Wiring and piping protection ducts and wiring and piping protection duct devices

Abstract

To hold a lid on a base in a state where an opening of the base is open, during an operation in which a wiring / piping material is stored in the base and arranged along a structure.SOLUTION: A protection duct 10 includes: a base 20 in which an engaged part 25 is formed on a tip side of each of a pair of side walls 22, 22; and a lid 40 which includes an engaging part 44 engaging with the engaged part 25. A base side protrusion 30 is provided on each side wall 22 of the base 20, and a lid side protrusion 45 is provided on each of both side outer faces of the lid 40. The lid side protrusion 45 located on the other side in a width direction goes beyond the base side protrusion 30 in accordance with the rotation of the lid 40 to abut the base side protrusion 30 at an open position, and the engaged part 25 on the other side in the width direction and the engaging part 44 abut to each other at the open position, so that the lid 40 is maintained at the open position. Thus, during an operation in which a cable 60 is stored in the protection duct 10, the lid 40 at the open position can be prevented from falling carelessly from the base 20.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a wiring / piping material protection duct and a wiring / piping material protection duct device, which are constituted by a base fixed to a structure and a lid body assembled to the base, and in which an arrangement path for wiring / piping materials is formed inside.

Background Art

[0002] As this type of wiring / piping material protection duct, the one described in Patent Document 1 is known. As shown in FIG. 11, this cable protection cover, which is a wiring / piping material protection duct, consists of a base 71 fixed to a structure such as a ceiling surface, a wall surface, or a floor surface, and a cover body 72 which is a lid body fitted onto the base 71. Note that the reference numerals in FIG. 11 are changed from those in Patent Document 1 for convenience of description. In the base 71, side plate portions 74 are respectively integrally provided at both widthwise ends of a flat plate-shaped contact plate portion 73 fixed to a ceiling surface or the like. Further, from the distal end of each side plate portion 74, an extending plate portion 76 for forming an accommodation space 75 for a cable 60 between the extending plate portion 76 and the contact plate portion 73 extends toward the widthwise center of the contact plate portion 73 respectively, and an insertion port 77 consisting of an opening through which the cable 60 is inserted is provided between the distal ends of the respective extending plate portions 76. An engagement protrusion 78 is formed at the connecting portion between the side plate portion 74 and the extending plate portion 76 in a direction substantially perpendicular to the contact plate portion 73. At the distal ends of both extending plate portions 76, 76, there is respectively provided a drop-preventing plate portion 79 that is bent inward toward the accommodation space 75 to prevent the cable 60 accommodated in the accommodation space 75 from falling out of the insertion port 77.

[0003] The cover body 72 includes a cover body main portion 80 that abuts in close contact against the outer side of each of the pair of left and right extending plate portions 76 of the base 71, and a pair of side plate portions 81, 81 that abut in close contact against the outer side of the engagement protrusion 78 of the base 71. At the distal end of each side plate portion 81, there is provided an engagement protrusion 82 that is integrally molded inward in an acute angle shape and engages with the engagement protrusion 78 of the base 71.

[0004] To use this cable protection cover 70 to house and protect the cable 60 that supplies power to a lighting device installed on the ceiling, the contact plate portion 73 of the base 71 is fixed to the ceiling using fixing nails, the cable 60 is inserted through the insertion opening 77 of the base 71 and housed in the housing space 75, and then the cover body 72 is fitted onto the base 71.

[0005] In this process, to facilitate the fitting of the cover body 72, it is desirable to first suspend the cover body 72 vertically by engaging only the engaging projection 82 at one end of the cover body 72 in the width direction with the engaging projection 78 at one end of the base 71, and then, after housing the cable 60 in the storage space 75 of the base 71 in this state, rotate the cover body 72 inward around the engaging projection 82 at one end of the cover body 72 as an axis, so that the engaging projection 82 at the other end engages with the engaging projection 78 at the other end of the base 71. This makes the fitting of the cover body 72 easier and is therefore desirable. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2002-051428 [Overview of the project] [Problems that the invention aims to solve]

[0007] As mentioned above, in the cable protection cover 70 described in Patent Document 1, it is desirable to suspend the cover body 72 by hooking the engaging projection 82 at one end of the cover body 72 onto the engaging projection 78 at one end of the base 71 during the process of fitting the cover body 72 onto the base 71 fixed to the ceiling surface. However, since the engaging projection 82 at one end of the cover body 72 is simply hooked onto the engaging projection 78 at one end of the base 71, if the cover body 72 is bumped or vibrated during the process of housing the cable 60 in the cable protection cover 70, the cover body 72 can easily detach from the base 71 and fall.

