JP2020108305A - Casing for power receiving and transforming facility and power receiving and transforming facility - Google Patents

Abstract

To provide a casing for a power receiving and transforming facility capable of easily removing a cover member from a mounting portion while preventing fixing between the mounting portion and the cover member from being released.SOLUTION: A casing 100 of a power receiving and transforming facility has a structure in which, in a state where a protective cover 20 is disposed on a frame 11 and a fixing screw 40 is inserted via through-holes 20a, 11a as well as a rubber nut 30 from a protective cover 20 side, by being fastened to a fastening nut 33 provided on a frame 11 side, the rubber nut 30 is flexed by an amount larger than a diameter L2 of the through-hole 20a on a side of a screw head 41.SELECTED DRAWING: Figure 7

Description

The present invention relates to a power receiving and transforming equipment casing and a power receiving and transforming equipment, and in particular, a receiver including a mounting portion, a cover member mounted to the mounting portion, a screw member, and a flexible member into which the screw member is inserted. The present invention relates to a casing for substation equipment and a substation equipment.

BACKGROUND ART Heretofore, there has been disclosed an elastic rubber nut that includes a nut housed in a rubber body and a tightening bolt that is screwed into the nut, and fixes the plate bodies to each other (for example, see Patent Document 1).

In the above patent document, a pair of plate bodies (a first plate body and a second plate body) is provided, which includes a nut housed in a rubber body (flexible member) and a tightening bolt (screw member) screwed to the nut. An elastic rubber nut for fixing the bodies to each other is disclosed. The elastic rubber nut includes a cylindrical rubber main body having a flange portion at one end and a nut accommodated at the other end of the rubber main body. The first plate body and the second plate body are overlapped with each other so that the through holes formed in the first plate body and the second plate body communicate with each other. The cylindrical rubber body of the elastic rubber nut is inserted into the through hole of the plate body and the through hole of the second plate body. Thus, the flange portion of the elastic rubber nut is arranged on the side of the first plate body opposite to the second plate body. Then, the tightening bolt is inserted from the flange side into the cylindrical rubber body, and the tightening bolt and the nut are screwed together. As a result, the nut inserted in the rubber body approaches the head side of the tightening bolt. As a result, the first plate body and the second plate body are fixed on the side opposite to the first plate body of the second plate body in a state where the cylindrical rubber body is deformed so as to bend. The outer diameter of the flange portion is larger than the diameters of the through holes of the first plate body and the through holes of the second plate body. Further, since the cylindrical rubber body is deformed so as to bend, unlike the case where a flexible member such as a rubber nut is not used, due to vibration, the first plate body and the second plate body It is suppressed that the fixation of is released.

Japanese Utility Model Publication No. 5-52323

Here, a conventional elastic rubber nut for fixing a pair of plate bodies (first plate body and second plate body) as in Patent Document 1 described above is used as a casing for substation equipment including a distribution board or a distribution board. In the above, it may be considered to be used for fixing the mounting portion and a protective cover provided to cover an electric device or the like housed inside the housing. For example, the first plate of Patent Document 1 is used as a protective cover, and the second plate is used as a mounting portion. In this case, the flange portion of the elastic rubber nut and the head portion of the tightening bolt are arranged on the protective cover side. However, since the diameter of the head portion of the tightening bolt and the outer diameter of the flange portion are larger than the diameter of the through hole of the first plate body (protective cover), in order to remove the protective cover from the mounting portion, It is necessary to completely remove (the rubber body of) the elastic rubber nut from the through hole of the body and the through hole of the second plate body. Therefore, when the conventional elastic rubber nut described in Patent Document 1 is used for fixing the mounting portion and the protective cover in the power receiving and transforming equipment casing, the fixing between the protective cover and the mounting portion is released due to vibration. Although this is suppressed, there is a problem in that the protective cover cannot be easily removed from the mounting portion.

The present invention has been made to solve the above problems, and an object of the present invention is to mount a cover member while suppressing the release of the fixing between the mounting portion and the cover member. To provide a casing for power receiving and transforming equipment and a power receiving and transforming equipment that can be easily removed from a unit.

In order to achieve the above object, a casing for power receiving and transforming equipment according to a first aspect of the present invention is a casing for power receiving and transforming equipment including a switchboard or a distribution board, and is provided inside the casing for power receiving and transforming equipment. A mounting portion that is arranged and has a first through hole formed therein, a second through hole is formed, and a cover member that is attached to the mounting portion, and a screw head having a diameter smaller than the diameter of the second through hole. A flexible member through which the body of the screw member is inserted, the flexible member including a first through hole and a second through hole. Of the flexible member and the screw member extending from the cover member side through the second through hole and the first through hole in a state in which the screw member is inserted into at least the second through hole and the cover member is arranged in the mounting portion. By being fastened to the female threaded portion provided on the mounting portion side in the state where it is inserted, the flexible member is bent to be larger than the diameter of the second through hole on the screw head side.

