JPH01307585A - Duct reinforcing construction - Google Patents

Abstract

PURPOSE:To prevent the internal or the external expansion of a duct due to adsorption and blow by providing female screw members on the inwall faces of the duct and a male screw member connecting the female screw members to each other, inserting a bolt from the outside of the wall part of the duct and screwing the bolt with the female screw members. CONSTITUTION:A square glass wool duct 11 is an example of a duct having a reinforced constitution body 12 and two female screw members 13 make contact with the internal faces of the upper wall 11a and the opposing bottom wall 11b of the duct 11 via the flange parts of the members 13. Both boss parts 13b are screwed up with a male screw member 14 to connect the female members 13 with each other. Furthermore, two bolts 16 are inserted through the upper wall 11a and the bottom wall 11b of the duct 11 from the outside thereof and screwed with the female members 13 via washers 15 until tightened. As a result, the duct may sufficiently bear intake air and blow air and be reduced in resistance against fluid flow inside the duct.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a reinforcing structure for a duct, such as a glass wool duct, and to a lightweight reinforcing structure that does not require stable construction at all times.

(Prior art) In recent years, glass wool ducts have been widely adopted because they are easier to construct and lighter than conventional iron plate ducts. The walls of glass wool ducts tend to bulge inward when air is taken in, and outward when air is blown out, so various duct reinforcement structures have been proposed to prevent these bulges. There is.

FIG. 4 is a diagram showing an example of this. Here, a support member 2 made of angle members joined into a rectangular shape and circumscribing the duct 1, which also has a rectangular outline, is attached to the ceiling by a hanging port 3. In the duct 1 to be installed, the wire 4 passed through each of the top wall 1a and the bottom wall 1b of the duct 1 is connected to each wall portion 1a of the duct 1.
, plates 5a, 5b in contact with the inner and outer surfaces of lb,
A duct reinforcing structure is constructed by attaching or fixing to each of 6a and 6b by caulking or other means, and in another example shown in FIG. , are brought into contact by their respective flanges 7a with the inner surfaces of the top wall 1a and the bottom wall 1b of the duct 1, respectively, and are penetrated into the top wall 1a and the bottom wall 1b from their outside through the washer 8. A duct reinforcing structure is constructed by screwing together the two screws 9 provided in the metal vibrator into two chrysanthemum nuts 1-10 disposed within the metal vibrator, in other words, female screw members having female screw portions formed in chrysanthemum washers. are doing.

(Problem to be Solved by the Invention) However, among these conventional techniques, in the former example using the wire 4, it is not possible to prevent the duct from expanding inward during intake, and the duct is always kept constant. In addition, in the latter example using the metal pipe 7, although the problems of the former example can be solved, there is a problem that the metal pipe 7 with a relatively large diameter cannot be used in the duct. Because of this arrangement, the flow resistance of the fluid in the duct becomes large, the weight becomes large, and furthermore, there are other problems in that the pulling strength of the chrysanthemum nut 10 is not stable.

The present invention provides a duct reinforcement structure that solves all of the problems of the prior art.

(Means for Solving the Problems) In the duct reinforcement structure of the present invention, two female threaded members are arranged in contact with opposing wall surfaces inside the duct, and these female threaded members are connected by one male threaded member. interconnected and further each of those internally threaded members;
Two bolts are inserted through the duct wall from the outside of the duct through washers and are screwed together.

(Function) With this duct reinforcement structure, the duct can be reinforced by threading and tightening the two male threaded members and two bolts into the female threaded member. In contrast, the bulge of the duct in the inward and outward directions is sufficiently prevented by the action of the male threaded member, and the duct is always attached to each part of the duct in the desired state.

Moreover, here, since one male threaded member and two female threaded members of relatively small diameter are arranged inside the duct,
Their impediment to the flow of fluid within the duct is significantly reduced, and the weight of the overall reinforcing structure can also be significantly reduced.

In addition, since each female threaded member here can be threadedly engaged with the male threaded member and the bolt over a sufficient length, accidental removal of the female threaded member from the female threaded member can almost certainly be prevented.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a cross-sectional perspective view showing an embodiment of the invention,
In the figure, 11 indicates a rectangular duct made of glass wool, and 12 indicates reinforcing structures attached to the rectangular duct 11 at predetermined intervals in the length direction thereof.

Here, this reinforcing structure 12 is inside the duct 11,
Two internally threaded members 13 are attached to each of the mutually opposing top wall 11a and bottom wall llb, respectively, and the respective flanges 1
A single male threaded member 14 made of metal or synthetic resin, preferably, is arranged in contact with each other by 3a, and both female threaded members 13 are screwed into the boss portion 13b of each female threaded member 13. At each end,
They are interconnected by male threaded members 14 having reverse threaded portions, and each of these female threaded members 13 is provided with a thread on the outside of the duct 11, and thus on the top wall 11a and the bottom wall 11.
It is constructed by screwing together two poles 1-16 which are penetrated from the outside of b through a washer 15.

Here, each internally threaded member 13, which can be made of a metal material, a synthetic resin material, etc., can have a circular flange 13a, for example, as shown in an enlarged view in FIG. The flange may have an appropriate profile and area as long as it does not interfere with other walls, other reinforcing structures 12, etc. In addition, in the female threaded member 13, especially the duct 1
Regarding those placed near the seam position of 1,
As shown in FIG. 3, it is preferable that the flange 13a extend long in the front-rear direction and come into contact with both the front and rear ducts 11.

