JP2018121460A - Protective pipe, protective pipe connector, protective pipe cover, and protective pipe connector cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase resistance of electric wire lines or light guides to fires and extend a time until the wire lines or light guides break or short due to fire.SOLUTION: An electric wire pipe 1, which is a protective pipe for electric wire lines, is made of wood made of solid material or other woody material. The wood is subjected to incombustible, semi-incombustible or flame-retardant treatment.SELECTED DRAWING: Figure 1

Description

  The present invention is for electric wires that contain and protect various electric wires (including cables and the like) for power and communication, and various light guide wires (including optical fibers and the like) for energy transmission and communication. Alternatively, the present invention relates to a protective tube for a light guide line, a hollow protective tube connector that connects a plurality of protective tubes, a protective tube cover that covers the protective tube, and a protective tube connector cover that covers the protective tube connector.

  2. Description of the Related Art Conventionally, electric conduits that are protective tubes for electric wires that house and protect various electric wires for power and communication are provided (for example, Patent Documents 1 and 2 below). The electric conduit does not serve as a building material such as a pillar or a fence, but is a dedicated protective tube for accommodating and protecting various electric wires inside. Further, a hollow conduit connector that connects a plurality of conduits is also provided (for example, FIG. 3 of Patent Document 3 below).

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

Japanese Patent Application Laid-Open No. 2015-012724 JP2013-183589A Japanese Patent Application Laid-Open No. 7-143641

  However, in the conventional metal conduit, the heat conductivity of the metal is remarkably high, so that high heat due to fire is easily transmitted from the outside of the conduit to the internal wire, and the covered portion of the wire melts in a short time. The electric wire is damaged, and the electric wire is disconnected or short-circuited in a short time. In addition, in the above conventional resin conduit, even if a heat resistant resin is used, its heat resistance is limited, so high heat from a fire is transmitted to the wire in a short time, and the wire is also disconnected in a short time Or it will short-circuit.

  In addition, since the conventional conduit connector is also made of metal or resin, a fire is applied to the electric wire guided into the conduit connector via the conduit connected to the conduit connector. The high heat generated by the heat is transmitted from the outside of the conduit fitting in a short time, which melts the coated portion of the wire in a short time and damages the wire. Disconnection or short circuit in a short time.

  For example, in public facilities and other buildings, when a power failure occurs due to a wire breakage or short circuit due to a fire, an emergency light is turned on to indicate an evacuation route. However, if the normal light is turned off due to a power failure, it will be considerably darker, making it easier to evacuate and increasing the sense of anxiety of the evacuees than when the normal light is on. . If the wire that is disconnected or short-circuited due to a fire is a communication line, etc., broadcasting in the hall, communication with the outside, alarms, etc. will become inoperable, hindering evacuation or delaying fire fighting activities, etc. Resulting in.

  The circumstances described above are not limited to conduits and conduit couplers, but are protective tubes for light guides that house and protect various types of light guide wires (including optical fibers) for energy transmission and communication. The same applies to a protective tube connector for connecting such protective tubes.

  The present invention has been made in view of such circumstances, and can increase the resistance of the electric wire or the light guide line to a fire, thereby reducing the time until the electric wire or the light guide line is broken or short-circuited by the fire. It is an object to provide a protective tube, a protective tube connector, a protective tube cover, and a protective tube connector cover that can be extended.

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

  Examples of the other wood-based materials include materials obtained by reconstituting components (for example, wood pieces, wood powder, plate-like materials, fiber-like materials) obtained from solid wood. Specific examples of the other woody materials include particle board, medium density fiberboard (MDF), plywood, laminated wood, single board laminated material (LVL), cross-laminated timber (CLT), and oriented strand board. A material such as (OSB) can be given. Specifically, examples of the other wood-based materials include materials formed by solidifying wood powder, wood fragments, wood fibers, and wood plates with resin, flame retardants, flame retardants, and the like. Can do. This also applies to the fourth, sixth, and ninth aspects described later.

  The thermal conductivity of wood is significantly lower than that of metal, and wood has higher heat resistance than resin. Therefore, since the protective tube according to the first aspect is made of wood, it is difficult for high heat due to a fire to be transmitted to the internal electric wire or light guide wire as compared with a protective tube made of metal or resin. For this reason, according to the said 1st aspect, the tolerance of the electric wire or light guide line with respect to a fire can be improved, and, thereby, the time until an electric wire or a light guide line is disconnected or short-circuited by a fire can be extended. .

  According to a second aspect of the protective tube according to the first aspect, the wood has a tubular shape as a whole and has a cross-sectional shape that is a part of the entire circumference of the tubular cross-sectional shape. It has a member.

