JP3177470U - Lighting fixture mounting bracket - Google Patents

Abstract

The present invention provides a mounting fixture for a lighting fixture that can be attached and detached easily and in a short time in a containment vessel of a nuclear power plant and that is less likely to drop bolts during the mounting and dismounting operation.
A fixture for attaching / detaching a lighting fixture includes a bracket A having a substantially convex cross section fixed to a beam on a ceiling portion of each room, and a substantially convex cross section having a slightly larger cross section than the bracket A having a lighting fixture fixed by a bolt. The metal fitting B is slid along the outer surface of the metal fitting A and fitted in a fixed position, and the metal fitting A and the metal fitting B are connected by a catch clip provided on the metal fitting B. Configure as follows.
[Selection] Figure 2

Description

  The present invention relates to a mounting / dismounting bracket for a lighting fixture, and more particularly to a mounting / dismounting fixture that allows a lighting fixture to be easily attached / detached from an installation location of a lighting fixture such as a beam or a ceiling.

  The reactor containment vessel of a nuclear power plant has a pressure suppression chamber (suppression pool) that stores water in the lower part of the pressure vessel accommodated therein, and diffuses steam over the entire containment vessel in the upper part of the pressure suppression chamber. Therefore, a grating floor having a mesh-like opening is hierarchically installed. During regular inspections of nuclear power plants, equipment is inspected and maintained at each level, so lighting fixtures are placed at each level, but each level is a narrow space. Since the equipment to be used and the luminaire may interfere with the work, the luminaire is removed and the luminaire is restored (attached) after the work is completed.

  In addition to the attachment and detachment of the luminaire at the time of the above work, there is a need to move the luminaire to a lower radiation place in the containment vessel and reduce the radiation dose to the luminaire to maintain the long life of the luminaire. Therefore, the luminaire may be removed at the end of the periodic inspection.

  As described above, since each level is a grating floor, when attaching and detaching lighting fixtures by removing bolts, nuts, etc., they are accidentally dropped during the work and passed through the opening of the grating floor. There is a risk that it will fall into the suppression pool, and the work must be done with extreme caution. In addition, the work must be carried out in a radiation controlled area. There is a very high demand for rationalization of the attachment / detachment work of lighting fixtures, such as an increase in the radiation dose of workers due to the work and the longer work time.

  In Patent Document 1, an article having a non-uniform shape and size, such as a box or a lighting fixture such as a switchboard or a light board, is added to a columnar object such as a power pole or an outer periphery of a prism that is not uniform. As a method for easy attachment in field work, a configuration is disclosed in which a metal band attached to the columnar object and a hardware attached to the metal band are attached to the article via a ductor channel. However, it is not intended to be used for repeated attachment and removal of articles, and is not necessarily a suitable method for attaching and detaching a lighting fixture that is the object of the present application.

JP 2002-147415 A

  It is an object of the present invention to provide a mounting fixture for a lighting fixture that can be attached and detached easily and in a short time in a containment vessel of a nuclear power plant, and that is less likely to drop bolts during the mounting and removal work. Let it be an issue.

  In order to solve the above-mentioned problems, the lighting fixture attaching / detaching bracket of the present invention is provided in the upper part of the pressure suppression chamber (suppression pool) in the containment vessel and is installed in a hierarchical manner on a grating floor having a mesh-like opening. The metal fitting A having a substantially convex cross section fixed to the beam of the ceiling portion and a metal fitting B having a substantially convex cross section that is slightly larger than the metal fitting A to which the luminaire is fixed by a bolt. The metal fitting B is slid along the fitting position and fitted into a fixed position, and the metal fitting A and the metal fitting B are connected by a catch clip provided on the metal fitting B.

  As a result, the metal fittings A and B can be attached / detached only by opening / closing the catch clip and sliding the metal fitting B integrated with the lighting equipment. In addition, the bolts can be prevented from falling.

  The ductor channel is fixed to a beam on the ceiling of each room, and the metal fitting A is attached to the ductor channel with a bolt.

  As a result, there is a margin in the adjustment of the mounting position of the metal fitting A to the H steel beam to improve workability, and it is not necessary to make a bolt hole in the H steel beam itself, so that the installation position can be easily changed. There is.

  According to the present invention, since it is easy to attach and detach the lighting fixture and can be performed in a short time, it is possible to suppress the radiation exposure of the worker and to reduce the risk of dropping bolts and nuts in the attaching / detaching operation. In addition, the mounting position of the lighting fixture can be changed easily.

