JPH073209U - switchboard - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the vertical vibration of the rear panel when transporting the switchboard. [Structure] While attaching the fixing screw 3 to the housing 1, the rear plate 2 is formed with a mounting hole 4 consisting of a large hole 4a and a long hole 4b, and the fixing screw 3 is inserted into the upper portion of the long hole 4b to form the rear plate. In the switchboard to which 2 is attached, the fixing screw 3 and the rear plate 2 are formed by the restraining member 5 having the concave portion 5a into which the fixing screw 3 is fitted and the convex portion 5b to be fitted into the large hole 4a formed in the lower portion. Constrain relative movement.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switchboard in which a back plate hooked on a fixing screw does not vibrate.

[0002]

[Prior art]

 The switchboard is configured by accommodating electrical equipment inside the housing through an opening at the rear of the housing and attaching a back plate to the opening. The back plate is attached to the case as shown in Figs. A fixing screw 3 including a screw portion 3a and a head portion 3b is attached to the upper rear portion of the housing 1, while a large hole 4a having an inner diameter larger than that of the head portion 3b is attached to the upper portion of the back plate 2. And an elongated hole 4b as a small hole having an inner diameter larger than the screw portion 3a and smaller than the head portion 3b is formed.

To attach the back plate 2 to the housing 1, as shown in FIG. 4 (a), the back plate 2 is lifted to a position higher than the mounted state and the head 3 b of the fixing screw 3 is inserted into the large hole 4 a. When the back plate 2 is lowered with the threaded portion 3a positioned inside the large hole 4a, the threaded portion 3a moves relatively upward along the long hole 4b. As shown in FIG. 4B, the head portion 3b restrains the rear plate 2 from coming off from the fixing screw 3. That is, the back plate 2 is attached to the housing 1.

By using such a configuration, the back plate 2 can be moved up and down to be attached to or removed from the housing 1 without rotating the fixing screw 3 to remove it.

[0005]

[Problems to be solved by the device]

 However, if the distribution board is subjected to vibration for a long time during transportation, the back plate will vibrate up and down, and the vibration of the back plate will loosen the fixing screws, and the back plate will be scratched or cracked. The back plate may come off the case.

Therefore, an object of the present invention is to provide a switchboard that solves such a problem.

[0007]

[Means for Solving the Problems]

 To achieve such an object, the structure of the present invention is such that a fixing screw having a large-diameter head is attached above the opening in a housing having an opening for accommodating an electric device, while the opening is opened. The upper part of the lid that closes the part has a larger inner diameter than the outer diameter of the head of the fixing screw.It is smaller than the outer diameter of the upper part and the head of the large hole and smaller than the outer diameter of the screw. In a switchboard that has a mounting hole that connects the bottom of a small hole with a large inner diameter, restrains the relative movement between the fixing screw and the lid when the fixing screw is inserted into the small hole. The restraint member is provided, and the recessed portion into which the threaded portion of the fixing screw slips is provided on the upper portion of the restraint member, and the convex portion that protrudes horizontally to the side of the large hole opposite the small hole is formed on the lower portion of the restraint member. It is characterized by

[0008]

[Action]

 A restraint member is interposed between the fixing screw that suspends the housing and the lid, and the fixing screw is inserted into the recess, while the projection is fitted into the large hole to allow the housing and the lid to move relative to each other. Constrain the physical relationship. For this reason, the lid does not vibrate vertically even if it receives vibration for a long time during transportation of the switchboard.

[0009]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. Since the present embodiment is an improvement of a part of the conventional switchboard, the same parts as those of the conventional one are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described.

The structure of the switchboard according to the present invention is shown in FIGS. In addition to the conventional switchboard, the switchboard according to the present invention is provided with a restraining member that prevents the rear plate as the lid body from moving relative to the fixing screw. 1 (a) and 1 (b) are diagrams in which a restraint member is attached to a switchboard in which a back plate 2 is attached to a housing 1, and FIGS. 2 (a) and 2 (b) are diagrams of the restraint member.