In the casing for power receiving and transforming equipment according to the first aspect of the present invention, as described above, in the state in which the cover member is arranged in the mounting portion, the screw member is provided with the second through hole and the first through hole from the cover member side. Since the flexible member is inserted through the hole and is fastened to the female screw portion provided on the mounting portion side, the flexible member is smaller than the diameter of the second through hole on the screw head side. It has been greatly bent. As a result, on the screw head side, the flexible member is bent to be larger than the diameter of the second through hole, so that the fixing of the attachment portion and the cover member is prevented from being released, and the attachment portion is prevented. The cover member can be fixed to. In addition, since the degree of bending of the flexible member can be reduced by loosening the fastening of the screw member with respect to the female threaded portion, the degree of bending of the flexible member until the diameter becomes smaller than the diameter of the second through hole. By making smaller, the fixing of the cover member to the mounting portion can be released. Further, since the diameter of the screw head is smaller than the diameter of the second through hole, the cover member is attached so that the second through hole is inserted into the screw head in a state where the fastening of the screw member to the female screw portion is loosened. The cover member can be detached from the mounting portion without removing the screw member from the female screw portion by moving away from the side opposite to the portion. As a result, the cover member can be easily removed from the mounting portion while suppressing the release of the fixing between the mounting portion and the cover member.

In the casing for electric power receiving and transforming equipment according to the first aspect, preferably, the screw member is loosened to be fastened to the female screw portion in a state where the engagement state of the screw member with the female screw portion is maintained. On the head side, the bending is relaxed so that the flexible member is smaller than the diameter of the second through hole, and the cover member is configured to be removable from the mounting portion. According to this structure, the cover member can be detached from the mounting portion in a state where the engagement state of the female screw portion of the screw member is maintained, so that the screw member does not have to be removed from the female screw portion. The cover member can be reliably and easily removed from the mounting portion.

In the casing for power receiving and transforming equipment according to the first aspect, preferably, a plurality of first through holes of the mounting portion and a plurality of second through holes of the cover member are provided, and a diameter of the second through hole. Is larger than the diameter of the first through hole. According to this structure, since the diameter of the second through hole is larger than the diameter of the first through hole, the cover member is moved relative to the mounting portion, so that the first through hole and the first through hole are seen in a plan view. It is possible to easily communicate with the second through hole. As a result, even if the positions of the plurality of second through holes of the cover member with respect to the plurality of first through holes of the mounting portion are deviated due to the processing error, it is possible to prevent the cover member from being attached to the mounting portion. can do.

In the casing for power receiving and transforming equipment according to the first aspect, preferably, the flexible member is connected to the main body portion that is inserted from both the first through hole and the second through hole from the cover member side, and the main body portion. And a flange portion having a diameter larger than the diameter of the main body portion, the flange portion being disposed on the side opposite to the cover member side of the mounting portion, and the female screw portion including a nut member fixed to the flange portion. .. According to this structure, the step portion between the main body portion of the flexible member and the flange portion can be engaged with the edge portion of the first through hole of the attachment portion. Then, with the step portion of the flexible member engaged with the edge portion of the first through hole of the mounting portion, the screw member is fastened (screwed) to the nut member, whereby the main body portion is easily bent. I can do it.

In the casing for power receiving and transforming equipment according to the first aspect, preferably, the flexible member is configured to be inserted into the second through hole from the cover member side, and the female screw portion is the mounting portion. It is provided in the first through hole. According to this structure, since the female screw portion is provided in the first through hole of the mounting portion, it is possible to suppress an increase in the number of parts unlike the case where a nut member to be fastened to the screw member is separately provided. You can

In order to achieve the above-mentioned object, a power receiving and transforming facility according to a second aspect of the present invention includes a power receiving and transforming unit including a switchboard or a distribution panel, and a housing in which the power receiving and transforming unit is housed. A mounting member having the first through hole formed therein, a second through hole formed therein, a cover member mounted to the mounting portion, a screw head having a diameter smaller than the diameter of the second through hole, and a body And a flexible member having flexibility through which the body portion of the screw member is inserted, and the flexible member includes a first through hole and a second through hole. In a state where the screw member is inserted into at least the second through hole and the cover member is arranged in the mounting portion, the screw member inserts the flexible member from the cover member side through the second through hole and the first through hole. In this state, the flexible member is bent to be larger than the diameter of the second through hole on the screw head side by being fastened to the female screw portion provided on the mounting portion side.

