JP6062831B2 - Wiring box - Google Patents

Description

  The present invention relates to a wiring box that is directly or indirectly attached to a construction material installed on the back of a wall.

  In order to install equipment on the wall of the building, a wiring box is attached to the construction material standing on the back of the wall. Moreover, the wall material is formed with a wall hole for installing an instrument. And, for example, when a fire or the like occurs on the front side of the wall, a fireproof wiring box is used in order to prevent the flame from flowing into the back side of the wall via the wall hole (for example, Patent Document 1). reference).

  As shown in FIG. 11, the fireproof wiring box 80 disclosed in Patent Document 1 includes a synthetic resin wiring box 82 formed in a bottomed box shape and covers the entire outer surface of the peripheral wall 81 of the wiring box 82. Thus, a sheet material 90 made of aluminum foil is provided.

  The wiring box 82 includes two cable insertion holes (connection holes) 83 on the upper side wall 82a and the lower side wall 82b, which are part of the peripheral wall 81. In addition, the wiring box 82 includes openings (connection openings) 85 on the left wall 82c and the right wall 82d, which are part of the peripheral wall 81, so as to communicate with the cable insertion holes 83.

  When the fireproof wiring box 80 is not used, the cable insertion hole 83 and the opening 85 are covered with the sheet material 90. On the other hand, when the fireproof wiring box 80 is used, a cable (not shown) is drawn into the wiring box 82 from the cable insertion hole 83.

  In order to draw the cable, the sheet material 90 is turned up to open the cable insertion hole 83 and the opening 85, and the cable tube 91 is pushed into the cable insertion hole 83 while the cable tube 91 is inserted into the opening 85. 91 is connected. Thereafter, the sheet material 90 is returned to its original position, and the outer peripheral surface of the conduit 91 is covered with a part of the sheet material 90, and the opening 85 and the conduit 91 and the cable insertion hole 83 are covered by a part of the sheet material 90. Close over the gap. Thereafter, the cable is inserted into the conduit 91 and the cable is drawn into the wiring box 82.

  As a result, the sheet material 90 covers the opening 85 and the gap in addition to the entire outer surface of the wiring box 82, so that the fire-resistant wiring box 80 can have fire resistance, and flames and smoke can be given from the opening 85 and the gap. Can be prevented from leaking.

JP 2012-244816 A

  By the way, in a state where the conduit 91 is connected to the fireproof wiring box 80 of Patent Document 1 and the opening 85 is covered with the sheet material 90, the conduit 91 is drawn when the cable is drawn into the wiring box 82 or after being drawn. External force may act on the. If the conduit 91 is moved by this external force, the sheet material 90 covering the opening 85 may be torn or turned up, and the opening 85 may be opened. In addition, an external force may act directly on the sheet material 90 covering the opening 85, and in this case as well, the sheet material 90 covering the opening 85 is torn or turned up to open the opening 85. There is a risk that.

  It is an object of the present invention to provide a wiring box capable of preventing the connection opening from being opened after the piping material is connected.

  A wiring box for solving the above problems is a wiring box that is directly or indirectly attached to a construction material installed on the back of a wall, is made of metal, and is formed in a bottomed box shape having a peripheral wall. , A connection hole capable of connecting a piping material to the peripheral wall, a connection opening communicating with the connection hole in order to arrange the piping material in the connection hole, and integral with the peripheral wall, and provided at the base end A gist is provided with a lid that can open and close the connection opening by plastically deforming the hinge.

  According to this, the piping material is pushed into the connection hole as it is while inserting the piping material into the connection opening while the lid is displaced and the connection opening is opened, so that the piping material is inserted into the connection hole. Can connect. Thereafter, the hinge is plastically deformed, and the connection opening is closed by the lid. Since the lid portion is integral with the peripheral wall and is made of metal, even if an external force acts on the lid portion from the piping material or an external force acts directly on the lid portion, the lid portion is prevented from being displaced. . For this reason, the state which closed the connection opening part with the cover part can be maintained, and it can prevent that the connection opening part is open | released.

In the wiring box, the connection opening may be formed in communication with the connection hole from another wall portion adjacent to the wall portion in the peripheral wall where the connection hole is formed.
According to this, a piping material can be inserted in the opening part for a connection by sliding a piping material toward the opening part for a connection from the side of another wall part. Since the connection opening communicates with the connection hole, the piping material can be connected to the connection hole by sliding the piping material as it is.

