Box and box fixing structure

Abstract

To facilitate an assembly by separating a structure of a peripheral wall and a bottom wall constructing a box body.SOLUTION: A box body includes: a peripheral wall C in which opens 4 and 5 are formed in front and back sides; a bottom wall B providing a block part blocking the open 5 in the rear side of the peripheral wall C; and a lid wall D that is openly and closely moved between a position covering the open 4 in the front side of the peripheral wall C and an open position opening the open 4 in the front side. In the peripheral wall C, a bottom wall assembly part that can assembly the bottom wall B by a screw operation of a vis 91 from the open 4 in the front side; and a lid wall assembly part that can assembly the lid wall from the front side are provided. The bottom wall B and the lid wall D can be integrally constructed so as to be assembled to the peripheral wall C by the operation from the front side.SELECTED DRAWING: Figure 18

Description

[Technical Field]

[0001] The present invention relates to a box used as a distribution box that houses electrical equipment such as communication equipment and breakers, and a fixing structure for the box. [Background technology]

[0002] The basic configuration of the above-described box is such that the rear opening (rear opening) of the peripheral wall is closed by a bottom wall, and the front opening is closed by an openable / closable lid wall. One such box is disclosed in Patent Document 1, and the specification thereof states in paragraph "0015," lines 4-6, that "...and the rear cover 8 is fixedly attached to the box 2 by welding the rear edge of the peripheral wall 16 to the rear edge of the box 2 by fiber laser welding 17, with the peripheral wall 16 of the front panel 14 fitted into the rear opening 4 of the box 2."

[0003] In this way, in Cited Document 1, the peripheral wall and the bottom wall are integrated by welding, so it is necessary to first integrate the peripheral wall and the bottom wall by welding, and then fix the bottom wall or the peripheral wall to the structure in this state, thereby fixing the entire box to the structure. Therefore, when the box is large, it is necessary to assemble the peripheral wall and the bottom wall into one body by, for example, inverting or turning over the peripheral wall that constitutes the box, which makes the assembly itself troublesome and time-consuming.

[0004] Furthermore, when installing necessary communication or electrical equipment inside the housing, it is necessary to do so with the surrounding walls still present. This means that there are restrictions on the installation of the equipment due to interference with the surrounding walls, or if the bottom wall is usable but only the surrounding walls are damaged, it is necessary to replace the entire housing. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-76431 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to make the peripheral wall and bottom wall that make up the box body separate structures, thereby facilitating assembly even for large boxes, and also to make the installation of equipment easier by assembling the peripheral wall to the bottom wall after installing the necessary equipment on the bottom wall. [Means for solving the problem]

[0007] The invention of claim 1 to solve the above problem is: A peripheral wall having openings formed at the front and rear; a bottom wall having a closing portion that closes the rear opening of the peripheral wall; a covering position for covering the front opening of the peripheral wall; Opening up a cover wall that opens and closes between the open and closed positions, The peripheral wall is provided with a bottom wall assembly portion that allows the bottom wall to be assembled by screwing a screw through the front opening, and a cover wall assembly portion that allows the cover wall to be assembled from the front, The bottom wall and the cover wall can be assembled to the peripheral wall by operation from the front and integrated. can be, The bottom wall assembly portion is formed in a plurality of positions spaced apart from one another in the circumferential direction of the peripheral wall, and at least one of the bottom wall assembly portions is a locking portion provided on the inner surface of the peripheral wall; a connecting device that is separate from the peripheral wall and that is disposed inside the peripheral wall and has a fixing portion that is fixed to the bottom wall with a screw and a locking portion that is locked to the locked portion; The connector is configured to press the rear open end of the peripheral wall, to which the connector is engaged, toward the bottom wall. It is characterized by the following.

[0008] The peripheral wall and bottom wall constituting the housing of the invention of claim 1 are integrally assembled via a bottom wall assembly portion provided on the peripheral wall, i.e., the peripheral wall and bottom wall are separate structures, and the peripheral wall can be assembled to the bottom wall by operation from the front. The cover wall can also be assembled to the peripheral wall by operation from the front.

[0009] As a result, the bottom wall and the cover wall can be assembled to the peripheral wall simply by operating the peripheral wall from the front, without having to invert or tip the peripheral wall, making the assembly work itself particularly easy for large boxes. Furthermore, the peripheral wall can be assembled to the bottom wall after the necessary equipment has been installed on the bottom wall, facilitating the installation of the equipment. Furthermore, the peripheral wall can be assembled to the bottom wall with only the bottom wall fixed to the structure to which the box is fixed. If the peripheral wall is damaged for some reason during long-term use, only the peripheral wall can be replaced.

[0010] Furthermore, according to the invention of claim 1, when the peripheral wall and the bottom wall are arranged in an assembled state and the fixing portion of the connector is fixed to the bottom wall with a screw, the locking portion of the connector locks with the locked portion of the peripheral wall, preventing the peripheral wall and the bottom wall from moving away from each other, and the peripheral wall and the bottom wall are assembled via the connector in a state in which the rear end face of the peripheral wall is pressed against the bottom wall. When the locked portion of the peripheral wall and the locking portion of the connector are engaged with each other, the rear end face of the peripheral wall presses against the bottom wall, so that the locked state is stabilized by the reaction force of the pressing force, and the assembled state of the peripheral wall and the bottom wall is stabilized. The assembly strength of the peripheral wall and the bottom wall can be adjusted by selecting the arrangement position and number of connectors. Furthermore, the peripheral wall and bottom wall are connected and fixed together, and the locking portion of the connector that locks with the lockable portion of the peripheral wall can be positioned close to or in contact with the inner surface of the peripheral wall. Therefore, the locking portion of the connector, particularly the locking portion of the connector positioned at the middle of the side of each plate portion of the peripheral wall, can prevent the plate portions that make up the peripheral wall from bending inward.