  This 2nd aspect gives the example which comprises a protective tube with a some structural member. However, the protective tube according to the first aspect may be formed of a cylindrical member forming 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 skin has been removed.

  A protective tube according to a third aspect is the protective tube according to the first or second aspect, wherein the wood has been subjected to a non-combustible, semi-incombustible or flame-retardant treatment.

  The difference between incombustibility, quasi-incombustibility, and incombustibility is the difference in the degree of incombustibility. As the treatment, various treatments and treatment agents can be employed. For example, a treatment of impregnating wood with a flame retardant or a flame retardant in a reduced pressure state, or applying a flame retardant or a flame retardant to 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 treating agent can be used. These points are the same for the fifth, eighth, and tenth modes described later.

  According to the third aspect, since the wood has been subjected to incombustibility, quasi-incombustibility, or incombustibility treatment, the wood becomes difficult to burn, so that the resistance of the electric wire or the light guide line to fire is further increased. This can increase the time until the electric wire or the light guide line is broken or short-circuited due to a fire. But in the said 1st and 2nd aspect, the said timber does not necessarily need to give the process of incombustibility, semi-incombustibility, or incombustibility.

  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 wires, and is made of wood made of a solid material or other woody material. It is a thing. Each of the plurality of protective tubes may be a protective tube according to any one of the first to third aspects. When the protective tube connector according to the fourth aspect is used, an electric wire or a light guide wire is led out from at least one of the plurality of protective tubes into the protective tube connector, and from there, 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, it is difficult for high heat due to a fire to be transmitted to the internal electric wire or light guide wire as compared to a protective tube connector made of metal or resin. Therefore, according to the said 4th aspect, the tolerance of the electric wire or light guide line with respect to a fire can be improved, and, thereby, the time until an electric wire or a light guide line is disconnected or short-circuited by a fire can be extended.

  The protective pipe connector according to a fifth aspect is the protective pipe connector according to the fourth aspect, wherein the wood is subjected to a treatment of incombustibility, quasi-incombustibility or incombustibility.

  According to the fifth aspect, since the wood has been subjected to incombustibility, quasi-incombustibility, or incombustibility treatment, the wood becomes difficult to burn. This can increase the time until the electric wire or the light guide line is broken or short-circuited due to a fire. But in the said 4th aspect, the said wood does not necessarily need to give the process of nonflammability, a semi-incombustibility, or a flame retardance.

  The protective tube cover according to the sixth aspect is a protective tube cover for covering a protective tube made of metal or resin for electric wires or light guide wires, and made of wood made of a solid material or other woody material. It is.

  Since the protective tube cover according to the sixth aspect is made of wood and covers the protective tube made of metal or resin, it is difficult for high heat due to fire to be transmitted to the internal protective tube. It becomes difficult to be transmitted to the light guide line. Therefore, according to the sixth aspect, despite the use of a metal or resin protective tube, the resistance of the electric wire or the light guide wire to fire can be increased. The time until the light guide line is broken or short-circuited can be extended.

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

  The protective tube cover according to a seventh aspect is the protective tube cover according to the sixth aspect, wherein the wood has a cylindrical shape as a whole and has a cross-sectional shape that is a part of the entire circumference of the cylindrical cross-sectional shape. It has a structural member.

  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 protective tube made of metal or resin.

  The protective tube cover according to an eighth aspect is the protective tube cover according to the sixth or seventh aspect, wherein the wood has been subjected to a non-combustible, semi-incombustible or flame-retardant treatment.

  According to the eighth aspect, since the wood has been subjected to incombustibility, quasi-incombustibility, or incombustibility treatment, the wood becomes difficult to burn, and thus the resistance of the electric wire or the light guide line to fire is further improved. This can increase the time until the electric wire or the light guide line is broken or short-circuited due to a fire. But in the said 6th and 7th aspect, the said lumber does not necessarily need to give the process of nonflammability, a semi-incombustibility, or a flame retardance.

  The protective tube connector cover according to the ninth aspect is a protective tube connector cover that covers a hollow protective tube connector made of metal or resin that connects a plurality of protective tubes for electric wires or light guide wires, It consists of wood made of solid wood or other wood-based materials.

  Since the protective tube connector cover according to the ninth aspect is made of wood and covers the protective tube connector made of metal or resin, it is difficult for high heat due to a fire to be transmitted to the internal protective tube connector. High heat is not easily transmitted to the internal electric wires or light guide lines. Therefore, according to the ninth aspect, it is possible to increase the resistance of the electric wire or the light guide line against fire in spite of the use of the protective tube connector made of metal or resin. The time until the electric wire or the light guide line is broken or short-circuited can be extended.

