Wiring device unit

Abstract

To provide a wiring device unit capable of improving fire resistance while suppressing an increase in the number of components.SOLUTION: A wiring device unit includes a wiring block and a mounting frame 13. The mounting frame 13 includes a frame body 30 and a plurality of block engaging pieces 31. The frame body 30 surrounds the periphery of the wiring block and is fixed to a wall of a building structure. The block engaging piece 31 extends from an inner peripheral edge portion of the frame body 30 and engages the wiring block. The frame body 30 and the block engaging piece 31 are made of an integral plate member made of a fire-resistant metal. The frame body 30 is formed to a size that covers the outer peripheral edge portion outside of a recess in a state where the wiring block is accommodated in the recess of the wall of the building structure.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a wiring device unit having a wiring block such as a power outlet. [Background technology]

[0002] 2. Description of the Related Art Devices such as power outlets and power switches are often attached to the walls of buildings in the form of wiring device units including mounting frames (see, for example, Patent Document 1).

[0003] In this case, the wiring device unit has an outer access portion, such as a blade insertion port and a switch operation portion, disposed on one side of a wiring block that houses the wiring device. A resin mounting frame is attached to the wiring block via a mounting bracket. In this state, the mounting frame surrounds the periphery of the wiring block. The outer access portion of the wiring block is exposed to the outside of the mounting frame.

[0004] This wiring equipment unit has a wiring block inserted into a recess in the wall of a building with the outer access portion exposed to the outside, and in this state, the frame fixing portion of the mounting frame is fixed to a fixed portion provided in the recess in the wall by bolting or the like. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-67655 A Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, there has been a demand for this type of wiring device unit to have a more fire-resistant structure for the part that covers the recess on the wall side. To meet this demand, a separate plate made of fire-resistant metal is sometimes attached to the mounting frame of the wiring device unit. In this case, the additional plate is formed to a size that covers the outer peripheral edge of the recess on the wall side, and is fixed to the front of the mounting frame by screws or the like.

[0007] However, a wiring equipment unit with this structure requires mounting brackets for engaging the wiring block and a fire-resistant metal plate to be attached to a plastic mounting frame, which increases the number of parts and makes the assembly process more complicated.

[0008] SUMMARY OF THE PRESENT DISCLOSURE In view of the above, an object of the present invention is to provide a wiring device unit that can improve fire resistance while suppressing an increase in the number of parts. [Means for solving the problem]

[0009] In order to solve the above problems, the wiring device unit according to the present invention employs the following configuration. In other words, the wiring equipment unit of the present invention comprises a wiring block that incorporates wiring equipment and has an outer access portion that allows access to the wiring equipment from the outside, and a mounting frame that surrounds the periphery of the wiring block so that the outer access portion is exposed to the outside and is fixed to the wall of a building in a state in which the wiring block is engaged, wherein the mounting frame comprises a frame main body that surrounds the periphery of the wiring block and is fixed to the wall, and a plurality of block engaging pieces extending from the inner peripheral edge of the frame main body to engage the wiring block, wherein the frame main body and the block engaging pieces are made of a single plate member made of a fire-resistant metal, and the frame main body is formed to a size that covers the outer peripheral edge of the recess in the wall when the wiring block is accommodated in the recess.

[0010] With the above configuration, the wiring block is placed inside the frame body of the mounting frame so that the outer access portion is exposed to the outside. In this state, the wiring block is engaged with the block engaging piece of the mounting frame. In the wiring equipment unit of the above configuration, the wiring block is accommodated in a recess in the wall of a building, and in this state, the mounting frame is fixed to the wall of the building. At this time, the frame body of the mounting frame, which is made of a fire-resistant metal plate member, almost completely covers the front of the recess in the building together with the wiring block. As a result, the fire resistance of the portion covering the recess on the wall side is improved. Furthermore, in the wiring equipment unit of this configuration, the frame body and the block locking piece are made of a single plate member made of fire-resistant metal, and the frame body is designed to almost completely cover the recess of the building together with the wiring block, so that it is possible to obtain each function, such as locking the wiring block, fixing it to the wall of the building, and adding a fire-resistant functional part, with a single part.

[0011] The frame body has a substantially rectangular block accommodating opening inside which the wiring block is arranged, and the multiple block locking pieces consist of multiple cut-up pieces cut and raised from the edges of the block accommodating opening of the frame body, and each cut-up piece cut and raised from a pair of opposing sides of the block accommodating opening that face each other may be formed so that at least the tip regions are offset from each other in the direction along the opposing sides.