[0008] Furthermore, the cable protection cover 70 required removing the cover body 72 from the base 71, and then hooking the engaging projection 82 at one end onto the engaging projection 78 at the other end of the base 71 to suspend it, which was cumbersome. In addition, when the cable protection cover 70 is installed on a wall or floor, it was not possible to suspend the cover body 72 by hooking the engaging projection 82 at one end of the cover body 72 onto the engaging projection 78 at one end of the base 71 during the fitting process of the cover body 72.

[0009] Therefore, the present invention aims to provide a wiring and piping material protection duct and a wiring and piping material protection duct device that can hold the lid in place on the base with the opening of the base open during the work of housing wiring and piping materials inside the base and arranging them along a structure. [Means for solving the problem]

[0010] The wiring and piping material protection duct according to claim 1 comprises a base comprising a bottom wall and a pair of side walls erected from both sides of the bottom wall in the width direction opposite to the width direction perpendicular to the longitudinal direction, with an opening formed between the tip sides of the pair of side walls that allows the installation path to face the outside, A lid comprising a pair of engaging portions that engage with engaging portions formed on the tip ends of the pair of side walls, and assembled to the base by the engagement of the engaging portions so as to be mounted on the tip ends of the pair of side walls in the closed position that closes the opening, thereby forming a hollow cylindrical shape with the base, By disengaging the engaged portion from the engaged portion on one side in the width direction and rotating the lid around the other side in the width direction as an axis, it is possible to move the lid, which is assembled in the closed position, to an open position with the opening opened so that the installation path faces the outside. Each of the pair of side walls of the base is provided with a base-side projection that protrudes in the direction in which the side walls are erected. On both outer surfaces in the width direction of the lid, there are lid-side protrusions that project outward in the width direction. The lid-side projection located on the other side in the width direction moves beyond the base-side projection as the lid rotates, and when the lid is positioned in the open position, the lid-side projection and the base-side projection come into contact with each other, preventing the lid from rotating in the reverse direction toward the closed position. At the same time, the engaged portion and the engaging portion on the other side in the width direction come into contact with each other when the lid is positioned in the open position, preventing the lid from rotating any further, thereby maintaining the lid in the open position.

[0011] As a result, when the lid is moved to the open position where the opening of the base is open, the protrusion on the lid side and the protrusion on the base side come into contact with each other and engage, and the engaged part of the base and the engaged part of the lid come into contact and engage, holding the lid in the open position. Furthermore, the protrusion on the lid side serves as a finger grip during rotation, preventing the finger from slipping on the outer surface of the engagement part and making rotation easier. In addition, the lid can be rotated using either of the pair of engaging parts on the base as the axis, and because it opens from both sides, it has no directionality in the width direction and offers flexibility in its installation position.

[0012] The wiring and piping protection duct according to claim 2 is such that the cover can be assembled in the closed position and the cover can be maintained in the open position regardless of whether the base is oriented with the opening facing upward, downward, or to the side perpendicular to the vertical direction. This provides flexibility in the orientation of the base during installation.

[0013] The wiring and piping material protection duct according to claim 3 is further characterized in that the engaged portion of the base comprises an open portion that is opened outward in the width direction of the base, a first plate portion located on the bottom wall side and a second plate portion located opposite the bottom wall side, an allowable space is formed behind the open portion that communicates with the open portion and allows the engaging portion to enter as it rotates, the base side protrusion is formed on the first plate portion, the engaging portion of the cover engages with the second plate portion in the closed position, the pair of side walls are tiltable inward by external pressure, and the engagement between the pair of engaged portions and the pair of engaging portions is released by the tilting. This allows the base and the lid to be easily separated by tilting the side walls of the base, thereby releasing the engagements on both sides in the width direction. Furthermore, by tilting one side wall of the base to disengage only one side while keeping the other engaged, preparation for rotation can be easily performed, allowing the lid to immediately begin rotating from the assembled closed position towards the open position.

[0014] In particular, the wiring and piping material protection duct of claim 4 is such that, in the closed position, the entire cover is contained inward from the outer surfaces of both sides in the width direction of the pair of side walls, and in the open position, the entire cover does not protrude beyond the outer surface of the other side of the side wall in the width direction. As a result, the lid is maintained in both the closed and open positions within its width, so that it is not obstructed even if there are obstacles next to the wiring and piping protection duct.

[0015] In particular, the wiring and piping material protection duct of claim 5 is such that the engaged portion and the engaged portion on the other side in the width direction abut each other so as to restrict the longitudinal movement of the lid due to its own weight when it is moved to the open position with respect to a base whose longitudinal direction is vertical. This allows for installation of wiring and piping protection ducts in a vertical direction.

