DE1275988B - Stapler with automatic exposure of the staple filling space - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B 42b

German KL: 11 a-Il

Number: 1275 988

File number: P 12 75 988.5-27 (K 59098)

Filing date: April 27, 1966

Opening day: August 29, 1968

The invention relates to a stapler with automatic exposure of the staple filling space Absence of a staple, which device has a magazine containing the staples with an under Has spring action standing clamp slide and a cover hood that actuates the knife, both of which are articulated to a base plate carrying the stapling die.

A wide variety of embodiments are already known for such stapling devices. It exists In many cases, the task is to keep the filling space of the device that receives the staples as close as possible Easily accessible after attaching the last staple of a staple rod to be able to insert a new clamp bar as easily and conveniently as possible.

For this purpose, in particular, facilities on staplers have already been made by the Germans Patents 1104 486 and 1108 661 known, where it depends on the consumption of the the last clamp to automatically expose the clamp filling space, namely in use with a A stapler in which the part of the staple channel containing the joint channel is like a drawer can be pulled out to the front. Here, this automatic triggering of the uncovering movement of the as Drawer protruding staple channel from when reaching a certain position of the advanced Clamp slide of the device. It does this in such a way that on the upper edge of the staple magazine a bracket is attached, which in turn receives a two-armed locking lever, one end of which is attached to the lever engages the front edge of the drawer and the other end of the lever is shaped or configured in this way is that it is in the direction of movement of a trigger controlled by the staple advance spring. The automatic protrusion of the part forming the clamp channel is thus dependent instead of the clamp advance pushing the clamp pusher. This has the disadvantage that this the empty state of the clamp filling space is sensed indirectly, to a certain extent, namely via the position of the clamp slide. This can easily lead to inaccuracies, especially if an adjustment of the release mechanism occurs, so that in this case the filling space may be undesirable pops up for refilling when not all of the clips have been used. aside from that it should also be taken into account that this known, automatically operating release mechanism is unique can only be used appropriately for devices with a clip channel that can be pulled out like a drawer.

Stapling device with automatic exposure of the staple filling space

Applicant:

Karl Kammer, 7630 Lahr, Moltkestr. 23

Named as inventor:
Karl Kammer, 7630 Lahr

In contrast, the invention is based on the object of automatically making the clamp filling space accessible to be brought about in a way that avoids the aforementioned inconveniences.

ao ben and where it is also important to create additional advantages that also improve the entire device design. This is achieved according to the invention in that an organ is provided which independently of the position of the staple slide detects the presence of staples. By this measure, an operation is now achieved in which scanning of the empty condition occurs in the Klammerfüllraumes directly depending on whether or staples are present or not. The criterion is the empty state of the clamp filling space itself and not the achievement of a specific clamp slide position. The fact that there is a sensing element that scans the staples and can only have a triggering effect when the place where there is usually a staple has become free, especially when the last staple that was still in the device is deepened there are significant benefits. This is because the invention can now be implemented in any type of stapler. It is no longer a matter of reaching a specific clamp slide position. You are independent of the size and strength of the staples. There is no need to adjust the release mechanism to adjust the correct release time.

A particularly useful and simple embodiment within the meaning of the invention is obtained when, for. B.

as the presence of staples sensing organ in the staple filling space or staple magazine a two-armed rocker above the clamps

809 598/7

Od. The like. Is arranged that when the magazine is full with its front shorter lever arm on the still in the Filling space located clamps rests, while their rear longer lever arm with an unlocking device is equipped for the mechanism for exposing the staple filling space. This seesaw then at the same time also prevents the clips from being pushed over one another into their filling space possibly broken staple bar.

The mentioned rocker can be used for the most varied types of stapling devices, e.g. for Staplers with from above by opening the pressure cover or from below by pulling back the base plate to be exposed staple magazine or in those devices that prefer a have forward-opening drawer-shaped staple filling space, which is then after stapling the last clamp is automatically brought into its open position.

In such staplers, which have a staple magazine accessible from above, must for the purpose Exposure of the same the pressure hood can be opened. The clamp filling space is used for this purpose and the pressure hood articulated on a common axis and both mutually effective subject to a torsion spring which tends to spread the two parts apart. Since this, however should only take place when the last staple in the magazine is stapled, are the pressure hood and the The staple filling area is locked together by a lock, which is then activated by the above the staple magazine arranged rocker is released. Appropriately, this rocker is then by means of compression springs on the Pressure hood attached so that the rocker is taken along by the pressure hood when it is opened to enable access to the magazine.

