JP3094881B2 - Electric stapler - Google Patents

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 one of a stapler body having a punching portion and a table arranged at a position facing the punching portion is relatively reciprocally movable.

[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 laminating and storing sheet staples, and a sheet staple in the cartridge are sent out to a punching portion. An electric motor including a feed mechanism, a driver that reciprocates the staples of the fed sheet staples and drives the staples out of the hitting portion, and a table provided with a clincher that bends the tip of the hit staples to flat clinch. Stapler is known.

[0003] In such an electric stapler, a table is fixed, and a magazine part operates up and down.
The first detecting means detects that the magazine is located at the home position.

At the same time that the spell sheet is sandwiched between the punching section and the table by the operation of the magazine section, staples are punched out from the punching section by a driver, and the leading end of the staple penetrating the spell sheet is bent flat by a clincher for spelling. It is completed. 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 the home signal.

[0005]

However, in such an electric stapler, when it is used by attaching it to, for example, a copying machine or the like, the copying machine operates to process a sheet until the first detecting means outputs a home signal. Has to be stopped and waited. As a result, there has been a problem that the processing time of the copying machine becomes longer. In order to solve this problem, the operating speed of the electric stapler may be increased, but many problems such as increase in vibration, impact, noise, and influence on durability occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an electric stapler capable of shortening the processing time of a copying machine or the like without increasing the operation speed of the electric stapler. is there.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides one of a stapler body having a punching section for punching staples and a table arranged at a position facing the punching section. Are provided so as to be relatively reciprocable, and first detecting means for detecting that the table or the stapler main body is located at the home position is provided. An electric stapler that clamps a spell sheet and punches staples from the punching section toward the spell sheet when the table or the stapler body is moved back to a position where the spell sheet is clamped. , A second detection means for detecting this is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric stapler according to the present invention will be described below with reference to the drawings.

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

The stapler body 10 includes a reciprocating table 100, a table mechanism 150 for reciprocating the table 100, and a feeding mechanism (not shown) for feeding the sheet staples S stacked in the cartridge 700 to the ejection section 720. ), A launching mechanism 300 for launching the staple S from the launching section 720, a clincher mechanism (not shown) for bending the tip of the launched 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, the front surface of the stapler body 10 is provided with an actuator 2 for detecting whether or not there is a staple S1 (see FIG. 15) formed in a U-shape in a gap 725 of the embossing portion 720. A microswitch (not shown) for detecting the presence or absence of the staple S1 based on the movement of the actuator 2 is provided. This microswitch is mounted on the substrate 3.

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

The cam drive shaft 510 rotates clockwise (in FIG. 4) via the respective gears 501 to 504 by driving the motor M (in FIG. 3, it rotates counterclockwise). Motion).

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 held rotatably. 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 able to reciprocate. As shown in FIGS. 3 and 4, the table 100 is reciprocated (moves up and down in FIGS. 3 and 4) by a table mechanism 150. ing.

[Table mechanism 150] Table mechanism 15
Reference numeral 0 denotes a link shaft 151 inserted vertically into the long holes 18 of the side plates 12 and 13 of the frame 14 and a link shaft 1
A link member 152 that rotates around the fulcrum 51, a table cam 511, abuts against the peripheral surface of the table cam 511, and is rotatably attached to an upper portion (in FIGS. 3 and 4) of the link member 152. Roller 15
3 is provided. The link member 152 is urged counterclockwise (in FIG. 3) by a spring (not shown) so that the roller 153 always contacts 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 when rotating counterclockwise, and a large-diameter portion whose diameter is maximum and constant. 511B, a decreasing portion 511C in which the diameter decreases, and a small diameter portion 511D in which the diameter is minimized.

The link member 152 is composed of side plates 152A and 152B that fix and hold both ends of a link shaft 151, and a connecting plate 15 that connects the lower ends of the side plates 152A and 152B.
2C, the lower side plate portions 152A, 152B from the link shaft 151 form arms 152a, 152b extending diagonally forward to the table 100 side, and the arm portions 152a, 152b extend along the arm portions. Elongated hole 1
54 are provided. The table 100 is inserted into the long hole 154.
3 is rotatably inserted, and the link member 152 is rotated clockwise about the link shaft 151 (FIG. 3).
The table 100 rises in the direction of the arrow by the rotation of ().