[0016] The wiring and piping material protection duct device of claim 6 is a device of claims 1 to Claim 3The present invention comprises a wiring and piping material protection duct as described above, and a columnar duct support having a long, continuous groove formed in the longitudinal direction, wherein the bottom wall of the base of the wiring and piping material protection duct has a fixing portion for being inserted into the groove of the duct support and fixed to the duct support, the distance between the outer surfaces of a pair of opposing side walls which is the width of the wiring and piping material protection duct is the same as or narrower than the width in the direction intersecting the direction in which the groove of the duct support extends, the wiring and piping material protection duct can be fixed without protruding outward in the width direction of the duct support, and the cover in the open position is maintained in the open position without protruding outward in the width direction of the duct support. As a result, the width of the wiring and piping protection duct is within the width of the duct support, making it possible to install the wiring and piping protection duct even if there are obstacles next to the duct support. [Effects of the Invention]

[0017] The invention of claim 1 is such that as the engaged portion on the other side in the width direction of the lid rotates to the open position, the lid-side protrusion overcomes the base-side protrusion, causing the lid-side protrusion and the base-side protrusion to come into contact with each other, thereby restricting the lid from rotating in the opposite direction to the closed position. Furthermore, the engaged portion of the base and the engaged portion of the lid come into contact with each other in the open position, restricting any further excessive rotation of the lid, so that the lid is stably maintained in the open position. For this reason, during the work of housing wiring and piping materials inside the wiring and piping material protection duct, the lid in the open position does not fall unintentionally and is held in a temporarily assembled state. As a result, when housing wiring and piping materials inside the wiring and piping material protection duct and closing the lid, the lid can be closed immediately after housing the wiring and piping materials inside the base, improving work efficiency.

[0018] Furthermore, since the lid remains in the open position, there is flexibility in the orientation of the base during installation. Even when the base is installed with the opening facing upwards, downwards, or to the side, or when the wiring / piping protection duct is installed vertically, the lid can be kept in the open position. After the wiring / piping is placed inside the base, the lid can be closed immediately, allowing for efficient work.

[0019] Furthermore, during the work of accommodating wires and piping materials in the base, the cover body is in a temporarily assembled state on the base, so it will not be lost. In addition, during work, the cover body is temporarily assembled to the base, so there is no need to worry about finding a place to put the cover body during this period. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] [Figure 1] It is an exploded perspective view of the wire and piping material protection duct according to an embodiment of the present invention. [Figure 2] It is an exploded front view of the wire and piping material protection duct of Fig. 1. [Figure 3] (a) is a perspective view of the wire and piping material protection duct in which the base and the cover body of Fig. 1 are assembled, and (b) is a front view thereof. [Figure 4] It is a perspective view of a base obtained by expanding the lateral hole of the base of Fig. 3. [Figure 5] It is an exploded perspective view of the wire and piping material protection duct device according to an embodiment of the present invention. [Figure 6] It is an exploded front view of the wire and piping material protection duct device of Fig. 5. [Figure 7] (a) is a perspective view of the wire and piping material protection duct of Fig. 5 fixed to a duct support, and (b) is a front view thereof. [Figure 8] It is a front view showing a state where one side wall of the base of Fig. 7 is pressed. [Figure 9] It is a front view showing a state where the cover body of Fig. 7 is rotated to an open position. [Figure 10] Also, it is a front view showing a state where the cover body of Fig. 7 is rotated to an open position. [Figure 11] It is a cross-sectional view of a conventional wire and piping material protection duct. MODES FOR CARRYING OUT THE INVENTION

[0021] Hereinafter, the wire and piping material protection duct and the wire and piping material protection duct device according to an embodiment of the present invention will be described with reference to the drawings. A wiring and piping protection duct (hereinafter simply referred to as "protection duct") consists of a base fixed to a structure and a cover assembled to the base, and houses and protects wiring and piping materials inside. Structures on which the protection duct is installed include stands and protective frames for precision machinery, etc. In this embodiment, it is shown to be installed on a duct support which is a stand for precision machinery, etc. Cables are shown as wiring and piping materials. In the following description, the vertical direction in Figure 1 will be described as the vertical direction of each component.

[0022] In Figures 1 to 4, the base 20 of the protective duct 10 is made of a long, roughly U-shaped plate with a constant cross-section, and comprises a bottom wall 21 and a pair of side walls 22, 22 that are erected from both ends of the bottom wall 21 in the width direction opposite to the longitudinal direction, and an opening 24 is formed between the ends of the pair of side walls 22, 22, which faces outward, and the routing path 23, which is an internal space in which the cable 60 is arranged and housed. The base 20 of the protective duct 10 has a symmetrical shape and is integrally formed from a synthetic resin material or the like. Each side wall 22 is elastically tiltable inward when pressed from the outside.