In the power receiving and transforming facility according to the second aspect of the present invention, as described above, the screw member is inserted from the cover member side through the second through hole and the first through hole in the state where the cover member is arranged in the mounting portion. While the flexible member is inserted, it is fastened to the female screw portion provided on the mounting portion side so that the flexible member does not bend more than the diameter of the second through hole on the screw head side. Has been. As a result, on the screw head side, the flexible member is bent to be larger than the diameter of the second through hole, so that the fixing of the attachment portion and the cover member is prevented from being released, and the attachment portion is prevented. The cover member can be fixed to. Further, by loosening the fastening of the screw member to the female screw portion, the fixing of the cover member to the mounting portion can be released. Further, since the diameter of the screw head is smaller than the diameter of the second through hole, the cover member is attached so that the second through hole is inserted into the screw head in a state where the fastening of the screw member to the female screw portion is loosened. Since the degree of bending of the flexible member can be reduced by moving the flexible member away from the portion, the degree of bending of the flexible member can be reduced until it becomes smaller than the diameter of the second through hole. The fixing of the cover member to the mounting portion can be released. As a result, the cover member can be easily removed from the mounting portion while suppressing the release of the fixing between the mounting portion and the cover member.

According to the present invention, as described above, the cover member can be easily removed from the mounting portion while suppressing the release of the fixing between the mounting portion and the cover member.

FIG. 3 is a perspective view showing a state in which an opening/closing door on the front surface of the casing for power receiving and transforming equipment according to the first embodiment of the present invention is released. FIG. 3 is a perspective view showing a state in which a protective cover of the power receiving and transforming equipment casing according to the first embodiment of the present invention is removed. FIG. 3 is a diagram showing a frame body, a protective cover, a rubber nut, and a fixing screw of the power receiving and transforming equipment casing according to the first embodiment of the present invention. FIG. 4 is a diagram showing a state in which a rubber nut is fitted in a through hole of a frame body in the power receiving/transforming equipment casing according to the first embodiment of the present invention. FIG. 4 is a diagram showing a state in which a fixing screw is temporarily tightened on a rubber nut in a state in which the rubber nut is fitted in a through hole of a frame body in the casing for power receiving/transforming equipment according to the first embodiment of the present invention. The figure which showed the state in which the protective cover was arrange|positioned to the frame from the screw head side of a fixing screw in the state where the fixing screw was temporarily tightened to the rubber nut in the casing for electric power substation equipment by 1st Embodiment of this invention. Is. FIG. 3 is a diagram showing a state in which a fixing screw is permanently fastened to a rubber nut from a state in which a protective cover is arranged on the frame body in the power receiving/transforming equipment casing according to the first embodiment of the present invention. It is the figure which showed the frame of the housing|casing for substation equipment by a 2nd Embodiment of this invention, a protective cover, a sleeve, and a fixing screw. FIG. 13 is a diagram showing a state in which the sleeve is arranged in the frame body so that the through hole of the sleeve communicates with the through hole of the frame body in the casing for power receiving/transforming equipment according to the second embodiment of the present invention. FIG. 14 is a diagram showing a state in which a fixing screw is temporarily fastened to a rubber nut in a state in which a sleeve is arranged in the frame body in the casing for power receiving and transforming equipment according to the second embodiment of the present invention. The figure which showed the state in which the protective cover was arrange|positioned to the frame from the screw head side of a fixing screw in the state which the fixing screw was temporarily tightened to the rubber nut in the casing for substation equipment by 2nd Embodiment of this invention. Is. FIG. 11 is a diagram showing a state in which a fixing screw is permanently fastened to a rubber nut from a state in which the protective cover is arranged on the frame body in the casing for power receiving and transforming equipment according to the second embodiment of the present invention. FIG. 16 is a diagram showing a state in which a fixing screw is provisionally fastened to a rubber nut from a state in which a sleeve is arranged on the frame body in a frame body for a power receiving and transforming equipment casing according to a modified example of the second embodiment of the present invention.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings.

[First Embodiment]
A configuration of a power receiving and transforming equipment casing 100a used in the power receiving and transforming equipment 100 according to the first embodiment of the present invention will be described with reference to FIGS. The power receiving and transforming facility 100 is, for example, a switchboard or a distribution board. That is, the power receiving and transforming facility 100 is a cubicle of the power converter. The power receiving and transforming equipment housing 100a is an example of the "housing" in the claims.

As shown in FIG. 1, inside the power receiving and transforming equipment casing 100a, a protective cover 20 is provided so as to cover an electric device 1 (see FIG. 2) such as a switch and a meter from the front side of the power receiving and transforming equipment casing 100a. Is provided. Further, as shown in FIG. 2, a frame body 11 is provided inside the power receiving and transforming equipment casing 100a. Then, the protective cover 20 is attached to the frame body 11 (see FIG. 7) from the X1 direction side. In addition, in FIG. 1, a state in which an opening/closing door 12 provided on the front side of the power receiving and transforming equipment casing 100a is opened (a state for a worker to access the electric device 1 inside the power receiving and transforming equipment casing 100a). ) Is shown. In the following description, the front-back direction of the power receiving and transforming equipment housing 100a is the X direction, the front direction (front side) of the power receiving and transforming equipment housing 100a is the X1 direction, and the rear direction of the power receiving and transforming equipment housing 100a is the rear direction. (Rear side) is the X2 direction. The electric device 1 is an example of the "power receiving and transforming unit" in the claims. The frame 11 and the protective cover 20 are examples of the "mounting portion" and the "cover member" in the claims, respectively.