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

  A protective tube connector cover according to a tenth aspect is the protective pipe connector cover according to the ninth aspect, wherein the wood has been subjected to a non-combustible, semi-incombustible or flame-retardant treatment.

  According to the tenth aspect, since the wood has been subjected to incombustibility, quasi-incombustibility, or incombustibility treatment, the wood becomes difficult to burn. This can increase the time until the electric wire or the light guide line is broken or short-circuited due to a fire. But in the said 9th aspect, the said timber does not necessarily need to give the process of incombustibility, semi-incombustibility, or incombustibility.

  According to the present invention, the resistance of the electric wire or the light guide line to the fire can be increased, and thereby the time until the electric wire or the light guide line is broken or short-circuited by the fire can be extended. A connector, a protective tube cover, and a protective tube connector cover can be provided.

It is the schematic which shows the conduit tube by the 1st Embodiment of this invention. It is a schematic sectional drawing which shows the mode before and after the connection of the conduit shown in FIG. It is a schematic sectional drawing which shows the mode before and after the connection of the electric conduits by the 2nd Embodiment of this invention. It is the schematic which shows the conduit tube by the 3rd Embodiment of this invention. It is a schematic plan view which shows the use condition of the conduit connector by the 4th Embodiment of this invention. It is a J-J 'arrow directional view in FIG. It is a K-K 'arrow line view in FIG. FIG. 6 is a schematic sectional view taken along line L-L ′ in FIG. 5. It is a schematic plan view which shows the use condition of the conduit connector by the 5th Embodiment of this invention. FIG. 10 is an M-M ′ arrow view in FIG. 9. It is a NN 'arrow line view in FIG. FIG. 10 is a schematic cross-sectional view along the line O-O ′ in FIG. 9. It is a schematic perspective view which shows typically the conduit connector by a comparative example. It is a schematic longitudinal cross-sectional view which expands and shows the R part vicinity in FIG. It is a schematic perspective view which shows typically the use condition of the conduit cover by the 6th Embodiment of this invention, and the conduit connector cover by the 7th Embodiment of this invention. It is a schematic longitudinal cross-sectional view which expands and shows the S section vicinity in FIG.

  Hereinafter, a protective tube, a protective tube connector, a protective tube cover, and a protective tube 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 which shows the conduit 1 which is a protective tube for electric wires by the 1st Embodiment of this invention. FIG. 1B is a view taken along arrow A-A ′ in FIG. 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 includes a cylindrical member 11 that is a single member made of wood. Various electric wires (not shown) for electric power and communication are inserted through the hole 11a at the center of the cylindrical member 11. Thereby, the conduit 1 accommodates and protects an electric wire inside. The electric conduit 1 does not serve as a building material such as a pillar or a fence, but is a dedicated protective tube for accommodating and protecting various electric wires inside. This point is the same also about each electric wire pipe mentioned below.

  In the present embodiment, a convex portion 11b having an outer diameter smaller than that of the other portion is formed on the left side portion of the cylindrical member 11 in FIGS. 1 (a) and 1 (e). A concave portion 11c having an inner diameter larger than that of the other portion is formed on the right side of the cylindrical member 11 in FIGS. 1 (a) and 1 (e). The convex part 11b and the concave part 11c are formed in the dimension which mutually fits.

  In the present embodiment, the cylindrical member 11 is made of a solid material as wood, and, for example, a hole 11a is formed by hollowing out the center portion of a thinned material such as cedar and straw from which the skin has been removed with a gun drill or the like. Can be composed of solid wood. In this case, for example, the length can be about 100 cm, the outer diameter of the portion other than the convex portion 11b can be about 10 cm, and the inner diameter of the portion other than the concave portion 11c can be about 5 cm. In the case of the thinned wood, it is preferable that the core material is removed by the hole 11a if the type of the tree is a kind that distinguishes between the core material on the center side and the sapwood on the peripheral side, such as cedar and cypress. The reason for this is that when the cylindrical member 11 is subjected to a non-combustible, quasi-incombustible or flame-retardant treatment, when the wood is impregnated with a liquid flame retardant or flame retardant, the side of the cylindrical member 11 is more than the core material. Since the flame retardant and the flame retardant are more easily penetrated by the material, the flame retardant and the flame retardant are easily penetrated from the inside of the cylindrical member 11, and the non-flammability can be further improved. It is. Further, when the cylindrical member 11 has a node hole, it is preferable to bury the node hole with wood other than the node. When the cylindrical member 11 has a node, the node is removed and the node is removed. It is preferable to embed with other wood. Such an embedding process is preferably performed before the non-combustible, quasi-incombustible or flame retardant treatment.

