JPH0616664Y2 - Stapler clincher mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a clincher mechanism for a stapler having movable staples.

(Prior art and its problems) Generally, a large stapler for binding thick paper to be bound,
For the stapler of the type that bends the staple legs linearly along the back side of the paper to be bound on the back side of the paper to be bound,
In many cases, a clincher mechanism is adopted that bends the legs of the staple after the staple has penetrated the paper to be bound.

The clincher mechanism has two clincher mechanisms that face each other so as to correspond to the legs on both sides of the staple that penetrates the paper to be bound.
It is composed of a pair of clincher members rotatably supported in a clincher holder formed by one wall, and a cam member provided so as to be movable relative to the clincher holder.

According to the clincher mechanism, as shown in FIG. 6, the clincher member 50 is in a hung state along the ejection direction of the staple A before the bending operation of the staple A, and the staple A is not covered. The relative movement of the cam member 51 and the clincher holder 52 when penetrating the binding paper P causes the clincher member 50 to be substantially parallel to the back surface of the binding paper P due to the pressing force at the time of contact by the cam member 51. It rotates and bends the legs of the staples. In this way, before the bending operation of the staple A,
That is, since the clincher member 50 is in a hung state until the ejection of staples is completed, a gap S is formed between both clincher members 50. Therefore, for example, the staples or the foreign matter A ′ that have been blank-launched may enter the gap S. In this case, smooth rotation operation of the clincher member is hindered, which may cause inconvenience such as spelling failure and damage to parts.

(Object of the Invention) The present invention solves the above-mentioned drawbacks and provides a stapler clincher mechanism capable of preventing staples and foreign matter from entering the inside of the clincher mechanism and always operating the clincher mechanism smoothly and reliably. Is its purpose.

(Means for Achieving the Purpose) In order to achieve the above object, a clincher mechanism for a stapler according to the present invention is a base member provided with a pair of clincher members for bending a leg portion of a staple along a back surface of a sheet to be bound. A frame member that accommodates the staples and is rotatably supported by the base member; and that the frame member can rotate integrally with the base member and relatively An operating handle member for rotating and ejecting staples in the frame member by the driver member, and rotating each of the clincher members in the clincher holder so as to correspond to the legs of the staples ejected by the driver member. The clincher holder can be moved relative to the back side of the clincher member while supporting it as much as possible. In the stapler for bending the leg portion of the staple which penetrates the sheet to be bound and engages with the clincher member by rotating the cam member by bringing the cam member into contact with the pair of clincher members during relative movement, It is characterized in that the pair of clincher members are always spring-biased to the position where the bending operation of the staple leg is completed.

(Operation and Effect of Invention) According to the above configuration, in the stapling operation of the paper to be bound, after the staple ejected from the frame member penetrates the paper to be bound by the rotation of the operation handle member and the frame member,
The relative movement of the clincher holder and the cam member causes the rotated clincher member to bend and spell.

By the way, since the clincher member is always urged by the spring to the position at which the bending operation of the staple leg is completed, after the stapling work, the clincher member is held by the spring so as to close the opening end of the clincher holder, and There is no gap formed in. Therefore, even if the blanking is performed, it is possible to prevent the staple and the foreign matter from entering the inside of the clincher mechanism, and the clincher mechanism can always be operated smoothly and reliably.

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

FIG. 1 shows a desk-shaped stapler equipped with a paper guide device of the present invention, in which 1 is a base member composed of a substrate 2 and a cover 3, and 4 is a base member 1 rotatable by a support shaft 5. A frame member that is supported by and constitutes a magazine holder,
Reference numeral 6 denotes a magazine unit mounted on the frame member 4 and loaded with the staple A, and 7 denotes an operation handle member constituting a handle unit rotatably supported by the frame member 4 by a support shaft 8.

Between the base member 1 and the frame member 4, and between the frame member 4 and the operation handle member 7, return springs 9 and 10 each made of a compression coil spring are respectively inserted.
The respective members 4 and 7 are held in the illustrated raised position.

The staple A pulls out the magazine unit 6 to the front of the frame member 4 (to the right in the drawing) by operating the magazine locking lever 12 formed at the rear end of the frame member 4, and moves it into the front portion of the magazine unit 6. Is loaded. Ejection outlet for staples from staple A 1
3 and the driver 14 for sequentially ejecting are the frame member 4
Driven by relative rotation of both members 4, 7 via a driver holder 15 provided between the operating handle member 7 and the operating handle member 7. The structure itself of the driver holder 15 and the magazine unit 6 is the same as a known structure, and therefore detailed description thereof is omitted.

Reference numeral 16 denotes a clincher mechanism for bending and forming the leg portion of the staple along the back surface of the paper to be bound, and is arranged on the base member 1 corresponding to the ejection port 13.

The clincher mechanism 16 is rotatable by a clincher holder 18 movably provided in a fixed guide 17 on the base plate 2 of the base member 1 and a pivot pin 47 (see FIG. 3) described later in the clincher holder 18. The clincher member 20 is supported by a pair of clincher members 20, and a cam member 21 provided on the back side of the clincher member 20. The clincher holder 18 is elastically biased by a leaf spring 19 toward a position (projection position) shown by a solid line in FIG.
Is configured to move relative to.

Next, in the clincher mechanism, the cam member 21
As shown in FIG. 4 (a), the clincher member 20 is always pushed up by the spring 34 of the base member 1 so that the clincher member 20 closes the opening end of the clincher holder 18 (position after completion of staple bending operation). Is spring-loaded.