Sectional drawing which shows the outline | summary of the reactor containment vessel in which the lighting fixture attachment metal fitting of this invention is used. The bird's-eye view which shows the attachment condition of the lighting fixture attachment / detachment bracket of this invention. The front view which shows the attachment condition of the lighting fixture attachment metal fitting of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, lighting fixtures 40 are installed on the ceilings of the rooms at the respective levels separated by the grating floor above the pressure suppression chamber (suppression pool) 6.
A more detailed mounting structure of the luminaire 40 is shown in FIG. An H steel beam 10 that supports the grating floor is disposed on the ceiling, and a ductor channel 11 is fixed to a mounting position of the luminaire by a hanging bracket 12. A metal fitting A20 having a substantially convex cross section (attached in a downwardly projecting state) is attached to the ductor channel 11 using the nut 13 in the ductor and the bolt 23 arranged at the casing turn-up portion in the ductor channel 11. The metal fitting A20 will not be removed from the H steel beam 10 thereafter unless there is a situation such as breakage.

  The metal fitting B30 has a shape slightly larger than the metal fitting A20, slides along the outer surface of the metal fitting A20, and is fitted at a position (fixed position) where it hits the stopper 22 provided at the end of the metal fitting A20. Catch clips 34 are installed on both side surfaces of the metal fitting B30. Similarly, the catch clips 34 are hooked on the claws 21 provided on both side surfaces of the stopper 22 of the metal fitting A20. Connected.

  The lighting fixture 40 is attached to the metal fitting B30. That is, the bracket B30 and the lighting fixture 40 are integrally fixed by the bolt 32 and the nut 33 via the hanging fitting 41 connected to the upper surface of the lighting fixture 40. A guard 42 is installed on the lower surface of the luminaire 40 so that the light emitter does not fall when subjected to any impact. Note that the bracket B30 and the lighting fixture 40 are not separated or exchanged unless one of them is damaged.

  FIG. 3 is a front view of a state in which the metal fitting B30 is fitted to the metal fitting A20, and a part thereof shows a state inside by a cutaway view, and the catch clip 34 attached to the metal fitting B30 and the metal fitting B30 is a two-dot chain line ( (Imaginary line). The ductor channel 11 is fixed with bolts in a state in which the hanging fitting 12 is hooked on the H steel beam 10. The metal fitting A <b> 20 is bolted to the mid-ductor nut 13 placed on the folded portion inside the ductor channel 11 through the bolt 23 from the lower surface thereof. Thereby, fixation with metal fitting A20 and H steel beam 10 is firm.

  The metal fitting B30 integrated with the lighting fixture 40 is slightly larger than the metal fitting A20, is inserted so as to slide along the outer surface of the metal fitting A20 from the right in FIG. 3, and hits the stopper 22 provided on the left side of the metal fitting A20. The catch clip 34 is fastened to the claw 21 at the position to be in a fitted state. The power cord 43 of the luminaire 40 is structured so that the connector 44 is inserted into a power box 45 (installation is omitted in the figure) installed on the H steel beam 10 or the like so that the luminaire 40 can be easily attached and detached. It has become.

DESCRIPTION OF SYMBOLS 1 ... Reactor building, 2 ... Reactor pressure vessel, 3 ... Reactor containment vessel, 5 ... Grating floor, 6 ... Pressure suppression chamber (suppression pool), 7 ... Reactor auxiliary building, 10 ... H steel beam, 11 ... Ductor channel, 12: Suspension bracket, 13: Ductor nut, 20 ... Bracket A, 21 ... Claw, 22 ... Stopper, 23 ... Bolt, 30 ... Bracket B, 31 ... Hole, 32 ... Bolt, 33 ... Nut, 34 ... Catch clip, 40 ... lighting fixture, 41 ... hanging bracket, 42 ... guard, 43 ... power cord, 44 ... connector, 45 ... power supply box.

Claims (2)

  A metal fitting A having a substantially convex cross-sectional shape fixed to the beam of the ceiling of each room provided on the grating floor having a mesh-like opening provided on the upper part of the suppression pool in the containment vessel, The lighting fixture comprises a generally convex metal fitting B having a cross section that is slightly larger than the metal fitting A fixed with bolts, and the metal fitting B slides along the outer surface of the metal fitting A and fits into a fixed position. A luminaire fitting / detachment bracket, wherein the bracket A and the bracket B are connected by a catch clip provided on the bracket B.   The lighting fixture attaching / detaching bracket according to claim 1, wherein a ductor channel is fixed to a beam on a ceiling portion of each room, and the fitting A is attached to the ductor channel with a bolt.

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