JP5827898B2 - Duct suspension structure - Google Patents

Description

  The present invention relates to a duct suspension structure that supports and suspends a duct for air conditioning or intake / exhaust in a suspended manner by using a pair of suspension bolts fixed to an upper structure such as a ceiling slab of a building and extending downward. About.

  Conventionally, in a duct suspension structure, the width and shape of a duct (a duct configured by four plates such as a steel plate) in a duct suspension work that is suspended from an upper structure such as a ceiling slab in a building Each time there was a change, it was necessary to prepare and prepare various types of suspension fittings. The conventional duct suspension structure includes, for example, a pair of suspension bolts that are fixed to an upper structure such as a ceiling slab of a building and extend downward, and the width of the pair of suspension bolts is adjusted to the width of the duct. A suspension type that is installed on both sides and supports the lower surface of the duct placed on the angle steel material by connecting the lower ends of a pair of suspension bolts with an angle steel material cut according to the width of the bottom surface of the duct. The duct suspension structure is well known (see, for example, Patent Document 1 or 2).

JP 2007-162910 A JP 2010-175137 A

  However, in the conventional duct suspension structure, the suspension bolt is not stable due to the structure in which the suspension bolt is extended from the upper structure such as the ceiling slab to the bottom surface of the lower duct, and the duct extends. Since there are a plurality of components arranged in the direction, there is a problem that the material cost and the part cost are high.

  Accordingly, an object of the present invention is to provide a duct suspension structure in which the suspension bolt can be set short and the duct can be stably suspended.

In order to solve the above problems, the invention of claim 1 is a duct suspension structure for suspending a duct by a suspension bolt fixed to an upper structure such as a ceiling slab of a building and extending downward, A hook body provided at the center of both outer side surfaces of the duct and extending in the axial direction of the duct, and a duct capable of engaging the hook body slidably in the longitudinal direction of the hook body and connecting the suspension bolt e Bei a holding member, wherein the hook body, the formed from the side of the duct to the L-shaped bent end portions extending outwardly vertically downward, said duct holding member, the surface on the outer surface of the duct The hook body is formed at a lower end of the outer peripheral rib of the box body, and is formed in a concave box body having one surface opened by a contact surface to be contacted and a rib extending from the outer periphery of the contact surface toward the outer side of the duct. Engaged with A J-shaped hook portion that includes an insertion portion for fixing by inserting the hanger bolts to the outer peripheral rib upper end, and wherein the.

  According to the present invention, the duct holding member is engaged and attached to the hook bodies on both side surfaces of the duct, and the duct holding member is connected to the hanging bolt, so that the duct is suspended by the hanging bolt and the suspended state. Thus, the duct holding member is slid along the hook body extending in the axial direction of the duct, and the position is adjusted and held at the optimum hanging position of the duct.

According to the present invention, the hook portion of the duct holding member is engaged with the hook body of the duct and attached, and the suspension bolt is inserted into the rib insertion portion of the duct holding member and fixed by fastening the nut. Thus, the duct is held by the suspension bolts and suspended, and in this suspended state, the contact surfaces of the duct holding member are brought into surface contact with both side surfaces of the duct, thereby being stably held.

The invention of claim 2 is the duct Suspended structure according to claim 1, wherein the insertion portion has a notch portion which is cut in a slit shape by a spring into the insertion opening of the hanging bolts are inserted A retractable protrusion is disposed in a protruding state, and a receding surface that contacts the protrusion when the suspension bolt is inserted and retreats by finger pressure, and a flat surface that contacts when the suspension bolt is discharged and prevents the suspension bolt from coming off. , Comprising an in / out member formed.

  According to this invention, the projecting member is installed in the notch portion of the duct holding member, and when the suspension bolt is inserted, it is brought into contact with the receding surface of the projection, the projection is retracted by finger pressure, and the suspension bolt is discharged. Occasionally, it comes into contact with the flat surface of the protrusion to prevent it from coming off, thereby preventing the suspension bolt from coming off from the notch of the duct holding member in the suspended state of the duct.

According to a third aspect of the present invention, in the duct suspension structure according to the first or second aspect, the hook body is integrally formed by bending a side plate of the duct. .

