JP6529525B2 - Protective tube cover, protective tube connector cover, and method for improving fire resistance of electric wire or light guide line - Google Patents

Description

  The present invention relates to various kinds of electric wires (including cables and the like) for electric power and communication, and electric wires for containing and protecting various light guide lines (including optical fibers and the like) for energy transmission and communication. Alternatively, the present invention relates to a protective pipe for light guide line, a hollow protective pipe connector for connecting a plurality of protective pipes, a protective pipe cover for covering the protective pipe, and a protective pipe connector cover for covering the protective pipe connector.

  DESCRIPTION OF RELATED ART Conventionally, the conduit which is a protective tube for electric wires which accommodates and protects various electric wires, such as for electric power and communication, inside is provided (for example, following patent document 1, 2). A conduit does not serve as a building material such as a pillar or a weir, and is a dedicated protective tube for accommodating and protecting various kinds of wires inside. In addition, a hollow conduit connector for connecting a plurality of conduits is also provided (for example, FIG. 3 of Patent Document 3 below).

  Conventional conduits were made of metal or resin. Moreover, the conventional conduit connector was also made of metal or resin.

JP, 2015-012724, A JP, 2013-183589, A Japanese Patent Application Laid-Open No. 7-143641

  However, in the conventional metal conduit, the heat conductivity of the metal is extremely high, so high heat from the fire is easily transmitted from the outside of the conduit to the inside of the conduit, whereby the coated portion of the wire melts in a short time The wire is damaged, and the wire is broken or shorted in a short time. Further, in the conventional resin conduit, even if heat resistant resin is used, the heat resistance is limited, so high heat from a fire is transmitted to the wire in a short time, and the wire is also broken in a short time Or short circuit.

  Further, since the conventional conduit connector is also made of metal or resin, a fire is caused to the electric wire guided into the conduit connector via the conduit connected to the conduit connector. High heat from the outside is transmitted from the outside of the conduit connector in a short time, whereby the coated portion of the wire melts in a short time, the wire is damaged, and the wire is still in a location in the conduit connector. It will break or short in a short time.

  For example, in public facilities and other buildings, when a wire breaks or is shorted due to a fire and a power failure occurs, an emergency light is turned on to indicate an evacuation route. However, when the normal lighting is turned off due to the blackout, it becomes considerably darker, and it becomes easier to interfere with evacuation compared with the case where the normal lighting is turned on, and the anxiety of the evacuees increases. . If the wires that are disconnected or shorted due to a fire are communication wires etc., communication and alarms with the inside of the hall and outside will become inoperable, which may interfere with evacuation or delay fire-fighting activities etc. Resulting in.

  The circumstances described above are not limited to conduits and conduit junctions, but are various types of light guide lines (including optical fibers etc.) for energy transmission and communication, etc. The same applies to protective pipe connectors that connect such protective pipes.

  The present invention has been made in view of such circumstances, and can improve the resistance of the electric wire or the light guide line against a fire, and thereby, the time until the electric wire or the light guide line breaks or shorts due to the fire. It is an object of the present invention to provide a protective pipe, a protective pipe connector, a protective pipe cover and a protective pipe connector cover which can be extended.

  The following aspects are presented as means for solving the problems. The protective tube for electric wire or light guide line according to the first aspect is made of wood made of solid wood or other wood-based material.

  Examples of the other wood-based materials include materials obtained by reconstituting its components (eg, wood chips, wood flour, plate-like materials, fibrous materials, etc.) obtained from solid wood. Specifically, as the above-mentioned other wood-based materials, particle board, medium density fiber board (MDF), plywood, laminated wood, laminated board material (LVL), cross laminated timber (CLT), oriented strand board Materials such as (OSB) can be mentioned. Also, specifically, as the above-mentioned other wood-based materials, materials obtained by solidifying and molding wood powder, wood chips, wood fiber materials, wood plate materials with resin, flame retardants, etc. Can. This point is the same as in the fourth, sixth and ninth aspects described later.

  The thermal conductivity of wood is significantly lower than that of metals, and wood also has higher heat resistance than resins. Therefore, since the protective tube according to the first aspect is made of wood, high heat due to a fire is less likely to be transmitted to the electric wire or the light guide inside compared to a metallic or resin protective tube. Therefore, according to the first aspect, the resistance of the electric wire or the light guide line to the fire can be enhanced, whereby the time until the electric wire or the light guide line is broken or shorted by the fire can be extended. .

  In the protective tube according to the second aspect, in the first aspect, the wood has a cylindrical shape as a whole, and has a plurality of configurations each having a cross-sectional shape that is a part of the entire circumference of the cylindrical cross-sectional shape. It has a member.

  In the second aspect, an example in which the protective tube is configured by a plurality of constituent members is given. However, the protective tube according to the first aspect may be constituted by a tubular member which is a single member. In this case, the protective tube can be made of, for example, a solid material obtained by hollowing out the central portion of the thinned material from which the epidermis has been removed.

  The protective pipe according to the third aspect is the one according to the first or second aspect, wherein the wood is subjected to the treatment of incombustibility, semi-incombustibility or incombustibility.