In the case of staplers with a drawer-like staple magazine, this magazine is also through ekie rocker arranged above it or the like in the closed Position held. The rocker can only work once the last clip has been fixed in the magazine can be operated by the pressure hood to unlock the drawer and then through to bring a compression spring into its open position.

It is also of considerable importance that this spring which causes the drawer to open both with its front end firmly to the drawer and with its rear end firmly to the rear wall of the magazine is connected. In this way, the advantage is achieved above all that the ejection the spring causing the drawer to stop elastically after reaching its maximum expansion the drawer causes.

Another advantageous embodiment of this stapler is based on the fact that in the staple magazine directly behind the staple ejection channel, a staple cutter is fixedly arranged, which at the same time with its front and the inner end wall of the clamp filling space or the inner end wall of the Drawer forms this staple ejection channel. This has the main advantage that when stapling the shearing of the foremost staple from the staple bar is made much easier.

By the elastic locking device of the drawer-shaped magazine by means of a locking spring it is achieved that the staple ejection channel is thus also elastic. Should namely when stapling If two or more staples have jammed in the upper part of the staple ejection channel, the end wall the drawer yield to a certain extent by causing the drawer to lock Locking spring when a tension occurs due to a bulging a slight opening of the Drawer and thus a yielding of this wall of the staple ejection channel allows. Such an elastic one In such a case, yielding generally prevents deformation of the staple ejection channel

ίο by the means provided for this purpose.

Another significant improvement is obtained when the stapler is designed so that the Base plate and the side cheeks serving for the lateral guidance for the staple body have a common Form component that is preferably formed with the named cheeks over the entire length of the staple body extends, these side cheeks bent over both at their front free ends as end face parts and preferably also at least partially longitudinally

ao their upper edge are still folded inwards as a guide fit for the staple body.

Another new feature of this stapler is that the two are arranged on the bending die and the different types of stapling serving to each other pairs of troughs on the swiveling stapling die are provided standing at an angle by z. B. at an angle of preferably 30 to Cut 35 ° overlapping. As a result, when the bending die is adjusted from one to the other other stapling a pivoting of the same no longer by 180 ° as previously required. It is enough rather z. B. 30 to 35 °.

The following are staplers corresponding to the invention with their essential elements of the invention Details are described and explained in more detail in two exemplary embodiments with reference to drawings. Here is in the F i g. 1 to 3 show a stapler in which, after the last staple has been stapled for the purpose of exposing the staple filling space, the pressure cover causing the stapling can be opened automatically is made. 4 to 12 deal with a stapler corresponding to the invention, which is used as a staple filling space has a drawer that slides out forwards when the last staple is stapled is automatically brought into the open position. It shows in detail

Fig. 1 is a vertical longitudinal section of the staple body of the stapler mentioned with partially still full staple magazine, but shown without the base plate to which it is hinged,

F i g. 2 shows a horizontal section according to the one shown in FIG. 1 drawn section line II-II and

F i g. 3 also shows a vertical longitudinal section analogous to FIG. 1, but with an empty magazine,

F i g. 4 the mentioned stapler with drawer magazine in a side view,

F i g. 5 this device in a view of its front face with the front cover removed, seen from the left,

6 shows a horizontal section along the lines shown in FIG. 4 drawn section line VI-VI,

F i g. 7 shows a vertical longitudinal section along the line VII-VII in FIG. 6 when partially refilled Magazine,

Fig. 8, drawn on a slightly larger scale, the channel of the device serving as a guide for the drawer in a side view,
F i g. 9 a vertical longitudinal section of the stitching

5 6

body, analogous to FIG. 7 illustrates, but in the longer lever arm of the rocker 13 and gives the position after deepening the last clamp the locking hooks 17 free, which then in the direction of in mer of a clamp bar without a base plate and without a fig. 1 indicated arrow 21 of the force of the gate pressure lever, sion springs 18 following in the unlocked position

F i g. FIG. 10 is a vertical cross-section after that shown in FIG. The consequence of this is that the

F i g. 9 drawn intersection line X-X, binding between the Klammerfüllraum 1 and the

11 shows a horizontal section after the cutting pressure lever 2 is released and this after completion

line XI-XI in Fig. 9 and the one stapling the last staple in the magazine

F i g. 12 also a horizontal section, but the printing process together with the rocker 13 through

according to the section line XII-XII in FIG. 9, the torsion spring 20 in the direction of the arrow 22

As can be seen from FIGS. 1 to 4, the booklet (FIG. 3) is automatically opened, as is the case in FIG

body of the booklet shown in these figures. 3 position indicated by dash-dotted lines

device essentially from a Klammerfüllraum 1 illustrates. The clamp filling space 1

and the one that is hinged to it at one end for the purpose of inserting a new staple

Pressure lever 2. Both parts are then actively exposed on one.

common axis 3 can be swiveled in a known manner. It should be noted here that the

on the laterally raised bearing blocks of the basic short end of the rocker 13 acting spiral spring 11 so

arranged plate (not shown in the drawing). the nature of it is that it exerts greater pressure

The front end of the clamp filling space 1 is wider than that acting on the longer end of the rocker 13

a wall 4 completed. Behind it is a spiral spring 12 at a distance of 20.

