DE959008C - Device for the production of staples - Google Patents

Description

ISSUED FEBRUARY 28, 1957

B 28351 Ib17d

There are methods and devices for the production of staple bars from a glued one or soldered wire or sheet metal strip, which is periodically driven by a pair of conveyor rollers fed to a cutting device, cut into certain lengths and bent at the ends becomes known. The cutting and bending of the cut wire or sheet metal strip takes place here by means of a movably mounted carriage, ίο which carries the cutting knife and the bending anvil and which is pressed down by a cam. This allows cut and bent Sheet metal or wire strips are only produced during the downward movement, during the Anvil does no work on its upward movement.

Another known device has the disadvantage that the leg lengths of the clamps must be equal to half of the back of the clamp and that furthermore the legs are bent individually so that the performance by means of such a device is relatively small remain.

The device according to the invention is characterized by a back and forth controlled bending anvil, with two opposite, across the

Direction of movement arranged work surfaces and the work surfaces assigned, separated from Bending anvil controlled clamps.

Furthermore, according to the invention, the anvil can be exchanged and the pairs of benders can be removed adjustable in order to be able to produce clamps of different sizes.

Finally, it is proposed according to the invention that below the work surfaces of the ίο Anvil two openings are provided in the machine frame, to which channels are connected in this way are that the right and left each produced clip bars with their leg tips are guided facing each other, whereby a pre-layering of the clamp bars he follows.

In the drawing, the essence of the invention is exemplified and illustrated schematically, namely shows
so Fig. ι a plan view,

Fig. 2 is a side view,

3 and 4 schematically the operation of the device.

The glued or soldered wire band or sheet metal band 1 comes from not shown further Squeeze rollers and is then periodically in a known manner by a pair of conveyor rollers 2, 3 a cutting device 4 is supplied. To take the strength of the wire band 1 into account can, one of the rollers of the roller pair 2, 3 is mounted so that the axis distance can be adjusted can. This can be done in a known manner by eccentric or pivotable mounting or displaceability take place. The shearing device 4 consists of a fixed knife 5 and one movably mounted shear blade 6, which is mounted on a pivotable about a bolt 7 Lever 8 is mounted. The bolt 7 is expediently adjustable in the machine frame to prevent wear the cutting knife 6, 5 to be able to take into account. At the other end of the lever arm is a roller 9 provided, which by means of a spring 11 acting on the frame 10 against a cam disk 12 is present. The cam disk 12 is firmly seated on a shaft 13 and carries a gear 14, which meshes with a gear 15. The gear 15 is mounted on a shaft 16 and has a cam disk 17 and a second cam guide 18. The gear ratio of the Gears 14 and 15 is 1: 2, i.e. H. so, that Gear 14 makes two turns, while the cam 15 makes only one turn, like this so that a cut is made at every anvil path. The cam 17 controls rollers 19 and thus a guide sleeve 20 in which a Festhal ter 21 with the interposition of a spring 22 is stored. In the curve guide 18 running en rollers 29, which an anvil holder 30 with a Move anvil 31 back and forth. Opposite the retainer 21, a second retainer 32 is provided, which is also mounted in a guide sleeve 34 with the interposition of a spring 33 is, which carries rollers 35 at the end, which in turn have a curved guide 36 equipped gear 37 are performed. The latter is coupled to the gear 15 so that both have the same number of revolutions.

In the frame 10 there is also one bolt each 23, 24 each one bender 25, 26 rotatably mounted, with adjusting screws 27, 28 allow the distance between the bending jaws to be changed.

In the anvil holder 30 there are two openings 38, 39, specifically in the vicinity of the head ends of the bending anvil. Channels are connected to the openings in such a way that they can be pre-layered of the clamp bars the clamp bars produced on the right and left with their Leg tips are guided facing one another. The anvil 31 is interchangeable to change the width of the spine of the staples if necessary.

The operation of the device according to the invention is as follows: The soldered or glued Wire band is inserted between the bending anvil 31 and the retainer 21. This sits down after the end of the advance of the tape to the end of the same and thus holds it firmly. Now a certain part is cut off from the wire or sheet metal strip by means of the knives 5, 6.

From the position illustrated in FIG. 4, the bending anvil 31 moves together with the pressing retainer 32 to the left, thereby forcing the cut piece of tape that is carried along by the left bender 25, 26. Here, the two tape ends protruding over the bending anvil are bent at right angles. As soon as the movement to the left ends, the separately controlled clamp releases 32 releases the finished staple bar, which falls through the passage 39. This is what the Fig · 3 · Now the same process takes place on the right side instead, so that with the second half turn a staple bar is completed again will. This work cycle is repeated continuously.

Claims (4)

PATENT CLAIMS: i. Device for the production of clamp bars from a glued or soldered one Wire or sheet metal strip, in which the strip is periodically removed from a pair of conveying rollers Cutting device fed, cut into certain lengths and held by a holder pressed against an anvil between fixed bending edges, the, the Bend protruding ends, generally characterized by a back and forth controlled bending anvil (31), with two opposite work surfaces arranged at right angles to the direction of movement and holding fixtures assigned to the work surfaces and controlled separately from the bending anvil (21, 32). 2. Device according to claim i, characterized in that that the anvil (31) is exchangeable and the removal of the pairs of benders (25, 26) is adjustable. 3. Device according to one of the preceding claims, characterized by below the work surfaces of the anvil provided openings (38, 39) in the machine frame for the falling through of the finished clamp bars. 4. Apparatus according to claim 3, characterized in that channels to the openings are connected in such a way that for a pre-layering of the clamp bars the right and left each produced clip bars with their leg tips facing each other be guided. Considered publications:
German patent specifications No. 651 843, 909 336. For this purpose, 1 sheet of drawings © 609 617/5 8.56 (609809 2.57)