  The difference between non-combustible, semi-non-combustible and non-combustible is the difference in degree of non-combustibility, and in the order of non-combustible, semi-non-combustible and non-combustible, it approaches ideal non-combustible. As the treatment, various treatments and treatment agents can be adopted. For example, treatment of impregnating a wood with a flame retardant or flame retardant under reduced pressure, or a flame retardant or flame retardant applied to the surface of the wood Processing etc. can be mentioned. As the flame retardant or flame retardant, for example, a phosphoric acid-based or boric acid-based processing agent can be used. These points are the same as in the fifth, eighth and tenth aspects described later.

  According to the third aspect, since the wood is treated to be incombustible, semi-incombustible or incombustible, the wood is less likely to burn, and therefore the resistance of the electric wire or the light guide line to fire is further enhanced. It can be enhanced, which can further extend the time until the wire or light guide is broken or shorted by the fire. However, in the first and second aspects, the wood does not necessarily have to be treated with non-combustible, semi-non-combustible or incombustible.

  The protective tube connector according to the fourth aspect is a hollow protective tube connector for connecting a plurality of protective tubes for electric wires or light guide lines, which is made of wood made of solid wood or other wood-based materials It is Each of the plurality of protective tubes may be a protective tube according to any one of the first to third aspects. In the protective tube connector according to the fourth aspect, in use, the electric wire or the light guide line is led out from at least one protective tube of the plurality of protective tubes into the protective tube connector and at least another It will be introduced into one protective tube.

  Since the protective tube connector according to the fourth aspect is made of wood, high heat due to a fire is less likely to be transmitted to the internal electric wires or light guide lines, as compared with metallic or resin protective tube connectors. Therefore, according to the said 4th aspect, tolerance of the electric wire or light guide line with respect to a fire can be improved, and, thereby, time until an electric wire or light guide line breaks or short-circuits by fire can be extended.

  The protective pipe connector according to a fifth aspect is the one according to the fourth aspect, wherein the wood is subjected to a treatment for incombustible, semi-incombustible or incombustible.

  According to the fifth aspect, since the wood is treated to be incombustible, semi-incombustible or incombustible, the wood is less likely to burn, and therefore the resistance of the electric wire or the light guide line to fire is further enhanced. It can be enhanced, which can further extend the time until the wire or light guide is broken or shorted by the fire. However, in the said 4th aspect, the said wood does not necessarily need to perform the process of non-combustibility, semi-non-combustibility, or incombustibility.

  The protective tube cover according to the sixth aspect is a protective tube cover for covering a metallic or resin protective tube for electric wire or light guide line, which is made of wood made of solid wood or other wood-based material It is.

  The protective pipe cover according to the sixth aspect is made of wood and covers the metal or resin protective pipe, so it is difficult for the high heat from the fire to be transmitted to the internal protective pipe and, consequently, the high heat from the fire is the electric wire or the internal electric wire It becomes difficult to reach the light guide line. Therefore, according to the sixth aspect, although the metal or resin protective tube is used, the resistance of the electric wire or the light guide line to the fire can be enhanced, whereby the electric wire or the electric wire or the fire is caused by the fire. The time until the light guide line is broken or shorted can be extended.

  The protective pipe cover according to the sixth aspect may be attached to, for example, an existing metal or resin protective pipe.

  In the protective tube cover according to the seventh aspect, in the sixth aspect, the wood has a cylindrical shape as a whole and has a plurality of cross sectional shapes each forming part of the entire circumference of the cylindrical cross sectional shape. It has a component.

  Since the protective tube cover according to the seventh aspect is composed of a plurality of constituent members, it can be easily attached to an existing metallic or resin protective tube.

  The protective pipe cover according to the eighth aspect is the one according to the sixth or seventh aspect, wherein the wood is subjected to the treatment for incombustible, semi-incombustible or incombustible.

  According to the eighth aspect, since the wood is treated to be incombustible, semi-incombustible or incombustible, the wood is less likely to burn, and therefore the resistance of the electric wire or the light guide line to fire is further enhanced. It can be enhanced, which can further extend the time until the wire or light guide is broken or shorted by the fire. However, in the sixth and seventh aspects, the wood does not necessarily have to be treated to be noncombustible, semicombustible or incombustible.

  The protective tube connector cover according to the ninth aspect is a protective tube connector cover for covering a metallic or resin hollow protective tube connector for connecting a plurality of protective tubes for electric wires or light guide lines, It is composed of wood made of solid wood or other wood-based materials.

  Since the protective pipe connector cover according to the ninth aspect is made of wood and covers the metal or resin protective pipe connector, it becomes difficult for the high heat from the fire to be transmitted to the internal protective pipe connector and, consequently, the fire High heat is less likely to be transmitted to the internal wires or light guide lines. Therefore, according to the ninth aspect, even though the metal or resin protective tube connector is used, the resistance of the electric wire or the light guide line to the fire can be enhanced, whereby the fire is caused by the fire. It is possible to extend the time until the wire or the light guide line breaks or shorts.

  The protective pipe connector cover according to the ninth aspect may be attached to, for example, an existing metal or resin protective pipe connector.

  The protective pipe connector cover according to a tenth aspect is the one according to the ninth aspect, wherein the wood is subjected to a treatment for incombustible, semi-incombustible or incombustible.

