JP2022133830A - Cable installation structure and cable support body - Google Patents

Abstract

To provide a cable installation structure and a cable support body allowing cable work to be easily carried out.SOLUTION: A cable installation structure comprises: ceiling joists 3 supporting ceiling members 2; a connection object 5 installed on the ceiling members 2, to which a cable 4 is connected from an attic space S; and a cable support body 6 supporting the cable 4. The cable support body 6 comprises: a ceiling joist attachment part 16 attachable on the ceiling joist 3; and a cable support part 17 supporting the cable 4 in a state of being attached on the ceiling joist 3 with the ceiling joist attachment part 16. The cable support body is attached to a portion near an installation position P of the connection object 5 on the ceiling joist 3 with the ceiling joist attachment part 16, and supports the cable 4 with the cable support part 17 near the installation position P of the connection object 5.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cable support and a cable installation structure that can be used when installing cables in a space above the ceiling. More specifically, the present invention relates to a cable installation structure including a ceiling joist supporting a ceiling material and a connection object installed on the ceiling material and to which a cable is connected from a ceiling space.

Patent Literature 1 discloses a ceiling material support structure including ceiling joists that support the ceiling material. In such a ceiling material support structure, when a connection object to which a cable is to be connected is installed on the ceiling material, there are cases where work is performed on the cable from the installation position of the connection object. To explain, a hole is made in the ceiling material at the position where the connection object is installed, and after performing the work of inserting the hand into the hole from the lower side of the ceiling material and connecting the cable to the connection object, the connection object may be installed in a hole in the ceiling material. Patent Document 1 shows a configuration in which the joists are suspended and supported by hanging bolts, and Patent Document 2 shows a configuration in which cables are supported by supports fixed to the hanging bolts. . That is, when a cable is supported in a ceiling material support structure such as that of Patent Document 1, it is conceivable to fix the support shown in Cited Document 2 to the suspension bolt and support the cable on the support.

JP 2017-193886 A JP 2017-089828 A

However, there are cases where the position of the suspension bolt is far from the installation position of the object to be connected on the ceiling material. Since it is difficult to do, it is assumed that it is difficult to connect the cable to the connection object, and that the cable is damaged by working on the cable away from the installation position.

In view of this situation, a main object of the present invention is to provide a cable installation structure and a cable support that facilitate work on cables.

A first characteristic configuration of the cable installation structure of the present invention includes a ceiling joist that supports a ceiling material, a connection object that is installed on the ceiling material and to which a cable is connected from the space above the ceiling, and a cable that supports the cable. a support;
The cable support includes a joist attachment portion that can be freely attached to the joist, and a cable support portion that supports the cable while attached to the joist at the joist attachment portion. The joist mounting portion is attached to a portion of the joist near the installation position of the connection object, and the cable is supported by the cable support portion near the installation position of the connection object. at the point.

According to this configuration, since the cable is supported by the cable support held near the installation position of the object to be connected, it is possible to work on the cable supported by the cable support from the installation position of the object to be connected. This facilitates the work of extending the cable from the cable support to the installation position and the work of connecting the cable to the connection object.

A second characteristic configuration of the cable installation structure of the present invention is that the joist includes a bottom portion, a pair of wall portions extending upward from both sides of the bottom portion in the width direction, and upper portions of the pair of wall portions. a pair of lip portions protruding inward in the width direction from the side end portions,
The hoist attachment portion has a first engaging portion that engages with one of the pair of lip portions and a second engaging portion that engages with the other of the pair of lip portions. .

According to this configuration, by engaging the first engaging portion and the second engaging portion of the joist attachment portion with the pair of lip portions, the cable support portion can be made self-supporting. Therefore, it is not necessary to separately prepare a fixture for fixing the cable supporting portion to the ceiling joist, and the work of holding the ceiling joist attaching portion to the ceiling joist is facilitated.

A third characteristic configuration of the cable installation structure of the present invention is that the first engaging portion is formed to have a length in contact with the bottom portion in a state of being engaged with the lip portion, and has a longitudinal direction along the longitudinal direction of the ceiling joist. It is characterized in that it has an arcuate shape when viewed from the direction and is configured to be elastically deformable.

