The invention is directed to a pin for an articulated connection or a hinge comprising two articulated pieces or hinge leaves having in each instance a cylindrical receiving space for a pin such as an articulated pin or hinge pin, which cylindrical receiving space is oriented coaxial to the joint axis or hinge axis, and wherein the articulated pin or hinge pin is formed of two parts.
A (screw-on) hinge which comprises two hinge leaves having in each instance a receiving space oriented coaxial to the hinge axis and a hinge pin is already known from the catalog “Main Catalog C 19”, page 4-250, by Dirak GmbH, Königsfelder Str. 1, 58256 Ennepetal. The hinge pin is formed by two separate partial pins which are held by helical compression springs and a screw penetrating the helical compression springs. This is a hinge with a grounding function and is therefore complicated and expensive to produce. On the same catalog page, there is also a hinge with a hinge pin that replaces the two partial pins and is provided with knurling which forms an interference fit in the receiving space. The hinge according to catalog page 4-326 can only be screwed on in disassembled condition. The customer is then responsible for inserting the knurled pin at the device cabinet. The hinge according to catalog page 7-220 can also only be screwed in discrete parts because the screw holes of the bracket are not accessible.
It is the object of the invention to provide other simpler and more economical embodiment forms of a hinge and hinge pin of the type mentioned above.
The above-stated object is met in that the inner end of the one pin part can be connected to the inner end of the other pin part by means of toothed engagement, hooking engagement or clipping engagement.
Hinge pins of this type serve to connect the two hinge leaves or hinge parts and the parts arranged at the latter to one another in an articulated manner. Mainly, knurled hinge pins which are pressed into the receiving space are employed for this purpose, but this arrangement causes problems. As a result of the knurling, the surface of the bore hole of coated die cast hinges (GdZn) is damaged by the knurling so that corrosion can occur. Further, pressed-in one-piece stainless-steel hinge pins are not perfectly vibration-proof and can be removed for purposes of tampering, for example, to open a cabinet and close it again by installing the hinge pin without it being noticed. Plastic pins have the advantage that in many cases they can be trimmed more easily than metal pins, but plastic pins can also not be fixed securely. A two-part pin is a possibility to be considered. This is true particularly when the two pin parts have the same shape and the same head. The head on both sides makes it clear that tampering is difficult or impossible and that it is vibration-proof.
Two-part pins made of plastic and having tongues which hook together can be installed easily manually, ensure good sliding properties and inhibit corrosion.
Corrosion-inhibiting hinges operate mostly with plastic bushings; then a partial pin is pressed in. However, this is expensive.
In summary, one-part pins have three drawbacks:
1. The pin must be pressed in.
2. The pin can fall out and is therefore not actually vibration-proof.
3. The one-part pin can be tapped out and is therefore not tamper-proof.
A two-part pin with a head or enlargement does not have these disadvantages.
To solve these problems, it is provided that the inner end of the one hinge pin part is connected to the inner end of the other hinge pin part by means of toothed engagement, hooking engagement or clipping engagement. Because it comprises two parts with opposed teeth, the pin can be made to form one part in that its ends are pressed in with these ends being pressed together. This can be carried out by providing a slanted surface with teeth or in that the slanted surface proceeds in each instance from a radially extending surface. It is advantageous when at least the outer end of the at least one hinge pin part forms a radially protruding collar, enlargement, round head or countersunk head.
The toothing can be formed in each instance by two saw teeth which proceed from a lateral surface of a hook. The plastic material with the resilient tongues enables manual assembly without tools.
According to a particular embodiment form, an individual tooth is formed in each instance by the hook. This particularly safeguards against vibration.
The pin in this instance has a head which forms a shoulder. The shoulder of the pin is supported against the central part of the hinge, which part is not accessible. The inaccessibility is made possible in that the head springs back and is supported on the central part of the hinge, the outer parts of the hinge being swivelably held by the heads of the pin parts.
