JP2018196218A - Joint box and construction method of the same - Google Patents

Abstract

To provide a joint box for achieving both of sealing performance and easiness in construction and a construction method using the joint box.SOLUTION: A joint box 10 houses connection wire parts Bab1 to Bab3 and Bcd1 to Bcd3 in which each end of a plurality of cables Ca to Cd is connected, and protects them while insulating. The joint box includes: a body part 40 constituted in a cylindrical shape; a first lid part (a bottom lid part 60) partially having open regions (cable conductive holes 64a to 64d) to which each of the cables Ca to Cd can be inserted in one end of an axial direction of the body part 40; and a second lid part (a bottom lid part 20) including a close surface for closing the other end of the axial direction on a side opposite to one end side of the axial direction of the body part 40, and is constituted as a separate body connectable to the body part 40.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a joint box that houses and protects a connection portion in which ends of a plurality of cables are connected, and a construction method thereof.

  When connecting cables, it is necessary to prevent leakage from the connected part. Thus, joint boxes have been used for indoor and outdoor electrical wiring (for example, Patent Document 1). Here, the cable and the cable are connected by the connection connector, and the connected portion is defined as a connection portion. The joint box of Patent Document 1 houses a plurality of connection portions therein, and insulates and protects the plurality of connection portions. Further, the joint box of Patent Document 1 has an opening through which the cable is inserted on the lower surface.

JP 2005-328699 A

  However, since the joint box of Patent Document 1 has an opening on the lower surface, there is a possibility that water or the like may enter the inside of the joint box from the opening when used outdoors. Therefore, it has been performed to seal the inside of the joint box by filling the inside of the joint box of Patent Document 1 with a curable resin. Since the connection part accommodated in the inside of a joint box is covered with curable resin, there is no possibility that water will enter the connection part.

  In order to fill the inside of the joint box of Patent Document 1 with a curable resin, first, the joint box is held with the opening through which the cable is inserted facing upward. Next, a method has been adopted in which a curable resin is poured into the joint box through the opening while being held, and the joint box is held until the curable resin is cured. In this method, if the joint box is installed on the wall surface before the curable resin is cured, the opening of the joint box faces downward before the curable resin is cured. There is a risk of spilling out of the box. For this reason, the joint box of patent document 1 needs to hold | maintain a joint box until curable resin hardens | cures, and the joint box which can be sealed more easily was calculated | required.

  The present invention has been made in view of the above points, and the problem to be solved by the present invention is a joint box that achieves both sealing performance and ease of construction, and a construction method using the joint box. Is to provide.

  According to one aspect of the present invention, the joint box is a joint box that houses and protects a connection portion in which ends of a plurality of cables are connected. The joint box has a cylindrical body part, a first lid part having an opening region through which the cable can be inserted at one axial end of the body part, and the axial direction of the body part. And a second lid portion that has a closed surface that closes the other end in the axial direction opposite to the one end side, and has a separate structure that can be connected to the body portion.

  Therefore, the joint box has a body part, a first lid part at one axial end of the body part, and a second lid part on the opposite side of the body part from the first lid part side. The first lid part has in part an opening region through which the cable can be inserted. The cable is inserted from the opening region of the first lid portion, and the tip of the cable is accommodated in the internal space of the trunk portion. The end of the cable accommodated in the internal space of the body part is connected, and this connected part is defined as a connection part. And the internal space of a trunk | drum part accommodates a connection part. The body portion is closed at the end on the second lid portion side by the second lid portion having a closing surface. The internal space of the body portion is closed on the second lid portion side by the second lid portion, but the first lid portion side is opened in an opening region provided in the first lid portion.

  In a conventional joint box, a portion corresponding to the second lid portion and a portion corresponding to the body portion are integrally formed, and the portion corresponding to the first lid portion is not provided. And in the conventional joint box, although the site | part side corresponded to a 2nd cover part is closed, the site | part corresponded to a 1st cover part is opening. Sealing this opening is difficult because of the large opening area.

  On the other hand, in the joint box having the above-described features, as described above, the body portion opens in the opening region that the first lid portion has in part. Since this opening area is a part of the first lid, the opening area is smaller than that of the conventional joint box. Further, the cable is inserted into the opening area of the first lid, so that the opening area of the opening area is further reduced, and the sealing performance of the first lid, and thus the sealing performance of the body, is the same as that of the conventional joint. Can be higher than the box. As described above, the joint box can improve the sealing performance by including the first lid part having an opening region through which the cable can be inserted.

  In addition, the second lid portion has a separate structure that can be connected to the body portion. Therefore, construction can be performed with the second lid part removed from the body part, and construction of the joint box can be facilitated by removing the second lid part from the body part.

  Next, according to another feature, the second lid portion is preferably connectable by screwing with the body portion. Therefore, since the second lid part can be connected and detached by screwing with the body part, the connection and removal from the body part can be further facilitated.

  Next, according to another feature, it is preferable that the body portion and the first lid portion are separately configured to be connectable by screwing. Therefore, the construction can be performed with the first lid part removed from the trunk part, and the joint box can be constructed more easily by removing the first lid part from the trunk part.

  Next, according to another feature, it is preferable that a peripheral edge of the first lid portion has a peripheral wall portion on a side opposite to the body portion side. Accordingly, the opening region of the first lid portion is surrounded by the peripheral wall portion. For this reason, it can prevent by a surrounding wall part that foreign materials, such as the scattered water, enter into the internal space of a trunk | drum from an opening area | region. That is, the peripheral wall portion can prevent foreign matters such as scattered water from entering the internal space of the body portion.

  Next, according to another feature, it is preferable that the first lid portion has a rod-like portion extending in the axial direction of the body portion. Therefore, the rod-like portion can be bundled together with the cable. For example, the rod-shaped portion and the cable can be easily bundled using a binding band.

  Next, according to another feature, the body portion preferably includes a partition plate that divides the internal space into a plurality of sections. Therefore, the partition plate can further improve the insulation between the separated connection parts by separating the connection parts into sections.

  In addition, the joint box construction method in the present invention is a joint box construction method for accommodating and protecting a connection portion where the ends of a plurality of cables are connected, and the joint box is configured in a cylindrical shape. A body part, a first lid part having an opening region through which the cable can be inserted at one end in the axial direction of the body part, and the other axial direction opposite to the one end side in the axial direction of the body part A second lid portion having a closed surface that closes the end and configured to be separated from the body portion, and (a) the first ends of the cables are connected to the first lid. A cable insertion step for inserting into the opening region of the portion; (b) a connection step for forming the connection portion in which the ends of the cables are connected by connecting the ends of the plurality of cables; Connection part A body portion housing step for housing in the internal space of the recording body portion; (d) a first lid portion sealing step for sealing the opening region of the first lid portion with a sealing material; and (e) the second lid. It is the construction method of the joint box including the 2nd cover part attachment process which connects a part to the said trunk | drum part.

  As described above, the internal space of the body portion before construction is closed by the second lid portion having a closed surface on the second lid portion side, and the opening of the first lid portion on the first lid portion side. Open in the area. According to this construction method, (d) the first lid portion is sealed with the sealing material in the first lid portion sealing step. Since the second lid portion side of the trunk portion is closed and the first lid portion side of the trunk portion is also sealed, the internal space of the trunk portion can be sealed. And the internal space of the trunk | drum, ie, the internal space of a joint box, has accommodated the connection part by the (c) trunk | drum part accommodation process. Accordingly, since the connection portion is accommodated in the sealed internal space of the joint box, the connection portion can be further insulated and protected with higher insulation.

  Next, according to another feature, in the joint box construction method, further, (d) after the first lid sealing step, (f) curable resin is applied from the other axial end of the body portion. It is preferable that the method is a joint box construction method including a curable resin sealing step of sealing the internal space of the body portion by pouring. Therefore, according to this construction method, the connection portion can be further sealed with the curable resin. Since the connection part is sealed with the curable resin, the insulation is further improved and the insulation is protected.