Reference numeral 23 is a slider, which is slidably arranged in the base member 1 in the front-rear direction of the base member, and a front end portion 23a thereof is normally in a projecting position.
It is in the operative position shown in FIG. 1 which engages the lower end of 8 to prevent the clincher holder 18 from descending. A base end portion of the slider 23 is operatively connected to the operation handle member 7 via an operation link mechanism 24, and a coil spring 25 is provided.
Is constantly urged toward the operating position.

The operation link mechanism 24 is fixed to the operation handle member 7 and is engaged with the driver holder 15 to drive the driver holder 15. The link plate 26 is connected to the lower end of the link plate 26 through a connecting portion formed by a pin and a long hole. Together with the lever 2 pivotally supported at an intermediate portion on a support shaft 27 on the frame member 4.
8, a lever 31 connected to the lever via a link 29 and pivotally supported by a support shaft 30 on the base member 1 at an intermediate portion. The lever 31 is connected to the slider 23 via a connecting portion including a pin 32 protruding from the lever 31 and an elongated hole 33 formed in the slider 23.

That is, in the operation link mechanism 24, the operation handle member 7 reaches the position shown by the chain double-dashed line in FIG. 1 together with the frame member 4, and the ejection opening 13 reaches the lower clincher mechanism 16 via the bound paper P to be bound. At the timing until the leg portion of the staple A that has come into contact with the punched-out staple A penetrates the bound paper P to be bound, the slider 23 is not moved from the operating position where it is engaged with the clincher holder 18, and the penetration of the leg portion is completed. When the bending is started, the slider 23 is slid from the operating position to the releasing position against the spring 25 in the direction of disengagement from the engagement with the clincher holder 18, as shown by the arrow in FIG. .

A clincher holder 18 is provided around the clincher mechanism 16.
A plate-shaped paper guide member 35 for connecting the upper end portion of the base member 1 and the front portion 1a of the base member 1 is arranged to form a guide surface for the paper P to be bound in place of the flat upper surface 1b of the base member 1. There is.

In the above-described configuration, when the binding paper P is placed on the clincher holder 18 and the operation handle member 7 is rotated when the binding work of the binding paper P is performed, the operation handle member 7 is indicated by a two-dot chain line in FIG. Up to the rotation position shown in FIG. 1, the spring 10 rotates substantially integrally with the frame member 4 against the spring 9, and then, when the staple A is ejected, the spring 10 is moved relative to the frame member 4 contacting the clincher holder 18. The staple A is ejected from the ejection port 13 by rotating in the opposite direction. The ejected staple A penetrates the paper to be bound P on the clincher holder 18, engages with the upper surface of the clincher member 20 of the clincher mechanism 16, and pushes down the clincher member 20 in the ejection direction against the spring 34. At this time, the cam member 21 also descends (see FIG. 4 (b)). Almost at the same time, the peripheral edge of the ejection port 13 of the frame member 4 contacts the clincher holder 18, and pushes this against the clincher holder 18. As a result, the cam member 21 relatively rises and abuts against the clincher member 20 and pushes it up, so that the clincher member 20 rotates upward due to the pressing force, and the leg portion of the staple A is bent by the rotational force. Clincher member 20
Finally rotates to a position where it is substantially parallel to the back surface of the paper P to be bound, so that the legs of the staple A are also bent substantially flat (see FIG. 7C).

Next, after the stapling operation, the clincher holder 18 is at the upper position due to the elasticity of the leaf springs 19, and the cam member 21 always pushes up the clincher member 20 by the spring 34 so that the clincher member 20 has completed the staple bending operation. Biased to be in position. As a result, the clincher member 20 remains in the clincher holder 18 even after the binding operation is completed.
The opening end of the clincher member 20 is held in a closed state, and no gap is formed between the clincher members 20. Therefore, even if the blank is hit, the staples and the foreign matters are prevented from entering the inside of the clincher mechanism 16 well.
The clincher mechanism can always be operated smoothly and reliably.

It should be noted that the clincher member 20 may have a configuration in which the clincher member 20 is always biased to the position when the bending operation of the staple leg is completed, and for example, as shown in FIG.
From both sides of the torsion coil spring 42 fixed to the pin 41 at the center of the side surface through the elongated hole 40 formed in the side surface of
The end portion 42a may be engaged with the lower surface of the clincher member 20 to bias them to the position at the time of completion of the staple bending operation.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a stapler having a clincher mechanism according to the present invention, and FIG. 2 is an operation explanatory view corresponding to FIG.
FIG. 3 is an exploded perspective view of the stapler of FIG. 1, and FIG.
(a) (b) (c) is an explanatory view of an operation mode of the clincher mechanism, FIG. 5 is a perspective view of another example of the clincher mechanism, and FIG. 6 is a front view of a main part of a conventional clincher mechanism. is there. Reference numeral A ... Staple, P ... Staple sheet, 1 ... Base member, 4 ... Frame member, 7 ... Operation handle member, 14 ... Driver member, 18 ... Clincher holder, 20 ... Clincher member, 21 ... Cam member, 34
……Spring

Claims (1)

[Scope of utility model registration request] 1. A base member provided with a pair of clincher members for bending leg portions of staples along the back surface of a sheet to be bound, and a staple member that is rotatably supported with respect to the base member. A frame member and an operation handle member capable of rotating integrally with the base member with respect to the base member, and rotating relative to the frame member to eject staples in the frame member by a driver member. While rotatably supporting each of the clincher members in the clincher holder so as to correspond to the leg portions of the staple ejected by the driver member, and cams on the back side of the clincher member to be relatively movable with the clincher holder. A member is provided, and the cam member is brought into contact with the pair of clincher members during relative movement to rotate. In a stapler that folds the leg portion of the staple that is engaged with the clincher member by penetrating the paper to be stapled, the pair of clincher members is always spring-biased to the position when the bending operation of the staple leg is completed. The clincher mechanism of the stapler that is characterized.