[0012] In this case, at least the tip regions of the cut-and-raised pieces cut and raised from a pair of opposing sides are formed so as to be offset from each other in the direction along the opposing sides, so that the extension lengths of these cut-and-raised pieces (block locking pieces) can be set sufficiently long. With this configuration, even if the lengths of these cut-and-raised pieces (block locking pieces) are set sufficiently long, the cut-and-raised pieces (block locking pieces) can be easily cut and raised from positions on a single plate material where they do not overlap. Therefore, when this configuration is adopted, it is possible to maintain a good yield rate in manufacturing the mounting frame, while ensuring that the wiring block is engaged by the block engaging piece having a sufficient extension length.

[0013] The remaining pair of opposing sides of the block storage opening may each be provided with another cut-and-raised piece having a protruding length shorter than the distance from the opposing side to the cut-and-raised piece arranged on the pair of opposing sides.

[0014] In this case, a cut-out piece (block locking piece) of sufficient width can be provided on each of the remaining pair of opposing sides of the block receiving opening, which makes it possible to reliably restrict misalignment in a direction that intersects with the removal direction of the wiring block, for example. Effect of the Invention

[0015] In the wiring equipment unit according to the present invention, the frame body and the block locking piece are made of an integrated plate member made of fire-resistant metal, and the frame body is sized to cover the outer peripheral edge of the recess when the wiring block is accommodated in the recess in the wall. Therefore, when the wiring equipment unit according to the present invention is used, it is possible to improve fire resistance while suppressing an increase in the number of parts. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a front view of the wiring device unit according to the embodiment. [Diagram 2] FIG. 4 is a rear view of the wiring device unit according to the embodiment. [Diagram 3] FIG. 2 is a side view of the wiring device unit according to the embodiment. [Figure 4] FIG. 2 is a plan view of the wiring device unit according to the embodiment. [Diagram 5] FIG. [Figure 6] FIG. 4 is a plan view showing a state before the cut-and-raised pieces of the mounting frame of the embodiment are cut and raised. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a power outlet 1 which is one form of a wiring device unit. The power outlet 1 is installed in a recess 90 provided in the wall of a building. The power outlet 1 has two pairs of receiving blades 10, one above the other, which receive a pair of blades of an attachment plug (not shown). The attachment plug is a plug for obtaining AC power to be supplied to an electric device from the receiving blades, and a pair of blades protrude from an end face of a plug body made of insulating resin. The receiving blades 10 are made of a substantially U-shaped conductive metal plate capable of receiving the blades of the attachment plug, and the inserted blades are clamped by the spring elasticity of the metal. The pair of receiving blades 10 are electrically connected to a power supply circuit (not shown). When the blades of the attachment plug are connected (received) to the pair of receiving blades 10, AC current from the power supply circuit (not shown) can be supplied to the electric device. In the following description, for ease of explanation, the side of the power outlet 1 facing the interior of the room will be referred to as the "front."

[0018] The two pairs of receiving blades 10 are installed inside a box-shaped outlet block 11. The outlet block 11 includes a block body 11A (see Figs. 2 to 4) that houses the two pairs of receiving blades 10 and a circuit board (not shown) inside, and a front wall 11B that closes the front side of the block body 11A. The block body 11A and the front wall 11B are fixed to each other by bolt fastening or the like. A plurality of electric circuits are mounted on the circuit board, and terminals for supplying power to the board are connected to the circuit board. The main parts of the block body 11A and the front wall 11B are formed of an electrically insulating resin. The front side of the front wall 11B is disposed so that it faces directly toward the inside of the room. The front wall 11B is formed in a rectangular shape that is long in the vertical direction when viewed from the front. The outlet block 11 is formed in a shape that is one size smaller than the recess 90 when viewed from the front, since it is inserted into a recess 90 in the wall of a building. In this embodiment, the outlet block 11 constitutes a wiring block, and the receiving blades 10, the circuit board, etc. constitute wiring devices. The front wall 11B, in which the blade insertion openings 15A, 15B described later are formed, constitutes an outer access portion of the wiring block.

