DE2449568A1 - SELF-CLAMPING STAPLES - Google Patents

Description

PATENT \ JN W4.IT E

br. ing. H. NEGENBANK (-1973) 01PL.-ING. H. xxAXTCK · dip ^ .- phys. W. SCHMITZ dipl.-ing. E. GRAALFS dipping. W. WEHNERT

25 878 HAMBURG-MUNICH

DELIVERY / PERSONAL ADDRESS: HAMBtTRG 36 · NEWER ΛΫΑΙΧ , ".", "TEX. 36 74 88 AND 30 4115

ILLINOIS TOOL WORKS, INC. "" ". "" »Λ, * ™», ha * b ™

85ol West Higgins Road Munich is · mozartstr.

Chicago, Illinois 6o631 m sauce

TBLEGIl. NEGEDAPATENT MUNICH

United States

Hamburg, October 17, 1974

3 ± ch »elb ^ ttätly

Ti'i invention concerns a she ¹ - ^ elbittäti ^ featklerunende, a ', i, j iietallflac'-dra ^ t ¹ ^ ergeatelite Heftklaniaer, rlie an elongated ^:: iteg ai: .f- / ei3t, which on both andes in integrally trained., ä ± c ^u rec ^ tv / including .oc ^v -enkel ü

Ίϊ'ΐη important aim of the invention be ^ fce ^ t in the .'c ^ affung a self-locking nebula that is made of made of a comparatively thin MetallflacMra ^ t that the clamping has a minimum Y / resistance opposed when it is completely replaced by a plate-shaped Workpiece is driven.

S09818 / 0317 " ² "

BATH ORIGINAL

Another aim of the invention is to create an automatically locking staple of the aforementioned type, in which the leg sections are rotated about their longitudinal axes so that they cause an automatic clamping movement of the leg sections when they driven through a workpiece.

Another object of the invention is to provide a novel, self-locking staple of the aforementioned type, which is designed so that the measure the longitudinal movement of the leg portions as they are driven through a workpiece is limited.

More precisely, the subject of the invention is a self-locking staple made of flat metal wire, in which a controlling interaction between the Flac * -> wire and the penetrated workpiece ensures an automatic clamping movement of the thigh sections.

Two exemplary embodiments of the subject matter of the invention are intended will now be described in connection with the drawings. Ss show:

j? y. 1 is a perspective view of a first embodiment a self-locking staple according to the invention §

FIG. 2 is a front view of the staple shown in FIG in a position to be driven by a plate-shaped workpiece with associated electrical wiring;

509818/0317

Pig. Figure 3 is a side view of the staple shown in Figure 2;

FIG. 4 shows a view similar to FIG. 2 after the staple has been partially inserted into the plate-shaped form Workpiece is driven;

Fig. 5 "is a view similar to Fig. 4, in which the The staple is advanced further through the workpiece, with the binding ends becoming more rigid Clamping movement carried out towards each other ■ Have;

Fig. 6 shows the staple after it has been completely through. the workpiece is driven, wherein the leg portions assume the final clamping position ;

Figure 7 shows a modified embodiment of the self-locking staple according to the invention in the starting position opposite a workpiece;

Fig. 8 is a horizontal partial section essentially Line 8-8 of Figure 7;

FIG. 9 is a view similar to FIG. 7> after the thigh sections of the staple continue in the plate-shaped pieces have penetrated and assume an initial clamping position;

_ Zf _

50981 8/0317

- Zj. _

FIG. 10 shows a horizontal partial section essentially along line 10-10 of FIG. 9; and

11 is a view similar to FIG. 9 in which the Staple legs the full clamping position to staple the two plate-shaped workpieces together.

Reference will now be made in detail to the drawings, in which like reference numerals are used for like parts in all figures, the self-locking staple according to the invention shown in FIGS. 1-6 is designated 12 as a whole. The staple 12 has a transversely extending web section 14 and -Jc ^ enkelabsc ^ nitte 1_6 and 18, which they * - ¹ extend from the opposite ends of the web 14. The staple 12 is preferably made of metal flaxMraT-t. The sections of the legs 16 and 18 marked with the brackets A extend essentially in a straight line with their wider surfaces facing and aligned parallel to one another. The sections which project axially from the rectilinear sections are indicated by the brackets B in FIGS.

Particular attention is paid to the way how the sections B of the legs 16 and 18 are twisted, so that they lie in a plane that is essentially sic ^ extends at right angles to the plane of the sections A. The ftinc "wrestling the oc ^ grandchildren are denoted by U and offer a relatively ac'-arfe tip to prevent penetration into

509818/0317 _ß ^

a plate-shaped workpiece 20 to facilitate.

When force is exerted on the oteg 14, the entering C .der. legs 16 and 1 8 pressed into the plate-shaped workpiece 20. In the illustrated embodiment, the portions of the B-5c ^v grandchild in a common jiibene lie. With continued longitudinal movement of the sections B By J * - ^1, the plate-örmige workpiece 20 cause the twisted control surfaces of the portions B compared to the linear portions A, the initial clamping movement of the legs towards each other, as shown in Figure 4 is shown.. Continued movement of the -limb causes a further clamping movement until the final, in Fig. 6 "position shown has been reached by ö as workpiece. JSs should be noted that the staple as shown in Figures 2-6 also for clamping of two electrical lines 22 can be used on the surface of the plate-shaped workpiece 20. In some cases it may be of the nature to use Schul tern24 - to limit the extent of the leg penetration through the workpiece and thus to control the amount of pressure, which the web 14 exerts on the lines 22.

