JPH0650146Y2 - Magazine fixed electric stapler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a magazine-fixed electric stapler that ejects staples from a magazine fixedly arranged on a base by driving a driver to bind sheets and the like. Regarding

[Prior Art] Conventional electric staplers of this type have hitherto been disclosed, for example, in Japanese Examined Patent Publication No. 63.
-44512 and Japanese Patent Laid-Open No. 62-236684 are known.

These electric staplers have a clincher provided at the front end of the base, a fixed magazine having a staple ejection opening corresponding to this clincher, and a vertically movable staple ejecting staple from the ejection opening toward the clincher. It is composed of a driver and a driver operating device.

The driver operating device includes a spring that biases the driver downward, and a driver operating member that is driven by a motor to rotate via a reduction gear group. The rotation of the actuating member drives the driver directly or via a hammer in response to the release of the bias of the spring when the sheets are bound, so as to eject the staples. On the other hand, in the standby state, the driver is held in the upper inoperative position against the biasing force of the spring, and the biasing force is accumulated in the spring in this state.

[Problems to be Solved by the Invention] By the way, in the above-described conventional electric stapler, since the driver is vertically lowered by the urging force of the spring, its drive system is arranged immediately above the driver. It will be.

Therefore, in terms of the mechanism, the height of the front part of the mechanism is forced to be large, which reduces the degree of freedom in selection in the layout design of each mechanism, and makes it easy to reduce the overall size. I couldn't do it.

Further, since the reduction gear group and the motor for transmitting the rotational force to the driver operating member are arranged on the left or right side of the stapler in the front-rear direction, the left-right direction or the width of the gear group and the motor. The occupying space in the direction becomes large, the width dimension becomes large, and in combination with the above-mentioned dimensional height of the front side portion, there is a problem that the overall size of the stapler cannot be avoided. Furthermore, since the driver actuating member has a drive system such as a gear group on the side, it is likely to receive an eccentric load, and in order to eliminate this, it is necessary to increase the shaft diameter or add parts, etc. A big increase in manufacturing costs was also inevitable.

The present invention has been made in view of the above-mentioned problems in the conventional structure, and an object thereof is not to concentrate the drive transmission system of the driver on the front portion of the stapler, and to widen the width direction of the stapler. The layout design of the internal mechanism part is easy, the overall size can be reduced, and sufficient operating force can be applied to the driver.
It is to provide a fixed magazine electric stapler that can be manufactured at low cost.

[Means for Solving the Problems] In order to solve the above conventional problems, the present invention provides:
Basically, it is fixed to the clincher provided at the front end portion of the upper surface of the base so that it cannot move up and down along the longitudinal direction of the base, and is opposed to the upper surface of the base with a predetermined interval. And a driver capable of moving up and down to eject staples from the staple ejection opening at the front end of the magazine, the rear end portion of the driver operating member supporting the driver at the front end portion An electric motor, a reduction gear group connected to the motor and having a horizontal rotation surface, respectively, rotatably supported on the rear end of the base at an upper position of the magazine, and operatively connected to the gear group. Cam means and a slider whose rear end is operatively connected to the cam means so as to reciprocate along the front-rear direction of the magazine in a substantially horizontal plane in response to the rotation of the cam means. It on the base And a support mechanism, a toggle mechanism is provided so as to convert the displacement of reciprocating movement of the slider in the horizontal plane into the vertical displacement of the driver, and one end of the first link member constituting the toggle mechanism is fixed to the fixed node. And the one end of the second link member is pivotally supported on the substantially intermediate portion of the driver actuating member via the second support shaft forming the movable joint. The present invention proposes a magazine-fixed electric stapler characterized in that the second link member is operatively connected to the front end portion of the slide through an engaging member having a long hole.

Further, in the above configuration, for example, the cam means is connected to the reduction gear group and engages with a groove cam member having a horizontal rotation surface and a groove of the groove cam member to project at the rear end of the slider. A concrete structure is proposed by using the provided stud member.

