JP2000055290A - Duct connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent intrusion of rain water while reducing the number of parts and to improve assembly workability. SOLUTION: This duct connecting structure makes it possible to connect a first duct 1 and a second duct 2 by providing a connecting part on an end part against which the first duct 1 having a pair of a first side wall member 4A and a first cover member and the second duct 2 having a pair of a second side wall member 4B and a second cover member respectively face. In this case, the connecting part is fitted and connected in a state where the end part of the first duct 1 and the end part of the second duct 2 are overlapped with each other, and a groove M continued in the peripheral direction is formed on at least one of mating faces A of a fitting connecting part K of the first duct 1 and the second duct 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a first duct having a pair of first side wall members and a first lid member, and a second duct having a pair of second side wall members and a second lid member. The present invention relates to a duct connection structure that enables connection between the first duct and the second duct by providing a connection portion at an end of the duct.

[0002]

2. Description of the Related Art Conventionally, as this kind of duct connection structure, as shown in FIGS. 12 and 13, an end of a first duct 1 and an end of a second duct 2 are arranged in abutment along a longitudinal direction. Butted first side wall member 4A and second side wall member 4
B, and the first duct 1 in a state where the joint member 16 to be applied from the inside and the joint member 17 to be applied from the outside are sandwiched along the first lid member 5A and the second lid member 5B, and the first duct 1 is tightened with the bolts 10 respectively. The connecting portion with the second duct 2 was configured. In order to prevent water (for example, rainwater or splashed water) from entering the duct through the duct connection portion, a packing is provided between the joint member 17 applied from the outside and the outer surface of the end of each duct. 19 was interposed.

[0003]

However, according to the above-mentioned conventional duct connection structure, a joint part to be applied from the inside for both side wall members and a lid is used to constitute the connection portion between the first duct and the second duct. Similarly, the three members, the joint member to be applied from the outside, and the packing also require three members, so that the number of parts is large, and there is a problem in that assembling is troublesome. An object of the present invention is to solve the drawbacks of the prior art, reduce the number of parts, prevent water from entering the duct, and improve the workability of assembling the duct. To provide.

[0004]

According to a first aspect of the present invention, as shown in FIGS. 1 to 11, a first duct having a pair of first side wall members and a first lid member, In a duct connection structure in which the first duct and the second duct can be connected by providing a connection portion at each of opposed ends of the second side wall member and the second duct having the second lid member, The connecting portion is fitted and connected so that the end of the first duct and the end of the second duct overlap each other,
A groove continuous in the circumferential direction is formed on at least one of the mating surfaces of the fitting connection portions of the first duct and the second duct.

[0005] The characteristic structure of the invention of claim 2 is shown in Figs.
As illustrated in FIG. 11, the groove is formed by bending a plate member.

[0008] The characteristic structure of the invention of claim 3 is shown in FIGS.
As shown in the example, the fitting connection portion is formed separately from the duct main body.

[0007] As described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

According to the feature of the first aspect of the present invention, a simple structure in which the ends of the first duct and the ends of the second duct are fitted and connected in a state of being overlapped with each other and fixed. The operation makes it possible to connect the first duct and the second duct. Further, since a groove continuous in the circumferential direction is formed on at least one of the mating surfaces of the fitting connection portion, when the ends of the two ducts are fitted and connected, the groove is formed on the mating surface of the fitting connection portion. To form a continuous space in the circumferential direction. Therefore, even if rainwater enters the fitting connection part, the water is discharged to the outside of the duct by the circumferential continuous space formed by the groove before reaching the inside of the duct, which has a simple structure. Even with this, it is possible to maintain the waterproofness of the fitting connection part. In addition to adopting a fitting connection structure and not using a water-stopping member such as packing, the number of parts can be reduced as a whole and a simple structure can be achieved, reducing assembly labor and cost. Becomes possible.

