JPH061339Y2 - Staple cartridge - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is to stack and store staple sheets formed by adhering a predetermined number of unformed staples in a sheet shape, and sequentially stack them from the bottom staple sheet to the stapler body side. The present invention relates to a staple cartridge adapted to be sent out.

(Prior art and its problems) The stapler to which this kind of staple cartridge is attached and used is that when the staple driving operation is performed, the staple belt in the lowermost stage in the staple cartridge is sequentially formed and driven by the feed belt provided on the stapler side. The straight staple needle at the foremost portion is first formed into a U-shape, and the formed staple needle is then ejected toward the material to be bound.

By the way, the internal size of the staple accommodating portion inside the cartridge body is formed to be slightly larger than the staple sheet. Therefore, as shown in FIG. 5 (a), a clearance S is created between the inner wall of the cartridge body 25 and the staple sheets 4 stacked and stored inside. Moreover, since the staple cartridge 4 is mounted on the stapler body in a slightly rearward tilted state, and the staple sheet 4 is violently moved in the vertical direction during the staple driving operation, the staple sheet 4 moves each time and all rear ends of the staple cartridge 4 are located behind the cartridge body 25. Aligned against the wall. As a result, the clearance S is generated between the front end of the stacked staple sheets 4 and the inner surface of the front wall of the cartridge body 25.

In this state, the lowermost staple sheet 4a is fed by the feed belt 17, the rear end thereof reaches the vicinity of the discharge port 26, and the second-stage staple sheet 4b from the bottom comes into contact with the feed belt 17 to receive the feed force. It is sent to the discharge port 26 side. However, the second-stage staple sheet 4b cannot enter the discharge port 26. Its front end engages the front wall inner surface 27 of the cartridge body. On the other hand, since the staple sheets located above the staple sheet 4b are aligned against the rear wall surface as described above, the portion which is not in contact with the feed belt 17 on the front side of the staple sheet 4b due to the overlap with the rear end of the staple sheet 4a. The load of the staple sheet located above the staple sheet 4b acts as a shearing force, and the front portion of the staple sheet 4b is bent and the bent portion 28 is ejected as shown in FIG. A phenomenon may occur in which the outlet 26 is clogged and blocked.

(Technical problem of the invention) The technical problem of the present invention is to solve the above-mentioned drawbacks, and particularly to propose a staple cartridge capable of smoothly and surely discharging staple sheets stacked and stored inside from the cartridge body. To do.

(Means for Solving the Problems) In order to solve the above problems, a staple cartridge according to the present invention is a cartridge for stacking and storing staple sheets formed by adhesively connecting a predetermined number of straight unformed staples in a sheet shape. An opening for receiving the feeding means provided on the stapler main body side, leaving the holding portions on both sides of the lower surface of the lowermost staple sheet at the bottom of the main body, and for bringing the feeding means into contact with the lowermost staple sheet. To form
A discharge port for the lowermost staple sheet is formed at the lower end of the front wall, and an inclined surface is formed inside the upper opening edge of the discharge port, and the staple sheet is formed on the uppermost staple sheet at the bottom opening. In a staple cartridge provided with a pressing means for urging toward, a one end of the staple cartridge is engaged with a rear wall side of the cartridge body, and the other end of the staple cartridge is rearward from a rear end of the lowermost staple sheet. A feeding film reaching a part of the lower surface is arranged, and the feeding means displaces the other end side of the feeding film together with the lowermost staple sheet toward the discharge port side. .