  However, in the present invention, the wood constituting the conduit 1 is not limited to a solid material, but may be other wood-based materials. Examples of other woody materials include materials obtained by reconstituting components (for example, wood pieces, wood powder, plates, fibers, etc.) obtained from solid wood. Specific examples of the other woody materials include particle board, medium density fiberboard (MDF), plywood, laminated wood, single board laminated material (LVL), cross-laminated timber (CLT), and oriented strand board. A material such as (OSB) can be given. Specifically, examples of the other wood-based materials include materials formed by solidifying wood powder, wood fragments, wood fibers, and wood plates with resin, flame retardants, flame retardants, and the like. Can do. Parts made of wood powder, wood fragments, wood fiber or wood plate made of resin, flame retardant, flame retardant, etc. and molded are also treated with flame retardant, semi-flame retardant or flame retardant. One of the members made. These points are the same for the wood described later.

  In the present embodiment, the cylindrical member 11 is subjected to incombustibility, quasi-incombustibility, or incombustibility treatment. As this treatment, various treatments and treatment agents can be employed, for example, a treatment for impregnating a wood with a liquid incombustible agent or a flame retardant in a reduced pressure state, a flame retardant or a flame retardant etc. on the surface of the wood. The process etc. which apply | coat to can be mentioned. As the flame retardant or flame retardant, for example, a phosphoric acid-based or boric acid-based treating agent can be used. These points are the same for the treatment of incombustibility, quasi-incombustibility, or incombustibility of wood described later. In addition, although the said process may be given only to the surface (outer surface in this Embodiment) side which becomes the outer side of the conduit 1, the surface which becomes the inner side of the conduit 1 (in this embodiment, the hole 11a). It is preferable to perform the treatment on the inner surface side. In this case, when the cylindrical member 11 is impregnated with a liquid incombustible agent or a flame retardant, the impregnation may be performed after the hole 11a is formed. After infiltrating a liquid incombustible agent, a flame retardant, etc. into the cylindrical member 11, after making it dry, you may prepare the surface with a sander etc. as needed.

  Fig.2 (a) is a schematic sectional drawing which shows typically the mode before connecting the conduits 1 shown in FIG. 1 directly in a straight tube shape. FIG.2 (b) is a schematic sectional drawing which shows typically a mode after connecting the conduits 1 shown in FIG. 1 directly in a straight tube shape. 2 (a) and 2 (b) correspond to FIG. 1 (e).

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

  The thermal conductivity of wood is significantly lower than that of metal, and wood has higher heat resistance than resin. Therefore, since the conduit 1 according to the present embodiment is made of wood, it is difficult for high heat due to a fire to be transmitted to the internal wires as compared to a metal or resin conduit. For this reason, according to this Embodiment, the tolerance of the electric wire with respect to a fire can be improved, and, thereby, the time until an electric wire is disconnected or short-circuited by a fire can be extended.

  Moreover, when the electric wire itself inside the conduit 1 fails and is short-circuited, the high heat generated by the short-circuit is insulated by the conduit 1 made of wood and hardly transmitted to the outside. Therefore, even if there is an easily flammable material on the outside of the conduit 1, it does not spread out to the outside of the conduit 1, and a fire caused by a short circuit can be prevented. In addition, even if it ignites once by the wire short-circuit in the conduit 1, the oxygen in the conduit 1 will eventually disappear and the fire will be extinguished automatically.

  Furthermore, in this Embodiment, the cylindrical member 11 which is the timber which comprises the conduit 1 is processed incombustible, semi-incombustible, or incombustible. Therefore, since the said wood becomes difficult to burn, the tolerance of the electric wire with respect to a fire can be raised more, and, thereby, the time until an electric wire is disconnected or short-circuited by a fire can be extended more. However, in the present invention, the wood does not necessarily have to be subjected to a non-combustible, semi-incombustible or flame-retardant treatment.

  [Second Embodiment]

  Fig.3 (a) is a schematic sectional drawing which shows typically a mode before connecting the conduits 21 by the 2nd Embodiment of this invention directly in a straight tube shape, and respond | corresponds to Fig.2 (a) doing. FIG.3 (b) is a schematic sectional drawing which shows typically the mode after connecting the conduits 21 by the 2nd Embodiment of this invention directly to a straight tube shape, and respond | corresponds to FIG.2 (b). doing. 3A and 3B, elements that are the same as or correspond to those in FIGS. 2A and 2B are assigned the same reference numerals, and redundant descriptions thereof are omitted.

  The conduit 21 according to the present embodiment is different from the conduit 1 according to the first embodiment in that a male screw portion 11d is formed on the outer periphery of the convex portion 11b of the cylindrical member 11 and the concave portion 11c of the cylindrical member 11 is formed. The internal thread part 11e is formed in the inner periphery, and the two conduits 1 are fixed together by the male thread part 11d and the female thread part 11e being screwed together.

