JPH0812014B2 - duct - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air-conditioning or ventilation duct used in building equipment and the like.

[Conventional technology]

Conventionally, in order to form a duct, an iron plate is bent into a rectangular cross section, and a portion that becomes a goby is manually folded and bent, which requires a lot of work time and is troublesome.

Against such a thing, JP-A-58-6351, JP-B-52-50412, JP-B-50-17069, JP-B-48
In -17954, etc., an assembly-type duct is proposed, in which one end of adjacent face materials is inserted into a groove formed by bending the other face material end to assemble the whole into a tubular body. Has been done.

However, even in these assembly-type ducts, the flange portion at the end portion used as a connecting portion between the ducts is formed by riveting an L-shaped angle member and attaching it to the main body portion. The heavy use of rivets results in a great deal of labor for drilling and crimping operations.

On the other hand, a type in which the flange portion provided at the end of the duct is of a fitting type is found in Japanese Patent Laid-Open No. 52-72923. In this Japanese Laid-Open Patent Publication No. 52-72923, the duct is formed at the portion where two flanges are stacked. Since the end portions are only sandwiched, it cannot be said that the connection between them is sufficient, and there is a risk that they will fall out.

[Problems to be Solved by the Invention]

The object of the present invention is to eliminate the inconvenience of the conventional example, to reduce the number of manually bent portions, and to reduce the number of bolts and rivets as much as possible to reduce the number of assembly process steps and shorten the work time and save labor. And to provide a robust duct that is not easily disassembled after assembly.

[Means for solving the problem]

In order to achieve the above object, the present invention forms bulging projections at appropriate intervals on one end of adjacent face materials, bends the other face material end along the inside, and bends the tip. Start up,
Further, the tip is slightly folded inward to form a bag groove inside, and the tip is folded into the bag groove to form a locking piece for preventing slipping out. The entire end is assembled into a tubular body by inserting the end portion into the bag groove at the end of the other surface material, and bulging projections are formed at appropriate intervals in the circumferential direction on the left and right end portions of the tubular body, on the other hand, The flange member is composed of a corner metal member, which is an L-shaped plate body having bolt holes formed at its corners, and a linear channel member bent in a U-shape. Bend the tip in the opposite direction, slightly fold the tip inside to form a bag groove with a locking piece to prevent slipping out, stack the end of the corner metal piece on the end of the channel member, and fix it with rivets etc. Formed as a frame,
The flange member is attached to the duct end by inserting the end portion of the tubular body having the bulging projection into the bag groove of the channel member of the flange member, and the duct main bodies 1 with the flange member are abutted against each other in this way. Between the flange members to be joined together by the bolts, the corners are bolted through the bolt holes, and the flanges facing each other are bent from the outside at an intermediate position between the corners into a substantially inverted U shape. A flange insert is formed by projecting the back in only one side of the band, and a clip band with a groove in the width direction is bited inside the vicinity of the end on the other side, and a stopper is projected at one end in the gap. ,
The gist of the present invention is that the whole is tapered so as to gradually taper, and a wedge having a projection for preventing slipping out without a corner is inserted and fixed in the middle of the same side as the stopper.

[Action]

According to the present invention, the end portions of the adjacent face materials have bulging protrusions on one side, and the other bag groove has a locking piece for preventing slipping out. The protrusion is prevented from being caught by the locking piece and coming off.

In addition, since the flange member and the tubular body also have bulging projections on the tubular body side, and the bag groove of the flange member has a locking piece for preventing slipping out, the bulging projections are locked after they are once fitted. It prevents you from getting caught in and getting out.

Furthermore, when connecting the cylinders provided with the flange members, the corners between the flange members are bolted through the bolt holes, one of the flanges is inserted into the insertion part of the clip band, and the wedge is pushed using the groove as a guide. Then, if the clip band is fitted in the stopper and the claw, the wedge is interposed between the flange and the wedge, and the whole is firmly fixed.

Example of Invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external perspective view of the duct of the present invention, FIG. 2 is a plan view of the same as above, and FIG. 3 is a side view of the same.
Reference numeral 2 denotes a lightweight flange for joining, which is attached to the end of the main body 1.

First, the duct main body 1 will be described first. As shown in FIG. 4, the duct main body 1 is made of a metal tubular body having a rectangular cross section. However, the upper member 3, the lower member 4, the left and right standing members 5, 6 are It is composed of a combination of four plates.