Further, the boss portion 13b of each female threaded member 13 preferably has a bottom which allows the screwing amount of the male threaded member 14 and the bolt 16 to be specified in relation to the duct dimensions, the wall thickness thereof, etc. It has screw holes 13c and 13d, and according to this, when assembling the reinforcing structure 12,
The screwing amount of the male threaded member 14 and the bolt 16 into the boss portion 13b can be kept constant at all times, making it extremely easy to perform stable construction at each portion.

The washer 15 is also made of metal material, synthetic resin material, etc. and contacts the outer surface of the duct 11.
The shape and area of the flange 13a are the same as those of the flange 13a described above.
It can be made as appropriate depending on the requirements, and among others,
Regarding the one shear 15 disposed in the vicinity of the joint position of the duct 11, it is preferable that the one shear 15 extends long in the front-rear direction across the joint, similarly to the female screw member 13 shown in FIG. 3(b). According to the above, by assembling the reinforcing structure 12, the wall portion of the adjacent duct 11 can be sandwiched between the flange 13a and the washer 15.

Further, the washer 15 and the bolt 16 penetrating the duct wall can be made of metal, synthetic resin, or a composite thereof;
When the bolt is a flanged bolt like the illustrated example, the tightening force can be advantageously distributed over the washer.

According to the duct reinforcing structure as described above, the duct eye l can be reinforced by screwing - male threaded members 14 and two bolts 16 into the two female threaded members 13, respectively. , it is possible to sufficiently prevent the duct 11 from bulging in the outward and outward directions for both air intake and air blowing by the duct 11, and it is possible to always construct the reinforcing structure 12 as expected, as well as to ensure that the duct By making the internally threaded member 13 and male threaded member 14 sufficiently small in diameter, it is possible to significantly reduce the obstruction of fluid flow within the duct, and the weight of the reinforcing structure 12 can also be significantly reduced.

Moreover, since the male threaded member 14 and the bolt 16 are each screwed into the respective threaded holes 13c and 13d of the female threaded member 13 over a sufficient length, their accidental removal from the female threaded member 13 is prevented. It can be almost completely prevented.

Although not shown, the duct reinforcement structure of the present invention has the following features:
It can also be applied to opposite side walls of a duct, and can also be applied to a duct made of iron or wood.

(Effects of the Invention) Thus, according to the present invention, it is possible to sufficiently protect against both intake air and blowing air, and it is possible to always carry out construction as expected, as well as to prevent fluid flow within the duct. Both the resistance and the weight of the reinforcing structure can be significantly reduced, and furthermore, the accidental removal of the male threaded member and bolt can be almost completely prevented.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional perspective view showing an embodiment of the invention, and FIG.
3 is an enlarged view of the main part of FIG. 1, and FIG. 4.5 is a cross-sectional perspective view of a conventional example. 11...Duct lla...Top wall 11b
... Bottom wall 12 ... Reinforcement structure 13 ...
・Female thread member 13a...Flange 13b...
・Boss parts 13c, 13d...screw holes 14
...Male thread member 15...Washer 16.
...Port' patent applicant Bridgestone Corporation/f-1--Guft f3c-ri [hole f1
α---- term f3d・-neL7JLtlb
-----A BI/4-a BI" death 81/2---M
? Rape structure 15---Wah V ya f3---
-Rnc blind F material 16---Bolt f3a---
--7 runs) /3b-----Voice Sheet Figure 2 (a) rb> Procedural Amendment Book February 8, 1989 Director General of the Patent Office Yoshi 1) Moon Yi 1
, Indication of the case Patent Application No. 137488 of 1988 2 Name of the invention Duct reinforcement structure 3 Person making the amendment Relationship to the case Patent applicant (527) Brides Co., Ltd. Tongrasron Duct Co., Ltd. 4, Agent “Detailed description of the invention” “Brief description of drawings” in the specification
Column 1, add "(letter)" after "intake" on the first line of page 2 of the specification, add "(supply)" after "ventilation" on the second line of the same page, and add "(supply)" after "ventilation" on the second line of the same page. Correct the space between lines 5 to 9 as follows. [Conventionally, as shown in Fig. 4, a reinforcing member 2 made of grooved steel joined in a rectangular shape is provided on the inside for air intake and on the outside for air blowing, and a suspension support member 3 is placed at the bottom, and a suspension port is provided. 4
It is installed by attaching it to the ceiling. In addition, assuming that the reinforcing material 2 is not used, the top wall of the duct as shown in FIG. 3. The 6th line of page 3 is corrected as follows. "However, among these conventional techniques, the type that uses reinforcing material made by joining channel steel into a rectangular shape cannot be reinforced into a rectangular shape at branch points, etc., and must be reinforced as shown in Figure 7. It was heavy and had disadvantages such as being structurally flexible and difficult to return to its original shape, and was also difficult to construct.Furthermore, wire 4 was used for the rectangular type that did not use reinforcing material,'' 4, p. 9. "Figure 4.5" in line 18 is corrected to "Figures 4-7." 5. In the drawings, Figures 4 and 5 are corrected as shown in the attached sheet, and Figures 6 and 7 are supplemented as shown in the attached sheet. Figure 5 (correction 7゛,

Claims (1)

[Claims] 1. Two internally threaded members that contact opposing wall surfaces inside the duct, a male threaded member that interconnects these female threaded members, and a female thread that penetrates the duct wall from the outside via a washer. A duct reinforcement structure that includes two bolts that are screwed into a member.