JP4985089B2 - Staple cartridge - Google Patents

Description

  The present invention relates to a staple cartridge used for an electric stapler, and particularly to a staple cartridge provided with a staple pressing mechanism.

  Electric staplers and stand-alone electric staplers incorporated in copiers, binding processors, etc. are detachable from the cartridge for the convenience of staple replenishment. The cartridge is replaced with a cartridge, or a staple sheet is loaded into the staple cartridge and mounted on the electric stapler again (Patent Documents 1, 2, 3, etc.).

  Regarding replenishment of staple sheets, the original electric stapler was generally of a type that replaces the entire staple cartridge, but in recent years, as a structure for loading a refill container in which staple sheets are stacked and loaded into the staple cartridge, a refill container is used. In many cases, only the staple cartridge is replaced and the staple cartridge can be used repeatedly (for example, Patent Documents 4 and 5).

  5 and 6 show an example of a refill container exchangeable staple cartridge, and FIG. 7 shows a refill container 21 loaded in the staple cartridge 1. FIG. The staple cartridge 1 shown in FIGS. 5 and 6 includes a plastic base frame 2 and an upper cover 3. The upper cover 3 is connected to a shaft 5 provided at the lower rear end of the left and right side plate portion 4 of the base frame 2, and when the upper cover 3 is closed as shown in FIG. 5, both the left and right sides of the front end portion of the upper cover 3 An outward hook 6 provided on the base frame 2 is engaged with the holes 7 of the left and right side plate portions 4 of the base frame 2 from the inner surface side and fixed in a closed state.

  The hook-shaped levers 8 attached to the left and right sides of the upper cover 3 of the staple cartridge 1 are capable of rotating backward at the lower end with the upper and lower intermediate portions as fulcrums. The compression coil spring 9 in FIG. It is biased to the forward initial position. When the staple cartridge 1 is mounted on the electric stapler, the hook type lever 8 engages with the engaging portion of the electric stapler, and the staple cartridge 1 is fixed.

  Depending on the position of the electric stapler, the staple cartridge 1 may be attached to the electric stapler in the upright position shown in FIG. 5 or may be attached in an inverted position that is upside down from FIG. When attaching / detaching to / from the electric stapler, the handle portion 10 provided at the rear end of the upper cover 3 is held and the attachment / detachment operation to the electric stapler is performed.

  When replacing the refill container 21 by using up the staple sheet in the refill container 21, if the front edge of the left and right sides of the upper cover 3 is clamped with two fingers, the hook 6 will be attached to the left and right sides of the base frame 2. If the front part of the upper cover 3 is lifted off the hole 7 as it is, the upper cover 3 is reversed backward as shown in FIG. 6, the upper surface of the base frame 2 is opened, and the refill container 21 is exposed. A pressing lever 11 is attached to the lower surface of the upper cover 3 (the upper surface in the opened state of FIG. 6), and the pressing lever 11 is urged to the rising posture of the figure by the torsion coil spring 12 in FIG. When the upper cover 3 is closed, the pressing lever 11 comes into elastic contact with the upper surface of the refill container 21 to press the staple sheet in the refill container 21.

After the upper cover 3 is opened, as shown in FIG. The upper hinge portion 23 is elastically deformed, and the knob portion 22 rotates around the hinge portion 23 as a fulcrum, and the lock plate 24 that is integrated with the knob portion 22 and located at the lower end of the back surface of the refill container 21 is forward (FIG. 8 To the left). As a result, the engagement between the convex portion 13 formed at the lower end of the rear wall of the base frame 2 of the staple cartridge 1 and the hole 25 of the lock plate 24 is released, and the rear portion of the refill container 21 is lifted to refill the container 21. Can be pulled out diagonally upward. When a new unused refill container is inserted into the staple cartridge 1 and the upper cover 3 is closed, staple replenishment is completed.
Japanese Unexamined Patent Publication No. Hei 9-93044 Japanese Patent Laid-Open No. 11-99505 Japanese Patent Laid-Open No. 11-235679 JP 2004-237446 A JP 2006-116637 A

  Conventional refill container replaceable staple cartridges require two operations, upper cover opening operation and unlocking of the refill container, until the refill container is taken out, and those without knowledge of the operation procedure are confused. There is also. In addition, there is a problem in that a pressing plate and a pressing arm are provided on the openable upper cover, and the housing structure is complicated and expensive. In addition, the pressing arm that is constantly pressed against the staple sheet may be creep-deformed by a load over a long period of time and the pressing function may deteriorate.

