JP2023054814A - Step joint cover and step joint cover unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a step joint cover which can cope with a step part having a height which is different that of a wall face, largely enhances versatility, and improved in usability at construction.

SOLUTION: A step joint cover 1 comprises: a tubular first duct member 10 which is arranged while straddling a step part 5, allows the penetration of piping 3 or the like therein, and is arranged at a lower face 6 of the step part 5; a tubular second duct member 20 arranged at a high face 8 of the step part 5; and a tubular connecting member 30 for separating an end part of the first duct member 10 and an end part of the second duct member 20, and connecting the first duct member 10 and the second duct member 20. The connecting member 30 is connected to the end part of the first duct member 10 at its one end part so as to be turnable, and connected to the end part of the second duct member 20 at the other end part so as to be turnable, and its connection angle is adjustable according to a height of the step part 5.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a stepped joint cover and a stepped joint cover unit for inserting and protecting pipes and wiring arranged along a stepped portion provided on a wall surface of a building, for example.

2. Description of the Related Art Conventionally, pipes such as refrigerant pipes of air conditioners (air conditioners) are arranged so as to lead from an indoor unit to an outlet provided on a wall surface of a building and then lead along the wall surface to an outdoor unit. In this case, the pipe running along the wall surface is inserted through the inside of the pipe protection duct for protection.

However, in the conventional pipe protection duct, when the wall surface is provided with a stepped portion, the ends of the pipe protection duct are connected to each other by a connecting member having a flexible accordion structure (hereinafter also referred to as a connecting member). I was trying to straddle the stepped part of the wall surface.

In this way, when the connecting member of the bellows structure is deformed to straddle the stepped portion of the wall surface, the deformed portion of the connecting member of the bellows structure deteriorates over time, or only the stepped portion is different from other pipe protection ducts. There is a problem of an unattractive appearance due to the different bellows appearance.

In order to solve this problem, conventionally, there has been proposed a connection member for a pipe protection duct that does not deteriorate with time and has a good external appearance. The connecting member comprises a first connecting member and a second connecting member. The first connection member is formed in a substantially cylindrical shape, bent at a predetermined angle, and has a connection opening with a pipe protection duct at one end. The second connecting member is formed in a substantially cylindrical shape, bent at a predetermined angle, and has a connecting port at one end into which the other end of the first connecting member is inserted or externally inserted. Further, in the connecting member of the pipe protection duct, the bending direction of the second connecting member is opposite to the bending direction of the first connecting member (see, for example, Patent Document 1).

Japanese Patent No. 3649047

By the way, in the connection member of the pipe protection duct, there is the advantage that the connection member portion does not deteriorate over time and the appearance is good compared to the connection member having the bellows structure. Since the angle and the bending angle of the second connecting member are fixed, it is necessary to use a member with a different bending angle each time the height of the stepped portion of the wall surface is different. Therefore, there is a problem that the connection member of the conventional pipe protection duct has extremely low versatility and is uneconomical.

The present invention has been made in view of such problems, and a stepped joint cover and a stepped joint that are capable of supporting stepped portions of different heights on a wall surface, greatly improving versatility, and improving usability during construction. The object is to provide a cover unit.

In order to achieve such a task, the invention according to claim 1 is a stepped joint cover which is disposed across a stepped portion provided on a wall surface, is formed in a tubular shape, and has at least one of piping and wiring inserted therein. a tubular first duct member arranged on a low surface formed on the stepped portion; a tubular second duct member arranged on a high surface formed on the stepped portion; a tubular connecting member separating an end of one duct member and an end of the second duct member and connecting the first duct member and the second duct member; The connecting member has one end rotatably connected to the end of the first duct member and the other end rotatable to the end of the second duct member. It is characterized in that the connection angle can be adjusted according to the height of the stepped portion.

According to a second aspect of the invention, in addition to the configuration of the first aspect, the first duct member and the second duct member are each divided into two in the circumferential direction, and the first duct member is: A first duct base portion installed on the low surface side and a first duct cover portion attached to the first duct base portion are provided, and the second duct member is installed on the high surface side. and a second duct cover portion attached to the second duct base portion. and a connection cover portion attached to the connection base portion, and one end of the first duct base portion of the first duct member and the connection base portion of the connection member are connected via a first base rotation shaft. The second duct base portion of the second duct member and the other end of the connection base portion of the connection member are rotatably connected via a second base rotation shaft to the base. A unit is configured in which one end of a first duct cover portion of the first duct member and a connection cover portion of the connection member are rotatably connected via a first cover rotation shaft, and the second The second duct cover portion of the duct member and the other end of the connection cover portion of the connection member are rotatably connected via a second cover rotation shaft to form a cover unit, which is connected to the first base rotation shaft. The distance between the second base rotating shaft and the distance between the first cover rotating shaft and the second cover rotating shaft are the same.

The invention according to claim 3, in addition to the configuration according to claim 2, is arranged such that the first base rotation shaft is shifted toward the connecting member side with respect to the first cover rotation shaft, The second cover rotating shaft is arranged to be shifted toward the connecting member with respect to the second base rotating shaft.

According to a fourth aspect of the invention, in addition to the configuration according to the third aspect, the connecting member is configured such that the connecting base portion and the connecting cover portion can be attached to each other at different positions in the longitudinal direction. It is characterized by

The invention according to claim 5 is characterized in that, in addition to the configuration according to claim 3 or 4, the connection member is configured such that the diameter of the connection base portion and the connection cover portion can be reduced and expanded. do.

According to a sixth aspect of the present invention, there is provided a stepped joint cover unit that is installed on a wall surface and arranged over a protruding portion having stepped portions formed on both sides thereof, wherein the stepped joint cover unit is arranged on each of the stepped portions on both sides. The stepped joint cover according to any one of items 1 to 5 is provided, and the second duct members of the stepped joint cover are connected to each other.

The invention according to claim 7 is characterized in that, in addition to the configuration according to claim 6, the length of the second duct member is adjustable according to the width of the protrusion. .

The invention according to claim 8 is characterized in that, in addition to the configuration according to claim 7, the second duct member is formed with a plurality of cutting guide grooves that can be cut off in the length direction.

According to a ninth aspect of the invention, there is provided a stepped joint cover unit that is installed on a wall surface and arranged to straddle a protruding portion having stepped portions formed on both sides thereof, wherein the stepped joint cover unit is arranged on a high surface of the stepped portion. 6. The second duct member of the step joint cover according to any one of items 1 to 5, the connecting members arranged on both sides of the second duct member, and the second connecting members connected to the connecting members, respectively. 1 duct member.

According to the first aspect of the invention, the step joint cover separates the end of the first duct member and the end of the second duct member, and the first duct member and the second duct One end of this connecting member is rotatably connected to the end of the first duct member, and the other end is of the second duct member. Since it is rotatably connected to the end portion and the connection angle is configured to be adjustable according to the height of the stepped portion provided on the wall surface, it is possible to correspond to the stepped portion of the wall surface with different heights. , the versatility can be greatly enhanced. As a result, it is easy to use when constructing the stepped joint cover.

According to the second aspect of the invention, the interval between the first base rotation shaft and the second base rotation shaft and the interval between the first cover rotation shaft and the second cover rotation shaft are the same. , a parallel crank mechanism is constructed, and when one of the first duct member and the second duct member is fixed, the other is translated. As a result, even if the height of the step portion changes, it can be easily dealt with.

According to the third aspect of the invention, the first base rotation shaft is arranged to be displaced toward the connecting member from the first cover rotation shaft, while the second cover rotation shaft Since the drive shaft is shifted toward the connecting member side, even if the connecting angle of the connecting member changes according to the height of the stepped portion, the height of the stepped portion can be adjusted without changing the length of the connecting member. can follow. Therefore, the usability in constructing the stepped joint cover is further improved.