[0019] The outlet block 11 is attached (locked) to a mounting frame 13 that incorporates the periphery thereof. The outlet block 11 is fixed to the wall of the building via the mounting frame 13. A fastening nut (not shown) is installed in a recess 90 in the wall of the building. The mounting frame 13 is fastened to the fastening nut in the recess 90 by a long bolt (not shown). In addition, a rectangular frame-shaped decorative panel 14 is detachably attached to the front surface of the mounting frame 13. The decorative panel 14 is disposed so as to surround the periphery of the front wall 11B, and its front surface is flush with the front surface of the peripheral edge of the front wall 11B.

[0020] The front wall 11B of the outlet block 11 has two pairs of blade insertion openings 15A, 15B, into which the blades of the plug are inserted from the front side, spaced apart from each other vertically. The upper and lower blade insertion openings 15A, 15B are elongated holes extending in a straight line in the vertical direction. The upper and lower pairs of blade insertion openings 15A, 15B are spaced apart from each other in the horizontal direction when viewed from the front, and are arranged opposite each other so as to be parallel to each other. The front surfaces of the peripheral areas of the blade insertion openings 15A, 15B of the upper and lower stages are abutment surfaces 16 against which an end face of a plug body of an attachment plug (not shown) abuts. The front wall 11B has receiving blades 10 for receiving the blades of the attachment plug at positions facing the blade insertion openings 15A, 15B on the rear side of the front wall 11B. In this embodiment, the front wall 11B is formed with a substantially semicircular earth terminal insertion opening 17 below the middle of each of the upper and lower blade insertion openings 15A, 15B so that a plug with an earth terminal can also be connected.

[0021] Furthermore, a discharge detection terminal 19 is provided between each pair of blade insertion openings 15A, 15B on the front wall 11B of the outlet block 11. The discharge detection terminal 19 is a terminal for detecting a weak spark discharge that occurs between the blades when the blades of the attachment plug are inserted into the receiving blades 10. The discharge detection terminal 19 is connected to a discharge detection circuit (not shown) on the circuit board. The discharge detection circuit is connected to a circuit for activating an alarm buzzer or alarm lamp when a discharge between the blades is detected, a circuit for cutting off the power circuit, etc. In addition, reference numeral 22 in FIG. 1 denotes an alarm lamp that lights up when a discharge between the plug blades is detected, and reference numeral 23 denotes a stop button for stopping the operation of the alarm lamp 22 or the alarm buzzer when they are activated.

[0022] Fig. 2 is a rear view of the power outlet 1. Fig. 3 is a side view of the power outlet 1, and Fig. 4 is a plan view of the power outlet 1. Figs. 2 to 4 show a state in which the decorative panel 14 has been removed from the mounting frame 13. Fig. 5 is a perspective view of the mounting frame 13. The entire mounting frame 13 is integrally formed from a fire-resistant metal plate member. The mounting frame 13 is formed into a predetermined shape by punching, cutting, bending, etc., from a rectangular fire-resistant metal plate material. The mounting frame 13 includes a rectangular frame body 30 that surrounds the approximately rectangular periphery (the outer peripheral surface when viewed from the front) of the outlet block 11 and is fixed to the wall of the building, and a plurality of block locking pieces 31 that extend from the inner peripheral edge of the frame body 30 and lock the outlet block 11.

[0023] As shown in Figs. 2 and 5, the frame body 30 has a block receiving opening 32 of a substantially rectangular shape that substantially matches the outer peripheral shape of the outlet block 11. The frame body 30 is formed in a rectangular ring shape that is vertically long when viewed from the front so as to surround the block receiving opening 32. An arc-shaped long hole 33 that is a frame body attachment part is formed in the center of each width direction of the upper side part 30u located above the block receiving opening 32 of the frame body 30 and the lower side part 30l located below the block receiving opening 32. A shaft part of a bolt that is fastened to a fastening nut provided in a recess 90 on the building side is inserted into each long hole 33. The frame body 30 is fixed to the wall on the building side by inserting the shaft part of the bolt into the long hole 33 from the front side and fastening the bolt to the fastening nut. In addition, a screw receiving part 34 for screwing the decorative panel 14 is formed directly above the long hole 33 of the upper side part 30u of the frame body 30 and directly below the long hole of the lower side part 30l.