  Therefore, there is a technical problem to be solved in order to provide a staple cartridge that has a simpler structure, is smaller and lighter, can be easily replaced, and has no risk of deformation or functional deterioration of the staple pressing member. The present invention aims to solve the above problems.

  The present invention is proposed to achieve the above object, and is a staple cartridge used for an electric stapler, which is used by loading a refill container in which a plurality of linear staples bonded in parallel is stacked and accommodated. In the refill container replacement type staple cartridge, the base frame that accommodates the refill container has a box shape in which the upper surface and the rear surface are open and the refill container can be replaced through the rear opening, and the rear portion of the base frame The presser lever is hinged to the head, and the presser lever is a portal member made up of a top plate part and left and right side plate parts, and the tip of the presser lever is urged toward the inner bottom surface of the staple cartridge by a spring. By loading the refill container Provided is a staple cartridge in which the side plate portion of the lever is elastically pressed against the upper surface of the staple sheet in the refill container or the upper surface of the top plate placed on the staple sheet to press the staple sheet. To do.

  In the refill container used for the staple cartridge, a top plate is placed on a staple sheet accommodated therein, and guide pins provided on both side surfaces of the top plate are exposed to the outside through vertical grooves on the side surface of the refill container. A staple cartridge is provided which protrudes and the side plate portion of the pressing lever elastically contacts the guide pin of the top plate to press the staple sheet.

  Further, the side shape of the pressing lever is to provide a staple cartridge having a fan shape centered on a rotation fulcrum.

  The present invention also provides a staple cartridge in which an opening is formed on the side surface of the base frame, and the refill container can be attached and detached by grasping the side surface of the refill container with a finger through the opening.

  In the staple cartridge of the present invention, when the refill container is inserted from the opening on the back side of the base frame, the refill container is set in the base frame, and the pressing lever in the base frame presses the staple sheet in the refill container, The container replacement operation is extremely easy because it requires only one operation and does not require the conventional cover opening / closing operation.

  In addition, since it has a simple structure that does not include an openable cover or the like, it can be reduced in size and weight and cost can be reduced. In addition, since the holding lever has a portal section made up of a top plate portion and left and right side plate portions, the strength is higher than that of a conventional plate arm, and there is almost no risk of creep deformation and functional deterioration of the holding member. .

  In the refill container exchange type staple cartridge, the base frame that accommodates the refill container has a box shape in which the top surface and the back surface are open and the refill container can be replaced through the back surface opening. A portal-shaped pressing lever composed of a top plate portion and left and right side plate portions is hinged to the rear portion of the base frame, and the tip of the pressing lever is urged toward the inner bottom surface of the staple cartridge by a spring. With the above configuration, when the refill container is loaded from the back side of the staple cartridge, the side plate of the holding lever is elastically contacted with the top surface of the refill container, and the staple sheet is pressed, and a simple structure that does not require a cover opening / closing operation etc. The objective of the present invention is to provide a staple cartridge that is small and lightweight, that is easy to replace the refill container, and that is free from creep deformation and functional deterioration of the pressing member.

  FIG. 1 shows a staple cartridge 31, and the staple cartridge 31 includes a base frame 32 and a pressing lever 33. The base frame 32 is a box-shaped member having an upper surface and a rear surface (right side in FIG. 1) opened, and an opening 34 formed in a part of the left and right side surfaces, and forward from the box-shaped portion in which the refill container is accommodated. A nose portion 35 having a low height protrudes, and a handle portion 36 that rises upward is provided at the rear end. A bearing hole 37 is formed in the upper rear end of both the left and right sides of the base frame 32, and the pressing lever 33 is supported by a pin 38 inserted into the bearing hole 37.

  FIG. 2 shows the pressing lever 33, which is a channel-shaped member having a shape in which left and right side plate portions 39 each having a sector shape are connected by a top plate portion 40. Bearing holes 41 penetrating to the left and right are formed in the rear end portions of the left and right side plate portions 39. By inserting the pins 38 by matching the bearing holes 37 of the base frame 32 and the bearing holes 41 of the holding lever 33. The holding lever 33 is rotatably supported with respect to the base frame 32.

  When inserting the pin 38, the pin 38 is passed through the torsion coil spring 42 between the left and right side plate portions 39 of the holding lever 33, one end of the torsion coil spring 42 is hooked on the upper surface of the holding lever 33, and the other end is the base. By elastically contacting the handle portion 36 of the frame 32, the pressing lever 33 is urged in a direction in which its tip moves downward.