  According to the tenth aspect, since the wood is treated to be incombustible, semi-incombustible or incombustible, the wood is less likely to burn, and therefore the resistance of the electric wire or the light guide line against fire is further enhanced. It can be enhanced, which can further extend the time until the wire or light guide is broken or shorted by the fire. However, in the ninth aspect, the wood does not necessarily have to be treated to be noncombustible, semi-combustible or incombustible.

  According to the present invention, it is possible to enhance the resistance of the electric wire or the light guide line against a fire, thereby extending the time until the electric wire or the light guide line is broken or short-circuited by the fire. A connector, a protective pipe cover and a protective pipe connector cover can be provided.

FIG. 1 is a schematic view showing a conduit according to a first embodiment of the present invention. It is a schematic sectional drawing which shows the mode before and behind connection of the conduits shown in FIG. It is a schematic sectional drawing which shows the mode before and behind connection of the conduits by the 2nd Embodiment of this invention. It is the schematic which shows the conduit according to the 3rd Embodiment of this invention. It is a schematic plan view which shows the use condition of the electrical conduit connection by the 4th Embodiment of this invention. It is a J-J 'arrow line view in FIG. It is a K-K 'arrow line view in FIG. It is a schematic sectional drawing in alignment with the L-L 'line | wire in FIG. It is a schematic plan view which shows the use condition of the conduit-pipe connection tool by the 5th Embodiment of this invention. It is a M-M 'arrow line view in FIG. It is an N-N 'arrow line view in FIG. It is a schematic sectional drawing in alignment with the O-O 'line | wire in FIG. It is a schematic perspective view which shows the conduit tube coupling tool by a comparative example typically. It is a schematic longitudinal cross-sectional view which expands and shows vicinity of the R section in FIG. FIG. 16 is a schematic perspective view schematically showing a usage state of the conduit cover according to the sixth embodiment of the present invention and the conduit cover according to the seventh embodiment of the present invention. It is a schematic longitudinal cross-sectional view which expands and shows S part vicinity in FIG.

  Hereinafter, a protective pipe, a protective pipe connector, a protective pipe cover, and a protective pipe connector cover according to the present invention will be described with reference to the drawings.

  First Embodiment

  FIG. 1 (a) is a schematic front view showing a conduit 1 which is a protective tube for a wire according to a first embodiment of the present invention. FIG.1 (b) is an A-A 'arrow line view in FIG. 1 (a). FIG.1 (c) is a B-B 'arrow line view in FIG. 1 (a). FIG.1 (d) is a C-C 'arrow line view in FIG. 1 (a). FIG.1 (e) is a D-D 'arrow line view in Fig.1 (a).

  The conduit 1 according to the present embodiment is formed of a cylindrical member 11 which is a single member made of wood. In the hole 11 a in the center of the cylindrical member 11, various electric wires (not shown) for electric power, communication and the like are inserted. Thereby, the conduit tube 1 accommodates and protects an electric wire inside. The electric conduit 1 does not serve as a building material such as a column or a weir, and is a dedicated protective pipe for accommodating and protecting various electric wires inside. This point is the same for the respective conduits described later.

  In the present embodiment, on the left side portion of the cylindrical member 11 in FIGS. 1 (a) and 1 (e), a convex portion 11b whose outer diameter is smaller than that of other portions is formed. On the right side of the cylindrical member 11 in FIGS. 1 (a) and 1 (e), a recess 11c whose inner diameter is larger than that of the other portion is formed. The convex portion 11 b and the concave portion 11 c are formed to have dimensions that fit each other.

  In the present embodiment, the cylindrical member 11 is made of a solid wood as a wood, and for example, the center portion of a thinning material of cedar, rattan or the like from which the skin is removed is hollowed out with a gun drill or the like to form a hole 11a. It can be made of solid wood. In this case, for example, the length can be about 100 cm, the outer diameter of the part other than the convex part 11 b can be about 10 cm, and the inner diameter of the part other than the concave part 11 c can be about 5 cm. In the case of the thinning material, it is preferable that the core material be removed by the hole 11a if the kind of the tree is a kind that distinguishes the core material on the center side and the sapwood on the peripheral side like cedar and mulberry. The reason is that in the case where the cylindrical member 11 is subjected to incombustible, semi-incombustible or incombustible treatment, when the liquid non-combustible or flame retardant is impregnated into the wood as the treatment, the side is more than the core material. Since the material more easily penetrates the flame retardant and the flame retardant, the flame retardant and the flame retardant can penetrate more easily from the inside of the cylindrical member 11 and the incombustibility can be advanced more favorably. It is. Moreover, when a node hole is present in the cylindrical member 11, it is preferable to embed the node hole with wood other than nodes, and when a node is present in the cylindrical member 11, the node is removed and the node is removed. It is preferable to embed with wood other than. Such embedding treatment is preferably performed before the treatment for non-combustible, semi-non-combustible or incombustible treatment.

