereof and in a state in which it cannot rotate relative to the shaft 24, and the support member 37 has an electromagnetic coil portion. 38 is supported. This electromagnetic coil portion 38 also has a tongue piece 39 (FIG. 9) protruding from the casing.
, But engages with the guide rod 31 in exactly the same manner as the tongue piece 30 described above, which prevents the electromagnetic coil portion 38 from rotating. The electromagnetic coil portion 38 and the support member 37 are assembled so that they can rotate relative to each other and do not separate in the axial direction of the feed screw shaft 24.

A nut member 127 screw-engaged with the male screw is fitted to the feed screw shaft 24, and the bearing member 36 and the support member 37 described above are connected to the feed screw shaft 24 via the nut member 127. They are connected to each other so as not to separate in the axial direction. The first bevel gear 40 is rotatably fitted to the nut member 127 as shown in FIG. 9, and the rotation center of the first bevel gear 40 coincides with the central axis of the feed screw shaft 24.

Further, the intermediate member 41 is integrally fixed to the above-mentioned bearing member 36, and the wedge-shaped body 16 constituting an example of the needle extracting member is attached to the pin-shaped stud portion 41a of the intermediate member 41. It is pivotally mounted about a central axis 41. This wedge body 16 also has a wedge portion 16a.
The basic shape of the wedge body 16 is the same as that of the wedge body 16 in the previous embodiment. In addition, the wedge body 16 has a structure shown in FIG.
A second bevel gear 42 is integrally provided as shown in FIG. 10, and the second bevel gear 42 meshes with the above-described first bevel gear 40. As is clear from FIG. 10, the rotation center X of the second bevel gear 42 is the center axis of the stud portion 41a of the intermediate member 41, and the rotation center X is orthogonal to the axis of the feed screw shaft 24. There is.

Also here, each element fitted to the feed screw shaft 24, that is, each element shown in FIG. 10 is referred to as a moving unit, and a reference numeral 133 is given to this, and the embodiment shown in FIGS. In the mobile unit 13
3 is different from the moving unit 33 of the embodiment shown in FIGS. 1 to 7 as described above. Moreover, FIGS.
In the embodiment shown in (1), the binding needle inclination detecting means composed of the above-mentioned conductor sensor section 35 and the like is provided, and it differs from the previous embodiment in two points. Other configurations and operations are substantially the same as those of the previous embodiment. Therefore,
A description of the same parts will be omitted.

As described above, when the paper 4 is inserted into the casing 1, the position and the inclination of the binding staple 3 are detected by the staple position detection means and the binding needle inclination detection means. Based on the result, the electromagnetic clutch 25 shown in FIG. 9 is turned on by a command from the CPU, and the feed screw shaft 2
4 starts rotating clockwise in FIG. At this time, the nut member 127 and the first bevel gear 40 supported by the nut member 127 do not rotate, so that the nut member 127 moves the entire moving unit 133 from its home position to the arrow d in FIG.
Move in the direction indicated by. Then, when the wedge body 16 reaches the position facing the binding needle 3 binding the paper 4,
The electromagnetic clutch 25 is turned off, whereby the rotation of the feed screw shaft 24 is stopped and the moving unit 133 is stopped at that position.

As described above, also in this embodiment, the motor, the electromagnetic clutch 25, and the nut member 127 move the needle extracting member, that is, the wedge body 16 to a position facing the binding needle 3 binding the paper 4. The needle extracting member moving means is configured.

During this moving operation, the support member 28 and the support member 37 rotate together with the feed screw shaft 24, but the electromagnetic coil portions 29 and 38 cooperate with the tongue pieces 30 and 39 and the guide rod 31. It does not rotate by action. Further, the wedge body 16 does not rotate until just before the feed screw shaft 24 stops rotating, as in the previous embodiment. The leaf spring 134 (FIG. 9) of the bearing member 36 is fixed to the guide rod 31.
, The rotation of the bearing member 36 is prevented, and the intermediate member 41 integral with the bearing member 36 also does not rotate, and the wedge body 16 connected to the intermediate member 41 via the stud portion 41a thereof. Is prevented from rotating.