  The present invention can provide a joint box that achieves both sealability and ease of construction and a construction method using the joint box by having the configuration of each invention described above.

It is a perspective view of the joint box of an embodiment. It is an exploded view of the joint box of an embodiment. It is a perspective sectional view after construction of a joint box of an embodiment. It is a connection diagram of the cable connected within the joint box of the embodiment. It is a schematic diagram of the state which divided and isolated the some connection part accommodated in the joint box of embodiment by a partition plate. It is the schematic diagram of the construction method of the joint box of embodiment, (A) is the schematic diagram of the cable and construction connector before construction, (B) is the schematic diagram after inserting the cable in the bottom part of a bottom cover part, ( (C) is a schematic view after the cable is connected, (D) is a schematic view in a state where the body part 40 is further attached, and (E) is a case where the bottom face part 61 of the bottom cover part 60 is sealed with the sealing material F. (F) is a schematic diagram in a state where a curable resin is injected into the internal space of the body portion, and (G) is a schematic diagram in a state where an upper lid portion is further attached. In embodiment, it is sectional drawing of the bottom cover part sealed by the sealing material in the state upside down. It is a perspective sectional view after construction of a joint box of modification 1. It is explanatory drawing of the cable introduction hole provided in the bottom face part of a bottom cover part, (A) is a bottom view of the bottom cover part of embodiment, (B) is the same figure of the modification 2, (C) is (D) is the same figure of the modification 4, (E) is the same figure of the modification 5, (F) is the same figure of the modification 6, (G) ) Is a similar diagram of the modified example 7, (H) is a similar diagram of the modified example 8, and (I) is a similar diagram of the modified example 9. FIG. It is sectional drawing of the trunk | drum part of the state which hold | maintained the partition plate, (A) is sectional drawing of the trunk | drum part of embodiment, (B) is a figure similar about the modification 10. FIG. It is sectional drawing of the trunk | drum part of the state which hold | maintained the partition plate about the modification 11. FIG. It is sectional drawing of the trunk | drum part of the state which hold | maintained the partition plate about the modification 12. FIG. It is explanatory drawing explaining the modification 13, (A) is a schematic diagram of the state which isolate | separated and separated the several connection part accommodated in the joint box of the modification 13 with a partition plate, (B) is a partition plate. (C) is a cable connection diagram, (D) is a connection diagram of (C), and the connection portion is separated and separated by the partition plate of the modified example 13 It is a schematic diagram of a state. It is explanatory drawing of the cable support part of the modification 14, (A) is a schematic diagram of the state with which the cable support part and cable of embodiment are bundled, (B) is the same schematic diagram of the modification 14. . It is an exploded view of the joint box of the modification 15.

[Embodiment]
Hereinafter, an embodiment for carrying out the present invention will be described with reference to FIGS. The joint box 10 of the present embodiment is a joint box 10 that connects cables and cables using a connection connector and accommodates the connected portions. The material which comprises the joint box 10 of this embodiment selected the polypropylene resin. The material which comprises the joint box 10 should just be a material excellent in insulation, and is not restricted to a polypropylene resin. For example, polycarbonate resin, acrylic resin, polyacetal resin, ABS resin, polyethylene resin, polystyrene resin, or polyethylene terephthalate resin can be selected.

<About the structure of the joint box 10>
FIG. 1 shows a perspective view of the joint box 10 of the present embodiment. As shown in FIG. 1, the joint box 10 has an upper lid portion 20, a body portion 40, and a bottom lid portion 60. Although the details will be described later, the cable is inserted into the joint box 10 from the bottom lid portion 60. The cable is connected at the end by a connection connector. Here, a portion where the cables are connected is defined as a connection portion. The internal space of the body part 40 accommodates the connection part, and further seals the internal space of the body part. When the connection portion is accommodated in the internal space of the joint box 10 in this way, the joint box 10 is installed indoors and outdoors.

  As shown in FIG. 1, the upper lid portion 20 has a box installation portion 21 on the upper surface. Moreover, the trunk | drum 40 has the box installation part 41 in an outer peripheral surface. And both the box installation part 21 and the box installation part 41 have an opening. The joint box 10 can be installed on the wall surface of a building using the box installation unit 21 and the box installation unit 41.

  Further, the joint box 10 is configured to be connectable by screwing the bottom lid portion 60 and the upper lid portion 20 together with the body portion 40 in order to facilitate construction. FIG. 2 shows an exploded view of the joint box 10. As shown in FIG. 2, the joint box 10 includes an upper lid portion 20, a cylindrical body portion 40, a bottom lid portion 60, and a partition plate 80.

  As shown in FIG. 2, the upper lid portion 20 extends downward from the outer periphery of the disc-shaped closing surface portion 22, the above-described box installation portion 21 provided on the upper surface of the closing surface portion 22, and the closing surface portion 22. And a peripheral wall portion 23. The peripheral wall portion 23 has a female screw portion 24 in which a female screw is formed on the inner peripheral surface. The upper lid portion 20 can be screwed to the body portion 40 with the female screw portion 24.

  The trunk | drum 40 is comprised by the cylindrical shape, as FIG. 2 shows. The body 40 includes the above-described box installation portion 41 on the outer peripheral surface, a male screw portion 42 in which a male screw is formed on the upper side of the outer peripheral surface, a male screw portion 43 in which a male screw is formed on the lower side of the outer peripheral surface, and an inner peripheral surface. Two partition plate introduction grooves 44a and 44b are provided on the upper side of the first plate. The male screw portion 42 provided on the upper outer peripheral surface of the body portion 40 can be screwed with the female screw portion 24 of the upper lid portion 20. Moreover, the trunk | drum 40 can be screwed together with the bottom cover part 60 with the external thread part 43 which has an outer peripheral surface below.

  As shown in FIG. 2, two partition plate introduction grooves 44 a and 44 b are provided on the upper side of the body portion 40 at positions facing each other on the inner peripheral surface. The widths of the partition plate introduction grooves 44 a and 44 b are both larger than the thickness of the side surface of the partition plate 80. For this reason, the partition plate 80 can be fitted into the partition plate introduction grooves 44 a and 44 b, and the partition plate 80 can be held in the internal space of the body portion 40 by fitting. When the partition plate 80 is held in the internal space of the body portion 40, the upper side of the internal space of the body portion 40 is divided into two sections.

  As shown in FIG. 2, the bottom cover portion 60 includes a bottom surface portion 61 and a peripheral wall portion 62 that extends vertically from the outer periphery of the bottom surface portion 61. The bottom surface portion 61 is provided with cable introduction holes 64a to 64d through which cables can be inserted. The shape of the cable introduction holes 64a to 64d is the same as the cross-sectional shape of the inserted cable. That is, when the round cable is inserted, the cable introduction holes 64a to 64d are formed into a circular shape, and when the flat cable is inserted, the cable introduction holes 64a to 64d are formed into an oval shape. In the present embodiment, the cables Ca to Cd accommodated in the joint box 10 are, for example, flat cables having an oval cross section, and the cable introduction holes 64a to 64d are formed in an oval shape. . Further, the bottom surface portion 61 is provided with a rod-like cable support portion 65 having a circular cross section extending downward from the center of the lower surface.

The peripheral wall portion 62 is provided with a female screw portion 63 in which a female screw is formed on the inner wall surface of the portion above the bottom surface portion 61. The internal threaded portion 63 of the bottom cover portion 60 and the externally threaded portion 43 provided on the lower side of the body portion 40 can be screwed together. The configuration of the joint box 10 has been described above.