As shown in FIG. 7, the protective cover 20 is configured to be fixed to the frame body 11 with a rubber nut 30 and a fixing screw 40. Further, as shown in FIG. 5, the protective cover 20 is configured to be removable from the frame body 11. In the power receiving and transforming equipment casing 100a, the protective cover 20 and the frame body 11 are arranged on the X1 side and the X2 side, respectively. The rubber nut 30 and the fixing screw 40 are examples of the “flexible member” and the “screw member” in the claims, respectively.

As shown in FIG. 1, in the power receiving and transforming equipment casing 100 a, the protective covers 20 are attached to the frame body 11 at a plurality of positions with respect to one protective cover 20. That is, in the first embodiment, a plurality of through holes 11 a (described later) of the frame body 11 and a plurality of through holes 20 a (described later) of the protective cover 20 are provided. The through hole 11a and the through hole 20a are examples of the "first through hole" and the "second through hole" in the claims, respectively.

As shown in FIG. 3, a through hole 11a and a through hole 20a are formed in the frame body 11 and the protective cover 20, respectively. In the first embodiment, the diameter L2 of the through hole 20a is formed larger than the diameter L1 of the through hole 11a. Note that FIG. 3 shows a state in which the frame 11, the protective cover 20, the rubber nut 30, and the fixing screw 40 are completely separated.

The rubber nut 30 has a sleeve 31 and a flange portion 32. The sleeve 31 is formed in a tubular shape (inner portion 31a) having an inner diameter L3 and an outer diameter L4 (slightly smaller than the diameter L1 of the through hole 11a). Thereby, the sleeve 31 can be inserted into the through hole 11a and the through hole 20a. The flange portion 32 is connected to the sleeve 31 and has a diameter L5 larger than the diameter (outer diameter) L4 of the sleeve 31. As a result, a step 43 is formed between the sleeve 31 and the flange 32. The diameter L5 is larger than the diameter L2 of the through hole 20a. A fastening nut 33 is fixed inside the flange portion 32. The sleeve 31 is an example of the "main body" in the claims. The fastening nut 33 is an example of the “female screw portion” and the “nut member” in the claims.

The fixing screw 40 includes a screw head 41 having a diameter L6, and a body portion 42 having a diameter L7 (smaller than the diameter L6) connected to the screw head 41. The diameter L6 of the screw head 41 is smaller than the diameter L2 of the through hole 20a and is substantially equal to the diameter (outer diameter) L4 of the sleeve 31 of the rubber nut 30. The diameter L7 of the body portion 42 is slightly smaller than the inner diameter L3 of the sleeve 31 of the rubber nut 30. Thereby, the body portion 42 of the fixing screw 40 can be inserted into (the cavity 31a of) the sleeve 31 of the rubber nut 30 and can be fastened to the fastening nut 33 fixed to the flange portion 32 of the rubber nut 30.

With the above configuration, in the first embodiment, the fixing screw 40 is inserted into the through hole 11a and the through hole 20a from the protective cover 20 side (X1 side), and the fixing screw 40 (the body 42 of the fixing screw 40) is inserted into the frame body 11. The protective cover 20 can be attached to the frame body 11 by being fastened to the fastening nut 33 provided on the side (X2 side).

Specifically, as shown in FIG. 7, in the first embodiment, in the state where the protective cover 20 is arranged on the frame body 11, the fixing screw 40 inserts the through hole 20a and the through hole 11a from the protective cover 20 side. The rubber nut 30 is bent through the rubber nut 30 and is fastened to the fastening nut 33 provided on the frame 11 side so that the rubber nut 30 flexes more than the diameter L2 of the through hole 20a on the screw head 41 side ( Configured to be deformed). In addition, in the first embodiment, the fastening of the fixing screw 40 to the fastening nut 33 is loosened while the engagement state of the fixing screw 40 with the fastening nut 33 is maintained, so that the rubber nut on the screw head 41 side. The flexure is relaxed so that 30 becomes smaller than the diameter L2 of the through hole 20a (see FIG. 6), and the protective cover 20 is configured to be removable from the frame body 11.

Next, attachment and removal of the protective cover 20 with respect to the frame 11 will be described.

First, as shown in FIG. 4, until the step portion 43 of the rubber nut 30 comes into contact with the X2 side of the frame body 11, the sleeve of the rubber nut 30 is inserted from the X2 side of the frame body 11 into the through hole 20a of the frame body 11. 31 is inserted. As a result, the step 43 of the rubber nut 30 is engaged with the edge of the through hole 11a of the frame 11. Further, the sleeve 31 of the rubber nut 30 is in a state of protruding toward the X1 side of the frame body 11.