At a point slightly before the wedge body 16 faces the binding needle 3, the electromagnetic coil portion 38 is excited, and the magnetic force causes the support member 37 made of a magnetic material to be coupled to the first bevel gear 40. In this way, the support member 37 functions as the rotor of the electromagnetic clutch, and the first bevel gear 4
0 acts as the armature.

When the support member 37 and the first bevel gear 40 are integrally coupled as described above, the feed screw shaft 24 still rotates in the clockwise direction in FIG. 8, and the support member 37 fitted to this also rotates with the shaft 24. They are rotating together. Therefore, the first bevel gear 40 coupled to the support member 37 rotates in the clockwise direction in FIG. 8 around the central axis of the feed screw shaft 24, and the second bevel gear 42 meshing with the first bevel gear 40 forms the wedge body. 16 rotates in the counterclockwise direction in FIG. 9 around the central axis of the stat portion 41a, that is, the rotation center X. Then, the wedge portion 1 in the wedge body 16
When the leading edge of 6a becomes parallel to the binding needle 3 that binds the paper 4, the electromagnetic coil 38 is de-energized and the support member 37 and the first bevel gear 40 are disconnected.
As a result, the first and second bevel gears 40 and 42 stop rotating, and the wedge body 16 stops at that position. That is,
Based on the detection result of the above-described binding needle tilt detection means, the wedge body 16 is tilted by an angle corresponding to the tilted state, and the orientation of the leading edge of the wedge portion 16a and the binding needle 3 are aligned.

Of course, when the binding needle 3 is not tilted with respect to the direction of the paper width W as shown in FIG. 2, the electromagnetic coil portion 38 is not excited and therefore the first and second bevel gears 40 are not excited. , 42 and the wedge body 16 do not rotate.

As described above, in this example, the feed screw shaft 24
A motor for rotating the same, an electromagnetic clutch 25 provided between them, a support member 37, an electromagnetic coil portion 38, first and second bevel gears 40 and 42, an intermediate member 41, and a bearing. The member 36 is a staple extracting member, that is, the wedge body 1 based on the detection result of the binding needle inclination detecting means.
The needle withdrawing member tilting means for tilting 6 is configured.

After tilting the wedge body 16 as described above, immediately before the wedge body 16 reaches the position facing the binding needle 3, that is, immediately before the rotation of the feed screw shaft 24 stops. The electromagnetic coil portion 29 is excited, and the magnetic force couples the support member 28 and the bearing member 36 made of a magnetic material to each other, and the rotation of the support member 28 is transmitted to the bearing member 36, the intermediate member 41, and the wedge body 16. At this time, the leaf spring 134 (FIG. 9) of the bearing member 36 is disengaged from the guide rod 31. In this way, the wedge body 16 rotates around the central axis of the feed screw shaft 24 in the clockwise direction in FIG. 8, the wedge portion 16a thereof is inserted between the binding needle 3 and the paper 4, and the binding needle 3 is inserted into the paper. Extracted from 4. At this time, the wedge body 16 has already tilted, and the leading edge of the wedge portion 16a has the binding needle 3
Since it is in a parallel state with, the binding needle 3 can be reliably pulled out. When the removal of the binding needle 3 is completed, the electromagnetic clutch 25 is turned off, the rotation of the feed screw shaft 24 is stopped, and the wedge body 16 is stopped.

When the wedge body 16 is rotated around the center axis of the feed screw shaft 24 to remove the binding needle 3, the electromagnetic coil portion 38 may be excited to tilt the wedge body 16. In this way, each element of the wedge body 16 can be controlled so that the tilting of the wedge body 16 and the operation of extracting the binding needle 3 by the wedge body 16 are simultaneously performed.

The feed screw shaft 24 is rotated counterclockwise in FIG. 8 to excite the electromagnetic coil portion 29 to excite the support member 28.
By magnetically coupling the bearing member 36 and the bearing member 36, the wedge body 1
6 can be returned to the initial rotation position shown in FIG. 8 together with the intermediate member 41 and the bearing member 36. At this point, the power supply to the electromagnetic coil portion 29 is cut off, the wedge body 16 is stopped, and the leaf spring 134 engages with the guide rod 31 to position the wedge body 16.