A clamp shear spring 11 and 12 and corresponding leaf springs or of approximately one clamp thickness

block 5 arranged, which uses a saddle for the front means otherwise suitable for the same purpose.

Forms the end of the inserted clamp rod 6. Find through manure. The lever arm ratio of the rocker 13

the wall 4 and the front of the clip scraper is about 1: 4 to 1: 5.

block 5, a staple ejection channel 7 is formed, 25 the stapler according to FIG. 4 to 12 has a basic diameter each of the foremost clamps of the clamp plate 31 with upwardly bent side cheeks merstabes 6 by means of the push knife 8 down 32, which parts preferably from a single can be ejected violently. Insist behind this piece. His body is on the whole at 33 Staple cutter block 5 is designated for pushing in (FIG. 9). The side cheeks 32 of the basic brackets a clamp slide 9 available, the 30 plate 31 serve on the one hand as bearing blocks for the is under the action of the compression spring 10 and the rfeftkopf 33 and on the other hand as a lateral guide Task has the clamp bar 6 against the front once with their upper bent ends 34 for wall 4 of the clamp filling chamber 1 to press. the pressure lever 35 and on the other hand with their equal

On the pressure lever 2 is by means of two spiral springs 11 if bent front ends 36 (Fig. 5) for and 12 a rocker 13 attached, which in the use 35 the stapling body 33 to avoid lateral play position with its lower surface on the staple bar 6 and a precise meeting of the die with the staple rests and holds it securely in its position. Ensure the brace. The front and that Rocker 13 is by means of a transverse axis 14 in two as the rear part of the side cheeks 32 are then purpose-bearing Serving cutouts 15 of the upper part moderately by covering hoods 28 and 29 the side cheeks of the clamp filling space 1 tilting 40 completed.

stored in cash. At the free end of the longer rear the staple body 33 consists essentially of Lever arm of the rocker 13 it is formed with one above the magazine channel 37 and the hood Width of the staple filling space extending beyond the pressure lever 38, which by means of a common equipped with the cross bar 16, the axis 39 in the side cheeks 32 can be pivoted vertically for unlocking the lock is mounted between pressure lever 2 and Klammerfüll- 45. In the channel 37 this is the bracket space 1 serves. This lock consists of a magazine forming drawer 40 housed in Pressure lever 2 pivotably arranged locking hooks their bottom with a guide slot 41 from-17, which is armed under the action of a torsion spring 18. Through this slot protrudes with his understanding and from a rear in the clamp filling space 1 young foot end of the by means of a screw 27 in the provided locking bolt 19. _ 50 bottom of the channel 37 attached staple cutter block

The operation of the above-mentioned Ge 42. This staple cutter block 42 forms with his The advice is as follows: If the magazine is filled with clips on the front and the inner end wall 43 of the drawer, the stapling is done by pressing the drawer 40 in the closed position, the staple pressure lever 2, whereby the rocker 13, especially the discharge channel 44. The block 42 facilitates stapling also by the stronger spiral spring 11 firmly against the 55 the shearing of the respective foremost clip from Clamp bar 6 applies. There is also an over-clamp bar 6 left in the direction of the shear-off block A clamp slide 45 can be pushed together from possibly broken apart 42 to the front Prevented staple splitting. Seen by Niederdrük, who has the task of helping one in one ken of the push knife 8 is the foremost slotted tube 46 guided compression spring 47 as a result Clamp separated from rod 6 and stapled. Will push 60 staple bar 6 forward. The drawer then the last clamp of a clamp bar 6 itself is exposed to the action of a second one needs (Fig. 3), the rocker 13 is located at the compression spring 48 arranged from the guide tube 46, Exercise of the pressure no longer has any resistance due to the effort to move the drawer 40 into the open ends stapled staple bar. You can therefore bring the position. One end of this spring 48 is Give in to the pressure of the spring 11 and about its axis 14 65 on the rear wall 49 of the magazine channel 37 tilt until they are shorter with their free end of the front and the other end on the rear wall 50 of the thrust Lever arm fixed on the staple cutter block 5 loading 40, causing the ejection movement rests. As a result, the free rear end of this drawer 40 rises and is gently braked.

