JP2000296477A - Staple projection-preventing mechanism for roll staple cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a connected staple from projecting out of a cartridge at cutting of the connected staple at jamming. SOLUTION: This roll staple cartridge is provided with an accommodating part 3 for accommodating a connected staple having multiple linear staple needles connected and wound in a roll from and a staple feeding passage 4 for feeding the connected staple 2 in the accommodating part 3 to be in a sheet-like form. A moving preventing member 13 for preventing the connected staple 2 from moving to an ejection side is provided at a near side position than an ejecting slot 5 at a tip of the staple feeding passage 4 so as to be freely engaged to and disengaged from the connected staple 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stapler in which, when a leading end of a roll staple is clogged, a portion of the connected staple is cut to remove the staple from the roll staple cartridge. The present invention relates to a staple pop-out prevention mechanism for preventing pop-out.

[0002]

2. Description of the Related Art A stapler is known in which a plurality of straight staples are connected in a belt shape and a staple cartridge containing a connected staple wound in a roll is detachably provided. Also in this type, when a stapling phenomenon occurs at the leading end portion of the connected staple, if the staple comes out of the discharge port of the staple cartridge when a part of the connected staple is cut in order to deal with the phenomenon, it is straightened. There is a possibility that the staple forming mechanism or the driving mechanism may malfunction. Therefore, when the connected staples are cut, it is necessary to prevent the staples from jumping out of the staple cartridge.

[0003]

However, since the connected staples of the roll staples are continuous from the beginning to the end, when the staples are pulled out, the staples come out of the discharge outlet only when they are pulled out. In addition, the staple cartridge is provided with a check pawl for preventing the connected staple from moving in the direction opposite to the pull-out direction. For this reason, even if the protruding portion is returned to the cartridge after cutting the connection staple, the connection staple does not move in that direction. Therefore, even if it is cut, an extra protruding portion must be cut again, and the jam clearing operation is troublesome.

An object of the present invention is to provide a staple pop-out preventing mechanism for a roll staple cartridge which can effectively prevent the connecting staple from jumping out of the cartridge when cutting the connecting staple at the time of jam clearance. The subject.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a staple pop-out prevention mechanism for a roll staple cartridge according to the present invention stores a plurality of straight staples connected to form a staple wound in a roll. In a roll staple cartridge having a storage portion and a staple feed passage for feeding out connected staples in the storage portion in a sheet shape, the staple cartridge is provided with a staple feed passage for guiding the roll-shaped connected staples to be fed out in a sheet shape. In addition, a movement preventing member for preventing the connection staple from moving toward the discharge side is provided at a position before the discharge port at the end of the staple feed passage so as to be capable of engaging and disengaging the connection staple.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 to 4, reference numeral 1 denotes a roll staple cartridge. The roll staple cartridge 1 includes a cartridge main body 1a, a storage section 3 for a connection staple 2, and a connection staple 2 in the storage section 3 as a sheet. And a staple feed passage 4 for feeding the staples. The roll staple storage section 3 is formed so as to be able to store the roll-shaped connected staples 2 as shown in FIG. The connection staple 2 is formed by connecting straight staples in a long band shape and winding the same in a roll shape. When the leading end of the connecting staple 2 is discharged from the outlet 5 at the front end of the feed passage 4, it is formed in a gate shape at the front end of the cartridge body 1a, and further enters the concave groove 7 at the center of the face plate 6 and is not shown. It is driven downward with a driver. The face plate 6 is attached so as to be rotatable about a shaft 8.

The lower portion of the storage section 3 is opened and communicates with the staple feed passage 4, and the outermost end of the connected staple 2 is led out and passes through the staple feed passage 4. In addition, a cap 9 (FIG. 4)
Staple 2 is attached to the cap 9
Is opened so that it can be stored in the storage section 3.

The staple feed passage 4 is continuous from the lower open end of the storage section 3 and is formed between the upper guide plate 4a and the lower guide plate 4b. The lower surface of the upper guide plate 4a is shown in FIG. Staples 2 are arranged so that the two check pawls 10 are inclined forward and move forward of the feed passage 4.
Does not move backwards. Reference numeral 11 denotes a feed claw, which is attached to a feed lever 12 provided to be movable back and forth.