As shown in FIG. 2, the restraint member 5 has a substantially plate shape and is provided for the purpose of restraining the distance between the fixing screw 3 and the large hole 4a from becoming small. That is, a recess 5a into which the screw portion 3a of the fixing screw 3 is inserted after the back plate 2 is mounted on the housing 1 is formed on the upper part of the restraining member 5 from above, while the mounting hole 4 of the back plate 4 is A convex portion 5b which is fitted in the lower portion of the large hole 4a to prevent the rear plate 2 from moving upward is formed in the lower portion of the restraint member 5 so as to project horizontally toward the housing 1. The recess 5a has a width W larger than the outer diameter of the screw portion 3a and outside the head 3b so that the fixing screw 3 can be inserted and the restraining member 5 does not fall off from the fixing screw 3. It is set smaller than the diameter. On the other hand, the convex portion 5b is set to have a width L that can go to the bottom of the large hole 4a and a protrusion amount H that is smaller than the thickness of the back plate 2.

Next, the operation of such a switchboard will be described. When assembling the switchboard at the factory, the back plate 2 is attached to the housing 1 as shown in FIG. After that, as shown in FIG. 1, the restraint member 5 is pushed in by inserting it between the head portion 3b of the fixing screw 3 and the back plate 2 from below. Then, the fixing screw 3 slides into the recess 5a. After the fixing screw 3 has been pushed into the lower end of the recess 5a, the protrusion 5b protruding from the lower end of the restraint member 5 is pushed into the large hole 4a. Finally, when the fixing screw 3 is tightened, the restraint member 5 comes into close contact with the rear plate 2 and the restraint member 5 is interposed between the fixed screw 3 and the rear plate 2 coupled to the casing 1, so that during transportation of the switchboard. The back plate 2 is prevented from vibrating vertically with respect to the housing 1. Therefore, the loosening of the fixing screw 3 is prevented, and even if the fixing screw 3 is loosened, the restraining member 5 suppresses the vertical movement of the back plate 2, and the back plate 2 is not scratched or comes off. Absent.

When the switchboard arrives at the site, the fixing screw 3 is loosened, the restraining member 5 is removed, and the fixing screw 3 is tightened again. After that, since the restraint member 5 is removed, it can be used as a switchboard similar to the conventional one.

[0014]

[Effect of device]

 As can be seen from the above description, according to the switchboard of the present invention, the restraint member restrains the movement of the lid body with respect to the fixing screw, so that the lid body can be subjected to vibration for a long time when the switchboard is transported. Does not vibrate in the vertical direction, and therefore the lid is not damaged or the lid does not come off, and it is possible to deliver a high-quality switchboard as it is.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a switchboard according to the present invention, and FIG.

2A and 2B are a front view and a right side view of a restraint member.

FIG. 3 is a configuration diagram of a conventional switchboard.

FIG. 4 is an operation explanatory view of a conventional switchboard.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Back plate 3 ... Fixing screw 3a ... Screw part 3b ... Head part 4 ... Mounting hole 4a ... Large hole 4b ... Long hole 5 ... Restraining member 5a ... Recessed part 5b ... Convex part

Claims (1)

[Scope of utility model registration request] 1. A fixing screw having a large-diameter head is attached above the opening of a casing having an opening for housing an electric device, while an upper part of a lid body for closing the opening is attached. Connect the upper part of the large hole whose inner diameter is larger than the outer diameter of the head of the fixing screw and the lower part of the small hole whose inner diameter is smaller than the outer diameter of the head and larger than the outer diameter of the screw part. In a switchboard with a mounting hole, a restraint member is provided to restrain the relative movement between the fixing screw and the lid with the fixing screw inserted into the small hole. The switchboard is characterized in that a recessed portion into which the screw portion is inserted is provided, and a convex portion that protrudes horizontally in the lower portion of the restraining member and that is inserted into the side opposite to the small hole side is formed.