DE202010006050U1 - Safety device against loss after loosening a fixing - Google Patents

Abstract

Locking device, in particular screw lock, against loss after loosening a fixing element (9), in particular a screw (9), nut, a pin or the like, wherein the fixing element (9) for fixing a first component to be fixed (7) on a second component (8) is provided, wherein on the first component to be fixed (7) at least one securing sleeve (1) with a securing stop (5) for abutment of the dissolved fixing element (9) is provided, wherein the securing stop (5) on the second component ( 8) opposite side of the first component (7) is arranged, wherein the securing sleeve (1) has a contact surface (6) for the first component to be fixed (7), characterized in that the contact surface (6) of the locking sleeve (1) transversely considered to the longitudinal axis exclusively laterally next to a fixing head (11) is arranged.

Description

The The invention relates to a securing device, in particular a screw lock, against getting lost after releasing a fixing element, in particular a screw, nut of a pin or the like, wherein the Fixing element for fixing a first component to be fixed is provided on a second component, according to the preamble of Claim 1.

State of the art:

So far are in mechanical engineering numerous devices for securing against Loss of screws, nuts or pins etc. already known. Such fixing elements or screws are in general used to connect two components together. In general has a screw connection a the screw head opposite Nut for jamming two components on or the second, the screw head opposite Component has a thread, so that when tightened the second component pressed against the screw head and thus with the first Component is connected.

Around now to secure a screw against losing after loosening, is z. B. already known, opposite to the screw head End of the screw to squeeze the threaded end after assembly or laterally deform the thread, which, however, a complete disassembly of the screw is prevented. such Fuses have the disadvantage that they are not used in all cases are applicable.

About that In addition, it is already known as a security technique that in use a neck screw, this in a socket with a short threaded neck can be screwed. The socket serves as a carrier and is glued into the first, the screw head facing component. in this connection the recess or bore of the first component must be the dimensions be adapted to the socket. When loosening the screw connection can the thread of the neck screw in the shaft area of the socket dive, but suggests the threaded neck of the socket at. As a result, the neck screw is safe from losing too secured in the released position.

adversely is, however, that the screw head in the tightened state against the bush is pressed. For screw connections with high strength requirements Accordingly, the socket must have appropriate material properties. In addition, these sockets are generally like this designed such that these the component width of the first component in Substantially correspond, so that a restriction regarding the path length is predetermined when loosening the screws.

moreover is in this safety technology disadvantage that the socket before must be glued to the attachment of the screw in the first component. For a subsequent securing the screw against Loosen, the first component must be modified accordingly or (in disassembled state) are drilled. This is comparatively consuming.

Furthermore, in the publications DE 20 3006 006 688 U1 or DE 10 2007 058 041 A1 Secured fastener fasteners, wherein the fastener or the screw is secured by a projecting beyond the screw socket with end-side narrowing in the released state against loss.

The Screw can thus be moved along the socket shaft, until it hits the constriction at the free end of the bushing. At the opposite end of the socket, the bottom has a Hole on, through which the screw shaft is inserted through. Press in the assembled or tightened state of the screw the wider screw head the socket bottom and thus the socket or their contact surface against the corresponding component.

Also here is disadvantageous that the pot-shaped fuse socket already be installed before mounting the screw. moreover the screw is only against losing in relation to the safety socket secured, since after loosening the screw this only with the socket is connected, but no longer connected to the component is. This is for some security-related use cases not allowed due to legislation. Here must the screw remain on the component.

Object and advantages of the invention:

task the invention is, in contrast, a safety device, in particular to propose a screw lock, which has the disadvantages of the prior art at least partially eliminated, in particular also suitable for safety-relevant applications.

These Task is, starting from a safety device of the introductory mentioned type, by the characterizing features of the claim 1 solved. By the mentioned in the dependent claims Measures are advantageous embodiments and developments the invention possible.

Accordingly is a securing device according to the invention characterized in that the contact surface of the locking sleeve considered exclusively transverse to the longitudinal axis is arranged laterally next to the fixing head.

Herewith a safety sleeve is realized, which is essentially over arranged the head of the fixing or the screw head on the first component is or can be attached. At the same time by the inventive Formation of the contact surface, d. H. exclusively in addition to the fixing head, allows the inventive Retaining sleeve subsequently, d. H. after attaching of the fixing element or of the screw, via the fixing element or the screw or its head can be slipped. Accordingly, retrofitting can be ordinary Screw connections or the like by means of the securing device according to the Invention can be realized. This means a considerable increase the possible use cases for attaching a Secured against loss after loosening a fixing element.

