JP3355514B2 - Staplers and staple cartridges - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staple cartridge removably mounted with a staple cartridge containing a staple band in which a number of linear staples (unformed short wire members) are connected in a band shape, and a staple cartridge thereof. Things.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 16, an electric stapler is composed of a staple strip 401 in which a plurality of linear staples (unformed short wires) 400 are connected in a strip shape.
02, and the staple cartridge 402 is detachably mounted on the stapler main body.
The leading end of the staple strip 401 extending from the staple strip 401 is fed into the holding groove 409a of the molding block 409 by a feeding operation (arrow 404) by a feeding mechanism, and the leading staple 401a held in the holding groove 409a.
Is first formed into a U-shape by a former 410 by a driving operation (arrow 406) by a driver 405 constituting an insertion means, and further, the driver 405 drives the sheet into a sheet.

[0003] As shown in FIG. 17, the trailing end of the staple strip 401 is detected by a needle detecting sensor 501 arranged at a predetermined distance from the leading staple 401 a, and the remaining amount of staples in the cartridge 402 is detected. When it was found that had decreased to a certain limit, a new cartridge was replaced and the used cartridge was discarded.

[0006] However, the needle detection sensor 501 is connected to the needle tip 40.
1a, the needle detection sensor 501 detects the last end of the staple strip 401 and replaces it with a new cartridge when the needle has run out. Needles are wasted. Therefore, usually, the needle detection sensor 50
Even after the detection of 1, a certain number of times can be used.

However, the cartridge 402 is provided with a retainer spring 403 (FIG. 17) as a reverse-prevention means in the cartridge 402 in order to move the staple strip 401 in one direction of the feed direction (arrow 404). ing. Therefore, when the last end of the staple band 401 passes through the retainer spring 403, when the cartridge is replaced with a new one after that, the staple band 401 remaining in the old cartridge remains on the stapler body as it is. become. If a new cartridge is inserted into the stapler main body in this state, the remaining needles are disturbed in a band-like arrangement inside the stapler, causing poor needle driving and staple jam.

Therefore, usually, as shown in FIG. 17, a stopper portion 401 'is formed at the rearmost end of the staple strip 401 by bending, and a retainer spring 403 is formed.
A stopper engagement portion 403 'is provided on a part of the stopper portion 401' by a protrusion which can be hooked on the stopper portion 401 '. When the needle detection sensor 501 detects the absence of the needle, the operation is continued, and when the remaining amount of the needle reaches a predetermined amount. The rearmost stopper portion 401 'of the needle is caught by the projection 403' of the retainer spring 403, so that the needle cannot be mechanically fed and the needle does not come out (see Japanese Patent Publication No. Hei 6-9792). .

[0007]

As described above, conventionally, when the remaining amount of the needle in the cartridge has reached a predetermined amount, the cartridge is replaced with a new cartridge, and the used cartridge is discarded.

However, since the cartridge case is made of synthetic resin, it is difficult to dispose of the cartridge case, and discarding the cartridge wastes resources. On the other hand, it is troublesome to collect the cartridge case from the user side and replenish or recycle the staples, which increases the product cost.

Therefore, it is desired that staples can be refilled, but there are the following problems.

(1) Since the cartridge is provided with the retainer spring 403 for preventing back-up, the staple band 401 cannot be sent from the outlet to the inside in the reverse direction, so that a new staple band can be inserted. Can not.

(2) Since a stopper 401 'is provided at the rear end of the staple strip 401 so as not to leave the remaining staple strip in the stapler, the staple strip remaining in the cartridge case is provided. 401 cannot be removed from the exit.

Therefore, refilling can be performed only by disassembling the cartridge case and performing reassembly.

[0013] Therefore, an object of the present invention is to solve the above-mentioned problems, and to staple a cartridge case without disassembling it even if a retainer spring is provided or a stopper portion is provided at a rear end of a staple band material. An object of the present invention is to provide a stapler capable of refilling a band material and a staple cartridge thereof.

[0014]

Means for Solving the Problems To achieve the above object, the present invention is as follows.

According to the first aspect of the present invention, there is provided a detachable cartridge containing a staple band in which a number of linear staples are connected in a band, and the remaining amount of staples in the cartridge has reached a predetermined amount. Detection means, an insertion means for sequentially inserting the staples in the cartridge into the binding sheet from the leading end, a feeding means for sending out the staple band material in the cartridge to the insertion means, and an insertion means for inserting the staple band material in the binding sheet. A stapler provided with a bending means for bending the tip of the staple, wherein the staple cartridge is provided at a rear end of the staple band, and a case accommodating the staple band movably to an insertion position by the insertion means. A stopper portion provided on the case and the detecting means detects a remaining amount of staples. Provided the position from the distal end side of the case that, a stopper engaging portion for preventing movement of the staple strip engaged with the stopper portion, provided in said casing,
Located between the tip of the case and the stopper engaging portion,
Reversal prevention means for preventing reversion of the staple strip,
An opening / closing cover provided on the case and capable of opening and closing the rear side from an arbitrary position between the tip of the case and the stopper engaging portion so that the staple strip can be replaced. .

According to the first aspect of the present invention, even if the cartridge is detached from the stapler at any point after the stapling operation is performed several times after the trailing end of the staple band is detected, the sheet of the staple band can be used. Since the rear end portion engages with the stopper engaging portion, the staple band does not remain in the stapler and is taken out together with the cartridge. And
By opening the opening / closing cover of the cartridge case, the engagement with the staple band at the retainer spring portion and the seat rear end stopper engaging portion is released and becomes free, so take out the remaining staple band and remove the new staple band. Can be loaded. Therefore, the staple band can be refilled and reused without discarding the cartridge having no staple band.

According to a second aspect of the present invention, in place of the open / close cover of the cartridge, an open / close cover is provided which can be freely opened and closed from the front end of the case so that the staple band can be replaced. According to the second aspect of the invention, since the retainer spring portion and the sheet rear end stopper engaging portion are opened from the front end of the cartridge case, the remaining staple band can be taken out, and a new staple band can be loaded. .

According to a third aspect of the present invention, in place of the open / close cover, an openable / closable cover can be opened and closed from the front end of the case to the reverse prevention means so that the staple band can be replaced. According to the third aspect of the present invention, since the retainer spring portion and the sheet rear end stopper engaging portion are opened, the staple strip can be similarly loaded.

