JPH067894Y2 - Stapler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a stapler that facilitates engagement of a pusher with a magazine and facilitates loading of staples for convenient handling.

(Prior Art) Conventionally, in a stapler including a pusher in a magazine for accommodating a staple in a magazine in which a groove for nail ejection is formed at a front end and sequentially supplying the staple in a forward direction,
Since the pusher is biased by the spring, when the staple is loaded, it is necessary to move the pusher backward of the magazine against the spring force.

In order to reduce the troublesome loading operation of the staples, there is known a mechanism for automatically moving the pusher backward by opening the pressing rod connected to the rear end of the magazine. There is. This is achieved by pivotally supporting one end of the link rod on the pushing rod and engaging the other end of the link rod with the pusher, and rotating the pushing rod so as to open it to the magazine. Then, the link rod is rotated so as to rise and the pusher is automatically moved backward.

Usually, a protrusion is formed on both sides of the other end of the link rod, and the protrusion is engaged with a guide groove formed in the magazine. And, the above-mentioned guide groove is the actual opening of Sho 51-74.
As disclosed in Japanese Patent No. 875, it is opened on the rear end side, and the other end of the link rod is configured to be inserted from the open portion.

However, in the case of the above configuration, when the other end of the link rod is inserted into the guide groove, the link rod is retracted to the rear end position of the magazine against the spring force of the pusher, and the assembling work is performed while maintaining this state. It is necessary to twist the link rod in order to insert the other end of the link rod further in front of the forward position of the pusher. Therefore, there is a manufacturing problem that automatic assembly is difficult to adopt. Furthermore, since the guide groove for guiding the end of the link rod is formed on the side wall of the magazine, it must be formed considerably higher than the height of the stapling needle for accommodating the height of the side wall of the magazine. There was also the drawback that it was difficult to load the needle.

(Purpose of Invention) The present invention has been made to solve the above-mentioned problems.
The link rod can be easily and reliably assembled to the magazine without the need for complicated operations such as backward movement and twisting of the pusher assembled in the magazine, and the height of the side wall of the magazine is low. You can easily load the staples,
The purpose is to provide a stapler with excellent handleability.

(Means for Achieving the Purpose) In order to achieve the above-mentioned object, the stapler according to the present invention is
A magazine provided with a pusher for pressing the binding needle accommodated in the needle ejection groove formed at the front end portion, and a pressing operation rod provided with a driver for pushing out the leading binding needle in the magazine from the nail ejection groove. A base member formed with a clincher that engages with the tip of the binding needle driven from the nail driving groove and bends the binding needle in a predetermined direction, and one end of which is slidably supported by the pressing rod and In a stapler provided with a link rod having an end formed with an engaging portion that engages with the pusher, both sides of the other end of the link rod are guided and guided along upper end surfaces of both side walls of the magazine, while Forms an engaging protrusion that engages with the engaging portion of the link rod, and the rear end surface of the engaging protrusion is passed over the engaging protrusion when the other end of the link rod moves forward. Inclination invitation that makes it possible to move forward Characterized in that the formation of the surface.

The other end of the link rod may be spring-biased in the direction of abutting the upper end faces of both side walls of the magazine, and the other end of the link rod may be advanced to the both side walls on the front end side of the magazine. A restricting portion that restricts upward swinging at the position may be provided.

According to the above configuration, when the link rod is assembled, the other end of the link rod whose one end is supported by the pushing operation rod is engaged with the pusher of the magazine when the link rod is assembled. Guide the end forward along the upper end surface of the side wall of the magazine. When the engaging portion formed on the other end side is urged by the spring and gets over the inclined guide surface of the pusher at the front end position, the engaging portion may be engaged with the engaging protrusion of the pusher. In this way, the link rod can be assembled by a simple motion, so the work is very easy. Therefore, when assembling the link rod, it is not necessary to move the pusher backwards against the spring or to give the link rod a complicated operation such as twisting. The cost associated with assembly can be reduced.

Furthermore, since it is not necessary to form a guide groove for guiding the link rod on the side wall of the magazine, the height of the side wall of the magazine can be made low, and thus the staple can be easily loaded and handled easily. Is.

The other end of the link rod can be prevented from moving so as to be disengaged from the pusher by biasing the other end of the link rod toward the upper end surfaces of both side walls of the magazine. it can.