According to this configuration, the first engaging portion elastically deforms and engages with the lip portion so as to be sandwiched between the lip portion and the bottom portion, thereby elastically engaging the first engaging portion with the lip portion. This makes it easier to appropriately hold the ceiling joist attachment portion to the ceiling joist.

A fourth characteristic configuration of the cable installation structure of the present invention includes, as the joists, a narrow joist edge having a first interval between the pair of walls and a gap between the pair of walls being wider than the first interval. a second spaced wide hem;
The joist mounting portion includes, as the second engaging portion, a second engaging portion for narrow width provided at an interval corresponding to the first interval with the first engaging portion, and the first and a second engaging portion for wide width provided at an interval corresponding to the second interval from the engaging portion.

According to this configuration, by utilizing the first engaging portion and the second engaging portion for narrow width, the joist mounting portion can be held on the narrow joist edge, and the first holding portion and the second engaging portion for wide width can be held. By using the two engaging portions, the joist mounting portion can be held on the wide joist. In this way, one cable support can be held on both the narrow edge and the narrow edge, which improves usability of the cable support. In addition, when the joist mounting portion is held on the narrow joist edge and when it is held on the wide joist edge, the first engaging portion of the joist mounting portion is also used to suppress the enlargement of the joist mounting portion. can do.

A fifth characteristic configuration of the cable installation structure of the present invention is that when the second engaging portion engages with the lip portion from above, the second engaging portion contacts the lip portion and widens the second engaging portion. It is provided with an engaging guide surface that guides inward in the direction.

According to this configuration, by pushing the second engaging portion into the lip portion from above, the second engaging portion in contact with the lip portion is once guided inward in the width direction by the engaging guide surface. Since the second engaging portion can be engaged with the lip portion by moving the second engaging portion, the engaging operation of the second engaging portion can be easily performed.

According to a sixth characteristic configuration of the cable installation structure of the present invention, the cable support portion is provided above the ceiling joist attachment portion and at a position separated from the ceiling joist attachment portion by a set distance or more.

According to this configuration, it is easy to support the cable by the cable supporting portion in a state where the cable is separated upward from the ceiling joist and the ceiling material. Therefore, it is possible to prevent heat dissipation from the cable from being hindered due to the cable coming into contact with the ceiling material or the heat insulating material installed on the upper surface of the ceiling material.

A seventh characteristic configuration of the cable installation structure of the present invention is that the cable supporting portion is provided above the ceiling joist mounting portion and at a position adjacent to the ceiling ceiling mounting portion.

According to this structure, it is easy to support a cable near the upper side of a ceiling joist and a ceiling material by a cable support part. Therefore, it is easy to install the cable along the upper surface of the ceiling material.

The characteristic configuration of the cable support of the present invention is a joist attachment part that can be freely attached to the joist, and a cable that supports the cable installed in the space above the ceiling while being attached to the joist at the joist attachment part. and a support portion, wherein the ceiling joist attachment portion is configured to be attachable to any position in the longitudinal direction of the ceiling joist, and the cable support portion is attached to the ceiling joist at the ceiling joist attachment portion. It is characterized in that the cable can be freely supported in a state where it is held in place.

According to this configuration, the joist mounting portion is attached to a location near the installation position of the connection object on the joist, and the cable is supported by the cable support portion, so that the connection object is installed at the cable support portion. Work on the supported cable is facilitated, and work of extending the cable from the cable support portion to the installation position and work of connecting the cable to the connection object are facilitated.

1 is a perspective view of a cable installation structure showing a state in which a cable is connected to a connection object in the first embodiment; FIG. FIG. 2 is a perspective view of a cable installation structure showing a state before connecting a cable to a connection object according to the first embodiment; The perspective view of the cable support body in 1st Embodiment. The side view which shows the state which attached the cable support body in 1st Embodiment to the narrow edge. The side view which shows the state which attached the cable support body in 1st Embodiment to the wide hem. The side view which shows the state in the middle of attaching the cable support body in 1st Embodiment to a narrow edge. FIG. 11 is a perspective view of a cable installation structure showing a state in which a cable is connected to a connection object according to the second embodiment; FIG. 11 is a perspective view of a cable installation structure showing a state before connecting a cable to a connection object according to the second embodiment; The perspective view of the cable support body in 2nd Embodiment.