Then, as shown in FIG. 5, the body portion 42 of the fixing screw 40 is inserted into the sleeve 31 (the cavity 31 a) of the rubber nut 30 from the X1 side, and the body portion 42 is fastened to the fastening nut 33. As a result, the rubber nut 30 and the fixing screw 40 are fixed to the frame body 11.

Then, as shown in FIG. 6, in a state where the rubber nut 30 and the fixing screw 40 are fixed to the frame body 11, the screw head 41 of the fixing screw 40 and the sleeve 31 of the rubber nut 30 are inserted into the through hole of the protective cover 20. Insert into 20a. As a result, the protective cover 20 is arranged near the surface of the frame 11 on the X1 side. Although FIG. 6 shows the state where the protective cover 20 contacts the frame body 11, the protective cover 20 may be arranged at least on the frame body 11 (X2 side) with respect to the screw head 41.

Then, as shown in FIG. 7, the fixing screw 40 is fastened to the fastening nut 33 from the protective cover 20 side (X1 side). Then, the distance between the screw head 41 of the fixing screw 40 and the protective cover 20 becomes smaller. As a result, a part of the sleeve 31 (a portion protruding from the through hole 20a of the protective cover 20) is on the screw head 41 side (on the side opposite to the frame 11 side (X2 side) on the protective cover 20 (X1 side)). At, the sleeve 31 flexes (elastically deforms) outward in the radial direction. Then, a part of the sleeve 31 is bent to a diameter L4a larger than the diameter L2 of the through hole 20a, and the fixing screw 40 is held until the bent portion comes into contact with the surface of the protective cover 20 on the X1 side. The protection cover 20 is fixed to the frame body 11 by being tightened.

Further, by performing the steps of FIGS. 6 and 7 in reverse, the protective cover 20 can be removed from the frame body 11 without removing the rubber nut 30 and the fixing screw 40 from the frame body 11. That is, by bending the sleeve 31, the protective cover 20 is fixed to the frame body 11 (the state of FIG. 7), and the tightening of the fixing screw 40 to the fastening nut 33 is eased. On the side (X1 side) opposite to the frame 11 side (X2 side) of the protective cover 20, the sleeve 31 returns to the state in which the bending is eliminated (state in FIG. 6). This makes it possible to easily remove only the protective cover 20 from the frame 11 without removing the rubber nut 30 and the fixing screw 40 from the frame 11.

(Effect of the first embodiment)
In the first embodiment, the following effects can be obtained.

In the first embodiment, as described above, in the state where the protective cover 20 is arranged on the frame body 11, the fixing screw 40 extends from the protective cover 20 side to the through hole 20a and the through hole 20a and the through hole 20a and the penetrating hole 20a. The rubber nut 30 is larger than the diameter L2 of the through hole 20a on the screw head 41 side by being fastened to the fastening nut 33 provided on the frame body 11 side while the rubber nut 30 is inserted through the hole 11a. Configured to be bent. As a result, since the rubber nut 30 is flexed more than the diameter L2 of the through hole 20a on the screw head 41 side, the frame 11 and the protective cover 20 are restrained from being released from the frame while the frame is blocked. The protective cover 20 can be fixed to the body 11. Further, since the degree of bending of the rubber nut 30 can be reduced by loosening the fastening of the fixing screw 40 to the fastening nut 33, the degree of bending of the rubber nut 30 is reduced until it becomes smaller than the diameter L2 of the through hole 20a. By doing so, the fixation of the protective cover 20 to the frame 11 can be released. Further, since the diameter L6 of the screw head 41 is smaller than the diameter L2 of the through hole 20a, the through hole 20a is protected so as to be inserted into the screw head 41 in a state where the fastening screw 33 is loosely fastened. By moving the cover 20 away from the frame body 11, the protective cover 20 can be removed from the frame body 11 without removing the fixing screw 40 from the fastening nut 33. As a result, the protective cover 20 can be easily removed from the frame body 11 while suppressing the release of the fixation between the frame body 11 and the protective cover 20.

Further, in the first embodiment, as described above, the fastening of the fixing screw 40 to the fastening nut 33 is performed in the state where the engagement state of the power receiving and transforming equipment casing 100a with the fastening nut 33 of the fastening screw 40 is maintained. Is loosened, the bending is relaxed on the screw head 41 side so that the rubber nut 30 becomes smaller than the diameter L2 of the through hole 20a, and the protective cover 20 is removable from the frame body 11. Accordingly, the protective cover 20 can be removed from the frame body 11 while the engagement state of the fixing screw 40 with the fastening nut 33 is maintained. Therefore, even if the fixing screw 40 is not removed from the fastening nut 33, The protective cover 20 can be reliably and easily removed from the frame 11.