  According to the first aspect of the present invention, since the suspension bolt is attached at least above the center of the duct side surface by the duct holding member attached to the hook body of the duct, the length of the suspension bolt is shorter than that of the prior art. As a result, the duct can be stably held and suspended. In addition, the duct holding member connected to the suspension bolt is suspended by being engaged with the hook body of the duct, and the position can be adjusted by sliding the duct holding member on both sides of the duct in the longitudinal direction of the hook body. The duct can be held at an optimum hanging position to be hung on the hanging bolt. Further, since the hook body is formed to extend in the axial direction on both side surfaces of the duct, both side surfaces of the duct can be reinforced by the hook body, and the duct can be held more stably.

In addition, since both sides of the duct are held by the contact surface of the duct holding member, the duct can be more stably held and suspended. In addition, simply by engaging the hook portion of the duct holding member with the hook body of the duct, the duct holding member can be easily attached to the duct, and by simply inserting the suspension bolt into the insertion portion of this duct holding member and tightening the nut, Since the duct can be easily held by the suspension bolt and can be suspended, the workability is improved and the time for attaching the tact can be shortened. In addition, the duct can be stably and inexpensively suspended by a simple structure in which a rib is formed on the contact surface of the duct holding member and the insertion portion and the hook portion are provided.

According to the second aspect of the present invention, after the hanging bolt is brought into contact with the receding surface of the projecting portion and inserted into the notched portion by the projecting and retracting member installed in the notched portion of the duct holding member, this hanging bolt Since the contact with the flat surface of the protrusion is prevented during the discharge, the suspension bolt is reliably prevented from being detached from the notch of the duct holding member in the suspended state of the duct.

According to the invention described in claim 3 , since the hook body is integrally formed by bending the side plate of the duct, the strength and rigidity of the duct can be increased, and the number of parts and the part cost can be reduced. Can do.

It is an external appearance perspective view which shows the duct suspension structure which concerns on embodiment of this invention. It is sectional drawing which shows the XX sectional view of FIG. It is a perspective view which shows the structure of the side plate of FIG. It is a perspective view which shows the duct holding member of FIG. 1 in detail. It is operation | movement explanatory drawing which shows the operation | movement which inserts a suspending bolt in the intruding member of FIG. 4, (a) is the state before insertion, (b) is in the middle of insertion, (c) is the state after insertion, Each is shown. It is a figure which shows the operation | movement which hangs | hangs a duct with the duct suspension metal fitting of FIG. 1, (a) is the state which attaches a duct holding member to a duct, (b) is the state which fixes the duct holding member attached to the duct to a suspension bolt. Are shown respectively. It is an external appearance perspective view which shows the curved duct.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 1 is an external perspective view showing a duct suspension structure according to an embodiment of the present invention. 2 is a cross-sectional view showing a cross section taken along line XX of FIG. FIG. 3 is a perspective view showing the structure of the side plate 1B of FIG. 4 is a perspective view showing the duct holding member 13 of FIG. 1 in detail. As shown in FIG. 1, the duct suspension structure 10 is mainly composed of a suspension bolt 11, a hook body 12, and a duct holding member 13.

  The suspension bolts 11 are fixed to an upper structure such as a ceiling slab of the building (not shown) and extend downward to hold both sides of the duct 1 so as to be suspended. Are arranged in a pair. This suspension bolt 11 has a threaded portion 11a formed at the lower end extending downward from the ceiling, and has a structure that can be fixed to a duct holding member 13 to be subsequently operated by fastening a nut 14.

  The hook body 12 is formed of a metal material such as a steel plate forming the duct 1, and is formed integrally with the duct 1 by bending a side plate 1 </ b> B (see FIGS. 2 and 3) of the duct 1. Further, the hook bodies 12 are respectively provided at substantially the center of both outer side surfaces of the cylindrical duct 1 shown in FIG. 1, and are formed to extend in the axial direction of the duct 1 in order to hold the duct 1. Yes.

  Here, as shown in FIG. 2, the duct 1 is a rectangular duct in which plate materials such as steel plates are arranged in four directions, and is formed into a cylindrical shape by upper and lower horizontal plates 1A and left and right side plates 1B. The goby part 1a is arrange | positioned in the adjacent side edge part, and each side edge part is joined by this goze part 1a. In addition, the duct 1 is formed by bending the four sides (ends of the horizontal plate 1A and the side plate 1b) of the opening ends at both ends of the tube shown in FIG. Connecting flange portions 1b are formed on the four sides of the end portion. The duct 1 is fixed in a cylindrical shape by mounting L-shaped corner pieces 16 at the four corners of each flange portion 1b.