According to a fourth aspect of the present invention, instead of the above-mentioned opening / closing cover, an opening / closing cover that can be freely opened / closed from the back between the reverse-return preventing means and the stopper engaging portion so that the staple band can be replaced. is there. According to the fourth aspect of the present invention, the staple band is held down by the reverse prevention means. However, since the sheet rear end stopper is opened, the rear end of the remaining staple band is cut off, and the sheet is pulled out in the feed direction. Upon removal, a new staple band can be loaded.

In the stapler according to the first, second, third or fourth aspect, the opening / closing cover may be configured to be opened / closed about a rear side of the case of the mating case as a shaft (claim 5). (Claim 6), a configuration that opens and closes around an axis located on one side in the width direction of the counterpart case (Claim 7), and a configuration that slides in the width direction of the counterpart case. (Claim 8).

Preferably, the opening / closing cover is provided with a lock mechanism which is locked to the counterpart case.

As a specific configuration, it is preferable that the case is formed of a light-transmitting synthetic resin, and the reverse-return preventing means is formed of a metal spring.
0). The insertion means may include a driver, a drive arm connected to the left and right sides of the driver, and a motor disposed on the bending means side to drive the drive arm to move the driver up and down. Good (claim 11).
Further, the insertion means and the bending means are rotatably connected about a shaft, and this shaft also serves as a drive transmission shaft to the left and right drive arms and a rotation shaft of a lever for fixing the mounted cartridge. By the form (claim 1
2) A simple and compact configuration can be obtained. Also,
The bending means may be provided with a stopper member for preventing jam staples from entering the inside (claim 13).

Claims 14 to 25 are inventions of the staple cartridge itself.

According to a fourteenth aspect of the present invention, a staple strip which is detachably attached to a stapler and in which a plurality of linear staples are connected is accommodated in a case, and staples are inserted one by one into a binding sheet by driving the stapler. In the staple cartridge, a staple provided at a rear end of the staple band and a staple provided on the case and engaged with the stopper when the remaining amount of the staple band reaches a predetermined amount. A stopper engaging portion for preventing movement of the band material, a reverse-return preventing means provided on the case and positioned between a tip of the case and the stopper engaging portion for preventing the staple band material from returning, and the case; , So that the rear side can be freely opened and closed from any position between the tip of the case and the stopper engaging portion so that the staple strip can be replaced. It is obtained and a bar.

According to the fourteenth aspect of the present invention, even if the cartridge is removed from the stapler at any time after the stapling operation is performed several times after the trailing end of the staple band is detected, the sheet of the staple band can be used. Since the rear end portion engages with the stopper engaging portion, the staple band does not remain in the stapler and is taken out together with the cartridge. Then, by opening the opening / closing cover of the cartridge case, the engagement with the staple band material in the retainer spring portion and the seat rear end stopper engagement portion is released and becomes free.
The remaining staple strip can be removed and a new staple strip loaded. Therefore, the staple band can be refilled and reused without discarding the cartridge having no staple band.

According to a fifteenth aspect of the present invention, in place of the above-mentioned opening and closing cover, an opening and closing cover that can be opened and closed from the front end of the case so that the staple strip can be replaced.
According to the fifteenth aspect of the present invention, the retainer spring portion and the sheet rear end stopper engaging portion can be opened from the leading end of the cartridge case, so that the remaining staple band can be taken out and a new staple band can be loaded. it can.

According to a sixteenth aspect of the present invention, instead of the open / close cover, an openable / closable cover can be opened / closed from the front end of the case to the reverse prevention means so that the staple band can be replaced. According to the sixteenth aspect of the present invention, since the retainer spring portion and the seat rear end stopper engaging portion are opened, the staple strip can be similarly loaded.

According to a seventeenth aspect of the present invention, instead of the open / close cover, an openable / closable cover is provided on the rear side between the reverse prevention means and the stopper engaging portion so that the staple band can be replaced. is there. According to the seventeenth aspect of the present invention, the staple band is held down by the reversion preventing means. However, since the sheet rear end stopper is opened, the rear end of the remaining staple band is cut off, and the staple sheet is moved in the feed direction. By pulling out and removing, a new staple strip can be loaded.

The invention according to claim 18 is a cartridge containing a staple band which is detachably attached to a stapler and in which a plurality of linear staples are connected, comprising a circular storage section containing the staple band, A staple provided with an extending portion extending from the storage portion so as to extend a tip end portion of the staple band material in a tangential direction, and a retainer spring for preventing the staple band material from returning in the middle of the extending portion. In the cartridge, an arbitrary position between the end of the case and the stopper engagement portion at the bottom of the extension portion is formed as a cut so that the staple band material can be replaced, and a rear side thereof is configured as an openable and closable cover. It was done. According to the eighteenth aspect of the present invention, the stopper does not necessarily have the stopper portion and the stopper engaging portion. However, since the reverse prevention means is opened by opening the opening / closing cover, a new staple band material can be loaded similarly.

The above-mentioned claim 14, 15, 16, 17 or 1
8. The staple cartridge according to claim 8, wherein the opening / closing cover is configured to be opened / closed about a case rear side of a counterpart case as an axis (claim 19), or is configured to slide in the front-rear direction of the counterpart case to open / close (claim 19). Item 20), a form that opens and closes around an axis located on one side in the width direction of the counterpart case (Claim 21), and a form that slides in the width direction of the counterpart case to open and close (Claim 22) ,be able to. It is preferable that the opening / closing cover is provided with a lock mechanism which is locked to the counterpart case.

This lock mechanism has a lock arm having a wedge-shaped cross-section at the end of one of the open / close covers and a case body formed at the other end of the case body, at the contact portion between the open / close cover and the mating case that are in contact with each other. It is preferable that the lock arm comprises a complementary lock receiver which engages with the lock arm, and the lock arm is formed so as to be elastically deformable in the width direction of the case. The case can be elastically deformed in the width direction of the staples.When staples are in the case, the elastic deformation of the case is regulated by the staples.When the staples run out, the case becomes deformable, the lock is released, and the open / close cover is opened. Become open. For this reason, it is possible to prevent the cover from being opened carelessly before the staples run out.

Preferably, the case is formed of a light-transmitting synthetic resin, and the return preventing means is formed of a metal spring.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings.

FIG. 1 shows a staple cartridge 200,
FIG. 2 shows a staple strip 300 loaded in the cartridge.

This staple strip 300 is the same as a conventionally known staple strip. As shown in FIG. 2, a large number of linear staples (unformed short wires) 301 are attached to the adhesive tape 30 at the center.
2 to form a continuous belt-like shape. At the rearmost end of the staple strip 300, a stopper 303 is formed by bending.