According to the fourth aspect of the invention, the connection member is configured such that the attachment positions of the connection base portion and the connection cover portion in the longitudinal direction can be changed relative to each other. and the area of the opening of the second duct member, and without changing the length of the connecting member. Therefore, the usability in constructing the stepped joint cover is further improved.

According to the fifth aspect of the invention, since the connection member is configured such that the diameter of the connection base portion and the connection cover portion can be reduced and expanded, the first duct The height of the step can be followed without changing the area of the opening of the member and the area of the opening of the second duct member and without changing the length of the connecting member. Therefore, the usability in constructing the stepped joint cover is further improved.

According to the sixth aspect of the invention, the stepped joint cover unit has the stepped joint cover according to any one of the first to fifth aspects disposed at the stepped portions on both sides. Since the second duct members are connected to each other, it is possible to deal with protrusions on the wall surface of different heights, thereby greatly enhancing versatility. As a result, it is easy to use when constructing the step joint cover unit.

According to the seventh aspect of the invention, the length of the second duct member is adjustable in accordance with the width of the projection. The length of the member can easily be made the same as the width of the protrusion. Therefore, the usability in constructing the stepped joint cover unit is further improved.

According to the eighth aspect of the invention, the second duct member has a plurality of cutting guide grooves that can be cut off, so that the length of the second duct member is equal to the width of the projecting portion. can be made substantially identical. Therefore, the usability in constructing the stepped joint cover unit is further improved.

According to the invention of claim 9, the second duct member of the step joint cover according to any one of claims 1 to 5, which is arranged on the high surface of the stepped portion, and the second duct member and the first duct members respectively connected to these connecting members, it is possible to cope with protrusions of different heights on the wall surface, and to greatly enhance versatility. can be done. As a result, the usability in constructing the stepped joint cover unit is further improved.

FIG. 4 is a perspective view showing a state in which stepped joint covers according to an embodiment of the present invention are respectively installed on upper and lower stepped portions; FIG. 4 is an exploded perspective view showing a state in which stepped joint covers of the same embodiment are respectively installed on upper and lower stepped portions; FIG. 4 is an enlarged cross-sectional view showing a state in which stepped joint covers of the same embodiment are respectively installed on upper and lower stepped portions; FIG. 4 is a cross-sectional view showing a first duct member or a second duct member in the step joint cover of the same embodiment; It is a cross-sectional view showing a connecting member in the step joint cover of the same embodiment. FIG. 4 is a cross-sectional view showing a state in which a connecting member is connected to the first duct member or the second duct member in the step joint cover of the same embodiment; It is a figure which shows the state which installed the step joint cover of the same embodiment without a level|step difference, (a) is a side view, (b) is a longitudinal cross-sectional view. It is a figure which shows the state which installed the step joint cover of the same embodiment with a level|step difference of 15 mm, (a) is a side view, (b) is a longitudinal cross-sectional view. It is a figure which shows the state which installed the step joint cover of the same embodiment with a level|step difference of 30 mm, (a) is a side view, (b) is a longitudinal cross-sectional view. (a) is a side view and (b) is a vertical cross-sectional view of the stepped joint cover of the same embodiment, which is constructed with a step of 30 mm. It is a side view which shows the state which constructed the step joint cover of the same embodiment with a step|step difference of 15 mm. FIG. 10 is a side view showing a state in which the stepped joint cover of the same embodiment is applied to different steps on the upper and lower sides; BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the construction state of the step joint cover unit which concerns on 1st Embodiment of this invention, (a) is an exploded perspective view, (b) is a side view. It is a figure which shows the construction state of the step joint cover unit which concerns on 2nd Embodiment of this invention, (a) is an exploded perspective view, (b) is a longitudinal cross-sectional view. It is a figure which shows the construction state which shortened the 2nd duct of the step joint cover unit which concerns on 2nd Embodiment, (a) is an exploded perspective view, (b) is a longitudinal cross-sectional view. FIG. 10 is a cross-sectional view showing an exploded engagement state of the second duct member of the step joint cover unit according to the second embodiment; FIG. 11 is a cross-sectional view showing an engagement state of a second duct member of the step joint cover unit according to the second embodiment; It is a figure which shows the construction state of the step joint cover unit which concerns on 3rd Embodiment of this invention, (a) is an exploded perspective view, (b) is a longitudinal cross-sectional view. FIG. 10A is an exploded perspective view and FIG. 1B is a vertical cross-sectional view showing a construction state in which the second duct member of the step joint cover unit according to the third embodiment is installed short.

[One embodiment of stepped joint cover]
The stepped joint cover of this embodiment, for example, pulls out pipes such as refrigerant pipes and drain hoses from the indoor unit of an air conditioner (air conditioner) through an outlet provided on the wall surface, and the pipes are connected to the outdoor unit along the wall surface. It is used to insert and protect the piping arranged across the stepped part provided on the wall surface when guiding the pipe.

In this embodiment, as an example, the "wall surface" according to the present invention is the wall surface of the building, and the "pipe" is a refrigerant pipe leading from the indoor unit of the air conditioner to the outdoor unit. , the "wall surface" may be any wall surface or wall-like object other than the building, and the "pipe" may be any pipe other than the refrigerant pipe of the air conditioner. Further, what is inserted into the stepped joint cover according to the present invention to be protected is not limited to the piping described above, but may be only "wiring" of an electric system, or both piping and wiring may be inserted and protected. good too.

Furthermore, the case where the "protrusion" according to the present invention is installed horizontally on the wall surface of the building at a predetermined height, for example, with a width of about 100 to 200 mm will be described. Any wall surface or wall-like one, and one installed in any direction may be used. And although the above-mentioned "projection part" is each provided with the "stepped part" in the up-and-down direction, it does not necessarily have to be in the up-and-down direction.

Further, in the present embodiment, as an example, a low surface on which the “stepped portion” according to the present invention is formed on the wall surface, a curved wall formed by bending continuously from the low surface, and the curved wall A case in which a continuously formed high surface (stepped surface) is provided will be described. It may be a step.

1-12 show a step joint cover according to one embodiment of the present invention.

First, the configuration of this embodiment will be described.

FIG. 1 is a perspective view showing a state in which stepped joint covers according to an embodiment of the present invention are installed on upper and lower stepped portions, respectively. FIG. 2 is an exploded perspective view showing a state in which stepped joint covers of the same embodiment are respectively installed on upper and lower stepped portions.

As shown in FIGS. 1 and 2, the stepped joint cover 1 of the present embodiment extends pipes 3 such as a refrigerant pipe and a drain hose from an indoor unit of an air conditioner (not shown) along a wall surface 2 to an outdoor unit (not shown). It is used to protect the piping 3, which is placed across the upper and lower stepped portions 5 of the projecting portion 4 provided on the wall surface 2, when it is guided to the machine.

Upper and lower stepped portions 5, 5 are formed in the projecting portion 4, respectively. These upper and lower stepped portions 5, 5 are composed of upper and lower low surfaces 6 that form the wall surface 2, curved walls 7 formed by rising and bending continuously from these low surfaces 6, and these curved walls 7. and a high surface 8 formed higher than the continuous low surface 6. - 特許庁This high surface 8 forms a stepped surface.

The stepped joint cover 1 is arranged across the upper and lower stepped portions 5, 5, respectively. That is, the stepped joint cover 1 is arranged across the upper stepped portion 5 and is arranged across the lower stepped portion 5 .

Each step joint cover 1 comprises a first duct member 10 , a second duct member 20 and a connecting member 30 . The first duct member 10, the second duct member 20, and the connecting member 30 are made of, for example, hard synthetic resin such as ABS resin or polypropylene. The first duct member 10 is arranged on a low surface 6 formed on the stepped portion 5 . The second duct member 20 is arranged on the elevated surface 8 formed on the stepped portion 5 . The connecting member 30 is interposed between the first duct member 10 and the second duct member 20 and is rotatably connected thereto.