  In addition, the bottom cover part 60 in this embodiment corresponds to the “first cover part” of the present invention. Similarly, the upper lid portion 20 corresponds to the “second lid portion” of the present invention, the cable introduction holes 64 a to 64 d correspond to the “opening region” of the present invention, and in the peripheral wall portion 62 of the bottom lid portion 60. The portion below the bottom surface portion 61 corresponds to the “peripheral wall portion” of the present invention, and the cable support portion 65 corresponds to the “bar-shaped portion” of the present invention.

<About the structure of the joint box 10 after construction>
FIG. 3 shows a perspective sectional view of the joint box 10 after construction. As shown in FIG. 3, the body portion 40 of the joint box 10 is screwed into the upper lid portion 20 and the bottom lid portion 60. For this reason, the upper surface of the cylindrical body portion 40 is closed by the upper lid portion 20, and the lower surface is covered by the bottom lid portion 60. In addition, in FIG. 3, the box installation part 41 which the trunk | drum 40 has was abbreviate | omitted illustration.

  In the joint box 10, the cables Ca to Cd are inserted into the cable introduction holes 64 a to 64 d of the bottom surface part 61 provided in the bottom cover part 60. However, since FIG. 3 is a perspective sectional view, the cable introduction holes 64c and 64d and the cables Cc and Cd are not shown in FIG. Further, the cables Ca to Cd are bound together by a binding band T together with a cable support portion 65 that extends downward from the bottom surface portion 61 of the bottom lid portion 60.

  As the cables Ca to Cd, a three-core flat cable was selected as an example. A three-core flat cable is generally provided with three core wires each including a conductor (conductor) and an insulator (cover) covering the conductor, and a sheath surrounding the side-by-side core wires. ing. Further, in a three-core cable such as a three-core flat cable or a three-core round cable, the colors of the insulators of the three core wires are different. For example, a three-core cable includes a black core wire with an insulator, a white core wire with an insulator, and a red core wire with an insulator. In this way, the three core wires of the three-core cable can be distinguished by the color of the insulator. The ends of the cables Ca to Cd are stripped of the sheath and the insulator (cover) of the three core wires, and are connected by inserting a bare conductor (conductor) into the connection connector. In general, the cable means an electric wire in which one or more core wires are covered with a sheath, but in the present invention, the cable includes the core wires.

  FIG. 4 shows a connection diagram of the cables Ca to Cd. As shown in FIG. 4, the cable Ca and the cable Cb are connected, and the cable Cc and the cable Cd are connected. As described above, the cables Ca to Cd are three-core flat cables, each having three core wires. That is, the cable Ca includes three cores Ca1 to Ca3, the cable Cb includes three cores Cb1 to Cb3, and the cable Cc includes three cores Cc1 to Cc3. The cable Cd includes three core wires Cd1 to Cd3. Here, the core wire Ca1, the core wire Cb1, the core wire Cc1, and the core wire Cd1 have the same color of the insulator (cover) (for example, all black). Similarly, the cores Ca2, Cb2, Cc2, and Cd2 have the same insulator color (for example, all white), and the core Ca3, the core Cb3, The color of the insulator is the same color (for example, all red) in the line Cc3 and the core line Cd3.

  As shown in FIG. 4, the core wire and the core wire are connected within a connection connector indicated by a dotted line in the drawing. For example, FIG. 4 shows that the core wire Ca1 and the core wire Cb1 are connected by the connection connector Jab1, but the core wire Ca1 and the core wire Cb1 are connected as shown in FIG. When inserted into the connector Jab1, the conductor (conducting wire) of the core wire Ca1 and the conductor of the core wire Cb1 are conducted in the connection connector Jab1. Thus, the core wire Ca1 and the core wire Cb1 are connected within the connection connector Jab1. Here, the connection connector Jab1, the distal end portion of the core wire Ca1 inserted into the connection connector Jab1, and the distal end portion of the core wire Cb1 inserted into the connection connector Jab1 are collectively referred to as a connection portion Bab1. Similarly, the connection portion Jab2, the tip portion of the core wire Ca2 inserted into the connection connector Jab2, and the tip portion of the core wire Cb2 inserted into the connection connector Jab2 are collectively referred to as a connection portion Bab2. The same applies to the connection part Bab3 that connects the core line Ca3 and the core line Cb3. Although not shown in FIG. 3, similarly, the cores Cc1 to Cc3 of the cable Cc and the cores Cd1 to Cd3 of the cable Cd are connected by connection connectors Jcd1 to Jcd3.

  Note that the connection connectors Jab1 to Jab3 and Jcd1 to Jcd3 are used for connecting the cables Ca to Cd, but the connection connectors are not necessarily used. For example, the core wire may be connected using a sleeve. When connecting using a sleeve, the sleeve and the tip portions of a plurality of core wires connected by the sleeve are combined to form a connection portion. Of course, a connection part using a connection connector and a connection part using a sleeve may be used in combination.

  As shown in FIG. 3, the internal space of the body portion 40 is partially divided into two sections by a partition plate 80 indicated by a two-dot chain line in the drawing. As schematically shown in FIG. 5, the connection parts Bab1 to Bab3 and the connection parts Bcd1 to Bcd3 are separately accommodated in these two sections. FIG. 3 shows that the connection parts Bab1 to Bab3 are accommodated in one section. These connection parts are separated from connection parts Bcd1 to Bcd3 (not shown) by a partition plate 80.

  Here, as shown in FIG. 4, the connection parts Bab1 to Bab3 connect the cable Ca and the cable Cb, and the connection parts Bcd1 to Bcd3 connect the cable Cc and the cable Cd. As shown in FIG. 3 and FIG. 5, the partition plate 80 includes connection portions Bab1 to Bab3 that connect the cables Ca and Cb and connection portions Bcd1 to Bcd3 that connect the cables Cc and Cd. , Isolate into compartments. In this way, the partition plate 80 isolates the connection portions Bab1 to Bab3 for connecting the cable Ca and the cable Cb and the connection portions Bcd1 to Bcd3 for connecting the cable Cc and the cable Cd. The sex can be further enhanced.

  Further, as shown in FIG. 3, the bottom surface of the bottom surface portion 61 of the bottom lid portion 60 is covered with a sealing material F such as putty or resin adhesive having low fluidity, and the cable introduction hole 64a. ˜64d is sealed with a sealing material F. The inner space of the body portion 40 is sealed by the lower surface being closed by the bottom lid portion 60 and the upper surface being closed by the upper lid portion 20 in this manner. Moreover, the internal space of the trunk | drum 40 accommodates connection part Bab1-Bab3, Bcd1-Bcd3. Therefore, the joint box 10 insulates and protects the connection portions Bab1 to Bab3 and Bcd1 to Bcd3 in the sealed internal space. Thus, the joint box 10 of this embodiment seals the space which accommodates a connection part, and improves insulation more and insulates and protects connection part Bab1-Bab3, Bcd1-Bcd3.

  Further, the internal space of the body portion 40 is filled with a curable resin R (not shown), and the insulation of the connection portion is further enhanced by the filled curable resin R. As mentioned above, although the joint box 10 of this embodiment has improved the insulation of the connection part, construction is easy by having the structure mentioned above.

<Construction method of joint box 10>
6A to 6G schematically show a method for constructing the joint box 10. 6A to 6G, illustration of the connection connectors Jcd1 to Jcd3 for connecting the cable Cc and the cable Cd, the cable Cc and the cable Cd, the box installation portion 41, and the partition plate 80 is omitted.