[0011] The invention of claim 2 is as follows: A peripheral wall having openings formed at the front and rear; a bottom wall having a closing portion that closes the rear opening of the peripheral wall; a covering position for covering the front opening of the peripheral wall; Opening up a cover wall that opens and closes between the open and closed positions, The peripheral wall is provided with a bottom wall assembly portion that allows the bottom wall to be assembled by screwing a screw through the front opening, and a cover wall assembly portion that allows the cover wall to be assembled from the front, The bottom wall and the cover wall can be assembled to the peripheral wall by operation from the front and integrated. can be, the peripheral wall is attached to the bottom wall by screws threaded into a plurality of bottom wall attachment portions formed at intervals in the circumferential direction of the peripheral wall, Between the plurality of bottom wall assembly portions, A deflection prevention tool is provided, which is disposed inside the peripheral wall and has an abutment portion that abuts against the inner surface of the peripheral wall, and is fixed to the bottom wall by a screw that is screwed in from the front, preventing the peripheral wall from deflecting inward. It is characterized by the following.

[0012] According to the invention of claim 2, In addition to the effects described in paragraphs "0008" and "0009" of the invention of claim 1, between the multiple bottom wall assembly parts that assemble the bottom wall integrally with the peripheral wall, there are provided deflection prevention devices that prevent the peripheral wall from deflecting inward by abutting parts that abut against the inner surface of the peripheral wall. Therefore, even if the box is large and the connecting devices are far apart, the deflection prevention devices can effectively prevent the peripheral wall from deflecting inward.

[0013] Claim 3 The invention of claim 1 or 2 The invention is characterized in that a packing is provided which is sandwiched between the inner surface of the bottom wall and the rear end face of the peripheral wall.

[0014] Claim 3According to the invention, the connecting force between the peripheral wall and the bottom wall along the front-to-rear direction of the peripheral wall can be utilized to compress the gasket sandwiched between the inner surface of the bottom wall and the rear end face of the peripheral wall, thereby improving the airtightness and watertightness of the assembly portion between the peripheral wall and the bottom wall of the assembly structure.

[0015] Claim 4 The invention is 3 In the invention of the above, the bottom wall has an outer overlapping portion that is erected forward so as to cover and surround the entire outer side of the rear end portion of the peripheral wall, an inner overlap portion that faces the outer overlap portion in the inward / outward direction of the peripheral wall and forms an insertion groove portion into which a rear end portion of the peripheral wall is inserted, The insertion groove is provided with a packing that is held between the bottom surface of the insertion groove and the rear end surface of the peripheral wall.

[0016] Claim 4 According to the invention, the entire circumferential direction of the rear end of the peripheral wall is inserted into the insertion groove formed by the overlapping portions on the outer and inner sides of the bottom wall, which has the advantage that deflection of the rear end of the peripheral wall in the inward and outward directions can be suppressed, and the gasket placed in the insertion groove is automatically clamped and compressed by the assembly force (connecting force) between the peripheral wall and the bottom wall.

[0017] Claim 5 The invention of claim 1 or 2 In the invention, the peripheral wall has a rectangular frame shape, and a plurality of bottom wall mounting portions are provided on the peripheral wall, and at least one of the bottom wall mounting portions is formed in the middle of one of the sides that constitute the peripheral wall.

[0018] Claim 5According to the invention, the peripheral wall and bottom wall of a rectangular frame can be assembled not only at the corners of the peripheral wall but also at the middle of one of its sides, which makes the assembly work of the peripheral wall and bottom wall easier. Also, if the peripheral wall of a rectangular frame has long sides, assembly can be performed at the middle of the sides, which increases the assembly (fixing) strength between the peripheral wall and bottom wall of a rectangular frame with long sides, and if the required assembly strength between the peripheral wall and bottom wall can be obtained simply by assembling (fixing) the peripheral wall at the middle of each side, the assembly work becomes even easier.

[0019]

[0020] Claim 6 The invention of claim 1 is characterized in that it comprises a separate equipment mounting plate fixed to the bottom wall, and the equipment mounting plate can be attached to the bottom wall by an attachment operation from the front opening of the peripheral wall.

[0021] Claim 6 According to the invention, the equipment mounting plate can be attached to the bottom wall by operating the peripheral wall from the front, facilitating the installation of the equipment mounting plate. Also, since the peripheral wall can be attached to the bottom wall only by operating it from the front, various equipment can be installed on the equipment mounting plate attached to the bottom wall without any surrounding restrictions, even if the bottom wall is fixed to the structure and the peripheral wall is not attached to the bottom wall. This makes installation of the various equipment easy.

[0022] Claim 7 The invention of claim 1 or 2 The fixing structure of the box is characterized in that the bottom wall is fixed to a structure arranged behind the bottom wall of the box described above, and when the bottom wall is fixed, the peripheral wall can be removed from the bottom wall by operating the peripheral wall from the front.

[0023] Claim 7According to the invention, when the bottom wall is fixed to the structure, the peripheral wall can be attached and detached to the bottom wall simply by operating from the front. Therefore, when the bottom wall is fixed to the structure, it is possible to assemble a peripheral wall to the bottom wall, or to remove only the peripheral wall that has been damaged during use and assemble a different peripheral wall. [Effects of the Invention]