The upper member 3 and the lower member 4 are bent at right and left end portions at right angles to form flanges 3a and 4a, and bulging projections (button punches) 7 are provided on the flanges 3a and 4a at appropriate intervals in the length direction. . As shown in FIG. 5a, the protrusion 7 is a rib-shaped extruded piece or
As shown in Fig. 5b, it may be formed by cutting and raising, but each is a protrusion that gradually increases in height so that it is easy to insert and difficult to pull out.

On the other hand, the left and right standing members 5 and 6 are bent at the upper and lower ends along the inner side as shown in FIG. 6, and the tips are further bent to stand up, and the tips are slightly folded inside to form a bag groove ( Pocket lock) 8 is formed inside.

In the figure, reference numeral 9 is a tip portion that is folded into the groove 8 and is a locking piece for preventing slipping out.

In this way, if the flange 3a is inserted into the bag groove 8 to join the face materials adjacent to each other, for example, the upper material 3 and the left standing material 5, the projection 7 that has entered therein will be locked by the locking piece 9. The upper end of the standing member 6 on the upper member 3 in the same way
Both ends of the lower member 4 are joined to the lower ends of the standing members 5 and 6, respectively, and assembled into a tubular body having a square cross section.

Next, the lightweight flange members 2 attached to the left and right ends of the duct body 1 to be assembled as described above will be described. As shown in the exploded front view of FIG. 7, the flange member 2 is a combination of the corner metal fitting 10 and the linear channel member 11. It is formed as a frame. Corner hardware as shown in FIGS. 8 and 9
Reference numeral 10 denotes an L-shaped plate body having bolt holes 10a formed at the corners thereof, and the channel member 11 has a horizontal flange 12 formed on the upper surface of the main portion bent in a U shape as shown in the side view of FIG. The tip of the lower flange 13 of this main part is folded back, the tip is further bent in the opposite direction, and the tip is slightly folded inside to form a bag groove (potato lock) 15 having a locking piece 14 for preventing slipping out. Formed. Then, the end of the corner metal fitting 10 is overlapped with the end of the channel member 11 and fixed with a rivet 21 or the like. By doing so, the flange can be assembled more easily than in the case where all the ends of the L-shaped channel member are conventionally welded.

On the other hand, as shown in FIG. 12, bulging protrusions (button punch) similar to the bulging protrusions 7 are formed on the left and right ends of the duct body 1.
16 are provided at appropriate intervals in the circumferential direction, and when this portion is inserted into the bag groove 15 of the flange 2, the projection 16 has the locking piece 14 in the groove 15.
Light weight flange member 2
Is attached to the end of the duct body 1.

In this way, the packing 17 is arranged between the flange members 2 and 2 which mutually abut and mutually join the duct main body 1 with the flange member 2, and the corners are fixed by the bolts 18 through the holes 10a. Further, the flanges 12, 12 facing each other outwardly have a clip band 19 from the outside at an intermediate position between the corners.
Bite, insert wedge 20 into the gap, and fix it (15th
(See Fig. 16). Figures 13a to 13e show clip bands.
The details of 19 are shown, and the flange insertion portion 19a is formed by projecting only one side at the back with a band bent in a substantially inverted U shape, and the groove 19b is provided in the width direction inside the vicinity of the end on the other side. There is.
In the figure, 19c indicates a reinforcing rib.

As shown in FIGS. 14a to 14c, the wedge 20 is provided with a stopper 20a at one end so as to form a tapered shape so that the whole is gradually tapered, and a corner is formed on the same side as the stopper 20a. There is no protruding claw 20b protruding.

Thus, as shown in Fig. 15, the clip band
One of the flanges 12 is inserted into the insertion portion 19a of 19 and the wedge 20 is pushed in using the groove 19b as a guide so that the clip band 19
As long as it fits in the stopper 20a and the claw 20b, the wedge 20 is interposed between the flange 2 and the wedge and the whole is firmly fixed.

〔The invention's effect〕

As described above, the duct of the present invention requires little welding or bolts and screws for assembling the duct body, attaching a lightweight flange to the duct body, and connecting the ducts via the flange. . Therefore, it is not necessary to open and crimp many holes for fasteners such as bolts, and since it can be done with one touch with fitting, the number of assembly steps and labor can be reduced, and work can be done quickly and easily. It is possible to save labor.