In the wiring box, the connection hole is closed by a closing member.
According to this, since the connection opening can be closed by the lid and the connection hole can be closed by the closing member, it is possible to suppress leakage of flame and smoke from the connection hole and the connection opening.

  According to the present invention, it is possible to prevent the connection opening from being opened after the piping material is connected.

The perspective view which shows the wiring box of embodiment from the opening side. The perspective view which shows the wiring box of embodiment from the bottom wall side. FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. The top view which shows the wiring box of embodiment. The perspective view which shows the state which removed the closure member and displaced the cover part to the open position. The top view which shows the state which slides a conduit. The top view which shows the state which connected the conduit tube to the connection hole. The top view which shows the state which displaced the cover part to the closed position. The perspective view which shows the wiring box which connected the conduit tube from the bottom wall side. The perspective view which shows the wiring box of another example. The perspective view which shows background art.

Hereinafter, an embodiment embodying a wiring box will be described with reference to FIGS.
As shown in FIG. 9, the conduit 10 as a piping material connected to the wiring box 11 is formed into a flexible pipe shape with a synthetic resin material, and forms a ring shape with the same diameter protruding in the circumferential direction. The ridge portion 10a and the ridge portion 10b having a ring shape with the same diameter are continuously formed repeatedly to form an uneven shape.

  As shown in FIG. 1 and FIG. 2, the wiring box 11 includes a bottom wall 12 having a rectangular plate shape and a pair of first walls as wall portions erected from a pair of side edges facing the top and bottom of the bottom wall 12. It is formed in the shape of a bottomed square box that opens to one side from one side wall 12a and a pair of second side walls 12b as wall portions standing from a pair of side edges facing the left and right sides of the bottom wall 12. The wiring box 11 is made of metal. The wiring box 11 has a peripheral wall S including a bottom wall 12, a pair of first side walls 12a, and a pair of second side walls 12b. The wiring box 11 includes a square annular flange 18 that extends outward from the opening edge of the peripheral wall S. The flange 18 intersects perpendicularly with respect to the first and second side walls 12a, 12b.

  As shown in FIGS. 2 and 5, a pair of screw holes 13 are formed in the bottom wall 12 of the wiring box 11. The wiring box 11 is attached to the box support 15 by forcibly screwing the screw 14 inserted through the screw hole 13 into the box support 15. The box support 15 includes a rectangular attachment piece 16 attached to a C-shaped steel 40 as a construction material erected on the back of the wall, and a support piece 17 extending in a rectangular shape from one side edge of the attachment piece 16. Prepare. And while attaching the attachment piece 16 to the side surface of the C-shaped steel 40 and attaching the wiring box 11 to the support piece 17 using the screws 14, the wiring box 11 is indirectly attached to the C-shaped steel 40 via the box support tool 15. Can be attached to.

  As shown in FIGS. 1 and 4, each first side wall 12a is formed with a circular connection hole 20 penetrating each first side wall 12a. Each connection hole 20 is closed by a metal disk-like closing member 21 when not in use. The closing member 21 is a portion punched from each first side wall 12a when the connection hole 20 is punched and formed in each first side wall 12a by press molding. The connection hole 20 is closed by fitting the punched closing member 21 back into the connection hole 20. On the outer surface of the closing member 21, a gripping ridge 21a extending in a rectangular plate shape is formed.

  As shown in FIG.1 and FIG.2, the cover part 23 is provided in each of the four corner parts C formed of each 1st side wall 12a and each 2nd side wall 12b. Each lid 23 is formed in an L shape so as to straddle the adjacent first side wall 12a and second side wall 12b. Each lid portion 23 has a certain width in the depth direction of the wiring box 11.

  Each lid portion 23 is integrally formed with each second side wall 12b with the position of each second side wall 12b near each first side wall 12a as a base end, and the integrally formed portion extends in the depth direction of the wiring box 11. The hinge 24 extends. Each lid portion 23 includes a first closing portion 25 that extends from each connection hole 20 toward each corner portion C with a certain width. The tip of the first closing part 25 is recessed in an arc shape extending along a part of the peripheral edge of the closing member 21. Each lid portion 23 has a second closing portion 26 that is bent at a right angle with respect to the first closing portion 25 and extends from the first closing portion 25 toward the hinge 24 with a certain width.

