RU53822U1 - DEVICE FOR LAYING ELECTRICAL CABLES - Google Patents

Abstract

The utility model relates to the field of electrical work, namely, devices for the open laying of electric cables in industrial, electrical and other premises, and in special cable structures or outdoor installations, more precisely, to nodes made in the form of a console connected to a rack. A feature is that the proposed device is simple in design, technologically advanced and reliable in operation. A device for laying electric cables, comprising a U-shaped stand with a base and side walls that have openings, and at least one U-shaped stand with two symmetrical openings on its side walls, intended for mounting the console with the stand, moreover, on the side walls of the rack, the holes are made round and proportionate in diameter to the holes in the side walls of the console, which are oblong with straight parallel sides and are inclined from the console flanges to the rack wall, and through these holes and holes in the side walls of the rack, an element for attaching the console to the rack in the form of a bolt or stud is passed, while the said elongated holes on the side walls of the console have rounded end sides, and their angle of inclination from the rack wall to the console shelf is 28-32 °.

Description

The utility model relates to the field of electrical work, namely, devices for the open laying of electric cables in industrial, electrical and other premises, and in special cable structures or outdoor installations, more precisely, to nodes made in the form of a console connected to a rack.

Devices for laying electrical cables contain racks mounted on walls or other supports, consoles (shelves) attached to racks, the bearing surfaces of which are designed to accommodate cables, as well as trays, boxes, profiles, etc. Racks with consoles should provide mechanical strength under loads and a reliable electrical connection.

Known devices in which the consoles have protrusions of various shapes that are inserted during installation into the corresponding holes in the rack.

It is known, for example, a device (Copyright certificate No. 337875, published 05/05/1972, Bulletin No. 15), in which the holes. located on two sides of the base of the U-shaped rack, equipped with guides with inclined ribs, and the console has protrusions made with a conical lateral surface formed by the continuation of the sides of the console, which are pulled to jam over the ribs.

A device of this type does not provide a sufficiently reliable contact between the console and the rack, has a complicated design, which leads to increased complexity in the manufacture and installation, as well as to costlier devices. This is due to the small size of the fastening elements of the cable rack shelf, since the latter under the influence of significant vertical and horizontal loads arising in cable structures can be deformed and do not provide mutual electrical connection.

A prototype device is known (Author's certificate No. 1297151, published March 15, 1987, Bulletin No. 10), which contains a U-shaped rack with a base and sides, holes are made on the base for attaching the rack to the building base, and holes on the sides are U-shaped inclined corrugations connecting the holes with the edge of the side walls of the rack, the width corresponding to the size of the hole. The console is a U-shaped profile with a variable height in length and with holes on the parallel side walls, coaxial with the holes of the rack, and has a T-shaped mounting element at the end of the carrier plane, for which the corrugations are guides for the console to contact the rack. The distance between the inner surfaces of the mirrored corrugations is greater than the distance between the edges of the console. The distance between the outer surfaces of the side walls of the console is less than the distance between the inner surfaces of the side walls of the rack.

The device allows pre-assembly in production, however, it requires accuracy and complexity in the manufacture and installation, thereby complicating the design and increasing its cost, since there are not only U-shaped inclined corrugations, but also T-shaped elements at the console. In addition, reliable fastening of the shelf to the rack is not provided, which does not make it possible to achieve sufficient mechanical strength (due to the presence of additional inclined slots) and the required electrical contact.

The proposed device solves the problem of simplifying and cheapening the structure while increasing mechanical strength and improving electrical contact.

The tasks are solved by a device for laying electrical cables, containing a U-shaped rack with a base and side walls. which have openings, and at least one console of a U-shaped profile with two symmetrical openings on its side walls. intended for mounting the console with the rack, and, on the side walls of the rack, the holes are made round and proportional in diameter to the holes in the side walls of the console, which are oblong with straight parallel sides and are inclined from the console shelf to the rack wall, and through these holes and openings an element of fastening the console to the rack in the form of a bolt or a pin was made in the side walls of the rack, while the said elongated holes on the side walls of the console have rounded end sides, and their angle of inclination from the rack wall to the console shelf is 28-32 °.

Such a new technical solution with its entire set of essential features allows us to achieve the following technical result, namely:

- to obtain a simplification of the design, as it has a pair of parts with a simple implementation of the connection form and bolted connection through the holes;

- to simplify the manufacturing technology, since the parts themselves are simple to manufacture, for example, a U-shaped stand - a supporting structure that is attached to the wall of the structure through its holes has usual holes on the sides, but the U-shaped console has oblong on its sides openings at an angle of alpha within 28-32 degrees to the horizon, which allows you to quickly and easily make a structure, quickly connect it to the rack and give the rack a perpendicular position, which is facilitated by the angle alpha;

- due to the mentioned angle, it is possible not only to give the console a perpendicular position in the rack, but also to ensure proper grounding of the structure, i.e. create the necessary electrical contact, which is due to the process of sliding or settling of the connecting bolt along the elongated hole in the sidewall of the console.

