JP3233664U - Air conditioning path connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioning path connection structure for connecting two air-conditioning path members in an air-conditioning facility of a building, and to make the two air-conditioning path members detachable. SOLUTION: A first connecting pipe 10 is provided in a first air-conditioning passage member 3, a second connecting pipe 20 is provided in a second air-conditioning passage member 4, and a second connecting pipe 20 is fitted on the outer periphery of the first connecting pipe 10. A hole-shaped or recessed locked portion 11 is formed on the pipe wall of the first connecting pipe 10. The locked portion 11 has a locking edge 13 extending in the circumferential direction of the pipe and a pair of guide edges 12 and 14 extending in the axial direction of the pipe. The second connecting pipe 20 is provided with a leaf spring-shaped locking piece 30 that fits into the locked hole 11. The locking piece 30 is locked with the locking edge 13 to prevent the second connecting pipe 20 from being pulled out. Moreover, the locking piece 30 has a pair of locking projections 32 and 34 facing the pair of guide edges 12 and 14, respectively. When the second connecting pipe 20 is rotated, the locking projections 32 and 34 in the front in the rotation direction come into contact with the facing guide edges 12 and 14, and the locking piece 30 is displaced outward in the pipe radial direction, allowing pulling out. NS. [Selection diagram] Fig. 1

Description

The present invention relates to an air-conditioning path connection structure for connecting two air-conditioning path members in a building air-conditioning system, and particularly to an air-conditioning path connection structure in which two air-conditioning path members can be attached to and detached from each other.

In buildings such as office buildings, factories, and residences, air conditioners having branch chambers and a plurality of ducts are known. The air supply from the air conditioner branches into a plurality of ducts through a branch chamber and is blown out from a plurality of outlets. An air-conditioning path connection structure is provided at a connection portion between air-conditioning path members such as a duct and a branch chamber (see Patent Document 1 and the like).

For example, in the air-conditioning path connection structure disclosed in Patent Document 1, a metal second connecting pipe is provided at the tip of the flexible duct, and a leaf spring-shaped locking member is provided on the pipe wall of the second connecting pipe. It is provided. The locking member is a rectangular plate, and its end is bent diagonally to form a triangular claw-shaped locking projection protruding from the inner peripheral side of the second connecting pipe. A quadrangular locked hole is formed in the first connecting pipe protruding from the branch chamber. The second connecting pipe is fitted on the outer circumference of the first connecting pipe, and the locking projection is locked in the locked hole. As a result, the flexible duct is connected to the branch chamber and is prevented from coming off by the contact between the edge of 1 of the locked hole and the locking projection.

On the other hand, when the connected second connecting pipe is turned in a predetermined direction, the locking projection hits the edge of the locked hole orthogonal to the first edge and retracts, and the locked hole engages with the locking projection. Comes off. As a result, the second connecting pipe can be pulled out from the first connecting pipe.

Utility Model Registration No. 3226104

In Patent Document 1 described above, the direction of rotation of the second connecting pipe when separating the first and second connecting pipes is limited to either clockwise or counterclockwise. Even if it is turned to the opposite side, the engagement between the locking projection and the locked hole is not disengaged, and the second connecting pipe cannot be pulled out from the first connecting pipe.
The present invention has been made based on the above circumstances, and removes the limitation on the rotation direction of the second connecting pipe when separating the first and second connecting pipes in the air conditioning path connection structure, and performs the separation operation. The purpose is to increase the degree of freedom.

In order to solve the above-mentioned problems, the present invention is an air-conditioning path connection structure for connecting the first air-conditioning path member and the second air-conditioning path member.
The first connecting pipe provided in the first air conditioning path member and
A second connecting pipe provided on the second air-conditioning passage member and removably fitted on the outer periphery of the first connecting pipe is provided.
A hole-shaped or concave locked portion is formed on the tube wall of the first connecting pipe, and the locked portion extends in the circumferential direction of the pipe and both ends of the locking edge, respectively. It has a pair of guide edges that intersect and extend in the direction of the tube axis,
The second connecting pipe is provided with a leaf spring-shaped locking piece that fits into the locked portion and is locked to the locking edge to prevent the second connecting pipe from being pulled out.
The locking piece has a pair of locking projections that face each other of the pair of guide edges.
When the second connecting pipe is rotated in the circumferential direction with respect to the first connecting pipe, the locking projection in front of the rotating direction abuts on the opposite guide edge, and the locking piece allows the pulling out. It is characterized in that it is displaced outward in the radial direction of the pipe.
According to the air-conditioning path connection structure, no matter which side of the pipe circumferential direction the second connection pipe is turned with respect to the first connection pipe from the connected state, the locking projection in front of the rotation direction hits the opposite guide edge. Then, the locking piece is displaced outward in the pipe radial direction and comes out of the locked portion. This allows the second connecting pipe to be pulled out.

