KR20000013523U - Nuts for Cable Tray Support - Google Patents

Abstract

In the cable tray support nut, which has been used in the past, the process of fixing the spring to the bottom of the manufacturing process is complicated, so that the production cost is increased and the workability at the work site is reduced. It is very effective in preventing the risk of manpower, time and accidents by completely eliminating the disadvantages of the conventional design by simply attaching the butterfly wing plastic injection molding formed on the nut body with a constant restoring force and being easily gripped by hand. It is a useful design.

Description

Nuts for Cable Tray Support

The present invention forms a gripping butterfly wing that is easy to be gripped at the upper end with a plastic injection object on the nut to fix the cable tray used for the temporary work of the electric wire with the C type chanel. It is intended to make production costs cheap by simplifying its production process while making it easy and robust.

The present invention relates to nuts among fastening parts such as bolts, flat irons, nuts, etc., which are used for the purpose of firmly fixing the cable trays installed on the ceiling and the wall together with the C-type chanel when laying the wires.

In general, in large wire works where a large amount of wires are installed, cable trays are pre-installed on the ceiling or walls, and the wires are laid long on the cable trays. At this time, the cable trays are installed at the upper end of the C-type chanel supporting the cable trays and must be firmly fastened together to secure stability from vibration and other external pressures. To do so, bolts (3) and flat iron (4) The nut (1) is a pair to obtain a tightening force. Due to the structure of the C-type chanel, the nut is installed in the C-channel, but is elastically coupled by a spring so as not to flow to the left and right and the bottom in order to easily insert the bolt.

The conventional tray support nut used in the above is provided with a pair of nut grooves 30 inserted into the C-shaped chanel and abutted on the bent lower end 25, and the corners symmetric in the diagonal direction among the four corners are provided. The spring 11 is formed integrally with the screw hole and the bottom surface formed in a predetermined curved surface and vertically penetrated to the center portion. Looking at the manufacturing process of the conventional nut used in this way to form a spring fixing groove (11a) for fixing the spring 11 to the bottom surface of the first nut. The spring is fixed by inserting the spring 11 into the spring fixing recess 11a thus formed and crushing it with a wedge punch 40 so as to apply an external pressure from the inside of the nut hole for forming a thread. Thus, the conventional cable tray support nut is completed through several process operations to fix the spring to enable elastic coupling in the manufacturing process, and forms a separate gripping portion on the nut itself even in the field installation work. Therefore, it was very troublesome to fix the spring because the spring could be bent during the work to be rotated 90 ° inside the narrow C-channel while applying pressure (D) from the upper part.

In order to solve the above problems, the present inventors, in the Utility Model Registration 96-98228 and Utility Application 94-290, the gripping butterfly wing is easily configured by gripping at the upper end of the nut so that the C-type chanel is inserted into and fixed inside. It was completed as possible.

Nevertheless, since the above invention was molded into a steel plate by press working, it was difficult to form a plurality of molds necessary for the manufacturing work of gripping butterfly wings, and in order to achieve a plurality of operations, the manufacturing cost of the molds must be very expensive. did. For this reason, the operation efficiency during the production operation of the gripping butterfly blade by the press working was slightly reduced, which did not significantly reduce the manufacturing cost. The present invention is designed to solve the disadvantages of high equipment investment and low efficiency of press processing. The above-mentioned gripping butterfly wings are completed by plastic injection molding, which is relatively inexpensive to mold compared to the production of press molds. Due to its characteristics, it was possible to produce dozens of products by one molding operation, and thus, it was intended to significantly reduce manufacturing costs.

1 is a perspective view showing a temporary state of a cable tray;

Figure 2 is an exploded perspective view of a conventional cable tray support nut,

3 is an exemplary view showing an embodiment of fixing a conventional cable tray support nut to a C-shaped channel;

Fig. 4 is a state diagram in which the side rail of the cable tray is fixed to a C-channel by using a conventional cable tray nut or the like.

