JPH0594595U - Joiner for duct - Google Patents

Abstract

(57) [Summary] [Purpose] When joining ducts with a joiner to make a duct, bend the joiner so that a bent duct or a round duct can be made. [Structure] The connecting portion 1 is provided with flexibility, and U-shaped connecting pieces 4 and 4 are integrally formed on both sides of the connecting portion. The end of the plate P is inserted into the groove 5 between the connection pieces 4 and 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a joiner used when a plate is joined to produce a duct.

Conventionally, there has been a duct joiner shown in FIG. In this joiner A, a groove 100 is formed by a pair of support plates 110, 110 and a connecting part 120 that integrates them, and the end of the plate 200 is inserted into the groove 100. There is. Then, in the joiner A in which the grooves 100, 100 are formed on both sides of the connecting portion 120 with the H-shaped cross-section as shown in the figure, the ends of the plate bodies 200, 200 are respectively attached to the grooves 100, 100. By inserting and adhering the insertion points with an adhesive, the plates 200, 200 are airtightly coupled together via the joiner A to form a duct wall.

[0003]

[Problems to be solved by the device]

 In such a joiner A, there is a circumstance in which the pair of support plate portions 110, 110 forming the groove 100 are required to have sufficient strength to hold the plate body 200 without wobbling. Therefore, the entire Joiner A including the connecting portion 120 is made of a hard synthetic resin molding such as a hard vinyl chloride resin molding which is hard to be deformed.

By the way, when a plate is joined to manufacture a duct, there is a demand for bending an axial middle portion of the duct, a demand for manufacturing a circular duct having a circular cross section or a polygonal cross section other than a quadrangle, and the like. is there. When the joiner A is made of a hard synthetic resin molding which is hard to be deformed as in the conventional case, in order to meet the above requirement, the grooves 100, 100 on both sides of the connecting portion 120 should be oriented toward the duct shaft. It is necessary to have a joiner A that matches the butt angle of the plates at the middle of the direction and the butt angle of the plates in the circumferential direction of the duct.

However, if such a joiner A is manufactured and an attempt is made to meet the above requirement, the joiner A is individually formed for each bending angle of the duct axial middle portion, the curvature in the duct circumferential direction, and each bending angle. It was necessary and there was a drawback that the number of types of Joiner A increased.

The present invention has been made in view of the above circumstances, and by bending the connecting portion, it is possible to change the direction of the grooves on both sides of the connecting portion, so that the groove can be inserted into the groove. By changing the abutting angle of the plates to be used, a duct joiner that can deal with the bending angle of the middle part of the duct axis direction and the curvature and bending angle in the duct circumferential direction with one type can be used. The purpose is to provide.

[0007]

[Means for Solving the Problems]

 In the duct joiner of the present invention, a pair of support plate portions are projected on both sides of the flexible connecting portion, and an end portion of the plate body is provided between the pair of support plate portions. A groove to be inserted is formed, and the connecting portion and each of the supporting plate portions are integrally formed of synthetic resin.

[0008]

[Action]

 With this configuration, it is possible to change the direction of the grooves on both sides of the connecting portion by utilizing the flexibility of the connecting portion. Therefore, it is possible to change the abutting angle of the plates inserted into those grooves.

[0009]

【Example】

 1 is a front view of a joiner A according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view of a curved duct D manufactured using the joiner A of FIG. 1, and FIG. 3 is a line III-III of FIG. It is an expanded sectional view which follows.

The joiner A shown in FIG. 1 is a U-shaped configuration having a pair of support plate portions 2 and 2 facing each other on one side of the connecting portion 1 and a wall portion 3 connecting the base portions of the support plate portions 2 and 2. While the connecting piece 4 is provided on the other side of the connecting portion 1, the connecting piece 4 is provided symmetrically with the connecting piece 4. In such a joiner A, a groove in which the ends of the plate bodies P, P shown by phantom lines in the figure are inserted between the pair of support plate portions 2, 2 in the respective connection pieces 4, 4. 5 is formed.