  And the hook body 12 mentioned above is integrally formed in the cylindrical both sides | surfaces of such a duct 1, ie, the side plate 1B. Specifically, as shown in FIG. 3, the side plate 1B is formed by bending a goby portion 1a at a side edge portion adjacent to the horizontal plate 1A, and both end portions orthogonal to the goze portion 1a are further bent to form a flange. Part 1b is formed. When the hook body 12 is formed, notches C are formed on both sides of the side plate 1B so as to bisect the center of the flange portion 1b at both ends of the side plate 1B, and the notches C on both sides of the side plate 1B are formed. The hook body 12 is formed by bending a part left in the middle between the two.

  At this time, the hook body 12 is formed to be L-shaped by extending horizontally from both side surfaces (side plate 1B) of the duct 1 and bending the end portion vertically downward. Further, after the hook body 12 is bent, the hook body 12 is formed on the side surface of the duct 1 shown in FIG.

  The length of the hook body 12 extending in the cylindrical axial direction on the side surface of the duct 1 is adjusted by the depth of the notch C cut out from both sides of the side plate 1B shown in FIG. That is, the hook body 12 reinforces both side surfaces (side plate 1B) of the duct 1 by adjusting the length extending in the cylindrical axial direction of the duct 1 shown in FIG. It is formed so that the position can be adjusted by sliding it even after engaging the duct holding member 13 to be operated later in the best hanging position.

  On the other hand, as shown in FIG. 4, the duct holding member 13 includes a contact surface 13 a that is in surface contact with both cylindrical side surfaces (side plate 1 </ b> B) of the duct 1, and an outer periphery of the contact surface 13 a in the outward direction of the duct 1. It is formed in the concave box body by which one surface was opened by the rib 13c extended. Also, the duct holding member 13 is fixed by inserting a J-shaped hook portion 13b to be engaged with the hook body 12 at the lower end of the outer peripheral rib 13c of the box, and inserting the suspension bolt 11 with the center notched at the upper end of the outer peripheral rib 13c. And a notch portion 13d to be provided.

  As shown in FIG. 1, the duct holding member 13 engages the hook portion 13 b slidably in the longitudinal direction of the hook body 12, inserts the suspension bolt 11 into the notch portion 13 d, and fastens the nut 14. By fixing (connecting), the suspension bolt 11 and the hook body 12 are connected to each other so as to hold the duct 1 in a suspended state. That is, the hook portion 13b side is fixed and the suspension structure is pulled toward the notch portion 13d side. In this suspended state, the contact surface 13a is inclined toward the side surface of the duct 1 with the hook portion 13b serving as a fulcrum to press the side surface. It comes in surface contact.

  Further, the contact surface 13a is provided with ribs 13c so as to surround the outer periphery shown in FIG. 3 so as to form a concave box. The rib 13c serves to reinforce so that the duct holding member 13 itself is deformed when the notched portion 13d side is pulled in the suspended state and the surface contact pressure of the suspended position and the contact surface 13a does not vary. I am doing. In other words, the rib 13c is reinforced so as to surround the outer periphery of the contact surface 13a, so that the notched portion 13d for fixing the suspension bolt 11 is not deformed (separated) by pulling in the suspended state. ing.

  Here, as shown in FIG. 5, in the notch portion 13d of the duct holding member 13, a protruding portion 15b that can be protruded and retracted by a spring is inserted into an insertion port into which the suspension bolt 11 (see FIG. 1) is inserted. A retractable member 15 (not shown in FIG. 1) is mounted. The retracting member 15 will be described in detail with reference to FIG. FIGS. 5A and 5B are operation explanatory views showing the operation of inserting the suspension bolt 11 into the retracting member 15 of FIG. 4. FIG. 5A shows a state before insertion, FIG. 5B shows a state during insertion, and FIG. Each state after insertion is shown. First, as shown in FIG. 5A, the projecting / retracting member 15 includes a spring 15c accommodated in the main body 15a, and a protrusion 15b partially protruding outside the main body 15a by the spring 15c. The projecting portion 15b is disposed in a state where the projecting portion 15b is projected from the notched portion 13d of the duct holding member 13.

  The protrusion 15b is formed with a receding surface A that abuts when the suspension bolt 11 is inserted and retreats by finger pressure, and a flat surface B that abuts when the suspension bolt 11 is discharged and prevents the suspension bolt 11 from being pulled out (see FIG. 3 (c)). The receding surface A is formed as an inclined surface or a semicircular arc curved surface (in FIG. 3, a semicircular arc curved surface) that narrows toward the tip of the protrusion 15b. Further, the flat surface B is disposed on the back surface on the back side with respect to the receding surface A, and is formed flat toward the tip of the protrusion 15b.