The first duct member 10 has a first duct 11 and a first connection duct 12 connected to the first duct 11 , and the first connection duct 12 is connected to one end of the connection member 30 . The second duct member 20 has a second duct 21 and a second connection duct 22 connected to the second duct 21 , and the second connection duct 22 is connected to the other end of the connection member 30 . .

In the present embodiment, when the stepped joint cover 1 is arranged straddling the upper and lower stepped portions 5, 5 as shown in FIGS. Concatenated.

In this embodiment, the first duct member 10 is formed separately by the first duct 11 and the first connection duct 12, but the first duct 11 and the first connection duct 12 are integrally formed. may Similarly, the second duct member 20 is also formed separately with the second duct 21 and the second connection duct 22, but the second duct 21 and the second connection duct 22 may be formed integrally.

Next, specific configurations of the first duct member 10, the second duct member 20, and the connecting member 30 of this embodiment will be described with reference to FIGS. 3 to 6. FIG.

FIG. 3 is an enlarged cross-sectional view showing a state in which the stepped joint covers of the embodiment are respectively installed on the upper and lower stepped portions. FIG. 4 is a cross-sectional view showing the first duct member or the second duct member in the step joint cover of the same embodiment. FIG. 5 is a cross-sectional view showing a connecting member in the stepped joint cover of the same embodiment. FIG. 6 is a cross-sectional view showing a state in which a connecting member is connected to the first duct member or the second duct member in the step joint cover of the same embodiment. 7A and 7B are views showing a state in which the stepped joint cover of the embodiment is installed without a step, in which FIG. 7A is a side view and FIG. 7B is a longitudinal sectional view.

As shown in FIG. 3, the first duct 11 and the first connection duct 12 of the first duct member 10 are each divided into two in the circumferential direction. Similarly, the second duct 21 and the second connection duct 22 of the second duct member 20 are also divided into two in the circumferential direction.

As shown in FIGS. 3 and 4, the first connection duct 12 of the first duct member 10 includes a first duct base portion 13 arranged on the lower surface 6 side, and a first duct base portion 13 attached to the first duct base portion 13. A first duct cover portion 14 is provided. The first duct base portion 13 and the first duct cover portion 14 are each formed to have a U-shaped cross section.

As shown in FIG. 4, the first duct base portion 13 is formed with an engaged portion 13a over the entire length thereof. On the other hand, the first duct cover portion 14 is formed with an engaging portion 14a along the entire length thereof. By engaging the engaging portion 14a of the first duct cover portion 14 with the engaged portion 13a of the first duct base portion 13, the tubular integrated first duct member 10 is formed.

Similarly, the second connecting duct 22 of the second duct member 20 also has a second duct base portion 23 arranged on the high surface 8 side and a second duct cover portion 24 attached to the second duct base portion 23 . and The second duct base portion 23 and the second duct cover portion 24 are each formed to have a U-shaped cross section.

The second duct base portion 23 is formed with an engaged portion 23a along the entire length thereof. On the other hand, the second duct cover portion 24 is formed with an engaging portion 24a along the entire length thereof. By engaging the engaging portion 24a of the second duct cover portion 24 with the engaged portion 23a of the second duct base portion 23, the tubular integrated second duct member 20 is formed.

Therefore, the first duct member 10 and the second duct member 20 are formed in substantially the same shape as shown in FIG. 4, with the only difference being the direction of openings described later.

The first duct base portion 13 and the first duct cover portion 14 are integrally provided with stoppers 13b and 14b for locking at a predetermined position when the first duct 11 is inserted so as to protrude radially. formed.

Similarly, the second duct base portion 23 and the second duct cover portion 24 are integrally provided with stoppers 23b and 24b that radially protrude for locking at predetermined positions when the second duct 21 is inserted. is formed to

The first duct base portion 13 and the first duct cover portion 14 are integrally formed with screw fixing portions 13c and 14c, respectively. The screw fixing portion 13c of the first duct base portion 13 is formed in a convex shape, while the screw fixing portion 14c of the first duct cover portion 14 is formed in a concave shape so that they can be fitted together. . Therefore, the first duct cover portion 14 is fixed to the first duct base portion 13 by fitting the screw fixing portion 14c to the screw fixing portion 13c and fastening a screw (not shown) to them.

Similarly, the second duct base portion 23 and the second duct cover portion 24 are integrally formed with screw fixing portions 23c and 24c, respectively. The screw fixing portion 23c of the second duct base portion 23 is formed in a convex shape, while the screw fixing portion 24c of the second duct cover portion 24 is formed in a concave shape so that they can be fitted together. . Therefore, the second duct cover portion 24 is fixed to the second duct base portion 23 by fitting the screw fixing portion 24c to the screw fixing portion 23c and fastening a screw (not shown) to them.

As shown in FIGS. 3 and 5, the connecting member 30 is divided into two parts in the circumferential direction, and includes a connecting base portion 31 installed on the side of the wall surface 2 and a connecting cover portion 32 attached to the connecting base portion 31. I have. An engaged portion 31a is formed on the connecting base portion 31 along the entire length thereof. On the other hand, the connecting cover portion 32 is formed with an engaging portion 32a along the entire length thereof. By engaging the engaging portion 32a of the connecting cover portion 32 with the engaged portion 31a of the connecting base portion 31, the connecting member 30 integrated into a tubular shape is formed.

The engaged portion 31a of the connecting base portion 31 and the engaging portion 32a of the connecting cover portion 32 are configured such that their attachment positions in the longitudinal direction can be changed. Further, the engaged portion 31a of the connecting base portion 31 and the engaging portion 32a of the connecting cover portion 32 are configured so that their diameters can be reduced and expanded. Specifically, with respect to the engaged portion 31a of the connecting base portion 31, the engaging portion 32a of the connecting cover portion 32 is configured such that the engagement width in the circumferential direction can be changed. The engagement width is from the position where the engaging portion 32a is in close contact with the engaged portion 31a (the position where the diameter is the most reduced) to the position just before it separates (the position where the diameter is the most expanded).

The width of engagement is determined by the width of overlap between the engaged portion 31a and the engaging portion 32a. That is, increasing the overlapped width of the engaged portion 31a and the engaging portion 32a increases the engagement width, while shortening the overlapped width results in a shorter engagement width.

As shown in FIGS. 3 and 6, one end of the first duct base portion 13 of the first duct member 10 and one end of the connection base portion 31 of the connection member 30 are rotatably connected via a first base rotation shaft 33. It is The second duct base portion 23 of the second duct member 20 and the other end of the connection base portion 31 of the connection member 30 are rotatably connected via a second base rotation shaft 34 .

As shown in FIGS. 5 and 6, the first base rotation shaft 33 and the second base rotation shaft 34 are formed integrally with the connection base portion 31 of the connection member 30, respectively. As shown in FIGS. 4 and 6, a first base rotation shaft 33 and a second base rotation shaft 34 are rotatably engaged with the first duct base portion 13 and the second duct base portion 23, respectively. Engagement recesses 15 and 25 are formed. Here, the first duct base portion 13 and the second duct base portion 23 are configured to be elastically deformable. Therefore, by elastically deforming the first duct base portion 13 and the second duct base portion 23 so as to open outward, respectively, the first base rotating shaft 33 and the second base rotating shaft 34 are attached to the engaging recesses 15 and 25 . can be engaged with each other.

Therefore, in this embodiment, as shown in FIG. A base unit 35 is configured by connecting the other end of the connecting base portion 31 with the second base rotation shaft 34 .

