JP2018063104A - Air conditioning passage connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a connection operation between air-conditioning path members and stabilize a connection state. SOLUTION: A first connecting pipe 10 is provided in a first air conditioning path member 3. A leaf spring member 12 is provided on the pipe wall 11 of the first connecting pipe 10. The leaf spring member 12 projects outward in the radial direction of the first connecting pipe 10 toward the proximal end side of the first connecting pipe 10. The leaf spring member 12 is provided with the movable restricting portion 13. A fixing regulating portion 15 is provided on the first connecting pipe 10 on the base end side of the leaf spring member 12. A second connecting pipe 20 is provided in the second air conditioning path member 4, and the second connecting pipe 20 is fitted on the outer circumference of the first connecting pipe 10. The second connecting pipe 20 is restricted from moving to both sides in the axial direction by the regulating portions 13 and 15. [Selection diagram] Fig. 4

Description

  The present invention relates to an air conditioning path connection structure that connects two air conditioning path members in an air conditioning facility of a building, and more particularly, to an air conditioning path connection structure that allows two air conditioning path members to be connected with one touch.

  In a building such as an office building, air supply from an air conditioner branches into a plurality of ducts via a branch chamber or the like 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.

  Patent Document 1 discloses a connection structure between a duct and a duct connection port. An annular ring is provided on the inner periphery of the duct connection port. The annular ring is formed with a tapered portion whose diameter is reduced toward the side opposite to the duct side. On the other hand, a claw portion is obliquely cut and raised at the end of the duct. While the front-end | tip part of a duct is inserted in a duct connection port, the nail | claw part is hooked on the outer peripheral surface of the taper part.

Noto 3057474

In the connection structure of the above-mentioned patent document, it is necessary to insert the duct into the duct connection port until the entire claw portion exceeds the tip of the tapered portion. By doing so, the nail | claw part elastically returns to an oblique state. Then, the nail | claw part is hooked on the outer peripheral surface of a taper part by returning a duct a little in the extraction direction. In short, an extra operation of inserting the duct deeper than the final connection position and then returning it is necessary. Moreover, it is possible to insert the duct further deeply with the claw portion locked to the tapered portion, and the position of the duct is not stable.
In view of such circumstances, an object of the present invention is to provide an air conditioning path connection structure that can simplify the connection operation between air conditioning path members such as ducts and branch chambers and can stabilize the connection state.

In order to solve the above 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,
A first connecting pipe protruding in the axial direction from the first air conditioning path member;
A second connection pipe provided on the second air-conditioning path member and fitted on an outer periphery of the first connection pipe;
A leaf spring member that obliquely protrudes radially outward from the pipe wall of the first connection pipe toward the first air conditioning path member side, and is elastically deformable in the radial direction,
The leaf spring member is provided with a movable restricting portion, and the first connecting pipe or the first air-conditioning path member closer to the base end side than the leaf spring member is provided with a fixing restricting portion,
The second connecting pipe is restricted from moving to both sides in the axial direction by the movable restricting portion and the fixed restricting portion.

When the second connecting pipe is fitted on the outer periphery of the first connecting pipe, the leaf spring member is pushed by the second connecting pipe and elastically deformed radially inward of the first connecting pipe. When the second connecting pipe is positioned closer to the first air-conditioning path member than the leaf spring member, the leaf spring member is elastically restored, and the second connecting pipe is restricted by the movable restricting portion and the fixed restricting portion. Is done. Accordingly, the second connection pipe can be connected to the first connection pipe with a single touch, and as a result, the second air conditioning path member can be connected to the first air conditioning path member with a single touch. Therefore, even if the number of first and second air conditioning path members to be connected is large, the connection work can be efficiently performed in a short time.
Moreover, since the movement of the second connecting pipe can be restricted in the pulling direction by the movable restricting portion and the movement can be restricted in the inserting direction by the fixed restricting portion, the connection state can be stabilized.