  In such a protrusion 15b, a receding surface A is arranged facing the notch 13d shown in FIG. 3A in the direction in which the suspension bolt 11 is inserted, and a flat surface B is arranged on the back surface thereof. . As shown in FIG. 3 (b), the protrusion 15b is inserted and brought into contact with the retreating surface A so that the retreating surface A is pressed by the suspension bolt 11 and biased by the spring 15c. However, it is retracted into the main body 15a. In this way, the suspension bolt 11 is inserted while being in contact with the protrusion 15b, and is inserted into the notch 13d while pressing and retracting the protrusion 15b protruding by the bias of the spring 15c.

  Then, as shown in FIG. 3 (c), when the suspension bolt 11 is inserted to the end of the notch 13d, the protrusion 15b is released from the pressure by the suspension bolt 11 and is urged by the spring 15c. It is returned to the state of protruding into the notch 13d. Thus, in the state where the protrusion 15b protrudes, even if the suspension bolt 11 inserted into the notch 13d is to be discharged from the notch 13d, the back surface A of the protrusion 15b is a flat surface B. Therefore, the suspension bolt 11 is prevented from being removed by stopping the discharge of the suspension bolt 11.

  In this manner, the projecting / retracting member 15 can easily insert the suspension bolt 11 into the notch 13d of the duct holding member 13 by the projecting / retracting operation of the protrusion 15b, and can be easily detached from the duct holding member 13 after the suspension bolt 11 is inserted. It is possible to prevent omissions.

  Next, the operation | movement which suspends the duct 1 by the duct suspension structure 10 of such a structure is demonstrated in detail with reference to FIG. 6A and 6B are diagrams illustrating an operation of suspending the duct 1 by the duct suspending structure 10 of FIG. 1, in which FIG. 6A illustrates a state in which the duct holding member 13 is mounted on the duct 1, and FIG. The state in which the holding member 13 is fixed to the suspension bolt 11 is shown. First, when the duct 1 is suspended by the suspension bolt 11, as shown in FIG. 6 (a), the hook portion 13b of the duct holding member 13 is inclined and pushed into the hook body 12 formed on both side surfaces of the duct 1. Then, it is attached so as not to be detached from the hook body 12.

  Thereafter, as shown in FIG. 6B, the duct 1 fitted with the duct holding member 13 is fixed to an upper structure (not shown) such as a ceiling slab of the building and a pair of suspension bolts 11 extending downward. By pushing up to the position, the end of the suspension bolt 11 is fixed to the duct holding member 13. At this time, when the duct 1 is pushed up to the position of the suspension bolt 11, the suspension bolt 11 is slightly inclined outward so that the duct holding member 13 attached to the duct 1 does not come into contact with the suspension bolt 11 and is removed. Push up. Further, the suspension bolt 11 pushes the duct 1 up to the suspension position, and then the protrusion 15b of the projecting member 13 shown in FIG. It is inserted while being brought into contact with the lens, and is mounted in a state in which it is prevented from coming out in the notch 13d.

  Finally, when the suspension bolt 11 is attached to the notch 13d of the duct holding member 13, as shown in FIG. 6B, the nut 14 is fastened to the screw portion 11a at the tip of the suspension bolt 11, The duct 1 is held in a state of being suspended from the suspension bolt 11, and all suspension operations are completed. At this time, the duct holding member 13 is slid and adjusted on both sides of the duct 1 along the longitudinal direction of the hook body 12 shown in FIG. Hold.

  As described above, according to this duct suspension structure 10, the suspension bolt 11 is attached above at least the center of the side surface of the duct 1 by the duct holding member 13 attached to the hook body 12 of the duct 1. In addition to the short suspension bolt 11, the both sides of the duct 1 are held by the contact surface 13 a of the duct holding member 13, thereby making contact with the short suspension bolt 11 in the suspended state of the duct 1. The surface 13a can be stably held and hung. Further, the duct holding member 13 connected to the suspension bolt 11 is suspended by being engaged with the hook body 12 of the duct 1, and the duct holding member 13 is disposed on both sides of the duct 1 in the longitudinal direction in which the hook body 12 extends. Since the position can be adjusted by sliding, the duct 1 can be held at the optimum hanging position to be hung on the hanging bolt 11. Further, since the hook body 13 is formed to extend in the axial direction on both side surfaces of the duct 1, both side surfaces of the duct 1 can be reinforced by the hook body 13 and the duct can be held more stably.

