JP7817128B2 - Curved path forming member, curved path forming device, inside corner area path forming member, and installation structure of curved path forming device - Google Patents

Description

This invention relates to a curved path forming member, a curved path forming device, an inside corner area path forming member, and an installation structure for a curved path forming device that form a path leading into a wall hole in an inside corner area.

Conventionally, there has been a bent portion protective cover that houses and protects the bent portion of piping material that passes through a wall hole and is pulled out to the wall surface and runs along the wall surface (see, for example, Patent Document 1). As shown in Figure 20, this protective cover 12 consists of a base 13 that is fixed to the wall surface (not shown) and a lid 14 that is attached to the base 13. Here, the base 13 has a flat base 13a, which has a through-hole 13b that faces the wall hole in the wall surface and through which the piping material passes. In addition, the base 13a has a V-shaped groove 13c and a flange 13d on both sides, and the flange 13d can be removed by cutting the base 13a at the V-shaped groove 13c.

Japanese Patent Application Laid-Open No. 2021-116865

However, with the conventional protective cover 12, if the wall hole in the wall surface is located close enough to the corner of the recessed corner area, even if the flange portion 13d on the base 13 is removed, it will interfere with the other wall surface that forms the recessed corner area, making it impossible to install the protective cover 12 or making installation difficult.

This invention was made to solve the above-mentioned drawbacks of the conventional technology, and its purpose is to provide a curved path forming member, a curved path forming device, an inside corner area path forming member, and an installation structure for a curved path forming device that can be easily installed even when the wall hole is located near the corner of an inside corner area.

In order to achieve the above object, the curved path forming member, the curved path forming device, the inside corner area path forming member, and the installation structure of the curved path forming device according to the present invention have the following configurations:
The present invention provides a curved path forming member for covering a curved path in a wiring/piping material installation path that runs along a corner area formed by two wall surfaces of a building, bends, and continues into a wall hole formed in the wall surfaces. The curved path forming member includes two abutment portions that abut against the two wall surfaces, respectively, and includes a storage space that accommodates the curved path, a communication opening that connects the storage space to a linear path along the corner area of the installation path, and an opening that connects the storage space to the wall hole. The opening is provided so as to open to either side of the two wall surfaces.

This curved path forming member has two abutment portions that abut against two wall surfaces in an internal corner area formed by the two wall surfaces. The curved path forming member also has an opening that connects the internal storage space to a wall hole formed in the wall surface. Because the opening is open on either side of the two wall surfaces, the opening can connect the storage space to the wall hole regardless of which of the two wall surfaces the wall hole is located in. This allows the curved path forming member to be easily installed relative to the wall hole, even if the wall hole is located near the corner of the internal corner area.

The invention also provides a curved path forming member comprising a base body and a cover body that are assembled together to form the storage space therein, wherein the two abutment portions are provided on the base body, and the opening is provided in the base body, and the opening comprises an opening formed in each of the two abutment portions.

A second aspect of the present invention provides the curved path forming member according to the first aspect, wherein the openings are formed so that the openings communicate with each other.

Furthermore, the curved path forming member of the invention described in claim 3 is the curved path forming member described in claim 1 or 2 , wherein the base body and/or the cover body have a flange portion extending away from the inside corner area so as to be able to fit along at least one of the two wall surfaces, and the flange portion can cover a portion of the wall hole formed shifted away from the inside corner area.

Furthermore, the curved path forming member according to the invention described in claim 4 is the curved path forming member described in claim 3 , in which there is one communication port and two flange portions are provided, and these flange portions are extended so as to be able to follow the respective wall surfaces of the two wall surfaces.

A fifth aspect of the present invention provides a curved path forming device including the curved path forming member according to the first or second aspect, and a spacer. Here, the spacer is interposed between one of the two contact portions and the wall surface facing the contact portion, and raises the curved path forming member relative to the wall surface.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, a plurality of the spacers are provided corresponding to the two contact portions, and the spacers are of the same shape. In this case, the spacers may be used in the same orientation for each of the two contact portions, in different orientations, or upside down. However, since the spacers have the same shape, there is no need to prepare multiple types of spacers, and spacer management is easy.