  Each lid portion 23 is formed by stamping each corner portion C by press molding while leaving the hinge 24, and is separated from each first side wall 12 a and each second side wall 12 b except for the hinge 24. Each lid 23 can be displaced about the hinge 24 by plastically deforming the hinge 24.

  As shown in FIGS. 2 and 5, each of the four corners C of the peripheral wall S is provided with a connection opening 30 that can be opened and closed by a lid 23. Each connection opening 30 is formed to open upward or downward from each first side wall 12a and to open left or right from each second side wall 12b. Each connection opening 30 is formed to communicate with each connection hole 20 on each first side wall 12a. The opening width of the connection opening 30 along the depth direction of the wiring box 11 is the same as the maximum diameter of the connection hole 20, and is formed to be the same as or slightly larger than the outer diameter of the recess 10 b of the conduit 10. ing. The connection opening 30 communicates with the connection hole 20 from the second side wall 12b that is another wall portion adjacent to the first side wall 12a that is the wall portion in which the connection hole 20 is formed. Further, each connection opening 30 is formed in each second side wall 12b so as to be recessed from each corner C along the longitudinal direction of the second side wall 12b.

  In each lid portion 23, the first closing portion 25 closes the opening at the first side wall 12 a of the connection opening 30, and the second closing portion 26 is the second side wall 12 b of the connection opening 30. Close the opening at. Further, the lid 23 is connected with the outer surface of the first closing portion 25 and the outer surface of the first side wall 12a being flush with each other and the outer surface of the second closing portion 26 and the outer surface of the second side wall 12b being flush with each other. In the state in which the opening 30 for use is closed, the circular connection hole 20 is defined on the tip side of the first closing portion 25. In the lid portion 23, a position where the connection hole 20 is partitioned and the connection opening 30 is closed is defined as a closed position.

  On the other hand, in the lid portion 23, the first closing portion 25 is separated from the first side wall 12 a and the second closing portion 26 is separated from the second side wall 12 b, and the position where the connection opening 30 is opened is defined. Open position. In order to displace the lid portion 23 from the closed position to the open position, the lid portion 23 is tilted about the hinge 24. During this tilting, the hinge 24 is plastically deformed. Further, in order to displace the lid 23 from the open position to the closed position, the lid 23 is tilted about the hinge 24. Also during this tilting, the hinge 24 is plastically deformed.

  Protrusions 27 are provided on the outer surfaces of the first side walls 12 a at positions where the lids 23 are sandwiched in the depth direction of the wiring box 11. The protrusion 27 is provided on a concentric circle having a diameter larger than that of the closing member 21 at a position sandwiching the tip of each first closing portion 25.

  As shown in FIG. 3, the boss portion B projects toward the inside of the wiring box 11 at a position sandwiched between the connection holes 20 on the opening side of the wiring box 11 in each first side wall 12 a. In addition, an internal thread is threaded on the inner peripheral surface of each boss portion B. The boss B is formed by cutting and raising each first side wall 12a. On the outer surface of each first side wall 12a, a metal tape 29 is attached to a position sandwiched between the connection holes 20, and the metal tape 29 closes the hole 28 formed by cutting and raising the boss B. Yes.

Next, the connection method of the conduit 10 to the wiring box 11 will be described together with the operation.
First, as shown in FIG. 5, the attachment piece 16 of the box support 15 is attached to the side surface of the C-shaped steel 40, and the wiring box 11 is attached to the support piece 17 of the box support 15 with screws 14. Next, in the closing member 21 that closes the connection hole 20 connecting the conduit 10, the holding protrusion 21 a is held by the tool 32, and the tool 32 is operated to remove the closing member 21 from the connection hole 20. .

  Next, as shown in FIG. 6, the lid portion 23 that defines the connection hole 20 is operated, the lid portion 23 is tilted about the hinge 24, and the lid portion 23 is displaced from the closed position to the open position. Let Then, the connection opening 30 is opened to the side of the peripheral wall S. Then, the conduit 10 is slid along the radial direction from the side of the second side wall 12 b toward the connection opening 30, and the end of the conduit 10 is inserted into the connection opening 30.

  Then, in the first side wall 12a, the concave strip portion 10b of the conduit 10 is press-fitted inside the connection opening 30. In a state where the conduit tube 10 is elastically deformed, the conduit tube 10 is pushed toward the connection hole 20 until the outer peripheral surface of the recess 10b comes into contact with the inner peripheral surface of the connection hole 20.

