JP2017022996A - Refractory member for conduit connector, and apparatus comprising refractory wiring box, connector, and refractory member for conduit connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refractory treatment tool for a connector for a conduit, which can easily add a refractory function to a connector.SOLUTION: A refractory processing tool 40 made of a steel material is attached to an outer periphery of a portion of a connector 30 adjacent to a refractory wiring box 1, to add a refractory function to the connector 30. The connector 30 with the refractory function is fixed on an upper side wall 22a of a refractory cover 20, to maintain a state where the peripheral wall of the refractory processing tool 40 covering the outer periphery of the connector 30 is continuous with the peripheral wall of the refractory wiring box 1 tightly. There is no space between the refractory processing tool 40 and the refractory wiring box 1 as long as the connector 30 is connected to the refractory wiring box 1. In other words, only by attaching the connector 30 covered with the refractory processing tool 40 to the refractory wiring box 1, a refractory function can be added to the connector 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connector fireproof member for a conduit that covers the outer periphery of a synthetic resin connector used for connecting a conduit to a peripheral wall of a fireproof wiring box.

  A wiring box is attached to the back of the wall to install equipment on the wall of the building. Furthermore, a through-hole for installing an instrument is formed in the wall material for constructing the wall. And, for example, when a fire or the like occurs on the front side of the wall, the wiring box is made of a metal material to have fire resistance in order to prevent the flame from flowing into the back of the wall via the through hole There is.

  A conduit is attached to the side wall of the wiring box via a connector made of synthetic resin. The connector is attached to the side wall of the wiring box by inserting the protruding portion into an opening formed in the side wall of the wiring box and screwing a nut into the protruding portion exposed inside the wiring box. And a conduit tube is attached to the side wall of a wiring box by inserting a conduit tube in a connector.

By the way, when a fire or the like occurs and the connector is burned out, there is a risk that a flame may flow into the back of the wall via the opening in the side wall of the wiring box.
Thus, for example, Japanese Patent Application Laid-Open No. H10-228561 is given as a connector having a fireproof function. In Patent Document 1, in the wiring box, the entire protruding portion of the connector and the nut are covered closely with a refractory material without any gap. More specifically, the refractory material covers the protruding portion and the nut in a state where the refractory material is spread so as to spread over the entire width of the side wall of the wiring box. As a result, even when a fire or the like occurs, even if the flame flows into the wiring box, the refractory material is foamed and expanded by the flame, so that the flame does not reach the back of the wall from the through hole.

JP 2007-14045 A

  However, in Patent Document 1, in order to provide a connector with a fireproof function, it is necessary to attach a fireproof material to the inside of the wiring box after the connector is attached to the wiring box. As a result, the operator must perform both the work of attaching the connector to the wiring box and the work of attaching the refractory material. Especially in the work of attaching refractory materials, the worker must pay close attention to whether the amount of refractory material capable of exhibiting the fireproof function is adhered, or whether the gap is filled with the refractory material. The work was complicated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a fireproofing tool for a connector for a conduit that can easily impart a fireproofing function to the connector. .

  In order to solve the above-mentioned problems, the invention described in claim 1 relates to a fireproof member for a conduit connector, wherein the outer periphery of the connector made of a synthetic resin used for connecting the conduit to the peripheral wall of the fireproof wiring box is provided. It is a fireproof member for a conduit connector that has nonflammability to cover, and has a covering portion that covers at least the outer periphery of a portion adjacent to the peripheral wall, and the conduit connector fireproof member is attached to the outer periphery of the connector, The connector is attached to the peripheral wall so that the cover portion is in contact with the peripheral wall at one end side, so that the cover portion covering the outer periphery of the adjacent portion is maintained in a state of being continuous with the peripheral wall without a gap. This is the gist.

  The gist of the invention according to claim 2 is that, in the fireproof member for a conduit connector according to claim 1, the covering portion is formed in a ring shape.

The invention according to claim 3 relates to a refractory member for a conduit connector, and for a conduit connector having nonflammability that covers the outer periphery of a synthetic resin connector used to connect the conduit to the peripheral wall of the refractory wiring box. A fireproof member having a covering portion that covers at least an outer periphery of a portion adjacent to the peripheral wall, and the cover portion covering the outer periphery of the adjacent portion when the connector is attached to the peripheral wall. The gist is that the covering portion is a sheet material made of metal and is attached to the connector so as to reach or exceed the end face of the adjacent portion.
The invention according to claim 4 relates to an apparatus, and includes a fireproof wiring box having a peripheral wall, a connector made of a synthetic resin attached to the peripheral wall and connecting a conduit to the peripheral wall, and an outer periphery of the connector. It consists of the fireproof member for conduit connectors as described in any one of Claim 1 to 3 which covers.

  According to the present invention, a fireproof function can be easily given to a connector.