A seventh aspect of the present invention provides a curved path forming device according to the fifth aspect, wherein the spacer includes a spacer body that overlaps the abutting portion and an engaging portion that protrudes from the spacer body. The engaging portion is engageable with an engaged portion provided on the abutting portion so that the abutting portion and the spacer are aligned. The engaging portion is formed integrally with the spacer body via a breakable fragile portion. This allows the engaging portion to be easily removed by breaking the fragile portion.

An inside corner area path forming member according to an eighth aspect of the present invention comprises the curved path forming member according to the first or second aspect and a straight path forming member that covers the straight path. The straight path forming member has a straight accommodation space that accommodates the straight path. The curved path forming member also has a connection port on the communication port side to which an end of the straight path forming member is connected.

The installation structure for a curved path forming device according to a ninth aspect of the present invention is the installation structure for a curved path forming device according to the fifth aspect. Here, the spacer includes engaging portions protruding from both sides of the thickness of the spacer. One or more of the spacers are interposed between one of the two abutment portions and the wall surface facing the abutment portion, with one or more spacers overlapping each other. At this time, the engaging portion protruding from the surface of the spacer facing the abutment portion engages with an engaged portion provided on the abutment portion so that the abutment portion and the spacer abutting the abutment portion are aligned. The engaging portion protruding from the wall surface side of the spacer abutting the wall surface fits into the wall hole. When the engaging portion protruding from the wall surface side of the spacer abuts a wall surface with a wall hole fits into the wall hole, there is no need to remove the engaging portion from the spacer.

The installation structure for a curved path forming device according to the invention of claim 10 is the installation structure for a curved path forming device according to claim 5. Here, the spacer has a locking portion protruding from at least one surface of the spacer in its thickness direction. A plurality of the spacers are interposed between one of the two abutment portions and the wall surface facing the abutment portion, with the locking portion of one spacer engaging with the locked portion provided on the other spacer so that the overlapping spacers are aligned. The spacer that abuts the wall surface has the locking portion protruding from the surface facing the wall surface, and the locking portion fits into the wall hole. In a spacer that abuts a wall surface with a wall hole, the locking portion protruding from the surface facing the wall surface fits into the wall hole, eliminating the need to remove the locking portion from the spacer.

The curved path forming member, curved path forming device, inside corner area path forming member, and installation structure for the curved path forming device according to this invention have two abutment portions that abut against two wall surfaces and openings that open on either side of the two wall surfaces, making it possible to easily install the curved path forming member, curved path forming device, or inside corner area path forming member even if the wall hole is located near the corner of the inside corner area.

FIG. 1 is a plan view of a first embodiment of the present invention. FIG. 10 is a cross-sectional view showing a curved path forming member portion of the same. FIG. 10 is a perspective view showing a curved path forming member portion of the same. FIG. 10 is a perspective view of the curved path forming member with the cover removed. FIG. FIG. FIG. FIG. 10 is a plan view of a second embodiment of the present invention. FIG. 10 is a cross-sectional view showing a curved path forming member portion of the same. FIG. 10 is a perspective view showing a curved path forming member portion of the same. FIG. 10 is a perspective view of the curved path forming member with the cover removed. FIG. 10 is a perspective view of the same with the bent path forming member removed. 10A, 10B, and 10C are diagrams showing the spacer, in which FIG. 10A is a plan view, FIG. 10B is a front view, and FIG. 9, but showing two spacers provided on one wall surface (and thus on one contact portion). 11, but in which one spacer is provided on each of the two wall surfaces (and thus the two contact portions). This is also a view equivalent to FIG. 11, in which two spacers are provided on each of the two wall surfaces (and thus on the two contact portions). Similarly, this is equivalent to figure 12. FIG. 10 is an enlarged cross-sectional view of a main part showing a modified example of the spacer. FIG. 10 is an exploded perspective view showing a conventional protective cover.