[Operation] In the magazine-fixed electric stapler according to the present invention having the above-described configuration, the main parts of the drive system for operating the driver, such as the reduction gear group and the electric motor, are arranged above the fixed magazine, and the stapler Not only can the height of the front part be lowered, since the height is reduced as much as possible by concentrating it in the approximately central part in the front-rear direction and making the operating surfaces of the reduction gears etc. horizontal. As a result, the overall size is reduced, and as a result, the degree of freedom in layout design is greatly increased, the structure is simplified, and the cost is easily reduced. Further, since the motor driving force transmitted via the reduction gear group is transmitted to the substantially intermediate portion of the driver operating member via the toggle mechanism, the force of the toggle mechanism provides a strong force to the driver. Since various driving forces can be transmitted, the motor can be miniaturized and labor can be saved.

[Embodiment] An electric stapler according to an embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a substantially rectangular plate-shaped base forming a main body frame. A left end (front end) 1a in FIG. 1 is formed on the upper surface of the base 1 along the longitudinal direction so that the left end (front end) 1a is one step lower than the other parts, and forms a space for inserting the binding sheets. The front end portion 1a has a staple bending groove 2a.
The clincher metal fitting 2 which has a clincher and is fitted in a state of being flush with the upper surface of the base.

3 is a fixed magazine for supplying staples 4,
It extends in the front-rear direction (horizontal direction in FIG. 1) in parallel with the upper surface of the base 1, and is arranged and fixed on the base 1. The front end of this magazine 3 (the left end in FIG. 1)
The staple ejection port 5 is opened downwards,
The staple bending groove 2a is arranged so as to face the staple bending groove 2a at a predetermined interval. And this launching opening 5 and the base 1
The spelled paper inserting portion 6 is formed between the front end portion 1a and the front end portion 1a.

Reference numeral 7 denotes a motor drive limit switch, which is arranged below the front end 1a of the base 1 as shown in FIG.
7a faces the inside of the spelled paper insertion portion 6.

Reference numeral 8 denotes a staple delivery tool that presses and holds the staples 4 arranged in a row in the magazine 3 toward the staple ejection port 5 by a spring bias.

As shown in FIG. 2, a magazine guide member 9 is arranged so as to cover the magazine 3 from above, and guides the magazine 3 slidably in the front-rear direction or the longitudinal direction. The guide member 9 is fixed to the base 1 with screws, so that the magazine 3 is integrated with the base 1 and cannot move up and down to form a part of the base.

Reference numeral 11 denotes a magazine lock release button rotatably supported at the rear end portion (right end portion in FIG. 1) of the guide member 9, and normally holds the magazine 3 in the storage position shown in FIG. When the user holds the magazine 3 and pulls out the magazine 3 for loading the staples, the lock is released by pressing the button 11.

Reference numeral 12 denotes a driver actuating member, which is a pair of side walls 12a and 12a arranged so as to face each other along both sides of the magazine guide groove of the magazine guide member 9 and both side walls at its front end portion (left end portion in FIG. 1). The connecting portion 12b is formed by connecting the upper portions of 12a and 12a, and the driver 10 is integrated with the connecting portion 12b.
Is bent. The driver actuating member 12 has side walls 12a, 12a at the rear end (the right end in FIG. 1).
Magazine guide member 9 through shaft holes 12c and 12C formed in 12a
It is rotatably supported by a support shaft 13 provided at the rear end portion.
The support shaft 13 is slidably guided by the magazine guide member 9 in an elongated hole 14 formed in the vertical direction. Bearing rings 15, 15 are fixed to both ends of the shaft 13, and
It is placed on the upper surface of the magazine guide member 9 forming a part of the. The bearing ring 15 is made of an elastically deformable material such as urethane rubber and serves to prevent overload of the electric motor as will be described later.

