JP3096782B2 - Storage box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage box for storing accessories such as detectors and transmitters and detector pipes installed near the site of a plant, and more particularly to a natural vibration of a standpipe for mounting the accessory equipment. The present invention relates to a storage box structure suitable for increasing the number.

[0002]

2. Description of the Related Art A conventional storage box is constructed such that a case 1 and a channel base 2 are divided into two as shown in FIG. 4, and the case 1 is formed by a bottom plate 3, a ceiling plate 4, a side plate 5 and a door 6. Shaped. In addition, a stand pipe 7 for supporting accessory equipment (not shown) is provided between the bottom plate 3 and the ceiling plate 4 of the case 1.

For this reason, the natural frequency of the case 1 is low, and vibration occurs during an earthquake or when the door 6 is opened or closed. This vibration causes the attached equipment to resonate, causing a problem that the control circuit malfunctions. The door 6 in the case 1
In order not to resonate with vibrations caused by opening and closing or earthquake,
It was necessary to attach a large number of reinforcing members 8 made of L-shaped steel or the like to the vertical position and the horizontal position inside the case 1. For this reason, the weight of the case 1 itself is heavy, requiring a lot of time for manufacturing, and the attachment equipment must be attached and assembled only after the case 1 has been assembled.

[0004]

Since the seismic frequency in the storage box of the prior art is several Hz to several tens of Hz, it is about 20 Hz.
It is considered that a storage box having a high natural frequency up to about Hz is desirable. For this reason, it is necessary to make the natural frequency of the storage box high. Especially in the storage box installed at the construction site,
Ancillary equipment such as a detector for stopping the plant in the event of an abnormal situation and a transmitter for control are arranged, and malfunctions may occur due to vibrations caused by earthquakes, doors 6, etc., so that a storage box with a high natural frequency can be easily manufactured. It was desired. An object of the present invention is to solve the drawbacks of the prior art, and an object of the present invention is to provide a storage box which can manufacture a storage box having a high natural frequency and is light in weight and inexpensive. is there.

[0005]

According to the present invention, in order to achieve the above-mentioned object, one of the stand pipes is fixed to a channel base, the other end is connected by a fitting, and
The stand pipe is separated from the ceiling plate.

[0006]

The standpipe is fixed to the channel base, and the standpipe is connected at the upper end by a connection fitting, so that the natural frequency of the standpipe can be increased.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded view of a storage box according to an embodiment of the present invention,
2 is an enlarged detailed view of a main part of FIG. 1, and FIG. 3 is a completed view of FIG. 1 after assembly. 1 to 3, reference numerals 1 to 7
Indicates the same as the conventional one. Reference numeral 9 denotes a stand fitting for connecting the stand pipes 7 to each other, reference numeral 10 denotes a reinforcing member for the channel base 2, reference numeral 11 denotes an anti-vibration rubber interposed between the case 1 and the channel base 2, and reference numeral 12 denotes the case 1 The fixing bolt 13 is an accessory equipment such as an instrument and a detection pipe.

In such a structure, reinforcing members 10 and 10 are fixed to the channel base 2 by welding as shown in FIGS. 1 and 2, and a stand pipe 7 is fixed to the reinforcing member 10 by welding. I have. The upper portions of the stand pipes 7, 7 are connected with connecting fittings 9 as shown in FIGS.
The stand pipe 7 is separated from the ceiling plate 4 of the case 1.

In manufacturing the storage box, the bottom plate 3 is mounted on the channel base 2, the stand pipe 7 is fixed on the reinforcing member 10 of the channel base 2 by welding, and the upper part of the stand pipe 7 is connected to the connection fitting 9. Perform the painting work while fixing with. In this state, as shown in FIG. 3, the attached equipment 13 such as an instrument is attached to the stand pipe 7, and thereafter, the vibration isolating rubber 11 separately manufactured and the case 1 are covered, and the assembly is completed. The case 1 is attached to the channel base 2 with bolts 12 as shown in FIG.

That is, the case 1 of the storage box is made of a thin steel plate, and the natural frequency of the entire storage box becomes low. However, the auxiliary equipment 13 is attached to the stand pipe 7 which is firmly fixed to the channel base 2, and the stand pipe Since the structure 7 and the case 1 are separated from each other, the vibration such as an earthquake has a frequency of several Hz related to the channel base 7, but does not resonate because the natural frequency of the stand pipe 7 is high. Even if the frequency of Case 1 is low and resonates with the seismic frequency,
The case and the case 1 are fixed via the vibration-proof rubber 11, so that the stand pipe 7 does not resonate with the earthquake frequency at a natural frequency of about 20 Hz or more.

Further, by separately manufacturing the case 1, the storage box is formed by attaching the accessory 1 to the stand pipe 7 from all sides and then covering the case 1, so that the attachment to the stand pipe 7 is easy. There are advantages.

The case 1 does not have a skeleton by the reinforcing member 8 such as an L-shaped steel material, and may be a structure having a low natural frequency only by sheet metal working, and can be manufactured lightly and inexpensively.

[0013]

According to the present invention, the attachment portion of the accessory equipment can be made to have a high natural frequency, and the storage box can be made light and easy, and can be made compact.

[Brief description of the drawings]

FIG. 1 is an exploded view of a storage box according to an embodiment of the present invention.

FIG. 2 is an enlarged detail view of a main part of FIG. 1;

FIG. 3 is a completed view after the assembly of FIG. 1;

FIG. 4 is a perspective view showing a conventional storage box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Channel base 3 Bottom plate 4 Ceiling plate 7 Stand pipe 9 Connection metal fitting 13

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-61-111420 (JP, A) JP-A-60-34706 (JP, U) JP-A-1-95612 (JP, U) JP-A 61-111 174782 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G12B 9/02 G01D 11/24 H02B 1/00 H05K 5/00

Claims (1)

(57) [Claims] 1. A stand pipe for supporting accessory equipment is disposed from a bottom plate to a ceiling plate of a case, and the case is fixed on a channel base to store the accessory equipment. One of the stand pipes is used as a channel base. A storage box which is fixed and the other end is connected by a connection fitting, and wherein a stand pipe is separated from a ceiling plate.