JPH0214940Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application of the Invention) This invention relates to a staple forming mechanism in a staple driving device.

(Prior art and its problems) Recently, sheet-like staples, in which a large number of wire-like unformed staples are adhesively connected in a sheet-like manner, are formed into a U-shape in the main body of the device in order from the first one, and then are driven into the material to be bound. A staple driving device has been proposed that is equipped with a staple insertion mechanism.

As shown in FIGS. 5a, b, and c, such a staple forming mechanism fixes a concave forming mechanism 3, which is formed downward at the lower end of a forming plate 2 that is movable up and down, to the main body 1 of the apparatus. The unformed staple S supplied onto the anvil 4 is formed into a U-shape between the forming structure 3 and the anvil 4. Further, the staple driving mechanism is provided ahead of the forming mechanism, and includes a driving guide groove 7 that holds the formed staple Sa sent from the forming mechanism by a pressure feeding means (not shown), and a driving guide groove 7 that holds the formed staple Sa in the guide groove 7. It consists of a driver plate 8 that is driven into the material to be bound.

In the above-mentioned staple driving device, for example, the staple Sa formed into a U-shape on the anvil 4 may have its legs 13, 13 opened due to its inherent elasticity, resulting in an incomplete state. . When the legs 13, 13 are opened in this way, as shown in FIG. In some cases, the paper is not guided to the inside, and in this case, no printing is performed, resulting in blank printing, resulting in poor spelling.

In order to prevent such molding defects, conventionally it was necessary to precisely control dimensions such as the width of the anvil and the inside of the molding groove, which was technically extremely difficult. A solution was desired.

(Technical problem of the invention) This invention solves the above-mentioned drawbacks, and provides a staple driving device that can reliably guide the staple to the driving mechanism even if the shape of the staple formed by the forming mechanism is slightly defective. The technical challenge is to propose a forming mechanism.

(Structure of the invention) In order to achieve the above-mentioned problems, the staple forming mechanism in the staple driving device according to the present invention has a concave molding formed downward at the lower end of a molding plate provided on the main body of the device so as to be movable up and down. A formed staple is placed at the front of a staple forming mechanism that has a groove facing the convex part of an anvil fixed to the apparatus main body, and forms the unformed staple supported on the anvil into a U-shape between the forming mechanism and the convex part. In a staple driving device that is provided with a driving guide groove and drives the formed staple guided into the guide groove into the material to be stapled, the anvil has a convex portion on both sides of the convex portion, on the lower side thereof,
The present invention is characterized in that a guide slope for the staple leg is formed that slopes toward a molded staple driving guide groove provided in front of the anvil.

(Operations and effects of the invention) According to the above-mentioned configuration, since guiding slopes that slope toward the driving guide groove are formed at the lower portions of both sides of the convex portion of the anvil, when the forming plate is lowered, the unformed The staple in this state is formed into a U-shape between the forming groove of the forming plate and the convex portion of the anvil, and at the same time, the tips of the legs of the formed staple contact the guiding slope, and the staple is pressed against the slope. Along the anvil, the staple is forcibly guided into a molded staple driving guide groove provided in front of the anvil. For this reason, there is no room for the phenomenon that the staple leg opens after being formed. Therefore, reliable driving can be performed without precise dimensional control of the anvil width, molding grooves, etc. to prevent molding defects, and this has a very large practical effect.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

In the figure, reference numeral A indicates a main part of the staple driving device. This staple driving device A is equipped with a staple forming mechanism and a staple driving mechanism. It is constructed by arranging the groove 3 to face the convex portion 5 of an anvil 4 fixed to the main body 1 of the device. Further, the staple driving mechanism is composed of a staple driving guide groove 7 formed on the inner surface of the face plate 6 provided at the front side of the forming mechanism, and a driver plate 8 provided in the main body 1 of the apparatus so as to be movable up and down. There is.

The molding plate 2 and the driver plate 8 are supported by a plate holder 9, and the plate holder 9 is linked to a drive means (not shown). The plate holder 9 is configured to be driven in the vertical direction by this driving means. Note that the driver plate 8 and plate holder 9 are omitted in FIG. 1.

The face plate 6 is provided at the tip of the device main body 1, and a molded staple driving guide groove 7 is provided at the center of the inner surface of the face plate 6 at a position below the driver plate 8 and opposite to the front of the convex portion 5 of the anvil 4. It is formed.