  Also in this embodiment, the same advantages as those in the first embodiment can be obtained.

  [Third Embodiment]

  Fig.4 (a) is a schematic front view which shows the conduit 31 by the 3rd Embodiment of this invention, and respond | corresponds to Fig.1 (a). FIG. 4B is an E-E ′ arrow view in FIG. 4A, and corresponds to FIG. FIG. 4C is an F-F ′ arrow view in FIG. 4A and corresponds to FIG. FIG. 4D is a G-G ′ arrow view in FIG. 4A, and corresponds to FIG. FIG. 4E is a view taken along the arrow line H-H ′ in FIG. 4A, and corresponds to FIG.

  The conduit 31 according to the present embodiment is made of wood, and the wood has a cylindrical shape as a whole and a plurality of structural members each having a cross-sectional shape that is a part of the entire circumference of the cylindrical cross-sectional shape. Have. Specifically, the wood constituting the conduit 31 according to the present embodiment has two cross-sectional 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 arc-shaped members having a cylindrical shape as a whole. In the present invention, the wood may have a cylindrical shape other than the cylindrical shape (for example, a square cylindrical shape). Furthermore, in the present invention, the number of the plurality of constituent members that have a cylindrical shape as a whole and each have a cross-sectional shape that 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-section arc-shaped members 11 </ b> A and 11 </ b> B are obtained by dividing almost two cylindrical members 11 in FIG. 1, and joining them together This is the same as the cylindrical member 11 in FIG. In the present embodiment, as shown in FIGS. 4B to 4D, a relatively small step is formed on the joint surface of the two cross-section arcuate members 11A and 11B. . However, such a step is not necessarily formed.

  The cylindrical shape of the cross-section arc-shaped members 11A and 11B may be held, for example, by joining the cross-section arc-shaped members 11A and 11B with an adhesive, or indicated by an arrow Y2 in FIG. The cross-section arc-shaped members 11A and 11B may be joined by screwing a wood screw (not shown) in the direction indicated by the arrow Y2 from the position. This may be performed by binding with a band (not shown) (for example, a band such as a hose band).

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

  Also in this embodiment, the same advantages as those in the first embodiment can be obtained.

  Further, in the present embodiment, the conduit 31 is composed of the two cross-section arc-shaped members 11A and 11B, so that, for example, the thinned thinning material or the like is so long that it is difficult to cut out the central portion with a gun drill or the like. Even if it divides into two, since the location corresponding to inner space 11Aa and 11Ba can be scraped off for every two split members, each conduit 31 can be constituted long.

  [Fourth Embodiment]

  FIG. 5 is a schematic plan view showing a usage state of the conduit connector 41 according to the fourth embodiment of the present invention. FIG. 6 is a view taken in the direction of arrows J-J ′ in FIG. 5. FIG. 7 is a view taken along the arrow K-K ′ in FIG. 6. FIG. 8 is a schematic sectional view taken along line L-L ′ in FIG. 5. 5 to 8, the illustration of the electric wires is omitted.

  The conduit connector 41 according to the present embodiment is a hollow conduit connector that connects a plurality of conduits 1 and is made of wood made of a solid material or other wood-based material.

  Specifically, the conduit connector 41 according to this embodiment connects the two conduits 1 shown in FIG. The conduit connector 41 according to the present embodiment is configured in a rectangular parallelepiped box shape with four side plates 42 to 45 made of wood, an upper plate 46 and a bottom plate 47. 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 with an adhesive or a wood screw to form a box shape. The side plate 42 is formed with a mounting hole 42a into which the convex portion 11b of the cylindrical member 11 of the conduit 1 is fitted. The side plate 43 orthogonal to the side plate 42 is formed with a mounting hole 43a into which the convex portion 11b of the cylindrical member 11 of the other conduit 1 is fitted. The projections 11b of the cylindrical member 11 of each conduit 1 are fitted in the mounting holes 42a and 43a, respectively, and each conduit 1 is fixed to the side plates 42 and 43 with an adhesive or the like.

  Prior to use, the 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, excluding the upper plate 46 (or the bottom plate 47), to each other. Then, only the upper plate 46 (or the bottom plate 47) is removed from the five plates as a lid. In use, the conduit connector 41 according to the present embodiment has the two conduits 1 attached to the attachment holes 42a and 43a, respectively, and an electric wire (not shown) is connected from the inside of the one conduit 1 to the conduit connector. 41 is introduced into the other conduit from there. As a result, the electric wire is bent 90 ° within the conduit connector 41. Thereafter, the upper plate 46 (or the bottom plate 47) is fixed with respect to the other five plates to be covered, and the conduit connector 41 according to the present embodiment is in use. Thus, the conduit connector 41 according to the present embodiment is used, for example, at a location where the wire is bent 90 °.

