JPS62181882A - Cassette type stapler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to staplers that use cassettes preloaded with staples.

PRIOR ART AND ITS PROBLEMSCurrently, staplers of the type // are widely used. With either stapler, when you run out of staples,
New staples must be loaded. Staples are made up of a plurality of approximately U-shaped staples arranged in a row and easily connected to each other to form a single unit, which is then loaded into a stapler. At this time, it is well known that if the staples are not handled relatively carefully so as not to separate, they will fall apart and become very troublesome. Previously, we proposed a cassette-type stapler.In this proposal, a group of staples is inserted into a longitudinal hollow part of a cassette, a feeder is inserted, and the feeder is pushed forward by a coil spring to drive out the frontmost staples. The rear end of the spring engages the cap and is held in compression with the feeder.

At this time, in order to effectively utilize the elasticity of the coil spring without being distorted in the hollow part of the cassette, the coil spring is tilted in the longitudinal direction, and a rod member is provided on the cap or feeder.
A coil spring holds it in its normal position. This requires extra material and requires installation of the rod members.

Means for Solving the Problems The present invention aims to eliminate the need for extra manufacturing work and materials by utilizing the hollow wall of the cassette to hold the spring member in the cassette type stapler without using a rod member. shall be.

The present invention is a cassette-type stapler that includes a base, a frame rotatably attached to the base, and a handle whose rear end is rotatably attached to the frame,
In the cassette stapler, the frame can be loaded with a cassette loaded with staples,
The cassette has a hollow part in the force direction with a rectangular cross section of 1' length, and a group of staples, a feeder that engages the rear end, and a coil spring that engages the rear surface and the front end of the feeder are loaded in the hollow part, A cap is attached to the rear end of the cassette so as to close the rear end opening of the hollow portion, and this cap engages with the rear end of the spring to hold the spring in a compressed state between the feeder and the coil. To provide a cassette type stapler, characterized in that the outer periphery of the spring is in contact with the inner wall surface of the hollow part of the cassette at at least three places.

DESCRIPTION OF EMBODIMENTS Referring to FIG. 1, the stapler shown here has a base l.
, a frame 2 attached to the base as described later, and a handle 3 attached to the frame as described later. The base l has an elongated box shape, and there are partitions 4 inside for reinforcement. The inner surface of the tip 8 of the base l is provided with an anvil 7, which is well known in the art.

A recess 6 is provided approximately at the center rear of the base l for the purpose described later.

The frame 2 also serves as a cassette holder, as will be described later, and consists of an elongated plate-shaped front portion 2A and a rear portion 2B integrally connected to the front portion and having a box-shaped portion 18 extending downward. A spring piece 9 is provided on the first side of the frame 2 and projects obliquely forward, and this spring piece 9 cooperates with the handle 3 as will become clear later. An elastic protrusion 5 extends downward from the front surface of the box-shaped portion 18 of the rear portion 2B, and this protrusion 5 fits into the recess 6 of the base l described above.
Frame 2 rotates around that point. A hole 5A or r1 having a rectangular cross section is passed through the box-shaped portion 18 of the frame 2 in the longitudinal direction thereof, into which a cassette to be described later is inserted.

A resilient projection 12 extends upward from the rear end surface of the frame 2, and this will become clear later.

The handle 3 has an elongated box shape similar to the base l, and is provided with an actuating element 13 inside its front end, which when the front end of the handle 3 is pushed down, as is well known, One staple in the cassette loaded in the frame 2 is driven downward and pressed against the anvil 7 to staple the target object. A gap 11 is provided inside the rear end of the handle 3 to receive the protrusion 12 on the rear end of the frame 2, and the protrusion 12 of the frame 2 is inserted into this gap.
The handle 3 can be elastically rotated toward the frame 2 and the base l.

As best seen in FIG. 3, the cassette lO inserted into the hole 5A of the box-shaped portion 18 of the frame 2 has a rectangular cross section in the longitudinal direction (a square cross section in the illustrated embodiment) for receiving the staples T. This is an elongated box-shaped device having a hollow portion 10A, and is inserted into the hole 5A of the frame 2 from the rear as shown in FIG. Both sides of the cassette 10 are provided with projections 14 (only one shown) which are provided at corresponding positions on the side walls of the box-shaped part 18 of the frame 2 and engage with recesses 15. It is designed to hold the C cassette 10 in a predetermined position. In addition,
Of course, the protrusion may be provided on the frame side and the recess may be provided on the cassette side, or other types of holding stages may be used.