<1, cable insertion process (a)>
As shown in FIG. 6 (A), the cables Ca to Cd (the cables Cc and Cd are not shown) are separated from the sheath of the tip and the insulator (cover) of the core wire, Bare the conductor. Further, the joint box 10 (see FIG. 2) removes the bottom cover part 60 from the body part 40. And cable Ca-Cd is penetrated from the cable introduction hole 64a-64d (refer FIG. 2) of the bottom cover part 60 (refer FIG. 6 (B), cable insertion process). Here, the cables Ca to Cd are inserted while holding the bottom cover part 60, but the bottom cover part 60 can be easily held by holding the peripheral wall part 62 of the bottom cover part 60. In other words, the peripheral wall portion 62 makes it easier to hold the bottom lid portion 60. Before the cables Ca to Cd are inserted, the bottom cover 60 is removed from the body 40, but instead of removing the body 40, the top cover 20 is removed from the body 40, and the body 40 and the bottom cover are removed. The cable Ca to Cd may be inserted and the subsequent steps may be performed in a state where the unit 60 is connected.

<2, connection process (b)>
Next, the cables Ca to Cd are connected by inserting the ends of the cores of the cables Ca to Cd into the connection connectors Jab1 to Jab3 and Jcd1 to Jcd3 (connection process). Since the connection connectors Jab1 to Jab3 and Jcd1 to Jcd3 are designed to conduct between the conductors of the inserted core wires, they can be connected by inserting the tips of the plurality of core wires into the connection connectors. As described above, the tip portions of the plurality of cables inserted into the respective connection connectors and the connection connectors are combined to form a connection portion. Here, since the body part 40 and the bottom cover part 60 are configured separately, connection can be easily performed. That is, since the connection is performed with the body portion 40 and the bottom lid portion 60 removed, the body portion 40 does not exist around the end portions of the cores of the cables Ca to Cd. Therefore, since the trunk | drum 40 does not become an obstruction | occlusion of an operation | work, it can connect easily.

<3, trunk part accommodation process (c)>
Next, the body part 40 is connected to the bottom cover part 60 (see FIG. 6D), and the partition plate 80 (not shown in FIGS. 6D to 6G) and the upper cover part 20 are connected to the body. By attaching to the part, the connection parts Bab1 to Bab3 and Bcd1 to Bcd3 are housed in the internal space of the bottom cover part 60 (body part housing step). Here, the partition plate 80 is attached between the connection parts Bab1 to Bab3 where the cable Ca and the cable Cb are connected and the connection parts Bcd1 to Bcd3 where the cable Cc and the cable Cd are connected (FIG. 5). And FIG. 3 (except for cables Cc and Cd). That is, between the connection parts Bab1 to Bab3 (see FIG. 4) for connecting the cable Ca and the cable Cb and the connection parts Bcd1 to Bcd3 (see FIG. 4) for connecting the cable Cc and the cable Cd by the partition plate 80. It isolates (refer FIG. 5), and the insulation is improved by isolating between these.

<4. Bottom lid (first lid) sealing step (d)>
Next, it is turned upside down so that the bottom surface portion 61 of the bottom lid portion 60 faces up. Then, a sealing material F such as a putty or a resin adhesive having low fluidity is placed on the bottom surface portion 61, and the cable introduction holes 64a to 64d of the bottom surface portion 61 are sealed (first lid portion sealing step). FIG. 7 shows a cross section of the bottom lid portion 60 sealed with the sealing material F in an upside down state. In the cross-sectional view of FIG. 7, in the bottom surface portion 61, the cables Ca and Cc are inserted through the cable introduction holes 64 a and 64 c of the bottom surface portion 61. The cable introduction holes 64a to 64d have shapes corresponding to the cables Ca to Cd. Since the opening area is small in a state where the cables Ca to Cd are inserted, the cable introduction holes 64a to 64d are made of the sealing material F. Can be easily sealed. Further, as shown in FIG. 7, the bottom surface portion 61 of the bottom lid portion 60 forms a concave surface having a peripheral wall portion 62 on the periphery. Since the bottom surface portion 61 forms a concave surface in this way, it is easier to fill the concave surface of the bottom surface portion 61 with the sealing material F with a thickness. That is, the peripheral wall portion 62 makes it easier to fill the concave surface of the bottom surface portion 61 with the sealing material F thick.

  The conventional joint box does not have the bottom surface portion 61, and a portion corresponding to the bottom surface portion 61 is an opening. A plurality of cables are bundled in the opening. Here, since it is an opening, it was not easy to seal the bottom lid 60 side of the body 40. On the other hand, in the joint box 10, since the opened part is a part of the cable introduction holes 64a to 64d of the bottom cover part 60, it can be easily sealed. Further, in the opening of the conventional joint box, the cables are bundled, so that gaps surrounded by a plurality of cables are generated. And it is difficult to seal this gap with the sealing material F. Since the joint box 10 of the present embodiment is inserted into one cable introduction hole 64a to 64d for each cable, the cables and the cables are arranged with a gap therebetween. For this reason, since there is no gap surrounded by a plurality of cables, the bottom surface of the bottom lid 60 can be easily sealed with the sealing material F. As described above, by providing the cable introduction holes 64 a to 64 d and the peripheral wall portion 62 in the bottom lid portion 60, it becomes easy to seal the bottom surface portion 61 of the bottom lid portion 60 using the sealing material F. Yes. In addition, the method for sealing the bottom surface portion 61 of the bottom lid portion 60 with the sealing material F has been described above.

  When the bottom surface portion 61 is sealed in this manner, it is further turned over from the upside down state to return the vertical positional relationship. And it will be in the state shown by Drawing 6 (E) by removing upper lid part 20 from body part 40. FIG. Next, the cables Ca to Cd coming out from the bottom surface portion 61 of the bottom lid portion 60 and the cable support portion 65 extending downward from the bottom surface portion 61 are bound using a binding band T. Here, the cables Ca to Cd and the cable support portion 65 may be bundled first, and then the upper lid portion 20 may be removed.

<5. Curable resin sealing step (f)>
Next, the curable resin R is injected from the upper surface of the body portion 40 (see FIG. 6F, curable resin sealing step). Here, in addition to sealing the bottom surface portion 61 of the bottom lid portion 60 in the above-described bottom lid portion (first lid portion) sealing step (d), the top lid portion 20 is removed in advance, so that the curability is improved. The resin R can be injected from the upper surface of the body portion 40. As described above, the joint box 10 of the present embodiment can easily seal the bottom surface portion 61 of the bottom lid portion 60, and the upper lid portion 20 can be easily detached from the trunk portion 40. The curable resin sealing step of injecting the curable resin R from the upper surface of the substrate and sealing the connection portions Bab1 to Bab3 and Bcd1 to Bcd3 with the curable resin R can be further facilitated. Although not shown in FIG. 6F, the partition plate 80 is attached to the internal space of the body portion 40 as described above. In addition, as described above, the connection portions Bab1 to Bab3 that connect the cable Ca and the cable Cb and the connection portions Bcd1 to Bcd3 that connect the cable Cc and the cable Cd are separated by the partition plate 80. Isolation between these is further enhanced by insulation. The connection portions Bab1 to Bab3 and Bcd1 to Bcd3 are sealed with the curable resin R in this state, so that the insulation is further enhanced and insulated.

<6, Upper Lid (Second Lid) Attaching Step (e)>
Next, the upper lid portion 20 is attached to the body portion 40, and the joint box 10 is installed on the wall surface of the building. As described above with reference to FIG. 1, the joint box 10 can be installed using the box installation part 21 of the upper lid part 20 or the box installation part 41 of the body part 40. In addition, the joint box 10 is not in an upside down state, but in the same state as when the body 40 is installed, when the curable resin R is injected (see FIG. 6F). . For this reason, after curable resin R is inject | poured, it can install in the wall surface etc. of a building, without waiting for hardening of curable resin R.