The perspective view which shows a mode that the connector which performed the fireproof process was attached to the fireproof wiring box. (A) is a front view which shows a connector, (b) is a top view which shows a connector. (A) is a perspective view which shows a fireproof processing tool, (b) is sectional drawing which shows a fireproof processing tool. (A) is a front view which shows the connector with which the fireproof processing tool was mounted | worn, (b) is a top view which shows the connector with which the fireproof processing tool was mounted | worn. Sectional drawing which shows a mode that the connector which performed the fireproof process was attached to the fireproof wiring box. (A) is a top view which shows the fireproof processing tool in 2nd Embodiment, (b) is a side view which shows the fireproof processing tool in 2nd Embodiment. The top view which shows the connector with which the fireproof processing tool of 2nd Embodiment was mounted | worn. In 3rd Embodiment, the front view which shows the connector with which the sheet | seat material was stuck. The perspective view which shows another example of a fireproof processing tool. The top view which shows another example of a fireproof processing tool. The top view which shows another example of a fireproof processing tool.

(First embodiment)
A first embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the fireproof wiring box 1 is composed of a wiring box 10 installed behind the wall W and a fireproof cover 20 covering the wiring box 10.

First, the wall W where the fireproof wiring box 1 is installed will be described.
As shown in FIG. 5, the wall W is composed of a column H and a pair of wall members W <b> 1 erected on both front and rear surfaces of the column H. The wall material W1 is made of gypsum board.

Next, the wiring box 10 will be described.
As shown in FIG. 1, the wiring box 10 has an opening 13 on the front surface (one surface) from a rectangular plate-shaped bottom wall 11 and four side walls 12 a to 12 d erected from the periphery of the bottom wall 11. It is formed in a bottom square box shape. The peripheral wall of the wiring box 10 is formed by the bottom wall 11 and the side walls 12a to 12d. In the following description, the upper and lower side walls in FIG. 1 are referred to as an upper side wall 12a and a lower side wall 12b, and the left and right side walls in FIG. 1 are referred to as a right side wall 12c and a left side wall 12d. The wiring box 10 is made of synthetic resin.

  Two cable insertion holes 14 are formed in the upper side wall 12a and the lower side wall 12b. Boss portions 15 projecting inward are provided on the inner surfaces of the upper side wall 12a and the lower side wall 12b. Each boss portion 15 is used for attaching a wiring device (not shown) to the wiring box 10.

  A plurality (three in the embodiment) of insertion holes 16 through which the fixing screws B are inserted are formed in the left side wall 12d. Each insertion hole 16 is formed in a long hole shape that extends in the depth direction of the wiring box 10. The fixing screw B is used for fixing the wiring box 10 to the pillar H.

Next, the fireproof cover 20 will be described.
As shown in FIG. 1, the fireproof cover 20 includes a cover body 21 formed in a bottomed square box shape having an opening 21 a on the front surface (one surface). The cover body 21 is made of a metal material. The cover main body 21 is formed of a rectangular plate-like bottom wall 22 and four side walls 22 a to 22 d erected from the periphery of the bottom wall 22. And the surrounding wall of the cover main body 21 is formed of the bottom wall 22 and side wall 22a-22d. Furthermore, the cover main body 21 has an accommodation space 23 that is enclosed by the bottom wall 22 and the side walls 22a to 22d and can accommodate the wiring box 10. In the following description, the upper and lower side walls in FIG. 1 are referred to as an upper side wall 22a and a lower side wall 22b, and the left and right side walls in FIG. 1 are referred to as a right side wall 22c and a left side wall 22d.

  A square ring-shaped flange 24 is integrally formed around the entire periphery of the opening 21 a in the cover body 21. The flange 24 is formed so as to extend from the entire periphery of the opening 21 a toward the outside of the cover body 21.

  Further, the outer surface of the left side wall 22d is a contact portion that can contact the side surface of the column H when the fireproof cover 20 is installed on the column H. Furthermore, a plurality of through holes 25 (three in this embodiment) through which the fixing screws B are inserted are formed in the left side wall 22d. Each penetration hole 25 is formed in the shape of a long hole that is elongated in the depth direction of the cover main body 21.

  Two cable penetration holes 26 can be formed in the upper side wall 22a and the lower side wall 22b. The cable insertion hole 26 is opened for the first time when the cable C is inserted, and is closed by a knock portion 26a when the cable C is not inserted.

As shown in FIGS. 1 and 5, the conduit D can be attached to the fireproof wiring box 1 using a connector 30.
As shown in FIGS. 2A and 2B, the connector 30 is formed in a substantially cylindrical shape with a synthetic resin and connected to the conduit D, and from the connector body 31 in the axial direction. It is formed by an attachment portion 32 that is extended and attached to the fireproof wiring box 1.