It is preferable that the second connection pipe has an annular locking portion that is locked with the movable restriction portion.
Thereby, during the connection operation, the angle alignment in the circumferential direction between the first and second connection pipes can be facilitated, or the angle alignment can be made unnecessary.

  The second connecting pipe has a locking portion that is locked to the movable restricting portion, and the locking portion is opposite to the first air-conditioning path member from the inner peripheral surface of the second connecting pipe; It is preferable that the second connecting pipe protrudes obliquely inside. Accordingly, when the second connecting pipe is fitted into the first connecting pipe, the locking portion can easily get over the movable restricting portion. After the fitting, the movement of the second connecting pipe can be reliably controlled by locking the locking portion to the movable restricting portion.

A hole is formed in the tube wall of the first connection tube,
It is preferable that the leaf spring member is fixed to the inner peripheral surface of the first connection pipe and protrudes to the outside of the first connection pipe through the hole.
Accordingly, when the second connection pipe is fitted to the outer periphery of the first connection pipe, the second connection pipe is not caught by the fixed portion of the leaf spring member, and the connection operation can be performed smoothly.

A hole is formed in the tube wall of the first connection tube,
The movable restricting portion is inserted into the first connecting pipe through the hole from the outside of the first connecting pipe;
It is preferable that a hooking portion facing the inner peripheral surface of the first connecting pipe is provided at an end of the movable restricting portion on the insertion side.
As a result, when the leaf spring member attempts to deform in a steeply inclined direction (a side where the inclination with respect to the axis of the first connecting pipe increases), the hooking portion is caught on the inner peripheral surface of the first connecting pipe. As a result, it is possible to prevent the entire movable restricting portion from coming out of the hole. Therefore, the movement of the second connecting pipe in the pulling direction can be reliably restricted by the movable restricting portion.
The hole through which the movable restrictor is passed may be the same hole as the hole through which the leaf spring is passed or may be a different hole.

A hole is formed in the tube wall of the first connection tube,
The movable restricting portion is inserted into the first connecting pipe through the hole from the outside of the first connecting pipe;
It is preferable that a hooked portion that can be hooked on the hooking means is provided at an end of the movable restricting portion on the insertion side.
By doing so, for example, the hooking means such as hooks, straps, and fingers are hooked on the hooked portion from the inside of the first air-conditioning path member, and the leaf spring member is pulled into the first connecting pipe. Can do. Thereby, the movement restriction | limiting in the extraction direction of a 2nd connecting pipe can be cancelled | released, and a 2nd connecting pipe can be pulled out from a 1st connecting pipe, and can be isolate | separated. Therefore, it is possible to easily perform the connection operation again, the disassembly and removal work, and the like.
Furthermore, when the second connection pipe is provided with an operation locking portion and the second connection pipe is rotated relative to the first connection pipe, the movable restricting portion is displaced inward in the radial direction by the operation locking portion. Thus, the restriction in the pulling direction may be released.

  According to the present invention, the air-conditioning path members can be easily connected with one touch, and the connection state can be stabilized.