  In the conventional joint box, the upper lid portion 20 and the body portion 40 are integrated, and a portion corresponding to the bottom lid portion 60 is an opening. In the conventional joint box, since the curable resin R needs to be injected from this opening, the curable resin R is injected with the upper and lower positional relationship of the body portion 40 turned upside down. Further, in the conventional joint box, if the upper and lower relation is restored before the curable resin R is cured, the curable resin R may flow out from the lower opening. For this reason, it has been necessary to keep the joint box upside down until the curable resin R is cured.

  On the other hand, after the curable resin R is injected, the joint box 10 of the present embodiment can be installed on the wall surface of a building without waiting for the curable resin R to be cured. That is, the joint box 10 has a separate configuration in which the bottom surface portion 61 of the bottom lid portion 60 can be easily sealed using the sealing material F, and the upper lid portion 20 can be connected to the body portion 40. Thus, it can be installed on the wall surface of the building without waiting for the curing of the curable resin R. In the above, the construction method of the joint box 10 of this embodiment was demonstrated.

  In addition, the construction of the joint box 10 described above may include a bottom lid (first lid) sealing step depending on circumstances, such as when testing whether the wire connection portion is correctly connected or when simply sealing the connection portion. It is also possible to perform simple construction without (d) and the curable resin sealing step (f). The binding of the cables Ca to Cd and the cable support unit 65 using the binding band T performed in the above-described bottom lid (first lid) sealing step (d) may be performed as appropriate. In a state after performing this simple construction, electricity can be passed through the cables Ca to Cd to test whether or not the cables Ca to Cd are correctly wired. Here, as long as the wiring can be tested, the cables Ca to Cd and the cable support portion 65 do not necessarily have to be bound by the binding band T. And you may perform a bottom cover part (1st cover part) sealing process (d) and curable resin sealing process (f) later as needed.

  In the joint box 10 after this simple construction, the cables Ca to Cd are inserted into the cable introduction holes 64a to 64d of the bottom cover 60, and the cable introduction holes 64a to 64d are generally closed. For this reason, the internal space of the joint box 10 is also generally sealed. Therefore, the joint box 10 can seal the connection portions Bab1 to Bab3 and Bcd1 to Bcd3 accommodated in the internal space in a generally sealed manner.

  After such a simple construction, the periphery of the cable introduction holes 64 a to 64 d (opening region) of the bottom lid part 60 (first lid part) is surrounded by the peripheral wall part 62. For this reason, the peripheral wall portion 62 can prevent foreign matters such as scattered water from entering the internal space of the body portion 40 from the cable introduction holes 64a to 64d (opening regions). That is, the peripheral wall portion 62 can prevent foreign matters such as scattered water from entering the internal space of the body portion 40.

  In addition, the bottom lid (first lid) sealing step (d) may be a simpler sealing step, and the curable resin sealing step (f) may be omitted. Here, as a process for performing simpler sealing, for example, instead of using the sealing material F in the bottom lid (first lid) sealing step (d), it is easy to remove grease or to remove easily. An adhesive having a weak adhesive strength may be used. In this step, it is not necessary to turn it upside down (see FIG. 7). Further, as described above, the cable introduction holes 64 a to 64 d (opening regions) are surrounded by the peripheral wall portion 62, and foreign matter such as scattered water enters the internal space of the body portion 40. Can prevent.

  Moreover, the construction of the joint box 10 described above can omit the curable resin sealing step (f) in some cases. That is, the construction of the joint box 10 is performed by performing the above-described cable insertion step (a) to bottom lid portion (first lid portion) sealing step (d) and then the upper lid portion (second lid portion) attaching step ( e) may be performed. In the joint box 10 after construction, the curable resin R is not injected into the internal space, but the bottom surface portion 61 of the bottom lid portion 60 is sealed with the sealing material F, and the bottom surface portion 61 becomes a closed surface. ing. Therefore, the internal space of the joint box 10 is sealed by the upper lid portion 20, the body portion 40, and the bottom lid portion 60. Therefore, the joint parts 10 can seal and insulate the connection parts Bab1 to Bab3 and Bcd1 to Bcd3 accommodated in the internal space of the body part 40. And the upper cover part 20 can be removed from the joint box 10 as needed, and a curable resin sealing process (f) can also be performed.

  Furthermore, in this embodiment, the joint box 10 includes the partition plate 80, but the partition plate 80 may not necessarily be attached to the joint box 10. Further, the joint box 10 may not include the partition plate 80. When the joint box 10 does not include the partition plate 80, the body portion 40 may not include the partition plate introduction grooves 44a and 44b.

  As described above, the joint box 10 of the present embodiment has the following operational effects. In the conventional joint box, a portion corresponding to the upper lid portion 20 (second lid portion) and a portion corresponding to the body portion 40 are integrally configured, and a portion corresponding to the bottom lid portion 60 (first lid portion). Not equipped. In the conventional joint box, the portion corresponding to the upper lid 20 (the portion corresponding to the second lid) is closed, but the portion corresponding to the bottom lid 60 (first lid). Is an opening. Sealing this opening is difficult because of the large opening area.

  On the other hand, the body part 40 of the joint box 10 of this embodiment is opened by the cable introduction holes 64a-64d (opening area | region) which the bottom cover part 60 (1st cover part) has in part. Since the cable introduction holes 64a to 64d (opening regions) are a part of the bottom lid 60 (first lid), the opening area is smaller than that of the conventional joint box. Furthermore, the cable Ca-Cd is inserted through the cable introduction holes 64a to 64d (opening area) of the bottom cover part 60 (first lid part), so that the opening area of the cable introduction holes 64a to 64d (opening area) is obtained. And the sealing property of the bottom lid part 60 (first lid part), and thus the sealing property of the body part 40, can be improved as compared with the conventional joint box. As described above, the joint box 10 can improve the sealing performance by including the bottom lid part 60 (first lid part) having an opening region through which the cables Ca to Cd can be inserted.

  Further, as shown in FIG. 2, the upper lid portion 20 (second lid portion) has a separate structure that can be connected to the body portion 40. Therefore, by removing the upper lid portion 20 (second lid portion) from the body portion 40, the construction of the joint box 10 can be facilitated.

  As shown in FIGS. 2 and 3, the upper lid portion 20 (second lid portion) can be connected by screwing with the body portion 40. Accordingly, the upper lid portion 20 (second lid portion) can be connected and removed by screwing, and thus can be more easily connected to and removed from the body portion 40.

  Further, as shown in FIG. 2, the body 40 and the bottom lid 60 (first lid) are separately configured so as to be connectable by screwing. Therefore, the construction can be performed with the bottom lid 60 (first lid) removed from the body 40, and the bottom lid 60 (first lid) can be removed from the trunk 40 to produce a joint. The installation of the box 10 can be made easier.

  Further, as shown in FIG. 7, the bottom surface portion 61 of the bottom lid portion 60 forms a concave surface having a peripheral wall portion 62 on the periphery. Since the bottom surface portion 61 forms a concave surface in this way, it is easier to fill the concave surface of the bottom surface portion 61 with the sealing material F with a thickness. That is, the peripheral wall portion 62 makes it easier to fill the concave surface of the bottom surface portion 61 with the sealing material F thick.

  The bottom lid 60 (first lid) has a cable support 65 (rod-like portion) that extends in the axial direction of the body 40. Therefore, the cable support part 65 (bar-shaped part) can be bundled together with the cables Ca to Cd. In this embodiment, the cable support part 65 (bar-shaped part) and the cables Ca to Cd can be easily bundled using the binding band T.

  Moreover, the trunk | drum 40 has the partition plate 80 which divides interior space into a some division. The partition plate 80 is separated from each other by separating the connection portions Bab1 to Bab3 that connect the cables Ca and Cb and the connection portions Bcd1 to Bcd3 that connect the cables Cc and Cd into sections. The insulation between the parts can be further enhanced.

