JPH01130902A - Stapler device - Google Patents

Abstract

PURPOSE: To enable detection of the presence or absence of a binding wire in a stable manner free from a false operation by disposing a wire detecting means at a position opposite to the portion of the binding wire where light reflectance is high. CONSTITUTION: At the base part 6b of a body 6 facing a wire cartridge 23, a reflection type wire detecting sensor 32 detecting the presence or absence of stapler wires 22 electrically is so disposed as to be opposed to the end part (t) of each of the stapler wires 22. In more detail, the stapler wires 22 held in the wire cartridge 23 are bonded at the respective central parts by a bonding agent and connected in the shape of a belt and the sphere 1 wherein they are bonded by the bonding agent shows a yellowish color. At the position opposite to the end part (t) of each of the stapler wires 22 sent sequentially to a wire bending block 20, the wire detecting sensor 32 receives a strong reflected light from the end part (t) where reflectance is high, and detects the presence or absence of the stapler wires 22 at a high S-N ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) 'Industrial Application Field The present invention relates to a stapler device for binding sheets with staples, and more particularly relates to a staple detecting means for detecting the staples of the stapler device. .

([1) Prior Art Conventionally, an electric stapler apparatus is equipped with a staple storage section such as a staple cartridge that stores a large number of staples.As a method for detecting the presence or absence of staples stored in the staple storage section, There are methods that use the conductivity of the stapler to detect when the stapler is driven in, and methods that use the reflection of light from the stapler to optically detect.

(c) Problems to be Solved by the Invention However, the above-mentioned stapler that utilizes the conductivity of the stapler has a complicated structure and inevitably increases costs. Also,
Optical detection using light reflection is relatively inexpensive and easy to implement, but stable detection is difficult due to the specificity of the stapler being detected. That is, the stapler needles in the staple cartridge are usually stored in a connected state in the form of a band, and each needle is glued together near the center with adhesive, and the glued area covers the entire length of the needle. The color has changed to a different color from the ground color. For this reason, the light reflected from the stapler when the stapler detection sensor detects the stapler is weak, which may lead to malfunction.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a structure that receives a large difference in light depending on whether a staple detection sensor or stapler is present and when there is no staple, thereby solving the above-mentioned problems.

(d) Means for solving the problem The present invention has been made in view of the above circumstances, and
Referring to the figure, there is a needle accommodating part (23) that can accommodate the stapler (22) for binding the sheets (S), and whether or not the stapler (22) is present in the staple accommodating part (23). The stitching needle (22
needle detection means (32) that detects by receiving light reflected from )
In the stapler device (1), the stapler detecting means (32) is arranged at a position facing a portion (t') of the stapler (22) having a high light reflectance. This is a characteristic feature.

(f) Function Based on the above-described configuration, the needle detection means (32) detects the stitching needles (2).
The binding needle (22) receives the strong reflected light from the highly reflective area (1) of 2), and the stitching needle (22)
Detects the presence or absence of.

Note that the above symbols are shown for reference and do not limit the configuration in any way.

(F) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIGS. 2 and 3, the stapler device 1 includes:
The stapler apparatus 1 includes a base 2 that supports the entire stapler apparatus 1, and an upper unit 5 and a body 6 that are swingably supported on the base 2 via a hinge shaft 3. A lower jaw 7 having an anvil 4 at one end is rotatably supported on the base 2 via a fulcrum pin 7a, and a cam-shaped groove 7b is formed at the other end of the lower jaw 7. , the caulking shaft 5a of the upper unit 5 engages with the several members 7b, and rotates about the fulcrum pin 7a as the upper unit 5 swings. Further, a crank arm 9 is arranged from the base 2 to the upper unit 5, and the crank arm 9 is rotatably supported by the base 2 via one end thereof or an arm shaft 11, and the crank arm 9 has a circular shape. The other end 9a is rotatably fitted to a support shaft 10 supported by the upper unit 5 via an eccentric ring.

Further, a motor 12 that can rotate in both forward and reverse directions of the drive source of the device I is arranged at the top of the upper unit 5,
A motor gear 13 is fixed to the output shaft 12a of the motor 12, and the motor gear 13 is fixed to one end of the support shaft 10.
A stapler gear 15 that meshes with the motor 12 is fixedly installed, and the support shaft 10 is connected to the motor 12 via the motor gear 13 and the stapler gear 15. When the motor 12 rotates, the support shaft 10 rotates, the eccentric wheel rotates eccentrically, and the upper unit 5 is pulled or pushed by the crank arm 9 and swings about the hinge shaft 3 as a fulcrum. .

Further, a driver 16 is disposed above the body 6, and has a head portion 16a at the top and a plate-shaped plunger 16b at the bottom. The driver pin 16c is fitted into the upper frame 5b of the upper unit 5, contacts the head portion 16a or the upper frame of the upper frame 5b, and passes through the upper part of the driver 16. It is supported by the lower frame and is moved up and down by the swinging of the upper unit 5 so as to push or pull up the plunger 16b fitted into the body 6.

