JPH09169006A - Electromotive stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the processing time of a copier without increasing the operation speed of an electromotive stapler. SOLUTION: In an electromotive stapler, a stapler main body having an ejection part ejecting a staple and the table arranged at the position opposed to the ejection part are provided so that either one of them can be relatively reciprocally moved and a first plate detection means 603 detecting that the table or the stapler main body is positioned at a home position is provided and a bound sheet is held between the table and the ejection part when the table or the stapler main body is moved forwardly and the staple is ejected toward the bound sheet from the ejection part. In this case, when the table or the stapler main body is rearwardly moved to come to a position where the holding of the bound sheet is released, a second plate detection means 604 detects this state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric stapler in which either a stapler body having a punching portion or a table arranged at a position facing the punching portion can be relatively reciprocated.

[0002]

2. Description of the Related Art Conventionally, a magazine portion rotatably provided on a base frame, a cartridge mounted on the magazine portion and accommodating sheet staples in a stacked manner, and sheet staples in the cartridge are delivered to an ejection portion. An electric motor equipped with a feeding mechanism, a driver that reciprocates the staples of the fed sheet staples to eject the staples from the ejection unit, and a table provided with a clincher that bends the tips of the ejected staples into flat clinches. The stapler is known.

In such an electric stapler, the table is fixed and the magazine section is operated up and down.
The first detecting means detects that the magazine section is located at the home position.

[0006] At the same time when the splicing sheet is sandwiched between the ejection section and the table by the operation of the magazine section, the staple is ejected from the ejection section by the driver, and the leading end of the staple penetrating the splicing sheet is flatly bent by the clincher to perform the binding. It is done. Then, the first detection means detects that the magazine section has returned to the home position, outputs a home signal, and performs the next spelling operation based on this home signal.

[0005]

However, in such an electric stapler, when the electric stapler is used by being attached to, for example, a copying machine, the copying machine operates until the first detecting means outputs a home signal. Therefore, there is a problem that the processing time of the copying machine becomes long as a result. In order to solve this problem, the operation speed of the electric stapler may be increased, but vibration, shock, noise are increased, and many problems such as durability are affected.

The present invention has been made in view of the above problems, and an object thereof is to provide an electric stapler capable of shortening the processing time of a copying machine or the like without increasing the operating speed of the electric stapler. is there.

[0007]

In order to achieve the above object, the present invention provides one of a stapler body having a punching portion for striking staples and a table arranged at a position facing the punching portion. Is provided so as to be able to reciprocate relatively, and a first detecting means for detecting that the table or the stapler body is located at the home position is provided, and when the table or the stapler body moves forward, An electric stapler that sandwiches a spelling sheet with and ejects staples from the ejecting portion toward the spelling sheet, and when the table or the stapler body is moved back to a position where the sandwiching of the spelling sheet is released. A second detecting means for detecting this is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electric stapler according to the present invention will be described below with reference to the drawings.

1 to 5, reference numeral 1 denotes an electric stapler attached to, for example, a copying machine. The electric stapler 1 includes a stapler body 10 and a stapler body 1.
The cartridge 700 is detachably mounted in the cartridge chamber 25 formed in the cartridge 0.

The stapler main body 10 includes a table 100 that reciprocates, a table mechanism 150 that reciprocates the table 100, and a feeding mechanism (not shown) for feeding the sheet staples S stacked in the cartridge 700 to the ejection unit 720. No.), the ejection mechanism 300 that ejects the staple S from the ejection unit 720, the clincher mechanism (not shown) that bends the tip end of the ejected staple,
Drive mechanism 500 for driving each mechanism 150, 200, 300
And a detection mechanism (not shown) for detecting the position of the table 100. Further, on the front surface of the stapler main body 10, an actuator 2 for detecting whether or not there is a U-shaped staple S1 (see FIG. 15) in the gap 725 of the embossing section 720 is provided. A micro switch (not shown) for detecting the presence or absence of the staple S1 based on the movement of the actuator 2 is provided. This micro switch is attached to the substrate 3.

[Drive Mechanism 500] As shown in FIGS. 6 and 7, the drive mechanism 500 includes a motor M provided on the main body 10, a gear 501 attached to a drive shaft Ma of the motor M, and a gear 501. Intermediate gears 502,5 meshing with
03, a drive gear 504 meshed with the intermediate gear 503,
Cam drive shaft 510 that rotates with this drive gear 504
It is composed of

The cam drive shaft 510 is adapted to rotate clockwise (in FIG. 4) via the gears 501 to 504 by the drive of the motor M (in FIG. 3, it rotates counterclockwise). Movement).