The staple cartridge 200 stores the staple strip 300, pulls out the stored staple strip 300, and moves the tip of the staple strip 300 to a driving position by a driver (insertion means), that is, a position of a holding groove of a molding block. It consists of a transmissive case made of synthetic resin that is movably accommodated, and the case is configured to be openable and closable so that the staple strip 300 can be refilled.

More specifically, the staple cartridge 20
0 is a circular storage section 201 for storing the portion 304 around which the staple strip 300 is wound, and the leading end 305 of the staple strip 300 is drawn out of the storage section 201.
An extension portion 202 extending tangentially from the storage portion 201 of the cartridge.

The extending portion 202 of the cartridge comprises a bottom plate portion 203 and outlet side wall portions 204 erected on both sides thereof.
And a guide ridge 205 provided on the inner side surface of the lead-out side wall portion 204, and the bottom plate portion 203, the side wall portion 204,
And the guide ridge 205, the staple strip 300
Is formed.

In the middle of the extending portion 202, as shown in FIG. 9, a projection 207 serving as a fulcrum on the open end side of the feed spring 91 is provided so as to bridge the side wall portion 204, and a staple strip 300 is provided. The base of a metal leaf spring-like retainer spring (return preventing means) 208 for holding the staple is fixedly provided, and the tip of the retainer spring 208 presses and holds the staple strip 300 with an appropriate pressing force. Further, in the middle of the extension portion 202,
A stopper engaging part 209 is provided on the storage part side of the retainer spring 208 on the storage part side with respect to the tip end working position, so as to engage with the rearmost stopper part 303 of the staple strip 300 to prevent the staple strip from moving. As shown in FIG. 9, the stopper engaging portion 209 is located on the downstream side in the feeding direction of the staple strip 300 from the needle detection sensor (reflection type photodetector) 14 for detecting the rear end of the staple.

The cartridge 200 can be opened and closed so that the staple band can be replaced.
The cartridge case 210 is divided into two parts, a case body (partner case) A and an opening / closing cover B, from an arbitrary position between the case tip (that is, the extension part tip 202 a) and the stopper engaging part 209. The two portions A and B are openable and closable about a pivot 211 provided near the top of the storage portion 201.

In this example, the housing 201 is a case body A.
Side is separated from the center so as to have a larger accommodating space than the opening / closing cover B side.
Reference numeral 02 denotes an outgoing road side wall portion 204, a guide ridge 205, a protrusion 207, and a retainer spring 208 on the case body A side.
Are separated so as to accompany them. Specifically, the extension portion 202 is separated so that the opening / closing cover B side has part or all of the bottom plate portion 203. In the embodiment shown in FIG. 1, the front portion 203a of the bottom plate portion 203 is
And a rear part 203b is formed on the opening / closing cover B side. The cut between the two portions 203a and 203b is on the front side of the retainer spring 208.

Further, as shown in FIGS. 1, 3 and 4,
A lock arm 212 having a wedge-shaped cross section as shown in FIG. 4 is formed on one of the open / close covers B as a lock mechanism at a contact portion between the case body A and the open / close cover B near the center of the storage unit 201. On the other side of the case body A, a lock receiver 213 having a complementary shape to be engaged therewith is formed. The case 210 is elastically deformable in the width direction of the staple strip 300, and receives the lock arm 212 from the lock receiver 21.
3 along the inner surface of the case body A
Is slightly bent outward, the opening / closing cover B is engaged with the lock receiver 213, and the opening / closing cover B is closed. As described above, since the cover lock arm 212 has a wedge-shaped shape (FIG. 4),
When closing the opening / closing cover B, it enters in the closing direction along the inner side surface of the lock receiver 213,
If the number of remaining sheets of 0 is large, it is difficult to open the opening / closing cover A by bending the lock arms 212 inward each other, thereby preventing the cartridge from being erroneously opened when the cartridge is mounted on the stapler body.

The staple cartridge 200 is mounted on the stapler body.

In FIG. 5 to FIG. 10, the stapler 1 is
A frame 2, a head unit 3, and an insertion means 4 for sequentially inserting the staples in the cartridge into the binding sheet from the front end
And a bending means (clinch portion) 5 for bending the leading end of the staple inserted into the binding sheet by the inserting means, and a feeding means 6 for feeding the staple band material in the cartridge to the insertion position by the inserting means.

The frame 2 of the stapler 1 has a hollow base portion 20 and an anvil 2 serving as a bending means provided at an upper end of the hollow base portion 20.
1 and a side wall 22 raised from both sides of the base portion 20. A body 30 which is a main body of the head unit 3 is disposed between the side walls 22 and is swingable up and down by a hinge shaft 31 at the rear thereof. Supported. That is, the insertion means 4 and the bending means 5 are rotatably connected about the shaft 31.

On the front of the body 30, a front shell 4 is provided.
0 is provided, a former 70 as a U-shaped bending member is located between the two, and a forming block (pending block) 60 is provided through the front outer shell 40 and pressed by the spring 50. ing. These bodies 3
The head unit 3 includes the front shell part 40, the former 70, the molding block 60, and the spring 50.

The body 30 has a receiving base portion 32 for receiving the extension portion 202 of the cartridge 200, a front upright portion 34, a top portion 35 extending from the front upright portion toward the receiving base 32, and an upright portion on the top portion 35. Guide pillar 36 is provided. The guide column 36 has an upper head portion 8 of a driver 80 which is a driving tool disposed above the body 30.
1 is fitted so as to be vertically movable. The driver 80 includes an upper head portion 81, a push claw 84, and a driving blade 86. The upper head portion 81 is connected to the drive arms 55 on both sides.
And is swung about the hinge shaft 31 as a fulcrum.

The drive arm 55 is driven to drive the driver 8.
As a drive source for raising and lowering 0, a rear portion of the base portion 20 on the side where the anvil 21 as the bending means exists,
One-cycle drive motor 5 that can rotate in both forward and reverse directions
1 is provided.

The above-described drive motor 51 and drive arm 55
The driver 80 constitutes the insertion means 4 for sequentially inserting the staples 301 in the cartridge 200 from the leading end into the binding sheet.