Further, in the first embodiment, as described above, a plurality of through holes 11a of the frame body 11 and a plurality of through holes 20a of the protective cover 20 are provided. Then, the diameter L2 of the through hole 20a is configured to be larger than the diameter L1 of the through hole 11a. Accordingly, since the diameter L2 of the through hole 20a is larger than the diameter L1 of the through hole 11a, the protective cover 20 is moved relative to the frame body 11, so that the through hole 11a and the through hole 20a are seen in a plan view. And can be easily communicated with each other. As a result, due to the processing error, even if the positions of the plurality of through holes 20a of the protective cover 20 with respect to the plurality of through holes 11a of the frame body 11 are deviated, the protective cover 20 cannot be attached to the frame body 11. Can be suppressed.

In addition, in the first embodiment, as described above, the rubber nut 30 is connected to the sleeve 31 that is inserted into both the through hole 11a and the through hole 20a from the protective cover 20 side, and the frame body 11. A flange portion 32 having a diameter L5 larger than the diameter L4 of the sleeve 31 and disposed on the side opposite to the protective cover 20 side. The fastening nut 33 includes the fastening nut 33 fixed to the flange portion 32. Thereby, the step portion 43 between the sleeve 31 of the rubber nut 30 and the flange portion 32 can be engaged with the edge portion of the through hole 11 a of the frame body 11. Then, with the step portion 43 of the rubber nut 30 engaged with the edge portion of the through hole 11 a of the frame body 11, the fixing screw 40 is fastened (screwed) to the fastening nut 33, so that the sleeve 31 can be easily attached. Can be flexed.

[Second Embodiment]
The second embodiment will be described with reference to FIGS. In the second embodiment, unlike the first embodiment in which the portion where the fixing screw 40 is fastened (fastening nut 33) is provided in the rubber nut 30, the portion where the fixing screw 40 is fastened (female screw portion 211b) is different. It is provided on the frame body 211. In addition, in the figure, the same reference numerals are given to the parts having the same configurations as those of the first embodiment.

As shown in FIG. 8, a frame body 211 is provided inside the power receiving and transforming equipment casing 200a (see FIG. 1) used in the power receiving and transforming equipment 200 according to the second embodiment of the present invention. As shown in FIG. 12, the protective cover 20 is configured to be fixed to the frame body 211 by the sleeve 230, the frame body 211, and the fixing screw 40. The frame body 211 is an example of the "mounting portion" in the claims. The sleeve 230 is an example of the “flexible member” in the claims.

As shown in FIG. 8, a through hole 211 a is formed in the frame body 211. In the second embodiment, the diameter L21 of the through hole 211a formed in the frame 211 is smaller than the diameter L2 of the through hole 20a. A female screw portion 211b is formed on the inner peripheral surface of the through hole 211a of the frame body 211. Thereby, the fixing screw 40 can fasten the body portion 42 to the through hole 211 a (female screw portion 211 b) of the frame body 211. The through hole 211a is an example of the "first through hole" in the claims.

The sleeve 230 has substantially the same configuration as the sleeve 31 of the power receiving and transforming equipment 100. That is, the sleeve 230 is formed in a tubular shape (inner cavity 230a) having an inner diameter L3 and an outer diameter L24 (slightly smaller than the diameter L2 of the through hole 11a). The inner diameter L3 of the sleeve 230 is slightly larger than the through hole 211a of the frame body 211. The outer diameter L24 of the sleeve 230 is smaller than the through hole 211a of the frame body 211. As a result, unlike the sleeve 31 of the power receiving and transforming equipment 100 of the first embodiment, the sleeve 230 is not inserted into the through hole 211a but is inserted only into the through hole 20a.

With the above configuration, in the second embodiment, the fixing screw 40 is inserted into the through hole 211a from the protective cover 20 side (X1 side), and the fixing screw 40 (the body portion 42 thereof) is formed in the frame body 211. The protective cover 20 can be attached to the frame body 211 by being fastened to the through hole 211a.

Specifically, as shown in FIG. 12, in the second embodiment, in the state where the protective cover 20 is arranged on the frame body 211, the fixing screw 40 moves the through hole 211a and the through hole 211a from the protective cover 20 side. With the sleeve 230 inserted therethrough, the sleeve 230 is fastened to the female screw portion 211b provided on the frame body 211 side so that the sleeve 230 flexes more than the diameter L2 of the through hole 20a on the screw head 41 side. It is configured (to be deformed). Further, in the second embodiment, the fastening of the fixing screw 40 to the female screw portion 211b is loosened while the engagement state of the fixing screw 40 with the female screw portion 211b is maintained, so that the screw head 41 side The bending is relaxed so that the sleeve 230 becomes smaller than the diameter L2 of the through hole 20a (see FIG. 11), and the protective cover 20 is configured to be removable from the frame body 211.

Next, attachment and removal of the protective cover 20 with respect to the frame body 211 will be described.

First, as shown in FIG. 9, the sleeve 230 is arranged on the X1 side of the frame body 211 so that the cavity 230a inside the sleeve 230 and the through hole 211a of the frame body 211 communicate with each other. Then, as shown in FIG. 10, the body portion 42 of the fixing screw 40 is inserted into (the inner cavity 230a of) the sleeve 230, and the body portion 42 becomes the female screw portion 211b formed in the through hole 211a of the frame body 211. It is concluded. As a result, the sleeve 230 and the fixing screw 40 are fixed to the frame body 211.

