JPS5845026Y2 - Operation monitoring device for stapler - Google Patents

Description

[Detailed Description of the Invention] The purpose of the present invention is to detect whether or not the stapler is performing normal paper binding operation.

In manually operated staplers, it is possible to sense when a staple runs out, and it is immediately visible that the stapler is not being stapled, so there is no need to install an operation monitoring device. No, but for example,
Automatic staplers, which are built into a copying machine and are used to automatically stitch together a predetermined number of copies in conjunction with the copying operation, do not have staples. Sometimes, the stapler bends without penetrating the paper and the paper is not stapled, which causes the trouble of having to manually staple the paper again. There is.

The present invention automatically detects the abnormality of the above-mentioned operating condition and allows countermeasures to be taken while the number of defective products is low. , it is characterized in that it detects that the staples that are constantly driven are electrically connected between them, thereby detecting that they are in a normal operating state.

Next, prior to explaining the present invention, an example of an automatic stapler will be explained.

Reference numeral 1 denotes a force lever, which is mounted on the frame 2 and is pivotally supported by a shaft 4 on a bracket 3, and is engaged with a long hole 6 provided in an arm 5 extending in a T shape from the main body. The electromagnetic pusher 7 rotates counterclockwise in the figure.

A fixed rail 8 is pivotally supported by a shaft 10 on a bracket 9 provided on the frame 2, and is urged clockwise by a leaf spring 11 having one end fixed to the frame 2.

The fixed rail 8 is formed into a cylindrical shape with a rectangular cross section having an opening in the soil surface, and as shown in FIGS. 5 and 6, a movable rail 12 having a U-shape in one plane is slidably housed therein.

A guide rail 13 having a U-shaped cross section is fixed to the moving rail 12, and the moving rail 12 and the guide rail 13 are fixed to each other.
A gap is formed between the respective sidewalls.

The user is mounted astride the guide rail 13 while inserting both legs into the gap between the staples 14.

The distal end of the moving rail 12 is closed by a claw plate 15, and the bottom thereof is open.

A needle pushing piece 16 having a U-shaped cross section is slidably provided within the moving rail 12 as shown in FIG.
Can slide across 3.

The needle pusher piece 16 has a protrusion 17 on its upper surface, which abuts against a stopper 18 provided at the tip of the fixed rail 8, thereby preventing further movement.

Since the moving rail 12 is also provided with a stopper 19 at its rear end, it cannot be pulled out beyond the state shown in FIG.

A V-shaped notch 20 is provided at the rear end of the moving rail 12 (see FIGS. 2 to 4).

A stopper 21 whose tip is engaged with this notch 20 is pivotally supported by Mlo of the bracket 9.

The stopper 21 is urged to rotate clockwise by the spring 22, and the notch 20V? C engage.

Then, the movable rail 1 is pushed into the fixed rail 8.
2 is pushed back by a leaf spring 23 provided at the rear end of the fixed rail 8, and the push back force is received by the stopper 21, so that it is fixed in the state shown in FIGS. 2-4.

A claw holding lever 24 is further pivotally supported on the shaft 10 of the bracket 9.

A claw 25 is attached to the tip of the claw holding lever 24.

This claw 25 is rotated by the rotation W of the claw holding lever 24.
The binding needle 14 in the moving rail 12 descends while being guided by the
The most advanced one is pressed down toward the template 28 provided on the frame 2.

The rotation of the pawl holding lever 24 is performed by pushing a pin 26 fixed to the pressure lever 1.

Hey, there's the one-claw holding lever 24 and the plate 27 that fixes it to it.
It is always urged clockwise by the reaction force caused by pressing the free end of the pin against the fixed rail 8, and is always in contact with the pin 26.

The stapler 14 housed in the movable rail 12 is pressed toward the claw guide plate 15 by the needle pusher piece 16, but the needle pusher piece 16
The biasing force is applied by a spring 29 whose one end is locked to the pressure lever 1.

The other end of the spring 29 is connected to a pin 3 fixed to the pressure lever 1.
It is connected to the needle pusher piece 16 by a flexible band 32 that reaches the needle pusher piece 16 via a pin 31 fixed to the needle holding lever 24.

Next, the operation of the stapler will be explained.

First, rotate the stopper 21 against the spring 22 to remove it from the V-shaped notch 20 of the moving rail 12.
When the distal end of the moving rail 12 is pinched and pulled out, the stapler can be loaded as shown in FIG.

Therefore, the binding staple 14 is loaded so as to straddle the guide rail 13, and then the moving rail 12 is pushed in.

The moving rail 12 slides within the fixed rail 8, pushes up the stopper 21, and then its rear end presses against the leaf spring 23.

During the pushing operation of the moving rail 12, the rear end of the stapler 14 comes into contact with the needle pushing piece 16, causing it to retreat together with the moving rail 12 while stretching the spring 29.