The locking piece has a cantilever leaf spring shape in which the end on the pull-out side is a free end, and the pair of locking protrusions are provided on both sides of the end on the pull-out side in the tube circumferential direction. Is preferable.

It is preferable that the pull-out side edge of each of the pair of locking protrusions is locked with the locking edge to prevent the pull-out. If an attempt is made to pull out the second connecting pipe straight along the pipe axis direction without turning the second connecting pipe, the locking piece abuts on the locking edge at at least two points, so that the pulling out can be reliably prevented.

It is preferable that the pair of locking projections have a symmetrical shape with respect to the center line of the locking piece along the tube axis direction. As a result, the required force for disengaging the locking piece from the locked portion and the required amount of rotation until disengagement are about the same regardless of which side the second connecting pipe is turned.

It is preferable that the pair of locking projections are brought closer to each other toward the inside in the pipe radial direction. As a result, regardless of which side the second connecting pipe is turned, the locking piece is reliably displaced outward in the pipe radial direction by the interaction between the locking protrusion in the front in the rotation direction and the guide edge facing the locking projection. NS.

It is preferable that the pair of locking projections move away from each other toward the insertion side in the tube axis direction. As a result, regardless of which side the second connecting pipe is turned, the locking piece is reliably displaced outward in the pipe radial direction by the interaction between the locking protrusion in the front in the rotation direction and the guide edge facing the locking projection. NS.

It is preferable that the end portion of the locking piece on the pull-out side has a trapezoidal shape narrowing toward the tip when viewed from the pipe radial direction. As a result, the pair of locking pieces are brought close to each other toward the pull-out side.

According to the present invention, when separating the first and second connecting pipes in the air conditioning path connection structure, the lock can be released by turning the second connecting pipe in either direction in the circumferential direction with respect to the first connecting pipe. , It is possible to increase the degree of freedom of the separation operation by eliminating the restriction on the rotation direction of the second connecting pipe.

FIG. 1 is a plan sectional view showing an air conditioning path connection structure according to an embodiment of the present invention in a connected state. FIG. 2 is a side sectional view of the air conditioning path connection structure along the line II-II of FIG. FIG. 3 is a perspective view of a part of the second connecting pipe of the air conditioning path connecting structure as viewed from the inner peripheral side. FIG. 4A is a front sectional view showing the air conditioning path connection structure in a state during connection. FIG. 4B is a front sectional view of the air conditioning path connection structure along the IVb-IVb line of FIG. FIG. 5A is a side sectional view showing one aspect of the separation operation of the air conditioning path connection structure. FIG. 5B is a side sectional view showing another aspect of the separation operation of the air conditioning path connection structure.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an air-conditioning path connection structure 1 composed of a branch chamber 3 (first air-conditioning path member) and a flexible duct 4 (second air-conditioning path member) in an air-conditioning facility provided in a building such as an office building, a factory, or a residence. Is shown. The peripheral wall of the branch chamber 3 is provided so that the first connecting pipe 10 projects. As shown in FIGS. 1 and 2, three (plurality) locked holes 11 (locked portions) are formed on the pipe wall of the first connecting pipe 10 at equal intervals in the pipe circumferential direction. .. As shown in FIG. 1, each locked hole 11 is a rectangular (quadrangular) through hole whose long side is directed in the circumferential direction (upper and lower in FIG. 1) in a plan view. The edge of the locked hole 11 on the tube tip side (right side in FIG. 1) constitutes a locking edge 13 extending in the tube circumferential direction (up and down in FIG. 1). The edges of both ends of the locked hole 11 in the tube circumferential direction form a pair of guide edges 12, 14. The guide edges 12 and 14 intersect with both ends of the locking edge 13 and extend in the pipe axis direction (left and right in FIG. 1).

As shown in FIG. 1, a second connecting pipe 20 is provided on the inner circumference of the end portion 4e of the flexible duct 4. The branch chamber 3 and the flexible duct 4 are separably connected by the second connecting pipe 20 being removably fitted on the outer periphery of the first connecting pipe 10. Airtight sealing materials 17 and heat insulating cover materials 18 and 28 for ensuring airtightness and heat insulating properties in the connected state are provided on the outer circumferences of the connecting pipes 10 and 20.