[First Embodiment]
1st Embodiment of the cable installation structure which concerns on this invention is described based on drawing.
FIG. 1 shows a state in which a cable support structure 1 employed in an office building, which is an example of a building, is viewed obliquely from above. This cable support structure 1 includes a ceiling joist 3 that supports a ceiling material 2, a connection object 5 that is installed on the ceiling material 2 and to which a cable 4 is connected from a ceiling space S, and a cable support that supports the cable 4. a body 6;

The cable support structure 1 includes, in addition to the joists 3, connection objects 5, and cable supports 6 described above, a plurality of suspension bolts 7 embedded in the lower surface of the floor slab (not shown) of the upper floor, suspension A plurality of joist receivers 8 connected to the lower ends of the bolts 7 are provided. A mat member 9 indicated by a chain line is installed between the joist receivers 8 on the upper side of the joist 3. The mat material 9 is made of glass wool or the like, and is provided as a soundproof material or a heat insulating material. In the description of each component of the cable support structure 1, the direction along which the longitudinal direction of the joist holder 8 extends is defined as the X direction, and the direction perpendicular to the X direction as viewed from above is defined as the Y direction.

The ceiling joist receiver 8 is made of, for example, a long member made of a metal material such as C-shaped steel, and is installed in a posture extending in the X direction. In addition, a plurality of joist receivers 8 are arranged in a row along the Y direction at regular intervals. Each of the ceiling joist receivers 8 is connected to the lower end of a suspension bolt 7 located directly above, and is suspended and supported by the floor slab of the upper floor via the suspension bolt 7 .

The joists 3 are made of, for example, a long member made of a metal material such as aluminum alloy or steel, and installed in a posture extending in the Y direction. In addition, a plurality of joists 3 are installed in a state of being arranged at regular intervals along the X direction. Each of the joists 3 is connected to a plurality of joist receivers 8 arranged in the Y direction and supported by the plurality of joist receivers 8. - 特許庁

As shown in FIGS. 4 and 5, the joist 3 includes a bottom portion 11, a pair of wall portions 12 extending upward from both sides of the bottom portion 11 in the X direction (width direction), and a pair of wall portions 12. and a pair of lip portions 13 protruding inward in the width direction from the respective upper end portions. The pair of walls 12 are formed in the same shape, and the heights of the pair of walls 12 from the bottom 11 are the same. Also, the pair of lip portions 13 are formed in the same shape, and the amount of protrusion of the pair of lip portions 13 from the wall portion 12 is the same. That is, the wall portion 12 and the lip portion 13 on one side of the joist 3 in the X direction and the wall portion 12 and the lip portion 13 on the other side of the joist 3 in the X direction are symmetrical.

As the joist 3, the space between the pair of wall portions 12 is a narrow space 3a (see FIG. 4) with a first space W1, and the space between the pair of wall portions 12 is a wide space with a second space W2 that is wider than the first space W1. There is a joist 3b (see FIG. 5). The narrow edge 3a and the wide edge 3b are formed in the same shape except that the width of the pair of bottom portions 11 in the X direction is different. The height of the wall portion 12 from the bottom portion 11 and the amount of protrusion of the lip portion 13 from the wall portion 12 are the same.

The object to be connected 5 is installed so as to be positioned in a hole 2 a formed in the ceiling material 2 . Specifically, the connection object 5 is installed so as to be positioned in the hole 2a in a state of protruding to both sides of the ceiling material 2 in the vertical direction. In this embodiment, the connection object 5 is a device requiring power supply such as a downlight, a fire alarm, or a speaker, and the cable 4 is a power supply line for supplying power to the connection object 5 . The connection object 5 may be a device for transmitting and receiving information, and the cable 4 may be a communication line.