FIG. 1 shows a first embodiment of the present invention and is a plan view of a duct branch portion of an air conditioning equipment. FIG. 2 is an exploded perspective view of the branch chamber with the first connection pipe and one second connection pipe of the duct branch portion. FIG. 3 is a front cross-sectional view of the duct branching portion air-conditioning path connection structure taken along line III-III in FIG. 1. FIG. 4 is a plan cross-sectional view of the air conditioning path connecting structure taken along line IV-IV in FIG. 3. FIG. 5 is a plan sectional view showing a state before the first and second connection pipes are connected in the air conditioning path connection structure. FIG. 6 is a plan sectional view showing a state in the middle of connecting the first and second connection pipes in the air conditioning path connection structure. Fig.7 (a) is sectional drawing which shows an example in the state which the leaf | plate spring member of the said 1st connection pipe deform | transformed. FIG.7 (b) is sectional drawing of the state which connected the 1st, 2nd connecting pipe in the figure (a). FIG. 8 shows a second embodiment of the present invention and is a plan view of a duct branch portion of the air conditioning equipment. FIG. 9 shows a third embodiment of the present invention and is a side view of a duct branch portion of an air conditioning equipment. FIG. 10 shows a fourth embodiment of the present invention and is a cross-sectional plan view of a duct branch portion of an air conditioning equipment. FIG. 11 shows a fifth embodiment of the present invention and is a cross-sectional plan view of a duct branch portion of an air conditioning equipment. FIG. 12 shows a sixth embodiment of the present invention and is a cross-sectional plan view of a duct branch portion of an air conditioning equipment. FIG. 13 is a perspective view of the locking cylinder member of the sixth embodiment. FIG. 14 shows a seventh embodiment of the present invention and is a plan sectional view of a duct branch portion of an air conditioning equipment. FIG. 15 shows an eighth embodiment of the present invention and is a cross-sectional plan view of a duct branch portion of an air conditioning equipment. FIG. 16: is side surface sectional drawing which shows 9th Embodiment of this invention and shows a part of air-conditioning path connection structure of a duct branch part. FIG. 17 is a cross-sectional view of the air-conditioning path connection structure of the duct branch portion according to the ninth embodiment, taken along line XVII-XVII in FIG. 18A to 18C are side cross-sectional views sequentially showing how the second connection pipe is fitted into the branch duct of the ninth embodiment. FIG. 19A is a perspective view of the leaf spring member of the ninth embodiment. FIG. 19B is a side view of the leaf spring member of the ninth embodiment. Fig.20 (a) is a top view of the leaf | plate spring member based on 10th Embodiment of this invention, and shows a 1st connecting pipe with a dashed-two dotted line. FIG. 20B is a cross-sectional view taken along line XXb-XXb of the leaf spring member of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1 to 6 show a first embodiment of the present invention. An air conditioning facility 1 is provided in a building such as an office building. As shown in FIG. 1, the air conditioning equipment 1 includes a trunk duct 2, a branch chamber 3, and a plurality of branch ducts 4, 4. The trunk duct 2 extends directly from the air conditioner (not shown) or via another duct (not shown). A plurality of branch ducts 4, 4... Are branched from the trunk duct 2 through the branch chamber 3. Each branch duct 4 extends to an outlet (not shown) of each room of the building.

  The trunk duct 2 and the branch duct 4 are composed of flexible ducts whose main components are soft heat insulating materials such as foamed resin. The trunk duct 2 has a relatively large diameter, and the branch duct 4 has a relatively small diameter. The number of branch ducts 4 is four in FIG. 1, but is not limited to this, and may be three or less, or five or more.

  As shown in FIGS. 1 and 2, the branch chamber 3 has a cylindrical shape in which the upper and lower surfaces (the front surface and the back surface in FIG. 1) are closed. The cylindrical peripheral wall 3d, the upper plate 3e, and the bottom plate 3f of the branch chamber 3 are mainly composed of a heat insulating material such as glass wool. As shown in FIG. 1, the branch chamber 3 is formed with one upstream connection port 3a and a plurality (four in FIG. 1) of downstream connection ports 3b, 3b. The upstream side connection port 3a is disposed on one side (upper side in FIG. 1) of the cylindrical peripheral wall 3d. The plurality of downstream side connection ports 3b, 3b,... Are arranged in a distributed manner in about a half-circumferential portion of the cylindrical peripheral wall 3d opposite to the upstream side connection port 3a.

As shown in FIG. 1, a branch chamber 3 (first air conditioning path member) and a trunk duct 2 (second air conditioning path member) are connected by an upstream air conditioning path connection structure 1a. The branch chamber 3 (first air conditioning path member) and each branch duct 4 (second air conditioning path member) are connected by the downstream air conditioning path connection structure 1b. The air conditioning path connection structures 1a and 1b have substantially the same structure.
Hereinafter, the downstream side air conditioning path connection structure 1b will be described in detail. The upstream side air conditioning path connection structure 1a is denoted by the same reference numerals in the drawings with respect to substantially the same components as the air conditioning path connection structure 1b, and description thereof is omitted.