  However, in the present invention, the wood constituting the conduit 1 is not limited to solid wood, and may be other wood-based materials. Examples of other wood-based materials include materials obtained by reconstituting its components (for example, wood chips, wood flour, plate-like materials, fibrous materials, etc.) obtained from solid wood. Specifically, as the above-mentioned other wood-based materials, particle board, medium density fiber board (MDF), plywood, laminated wood, laminated board material (LVL), cross laminated timber (CLT), oriented strand board Materials such as (OSB) can be mentioned. Also, specifically, as the above-mentioned other wood-based materials, materials obtained by solidifying and molding wood powder, wood chips, wood fiber materials, wood plate materials with resin, flame retardants, etc. Can. A member made of a material formed by solidifying wood powder, wood chips, wood fiber materials or wood plate materials with resin, flame retardant, flame retardant, etc. is also treated with non-combustible, semi-non-combustible or incombustible treatment It is one of the members These points are the same for the wood to be described later.

  In the present embodiment, the cylindrical member 11 is subjected to the treatment of non-combustibility, semi-non-combustibility or incombustibility. As this treatment, various treatments and treatment agents can be adopted. For example, treatment of impregnating wood with liquid non-combustible agent, flame retardant, etc. in a reduced pressure state, non-flammable agent, flame retardant, etc. as the surface of the wood And the like. As the flame retardant or flame retardant, for example, a phosphoric acid-based or boric acid-based processing agent can be used. These points are the same as in the processing of non-combustible, semi-non-combustible or incombustible wood described later. Although the above process may be performed only on the side (outside surface in the present embodiment) which is the outer side of the conduit 1, the surface (the hole 11 a in the present embodiment) which is the inside of the conduit 1. It is preferable to apply the above treatment to the inner surface side). In this case, when impregnating the cylindrical member 11 with a liquid non-combustible agent, a flame retardant, or the like, the impregnation may be performed after the holes 11 a are formed. After the liquid flame retardant, flame retardant and the like are infiltrated into the cylindrical member 11, after drying, the surface may be adjusted with a sander or the like, if necessary.

  Fig.2 (a) is a schematic sectional drawing which shows typically a mode before connecting electric conduit 1 1 comrades shown in FIG. 1 directly in a straight pipe shape. FIG.2 (b) is a schematic sectional drawing which shows typically a mode after the electrical conduits 1 comrades shown in FIG. 1 are directly connected in a straight pipe shape. 2 (a) and 2 (b) correspond to FIG. 1 (e).

  As shown in FIG. 2 (b), by fitting the convex portion 11b of one conduit 1 to the recess 11c of the other conduit 1, the two conduits 1 are directly connected in a straight tubular shape. be able to. At this time, the two electric conduits 1 may be fixed, for example, by press-fitting the convex portion 11b into the concave portion 11c, or may be performed by an adhesive, as indicated by an arrow Y1 in FIG. It may be carried out by screwing a wood screw (not shown) from the position shown in the direction indicated by the arrow Y1.

  The thermal conductivity of wood is significantly lower than that of metals, and wood also has higher heat resistance than resins. Therefore, since the conduit tube 1 according to the present embodiment is made of wood, high heat caused by a fire is less likely to be transmitted to the internal wires, as compared to a metallic or resin conduit tube. For this reason, according to the present embodiment, the resistance of the wire to a fire can be enhanced, whereby the time until the wire breaks or shorts due to the fire can be extended.

  In addition, when the electric wire itself inside the electric conduit 1 is broken and a short circuit occurs, the high heat generated by the short circuit is insulated by the electric conduit 1 made of wood and is difficult to be transmitted to the outside. Therefore, even if a flammable material is present on the outside of the conduit 1, it does not spread on the outside of the conduit 1, and a fire caused by a short circuit of the wire can be prevented. In addition, even if it fires once by the short circuit of the electric wire in the electric pipe 1, oxygen in the electric pipe 1 will be exhausted soon, and it will be automatically extinguished.

  Furthermore, in the present embodiment, the cylindrical member 11 which is wood constituting the electric conduit 1 is subjected to the treatment of noncombustibility, semicombustibility or incombustibility. Therefore, since the wood is less likely to burn, the resistance of the wire to a fire can be further enhanced, whereby the time until the wire breaks or shorts due to the fire can be further extended. However, in the present invention, the wood does not necessarily have to be treated to be non-combustible, semi-non-combustible or incombustible.

  Second Embodiment

  Fig.3 (a) is a schematic sectional drawing which shows typically a mode before the electrical conduit 21 each other according to the 2nd Embodiment of this invention is directly connected in a straight pipe shape, and respond | corresponds to Fig.2 (a). doing. FIG. 3 (b) is a schematic cross-sectional view schematically showing a state after connecting the electric conduits 21 according to the second embodiment of the present invention directly in a straight pipe shape, corresponding to FIG. 2 (b) doing. In FIGS. 3 (a) and 3 (b), the same or corresponding elements as or to the elements in FIGS. 2 (a) and 2 (b) are denoted by the same reference numerals.

  In the place where the conduit 21 according to the present embodiment differs from the conduit 1 according to the first embodiment, an externally threaded portion 11 d is formed on the outer periphery of the convex portion 11 b of the cylindrical member 11 and the recess 11 c of the cylindrical member 11 A female screw portion 11e is formed on the inner circumference of the pipe, and fixing of the two electric conduits 1 is performed by screwing the male screw portion 11d and the female screw portion 11e.

  The same advantages as those of the first embodiment can be obtained also by this embodiment.