[0023] A pair of side walls 22, 22 each have an engaging portion 25 formed on their tip side. As shown in Figure 3(b), the engaging portion 25 includes an opening portion 26 that opens outward in the width direction of the base 20, a curved plate-shaped first plate portion 27 located on the bottom wall 21 side with the opening portion 26 in between, and a second plate portion 28 located on the opposite side of the bottom wall 21, with the base 20's placement path 23 side being convex and protruding into the placement path 23, and a second plate portion 28 located on the opposite side of the bottom wall 21. Between the first plate portion 27 and the second plate portion 28, there is an allowable space 29 that communicates with the opening portion 26 and allows the engaging portion 44 of the lid 40, which will be described later, to enter as it rotates. The second plate portion 28 has an outer contact surface 28a on its upper surface that abuts against the inner surface of the lid 40, and an outer contact surface 28b on its opposite side that faces the allowable space 29 and abuts against the tip of the engaging portion 44 of the lid 40, with a circular bulge 28c formed on the tip.

[0024] Furthermore, each of the pair of side walls 22, 22 is provided with a base-side projection 30 that protrudes in the direction in which the side wall 22 is erected, and is continuously provided in the longitudinal direction. The base-side projection 30 is formed at the boundary between the first plate portion 27 of the engaged portion 25 and the upper end of the side wall 22, and the outer surface facing the open portion 26 is a substantially arc-shaped contact curved surface 30a.

[0025] As shown in Figure 1, each side wall 22 has multiple rectangular lateral holes 31 provided at equal intervals along its longitudinal direction. The lateral holes 31 are holes for pulling out cables 60 housed in the protective duct 10 to the outside. A notch 31a is provided in the center of the upper edge of each lateral hole 31 to partially or completely enlarge the lateral hole 31 by cutting a portion of the side wall 22. In addition, a V-groove 32 is formed along the longitudinal direction on the inner surface of the lower part of each side wall 22. This V-groove 32 serves as a cutting groove when partially or completely enlarging the lateral hole 31. As shown in Figure 4, a large pull-out opening can also be formed in the side wall 22 by cutting a portion of the side wall 22 across multiple lateral holes 31. Note that the lateral holes 31 are not limited to this shape and are not necessarily required.

[0026] On the outer surface of the central part in the width direction of the bottom wall 21, a fixing portion 33 is continuously provided in the longitudinal direction, consisting of a pair of elastic projections 34, 34: a left-side elastic projection 34a with a constant cross-section and a roughly V-shaped plate-like cross-section, and a right-side elastic projection 34b with an asymmetrical shape. The pair of elastic projections 34, 34 can be elastically bent horizontally inward with the joint of the bottom wall 21 as their base end when pressed from the outside. The fixing portion 33 is inserted into and fixed in a groove 55 of the duct support 50, which will be described later.

[0027] On the other hand, the cover 40 of the protective duct 10 consists of a long, plate-shaped body with a constant cross-section, and comprises a flat plate-shaped cover body 41 and a pair of opposing flanges 42, 42 extending from both ends in the width direction perpendicular to the longitudinal direction of the cover body 41. A thickened portion 43 for preventing warping is formed on the inner surface of the cover body 41. The cover 40 has a symmetrical shape and is integrally formed from a synthetic resin material or the like.

[0028] The pair of flanges 42, 42 of the lid 40 are curved plate-shaped with the outer side convex and the tip facing inward, and a pair of engaging portions 44, 44 are formed thereon that engage with a pair of engaged portions 25, 25 of the base 20. The engaging portions 44 are inserted from the release portion 26 of the engaged portion 25 of the base 20 as the lid 40 rotates as described later, enter the allowable space 29, and engage with the engaged portion 25. Furthermore, a lid-side projection 45 is provided longitudinally on the outer surface of the flange 42 of the lid 40 near the boundary with the lid body 41, projecting outward in the width direction of the lid 40. The cross-section of the lid-side projection 45 is formed in a substantially semicircular shape. The area from the lid-side projection 45 to the tip on the outer surface of the engaging portion 44 is a contact sliding surface 44a that contacts and slides on the contact curved surface 30a of the base-side projection 30.

[0029] The cover 40 is assembled to the base 20 by engaging the engaged portion 25 and the engaged portion 44 so that it is mounted on the tip side of the pair of side walls 22, 22 of the base 20 in the closed position that closes the opening 24 of the base 20, and together with the base 20 the protective duct 10 is formed in a hollow cylindrical shape.

[0030] The lid 40 can be moved from a closed position, where the opening 24 of the base 20 is closed, to an open position, where the opening 24 is opened so that the installation path 23 faces the outside, by releasing the engagement between the engaged portion 25 of the base 20 and the engaged portion 44 of the lid 40 on one side in the width direction, and rotating it around the other side in the width direction as an axis.

[0031] When the lid 40 is positioned in the closed position to close the opening 24 of the base 20, the entire lid 40 fits inside the outer surfaces of both sides in the width direction of the side walls 22 of the base 20, and when the lid 40 is positioned in the open position, the entire lid does not protrude beyond the outer surface of the other side of the side wall 22 of the base 20 in the width direction.