Across from the state of the art socket, which in the part or its recesses is glued, there is the advantage that the material of the invention Locking sleeve is freely selectable or no high Strength / stability requirements are sufficient got to. Accordingly, as the material for the invention Safety sleeve, for example, cheap metals or commercial (Duroplast) plastics or the like can be used. The production the securing device according to the invention by means of Injection molding ensures a particularly economical favorable realization, especially in large ones Quantities and in different dimensions possible.

As a general rule can be the length of the shaft and / or the clear cross section or diameter of the sleeve or of the shaft to the fixing element or adapted to the fixing head in an advantageous manner. For example is the clear cross-section of the stem to the standardized Dimensions of (metric and / or hexagon / allen) screw heads customized. Accordingly, accordingly standardized Secured device according to the invention realized become.

Preferably is the sleeve cross section / diameter of the locking sleeve greater than the cross section / diameter of the fixing element or of the fixing head. This ensures that the Safety sleeve or the invention Safety device later on the fixing or the fixing head can be attached.

advantageously, corresponds to the clear cross section / diameter of the contact surface essentially the clear sleeve cross-section / diameter of the Securing sleeve. In contrast to the prior art, wherein a (pot-shaped) socket a bottom or a constriction has the corresponding shaft, the securing device according to the Invention or the locking sleeve a sleeve shaft on, in the area of the contact surface no relevant narrowing having.

Much more the safety stop of the locking sleeve is more advantageous Way at the contact surface opposite Front side of the shaft arranged. This means that the solved Fixing element or the loosened screw with the head lengthwise the shank of the locking sleeve is adjustable until the Fixing element or the screw on the front side or at the end of Safety shaft strikes.

As a general rule is achieved by means of the invention that the dissolved Screw is held on the first component and the second component Removable from the first component. This is for example in safety-relevant Covers or the like of particular advantage. Accordingly beats the fixing head or the screw head on the one hand at the stop of the locking sleeve according to the Invention on the other hand, in the opposite direction on the first Component itself, d. H. at the edge of the recess or bore for the screw or for the fixing element. So that's it Fixing element or the screw even in the released state safely and permanently secured against loss on the first component.

In a particular embodiment of the invention, the locking sleeve a contact pad comprising the contact surface, wherein the contact web across to a longitudinal axis of the locking sleeve over this protrudes. In such a projecting contact web is achieved on the one hand increases the contact surface is and on the other hand is hereby possible that the locking sleeve according to the invention, for example with the aid of a corresponding shape on the first component can lock or can form a liquid compound. With the help of a such liquid compound is a secure fixation the locking sleeve on the first component and thus an effective Secure the fixing element against loosening on the first component guaranteed.

Preferably, the contact surface is an adhesive surface. Especially when using a widened or over the securing sleeve or the securing shank protruding contact web is achieved that increases the contact surface of the locking sleeve according to the invention and thus the adhesion is improved. This is both in the use tion of plastics as well as a safety sleeve made of metal advantage.

As a general rule can the locking sleeve both metallic first components glued with or without coating or paint or the like become. For this are already numerous, most diverse Glue for appropriate materials or material combinations available and already widely used in mechanical engineering.

Preferably an outer diameter of the contact web is larger as a diameter of the locking sleeve. With help of a Such broadened contact bridge with respect to the safety shaft or to the locking sleeve is achieved that as before mentioned an advantageous connection with positive engagement feasible is. In addition, there will be an improvement in stability reached the locking sleeve. This can, for example, a realized comparatively thin-walled safety shaft be, with the help of such, in particular annular Contact bar is stabilized or stiffened.

advantageously, the locking sleeve has at least one opening on. An opening can have different functions or Realize tasks. For example, through the opening a safety check or visual check is carried out, whether the screw or the fixing element is present.

preferably, is the opening as a tool outlet for the Assembly or disassembly of the fixing formed. Especially at the use of screws or the like as a fixing it is advantageous that with a tool access, d. H. by means of the advantageous opening, the fixing or the screw is available. For example, the opening is in use a hexagon bolt on the side of the locking sleeve or to arrange the safety shaft in an advantageous manner. hereby becomes an access of a wrench to the hex screw head guaranteed.

In front especially when using an Allen screw, slotted or Phillips screw, Spax screw or the like is the tool passage or the Opening according to the invention in an advantageous Way on the front side of the locking sleeve or the safety shaft to arrange. This is a simple operation of the fixing or the corresponding screw possible. Not just the dismantling the fixing or the fixing screw, but also the reassembly Fixation is thus easy to accomplish.