  As shown in FIGS. 1 and 2, the air conditioning path connection structure 1 b includes a first connection pipe 10 and a second connection pipe 20. The first connecting pipe 10 is provided in the branch chamber 3, and the second connecting pipe 20 is provided in the branch duct 4.

  As shown in FIG. 2, the first connection pipe 10 is configured by a cylindrical metal pipe. As shown in FIGS. 3 and 4, the axis L of the first connecting pipe 10 is directed in the radial direction of the branch chamber 3. The distal end side (right side in FIGS. 3 and 4) in the direction (axial direction) along the axis L of the first connecting pipe 10 is directed to the branch duct 4, and the proximal end side (left side in FIGS. 3 and 4) is It is directed to the inside of the branch chamber 3. The base end portion of the first connection pipe 10 is accommodated in the connection port 3b. A flange 16 is formed at the proximal end portion of the first connection pipe 10. The flange 16 has an annular shape curved so as to follow the peripheral edge of the connection port 3b. The flange 16 is hooked on the inner peripheral surface of the branch chamber 3.

  As shown in FIGS. 3 and 4, the portion of the first connecting pipe 10 on the distal end side with respect to the proximal end portion protrudes outward from the branch chamber 3. A plurality of holes 11 a are formed in the distal end portion of the tube wall 11 of the first connection tube 10. Each hole 11a has a rectangular shape that penetrates the tube wall 11 and extends parallel to the axis L. In the figure, two holes 11 a are arranged 180 ° apart in the circumferential direction of the first connecting pipe 10, but a plurality (preferably three or more) of holes 11 a are arranged around the first connecting pipe 10. They may be arranged at intervals in the direction (extending or arranging in an annular shape along the circumferential direction).

  As shown in FIGS. 3 and 4, the first connecting pipe 10 is provided with a plurality of leaf spring members 12. In the figure, two leaf spring members 12 are arranged 180 degrees apart in the circumferential direction of the first connecting pipe 10, but a plurality (preferably three or more) of the leaf spring members 12 are arranged in the first connecting pipe 10. 10 may be arranged at intervals in the circumferential direction (circularly extending or arranged along the circumferential direction). The leaf spring member 12 is disposed so as to correspond to the hole 11a on a one-to-one basis.

  As shown in FIG. 5, each leaf spring member 12 integrally includes a leaf spring portion 12 a, a fixed portion 12 b, a movable restriction portion 13, and a hook portion 14. The fixed portion 12b (fixed end portion) is disposed on the tip side (right side in FIG. 5) of the first connecting pipe 10 and in the vicinity of the hole portion 11a with respect to the hole portion 11a on the inner peripheral surface of the tube wall 11. Yes. The fixed portion 12b is fixed to the tube wall 11 by fixing means such as welding or screwing.

The leaf spring portion 12a extends obliquely from the fixed portion 12b to the proximal end side of the first connecting pipe 10 (on the first air-conditioning path member 3 side, the left side in FIG. 4) and radially outward of the first connecting pipe 10. Yes. The leaf spring portion 12a protrudes outside the first connecting pipe 10 through the hole portion 11a. An end portion of the leaf spring portion 12a opposite to the fixed portion 12b is a free end portion 12e.
The leaf spring portion 12a can be elastically deformed so that the inclination angle is increased or decreased by the force along the radial direction of the first connecting pipe 10. When the force is released, the leaf spring portion 12a elastically returns to the original inclination angle.