[0024] The present invention (Collective term for the inventions of claims 1 and 2) The peripheral wall and bottom wall that constitute the box are integrally assembled via a bottom wall assembly portion provided on the peripheral wall. Because the peripheral wall and bottom wall are separate structures, the peripheral wall can be assembled to the bottom wall from the front. This allows the bottom wall and cover wall to be assembled to the peripheral wall without inverting or tipping the peripheral wall, making the assembly work itself particularly easy for large boxes. Furthermore, the peripheral wall can be assembled to the bottom wall after necessary equipment has been installed on the bottom wall, facilitating the installation of the equipment. Furthermore, the peripheral wall can be assembled to the bottom wall while only the bottom wall is fixed to the structure to which the box is fixed. If the peripheral wall is damaged for some reason during long-term use, only the peripheral wall can be replaced. In particular, according to the invention of claim 1, when the peripheral wall and the bottom wall are arranged in an assembled state and the fixing portion of the connector is fixed to the bottom wall with a screw, the locking portion of the connector locks with the locked portion of the peripheral wall, preventing the peripheral wall and the bottom wall from moving away from each other, and the peripheral wall and the bottom wall are assembled via the connector in a state in which the rear end face of the peripheral wall is pressed against the bottom wall. When the locked portion of the peripheral wall and the locking portion of the connector are engaged with each other, the rear end face of the peripheral wall presses against the bottom wall, so that the locked state is stabilized by the reaction force of the pressing force, and the assembled state of the peripheral wall and the bottom wall is stabilized. The assembly strength of the peripheral wall and the bottom wall can be adjusted by selecting the arrangement position and number of connectors. Furthermore, the peripheral wall and bottom wall are connected and fixed together, and the locking portion of the connector that locks with the lockable portion of the peripheral wall can be positioned close to or in contact with the inner surface of the peripheral wall. Therefore, the locking portion of the connector, particularly the locking portion of the connector positioned at the middle of the side of each plate portion of the peripheral wall, can prevent the plate portions that make up the peripheral wall from bending inward. In particular, according to the invention of claim 2, between the plurality of bottom wall assembly parts that assemble the bottom wall integrally to the peripheral wall, a deflection prevention device is provided that prevents the peripheral wall from deflecting inward by abutting parts that abut against the inner surface of the peripheral wall. Therefore, even if the box is large and the connecting parts are far apart, the deflection prevention device can effectively prevent the peripheral wall from deflecting inward. [Brief explanation of the drawings]

[0025] [Figure 1] 1(a) and 1(b) are perspective views showing a pair of cover walls D of a distribution box A according to the present invention in an open state and a closed state, respectively. [Figure 2] 1 is an exploded perspective view of a peripheral wall C, a bottom wall B, and a pair of cover walls D that constitute a distribution box A according to the present invention. [Figure 3] 10(a) and 10(b) are perspective views of the peripheral wall C viewed from different directions. [Figure 4] 1 is a cross-sectional view (planar cross-sectional view) of the peripheral wall C. [Figure 5](a) is a side view of the peripheral wall C, (b) is a partial oblique view showing the assembly of the peripheral wall C and the upper end of the left-side cover wall D, and (c) is a partial oblique view showing the assembly of the peripheral wall C and the lower end of the left-side cover wall D. [Figure 6] (a), (b), and (c) are cross-sectional views along lines X1-X1 and X2-X2 in Figure 5(a) showing the combination of the upper and lower hinge connection portions of the peripheral wall C and the cover wall D when the opening angle of the left cover wall D is 60°, 90°, and 135°, respectively. [Figure 7] 10 is a vertical cross-sectional view of the lid wall assembly portion in a state where the left lid wall D is at an angle of 90° relative to the peripheral wall C and the lid wall D is lifted upward to be attached to or detached from the peripheral wall C. FIG. [Figure 8] 10 is a vertical cross-sectional view of the cover wall assembly portion when the angle of the left cover wall D relative to the peripheral wall C is 60°. FIG. [Figure 9] FIG. [Figure 10] This is also a front view. [Figure 11] FIG. [Figure 12] 11(a) and (b) are cross-sectional views taken along lines Y1-Y1 and Y2-Y2 in FIG. 10, respectively. [Figure 13] 10(a) and 10(b) are perspective views of a connector E for connecting and fixing a peripheral wall C and a bottom wall B, as viewed from different directions. [Figure 14] 1(a) and 1(b) are a front view and a central vertical cross-sectional view of a connector E. FIG. [Figure 15] 10 is a perspective view showing a state in which a peripheral wall C and a bottom wall B are connected and fixed by a plurality of connectors E via a packing H. FIG. [Figure 16] 10(a) to 10(c) are perspective views showing the order in which a peripheral wall C and a bottom wall B are connected together using a connector E. FIG. [Figure 17] 10 is a vertical cross-sectional view showing a state before the peripheral wall C and the bottom wall B are connected and fixed by a plurality of connecting members E via a packing H. FIG. [Figure 18] FIG. [Figure 19] FIG. 19 is an enlarged view of a portion indicated by Z in FIG. [Figure 20] 10 is a perspective view of a state in which an equipment mounting plate F is attached to a first recess 31 in a bottom wall B using a plurality of connectors E. FIG. [Figure 21] 10 is a vertical cross-sectional view of a state in which an equipment mounting plate F is attached to a bottom wall B. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0026] The present invention will be described in more detail below with reference to the best embodiment. A typical use of the box according to the present invention is a distribution box for storing various devices, such as communication devices and electrical devices. As shown in FIGS. 1 and 2, the distribution box A comprises a rectangular frame-shaped peripheral wall C, a rectangular disk-shaped bottom wall B formed separately from the peripheral wall C and closing the rear opening of the peripheral wall C, and a pair of cover walls D formed separately from the peripheral wall C and closing the front opening of the peripheral wall C. The peripheral wall C, bottom wall B, and cover wall D are all injection-molded resin components, each having a separate, integral structure. The distribution box A is formed by assembling these components. The inventive feature (characteristic feature) of the present invention resides in the "assembly structure" of the separate peripheral wall C, bottom wall B, and cover wall D. Therefore, the "assembly structure" will be described in detail. The general components other than the assembly sections of the peripheral wall C, bottom wall B, and cover wall D are not characteristic of the present invention, and therefore will be omitted or only briefly described.

[0027] The peripheral wall C has an overall rectangular (square) frame shape and is composed of an upper plate 1 and a lower plate 2 opposed vertically and a pair of side plates 3 opposed laterally. Both the front and rear are open, forming a front opening 4 and a rear opening 5, with the dimensions decreasing in the order of width, height, and depth. The pair of left and right side plates 3 are symmetrical, but the upper plate 1 and the lower plate 2 are not identical in shape because the shapes of their front ends, where a pair of cover walls D are placed in the "covering position," are different. The rear opening 5 of the peripheral wall C is closed by the rectangular plate-shaped bottom wall B being integrally assembled thereto. Therefore, the rear end surfaces of the upper plate 1, the lower plate 2, and the pair of side plates 3 are arranged on the same plane. However, the front opening 4 of the peripheral wall C, where the pair of cover walls D are placed, has different positions of its front end along the front-to-rear direction, forming a cover wall arrangement space 6 where the pair of cover walls D are placed.