[0032] In this embodiment, the protective duct 10 configured in this way is fixed to the duct support 50. Figures 5 to 7 show a wiring and piping material protection duct device (hereinafter simply referred to as the "protection duct device") consisting of a protective duct 10 and a duct support 50. In Figures 5 and 6, the duct support 50 is a long rectangular prism shape and is formed in a constant cross-sectional shape in the longitudinal direction by extrusion molding of aluminum or the like. In the internal space of the duct support 50 of this embodiment, the central part 51 of the outer rectangular surface is located in the center, and this is held by connecting plate parts 52 extending from the four corners, so that the whole is symmetrical in the vertical and horizontal directions. A groove opening 54 is formed in the widthwise center of each of the four outer walls 53, and groove parts 55 that are continuous in the longitudinal direction are formed in four places surrounded by the central part 51, the connecting plate parts 52 and the outer walls 53. Since the duct support 50 is symmetrical in the vertical and horizontal directions, it can be installed regardless of which direction each outer wall 53 is facing.

[0033] A fixing portion 33, consisting of a pair of elastic projections 34, 34 that are continuously provided longitudinally on the bottom wall 21 of the base 20, is inserted from the outside into each groove 55. After the fixing portion 33 is inserted into the groove 55 of the duct support 50, each elastic projection 34 elastically expands outward and presses against the left and right edges of the groove opening 54, thereby holding and fixing the protective duct 10 to the duct support 50. The fixing portion 33 of the protective duct 10 can be inserted into and fixed to any of the four grooves 55 of the duct support 50.

[0034] Here, the distance between the outer surfaces of the opposing pair of side walls 22, 22 of the protective duct 10 is the same as or narrower than the width in the direction intersecting the direction in which the groove 55 of the duct support 50 extends, so that it can be fixed without protruding outwards in the width direction of the duct support 50. Furthermore, when the lid 40 is positioned in the open position, it is maintained in the open position without protruding outward in the width direction of the duct support 50.

[0035] Next, a method for housing and arranging the cable 60 inside the protective duct 10 using the protective duct device 1 configured in this way will be described. First, with the opening 24 of the base 20 facing upwards, the cover 40 is placed over the base 20 from above to close the opening 24. At this time, the distance between the tips of the pair of engaging parts 44, 44 on the left and right of the cover 40 is smaller than the distance between the outer ends of the pair of engaged parts 25, 25 on the left and right of the base 20. However, if the cover 40 is pushed vertically downwards, each side wall 22 of the base 20 will elastically bend inwards, narrowing the distance between the outer ends of the pair of engaged parts 25, 25 of the base 20. The tips of each engaging part 44 of the cover 40 will then be lower than the bulging part 28c of the engaged part 25 of the base 20, and the engaged part 25 and the engaging part 44 will engage as shown in Figure 3. As a result, the cover 40 is assembled to the base 20 so that it is mounted on the tip side of the pair of side walls 22, 22 of the base 20.

[0036] After assembly, the entire cover 40 is positioned inward from the outer surfaces of both sides in the width direction of the pair of side walls 22, 22 of the base 20. Alternatively, when placing the cover 40, the side walls 22 of the base 20 may be pressed from the outside to tilt them inward during assembly. In this case, the pressure narrows the gap between the outer ends of the engaged portion 25 of the base 20, making it easier to push the cover 40 down. After the cover 40 is assembled to the base 20, the protective duct 10 is configured as a hollow cylinder.

[0037] By attaching the lid 40 to the base 20 in advance in this way, it is possible to prevent foreign matter and dust from entering the protective duct 10 before the storage work, and it is also easy to transport the protective duct 10 to the work site.

[0038] Next, as shown in Figures 5 to 7, the protective duct 10, with the base 20 and cover 40 assembled, is fixed to the duct support 50. At this time, the protective duct 10 is simply pushed down toward the duct support 50, and the fixing portion 33 of the base 20 is pushed into the groove 55 of the duct support 50. The pair of elastic projections 34, 34 are pressed against the edge of the groove opening 54 of the duct support 50 at the top of their angled ends, causing them to bend inward and be inserted into the groove opening 54. After insertion, they expand outward and are held within the groove 55.

[0039] Next, on one side of the protective duct 10 in the width direction, as shown in Figure 8, the engagement between the engaged portion 25 and the engaging portion 44 is released by pressing the side wall 22 of the base 20 from the outside and tilting it inward. Then, as shown in Figure 9, the lid 40 is rotated around the shaft of the engaged portion 25 on the other side in the width direction, so that the engaging portion 44 moves relative to it and its tip enters the allowable space 29 of the engaged portion 25. The lid 40, which was assembled in the closed position, is moved to an open position with the opening 24 open so that the routing path 23 inside the protective duct 10 faces the outside, without separating it from the base 20.

