DE8707875U1 - Double locking snap hook - Google Patents

Description

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PATENT ATTORNEYS ','·,,' ' ,'' ' ' ,' !

DIPL.|rt'Q, ft EICHUan

BRAHMSSTRASÖE 29, 5600 WUPPERTAL; H

Henssgen Karabinerhaken GmbH/ Schillerstr» 50/

5603 Wuelfrath

5 Double locking snap hook §

P The innovation concerns a double-locking Kara- |

Biner hook with a hook shaft with a rope or similar fastening eyelet at one end and a nose enclosing a hook mouth at the other end, a snap fastener with snap fastener spring arranged on it so that it can pivot and closes the hook mouth, and with a locking pawl with an actuating surface and locking pawl spring, which also has a pivoting mounting on the hook shaft and secures the snap fastener in its closed position.

Snap hooks with double safety of the above type are known. In these cases, the pivot pin for the snap is usually located near the hook eyelet, whereby the snap performs a corresponding inward swivel movement when the hook mouth is opened, in which its closing edge, which locks the hook mouth, swings into the hook mouth. In addition, snap hooks of the same type are also known in which

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where the snap is essentially L-shaped and is hinged to the end of the hook shaft that forms the hook mami; so that the "catch" with its leg closing the hook mouth opening performs an opening longitudinal movement that runs essentially peripherally to the hook mouth opening. All previously known double-locking snap hooks have in common that the locking pawl that secures the catch in its closed position must be pivoted with its actuating surface against the hook shaft in order to be released. To open the hook mouth, the catch and its locking pawl therefore each describe pivoting movements directed towards the hook shaft. This is particularly worrying with regard to the locking pawl pivoting movement, since if the rope accidentally wraps around the snap hook in the area of its locking pawl, this can lead to an unwanted release movement and at the same time to the catch pivoting in, thus to the unintentional exposure of the hook mouth and thus to the corresponding risk of accidents. Furthermore, with the known snap hook of the type in question has the disadvantage that the finger actuation of the snap catch required to open the hook mouth means that access to the exposed hook mouth is restricted by the actuating finger of the human hand, which makes it difficult to attach the hook, especially in unfavorable overhead positions*

The innovation is therefore based on the task of creating a double-locking snap hook of the generic type, which does not have the aforementioned defects, but rather ensures safe handling with a simple design and easy operation. This task is essentially solved according to the innovation by the locking pawl with its actuating surface being pivoted against the hook shaft by the locking pawl spring and away from the hook shaft to release. This ensures that the

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!The locking pawl cannot be accidentally swung into its release position by a rope that winds around the snap hook shaft. Rather, it is necessary in every case that the locking pawl is swung away from the hook shaft with its hand-operated surface.

According to a further advantageous feature of the innovation, the linkage bolts of the catch and pawl are arranged adjacently in the particularly bulbous center of the hook shaft, with the opening pivoting movement of the catch directed away from the hook mouth and running in the same direction as the emptying pivoting movement of the pawl. As a result, when the catch is opened, the hook mouth can be completely exposed at its access point, so that hooking or inserting a rope or even a double rope into the hook mouth is possible without any hindrance. At the same time, the opening and closing movement of the catch and pawl in the same direction ensures that even if the catch spring breaks, the catch is still held in its closed position by the pawl and its pawl spring.

The catch and the pawl advantageously consist of essentially U-shaped bent parts, the two legs of which fork-likely enclose the flat hook shaft on one and the other narrow side, with the web part of the catch facing the hook mouth and the web part of the pawl forming the actuating surface on the underside or end. The locking engagement between the catch and the pawl is advantageously achieved by having a notch on each of the leg edges of the catch facing the pawl, into which a locking lug on each of the facing leg edges of the pawl jumps in the locking position of the catch and the pawl.

Further features and advantages of the innovation are described using an embodiment shown in the drawing.

The double-locking snap hook shown in the side view has a flat hook shaft 1, preferably punched from thick-walled sheet steel, which has a nose I ¹¹ that surrounds a hook mouth 2 at one end I ¹ and a fastening eyelet 3 at its other end I ^111. This advantageously has the hat-shaped contour shown with the hat bottom edge 3 ¹ facing the hook end I ¹¹¹ , whereby the eyelet 3 is suitable for both rope and corresponding belt fastening.

IV In the central, slightly bulbous part 1 of the

Hook shaft 1 is pivotally mounted via adjacent pivot pins 4, the catch 6 closing the hook mouth 2 and the pawl 7 securing the latter in the closed position shown. Both the catch and the pawl 7 consist of essentially U-shaped bent parts, again in particular made of sheet steel. With their two legs 6 ¹ and 7 ¹ they grip the flat hook shaft in a fork-like manner on one and the other narrow side. The web part 6 ¹¹ of the catch 6 connecting the two legs 6' to one another faces the hook mouth 2 and forms its actual closing edge or surface. In contrast, the web part 7' ¹ connecting the two fork legs T of the pawl 7 with each other, with its underside or its projection 7 ^IV projecting slightly beyond the rounded fork leg circumference T'', forms the actuating surface for the pawl.

Both the catch 6 and the locking pawl 7 are held in their illustrated closed or secured position by U-shaped wire brackets § b2w, 9./ which are connected to it

Webs 8 ¹ and 9 ¹ are supported on the narrow side of the hook shaft 1 facing the hook mouth 2, are wound with their legs around the corresponding pivot pins 4 and 5 of the latch 6 and the pawl 7, respectively, and grip with their free leg ends 8 ¹¹ and 9 ¹¹ under and behind the web 6' ¹ and 7 ¹¹ of the latch 6 and the pawl 7, respectively.