As shown in FIGS. 1 and 2, three (plurality) locking pieces 30 are formed in the second connecting pipe 20 at equal intervals in the pipe circumferential direction. As shown in FIG. 1, substantially "U" -shaped punched holes 22 are formed at three locations on the pipe wall 21 of the second connecting pipe 20. The inner portion of the punched hole 22 constitutes the locking piece 30. The end 31 on the insertion side (left side in FIG. 1) of the locking piece 30 is integrally connected to the pipe wall 21. The locking piece 30 has a cantilever leaf spring shape in which the end 33 on the pull-out side (right side in FIG. 1) is a free end.

As shown in FIGS. 2 and 3, each locking piece 30 has a pair of locking projections 32, 34. The locking projections 32 and 34 are provided on both sides of the end portion 33 on the pull-out side (upper side in FIG. 3) of the locking piece 30 in the tube circumferential direction, respectively. Specifically, the corners on both sides of the pull-out side end 33 are bent diagonally inward in the pipe radial direction (front side of the paper surface in FIG. 3) to form a pair of bent edges 33b and 33d. The bent edges 33b and 33d are close to each other toward the tip of the locking piece 30. The pull-out side end 33 of the locking piece 30 has a trapezoidal shape that narrows toward the tip when viewed from the pipe radial direction. The portions of the locking piece 30 on the corner side of the bent edges 33b and 33d are the locking projections 32 and 34.

As shown in FIGS. 2 and 3, each of the locking projections 32 and 34 is formed in a triangular shape and protrudes inward in the pipe radial direction from the inner peripheral surface of the second connecting pipe 20. Further, the pair of locking projections 32 and 34 have a _{symmetrical shape with respect to the center line L 30} of the locking piece 30 along the pipe axis direction, and are brought closer to each other toward the inside in the pipe radial direction to be inserted in the pipe axis direction. They move away from each other toward the side (lower side in FIG. 3).
The protruding ends (front edges of the paper surface in FIG. 3) of the tip edges 32e and 34e (edges on the pull-out side) of the locking projections 32 and 34 are slightly separated from each other, but may be attached to each other.

As shown in FIG. 4A, when the flexible duct 4 is connected to the branch chamber 3, the second connecting pipe 20 is arranged on the same axis as the first connecting pipe 10, and the circumference of the locking piece 30 is increased. By adjusting the position of the second connecting pipe 20 so that the position in the direction coincides with the locked hole 11, the second connecting pipe 20 is moved straight along the pipe axis toward the first connecting pipe 10. , Fit into the outer circumference of the first connecting pipe 10. During fitting, the locking projections 32 and 34 of the locking piece 30 hit the outer peripheral surface of the first connecting pipe 10, and the locking piece 30 is elastically deformed so as to warp toward the outer peripheral side. As shown in FIG. 4B, when the locking projections 32 and 34 coincide with the locked hole 11, the locking piece 30 is elastically restored.

As shown in FIG. 2, in the connected state between the connecting tubes 10 and 20, the locking projections 32 and 34 of the corresponding locking pieces 30 are fitted into each of the three (plural) locked holes 11. It has been stopped. As shown in FIG. 3, the outer surface 32a of the locking projection 32 is obliquely opposed to the guide edge 12. The outer surface 34a of the locking projection 34 is obliquely opposed to the guide edge 14. The tip edges 32e and 34e (edges on the pull-out side) of the locking projections 32 and 34 face the locking edge 13.

When the second connecting pipe 20 is pulled straight to the pulling side (upper side in FIG. 3) in the pipe axial direction without turning with respect to the first connecting pipe, the tip edges 32e and 34e of the locking projections 32 and 34 become locking edges. It hits 13 and is locked. This prevents the second connecting pipe 20 from being pulled out. In short, the tip edges 32e and 34e of the pair of locking projections 32 and 34 are locked with the locking edge 13 to prevent pulling out. Since the locking piece 30 abuts on the locking edge 13 at two points, pulling out can be reliably prevented.

As shown in FIG. 5, when the flexible duct 4 is separated from the branch chamber 3, the second connecting pipe 20 is rotated with respect to the first connecting pipe 10 in the circumferential direction. The second connecting pipe 20 may be rotated counterclockwise or clockwise in the insertion direction.
For example, as shown in FIG. 5A, when the second connecting pipe 20 is rotated counterclockwise, the side end edge 34f facing the inside of the pipe diameter of the locking projection 34 in the front in the rotation direction faces the guiding edge. By hitting and rubbing against 14, the locking projection 34 and thus the locking piece 30 are displaced outward in the pipe radial direction. As a result, the locking piece 30 escapes from the locked hole 11 and rides on the outer peripheral surface of the first connecting pipe 10, and the second connecting pipe 20 is allowed to be pulled out.