  From the inner peripheral surface of the connector main body 31, a first locking claw that extends from the opening end of the connector main body 31 toward the attachment portion 32 and that can be locked around the conduit D made of synthetic resin. 31a protrudes. In addition, although the base end of this 1st latching claw 31a is extended from the connector main body 31, the front-end | tip is a free end. For this reason, the 1st latching claw 31a can be elastically deformed toward the outer side and inner side of the connector 30 centering on the base end. The boundary between the connector main body 31 and the attachment portion 32 is the base end 33 of the connector main body 31 on the side opposite to the opening end of the connector main body 31.

  On the other hand, a second locking claw 32a that can be locked around the cable insertion hole 14 from the inside of the upper side wall 12a protrudes from the tip of the attachment portion 32. In addition, the attachment part 32 in which the 2nd latching claw 32a is formed is extended in the base end part 33 of the connector main body 31 from the base end, However On the side in which the 2nd latching claw 32a is formed. Some tips are free ends. For this reason, the attachment part 32 can be elastically deformed toward the outer side and the inner side of the connector 30 around the base end thereof. The attachment portion 32 also functions as an insertion portion that is inserted through the cable insertion hole 14.

  2A and 5, the inner diameter N1 of the opening of the connector body 31 is the length between the inner diameter N2 of the cable insertion hole 26 and the outer peripheral surfaces of the opposing second locking claws 32a. It is formed larger than N3. Further, the outer diameter N4 of the base end portion 33 is larger than the inner diameter N2 of the cable insertion hole 26 and the length N3 between the outer peripheral surfaces of the opposing second locking claws 32a. On the other hand, the length N3 between the outer peripheral surfaces of the opposing second locking claws 32a is formed larger than the inner diameter N2 of the cable insertion hole 26, but the attachment portion 32 is elastically deformable. In a state after being elastically deformed, the cable insertion hole 26 can be passed.

  Accordingly, the second locking claw 32a (attachment portion 32) of the connector 30 can be inserted into the cable insertion hole 26, and the second locking claw 32a extends around the cable insertion hole 14 from the inside of the upper side wall 12a. Lock. On the other hand, the base end portion 33 contacts the outer surface of the upper side wall 22a without passing through the cable insertion hole 26.

  As shown in FIG. 5, the conduit D is formed in the shape of a flexible pipe made of a synthetic resin material, and has a protruding strip portion Da that has a ring shape with the same diameter protruding in the circumferential direction, and a ring with the same diameter. The concave streak portion Db having a shape is repeatedly and continuously formed to be uneven. When the conduit D is inserted into the connector main body 31, the first locking claw 31 a is locked to the recess Db, and the conduit D is connected to the connector 30.

  The connector 30 made of a synthetic resin material is subjected to a fireproofing process. The fireproofing process is performed by attaching a metal fireproofing tool 40 as a conduit tube connector fireproofing member to the connector 30. Thereby, the part covered with the fireproof processing tool 40 in the connector 30 has a fireproof function.

Hereinafter, the fireproof processing tool 40 will be described.
As shown to Fig.3 (a), (b), the fireproof processing tool 40 is formed in the ring shape. More specifically, the fireproof processing tool 40 has an opening 40a through which the attachment portion 32 is inserted, a bottom plate 41 that surrounds the opening 40a, and a covering that stands up from the outer end of the bottom plate 41 and surrounds the opening 40a. It is integrally formed with the peripheral wall 42 as a part. Moreover, the fireproof processing tool 40 is formed with the steel material which is a nonflammable material which conforms to the technical standard defined in Article 108-2 of the Building Standard Law Enforcement Ordinance.

  The length of the attachment portion 32 is such that when the fireproof processing tool 40 is attached to the connector 30 and the second locking claw 32a is locked to the inner surface of the upper side wall 22a of the fireproof cover 20, the fireproof processing tool 40 is used. The length is such that it can be attached to the fireproof cover 20 without rattling. When the connector 30 is directly attached to the wiring box 10 without using the fireproof cover 20, the length of the attachment portion 32 is set so that the second locking claw 32 a is locked to the inner surface of the upper side wall 12 a of the wiring box 10. Sometimes, the length may be such that the connector 30 can be attached to the wiring box 10 without rattling.

  2 and 3, the length N3 between the outer peripheral surfaces of the opposing second locking claws 32a and the outer diameter N4 of the base end portion 33 are larger than the inner diameter N5 of the opening 40a of the fireproof processing tool 40. Although large, the attachment portion 32 is elastically deformable, and can pass through the opening 40a in a state after being elastically deformed. Thereby, the fireproof processing tool 40 can be temporarily held in the connector 30. In addition, since the inner diameter N7 of the opening facing the bottom plate 41 of the fireproof processing tool 40 is slightly larger than the outer diameter N4 of the base end part 33, the base end part 33 fits inside the fireproof processing tool 40. It is possible.