[0028] The thickness of the upper plate portion 1, the lower plate portion 2, and the pair of side plate portions 3 that make up the peripheral wall C is constant over the entire length, and portions of the upper plate portion 1, the lower plate portion 2, and the pair of side plate portions 3 that face the rear opening 5 of a predetermined length constitute insertion plate portions 1a, 2a, 3a that are inserted into a rectangular frame-shaped insertion groove 36, described below, in the bottom wall B. On the inner surfaces of the upper plate portion 1, the lower plate portion 2, and the pair of side plate portions 3, inward of the insertion plate portions 1a, 2a, 3a, there are integrally formed locking projections 7 that are used to assemble the bottom wall B, which closes the rear opening 5 of the peripheral wall C, together with the insertion plate portions 1a, 2a, 3a, via connecting fixtures E, described below. 15 to 19, the locked projection 7 has a structure in which the locked plate portion 7a is formed integrally with the inner surfaces of the upper plate portion 1, the lower plate portion 2, and the pair of side plate portions 3 so as to be perpendicular to each other, and the side of the locked plate portion 7a facing the rear opening 5 is supported by a plurality of right-angled triangular support plate portions 7b. The locked projection 7 is formed in three places on the upper plate portion 1 and the lower plate portion 2: in the horizontal center and at both ends, and is formed in only one place on the pair of side plate portions 3, which are shorter in length than the upper plate portion 1 and the lower plate portion 2: in the vertical center.

[0029] A pair of cover walls D are arranged and connected in a "folding door structure" at the front opening 4 of the peripheral wall C using a pin connection structure, so that the front ends of the pair of side plate portions 3 have concave cover wall pivot fulcrum arrangement portions 8, where the pivot fulcrum portions of each cover wall D are arranged, formed over almost the entire length in the vertical direction, as shown in Figures 4 and 5, and the upper and lower ends (the tips of the upper plate portion 1 and the lower plate portion 2) on the side of the front opening 4 of the peripheral wall C are formed into a triple plate structure with a space in the middle in the vertical direction, as shown in Figure 17, so that the entire periphery of the front end side of the peripheral wall C where the pair of cover walls D are arranged is reinforced. 4, 5, and 17, the front end portions of the upper plate portion 1 and the lower plate portion 2 are bent inward by 90°, and the tips thereof are bent further inward by 90° to connect to the vertical front plate portions 1b, 2b, thereby forming first inner plate portions 1c, 2c that are parallel to the upper plate portion 1 and the lower plate portion 2 via a space, the rear end portions of the first inner plate portions 1c, 2c are bent inward by 90° to form rear plate portions 1d, 2d, and the ends of the rear plate portions 1d, 2d are bent forward by 90° to form second inner plate portions 1e, 2e. The cover wall pivot point arrangement portions 8 are formed in the vertical direction at both left and right ends of the first inner plate portions 1c, 2c and the second inner plate portions 1e, 2e in the peripheral wall C.

[0030] 5, the upper and lower ends of the cover wall rotation fulcrum arrangement portion 8 are provided with interference avoidance notches 9a, 9b to avoid interference with the rotation fulcrum pins 21a, 21b of the cover wall D and the fulcrum pin support plates 22a, 22b supporting the rotation fulcrum pins 21a, 21b. At the upper and lower ends of the rotation fulcrum portion of the cover wall D, with the cover wall D connected to the peripheral wall C, the fulcrum pin support plates 22a, 22b are provided integrally and parallel to the upper plate portion 1 and the lower plate portion 2 of the peripheral wall C, and the upper and lower fulcrum pin support plates 22a, 22b are provided with the rotation fulcrum pins 21a, 21b facing upward and downward, respectively, and arranged on the same axis. The pair of cover walls D can be attached and detached to and from the peripheral wall C only when the opening angle of the cover wall D to the peripheral wall C is 90°, allowing the cover wall D to move slightly up and down relative to the peripheral wall C, so that the rotation fulcrum pins 21a, 21b of the cover wall D can be attached and detached to and from the fulcrum pin holes 11a, 11b formed in the vertical extension of the cover wall rotation fulcrum arrangement portion 8 on each of the upper and lower plate portions 1, 2 of the peripheral wall C, but the rotation fulcrum pins 21a, 21b of the cover wall D cannot be attached and detached to and from the fulcrum pin holes 11a, 11b of the cover wall D in parts other than where the opening angle of the cover wall D is 90°.

[0031] The cover wall pivot support arrangement portion 8 formed in the vertical direction at both left and right ends of the front part of the peripheral wall C, as shown in Figures 3 to 6, corresponds to the maximum opening angle of the cover wall D relative to the peripheral wall C being 135°, and has a first plate portion 8b of a predetermined length extending tangentially forward from one end of a quarter-circular arc plate portion 8a that opens to the side in a cross-sectional view, and a second plate portion 8c formed by bending the tip of the first plate portion 8b at a right angle toward the side, and furthermore, a short third plate portion 8d is bent forward at a right angle from the tip of the second plate portion 8c, and the upper and lower ends of the third plate portion 8d are shaped to protrude slightly upward and downward relative to the second plate portion 8c.