A pinion is fixed to the output shaft of the motor 51, and large gears 54 are rotatably mounted on both side walls 22 at symmetrical positions on the outer surface side. The rotational force of the motor 51 is transmitted through gears 52 and 53. And transmitted to the large gear 54. The shaft of the gear 53 is common to the hinge shaft 31 of the body 30 described above, and as a result, the hinge shaft 31 also serves as a drive transmission shaft to the left and right drive arms 55. The hinge shaft 31 also serves as a rotation shaft of the cartridge lock lever 101. Therefore, a simple and small configuration of the stapler is realized.

Further, the large gear 54 is provided on both side walls 22.
Arm 55 driven by the arm shaft 5
6 so as to be freely rotatable. The left and right drive arms 55 have a slit 55b in which the shaft 81a of the upper head portion 81 of the driver 80 is fitted, and the arm 55 on one side around the arm shaft 56. The other arm portion has an opening 55a having a cam surface 57. A driving roller 58 projecting from the surface of the large gear 54 is engaged with the cam surface 57 in the opening 55a. Accordingly, when the large gear 54 rotates, the opposite end (slit 55b side) swings up and down about the arm shaft 56 of the drive arm 55 by the action of the cam surface 57 and the drive roller 58, whereby the driver 80 moves up and down so as to push or pull up the driving blade 86. The arm shaft 56 penetrates a vertically long hole provided in the side wall 22 so as to be able to move slightly up and down.
6 and a coil spring 59 hung between the ear 22a of the side wall 22
And is usually in the lowest position.

Further, in order to constitute the feeding means 6, a feed member (feeder) 90 having a feed spring 91 as an elastic portion and a feed claw 92 at a lower portion is provided adjacent to the front upright portion 34 of the body 30. The feed member 90
Can move about a shaft 93 serving as a fulcrum. Further, at a position facing the opening 100 of the front upright portion 34, a molding block 60 having a holding groove 64 for holding the staple 301 is arranged so as to be able to move left and right in FIG. Block 60 is urged by spring 50 toward front upright portion 34.

Further, adjacent to the feed member 90, a cartridge 200 accommodating a staple strip 300 formed by connecting a number of linear staples 301 in a strip shape is detachably disposed. As described above, the feed spring 91 is provided in the cartridge 200 in the middle of the extension portion 202.
A projection 207 serving as a fulcrum on the open end side is formed, and a metal retainer spring 208 for holding down the staple strip 300 is fixedly provided, and holds the staple strip 300 with an appropriate pressing force. .

A U-shaped bending former 70 is arranged adjacent to the driving blade 86.
When the driver 80 moves downward, the driver 8
When the driving blade 86 is pushed down by a predetermined amount by being pushed by the pushing claw 84 of the driving blade 86, and the driving blade 86 moves upward, the driving blade 8
The former 70 is inserted into a long hole 82 of a predetermined length provided in
Are engaged with each other and are raised upward. The pressing claw 84 is detached from the former 70 when the former 70 is pressed by a predetermined amount.

The protrusion 75 provided on the former 70
Works as a pressing means for swinging and displacing the feed member 90, and presses the cam surface portion 94 of the feed member 90 when the former 70 is pressed down. This allows
The feed member 90 rotates counterclockwise in FIG. 9 with respect to the rotation support shaft 93 while distorting the feed spring 91, and moves the feed claw 92 to the retracted position in the direction opposite to the needle feed direction.
When 0 is lifted and the pressing is released, the feed member 90 constituting the feeding means 6 returns to the advanced position by the action of the feed spring 91 serving as an elastic portion. A predetermined stroke amount is sent.

Then, the drive motor 51 of one cycle operation is operated.
When the large gears 54 on both sides rotate in phase with each other, the driving roller 58 shown in FIG.
, The drive arms 55 on both sides rotate about the arm shaft 56, and the distal end side of the drive arm 55 (the slit 55
b) moves downward so as to press the head portion 81 of the driver 80. The driving blade 86 is pushed to move downward, and the body 30 is further pushed by the driver 80 to move toward the anvil 21 with the hinge shaft 31 as a fulcrum.
0 and the anvil 21 sandwich the sheet at the binding position where the sheet is bound.

As shown in FIGS. 8 and 10, anvil 2
A prismatic stopper member 23 is provided laterally on the upper surface of the upper surface area 1 of the upper surface area on the back side for holding the sheet.
3 and can be prevented from entering the inside of the stapler (right side in FIG. 10).

(1) Normal One-Cycle Operation Here, a normal one-cycle operation will be described. For convenience of explanation, the staple strip 300 stored in the cartridge 200 is sent from the opening 100 of the front upright portion 34 to the molding block 60 by the feed claw 92 of the feed member 90, and the leading end needle is moved to the center portion. Is held in the holding groove 64 of the molding block 60.

5 to 10, the rotational torque of the drive motor 51 is reduced by the gears 52 and 53 and transmitted to the large gear 54. When the large gear 54 rotates by a predetermined angle corresponding to the home position, the driver 80 starts pushing down the driver 80, and the body 30 starts moving away from the home position and descending. When the body 30 descends and comes into contact with the sheet on the base portion 20, the driving blade 86 is relatively pressed down against the body 30,
The former 70 pressed by the push claws 84 is used as the molding block 6.
Both ends of the linear staple 301 held at 0 are pushed and bent in a U-shape. Further, the driving blade 86 is pushed down, the pushing claw 84 is disengaged from the former 70, and only the driving blade 86 is pushed down to reach the tapered portion of the molding block 60, and the U-shaped while pushing back the molding block 60. Only the most advanced staple bent to the front is sheared with the front upright portion 34, and the needle is driven into the sheet (the driving of the driver is completed). The clinch position starts from this point.

While the drive arm 55 and the body 30 remain at the clinch position, in the case of a normal eyeglass clinch, the needle point penetrating the sheet is bent inward by the anvil 21. This embodiment is a case of a flat clinch, and a clinch lever 24 oscillatingly hung on a base portion 20 is pushed up by a support jaw 25 extended so as to be located further below the base portion 20. Anvil 2
1, the both ends of the staple are crushed into a flat plate shape, and the sheet is stapled. The supporting jaw 25 is provided at the other end of the lever 26 having one end engaged with a cam surface (not shown) formed on the large gear 54, and is attached to the leaf spring 28 about the shaft 27 by the large gear 54. It is made to swing in opposition.

Next, the body 30 moves upward (end of the clinch position), the driver 80 is pulled up, the driving blade 86 moves upward, and returns to the standby position. Further, the drive arm 55 and the body 30 move to the standby positions (home positions) shown in FIG. 5, respectively, and one stroke of the sheet binding stop is completed. The large gear 5
One rotation is completed by one rotation of No. 4.