The connecting portion 1 is formed in a bellows shape, and the bellows shape imparts flexibility to the connecting portion 1 so that the connecting portion 1 can be expanded and contracted and bent. As a means for imparting flexibility to the connecting portion 1, it is possible to form it into a bellows shape and mold the connecting portion 1 with a flexible synthetic resin that is easily bent regardless of its shape. The connecting pieces 4, 4 are made of hard synthetic resin. Such a joiner A is manufactured by cutting a long body extruded from a synthetic resin such as polyvinyl chloride resin into a predetermined size. When the connecting portion 1 is made of a soft synthetic resin and the connecting pieces 4, 4 are made of a hard synthetic resin, the respective portions 1, 4 may be molded by a two-layer extrusion method.

In order to connect the plate bodies P, P to each other by the joiner A having such a structure, the plate body P is inserted into each of the grooves 5, 5 of the connection pieces 4, 4 on both sides of the connecting portion 1. By doing so, the plate body P is sandwiched by the pair of support plate portions 2 and 2 and held by the connection piece 4. In this case, if an adhesive is applied to the plate P or the groove 5 in advance, when the plate P is inserted into the groove 5, the gap between the plate P and the supporting plate portions 2, 2 and the wall 3 The adhesive evenly wraps around, and the plate P and the connecting piece 4 are reliably adhered by the adhesive. As the adhesive, a filling adhesive, for example, a silicone adhesive such as silicone or modified silicone, thiochol, a solvent adhesive in which a resin is dissolved, or the like can be preferably used. The airtightness and the liquidtightness of the joint between the plate 4 and the plate P are reliably maintained.

The duct D in FIG. 2 is a duct having a rectangular cross section made by abutting four plate bodies P ... At 90 degrees, and four joiners A are connected to connect the four plate bodies P. It is used in the state that it is framed in a rectangular shape with continuous grooves 5. That is, each of the joiners A is cut off at an angle of 45 degrees as shown in FIG. 3, and at the corner portion of the duct D, the joiners A are connected to each other with the groove 5 being continuous. The connecting portions 1 and the supporting plate portions 2 are abutted with each other, and the abutting portions of the connecting portions 1 and the supporting plate portions 2 are air-tightly or liquid-tightly joined by welding or bonding with an adhesive. Similarly, the plate body P inserted into and bonded to the groove 5 of each joiner A is also cut at the end portion at 45 degrees, and at the corner portion of the duct D, the plate bodies P are arranged in the width direction. At 45 degrees.

Then, in the four framed joiners A ... By extending the connecting part 1 of one predetermined joiner A and contracting the connecting part 1 of the one joiner A located on the opposite side thereof. The bending angle θ is given to the duct D 1 at the position where the joiner A is interposed. In addition, in the duct D of FIG. 1, the flattening resistance of the duct D is improved by interposing a joiner A1 with a rib in the middle portion thereof. Also, by connecting a joiner A2 with a flange to the end of the duct D in the same figure, it is possible to make a flange connection to another duct not shown. In the joiner A1 with ribs, 21 is a support plate portion, 22 is a rib, 23 is a connecting piece, and 24 is a groove, and in the joiner with flange A2, 25 is a flange forming flange, and 26 is a flange forming flange. A support plate portion, 27 is a connecting piece, and 28 is a groove.

In the embodiments described above, the connecting portion 1 is formed in a bellows shape to give flexibility to the connecting portion 1, and the connecting portion 1 is formed in a bellows shape and the connecting portion 1 is made of a soft synthetic resin. The case where flexibility is given to the connecting portion 1 by molding has been described. However, the connecting portion 1 does not necessarily have to have a bellows shape, and the connecting portion 1 may be formed of a soft synthetic resin, or the connecting portion 1 may be thinned to provide flexibility. Examples of these are shown in FIGS. That is, in the joiner A of FIGS. 4 and 12, the connecting portion 1 has the same thickness as the connecting pieces 4 and 4, and the connecting portion 1 is formed of a soft synthetic resin and the connecting pieces 4 and 4 are formed of a hard synthetic resin. .. The joiner A shown in FIGS. 5 to 11 has flexibility by making the connecting portion 1 thin. 5 and FIG. 9 to FIG. 11 connect the connecting pieces 4 and 4 on one side with the connecting portion 1, and FIG. 6 connects the central portions of the connecting pieces 4 and 4 with the connecting portion 1. FIG. 7 shows the one side surface of the connecting portion 1 formed in a concave shape, and FIG. 8 shows the one side surface and the other surface side of the connecting portion 1 formed in a concave shape. In the joiner A shown in FIGS. 5 to 11, the connecting portion 1 may be formed of a soft synthetic resin.

