JP2005233534A - Flexible joint member for duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible joint member for a duct capable of surely and firmly fixing mounting parts of a pair of flange members and strip-shaped canvases. <P>SOLUTION: This flexible joint member for the duct is composed of the pair of strip-shaped flange members 3 respectively having the U-shaped bent mounting parts on one end part, the strip-shaped canvases 4 composed of a sheet material and inserted into the mounting parts of the pair of flange members 3 at both side faces, a number of locking projection pieces 5 cut in such a state that tip end parts bite into the strip-shaped canvases 4 when the tensile force acts on the strip-shaped canvases 4 formed at specific intervals on the mounting parts of the pair of flange members 3 in which both side faces of the strip-shaped canvases 4 are inserted, and a perforated seam 6 formed by sewing a thread to the strip-shaped canvas 4 part on which the number of locking projection pieces 5 can be locked when the tensile force acts on the strip-shaped canvases 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to joint member deflection duct constituting a main portion of the joint bending duct.

  Fitting material deflection for the conventional duct and strip of the pair of galvanized sheet steel flange member having a mounting portion that is bent in a U-shape at one end, both sides are inserted into the mounting portion of the pair of flange members and canvas strip formed of sheet material, both sides of the canvas of the belt is inserted, and a dowel caulking formed at predetermined intervals in the attaching portion of the pair of flange members.

For this reason, when bending of the attachment part of a pair of flange members is sweet or a dowel for caulking is sweet, if force is added between a strip-shaped canvas and a pair of flange members, a canvas will come off from an attachment part. there has been a drawback.
The real No. 6-4534

  The present invention has been made in view of the conventional drawbacks described above, and its object is to provide a joint material deflection duct mounting of the mounting portion and the strip of canvas pair of flange members can be reliably and firmly carried out .

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

  To accomplish the above object, a sheet and a pair of flange members of the strip having a mounting portion that is bent in a U-shape at one end, is both side surfaces in the mounting portion of the pair of flange members are inserted strip and canvas formed of wood, the strip on both sides of the canvas are formed at predetermined intervals in the attaching portion of the pair of flange members which are inserted, canvas belt the tensile force acts on the canvas of the band-like to a plurality tip is cut so that the direction of biting pieces of the locking protrusion, the number the tensile force acts on the canvas of the belt-shaped pieces of belt-shaped canvas sites locking can protrusion and the locking constitute a joint material deflection duct between sewn perforated line seam yarn.

  As is clear from the above description, the present invention has the following effects.

(1) When a tensile force is applied to the belt-like canvas, a large number of locking protrusions cut so that the tip part bites into the belt-like canvas and a large number of engagements when a tensile force acts on the belt-like canvas. Since it is composed of perforated seams that are sewn to the belt-like canvas portion that can be locked to the stop projection piece, a tensile force is applied so that the belt-like canvas can be removed from the attachment portion of the pair of flange members. However, the leading ends of many locking protrusions bite into the belt-like canvas, and the perforated seams with thread sewn on the belt-like canvas part lock with the locking protrusions. It is possible to prevent the strip-like canvas from coming off.
Thus, compared to that relatively little force as in the case of only the conventional caulking dowel will be out omission to act, it is possible to produce a joint bending duct can be used safely.

(2) According to the above (1), the front ends of a large number of locking protrusions bite into the belt-like canvas, and the perforated seams formed by sewing threads on the belt-like canvas portions become protrusions to make a number of since stopping projecting tabs and the locking, even sweet bent mounting portion of the pair of flange members, also sweet the formation of a large number of locking protrusion, preventing escaped reliably the strip canvas omission can do.
Therefore, it is possible to produce such defective products does not occur, it is possible to reduce the cost.

(3) wherein the (1), since it is only necessary to set the position of the canvas perforated line seam position and strip-shaped tip of the plurality of the engaging protrusion it can be easily carried out.

(4) according to claim 2, the same effects as claim 3 is also the above (1) to (3) is obtained.

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

  In the best of the first mode for carrying out the present invention shown in FIGS. 1 to 13, 1 is a joint material deflection duct of the present invention, folded in a U-shape to the joint member 1 at one end deflection for the duct a pair of flange members 3 using Garubaryumu steel sheet having a bent mounting portion 2, 2, both sides are inserted into the mounting portions 2 of the pair of flange members 3, the pair of flange members 3,3 a strip of canvas 4 made of sheet material which comes into position close to not overlap the other end portion of the pair of flange members 3 with both side surfaces being inserted in the strip of canvas 4 formed at a predetermined interval in the mounting portion 2, 2, a number belt-shaped tension to the canvas 4 force is cut so that the tip end portion bites into the strip of canvas 4 to act pieces of the locking protrusion 5,5, to tensile force is applied to the canvas 4 of the strip Wherein the belt-shaped canvas 4 sites so that the plurality of engagement projecting pieces 5,5 and the engaging can projections and that, sewing machine sewn yarn as a plurality of yarns in the direction of the strip comes out It is composed of a eye-shaped seam 6.