When the driving blade 86 returns, that is, when the protrusion 75 of the U-shaped bending former 70 returns, the feed member 90 with respect to the rotary shaft 93 is moved by the return force of the feed spring 91 as shown in FIG. Of the feed member 90
Is moved from the retracted position to the advanced position, whereby the next linear staple 301 is fed into the holding groove 64 of the forming block to prepare for binding of the next sheet.

(2) Cartridge Replacement by Detecting Needle Absence As shown in FIG. 9, the needle detection sensor 14 is constituted by a reflection type sensor composed of a light emitting and receiving element pair provided on the bottom 32a of the receiving base 32 in the body 30. ing. The staple detection sensor 14 detects the staple 3 of the staple band 300 in the cartridge 200 through the transparent case 210.
By detecting the presence or absence of light reflected from 01,
The presence or absence of the staple 301 is constantly monitored, and when the staple is exhausted, a staplerless detection signal is output. However, since the needle detection sensor 14 is provided at a position away from the molding block 60, the needle detection sensor 14 accurately detects the near end of the staple strip 300.

When the remaining amount of the needles in the cartridge 200 decreases to a certain limit, the rear end of the staple strip 300 is detected by the needle detection sensor 14 disposed at a certain distance from the tip 202a. The empty cartridge 200 is taken out, and a new staple band 300 is loaded therein.

It should be noted that the needle detection sensor 14 is
02a is located at a certain distance from the
After the needle detection sensor 14 detects the absence of the needle (rear end detection), the driving operation is continued until the stopper 303 formed by bending the rearmost end of the staple strip 300 engages the stopper engaging part 209. You can continue.

The position where the rear end stopper 303 of the staple strip 300 is caught by the stopper engaging portion (projection member) 209 is upstream of the retainer spring 208 in the feeding direction. Even after the operation is continued, before the stopper 303 at the rearmost end of the staple strip 300 comes off the retainer spring 208, the rear end stopper 303 is always caught by the stopper engaging portion 209, and the staple is mechanically stapled. Strip 3
00 cannot be sent. Therefore, the cartridge 20
Even if 0 is extracted from the body 30 of the stapler 1 at any time, the staple strip 300 remaining in the cartridge 200 is always taken out together with the cartridge 200 and does not remain on the stapler side. For this reason, even if the cartridge 200 loaded with the new staple band 300 is inserted into the stapler body, the remaining needles are disturbed in a band-like arrangement inside the stapler, causing malfunctions such as poor needle punching and staple jam. There is no.

To remove the cartridge 200 from the body 30, the cartridge lock lever 10 is manually operated.
9 is rotated clockwise in FIG. 9 around the hinge shaft 31 so that the locking claw 101a of the lever 101 is
0 from the ear 214 provided on the rear end face.

The removed cartridge 200 pushes the center of the storage section 201 on the opening / closing cover B from both sides and bends inward, so that the lock arm 212 and the lock receiver 2
13 is released, and the opening / closing cover B is opened about the pivot 211 with respect to the case main body A as shown in FIG. This allows
Retainer spring 208 of cartridge case 210
And the sheet rear end stopper engaging portion 209 are opened from the bottom (bottom plate 203) side. At this time, since the retainer spring 208 is attached to the case body A, it does not fall. Therefore, since the remaining staple band can be taken out and removed, the cartridge case 210 can be loaded with a new staple band. At this time, the distal end portion 30 of the staple
5 is a front side portion 203a of the bottom plate portion 203 and a guide ridge 2
05 through the lead-out path 206 formed.

When the cover B is closed, the lock arm 2
Numerals 12 enter the inside of the lock receiver 213 of the case main body A and fit each other perfectly. At this time, since the cover lock arm 212 has a wedge-shaped shape (FIG. 4), the cover lock arm 212 enters the lock receiver 213 in the closing direction.
Once locked together, there is a new staple strip 300 inside the storage section 201, so the lock arm 2
It becomes difficult to flex and open. This prevents the cartridge from being opened by mistake when the cartridge is mounted on the stapler.

Further, by closing the opening / closing cover B, the bottom plate portion 203 previously divided into 203a and 203b is opened.
Are continuously integrated, and a lead-out path 206 from the storage section 201 to the tip end section 202a is completed below the extension section 202 of the cartridge 200.

The cartridge 200 after the refilling of the staple strip 300 is mounted on the body 30 of the stapler 1. At the time of this mounting, the front end 202a of the lead-out side wall 204 of the cartridge 200 is fitted into the opening 100 (see FIG. 9) of the body 30, and the ear 214 provided on the rear end face is manually operated. The cartridge 200 and the body 30 are correctly positioned by being stopped by the locking claws 101a of the cartridge lock lever 101 rotated by the rotation. When the cartridge 200 is mounted, the leading end 203 c of the bottom plate 203 of the lead-out path 206 also faces the opening 100 of the body 30 and terminates. The tip 2 of the bottom plate 203
03c functions to determine a reference position when the staple strip 300 is cut off.

The stapler 1 sends out the leading end of the staple strip 300 extending from the cartridge 200 into the holding groove 64 of the molding block 60 by the feed mechanism (75, 90 to 94) as the feed means 6. The leading end staple 301 held in the holding groove 64 is first formed into a U-shape by a driving operation by the driver 80, and then the staple 301 is driven into a sheet.

(3) Other Embodiments In the above embodiment, the case body A and the opening / closing cover B
The bottom plate 203 is divided downstream from the retainer spring 208 serving as a return prevention means in the cartridge extension part 202, and the rear side can be freely opened and closed from between the case tip 202a and the return prevention means 208.
A dividing line can be set at an arbitrary position between the case front end 202a and the stopper engaging portion 209, and the stopper engaging portion 209 is connected to the extending portion 202 of the cartridge 200.
At any position in the region.

FIG. 11 shows the case where the bottom plate portion 203, which is divided into the case body A and the opening / closing cover B, is set upstream of the retainer spring 208 in the cartridge extension portion 202, and the return prevention means and the stopper engagement portion 209 are provided. This is an example in which a portion on the rear side from the center can be opened and closed around a pivot 211. Although the staple strip 300 is held down by the retainer spring 208 serving as a reverse return preventing means, since the sheet trailing end stopper 209 is opened, the rear end of the remaining staple strip 300 is cut off and the staple sheet is pulled out in the feed direction. By removing
A new staple strip 300 can be loaded.