[0040] Furthermore, the lid-side projection 45 located on the other side in the width direction of the lid 40 is moved until it overcomes the base-side projection 30 of the base 20 as the lid 40 rotates, so that when the lid 40 is positioned in the open position, the lid-side projection 45 and the base-side projection 30 come into contact with each other. This prevents the lid 40 from rotating in the reverse direction to the closed position, that is, from returning to its original closed position.

[0041] At the same time, the engaged portion 25 on the other side in the width direction of the base 20 and the engaged portion 44 of the lid 40 are brought into contact with each other when the lid 40 is positioned in the open position. This restricts the lid 40 from rotating excessively beyond the state when it is positioned in the open position. Specifically, as shown in Figure 10, the tip of the engaged portion 44 of the lid 40 comes into contact with the abutment surface 28b and bulging portion 28c of the second plate portion 28 of the engaged portion 25 at the back of the allowable space 29, thereby preventing the lid 40 from protruding to the other side, i.e., to the right and outward in Figure 10, beyond the vertical line V shown by the dashed line along the outer surface of the other side wall 22 in the width direction.

[0042] These restrictions ensure that the cover 40 is held and maintained in a nearly constant open position, that is, in a nearly vertical upright position between the open position shown in Figure 9 and the open position shown in Figure 10.

[0043] Next, the cable 60 is inserted and housed in the routing path 23 of the protective duct 10 through the opening 24 of the base 20. At this time, naturally, if the lid 40 is rotated on the engaging portion 25 on the side opposite to the side where the worker is standing in the width direction and held in the open position, the upright lid 40 will not get in the way and the work will be easier.

[0044] Furthermore, if part or all of the cable 60 housed inside the protective duct 10 needs to be routed outside the protective duct 10 midway along its length, it can be routed through the lateral holes 31 in the side wall 22 of the base 20. In this case, if the cable 60 is too large in diameter to be routed through a single lateral hole 31, the lateral hole 31 can be enlarged beforehand by cutting a portion of the side wall 22, as shown in Figure 4.

[0045] Once the cable 60 is housed inside the base 20, the cover 40 is rotated back to its original closed position, allowing the base-side protrusion 30 of the engaged portion 25 on the other side of the base 20 to move over the cover-side protrusion 45 of the engaging portion 44 on the other side of the cover 40 in the width direction, thereby releasing the contact between the cover-side protrusion 45 and the base-side protrusion 30. The engaging portion 44 on one side of the cover 40 in the width direction is then engaged with the engaged portion 25 on the other side of the base 20 in the width direction, closing the opening 24. This completes the process of housing the cable 60 inside the protective duct 10.

[0046] In the above procedure, the cover 40 is pre-assembled to the base 20 in the closed position, then rotated to hold it in the open position, and the cable 60 is housed inside the protective duct 10. This prevents foreign matter and dust from entering the protective duct 10 until immediately before the house-in operation. Alternatively, the base 20 and cover 40 can be brought to the work site separately, and the cover 40 can be assembled at the site in the open position from the beginning before the cable 60 is housed inside the protective duct 10. In this case, the operation of releasing the engagement on one side in the width direction of the cover 40, which is assembled to the base 20 in the closed position as described above, and then rotating it towards the open position can be omitted, and the cable 60 can be immediately inserted and housed inside the protective duct 10.

[0047] Furthermore, in the above procedure, the protective duct 10 is fixed to the duct support 50, and then the cover 40 is operated to maintain it in the open position, and the cable 60 is housed inside the protective duct 10. However, it is also possible to house the cable 60 inside the protective duct 10 first, without fixing it to the duct support 50, and then fix the protective duct 10 to the duct support 50.

[0048] Next, the operation of the protective duct 10 and protective duct device 1 of this embodiment will be explained. As the protective duct 10 rotates the lid 40 from the closed position to the open position, the lid-side projection 45 on the other side in the width direction moves beyond the base-side projection 30, and in the open position, the lid-side projection 45 and the base-side projection 30 come into contact with each other, restricting the lid 40 from rotating in the reverse direction toward the closed position. At the same time, the engaged portion 25 of the base 20 on the other side in the width direction and the engaged portion 44 of the lid 40 come into contact with each other in the open position, restricting the lid 40 from rotating beyond the vertically upright position of the open position. As a result, the lid 40 is stably maintained in the open position. This prevents the lid 40, held in the open position, from being bumped during work or from inadvertently detaching from the base 20 and falling due to vibration or the like. As a result, after housing the cable 60 inside the protective duct 10, the lid 40 can be immediately rotated from the open position towards the closed position without having to retrieve the lid 40, and the opening 24 can be closed by engaging it with the engaging portion 25 of the base 20 on one side in the width direction. This makes it easier to attach the lid 40 to the base 20 when housing the cable 60.

[0049] Furthermore, since the cover 40 is maintained in the open position, there is flexibility in the orientation of the base 20 when it is installed. Even when the protective duct 10 is installed with the opening 24 of the base 20 facing downwards, to the side, etc., the cover 40 can be stably maintained in the open position. After housing the cable 60 inside the base 20, the cover 40 can be closed immediately, improving work efficiency.