[0032] The upper and lower fulcrum pin support plates 22a, 22b of the cover wall D are formed in an arc shape at the portions corresponding to the quarter-arc plate portions 8a of the cover wall rotation fulcrum arrangement portion 8 of the cover wall D when the cover wall D is attached to the peripheral wall C, and are also formed with orthogonal cutout portions 23 cut out at right angles to avoid interference with the second and third plate portions 8c, 8d of the cover wall rotation fulcrum arrangement portion 8 when the open angle of the cover wall D with respect to the peripheral wall C is 90°, resulting in a generally rectangular shape overall. An L-shaped rib-shaped gap closing portion 24b is formed on the outer peripheral edge of the fulcrum pin support plate 22b below the cover wall D and protrudes downward along the entire periphery to close the gap between the lower end of the cover wall D and the first inner plate portion 2c of the lower plate portion 2 of the peripheral wall C (see FIG. 5(c)). Meanwhile, an upward movement restricting portion 24a is formed on the outer peripheral edge of the fulcrum pin support plate 22a above the cover wall D. This restricts the upward movement of the cover wall D relative to the peripheral wall C only when the angle of the cover wall D relative to the peripheral wall C is 90°, and restricts the upward movement of the cover wall D relative to the peripheral wall C at other angles. In order to satisfy the above condition, as shown in FIG. 6(b), when the angle of the cover wall D relative to the peripheral wall C is 90°, the rib-shaped upward movement restricting portion 24a is omitted from the portion of the fulcrum pin support plate 22a of the cover wall D that extends inside the peripheral wall C, and the upward movement restricting portion 24a is formed only on the outer peripheral edge of the portion of the fulcrum pin support plate 22a that protrudes outside the peripheral wall C, in order to permit vertical movement (slight movement) of the cover wall D relative to the peripheral wall C. The upward movement restricting portion 24a also has the function of closing the space S formed between the fulcrum pin support plate 22a above the cover wall D and the first inner plate portion 1c of the upper plate portion 1 of the peripheral wall C.

[0033] When a pair of cover walls D are assembled to the peripheral wall C, as shown in Figure 8, the pivot pin 21a at the bottom of the cover wall D is inserted into the pivot pin hole 11a at the bottom of the peripheral wall C, the pivot pin 21a supports the weight of the cover wall D, and a predetermined space S is formed between the first inner plate portion 1c of the upper plate portion 1 of the peripheral wall C and the fulcrum pin support plate 22a above the cover wall D. When the opening angle of the cover wall D relative to the peripheral wall C is in the range of 90° to 135°, the upward movement of the cover wall D relative to the peripheral wall C is prevented by the upward movement regulating portion 24a entering the space S (see Figure 6(c)). When the opening angle is in the range of 0° to 90°, the upper fulcrum pin support plate 22a enters below the upward movement regulating block 12 described below, preventing the upward movement of the cover wall D relative to the peripheral wall C. Only when the opening angle is 90°, as shown in Figure 6(b), is the entire upward movement regulating portion 24a positioned outside the space S, and the upper fulcrum pin support plate 22a and the upward movement regulating block 12 are in a non-interfering state, allowing the cover wall D to move upward relative to the peripheral wall C.

[0034] In addition, a plate-shaped upward movement restricting block 12 is provided on the back surface of the first inner plate portion 1c of the upper plate portion 1 of the peripheral wall C in the portion corresponding to the cover wall rotation fulcrum arrangement portion 8 to prevent the cover wall D from moving upward when the opening angle of the cover wall D is between 0° and 90°.When the opening angle of the cover wall D is between 0° and 90°, the fulcrum pin support plate 22a above the cover wall D enters below the upward movement restricting block 12, thereby preventing the cover wall D from moving upward (Figure 6(a)).When the opening angle of the cover wall D reaches 90°, the fulcrum pin support plate 22a above the cover wall D escapes from the back surface of the upward movement restricting block 12, allowing the cover wall D to move upward (Figure 6(b)). In this way, in the upward movement restricting block 12, when the opening angle of the cover wall D relative to the peripheral wall C is 90°, a cover wall attachment / detachment guide surface 12a is formed which is parallel to one side of the upper fulcrum pin support plate 22a, and when the opening angle of the cover wall D relative to the peripheral wall C is 135°, a maximum opening angle restricting surface 12b is formed which restricts the maximum opening angle of the cover wall D by abutting the upward movement restricting portion 24a provided on the fulcrum pin support plate 22a above the cover wall D. In Figures 5 and 6, 25 and 26 indicate side plate portions and inner plate portions of the cover wall D.

[0035] As described above, the pair of cover walls D can be attached to and detached from the peripheral wall C only when the opening angle of the cover wall D with respect to the peripheral wall C is 90°. Therefore, as shown in Figures 6(b) and 7, the cover wall D is arranged at an opening angle of 90° with respect to the peripheral wall C, and in a state in which the cover wall D is slightly lifted and tilted with respect to the peripheral wall C, the cover wall D is moved toward the peripheral wall C as shown by arrow P in Figure 6(b), and the upper rotation fulcrum pin 21a of the cover wall D is inserted into the upper fulcrum pin hole 11a of the peripheral wall C, and the cover wall D is repositioned so that the line segment connecting the upper and lower rotation fulcrum pins 21a, 21b of the cover wall D is vertical, and in this state, the support of the cover wall D is released. As a result, the cover wall D moves slightly downward due to its own weight, and the lower pivot fulcrum pin 21b is inserted into the lower fulcrum pin hole 11b of the peripheral wall C, and the end face of the side of the upper fulcrum pin support plate 22a of the cover wall D opposite the side on which the orthogonal cutout portion 23 is provided is arranged parallel to the cover wall attachment / detachment guide surface 12a of the upward movement restricting block 12, so that one cover wall D is rotatably assembled to the peripheral wall C. To detach the cover wall D from the peripheral wall C after it has been assembled to the peripheral wall C, the reverse operation to the above is performed; by lifting the cover wall D upward and tilting it slightly, the lower pivot fulcrum pin 21b comes out of the lower fulcrum pin hole 11b of the peripheral wall C, and the cover wall D is then moved in the direction indicated by arrow P' in FIG. 6(b). As shown in Figure 5(c), a pin sliding guide groove portion 13 is formed in the fulcrum pin hole 11b below the peripheral wall C, along the direction of arrows P and P', which is the direction in which the cover wall D is attached and detached from the peripheral wall C, so that when the cover wall D is attached or detached, the lower end of the pivot fulcrum pin 21b below the cover wall D enters into the pin sliding guide groove portion 13, which facilitates the attachment and detachment operation of the cover wall D.