5 is an exploded perspective view of a cable tray support nut of the present invention;

Figure 6 is a bottom view of the cable tray support nut of the present invention,

7 is a cross-sectional view taken along line A-A 'of the cable tray support nut of the present invention according to FIG.

8 is an exemplary view showing an embodiment of fixing the cable tray support nut of the present invention to a C-shaped chanel,

Figure 9 is a state diagram for fixing the side rail of the cable tray to the C-type chanel using the cable tray support nut of the present invention.

<Explanation of symbols for main parts of the drawings>

1: Nut body 1a: Nut insertion hole 3: Bolt

3a: Through bolt 4: Flat iron 5: Rolled screw

7: Side rail 9: Type C Chanel 13: Spring

11a: Groove for fixing spring 20: Type C channel

21: Bend of Chanel C: 25: Bend of Chanel C:

30: Nut groove 40: Wedge-type punch

50: gripping butterfly wing 60: projection to prevent separation

60a: Release prevention protrusion at the time of relaxation 60b: Release prevention protrusion at the restoration state

70: protrusion prevention protrusion

A: Length direction of type C chanel B: Width direction of type C chanel

C: 90 ° rotation direction D: Spring compression pressure

Hemp: Restoration pressure of gripping butterfly wing

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings for a cable tray support nut as follows.

Figure 1 shows the fastening state of the C-type chanel 20 and the cable tray using a conventional cable tray support nut that has been widely used in the art. In this case, while covering the bent portion of the side rail (7) included in the cable tray with a flat iron (4) to tighten the bolt (3) to the nut (1) installed inside the C-shaped chanel to obtain a tightening force.

In this case, when the nut is installed inside the C-channel, the C-channel is inserted into the upper opening of the C-channel by the lengthwise direction of the C-channel. Then rotate the nut 90 ° (b). At this time, the groove 30 of the nut is in close contact with the lower end portion 25 of the bent portion 21 by a spring 11 coupled to the bottom of the nut, so that the nut does not flow to the left and right sides of the C-type chanel. Combined. In this series of work, the nut did not contain a separate gripping part, which was very cumbersome. Therefore, the present invention has been devised to overcome the problems of the above-described design with reference to Figures 5, 6, 7, and 8.

A gripping butterfly wing 50 for easy gripping at the upper end of the nut, and a nut insertion hole 1a for inserting and fixing the nut body 1 at the lower end of the gripping butterfly wing 50 and the inserted nut Departure preventing projections (60) for preventing the departure and departure prevention projections fixing protrusions (70) to be finely formed so that the separation prevention projections can be broken by a predetermined or more external pressure.

In addition, the bolt through hole (3a) that allows the passage of the bolt during the bolting operation is formed in the center. The gripping butterfly wing 50 thus formed is bent like a bow as shown in Fig. 8, and then inserted into the C-type chanel while rotating 90 ° in the direction of the die and releasing the gripping pressure. Is elastically coupled to the C-type chanel by the restoring pressure (e) to restore the body horizontally with the nut. Covering the flat iron (4) and tightening the bolts to support the cable tray in the same way as in the previous method to support the cable tray at this time, while locking the bolt deeply in the screw hole containing the nut to prevent the departure of the original nut body Prevention protrusion 60 is opened while the separation prevention protrusion attachment flesh 70 is broken.

As described above, the use of the cable tray support nut of the present invention is simplified while reducing the manufacturing cost by simplifying the manufacturing process of the cable tray support nut by using the gripping butterfly wing 50 elastic body formed by the plastic injection method. It is very useful for saving labor costs by eliminating uncomfortable work such as tumbling in the field.

Claims (1)

In forming the cable tray support nut, A nut body 1; A gripping butterfly wing 50 having a restoring force (e) in the horizontal direction with the nut body 1; A nut insertion hole 1a for inserting and fixing the nut body; An assembled prevention body (60) for preventing the assembled nut body (1) from being separated from the gripping butterfly wing elastic body prior to engagement with the bolt; A bolt through hole 3a; A cable tray support nut made of plastic and metal, including a release preventing projection fixing rib (70) formed so finely as to be broken when the bolt (3) is inserted deep.