According to the second aspect of the present invention, the function and effect of the first aspect can be achieved.
Since the groove is formed by bending the plate member, the groove can be formed easily, and it is easy to reduce the weight of the member as compared with the case where the groove is formed by cutting out a part. Handleability is improved.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, the fitting connection portion is formed separately from the duct main body. Therefore, it is not necessary to form the groove at the end of the duct main body, so that the structure of each member constituting the duct main body can be simplified, and the manufacturing cost can be reduced. Furthermore, if the fitting connection part formed separately is attached to one of the duct bodies in advance, the fitting connection work between the duct bodies can be easily performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a duct connection structure according to the present invention will be described below with reference to the drawings. 1 to 6 show a connection structure applicable to a straight duct in a piping duct H for air-conditioning piping provided on the roof of a building or the like. The pipe duct H is configured by connecting a first duct 1 and a second duct 2. The same applies to the connection of bent ducts,
One or both of the first duct 1 and the second duct 2 described below may be replaced with a bent duct.

The first duct 1 constituting the pipe duct H
As shown in FIGS. 1 to 6, the second duct 2 has a pipe support member 3 that can support the pipe P, and the first duct has a pair of second ducts that cover both side walls of the support space V of the pipe P. One side wall member 4A is provided, and a lid member 5A that covers the support space V of the pipe P is provided. In the second duct, a pair of first side wall members 4B that cover both side walls of the support space V of the pipe P is provided, and a lid member 5B that covers the support space V of the pipe P is provided. is there

The side wall members 4A and 4B are shown in FIGS.
As shown in (1), the upper and lower edges are bent toward the support space V to improve the bending rigidity. In addition, a fitting connection portion K is provided at an end of the first side wall member 4A facing the second side wall member 4B so that the first and second side wall members can be connected by being fitted to each other in a superposed state. It is. The second
The other end of the side wall member 4B is similarly provided with a fitting connection portion K.

The lid members 5A and 5B are shown in FIGS.
As shown in FIG. 6, an intermediate portion in the width direction is formed in a shape that bulges upward to improve bending rigidity. In addition, the lid members 5A and 5B are installed in such a manner that both side walls thereof cover the bent portions of the upper edges of the both side wall members 4A. At this time, a matching step 6 is provided on the upper edge of both side walls 4A over which both side edges of the lid member cover so that the surface is flush with the lid member 5A. And the lid member 5
The bolt insertion hole 4a of the side wall member 4A
Are provided with bolt insertion holes 5a.
Therefore, with the lid member 5A placed on the side wall member 4,
The cover member 5A can be mounted by inserting the mounting bolt 7 from the bolt insertion hole 5a into the bolt insertion hole 4a, screwing it into a nut fixed to the back side of the bolt insertion hole, and tightening. . Similarly to the first side wall member 4A, the first lid member 5A of the first duct 1 is fitted to the end facing the second lid member 5B such that the first and second side wall members overlap each other. There is provided a fitting connection portion K that can be connected by joining.

As shown in FIGS. 1 to 6, the fitting connection portion K is formed so that the mating surface A of the first side wall member 4A is aligned with the second side wall member 4B so that the outer surface is flush when the fitting connection is made. The groove M is inserted into the pipe support space V by the thickness, and a circumferentially continuous groove M is formed by bending the end of the first side wall member facing the second side wall member 4B. Accordingly, as shown in FIG. 4A, the fitting connection portion K of the first side wall member 4A is formed.
The second side wall member 4B is slid and fitted into the
As shown in FIG. 5, a bolt 10 is inserted from the bolt insertion hole 8 of the second side wall member 4B to the bolt insertion hole 9 of the first side wall member 4A and tightened so that the mating surface A comes into close contact with the groove M. The space S in the circumferential direction of the surface A
Is formed. In this way, while the entry of rainwater or the like from the mating surface A at the fitting connection portion K between the first side wall member 4 and the second side wall member 5 is prevented, even if rainwater or the like enters, the groove M is formed. Since the groove M can be expanded and contracted in the groove width direction by the bent structure of the plate member, the groove M can be easily connected while allowing a change in the interval between the connecting parts due to heat or the like. It is. The fitting connection portion K in the first lid member 5A has the same configuration. (Not shown)

Next, a procedure for connecting the pipe duct H will be described. [1] On a plurality of bases B installed at predetermined positions,
The pipe support member 3 is placed and fixed (see FIG. 2). [2] The pair of first side wall members 4A are separately mounted on the left and right sides of the pipe support members 3 adjacent in the longitudinal direction. [3] On the pipe support member 3, the pipe P
Attach. [4] The first lid member 5A is placed on the first side wall member 4A, the connection bolt 7 is inserted, and the nut is screwed and fastened to form the first duct 1 (see FIG. 1). [5] Similarly, the formed second duct 2 is slid and fitted into the fitting connecting portion K at the end of the first duct 1 from the lower side in the longitudinal direction, the connecting bolt 10 is inserted, and the nut is screwed and fastened. Thus, the connection operation is completed (see FIGS. 4 and 3).