A pair of table cams 511, a pair of feed cams 512, a pair of driver cams 513, and a clincher cam 514 are attached to the cam drive shaft 510.

Both ends of the cam drive shaft 510 are inserted into holes 17 formed in the side plates 12 and 13 of the frame 14 and are rotatably held. The intermediate gears 502 and 503 are rotatably attached to the side plate 13 of the frame 14 (see FIG. 4).

The table 100 is provided on the stapler body 10 so as to be capable of reciprocating. As shown in FIGS. 3 and 4, the table 100 is reciprocated by the table mechanism 150 (moves up and down in FIGS. 3 and 4). ing.

[Table mechanism 150] Table mechanism 15
0 is a link shaft 151 inserted vertically into the long holes 18 of the side plates 12 and 13 of the frame 14, and the link shaft 1
A link member 152 that rotates about 51 as a fulcrum, a table cam 511, and a rotary member attached to the upper surface of the link member 152 (in FIGS. 3 and 4) while being in contact with the peripheral surface of the table cam 511. Roller 15
3 is provided. The link member 152 is biased counterclockwise (in FIG. 3) by a spring (not shown), and the roller 153 is always in contact with the peripheral surface of the table cam 511.

As shown in FIG. 3, the table cam 511 has an increasing portion 511A whose diameter increases as it rotates counterclockwise and a large diameter portion whose diameter becomes maximum and constant. 511B, a decreasing portion 511C whose diameter decreases, and a small diameter portion 511D having a minimum diameter.

The link member 152 includes side plate portions 152A and 152B that fixedly hold both ends of the link shaft 151, and a connecting plate portion 15 that connects the lower ends of the side plate portions 152A and 152B.
2C, the side plate portions 152A, 152B on the lower side of the link shaft 151 form arm portions 152a, 152b extending obliquely forward to the table 100 side, and the arm portions 152a, 152b follow the arm portions. Elongated hole 1
54 are provided. The table 100 is provided in the long hole 154.
The shaft 101 provided in the shaft is rotatably inserted, and the link member 152 rotates clockwise (see FIG. 3) with the link shaft 151 as a fulcrum.
The table 100 is raised in the direction of the arrow by rotating the table 100).

The table 100 has rollers 153.
Is in the home position (initial position) shown in FIGS. 3 and 4 when the roller 153 is in contact with the peripheral surface of the small diameter portion 511D of the table cam 511, and the roller 153 moves the table cam 511.
When the roller 153 comes in contact with the peripheral surface of the large diameter portion 511B, it comes in contact with the lower surface 720A of the embossing portion 720, and the roller 1
When 53 comes into contact with the peripheral surface of the decreasing portion 511C, it descends.

The table 100 has clincher 401,
402 is provided, and the clincher mechanism 401, 402 is rotated by a clincher mechanism (not shown) to clinching the leading end portion of the sheet staple.

[Launching Mechanism 300] Launching Mechanism 300
As shown in FIG. 5, is composed of a driver cam 513 provided on the drive shaft 510 and a launching link 310.

The driver shaft 317 is adapted to reciprocate along the long hole 37 by the rotation about the shaft 314 of the embossing link 310 as a fulcrum.

A forming plate 320 is attached to the driver shaft 317 as shown in FIG. 8, and a driver 321 is attached to the forming plate 320. Then, the forming plate 320 and the driver 321 reciprocate together with the driver shaft 317.

The forming plate 320 descends so as to straddle a projecting portion 714 provided at the front end of the staple guide 712 of the cartridge 700. By the descending of the forming plate 320, the staples sent to the projecting portion 714 are stapled. Is molded in a U shape. The driver 321 is for ejecting staples formed in a U shape. 731 is a pusher, 733 is an inclined surface, and 734 is an abutting surface. Since these have the same functions as conventional ones, their explanations are omitted.

[Detection Mechanism 600] As shown in FIGS. 9 to 12, the detection mechanism 600 is a plate 60 attached to both side surfaces of a clincher cam 514 provided on a drive shaft 510.
1, 602, and plate detection means 603, 604 for detecting the plates 601, 602.
The plates 601 and 602 are formed in an arc shape, and the plate 602 is set longer than the plate 601.