  Further, according to the duct suspension structure 10, the duct holding member 13 can be easily attached to the duct 1 simply by engaging the hook portion 13 b of the duct holding member 13 with the hook body 12 of the duct 1, and the duct holding member 13. By simply inserting the suspension bolt 11 into the notch 13d and tightening the nut 14, the duct 1 can be easily held and suspended by the suspension bolt 11, so that the workability is improved and the time for attaching the tact 1 is improved. Shortening becomes possible. Further, like the duct holding member 13, the duct 1 can be stably and inexpensively suspended by a simple structure in which the rib 13 c is formed on the contact surface 13 a and the notched portion 13 d and the hook portion 13 b are provided. Can do.

  Further, according to the duct hanging bracket 10, the hanging bolt 11 is brought into contact with the receding surface A of the projecting portion 15 b and inserted into the notched portion 13 d by the projecting member 15 installed in the notched portion 13 d of the duct holding member 13. Then, when the suspension bolt 11 is discharged, the suspension bolt 11 comes into contact with the flat surface B of the projection 15b to prevent the suspension bolt 11 from coming off, so that the suspension bolt 11 is detached from the notch 13d of the duct holding member 13 in the suspended state of the duct 1. Can be reliably prevented.

  Furthermore, according to the duct suspension structure 10, the hook body 12 is integrally formed by bending the side plate 1 </ b> B of the duct 1, so that the strength and rigidity of the duct 1 can be increased, and the number of parts and the part cost are increased. Can be reduced.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above embodiment, the side plate 1B is bent and the hook body 12 is integrally provided. However, an angle member having an L-shaped cross section is used as the hook body 12 and is joined to the side plate 1B. Also good. Thereby, for example, even in a curved duct structure, it is possible to suspend the corresponding duct structure.

  That is, FIG. 7 is an external perspective view showing the curved duct 2. As shown in FIG. 7, the curved duct 2 is divided (formed into three equal parts in FIG. 7) at a predetermined interval with respect to the axial direction extending in a curve. The duct holding member 13 is mounted by disposing separate hook bodies (not shown) at predetermined positions (dotted line positions shown in FIG. 7) on both side surfaces of the duct 2 thus divided. be able to. In the case of the duct 2 curved in this way, the hook body 12 shown in FIG. 1 is separated from the duct 2 so that the duct holding member 13 is attached and hung as in FIG. Is possible.

DESCRIPTION OF SYMBOLS 1, 2 Duct 1A Side plate 1B Horizontal plate 1a Haze part 1b Flange part 10 Duct hanging bracket 11 Hanging bolt 11a Screw part 12 Hook body 13 Duct holding member 13a Contact surface 13b Hook part 13c Rib 13d Notch part (insertion part)
14 Nut 15 Extruding member 15a Body 15b Protruding portion 15c Spring A Retreating surface B Flat surface C Notch

Claims (3)

A duct suspension structure for suspending a duct by a suspension bolt fixed to an upper structure such as a ceiling slab of a building and extending downward,
A hook body provided at the center of both outer side surfaces of the duct and extending in the axial direction of the duct;
E Bei and a duct holding member connectable longitudinally engages slidably said hook body, said hanger rod of the hook body,
The hook body is formed in an L shape that extends outward from a side surface of the duct and bends an end portion vertically downward;
The duct holding member is formed in a concave box having one surface opened by a contact surface that is in surface contact with the outer surface of the duct and a rib that extends from the outer periphery of the contact surface toward the outer side of the duct. And a J-shaped hook portion engaged with the hook body at the lower end of the outer peripheral rib of the box, and an insertion portion for inserting and fixing the suspension bolt at the upper end of the outer peripheral rib.
A duct suspension structure characterized by that. The insertion part is a notch part that is cut out in a slit shape, and a protrusion that can be protruded and retracted by a spring is arranged in a protruding state at an insertion port into which the suspension bolt is inserted. A retractable surface formed with a receding surface that contacts when the suspension bolt is inserted and retreats with finger pressure, and a flat surface that contacts when the suspension bolt is discharged to prevent it from coming off,
The duct suspension structure according to claim 1 . The hook body, the duct Suspended structure according to any one of claims 1 or 2, characterized in that, are integrally formed by bending a side plate of the duct.

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