Claims (1)

A rocker 51 is arranged above the drawer 40. their pivot axis 52 continues in a slot 53 of the hood 38 against the force of the compression spring 64 Side walls of the channel 37 finds its storage. With pressed down until the pressure hood 38 with her its front end 54 of its shorter lever arm embossing 63 rests on the pressure pin 56, If the magazine is full, this rocker 51 lies with its 5 while at the same time the push knife 30 is the foremost Underside on the clamp rod 6 and holds the clip from the clamp rod and separates into the staple safe in its position, which is also what drives in a good. This pressure pin 56 has in this pushing any broken clamp case the task of moving the push rod parts downwards is prevented. Over the front end 53 hood 38 to limit. He can follow the pressure A pawl 55 is arranged on the rocker 51, which at the bottom does not yet give way as long as there are still clamps on the one hand pivotably mounted on the axis 52 and are present in the magazine, since the supporting him on the other hand, with its free and downward detachable pawl 55 with its free end 61 on the rocker 51 curved end 61 rests on rocker 51. She and this in turn on the one still lecturing in the magazine an upwardly directed pressure pin 56, rests on the brackets. which protrudes through an opening of the bearing plate 57, 15 However, if the last staple is stapled, then that in turn on the side walls of the channel 37 ** ■ can when pressure is again exerted on the find their camp. In the rear longer lever arm of the pressure lever 35 of the pressure pin 56 is still slightly behind Rocker 51 is in the area of the bottom dodge located below it, since the short end 54 of the rocker Back wall 50 of drawer 40 only has an opening 51 due to the lack of clips in the magazine 58 provided, through which the free and slightly after 20 again a resistance on the around a bracket below bent end 59 of a leaf spring 60 protrudes. strengthen the deeper surface of the bracket-this The end 59 of the leaf spring 60 is supported on the inside by peeling off 42. This leads to the shorter one against the rear wall 50 of the drawer 40, around the latter front lever arm 54 of the rocker 51 a downward movement in the closed position. That free movement by a staple strength during the End 62 of this longer lever arm of the rocker 51 25 longer rear lever arm of the rocker 51 with his a pivoting movement then protrudes through a recess in the rear end about the axis 52 wall 49 of the channel 37, in order to create the possibility of the above, as a result of the leverage of the fen, the unlocking of the drawer 40 is so great that the free end 59 of the rocker arms To be able to make by hand. Leaf spring 60 out of engagement with the inside of the This also arrives at the rear wall 50 of the drawer 40 such that it can pivot on the axis 39. This has to orderly pressure hood 38 is in the area of the pressure result that the drawer 40 by its compression spring 48 bolt 56 equipped with an impression 63. is ejected forward and thereby into the This serves once as an upper storage stop for the open position. This not only makes it autodetic Pressure pin 56 surrounding compression spring 64 and indicated automatically that the magazine is empty, but rather on the other hand, when the pressure hood 38 35 is actuated, a new staple rod is also very much inserted as a pressure point for the pressure pin 56. One at the conveniently facilitated. Underside of the pressure hood 38 arranged leaf spring By attaching the two ends of the pressure 65 serves as a backup for the locking function spring 48 on the one hand on the rear wall 50 of the Schubder Leaf spring 60, drawer 40 and, on the other hand, on the end wall 49 At the outer upper end of the side walls 32 is 40 of the channel 37, the advantage is still achieved that the the pressure lever 35 is mounted on the axle 66. It is ** compression spring 48 when the drawer 40 is pushed out with an elasti-pressure roller mounted in its side cheeks to achieve their maximum expansion 67 equipped, which causes the drawer 40 to stop when the "* cal" is actuated. Pressure lever 35 the pressure on the pressure hood 38 A particular advantage of the invention exercises. A stapling device arranged on the pressure hood 38 is also located in the elastic hook 68, which partially encompasses the pressure roller 67, forming the staple ejection channel 44. This channel connects the pressure lever 35 and pressure is on the one hand from the rear inner hood 38. This arrangement creates a lever front wall 43 of the drawer 40 and, on the other hand, of translation, which considerably facilitates the stapling of thick stacks of material to be stapled even from the front end of the staple cutter block 42. 