Further, as shown in detail in FIG. 4, the body 6 is provided with a needle cutting member 17 having an opening 17a at the plunger insertion position of the driver 16, and adjacent to the needle cutting member 17. A needle feeding member 19 having an elastic portion 19a and a needle feeding pawl 19b at its lower portion is disposed, and the needle feeding member 19 is movable about a fulcrum 19c. Also, a stapler' is provided at a position facing the opening 17a of the needle cutting member 17! A needle block 20 having a holding groove 20a for holding the needle block 20 is arranged so as to be movable from side to side.
The needle cutting member 17 is urged by a spring 21 . Further, adjacent to the needle feeding member 19, a staple cartridge 23 that accommodates a large number of stapler needles 22 connected in a band shape is removably arranged.
3 is a leaf spring-like needle lever 25 that presses down the stapler needle 22.
are fixedly installed, and the stapler needles 22 and 22 are connected in a band-like manner.
・Hold with appropriate pressure. Further, a U-shaped bending block 26 is arranged adjacent to the plunger 16b, and when the plunger 16b moves downward, the block 26 is pushed down by a predetermined amount by the pushing pawl 16d of the plunger 16b. When the plunger 16b moves upward, the protrusion of the block 26 engages with a long hole of a predetermined length provided in the plunger 16b, for example, and is pulled upward.

The pushing pawl 16d is designed to be removed from the U-shaped bending block 26 by pushing the block 26 by a predetermined amount.

The U-shaped bending block 26 is provided with a protrusion 26a, and when the block 26 is pushed down as described above, the protrusion 26a presses the needle feeding member 19, causing the needle feeding member 19 is distorted as shown by the chain line,
Move the needle feed claw 19b in the opposite direction to the needle feed direction,
Also, when block 26 is raised and the suppression is lifted,
The needle feeding member 19 returns to its original position under the action of the elastic portion 19a, and at this time either the needle feeding claw 19b or the stapler needle 22 is fed.

Further, as shown in FIGS. 2 and 3, a sensor cam 27 having one protrusion 27a on the outer periphery is fixed to the other end of the support shaft 10, and a sensor cam 27 is fixed to the other end of the upper unit 5. A microswitch 29 is disposed opposite the sensor cam 27, and when the stapler gear 15 rotates once due to the rotational drive of the motor 12, it is detected that the sensor cam 27 rotating in synchronization with the stapler gear 15 rotates once. It is detected whether the plunger 16b of the driver 16 has completed one stroke in which it is pushed from the upper limit standby position to the binding position, then pulled up from the binding position and returned to the standby position.

When the motor 12 rotates and the upper unit 5 is pulled by the crank arm 9 and moves downward using the hinge shaft 3 as a fulcrum to press the head portion 16a of the driver 16, the drive bar 16 is pushed and moved downward. Then, it is further pushed by the body 6 or the driver 16 and moves in the X direction using the hinge shaft 3 as a fulcrum, and at the same time as the driver 16 moves downward, the lower jaw 7
moves in the Y direction using the fulcrum pin 7a as a fulcrum, and the body 6
and the lower jaw 7 is the binding position where the sheet S is bound.
Face each other with the two sides in between.

On the other hand, the stapler needles 2 stored in the staple cartridge 23
2 is the needle cutting member 1 using the needle feeding claw 19b of the needle feeding member 19.
7 through the opening 17a to the needle bending block 20, and the most advanced needle 22a or the central part
When the driver 16 is pressed down and its plunger 16b is pressed down,
The U-shaped bending block 26 pushed by the pushing claw 16d presses and bends both ends of the stapler needle 22 held by the needle bending block 20 into a U-shape (see FIG. 5(a)).

Furthermore, the plunger 16. B is pushed down, and the push claw 1
6d comes off from the U-shaped bending block 26 and plunger 16
The needle cutting member 17 cuts only the most advanced needle 22a bent into a U-shape without pushing the needle bending block 20 away.
The number 22a is sheared between the sheets S, and the number 22a is driven into the sheet S. The number 22a is further pressed against the anvil 4, and both ends of the number 22a are crushed into a flat plate shape to bind the sheet S. Then, the upper unit 5 moves upward, the driver 16 is pulled up, the plunger 16b moves upward and returns to the standby position, and the body 6 and lower jaw 7 move back to the standby position. When the sheet is moved, one process of binding and fixing the sheets is completed.

Note that one rotation of the stapler gear 15 completes one stroke.

Further, when the plunger 16b returns, the next stapler needle 22 is fed into the holding groove 20a of the needle bending block 20 in preparation for stapling the next sheet S.

On the other hand, as shown in FIG. 1, on the bottom 6b of the body 6 facing the staple cartridge 23, there is a reflective needle detection sensor 32 that electrically detects the presence or absence of the stapler needles 22.
The outer staple detection sensor 32 is arranged so as to face the end t of the stapler needles 22 (
(see (b)).