As shown in FIG. 5B, when the second connecting pipe 20 is rotated clockwise, the side end edge 32f facing the inside of the pipe diameter of the locking projection 32 in the front in the rotation direction is aligned with the facing guide edge 12. By hitting and rubbing, the locking projection 32 and thus the locking piece 30 are displaced outward in the pipe radial direction. As a result, the locking piece 30 escapes from the locked hole 11 and rides on the outer peripheral surface of the first connecting pipe 10, and the second connecting pipe 20 is allowed to be pulled out.

In this way, the engagement between the locking piece 30 and the locked hole 11 can be disengaged by turning the second connecting tube 20 to either side in the circumferential direction of the tube. Therefore, the degree of freedom of the separation operation can be increased. Since the locking projections 32 and 34 have a symmetrical shape, the required force for removing the locking piece 30 from the locked hole 11 and the required amount of rotation until the locking projections 30 are disengaged turn the second connecting pipe 20 to either side. But it can be about the same.
Subsequently, by moving the second connecting pipe 20 in the pulling direction, the second connecting pipe 20 can be pulled out from the first connecting pipe 10 and the flexible duct 4 can be separated from the branch chamber 3.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the locking piece 30 may be formed of a member separate from the second connecting pipe 20 and may be joined to the second connecting pipe 20 by welding or the like.
The pair of locking projections 32, 34 may have asymmetrical shapes.
The locked portion is not limited to the hole 11, and may be recessed when viewed from the outer peripheral side of the first connecting pipe 10.
The first air-conditioning path member is not limited to the branch chamber, but may be an air-conditioning main body, a duct different from the flexible duct 4, an outlet, or a ventilation louver.
The second air conditioning path member is not limited to the flexible duct 4, but may be a hard duct, a chamber, or the like.

The present invention can be applied to, for example, air conditioning equipment in office buildings.

1 Air conditioning path connection structure 3 Branch chamber (1st air conditioning path member)
4 Flexible duct (second air conditioning path member)
4e End 10 First connection tube 11 Locked hole (locked part)
12 Guide edge 13 Locking edge 14 Guide edge 17 Airtight sealing material 18 Insulation cover material 20 Second connection pipe 21 Tube wall 22 Punched hole 28 Insulation cover material 30 Locking piece 31 Insertion side end 32 engagement in the locking piece Stop protrusion 32a Outer surface 32e Tip edge 32f Side edge 33 Pull-out end 33b, 33d Bending edge 34 Locking protrusion 34a Outer surface 34e Tip edge 34f Side edge L ₃₀ center

Claims (7)

It is an air-conditioning path connection structure that connects the first air-conditioning path member and the second air-conditioning path member.
The first connecting pipe provided in the first air conditioning path member and
A second connecting pipe provided on the second air-conditioning passage member and removably fitted on the outer periphery of the first connecting pipe is provided.
A hole-shaped or concave locked portion is formed on the tube wall of the first connecting pipe, and the locked portion extends in the circumferential direction of the pipe and both ends of the locking edge, respectively. It has a pair of guide edges that intersect and extend in the direction of the tube axis,
The second connecting pipe is provided with a leaf spring-shaped locking piece that fits into the locked portion and is locked to the locking edge to prevent the second connecting pipe from being pulled out.
The locking piece has a pair of locking projections that face each other of the pair of guide edges.
When the second connecting pipe is rotated in the circumferential direction with respect to the first connecting pipe, the locking projection in front of the rotating direction abuts on the opposite guide edge, and the locking piece allows the pulling out. An air-conditioning path connection structure characterized in that it is displaced outward in the radial direction of the pipe. The locking piece has a cantilever leaf spring shape in which the end on the pull-out side is a free end, and the pair of locking protrusions are provided on both sides of the end on the pull-out side in the tube circumferential direction. The air conditioning path structure according to claim 1, wherein the air conditioning path structure is characterized by the above. The air-conditioning path structure according to claim 1 or 2, wherein the pull-out side edge of each of the pair of locking protrusions is locked with the locking edge to prevent the pull-out. The air conditioning path structure according to any one of claims 1 to 3, wherein the pair of locking projections have a symmetrical shape with respect to the center line of the locking piece along the pipe axis direction. The air-conditioning path structure according to any one of claims 1 to 4, wherein the pair of locking projections are brought closer to each other toward the inside in the pipe radial direction. The air-conditioning path structure according to any one of claims 1 to 5, wherein the pair of locking projections move away from each other toward the insertion side in the pipe axis direction. The air conditioning path according to any one of claims 1 to 6, wherein the end portion of the locking piece on the pull-out side has a trapezoidal shape narrowing toward the tip when viewed from the pipe radial direction. structure.

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