As shown in FIGS. 3 and 6, in this embodiment, one end of the first duct cover portion 14 of the first duct member 10 and one end of the connecting cover portion 32 of the connecting member 30 are connected to each other via the first cover rotating shaft 36. It is rotatably connected. The second duct cover portion 24 of the second duct member 20 and the other end of the connection cover portion 32 of the connection member 30 are rotatably connected via a second cover rotation shaft 37 .

As shown in FIGS. 5 and 6, the first cover rotating shaft 36 and the second cover rotating shaft 37 are formed integrally with the connecting cover portion 32 of the connecting member 30, respectively. As shown in FIGS. 4 and 6, a first cover rotation shaft 36 and a second cover rotation shaft 37 are rotatably engaged with the first duct cover portion 14 and the second duct cover portion 24, respectively. Engagement recesses 16, 26 are formed. Here, the first duct cover portion 14 and the second duct cover portion 24 are configured to be elastically deformable. Therefore, by elastically deforming the first duct cover portion 14 and the second duct cover portion 24 so as to open outward, respectively, the first cover rotating shaft 36 and the second cover rotating shaft 37 are attached to the engaging recesses 16 and 26 . can be engaged with each other.

Therefore, in this embodiment, as shown in FIG. A cover unit 38 is configured by connecting the other end of the connecting cover portion 32 via a second cover rotating shaft 37 .

In this embodiment, as shown in FIG. 3, the distance D1 between the first base rotation shaft 33 and the second base rotation shaft 34 and the distance between the first cover rotation shaft 36 and the second cover rotation shaft 37 are D2 is set to be the same. That is, the first duct member 10 and the second duct member 20 are connected via the connecting member 30 so as to form a parallel crank mechanism.

Further, in the present embodiment, as shown in FIG. 7, the first base rotation shaft 33 is arranged to be shifted toward the connecting member 30 with respect to the first cover rotation shaft 36 . The second cover rotation shaft 37 is arranged to be shifted toward the connecting member 30 with respect to the second base rotation shaft 34 .

As shown in FIG. 3, the second duct 21 is formed of the same material as the first duct member 10 and the second duct member 20, and is attached to the second base portion 28 and the second base portion 28. A second cover portion 29 is provided. The second base portion 28 and the second cover portion 29 are each formed to have a U-shaped cross section. The outer diameter of the second duct 21 is formed such that it can be inserted through the inner diameter of the second duct member 20 .

Like the first duct member 10 and the second duct member 20, the second base portion 28 is formed with an engaged portion (not shown) over the entire length in the longitudinal direction. On the other hand, like the first duct member 10 and the second duct member 20, the second cover portion 29 is formed with an engaging portion (not shown) over the entire length in the longitudinal direction. By engaging the engaging portion of the second cover portion 29 with the engaged portion of the second base portion 28, the second duct 21 integrated in a tubular shape is formed.

Next, changes in the relative positions of the first duct member 10, the second duct member 20, and the connecting member 30 due to the presence or absence of a step and changes in the size of the step in the stepped joint cover of this embodiment are shown in FIGS. 9.

FIG. 8 is a view showing a state where the stepped joint cover of the same embodiment is installed with a step of 15 mm, (a) is a side view, and (b) is a vertical cross-sectional view. FIG. 9 is a view showing a state in which the stepped joint cover of the same embodiment is installed with a step of 30 mm, (a) is a side view, and (b) is a vertical cross-sectional view.

As shown in FIGS. 7 to 9, the first duct member 10 is formed with a connecting opening 17 that connects with one end of the connecting member 30 . The opening 17 is inclined so that the portion close to the wall surface 2 protrudes toward the connecting member 30 more than the portion away from the wall surface 2 .

The second duct member 20 is formed with a connection opening 27 that is connected to the other end of the connection member 30 . Contrary to the first duct member 10, the opening 27 is inclined so that the portion spaced from the wall surface 2 protrudes toward the connecting member 30 more than the adjacent portion.

As shown in FIG. 7(b), when the stepped joint cover 1 is installed without a step, the attachment position of the connecting cover portion 32 with respect to the connecting base portion 31 of the connecting member 30 changes rightward. . 7A and 7B, the engaging portion 32a of the connecting cover portion 32 is in close contact with the engaged portion 31a of the connecting base portion 31. As shown in FIG.

As shown in FIG. 8B, when the stepped joint cover 1 is installed with a step of 15 mm (the angle of the connecting member is 15°), the connecting cover portion 32 is attached to the connecting base portion 31 of the connecting member 30. The position does not change in the longitudinal direction and is in an overlapping position. 8A and 8B, the engaging portion 32a of the connecting cover portion 32 is in close contact with the engaged portion 31a of the connecting base portion 31, and the engaged state is maintained. while being separated by about 2 mm.

As shown in FIG. 9B, when the stepped joint cover 1 is installed with a step of 30 mm (the angle of the connecting member is 30°), the connecting cover portion 32 is attached to the connecting base portion 31 of the connecting member 30. The position has changed to the left. 9A and 9B, the engaging portion 32a of the connecting cover portion 32 is in close contact with the engaged portion 31a of the connecting base portion 31. As shown in FIG.

Next, a construction example in which the step joint cover 1 is installed at a step of 30 mm, a construction example in which the step is installed at a step of 15 mm, and a construction example in which the step joint cover 1 is installed at different heights above and below will be described with reference to FIGS. 10 to 12.

FIG. 10 is a side view (a) and a vertical cross-sectional view (b) of the stepped joint cover of the same embodiment after construction with a step of 30 mm. FIG. 11 is a side view showing a state in which the stepped joint cover of the same embodiment is constructed with a step of 15 mm. FIG. 12 is a side view showing a state in which the stepped joint cover of the same embodiment is applied to different steps on the upper and lower sides.

As shown in FIGS. 10(a) and 10(b), first, the first duct base portion 13 of the first connection duct 12 in one of the base units 35 is screwed onto the lower surface 6 of the upper stepped portion 5 of the projecting portion 4. 9.

Next, after inserting the base portion of the first duct 11 into the first duct base portion 13, one of the connecting members 30 is rotated so that the connecting base portion 31 straddles the curved wall 7 of the upper stepped portion 5, and The second duct base portion 23 of the second connection duct 22 in the base unit 35 is fixed to the high surface 8 of the stepped portion 5 above the projecting portion 4 with screws 9 .

Here, before fixing the second duct base portion 23 of the second connection duct 22 to the stepped portion 5 on the upper portion of the projecting portion 4, the rotational position of the second duct base portion 23 with respect to one of the connecting members 30 is not shown. You may make it fix using a fixing member. The same applies to the second duct base portion 23 for the other connecting member 30 . In addition, the same applies to each embodiment of the stepped joint cover unit.

In this case, the second base rotating shaft 34 is arranged so that the second duct base portion 23 does not normally rotate easily with respect to the connecting member 30 and can only be rotated by a rotating operation of the installer. may be configured. By configuring in this way, it is not necessary to separately use the fixing member, and construction is facilitated.

Then, after fixing the second duct base portion 23 of the second connection duct 22 in the other base unit 35 to the high surface 8 of the lower stepped portion 5 of the projecting portion 4 with screws 9, the upper second duct base portion 23 is fixed. The base portion of the second duct 21 is inserted between the lower end and the upper end of the lower second duct base portion 23 .

Next, the other connecting member 30 is rotated so that the connecting base portion 31 straddles the curved wall 7 of the lower stepped portion 5, and the first duct base portion 13 of the first connection duct 12 in the other base unit 35 is protruded. It is fixed by a screw 9 to the low surface 6 of the lower stepped portion 5 of 4 . The base portion of the first duct 11 is inserted into the first duct base portion 13 . For example, the piping 3 is incorporated in the upper and lower base units 35 fixed in this manner.

Then, the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the upper portion, and the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the lower portion. Then, the cover portion of the second duct 21 is fitted into the base portion of the second duct 21 .