  Moreover, the construction method of the joint box 10 in the present invention includes the cable insertion step (a), the connection step (b), the body portion accommodation step (c), the bottom lid portion (first lid portion) sealing step (d), It is the construction method of the joint box 10 including an upper cover part (2nd cover part) attachment process (e).

  As shown in FIG. 1 and FIG. 2, the internal space of the body portion 40 before construction is the upper lid portion 20 (second lid) having the closed surface portion 22 on the upper lid portion 20 side (second lid portion side). Part) and is opened in the opening region of the bottom lid 60 (first lid) on the bottom lid 60 side (first lid side). According to this construction method, the bottom lid 60 (first lid) is sealed with the sealing material F in the bottom lid (first lid) sealing step (d). Since the upper lid portion 20 side (second lid portion side) of the trunk portion 40 is closed, and the bottom lid portion 60 side (first lid portion side) of the trunk portion 40 is also sealed, The interior space can be sealed. And the internal space of the trunk | drum 40, ie, the internal space of the joint box 10, has accommodated connection part Bab1-Bab3, Bcd1-Bcd3 by the trunk | drum part accommodation process (c). Accordingly, since the connection parts Bab1 to Bab3 and Bcd1 to Bcd3 are accommodated in the sealed internal space of the joint box 10, the connection parts Bab1 to Bab3 and Bcd1 to Bcd3 can be further insulated and protected by insulation. .

  Moreover, the construction method of the joint box 10 includes a curable resin sealing step (f). Therefore, according to this construction method, the connection portions Bab1 to Bab3 and Bcd1 to Bcd3 can be further sealed with the curable resin R. And since connection part Bab1-Bab3 and Bcd1-Bcd3 are sealed by the curable resin R, insulation is further improved and insulation protection is carried out.

[Modification 1]
In the following modifications including the present modification, detailed description of the same configurations as those of the above-described embodiment will be omitted. In the above-described embodiment, the body 40 and the bottom lid 60 are configured as separate bodies that can be connected. However, you may comprise the trunk | drum 40 and the bottom cover part 60 as integral. In the joint box 110 of the first modification, the body part 40 and the bottom cover part 60 according to the embodiment are integrally configured as a body part 140. FIG. 8 shows an exploded perspective view of the joint box 110 after construction. Further, similarly to the joint box 10 of the above-described embodiment, the joint box 110 of the present embodiment may not include the partition plate 180. When the joint box 110 does not include the partition plate 180, the body unit 140 may not include the partition plate introduction grooves 144a and 144b. The joint box 110 of this modification can suppress an increase in the number of parts by integrally configuring the body portion and the bottom lid portion. Further, since the body part and the bottom cover part cannot be separated, it is more advantageous to ensure sealing performance.

  The construction method of the joint box 110 can apply the construction method similar to the construction method of the joint box 10 of embodiment mentioned above. However, in the connection step (b) of the embodiment described with reference to FIG. 6C, the connection is made in a state where the body portion 40 is removed from the bottom cover portion 60, but in this modification, from the body portion 140. By performing the connection with the upper cover part 120 removed, the connection can be easily performed. That is, the joint box 110 of this modification has a separate structure in which the upper lid portion 120 (second lid portion) can be connected to the body portion 140, thereby connecting the ends of the plurality of cables Ca to Cd. Can make work easier.

[Modification 2: FIG. 9B]
The cables connected in the internal space of the joint box 10 according to the above-described embodiment are four three-core flat cables Ca to Cd, and the cross section is an ellipse. For this reason, as shown in FIG. 2 and FIG. 9 (A), the cable introduction holes 64a to 64d of the bottom cover part 60 through which the cables Ca to Cd are inserted are four in number and all have the shape. It has an oval shape. However, the shape and number of cables connected in the internal space of the joint box of the present invention are not limited to four three-core flat cables. The number of cable cores (number of cores), shape (round shape, flat shape, etc.), and number can be changed as appropriate. And the number and arrangement | positioning of a cable introduction hole can also be changed suitably. The shape of the cable introduction hole can be a shape corresponding to the cross-sectional shape of the cable. That is, the shape of the cable introduction hole can be made circular for a round cable, and the shape of the cable introduction hole can be made oval for a flat cable.

  The number and shape of the cables connected in the internal space of the joint box 210 of the second modification are two round cables and two flat cables. The number of cores of these cables should just be one or more. The flat cable has an oval cross section, and the round cable has a circular cross section. Therefore, in the joint box 210 of this modification example, as shown in FIG. 9B, the bottom surface portion 261 of the bottom cover portion 260 has two circular cable introduction holes 264a and 264c and two long lengths. Circular cable introduction holes 264b and 264d are provided.

[Modification 3: FIG. 9C]
The number and shape of the cables connected in the internal space of the joint box 310 of the modification 3 are four round cables. The number of cores of these cables should just be one or more. As shown in FIG. 9C, in the joint box 310 of this modification, the bottom surface portion 361 of the bottom cover portion 360 includes four circular cable introduction holes 364a to 364d. In the above embodiment, modification 2 and modification 3, the case where four cables are connected has been described with reference to FIGS. 9A to 9C. However, the number of cables to be connected is three. It may be.

[Modification 4: FIG. 9D]
The number and shape of the cables connected in the internal space of the joint box 410 of the modification 4 are three flat cables. The number of cores of these cables should just be one or more. As shown in FIG. 9D, in the joint box 410 of this modification, the bottom surface portion 461 of the bottom cover portion 460 includes three oval cable introduction holes 464a to 464c.

[Modification 5: FIG. 9E]
The number and shape of the cables connected in the internal space of the joint box 510 of Modification 5 are one round cable and two flat cables. The number of cores of these cables should just be one or more. As shown in FIG. 9E, in the joint box 510 of the present modification, the bottom surface portion 561 of the bottom cover portion 560 has one circular cable introduction hole 564a and two elliptical cable. Introducing holes 564b and 564c.

[Modification 6: FIG. 9F]
The number and shape of the cables connected in the internal space of the joint box 610 of Modification 6 are three round cables. The number of cores of these cables should just be one or more. As shown in FIG. 9 (F), in the joint box 610 of this modification, the bottom surface portion 661 of the bottom cover portion 660 includes three circular cable introduction holes 664a to 664c. Although the case where the number of cables to be connected is three has been described above with reference to FIGS. 9D to 9F, the number of cables may be five.

[Modification 7: FIG. 9G]
The number and shape of the cables connected in the internal space of the joint box 710 of the modification 7 are five flat cables. The number of cores of these cables should just be one or more. As shown in FIG. 9G, in the joint box 710 of this modification, the bottom surface portion 761 of the bottom lid portion 760 includes five oval cable introduction holes 764a to 764e.

[Modification 8: FIG. 9 (H)]
The number and shape of the cables connected in the internal space of the joint box 810 of the modification 8 are two flat cables and three round cables. The number of cores of these cables should just be one or more. As shown in FIG. 9H, in the joint box 810 of this modification, the bottom surface portion 861 of the bottom cover portion 860 has two oval cable introduction holes 864b and 864e and three circular shapes. Cable introduction holes 864a, 864c, and 864d.

[Modification 9: FIG. 9 (I)]
The number and shape of the cables connected in the internal space of the joint box 910 of the modification 9 are five round cables. The number of cores of these cables should just be one or more. As shown in FIG. 9I, in the joint box 910 of the present modification, the bottom surface portion 961 of the bottom lid portion 960 includes five circular cable introduction holes 964a to 964e.

  In the above, the case where the number of cables connected in the internal space of the joint box of the present invention is 3 to 5 has been described with reference to FIGS. 9A to 9I. The number of is not limited to 3-5 and may be two or more. Further, as described above, the shape and number of the cable introduction holes can be appropriately changed according to the shape of the cable. In addition, the position of the cable introduction hole in the bottom surface portion 61 can be changed as appropriate.