  On the other hand, the length N6 between the outer peripheral surfaces of the first locking claws 31a facing each other is larger than the inner diameter N7 of the opening facing the bottom plate 41 of the fireproof processing tool 40. Further, the length N8 in the height direction of the fireproof processing tool 40 is shorter than the length N8a from the lower end surface of the first locking claw 31a to the upper end surface of the second locking claw 32a.

  Therefore, as shown in FIG. 4, when the attachment part 32 of the connector 30 is inserted into the fireproofing tool 40 and the fireproofing tool 40 is attached to the connector 30, the fireproofing tool 40 is connected to the first locking claws 31 a. It will be located between the 2nd latching claws 32a. Thereby, the part located between the 1st latching claw 31a and the 2nd latching claw 32a among the outer periphery of the connector 30 is covered with the fireproof processing tool 40.

Next, a method for accommodating the wiring box 10 in the fireproof cover 20 will be described.
As shown in FIG. 1, the wiring box 10 is inserted so as to be forced into the housing space 23. Then, the wiring box 10 is accommodated in the accommodation space 23. Further, in the state where the wiring box 10 is accommodated in the accommodation space 23, the through holes 25 and the through holes 16 face each other.

  The depth of the accommodation space 23 is set so that the opening 13 of the wiring box 10 is located on the same plane as the opening 21 a of the cover body 21 when the wiring box 10 is accommodated in the accommodation space 23. Therefore, the accommodation space 23 is formed in a size that allows the wiring box 10 to be accommodated in the accommodation space 23 from the opening 21 a and covers the entire outer surface of the wiring box 10 accommodated in the accommodation space 23. That is, the outer surface of all the peripheral walls (the bottom wall 11 and the side walls 12a to 12d) constituting the wiring box 10 is covered by the fireproof cover 20.

The wiring box 10 is accommodated in the fireproof cover 20 in this manner, whereby the fireproof wiring box 1 including the fireproof cover 20 and the wiring box 10 is configured.
Next, the installation method with respect to the wall W of the fireproof wiring box 1 is demonstrated.

First, the knock portion 26a is removed, and one cable penetration hole 26 is opened in the upper side wall 22a.
Subsequently, the fireproof wiring box 1 is arranged so that the outer surface of the left side wall 22d of the cover main body 21 is in contact with the side surface of the column H, and the left rear surface of the flange 24 is in contact with the front surface of the column H. Subsequently, the fixing screw B is inserted into the insertion hole 16 of the wiring box 10 and the insertion hole 25 of the cover body 21. When the fixing screw B is forcibly screwed into the pillar H, the fireproof wiring box 1 is directly fixed to the pillar H. In addition, the fireproof wiring box 1 may be attached to the pillar H through a box fixture (not shown) fixed to the pillar H, another support tool, or the like.

  Next, the attachment part 32 of the connector 30 is inserted into the opening 40 a of the fireproof processing tool 40, and the fireproof processing tool 40 is attached to the connector 30. When the attachment portion 32 of the connector 30 is inserted into the cable insertion hole 26 opened in the upper side wall 22a and the second locking claw 32a is locked to the inner surface of the upper side wall 12a, the fire resistance of the connector 30 is increased. Movement toward the outside of the conductive wiring box 1 is restricted.

  Moreover, the bottom plate 41 of the fireproof processing tool 40 is in contact with the outer surface of the upper wall 22a of the fireproof cover 20 by locking the second latching claws 32a to the inner surface of the upper wall 12a. As a result, the bottom plate 41 of the fireproof processing tool 40 is sandwiched between the connector main body 31 (particularly, the base end portion 33) and the upper side wall 22a of the fireproof cover 20. Further, the bottom plate 41 comes into surface contact with the upper side wall 22a of the fireproof cover 20. Therefore, when the connector 30 is attached to the fireproof cover 20 by inserting the connector 30 into the cable insertion hole 26 of the upper side wall 22a of the fireproof cover 20, the adjacent portion of the connector 30 adjacent to the fireproof wiring box 1 is removed. The outer periphery is covered with the peripheral wall 42 of the fireproof processing tool 40.

  Further, by attaching the connector 30 to which the fireproofing tool 40 is attached to the upper side wall 22a of the metal fireproof cover 20, the fireproofing tool 40 maintains a state in which the connector 30 is continuous with the upper side wall 22a without any gap. Will be. In addition, since the fireproof processing tool 40 is located between the first locking claw 31a and the second locking claw 32a, the fireproof processing tool 40 itself is connected to the fireproof cover 20 by the connection of the connector 30 to the fireproof wiring 20. The connection state with the box 1 is maintained.