A group of staples t is first inserted into the cassette 10, and a feeder piece 20 is engaged with the rear end of the group of staples, and a coil spring 26 is attached behind the feeder piece 20.
are engaged at one end.

, the coil spring 26 elastically presses the feeder piece 20 forward so that it aligns with one of the staples t or with holes 23, 24 aligned with the top wall 21, bottom wall 22 of the cassette 10. ing. It will be clear to those skilled in the art that when the actuating element 13 of the handle 3 passes through these holes 23, 24, it separates its staple t from the group and at the same time engages the anvil 7 of the base l.

A cap 27 engages the rear end of the coil spring 26 and is secured to the rear end of the cassette 10.

The inner surface of the cap 27 is provided with a protrusion 27A that engages within the rear end of the coil spring 26, and a protrusion 34 is provided on the outer surface of the side wall opposite the protrusion. In this case, the protrusion 27A is provided to engage the coil spring 26.

It is sufficient that it is composed of at least two side walls. These protrusions 34 engage openings 35 in the side walls of the cassette IO when the cap 27 is attached to the rear end of the cassette 10 to secure the cap 27 on the cassette IO.

The feeder piece 20 and the cap 27 are formed into a square shape to match the hollow part 10A of the square cross section of the cassette IO, and the staple t is also formed into a U-shape with each side having equal length to match the shape of the hollow part. (See Figure 4).

As shown in FIG. 5, the coil spring 26 has a cylindrical shape, and its outer peripheral portion engages with the four inner wall surfaces of the square hollow portion 10A of the cassette, so that there is no guide rod. However, the coil spring 26 is not distorted or deformed, and is correctly held in a compressed state within the cassette hollow portion 10A. Incidentally, a small window 36 is provided on the side surface near the front end of the cassette 10 to confirm the presence or absence of staples. Preferably, cassette 10 is formed from a transparent plastic material, in which case window 36 would be unnecessary.

In the illustrated embodiment, if the cross section of the hollow part IOA of the cassette lO is square, or if at least three points on the outer periphery of the cylindrical coil spring engage with the inner wall surface of the hollow part of the cassette,
A similar effect can be achieved. Therefore, if this condition is met, the cassette hollow may have a rectangular cross section.

Effects of the Invention Thus, according to the present invention, in a stapler type stapler, a group of staples is guided only by the inner wall surface of the hollow portion of the cassette, which is a coil spring that presses the staple group forward in the cassette.
A guide means such as a separate guide rod is not required at all, which is very advantageous in terms of materials and work efficiency.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a stapler according to the present invention. FIG. 2 is a longitudinal sectional view of a stapler made by assembling the components shown in FIG. FIG. 3 is a longitudinal sectional view of the cassette used in FIG. 2. FIG. 4 is a cross-sectional view taken along line IT-IV in FIG. 3. FIG. 5 is a cross-sectional view taken along the line V--V in FIG. 3. In the drawings, l.axis base, 2.frame, 3.
...Handle, 5...Protrusion, 6...Indentation, 7...
・Anvil, 9... Spring, 10... Cassette, 11
...Gear...knob, 12...protrusion, 13...operating element, 14...protrusion, 15...hole, 20...feeder piece, 23.24...hole, 26 ...Spring, 27.
... Cap, 34 ... Protrusion, 35 ... Hole Attorney Kono ■1 Procedural amendment M (spontaneous) 1985 Patent Application No. 218362, Name of invention Cassette type stapler 3, Make amendment Relationship with the Patent Case The name of the patent applicant is amended to Etosu Co., Ltd.

Claims (1)

[Claims] A cassette-type stapler including a base, a frame rotatably attached to the base, and a handle having a rear end rotatably attached to the frame, the frame being capable of attaching a cassette loaded with staples. In the cassette type stapler, the cassette has a longitudinal hollow part with a rectangular cross section, and within this hollow part are a group of staples, a feeder that engages the rear end, and a coil that engages the rear surface and the front end of the feeder. A spring is loaded, a cap is attached to the rear end of the cassette so as to close the rear end opening of the hollow part, and this cap engages with the rear end of the spring to compress the spring between the feeder and the cassette. cassette-type stapler, wherein the outer periphery of the coil spring is in contact with the inner wall surface of the hollow part of the cassette at at least three locations.