Reference numeral 16 denotes a casing which is erected in a fixed state at a substantially central portion of the base 1, and is formed in a U shape along both sides of the magazine guide member 9. The fixing to the base 1 is performed by the flange portions on both sides of the casing 16. This casing 16
Further, a motor mounting casing 17 is integrally fixed to the upper side of the. A slider guide plate 21 extending in the horizontal direction is fitted and fixed to the casing 16, and the inside of the casing 16 is vertically divided into two parts by the guide plate 21.

In this way, the casings 16 and 17 and the slider guide plate 21
Is fixed to the base 1 together with the magazine guide member 9 and constitutes a part of the base.

The slider guide plate 21 described above extends in the front-rear direction above and parallel to the magazine guide member 9. As shown in FIG. 2, the guide plate 21 has a slider guide groove 22 formed by bending on the upper side in the front-rear direction or the longitudinal direction by press working. Then, in the guide groove 22, the slider
23 is slidably fitted in the front-rear direction, and a guide hole 24 is formed along the front-rear direction in the guide groove 22.
A guide 25 projecting from this is engaged slidably with respect to this. Further, adjacent to this, a guide hole 26 is formed in the rear region in the center and along the front-rear direction, and the guide groove 22
A large-diameter base portion 27a of the cam shaft 27 protrudingly engaged with the cam shaft 27 is slidably engaged with the large-diameter base portion 27a. Further, a cam stud member 28 that engages with a grooved cam member 31 described later is projected at the rear end of the upper surface of the slider 23, and elongated holes 29a, 29a are formed on both sides of the front end along the vertical direction. The engaging members 29, 29 are provided so as to project upward.

31 is a grooved cam member, and the large diameter spur gear 32 is on the upper surface side.
Are provided integrally. The groove cam member 31 is the cam shaft 27.
It is rotatably supported by. Also, the groove cam member 31
As shown in FIG. 3, on the rear surface side of the, the continuous and irregularly shaped cam grooves which are asymmetric with respect to the moving direction XX of the slider 23 are formed.
33 is formed, and the radial line P that minimizes the distance between the rotation center of the grooved cam member 31 and the cam groove 33 and the radial line Q that maximizes the distance are 180 ° in the direction opposite to the rotational direction of the grooved cam member 31. An angle exceeding, for example, an angle of 250 ° is formed, and the rotation start position of the radial line P is on the XX line. That is, when the groove cam member 31 is rotated by 250 ° in the rotation direction, the radius line Q comes to be on the XX line. The cam stud member 28 is slidably engaged in the groove 33, and when the groove cam member 31 makes one full rotation in the clockwise direction shown by the arrow in FIG.
23 is a radial line P of the groove cam member 31 as shown by a chain line in the drawing.
Moves backward from the rotation start position by 250 °,
While returning from the rotation angle position to the original position, it takes a long time for the forward process so as to return to the front, that is, as shown by the arrow along the moving direction XX, and It is designed to make a short one-way slide movement. Due to the length of the required time, the ejection of the staples can be reliably performed over time, and thereafter, the drive system can quickly return to the original state.
Further, the groove cam member 31 has a notch 34 in a part of its circumference, and is provided at a position corresponding to the operating piece 35a of the motor stop limit switch 35 provided on the side wall of the casing 16 as shown in FIG. When the notch 34 comes in, the motor stops. As a result, the groove cam member 31 is automatically stopped after each rotation, and the stapler performs one binding operation during this period.

A motor 36 is placed at the center of the front end on the upper surface of the motor mounting casing 17, and a motor shaft 36a thereof projects vertically downward toward the inside of the casing 16. A small gear 37 is connected to the motor shaft 36a. The casing 16 includes a first spur gear and gears 40, 41 that are integrally provided with gears 38, 39 vertically.
Similarly, second spur gears each integrally provided with are integrally rotatably supported by spindles that are suspended and fixed to the upper wall of the casing 16, and the first spur gears are the spur gear 37 and the second spur gear. The second spur gear meshes with the large-diameter spur gear 32.