As shown in FIGS. 3 to 5, the cable support 6 supports the cable 4 in a state in which it is attached to the joist 3 by the joist mounting portion 16 that can be freely attached to the joist 3 and the joist mounting portion 16. and a cable support portion 17 that The cable support 6 is attached to a site near the installation position P (see FIG. 1) of the connection object 5 in the joist 3 at the joist attachment portion 16, and near the installation position P of the connection object 5 The cable 4 is supported by the cable support portion 17 at . In describing the cable support 6, one side in the X direction (left side in FIGS. 4 and 5, Hereinafter, one side in the X direction will be referred to as the left side) and the other side (right side in FIGS. 4 and 5; hereinafter, the other side in the X direction will be referred to as the right side).

In this embodiment, the cable support portion 17 is provided above the ceiling joist mounting portion 16 and at a position separated from the ceiling ceiling mounting portion 16 by a set distance. More specifically, the cable support 6 has a hoist mounting portion 16 at the lower end of the cable support 6, and a cable support 17 at the upper end of the cable support 6. A connecting portion 18 is provided between the joist attachment portion 16 and the cable support portion 17 in the above. Since the connection portion 18 is provided between the ceiling joist mounting portion 16 and the cable support portion 17 in this manner, the cable support portion 17 is positioned above the ceiling ceiling mounting portion 16 from the ceiling mounting portion 16. Located a set distance apart. Note that the set distance is the same as the vertical length of the connecting portion 18 and is larger than the vertical thickness of the mat material 9 . In this embodiment, the joist attachment portion 16, the cable support portion 17, and the connection portion 18 are integrally formed, and the cable support 6 is made of a resin material.

The hoisting attachment portion 16 includes a first engaging portion 21 that engages with one of the pair of lip portions 13 and a second engaging portion 22 that engages with the other of the pair of lip portions 13 . The joist mounting portion 16 engages the first engaging portion 21 with one of the pair of lip portions 13, and engages the second engaging portion 22 with the other of the pair of lip portions 13, so that the joist 3 configured to be attached to the That is, the joist mounting part 16 is attached to the joist 3 with the lip part 13 on the left side of the joist 3 as one lip part 13 and the lip part 13 on the right side of the joist 3 as the other lip part 13. In addition, the lip part 13 on the right side of the joist 3 can be used as one lip part 13, and the lip part 13 on the left side of the joist 3 can be attached to the joist 3 as the other lip part 13. In short, the joist mounting part 16 is attached to the joist 3 in the posture shown in FIG. 4 and FIG. It is possible.

The joist attachment part 16 can be attached at any position in the Y direction on the joist 3, and can be attached at the same position as the installation position P in the Y direction. In the state shown in FIGS. 1 and 2, the joist attachment portion 16 is attached at a position closer to the installation position P than the suspension bolt 7 closest to the installation position P. As shown in FIG. In addition, in the joist 3 adjacent to the installation position P, the part closer to the installation position P than the hanging bolt 7 closest to the installation position P is the part near the installation position P of the connection object 5. .

As shown in FIGS. 4 and 5, the first engaging portion 21 is formed to have a length in contact with the bottom portion 11 in a state of being engaged with the lip portion 13 and extends in the Y direction (longitudinal direction of the joist 3). It has an arcuate shape when viewed in the longitudinal direction, and is configured to be elastically deformable. The second engaging portion 22 is an engagement guide that contacts the lip portion 13 and guides the second engaging portion 22 inward in the X direction (width direction) when engaged with the lip portion 13 from above. It has a face 23 . In addition, the joist mounting portion 16 is provided as a second engaging portion 22 with a second narrow engaging portion 22a (see FIG. 4), and a wide second engaging portion 22b (see FIG. 5) provided at a distance from the first engaging portion 21 corresponding to the second distance W2.