  In FIG. 3, 51 is a refill container. The refill container 51 is a box-shaped container having an open upper surface, and a large number of flat staple sheets S are stacked, and a top plate 52 is placed on the upper surface of the staple sheets S. Vertical grooves 53 are formed on the left and right side surfaces of the refill container 51, and horizontal guide pins 54 formed on the left and right side surfaces of the holding plate 52 protrude outward from the grooves 53 of the refill container 21.

  The distance between the inner surfaces of the left and right side plate portions 39 of the pressing lever 33 provided in the staple cartridge 31 is slightly wider than the lateral width of the refill container 51, and the refill container 51 enters the staple cartridge 31 through the opening on the back surface of the staple cartridge 31. Since the guide pins 54 of the top plate 52 are in contact with the lower surfaces of the left and right side plate portions 39 of the pressing lever 33, and the lower surface of the side plate portion 39 is an inclined surface that is lowered forward in the initial state, the refill container 51 is inserted. Accordingly, the holding lever 33 is pushed upward with the pin 38 as a fulcrum.

  FIG. 4 shows a state in which the refill container 51 is loaded in the staple cartridge 31, and the top plate 52 of the refill container 51 is pushed downward by the pressing lever 33. When an electric stapler (not shown) loaded with the staple cartridge 31 is operated, the staple sheet S in the refill container 51 is fed toward the front end of the base frame 32 by the staple feeding claw of the electric stapler, and the forming plate of the electric stapler And the driver pass up and down in the vicinity of the front end of the nose portion 35 of the base frame 32, and staple forming and ejection are performed.

  As the staple is ejected by the electric stapler and the staple sheet is consumed, the pressing lever 33 of the staple cartridge 31 and the top plate 52 of the refill container 51 are lowered. When replacing the refill container 51 by using up the staple sheet S in the refill container 51, hold the refill container 51 with a finger through the openings 34 on the left and right side surfaces of the staple cartridge 31, pull the rear part up slightly, and pull it backward. The refill container 51 is detached from the base frame 32 of the staple cartridge 31, and the refill container 51 can be taken out from the staple cartridge 31 with one operation.

  The locking mechanism of the refill container 51 with respect to the staple cartridge 31 is a fitting mechanism using a claw and a recess utilizing the flexibility of the refill container 51 and the staple cartridge 31 which are plastic parts, or FIG. 8 shown as a conventional example. As described above, any of a lock mechanism including the hole 25 of the lock plate 24 provided in the refill container 21 and the convex portion 13 on the cartridge 1 side may be used, and is not particularly limited.

  The present invention is not limited to the above-described embodiment, and various modifications are possible within the technical scope of the present invention, and it is natural that the present invention extends to those modifications.

The side view of the staple cartridge which shows one Embodiment of this invention. The perspective view of the holding lever of a staple cartridge. The side view of a staple cartridge and a refill container. The side view of the staple cartridge with which the refill container was loaded. The perspective view of a staple cartridge which shows a prior art example. The perspective view which shows a prior art example and shows the upper cover open state of a staple cartridge. The side view of a refill container. Sectional drawing which shows the locking mechanism of a refill container.

Explanation of symbols

31 Staple cartridge
32 Base frame
33 Holding lever
34 opening
35 Nose
36 Handle
38 pins
39 Side plate
40 Top plate
42 Torsion coil spring
51 Refill container
52 Top plate
53 Groove
54 Guide pin

Claims (4)

In a staple cartridge for use in an electric stapler, a refill container replaceable staple cartridge that is loaded and used with a refill container in which a plurality of linear sheets bonded in parallel is stacked and stored.
The base frame that accommodates the refill container has a box shape in which the upper surface and the rear surface are open and the refill container can be exchanged through the rear opening. The lever is a portal-shaped member composed of a top plate portion and left and right side plate portions. The lever is urged by a spring toward the inner bottom surface of the staple cartridge, and the refill container is loaded into the staple cartridge. A staple cartridge, wherein a side plate portion of a holding lever is configured to elastically contact a top surface of a staple sheet in a refill container or a top plate placed on the staple sheet to press the staple sheet.   In the refill container used for the staple cartridge, a top plate is placed on a staple sheet accommodated therein, and guide pins provided on both sides of the top plate protrude outward through vertical grooves in the side surface of the refill container. The staple cartridge according to claim 1, wherein the side plate portion of the pressing lever elastically contacts the guide pin of the top plate to press the staple sheet.   The staple cartridge according to claim 1, wherein a side shape of the pressing lever is a fan shape centered on a rotation fulcrum. The staple cartridge according to claim 1, wherein an opening is formed on a side surface of the base frame, and the refill container can be attached and detached by grasping a side surface of the refill container with a finger through the opening.

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