In addition, since all the assembled parts are designed to prevent falling out, the finished product is a robust one that is not easily disassembled.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of the duct of the present invention, FIG. 2 is a plan view of the same as above, FIG. 3 is a side view of the same as above, and FIG. 4 is an end view showing the assembled state of the duct body, and FIG. Is a cross-sectional view showing an example of a bulging protrusion, FIG. 5b is a cross-sectional view showing another example of a bulging protrusion, FIG. 6 is a vertical sectional side view of a bag groove portion, and FIG. 7 is an exploded front view of a lightweight flange. 8 is an enlarged front view of a corner portion of the lightweight flange, FIG. 9 is a side view of the same, FIG. 10 is a side view of a channel member constituting the lightweight flange, and FIG. 11 is a front view of the lightweight flange after assembly. Fig. 12 is a side view showing the attachment of the lightweight flange to the duct body, Fig. 13a is a front view of the clip band, Fig. 13b is the same left side view, Fig. 13c is the same right side view, and Fig. 13d is the same plan view. Fig. 13e is a bottom view of the same as above, Fig. 14a is a front view of a wedge, and Fig. 14b is a side view of the same.
FIG. 14c is a plan view of the same as above, FIG. 15 is a vertical sectional side view of a main part of the duct connecting portion, and FIG. 16 is a plan view of the same. 1 ... Duct body, 2 ... Light weight flange 3a, 4a ... Flange, 5, 6 ... Standing material 7 ... Bulging protrusion, 8 ... Bag groove 9 ... Locking piece, 10 ... Corner metal fitting 10a ... Bolt hole, 11 ... Channel member 12 ... Horizontal flange, 13 ... Lower flange 14 ... Locking piece, 15 ... Bag groove 16 ... Bulging protrusion, 17 ... Packing 18 ... Bolt, 19 ... Clip band 19a ... Flange insertion part, 19b ... Groove 19c ... Rib, 20 … Wedges 20a… Stoppers, 20b… Claws to prevent slipping out 21… Rivet

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location F16L 23/026 23/028 (72) Inventor Satoshi Hirata 4-51 Ota-cho, Naka-ku, Yokohama-shi, Kanagawa Address Kashima Construction Co., Ltd. Yokohama Branch (72) Inventor Teruo Hamada 4-51 Ota-cho, Naka-ku, Yokohama-shi, Kanagawa Kashima Construction Co., Ltd. Yokohama Branch (56) Reference JP-A-52-72923 (JP, A) Actual Development Sho 48-17954 (JP, U) Actual Public Sho 50-17096 (JP, Y2)

Claims (1)

[Claims] 1. A bulging projection is formed at an appropriate interval on one end of adjacent face materials, the other face material is bent along the inner side, and the tip is bent to stand up. Fold the tip slightly inward to form a bag groove inside, and fold the tip into this bag groove to form a locking piece for preventing slip-out. Part is inserted into the bag groove at the end of the other face material to assemble the whole into a tubular body, and bulging projections are formed at appropriate intervals in the circumferential direction at the left and right end portions of this tubular body. The member is composed of a corner metal member, which is an L-shaped plate body having bolt holes formed at its corners, and a linear channel member bent in a U-shape. Bend in the opposite direction and slightly fold the tip inside to have a locking piece to prevent it from coming out. Formed as a bag groove, the end of the corner metal fitting is overlapped with the end of the channel member, and fixed with rivets or the like to form a frame body, and the end portion of the tubular body having the bulging projection is a bag of the channel member of the flange member. The flange member is attached to the end portion of the duct by inserting it into the groove, and the corner portions between the flange members that are mutually abuttingly joined to each other in the duct body 1 with the flange member are bolted through the bolt holes. The flanges that face each other outwardly are formed with a flange insertion portion that protrudes from one side to the other side from the outside at the intermediate position between the corners and is bent in a substantially inverted U shape from the outside, and the other side. The clip band with a groove in the width direction is bited inside the vicinity of the end on the side, a stopper is protrudingly provided at one end in the gap, and the taper shape is formed so that the whole taper gradually. A duct characterized by inserting and fixing a wedge with a protruding protrusion that has no corners on the same side as the topper.