(Operation and Effect of the Invention) According to the above configuration, when the staple cartridge is mounted on the stapler and driven into operation, the staple sheet in the cartridge body is subjected to a large contact friction with the feeding means by the urging force of the pressing means. Because it works
When the feeding unit rotates, a strong feeding force acts on the lowermost staple sheet, and the staple sheet is ejected from the ejection port of the cartridge body. At the same time, the other end of the feed film is also engaged with the feed means and pulled in the same direction. As a result, before the rear end of the lowermost staple sheet exits from the discharge port, the staple sheet located on the other end of the feeding film above the lowermost staple sheet is also on the inclined surface side. Moving. Therefore, the clearance between the inner surface of the front wall of the cartridge body and the moved staple sheet is filled. Therefore, before the lowermost staple sheet is completely sent out from the discharge port, only the second-stage staple sheet is fed toward the discharge port by the feed belt, so that the second-stage staple sheet that has climbed up to the rear end of the lowermost staple sheet is reached. The conventional problem that the front end portion of the staple sheet of the eye is bent by the load of the staple sheet of the third step or more is solved. When the second staple sheet is dropped to the lowermost stage after the lowermost staple sheet is discharged, the front end of the second staple sheet is guided by the inclined surface and faces the discharge port, so that it is reliably fed by the feed belt. In this way, the staple sheets in the cartridge body are sequentially and surely ejected smoothly, and the ejection port is not clogged due to the bending of the staple sheets. Therefore, the practical effect of the present invention is very large.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral A is a staple cartridge, and the staple cartridge A is composed of a cartridge main body 1, a pressing means 2 and a feeding film 3.

The cartridge body 1 is a staple sheet 4 in which a predetermined number of straight unformed staples are adhesively connected in a sheet shape.
As shown in FIG. 2, an opening portion 7 is formed in the bottom portion of the lowermost staple sheet 4a except the holding portions 6 on both sides of the lower surface thereof. A discharge port 9 for the lowermost staple sheet 4a is formed at the lower end of the front wall 8, and an inclined surface 10 is formed inside the upper opening edge of the discharge port 9, and the cartridge body 1
The engaging projection 12 (see FIG. 3) is provided on the rear wall 11 of the storage portion 5 of
Are formed. A number of engaging grooves 13 are continuously formed in the vertical direction along the centers of the inner surfaces of the front wall 8 and the rear wall 11, and 14 is a guide rib for the discharged staple sheet 4.

Next, the pressing means 2 is located on the lowermost staple sheet 4 by using gravity or a spring to urge the staple sheet 4 toward the bottom opening portion 7, and is flexible before and after the main body 2a. The elastic spring piece 2b is projected, and the tip of the spring piece 2b is cut into the engaging groove 13 of the cartridge body 1 to prevent the pressing means 2 from moving upward when the cartridge body 1 vibrates. Is configured.

Further, as shown in FIG. 3, the upper portion 3a of the feeding film 3 is folded back in a U-shape, and the folding piece 16 is formed with an engaging opening 16a. A through opening 15 is formed in the central portion 3b, and the lower end 3c is bent into an L shape. Further, in the above-mentioned feed film 3, the engaging opening 16a of the upper folding piece 16 is provided in the engaging protrusion 1 of the cartridge body 1.
It is arranged inside the cartridge body 1 by engaging with 2. At this time, the continuous engagement groove 13 on the inner surface of the rear wall 11 of the cartridge body 1 is exposed from the through opening 15 of the feed film 3.

The manner of mounting the feeding film 3 and the cartridge body 1 is not limited to the above example. For example, the upper end engaging portion of the feed film penetrating from the through hole may be formed outside the through hole (not shown) formed in the middle portion of the rear wall of the cartridge body 1. Further, the pressing means is not limited to the above example. For example, a configuration may be adopted in which a lid is provided at the upper end opening of the storage section, a coil spring is arranged on the back side of the lid, and the coil spring biases the coil spring.

The staple sheets 4 are stacked and stored in the storage portion 5 of the cartridge body 1 in multiple stages, and the staple sheets 4a at the bottom are stored.
Both sides of the lower surface of the cartridge are supported by the holding portions 6 of the cartridge body 1. The pressing means 2 is mounted on the uppermost staple sheet 4. The central portion 3b and the lower end bent portion 3c of the feeding film 3 are arranged from the rear end surface of the lowermost staple sheet 4a to a part of the lower surface of the lower surface. Also, the pressing means 2
The rear spring piece 2b is the central through opening 1 of the feeding film 3.
5 is engaged with the engaging groove 13 on the inner surface of the rear wall 11 of the cartridge main body 1 exposed from 5.