  Third Embodiment

  FIG. 4 (a) is a schematic front view showing a conduit 31 according to a third embodiment of the present invention, and corresponds to FIG. 1 (a). FIG. 4 (b) is a view on arrow E-E 'in FIG. 4 (a), which corresponds to FIG. 1 (b). FIG.4 (c) is an F-F 'arrow line view in FIG. 4 (a), and respond | corresponds to FIG.1 (c). FIG. 4 (d) is a view on arrow G-G 'in FIG. 4 (a), and corresponds to FIG. 1 (d). FIG. 4 (e) is a view on arrow H-H 'in FIG. 4 (a), which corresponds to FIG. 1 (e).

  The conduit tube 31 according to the present embodiment is made of wood, and the wood has a plurality of constituent members each having a tubular shape as a whole and each having a cross-sectional shape that is a part of the entire circumference of the tubular cross-sectional shape Have. Specifically, the wood constituting the conduit 31 according to the present embodiment includes two cross-sectionally arc-shaped members 11A and 11B having a cylindrical shape as a whole as the plurality of constituent members. In the present invention, the wood may have three or more cross-sectionally arc-shaped members having a cylindrical shape as a whole. Further, in the present invention, the wood may have a cylindrical shape (for example, a square cylindrical shape) other than the cylindrical shape. Furthermore, in the present invention, the number of the plurality of constituent members having a cross-sectional shape which is cylindrical as a whole and which is a part of the entire circumference of the cylindrical cross-sectional shape may be two or more.

  In the present embodiment, as shown in FIG. 4, the two cross-sectionally arc-shaped members 11A and 11B are obtained by dividing the cylindrical member 11 in FIG. It becomes the same as the cylindrical member 11 in FIG. In the present embodiment, as shown in FIGS. 4 (b) to 4 (d), relatively small steps forming concavities and convexities to be fitted to each other are formed on the joint surfaces of the two cross-sectional arc-shaped members 11A and 11B. . However, such a step does not necessarily have to be formed.

  Holding of the cylindrical form of the cross-sectional arc-shaped members 11A and 11B may be performed, for example, by bonding the cross-sectional arc-shaped members 11A and 11B with an adhesive, as shown by arrow Y2 in FIG. It may be performed by joining a cross-sectional arc-shaped member 11A, 11B by screwing a wood screw (not shown) in the direction indicated by the arrow Y2 from the position, or making the outer periphery of the cross-sectional arc-shaped member 11A, 11B metal or the like (Not shown) (for example, a band such as a hose band).

  The two cross-sectional arc members 11A and 11B correspond to the cylindrical member 11 in FIG. 1 as a whole, and the inner space 11Aa of the cross-sectional arc member 11A and the inner space 11Ba of the cross-sectional arc member 11B as a whole in FIG. This corresponds to the hole 11a in the central portion of the cylindrical member 11, and the convex portion 11Ab of the cross-sectional arc-shaped member 11A and the convex portion 11Bb of the cross-sectional arc-shaped member 11B correspond to the convex portion 11b of the cylindrical member 11 in FIG. The recess 11Ac of the arc-shaped member 11A and the recess 11Bc of the arc-shaped member 11B correspond to the recess 11c of the cylindrical member 11 in FIG. 1 as a whole.

  The same advantages as those of the first embodiment can be obtained also by this embodiment.

  Further, in the present embodiment, since the conduit 31 is constituted by the two cross-sectionally arc-shaped members 11A and 11B, for example, it is a long thinning material or the like so that it is difficult to hollow out the central portion with a gun drill or the like. However, if it is divided into two, it is possible to cut away the portions corresponding to the inner spaces 11Aa and 11Ba for each of the two split members, so it is possible to configure each single conduit 31 to be long.

  Fourth Embodiment

  FIG. 5 is a schematic plan view showing a usage state of the conduit and pipe connector 41 according to the fourth embodiment of the present invention. 6 is a J-J 'arrow view in FIG. FIG. 7 is a view on arrow K-K 'in FIG. FIG. 8 is a schematic cross-sectional view along the line L-L 'in FIG. In addition, illustration of the electric wire is abbreviate | omitted in FIG. 5 thru | or FIG.

  The conduit connection device 41 according to the present embodiment is a hollow conduit connection device for connecting a plurality of conduits 1 and is made of wood made of solid wood or other wood-based material.

  Specifically, the conduit connection 41 according to the present embodiment couples two conduits 1 shown in FIG. 1. The electric pipe connection device 41 according to the present embodiment is configured in a rectangular box shape by four side plates 42 to 45, an upper plate 46, and a bottom plate 47 made of wood. Although not shown in the drawings, the side plates 42 to 45, the upper plate 46 and the bottom plate 47 are fixed to each other by an adhesive or a wood screw or the like to form a box shape. The side plate 42 is formed with a mounting hole 42 a into which the convex portion 11 b of the cylindrical member 11 of the conduit 1 is fitted. In the side plate 43 orthogonal to the side plate 42, a mounting hole 43a is formed in which the convex portion 11b of the cylindrical member 11 of the other electric pipe 1 is fitted. The convex portions 11b of the cylindrical members 11 of the respective conduits 1 are respectively fitted in the mounting holes 42a and 43a, and the conduits 1 are respectively fixed to the side plates 42 and 43 by an adhesive or the like.