[0024] As shown in FIG. 1, the frame body 30 has an outer edge shape of a substantially rectangular shape that is one size larger than the recess 90 on the building side. The frame body 30 is formed to a size that covers the outer periphery of the recess 90 when the outlet block 11 engaged with the block engaging piece 31 is accommodated in the recess 90 on the building side. Therefore, when the upper side 30u and the lower side 30l of the frame body 30 are fastened and fixed to the wall of the building by the above-mentioned bolts, the frame body 30 blocks the front side of the recess 90 together with the outlet block 11. Since the frame body 30 and the block engaging piece 31 are formed of a plate material made of a fire-resistant metal, the fire resistance of the portion covering the front of the recess 90 can be improved.

[0025] Here, block locking pieces 31 of approximately the same shape are respectively provided extending from the upper side 32u and the lower side 32l of the approximately rectangular block storage opening 32 of the frame body 30. When distinguishing these block locking pieces 31 from the other block locking pieces 31, they will be referred to as the "upper block locking piece 31u" and the "lower block locking piece 31l", respectively. Furthermore, block locking pieces 31 of approximately the same shape are respectively provided extending from the left and right side edges 32s1, 32s2 of the approximately rectangular block storage opening 32 of the frame body 30. When distinguishing these block locking pieces 31 from the other block locking pieces 31, they will be referred to as the "side block locking piece 31s1" and the "side block locking piece 31s2", respectively. In this embodiment, the upper edge 32u and the lower edge 32l form a pair of opposing sides of the block accommodating opening 32, and the left and right side block locking pieces 31s1 and 31s2 form the remaining pair of opposing sides of the block accommodating opening 32.

[0026] FIG. 6 is a plan view showing a fire-resistant metal plate member 13A before the block locking pieces 31 (cut-and-raised pieces) of the mounting frame 13 are cut and raised. For the sake of convenience, in the following description, the direction facing the interior of the room when the power outlet 1 is attached to the wall of a building will be referred to as the "front" of the mounting frame 13 and the outlet block 11, and the opposite side will be referred to as the "rear." Additionally, the direction perpendicular to the front-rear direction and the up-down direction will be referred to as the "width direction." The upper block locking piece 31u and the lower block locking piece 31l are cut and raised toward the rear side starting from the upper side 32u and the lower side 32l of the block accommodating opening 32 of the frame body 30. In other words, the upper block locking piece 31u and the lower block locking piece 31l are formed by cut and raised pieces that are cut and raised from the edge portion of the block accommodating opening 32 of the frame body 30.

[0027] The upper block locking piece 31u has a side wall portion 35 bent rearward at a substantially right angle from the upper side 32u of the block accommodating opening 32, and a claw portion 36 bent downward from the extending end of the side wall portion 35 at a substantially right angle. The sidewall 35 has a constant width at its base side adjacent to the block storage opening 32, and the width of its tip side connected to the claw 36 gradually decreases toward the extended end. One side in the width direction of the sidewall 35 extends linearly in the front-to-rear direction. In contrast, the other side in the width direction of the sidewall 35 extends linearly in the front-to-rear direction at its base side, and the tip side is inclined so as to gradually approach the one side toward the extended end. Therefore, the claw 36 connected to the extended end of the sidewall 35 is disposed at a position offset to one side with respect to the center of the width direction of the base side of the sidewall 35.

[0028] The lower block locking piece 31l has a side wall portion 35 bent rearward at a substantially right angle from the lower side 32l of the block accommodating opening 32, and a claw portion 36 bent upward at a substantially right angle from the extended end of the side wall portion 35. The side wall portion 35 and the claw portion 36 of the lower block locking piece 31l have the same shapes as the side wall portion 35 and the claw portion 36 of the above-mentioned upper block locking piece 31u. However, while the claw portion 36 of the upper block locking piece 31u is disposed at a position offset to one side with respect to the center in the width direction of the base side of the side wall portion 35, the claw portion 36 of the lower block locking piece 31l is disposed at a position offset to the other side with respect to the center in the width direction of the base side of the side wall portion 35.

[0029] As shown in Fig. 6, the upper block locking piece 31u is offset to one side in the width direction with respect to the center c of the block receiving opening 32, and the lower block locking piece 31l is offset to the other side in the width direction with respect to the center c of the block receiving opening 32. Therefore, with these configurations, the claw portion 36 of the upper block locking piece 31u and the claw portion 36 of the lower block locking piece 31l are largely offset from each other in the width direction (in the direction along a pair of opposing sides). As shown in Fig. 6, each claw portion 36 is formed with a bolt insertion hole 39 into which a shaft portion of a bolt 40 (see Figs. 2 to 4) for fixing the outlet block 11 to the upper block locking piece 31u and the lower block locking piece 31l is inserted. The claws 36 of the upper block locking piece 31u and the lower block locking piece 31l are locked to locking recesses 38 (see FIG. 2) formed in the corners of the rear end of the outlet block 11.