  In the present embodiment, the side plates 42 to 45, the upper plate 46, and the bottom plate 47 are subjected to incombustibility, quasi-incombustibility, or incombustibility treatment. The treatment may be performed only on the outer side surfaces of the side plates 42 to 45, the upper plate 46 and the bottom plate 47, but the treatment is also performed on the inner side surfaces of the side plates 42 to 45, the upper plate 46 and the bottom plate 47. Is preferred.

  Since the conduit connector 41 according to the present embodiment is made of wood, it is difficult for high heat due to a fire to be transmitted to the internal wires as compared to a metal or resin conduit connector. Therefore, according to this Embodiment, the tolerance of the electric wire with respect to a fire can be improved, and, thereby, the time until an electric wire is disconnected or short-circuited by a fire can be extended.

  Moreover, according to this Embodiment, the side plates 42-45 which are the timbers which comprise the conduit connector 41, the upper board 46, and the bottom board 47 are processed incombustible, semi-incombustible, or incombustible. Yes. Therefore, since the said wood becomes difficult to burn, the tolerance of the electric wire with respect to a fire can be raised more, and, thereby, the time until an electric wire is disconnected or short-circuited by a fire can be extended more. However, in the present invention, the wood does not necessarily have to be subjected to a non-combustible, semi-incombustible or flame-retardant treatment.

  In addition, in this Embodiment, it may replace with the conduit 1 shown in FIG. 1, and may deform | transform so that the conduit 21 shown in FIG. 3 may be connected. In this case, a female screw portion into which the male screw portion 11d formed on the convex portion 11b of the conduit tube 21 is screwed is formed in the attachment holes 42a and 43a. Each conduit 21 can be fixed to the side plates 42 and 43 by screwing the male thread 11d of the convex portion 11b of each conduit 21 into the female thread of the mounting holes 42a and 43a.

  [Fifth Embodiment]

  FIG. 9 is a schematic plan view showing a usage state of the conduit connector 51 according to the fifth embodiment of the present invention. FIG. 10 is a view taken along the line M-M ′ in FIG. 9. FIG. 11 is an N-N ′ arrow view in FIG. 10. FIG. 12 is a schematic cross-sectional view along the line O-O ′ in FIG. 9. A schematic cross-sectional view along the line P-P ′ in FIG. 9 and a schematic cross-sectional view along the line Q-Q ′ in FIG. 9 are the same as those in FIG. 12. In addition, in FIG. 9 thru | or FIG. 12, illustration of an electric wire is abbreviate | omitted.

  The conduit connector 51 according to the present embodiment is also a hollow conduit connector that connects the plurality of conduits 1 and is made of wood made of a solid material or other wood-based material.

  Specifically, the conduit connector 51 according to the present embodiment connects the six conduits 1 shown in FIG. The conduit connector 51 according to the present embodiment is formed in a regular hexagonal columnar box shape with six side plates 52 to 57 made of wood, an upper plate 58 and a bottom plate 59. Although not shown in the drawings, the side plates 52 to 57, the upper plate 58, and the bottom plate 59 are fixed to each other with an adhesive or a wood screw to form a box shape. Mounting holes 52a, 53a, 54a, 55a, 56a, and 57a into which the convex portions 11b of the cylindrical member 11 of the conduit 1 are fitted are formed in the side plates 52 to 57, respectively. The projections 11b of the cylindrical member 11 of each conduit 1 are fitted into the mounting holes 52a, 53a, 54a, 55a, 56a, 57a, respectively, and each conduit 1 is attached to the side plates 52 to 57 by an adhesive or the like. It is fixed.

  Prior to use, the conduit connector 51 according to the present embodiment fixes seven plates out of the side plates 52 to 57, the upper plate 58 and the bottom plate 59, excluding the upper plate 58 (or the bottom plate 59). Then, only the upper plate 58 (or the bottom plate 59) is removed from the seven plates with the lid. When the conduit connector 51 according to the present embodiment is used, the six conduits 1 are respectively attached to the mounting holes 52a, 53a, 54a, 55a, 56a, 57a, and five wires are connected from the inside of the one conduit 1. (Not shown) is led out into the conduit connector 51, and the five wires are introduced into the other five conduits 1 one by one. As a result, the five wires led out from one conduit 1 into the conduit connector 51 are branched into the five conduits 1, respectively. Thereafter, the upper plate 58 (or the bottom plate 59) is fixed with respect to the other seven plates to be covered, and the conduit connector 51 according to the present embodiment is in use. Thus, the conduit connector 51 according to the present embodiment is used, for example, at a location where an electric wire is branched.

