RU215011U1 - CABLE CLAMP - Google Patents

Abstract

The utility model relates to the field of electrical engineering, in particular to devices for fastening and laying cables. The technical result consists in strengthening the strength of the clamp plate and in tighter retention of the cable from shifting in the longitudinal direction. It is achieved by the fact that the clamp for fastening the cable, made of metal in the form of an oblong plate, has a thickening at the end, in which a slot is made, exceeding in width and length, respectively, the thickness of the plate and the width of the plate before the thickening, and in the middle part of the plate a mounting hole is made , while in the cross section the elongated part of the plate to thickening is made of a curved shape. 2 w.p. f-ly, 6 ill.

Description

The utility model relates to electrical engineering, in particular to devices for fastening and laying cables, as well as cable channels.

Known dowel-clamp [Patent RU56509U, publ. 09/10/2006, IPC F16B 13/00, H02G 3/30], consisting of a U-shaped plate, including a loop section designed to accommodate a fixed object, and a shank formed by two tabs, on the outer surfaces of which triangular spacers are made, each of which is limited by a curvilinear convex and two flat surfaces converging to the shank to form a bridge, relative to which the spacer element has the possibility of limited rotation, and on the inner surfaces of the tabs, opposite sections with transverse corrugation are made.

Known plastic cable bracket [source http://streamlan.lt/vo-p8-80-80_cable_bracket_80_x_80_mm_for_vertical_cable_guiding], designed for vertical cable organization and representing a square plastic plate with a slot for the cable.

Known metal bracket [source http://fortisflex.ru/production/cable-staples/smp/] with cutouts and curved sides, designed for fastening metal hoses, cables and pipes to horizontal and vertical surfaces, made of galvanized steel. The design of the bracket allows one person to lay cable lines. The ability to dismantle the product at any time or replace it with a new one, while maintaining the installed mount.

The disadvantages of these designs is the impossibility of installation inside the cable channel and use for cable without a pipe or metal hose, as well as other cable-supporting systems. For the installation of these structures, additional tools are required to tighten the nut and bolt during the installation of the cable line.

These shortcomings are deprived of the known solutions described below.

Known solution according to patent EP0555687 (publ.: 1993-08-18). It describes a cable channel for accommodating cable bundles of various sizes, which consists of a main body, fixed on a holder, and having a base plate and two grooved walls, as well as a plurality of closing clips, which are made as a single unit. The free ends are provided with fixing means.

Known solution according to patent US5639049 (publ.: 1997-06-17). It describes a cable clamp for fixing cables or pipes, which uses a one-piece rigid body J-shaped, consisting of a bowl-shaped bottom, with both ends open, the short side has a locking device located at the end of the specified short side. And the long side has a locking device located at the loose end of the perforated protruding surface, said perforated protruding surface extending in a downward direction. At the upper end of the long side there is a fastening hole having a mechanical device for fastening the specified J-shaped rigid body. Said J-shaped rigid body can repeatedly bend along the surface of both the short side and the long side, where they become common with the cup-shaped bottom.

The disadvantage of the above devices is the complexity of the design.

Known patent RU190949U, publ.: 17.07.2019., In which the claimed cable clamp includes a plate made of non-combustible plastic material with holes made on its surface, and on the side of the plate there is a protrusion, when bent and connected to the hole that forms the fastener.

This design is easier to manufacture (stamping), but has large amounts of metal waste due to the need to make a slot in the plate.

In addition, in the case of repeated use of the clamp (due to incorrect clamping or the need to unfasten the cable), a weak point occurs at the bend of the plate, in which a break is possible if it is made of aluminum.

Also, the technical problem of this analogue is the inconvenience of use due to the fact that the bent protrusion must first be pushed into the bend formed by the plate, and then bent again in the opposite direction. At the same time, the tip of the protrusion has a very short tongue, which is inconvenient to grab by hand. And the use of a tool for bending increases the installation time.

The closest analogue is 82799 ALUMINUM CLAMP HAL 50/11 [https://krep2e.ru/magazin/product/1206238501], published: 10/26/2020.

The prototype is a cable clamp made of metal in the form of an elongated plate with a thickening at the end, in which a slot is made that exceeds in width and length, respectively, the thickness of the plate and the width of the plate before the thickening, and a mounting hole is made in the middle part of the plate.

This design is easy to manufacture (stamping), does not have large volumes of metal waste. The device is convenient to use by hand without tools and the time for its installation is minimal.

Thus, the prototype is devoid of the aforementioned disadvantages inherent in the known solutions, with the exception of the weakness inherent in aluminum and the aforementioned disadvantage.

In it, too, in the case of repeated use of the clamp (due to incorrect clamping or the need to unfasten the cable), a weak point appears at the bend of the plate, in which a break is possible.

Another disadvantage of the prototype is the weak compression of the cable and as a result the cable can slip in the longitudinal direction, for example, if it hangs vertically or has a strong tension from one of the ends. This leads to the fact that you need to use more clamps to crimp the cable.

The objective of the utility model is to eliminate the disadvantages inherent in the prototype while maintaining all its advantages.

The technical result is to increase the strength of the clamp plate in comparison with the prototype, which in turn increases the degree of protection against fracture. In addition, it is possible to more tightly hold the cable from shifting in the longitudinal direction after installation, and fewer clamps are required for this.