The staple cartridge A having the above configuration is used by mounting the stapler main body B on the staple cartridge main body B. It comprises a base 21 having a stapler main body B binding base 20 and a magazine 22 pivotally supported at one end thereof, and the staple cartridge A is attached to a cartridge mounting portion 23 of the magazine 22.
A feed belt 17 is provided as a feeding means in the cartridge mounting portion 23. The feed belt 17 is received in the bottom opening 7 of the staple cartridge A, and the upper surface of the feed belt 17 is in contact with the lowermost staple sheet 4a and the lower surface of the lower bent portion 3c of the feeding film 3. In the staple cartridge A, a clearance S is created between the inner surface of the front wall 8 and the staple sheet 4 due to mechanical vibration in the vertical direction during driving.

When the stapler is driven into operation in this state,
A large contact friction acts on the feed belt 17 by the urging force of the pressing means 2 on the staple sheet 4a at the lowermost stage, so as shown in FIG.
When the sheet is rotated, a strong feeding force acts on the lowermost staple sheet 4a, and the staple sheet 4a is discharged from the discharge port 9 at the lower end of the front wall 8 of the cartridge main body 1 and further toward the forming driving portion (not shown) of the stapler main body B. Sent. At the same time, the lower end bent portion 3c of the feeding film 3 is also pulled in the same direction by the feeding belt 17 for the same reason. As a result, before the rear end of the lowermost staple sheet 4a exits from the discharge port 9, the staple sheet located above the lowermost staple sheet 4a and located on the lower end bent portion 3c of the feeding film 3 is located. 4b, 4c ... Also move to the inclined surface 10 side. Therefore, the clearance between the inner surface of the front wall 8 of the cartridge body 1 and the moved staple sheet 4 is filled. Therefore, just before the ejection of the lowermost staple sheet 4a, the second staple table 4
Even when b is fed by the feeding belt 17 with a strong force, the front end of the staple sheet 4b is not bent because the staple sheets 4c, 4d, ... Located thereabove do not receive a shearing load. Second staple sheet 4
When the staple sheet 4a at the bottom of b is ejected and descends to the bottom, the front end of the staple sheet 4a is guided by the inclined surface 10 and faces the ejection port 9, so that it is reliably fed by the feed belt 17. In this way, the staple sheets 4 in the cartridge body 1 are sequentially and reliably discharged, and the discharge port 9 is not clogged due to the bending of the staple sheets 4.

The discharged staple sheet is sent to the forming driving section, and is first formed into a U-shape and then is inserted into the material to be bound.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view of a staple cartridge according to the present invention and its mounting mode, FIG. 2 is a perspective view of a bottom side of the staple cartridge, FIG. 3 is a perspective view of the staple cartridge and a feeding film, FIG. 4 is an explanatory view of a usage mode of the staple cartridge, and FIG.
(a) (b) is a partial longitudinal cross-sectional view of the conventional staple cartridge. Reference A: staple cartridge, B: stapler, 1
... Cartridge body, 2 ... Pressing means, 3 ... Feed film, 4 ... Staple sheet, 6 ... Holding section, 7 ... Opening section,
8 ... Front wall, 9 ... Discharge port, 10 ... Inclined surface, 11 ... Rear wall

Claims (1)

[Scope of utility model registration request] 1. A bottom portion of a cartridge main body for accommodating and stacking staple sheets formed by adhesively connecting a predetermined number of straight unformed staples in a sheet shape, leaving holding portions on both sides of the lower surface of the lowermost staple sheet. Forming an opening for receiving the feeding means provided on the stapler main body side and bringing the feeding means into contact with the lowermost staple sheet;
A discharge port for the lowermost staple sheet is formed at the lower end of the front wall, and an inclined surface is formed inside the upper opening edge of the discharge port, and the staple sheet is formed on the uppermost staple sheet at the bottom opening. In a staple cartridge provided with a pressing means for urging toward, a one end of the staple cartridge is engaged with a rear wall side of the cartridge body, and the other end of the staple cartridge is rearward from a rear end of the lowermost staple sheet. A feeding film reaching a part of the lower surface is arranged, and the feeding means displaces the other end side of the feeding film together with the lowermost staple sheet toward the discharge port side. Staple cartridge.