Preferably is the opening as a control window to control the Fixing formed. In addition to the opening as a tool passage can also a separate opening or several separate openings provided as a control window according to the invention become. In general, these control windows can be smaller be realized as a tool passage, so that, for example on the safety sleeve or on the safety shaft several, smaller openings may be present without the stability of the locking sleeve according to the invention is impaired.

advantageously, is the opening as a drain opening for draining formed by liquids. This has the advantage that in applications with liquids, for example in machine tools with oil lubricating fluid, also an ingress of liquids or oil lubricants in the locking sleeve according to the invention does not lead to a disadvantage. Rather, can penetrated Drain the liquid again. This is special even with a penetration of water of great advantage, for example, an oxidation or rusting of a metallic Fixing element to be kept within limits or to avoid.

Preferably the drain opening is formed as the control window. Reduced with this dual function of corresponding openings the effort for the realization of an inventive Securing device.

In stark contrast to the prior art according to the DE 10 2007 058 041 A1 Although in a particular embodiment of the invention, the safety device may also be cup-shaped, but the sleeve according to the invention or "pot" not with the "pot bottom", but just vice versa, in particular with the "pot collar", arranged on the first component or is fixed.

in principle the security device for different or Diverse applications are provided. Especially the subsequent attachment of the security device or securing sleeve to the first component already fixed or mounted fixing allows novel or special applications compared to the security devices according to the prior art. For example, two Components or components with the fixing or a screw firmly connected and then only the inventive Safety device are attached.

Especially in systems or machines such as machine tools, etc. with numerous screws or the like, this is particularly advantageous. The corresponding system or machine, such as machine tool or the like, can be mounted in a conventional manner or kom be pletted and at the end of the assembly, the locking sleeve according to the invention can be subsequently attached or glued at numerous points or screw connections. For the adhesion of corresponding securing sleeves according to the invention, no highly qualified training is required, so that this can also perform less qualified employees.

From particular advantage is the safety device according to the Invention for so-called. Separating protective devices or fixed standing guards according to the Machinery Directive 2006/42 / EC. Under separating guards is in mechanical engineering or in this machinery directive a machine part understood that provides protection by means of a physical barrier. These machine parts are specially designed and used to fulfill a protective function. Other Machine parts, z. B. the machine frame, the priority is an operational Function, can also fulfill a protective function, However, they are generally not referred to as so-called separating guards.

Much more separating guards are defined as facilities, the protection by means of a physical barrier, like a housing, a protective shield, a cover, a screen, a door, a Enclosure or fencing offer. The word "physical Barrier "implies that a protective divider made of a solid material such as steel or plastic, the is selected according to the required protection. The used Materials can be closed or perforated as well as stiff or be flexible.

separating Guards are among the facilities with which access to dangerous areas in the machine or around the machine can be locked. In many Cases, the separating protective device acts as a barrier in both directions to protect against two dangers simultaneously. Thus, a separating guard can be mounted so that It prevents people from accessing the danger zone at the same time the people around the machine in front of flying objects, Noise emission, radiation or dangerous substances protect.

According to the previously mentioned Machinery Directive, the fasteners Fixed protection devices only with tools solved or be accepted. The fixing elements or fasteners must after removal of the protective devices with the Protective devices or remain connected to the machine, d. H. with the first component according to the invention. Thus, it is clear that a safety device according to the Invention for such applications in particular Way is suitable and at an economically favorable Implementation of the aforementioned machinery directive leads.

Embodiment:

One Embodiment of the invention is in the drawing and will become more apparent from the figures below explained.

in the Individual shows:

1 a schematic, perspective view of a locking sleeve according to the invention,

2 a schematic sectional view of a locking sleeve according to the invention in the application with a screw to be secured and

3 a locking sleeve according to 1 in plan view.

1 schematically shows a locking sleeve 1 with a frontally arranged mounting opening 2 for a tool, eg. B. for a Allen key. The locking sleeve 1 includes a shaft 3 , a contact bridge 4 as well as a stop 5 or a sleeve bottom 5 ,

The over the shaft 3 or the sleeve 1 protruding contact bridge 4 includes a contact surface 6 , in the assembled state according to 2 the contact with a first component 7 forms.

The first component 7 comes with a second component 8th by means of a screw 9 with Mother 10 connected or screwed. How out 2 becomes clear, in the assembled state, a screw head 11 the screw 9 (possibly via a washer, not shown, or the like) directly against the first component 7 pressed. This is an essential difference from the prior art cited above, which discloses securing sleeves which are located between the head 11 and the first component 7 be trapped.