The small gear 37 of the motor shaft 36a, the first and second spur gears,
The large-diameter spur gears 32 sequentially mesh with each other as described above to form the reduction gear group 42, reduce the rotation of the electric motor 36, and transmit the decelerated rotation to the groove cam member 31. Each of these gears has a horizontal surface of rotation in a state of being stacked in parallel with the groove cam member 31.

Reference numeral 51 denotes a toggle mechanism, one end of which is a pair of first link members 52 pivotally supported by a fixed casing 16 via a support shaft 52a.
A second end whose one end is linked to the other end of the first link member 52 via a support shaft 57 and the other end is pivotally supported at a substantially central portion of the driver operating member 12 via a support shaft 53a. The intermediate support shaft 57 is connected to the engaging member 29 of the slider 23 in a manner so as to be slidably movable in the vertical hole 29a. A mode in which the first and second link members 52 and 53 form a pair is as shown in FIG.

Therefore, in response to the sliding movement of the slider 23 along the horizontal plane, the link mechanism 51 receives its moving force via the support shaft 57, the mutual bending angles of both link members 52, 53 are displaced, and the fixed joint With respect to the support shaft 52a forming the, the support shaft 53a forming the movable joint receives the transmission force doubled by the boosting action of the link mechanism,
As a result, the driver actuating member 12 is rotated around the support shaft 13 and the driver 10 is moved up and down.

Reference numeral 54 denotes a bottom cover, which covers the lower side of the base 1 and has a battery 55 for driving the motor 36 built therein. Further, on the upper side of the base 1, a main body cover 56 having a substantially triangular shape when viewed from the side is provided.
The upper part 56a of the cover serves as a grip part because the upper part 56a of the cover has a middle-height shape and is easy to hold.
A drive train including 36 is provided.

According to the electric stapler of the embodiment described above, the binding operation of sheets is performed as follows.

That is, as shown in FIG. 1, the binding sheet 61 is inserted into the binding sheet insertion portion 6, and when the insertion end of the binding sheet 61 presses the operating piece 7a of the limit switch 7, the motor 36 is started to rotate. The rotation of the motor 36 is reduced by the reduction gear group 42 and transmitted to the grooved cam member 31. Thereby, the groove cam member 31
Rotates clockwise from the original position shown in FIG. 3, and the slider 23 causes the cam stud member 28 and the cam groove 33 to rotate in accordance with this rotation.
Sliding backwards in relation to. When the rotation of the groove cam member 31 is started, the cutout portion 34 causes the operating piece 35 of the limit switch 35 to move.
When deviated from the position corresponding to a, the actuating piece 35a engages with the outer peripheral edge of the grooved cam member 31, and thereafter is pressed and held until the end of one rotation of the cam member 31, whereby the micro switch 7
Even if the operating piece 7a is opened, the rotation of the cam member 31 is continued. Depending on the rotation of the groove cam member 31,
Since the mutual angles of the first and second link members 52 and 53 of the link mechanism 51 are opened from the state shown in FIG. 1 and the support shaft 53a is pushed downward, the driver actuating member 12 of the support shaft 13 is moved downward. Around it, it turns counterclockwise in FIG. 1 and the driver 10 at the tip descends. As shown by the chain line in FIG. 3, the groove cam member 31 rotates further, and it takes a long time until the rotation angle reaches 250 degrees, and the slider 23 moves to the stroke end on the rightmost side. Is in the most stretched state as shown in Fig. 4, and the driver
10 ejects the staples 4, and the binding operation of the binding sheets 61 is performed.

After the binding operation is completed, the groove cam member 31 continues to rotate until the rotation is completed, so that the slider 23 slides in the returning direction, and the toggle mechanism 51 accordingly returns to the state of FIG. 1 in a short time. Then (fast return), the driver 10 moves up.
When the rotation of the grooved cam member 31 approaches one rotation, the notch portion 34 comes again to the operating portion of the operating piece 35a of the motor stop limit switch 35, and the pressing of the operating piece 35a is released, so that the limit switch 35 moves. The operation stops the motor 36, and one cycle of the binding operation is completed.