[0036] Here, as clearly shown in Figures 5 and 6, by providing an orthogonal notch 23 in the fulcrum pin support plate 22b below the cover wall D, when the opening angle of the cover wall D relative to the peripheral wall C is 90°, the bottom wall D can be moved slightly upward relative to the peripheral wall C without interfering with the second and third plate portions 8c, 8d that constitute the cover wall rotation fulcrum arrangement portion 8 of the peripheral wall C, and the rotation fulcrum pin 21b below the cover wall D can be released from the fulcrum pin hole 11b below the peripheral wall C, making it possible to remove the cover wall D from the peripheral wall C. 6(a) and 6(c), when the opening angle of the cover wall D relative to the peripheral wall C is other than 90°, both sides of the orthogonal notch 23 in the lower fulcrum pin support plate 22b of the cover wall D interfere with the second and third plate portions 8c and 8d of the peripheral wall C, preventing the cover wall D from moving upward relative to the peripheral wall C and making it impossible to remove the cover wall D from the peripheral wall C. Therefore, the lower fulcrum pin support plate 22b functions to prevent the cover wall D from coming off the peripheral wall C when the opening angle of the cover wall D relative to the peripheral wall C is other than 90°. As described above, the cover wall D can rotate smoothly between a "closed position" at an opening angle of 0°, which completely covers the front opening 4 of the peripheral wall C, and an "open position" at an opening angle of 135°, which is the maximum opening angle relative to the peripheral wall C, passing through an intermediate position at an opening angle of 90° at which the peripheral wall C and the cover wall D can be separated.

[0037] In Figure 7, the length L1 between the tips of the upper and lower pivot pins 21a, 21b of the cover wall D, the vertical spacing L2 between the upper and lower first inner plate portions 1c, 2c that make up the peripheral wall C, the protruding length L3 of the pivot pin 21a from the upper surface of the upper fulcrum pin support plate 22a, and the protruding length L4 of the lower pivot pin 21b from the lower end surface of the gap closing portion 24b of the cover wall D are set to dimensions that allow the cover wall D to be attached and detached to the above-mentioned peripheral wall C when the opening angle of the cover wall D relative to the peripheral wall C is 90°.

[0038] In the above state, when the cover wall D is rotated inward to set the opening angle to 60°, as shown in Figures 6(a) and 8, a part of the fulcrum pin support plate 22a above the cover wall D enters below the upward movement restricting block 12, preventing the cover wall D from moving (slightly) up and down relative to the peripheral wall C. In other words, the cover wall D can be opened and closed relative to the peripheral wall C while the upper and lower rotation fulcrum pins 21a, 21b of the cover wall D remain inserted without coming out of the fulcrum pin holes 11a, 11b of the cover wall D. For the sake of explanation, the attachment and detachment of the cover wall D to the peripheral wall C has been described above. However, in actual construction, the pair of cover walls D are attached to the peripheral wall C after the bottom wall B, which will be described later, is integrally attached to the rear end of the peripheral wall C.

[0039] In the above, the pair of upper and lower fulcrum pin holes 11a, 11b provided in the peripheral wall C, the pair of pivot fulcrum pins 21a, 21b provided in the cover wall D, and the pair of fulcrum pin support plates 22a, 22b constitute the ``cover wall assembly portion'' of claim 1.

[0040] Next, with reference to Figures 9 to 12, the bottom wall B for closing the rear opening 5 of the rectangular frame-shaped peripheral wall C will be described. The bottom wall B has a rectangular plate shape, and when assembled integrally with the peripheral wall C, its inner surface is recessed in two steps. The central portion, which occupies most of the bottom wall B, has a rectangular first recess 31 formed therein to accommodate an equipment mounting plate F for mounting various devices. A rectangular frame-shaped second recess 33 shallower than the first recess 31 is formed between the outside of the first recess 31 and an outer laminated plate portion 32 constituting the outermost portion of the bottom wall B, thereby forming a bottom plate portion 35 over the entire central portion. An attachment / detachment recess 34 is formed in the second recess 33 at the portion of the opposing short side of the first recess 31 that faces the first recess 31 approximately diagonally, to facilitate attachment and detachment of the equipment mounting plate F to and from the first recess 31. The outer laminated plate portion 32 has a rectangular frame shape overall, and both ends of its shorter sides are formed with outward bulges 32a that bulge outward slightly to facilitate insertion of the insertion plate portions 1a, 2a, 3a on the rear side of the peripheral wall C. A rectangular frame-shaped insertion groove 36 is formed around the entire periphery between the rectangular frame-shaped outer laminated plate portion 32 and the second recess 33, into which the insertion plate portions 1a, 2a, 3a of the peripheral wall C are inserted to integrate the peripheral wall C and the bottom wall B, and the inner part of the insertion groove 36 forms an inner laminated portion 37 (see FIG. 12 ) that opens into the outer laminated plate portion 32.

[0041] A plurality of first screw threading cylindrical portions 38 protrude from the inner portion of the insertion groove 36 on the bottom surface of the second recess 33, into which screws 91 for screwing in a connector E (described later) are to be screwed. The first screw threading cylindrical portions 38 are formed at three locations on the long sides of the rectangular bottom wall B (at both ends and the center) and at only one location on the short sides (at the center), corresponding to the positions of the engagement projections 7 formed on the upper plate portion 1, the lower plate portion 2, and the pair of side plate portions 3 of the peripheral wall C. Four pairs of bolt insertion holes 39, into which bolts 92 for fastening the bottom wall B to a structure are inserted, are formed in the bottom surface of the second recess 33 at portions corresponding to the corners of the first recess 31. Second screw threading cylindrical portions 41 are formed on each short side of the second recess 33 facing the first recess 31, by forming the periphery into a concave shape, so that the second screw threading cylindrical portions 41 are substantially flush with the bottom surface of the second recess 33. The second screw-receiving tube portion 41 is a portion into which screws 91 are screwed in to fix the periphery of the equipment mounting plate F housed and arranged in the first recess 31 with a plurality of connectors E. The bottom surface of the first recess 31 is formed with a plurality of vertical and horizontal reinforcing ribs 42.