The following describes an embodiment of the present invention with reference to the drawings.

Figures 1 to 7 show a first embodiment of the present invention. In the figures, reference numeral 1 denotes an inside corner area, which is formed by two wall surfaces 1a, 1a of a building. 2 denotes a curved path forming member. 3 denotes a straight path forming member. 4 denotes an inside corner area path forming member.

The curved path forming member 2 covers the curved path of the wiring/piping material (wiring or piping material (not shown)) installation path that curves along the inside corner area 1 and continues into a wall hole 1b formed in the wall surface 1a. The curved path forming member 2 has two abutment portions 2a, 2a that abut against the two wall surfaces 1a, 1a, respectively. The curved path forming member 2 also has a storage space 2b that accommodates the curved path, a communication opening 2c that connects the storage space 2b to the linear path side of the installation path that runs along the inside corner area 1, and an opening 2d that connects the storage space 2b to the wall hole 1b. The opening 2d is provided so as to open to either side of the two wall surfaces 1a, 1a. Here, wall surface 1a consists of a vertical wall surface, floor wall surface, ceiling wall surface, etc., and inside corner area 1 consists of an upper inside corner area where the ceiling wall surface and the vertical wall surface intersect, a lower inside corner area where the vertical wall surface and the floor wall surface intersect, and a vertical inside corner area where the vertical wall surfaces intersect.

In more detail, the curved path forming member 2 comprises a base body 5 and a cover body 6, which are assembled together to form an internal storage space 2b. The two abutment portions 2a, 2a are provided on the base body 5. The opening 2d is provided on the base body 5, and the opening 2d comprises an opening 5a formed in each of the two abutment portions 2a, 2a. The base body 5 and/or the cover body 6 (base body 5 in the illustrated embodiment) also have a flange portion 5b extending away from the inside corner region 1 so as to be able to fit along at least one of the two wall surfaces 1a, 1a. This flange portion 5b can cover a portion of the wall hole 1b formed away from the inside corner region 1. More specifically, two flange portions 5b are provided, each extending so as to be able to fit along each of the two wall surfaces 1a, 1a.

The inside corner area path forming member 4 consists of the curved path forming member 2 and the straight path forming member 3 that covers the straight path. Here, the straight path forming member 3 has a straight storage space 3a that accommodates the straight path. The curved path forming member 2 has a connection port 2e on the communication port 2c side to which the end of the straight path forming member 3 is connected. In detail, the curved path forming member 2 has one communication port 2c (i.e., there is only one communication port 2c), and this connection port 2e is provided on the communication port 2c side.

Specifically, the base body 5 is formed in a plate shape and has the two abutment portions 2a, 2a and a connecting portion 5c connecting the two abutment portions 2a, 2a. The two abutment portions 2a, 2a are arranged along the abutting wall surfaces 1a, 1a, and the connecting portion 5c is formed at an angle relative to the two abutment portions 2a, 2a to chamfer the space between them. Specifically, the plate surfaces of the two abutment portions 2a, 2a are perpendicular to each other, and the connecting portion 5c is inclined at 45° relative to the abutment portions 2a, 2a. The opening 2d is therefore arranged to span the two abutment portions 2a, 2a and the connecting portion 5c, allowing the openings 5a, 5a formed in the two abutment portions 2a, 2a to communicate with each other. Each abutment portion 2a, 2a extends away from the inside corner region 1, and this extended portion becomes the flange portion 5b.

The base body 5 also has a protrusion 5d that protrudes from one side along the inside corner area 1 and engages with the linear path forming member 3 (in the illustrated embodiment, it protrudes from two locations where the two abutment portions 2a, 2a are connected to the connecting portion 5c). This engagement aligns the curved path forming member 2 (more specifically, the base body 5) and the linear path forming member 3 with each other.