A connecting portion 25 is provided at the base portion 24 of the joist mounting portion 16 . The connecting portion 25 extends downward from the left end of the base portion 24 and is engaged in an inverted L shape extending leftward from the lower end. The first engaging portion 21 is connected to the distal end portion of the connecting portion 25 . The first engaging portion 21 includes an upper engaging portion 26 extending upward from the tip of the connecting portion 25 and a lower engaging portion 27 extending downward from the tip of the connecting portion 25 . and have. The lower engaging portion 27 is longer in the vertical direction than the upper engaging portion 26 and is thinner in the X direction. Therefore, the lower engaging portion 27 is configured to deform more easily than the upper engaging portion 26 .

Since the upper engaging portion 26 is formed in an arc shape in which the surface facing leftward is located on the right side toward the upper side, the upper engaging portion 26 is placed on the left lip portion when the cable support 6 is tilted to the left. 13 is easily engaged. From this engaged state, the cable support 6 is swung to the right so that it assumes the posture shown in FIGS. The first engaging portion 21 is deformed and sandwiched between the left lip portion 13 and the bottom portion 11 so that the first engaging portion 21 can be held in a state of being engaged with the left lip portion 13 .

The narrow second engaging portion 22a extends downward from the base portion 24 of the joist mounting portion 16 and extends rightward from the lower end thereof in an L shape. When the cable support 6 is attached to the narrow edge 3a as shown in FIG. By swinging the cable support 6 to the posture shown in FIG. On the other hand, an operation of pushing from above is performed. By performing such an operation, the right lip portion 13 in contact with the engagement guide surface 23 of the second engagement portion 22a for narrow width is once pushed to the right and then returned to the left, thereby The second engaging portion 22 a for the vehicle engages the right lip portion 13 . Thus, when the joist attachment portion 16 is attached to the narrow joist edge 3a, the first engaging portion 21 is engaged with the left lip portion 13, and the narrow second engaging portion 22a is attached to the right lip. It engages part 13 .

The wide second engaging portion 22b is formed in an L shape like the narrow second engaging portion 22a. 5, the cable support 6 is shown in FIG. 5 so that the upper engaging portion 26 is sandwiched between the left lip portion 13 and the bottom portion 11 when the cable support 6 is attached to the wide hem 3b. By swinging to the posture, the second engaging portion 22b for wide width is pushed into the right lip portion 13 from above. By performing such an operation, the right lip portion 13 in contact with the engagement guide surface 23 of the second engaging portion 22b for wide width is once pushed to the right side, and then returned to the left side. The second engaging portion 22b engages the lip portion 13 on the right side. In this way, when the joist mounting portion 16 is attached to the wide joist rim 3b, the second engaging portion 22b for wide use is attached to the right lip portion 13 while the first engaging portion 21 is engaged with the left lip portion 13. to engage.

As shown in FIGS. 3 to 5 , the joist mounting portion 16 has a projecting portion 28 projecting downward from the lower surface of the base portion 24 . The projecting portion 28 is formed in a shape narrower than the width of the base portion 24 in the Y direction, and is formed along the X direction. The projecting portion 28 is provided in a portion of the lower surface of the base portion 24 where the first engaging portion 21 and the second engaging portion 22 are not provided in the X direction. By providing the protruding portion 28 in this way, the strength of the ceiling joist mounting portion 16 is increased, and the second engaging portion 22 is engaged when the ceiling joist mounting portion 16 is attached to the ceiling joist 3. The projecting portion 28 is configured to come into contact with the right lip portion 13 from above.

The cable support portion 17 includes a U-shaped body portion 33 that is provided with a first wall portion 31 and a second wall portion 32 and opens upward, and a second wall portion 33 extending from the upper end of the first wall portion 31 to the second wall portion 32 . and a locking portion 34 projecting toward the wall portion 32 . The locking portion 34 is configured to be elastically deformable, and when the cable 4 is pressed against the locking portion 34 from above, the locking portion 34 is elastically deformed so that the distance between the locking portion 34 and the second wall portion 32 increases. Since it is deformable, by deforming the locking portion 34 in this way, the cable 4 can be pushed into the main body portion 33 from the opening of the main body portion 33 , and the cable 4 can be inserted through the main body portion 33 .