  As shown in FIG. 5, the movable restricting portion 13 is connected to the free end portion 12e of the leaf spring portion 12a. The movable restricting portion 13 is bent at an acute angle from the leaf spring portion 12 a and extends inward in the radial direction of the first connecting pipe 10. The movable restricting portion 13 is inserted into the first connecting pipe 10 through the hole 11a. The movable restricting portion 13 is displaced in the radial direction of the first connecting pipe 10 along with the elastic deformation of the leaf spring portion 12a.

  As shown in FIG. 5, a hooking portion 14 is provided at the end portion 13 e on the insertion side of the movable restricting portion 13 into the first connecting pipe 10. The hook portion 14 is bent at a right angle from the movable restricting portion 13 and faces the inner peripheral surface of the first connecting pipe 10.

As shown in FIG. 2, a fixing restricting portion 15 is provided on the branch chamber 3 side (base end side) of the first connecting pipe 10 with respect to the leaf spring member 12. The fixing restricting portion 15 has a flange shape that protrudes radially outward from the outer peripheral surface of the tube wall 11.
Note that the fixing restricting portion 15 may be retrofitted to the first connecting pipe 10. That is, after inserting the 1st connection pipe 10 into the connection port 3b from the inside of the branch chamber 3, and making it protrude the outer side of the surrounding wall 3d, you may decide to attach the fixed control part 15 to this protrusion part.

  As shown in FIG. 5, the surface facing the second connecting pipe 20 side (the right side in FIG. 5) in the fixing restricting portion 15 is covered with a heat insulating packing 17. The heat insulating packing 17 is made of a soft heat insulating material made of foamed resin or the like, and has an annular shape over the entire circumference of the fixing restricting portion 15.

As shown in FIG. 5, the outer peripheral surface between the branch chamber 3 and the fixing restricting portion 15 in the tube wall 11 of the first connecting tube 10 is covered with a heat insulating sheet 18. The heat insulating sheet 18 is composed of an adhesive sheet made of a soft heat insulating material such as foamed resin.
3 to 5, the heat insulating sheet 18 may also cover the surface facing the branch chamber 3 side (the left side in FIG. 5) in the fixing restricting portion 15 and the outer peripheral end face of the fixing restricting portion 15. .

  As shown in FIGS. 3 and 4, the second connecting pipe 20 is attached to the end of the branch duct 4. The second connection pipe 20 is configured by a cylindrical metal pipe. The inner diameter of the second connection pipe 20 is larger than the outer diameter of the first connection pipe 10. The second connection pipe 20 is disposed on the same axis L as the first connection pipe 10. The first end 23 of the second connecting pipe 20 is directed to the branch chamber 3 side (left side in FIGS. 3 and 4), and the second end 24 of the second connecting pipe 20 is opposite to the branch chamber 3 (see FIG. 3 and the right side in FIG.

As shown in FIG. 4, the second connecting pipe 20 is provided with a locking portion 21. The locking part 21 is formed by cutting and raising a part of the second connecting pipe 20 inward, and from the inner peripheral surface of the second connecting pipe 20 to the second end 24 side (right side in FIG. 4) and the second 2 It protrudes diagonally to the inside of the connecting pipe 20. The locking portion 21 is disposed so as to correspond to the leaf spring member 12 on a one-on-one basis. In the figure, two locking portions 21 are arranged 180 degrees apart in the circumferential direction of the second connecting pipe 20, but a plurality (preferably three or more) locking portions 21 are provided in the second connecting pipe 20. May be arranged at intervals in the circumferential direction (extending or arranging in an annular shape along the circumferential direction). The latching | locking part 21 may be cyclically extended over the perimeter of the circumferential direction of the 2nd connection pipe 20 (refer FIG. 12). As shown in FIG. 5, the distance L ₃ from the first end 23 of the second connection tube 20 to the tip of the locking portion 21 is the distance between the movable restricting portion 13 and the fixed restricting portion 15 of the first connecting tube 10. during and at a distance _{L 1} below, and larger than the distance _{L 2} between the movable restricting portion 13 and the heat insulating packing _{17 (L 2 <L 3 ≦} L 1).