[0050] Furthermore, in the closed position, the entire cover 40 fits inward from both outer surfaces in the width direction of the side walls 22 of the base 20, and in the open position, it does not protrude beyond the outer surface of the other side wall 22 of the base 20 in the width direction. This prevents obstructions from interfering with the protective duct device 1, prevents it from getting in the way of work, and prevents the cover 40 from rotating excessively and hitting obstacles next to the protective duct 10, thereby damaging the outer surface of the cover body 41.

[0051] Furthermore, the width of the protective duct 10, that is, the distance between the outer surfaces of the opposing pair of side walls 22, 22, is the same as or smaller than the width in the direction intersecting the direction in which the groove 55 of the duct support 50 extends, so that it can be fixed without protruding outward in the width direction of the duct support 50, and the cover 40, when in the open position, is maintained in that open position without protruding outward in the width direction of the duct support 50, so that the protective duct 10 can be installed even if there is an obstacle next to the duct support 50.

[0052] Furthermore, since the cover 40 is temporarily attached to the base 20 during the cable 60 installation process, there is no risk of losing the cover 40. In addition, since the cover 40 is temporarily attached to the base 20 during the cable 60 installation process, there is no need to worry about where to store the cover 40 during that time.

[0053] In addition, the protective duct 10 is a double-opening type that can be rotated on either side in the width direction of the cover 40, so it has no directional orientation and offers flexibility in the installation position of the protective duct 10.

[0054] Furthermore, the protective duct 10 can be easily separated from the base 20 and the cover 40 by tilting the side walls 22, 22 of the base 20 to release the engagement on both sides in the width direction.

[0055] Furthermore, the protrusion 45 on the lid side serves as a finger grip during rotation, making it easy to hold with your fingers and preventing slippage, thus facilitating rotation.

[0056] In the above embodiment, the case where the opening 24 of the base 20 faces upward is shown. However, in this embodiment, the protective duct 10 can be assembled with the cover 40 in the closed position and the cover 40 can be maintained in the open position even when the opening 24 of the base 20 faces downward or to the side perpendicular to the vertical direction. This provides flexibility in the installation orientation of the base 20.

[0057] Furthermore, although the above embodiment shows the base 20 with its longitudinal direction oriented horizontally, the protective duct 10 of the present invention can also be adapted to accommodate a base 20 with its longitudinal direction oriented vertically. In this case, the engaged portion 25 and the engaged portion 44 on the other side in the width direction of the protective duct 10 come into contact with each other so as to prevent the lid 40, which is positioned in the open position, from sliding downward in the longitudinal direction due to its own weight and falling.

[0058] Based on these considerations, the protective duct 10 can be installed on various structures such as frames and protective structures for precision machinery, as well as on the ceilings, walls, and floors of buildings.

[0059] Incidentally, when implementing the present invention, the base 20 and the cover 40 are not limited to the shapes and configurations shown in the above embodiment, including the engaged portion 25, the engaging portion 44, the base-side protrusion 30, and the cover-side protrusion 45. Furthermore, the duct support 50 is not limited to the shape shown in the above embodiment.

[0060] In addition, in the above embodiment, the protective duct 10 is fixed by inserting a fixing portion 33, which consists of an elastic projection 34 provided on the bottom wall 21 of the base 20, into a groove 55 of the duct support 50. However, the fixing of the protective duct 10 to the duct support 50 is not limited to this configuration or means.

[0061] Furthermore, although the protective duct 10 is fixed to the duct support 50 by the fixing part 33, when fixing the protective duct 10 to the ceiling, wall, floor, etc. of a building, the fixing part 33 as in this embodiment is not provided, and it can be fixed to the ceiling, etc., for example using nails.

[0062] In addition, the protective duct 10 in the above embodiment allows the base 10 to be installed even when the opening 24 of the base 20 is oriented upward, downward, or to the side perpendicular to the vertical direction. Conversely, the protective duct 10 may be installed in a state where it opens in only one or two specific directions among upward, downward, and to the side perpendicular to the vertical direction.

[0063] In the above embodiment, the entire lid 40 is positioned inward from the outer surfaces of both sides of the side walls 22 in the width direction when closed, and does not protrude beyond the outer surface of the other side of the side wall 22 in the width direction when open. However, if there are no obstacles next to or far from the protective duct 10 or duct support 50 and it does not pose any particular problem, the entire lid 40 may protrude to some extent from the outer surfaces of both sides of the side walls 22 in the width direction when closed, or protrude to some extent beyond the outer surface of the other side of the side wall 22 in the width direction when open.