Then, as shown in FIG. 11, with the sleeve 230 and the fixing screw 40 fixed to the frame body 211, the screw head 41 of the fixing screw 40 and the sleeve 230 are inserted into the protective cover 20. As a result, the protective cover 20 is placed in the vicinity of the protective cover 20 side (X1 side) of the frame body 211. Although FIG. 11 shows the state where the protective cover 20 is in contact with the frame body 211, the protective cover 20 may be disposed at least on the frame body 211 (X2 side) with respect to the screw head 41.

Then, as shown in FIG. 12, the fixing screw 40 is tightened from the protective cover 20 side (X1 side) into the through hole 211a of the frame body 211. Then, the distance between the screw head 41 of the fixing screw 40 and the protective cover 20 becomes smaller. As a result, a part of the sleeve 230 bends outward in the radial direction of the sleeve 230 on the screw head 41 side (the side (X1 side) opposite to the frame body 211 side (X2 side) of the protective cover 20) ( Elastically deforms). Then, a part of the sleeve 230 is bent to a diameter L24a larger than the diameter L2 of the through hole 20a, and the fixing screw 40 is held until the bent portion comes into contact with the surface of the protective cover 20 on the X1 side. The protection cover 20 is fixed to the frame body 211 by being tightened.

Further, by performing the steps of FIGS. 11 and 12 in reverse, the protective cover 20 can be removed from the frame body 211 without removing the sleeve 230 and the fixing screw 40 from the frame body 211. That is, the bending of the sleeve 230 relaxes the tightening of the fastening nut 33 of the fixing screw 40 from the state where the protective cover 20 is fixed to the frame body 211 (the state of FIG. 12). On the side (X1 side) opposite to the frame body 211 side (X2 side) of the protective cover 20, the sleeve 230 returns to the state in which the bending is eliminated (the state in FIG. 11). This makes it possible to easily remove only the protective cover 20 from the frame body 211 without removing the sleeve 230 and the fixing screw 40 from the frame body 211.

The other configuration of the power receiving and transforming equipment 200 according to the second embodiment is the same as that of the first embodiment.

(Effects of Second Embodiment)
In the second embodiment, the following effects can be obtained.

In the second embodiment, as described above, when the power receiving and transforming equipment casing 200a has the protective cover 20 arranged on the frame body 211, the fixing screw 40 is inserted from the protective cover 20 side through the through hole 20a. In addition, the sleeve 230 is inserted through the sleeve 230 and is fastened to the female screw portion 211b provided on the frame body 211 side, so that the sleeve 230 is flexed to a larger extent than the diameter L2 of the through hole 20a on the screw head 41 side. Configure as follows. As a result, the sleeve 230 is bent more than the diameter L2 of the through hole 20a on the side of the screw head 41, so that the frame body 211 and the protective cover 20 are prevented from being fixed to each other, and the frame is prevented. The protective cover 20 can be fixed to the body 211. Further, since the degree of bending of the sleeve 230 can be reduced by loosening the fastening of the fixing screw 40 to the female screw portion 211b, the degree of bending of the sleeve 230 is reduced until the diameter becomes smaller than the diameter L2 of the through hole 20a. By doing so, the fixing of the protective cover 20 to the frame body 211 can be released. Further, since the diameter L6 of the screw head 41 is smaller than the diameter L2 of the through hole 20a, the through hole 20a can be inserted into the screw head 41 in a state where the fastening of the fixing screw 40 to the female screw portion 211b is loosened. The fixing screw 40 can be removed from the through hole 211a by moving the protective cover 20 away from the frame body 211. As a result, as in the first embodiment, the protective cover 20 can be easily removed from the frame body 211 while restraining the fixing of the frame body 211 and the protective cover 20 from being released.

In addition, in the second embodiment, as described above, the sleeve 230 is configured to be inserted into the through hole 20a from the protective cover 20 side. Then, the female screw portion 211b is provided in the through hole 211a of the frame body 211. Accordingly, since the female screw portion 211b is provided in the through hole 211a of the frame body 211, it is possible to suppress an increase in the number of parts unlike the case where a nut member to be fastened to the fixing screw 40 is separately provided. ..

The other effects of the second embodiment are similar to those of the first embodiment.

[Modification]
The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications (modifications) within the scope.

For example, in the above-described first embodiment, an example in which the diameter L5 of the flange portion 32 is configured to be larger than the diameter L2 of the through hole 20a of the protective cover has been shown, but the present invention is not limited to this. In the present invention, the diameter L5 of the flange portion 32 may be smaller than the diameter L2 of the through hole 20a of the protective cover. However, the diameter L5 of the flange portion 32 needs to be at least larger than the diameter L1 of the through hole 11a.