Next, the conduit D is connected to the connection portion 30 a of the connector 30. Thereafter, the cable C is inserted into the conduit D, and the cable C is further pulled into the fireproof wiring box 1.
Subsequently, as shown in FIG. 5, a wall material W <b> 1 is erected on the front side of the column H. Then, the refractory wiring box 1 is installed on the back of the wall W with the left side of the flange 24 sandwiched between the rear surface of the wall material W1 and the front surface of the column H. Thus, the installation structure of the fireproof wiring box 1 is formed. At this time, the entire front surface of the flange 24 is in surface contact with the rear surface of the wall material W1. Then, in the wall material W1 located on the front side of the wall W, the wall material W1 is cut using a drilling tool (not shown) at a position facing the refractory wiring box 1 to form a through hole W2. Then, the opening 13 of the wiring box 10 is exposed to the surface of the wall W through the through hole W2.

Next, the operation of the fireproof wiring box 1 and the fireproof processing tool 40 will be described.
When a fire or the like occurs, the synthetic resin wiring box 10 does not have fire resistance, and thus is easily burned by a fire. However, since the metal fireproof cover 20 has fire resistance, it is difficult to burn, and even if the wiring box 10 is burned due to a fire, the fireproof cover 20 can cause flames, smoke, toxic gases, etc. on the back of the wall W. Inflow is prevented.

  A synthetic resin connector 30 is connected to the upper side wall 22 a of the fireproof cover 20. Since the connector 30 does not have fire resistance, it is easily burned by a fire. However, by attaching the fireproof processing tool 40 to the connector 30, when the connector 30 is attached to the upper side wall 22a of the fireproof cover 20, the bottom plate 41 of the fireproof processing tool 40 comes into contact with the outer surface of the upper side wall 22a. Thereby, the metal fireproof cover 20 and the metal fireproof processing tool 40 are connected without a gap. Therefore, the part covered with the fireproof processing tool 40 in the connector 30 has a fireproof function. And even if the connector 30 is burnt down by the fire and the flame goes up from the cable insertion hole 26, the fireproof treatment tool 40 is not burned out, so that the flame can be prevented from jumping out easily. That is, since the fireproof processing tool 40 is attached around the cable penetration hole 26, no flame can be seen in the immediate vicinity of the fireproof cover 20.

According to the above embodiment, the following effects can be obtained.
(1) A fireproof function is imparted to the connector 30 by attaching the fireproof treatment tool 40 to the outer periphery of the adjacent portion of the connector 30 adjacent to the fireproof wiring box 1. And the peripheral wall 42 of the fireproof processing tool 40 which covered the outer periphery of the connector 30 is attached by attaching the connector 30 to which the fireproof function was provided to the peripheral wall (upper side wall 22a of the fireproof cover 20) of the fireproof wiring box 1. The refractory wiring box 1 is maintained in a continuous state with no gap. According to this, as long as the connector 30 is connected to the fireproof wiring box 1, no gap is formed between the fireproof processing tool 40 and the fireproof wiring box 1. That is, the fire resistance function can be easily given to the connector 30 only by attaching the connector 30 covered with the fireproof processing tool 40 to the fireproof wiring box 1.

  (2) By sandwiching the bottom plate 41 of the fireproof processing tool 40 between the connector main body 31 and the peripheral wall of the fireproof wiring box 1 (the upper side wall 22a of the fireproof cover 20), the bottom plate 41 faces the upper side wall 22a of the fireproof cover 20 Since the contact is made, the connector 30 and the fireproof wiring box 1 can be more reliably closed without rattling the connector 30.

  (3) Suppose that the fireproof processing tool which opened in the U-shape and extended the nail | claw piece toward the height direction of the fireproof processing tool from the front-end | tip of two sides which open facing the surrounding wall side is used. In such a fireproof processing tool, the fireproof processing tool is attached to the connector 30 by inserting a claw piece between the wall material W1 and the pillar H. However, in such a mounted state, only the “claw piece” is reliably connected to the refractory wiring box 1, so that the fireproof processing tool is displaced or oscillated around the claw piece. It is possible. On the other hand, when the fireproof processing tool 40 is attached to the connector 30, the fireproof processing tool 40 is positioned between the first locking claw 31 a and the second locking claw 32 a. Connection to the fireproof wiring box 1 is maintained by connection to the fireproof cover 20. Therefore, it becomes possible to connect the fireproof processing tool 40 to the fireproof wiring box 1 more reliably than when using the U-shaped fireproof processing tool described above.

  (4) Even if the connector 30, which is an exposed portion of the fireproof wiring box 1, is burned down by a fire, the fireproof processing tool 40 remains on the outer surface of the fireproof cover 20. For this reason, even if the connector 30 is burned out due to a fire and a flame rises from the cable insertion hole 26, the fireproof treatment tool 40 is attached around the cable insertion hole 26. Can not be seen.