[0064] Furthermore, in the above embodiment, the distance between the outer surfaces of the opposing pair of side walls 22, 22 of the protective duct 10 is the same as or narrower than the width of the duct support 50, and it can be fixed without protruding outward in the width direction of the duct support 50, and the lid 40 in the open position is maintained in the open position without protruding outward in the width direction of the duct support 50. However, if there is no particular problem, the distance between the outer surfaces of the pair of side walls 22, 22 may be slightly wider than the width of the duct support 50, and the lid 40 in the open position may protrude slightly outward in the width direction of the duct support 50.

[0065] In addition, the side walls 22 of the base 20 do not necessarily have to be elastically flexible and tiltable inward when pressed from the outside.

[0066] In the above embodiment, the wiring and piping material refers to the cable 60, but the protective duct 10 can also accommodate and protect other wiring and piping materials. [Explanation of symbols]

[0067] 1: Protective duct device, 10: Protective duct, 20: Base, 21: Bottom wall, 22: Side wall, 23: Installation route, 24: Opening, 25: Engaged part, 26: Release part, 27: First plate part, 28: Second plate part, 29: Allowable space, 30: Base side protrusion, 33: Fixing part, 40: Cover, 41: Cover body, 44: Engaged part, 45: Cover side protrusion, 50: Duct support, 55: Groove part, 60: Cable.

Claims

1. A wiring and piping protection duct that forms a route for arranging wiring and piping materials that are continuous in the longitudinal direction inside, A base comprising a bottom wall and a pair of side walls erected from both sides of the bottom wall in the width direction, facing each other in the width direction perpendicular to the longitudinal direction, with an opening formed between the tip sides of the pair of side walls that allows the installation path to face the outside, A lid comprising a pair of engaging portions that engage with engaging portions formed on the tip ends of the pair of side walls, and assembled to the base by the engagement of the engaging portions so as to be mounted on the tip ends of the pair of side walls in the closed position that closes the opening, thereby forming a hollow cylindrical shape with the base, By disengaging the engaged portion from the engaged portion on one side in the width direction and rotating the lid around the other side in the width direction as an axis, it is possible to move the lid, which is assembled in the closed position, to an open position with the opening opened so that the installation path faces the outside. Each of the pair of side walls of the base is provided with a base-side projection that protrudes in the direction in which the side walls are erected. On both outer surfaces in the width direction of the lid, there are lid-side protrusions that project outward in the width direction. A wiring and piping protection duct characterized in that the lid-side projection located on the other side in the width direction moves beyond the base-side projection as the lid rotates, the lid-side projection and the base-side projection come into contact with each other when the lid is positioned in the open position, restricting the lid from rotating in the reverse direction toward the closed position, and the engaged portion and the engaging portion on the other side in the width direction come into contact with each other when the lid is positioned in the open position, restricting any further excessive rotation of the lid and maintaining the lid in the open position.

2. The wiring and piping material protection duct according to claim 1, characterized in that the lid can be assembled in the closed position and the lid can be maintained in the open position even when the base is positioned with the opening facing in any of at least two directions from upward, downward, and to the side perpendicular to the vertical direction.

3. The engaged portion of the base comprises an open portion that is open outward in the width direction of the base, a first plate portion located on the bottom wall side and a second plate portion located opposite the bottom wall side, communicating with the open portion and forming an allowable space behind it that allows the engaged portion to enter during rotation, and the base-side protrusion is formed on the first plate portion. In the closed position, the engaging portion of the lid engages with the second plate portion. The wiring and piping material protection duct according to claim 1, characterized in that the pair of side walls can be tilted inward by external pressure, and the engagement between the pair of engaged portions and the pair of engaging portions is released by the tilting.

4. In the closed position, the entire lid is positioned inward from the outer surfaces of both sides in the width direction of the pair of side walls. The wiring and piping material protection duct according to any one of claims 1 to 3, characterized in that, in the open position, the entire cover does not protrude beyond the outer surface of the other side wall in the width direction.

5. The wiring and piping material protection duct according to any one of claims 1 to 3, characterized in that, with respect to the base whose longitudinal direction is the vertical direction, the engaged portion and the engaged portion on the other side in the width direction are in contact with each other so as to restrict the displacement movement in the longitudinal direction due to the weight of the lid when it is moved to the open position.

6. A wiring and piping material protection duct device comprising a wiring and piping material protection duct according to claims 1 to 3, and a columnar duct support having a long shape and a groove formed therein that is continuous in the longitudinal direction, The bottom wall of the base of the aforementioned wiring and piping material protection duct has a fixing portion that is inserted into the groove of the duct support and fixed to the duct support. The width of the wiring and piping protection duct is the same as or narrower than the width of the duct support, and the wiring and piping protection duct can be fixed without protruding outwards in the width direction of the duct support. A wiring and piping material protection duct device characterized in that the cover, when in the open position, is maintained in the open position without protruding outward in the width direction of the duct support.

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