Plate detecting means (first detecting means) 603
Is a light receiving sensor 603 including a light emitting diode 603A and a photodiode arranged at positions sandwiching the plate 601.
The light receiving sensor 603B receives light emitted from the light emitting diode 606A, and the plate 601 blocks the light from the light emitting diode 603A to detect the plate 601. The plate detecting means (second detecting means) 604 is composed of a light emitting diode 604A arranged at positions sandwiching the plate 602 and a light receiving sensor 604B formed of a photodiode, and the light receiving sensor 604B receives light emitted from the light emitting diode 604A, The plate 601 detects the plate 602 by blocking the light from the light emitting diode 604A.

The plate 601 is a light emitting diode 603A when the table 100 is at the home position.
Is set to block the light of the light emitting diode 604A when the table 100 is located between the position where the table 100 descends from the top dead center and completely releases the nipping of the spelling sheet to the home position. Is set to block light.

Reference numeral 610 is the bottom walls 31A, 31 of the magazine 30.
This circuit board is a circuit board mounted above B.
In FIG. 10, light emitting diodes 603A and 604A and light receiving sensors 603B and 604B are arranged. Further, the circuit board 610 is provided with a control circuit (not shown) for driving the motor M upon receiving a spelling signal from a copying machine (not shown). [Operation of Electric Stapler] Next, the operation of the electric stapler 1 configured as described above will be described.

First, the cartridge 700 in which the sheet staples S are stacked is attached to the stapler body 10 in advance. When the motor M is not driven, the table 10
0 is located at the initial position shown in FIG.
Is also in the initial position shown in FIG.
The roller 153 is in contact with the small diameter portion 511D of the roller 11.

When the motor M is driven by the spelling signal from the copying machine, the cam drive shaft 510 rotates counterclockwise (in FIG. 3) via the gears 501 to 504, and together with the cam drive shaft 510. The cams 511 to 514 also rotate.

The roller 1 is rotated by the rotation of the table cam 511.
When 53 starts to come into contact with the peripheral surface of the increasing portion 511A from the peripheral surface of the small diameter portion 511D of the table cam 511, the link member 152 rotates clockwise about the shaft 151 as a fulcrum, as shown in FIG. Then the table 100 rises.

Then, as shown in FIG.
When 3 starts contacting the peripheral surface of the large-diameter portion 511B of the table cam 511, that is, when the cam drive shaft 510 rotates by approximately 90 degrees, the table 100 moves to the lower surface 72 of the hitting portion 720.
It rises to the 0A position (top dead center) and holds the spelling sheet T in between.

While the roller 153 is in contact with the peripheral surface of the large diameter portion 511B of the table cam 511, the table 10
0 continues to stop at the top dead center, and the spelling sheet T remains in the sandwiched state.

While the binding sheet T is being held, the forming plate 320 and the driver 321 are further lowered together with the driver shaft 317, so that the forming plate 320 and the driver 321 are separated from each other by the gap 7 of the ejection portion 720.
25, the forming plate 320 forms the staple S2 into a U-shape as shown in FIG.
The driver 321 ejects the staple S1 formed in a U shape from the ejection port 725B of the ejection unit 720 to the spell sheet T.

When the staple S1 is ejected, the clincher 401 and 402 are clinched by a clincher mechanism (not shown).
Rotates to clinch the front end Sc of the sheet staple S1. After that, the roller 153 contacts the peripheral surface of the reduced portion 511C of the table cam 511, and the table 100 begins to descend.

When the table 100 descends to a predetermined position, that is, when the table 100 completely releases the nipping of the binding sheet T, the sensor plate 602 blocks the light of the light emitting diode 604A. The light receiving sensor 604B detects this light blocking and outputs a light blocking detection signal. By starting the copying operation of the copying machine by this light-shielding detection signal, the processing time of a series of operations from copying to stapling can be shortened.

Further, when the cam drive shaft 510 rotates and the roller 153 contacts the small diameter portion 511D of the table cam 511, the table 100 returns to the home position. At this time, the forming plate 320 and the driver 3
21 also returns to the original position.

When the table 100 returns to the home position, the sensor plate 601 blocks the light of the light emitting diode 603A. The light receiving sensor 603B detects this light shielding and outputs a home signal, and the control circuit determines that the table 100 has returned to the home position by the home signal, and enters a standby state for performing the next spelling operation.