Therefore, the movable rail 12 is moved by the urging force of the spring 29 and the pushing force of the leaf spring 23 as shown in FIG.
- and is pushed back to the left, but the stopper 21 engages with the ■-shaped notch 20, so it is held in the state shown in FIG.

After the preparations are completed as described above, when the copy paper 33 to be bound is set on the template 28, the electromagnetic plunger 7 is
The power is bribed.

The electromagnetic plunger 7 rotates the arm 5 counterclockwise,
The pressure lever 1 is rotated around the shaft 4 as shown in FIG.

As a result, the pawl holding lever 24 is pressed by the pin 26 and rotates about the shaft 10, and the rotational force is transmitted to the fixed rail 8 via the leaf spring 27, so that the fixed lever 8 is moved by the leaf spring 11. It rotates in the same direction as the pawl holding lever 24 against the biasing force.

The claw guide plate 15 protruding from the tip of the fixed rail 8 that has been rotated as described above is attached to the copy paper 33 on the template 28.
Pressed against.

As a result, the copy paper 33 is positioned on the template 28, and further rotation of the fixed rail 8 is stopped.

Since the rotation of the pressure bar 1 continues even after the fixed rail 8 is prevented from rotating, the claw holding lever 24 continues to rotate, and the claw 25 provided thereon holds the staple 14 in the movable rail 12 at its most. Press down on the tip.

As a result, only one of the leading edges of the binding needles 14 is attached to the template 28.
After the two legs pass through the copy paper 33, the copy paper 33 is bent according to the template 28, and the copy paper 33 is bound.

When the electromagnetic plunger 7 is deenergized, the leaf spring 11
．． The urging force of 27 causes each part to change from the state shown in Fig. 4 to the second state.
Return to the state shown in the figure.

At this time, the pawl 25 is also lifted from the tip of the sliding rail 12, so that after the pawl 25 has retreated, the binding needle 14 moves to the needle pusher piece 16.
When pressed, only the stitching needle-needle valve is fed out in preparation for the next stitching operation.

The above is the operation and operation of the stapler that implements the present invention, and the features of the present invention will be described below.

As shown in FIGS. 1 and 8, the template 28 is divided into two pieces 28a and 28b, each of which is made of metal.

Both pieces 28a and 28b are fixed to an insulating piece 28c.

A protrusion 28d provided at the center of the insulating piece 28c, both pieces 28a
, 28b, the buttons are perpendicular to mold grooves 28e and 28f, electrically dividing both pieces 28a and 28b.

Screws 33 and 34 passing through both pieces 28a and 28b-b and insulating piece 28c penetrate through frame 2 and are insulated by insulating bushings 35 and 36, and are tightened with nuts 37 and 38.

The screws 33 and 34 serve to fix the template 28 to the frame 2, and also connect both pieces 28a and 28b to the lead wire 39.
．． 40 serves to connect to a sensing circuit (not shown).

When the electromagnetic plunger I is biased and the pressure lever 1 is rotated counterclockwise, the binding needle 14 is struck, and as shown in FIG. 2
It hits both pieces a and b of 8.

Then, with the subsequent 7JD pressure, the tip of the binding needle 14 becomes
Mold grooves 28e, 28fK: Therefore, they are bent inward to complete paper binding.

At this time, the two pieces 28a and 28b are electrically connected by the stapler 14, so that the detection circuit becomes a closed circuit, and it is reported that the stapler has been properly stapled.

When the binding staple 14 runs out or runs out and becomes empty, both pieces 28a are removed.

28b is not connected by the stapler 14, so the detection circuit does not become a closed circuit.

Therefore, by knowing that the detection circuit does not issue a notification at the normal timing, it is possible to know that the operation is not normal.

The same applies if the staple 14 does not penetrate the copy paper 41 even if the staple is struck.

As described above, the present invention is capable of detecting that the two-part template is electrically connected by the stapled staples, thereby detecting that the paper binding operation is normal. Therefore, the operational status of the stapler can be monitored, and the occurrence of defective items such as empty pages can be detected at an early stage.

[Brief explanation of drawings]

1 to 4 are side views of the automatic stapler,
FIG. 5 is a cross-sectional view taken along the line v--■ in FIG. 2, and FIG. 6 is a cross-sectional view taken along the line VI--VI in FIG. FIG. 7 is a perspective view of the template, and FIG. 8 is a sectional view taken along the line -■ in FIG. 7. 14... Staple, 28... Template, 28a, 28b.
... Divided piece constituting the template, 28c... Insulating piece, 33
．． 34... Screw, 39, 40... Lead wire.

Claims (1)

[Scope of utility model registration request] The template, which is located below the staple pressed by the needle pressing piece and bends inward both ends of the staple that has penetrated the binding paper, is divided into electrically insulated and conductive parts, and each piece is An operation monitoring device for a stapler, in which both tips of the stapler are brought into pressure contact with each other, and each piece is connected to a detection circuit to detect the state of electrical continuity between each piece.