Compared with the prototype of the claimed utility model has significant differences, which are as follows:

- oblong holes at an angle alpha are made on the sides of the U-shaped console, and not the U-shaped rack, which is the supporting structure for forming the corresponding consoles on it for laying the electric cable;

- these openings can be either with rounded end faces or with straight ones - in any case, using the fastening element, the console has good mechanical and electrical contact with the stand, since when the console is pulled down from its upper position, the fastening element moves along the side with friction to the sides of the elongated hole and reaches a position in which the console shelf in relation to the rack occupies a position at 90 degrees, and the fastening element fixes this position;

- the fastening element of the console to the rack can be a bolt, or a stud, which are inserted into the holes on the side walls of the rack and the elongated holes on the side walls of the console combined with them, the bolt can be fixed with a nut, and the ends of the stud are unclenched during installation;

- deviations from the specified range of the angle alpha leads to the appearance of a non-perpendicular installation of the console to the rack and the bolt fastening the console to the rack in the oblong hole of the sidewalls of the console will not occupy the corresponding position and will not bear the necessary load;

- in the designs of analogues and prototype there are additional structural elements in the form of catchers - guides or in the form of a T-shaped reinforcing element. In the claimed design there is none of this, i.e. there is a technical result in the form of a simplification of the design while maintaining its strength characteristics.

The patent information search carried out by the applicant showed. that the claimed combination of essential features was not found. Therefore, and given the presence of significant differences with respect to the prototype, the claimed technical solution can be recognized as new.

The authors calculated and experimentally confirmed (see the appendix to this application) that the holes on the side walls of the console are inclined at an angle of (28 ÷ 32) ° to the end edge of the side wall (vertical during installation) (the angle, as is customary in geometry, is calculated by clockwise) and an elongated shape with straight parallel lateral sides makes it possible to create a simple and cheap design that has the necessary rigidity, high mechanical strength, increased electrical connection of the console with the rack, which о creates a reliable electrical contact, not exceeding the resistance value of 0.1 Ohm (it does not require additional grounding). It also provides installation of the console at an angle of 90 degrees to the rack, there is no possibility of disconnecting the console from the rack during installation and laying of cables (or wires), the device has a high load-bearing capacity due to the absence of slots.

The proposed device is schematically depicted in figure 1 (side view of the initial position of the connection of the console with the rack); Figure 2 (view from

side at the final position of the console connection with the stand); Figure 3 (front view of the connection of the console with the rack), where:

1 - rack;

2 - the base of the rack;

3 - side wall of the rack;

4 - hole in the rack for mounting the console;

5 - console;

6 - side wall of the console;

7 - an elongated hole on the side wall of the console;

8 - side of the oblong hole;

9 - end face of the oblong hole.

10 - the base of the console;

11 - fastener (bolt or stud);

12 - hole for attaching the rack to the building base.

The U-shaped stand 1 has a base 2 with holes 12 for attaching to a wall or other surface, on the side walls 3, the rack 1 has symmetrical round holes 4 of radius R for connecting to the console 5 (these holes can be several pairs for attaching several consoles) ( Figure 1, 2). The U-shaped console 5 has a bearing plane (base) 10 and side walls 6. variable in height along their length. On which are made symmetrical elongated slanted to the end of the console at an angle and holes 7 with sides 8 and end - 9, having almost the same the diameter, as well as the diameter of the round holes 4, one on each wall. The distance between the outer surfaces of the side walls 6 of the console 5 is less than the distance between the inner surfaces of the side walls 3 of the rack 1 (Figure 3). The stud 11 (or bolt) is used to connect the console to the rack through the aforementioned holes.

When installing the proposed device, the rack 1 is attached to the building base through holes 12 in its base 2, the console 5 is inserted into the rack 1 with its U-shaped end to its base 2 so that the bearing plane (base) 10 of the console 5 is perpendicular to it,

and the rack 1 and the console 5 are thus connected by their side walls 3 and 6, respectively (Figure 1). Obliquely located on the side walls 6 of the console 5 oblong holes 7 and the corresponding holes 4 on the side walls 3 of the rack 1 are combined and connected using, for example, a bolt or stud 11, which is inserted into the lower end of each oblong hole 7 and in the corresponding hole 4 of the rack 1 (Figure 1). Then, by striking the console 5, when sliding with its side walls 6 along the side walls 3 of the rack 1 in the direction along the sides of the 8 oblong holes 7, it is upset against the stop with a U-shaped end in the base 2 of the rack 1 (Figure 2). In this case, the bolt 11 (stud), overcoming the friction of the side walls of the elongated hole 7, slides along it, destroying the insulating coating of the device parts, and the end part abuts against the inner part of the U-shaped pillar wall, occupying a perpendicular position with respect to it (Fig. 2). The result is a reliable, rigid structure for holding the cables, which has good electrical contact between the rack 1 and the console 5. Moreover, to disassemble such a structure, the order of movement of the parts relative to each other is performed in the reverse order, namely: at the beginning, the bolt 11 or hairpin connection of the side loosens the walls 6 of the console 5 with the side walls 3 of the rack 1. Then a blow from below on the console 5 makes the bolt 11 or the pin slide on the oblong hole 7 made in the side walls of the console and the connection p zbiraetsya because the console 5 moves away from the shelf of the rack 1 and the bolt 11 or the stud goes into the lower position of the said elongated holes 7 (Figure 1). As a result, the connection is disassembled.

Claims (1)

A device for laying electric cables, comprising a U-shaped stand with a base and side walls that have openings and at least one U-shaped stand with two symmetrical openings on its side walls, intended for mounting the console with the stand, the holes on the side walls of the uprights are round and diameter-proportional holes in the side walls of the console, which are oblong with straight parallel sides and are inclined from ki of the console to the rack wall, and through these holes and holes in the side walls of the rack there is an element for attaching the console to the rack in the form of a bolt or stud, while the said oblong holes on the side walls of the console have rounded end sides, and their angle of inclination from the rack wall to the console shelf is 28-32 °.