As described above, the copying machine starts the copying operation by the light-shielding detection signal of the light receiving sensor 604B without waiting for the home signal, thereby shortening the waiting time for stopping the paper processing operation and waiting. You can For this reason,
The processing time of a series of operations can be shortened without increasing the operation speed of the electric stapler.

[Other Embodiments] FIG. 16 shows another embodiment of the detection mechanism. In FIG. 16, 630
Is a plate attached to the clincher cam 514,
The plate 630 has a small area of the first shield 630A.
And a second shielding portion 630B having a large area. Reference numeral 631 is a light emitting diode, and 632 is a light receiving sensor that receives light from the light emitting diode 631.

The second light-shielding portion 630B of the plate 630 is set so as to shield the light of the light-emitting diode 631 when the table 100 is located at the home position so that the light-receiving amount of the light-receiving sensor 632 becomes substantially zero. The first light blocking portion 630A of the plate 630 blocks the light of the light emitting diode 631 when the table 100 is located between the home position and the position where the table 100 descends from the top dead center to completely release the nipping of the binding sheets. Light receiving sensor 632.
The amount of received light is set to 1/2. By doing so, one light receiving sensor 632 can detect when the table 100 reaches the position where the binding of the binding sheet is released and when it reaches the home position from the change in the amount of received light. That is, in this embodiment, one detection means detects that the table 100 has reached the release position of the spelling sheet and has reached the home position.

In the above embodiment, the electric stapler of the type in which the table 100 moves up and down and the stapler main body 10 is fixed has been described, but it goes without saying that an electric stapler of the opposite type may be used.

Further, in the above embodiment, the case where the electric stapler 1 is attached to a copying machine for use has been described, but the present invention is not limited to this, and the stapler 1 may be attached to a printing machine, a facsimile or the like for use.

[0044]

As described above, according to the present invention, when the table or the stapler body moves back to the position where the nipping of the spelling sheet is released, the second detecting means is provided for detecting this. Since the copying machine or the like starts the copying operation or the like by the detection signal of the second detecting means without waiting for the home signal, the waiting time for stopping the paper processing operation and waiting is shortened. Therefore, the processing time of a series of operations can be shortened without increasing the operation speed of the electric stapler.

[Brief description of the drawings]

FIG. 1 is a front view showing an external appearance of an electric stapler according to the present invention.

2 is a plan view of the electric stapler shown in FIG. 1. FIG.

FIG. 3 is a right side view of the electric stapler shown in FIG.

4 is a left side view of the electric stapler shown in FIG. 1. FIG.

5 is a cross-sectional view of the electric stapler shown in FIG.

FIG. 6 is a front view showing the frame of the stapler body. It is explanatory drawing which showed the drive mechanism.

FIG. 7 is an explanatory view showing a cam attached to a cam drive shaft.

FIG. 8 is a perspective view for explaining a U-shaped molding using a forming plate.

FIG. 9 is a plan view showing a detection mechanism.

FIG. 10 is a side view showing a detection mechanism.

FIG. 11 is a front view showing a detection mechanism.

FIG. 12 is an enlarged view of FIG.

FIG. 13 is an explanatory diagram showing a state where the table is rising.

FIG. 14 is an explanatory diagram showing a state of table links when the table reaches the top dead center.

FIG. 15 (A) is an explanatory view showing a state where staples are formed in a U shape. FIG. 7B is an explanatory diagram showing a state in which staples have been ejected and have penetrated the binding sheet.

FIG. 16 is an explanatory diagram of another embodiment.

[Explanation of symbols]

 10 stapler main body 100 table 603 first plate detecting means (first detecting means) 604 second plate detecting means (second detecting means) 720 ejecting section S1, S2 staple

Claims (2)

[Claims] 1. A stapler body having a striking portion for striking staples and a table arranged at a position facing the striking portion are provided so as to be relatively reciprocable, and the table or stapler body is provided. Is provided at the home position, and when the table or the stapler main body moves forward, the spelling sheet is sandwiched between the table and the punching section, and the spelling sheet is ejected toward the spelling sheet. An electric stapler for ejecting staples from a section, wherein when the table or the stapler body moves back to a position where the nipping of the spelling sheet is released, a second detecting means is provided. An electric stapler. 2. The electric stapler according to claim 1, wherein the first and second detecting means are constituted by one detecting means.