EP2591972B1 - Securing element for a clamp lock for a points positioning system - Google Patents

Description

Field of the invention

The invention relates to a securing element for a tongue block of a clip closure for a points system.

State of the art

In a point setting system, two setting tongues are moved, depending on the given direction of travel, such that one of the two setting tongues is in contact with the associated stock rail, while the other setting tongue is located at a suitable distance, the so-called tongue surcharge, from the associated other stock rail. The simultaneous control of the point locks of a points setting system is done via a slide rod, which cooperates with closing clips and opens and locks the points closure. In a vertical clip closure, the closure clip is pivoted about a horizontal axis on a tongue block. The tongue block is also connected via a screw with the Stellzunge. In order to be able to precisely adjust the individual components of a point adjustment system as described above, it is known in the prior art to use the closure clip via an eccentric pin on the tongue block pivotally attach. The use of an eccentric bolt requires that the stroke of the eccentric pin can be adjusted in graduated steps via a suitable adjustment element, such as a dial. The exact position of the positioning tongue relative to the tongue block is designed adjustable. In order for the components to be checked during operation and, if necessary, readjusted, the setting components for switch locks must be easily accessible. However, this requires that the risk of contamination is given. Furthermore, high safety standards must be met. One of these is that the setting and fastening components in the area of the tongue block can not be released automatically. For this reason, a solution is sought to increase the reliability of the point setting system.

In the DE 547 034 C there is described a fuse element having two lateral vertical fuse portions extending downwardly from an upper cover portion.

From the EP 1 020 341 B1 a securing device for switch systems is known, which consists in the form of a formed of a metal plate fuse cap which secures the provided for connecting the adjusting tongue with the tongue clamp screw against automatic release.

That in the DE 24 00 628 A1 described fuse element represents the closest prior art.

Presentation of the invention

The invention has for its object to provide a securing element for a tongue block of a staple closure for a points system, which provides increased reliability of the point setting system even with high mechanical load and very long service life of the point setting system allows.

This object is achieved by a securing element having the features of claim 1. Preferred embodiments follow from the remaining claims.

The securing element for a tongue block of a staple closure for a points system comprises an upper cover portion with a securing portion for securing against unscrewing the tongue fastening screw between the adjusting tongue and tongue block, arranged substantially perpendicular to the upper cover, in the installed position substantially vertically oriented, and integrally with the upper cover formed side cover portion, and a first securing portion and a second securing portion, which are each arranged parallel to each other and formed integrally with the lateral cover portion. Each fuse portion is oriented perpendicular to the side cover portion and the upper cover portion and spaced from the upper cover portion, and each securing portion secures a bolt connection for attaching a locking bracket to the tongue block against accidental release.

By having the securing member having an upper cover portion, a side cover portion, and two securing portions, the adjusting components on the tongue block, namely, the tongue fixing screw for fixing the adjusting tongue and the bolt connection for securing the closing clip, can be prevented from falling out. Thus, all critical individual components are protected by the fuse element according to the invention. Since, in addition to the securing element, separate safety precautions for fixing the position of the tongue fastening screw and of the bolt for fastening the closing clip can be provided, the operational reliability of the point control system is considerably increased.

The fuse element has a double function in this regard. It is itself actively a protective function for the tongue fastening screw and the locking bolt, but fulfills the additional protective function that additional security elements can also be fixed in position. Another advantage of the securing element is the simple geometry which, according to a preferred embodiment of the invention, makes it possible to produce the securing element from a sheet-metal stamped part and to bring it into the desired shape by bending.

Preferably, the securing element consists of spring steel, which combines high hardness, strength and elasticity in itself.

According to a preferred embodiment of the invention, the securing element is dimensioned and designed such that the first securing area secures an eccentric bolt for fastening the closing clip on the tongue block against falling out. For this purpose, the first securing portion is designed so that the eccentric pin is prevented from axial movement opposite to the insertion direction during assembly. This can be done by a complete coverage of a widened head of the eccentric bolt or even by a positive connection with another element is produced, which in turn is positively connected to the eccentric pin. In the specific case, this may be a dial, which cooperates with the head of the eccentric pin to set a desired stroke within the existing adjustment of the eccentric bolt by a targeted, sectionwise rotation.

Preferably, the securing element is dimensioned and designed such that the second securing region secures against rotation an attachment nut fixed on an eccentric bolt for fastening the closure clip to the tongue clamp. This can be done by the second Secured area is provided with a star-shaped opening, which surrounds the fastening nut, so that at most a rotation of the fastening nut can be done in a very narrow and thus with respect to the unintentional release of the eccentric bolt safe angle range.

According to the invention, the upper cover area is dimensioned to fix a securing ring around the head of the tongue fixing screw in the vertical direction. Thus, in the clip fastener, there is provided an additional circlip around the head of the tongue-fixing screw, which is prevented from passing over the upper cover portion from engaging the head of the tongue-fixing screw in the vertical direction.

Preferably, the securing element further comprises a covering tongue in the region of the upper covering area, which secures a fixing screw provided for preventing the rotation of the securing ring from falling out. In cooperation with the above-mentioned dimensioning of the upper cover area, so that the circlip arranged around the head of the tongue fixing screw can not come out of engagement with the head of the tongue fixing screw in the vertical direction, a complete securing of the tongue fixing screw can be achieved in this way. The tongue fixing screw can not be rotated out of the tongue block in the vertical direction, as this prevents the upper cover portion of the securing element. Also, the tongue fixing screw can not be turned to any appreciable extent because the locking ring around the head of the tongue fixing screw is prevented from rotating by the fixing screw. In addition, the locking ring can not come out of engagement with the head of the tongue fastening screw in the vertical direction. Finally, the fixing screw for fixing the Circlip protected in the direction of rotation against falling out in the vertical direction by the cover in the region of the upper cover of the fuse element.

According to a preferred embodiment of the invention, the securing element further comprises an opening in the upper cover area, which is dimensioned and arranged so that in the installed position extends from the head of the tongue fastening screw upwardly projecting pin through the opening. In this way, the securing element is held in a particularly simple manner in the correct position.

Brief description of the drawings

Fig. 1

eine Explosionsdarstellung eines Zungenklobens und damit verbundener Bauteile in einem Weichenstellsystem darstellt. Um die einzelnen Bauteile und deren Funktion besser darstellen zu können, wurde bewusst das erfindungsgemäße Sicherungselement nicht dargestellt.

Fig. 2

zeigt eine erste Darstellung der erfindungsgemäßen Sicherungselements in Einbaulage in einem Weichenstellsystem;

Fig. 3

zeigt eine zweite Darstellung der erfindungsgemäßen Sicherungselements in Einbaulage in einem Weichenstellsystem; und

Fig. 4

zeigt das in den Figuren 2 und 3 dargestellte Sicherungselement mit Blick auf den oberen Abdeckbereich.

The invention will be described purely by way of example with reference to the accompanying drawings, in which

Fig. 1

an exploded view of a tongue block and associated components in a points system represents. In order to better represent the individual components and their function, the fuse element according to the invention was deliberately not shown.

Fig. 2

shows a first representation of the securing element according to the invention in the installed position in a point setting system;

Fig. 3

shows a second view of the securing element according to the invention in the installed position in a point setting system; and

Fig. 4

shows that in the FIGS. 2 and 3 illustrated fuse element overlooking the upper cover area.

Ways to carry out the invention

In the following figures, the same components are denoted by the same reference numerals.

In Fig. 1 a tongue block 10 is shown as well as some components associated with the tongue clamp. The tongue block 10 is usually designed as a casting. In the upper part of the tongue block 10 is a receiving slot 12 for the foot of the positioning tongue, the example in Fig. 2 shown and designated reference numeral 14. On both sides of the receiving slot 12 aligned bores 16 are provided for receiving a tongue fastening screw. The longitudinal axis of in Fig. 1 Tongue fixing screw, not shown, is substantially vertical in the installation position of the tongue block 10 on a positioning tongue.

In Fig. 1 Also shown is a closure clip 18, which has a fastening eye 20, by means of which the closure clip 18 can be fastened to the tongue block 10. An eccentric pin 22, which has an eccentric region 24 relative to its longitudinal axis, serves for this purpose. The eccentric bolt passes through the attachment eye 20 of the closure clip 18 and can be used with its eccentric region 24 by a targeted rotation for adjusting the closure clip 18. The eccentric pin 22 passes through mutually aligned receiving openings 26 on the tongue block 10 and in particular two legs of the tongue block, between which the closing clip 18 is arranged. To fix the eccentric bolt is a fastening nut 28, which is preferably carried out self-locking. Another security against falling out provides a Sicherungssplint 30 which is passed through the split opening 32 on the eccentric pin 22 and secured by bending against falling out.

In the region of the head of the eccentric bolt, a shim 34 is attached in a form-fitting manner, which is provided with a keyhole-shaped opening. The substantially round part of the keyhole-shaped opening 36 serves to be placed over the head 38 of the eccentric pin can. A subsequent displacement in the axial direction out of the substantially circular region of the opening 36 out fixes the locking washer 34 in a form-fitting manner in cooperation with the groove 40, so that the locking washer 34 is fixed in the axial direction of the eccentric pin and only together with the eccentric pin to the Longitudinal axis of the eccentric pin can be rotated around. The lock washer 34 is provided with a number of pin openings 42 which receive in the installed position with the fixing pin, which prevents rotation of the lock washer and, together with the lock washer of the eccentric pin.

In Fig. 1 is still a catch pin 46 shown, which is secured over the split pin 48 on an axial falling out and only has the function to enclose the existing in a conventional Weichenstellsystem slide rod below the closure clip 18, so that the tongue block is not up out of engagement with the slide rod can be moved out. However, the function of the catch bolt is irrelevant to the understanding of the present invention.

FIGS. 2 and 3 show in mounting position the fuse element 50 according to the invention, which consists of a stamped sheet metal, preferably made of spring steel, in the in the Fig. 2 to 4 is shown bent shape. The fuse element 50 consists of an upper cover portion 52, a side cover portion 54, which, as in Fig. 2 to 4 is shown, itself also again in different, at an angle to each other arranged sub-areas can be subdivided, as well as a first security area 56 and a second security area 58. The upper cover area 52 is in Installation position arranged substantially horizontally. The lateral covering region 54 extends substantially vertically and is connected in one piece with the upper covering region 52 via a bending region 60. The first securing region 56 and the second securing region 58 are each parallel to one another and are likewise arranged vertically in the installed position. The first securing region and the second securing region are each perpendicular to the lateral covering region 54, but are also perpendicular to the upper covering region 52. The first securing region 56 and the second securing region 58 are each integrally connected to the lateral covering region 54 via the bending seams 62 and 64. In the region of the first securing region 56 there is an opening 66, through which the head 38 of the eccentric pin 22 can pass. In the Fig. 1 Lock washer 34 shown, however, is covered by the first securing portion 56, so that the eccentric pin 22 is secured against slipping out in the axial direction. In the area of in Fig. 2 second securing portion 58 shown, the second securing portion 58 has a recess 68 which is arranged and shaped to prevent the fastening nut 28 from rotating. In addition, if a fastening nut 28, as in Fig. 1 shown, is used, ie, a fastening nut, which in addition has a circular flange portion, the over the circular flange arranged securing element 50 also represents an additional backup in the axial direction.

In Fig. 4 For example, the upper cover portion 52 of the fuse element 50 is shown. In the area of the upper cover area is the in Fig. 4 invisible tongue fastening screw, which is only partly in Fig. 4 visible circlip 70, which is arranged around the head of the tongue attachment screw and is prevented by a screwed into the Tongue-locking screw 72 is prevented from being accidentally loosened. The tongue fixing screw can thus not coming out of the tongue tab by the upper cover portion 52 disposed above in the vertical direction. A rotation is prevented by the retaining ring 72, which in turn is prevented by the fixing screw 72 from undesired rotation. As an additional security feature, a covering tongue 74 is provided which is arranged and dimensioned so that it presses elastically against the head of the fixing screw 72, so that the fixing screw can not be unscrewed upwards out of the tongue block.

In Fig. 4 a fixing pin 76 is shown in plan view, which extends from the head of the tongue fastening screw, not shown, upwards and extends through a dimensioned according to the dimensions of the pin receiving opening 78 in the region of the upper cover 52. The fixing pin 76 serves to position the securing element 50, so that in addition to the opening 66 for the head 38 of the eccentric pin in the region of the first securing portion 56 and adjacent to the recess 68 for positive reception of the fastening nut 28, a third fixing point is still present Secured fuse element 50 in position.

The locking plate thus fulfills a variety of tasks. It secures the eccentric pin against falling out, but also secures the shim of the eccentric bolt and furthermore also the self-locking fastening nut of the eccentric bolt against unscrewing. Finally, the securing element also protects against the ingress of dirt from behind and up in the switch clamp.

Claims (7)

1. Retaining element (50) for a tongue attachment (10) of a clamp lock for a points positioning system, comprising:

   - an upper covering region (52) with a retaining section for preventing the tongue fastening screw between positioning tongue (14) and tongue attachment (10) from coming unscrewed; and

   - a lateral covering region (54) which is arranged substantially perpendicularly to the upper covering region (52) and oriented substantially vertically in the fitted position, and constructed in one piece with the upper covering region (52);
   characterised in that
   the retaining element (50) further comprises:

   - a first retaining region (56) and a second retaining region (58) which are arranged parallel to each other and constructed in one piece with the lateral covering region (54); wherein

   - each retaining region (56, 58) is oriented perpendicularly to the lateral covering region (54) as well as to the upper covering region (52) and spaced apart from the upper covering region (52); and

   - each retaining region (56, 58) prevents a bolt connection (24, 28) for fastening a locking clamp (18) to the tongue attachment (10) from coming loose accidentally; and wherein

   - the upper covering region (52) is dimensioned to fix a retaining ring (70) round the head of the tongue fastening screw in the vertical region.
2. Retaining element (50) according to claim 1, characterised in that the retaining element (50) is made by bending a planar stamped metal portion.
3. Retaining element (50) according to claim 1 or claim 2, characterised in that the retaining element (50) is made of spring steel.
4. Retaining element (50) according to any of the preceding claims, characterised in that the retaining element (50) is dimensioned and shaped such that the first retaining region (56) prevents an eccentric bolt (22) for fastening the locking clamp (18) to the tongue attachment (10) from falling out.
5. Retaining element (50) according to any of the preceding claims, characterised in that the retaining element (50) is dimensioned and shaped such that the second retaining region (58) prevents a fastening nut (28) fixed to an eccentric bolt (22) for fastening the locking clamp (18) to the tongue attachment (10) from turning.
6. Retaining element (50) according to claim 1, further comprising a covering tongue (74) in the region of the upper covering region (52), which prevents a fixing screw (72), provided to prevent rotation of the retaining ring (70), from falling out.
7. Retaining element (50) according to any of the preceding claims, further comprising an opening (78) in the upper covering region (72), which is dimensioned and arranged such that in the fitted position a fixing pin (76) projecting upwards from the head of the tongue fastening screw extends through the opening (78).

Images