The table 100 has a roller 153
Is in the home position (initial position) shown in FIG. 3 and FIG. 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 is
When the roller 153 comes into contact with the peripheral surface of the large-diameter portion 511B, the roller 153 comes into contact with the peripheral surface of the increased portion 511A, and when the roller 153 comes into contact with the peripheral surface of the large-diameter portion 511B, the roller 153 comes into contact with the lower surface 720A.
53 descends when it comes into contact with the peripheral surface of the decreasing portion 511C.

The table 100 has clinchers 401,
The clinchers 401 and 402 are rotated by a clincher mechanism (not shown) to clinch the leading end of the sheet staple.

[Launching Mechanism 300] Launching Mechanism 300
Is composed of a driver cam 513 provided on a drive shaft 510 and a launch link 310, as shown in FIG.

The driver shaft 317 reciprocates along the long hole 37 by the rotation of the driving link 310 about the shaft 314 as a fulcrum.

As shown in FIG. 8, a forming plate 320 is mounted on the driver shaft 317, and a driver 321 is mounted on the forming plate 320. Then, the forming plate 320 and the driver 321 reciprocate together with the driver shaft 317.

The forming plate 320 is lowered so as to straddle a protrusion 714 provided at the front end of the staple guide 712 of the cartridge 700. The staple sent to the protrusion 714 by the lowering of the forming plate 320 is formed. Is formed on a U-shape. The driver 321 drives out staples formed in a U-shape. In addition, 731 is a pusher, 733 is an inclined surface, and 734 is a contact surface. Since these have the same functions as the conventional ones, their description is omitted.

[Detection Mechanism 600] As shown in FIGS. 9 to 12, the detection mechanism 600 includes a plate 60 mounted on both sides of a clincher cam 514 provided on a drive shaft 510.
1, 602 and plate detecting 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 to be 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 a position sandwiching the plate 601.
B, the light emitted from the light emitting diode 606A is received by the light receiving sensor 603B, and the plate 601 detects the plate 601 by blocking the light from the light emitting diode 603A. The plate detecting means (second detecting means) 604 is composed of a light emitting diode 604A disposed at a position sandwiching the plate 602 and a light receiving sensor 604B composed of a photodiode. The light receiving sensor 604B receives light emitted from the light emitting diode 604A, The plate 601 detects the plate 602 by blocking light from the light emitting diode 604A.

The plate 601 is provided with the light emitting diode 603A when the table 100 is at the home position.
When the table 100 is positioned between the position where the table 100 is lowered from the top dead center and the spell sheet is completely released and the home position, the light of the light emitting diode 604A is set. Are set to shield light.

610 is the bottom wall 31A, 31 of the magazine 30
B is a circuit board mounted above B.
10, light emitting diodes 603A and 604A and light receiving sensors 603B and 604B are provided. The circuit board 610 is provided with a control circuit (not shown) for driving the motor M in response to 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 on which the sheet staples S are stacked is mounted on 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 located at the initial position shown in FIG.
The roller 153 is in contact with the small-diameter portion 511 </ b> D of No. 11.

When the motor M is driven by a 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. Each of the cams 511 to 514 also rotates.

The rotation of the table cam 511 causes the roller 1 to rotate.
When the 53 starts to contact 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 goes up.

Then, as shown in FIG.
3 starts to abut on the peripheral surface of the large-diameter portion 511B of the table cam 511, that is, when the cam drive shaft 510 is rotated by approximately 90 degrees, the table 100 is moved to the lower surface 72 of the ejection portion 720.
It rises to the 0A position (top dead center) and clamps the spell sheet T.

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 spell sheet T remains held.