50 formed. Should here in stapling two or on the base plate 31 pivotally angeord- _m ore parentheses in the top part of the staple ejection Nete die 69 that the have the channel jammed when stapling the bending, the end wall can be effected 43 clip legs is provided with two pairs of the drawer 40 equipped to a certain degree after bending recesses, one being provided by arching the pair of recesses 70 serving to lock the drawer 40 loosely stapling to the other 55 causing leaf spring 60 when stapling firm stapling occurs Slight opening pair 71 at an angle of about 30 to 35 ° to the drawer 40 and thus giving way to this is in order. This allows for an adjustment of the wall of the staple ejection channel. By-Umbiegematrize from one another to the stitch _S is elastic yielding in such a case, only one pivoting thereof about 30 to 35 ° ER- 60, a deformation of the staple ejecting channel verforderlich (Fig. 6). prevents the removal of the jammed clamp The mode of operation of the stapler described last is very much easier, device is the following. If stapling is still carried out with staples. see magazine, the entire issue 65 body 33 from the pressure lever 35 via the pressure roller 67 1st stapler with automatic release pressed down until the opening of the staple placement of the staple filling space in the absence of a ejection channel 44 rests on the material to be stapled. In the far- staple that one the staples from- holding magazine with a spring-loaded staple slide and a push knife having actuating cover hood, both with a stapling die carrying Base plate are articulated, characterized in that an independent of the position of the staple slide (45) self-sensing for the presence of staples Organ (13 or 51) is provided. 2. stapler according to claim 1, characterized in that as the presence of Staple scanning organ in the staple magazine a two-armed organ above the staples Rocker (13 or 51) or the like. Is arranged, the shorter when the magazine is filled with its front Lever arm rests on the clamps that are still in the filling space, while your rear longer Lever arm with an unlocking device for the mechanism for exposing the staple filling space is equipped. 3. Stapling instrument according to claim 1, characterized in that mounted in the staple magazine (1) on a transverse axis (14) rocker (13) or. The like. At its longer rear lever arm with an unlocking of the lock for the exposure of the Klammerfüllraumes causing member , e.g. B. a cross bar (16) is equipped. 4. stapler according to claim 1 to 3, characterized in that the rocker (13) od. Like. By means of z. B. two springs (11 and 12) exerting a downward pressure or the like the lever actuating the device (pressure lever 2 or pressure hood 38) is arranged. 5. stapler according to claim 1, characterized in that the about its pivot axis (52) tiltable, two-armed rocker (51) or the like. On its front shorter lever arm (54) with a the pressure of the pressure hood (38) absorbing and transferring pressure pins to the rocker (56) is equipped. 6. stapler according to claim 1 and 5, characterized in that the rocker (51) od. The like. On its rear longer lever arm with a locking mechanism for the drawer (40) Link z. B. in the form of a with its free end (59) through an opening (58) the rocker protruding leaf spring (60) is equipped. 7. stapler according to claim 1, 5 and 6, characterized in that the rear longer The length of the lever arm (62) of the rocker (51) or the like is dimensioned so that it can be triggered the locking device by hand z. B. by protruding into a recess in the rear wall (49) of the housing (37) is made detectable. 8. stapler according to claim 1, 5 to 7, characterized in that means are provided which allow the open movement of the filling space spring-loaded drawer forming, e.g. by opening the drawer (40) Compression spring (48) is arranged so that it has one end on the rear wall (49) of the Housing (37) and at its other end on the rear wall (50) of the drawer to be ejected (40) is moored. 9. stapler according to claim 1 to 8, characterized in that immediately behind the staple ejection channel (7 or 14) a staple cutter block (5 or 42) or the like. Is arranged, the with its front face and the rearward facing inner end wall (4) of the clamp filling space (1) or the inner one The end wall (43) of the drawer (40) forms the staple ejection channel (7 or 44). 10. stapler according to claim 1, characterized in that the staple ejection channel (44) is made elastically yielding effective in its width in the case of clamp jamming, z. B. achieved by the resilient locking of the drawer (40) in its closed position, causes by means of a yielding spring (leaf spring 60). 11. stapler according to claim 1 to 10, characterized in that the base plate (31) and the side cheeks (32) used for lateral guidance for the staple body (33) have a common Form component, which is preferably with said cheeks over the entire length of the Staple body extends. 12. stapler according to claim 1 and 11, characterized in that the with his Base plate preferably consisting of a single common workpiece side cheeks of the device bent over at its front free ends as end face parts and preferably also at least partially along its upper edge as a guide fit for the staple body (33) are folded inwards. 13. Stapling device according to claim 1 or one of the following claims, characterized in that that the two pairs of troughs (70 and 71) used for the various types of stapling are provided on the pivotable staple die (69) standing at an angle to one another by she z. B. cut overlapping at an angle of preferably 30 to 35 °. Considered publications:
German Auslegeschrift No. 1104 486,
661;
Austrian patent specification No. 209 858. 1 sheet of drawings 809 598/7 8.68 © Bundesdruckerei Berlin