[Another Embodiment] Another embodiment will be described below. (Since the fitting connection portion K of the lid member 5 has the same configuration, the configuration of the side wall member 4 will be mainly described.)

<1> In the above-described embodiment, the fitting connection portion K adjusts the mating surface of the first side wall member 4A by the thickness of the second side wall member 4B so that the outer surface becomes flush when fitted and connected. Only in the pipe support space V, as shown in FIG.
As shown in the figure, the fitting connection portion K of the first side wall member 4A is
The structure which fits outside and connects with the side wall member 4B may be sufficient. <2> The fitting connection portion K does not need to be formed integrally with the side wall member 4A, and as shown in FIG.
May be formed separately. At this time, when one end of the separately formed fitting connection member 12 is fastened and fixed to the first side wall member 4A with the bolt 10 in advance, the connection operation can be efficiently performed as in the present embodiment. <3> The groove M is not limited to one formed by bending,
As shown in FIG. 9, it may be by shaving. In this embodiment, it is possible to further improve the adhesion accuracy as compared with the case of the bending molding. <4> As shown in FIG. 10, grooves M may be formed on the inner surfaces of the first and second side wall members. In this embodiment, in order to make the outer surface flush, there is no need to provide a step corresponding to the thickness of the groove forming portion at the other end as in the above-described embodiment. Just tighten and fix. Therefore, the same member can be used, and the cost of parts can be easily reduced. <5> In the above-described embodiment, the fitting connection is performed by sliding from the lower side in the longitudinal direction. However, as shown in FIG. 11, the side wall member 4B of the second duct 2 is moved toward the pipe support space V side. A notch 15 may be provided at least in a portion corresponding to the fitting connection portion K in the lower edge portion formed to be bent. In this case, since the connecting operation can be performed by fitting from above, it is possible to further improve the workability. <6> In the embodiment, both the first and second ducts are formed by combining the lid member and the pair of side wall members. However, the present invention is not limited to this, and the lid member and the side wall member are integrally formed from the beginning. May be available.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a piping duct described in an embodiment.

FIG. 2 is a cross-sectional view showing a state of assembling the piping duct described in the embodiment.

FIG. 3 is a cross-sectional view showing an assembled state of the piping duct described in the embodiment.

FIG. 4 is a cross-sectional view taken along line II showing a fitting connection portion.

FIG. 5 is a sectional view showing a fitting connection state of the pipe duct described in the embodiment;

FIG. 6 is a plan view showing a fitting connection portion.

FIG. 7 is a cross-sectional view of a main part viewed from above showing a connection state according to another embodiment.

FIG. 8 is a cross-sectional view of a main part viewed from above showing a connection state of another embodiment.

FIG. 9 is a top cross-sectional view of a main part showing a connection state of another embodiment.

FIG. 10 is a cross-sectional view of a main part showing a connection state of another embodiment, viewed from above

FIG. 11 is an explanatory view for assembling a fitting connection portion according to another embodiment.

FIG. 12 is a cross-sectional view showing an assembled state of a conventional piping duct.

FIG. 13 is a sectional view taken along the line II-II showing a conventional duct connection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st duct 2 2nd duct 4A 1st side wall member 4B 2nd side wall member 5A 1st lid member 5B 2nd lid member K fitting connection part M groove A mating surface

Claims (3)

[Claims] A connecting portion is provided at each of opposed ends of a first duct having a pair of first side wall members and a first lid member, and a second duct having a pair of second side wall members and a second lid member. Providing a duct connection structure that allows the first duct and the second duct to be connected, wherein the connection portion is in a state where ends of the first duct and ends of the second duct overlap with each other. A duct connection structure which is fitted and connected, and has a circumferentially continuous groove formed in at least one of the mating surfaces of the fitting connection portions of the first duct and the second duct. 2. The duct connection structure according to claim 1, wherein the groove is formed by bending a plate member. 3. The duct connection structure according to claim 1, wherein the fitting connection portion is formed separately from the duct main body.