  The electric conduit connector 41 according to the present embodiment fixes five plates of the side plates 42 to 45, the upper plate 46 and the bottom plate 47 except the upper plate 46 (or the bottom plate 47) before use. Instead, only the top plate 46 (or the bottom plate 47) is removed from the five plates as a lid. In use of the conduit connection device 41 according to the present embodiment, the two conduits 1 are respectively attached to the mounting holes 42a and 43a, and the electrical wires (not shown) are connected from one conduit 1 to the conduit connection device. It is led out into 41 and from there into the other conduit. As a result, the electric wire is bent by 90 ° in the conduit connector 41. Thereafter, the upper plate 46 (or the bottom plate 47) is covered by being fixed to the other five plates, and the conduit connection 41 according to the present embodiment is put into use. Thus, the conduit connection 41 according to the present embodiment is used, for example, at a point where the wire is bent by 90 °.

  In the present embodiment, the side plates 42 to 45, the top plate 46, and the bottom plate 47 are subjected to processing for noncombustibility, semicombustibility or incombustibility. The above treatment may be applied only to the side surface of the side plates 42 to 45, the upper plate 46, and the bottom plate 47, but the side plate 42 to 45, the upper plate 46, and the inner side surface of the bottom plate 47 may be subjected to the above treatment. Is preferred.

  Since the conduit connector 41 according to the present embodiment is made of wood, high heat due to a fire is less likely to be transmitted to the internal wires, as compared to a metallic or resin conduit connector. Therefore, according to the present embodiment, the resistance of the wire to a fire can be enhanced, whereby the time until the wire breaks or shorts due to the fire can be extended.

  Further, according to the present embodiment, the side plates 42 to 45, the upper plate 46 and the bottom plate 47 which are woods constituting the electric pipe and tube connector 41 are subjected to the treatment of incombustibility, quasi incombustibility or incombustibility. There is. Therefore, since the wood is less likely to burn, the resistance of the wire to a fire can be further enhanced, whereby the time until the wire breaks or shorts due to the fire can be further extended. However, in the present invention, the wood does not necessarily have to be treated to be non-combustible, semi-non-combustible or incombustible.

  In the present embodiment, in place of the conduit 1 shown in FIG. 1, the conduit 21 shown in FIG. 3 may be modified to be connected. In this case, in the mounting holes 42a and 43a, a female screw portion is formed in which the male screw portion 11d formed on the convex portion 11b of the conduit 21 is screwed. By screwing the male screw part 11d of the convex part 11b of each electric wire tube 21 into the female screw part of the attachment holes 42a and 43a, the electric wire tubes 21 can be fixed to the side plates 42 and 43.

  Fifth Embodiment

  FIG. 9 is a schematic plan view showing the usage condition of the conduit-tube connector 51 according to the fifth embodiment of the present invention. FIG. 10 is a view on arrow M-M 'in FIG. 11 is a view on arrow N-N 'in FIG. FIG. 12 is a schematic cross-sectional view taken along the line O-O 'in FIG. A schematic sectional view taken along the line P-P 'in FIG. 9 and a schematic sectional view taken along the line Q-Q' in FIG. 9 are the same as FIG. In FIG. 9 to FIG. 12, the illustration of the electric wire is omitted.

  The conduit connection device 51 according to the present embodiment is also a hollow conduit connection device for connecting a plurality of conduits 1 and is made of wood made of solid wood or other wood-based material.

  Specifically, the conduit connection device 51 according to the present embodiment connects the six conduits 1 shown in FIG. The electric conduit connection 51 according to the present embodiment is configured in a box shape of a regular hexagonal column by six side plates 52 to 57, a top plate 58 and a bottom plate 59 made of wood. Although not shown in the drawings, the side plates 52 to 57, the top plate 58 and the bottom plate 59 are fixed to each other by an adhesive or a wood screw or the like to form a box shape. In the side plates 52 to 57, mounting holes 52a, 53a, 54a, 55a, 56a, 57a in which the convex portion 11b of the cylindrical member 11 of the electric pipe 1 is fitted are respectively formed. The convex portions 11b of the cylindrical members 11 of the respective conduits 1 are respectively fitted in the mounting holes 52a, 53a, 54a, 55a, 56a, 57a, and the conduits 1 are respectively attached to the side plates 52 to 57 by an adhesive or the like. It is fixed.

  Before use, the conduit connection device 51 according to the present embodiment fixes seven plates other than the upper plate 58 (or the lower plate 59) among the side plates 52 to 57, the upper plate 58 and the bottom plate 59 to one another Instead, only the top plate 58 (or the bottom plate 59) is removed from the seven plates as a lid. In the conduit connector 51 according to the present embodiment, six conduits 1 are attached to the mounting holes 52a, 53a, 54a, 55a, 56a, 57a, respectively, and the five conduits from one conduit 1 are used. (Not shown) is led out into the conduit connection 51 and the five electrical wires are introduced therefrom into the other five conduits 1 respectively. As a result, the five wires drawn from one conduit 1 into the conduit connector 51 are branched into five conduits 1 respectively. Thereafter, the upper plate 58 (or the bottom plate 59) is covered by being fixed to the other seven plates, and the conduit connection 51 according to the present embodiment is put into use. Thus, the conduit connection 51 according to the present embodiment is used, for example, at a branch point of a wire.