  In the present embodiment, the side plates 52 to 57, the upper plate 58, and the bottom plate 59 are subjected to incombustibility, semi-incombustibility, or incombustibility treatment. The treatment may be performed only on the outer side surfaces of the side plates 52 to 57, the upper plate 58 and the bottom plate 59, but the treatment is also performed on the inner side surfaces 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, it is difficult for high heat due to a fire to be transmitted to the internal electrical wire as compared to a metal or resin conduit connector. Therefore, according to this Embodiment, the tolerance of the electric wire with respect to a fire can be improved, and, thereby, the time until an electric wire is disconnected or short-circuited by a fire can be extended.

  Moreover, according to this Embodiment, the side plates 52-57 which are the timbers which comprise the conduit connector 51, the upper board 58, and the bottom board 59 are processed incombustible, semi-incombustible, or incombustible. Yes. Therefore, since the said wood becomes difficult to burn, the tolerance of the electric wire with respect to a fire can be raised more, and, thereby, the time until an electric wire is disconnected or short-circuited by a fire can be extended more. However, in the present invention, the wood does not necessarily have to be subjected to a non-combustible, semi-incombustible or flame-retardant treatment.

  In addition, in this Embodiment, it may replace with the conduit 1 shown in FIG. 1, and may deform | transform so that the conduit 21 shown in FIG. 3 may be connected. In this case, in the mounting holes 52a, 53a, 54a, 55a, 56a, and 57a, female screw portions to which the male screw portions 11d formed on the convex portions 11b of the conduit tube 21 are screwed are formed. Each conduit 21 can be fixed to the side plates 52-57 by screwing the male thread 11d of the convex portion 11b of each conduit 21 into the female thread of the mounting holes 52a, 53a, 54a, 55a, 56a, 57a. it can.

  Further, in the present embodiment, for example, the side plates 53, 55, and 57 are not formed with the attachment holes 53a, 55a, and 57a, and the side plates 53, 55, and 57 are modified so that the conduit 1 is not attached. Also good. In this case, for example, two electric wires led out from one electric conduit 1 into the electric conduit connector 51 can be used for branching to the other two electric conduits 1, respectively.

  Further, in the present embodiment, for example, it may be configured to have a regular quadrangular prism shape or a regular pentagonal column shape, and a modification may be made so that attachment holes are provided in each side plate and the conduit 1 is fixed thereto.

  [Comparative example]

  FIG. 13: is a schematic perspective view which shows typically the conduit connector 61 by the comparative example compared with the conduit connector 41 by the 4th Embodiment of this invention mentioned above. FIG. 14 is an enlarged schematic vertical sectional view showing the vicinity of the R portion in FIG. In FIG. 14, a conduit 71 according to a comparative example compared with the conduit 1 according to the first embodiment of the present invention is also shown in phantom lines.

  The conduit connector 61 according to this comparative example has a rectangular parallelepiped box-shaped metal main body 62 and two metal connection tubes 63 for connecting the conduits. 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 connector 61 according to this comparative example is used, for example, at a location where the wire is bent by 90 °, similarly to the conduit connector 41 according to the above-described fourth embodiment of the present invention.

The tube stopper 64 is provided with a screw at its tip, and is used for fixing the conduit 71 by screwing into the screw hole of the connection tube 63. After the screwing, the head is further twisted strongly. And used to be threaded at the narrow neck 64a. It is provided so that it can be confirmed that the fixing of the conduit 71 is completed by confirming that there is no head from a remote position. Note that when the screw is engraved inside the connecting pipe 63 and the conduit 71 is screwed into the 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 internal wire, and the wire is disconnected or short-circuited in a short time.

  Moreover, since the conduit connector 61 according to this comparative example is made of metal, a fire is applied to the electric wire guided into the conduit connector via the conduit connected to the conduit connector. High heat is transmitted from the outside of the conduit connector in a short time, and the electric wire is also disconnected or short-circuited in a short time at a location in the conduit connector.

  [Sixth and seventh embodiments]

  FIG. 15: is a schematic perspective view which shows typically the use condition of the conduit cover 81 by the 6th Embodiment of this invention, and the conduit connector cover 91 by the 7th Embodiment of this invention. FIG. 16 is a schematic longitudinal sectional view showing the vicinity of the S portion in FIG. 15 in an enlarged manner.