A bushing can be arranged between the hinge pin and the outer hinge part. By inserting through, there results in the center of the hinge a free space into which (and out of which) the hooks may move. A disadvantage would be that the ends of the pin are not guided radially; therefore, it is advisable to choose a construction in which radial displacement is inherently prohibited.
This can be achieved in that the one inner end of the one hinge pin half forms a prism-shaped projection which can be received by a suitably shaped recess in the inner end of the other hinge pin half. This serves to prevent the hinge pin halves from rotating relative to one another in order to secure the hook connection. The hinge pin parts can be correspondingly inversely configured so as to be offset by 90°.
It may be advantageous to configure the hooks such that they narrow toward the end in order to provide space for deflecting during assembly.
It may be advantageous for the head to be shaped as a square so that the pin or pins reliably find the correct position when the square head is displaced.
The description also addresses a hinge or joint with a two-part pin which is characterized in that the hinge pins in assembled condition form a receiving space for a leaf spring which is bent in a V-shape and which is supported at end walls of the receiving space, which walls extend transverse to the pin axis, the free ends being supported on one side and the bend area of the V-shape being supported on the other side.
The invention will be described more fully in the following with reference to embodiment examples which are illustrated in the drawings.
The drawings show:
It is to be understood that the figures and descriptions of the present invention have been simplified to illustrate elements that are relevant for a clear understanding of the present invention, while eliminating, for purposes of clarity, many other elements which are conventional in this art. Those of ordinary skill in the art will recognize that other elements are desirable for implementing the present invention. However, because such elements are well known in the art, and because they do not facilitate a better understanding of the present invention, a discussion of such elements is not provided herein.
The present invention will now be described in detail on the basis of exemplary embodiments.
A hinge 10 constructed according to the invention is shown in a top view in
The situation is similar in the embodiment form according to
The embodiment form according to
According to the embodiment form of
An embodiment form in which two hinge pin halves are again hooked together is shown in a perspective view in
In this case, rotation is prevented in that the hook sides are guided snugly at the recess sides by a kind of claw coupling so that the tongue-and-groove joint is unnecessary in this case.
When the square 438 is displaced, the pin is (or pins are) securely in the correct rotational position.
Tests have shown that in a steel hinge with a pin diameter of 6 D, where D is approximately 6 mm, the radial height of the tooth base is 3.2 D and the tooth height is accordingly 0.4 D. The hinge bore hole amounts to 6.1 D, the hinge pin parts can be connected to one another in case corresponding pressure is exerted, and the hinge is at the same time easily movable so as to be swivelable around the hinge axis (see the specified measurements in
The divided hinge pin according to
After assembly, the hinge pin halves 624, 626 of the pin form a receiving space 76 for a leaf spring 74 which is bent in a V-shaped manner and which is supported at end walls 78, 80 and 82, respectively, (
The V-shape results in a slanted surface with respect to the pin axis 616 which, during assembly (inserting the two pin parts 624 and 626 together in the hinge bore hole or joint bore hole), is pressed back into space 90 by nose 88 until the leg of the V-shape forming the slanted surface is released and abuts in the corner of the cavity so as to support the pin part 624.
It may be advisable to fix a spring leg in the receiving space, e.g., by gluing the spring leg 88 to the base of the receiving space 76.
The invention is commercially applicable in switch cabinet construction.
While this invention has been described in conjunction with the specific embodiments outlined above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art. Accordingly, the preferred embodiments of the invention as set forth above are intended to be illustrative, not limiting. Various changes may be made without departing from the spirit and scope of the inventions as defined in the following claims
Number | Date | Country | Kind |
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20 2013 002 821.1 | Mar 2013 | DE | national |
The present application claims priority from PCT Patent Application No. PCT/EP2014/000651 filed on Mar. 12, 2014, which claims priority to German Patent Application No. DE 20 2013 002 821.1 filed on Mar. 25, 2013, the disclosures of which are incorporated herein by reference in their entirety.
Filing Document | Filing Date | Country | Kind |
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PCT/EP2014/000651 | 3/12/2014 | WO | 00 |