The connecting portion 18 includes a first plate portion 36 and a second plate portion 37 . Each of the first plate portion 36 and the second plate portion 37 has a lower end connected to the joist attachment portion 16 and an upper end connected to the cable support portion 17 . The first plate portion 36 is a plate-shaped member extending in the vertical direction and the Y direction, and the second plate portion 37 is a plate-shaped member extending in the vertical direction and the X direction. is connected to the central portion of the first plate portion 36 in the Y direction.

The connection portion 18 is formed with a through hole 38 through which a string material (not shown) such as a wire covered with vinyl can be inserted. In this embodiment, the through hole 38 is formed in the upper end portion of the second plate portion 37 in a state of penetrating in the Y direction. By tying the cord member inserted through the through hole 38 to the connection portion 18 together with the cable 4 supported by the cable support portion 17, the cable 4 can be held so as not to move in the Y direction. It has become.

Next, a procedure for installing the cable support structure 1 of the first embodiment will be described. In the cable support structure 1 of the first embodiment, first, as shown in FIG. Then, a cable support 6 is installed near the installation position P (see FIG. 1) of the connecting object 5 on the joist 3, and the cable 4 is supported by this cable support 6. As shown in FIG. Next, as shown in FIG. 1, a mat material 9 is installed on the upper side of the ceiling joists 3 . In this case, the mat material 9 is installed on the lower side of the cable 4 . After that, the ceiling material 2 is installed, a hole 2a is made at the installation position P in the ceiling material 2, and the cable 4 is connected to the connection object 5 in the ceiling space S using this hole 2a, and the connection object 5 is connected. Install at the installation position P.

[Second embodiment]
Next, a second embodiment of a cable support structure and a cable support according to the present invention will be described with reference to the drawings. A description of the configured parts is omitted.

As shown in FIG. 9 , the cable support portion 17 is provided above the ceiling joist mounting portion 16 and at a position adjacent to the ceiling ceiling mounting portion 16 . In this embodiment, the first wall portion 31 of the cable support portion 17 is configured by part of the base portion 24 of the joist mounting portion 16, and the cable support portion 6 does not include the connection portion 18, so that the cable support portion 17 is provided at a position less than a set distance from the joist mounting portion 16 , and the cable support portion 17 is positioned adjacent to the joist mounting portion 16 . A body portion 33 of the cable support portion 17 is provided on the cable support body 6 so as to have a U-shape having a first wall portion 31 and a second wall portion 32 and opening in the X direction.

In the cable support structure 1 of the second embodiment, first, as shown in FIG. 8 , the ceiling joist receiver 8 is suspended and supported by the suspension bolt 7 , and the ceiling joist receiver 8 supports the ceiling joist 3 . Then, a cable support 6 is installed near the installation position P (see FIG. 7) of the connecting object 5 on the joist 3, and the cable 4 is supported by this cable support 6. As shown in FIG. Next, as shown in FIG. 7, a mat material 9 is installed on the upper side of the ceiling joists 3 . In this case, the mat material 9 is placed above the cables 4 and the cable support 6 . After that, the ceiling material 2 is installed, a hole 2a is made at the installation position P in the ceiling material 2, and the cable 4 is connected to the connection object 5 in the ceiling space S using this hole 2a, and the connection object 5 is connected. Install at the installation position P.

[Another embodiment]
Another embodiment of the present invention will be described. It should be noted that the configuration of each embodiment described below is not limited to being applied alone, and can also be applied in combination with the configuration of other embodiments.

(1) In the above embodiment, the ceiling joist attachment portion 16 includes the first engaging portion 21 and the second engaging portion 22, and the ceiling joist attaching portion 16 is attached using the pair of lip portions 13 of the ceiling joist 3. The structure attached to the joists 3 has been described as an example. However, it is not limited to such a configuration. For example, the joist mounting portion 16 is provided with a clamping portion for clamping the lip portion 13, and the clamping portion clamps the lip portion 13 to attach the joist mounting portion 16 to the joist 3. You may change the structure attached to the joist 3 in 16 suitably.