  A heat insulating sheet 28 is provided on the outer peripheral surface of the second connecting pipe 20. The heat insulating sheet 28 is made of an adhesive sheet made of a soft heat insulating material such as foamed resin, and covers the entire outer peripheral surface of the second connecting pipe 20.

  As shown in FIGS. 3 and 4, the second connection pipe 20 is fitted on the outer periphery of the first connection pipe 10. As shown in FIG. 4, the second connecting pipe 20 covers the hole 11 a and the leaf spring member 12. An annular gap 20 e is formed between the inner peripheral surface of the second connection pipe 20 and the outer peripheral surface of the first connection pipe 10. The thickness of the gap 20e (the difference between the inner radius of the second connecting pipe 20 and the outer radius of the first connecting pipe 10) is about several mm (for example, 3 mm). The first end portion 23 of the second connection pipe 20 bites into the heat insulating packing 17, and the heat insulating packing 17 is compressed and deformed. When the first end portion 23 is engaged with the fixing restricting portion 15 via the heat insulating packing 17, the second connecting pipe 20 is inserted in the insertion direction (the base end side of the first connecting pipe 10, left side in FIG. 4). Is restricted from moving to. Furthermore, as shown in FIG. 4, the distal end portion of the locking portion 21 abuts against the movable restricting portion 13 and is locked. The second connecting pipe 20 is restricted from moving in the drawing direction (the tip side of the first connecting pipe 10, the right side in FIG. 4) by the locking of the movable restricting portion 13 and the locking portion 21.

<Duct connection method>
As shown in FIG. 5, when connecting the branch duct 4 to the branch chamber 3, the branch duct 4 is directed toward the branch chamber 3 with the axis of the branch duct 4 aligned with the axis L of the first connection pipe 10. The second connecting pipe 20 is fitted on the outer periphery of the first connecting pipe 10.
As shown in FIG. 6, when the branch duct 4 is further moved toward the branch chamber 3, the locking portion 21 of the second connection pipe 20 eventually hits the leaf spring member 12. Then, the leaf spring member 12 is pushed into the hole 11a by the locking portion 21, and is elastically deformed in a direction in which the inclination becomes gentle. In addition, the latching | locking part 21 may also be elastically deformed. Since both the leaf spring portion 12a and the locking portion 21 are inclined, the locking portion 21 can easily get over the leaf spring portion 12a.

  As shown in FIG. 4, when the front end of the locking portion 21 is positioned closer to the branch chamber 3 than the leaf spring portion 12a, the leaf spring member 12 is elastically restored. At this time, the first end portion 23 of the second connection pipe 20 bites into the heat insulating packing 17 and comes close to or comes into contact with the fixing restriction portion 15. And the front-end | tip part of the latching | locking part 21 hits the movable control part 13. FIG. As a result, the second connecting pipe 20 is coupled to the first connecting pipe 10 and is restricted in movement along the axis L in both the insertion direction and the extraction direction.

In this way, the second connecting pipe 20 can be connected to the first connecting pipe 10 with a single touch, and thus the branch duct 4 can be connected to the branch chamber 3 with a single touch. Therefore, even if the number of branch ducts 4 to be connected is large, the connection work can be performed efficiently in a short time.
Moreover, movement of the second connecting pipe 20 in the pulling direction (right direction in FIG. 4) can be restricted by the movable restricting portion 13, and the fitting direction of the second connecting pipe 20 (left direction in FIG. 4) by the fixed restricting portion 15. Therefore, the connection state between the branch duct 4 and the branch chamber 3 can be stabilized.

  As shown in FIG. 7A, when the leaf spring member 12 tries to deform in a direction in which the inclination becomes steep, the hooking portion 14 is hooked on the inner peripheral surface of the first connecting pipe 10. As a result, the insertion end 13e of the movable restricting portion 13 can be prevented from slipping out of the hole 11a. Therefore, as shown in FIG. 7B, the locking portion 21 of the second connecting pipe 20 can be reliably locked to the movable restricting portion 13, and the second connecting pipe 20 is pulled in the drawing direction (right side in the figure). Direction).