After that, in one cover unit 38, the engaging portion 14a of the first duct cover portion 14 is engaged with the engaged portion 13a of the first duct base portion 13, and the screw fixing portion 14c is engaged with the screw fixing portion 13c. The first duct cover portion 14 is fixed to the first duct base portion 13 by aligning them and fastening the screws 9 to them.

Similarly, in one cover unit 38, the engaging portion 24a of the second duct cover portion 24 is engaged with the engaged portion 23a of the second duct base portion 23, and the screw fixing portion 24c is connected to the screw fixing portion 23c. The second duct cover portion 24 is fixed to the second duct base portion 23 by engaging them and fastening the screws 9 to them.

Next, in the other cover unit 38, the engaging portion 24a of the second duct cover portion 24 is engaged with the engaged portion 23a of the second duct base portion 23, and the screw fixing portion 24c is engaged with the screw fixing portion 23c. The second duct cover portion 24 is fixed to the second duct base portion 23 by aligning them and fastening the screws 9 to them.

In the other cover unit 38, the engaging portion 14a of the first duct cover portion 14 is engaged with the engaged portion 13a of the first duct base portion 13, and the screw fixing portion 14c is engaged with the screw fixing portion 13c. The first duct cover portion 14 is fixed to the first duct base portion 13 by aligning them and fastening the screws 9 to them.

When the construction is performed with a step of 30 mm in this way, as shown in FIG. . Also, the attachment position of the connecting cover portion 32 is shifted upward with respect to the connecting base portion 31 of the other connecting member 30 .

As shown in FIG. 11, when the stepped joint cover 1 is constructed with a step of 15 mm, the attachment position of the connecting cover portion 32 overlaps the connecting base portion 31 of the connecting member 30 without changing in the length direction. position. Further, in this case, the engaging portion 32a of the connecting cover portion 32 is separated from the engaged portion 31a of the connecting base portion 31 by about 2 mm while maintaining the engaged state.

When the stepped joint cover 1 is constructed with a step of 15 mm, the construction order and construction method are the same as in the case of construction with a step of 30 mm, so the description thereof will be omitted.

FIG. 12 shows a case where the stepped joint cover 1 is constructed such that the upper stepped portion 5 has a step of 30 mm and the lower stepped portion 5 has a step of 15 mm, for example. When the upper stepped portion 5 has a step of 30 mm, as in FIG. .

11, the engaging portion 32a of the connecting cover portion 32 maintains the engaged state with the engaged portion 31a of the connecting base portion 31. and are spaced apart by about 2 mm.

As described above, according to the stepped joint cover 1 of the present embodiment, the connecting member 30 is rotatably connected to the first duct member 10 and the second duct member 20, and the connecting angle is provided on the wall surface. Since it is configured to be adjustable according to the height of the stepped portion, it is possible to correspond to the stepped portion 5 of the wall surface 2 having different heights, and the versatility can be greatly enhanced. As a result, usability is improved when the stepped joint cover 1 is constructed.

Further, according to this embodiment, the distance D1 between the first base rotation shaft 33 and the second base rotation shaft 34 and the distance D2 between the first cover rotation shaft 36 and the second cover rotation shaft 37 are Since they are the same, a parallel crank mechanism is constructed, and when either one of the first duct member 10 and the second duct member 20 is fixed, the other is translated. As a result, even if the height of the step portion 5 changes, it can be easily accommodated.

Furthermore, according to the present embodiment, the first base rotation shaft 33 is arranged to be shifted closer to the connecting member 30 than the first cover rotation shaft 36, while the second cover rotation shaft 37 is arranged at the second Since the base rotating shaft 34 is shifted toward the connecting member 30 side, even if the connecting angle of the connecting member 30 changes according to the height of the stepped portion 5, the length of the connecting member 30 does not change. , the height of the step portion 5 can be followed. Therefore, the usability in constructing the stepped joint cover 1 is further improved.

According to this embodiment, the connection member 30 is configured such that the attachment positions of the connection base portion 31 and the connection cover portion 32 in the longitudinal direction can be changed relative to each other. 17 and the area of the opening 27 of the second duct member 20, and without changing the length of the connecting member 30, the height of the stepped portion 5 can be followed. Therefore, the usability in constructing the stepped joint cover 1 is further improved.

Further, according to the present embodiment, the connecting member 30 is configured such that the diameter of the connecting base portion 31 and the connecting cover portion 32 can be reduced and expanded. 17 and the area of the opening 27 of the second duct member 20, and without changing the length of the connecting member 30, the height of the stepped portion 5 can be followed. Therefore, the usability in constructing the stepped joint cover 1 is further improved.

In the present embodiment, the stepped joint cover 1 has a stepped portion 5 with a stepped portion 5 of 30 mm and a stepped portion 5 with a stepped portion of 15 mm. The stepped portion 5 with other heights can be accommodated depending on the area, the area of the opening 27 of the second duct member 20, the length of the connecting member 30, and the like.

[First Embodiment of Step Joint Cover Unit]
13A and 13B are views showing a construction state of the stepped joint cover unit according to the first embodiment of the present invention, where (a) is an exploded perspective view and (b) is a side view.

In addition, in each embodiment of the stepped joint cover unit described below, the same reference numerals are given to the same or corresponding parts as in the embodiment of the stepped joint cover 1 described above, and overlapping explanations will be omitted.

In addition, the stepped joint cover unit described below means that the stepped joint covers 1, 1 are arranged on the stepped portions 5, 5 formed on the upper and lower sides of the protruding portion 4, respectively, and these stepped joint covers 1, 1 are It is integrated by a common second connection duct 22 or integrated by connecting the second ducts 21 to the upper and lower second connection ducts 22 , 22 .

As shown in FIGS. 13(a) and 13(b), the step joint cover unit 40 of this embodiment differs from the step joint cover 1 of the embodiment described above in that the second duct member 20 has a second duct 21. They are not connected, and the two second connection ducts 22 extend vertically and are integrated with each other.

The projecting portion 4 shown in FIGS. 13A and 13B is formed wider in the vertical direction than the projecting portion 4 described in the embodiment of the stepped joint cover 1 described above. The stepped joint cover unit 40 of the present embodiment is also arranged across the protruding portion 4 having the stepped portions 5, 5 formed on both upper and lower sides.

The stepped joint cover unit 40 includes a second duct member 20 arranged on the high surface 8 of the stepped portion 5, connecting members 30, 30 arranged on both sides of the second duct member 20, and these connecting members. a first duct member 10, 10 connected to 30, 30 respectively. The second connection duct 22 has the same length as the vertical width of the protrusion 4 .

The stepped joint cover unit 40 includes a base unit 41 and a cover unit 42 attached to the base unit 41 . The base unit 41 includes a second duct base portion 23 of the second duct member 20, connection base portions 31, 31 rotatably connected to both the upper and lower ends of the second duct base portion 23, and a connection between these. The first duct base portions 13, 13 are rotatably connected to the base portions 31, 31, respectively.

That is, in the base unit 41, the second duct base portion 23, the upper and lower connecting base portions 31, 31, and the upper and lower first duct base portions 13, 13 are integrated with each other via the rotation shaft.

The cover unit 42 includes the second duct cover portion 24 of the second duct member 20, the connecting cover portions 32, 32 rotatably connected to both the upper and lower ends of the second duct cover portion 24, and the connection between these. First duct cover portions 14, 14 are rotatably connected to the cover portions 32, 32, respectively.

That is, in the cover unit 42, the second duct cover portion 24, the upper and lower connection cover portions 32, 32, and the upper and lower first duct cover portions 14, 14 are integrated with each other via the rotation shaft.

Next, a construction example of the step joint cover unit 40 of the present embodiment will be described.