Similarly, when the feed screw shaft 24 starts rotating in the counterclockwise direction, the electromagnetic coil portion 38 is excited, whereby the support member 37 and the first bevel gear 40 are magnetically coupled to each other, and the first bevel gear 40 and The second bevel gear 42 is rotationally driven in the opposite direction to that described above, and the wedge 16
Rotates around the center of rotation X and returns to the original intermediate position,
At this point, the power supply to the electromagnetic coil section 38 is stopped.

After that, as in the previous embodiment, the feed screw shaft 24 rotates counterclockwise and the nut portion 12 that does not rotate.
By the cooperative action with 7, the entire moving unit 133 is returned to the home position, at which time the electromagnetic clutch 25
Is turned off and the rotation of the feed screw shaft 24 is stopped.

In the embodiment shown in FIGS. 8 to 9, the motor, the electromagnetic clutch 25, the electromagnetic coil portion 29, and the support member 28.
The bearing member 37 and the intermediate member 41 actuate the wedge body 16 which is an example of a needle extracting member between a position facing the binding needle 3 binding the paper 4 and a position engaging with the binding needle 3. It constitutes a needle withdrawing member operating means.

Note that, in FIG. 10, the respective elements are simplified and schematically shown in order to facilitate understanding of the above-described configuration and operation, but in reality, the respective elements should be easily and surely assembled. Of course, the shape and position of the element is determined so that the individual elements can be subdivided, and the individual element is further divided as necessary.
The same is true for.

In each of the above-described embodiments, a screw shaft having a square cross section is used as the feed screw shaft 24. However, as shown in FIG. 11, a cylindrical feed screw shaft 1 having threads formed on its peripheral surface is used.
24 is used to form a groove 43 in the axial direction, and a projection (not shown) projecting from the support member 28 shown in FIGS. 5 and 10 is slidably fitted into the groove 43. In addition, the supporting member 37 shown in FIG. 10 is also provided with a similar projection, and this is slidably fitted in the groove 43 so that these members 28,
37 may be non-rotatable relative to the feed screw shaft 124 and slidably fitted in the axial direction thereof.

[0069]

According to the stapling needle extracting device of the first aspect, the stapling needle can be accurately and automatically taken out. Moreover, it does not damage the paper.

According to the binding needle extracting device of the second aspect, even when the binding needle is inclined with respect to the paper width direction, it can be accurately and automatically extracted.
It does not damage the paper.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a binding needle extracting device according to an embodiment of the present invention, which corresponds to a view taken along line I-I of FIG. 2 and omits some elements of the device. FIG.

FIG. 2 is a schematic plan view of the binding needle extracting device shown in FIG. 1, in which some elements are omitted and some elements are broken away.

FIG. 3 is a perspective view illustrating an operation when the wedge portion pulls out the binding needle.

FIG. 4 is a perspective view showing an example of a feed screw shaft.

5 is a cross-sectional view taken along the line VV of FIG. 2, showing a part of the elements in simplified form by chain lines.

FIG. 6 is a view as seen in the direction of arrow VI in FIG.

FIG. 7 is a view as seen in the direction of arrow VII in FIG.

8 is a sectional view showing another embodiment similar to FIG. 1, and is a sectional view taken along line VIII-VIII in FIG. 9.

9 is a partial plan view similar to FIG. 2 of the embodiment shown in FIG.

10 is a cross-sectional view taken along the line ZZ of FIG. 8, in which some elements are simplified and shown by chain lines.

FIG. 11 is a perspective view showing another example of the feed screw shaft.

[Explanation of symbols]

 3 Stapling needle 4 Paper 100 Stapling needle removing device W Paper width

Claims (2)

[Claims] 1. A needle position detecting means for detecting the position of a binding needle for binding paper, a needle extracting member for engaging with the binding needle to extract the binding needle from the paper, and detection by the needle position detecting means. Based on the result, the needle extraction member moving means for moving the needle extraction member to a position facing the binding needle binding the paper, and the needle extraction member, the position facing the binding needle binding the paper and its A binding needle extracting device comprising a needle extracting member operating means which is operated between a position where it engages with a binding needle. 2. A binding needle tilt detecting means for detecting a tilted state of a binding needle for binding paper with respect to the paper width direction, and a needle pulling member tilting means for tilting the staple pulling member based on a detection result of the detecting means. The binding needle extracting device according to claim 1, further comprising: