RU2271426C2 - Cable lock - Google Patents

Abstract

FIELD: ironmongery, particularly locks giving indication of unauthorised unlocking having destructible seal closures or paper closures.

SUBSTANCE: cable lock comprises cable part fixed by the first end thereof and locking mechanism put on free cable end. The locking mechanism comprises hollow body with inner surface, bottom, flap, spring-loaded spacer and fixing members arranged in spacer seats. The fixing members are rollers and cooperate with inner body surface and cable part during lock closing. The body, the flap and the spacer have orifices for cable part receiving. Spacer orifice is provided with two symmetric diametrically opposite projections extending transversely to axes of roller rotation. The projections are located from front spacer wall side. Seats are made in spacer so that the rollers are restricted from swiveling in the spacer and have trapezoid lower parts. Two opposite faces of inner body surface are parallel; another faces are inclined one towards another.

EFFECT: increased efficiency.

3 cl, 7 dwg

Description

The invention relates to locking devices designed to protect the doors of containers, railroad cars, tank hatches, helm hopper controls, etc. from penetration to the cargo carried by unauthorized persons or intruders.

Known cable locking and sealing device (1), containing a cable, rigidly fixed at one end, and a locking mechanism worn on the free end of the cable, consisting of a housing with an internal cavity, consisting of sections with a conical and cylindrical surfaces, a lid, one-piece connected to the housing , a spring-loaded separator and fixing elements protruding from the separator and protruding from it, interacting when locked with the inner conical surface and the cable.

A disadvantage of the known device is its insufficiently high resistance to unauthorized opening. So, with repeated twitching of the cable, the cable cannot slip in the zone of contact with the balls. And this, ultimately, can lead to the pulling of the cable from the locking mechanism, i.e. the possibility of unauthorized opening of the device is not excluded. In addition, the device has a relatively large number of parts, because in addition to three balls mounted in a separator, it has a pusher, an emphasis, etc.

A device (2) is known, comprising a cable and a locking mechanism worn on the free end of the cable. A groove is made in the walls of the housing from the side of its conical surface along the generatrix of the housing, which is designed to accommodate the element fixing the cable in it. This element clamps one end of the cable between the conical surface of the housing and the separator housed in it. A groove in the housing prevents the separator from turning relative to the housing when attempting to fold the device.

However, the device does not guarantee against unauthorized opening due to the radial clearance between the cable and the cylindrical generatrix of the hole for the cable in the separator. Additional manufacturing of grooves in the housing, ensuring their parallelism with each other in order to avoid jamming of the rollers should also be attributed to the disadvantages of the device.

The technical result of the device is to create, on the one hand, a reliable, and, on the other hand, a structurally simple and economically inexpensive locking device, since it cannot be reused. The latter requirement excludes the possibility of fraud and secondary use of device elements by unscrupulous persons.

The specified technical result is achieved by the fact that in a cable locking and sealing device containing a cable, rigidly fixed at one end, and a locking mechanism that is worn on the free end of the cable, consisting of a housing with an inner surface, a bottom, a cover, a spring-loaded separator and placed in the separator seats fixing elements made in the form of rollers interacting when locked with the inner surface of the housing and the cable, while the bottom, cover and separator with front and rear walls have the hole for the cable, the hole in the separator from the front wall side is made with two symmetrical diametrically arranged protrusions axially perpendicular to the axes of rotation of the rollers, while the seat seats in the separator are made so that the rollers do not unfold in the separator, while in the lower part of the socket are made trapezoidal, and two opposite faces of the inner surface of the housing are parallel, and two other opposite faces are located at an angle.

In addition, the distance between the protrusions is equal to or slightly less than the distance between the oppositely located hollows of the cable.

In addition, the locking elements themselves, made in the form of rollers, can be provided with annular, prismatic protrusions.

An analysis of the known technical solutions in the studied area allows us to conclude that there are no signs in them that are similar to the essential distinguishing features in the claimed device, and to recognize the claimed solution meets the criterion of "inventive step".

The invention is illustrated below by way of example:

figure 1 shows a General view of the device;

figure 2 is a locking mechanism without a cable, a longitudinal section;

figure 3 is a section along aa in figure 2;

figure 4 is a view from the bottom;

figure 5 is a view from the side of the cover;

figure 6 is a cross section of a cable along BB in figure 1;

7 is an enlarged view of the front of the separator.

The cable locking and sealing device consists of a piece of cable 1 and a locking mechanism 2 put on the free end of the cable, consisting of a housing 3 with an inner surface closed by a cover 4 and having a bottom 5, the cover and the bottom being inseparably connected to the housing, for example, by rolling. The inner surface of the housing 3 is made with four faces (according to the graphic image in the drawings), the two opposite faces 6 are made parallel, and the other two opposite faces 7 are located at an angle, while the angle α is between 18-30 °. Facets 7 are workers.

Inside the housing 3 there is a separator 8, spring-loaded from the side of the cover 4 by means of a spring 9. In the bottom 5, the separator 8, having a front 10 and a rear 11 of the wall and a cover 4, coaxial holes 12, 13 and 14 are made, respectively. In this case from the front wall 10 in the separator opening 13 formed with two diametrically positioned perpendicular to the axes of rotation O-O rollers 15 projections 16. The distance between the protrusions l _height equal to or slightly less than the distance between opposing troughs l _ch cable, i.e. l _height ≤l _ch. The protrusions 16, thus, almost completely cover the radial clearance between the cable 1 and the hole 13 in the front wall 10 of the separator 8 and thereby prevent the penetration of any object to the rollers 15. That is excludes the possibility of penetration of objects of small thickness, but relatively sufficient rigidity between the cable and the forming surfaces of the protrusions, and therefore, between the cable and the rollers. In the opposite case, these objects, perceiving the load of the rollers, release the cable from penetrating the rollers in its locks, and with repeated twitching of the locking mechanism with subsequent scrolling, the possibility of twisting the locking mechanism from the cable is not excluded.

In the separator 8, mounting nests are made, while in the lower part 17 of the rollers 15, the nests are trapezoidal, and in the upper part 18 they are made in such a way that the rollers do not rotate in the separator. Such combined use of the nests eliminates the possibility of a roller turning in the seat socket and at the same time allows the cylindrical generators of the rollers to be brought closer to the cable.

One end of the cable is fixed in the hole 19, made in the tide 20 of the housing 3. The fastening is made mainly by crimping. The free end of the cable 1 has a working pointed end 21 for more convenient threading it into the holes.

The cable locking and sealing device is used as follows: the cable 1 is passed through the eyes of the locking unit and the locking mechanism 2 is put on its free end. The pointed end of the cable 21 passing through the hole in the bottom 5 of the housing 3 and the hole 13 of the separator front wall 10 rests against the in this hole the locking elements are rollers. The separator 8 under the action of this force compresses the spring 9 and moves in the inner cavity of the housing 3 from the section 22 with a smaller cross section to the section 23 with a larger one, while the separator contacts the parallel faces with the side faces 6. The fixing elements-rollers 15 exit from the hole in the separator, freeing the passage of the cable 1 into the hole 14 of the cover 4. Moreover, the rollers do not rotate in the separator, which provides easy movement of the rollers along the working faces 7 of the inner surface of the housing.

After the loop of the cable is selected and the locking mechanism 2 approaches the eyes, the latter is slightly pulled back. The annular protrusions 24 of the prismatic shape with which the rollers 15 are provided are slightly immersed in the cable. When you try to force extraction of the cable 1 from the locking mechanism 2, it captures rollers under the action of friction forces, which, together with the separator 8, passing from the section 23 with a large cross section of the internal cavity of the housing to the section 22 with a smaller cross section, begin to lock the cable 1 with greater force Moreover, the greater the force exerted on the cable 1, the further the locking elements-rollers together with the separator move to the side with a smaller cross-section of the inner cavity of the housing 3, the lower the rollers fall inward Stia separator 8, and the more they immobilized a cable.

Exclusion of spinning rollers, i.e. unauthorized opening of the device is ensured, as already mentioned, by the protrusions 16, which are made on the side of the front wall 10 of the separator 8 in the hole 13, which overlap the radial clearance between the cable 1 and the said hole.

In a preferred embodiment of the invention, various changes may be made regarding the shape, size, type and arrangement of elements within the essence, as well as the scope of the invention defined by the claims. In particular, the housing can be made all-metal (in the form of a glass), the rollers are grooved, and the cable segment is rigidly fastened with a tip (no additional detail is shown on the drawings), on which information with an individual device number, railway code, year can be applied issue and trademark.

Information sources

1. US patent No. 3994521.

2. RF patent No. 2132575.

Claims (3)

1. A cable locking and sealing device containing a cable rigidly fixed at one end and a locking mechanism put on a free end of the cable, consisting of a housing with an inner surface, a bottom, a cover, a spring-loaded separator and fixing elements protruding from the separator seats and protruding from it made in the form of rollers interacting when locked with the inner surface of the housing and the cable, while the bottom, cover and separator with front and rear walls have holes for the cable, characterized by we note that the opening in the separator from the front wall side is made with two symmetrical projections protruding diametrically perpendicular to the axes of rotation of the rollers, while the seats in the separator are designed so that the rollers do not rotate in the separator, while in the lower part of the socket they are made trapezoidal, and two opposite faces of the inner surface of the housing are parallel, and two other opposite faces are located at an angle. 2. The device according to claim 1, characterized in that the distance between the protrusions is equal to or less than the distance between the oppositely located hollows of the cable. 3. The device according to claim 1, characterized in that the rollers are provided with prismatic annular grooves.

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