First, the first duct base portion 13 of the first connection duct 12 in the base unit 41 is fixed to the lower surface 6 of the upper stepped portion 5 of the projecting portion 4 with screws 9 . Then, the base portion of the first duct 11 is inserted into the first connection duct 12 of the base unit 41 .

Next, the upper connection base portion 31 is rotated to straddle the curved wall 7 of the upper stepped portion 5, and the second duct base portion 23 of the second duct member 20 is moved along the length direction, For example, the second duct base portion 23 is fixed to the high surface 8 of the protruding portion 4 by screwing with screws 9 at three locations.

Further, the lower connection base portion 31 is rotated to straddle the curved wall 7 of the lower stepped portion 5 , and the first duct base portion 13 of the first connection duct 12 in the base unit 41 is connected to the projecting portion 4 . It is fixed by screws 9 to the lower surface 6 of the lower stepped portion 5 . Then, the base portion of the first duct 11 is inserted into the first connection duct 12 of the base unit 41 . For example, the piping 3 is incorporated in the base unit 41 fixed in this manner.

After that, the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the upper portion, and the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the lower portion.

Next, in the cover unit 42, the engaging portion 14a of the upper first duct cover portion 14 is engaged with the engaged portion 13a of the first duct base portion 13, and the screw fixing portion 14c is engaged with the screw fixing portion 13c. The first duct cover portion 14 is fixed to the first duct base portion 13 by fitting them together and fastening the screws 9 to them.

Then, the engaging portion 24a of the second duct cover portion 24 is engaged with the engaged portion 23a of the second duct base portion 23, the screw fixing portion 24c is engaged with the screw fixing portion 23c, and the screw 9 is screwed onto them. are fastened to fix the second duct cover portion 24 to the second duct base portion 23 .

Further, in the cover unit 42, the engaging portion 14a of the lower first duct cover portion 14 is engaged with the engaged portion 13a of the first duct base portion 13, and the screw fixing portion 14c is fitted to the screw fixing portion 13c. The first duct cover portion 14 is fixed to the first duct base portion 13 by aligning them and fastening the screws 9 to them.

In this embodiment, first, the first duct base portion 13 is fixed to the lower surface 6 of the upper step portion 5 of the projecting portion 4. It may be fixed to the low surface 6 of the lower stepped portion 5 . Alternatively, the second duct base portion 23 may be fixed to the high surface 8 of the stepped portion 5 before fixing the first duct base portion 13 . In short, the construction order of the step joint cover unit 40 of the present embodiment can be appropriately changed depending on the situation at the site.

As described above, according to the stepped joint cover unit 40 of the present embodiment, the second duct member 20 of the stepped joint cover 1 arranged on the high surface 8 of the stepped portion 5 and the Since there are provided connecting members 30 and the first duct members 10 connected to these connecting members 30 respectively, it is possible to deal with protrusions 4 having different heights and different widths on the wall surface 2, thereby increasing versatility. can be significantly increased. As a result, the usability in constructing the stepped joint cover unit 40 is improved.

In addition, according to this embodiment, the two second connection ducts 22 extend vertically and are integrated with each other, so the number of parts is reduced. Therefore, it is possible to reduce the number of construction man-hours.

[Second Embodiment of Step Joint Cover Unit]
14A and 14B are views showing a construction state of the stepped joint cover unit according to the second embodiment of the present invention, in which FIG. 14A is an exploded perspective view and FIG. 14B is a longitudinal sectional view. 15A and 15B are diagrams showing a construction state in which the second duct of the stepped joint cover unit according to the second embodiment is shortened, where (a) is an exploded perspective view and (b) is a longitudinal sectional view. FIG. 16 is a cross-sectional view showing an exploded engagement state of the second duct member of the step joint cover unit according to the second embodiment. FIG. 17 is a cross-sectional view showing an engaged state of the second duct member of the step joint cover unit according to the second embodiment.

Note that the stepped joint cover unit of this embodiment and a third embodiment to be described later can cope with the case where the second duct base portion 23 cannot be screwed to the projecting portion 4, and the vertical direction of the projecting portion 4 can be adjusted. It is designed to be capable of coping with changes in width.

Here, the case where the projecting portion 4 cannot be screwed to the projecting portion 4 is, for example, the case where the projecting portion 4 is covered with a hard material such as metal and cannot be easily screwed thereon, or the case where the projecting portion 4 has a hollow cross-sectional shape or an uneven cross-sectional shape. This is the case, for example, when it is formed and cannot be screwed due to its shape.

14(a) and (b) show an example applied to the protruding portion 4 with a wide vertical width, and FIGS. b) shows an example applied to a projection 4 narrower than b).

As shown in FIGS. 14A and 14B, the step joint cover unit 50 of this embodiment includes a base unit 51 and a cover unit 52 attached to the base unit 51 . The base unit 51 of this embodiment includes a second base portion 28 of the second duct member 20, second duct base portions 23, 23 connected to the upper and lower sides of the second base portion 28, and these second ducts. The connection base portions 31, 31 rotatably connected to the base portions 23, 23, respectively, and the first duct base portions 13, 13 rotatably connected to the connection base portions 31, 31, respectively. Prepare.

In the step joint cover unit 50 of this embodiment, the second base portion 28 and the lower second duct base portion 23 are integrated. Similarly, in the stepped joint cover unit 50, the second cover portion 29 and the lower second duct cover portion 24 are integrated.

The second base portion 28 and the second cover portion 29 are formed to have the same length. The second base portion 28 and the second cover portion 29 are each formed with two cutting guide grooves 53 at the same lengthwise position. These cutting guide grooves 53 can be cut using a cutting tool such as a cutter knife (not shown) to partially cut off the second base portion 28 and the second cover portion 29 .

As shown in FIGS. 14(a), 16 and 17, the second base portion 28 is provided between its upper end and the cutting guide groove 53, between the cutting guide groove 53 and the cutting guide groove 53, and between the cutting guide groove 53 and the cutting guide groove. Side engaging portions 54 are integrally formed on both side surfaces between 53 and the lower end. That is, the side engaging portion 54 is formed over three stages, upper and lower.

As shown in FIGS. 16 and 17, the second base portion 28 is provided between its upper end and the cutting guide groove 53, between the cutting guide groove 53 and the cutting guide groove 53, and between the cutting guide groove 53 and the lower end. A bottom engaging portion 55 is integrally formed on the bottom surface facing the protruding portion 4 side of each. The bottom engaging portion 55 is also formed over three stages, upper and lower. These bottom engaging portions 55 are formed at the same position with respect to the length direction of each side engaging portion 54 and the second base portion 28 .

Further, side engaged portions 58 are formed at two upper and lower positions on both inner side surfaces of the upper second duct base portion 23 . That is, the side engaged portion 58 is formed over two stages, upper and lower. Similarly, in the upper second duct base portion 23, bottom engaged portions 59 are formed at two upper and lower portions of the inner bottom surface. That is, the bottom engaged portion 59 is formed over two stages, upper and lower.

Therefore, in the present embodiment, the side engaging portion 54 and the bottom engaging portion 55 are each formed in three stages above and below, while the side engaged portion 58 and the bottom engaged portion 59 are formed in two stages above and below. Therefore, the length can be adjusted in a total of 6 stages (3 stages x 2 stages).

FIGS. 15(a) and 15(b) show a construction state in which the second duct 21 of the stepped joint cover unit 50 is shortened. Specifically, it shows the case where the second base portion 28 and the second cover portion 29 are cut by the second cutting guide groove 53 from the upper end.

Next, a construction example of the step joint cover unit 50 of the present embodiment will be described.

First, the first duct base portion 13 of the upper first duct member 10 is fixed to the low surface 6 of the step portion 5 using screws. Then, the base portion of the first duct 11 is inserted into the first connection duct 12 of the base unit 51 .

Next, the upper connection base portion 31 is rotated so as to straddle the curved wall 7 of the upper stepped portion 5 , and the second duct base portion 23 of the second connection duct 22 in the base unit 51 is moved to the upper portion of the projecting portion 4 . It is arranged on the high surface 8 of the stepped portion 5 . Here, since the projecting portion 4 of the present embodiment cannot be screwed, the second duct base portion 23 is not fixed.

Then, the side engaging portion 54 and the bottom engaging portion 55 of the second base portion 28 are engaged with the side engaging portion 58 and the bottom engaging portion 59 of the upper second duct base portion 23, and the upper second duct base portion 23 is engaged. The second base portion 28 is positioned and fixed to the two-duct base portion 23 .

Further, the lower connection base portion 31 is rotated to straddle the bent wall 7 of the lower stepped portion 5 , and the first duct base portion 13 of the first connection duct 12 in the base unit 51 is moved to the projecting portion 4 . It is fixed by screws 9 to the lower surface 6 of the lower stepped portion 5 . Then, the base portion of the first duct 11 is inserted into the first duct base portion 13 of the base unit 51 .

Next, the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the upper portion, and the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the lower portion.

In the cover unit 52, after the second cover portion 29 is attached to the second base portion 28, the engaging portion 24a of the lower second duct cover portion 24 is replaced with the engaged portion 23a of the second duct base portion 23. The second duct cover portion 24 is fixed to the second duct base portion 23 by engaging the screw fixing portion 24c with the screw fixing portion 23c and fastening the screw 9 to them.

Similarly, in the cover unit 52, the engaging portion 24a of the upper second duct cover portion 24 is engaged with the engaged portion 23a of the second duct base portion 23, and the screw fixing portion 24c is connected to the screw fixing portion 23c. The second duct cover portion 24 is fixed to the second duct base portion 23 by fitting them together and fastening the screws 9 to them.

Next, in the cover unit 52, the engaging portion 14a of the lower first duct cover portion 14 is engaged with the engaged portion 13a of the first duct base portion 13, and the screw fixing portion 14c is fitted to the screw fixing portion 13c. The first duct cover portion 14 is fixed to the first duct base portion 13 by aligning them and fastening the screws 9 to them.

Next, the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the upper portion, and the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the lower portion.

Further, the engaging portion 14a of the upper first duct cover portion 14 is engaged with the engaged portion 13a of the first duct base portion 13, and the screw fixing portion 14c is fitted to the screw fixing portion 13c. The first duct cover portion 14 is fixed to the first duct base portion 13 by fastening the screw 9 .

As described above, according to the present embodiment, the length of the second duct 21 of the second duct member 20 is adjustable according to the width of the projecting portion 4, so that the width of the projecting portion 4 changes. However, the length of the second duct 21 can be easily made the same as the width of the projecting portion 4 . Therefore, the usability in constructing the stepped joint cover unit 50 is further improved.

Further, according to the present embodiment, the second duct 21 of the second duct member 20 has a plurality of cutting guide grooves 53 formed in the longitudinal direction that can be cut off. The length of the duct 21 can be made substantially the same as the width of the projecting portion 4 . Therefore, the usability in constructing the stepped joint cover unit 50 is further improved.

Furthermore, according to this embodiment, the side engaging portion 54 and the bottom engaging portion 55 of the second base portion 28 are engaged with the side engaging portion 58 and the bottom engaging portion 59 of the second duct base portion 23 . By positioning the second base portion 28 on the second duct base portion 23 on the upper side, each member is fixed via the second base portion 28 even if it cannot be screwed to the projecting portion 4 . Therefore, it is possible to prevent the second duct member 20 from floating or coming off after construction.

In this embodiment, the side engaging portion 54 and the bottom engaging portion 55 are each formed in three stages, while the side engaged portion 58 and the bottom engaged portion 59 are formed in two stages. , but if more steps are formed, more steps of length adjustment are possible.

[Third Embodiment of Step Joint Cover Unit]
18A and 18B are diagrams showing a construction state of the stepped joint cover unit according to the third embodiment of the present invention, where (a) is an exploded perspective view and (b) is a longitudinal sectional view. 19A and 19B are views showing a construction state in which the second duct member of the step joint cover unit according to the third embodiment is installed short, where (a) is an exploded perspective view and (b) is a longitudinal sectional view.

18(a) and (b) show an example applied to the protruding portion 4 with a wide vertical width, and FIGS. b) shows an example applied to a projection 4 narrower than b). In addition, in the present embodiment, the same reference numerals are given to the same or corresponding parts as the stepped joint cover unit of the second embodiment, and redundant explanations will be omitted.

Unlike the step joint cover unit of the second embodiment, this embodiment adjusts the length of the second duct member 20 including the second duct 21 without forming the cutting guide groove 53 in the second duct 21. configured as possible.

As shown in FIGS. 18(a) and 18(b), the step joint cover unit 60 of this embodiment includes a base unit 61 and a cover unit 62 attached to the base unit 61. As shown in FIGS. The base unit 61 of this embodiment includes the second base portion 28 of the second duct member 20, the upper and lower second duct base portions 23, 23, and the upper and lower ends of these second duct base portions 23, 23. It includes connecting base portions 31, 31 rotatably connected, and first duct base portions 13, 13 rotatably connected to these connecting base portions 31, 31, respectively.

The second base portion 28 and the second cover portion 29 are formed to have the same length. As shown in FIGS. 18(a) and 19(a), the second base portion 28 has side engaging portions 64 integrally formed on both side surfaces in the length direction. That is, the side engaging portion 64 is formed over two stages, upper and lower.

The second base portion 28 is integrally formed with a bottom engaging portion (not shown) on the bottom surface facing the projecting portion 4 side. This bottom engaging portion is also formed over two upper and lower stages. These bottom engaging portions are formed at the same positions in the longitudinal direction of each side engaging portion 64 and the second base portion 28 .

Further, side engaged portions 68 are formed at two upper and lower positions on both inner side surfaces of the upper and lower second duct base portions 23 , 23 . That is, the side engaged portion 68 is formed over two stages, upper and lower.

Similarly, the second duct base portions 23, 23 of the upper and lower portions are formed with bottom engaged portions 69 at two upper and lower portions of the inner bottom surface, respectively. That is, the bottom engaged portion 69 is also formed over two stages, upper and lower.

Therefore, in this embodiment, the side engaging portion 64 and the bottom engaging portion (not shown) are formed in two upper and lower stages, while the side engaged portion 68 and the bottom engaged portion 69 are formed in two upper and lower stages. Since it is formed over the length, it is possible to adjust the length in three steps.

That is, in this embodiment, by changing the engaging positions of the side engaging portion 64 and the bottom engaging portion 65 with respect to the engaged positions of the side engaging portion 68 and the bottom engaging portion 69, the second 2 duct member 20 can be adjusted in three stages.

Next, a construction example of the step joint cover unit 60 of the present embodiment will be described.

First, the second duct base portions 23 , 23 of the upper and lower second connection ducts 22 , 22 in the base unit 61 are arranged on the high surface 8 of the upper stepped portion 5 of the projecting portion 4 .

Then, the side engaging portion 64 and the bottom engaging portion of the second base portion 28 are engaged with the side engaging portion 68 and the bottom engaging portion 69 of the second duct base portion 23 in the upper and lower portions, thereby The second base portion 28 is positioned and fixed to the second duct base portion 23 .

After that, the first duct base portion 13 of the upper first duct member 10 is fixed to the lower surface 6 of the stepped portion 5 using screws. Then, the base portion of the first duct 11 is inserted into the first connection duct 12 of the base unit 51 .

Further, the first duct base portion 13 of the first connection duct 12 in the base unit 61 is fixed to the lower surface 6 of the lower stepped portion 5 of the projecting portion 4 with screws 9 . Then, the base portion of the first duct 11 is inserted into the first duct base portion 13 of the base unit 61 .