[0042] Next, referring to Figures 13 to 16, a description will be given of a connector E used to assemble the bottom wall B integrally with the peripheral wall C. The connector E has a cylindrical connector main body 51 fitted around the outside of the first and second screw-in tube portions 38, 41 of the bottom wall B. A rectangular locking plate portion 52 corresponding to the shape of the locking plate portion 7a of the locking projection 7 integrally formed on the peripheral wall C is formed integrally with the connector main body 51 along the tangential direction at the front end of the connector main body 51. The cylindrical connector main body 51 has two types of through holes with different inner diameters formed continuously in the axial direction. The smaller diameter through hole on the locking plate portion 52 side serves as a screw bottom wall hole 51a, and the larger diameter through hole on the side where a pair of anti-rotation recesses 53 (described later) are formed serves as a screw-in tube portion fitting hole 51b for fitting the first and second screw-in tube portions 38, 41 of the peripheral wall C into the connector main body 51. The end surface of the connector body 51 of the connector E at the distal end is formed with a pair of anti-rotation recesses 53 having a triangular cross section. The anti-rotation recesses 53 are fitted with a pair of anti-rotation protrusions 43 having a triangular cross section and formed integrally with the opposing base ends of the first and second screw-insertion tube portions 38, 41 of the bottom wall B. A pair of digging-in claws 54 are formed on the back surface of the rectangular locking plate portion 52 along the short side at a predetermined interval along the longitudinal direction, so as to be able to dig into the surfaces of the locked plate portions 7a of the locked protrusions 7 of the bottom wall B. The connector E not only functions to integrally connect the peripheral wall C and the bottom wall B, but also functions to prevent the plates 1, 2, and 3 from bending inward by having the longitudinal end surfaces of the locking plate portions 52 serve as abutment surfaces 52a that abut against the inner surfaces of the upper plate portion 1, lower plate portion 2, and pair of side plate portions 3 of the peripheral wall C when the peripheral wall C and the bottom wall B are connected.

[0043] The peripheral wall C and the bottom wall B that closes the rear opening 5 of the peripheral wall C are integrated using a plurality of connecting devices E as follows: That is, as shown in Figures 16(a) and 17, a square-frame-shaped packing H is inserted into the insertion groove 36 formed in the bottom wall B and placed at the bottom thereof, and then, as shown in Figure 16(b), the insertion plate portions 1a, 2a, and 3a of the upper plate portion 1, the lower plate portion 2, and the pair of side plate portions 3 of the peripheral wall C are inserted into the insertion groove 36 of the bottom wall B, whereby the packing H placed at the bottom of the insertion groove 36 is slightly compressed.

[0044] Thereafter, the peripheral wall C and the bottom wall B are integrated using multiple connectors E. That is, as shown in Figures 15, 16(c), 18, and 19, the first screw threading cylindrical portion 38 of the bottom wall B is fitted into the screw bottom wall hole 51a of the connector body 51 of the connector E, and when the connector E is placed outside the first screw threading cylindrical portion 38, the locking plate portion 52 of the connector E comes into contact with the upper surfaces of the locking plate portions 7a of the locking projections 7 formed on the inner surfaces of the plates 1, 2, and 3 of the peripheral wall C. Finally, when the screws 91 inserted into the screw bottom wall holes 51a of the connector E are screwed into the first screw threading cylindrical portions 38, the peripheral wall C and the bottom wall B are integrated via the multiple connectors E at three locations, at both ends and the center, of the upper plate 1 and the lower plate 2, and at one location in the center of each of the pair of side plates 3. The above-mentioned operations of arranging the connectors E and screwing in the screws 91 can all be performed from the front (front side) of the peripheral wall C while keeping the peripheral wall C in a fixed position, without having to invert or turn the peripheral wall C over, which facilitates the assembly of the peripheral wall C and the bottom wall B. Furthermore, since the peripheral wall C and the bottom wall B can be integrated only from the front, it is also possible to first fix the bottom wall B to the structure K using a plurality of fixing bolts 92, and then connect and fix the peripheral wall C to the bottom wall B in this state.

[0045] When the peripheral wall C and the bottom wall B are connected and fixed using multiple connectors E as described above, the locking plate portions 52 of the connectors E are engaged with the locking projections 7 provided on the inner surfaces of the plates 1, 2, and 3 of the peripheral wall C, preventing relative movement between the peripheral wall C and the bottom wall B in the direction away from each other. At the same time, the peripheral wall C and the bottom wall B are connected and fixed via the multiple connectors E with the rear end faces of the plates 1, 2, and 3 of the peripheral wall C pressed against the bottom wall B. This compresses and deforms the packing H disposed between the bottom surface of the insertion groove 36 of the bottom wall B and the rear end faces of the plates 1, 2, and 3 of the peripheral wall C, improving the watertightness and airtightness of the assembly of the peripheral wall C and the bottom wall B. Because the peripheral wall C and the bottom wall B are connected and fixed internally, there are no external connecting and fixing parts, resulting in a neat and attractive appearance. In addition, a locked portion is formed on the inside of the portion of the peripheral wall that overlaps with the outer laminated plate portion, and the outer laminated plate portion prevents the locked portion from moving outward, so the locking portion is stably locked to the locked portion. The outer laminated plate portion acts as a movement preventing portion that prevents the locked portion from moving outward.

[0046] The reason why connectors E are disposed in the longitudinal center of each of the plates 1, 2, and 3 constituting the peripheral wall C is not only to integrate the peripheral wall C and the bottom wall B, but also to most effectively prevent inward deflection of each plate 1, 2, and 3 by arranging the locking plates 52 on connectors E close to the inner surfaces of each plate 1, 2, and 3, and connectors E also function as deflection preventers. Therefore, if priority is given to preventing inward deflection of each plate 1, 2, and 3, it is not necessarily necessary to provide locked projections 7 on the portions of each plate 1, 2, and 3 corresponding to connectors E disposed in the longitudinal center. Also, deflection preventers may be disposed between each of the three connectors aligned laterally on the upper plate 1 and the lower plate 2. In addition, a deflection prevention device may be placed between a connector on one of the lateral ends of the upper plate portion 1 or the lower plate portion 2 and a connector provided on the adjacent side plate portion 3 aligned in the circumferential direction of the peripheral wall C. The selection and number of connecting and fixing points between the peripheral wall C and the bottom wall B are determined taking into consideration the size of the distribution box A, the thickness of each of the plates 1, 2, and 3 that make up the peripheral wall C, etc.