  Canvas 4 of the strip, as shown in FIG. 4, that is sewn by superposing the single-sided aluminum foil glass cloth 7 and nylon tarpaulin 8 and, on one side of aluminum foil glass cloth 7,7 as shown in FIG. 5 superposed so as to face those sewn by is used.

  As shown in FIG. 6, the plurality of locking projections 5, 5 receive a triangular pyramid-shaped cut male mold 10 having one end portion formed on the vertical surface 9, and the cut male mold 10. using a female mold 13 having a receiving part 12 that forms a recess 11 on the bottom surface of the protrusion 5 portions, the cut end portion 5a of the retaining tongue pieces 5 are formed so as to bite into the belt-like canvas 4.

  The canvas 4 strip plurality multiple stitches 6 yarn perforations shaped sewn thread to exit this is the direction that has been cut so that the tip end portion bites into the canvas 4 of the strip of the retaining tongue pieces 5,5 disposed between, as shown in FIG. 7, while 3 per seam glance on the surface of-thread seams 6a canvas 4 sewing thread, the other surface seam 6b of the single-thread made as being formed by a double chain stitch 14 by double instead sewing machine.

  Perforated line of stitches sewn thread in double chain stitch 14 by sewing machine to a number which is formed so as to bite into the belt-shaped canvas 4 pieces of the strip of canvas 4 and the engaging projection pieces 5,5 double instead 3-thread seams 6a of 6, as shown in FIG. 8 such that the projections, each other engaged with each other when the pulling force acts on the canvas 4 of the strip, the strip from the mounting portion 2 of the flange member 3 to prevent the escape emerged of the canvas 4.

The duct flexible joint material 1 having the above-described configuration has a large number of locking projections 5 and 5 cut at the tip end portions of the belt-like canvas 4, and does not cause a problem of coming off even when a tensile force is applied. since, in the open state as shown in FIG. 9, the fold 15, 15 as shown in FIG. 10 to the pair of flange members 3, four cutting portions 16,16,16,16 of predetermined intervals willingly it can be formed on.
Thereafter, along with folding the square tube shape as shown in FIG. 11, bending substantially at a right angle the tip portion by a roll forming molding machine.
Next, the corner pieces 17, 17, 17, and 17 are positioned at the corner portion, and the tip portion is crimped and fixed as shown in FIG. 12, and the flange fixing bracket 18 is crimped and fixed to the flange portion of the connection portion.
After that, as shown in FIG. 13, the overlapping connection portion of the canvas 4 is closed with a staple needle or a caulking metal fitting at a predetermined interval, and the upper portion is fixed with an adhesive tape 19, whereby the duct flexible joint 20 is completed.
[Different forms for carrying out the invention]

  It will now be described different embodiments of the present invention shown in FIGS. 14 to 21. In the description of the different modes for carrying out the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and redundant description is omitted.

The second embodiment for carrying out the present invention shown in FIGS. 14 to 17 is mainly different from the best first embodiment for carrying out the present invention in that the multiple pieces of the belt-like canvas 4 are arranged. Threads are sewn on the belt-like canvas 4 that can be engaged with the plurality of locking protrusions closer to the side surface than the locking protrusions 5 and 5 so that a plurality of threads come out in the belt-like direction. Since the perforated seam 6 is formed by the attached double ring stitch 9, the duct flexible joint material 1A configured in this way is the best first embodiment for carrying out the present invention. same effect can be obtained.
In the embodiment of the present invention, double ring stitching is performed by sewing a plurality of threads so that a plurality of threads come out in the strip-shaped direction of the plurality of locking projections 5 and 5 and the strip-shaped canvas 4. The perforated seams 6 and 6 by 9 are in two rows, but the threads are sewn so that a plurality of threads come out in the belt-like direction of the numerous locking projections 5 and the canvas 4. Further, the perforated seams 6 formed by the double ring stitches 9 may be further provided in one row, respectively, at portions that can be locked to each other when a tensile force is applied to the belt-like canvas 4, and three rows may be provided.

The third embodiment for carrying out the present invention shown in FIGS. 18 to 21 is mainly different from the first embodiment of the present invention in that one end portions of the pair of flange-shaped flange members 3 and 3 described above. In each of the attachment parts 2 and 2 formed by being bent in a U shape,
In addition to biting into the belt-like canvas 4, the tip of the belt-like canvas 4 and the three thread seams 6 a of the perforated seams 6 by the double ring stitches 9 are further firmly locked. In order to carry out the present invention, the duct flexible joint material 1B configured in this way is formed in that a large number of locking projections 5A and 5A are formed so as to be thin and substantially triangular. The same effect as the first embodiment can be obtained.