The specified technical result is achieved due to the fact that a cable clamp is claimed, made of metal in the form of an oblong plate having a thickening at the end, in which a slot is made that exceeds in width and length, respectively, the thickness of the plate and the width of the plate before the thickening, and in the middle part of the plate is made with a mounting hole, characterized in that in the cross section the elongated part of the plate is made of a curved shape up to the thickening.

Preferably, the plate contains an additional mounting hole.

Preferably, the curved end surface of the plate is formed by punching.

Brief description of the drawings

Figure 1 shows a clamp for attaching a cable with one mounting hole (A - view of the end section, B - top view).

Figure 2 shows a clamp for attaching a cable with an additional mounting hole (A - top view, B - end section view).

Figure 3 - Figure 5 shows the steps for installing the cable using a clamp.

Figure 6 shows a cross-section of the cable clamp installation site.

On the drawings: 1 - plate, 2 - thickening, 3 - slot, 4 - mounting hole, 5 - additional mounting hole, 6 - curved end shape of the plate, 7 - self-tapping screw, 8 - support, 9 - cable, 10 - plate tip, 11 - plate ends.

Implementation of the utility model

The clamp for attaching the cable, like the prototype, is made of metal, for example, aluminum. Clamp (see Fig.1(B)) is made in the form of an elongated plate 1, having a thickening 2 at the end, in which a slot 3 is made, exceeding in width and length, respectively, the thickness of the plate and the width of the plate 1 to thickening 2, so that in the process bend plate 1 of the clamp, its tip 10 (see Fig.4, Fig.5) could crawl into this slot 3.

In the middle part of the plate 1, a mounting hole 4 is made, through which the plate is fixed to the support 8 (see Fig.3).

What is new is that in the cross section (see Fig.1(A)) the elongated part of the plate 1 up to the thickening 2 is made of a curved shape 6. The curved shape 6 of the end part of the plate forms a bulge in the longitudinal direction and thereby forms a stiffening rib, which provides increase in the degree of protection of the clamp against fracture.

On the other hand, the curvature 6 of the cross-section of the plate provides cutting ends 11 into the body of the cable 9 (see Fig.6), thereby more effectively preventing its longitudinal displacement.

If the plate 1 will contain an additional mounting hole 5 (see Fig.2), this allows you to attach the plate 1 to the support more firmly (see Fig.3), which enhances protection against longitudinal displacement of the clamp by eliminating the rotation of the plate relative to the fastener. The exclusion of rotation provides more reliable insertion of the ends 11 of the plate 1 into the body of the cable 9.

The curved end surface 6 of the plate 1 can be formed by stamping, which makes it possible not to change the manufacturing process due to an additional bending operation. For example, during the production of a clamp, during the execution of the central fixing hole 4, the curvature of the shape is simultaneously stamped into the middle part of the plate with a rounded tip of the press.

Another variant of the possible manufacture of the clamp is the bending of the plate 1 of the clamp after its manufacture by stamping. But this increases the production time and the number of operations for the production of one unit of output.

Installation of the cable clamp is carried out as follows.

Clamp with one (Figure 3(left)) or two mounting holes (Figure 3(right)) is fixed with screws 7 to the support 8.

Then, the cable 9 is marked and held at the attachment points (Figure 4).

After that, the plate 1 and the thickening 2 are bent around the cable 9. The tip 10 of the plate is passed into the slot 3 of the thickening 2 and bent in the opposite direction as shown in Fig.5.

Figure 6 shows a cross-section of the cable clamp installation site. From Fig.6 it can be seen that during installation, the ends 11 of the plate 1 cut into the body of the cable 9 and thereby more effectively prevent its longitudinal displacement.

Cutting the ends 11 of the plate into the body of the cable 9 becomes possible due to the fact that the elongated part of the plate 1 to the thickening 2 is made of a curved shape 6. In the prototype, the plate is flat and when the cable is crimped, the ends cut into the cable body does not occur. As a result, the cable can freely slide through the clamps. In the claimed utility model, free displacement is thus eliminated or reduced, which makes it possible to more tightly hold the cable against displacement in the longitudinal direction.

Prototypes were made according to the utility model.

The prototypes were tested in comparison with prototype samples as follows. We fixed the cable on the wall with the help of prototype clamps according to the utility model. The cable body of 3.5 meters was fixed on the wall of 4 meters with only 3 clamps.

Control samples of clamps according to the prototype were also used to fasten the same cable on the same wall. The cable body of 3.5 meters was fixed on the wall of 4 meters with only 3 clamps.

During the tests, they pulled on the end of the cable and tried to pull it out of the clamps.

Samples according to the utility model firmly held the cable from pulling out even with 3 clamps, while the control samples according to the prototype did not provide a reliable hold on the cable. Clamps of control samples were added to the wall and the cable was additionally fixed with them, then they tried to pull again. The cable was securely kept from pulling out only when held with 7 clamps.

Thus, tests have shown that the clamp, according to the utility model, provides effective retention of the cable from displacement in the longitudinal direction and fewer clamps are required for mounting with protection against displacement in the longitudinal direction than in the prototype.

Claims (3)

1. Clamp for fastening a cable, made of metal in the form of an oblong plate, having a thickening at the end, in which a slot is made that exceeds in width and length, respectively, the thickness of the plate and the width of the plate before the thickening, and in the middle part of the plate a mounting hole is made, which differs the fact that in the cross section the elongated part of the plate is made of a curved shape before thickening. 2. Clamp according to claim 1, characterized in that the plate contains an additional mounting hole. 3. Clamp according to claim 1 or 2, characterized in that the curved end surface of the plate is formed by stamping.

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