[0030] The side block locking pieces 31s1 and 31s2 are cut and raised toward the rear side from the left and right side edges 32s1, 32s2 of the block accommodating opening 32 of the frame body 30. In other words, the side block locking pieces 31s1 and 31s2 are formed by cut and raised pieces that are cut and raised from the edge of the block accommodating opening 32 of the frame body 30.

[0031] As shown in Fig. 6, each of the left and right side block locking pieces 31s1, 31s2 is formed of a substantially rectangular piece with a sufficiently wide width in the vertical direction. The vertical width of each side block locking piece 31s1, 31s2 is set so that the upper end and lower end are sufficiently close to the upper side 32u and lower side 32l of the block storage opening 32. Specifically, the vertical width of each side block locking piece 31s1, 31s2 is set so that it overlaps in the vertical direction with the base region of the upper block locking piece 31u and the base region of the lower block locking piece 31l in the pre-cut and raised state shown in Fig. 6.

[0032] 6, the protruding length L1 of one side block locking piece 31s1 (cut-and-raised piece) from the side edge 32s1 is shorter than the distance d1 from the side edge 32s1 to the lower block locking piece 31l (the block locking piece on the side close to the side edge 32s1). The protruding length L2 of the other side block locking piece 31s2 (cut-and-raised piece) from the side edge 32s2 is shorter than the distance d2 from the side edge 32s2 to the upper block locking piece 31u (the block locking piece on the side close to the side edge 32s2). Therefore, the side block locking pieces 31s1 and 31s2 can be cut and raised from a single plate member 13A without overlapping with the upper block locking piece 31u or the lower block locking piece 31l, while having a shape with a sufficient vertical width.

[0033] The left and right side block locking pieces 31s1, 31s2 of the mounting frame 13 come into contact with or are close to the left and right side surfaces of the outlet block 11 when the outlet block 11 is attached (locked) to the mounting frame 13. As a result, the left and right side block locking pieces 31s1, 31s2 regulate the left-right positional deviation of the outlet block 11.

[0034] The power outlet 1 having the above configuration is installed, for example, on the wall of a building in the following manner. The outlet block 11 is attached to the mounting frame 13 in advance. At this time, the outlet block 11 is inserted into the block housing opening 32 of the frame body 30 so that the front side, which is the outer access part, is exposed to the outside, and the corners on the rear side are hooked by the claw parts 36 of the upper block locking piece 31u and the lower block locking piece 31l. In this state, the outlet block 11 is fastened and fixed to the claw parts 36 by the bolts 40.

[0035] In this state, the outlet block 11 is connected to the wiring in the recess 90 in the wall of the building, the outlet block 11 connected to the wiring is inserted into the recess 90, and the frame body 30 of the mounting frame 13 is abutted against the front surface of the peripheral edge of the recess 90. After this, the top and bottom of the frame body 30 of the mounting frame 13 are tightened by bolts into the fastening nuts in the recess 90. Finally, the decorative panel 14 is attached to the frame body 30 of the mounting frame 13 thus attached to the wall of the building.

[0036] As described above, in the power outlet 1 of this embodiment, the frame body 30 and the block locking pieces 31 of the mounting frame 13 are made of an integral plate member made of fire-resistant metal. The frame body 30 is formed to a size that covers the outer peripheral edge of the recess 90 of the wall when the outlet block 11 (wiring block) is accommodated in the recess 90. Therefore, when the mounting frame 13 is fixed to the wall of a building with the outlet block 11 locked by the block locking pieces 31 of the mounting frame 13, the frame body 30 of the mounting frame 13 made of a plate member made of fire-resistant metal will almost completely cover the front of the recess 90 of the building together with the outlet block 11. Therefore, when the power outlet 1 of this embodiment is adopted, it is possible to improve fire resistance while suppressing an increase in the number of parts.