The cover body 6 is plate-shaped and curved to surround the curved path (i.e., the storage space 2b). The cover body 6 has a mating protrusion 6a that protrudes inward. The corresponding base body 5 has a mating recess 5e, and the cover body 6 is attached to the base body 5 by fitting the mating protrusion 6a into the mating recess 5e. At this time, the cover body 6 does not cover the entire base body 5, and a portion of the base body 5 (the flange portion 5b in the illustrated embodiment) is exposed from the cover body 6. Furthermore, one side of the cover body 6 along the inside corner area 1 forms the connection port 2e, and this connection port 2e covers the end of the linear path forming member 3.

Next, we will explain the effects of the curved path forming member 2 shown in this first embodiment and the inside corner area path forming member 4 equipped with the curved path forming member 2. The curved path forming member 2 has two abutment portions 2a, 2a that abut against two wall surfaces 1a, 1a in the inside corner area 1 formed by the two wall surfaces 1a, 1a. The curved path forming member 2 has an opening 2d that connects the inner storage space 2b to a wall hole 1b formed in the wall surface 1a. Because the opening 2d opens on either side of the two wall surfaces 1a, 1a, the opening 2d allows communication between the wall hole 1b and the storage space 2b regardless of whether the wall hole 1b is located on either of the two wall surfaces 1a, 1a. This allows the curved path forming member 2 to be easily installed relative to the wall hole 1b, even if the wall hole 1b is located near the corner of the inside corner area 1. In other words, the two abutting portions 2a, 2a abut against the two wall surfaces 1a, 1a, and the opening 2d opens on either side of the two wall surfaces 1a, 1a, so the curved path forming member 2 can be easily installed even if the wall hole 1b is located near the corner of the recessed corner area 1.

Furthermore, in the curved path forming member 2, the opening 2d has openings 5a, 5a formed in each of the two abutting portions 2a, 2a, and these openings 5a, 5a are formed to be connected to each other, so this opening 2d can also accommodate a wall hole 1b formed to straddle two wall surfaces 1a, 1a.

The curved path forming member 2 also has a connection port 2e to which the end of the straight path forming member 3 is connected, and the inside corner area path forming member 4 is configured by adding the straight path forming member 3 to this curved path forming member 2. As with the curved path forming member 2, the inside corner area path forming member 4 can be easily installed.

Furthermore, the base body 5 and/or cover body 6 (base body 5 in the illustrated embodiment) are provided with a flange portion 5b, and even if the wall hole 1b is formed offset away from the inside corner area 1, this flange portion 5b covers a portion of the wall hole 1b (i.e., the side of the wall hole 1b away from the inside corner area 1), thereby preventing the wall hole 1b from being exposed.

Furthermore, when wiring or piping material is pulled out from a wall hole 1b formed in one wall surface 1a and is to be routed along the other wall surface 1a, it has traditionally been necessary to first bend it along one wall surface 1a, then bend it over the corner of the recessed corner area 1 and route it onto the other wall surface 1a, which requires an excessive amount of protective cover and results in an unsightly appearance. However, by using the bent path forming member 2 equipped with the aforementioned abutment portions 2a, 2a and opening 2d, the number of times the wiring or piping material needs to be bent can be reduced, resulting in a more attractive appearance.

Figures 8 to 18 show a second embodiment of the present invention. This embodiment relates to a curved path forming device 8 that adds a spacer 7 to the curved path forming member 2 of the first embodiment, and to the installation structure of this curved path forming device 8. Similar parts will be assigned the same reference numerals below, and differences will be mainly described.

The curved path forming device 8 includes a curved path forming member 2 and a spacer 7. The spacer 7 is interposed between one of the two contact portions 2a of the curved path forming member 2 and the wall surface 1a facing that contact portion 2a, thereby raising the curved path forming member 2 relative to that wall surface 1a.