  In the present embodiment, the side plates 52 to 57, the upper plate 58, and the bottom plate 59 are subjected to non-combustible, semi-non-combustible, or non-combustible treatment. Although the above treatment may be applied only to the side of the outer side of the side plates 52 to 57, the upper plate 58 and the bottom plate 59, the above treatment may be applied to the inner side of the side plates 52 to 57, the upper plate 58 and the bottom plate 59. Is preferred.

  Since the conduit connector 51 according to the present embodiment is made of wood, high heat due to a fire is less likely to be transmitted to the internal wires, as compared to a metallic or resin conduit connector. Therefore, according to the present embodiment, the resistance of the wire to a fire can be enhanced, whereby the time until the wire breaks or shorts due to the fire can be extended.

  Further, according to the present embodiment, the side plates 52 to 57, the upper plate 58 and the bottom plate 59, which are woods constituting the electric pipe and tube connector 51, are subjected to incombustible, semi-incombustible or incombustible treatments. There is. Therefore, since the wood is less likely to burn, the resistance of the wire to a fire can be further enhanced, whereby the time until the wire breaks or shorts due to the fire can be further extended. However, in the present invention, the wood does not necessarily have to be treated to be non-combustible, semi-non-combustible or incombustible.

  In the present embodiment, in place of the conduit 1 shown in FIG. 1, the conduit 21 shown in FIG. 3 may be modified to be connected. In this case, in the mounting holes 52a, 53a, 54a, 55a, 56a, 57a, female screw parts are formed, into which the male screw parts 11d formed on the convex parts 11b of the conduit 21 are screwed. Fixing each conduit tube 21 to the side plates 52 to 57 by screwing the male screw portion 11d of the convex portion 11b of each conduit tube 21 with the female screw portion of the mounting holes 52a, 53a, 54a, 55a, 56a, 57a. it can.

  Further, in the present embodiment, for example, the side plates 53, 55, 57 do not have the attachment holes 53a, 55a, 57a, and the side plates 53, 55, 57 are deformed so as not to attach the conduit 1 It is also good. In this case, for example, two electric wires drawn from one conduit 1 into the conduit connection 51 can be used to branch to the other two conduits 1 respectively.

  Furthermore, in the present embodiment, for example, it may be configured to have a regular square pole shape or a regular pentagonal pole shape, and mounting holes may be provided in each side plate so as to fix the electric conduit 1 there.

  [Comparative example]

  FIG. 13 is a schematic perspective view schematically showing a conduit connection 61 according to a comparative example to be compared with the conduit connection 41 according to the fourth embodiment of the present invention described above. FIG. 14 is a schematic vertical cross-sectional view showing the vicinity of the R portion in FIG. 13 in an enlarged manner. In FIG. 14, a conduit 71 according to a comparative example to be compared with the conduit 1 according to the first embodiment of the present invention described above is also shown in phantom lines.

  The electric pipe connection device 61 according to this comparative example has a rectangular parallelepiped box-shaped metal body 62 made of metal and two metal connection pipes 63 for electric pipe connection. The connection pipe 63 is connected to the opening 62 a of the main body 62. The connection pipe 63 is provided with a pipe stopper 64 for fixing the metal conduit 71 to the connection pipe 63.

  The conduit / pipe connector 61 according to this comparative example is used, for example, at a portion where the electric wire is bent by 90 °, similarly to the conduit / pipe connector 41 according to the fourth embodiment of the present invention described above.

Although the pipe stopper 64 is provided with a screw at its tip and is screwed into the screw hole of the connection pipe 63 to fix the conduit 71, after screwing is performed, its head is further strongly twisted. And it is used to be threaded at the narrow neck 64a. It is provided in order to confirm that the fixing of the conduit 71 has been completed by confirming that there is no head from a remote position. In the case where a screw is formed inside the connection pipe 63 and the electric pipe 71 is screwed into the connection pipe 63, the pipe stopper 3 is unnecessary.
Since the conduit 71 according to this comparative example is made of metal, high heat due to a fire is easily transmitted from the outside of the conduit to the inside of the conduit, and the wires may be broken or short-circuited in a short time.

  Further, since the conduit connection device 61 according to the comparative example is made of metal, a fire is caused to the electric wire guided into the conduit connection device via the conduit connected to the connection member. High heat is transferred from the outside of the conduit connector in a short time, and the wire is also disconnected or shorted in a short time at a location in the conduit connector.

  [Sixth and Seventh Embodiments]

  FIG. 15 is a schematic perspective view schematically showing a use state of the conduit cover 81 according to the sixth embodiment of the present invention and the conduit cover 71 according to the seventh embodiment of the present invention. FIG. 16 is a schematic vertical cross-sectional view showing the vicinity of a portion S in FIG. 15 in an enlarged manner.

  The conduit cover 81 according to the sixth embodiment of the present invention is a conduit cover covering the conduit 71 made of metal according to the comparative example, and is made of wood made of solid wood or other wood-based material. It is a thing. Since the conduit cover 81 according to the present embodiment is configured in the same manner as the conduit 31 shown in FIG. 4, the detailed description thereof will be omitted. However, the size and the like of the conduit cover 81 according to the present embodiment are determined so as to cover the conduit 71.