[0037] In the power outlet 1 of this embodiment, the multiple block locking pieces 31 of the mounting frame 13 are composed of multiple cut-and-raised pieces cut and raised from the edge of the block receiving opening 32 of the frame body 30. The cut-and-raised pieces (upper block locking piece 31u and lower block locking piece 31l) cut and raised from the upper and lower sides of the block receiving opening 32 are formed so that at least the tip regions (claw portions 36) are offset from each other in the direction along the upper and lower sides. This makes it possible to set the extension length of each cut-and-raised piece (upper block locking piece 31u and lower block locking piece 31l) cut and raised from the upper and lower sides of the block receiving opening 32 to be sufficiently long. In this configuration, even if the extension length of each cut-up piece (upper block locking piece 31u and lower block locking piece 31l) cut and raised from the upper and lower edges is set to be sufficiently long, the cut-up pieces (upper block locking piece 31u and lower block locking piece 31l) can be easily cut and raised from a position on a single plate material where they do not overlap. Therefore, when the power outlet 1 of this embodiment is adopted, it is possible to maintain a good yield rate during the manufacture of the mounting frame 13 while reliably engaging the outlet block 11 with the block engaging piece 31 having a sufficient extension length.

[0038] In the case of the power outlet 1 of this embodiment, a side block locking piece 31s1 having a protruding length L1 shorter than the distance d1 from the side 32s1 to the lower block locking piece 31l and a side block locking piece 31s2 having a protruding length L2 shorter than the distance d2 from the side 32s2 to the upper block locking piece 31u are provided on the left and right side edges 32s1, 32s2 of the block accommodating opening 32 of the mounting frame 13. This allows the side block locking pieces 31s1, 31s2 to be provided with a sufficient vertical width on the side edges 32s1, 32s2 of the block accommodating opening 32. Therefore, when the power outlet 1 having the above configuration is used, it becomes possible to reliably regulate the positional deviation of the outlet block 11 in the width direction by the side block locking pieces 31s1, 31s2.

[0039] The present invention is not limited to the above-described embodiment, and various design modifications are possible without departing from the spirit and scope of the present invention. For example, in the above embodiment, one block locking piece 31 extends from each of the four sides of the block receiving opening 32, but the number and shape of the block locking pieces 31 are not limited to the above example. The block locking pieces 31 may be provided only on a pair of mutually opposing sides.

[0040] In addition, the wiring device unit in the above embodiment is the power outlet 1 having the blade insertion openings 15A, 15B on the front side, but the wiring device unit is not limited to the power outlet. The wiring device unit may be of another form as long as it includes a wiring block having an external access portion that allows access to the wiring device from the outside. The wiring device unit may be, for example, a power switch that can be switched from the outside or other switches. [Explanation of symbols]

[0041] 1...Power outlet (wiring device unit) 10...Blade (wiring equipment) 11...Outlet block (wiring block) 11B…Front wall (outer access) 13...Mounting frame 30…Frame body 31...Block locking piece 32...Block storage opening 32u…Top side (opposite side) 32l…Bottom side (opposite side) 32s1, 32s2...Side (opposite sides) 90…Concave

Claims

1. a wiring block having a wiring device built therein and an outside access portion through which the wiring device can be accessed from the outside; a mounting frame that surrounds the periphery of the wiring block so that the outer access portion is exposed to the outside and is fixed to a wall of a building in a state in which the wiring block is engaged, The mounting frame includes: a frame body surrounding the periphery of the wiring block and fixed to the wall; a plurality of block locking pieces extending from an inner peripheral edge of the frame body and locking the wiring block, The frame body and the block locking piece are made of an integral plate member made of a fire-resistant metal, The wiring device unit is characterized in that the frame body is formed in a size that covers an outer peripheral edge of the recess in a state in which the wiring block is accommodated in the recess in the wall.

2. the frame body includes a substantially rectangular block accommodating opening into which the wiring block is disposed, the plurality of block locking pieces are made of a plurality of cut-and-raised pieces cut and raised from an edge portion of the block receiving opening of the frame body, 2. The wiring equipment unit according to claim 1, wherein each cut-and-raised piece cut and raised from a pair of opposing sides of the block accommodating opening is formed so that at least a tip region of each cut-and-raised piece is offset from each other in a direction along the opposing sides.

3. 3. The wiring equipment unit according to claim 2, wherein a second cut-and-raised piece is disposed on each of the remaining opposite sides of the block accommodating opening, the second cut-and-raised piece having a protruding length shorter than a distance from the remaining opposite sides to the cut-and-raised piece disposed on the pair of opposite sides.

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