FIG. 12 shows an example in which the rear side from the case front end 202a is continuous and can be freely opened and closed.
The whole is opened and closed around the pivot 211. From the tip of the cartridge case 210, the retainer spring 208
And the sheet rear end stopper engaging portion 209 is opened.
The remaining staple band can be removed and a new staple band 300 can be loaded.

The above-mentioned cartridge is provided with an opening / closing cover B.
Is a type that opens and closes around a shaft on the rear side of the case, but the opening and closing mechanism is not limited to this.

For example, as shown in FIG.
May slide in the front-rear direction of the case with respect to the case body A to open and close.

Further, as shown in FIG. 14, at the bottom of the cartridge case 210, the opening / closing cover B can be configured to open and close with a hinge 215 located on one side in the width direction of the case as a center.

Further, as shown in FIG. 15, at the bottom of the cartridge case 210, the cover B can be configured to slide in the width direction of the case to open and close.

13 to 15, it is preferable that the opening / closing cover B and the case main body A are provided with a lock mechanism that locks each other.

[0081]

In summary, according to the present invention, the following excellent effects can be obtained.

1) The staple band member according to claim 1 or 14, wherein the stopper portion provided at the rear end of the staple band member engages with the stopper engaging portion provided at the cartridge case. In a configuration in which reverse movement preventing means is provided between the front end of the case and the stopper engaging portion, the case staple band and the case front end are exchanged with each other. An opening / closing cover is provided so that the rear side can be freely opened and closed from an arbitrary position between the stopper engaging portion and the position.

Therefore, according to the present invention, by opening the open / close cover of the cartridge case, the engagement of the retainer spring portion and the seat rear end stopper engaging portion with the staple band material is released. So that
Even if the retainer spring portion exists, the remaining staple band can be easily taken out, and a new staple band can be loaded without discarding the retainer spring and the stopper portion. Therefore, even if the cartridge has no staple band, the cartridge can be used again effectively by refilling the staple band without discarding the cartridge together with the retainer spring and the stopper.

Further, even if the cartridge is detached from the stapler at any time after the stapling operation is performed several times after the trailing end of the staple band is detected, the sheet rear end of the staple band may be stopped by the stopper. Since the staple strip is not left in the stapler because it is engaged with the joining portion, the staple strip is taken out together with the cartridge.

2) According to the second and fifteenth aspects of the invention, the rear side from the front end of the cartridge case is opened as an opening / closing cover, and the retainer spring portion and the seat rear end stopper engaging portion are released, so that the cartridge case remains. The staple band can be removed and a new staple band can be loaded.

3) According to the third and sixteenth aspects of the present invention, the rear side is opened as an opening / closing cover from between the front end of the case and the reverse prevention means, and the retainer spring portion and the seat rear end stopper engaging portion are released. Thus, a new staple strip can be loaded in the same manner.

According to the fourth and seventeenth aspects of the present invention, since the open / close cover is openable and closable on the rear side from between the reverse prevention means and the stopper engaging portion, the cover is pressed by the reverse prevention means. Since the sheet trailing end stopper is also opened for the staple strip, the trailing end of the remaining staple strip is cut off, and the sheet is pulled out and removed in the feed direction, so that a new staple strip can be loaded.

5) The effect that the new staple band can be loaded is that the case having only the return prevention means (claim 18) or the opening / closing cover is opened and closed about the case rear side of the mating case as an axis ( Claims 5 and 19),
The partner case is slid in the front-rear direction to open and close (claims 6 and 20), and the partner case is opened and closed about a shaft located on one side in the width direction of the partner case (claims 7 and 2).
1), it can be obtained even under the configuration of sliding in the width direction of the counterpart case to open and close (claims 8 and 22).

6) In the invention of claims 9 and 23,
Since the opening / closing cover is provided with a lock mechanism that is locked to the counterpart case, the opening / closing cover is integrated with the counterpart case to facilitate handling.

7) In the lock mechanism according to the twenty-fourth aspect, the lock arm has a wedge-shaped cross-section at one end of the opening / closing cover at a contacting portion between the opening / closing cover and the mating case which are in contact with each other. And a complementary lock receiver formed on the other case body and engaged with the lock arm. The lock arm is formed so as to be elastically deformable in the width direction of the case. When staples are contained in the staples, the staples restrict the bending in the width direction and cannot be opened. However, when the staples are lost, the staples can be bent in the width direction, unlocked and opened. For this reason, it is possible to prevent the cover from being opened carelessly before the staples run out.

8) According to the tenth to thirteenth and twenty-fifth aspects, it is possible to obtain a configuration which can be easily concretely realized.

[Brief description of the drawings]

FIG. 1 is a diagram showing an opened state of a cartridge of the present invention.

FIG. 2 is a perspective view showing a stapler band material put in the cartridge of the present invention.

FIG. 3 is a diagram showing an opening / closing cover B side of the cartridge of FIG. 1;

FIG. 4 is a sectional view of the cartridge on the side of an opening / closing cover B along the line IV-IV in FIG. 1;

FIG. 5 is a side view showing the overall configuration of the stapler of the present invention.

FIG. 6 is a plan view of the stapler of FIG. 5;

FIG. 7 is a front view of the stapler of FIG. 5;

FIG. 8 is a diagram showing an overall configuration of a stapler according to the present invention.

FIG. 9 is a diagram showing a head unit side of the stapler of the present invention.

FIG. 10 is an enlarged view of a part of the stapler of the present invention.

FIG. 11 is a view showing another embodiment of the cartridge of the present invention.

FIG. 12 is a view showing still another embodiment of the cartridge of the present invention.

FIG. 13 is a view showing another embodiment of the cartridge of the present invention.

FIG. 14 is a view showing still another embodiment of the cartridge of the present invention.

FIG. 15 is a view showing still another embodiment of the cartridge of the present invention.

FIG. 16 is a diagram showing the operation of a conventional cartridge and stapler.