In the binding operation, when the driver 10 ejects the staples 4, the staple 4 cannot penetrate the binding sheet 61 because the binding sheet 61 is too thick, and the descending operation of the driver 10 is restricted. The forced driving force applied from the mechanism 51 to the driver operating member 12 is the bearing ring that supports the support shaft 13.
It is absorbed by the elastic deformation of 15. That is, in this case, the bearing ring 15 is elastically deformed to move the support shaft 13 downward in the elongated hole 14 and allow it to escape, so that the toggle mechanism 51 itself is not constrained. Therefore, even if the lowering operation of the driver 10 is hindered, it does not affect the drive system, so that the risk of damage to each member of the drive system or seizure itself can be prevented.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

[Effect of the Invention] As described above, according to the magazine fixed type electric stapler of the present invention, the drive system portion for operating the driver is concentrated above the fixed magazine in the substantially central portion thereof, and the reduction gear group is provided. Since the cam means, the slider, etc. are operated in a horizontal plane, the lateral width and height can be made as small as possible, the overall miniaturization design and the layout design of the internal mechanism are easy, and the cost is also reduced. Further, the motor driving force transmitted through the reduction gear group, the cam means, and the slider is transmitted to the substantially intermediate portion of the driver operating member via the toggle mechanism to give a displacement, and the tip of the operating member is provided. Since the driver is driven by the section, a strong driving force can be transmitted to the driver by the boosting action of the toggle mechanism, and accordingly It provides various effects such as sufficient pull-out force, size reduction of the motor, and labor saving.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a magazine-fixed electric stapler according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of main internal components of the electric stapler shown in FIG. 1, and FIG. 3 is a groove. A in FIG. 1 showing an operational relationship between the cam member and the slider.
FIG. 4 is a cross-sectional view taken along the line A, and FIG. 4 is an operation explanatory diagram of a main part showing a driver operating state when binding a sheet. DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Clincher metal fittings 3 ... Magazine, 4 ... Staples 5 ... Staple ejection port 10 ... Driver, 12 ... Driver operating member 23 ... Slider, 28 ... Cam stud member 31 ... Groove cam member, 33 ... Cam groove 36 ... Electric motor, 42 ... Reduction gear group 51 ... Toggle mechanism

Claims (2)

[Scope of utility model registration request] 1. A clincher provided at a front end portion of an upper surface of a base, fixed movably up and down along the longitudinal direction of the base, and arranged to face the upper surface of the base at a predetermined interval. A stapler including a magazine and a driver that can move up and down to eject staples from the staple ejection opening at the front end of the magazine, the rear end portion of the driver operating member that supports the driver at the front end portion of the base. An electric motor, a reduction gear group connected to the motor and each having a horizontal rotation surface, and a cam operatively connected to the gear group, which is rotatably supported by a rear end portion and is located above the magazine. Means and a slider whose rear end is operatively connected to the cam means so as to reciprocate along the longitudinal direction of the magazine in a substantially horizontal plane in response to rotation of the cam means. To that A toggle mechanism for supporting and converting the displacement of reciprocating movement of the slider in the horizontal plane into the vertical displacement of the driver is provided, and one end of the first link member constituting the toggle mechanism forms a fixed node. One of the first and second links is pivotally supported by the first support shaft, and one end of the second link member is pivotally supported by the second support shaft forming the movable joint to a substantially middle portion of the driver operating member. A magazine-fixed electric stapler, wherein the member is operatively connected to the front end of the slider through an engaging member having a long hole. 2. A grooved cam member, wherein said cam means is connected to said reduction gear group and has a horizontal rotating surface, and a stud engaged with a groove of said grooved cam member and projecting from a rear end of said slider. The fixed magazine type electric stapler according to claim 1, comprising a member.