  A conduit cover 81 according to the sixth embodiment of the present invention is a conduit cover that covers the metal conduit 71 according to the comparative example, and is made of wood made of a solid material or other wood-based material. Is. Since the conduit cover 81 according to the present embodiment is configured in the same manner as the conduit 31 shown in FIG. 4, detailed description thereof is omitted. However, the conduit cover 81 according to the present embodiment has dimensions and the like so as to cover the conduit 71.

  The conduit connector cover 91 according to the seventh aspect of the present invention is a conduit connector cover covering the metal conduit connector 61 according to the comparative example, and is made of solid wood or other wood-based material. It is composed of Since the conduit connector cover 91 according to the present embodiment is configured in the same manner as the conduit connector 41 shown in FIGS. 5 to 8, the detailed description thereof is omitted. However, the conduit connector cover 91 according to the present embodiment has dimensions and the like 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 high heat due to fire to be transmitted to the internal conduit 71, and consequently high heat due to fire is reduced. It becomes difficult to be transmitted to the internal electric wire. Therefore, according to the present embodiment, despite the use of the metal conduit 71, the resistance of the electric wire to the fire can be increased, whereby the electric wire is disconnected or short-circuited by the fire. Can be extended.

  Further, since the conduit connector cover 91 according to the seventh embodiment of the present invention is made of wood and covers the metal conduit connector 61, high heat due to a fire is not easily transmitted to the internal conduit connector 61. As a result, high heat from a fire is hardly transmitted to the internal electric wires. Therefore, according to the present embodiment, it is possible to increase the resistance of the electric wire against fire in spite of the fact that a metal conduit connector is used, thereby causing the electric wire to be disconnected or short-circuited by the fire. The time until it ends can be extended.

  The conduit cover 81 according to the present embodiment may cover a resin conduit instead of the metal conduit 71. The conduit connector cover 91 according to the present embodiment may cover the resin conduit connector in place of the metal conduit connector 61.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments.

  For example, in the above-described embodiment, the conduit and the conduit cover are configured to have a cylindrical shape, but the conduit and the conduit cover are other cylindrical shapes (for example, a rectangular cylindrical shape). You may comprise so that.

  In the above-described embodiment, the electric pipe is configured as a straight pipe extending in a straight line. However, the electric pipe is configured as a bent pipe that bends gently at a predetermined curvature (for example, 90 °). Also good. Such a bent pipe can be manufactured, for example, by solidifying and molding wood powder with a resin, a flame retardant, a flame retardant, or the like.

  Furthermore, although embodiment mentioned above was an example of a conduit tube, a conduit connector, a conduit cover, and a conduit connector cover, this invention accommodates inside, for example in embodiment mentioned above. A light guide line tube (protection tube for light guide line) and a plurality of light guide line tubes are connected, in which the object to be protected is various light guide lines (including optical fibers) for energy transmission and communication instead of electric wires. The present invention can also be applied to a hollow light guide tube connector, a light guide tube cover that covers the light guide tube, and a light guide tube connector cover that covers the light guide tube connector.

1,21,31 Conduit (protection tube)
41, 51 Conduit connection (protection tube connection)
81 Conduit cover (protection tube cover)
91 Conduit tube connector cover (Protective tube connector cover)

Claims (10)

  A protective tube for an electric wire or a light guide wire, characterized in that it is made of solid wood or other wood-based wood.   2. The protective tube according to claim 1, wherein the wood has a plurality of constituent members each having a cross-sectional shape that forms a cylindrical shape as a whole and each part of the entire circumference of the cylindrical cross-sectional shape.   The protective tube according to claim 1 or 2, wherein the wood has been subjected to a treatment of incombustibility, semi-incombustibility or incombustibility.   A protective tube connector for connecting a plurality of protective tubes for electric wires or light guide wires, wherein the protective tube connector is made of wood made of a solid material or other woody material.   The protective pipe connector according to claim 4, wherein the wood has been subjected to incombustibility, quasi-incombustibility, or incombustibility treatment.   A protective tube cover for covering a protective tube made of metal or resin for an electric wire or a light guide wire, wherein the protective tube cover is made of wood made of a solid material or other woody material.   The protective tube cover according to claim 6, wherein the wood has a plurality of structural members each having a cross-sectional shape that forms a cylindrical shape as a whole and each part of the entire circumference of the cylindrical cross-sectional shape. .   The protective tube cover according to claim 6 or 7, wherein the wood has been subjected to a treatment of incombustibility, semi-incombustibility or incombustibility.   A protective tube connector cover that covers a metal or resin hollow protective tube connector that connects a plurality of protective tubes for electric wires or light guide wires, and is made of solid wood or other wood-based material. A protective tube connector cover characterized by being constructed.   The protective pipe connector cover according to claim 9, wherein the wood is subjected to incombustibility, quasi-incombustibility, or incombustibility treatment.

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