In the examples shown in Figures 8 to 12, one spacer 7 is provided on only one wall surface 1a (and thus one abutment portion 2a), while in Figure 14, two spacers 7 are provided on only one wall surface 1a (and thus one abutment portion 2a). Also, in Figures 15 to 16 and 17 to 18, multiple spacers 7 (two, one on each wall surface in the examples shown in Figures 15 to 16, and four, two on each wall surface in the examples shown in Figures 17 to 18) are provided to correspond to each of the two wall surfaces 1a, 1a (and thus two abutment portions 2a, 2a), and these spacers 7, 7 are made of spacers of the same shape. Here, the spacers 7 may be used in the same orientation for each of the two wall surfaces 1a, 1a (i.e., for each of the two abutment portions 2a, 2a), or may be used with their orientations reversed, or reversed (in the illustrated embodiment, they are used with their orientations reversed).

Here, the spacer 7 comprises a spacer body 7a that overlaps the abutment portion 2a of the curved path forming member 2, and an engagement portion 7b that protrudes from the spacer body 7a. The engagement portion 7b can engage with an engaged portion 5f provided on the abutment portion 2a so that the abutment portion 2a and the spacer 7 are aligned. In the illustrated embodiment, the engagement portion 7b is formed in a cylindrical shape, and the engaged portion 5f consists of a hole into which the engagement portion 7b fits.

The spacer 7 also has engaging portions 7b that protrude from both sides of the spacer 7. Therefore, in the installation structure of the curved path forming device 8, one or more spacers 7 are interposed between one of the two contact portions 2a of the curved path forming member 2 and the wall surface 1a facing the contact portion 2a, with one or more spacers 7 superimposed on the other. The engaging portion 7b protruding from the surface of the spacer 7 facing the contact portion 2a engages with the engaged portion 5f provided on the contact portion 2a so that the contact portion 2a and the spacer 7 contacting the contact portion 2a are aligned. The engaging portion 7b protruding from the surface of the spacer 7 contacting the wall surface 1a fits into the wall hole 1b.

The spacer 7 also has a locking portion 7c protruding from at least one surface (both surfaces in the illustrated embodiment) of the spacer 7. Therefore, in the installation structure of the curved path forming device 8, multiple spacers 7 are interposed between one of the two contact portions 2a of the curved path forming member 2 and the wall surface 1a facing that contact portion 2a, with multiple spacers 7 stacked one on top of the other. The locking portion 7c of one spacer 7 engages with the locked portion 7d of the other spacer 7 so that the overlapping spacers 7 are aligned with each other. The spacer 7 that contacts the wall surface 1a has a locking portion 7c protruding from the surface facing the wall surface 1a, and the locking portion 7c fits into the wall hole 1b. In the illustrated embodiment, the locking portion 7c is cylindrical, and the locked portion 7d is a hole into which the locking portion 7c fits.

More specifically, the spacer 7 is formed in a flat plate shape and has a roughly semicircular notched hole 7e formed therein to align with the opening 2d (more specifically, the opening 5a) formed in the base body 5, and has a contour that follows the outer shape of the contact portion 2a. The spacer 7 also has protrusions that protrude from both sides of the spacer 7's thickness, and these protrusions serve as the engaging portion 7b and also as the locking portion 7c.

The spacer 7 is also formed with a protrusion 7f that engages with the linear spacer 9 located between the linear path forming member 3 and the wall surface 1a, protruding to one side along the inside corner region 1. This engagement aligns the spacer 7 and linear spacer 9 with each other. In the illustrated embodiment, the protrusion 7f is formed to protrude so as to abut against the outer surface of the linear spacer 9, but the location of this abutment is not particularly important.