The locking sleeve according to the invention 1 on the other hand has a clear diameter or cross section in the area of the contact surface 6 or the contact bridge 4 slightly larger than the diameter or cross section of the screw 9 or the screw head 11 is. This allows the locking sleeve 1 according to the invention subsequently or after the attachment of the screw 9 on the first component 7 be fixed.

The fixation of the locking sleeve 1 on the first component 7 is preferably done by means of a bond, ie the contact surface 6 the locking sleeve 1 is as adhesive surface 6 educated. Alternatively, a weld can be provided to the securing sleeve even with a suitable material selection / combination 1 with the first component 7 effectively connect.

Especially from 2 it becomes clear that the loosened screw 9 can not be lost. The loosened screw 9 beats at the stop 5 or at the bottom of the case 5 on and can not through the mounting hole 2 go through it. In the opposite direction is the screw 9 ensured by the fact that the screw head 11 on the first component 7 strikes and can not go through the hole. Thus, the dissolved screw 9 effective and safe inside the locking sleeve 1 captured.

Due to the advantageous contact bridge 4 becomes the contact surface or the adhesive surface 6 advantageously increased, so that the adhesion is improved.

In addition, the locking sleeve 1 a section 12 on, in which the contact bridge 4 not available. Ie. the contact bridge 4 does not extend over the entire circumference of the locking sleeve 1 , With the advantageous embodiment of the section 12 According to the illustrated embodiment, it is possible that the safety sleeve 1 can also be positioned in places where the first component 7 a projection or a survey or the like. This extends the application possibilities for a safety sleeve 1 according to the invention, especially in confined spaces.

Furthermore, the locking sleeve 1 openings 13 on, on the one hand, an optical visual inspection can take place. On the other hand, this may possibly in the locking sleeve 1 Penetrating liquid or dust or dirt escaping or drain. This is of particular advantage in machine tool applications, for example.

1

securing sleeve

2

opening

3

shaft

4

web

5

attack

6

contact area

7

component

8th

component

9

screw

10

mother

11

screw head

12

section

13

opening

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 203006006688 U1 [0007]
• DE 102007058041 A1 [0007, 0030]

Claims (11)

Safety device, in particular screw lock, against loss after loosening a fixing element ( 9 ), in particular a screw ( 9 ), Nut, a pin or the like, wherein the fixing element ( 9 ) for fixing a first component to be fixed ( 7 ) on a second component ( 8th ) is provided, wherein on the first component to be fixed ( 7 ) at least one safety sleeve ( 1 ) with a safety stop ( 5 ) for striking the dissolved fixing element ( 9 ) is provided, wherein the safety stop ( 5 ) on the second component ( 8th ) opposite side of the first component ( 7 ) is arranged, wherein the safety sleeve ( 1 ) a contact surface ( 6 ) for the first component to be fixed ( 7 ), characterized in that the contact surface ( 6 ) of the locking sleeve ( 1 ) viewed transversely to the longitudinal axis exclusively laterally next to a fixing head ( 11 ) is arranged. Securing device according to claim 1, characterized in that the clear cross section of the contact surface ( 6 ) substantially the clear sleeve cross section of the locking sleeve ( 1 ) corresponds. Safety device according to one of the preceding claims, characterized in that the contact surface ( 6 ) an adhesive surface ( 6 ). Safety device according to one of the preceding claims, characterized in that the safety sleeve ( 1 ) one the contact area ( 6 ) comprehensive contact bridge ( 4 ), wherein the contact bridge ( 4 ) transverse to a longitudinal axis of the locking sleeve ( 11 ) protrudes beyond this. Safety device according to one of the preceding claims, characterized in that an outer diameter of the contact web ( 4 ) greater than a diameter of the locking sleeve ( 1 ). Safety device according to one of the preceding claims, characterized in that the safety sleeve ( 1 ) at least one opening ( 2 . 13 ). Safety device according to one of the preceding claims, characterized in that the opening ( 2 . 13 ) as a tool passage ( 2 ) for the assembly or disassembly of the fixing element ( 9 ) is trained. Safety device according to one of the preceding claims, characterized in that the tool passage ( 2 ) on a front side ( 5 ) of the locking sleeve ( 1 ) is arranged. Safety device according to one of the preceding claims, characterized in that the opening ( 2 . 13 ) as a control window ( 2 . 13 ) for controlling the fixing element ( 9 ) is trained. Safety device according to one of the preceding claims, characterized in that the opening ( 2 . 13 ) as drain opening ( 2 . 13 ) is designed for draining liquids. Safety device according to one of the preceding claims, characterized in that the drainage opening ( 2 . 13 ) as the control window ( 2 . 13 ) is trained.