Further, by providing a regulating portion on both side walls on the front end side of the magazine for regulating the other end of the link rod from swinging upward in its forward position, when the pressing rod is opened. The link rod is prevented from swinging upward due to contact friction with the pressing operation rod, and stable operation can always be performed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 is a magazine, which is formed in an elongated box shape for accommodating the binding needle 2, has a needle ejection groove 3 at the front end, and has a front portion and a rear portion. Bearing portions 4 and 4 formed by cutting and raising are provided in and at which a guide shaft 6 having a spring 5 mounted thereon is supported, and the guide shaft 6 supports a spring 5 and a pusher 7.

The pusher 7 is slidable along the guide shaft 6, and is urged by the spring 5 so as to constantly press the binding needle 2 in the direction to supply the staple ejection groove 3 to the pusher 7. As shown in FIG. Projecting pieces 8 for pressing the binding needle 2 are formed at the front end of the, the engaging projection 9 is formed at the upper end surface of the rear part, and a hole 11 is formed in the lower part so as to be loosely inserted into the guide shaft 6. Further, an inclined guide surface 10 is formed on the rear end surface of the engaging projection 9 so as to move over the engaging projection 9 and move forward of the projection 9 when the other end of the link rod described later moves forward. ing.

The heights of both side walls a and b forming the magazine 1 are substantially the same as the length of the needle leg of the binding needle 2 and the height of the projecting pieces 8 of the pusher 7, and the engagement of the pusher 7 is performed. The projection 9 is configured to project upward from the both side walls a and b. By lowering the height of the side walls a and b, the loading of the binding needle 2 becomes extremely easy.

Next, in the magazine 1, the pressing operation rod 1 is provided with a driver 12 for pushing out the needle at the tip of the binding needle 2 accommodated in the magazine 1 from the needle ejection groove 3.
3 are provided correspondingly, and both are pivotally supported on the coaxial 19 at the rear end thereof so as to be swingable. The pressing rod 13 includes a main body 14 made of a synthetic resin, and a metal driver 12 installed in the main body 14 and having a tip bent in a hook shape.
4 and a staple cover 13a provided inside. The front end of the staple cover 13a is supported by a vertically elongated hole 15 formed in the driver 12, the rear end of the staple cover 13a is engaged with the support shaft 19, and a leaf spring 16 is interposed between the main body 14 and the staple cover 13a. It is equipped.
As a result, the staple cover 13a is always urged to separate from the main body 14.

The pressing rod 13 is not necessarily the staple cover 13.
a is not required, and in this case, the link rod 24
May be pivotally supported on the main body 14.

The pressing rod 13 and the magazine 1 are each supported by a support shaft 19 at the rear end of the base member 18. The base member 18 is formed by providing a clincher arm unit 22 on the front upper surface of a base substrate 20, and at the front of the clincher arm unit 22, the tip of the binding needle 2 ejected from the needle ejection groove 3 of the magazine 1. And a clincher 21 for bending the needle leg in a predetermined direction. Further, a return spring 23 is arranged at the rear of the clincher arm unit 22, and the tip of the return spring 23 is pressed against the abdomen of the magazine 1. Therefore, the magazine 1 is always urged to separate from the base material 20.

Reference numeral 24 is a link rod. As shown in FIG. 5, the link rod 24 has protruding shafts 25, 25 formed at one end thereof and bearing holes (not shown) formed on both side walls of the staple cover 13a.
It is swingably supported by bearings on the.
At the other end of the link rod 24, an abutting portion 26 which is guided and guided in contact with upper end surfaces a ′ and b ′ of both side walls a and b of the magazine 1.
26 and an engaging portion 27 that opens from the corresponding contact portions 26, 26 and locks the hole end with the engaging protrusion 9 of the pusher 7. Further, the link rod 24 has a contact portion 2
6, 26 are upper end surfaces a ′ of both side walls a and b of the magazine 1,
One end of the staple cover 13 for press contact with b '.
The other end of the tension spring 28 stopped to a is stopped and the spring is urged downward. The tension spring 28 is attached to the link rod so that the staple cover 13a is not disengaged from the magazine 1 by the spring urging force when the staple cover 13a is closed with respect to the magazine. It is arranged so that the power is almost zero.