FIG. 17 is a diagram showing an outline of a configuration of a conventional cartridge. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stapler 2 Frame 3 Head unit 4 Insertion means 5 Bending means (clinch part) 6 Sending means 14 Needle detection sensor (staple trailing end detection) 20 Base part 21 Anvil (Bending means) 22 Side wall 22a Ear 23 Stopper member 24 Clinch lever Reference Signs List 25 support jaw 26 lever 27 shaft 30 body 31 hinge shaft 32 receiving base portion 32a bottom portion 34 front upright portion 35 top portion 36 guide column 40 front outer shell portion 50 spring 51 drive motor 52, 53 gear 54 large gear 55 drive arm 55a opening 55b Slit 56 Arm shaft 57 Cam surface 58 Drive roller 59 Coil spring 60 Molding block 62 Tip 64 Holding groove 70 Former (U-shaped bending member) 75 Projection 80 Driver (driver) 81 Upper head 81a Shaft 8 Vertical elongated hole 84 Driving pushing claw 86 Driving blade 90 Feeding member (feeder) 91 Feed spring (elastic part) 92 Feeding claw 93 Shaft 94 Cam surface 100 Body opening 101 Cartridge lock lever 101a Locking claw 200 Staple cartridge 201 Storage part 202 Extension part 202a Tip part 203 Bottom plate part 203a Part of front side 203b Part of rear side 203c Tip part 204 Outlet road side wall part 205 Guide ridge 206 Outlet path 207 Projection (fulcrum) 208 Retainer spring (return preventing means 209 Stopper engaging portion 210 Cartridge case 211 Axis 212 Lock arm 213 Lock receiver 214 Ear 215 Hinge 300 Staple strip 301 Straight staple (unformed short wire) 302 Adhesive tape 303 Last end stopper 304 Rolled part 305 Tip part A Case body (counterpart case) B Open / close cover 400 Straight staple (unformed short wire) 401 Staple band 401a Tip staple 401 'Stopper part at last end 402 Cartridge 403 Retainer spring (return preventing means) 403 'Stopper engaging portion 404 Arrow 405 Driver 409 Molding block 409a Holding groove 410 Former 501 Needle detection sensor

Claims (27)