As shown in FIG. 3, at the front end of the staple feed passage 4 before the discharge port 5, openings 1 are formed at both sides of the center of the feed passage 4 of the upper guide plate 4a and the lower guide plate 4b.
2 are formed. As shown in FIGS. 4, 5 and 6, below the opening 12, a movement preventing member 13 for preventing the connecting staple 2 from moving toward the discharge side is arranged. The movement preventing member 13 is a plate-like base 1.
4 has a metal spring plate 15 fixed to the lower surface thereof.
5, the rear part is branched into a center piece 16 and both side pieces 17 as shown in FIG. 6, and the tip of the center piece 16 is bent into an inverted V-shape.
The tips of the side pieces 17 are bent upward to form the movement preventing claws 18. The movement preventing claw 18 is arranged so as to face the opening 12 as shown in FIG.
A protruding piece 19 is formed on the upper front end of the base 14.

As shown in detail in FIG. 7, the movement preventing member 13 is disposed below the lower guide plate 4b, and is mounted on the lower surface of the lower guide plate 4b so that the protruding piece 19 abuts thereon.
An operation lever 20 is provided below the movement preventing member 13.
Is arranged. Both end portions of the rear end of the operation lever 20 are recessed portions 21 formed on both side walls of the cartridge 1.
, And is provided so as to be rotatable about 90 degrees around the engaging portion. In the state shown in FIG. 7, the distal end portion 18a of the movement preventing claw 18 is located below the feed path 4, and the connecting staple 2
Does not engage with. By rotating the operation lever 20 as shown in FIG.
Pushes up the lower surface of the movement preventing member 13, so that the movement preventing member 13
The movement prevention claw 18 is configured to rotate around the contact portion P with the center b, thereby protruding into the feed passage 4.

In the above configuration, when the roll staple cartridge 1 is mounted on the stapler main body, the connected staples 2 are gradually fed to the discharge port 5 side by a feed mechanism (not shown). The connected staples 2 are formed into a gate shape at a discharge port 5 by a staple forming mechanism (not shown), and are driven into a material to be driven by a driving driver to perform a spelling operation.

By the way, the connected staple 2 discharged from the discharge port 5 may be jammed due to buckling or the like at the time of driving or the like. In this case, the roll staple cartridge 1 is removed from the stapler main body 1a, and FIG.
Is rotated to expose the discharge port 5,
The connecting staple 2 is pulled out a little, and the operation lever 20 is rotated as shown in FIG. The movement preventing member 13 is a contact portion P between the projecting piece 19 of the base 14 and the lower guide plate 4b.
, And the movement preventing claw 18 projects into the feed passage 4 and engages with the lower surface of the connection staple 2. afterwards,
The discharged connected staples 2 are torn off and cut, and the clogged portions of the connected staples 2 are removed. When cutting the connected staples 2, the staples receive a force in a direction in which the staples are pulled out to the front on the discharge side as a whole.
Cannot move because it is engaged with the movement preventing claw 18. For this reason, the connected staples 2 do not protrude forward from the outlet 5 at the time of cutting. When the jam processing is completed, the engagement with the connection staple 2 may be released by rotating the operation lever 20 in the reverse direction and moving the movement preventing claw 18 downward. Thus, if the cartridge is set in the stapler body, subsequent operations can be smoothly continued.

[0013] The roll staple cartridge may be detachably attached to the operation of the operation lever. In other words, when the cartridge is removed from the stapler body, the operation lever interlocks with this to prevent the connected staples from moving freely, and when the cartridge is installed, the operation lever interlocks with this to move in the opposite direction. It may be configured so as to rotate and allow the connecting staple to move freely.

Further, the movement preventing member is not limited to the metal spring plate 15 fixed to the lower surface of the base 14 as described above. For example, a high friction member such as rubber may be engaged with and disengaged from the connecting staple.

[Brief description of the drawings]

FIG. 1 is a side view of a roll staple cartridge.

FIG. 2 is a bottom view of the cartridge.

FIG. 3 is a perspective view of the cartridge.

FIG. 4 is a central longitudinal sectional view of the cartridge.

FIG. 5 is a perspective view of the cartridge with the upper and lower guide plates removed.

FIG. 6 is a perspective view of a spring plate constituting the movement preventing claw.

FIG. 7 is an enlarged sectional view of a staple pop-out prevention mechanism;

FIG. 8 is an operation mode diagram of the staple pop-out prevention mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll staple cartridge 2 Connecting staple 3 Storage part 4 Staple feed path 18 Movement prevention claw

Claims (1)

[Claims] 1. A roll staple cartridge comprising: a storage section for storing a plurality of straight staples connected to each other and storing a connection staple wound in a roll; and a staple feed passage for feeding the connection staples in the storage section into a sheet. At a position before the discharge port at the end of the staple feed path,
A staple pop-out prevention mechanism for a roll staple cartridge, wherein a movement preventing member for preventing the connected staples from moving to the discharge side is provided so as to be capable of engaging and disengaging the connected staples.