(5) By making the fireproof processing tool 40 into a ring shape, it is possible to cover the peripheral wall of the connector 30 in the entire circumferential direction. Thereby, the fireproof function of the connector 30 can be improved more.
(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. In the following description, the same reference numerals are given to the same configurations as those of the already described embodiments, and the overlapping description is omitted or simplified.

  As shown to Fig.6 (a), (b), the fireproof processing tool 50 is formed in U shape. More specifically, the fireproof processing tool 50 has an opening 50a through which the attachment portion 32 is inserted, and surrounds the bottom plate 51 except for a part of the opening 50a, and is erected from the outer end of the bottom plate 51. It is integrally formed with the peripheral wall 52 surrounding the opening 50a except for a part. Moreover, the opening 50a is also opened to the side of the peripheral wall 52, and the tip of the peripheral wall 52 located on the side of the opening 50a that opens to the side of the peripheral wall 52 becomes an opening end 50b. In addition, one connector 30 can be accommodated inside the fireproof processing tool 50. The fireproof processing tool 50 is formed of a steel material that is a non-combustible material that meets the technical standards defined in Article 108-2 of the Building Standards Law Enforcement Ordinance.

  As shown in FIGS. 2 and 6, the length N3 between the outer peripheral surfaces of the opposing second locking claws 32a is smaller than the opening width N9 of the opening 50a, while the outer diameter N4 of the base end portion 33 is , Larger than the opening width N9 of the opening 50a. Further, the length N10 of the fireproof processing tool 50 in the height direction is shorter than the length N8a from the lower end surface of the first locking claw 31a to the upper end surface of the second locking claw 32a. Further, as shown in FIGS. 6 and 7, the inner diameter N11 in the length direction of the fireproof processing tool 50 is substantially the same as the length N11 from the cable penetration hole 26 to the flange 24 in the fireproof cover 20. .

Hereinafter, an example of a method of attaching the fireproof processing tool 50 to the connector 30 will be described with reference to FIG.
As shown in FIG. 7, after attaching the fireproof wiring box 1 to the pillar H, the connector 30 is connected to the cable penetration hole 26 opened to the upper side wall 22a. Thereafter, the fireproof processing tool 50 is inserted into the connector 30 from the right side wall 22 c side of the fireproof cover 20, that is, from the side facing the pillar H, and the fireproof processing tool 50 is attached to the connector 30. Next, the fireproof processing tool 50 is rotated, and the opening end 50 b is brought into contact with the outer surface of the flange 24.

  Thereby, the location located between the 1st latching claw 31a and the 2nd latching claw 32a among the outer periphery of the connector 30 is covered with the fireproof processing tool 50. Further, by locking the second locking claw 32a to the inner surface of the upper side wall 12a, the bottom plate 51 of the fireproof processing tool 50 comes into contact with the outer surface of the upper side wall 22a of the fireproof cover 20, and the bottom plate 51 Is in surface contact with the upper side wall 22a of the fireproof cover 20. Furthermore, by bringing the open end 50 b into contact with the outer surface of the flange 24, the entire circumference of the connector 30 is covered with the fireproof processing tool 50 and the flange 24.

According to the said 2nd Embodiment, in addition to the description similar to (1)-(4) of 1st Embodiment, the following effects can be acquired.
(6) Since the opening 50 a is open to the side of the peripheral wall 52, the fireproof processing tool 50 can be attached to the connector 30 even after the connector 30 is attached to the fireproof wiring box 1. . Thereby, it becomes possible to attach the fireproof processing tool 50 to the connector 30 irrespective of the timing which attaches the connector 30 to the fireproof wiring box 1, and the versatility of work improves.

  (7) The inner diameter N11 in the length direction of the fireproof processing tool 50 is made substantially the same as the length N11 from the cable penetration hole 26 to the flange 24 in the fireproof cover 20. Accordingly, when the fireproof processing tool 50 is attached to the connector 30, the open end 50 b can be brought into contact with the outer surface of the flange 24, so that the entire periphery of the connector 30 is covered by the fireproof processing tool 50 and the flange 24. It will be. Therefore, the entire circumference of the connector 30 can be covered even with the fireproof processing tool 50 in which a part of the circumferential direction is cut out.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. In the following description, the same reference numerals are given to the same configurations as those of the already described embodiments, and the overlapping description is omitted or simplified.

As shown in FIG. 8, in this embodiment, the connector 30 is subjected to fireproofing treatment by sticking a sheet material 60 as a fireproofing tool to the outer periphery of the connector 30.
Hereinafter, the sheet material 60 will be described.

  As shown in FIG. 8, the sheet material 60 is formed by laminating a metal layer 60a and an adhesive layer 60b. The metal layer 60a is made of aluminum, which is a non-combustible material that meets the technical standards defined in Article 108-2 of the Building Standard Law Enforcement Ordinance. The adhesive layer 60b is formed by applying glue to the metal layer 60a.