[0047] In the above, the multiple engaging projections 7 formed on the peripheral wall C, the multiple first screw-insertion tube portions 38 formed on the bottom wall B, and the multiple connecting devices E constitute the ``bottom wall assembly portion'' of claim 1 for assembling the peripheral wall C and the bottom wall B together.

[0048] Finally, a pair of cover walls D are assembled to the peripheral wall C as described in paragraph "0034".

[0049] 1, 20, and 21, when installing equipment J such as communication equipment or electrical equipment inside the distribution box A, a rectangular board-shaped equipment mounting plate F is fitted into the first recess 31 in the bottom wall B, and the four bolt insertion holes 39 arranged around the periphery of the plate and the connectors E are used to press the peripheral portion of the equipment mounting plate F with the interlocking plate portions 7a of the connectors E, thereby fixing the equipment mounting plate F to the bottom wall B. The equipment J is attached to the front surface of the equipment mounting plate F. The interlocking plate portions 7a of the connectors E, which fix the equipment mounting plate F to the bottom wall B, function as pressing plates.

[0050] Here, when attaching equipment J to equipment mounting plate F fixed to bottom wall B, it is also possible to first fix only bottom wall B to structure K, attach equipment mounting plate F to bottom wall B, and then attach equipment J to equipment mounting plate F in this state. When equipment J is attached to equipment mounting plate F in this way, since there are no surrounding walls C, equipment J can be attached in a large, unrestricted space, making it possible to attach equipment J quickly and accurately.

[0051] The above-mentioned assembly structure of the pair of cover walls D to the peripheral wall C has the advantage that the cover walls D can be attached and detached to the peripheral wall C only when the opening angle of the cover walls D to the peripheral wall C is 90°, but the assembly structure of the pair of cover walls D to the peripheral wall may be any structure, including a general structure in which they are assembled by inserting and removing a separate fulcrum pin.

[0052] In the above embodiment, the connecting device E that fixes the equipment mounting plate F to the bottom wall B is shown to have the same shape as the connecting device that assembles the bottom wall B and the peripheral wall C together, but they may also be different dedicated parts. [Explanation of symbols]

[0053] A: Power distribution box B: Bottom wall C: Peripheral wall D: Lid wall E: Connector (bottom wall assembly part) F: Equipment mounting plate H: Packing K: Structure P, P': Direction of movement of the lid wall when attaching or detaching 11a, 11b: Pivot pin hole (lid wall assembly part) 21a, 21b: Pivot fulcrum pin (lid wall assembly part) 22a, 22b: Fulcrum pin support plate (lid wall assembly part) 32: Outer laminated plate part of the bottom wall (bottom wall assembly part) 36: Bottom wall insertion groove (bottom wall assembly part) 37: Inner overlapping part of the bottom wall (bottom wall assembly part)

Claims

1. A peripheral wall having openings formed at the front and rear; a bottom wall having a closing portion that closes the rear opening of the peripheral wall; a cover wall that opens and closes between a covering position that covers the front opening of the peripheral wall and an opening position that opens the front opening, The peripheral wall is provided with a bottom wall assembly portion that allows the bottom wall to be assembled by screwing a screw through the front opening, and a cover wall assembly portion that allows the cover wall to be assembled from the front, the bottom wall and the cover wall can be assembled to the peripheral wall by an operation from the front, and integrated; The bottom wall assembly portion is formed in a plurality of positions spaced apart from one another in the circumferential direction of the peripheral wall, and at least one of the bottom wall assembly portions is a locking portion provided on the inner surface of the peripheral wall; a connecting device that is separate from the peripheral wall and that is disposed inside the peripheral wall and has a fixing portion that is fixed to the bottom wall with a screw and a locking portion that is locked to the locked portion; The box is characterized in that the connector is configured to press the rear open end of the peripheral wall, to which the connector is engaged, toward the bottom wall.

2. A peripheral wall having openings formed at the front and rear; a bottom wall having a closing portion that closes the rear opening of the peripheral wall; a cover wall that opens and closes between a covering position that covers the front opening of the peripheral wall and an opening position that opens the front opening, The peripheral wall is provided with a bottom wall assembly portion that allows the bottom wall to be assembled by screwing a screw through the front opening, and a cover wall assembly portion that allows the cover wall to be assembled from the front, the bottom wall and the cover wall can be assembled to the peripheral wall by an operation from the front, and integrated; the peripheral wall is attached to the bottom wall by screws threaded into a plurality of bottom wall attachment portions formed at intervals in the circumferential direction of the peripheral wall, Between the plurality of bottom wall assembly portions, A box body characterized in that it is provided with a contact portion that is arranged inside the peripheral wall and contacts the inner surface of the peripheral wall, and a deflection prevention device that is fixed to the bottom wall by a screw that is screwed in from the front and prevents the peripheral wall from deflecting inward.

3. 3. The box according to claim 1, further comprising a packing sandwiched between the inner surface of the bottom wall and the rear end surface of the peripheral wall.

4. The bottom wall has an outer overlap portion that extends forward and covers the entire outer side of the rear end portion of the peripheral wall. an inner overlap portion that faces the outer overlap portion in the inward / outward direction of the peripheral wall and forms an insertion groove portion into which a rear end portion of the peripheral wall is inserted, 4. The box according to claim 3, further comprising a packing disposed in the insertion groove and held between a bottom surface of the insertion groove and a rear end surface of the peripheral wall.

5. 3. The box according to claim 1, wherein the peripheral wall has a rectangular frame shape, the bottom wall assembly portion is provided in a plurality of pieces on the peripheral wall, and at least one of the bottom wall assembly portions is formed in the middle of one of the sides constituting the peripheral wall.

6. 3. The box according to claim 1, further comprising a separate equipment mounting plate fixed to the bottom wall, the equipment mounting plate being attachable to the bottom wall by an attachment operation through a front opening in the peripheral wall.

7. A fixing structure for a box body, characterized in that the bottom wall of the box body described in claim 1 or 2 is fixed to a structure arranged behind the bottom wall, and the peripheral wall can be removed from the bottom wall by operating the peripheral wall from the front while the bottom wall is fixed.

Images