Staple pushers 10 are provided on both sides of the convex portion 5 of the anvil 4 and are biased forward by a spring. Then, when the molding groove 3 of the molding plate 2 is lowered to fit into the convex part 5, a gap corresponding to one staple is formed between the convex part 5 and the molding groove 3. ing. A face plate 6 is provided at the bottom of both sides of the convex portion 5 of the anvil 4.
A guide slope 1 that slopes toward the driving guide groove 7 of
1 and 11 are formed. A transport means (not shown) is provided behind the anvil 4, and the plurality of sheet-shaped unformed staples S are transported onto the anvil 4 by the transport means.

Next, the operating mode of the staple driving device A having the above configuration will be explained. First, when the sheet-shaped unformed staple S is transferred onto the anvil 4, when the plate holder 9 is driven by the drive device, the forming plate 2 is driven. Descend onto the anvil 4 and form the leading staple Sa into a U-shape. at the same time,
The staple pusher 10 is formed by the forming plate 2.
is pushed back. After that, the plate holder 9
When the staple pusher 10 rises, the formed staple Sa is pushed out into the driving guide groove 7 of the face plate 6 by the spring force of the staple pusher 10.

By the way, since guiding inclined surfaces 11, 11 which are inclined toward the driving guide groove 7 of the face plate 6 are formed at the lower portions of both sides of the convex portion 5 of the anvil 4, when the forming plate 2 is lowered, the unformed state The staple S is formed into a U-shape between the forming groove 3 of the forming plate 2 and the convex portion 5 of the anvil 4, and at the same time, the legs 13 of the formed staple Sa,
The tips of the anvils 13 come into contact with the guiding slopes 11, 11, and are forcibly pushed out and guided along the slopes into the molded staple driving guide groove 7 provided in front of the anvil 4. Therefore, even if the forming plate 2 rises thereafter, the staple leg 1 has already been removed.
3 and 13 are guided by the driving guide groove 7, the phenomenon that the leg parts 13 and 13 open due to their inherent elasticity does not occur, and furthermore, the entire staple Sa is moved by the operation of the staple pusher 10. It is inserted into the driving guide groove 7 reliably.

After that, the formed staple in the driving guide groove 7 is
Sa is driven toward the workpiece by the driver plate 8 when the plate holder 9 descends.

In addition, at the bottom of both sides of the convex part 5 of the anvil 4,
As shown in the figure, the forward guiding slope 1 as described above.
1, 11 as well as the inward guiding slope 12,
12, even if the molding groove 3 and convex part 5 are pressed only from above with the molding plate 2,
Even if there is play of one staple or more in the gap between the legs 13 of the staple Sa, both ends of the staple Sa are guided inward by the inward guiding slopes 12, 12. , 13 is the convex portion 5
is pressed against both sides of the holder to form a predetermined U-shape. Therefore, the effect of preventing staple molding defects is further improved.

[Brief explanation of the drawing]

FIG. 1 is an enlarged explanatory view of the main parts of the staple forming mechanism in the staple driving device, FIG. 2 is a side view of the main parts of the staple driving device, FIG. 3 is an exploded perspective view of the main parts of the staple driving device, and FIG. 4 5 is a perspective view of another embodiment of the anvil of the staple forming mechanism, and FIGS. 5a, 5b, and 5c are explanatory views of the conventional forming mechanism and driving mechanism. Code A... Staple driving device, 1... Device body, 2... Forming plate, 3... Forming groove, 4...
... Anvil, 5 ... Convex portion, 6 ... Face plate, 7 ... Driving guide groove, 8 ... Driver plate, 9 ... Plate holder, 11, 12 ... Guide slope, S ... Unformed staple, Sa... Molded staple.

Claims (1)

[Scope of utility model registration request] A concave forming groove formed downward on the lower end of a forming plate provided on the device main body so as to be able to move up and down is opposed to the convex portion of an anvil fixed to the device main body, and the unformed staple is supported on the anvil. A staple forming mechanism that forms the staple into a U-shape between the forming groove and the convex portion, and a forming staple driving guide groove is provided at the front end of the staple forming mechanism, and the forming staple guided into the guide groove is driven into the material to be bound. In the driving device, at the bottom of both sides of the convex part of the anvil,
A staple forming mechanism in a staple driving device, characterized in that a guiding slope of a staple leg portion is formed to slope toward a forming staple driving guide groove provided in front of the anvil.