  And the sheet | seat material 60 is affixed on the outer periphery of the connector 30 so that the perimeter from the lower end of the 1st latching claw 31a to the lower end of the base end part 33 may be covered. That is, the sheet material 60 is stuck to the surface where the connector 30 is exposed from the upper side wall 22a of the fireproof cover 20, and is not stuck to the place where it is inserted inside the fireproof cover 20. Thereby, the outer periphery of the adjacent portion of the connector 30 adjacent to the fireproof wiring box 1 is covered with the sheet material 60. At this time, the length of the attachment portion 32 in the present embodiment is such that the sheet material 60 is attached to the connector 30 and the second locking claw 32a is locked to the inner surface of the upper side wall 22a of the fireproof cover 20. The length is preferably such that the connector 30 can be attached to the fireproof cover 20 without rattling.

According to the said 3rd Embodiment, in addition to the description similar to (1) and (4) of 1st Embodiment, the following effects can be acquired.
(8) Regardless of the shape of the connector 30, a fireproof function can be imparted to the connector 30 only by sticking the sheet material 60.

In addition, you may change the said embodiment as follows.
In the third embodiment, not only the adjacent portion of the connector 30 adjacent to the fireproof wiring box 1 but also the outer periphery of the connector main body 31 may be covered with the sheet material 60 over the entire height direction. At this time, the sheet material 60 may be adhered to the connector 30 so that the operation of releasing the locking of the first locking claw 31a to the conduit D is not hindered. Specifically, a slit or a through-hole is formed in the sheet material 60, and a portion that is gripped and operated by a pliers or a finger when releasing the locking to the conduit D from the slit or the through-hole (connector body) The outer peripheral surface of the connector body 31 is covered with the sheet material 60 over the entire height direction while projecting the outer peripheral surface of the outer peripheral surface 31. By doing in this way, while covering the connector main body 31 with the sheet | seat material 60 over the whole height direction, engagement with the electric wire D of the 1st latching claw 31a is easily cancelled | released, and the electric wire D is attached. The connector body 31 can be removed. Further, without considering the operability when releasing the locking of the first locking claw 31a to the conduit D, the outer circumference of the connector main body 31 in the height direction is determined for each part that is gripped and operated by the pliers or fingers. You may cover with the sheet material 60 over the whole.

  In the third embodiment, the sheet material 60 may exceed the surface exposed from the upper side wall 22a of the fireproof cover 20. At this time, the sheet material 60 may be attached to a location where the connector 30 is inserted inside the fireproof cover 20, or the second locking claw 32 a is not attached to the sheet material 60, and the second engagement. The sheet material 60 may be arranged so as to float from the pawl 32a. In addition, when the sheet | seat material 60 is arrange | positioned so that it may float from the 2nd latching nail | claw 32a, when the connector 30 is inserted in the cable penetration hole 26, the sheet | seat materials 60 will contact and the sheet | seat material 60 is the outer surface of the upper side wall 22a. It can be in a dense state. In such a case, the adjacent portion of the connector 30 adjacent to the fireproof cover 20 is covered with the dense sheet material 60. Therefore, the fireproof function is provided by the dense sheet material 60.

  The fireproof processing tool 40 in the first embodiment or the fireproof processing tool 50 in the second embodiment may be used in combination with the sheet material 60. For example, the fireproof processing tool 40 or the fireproof processing tool 50 may be attached after the peripheral wall of the connector 30 is covered with the sheet material 60. Further, in the connector 30, the upper part of the first locking claw 31a is covered with the sheet material 60, while the space between the first locking claw 31a and the second locking claw 32a is covered with the fireproof processing tool 40 or the fireproof processing tool 50. You may do it.

  In the first embodiment, as shown in FIG. 9, the fireproof processing tool 40 is cut and divided into two along the entire height direction of the peripheral wall 42, and one end thereof is connected using a connecting member S such as a hinge. You may make it do. In this way, even after the connector 30 is attached to the fireproof wiring box 1, the side not connected by the connecting member S is opened and the fireproof processing tool 40 is attached to the connector 30. By bringing the sides that are not connected by the connecting member S into contact with each other, the entire circumference of the connector 30 can be covered with the fireproof processing tool 40. Thereby, even if it is the ring-shaped fireproof processing tool 40, it becomes possible to attach regardless of the timing which attaches the connector 30 to the fireproof wiring box 1, and the versatility of work improves.

  In the second embodiment, as shown in FIG. 10, when the knock portion 26a is removed and two cable insertion holes 26 are opened in the upper side wall 22a, the fireproof processing tool 50 is connected to each cable insertion hole. 26 may be attached to the connector 30 connected to the terminal 26 and the opening ends 50b facing each other may be brought into contact with each other. By doing so, the entire circumference of the connector 30 is covered by the two fireproofing tools 50.