[Modification 10: FIG. 10B]
As described above with reference to FIG. 2, in the joint box 10 of the embodiment, the body 40 includes the partition plate introduction grooves 44 a and 44 b in order to hold the partition plate 80. FIG. 10A shows a cross-sectional view of the body 40 along the line AA in FIG. As shown in FIGS. 2, 3, and 10A, the partition plate 80 is fitted into the partition plate introduction groove 44a and the partition plate introduction groove 44b, so that the internal space of the body portion 40 can be obtained. Retained. Here, the partition plate 80 is only required to be held inside the body portion 40, and the partition plate introduction grooves 44 a and 44 b are not necessarily provided in the body portion 40.

  FIG. 10B shows a cross-sectional view of the body portion 1040 and the partition plate 1080 included in the joint box 1010 of the modification 10 as in FIG. 10A. As shown in FIG. 10B, in the joint box 1010 of this modification, partition plate introduction protrusions 1045 a to 1045 d that protrude inward are provided on the inner peripheral surface of the body part 40. The partition plate introduction protrusions 1045a to 1045d can hold the partition plate 1080 by fitting the partition plate 1080 similarly to the partition plate introduction grooves 44a and 44b of the above-described embodiment.

[Modification 11: FIG. 11]
FIG. 11 shows a cross section of the body portion 1140 and the partition plate 1180 of the joint box 1110 according to the eleventh modification. Unlike the above-described embodiment, in this modification, the partition plate introduction grooves 44 a and 44 b are not provided in the body portion 1140. Further, as shown in FIG. 11, the width W of the partition plate 1180 is set to be slightly smaller than the inner diameter of the body portion 1140. By setting the length W in the width direction to such a length, the partition plate 1180 is prevented from being inclined greatly by the inner wall surface of the body portion 1140 when installed in the internal space of the body portion 1140. The As described above, since the partition plate 1180 is prevented from being largely inclined at the inner wall surface of the body portion 1140, the connection portions Bab1 to Bab3 of the cables Ca and Cb and the cables Cc and Cd are the same as the partition plate 80 of the embodiment. The connection portions Bcd1 to Bcd3 can be isolated from each other, and the insulation between the connection portions isolated from each other can be further enhanced. Further, the partition plate 1180 is held in the body portion 1140 so as to be rotatable in the circumferential direction. For this reason, the partition plate 1180 is located at a position where stresses (such as cable twisting and bending stress) generated by the cables Ca to Cd and the connection parts Bcd1 to Bcd3 and Bcd1 to Bcd3 being accommodated in the body part 1140 are relatively small. Can be moved.

[Modification 12: FIG. 12]
FIG. 12 shows a cross section of the body 1240 and the partition plate 1280 of the joint box 1210 of the modification 12. As shown in FIG. 12, the partition plate 1280 has partition plate fixing protrusions 1281 a to 1281 d extending in the circumferential direction of the body portion 1240 at both ends. Also, unlike the above-described embodiment, the partition plate introduction grooves 44a and 44b are not provided in the body portion 1240 even in this modification. The partition plate 1280 is held on the inner wall surface of the body portion 1240 by the partition plate fixing protrusions 1281a to 1281d. Since the partition plate 1280 can be held by the inner wall surface of the body portion 1240 in this manner, the connection portions Bab1 to Bab3 of the cables Ca and Cb and the connection portions Bcd1 of the cables Cc and Cd are the same as the partition plate 80 of the embodiment. Isolation between Bcd3 and the insulation between the connection parts isolated from each other can be further enhanced. Further, the partition plate 1280 is held so as to be rotatable in the circumferential direction in the same manner as the partition plate 1180 of the modified example 11 described above. For this reason, the partition plate 1280 is located at a position where stress (such as cable twisting or bending) generated by the cables Ca to Cd and the connection portions Bcd1 to Bcd3 and Bcd1 to Bcd3 being accommodated in the body portion 1240 is relatively small. Can be moved.

[Modification 13: FIG. 13B]
As described above with reference to FIGS. 3 to 5, in the embodiment, the connection portions Bab1 to Bab3 for connecting the cable Ca and the cable Cb and the connection portions Bcd1 to Bcd3 for connecting the cable Cc and the cable Cd are partitioned. By isolating with the board 80, the insulation between these can be improved further. However, the division method may be divided according to the color of the insulator (coating) of the core wire constituting the connection part. FIG. 13A schematically shows a state in which the partition plate 1380 provided in the joint box 1310 of the modification 13 separates the connection portions for each color of these insulators. As described above with reference to FIG. 4, in the cables Ca to Cd, the core (Ca1), the core (Cb1), the core (Cc1), and the core (Cd1) have the same color of the insulator (covering).

  The core wire Ca1 and the core wire Cb1 are connected by the connection portion Bab1, and the core wire Cc1 and the core wire Cd1 are connected by the connection portion Bcd1. In these connection part Bab1 and connection part Bcd1, the color of the insulator of the connected core wire is common, and is accommodated in the same section (see FIG. 13A). Similarly, the connection part Bab2 and the connection part Bcd2 in which the colors of the insulators of the connected core wires are common are accommodated in one section. Similarly, the connection part Bab3 and the connection part Bcd3 in which the colors of the insulators of the connected core wires are common are accommodated in one section. When the color of the insulator is different depending on the phase of the current or voltage flowing through the core wire, the partition plate 1380 separates the connection portions Bab1 to Bab3 and Bcd1 to Bcd3 according to the phase of the current and voltage.

  As described above, in the joint box 1310 of this modification, the partition plate 1380 partially divides the body portion 1340 into three sections, and the connection portions Bab1 to Bab3 and Bcd1 to Bcd3 are stored separately in these three sections. . FIG. 13B shows a cross-sectional view of the body portion 1340 and the partition plate 1380 as in FIG. As shown in FIG. 13B, the partition plate 1380 has partition walls 1380a to 1380c extending radially outward from the center and spaced apart in the circumferential direction. The partition plate 1380 partially divides the body portion 1340 into three sections by three partition walls 1380a to 1380c. As shown in FIG. 13A, the connection portions Bab1 to Bab3 and Bcd1 to Bcd3 can be separately accommodated in these three sections. In this way, by separating and accommodating by the color of the insulator of the core wire constituting the connection portion, the insulation between the connection portions separated by the partition plate 1380 can be enhanced. The body portion 1340 is provided with partition plate introduction grooves 1344a to 1344c. These partition plate introduction grooves 1344a to 1344c are provided at intervals in the circumferential direction so that the partition plate 1380 can be held. Here, although the three partition plate introduction grooves 1344a to 1344c are provided, the number of the partition plate introduction grooves is not limited to three as long as the partition plate 1380 can be held. For example, six partition plate introduction grooves may be provided on the inner peripheral surface side of the body portion 1340 at intervals in the circumferential direction. By providing six partition plate introduction grooves in this way, the partition plate introduction groove is not limited to the partition plate 1380 of the present modification that is divided into three sections, but the plate-shaped partition plate 80 according to the embodiment divided into two sections. Can also be retained.

  Moreover, in this modification, as above-mentioned, the three partition walls 1380a-1380c with which the partition plate 1380 is provided are arrange | positioned at intervals in the circumferential direction. The body portion 1340 is partially divided into three sections. The number of partition walls included in the partition plate may be four or more, and the body portion may be partially divided into four or more sections. In addition, the partition walls 1380a to 1380c have a plate shape extending in the radial direction from the center to the outside, but the shape can be appropriately changed such as a bent plate shape.