That is, the stapler needles 22... housed in the staple cartridge 23 are connected in a band shape by being glued together at their central portions, as shown in detail in FIG. Due to the influence of the adhesive, the color of the area l adhered by the stapler needle 22 changes from silver to a yellowish color.

Then, when the output voltage of the reflective type staple detection sensor 32 is examined, as shown in FIG. The output voltage VL when receiving the reflected light from the end t that maintains its color is lower than the output voltage VL' when receiving the reflected light from the area 1 bonded with adhesive, and when there is no needle. The difference with voltage VH is large. Therefore, the S-N ratio (signal-to-noise ratio) of silver with high reflectance is higher than that of yellow, and it is suitable for detecting the presence or absence of a needle, and there is a probability of false detection even when it is contaminated by foreign matter such as dust. or be held down small. In particular, the staple cartridge 23 is often covered with a plastic cover link, and considering the diffused reflection of the plastic part, the stapler sword 22 can only be detected by the silver-colored part, which is the base color of the number 22.

Therefore, the staple detection sensor 32 is arranged so as to face the end t of the stapler needle 22, which maintains the silver color as described above.

In addition, the stapler needles 22 connected in a band shape include:
As shown in FIG. 7, there are four parts 35 between the adjacent staples 22, and when the output voltage of the button detection sensor 32 at that time is examined, as shown in FIG. The waveform becomes wavy due to variations in the reflectance of light at 22.... Therefore, the stapler 22 can be adjusted only by the output voltage level.
When determining the presence or absence of ..., the rise in the output voltage of the four parts 35 may lead to a mistaken determination that there is no needle, so if the output voltage level reaches the predetermined level 71 or higher
When the condition is stable, it is determined that there is no needle.

Note that the reference numeral 33 in FIG. 1 is a board, and the reference numeral 36 is a connector.

In addition, as shown in FIG. 4, the needle detection sensor 32 is
The stapler needles 22... are arranged at a predetermined distance L# on the upstream side in the feeding direction from the tip of the needle feeding claw 19b, and when the staple detection sensor 32 detects the absence of a staple, the stapler needles 22... The stapler device 1 is electrically stopped after a predetermined time within the range in which the rear part of the stapler 25 is held down by the stapler lever 25, and the stapler 22...
・In addition to making the most effective use of the button cartridge 23
When replacing stapler needles 22, remaining stapler needles 22...
The needle cartridge 23 is removed together with the needle cartridge 23 while being held in the same state.

Here, the operation related to detecting the presence or absence of staples in this embodiment will be explained.

Stapler needles 22 stored in the Senshi cartridge 23...
- The needle bending block 20 is sequentially passed through the opening 17a of the needle cutting member 17 by the needle feeding claw 19b of the needle feeding member 19.
The sheet S is sent to the sheet S, and is pressed by the plunger 16b to staple the sheet S. Then, a needle detection sensor 32 is placed at a position opposite the ends of the stapler blades 22 . According to the ratio, the stapler needle 22...
If the rear end of the stapler 22 leaves the staple detection sensor 32, the staple detection sensor 32 detects the presence or absence of the stapler.
The stapler device 1 detects the absence of staples without malfunctioning, and the stapler device 1 is stopped after a predetermined period of time has elapsed since the detection.

(g) As described in detail, the present invention provides that the needle detection means is disposed at a position opposite to the part of the stitching needle that has a high light reflectance. The staples are detected with a high signal-to-noise ratio by receiving strong reflected light from the parts, and the staples are stable and do not malfunction even in the face of noise, ambient light, ambient temperature, aging, etc. Detects presence/absence.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the arrangement position of a staple detection sensor according to an embodiment of the present invention, FIG. 2 is a front view of a stapler device according to an embodiment of the present invention, FIG. 3 is a side view thereof, and FIG. 4 is a body FIG. 5 is a diagram showing the connected state of the stapler needles, FIG. 6 is a diagram showing the output voltage depending on the sensor position, FIG. 7 is a diagram showing the stapler detection state of the staple detection sensor, and FIG. 8 is a diagram showing the stapler needle detection state. FIG. 3 is a diagram showing the output level when determining the presence or absence of staples. DESCRIPTION OF SYMBOLS 1... Stapler device, 22... Staple (stapler needle), 32-... Needle detection means (needle detection sensor), t... Area with high light reflectance (high reflectance of light) edge) .

Claims (2)

[Claims] (1) A needle storage unit capable of storing a stapler for binding sheets; and a needle detection means for detecting the presence or absence of the stapler in the stapler housing unit by receiving light reflected from the stapler. What is claimed is: 1. A stapler device characterized in that the staple detecting means is disposed at a position facing a portion of the staple that has a high light reflectance. (2) The stapler device according to claim 1, wherein the portion is one end of the staple.