  In the second embodiment, as shown in FIG. 11, when the knock portion 26a is removed and two cable insertion holes 26 are opened in the upper side wall 22a, two connectors are provided inside the fireproof processing tool 50. You may form the fireproof processing tool 50 of the magnitude | size which can accommodate 30. FIG. And you may make it cover the opening end 50b of the fireproof processing tool 50 with the metal cover member F. FIG.

  In the second embodiment, the opening width of the fireproof processing tool 50 may be smaller than the outer diameter of the connector 30. That is, the fireproof processing tool 50 can be elastically deformed by cutting out a part of the fireproof processing tool 50 in the height direction. Therefore, if the opening of the fireproof processing tool 50 is expanded and press-fitted into the connector 30, the fireproof processing tool 50 can be attached to the connector 30.

In the first and second embodiments, the bottom plate may not be formed.
The insertion portion of the connector 30 may be a male screw, a nut may be inserted into the wiring box 10, and the connector 30 may be attached to the fireproof cover 20 by screw tightening. In this way, even if the second locking claw 32a and the like are not formed, the insertion portion enters the cable insertion hole 26 by screwing the insertion portion, so that it can be attached more firmly.

The entire height direction of the connector 30 may be covered with a fireproof processing tool.
○ The insertion hole 25 may be covered with the sheet material 60. According to this, the fireproof function of the fireproof wiring box 1 can be further improved.

The wiring box 10 may be made of metal. In this case, the fireproof cover 20 need not be used.
In the first and second embodiments, the fireproof processing tool is formed of steel, but may be formed of other metal materials. Moreover, you may form a fireproof processing tool with the other nonflammable material which has nonflammability, or the semi-incombustible material which has nonflammability. In addition, the “semi-incombustible material” here refers to a quasi-incombustible material that meets the technical standards specified in Article 1-5 of the Building Standard Law Enforcement Ordinance.

  The length N3 between the outer peripheral surfaces of the opposing second locking claws 32a may be slightly smaller than the inner diameter N5 of the opening 40a. According to this, it becomes possible for the 2nd latching claw 32a before elastic deformation to pass the opening 40a.

○ The flange 24 may be deleted.
O The conduit D in each embodiment may not be formed in an uneven shape and may be flush.

Next, a technical idea that can be grasped from the above embodiment and another example will be added below.
(A) The conduit connector refractory member according to claim 1 or 2, wherein the conduit connector refractory member is formed by notching a part of a circumferential direction in a height direction.

  D ... Conduit, 1 ... Fireproof wiring box, 10 ... Wiring box, 20 ... Fireproof cover, 22a ... Firewall upper wall, 30 ... Connector, 31 ... Connector body, 32 ... Mounting part, 40,50 ... Wire Fire-resistant processing tool as a pipe connector fire-resistant member, 40a, 50a ... Opening of the fire-resistant processing tool, 41, 51 ... Bottom plate of the fire-resistant processing tool, 42, 52 ... Peripheral wall as a covering portion, 60 ... Fire-resistant member for a conduit connector Sheet material.

Claims (4)

A fireproof member for a conduit connector having nonflammability covering the outer periphery of a connector made of synthetic resin used for connecting a conduit to a peripheral wall of a fireproof wiring box,
A cover portion that covers at least an outer periphery of a portion adjacent to the peripheral wall; and the fireproof member for a conduit connector is attached to the outer periphery of the connector, and the cover portion is in contact with the peripheral wall at one end side. A refractory member for a conduit connector in which the connector is attached to a peripheral wall so that the covering portion covering the outer periphery of the adjacent portion is maintained in a state of being continuous with the peripheral wall without a gap.   The fireproof member for a conduit connector according to claim 1, wherein the covering portion is formed in a ring shape. A fireproof member for a conduit connector having nonflammability covering the outer periphery of a connector made of synthetic resin used for connecting a conduit to a peripheral wall of a fireproof wiring box,
A state in which at least a covering portion covering the outer periphery of the adjacent portion with the peripheral wall is provided, and when the connector is attached to the peripheral wall, the covering portion covering the outer periphery of the adjacent portion is continuous with the peripheral wall without a gap Maintained on
The said coating | coated part is a fireproof member for conduit connectors which is a sheet | seat material which consists of a metal, and is affixed on the said connector to the end surface of the said adjacent part, or exceeding this end surface. A fireproof wiring box with a peripheral wall;
A connector made of synthetic resin that is attached to the peripheral wall and connects a conduit to the peripheral wall,
The apparatus which consists of the fireproof member for conduit connectors as described in any one of Claim 1 to 3 which covers the outer periphery of the said connector.

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