  Further, when the cables Ca to Cd connected in the joint box 1310 of this modification are connected by three connection portions Babcd1 to Babcd3 as shown in the connection diagram shown in FIG. Can also be used. In this case, as shown in FIG. 13D, the partition plate 1380 can improve the insulation between these connection parts by separating the connection parts Babcd1 to Babcd3 for each connection part.

[Modification 14: FIG. 14]
As described above with reference to FIG. 2, the bottom surface portion 61 of the joint box 10 according to the embodiment is provided with the cable support portion 65 having a circular cross section and a bar shape extending downward from the center of the lower surface. And as FIG. 2 shows, the cable support part 65 is substantially cylindrical shape. However, the cable support portion 65 is not limited to a substantially cylindrical shape.

  As described above with reference to FIG. 3, in the joint box 10 of the embodiment after construction, the cable support portion 65 and the cables Ca to Cd extending from the bottom surface portion 61 of the bottom lid portion 60 are bound by the binding band T. Yes. FIG. 14A schematically shows a state where the cable support portion 65 and the cables Ca to Cd of the embodiment are bundled. In FIG. 14A, the cables Ca and Cc are shown, but the cables Cb and Cd are not shown. On the other hand, FIG. 14B is a schematic diagram showing a state in which the cable support 1465 and the cables Ca to Cd are bundled in the joint box 1410 of the modified example 14 after the construction. ) Is shown as well. As shown in FIG. 14B, the cable support portion 1465 of the joint box 1410 is provided with a binding band removal prevention portion 1466 that bulges in the circumferential direction at the end. The binding band T is a portion on the upper side of the binding band removal preventing portion 1466 and binds the cable support portion 1465 and the cables Ca to Cd (see FIG. 14B). Here, below the binding band T, there is a binding band removal prevention part 1466. Further, in the vicinity of the binding band removal preventing portion 1466, the binding band bulges in the circumferential direction. For this reason, the binding band T can be further prevented from being detached by the binding band removal preventing portion 1466.

[Modification 15: FIG. 15]
As shown in FIG. 1, the joint box 10 of the embodiment described above has a substantially cylindrical outer shape. However, the outer shape of the joint box 10 is not limited to a substantially cylindrical shape. As shown in FIG. 15, the joint box 1510 of the modified example 15 has a substantially quadrangular prism as the outer shape. In the joint box 1510 of this modification, the outer shape of the peripheral wall portion 1523 of the upper lid portion 1520, the body portion 1540, and the peripheral wall portion 1562 of the bottom lid portion 1560 is a quadrangular prism shape. As described above, the outer shape of the joint box of the present invention can be substantially polygonal. For example, the outer shape of the joint box of the present invention may be substantially triangular, substantially pentagonal, or substantially hexagonal. Moreover, it can change suitably not only in a substantially polygonal column shape.

  As mentioned above, although embodiment and the modification of this invention were described, the joint box of this invention is not limited to embodiment mentioned above or a modification, It can implement with other various forms. For example, the joint box does not necessarily include a partition plate. When the joint box does not include the partition plate, the body portion does not need to include the partition plate introduction groove. In addition, as described above, a connection connector is not necessarily used for cable connection. For example, the core wire may be connected using a sleeve. When connecting using a sleeve, the sleeve and the tip portions of a plurality of core wires connected by the sleeve are combined to form a connection portion. Of course, a connection part using a connection connector and a connection part using a sleeve may be used in combination.

  Moreover, the shape and arrangement of the box installation part 21 and the shape and arrangement of the box installation part 41 can be changed as appropriate. Moreover, you may combine multiple characteristic parts of the modifications 1-15 mentioned above. For example, Modification 1 and Modification 2 may be combined. As described above, the joint box 110 of Modification 1 is a characteristic part of the body part 140, and the body part 140 is formed by integrally forming the body part 40 and the bottom cover part 60 of the embodiment. And in the joint box 210 of the modified example 2, the cable introduction holes 264a to 264d are characteristic portions. In the joint box 210 of the second modification, the bottom surface portion 261 includes two circular cable introduction holes 264a and 264c and two long cables in order to accommodate connection portions of two round cables and two flat cables. Circular cable introduction holes 264b and 264d are provided (see FIG. 9B). When the modification 1 and the modification 2 are combined, in the body part 140 of the modification 1, the two elliptical cable introduction holes 164a to 164d of the bottom surface part 161 of the body part 140 are replaced with the two parts of the modification 2 Circular cable introduction holes 264a and 264c and two oval cable introduction holes 264b and 264d are provided.

  Similarly, the features of the embodiment and the modifications 1 to 15 can be combined as appropriate. That is, the trunk portion 140 (see FIG. 8) of Modification 1 in which the trunk portion 40 and the bottom lid portion 60 are integrally formed in the joint box 10 of the embodiment, the cable introduction hole of any one of Modifications 2 to 9 (see FIG. 9 (B) to FIG. 9 (I)), the body part and the partition plate (see FIGS. 10 to 13) of any of Modifications 10 to 13, and the cable support 1465 of Modification 14 (see FIG. 14). Furthermore, the outer shape (see FIG. 15) as in Modification 15 can be combined as appropriate.

DESCRIPTION OF SYMBOLS 10 Joint box 20 Upper cover part 21 Box installation part 22 Closure surface part 23 Peripheral wall part 24 Female thread part 40 Body part 41 Box installation part 42 Male screw part 43 Male screw part 44a, 44b Partition plate introduction groove 60 Bottom cover part 61 Bottom part 62 Perimeter wall part 63 Female thread part 64a-64d Cable introduction hole 65 Cable support part 80 Partition plate Ca-Cd Cable Ca1-Ca3, Cb1-Cb3, Cc1-Cc3, Cd1-Cd3 Core wire Jab1-Jab3, Jcd1-Jcd3 Connection connector Bab1-Bab3, Bcd1 ~ Bcd3 Connection F F Sealing material R Curable resin T Binding band

Claims (8)

It is a joint box that houses and protects the connection part where the ends of a plurality of cables are connected,
A body portion configured in a tubular shape;
A first lid part having an opening region through which the cable can be inserted at one end in the axial direction of the body part;
A second lid portion having a closed surface for closing the other axial end opposite to the one axial end side of the body portion and being configured as a separate body connectable to the body portion;
With joint box. The joint box according to claim 1,
The second lid part is a joint box connectable by screwing with the body part. The joint box according to claim 2,
The joint box in which the body portion and the first lid portion are separately configured to be connectable by screwing. The joint box according to any one of claims 1 to 3,
The peripheral edge of the first lid part is a joint box having a peripheral wall part on the side opposite to the body part side. The joint box according to any one of claims 1 to 4,
The first lid portion is a joint box having a rod-like portion extending in the axial direction of the body portion. The joint box according to any one of claims 1 to 5,
The trunk portion is a joint box having a partition plate that divides an internal space into a plurality of sections. It is a method of constructing a joint box that accommodates and protects insulation by accommodating a connection portion in which ends of a plurality of cables are connected, and the joint box includes:
A body portion configured in a tubular shape;
A first lid part having an opening region through which the cable can be inserted at one end in the axial direction of the body part;
A second lid portion having a closing surface for closing the other axial end opposite to the one axial end side of the body portion and a separate structure connectable to the body portion;
(A) a cable insertion step of inserting the ends of the plurality of cables into the opening region of the first lid portion;
(B) A connection step of creating the connection portion in which the ends of the cables are connected by connecting the ends of the cables.
(C) a trunk part accommodation step of accommodating the connection part in an internal space of the trunk part;
(D) a first lid sealing step for sealing the opening region of the first lid with a sealing material;
(E) a second lid attaching step for connecting the second lid to the body portion;
Of joint box construction including The joint box construction method according to claim 7,
Furthermore, after the first lid sealing step,
(F) a curable resin sealing step for sealing the internal space of the body part by injecting a curable resin from the other axial end of the body part;
Of joint box construction including

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