CN1212646A - Stapler having clinching mechanism - Google Patents

Abstract

A stapler for driving U-shaped staples into an object comprises a clinching mechanism (9) having two parallel wall elements (10a, 10b), which between themselves form a gap for receiving the legs of the staple which are driven through the object. An intermediate element (15), which extends in parallel with the wall elements, is arranged in the gap for dividing this into two juxtaposed partial gaps (11a, 11b). Two anvil elements (19a, 19b) are each arranged in a partial gap. The anvil elements (19a, 19b) are pivotable between a starting position and an end position for bending, when pivoting from the starting position to the end position, the projecting end portions of the legs, which are driven through the object, against the object and towards each other. The wall elements (10a and 10b) and the intermediate element (15) have cooperating guiding surfaces (14a, 16a; 14b, 16b) for guiding the ends of the staple legs into the respective partial gaps (11a, 11b).

Description

Stapler with a kind of clinching mechanism

The present invention relates to a kind of stapler, this stapler is used for that staple is hammered into an object and pricks paper as one, and described stapler comprises: one hammers into element, and it is arranged to release one is the staple of U-shaped substantially and this staple leg is passed object hammers into; With a clinching mechanism, this clinching mechanism has two parallel wall elements, these two parallel wall elements form a gap between them, be used to hold and pass the staple leg that this object hammers into, and each wall elements all has a spigot surface, is used for the end of each staple leg is imported this gap; And two anvil elements, they are arranged in this gap, and each anvil all can be around basic vertical with each a wall elements axle rotation, each anvil element can rotate between a start position and a final position, in this start position, they are provided with like this, so that the free end of each staple leg will begin the anvil element near separately when staple hammers in the object, and this final position is used for when the start position rotates to final position, makes the end sections that stretches out that passes the staple leg that this object hammers into crooked relative to one another against this object.

In European patent EP 0,322, such stapler is disclosed in 906.In this known stapler, clinching mechanism is so designed, so that when passing part that staple leg that object hammers into stretches out when having a total length greater than staple belly length from this object, can allow the staple leg overlapping in clenching operation.For this reason, rotatable anvil element is juxtaposed in this gap, so that each staple leg is curved two parallel planes.Each anvil element is set near a wall elements, and each wall elements all has a spigot surface, is used for the immediate anvil element of the terminal guide of each staple leg.Each anvil element only has a spigot surface on a side like this, this comprises a kind of rough sledding, when promptly the end of leg is positioned on the anvil element side relative with spigot surface when leaving object, the staple leg will be not crooked, and therefore do not collide the anvil element, concerning a kind of anvil element, particularly possible when object is thin this thing happens, and concerning another kind of anvil element, particularly possible when object is thick this thing happens.

In European patent EP 0,412, discuss as preface in 143 and disclosed a kind of stapler type in, got rid of this problem by the spigot surface of two collaborative works, the spigot surface of these two collaborative works just in time is arranged on each anvil elements on either side front each other.Aspect the essential structure of clinching mechanism, this stapler is different from above-mentioned stapler part and only is this fact, an auxiliary spigot surface that promptly is used for each anvil element is to form on one on that wall elements relative with this wall elements shoulder shape extension, and relevant anvil element is arranged near the wall elements.Therefore, concerning each anvil element, the auxiliary spigot surface arrangement extension thereon of anvil element is configured for the terminal sealing in that part of gap, wherein just is bent by the staple leg of another anvil element bending.Therefore this leg must have limited length, with convenient staple pass its object that hammers into be approach and when constituting this leg total length most of by the length that its shank that stretches out divides, be accommodated in this part gap.

The purpose of this invention is to provide a kind of stapler, its clinching mechanism designs like this, does not solve above-mentioned problem of giving staple leg guiding so that do not limit the length in gap.

According to the present invention, reach this purpose by a kind of stapler, this stapler is as the illustrated the sort of type of preface, and it is characterized in that, an intermediary element that is parallel to each wall elements is arranged in the gap, be used for this gap is divided into two juxtaposed part gaps, each anvil element is arranged in the part gap, and this intermediary element has spigot surface and the also suitable spigot surface that the end of another staple leg is imported another part gap of the spigot surface co-operating with another wall elements that a spigot surface co-operating with a wall elements also is fit to the end of a staple leg is imported a part gap.