  As shown by a two-dot chain line in FIG. 7, the conduit 10 is elastically deformed into an elliptical shape so as to pass through the inside of the pair of protrusions 27, and when passing through the protrusion 27, the conduit 10 is connected to the connection hole 20. The In addition, the convex strip part 10a located in the wiring box 11 rather than the concave strip part 10b which contacted the internal peripheral surface of the connection hole 20 can be latched to the internal peripheral surface of the 1st side wall 12a. Due to the locking of the ridges 10 a, the conduit 10 is restricted from coming out of the connection hole 20 along the axial direction of the conduit 10.

  The pair of protrusions 27 are on the connection opening 30 side of the connection hole 20 and can be locked to the outer peripheral surface of the conduit 10 connected to the connection hole 20. Further, the length of the gap between the pair of protrusions 27 is narrower than the outer diameter of the conduit 10. For this reason, the pair of protrusions 27 restricts the conduit 10 from moving from the connection hole 20 toward the connection opening 30.

  Next, as shown in FIG. 8, the lid portion 23 in the open position is tilted about the hinge 24 to displace the lid portion 23 to the closed position. Then, as shown in FIG. 9, the connection opening 30 is closed by the lid 23. Further, the tip of the first closing portion 25 of the lid portion 23 is in contact with the outer peripheral surface of the concave strip portion 10 b of the conduit tube 10, and the connection hole 20 is defined, and the connection opening 30 is more than the connection hole 20. The side is blocked. And since the cover part 23 is metal and the hinge 24 is metal, the cover part 23 does not displace to the open position which opens the opening part 30 for connection. Therefore, the lid portion 23 prevents the conduit 10 from coming out through the connection opening 30.

According to the above embodiment, the following effects can be obtained.
(1) The wiring box 11 includes a connection hole 20 of the conduit 10 and a connection opening 30 that communicates with the connection hole 20. In addition, the wiring box 11 includes a lid portion 23 that can open and close the connection opening 30, and the lid portion 23 is made of metal. Therefore, after connecting the conduit 10 to the connection hole 20 and closing the connection opening 30 with the lid portion 23, the hinge 24 is not displaced even if it receives an external force or the like directly or indirectly, and the lid portion Thus, the connection opening 30 can be maintained in the closed state. Therefore, the lid portion 23 can prevent the conduit tube 10 from coming out of the connection opening 30.

  (2) Since it is unclear to which connection hole 20 the conduit 10 is connected until the wiring box 11 is constructed, the connection hole 20 cannot be opened in advance. In the wiring box 11 of this embodiment, even if the connection opening 30 is opened in order to connect the conduit 10 to the connection hole 20, the lid 23 is displaced to the closed position after the conduit 10 is connected. Thus, the connection opening 30 can be closed.

  (3) Since the hinge 24 of the lid portion 23 is integral with the second side wall 12b, the hinge 24 can be provided with a required rigidity, and cannot be elastically deformed. The lid portion 23 is displaced by an external force or the like. You can avoid it. Further, the lid portion 23 is formed of the metal itself that forms the wiring box 11 and is not in a thin film shape such as an aluminum foil. For this reason, the cover part 23 is not torn or chipped.

  (4) The first closing portion 25 of the lid portion 23 has a tip recessed in an arc shape. And in the state which displaced the cover part 23 to the closed position, the connection hole 20 can be divided circularly with the front-end | tip of the 1st closing part 25. FIG. Therefore, when the lid portion 23 is displaced to the closed position, the periphery of the conduit 10 is closed by the first closing portion 25, and the distal end of the first closing portion 25 is outer peripheral surface at the concave strip portion 10 b of the conduit 10. Can be contacted. Therefore, the lid 23 can close the connection opening 30 and the conduit 10 without a gap.

  (5) A connection opening 30 communicating with the connection hole 20 is provided, and the connection opening 30 opens in another second side wall 12b adjacent to the first side wall 12a in which the connection hole 20 is formed. Therefore, the conduit 10 can be connected to the connection hole 20 while being slid in the radial direction and passing through the connection opening 30. Therefore, compared with the case where the conduit 10 is moved in the axial direction and forcibly fitted into the connection hole 20, the connecting operation of the conduit 10 can be performed easily.