In addition, in the first and second embodiments, the diameter L6 of the screw head 41 of the fixing screw 40 is smaller than the diameter L2 of the through hole 20a, and the diameter (outer diameter) of the sleeve 31 (sleeve 230) of the rubber nut 30. Although an example in which it is configured to be substantially equal to L4 has been shown, the present invention is not limited to this. In the present invention, the diameter L6 of the screw head 41 of the fixing screw 40 may be substantially equal to the diameter (outer diameter) L4 of the sleeve 31 (sleeve 230) of the rubber nut 30. However, the diameter L6 of the screw head 41 of the fixing screw 40 needs to be at least smaller than the diameter L2 of the through hole 20a.

Further, instead of the frame body 211 of the second embodiment, as in the power receiving and transforming equipment 300 shown in FIG. 13, the thickness of the portion 311b in which the through hole 311a is formed is the same as that of the portion in which the through hole 311a is not formed. You may comprise so that the frame 311 larger than thickness may be provided. Accordingly, even if the thickness of the frame 311 is small, the “female screw portion” for fastening the fixing screw 40 can be easily formed. The through hole 311a is an example of the "first through hole" in the claims. The frame body 311 is an example of the "mounting portion" in the claims.

In the first and second embodiments, an example in which a plurality of “first through holes” in the claims and a plurality of “second through holes” in the claims are provided is shown. However, the present invention is not limited to this. It is not limited to this. In the present invention, one first through hole and one second through hole may be provided.

1 Power receiving/transforming section 11a, 211a, 311a Through hole (first through hole)
11, 211, 311 Frame (mounting part)
20a through hole (second through hole)
20 Protective cover (cover member)
30 Rubber nut (flexible member)
31 Sleeve (main body)
32 flange part 33 fastening nut (female screw part, nut member)
40 fixing screw (screw member)
41 screw head 42 body (of screw member) 100, 200, 300 power receiving and transforming equipment 100a, 200a, 300a housing, power receiving and transforming equipment housing 211a through hole (first through hole, female screw portion)
230 Sleeve (Flexible member)
L1 (first through hole) diameter L2 (second through hole) diameter L4, L4a (main body portion) diameter L5 (flange portion) diameter L6 (screw head portion) diameter

Claims (6)

A casing for substation equipment including a distribution board or a distribution board,
A mounting portion that is disposed inside the power receiving and transforming equipment casing and has a first through hole formed therein;
A second through hole is formed, and a cover member attached to the attachment portion,
A screw member provided with a screw head portion having a diameter smaller than the diameter of the second through hole, and a body portion;
A flexible member having flexibility into which the body portion of the screw member is inserted;
Equipped with
The flexible member is inserted into at least the second through hole of the first through hole and the second through hole,
In a state in which the cover member is arranged in the mounting portion, the screw member is inserted from the cover member side through the second through hole and the first through hole and the flexible member. The power receiving and transforming equipment, wherein the flexible member is flexed to be larger than the diameter of the second through hole on the screw head side by being fastened to a female screw part provided on the mounting part side. Case for. By loosening the fastening of the screw member to the female screw portion in a state where the engagement state of the screw member with the female screw portion is maintained, the flexible member is provided on the screw head side. The power receiving and transforming equipment casing according to claim 1, wherein the cover member is configured to be detachable from the mounting portion by reducing the bending so as to be smaller than the diameter of the second through hole. A plurality of the first through holes of the attachment portion and a plurality of the second through holes of the cover member are provided,
The casing for substation equipment according to claim 1 or 2, wherein a diameter of the second through hole is larger than a diameter of the first through hole. The flexible member is
A main body part that is inserted from both the first through hole and the second through hole from the cover member side;
A flange portion that is connected to the main body portion, is disposed on the side opposite to the cover member side of the mounting portion, and has a diameter larger than the diameter of the main body portion,
Including
The power receiving and transforming equipment casing according to claim 1, wherein the female screw portion includes a nut member fixed to the flange portion. The flexible member is configured to be inserted into the second through hole from the cover member side,
The power receiving and transforming equipment casing according to claim 1, wherein the female screw portion is provided in the first through hole of the mounting portion. A power receiving and transforming unit including a switchboard or a distribution board,
A housing that houses the power receiving and transforming unit,
Prepare,
The housing is
A mounting portion having a first through hole,
A second through hole is formed, and a cover member attached to the attachment portion,
A screw member provided with a screw head having a diameter smaller than the diameter of the second through hole, and a body.
A flexible member having flexibility into which the body portion of the screw member is inserted,
The flexible member is inserted into at least the second through hole of the first through hole and the second through hole,
In a state in which the cover member is arranged in the mounting portion, the screw member is inserted from the cover member side through the second through hole and the first through hole and the flexible member. The power receiving and transforming equipment, wherein the flexible member is flexed to be larger than the diameter of the second through hole on the screw head side by being fastened to a female screw part provided on the mounting part side. ..

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