There is a notch 6 on each of the leg edges 6 ¹¹¹ of the catch 6 facing the pawl 7, in the axis a locking lug 7 on the facing leg edges of the pawl 7 engages in the illustrated securing position of catch 6 and pawl 7. As a result, the catch 6 is securely blocked in its illustrated closed position by the pawl 7. Another advantage is that even if the catch spring 8 weakens, the catch 6 is still held in its closed position by the pawl spring 9 and the pawl 7.

In the two fork legs 6' of the latch 6 is outside

V, a finger recess 6 is provided which is congruent with one another. This ensures that the actuating finger, which allows the catch 6 to be pivoted into the open position against the action of the catch spring 8, leaves the access opening to the hook mouth 2 unconstricted and therefore does not hinder the hooking of one or more ropes.

To open the latch 6, the locking pawl 7 must first

IV can be pivoted into the unlocking position shown in dash-dotted lines by finger actuation on its actuating surface end 7, whereby its actuating surface 7' ¹ or the actuating end 7 has a direction directed from the hook shaft 1 v/eg

IV swivel movement. The locking lugs 7 move out of the release tabs 6 of the catch 6/ So that the latter

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by finger actuation in the finger recess 6 in the same way as the locking pawl 7 can reach the opening position, also shown in dash-dotted lines. In order to simplify the actuation of the locking pawl 7 and the catch 6, appropriate marking arrows 10 are advantageously provided on the outside of their fork legs, which give the user a clear indication of how to actuate these parts.

A significant advantage of the new snap hook is that the essentially U-shaped design of the snapper 6 and the pawl 7 with their respective upper web parts 6' ¹ and T' means that the spaces underneath are largely covered against dirt and are thus protected, thus preventing the snapper and pawl from becoming stiff. It is also clear that many modifications are possible within the scope of the innovation. For example, the snapper 6 and the locking engagement of the pawl 7 on it could be designed in such a way that the snapper 6 can also swing into the hook mouth if necessary after being released by the pawl 7 which is to be swung out, as is the case with known double-locking snap hooks. However, this would lead to a corresponding narrowing of the hook mouth 2 and also to a narrowing of its access opening by the actuating finger. Therefore, the illustrated pivoting opening movement of the latch 6 away from the hook mouth 2 deserves absolute preference.

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Claims (6)

PATENT ATTORNEYS «"■* PJPLfHW H. «&Pgr;&Igr;&Igr;«&Bgr; DIPL-ING. P. EICHLEFi BRAHMSSTRASSE 29, 5600 WUPPERTAL. 2 Protection claims: 1. Double-locking snap hook with a hook shaft having a rope or similar fastening eyelet at one end and a nose enclosing a hook mouth at the other end, a snap fastener with a snap fastener spring arranged pivotably thereon which closes the hook mouth, and with a locking pawl with an actuating surface and pawl spring which secures the snap fastener in its closed position and is also pivotably mounted on the hook shaft, characterized in that the locking pawl (7) with its actuating surface (7 ¹¹ ) can be pivoted against the hook shaft (1) by the pawl spring (9) and away from the hook shaft (1) for unlocking. 2. Snap hook according to claim 1, characterized in that the pivot pins (4, 5) of the catch (6) and the pawl (7) are arranged adjacently in the particularly bulbous center (1) of the hook shaft (1) and the opening pivoting movement of the catch (6) is directed away from the hook mouth (2) and runs in the same direction as the unlocking pivoting movement of the pawl (7). 3. Snap hook according to claim 2, characterized in that the snap (6) and the locking pawl (7) consist of parts which are bent essentially in a U-shape and which, with their two legs (6 ¹ and 7 ¹ ), fork-like surround the flat hook shaft (1) on one and the other narrow side, the web part (6 ¹¹ ) of the snap (6) corresponding to the hook mouth (2). -2- and the web part (7 ¹ ') of the pawl (7) forms its actuating surface under or at the end. 4. Snap hook according to claim 3, characterized in that the actuating surface (7 ¹¹ ) on the pawl (7) projects slightly beyond its rounded leg circumference (7 ¹¹¹ ). 5. Snap hook according to claim 3, characterized in that on the leg edges (6 ¹¹¹ ) of the catch (6) facing the pawl (7) each IV
a notch (6 ) is provided, into which each of the facing leg edges (7 ¹ '') of the pawl (7) IV
existing locking lug (7 j) springs into the locking position of the catch (6) and locking pawl (7). 6. Snap hook according to one of claims 1 to 5, characterized in that in the two fork legs (6 ^! ) of the snap (6) on the outside there is a congruent:
is provided. congruent finger grooves (6 ) Snap hook according to one of claims 1 to 6, characterized in that the snap catch and the pawl spring (8, 9) consist of U-shaped spring wire brackets which are supported with their webs (&' or 9 ¹ ) on the narrow side of the hook shaft (1) facing the hook mouth (2), are wound with their legs around the associated pivot pins (4 or 5) of the snap catch (6) or the pawl (7) and grip with their free leg ends (S' ¹ biw. 3'') under or behind the webs (6 ¹¹ or 7 ¹¹ ) of the snap catch (S) or the pawl (7). «I «· Mt« Il MIIMfI . i i II» II. I«*· · · &igr; 4 »ti Carabiner hook according to one of claims 1 to 7, characterized in ^that the hook eye (3) for optional self- or belt fastening is contoured in a hat-like manner, whereby the hat edge (3 ¹ ) faces the corresponding hook end ( ^{ír M} ),