(57) [Claims] 1. A detachable cartridge containing a staple band in which a number of linear staples are connected in a band, a detecting means for detecting that the remaining amount of staples in the cartridge has reached a predetermined amount, Insertion means for sequentially inserting the staples in the cartridge into the binding sheet from the leading end, sending out means for sending out the staple band material in the cartridge to the inserting means, and bending the leading end of the staple inserted into the binding sheet by the inserting means. A stapler provided with a bending unit, wherein the staple cartridge includes a case in which the staple band is movably accommodated at an insertion position by an insertion unit; a stopper provided at a rear end of the staple band; The case is provided from the position where the detecting means detects the remaining amount of staples. A stopper engaging portion provided on the distal end side and engaging with the stopper portion to prevent the movement of the staple band; provided on the case, located between the distal end of the case and the stopper engaging portion. A reverse-return preventing means for preventing the staple band from returning, and a rear side freely openable and closable from an arbitrary position between the front end of the case and the stopper engaging portion so that the staple band can be replaced, provided on the case. A stapler characterized by having an opening and closing cover. 2. A detachable cartridge accommodating a staple band material in which a number of linear staples are connected in a band shape, detecting means for detecting that a remaining amount of staples in the cartridge has reached a predetermined amount, Insertion means for sequentially inserting the staples in the cartridge into the binding sheet from the leading end, sending out means for sending out the staple band material in the cartridge to the inserting means, and bending the leading end of the staple inserted into the binding sheet by the inserting means. A stapler provided with a bending unit, wherein the staple cartridge includes a case in which the staple band is movably accommodated at an insertion position by an insertion unit; a stopper provided at a rear end of the staple band; The case is provided from the position where the detecting means detects the remaining amount of staples. A stopper engaging portion provided on the distal end side and engaging with the stopper portion to prevent the movement of the staple band; provided on the case, located between the distal end of the case and the stopper engaging portion. A back-up preventing means for preventing the staple band from returning, and an opening / closing cover provided on the case and capable of opening and closing the rear side from the case tip so that the staple band can be replaced. Stapler. 3. A detachable cartridge accommodating a staple band material in which a number of linear staples are connected in a band shape, detecting means for detecting that a remaining amount of staples in the cartridge has reached a predetermined amount, Insertion means for sequentially inserting the staples in the cartridge into the binding sheet from the leading end, sending out means for sending out the staple band material in the cartridge to the inserting means, and bending the leading end of the staple inserted into the binding sheet by the inserting means. A stapler provided with a bending unit, wherein the staple cartridge includes a case in which the staple band is movably accommodated at an insertion position by an insertion unit; a stopper provided at a rear end of the staple band; The case is provided from the position where the detecting means detects the remaining amount of staples. A stopper engaging portion provided on the distal end side and engaging with the stopper portion to prevent the movement of the staple band; provided on the case, located between the distal end of the case and the stopper engaging portion. A reversing prevention means for preventing reversion of the staple band, and an opening / closing cover provided on the case and capable of freely opening and closing the rear side from between the front end of the case and the reversion preventing means so that the staple band can be replaced. A stapler comprising: a stapler; 4. A removable cartridge accommodating a staple band material in which a number of linear staples are connected in a belt shape, detecting means for detecting that the remaining amount of staples in the cartridge has reached a predetermined amount, Insertion means for sequentially inserting the staples in the cartridge into the binding sheet from the leading end, sending out means for sending out the staple band material in the cartridge to the inserting means, and bending the leading end of the staple inserted into the binding sheet by the inserting means. A stapler provided with a bending unit, wherein the staple cartridge includes a case in which the staple band is movably accommodated at an insertion position by an insertion unit; a stopper provided at a rear end of the staple band; The case is provided from the position where the detecting means detects the remaining amount of staples. A stopper engaging portion provided on the distal end side and engaging with the stopper portion to prevent the movement of the staple band; provided on the case, located between the distal end of the case and the stopper engaging portion. A reversing prevention means for preventing reversion of the staple band, and an opening / closing cover provided on the case and capable of freely opening and closing the rear side from between the reversion preventing means and the stopper engaging portion so that the staple band can be replaced. And a stapler comprising: 5. The opening / closing cover according to claim 1, wherein the opening / closing cover opens and closes about a case rear side of a mating case.
The stapler according to 3 or 4. 6. The opening / closing cover according to claim 1, wherein the opening / closing cover slides in a front-rear direction of a counterpart case to open / close.
The stapler according to 2, 3, or 4. 7. The stapler according to claim 1, wherein the opening / closing cover opens and closes around a shaft located on one side in the width direction of the counterpart case. 8. The apparatus according to claim 1, wherein said opening / closing cover slides in a width direction of a counterpart case to open / close.
The stapler according to 2, 3, or 4. 9. The stapler according to claim 1, wherein the opening / closing cover is provided with a lock mechanism which is locked to a counterpart case. 10. The stapler according to claim 1, wherein the case is formed of a light-transmitting synthetic resin, and the return preventing means is formed of a metal spring. 11. The apparatus according to claim 11, wherein the insertion unit includes a driver, a drive arm connected to the left and right sides of the driver, and a motor disposed on the bending unit side to drive the drive arm to move the driver up and down. Claims 1, 2,
The stapler according to 3 or 4. 12. The insertion means and the bending means are rotatably coupled about an axis, and the axis is a rotation of a drive transmission shaft to the left and right drive arms and a lever for fixing a mounted cartridge. 2. The system according to claim 1, wherein the shaft also serves as a shaft.
The stapler according to 1. 13. The stapler according to claim 1, wherein the bending means is provided with a stopper member for preventing jam staples from entering inside. 14. A staple cartridge in which a staple strip which is detachably attached to a stapler and in which a number of linear staples are connected is housed in a case, and staples are inserted one by one into a binding sheet by driving the stapler. A stopper provided at the rear end of the staple band, and provided on the case, engages with the stopper when the remaining amount of the staple band reaches a predetermined amount, and moves the staple band. A stopper engaging portion for preventing the staple band, provided on the case, and located between the tip of the case and the stopper engaging portion for preventing the staple band material from returning, a staple provided on the case; An opening / closing cover that allows the rear side to be freely opened and closed from any position between the case tip and the stopper engaging portion so that the band material can be replaced. Staple cartridge, characterized in that. 15. A staple cartridge in which a staple strip material detachably attached to a stapler and connected with a number of linear staples is accommodated in a case, and staples are inserted one by one into a binding sheet by driving the stapler. A stopper provided at the rear end of the staple band, and provided on the case, engages with the stopper when the remaining amount of the staple band reaches a predetermined amount, and moves the staple band. A stopper engaging portion for preventing the staple band, provided on the case, and located between the tip of the case and the stopper engaging portion for preventing the staple band material from returning, a staple provided on the case; A staple cartridge that has an opening / closing cover that can be freely opened and closed from the front end of the case so that the band material can be replaced. . 16. A staple cartridge in which a staple strip material detachably attached to a stapler and having a plurality of linear staples connected thereto is accommodated in a case, and staples are inserted one by one into a binding sheet by driving the stapler. A stopper provided at the rear end of the staple band, and provided on the case, engages with the stopper when the remaining amount of the staple band reaches a predetermined amount, and moves the staple band. A stopper engaging portion for preventing the staple band, provided on the case, and located between the tip of the case and the stopper engaging portion for preventing the staple band material from returning, a staple provided on the case; An opening / closing cover is provided so that the rear side can be opened and closed between the front end of the case and the reversing prevention means so that the band material can be replaced. The staple cartridge. 17. A staple cartridge in which a staple strip which is detachably attached to a stapler and in which a plurality of linear staples are connected is accommodated in a case, and staples are inserted one by one into a binding sheet by driving the stapler. A stopper provided at the rear end of the staple band, and provided on the case, engages with the stopper when the remaining amount of the staple band reaches a predetermined amount, and moves the staple band. A stopper engaging portion for preventing the staple band, provided on the case, and located between the tip of the case and the stopper engaging portion for preventing the staple band material from returning, a staple provided on the case; An opening / closing cover that allows the rear side to be freely opened and closed from between the reverse prevention means and the stopper engaging portion so that the band material can be replaced. Staple cartridge. 18. A cartridge accommodating a staple band which is detachably attached to a stapler and to which a plurality of linear staples are connected, comprising: a circular accommodating portion accommodating the staple band; and a staple band from the accommodating portion. A staple cartridge comprising: an extension portion extending so as to extend a tip portion of the material in a tangential direction; and a retainer spring for preventing a staple band material from returning in the middle of the extension portion. In order to be able to exchange the material, an arbitrary position between the end of the case and the stopper engaging portion at the bottom of the extension portion is formed as a cut, and the rear side thereof is configured as an openable and closable cover. Staple cartridge. 19. The opening and closing cover according to claim 14, wherein the opening and closing cover opens and closes about a case rear side of a mating case.
The staple cartridge according to 15, 16, 17 or 18. 20. The opening / closing cover according to claim 1, wherein the opening / closing cover slides in a front-rear direction of a counterpart case to open / close.
The staple cartridge according to 4, 15, 16, 17, or 18. 21. The staple cartridge according to claim 14, wherein the opening / closing cover opens and closes around a shaft located on one side in the width direction of the counterpart case. 22. The opening / closing cover according to claim 1, wherein the opening / closing cover slides in the width direction of the counterpart case to open / close.
The staple cartridge according to 4, 15, 16, 17, or 18. 23. The open / close cover is provided with a lock mechanism for locking to a counterpart case.
23. The staple cartridge according to 21 or 22. 24. A lock mechanism, comprising: a lock arm having a wedge-shaped cross section at one end of an opening / closing cover at a contact portion between an opening / closing cover and a mating case which are in contact with each other; 24. The staple cartridge according to claim 23, wherein the staple cartridge is formed of a complementary lock receiver that is formed on the lock arm and engages with the lock arm, and the lock arm is formed so as to be elastically deformable in a width direction of the case. 25. The case according to claim 14, wherein the case is formed of a light-transmitting synthetic resin, and the return preventing means is formed of a metal spring.
The staple cartridge according to 7, 18, 19, 20, 21 or 22. 26. A detachable cartridge accommodating a staple band material in which a number of linear staples are connected in a band shape, insertion means for sequentially inserting the staples in the cartridge from the front end to a binding sheet, and In a stapler provided with a feeding unit that sends a staple band to the insertion unit and a bending unit that bends a tip of a staple inserted into a binding sheet by the insertion unit, the staple cartridge includes the staple band by the insertion unit. A case movably housed in the insertion position, a reversion preventing means provided in the case to prevent the staple band from returning, and a rear side from the front end of the case provided in the case so that the staple band can be replaced. Opening and closing cover that can be freely opened and closed. Pula. 27. A staple cartridge in which a staple strip which is detachably attached to a stapler and in which a plurality of linear staples are connected is accommodated in a case, and staples are inserted one by one into a binding sheet by driving the stapler. A backstop preventing means provided on the case to prevent the staple band from returning, and an opening / closing cover provided on the case and capable of opening and closing the rear side from the end of the case so that the staple band can be replaced. Staple cartridge characterized by the following.