In FIGS. 7-11, a somewhat modified embodiment of an automatically locking staple is shown and designated as a whole by 12a. As can be seen the staple 12a does not have the aforementioned shoulders 24. The staple 12a is special in such cases Can be used when two plate-shaped workpieces are to be clamped together. Portions of the self-locking staple 12a similar to those previously described

S098 18/0317 ^8AD original

Corresponding to staples 12 are provided with corresponding reference numerals to which an "a" is appended. In the figures 1-6 a single workpiece is shown at 20, whereas in Figure 7 to 11, the workpiece consists of two plates lying on each _other. Is collectively showing the reference numeral 20a.

The initial attachment of the staple 12a to the workpiece 20a is the same as the previously described attachment of the staple 12, with the clamping movement of the legs 16a and 18a shown in Figures 7, 9 and 11 also being the same as the clamping movement of the legs 16 and 16 described above 18 of the staple 12 is. iäis should be noted that the web 14a of the staple 12a in the ünds Settin g at the upper i laugh of the workpiece 2üa applied and that the üestklemmbewegung the legs 1.6a and 18a is such that they clamp the two workpieces in the end position, such as this clearly in Jiig. 11 is shown.

Obviously, the one depicted in Ilguras 1-6 is self self-locking staples not limited to being used in conjunction with electrical wiring, in fact, the staple 12 can be used with equal ease to "clamp workpieces together." at the staple 12 would not necessarily have to have the shoulders 24 in such use. If the Staples 12 or 12a are initially applied, form the portions B of the legs which penetrate the workpiece Leg sections as shown in FIG. When the staple is driven into the workpiece again

509818/0317 -7-

2449558

become sections A of the legs through this initially formed slots. do a 90 ° V / inkel printed on the other hand. This arrangement serves to increase the frictional engagement with the workpiece, thereby reducing the locking effect of the Staple legs supported or relieved with the workpiece will. In that the web 14 shown in FIGS. 1-6 is provided with a central, arcuate section is, this is first on the surface of the "v'erkstücks attack. A continued IDin-

Driving pressure tends to level the 3teg, whereby the inclination of the staple legs makes it ¹ -! to move in fixed cycle direction, widen? increases. In cases in which materials such as fabric, paperboard or hardboard are to be clamped onto a relatively stiff support plate, the middle one exercises. Curvature of the web 14 has an important function. In your ¹ - ¹ provision of the aforementioned curved 3-web section, the initial contact with the weaker plate material takes place at a point that is at a distance from the entry points of the legs into the workpiece. As a result, the tendency for lighter or less solid material to be damaged or displaced is reduced to a minimum.

From the above it can be seen that the invention creates a se ^T -r economical and highly practical, self-locking staple. The use of flat metal wire together with the twisting of the legs about their longitudinal axis creates control surfaces which enable the legs to be automatically clamped to one another.

- 8 -.- ORIGINAL BATHROOM

5 09818/0317

when a force is exerted on the web of the clamp. Other modifications are without from the idea of the invention, such as it is expressed in the claims, deviating is possible,

509818/0317 - 9 -

Claims (7)

Patent claims 1.1 .oic ^ self-locking, made of metallic flat wire manufactured staple, which has an elongated rteg, which is formed in one piece with it at both ends, itself at right angles to it extending claws passes over, thereby characterized in that the legs (16, 18) close to the 'web have a substantially rectilinear extending portion (A), the wider, mutually facing surfaces run parallel to each other, and that the straight sections (A) axially protruding sections (B) of the .Jchenkel Twisted around its longest in such a direction are that the surfaces thereby formed when driving through a plate-shaped workpiece (20) an automatic Cause clamping movement of the legs towards each other. 2. staple according to claim 1, "characterized in that that the straight sections (A) axially protruding sections (B) of the .Tc ^ grandchildren (16, 18) in a common Longitudinal plane, which the Lägseben the rectilinear Cuts sections. 3. staple according to claim 2, characterized in that that the common plane of the straight cut-off sections (A) axially protruding sections (B) of the oc ^ grandchildren (16, 18) sicv> substantially at right angles to the longitudinal planes of the straight sections extends. 4. staple according to claim 1, characterized in that each leg (16, 18) in the Wähe of Gteges (14) 5 0 9 8 18/0317 ^ßAD original - 10 - _ 10- a straight section (A) and an axially protruding therefrom, has a workpiece-penetrating section (B) and an intermediate twisting section, welc ^ the latter forms a control surface when drifting through the leg through a workpiece (20) an automatic one jj'est clamping movement of the "leg causes. 5. staple according to claim 1, characterized in that that the free imden of the legs (16, 18) is the initial one penetrate into a workpiece (20) facilitating, have relatively sharp point. 6. staple according to claim 1, characterized in that that means (24) are provided which limit the depth of penetration of the legs (16, 18) into the workpiece (20). 7. staple according to claim 6, characterized in that the means of limiting the penetration depth of shoulders (24) are located in the Na ^ e of the web (14) are. 509818/0317 Blank page