  The conduit connection cover 91 according to the seventh aspect of the present invention is a conduit connection cover covering the conduit connection 61 made of metal according to the comparative example, and is made of solid wood or other wood-based material. It is composed of The conduit / pipe connector cover 91 according to the present embodiment is configured in the same manner as the conduit / pipe connector 41 shown in FIGS. 5 to 8, and thus the detailed description thereof will be omitted. However, the size and the like of the conduit-connector cover 91 according to the present embodiment are determined so as to cover the conduit-connector 61.

  Since the conduit cover 81 according to the sixth embodiment of the present invention is made of wood and covers the metal conduit 71, it is difficult for the high heat from the fire to be transmitted to the internal conduit 71 and, consequently, the high heat from the fire. It will be difficult to transfer to the internal wires. Therefore, according to the present embodiment, although the metal conduit 71 is used, the resistance of the wire to a fire can be enhanced, whereby the wire is disconnected or shorted by the fire. You can extend the time until

  Further, since the conduit / pipe connector cover 91 according to the seventh embodiment of the present invention is made of wood and covers the metallic conduit / pipe coupler 61, high heat due to a fire is difficult to be transmitted to the internal conduit / pipe coupler 61. As a result, it becomes difficult for the heat generated by the fire to be transmitted to the internal wires. Therefore, according to the present embodiment, although the metal conduit connector is used, the resistance of the electric wire to a fire can be enhanced, whereby the electric wire is broken or shorted by the fire. You can extend the time it takes to finish.

  The conduit cover 81 according to the present embodiment may be replaced with a metallic conduit 71 to cover a resin conduit. Further, the conduit connection tool cover 91 according to the present embodiment may be replaced with a metallic conduit connection tool 61 to cover a resin conduit connection tool.

  As mentioned above, although each embodiment of the present invention was described, the present invention is not limited to these embodiments.

  For example, in the embodiment described above, the conduit and the conduit cover are configured to have a cylindrical shape, but the conduit and the conduit cover have a cylindrical shape other than the cylindrical (for example, a square tubular) May be configured to

  Further, in the above-described embodiment, the conduit is configured as a straight tube extending linearly, but the conduit is configured as a bent tube that bends a predetermined angle (for example, 90 °) gently at a predetermined curvature. It is also good. Such a bent pipe can be manufactured, for example, by solidifying wood powder with a resin, a non-combustible agent, a flame retardant, or the like.

  Furthermore, although the embodiment described above is an example of the conduit, the conduit connector, the conduit cover, and the conduit cover, for example, the present invention is accommodated in the inside in the embodiment described above. A light guide line tube (protective tube for light guide line) and a plurality of light guide line tubes are connected by using various light guide lines (including optical fiber etc.) for energy transmission and communication instead of electric wires to be protected The present invention can also be applied to a hollow light guide tube connector, a light guide tube cover covering the light guide tube, and a light guide tube cover covering the light guide tube connector.

1,21,31 Conduit (Protective tube)
41, 51 Conduit connection (protective tube connection)
81 conduit cover (protective tube cover)
91 Conduit Pipe Cover (Protective pipe connector cover)

Claims (8)

  A cylindrical protective tube cover that covers a protective tube made of metal or resin for electric wires or light guide wires that do not constitute a building structural element and that does not have a bend, and is made of solid material or other wood A protective tube cover characterized in that it is made of wood made of a base material.   The protective pipe cover according to claim 1, wherein the wood has a plurality of constituent members having a cylindrical shape as a whole and each having a cross-sectional shape which is a part of the entire circumference of the cylindrical cross-sectional shape. . The protective pipe cover according to claim 2, wherein the joint surface of the plurality of component members is formed with a level difference which forms an unevenness to be fitted to each other.   The protective pipe cover according to any one of claims 1 to 3, wherein the wood is subjected to incombustible, semi-incombustible or incombustible treatment. It is a fire resistance improvement method of the electric wire or light guide line which raises the fire resistance of the electric wire or light guide line protected by the existing metal protective tube made of metal or resin which does not constitute a building structural element,
A method of improving fire resistance of a wire or a light guide line, comprising attaching the protective tube cover according to any one of claims 1 to 4 to the existing protective tube so as to cover the existing protective tube.   A protective tube connector cover for covering a metallic or resin hollow protective tube connector for connecting a plurality of protective tubes for electric wires or light guide wires which do not constitute a building structural element, which is a solid material or the like A protective pipe connector cover made of wood made of wood-based material.   7. The protective pipe connector cover according to claim 6, wherein the wood is subjected to incombustible, semi-incombustible or incombustible treatment. The fire resistance of the electric wire or the light guide line in the inside of a metal or resin hollow existing protective tube connector for connecting a plurality of protective tubes for electric wire or light guide line which do not constitute a building structural element It is the fire resistance improvement method of the electric wire or light guide line to raise, Comprising:
The fire protection improvement of the electric wire or the light guide line characterized by attaching the protection pipe connector cover according to claim 6 to the existing protection pipe connector so as to cover the existing protection pipe connector. Method.

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