Every pair of crew-served spigot surface preferably is made of two inclined-planes, and they just in time are positioned in front each other.

Each anvil element is suitable on the rotary intermediary element that is installed on its both sides.

Illustrate in greater detail the present invention now with reference to accompanying drawing, wherein:

Fig. 1 is a perspective view, and a kind of previous section of separating according to stapler of the present invention is shown;

Fig. 2 is the exploded view of each part included in the stapler clinching mechanism;

Fig. 3 is the top plan view of clinching mechanism;

Figure 4 and 5 illustrate the function of clinching mechanism when the thin paper of a bundle is fixed together;

Fig. 6 and 7 illustrates the function of clinching mechanism when the thicker paper of a bundle is fixed together;

Fig. 8 and 9 illustrates when pricking being fixed together with the thicker paper of a bundle of approaching with one respectively, the outward appearance of stapler after clenching operation.

Each accompanying drawing an invention stapler only is shown those be main parts to the present invention.Shown stapler is special to be planned to be used for to be fixed together with a form of pricking 1 (Fig. 4-7) permitting plurality of sheets of paper, this stapler comprises that a base plate 2 and one hammer into element 3, it is suitable for releasing a staple staple 4 from a magazine (not shown), and passes leg 4a and the 4b that this bundle paper 1 hammers into staple 4.

The previous section of base plate 2 only is shown in Fig. 1-3, and this base plate 2 has the fixedly ear 5 of two band screws 6.This base plate 2 also comprises two top extensions 7 that stretch out forward and two following extensions 8 that stretch out forward.

Stapler also comprises a clinching mechanism 9.This clinching mechanism 9 comprises a top flat 10, and the cross section of this top flat 10 has down the shape of U basically.Two legs of top flat 10 form vertical wall elements 10a and 10b, and wall elements 10a and 10b are parallel to each other, and form a gap 11 between them.The belly 10c of top flat 10 heart therein partly has a staple opening 12, and this opening 12 is communicated with gap 11.Two wall elements 10a and 10b respectively have mounting flange 13a, a 13b who extends laterally.

Form therein in opening 12 that part of, wall elements 10a and 10b respectively have inclined-plane 14a, a 14b.This inclined- plane 14a and 14b form in the upper edge part of wall elements, so that when needed staple leg 4a, 4b are imported in the gap 11.Centre-to-centre spacing between inclined-plane 14a and the 14b equals the distance between staple leg 4a and the 4b.

It is on the egative film 15 of plate shape substantially that top flat 10 is arranged at, and this egative film 15 forms the spaced walls parallel with 10b with the wall elements 10a of top flat 10 in gap 11, and is divided into two juxtaposed part gap 11a and 11b (Fig. 3).The upper edge of wall elements 10a and 10b partly is positioned at identical horizontal plane in the upper edge of egative film 15 part and opening 12 zones, the upper edge of this egative film 15 partly has two inclined- plane 16a and 16b, inclined- plane 16a and 16b just in time are positioned at the front of inclined-plane 14,14b, so that with its co-operating, be used for staple leg 4a, 4b lead-in portion gap 11a, 11b.

Egative film 15 has two pins 17 near the marginal portion in the above, and this pin 17 vertically stretches out with opposite direction and forms corresponding depression 18 at the relevant opposite side place of egative film 15.The cross section of pin 17 is circular, and their length equals the width of part gap 11a, 11b separately.Pin 17 is configured for the pivot of two anvil element 19a, 19b, and the pivot of this anvil element 19a, 19b respectively is arranged among part gap 11a, the 11b.

Egative film 15 partly is twice bending along its lateral edge, and because crooked result, it all has a lateral lip of stretching out 20 on each side.Each lateral lip 20 is positioned in the both sides (see figure 3) of egative film 15 principal planes.In each of two bending areas, all form the groove 21 of a perforation.