The base body 5 is fixed to the wall surface 1a by a fastener (not shown) such as a screw that penetrates the contact portion 2a and is screwed or driven into the wall surface 1a (as in the first embodiment). If a spacer 7 is interposed between the contact portion 2a and the wall surface 1a, the fastener penetrates the spacer 7 in addition to the contact portion 2a, and the spacer 7 is also fixed to the wall surface 1a together with the contact portion 2a (and thus the base body 5). However, the spacer 7 may be fixed to the wall surface 1a first, and then the base body 5 may be fixed to the spacer 7, or the base body 5 may be fixed to the wall surface 1a using a fastener that penetrates the spacer 7. Alternatively, the base body 5 and spacer 7 may be fixed by adhesive or cohesive bonding without using a fastener.

The effects of this second embodiment are similar to those of the first embodiment, but the inclusion of the spacer 7 provides the following additional effects:

The curved path forming device 8 is configured by adding a spacer 7 to the curved path forming member 2, and like the curved path forming member 2, the curved path forming device 8 can be easily installed.

In addition, multiple spacers 7 are provided to correspond to the two wall surfaces 1a, 1a, and therefore to the two abutment portions 2a, 2a of the curved path forming member 2 (more specifically, the base body 5), and these spacers 7, 7 are made of spacers of the same shape. This eliminates the need to prepare multiple types of spacers 7, making spacer 7 management easier.

In addition, for spacers 7 that abut against wall surface 1a with wall hole 1b, the engaging portions 7b and locking portions 7c protruding from the surface facing wall surface 1a fit into wall hole 1b, eliminating the need to remove the engaging portions 7b and locking portions 7c from the spacer 7. However, for spacers 7 that abut against wall surface 1a without wall hole 1b, the engaging portions 7b and locking portions 7c protruding from the surface facing wall surface 1a must be removed.

The present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, the curved path forming member 2 is composed of a base body 5 and a cover body 6. However, these may be separate and not separable, or may be rotatable via a hinge. Alternatively, the base body 5 may be omitted, and the cover body 6 may consist solely of a cover body 6, which may have contact portions 2a, 2a and an opening 2d, and may also be provided with a means for fixing the cover body 6 to the wall surface 1a.

In addition, in the illustrated embodiment, the wall hole 1b is provided on only one of the two wall surfaces 1a, 1a, but it may be provided on both wall surfaces.

In the example of the second embodiment shown in Figures 15-16 and 17-18, multiple spacers 7 are provided to correspond to each of the two wall surfaces 1a, 1a (and thus the two abutment portions 2a, 2a). These spacers 7, 7 are identical in shape and are used upside down for each of the two wall surfaces 1a, 1a (i.e., for each of the two abutment portions 2a, 2a). However, if the spacer 7 or the spacer main body 7a has a bilaterally symmetrical shape, it can be used by changing its orientation without being inverted (more specifically, by rotating it 180 degrees around an axis perpendicular to wall surface 1a). Furthermore, if the shape of the spacer 7 is simpler, it can also be used in the same orientation for wall surface 1a (i.e., for abutment portion 2a).

Also, as shown in Figure 19, the engaging portions 7b and locking portions 7c of the spacer 7 may be formed integrally with the spacer body 7a via breakable fragile portions 7g. This allows the engaging portions 7b and locking portions 7c to be easily removed by breaking the fragile portions 7g. In this figure, the engaging portions 7b and locking portions 7c are connected to the spacer body 7a via the thin-walled portions that form the fragile portions 7g. Therefore, to remove the engaging portions 7b and locking portions 7c, the surface of the spacer 7 facing the wall surface 1a is pressed against the wall surface 1a. This presses the engaging portions 7b and locking portions 7c against the wall surface 1a, breaking the fragile portions 7g and separating the engaging portions 7b and locking portions 7c from the spacer body 7a.

Furthermore, the openings 2d may be opened separately (independently) on each side of the two wall surfaces 1a, 1a (i.e., they do not need to be connected to each other).

Furthermore, the opening 2d itself may be completely or partially blocked so that it can be opened. In other words, the blocked portion may be knockable, or the opening 2d may be completely or partially blocked with a removable lid.