In the joiner A of FIG. 9, a projecting piece 7 that is inwardly folded back and is inclined is formed on the support plate portion 2 on one side of the pair of support plate portions 2 and 2 forming the connection piece 4. There is. According to this, even when a plate body slightly thicker than the groove width of the groove 5 is inserted, the protruding piece 7 is deformed according to the thickness of the plate, so that the thickness of the plate and the groove width of the groove 5 are The dimensional inconsistency is absorbed and a proper fitting state is obtained. On the other hand, when the groove 5 and the groove 5'having a narrower width than that are formed by the pair of supporting plate portions 2 and 2 as in the joint A of FIG. 12, a thick plate P is formed. Since it is possible to insert the thin plate member P'into the narrow groove member 5'by inserting it into the wide groove member 5, it is possible to use the common joiner A for plate members having different wall thicknesses. Become.

In the joiner A of FIG. 10, a projecting piece 6 made of a soft synthetic resin is formed on the inner surface of one of the pair of support plate portions 2, 2 forming the connecting piece 4. With this arrangement, the projecting piece 6 is crushed when the plate body P is inserted, and the crushed projecting piece 6 functions as a retainer for the plate body P, and at the same time, a packing for preventing liquid leakage and the like. Play a role of. Needless to say, the protruding piece 6 may be formed on both of the pair of support plate portions 2 and 2. Like the joiner A in FIG. 11, even if the soft synthetic resin layers 6 ′ are formed on the inner surface of the support plate portion 2 in a planar state, the same effect is exhibited.

In the joiner A shown in FIGS. 4 to 12, the same or corresponding parts as those used in FIG. 1 are designated by the same reference numerals and detailed description thereof is omitted.

FIG. 13 shows a round duct D1 manufactured using the joiner A described in FIG. In the round duct D1, the plate bodies P connected by the joiner A have an arc shape.

By the way, if all of the joiner A, the plate P, etc. are continuously extruded from a synthetic resin such as polyvinyl chloride resin, they are cheaper than those made by injection molding. As the plate P, a plurality of calender sheets may be used by thermocompression bonding to have a predetermined thickness. The duct D, which is made of a resin with excellent chemical resistance such as polyvinyl chloride resin, is used as an exhaust gas duct for chemical plants and plating plants that handle corrosive gases such as hydrogen chloride, or as a ventilation duct for sewage treatment plants. It is preferably used for

[0021]

[Effect of the device]

 According to the present invention, it is possible to provide a duct joiner capable of coping with the difference in the bending angle of the intermediate portion in the axial direction of the duct and the curvature and bending angle in the circumferential direction of the duct with one type.

[Brief description of drawings]

FIG. 1 is a front view of a joiner according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of a curved duct manufactured using the joiner of FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG.

FIG. 4 is a front view of a joiner according to another embodiment.

FIG. 5 is a front view of a joiner according to another embodiment.

FIG. 6 is a front view of a joiner according to still another embodiment.

FIG. 7 is a front view of a joiner according to still another embodiment.

FIG. 8 is a front view of a joiner according to still another embodiment.

FIG. 9 is a front view of a joiner according to still another embodiment.

FIG. 10 is a front view of a joiner according to another embodiment.

FIG. 11 is a front view of a joiner according to still another embodiment.

FIG. 12 is a front view of a joiner according to still another embodiment.

13 is a side view of a round duct manufactured by using the joiner of FIG.

FIG. 14 is a sectional view of a conventional joiner.

[Explanation of symbols]

 A Joiner P Plate 1 Connection part 2 Support plate part 5 Groove

Claims (1)

[Scope of utility model registration request] 1. A groove in which a pair of support plate portions is projected on both sides of a flexible connecting portion, and an end portion of a plate body is inserted between the pair of support plate portions. A joiner for a duct, characterized in that a strip is formed, and the connecting portion and each of the supporting plate portions are integrally molded of synthetic resin.