  (6) A pair of protrusions 27 sandwiching the connection opening 30 are provided on the outer surface of each first side wall 12 a on the connection opening 30 side from the connection hole 20. Therefore, when the conduit 10 is connected to the connection hole 20, the pair of protrusions 27 are locked to the outer surface of the conduit 10 on the connection opening 30 side of the conduit 10, so that the conduit 10 is connected. It can suppress moving to the opening part 30 side. Since the projection 27 suppresses the movement of the conduit 10 toward the connection opening 30, the lid 23 is not restrained from moving when the lid 23 is moved from the open position to the closed position. Can be moved to the closed position. Therefore, providing the protrusion 27 facilitates the operation of closing the connection opening 30 with the lid 23.

(7) Since the unused connection hole 20 is closed by the closing member 21, the closing member 21 can prevent flame and smoke from leaking from the connection hole 20.
(8) In a state where the connection hole 20 is closed by the closing member 21, the tip of the first closing portion 25 in the lid portion 23 is in contact with the peripheral edge of the closing member 21. For this reason, it can restrict | limit that the cover part 23 is displaced to the direction which narrows the connection hole 20, and it can prevent that a clearance gap is produced between the periphery of the opening part 30 for a connection, and the cover part 23. FIG.

In addition, you may change the said embodiment as follows.
In the embodiment, the connection hole 20 is formed in the first side wall 12a, and the connection opening 30 is formed across the second side wall 12b adjacent to the first side wall 12a. However, the present invention is not limited to this. As shown in FIG. 10, the connection hole 20 may be formed in the bottom wall 12, and the connection opening 30 may be formed in the same bottom wall 12.

The lid portion 23 may be formed so that the hinge 24 is located on the bottom wall 12 and extends from the bottom wall 12 to each first side wall 12a or each second side wall 12b.
In the wiring box 11 in which the connection hole 20 is formed in the bottom wall 12, the hinge 24 is located on the first side wall 12a or the second side wall 12b and extends from the first side wall 12a or the second side wall 12b to the bottom wall 12. The lid portion 23 may be formed on the top. In this case, the connection opening 30 is formed in the first side wall 12a or the second side wall 12b.

○ The protrusion 27 may be omitted.
○ The gripping ridge 21a of the closing member 21 may be omitted.
The piping material may be a cylindrical piping material that does not have the ridges 10 a and the recessed ridges 10 b as in the conduit 10 and has no irregularities on the outer peripheral surface and the inner peripheral surface.

  In the embodiment, the entire wiring box 11 is made of metal. However, if the peripheral wall S and the lid portion 23 are made of metal, for example, the boss portion B and the screw holding portion for holding the screw 14 are made of synthetic resin. May be formed separately and integrated with the wiring box 11. Furthermore, a thermal expansion material may be joined to the front surface of the flange 18 and, in the event of a fire, the thermal expansion material may be expanded to close the gap between the back surface of the wall and the flange 18.

○ The construction material may be H-shaped steel, not C-shaped steel 40, or a pillar.
○ In the wiring box 11, with one second side wall 12 b in contact with the side surface of the construction material, the screw penetrating the second side wall 12 b is forcibly screwed into the construction material to make the wiring box 11 a construction material. You may attach directly.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The lid portion has an L shape extending over a wall portion in which the connection hole is formed and another wall portion adjacent to the wall portion.

  (B) The piping material is formed in a pipe shape having flexibility, and a convex strip portion having a ring shape with the same diameter protruding in the circumferential direction and a concave strip portion having a ring shape with the same diameter are repeated. It is formed continuously and is uneven.

  DESCRIPTION OF SYMBOLS S ... Perimeter wall, 10 ... Electric conduit as piping material, 11 ... Wiring box, 20 ... Connection hole, 21 ... Closure member, 23 ... Cover part, 24 ... Hinge, 30 ... Opening for connection, 40 ... As construction material C-shaped steel.

Claims (3)

A wiring box that is directly or indirectly attached to a construction material installed on the back of a wall,
It is made of metal and formed into a bottomed box shape with a peripheral wall,
On the peripheral wall,
A connection hole to which piping material can be connected;
An opening for connection communicating with the connection hole to arrange the piping material in the connection hole;
A lid that is integral with the peripheral wall and that can open and close the connection opening by plastically deforming a hinge provided at a base end;
A wiring box comprising:   2. The wiring box according to claim 1, wherein the connection opening portion is formed to communicate with the connection hole from another wall portion adjacent to the wall portion where the connection hole is formed in the peripheral wall.   The wiring box according to claim 1, wherein the connection hole is closed by a closing member.