DESCRIPTION OF SYMBOLS 1 Inside corner area 1a Wall surface 1b Wall hole 2 Curved path forming member 2a Contact portion 2b Storage space 2c Communication port 2d Opening 2e Connection port 3 Straight path forming member 3a Straight storage space 4 Inside corner area path forming member 5 Base body 5a Opening 5b Flange portion 5f Engaged portion 6 Cover body 7 Spacer 7a Spacer body 7b Engaging portion 7c Locking portion 7d Locked portion 7g Weak portion 8 Curved path forming device

Claims (10)

A curved path forming member that covers a curved path in a wiring/piping material installation path that runs along an inside corner area formed by two wall surfaces of a building and curves to continue into a wall hole formed in the wall surfaces,
Two abutment portions that abut against the two wall surfaces, respectively; and
a storage space for storing the curved path, a communication opening through which the storage space communicates with a linear path side along the inside corner area of the arrangement path, and an opening through which the storage space communicates with the wall hole,
The opening is provided so as to open on either side of the two wall surfaces ,
a base body and a cover body that are assembled together to form the storage space therein;
The base body is provided with the two abutment portions,
The opening is provided in the base body, and the opening has openings formed in each of the two abutment portions. The curved path forming member according to claim 1 , wherein the openings are formed so that the openings communicate with each other. 3. The curved path forming member according to claim 1, wherein the base body and/or the cover body have a flange portion extending away from the inside corner area so as to be able to fit along at least one of the two wall surfaces, and the flange portion is capable of covering a portion of the wall hole formed away from the inside corner area. The communication port is one,
The curved path forming member according to claim 3 , wherein two flange portions are provided, and the flange portions are extended so as to be able to fit along each of the two wall surfaces. A bending path forming member according to claim 1 or 2 and a spacer,
The spacer is interposed between one of the two abutment portions and the wall surface facing the abutment portion, and raises the curved path forming member relative to the wall surface. 6. The curved path forming device according to claim 5 , wherein a plurality of the spacers are provided so as to correspond to the two contact portions, and the spacers have the same shape. the spacer includes a spacer body that is overlapped with the abutment portion and an engagement portion that protrudes from the spacer body;
the engaging portion is engageable with an engaged portion provided on the abutting portion so that the abutting portion and the spacer are aligned, and
The curved path forming device according to claim 5 , wherein the engaging portion is integrally formed with the spacer body via a breakable weakened portion. 3. An inside corner area path forming member comprising the curved path forming member according to claim 1 or 2 and a straight path forming member covering the straight path,
the linear path forming member includes a linear accommodation space that accommodates the linear path,
The curved path forming member has a connection port on the communication port side to which an end of the straight path forming member is connected. The installation structure of the curved path forming device according to claim 5 ,
The spacer has engagement portions protruding from both sides of the spacer in the thickness direction,
the spacer is interposed between one of the two contact portions and the wall surface facing the contact portion, with one or more spacers being superimposed on each other;
The engaging portion of the spacer, which protrudes from a surface of the spacer on the contact portion side, engages with an engaged portion provided on the contact portion so that the contact portion and the spacer abutting against the contact portion are aligned, and
An installation structure for a curved path forming device, wherein the engaging portion of the spacer that abuts against the wall surface protrudes from the surface facing the wall surface and fits into the wall hole. The installation structure of the curved path forming device according to claim 5 ,
the spacer has a locking portion protruding from at least one surface of the spacer along its thickness;
the spacer is interposed between one of the two contact portions and the wall surface facing the contact portion in a stacked manner;
The plurality of spacers are arranged such that the locking portion of one spacer engages with the locked portion provided on the other spacer so that the overlapping spacers are aligned with each other, and
The spacer abutting against the wall surface has the engaging portion protruding from the surface on the wall surface side, and the engaging portion is inserted into the wall hole.