(2) In the above-described embodiment, the first engaging portion 21 of the ceiling joist mounting portion 16 is formed to have a length contacting the bottom portion 11 of the ceiling joist 3 and has an arc shape. However, the shape of the first engagement portion 21 of the joist mounting portion 16 may be changed as appropriate. Similarly, the shape of the second engaging portion 22 of the joist mounting portion 16 may be changed as appropriate.

(3) In the above embodiment, the configuration in which the joist mounting portion 16 includes the narrow second engaging portion 22a and the wide second engaging portion 22b as the second engaging portions 22 has been described as an example. However, it is not limited to such a configuration. For example, the joist mounting portion 16 has only one of the narrow second engaging portion 22a and the wide second engaging portion 22b as the second engaging portion 22. good too.

(4) In the above embodiment, the configuration in which the second engaging portion 22 is provided with the engaging guide surface 23 has been described as an example. However, it is not limited to such a configuration. For example, the second engaging portion 22 may be configured without the engaging guide surface 23 .

1 cable support structure 2 ceiling material 3 joist 3a narrow width joist 3b wide joist 4 cable 5 connection object 6 cable support 11 bottom 12 wall 13 lip 16 joist attachment 17 cable support 21 first engagement Joining portion 22 Second engaging portion 22a Second engaging portion for narrow width 22b Second engaging portion for wide width 23 Engagement guide surface P Installation position S Ceiling space W1 First interval W2 Second interval

Claims (8)

A ceiling joist that supports a ceiling material, a connection object that is installed on the ceiling material and to which a cable is connected from the ceiling space, and a cable support that supports the cable,
The cable support includes a joist attachment portion that can be freely attached to the joist, and a cable support portion that supports the cable while attached to the joist at the joist attachment portion. The joist mounting portion is attached to a portion of the joist near the installation position of the connection object, and the cable is supported by the cable support portion near the installation position of the connection object. Cable installation structure. The joists comprise a bottom portion, a pair of wall portions extending upward from both sides in the width direction of the bottom portion, and a pair of wall portions projecting inward in the width direction from the upper end portions of each of the pair of wall portions. a lip portion;
2. The hoist attachment portion has a first engaging portion that engages with one of the pair of lip portions and a second engaging portion that engages with the other of the pair of lip portions. cable installation structure described in . The first engaging portion is formed to have a length in contact with the bottom portion in a state of being engaged with the lip portion, and has an arcuate shape along the longitudinal direction of the joist when viewed in the longitudinal direction, and is elastic. 3. The cable installation structure according to claim 2, which is configured to be deformable. As the joists, there is a narrow joist edge with a first interval between the pair of wall portions and a wide joist edge with a second interval where the interval between the pair of wall portions is wider than the first interval,
The joist mounting portion includes, as the second engaging portion, a second engaging portion for narrow width provided at an interval corresponding to the first interval with the first engaging portion, and the first 4. The cable installation structure according to claim 2 or 3, further comprising a second engaging portion for wide width provided at an interval corresponding to the second interval from the engaging portion. The second engaging portion includes an engaging guide surface that contacts the lip portion and guides the second engaging portion inward in the width direction when the second engaging portion is engaged with the lip portion from above. The cable installation structure according to any one of claims 2 to 4. The cable installation according to any one of claims 1 to 5, wherein the cable support portion is provided above the ceiling joist mounting portion and at a position separated from the ceiling mounting portion by a set distance or more. structure. 6. The cable installation structure according to any one of claims 1 to 5, wherein the cable supporting portion is provided on the upper side of the joist mounting portion and at a position adjacent to the joist mounting portion. . A joist mounting part that can be freely attached to the ceiling joist, and a cable support part that supports the cable installed in the space above the ceiling while being attached to the joist by the ceiling joist mounting part,
The joist mounting portion is configured to be freely attachable to any position in the longitudinal direction of the joist,
A cable support body in which the cable support portion is configured to freely support the cable while being attached to the joist at the joist attachment portion.

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