Clinching mechanism 9 usefulness screws 22 are fixed on the base plate 2, and the groove 21 that screw 22 passes in the egative film 15 extends, and are fastened in the hole 6 in the fixedly ear 5 of base plate 2.The lateral lip 20 of egative film 15 is against fixing ear 5, and two couple that each lateral lip 20 is arranged in base plate 2 is up and down between extension 7,8 wherein a pair of.Top flat 10 utilizes its a mounting flange 13a and its another mounting flange 13b to remain on correct position, this mounting flange 13a be engaged on base plate 2 a top extension 7 below, and mounting flange 13b inserts (see figure 1) in one of them groove 21 of egative film 15.

Anvil element 19a and 19b can be around pivot pin 17 at start position (Fig. 1,4 and 6) and between the final position (Fig. 5 and 7) rotate, in this start position, they are arranged by this way, when hammering into staple in this bundle paper 1 with box lunch, the free leg end of staple 4 will begin near corresponding anvil element 19a, 19b, and this final position is used for when when the start position rotates to final position, and it is crooked relative to one another to make the extension dividing potential drop of passing staple leg 4a that this bundle paper 1 hammers into and 4b the downside (Fig. 5 and 7) of this bundle paper 1.Two anvil element 19a and 19b utilize a driving element (not shown) rotation, and this driving element extends in the egative film 15 in the formed openings 23, and can vertically move in this opening.

When hammering into element 3 staple leg 4a and 4b are hammered into when passing this bundle paper 1, meet on anvil element 19a and the 19b end of each staple leg, therefore curves inwardly, and what be used to as shown in Figure 4 approach one pricks paper 1, and be used for thicker one as shown in Figure 6 and prick paper 1.Staple 4 hammers into shown in Fig. 4 and 6 fully.

When staple hammered into fully, driving element rotated to final position with anvil element 19a and 19b from the start position, and staple leg 4a and 4b are curved (Fig. 5 and 7) on the downside that leans against this bundle paper 1 like this, that is was pressing this bundle paper 1 to clench.In their position of bending, staple leg 4a and 4b extend parallel to each other and are separated by a distance, and described distance is by the thickness decision of egative film 15.Bundle paper that is used to approach shown in Figure 8 and the staple 4 that is used for a thicker bundle paper (all not shown paper pricks 1) shown in Figure 9 are in the outward appearance when clenching the position.

Claims (3)

1. stapler, be used for that staple (4) is hammered into an object (1) and prick paper as one, described stapler comprises: one hammers into element (3), and it is arranged to release one is the staple (4) of U-shaped substantially and this staple leg (4a, 4b) is passed this object hammers into; With a clinching mechanism (9), this clinching mechanism (9) has two parallel wall elements (10a, 10b), these two parallel wall elements (10a, 10b) form a gap (11) between them, be used to hold and pass the staple leg that this object (1) hammers into, and each wall elements (10a, 10b) all has a spigot surface (14a, 14b), is used for the end of each staple leg is imported this gap (11); And two anvil element (19a, 19b), they are arranged in this gap, and each anvil all can be around basic and each wall elements (10a, 10b) vertical axle revolves axle, each anvil element (19a, 19b) can between a start position and a final position, rotate, in this start position, they are provided with like this, when hammering in the object (1), staple (4) will begin anvil element (19a near separately with the free end of each staple leg of box lunch, 19b), and this final position is used for when the start position rotates to final position, make and pass the staple leg (4a that this object hammers into, the end sections that stretches out 4b) is crooked relative to one another against this object (1), it is characterized in that, one and two wall elements (10a, 10b) parallel intermediary element (15) is arranged in the gap (11), be used for this gap (11) are divided into two juxtaposed part gap (11a, 11b), each anvil element (19a, 19b) all be arranged in the part gap, and this intermediary element (15) has one with spigot surface (14a) co-operating of a wall elements (10a) and be suitable for spigot surface (14b) co-operating and the suitable spigot surface (16b) that the end of another staple leg (4b) is imported another part gap (11b) that end with a staple leg (4a) imports the spigot surface (16a) in a part gap (11a) and and another wall elements (10b).

2. the stapler described in claim 1 is characterized in that, every couple of crew-served spigot surface (14a, 16a; 14b, 16b) inclined-plane of front constitutes by just in time being positioned at each other.

3. the stapler described in claim 1 or 2 is characterized in that, on the rotary intermediary element (15) that is installed on its both sides of each anvil element (19a, 19b).

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