Next, the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the upper portion, and the cover portion of the first duct 11 is fitted to the base portion of the first duct 11 in the lower portion.

In the cover unit 62 , after the second cover portion 29 is attached to the second base portion 28 , the engaging portion 24 a of the upper second duct cover portion 24 is replaced with the engaged portion 23 a of the second duct base portion 23 . The second duct cover part 24 is fixed to the upper second duct base part 23 by engaging the screw fixing part 24c with the screw fixing part 23c and fastening the screw 9 to them. The second duct cover portion 24 is fixed to the lower second duct base portion 23 by a similar construction method.

Next, the upper first duct cover portion 14 is fixed to the upper first duct base portion 13 by a construction method similar to that of the second embodiment, and the lower first duct cover portion 14 is fixed to the lower first duct base portion 13. The duct cover portion 14 is fixed.

FIGS. 19(a) and 19(b) show an installed state in which the second duct member 20 of the stepped joint cover unit 60 is shortened. Specifically, both ends of the second base portion 28 and the second cover portion 29 are inserted into the innermost side of the second duct base portion 23 and the second duct cover portion 24, and the second duct member 20 is pushed to the innermost side. The case of forming short is shown.

The rest of the configuration, operation, and construction method are substantially the same as those of the stepped joint cover unit of the second embodiment, so description thereof will be omitted.

As described above, according to the present embodiment, the length of the second duct 21 can be adjusted by changing the engagement position of the second duct 21 with respect to the second connection ducts 22 , 22 in the vertical direction. As a result, unlike the stepped joint cover unit 50 of the second embodiment, the length of the second duct 21 is not adjusted by cutting it off from the cutting guide groove. As a result, the work of adjusting the length of the second duct 21 is facilitated, which in turn facilitates construction.

It goes without saying that each of the above-described embodiments is an illustration of the present invention, and that the present invention is not limited only to each of the above-described embodiments. These embodiments can be implemented in various other forms, and various omissions, replacements, changes, and combinations can be made without departing from the scope of the invention. These embodiments are included in the scope and gist of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

For example, the stepped joint cover of one embodiment and the stepped joint cover unit of each embodiment described above have been described as examples in which they are installed across projections having stepped portions on the top and bottom of the wall surface, respectively, but the present invention is limited to this. For example, it can be applied to a wall surface on which one stepped portion is formed at the top and bottom.

Moreover, although the step joint cover of one embodiment and the step joint cover unit of each embodiment described above are provided with protrusions having stepped portions on the upper and lower sides of the wall surface, respectively, the examples are not limited to this. For example, the present invention can be applied to those in which further protrusions are formed on the stepped surfaces of the protrusions. In short, any wall surface can be applied as long as it is a wall surface on which a stepped portion is formed.

Furthermore, in the stepped joint cover of one embodiment and the stepped joint cover unit of each of the embodiments described above, an example in which the upper surface of the protruding portion is formed in a flat shape has been described. By combining a plurality of joint covers, the present invention can be applied to a projecting part having unevenness on the upper surface thereof.

1 step joint cover 2 wall surface 3 pipe 4 projecting portion 5 step portion 6 low surface 7 curved wall 8 high surface 10 first duct member 11 first duct 12 first connection duct 13 first duct base portion 13a engaged portion 13b Stopper 13c Screw fixing portion 14 First duct cover portion 14a Engaging portion 14b Stopper 14c Screw fixing portion 15 Engagement recess 16 Engagement recess 17 Opening 20 Second duct member 21 Second duct 22 Second connection duct 23 Second Duct base portion 23a Engaged portion 23b Stopper 23c Screw fixing portion 24 Second duct cover portion 24a Engaging portion 24b Stopper 24c Screw fixing portion 25 Engagement recess 26 Engagement recess 27 Opening 28 Second base 29 Second cover Part 30 Connection member 31 Connection base part 31a Engaged part 32 Connection cover part 32a Engaging part 33 First base rotation shaft 34 Second base rotation shaft 35 Base unit 36 First cover rotation shaft 37 Second cover rotation Driving shaft 38 Cover unit 40 Step joint cover unit 41 Base unit 42 Cover unit 50 Step joint cover unit 51 Base unit 52 Cover unit 53 Cutting guide groove 54 Side engaging part 55 Bottom engaging part 58 Side engaged part 59 Bottom cover Engaging portion 60 Step joint cover unit 61 Base unit 62 Cover unit 64 Side engaging portion 68 Side engaged portion 69 Bottom engaged portion

Claims (9)

A stepped joint cover arranged over a stepped portion provided on a wall surface, formed in a tubular shape, and through which at least one of a pipe and a wiring is inserted,
a tubular first duct member arranged on a low surface formed in the stepped portion;
a tubular second duct member arranged on a high surface formed in the stepped portion;
a tubular connecting member separating an end of the first duct member and an end of the second duct member and connecting the first duct member and the second duct member; ,
with
The connecting member has one end rotatably connected to the end of the first duct member and the other end rotatably to the end of the second duct member. A stepped joint cover, wherein the stepped joint cover is connected so that the connection angle can be adjusted according to the height of the stepped portion. The first duct member and the second duct member are each divided into two in the circumferential direction, and the first duct member comprises a first duct base portion installed on the low surface side, a first duct cover portion attached to the base portion;
The second duct member includes a second duct base portion installed on the high surface side and a second duct cover portion attached to the second duct base portion,
The connecting member is divided into two parts in the circumferential direction and includes a connecting base part installed on the wall surface side and a connecting cover part attached to the connecting base part,
The first duct base portion of the first duct member and one end of the connection base portion of the connection member are rotatably connected via a first base rotation shaft, and the second duct member of the second duct member A base unit is configured by rotatably connecting the duct base portion and the other end of the connection base portion of the connection member via a second base rotation shaft,
One end of the first duct cover portion of the first duct member and one end of the connection cover portion of the connection member are rotatably connected via a first cover rotation shaft, and the second cover portion of the second duct member is rotatably connected. A cover unit is configured by rotatably connecting the duct cover portion and the other end of the connecting cover portion of the connecting member via a second cover rotating shaft,
2. A space between said first base rotating shaft and said second base rotating shaft and a space between said first cover rotating shaft and said second cover rotating shaft are the same. The stepped joint cover described in . The first base rotation shaft is arranged to be shifted closer to the connecting member than the first cover rotation shaft, and the second cover rotation shaft is arranged to be closer to the connection member than the second base rotation shaft. 3. The stepped joint cover according to claim 2, wherein the stepped joint cover is arranged with a deviation toward the member. 4. The stepped joint cover according to claim 3, wherein the connecting member is configured such that the connecting base portion and the connecting cover portion are mutually variable in attachment position in the longitudinal direction. 5. The step joint cover according to claim 3, wherein the connecting member is configured such that the diameter of the connecting base portion and the connecting cover portion can be reduced and expanded. A stepped joint cover unit that is installed on a wall surface and arranged across a protruding portion having stepped portions on both sides,
The stepped joint cover according to any one of claims 1 to 5, which is arranged at each of the stepped portions on both sides,
A step joint cover unit, wherein the second duct members of the step joint cover are connected to each other. 7. The step joint cover unit according to claim 6, wherein the length of the second duct member is adjustable according to the width of the projecting portion. 8. The stepped joint cover unit according to claim 7, wherein the second duct member has a plurality of cutting guide grooves that can be cut off in the longitudinal direction. A stepped joint cover unit that is installed on a wall surface and arranged across a protruding portion having stepped portions on both sides,
The second duct member of the stepped joint cover according to any one of claims 1 to 5, which is arranged on a high surface of the stepped portion;
the connecting members arranged on both sides of the second duct member;
the first duct members respectively connected to the connecting members;
A stepped joint cover unit comprising:

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