Next, restriction portions 29, 29 are provided on the front end sides of both side walls a, b of the magazine 1. The restricting portions 29, 29 are notch grooves for restricting upward swing of the link rod 24 at the forward position, and are upper end surfaces a ′, b ′ of the side walls a, b.
When the spring load on the link rod of the spring 28 is 0 at the beginning of the operation of dissociating the magazine and the pushing operation rod at the time of loading a staple, etc. The contact portions 26, 26 are locked.
This prevents the link rod 24 from separating from the pusher 7 and swinging upward together with the staple cover 13a due to contact friction between the staple cover 13a and the front end of the link rod 24 when the pressing rod 13 is opened. To be done.

According to the above configuration, when the link rod 24 is assembled, when the other end of the link rod 24, one end of which is supported by the pressing rod, is engaged with the pusher 7 of the magazine 1, the other end of the link rod 24 is engaged. The upper end surfaces a ′ of the side walls a and b of the magazine 1,
Guide the vehicle forward along b '. The engaging portion 27 formed on the other end side may be urged by the spring 5 to pass over the inclined guide surface 10 of the pusher 7 at the front end position and then be engaged with the engaging protrusion 9 of the pusher 7. In this way, since the link rod 24 can be assembled by a simple motion,
The work is very easy. Therefore, when assembling the link rod 24, it is not necessary to move the pusher 7 backwards against the spring or to give the link rod 24 a complicated operation such as twisting, which enables automation of these assembling. The cost associated with this automatic assembly can be reduced.

Further, since it is not necessary to form the guide groove on the side wall of the macajin 1, the height of the side wall of the magazine 1 can be reduced, and therefore, the binding needle can be easily loaded and the handling is easy.

By urging the other end of the link rod 24 in the direction of abutting the upper end surfaces a ′ and b ′ of the side walls a and b of the magazine 1, the other end of the link rod 24 and the pusher 7 are formed. Movement out of engagement can be prevented.

Further, the pressing operation rod 1 is provided by providing on both side walls on the front end side of the magazine 1 with a regulating portion for regulating the other end of the link rod 24 at the forward position to swing upward.
3 is opened, the engagement between the link rod 24 and the engaging portion of the pusher 77 is released by the contact friction between the staple cover 13a and the front end of the link rod 24, and the tank rod 24 is released.
Is prevented from swinging together with the staple cover 13a.

The pressing rod 13 is not necessarily the staple cover 13.
a is not required, and in this case, the link rod 24
May be pivotally supported on the main body 14.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a stapler according to the present invention, FIG. 2 is a sectional view showing the main structure of the stapler, FIG. 3 is a perspective view of a magazine 1, and FIG. 4 is a pusher 7. Perspective view, fifth
The figure is a perspective view of the link rod 24. Reference numeral 1 ... Magazine 1, 2 ... Binding needle, 3 ... Needle ejection groove, 7 ...
Pushers 7, 9 ... Engaging projections 10, 10 ... Inclination guide surface, 12 ...
Driver, 13 ... Pressing rod, 18 ... Base member, 21
... Clincher, 24 ... Link rods 24, a, b ... Left and right side walls, a ', b' ... Upper end surfaces of both side walls, 27 ... Engaging portion, 28
... Spring, 29 ... Regulator

Claims (3)

[Scope of utility model registration request] 1. A magazine provided with a pusher for pressing a binding needle accommodated in a needle ejection groove formed at a front end portion, and a driver for pushing a leading binding needle in the magazine from the needle ejection groove. And a base member having a clincher that engages with the tip of the binding needle driven from the nail drive groove and bends it in a predetermined direction, and one end is slidably supported on the pressure operating rod. And a stapler having a link rod formed with an engaging portion that engages with the pusher at the other end, and guides both sides of the other end of the link rod along the upper end surfaces of both side walls of the magazine. On the other hand, the pusher is formed with an engaging projection that engages with an engaging portion of the link rod, and the engaging projection has a rear end surface that engages when the other end of the link rod moves forward. Can move past the projection and move to the front of the projection Stapler, characterized in that the formation of the inclined guide surface to. 2. The stapler according to claim 1, wherein the other end of the link rod is spring-biased in a direction in which the other end of the link rod abuts upper end surfaces of both side walls of the magazine. 3. A restricting portion is provided on both side walls on the front end side of the magazine to restrict the other end of the link rod from swinging upward at its forward position.
The stapler according to (1) or (2).