Incidentally, in each embodiment of the present invention has been described one using a perforated line seam 6 by double chain stitch 9 sewn thread as a plurality of yarns exits in the direction of the band In the present invention, the method of sewing is not limited to this, and if the thread is thick and the perforated seam is fine and firm, the canvas 4 can be prevented from coming off from the flange member 3, so that it is rich in elasticity and durable. Single ring stitches, which are the ones, and decorative stitches may also be used.
Further, the although in the embodiments of the present invention has been described as using Garubaryumu steel a pair of flange members 3,3, the present invention is not limited thereto, metals such as galvanized sheet, which has been conventionally used in general it may be used as a plate.
Furthermore, the although in the embodiments of the present invention has been described as using a canvas 4 of the strip of dimensions that do not overlap the other end portion of the pair of flange members 3,3, the present invention is not limited to this, the pair canvas 4 of the strip of dimensions other end portion of the flange member 3, 3 overlap may be used.

The present invention is utilized in industrial installing industry, and this producing joint materials deflection duct.

Plan view of the best first mode for carrying out the present invention. Bottom view of the best first mode for carrying out the present invention. Side view of the best first mode for carrying out the present invention. Canvas illustration of the strip of the best first mode for carrying out the present invention. Different strip canvas illustration of the best first mode for carrying out the present invention. The expanded sectional view which follows the 6-6 line of FIG. Illustration of perforation-like seam by double chain stitch of the best first mode for carrying out the present invention. Illustration of the best condition strip tensile canvas force of the first embodiment is applied for carrying out the present invention. Illustration of an open state of the best first mode for carrying out the present invention. Illustration of forming the fold and cut portion to the pair of flange members of the best first mode for carrying out the present invention. Explanatory view showing a state in which a pair of flange members of the best first mode for carrying out the present invention is bent. Explanatory view showing a state of attaching the corner piece of the best first mode for carrying out the present invention. Illustration of a fixed state of the canvas of the connecting portion of the best first mode for carrying out the present invention. The top view of the 2nd form for carrying out the present invention. The side view of the 2nd form for carrying out the present invention. Explanatory view showing a state in which belt-shaped tension the canvas force of the second mode for carrying out the present invention is applied. Enlarged sectional view taken along line 14-14 of FIG. 12. The top view of the 3rd form for carrying out the present invention. The side view of the 3rd form for carrying out the present invention. The expanded sectional view which follows the 18-18 line of FIG. Explanatory view of a state where the third band of tension to the canvas force mode for carrying out the present invention is applied.

Explanation of symbols

1, 1A, 1B: flexible joint material for duct,
2: mounting portion, 3: flange member,
4: Belt-like canvas, 5, 5A: Locking protrusion,
6: perforated seam, 7: single-sided aluminum foil glass cloth,
8: Nylon tarpaulin, 9: Vertical surface,
10: cutting male, 11: recess,
12: receiving, 13: female,
14: double chain stitch, 15: fold,
16: cutting unit, 17: corner piece,
18: flange fixing bracket, 19: adhesive tape,
20: deflection fitting for duct.

Claims (3)

A pair of flange members of the strip having a mounting portion that is bent in a U-shape at one end, the strip of canvas that is formed in the sheet material both sides to the mounting portion of the pair of flange members are inserted, the strip on both sides of the canvas are formed at predetermined intervals in the attaching portion of the pair of flange members which are inserted, cut to tensile force canvas belt-like is to the direction in which the tip cuts into the strip of canvas action and plurality of locking protrusion that is, a canvas tension is perforated line of the sewn thread belt-shaped canvas site capable the plurality of engagement projecting pieces and engagement to act seam of said strip fitting member deflection duct, characterized in that it consists of. A pair of flange members of the strip having a mounting portion that is bent in a U-shape at one end, the strip of canvas that is formed in the sheet material both sides to the mounting portion of the pair of flange members are inserted, the strip on both sides of the canvas are formed at predetermined intervals in the attaching portion of the pair of flange members which are inserted, cut to tensile force canvas belt-like is to the direction in which the tip cuts into the strip of canvas action and plurality of locking protrusion that is, the belt-shaped canvas site such pulling force on the canvas of the belt is the plurality of the engaging protrusion and engaging it protrusions to act, the direction of the strip A flexible joint material for ducts comprising a perforated seam by double ring stitching in which threads are sewn so that a plurality of threads come out. A strip formed of a flange member using a pair of strip-shaped gallium steel plates having a mounting portion bent in a U-shape at one end, and a sheet material in which both side surfaces are inserted into the mounting portion of the pair of flange members And a pair of flange members in which both side surfaces of the belt-like canvas are inserted are formed in a plurality of rows at predetermined intervals, and when a tensile force acts on the belt-like canvas, the tip portion of the belt-like canvas and plurality of retaining tongue pieces that are cut such that the direction in which the bite is, the strip of canvas tension is to the plurality of the engaging protrusion and the locking can belt-shaped so that the projections act the canvas parts, joint material deflection duct, characterized in that it consists of a perforated line of stitches by a double chain stitch sewn thread as a plurality of yarns exits in the direction of the strip.

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