While the spell sheet T is being held, the forming plate 320 and the driver 321 are further lowered together with the driver shaft 317, and the forming plate 320 and the driver 321 are separated from the gap 7 of the embossed portion 720.
25, the forming plate 320 forms the staple S2 into a U-shape as shown in FIG.
The driver 321 launches the staple S1 formed in a U-shape from the ejection port 725B of the ejection section 720 onto the spell sheet T.

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

When the table 100 is lowered to a predetermined position, that is, when the table 100 completely releases the spell 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 based on the light-shielding detection signal, the processing time of a series of operations from copying to spelling is reduced.

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 light from the light emitting diode 603A. The light receiving sensor 603B detects this light shielding and outputs a home signal. Based on the home signal, the control circuit determines that the table 100 has returned to the home position, and enters a standby state for performing the next spelling operation.

As described above, the copying machine starts the copying operation in response to the light blocking 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. Can be. For this reason,
The processing time for a series of operations can be reduced 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 first shielding portion 630A.
And a second shielding portion 630B having a large area. 631 is a light emitting diode, and 632 is a light receiving sensor for receiving light from the light emitting diode 631.

The second light-blocking portion 630B of the plate 630 blocks light from the light-emitting diode 631 when the table 100 is at the home position, and is set so that the amount of light received by the light-receiving sensor 632 becomes substantially zero. The first light-shielding portion 630A of the plate 630 shields the light of the light-emitting diode 631 when the table 100 is located between the position where it descends from the top dead center and completely releases the nipping of the spell sheet and the home position. And the light receiving sensor 632
Is set so that the amount of received light is １. In this manner, one light receiving sensor 632 can detect when the table 100 comes to the position where the spell sheet is nipped and when it comes to the home position from the change in the amount of received light. That is, in this embodiment, the detection of the table 100 at the spell sheet release position and the home position is detected by one detecting unit.

In the above embodiment, the electric stapler of the type in which the table 100 moves up and down and the stapler body 10 is fixed has been described, but it is needless to say that the electric stapler of the opposite type may be used.

In the above embodiment, the case where the electric stapler 1 is used by attaching it to a copying machine has been described. However, the present invention is not limited to this, and the electric stapler 1 can be used by attaching it to, for example, a printing machine or a facsimile.

[0044]

As described above, according to the present invention, when the table or the stapler body is moved back to the position where the spell sheet is nipped, the second detecting means is provided. Therefore, the copying machine or the like should start the copying operation or the like in response to the detection signal of the second detection means without waiting for the home signal, thereby shortening the waiting time for stopping the paper processing operation and waiting. Therefore, the processing time of a series of operations can be reduced without increasing the operation speed of the electric stapler.

[Brief description of the drawings]

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

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

FIG. 3 is a right side view of the electric stapler shown in FIG. 1;

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

FIG. 5 is a sectional view of the electric stapler shown in FIG. 1;

FIG. 6 is a front view showing a frame of the stapler body. FIG. 3 is an explanatory diagram showing a driving 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 by 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. 10;

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

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

FIG. 15A is an explanatory view showing a state in which staples are formed in a U-shape. (B) It is explanatory drawing which showed the state in which the staple was driven out and penetrated the spell sheet.

FIG. 16 is an explanatory diagram of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Stapler main body 100 Table 603 1st plate detection means (1st detection means) 604 2nd plate detection means (2nd detection means) 720 Ejection part S1, S2 Staple

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-54-127729 (JP, A) JP-A-4-47989 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B27F 7/17 B25C 5/02

Claims (2)

(57) [Claims] 1. A table or stapler body provided with one of a stapler body having an ejection portion for ejecting staples and a table arranged at a position facing the ejection portion so as to be relatively reciprocally movable. Is provided at a home position, and when the table or the stapler body moves forward, the spell sheet is sandwiched between the table and the punching section, and the punching is performed toward the spell sheet. An electric stapler for ejecting staples from a section, wherein a second detecting means for detecting when the table or the stapler body is moved back to a position where the spelling sheet is released is provided. Electric stapler. 2. An electric stapler according to claim 1, wherein said first and second detecting means are constituted by one detecting means.