  Next, other embodiments (including modifications) of the present invention will be described. In the following embodiments, the same reference numerals are given to the drawings for the same configurations as those already described, and the description thereof is omitted.

Second Embodiment
The shape of the branch chamber 3 is not limited to a cylindrical shape.
As shown in FIG. 8, in the second embodiment, the branch chamber 3B has a rectangular parallelepiped or cube shape. The trunk duct 2 is branched into a plurality of branch ducts 4 via a branch chamber 3B. The ducts 2 and 4 and the branch chamber 3B are connected by air-conditioning path connection structures 1a and 1b similar to those in the first embodiment.
The branch chamber 3B may have a long box shape extending in one direction, and a plurality of air conditioning path connection structures 1a and 1b may be arranged at intervals in the longitudinal direction.

  The entire second connecting pipe 20 is accommodated between the fixed restricting portion 15 and the movable restricting portion 13 of the first connecting pipe 10. The second end portion 24B of the second connection pipe 20 is locked to the movable restricting portion 13 and constitutes an annular locking portion along the circumferential direction of the second connection pipe.

<Third Embodiment>
The air-conditioning path connection structure of the present invention is not limited to the connection between the branch chambers 3 and 3B and the ducts 2 and 4, and can also be applied to connect two ducts.
As shown in FIG. 9, in 3rd Embodiment, the branch duct 4C is branched from the peripheral side part of the intermediate part of the trunk duct 2C. The trunk duct 2C and the branch duct 4C are connected via the air conditioning path connection structure 1c. The structure of the air conditioning path connection structure 1c is the same as the air conditioning path connection structures 1a and 1b of the first embodiment. A connection port 2d is formed in the peripheral side portion of the trunk duct 2C (first air conditioning path member). A first connection pipe 10 is provided at the connection port 2d. A second connection pipe 20 is provided at the end of the branch duct 4C (second air conditioning path member). The second connecting pipe 20 is fitted on the outer periphery of the first connecting pipe 10, and the movement is restricted by the movable restricting portion 13 and the fixed restricting portion 15 of the leaf spring member 12.

<Fourth embodiment>
FIG. 10 shows a fourth embodiment of the present invention.
In the fourth embodiment, a ring portion 25 is formed in the middle portion of the second connection pipe 20. The ring portion 25 is raised in a semicircular cross section from the second connection pipe 20 to the outer side in the radial direction, and has an annular shape over the entire circumference of the second connection pipe 20. A locking portion 21 is provided on the first end portion 23 side (left side in FIG. 10) from the ring portion 25 in the second connection pipe 20 and in the immediate vicinity of the ring portion 25. The second end portion 24 of the second connection pipe 20 extends beyond the first connection pipe 10 in the distal direction of the first connection pipe 10 (rightward in FIG. 10).

  An annular fastening band 26 is wound around the end of the branch duct 4. Screws 27 are provided at one or a plurality of locations in the circumferential direction of the fastening band 26. The screw 27 passes through the fastening band 26 and the branch duct 4, and further passes through a portion of the second connection pipe 20 that extends in the distal direction (rightward in FIG. 10) from the first connection pipe 10. Thereby, the connection strength between the branch duct 4 and the second connection pipe 20 is ensured.

  A leaf spring member 30 is provided on the first connection pipe 10. The leaf spring member 30 integrally includes a fixed portion 31, a leaf spring portion 32, a movable restriction portion 33, and a hooked portion 34. Similar to the leaf spring member 12 of the first embodiment (FIG. 4), the fixed portion 31 is fixed to the inner peripheral surface of the tube wall 11 of the first connection tube 10. The leaf spring portion 32 extends from the fixed portion 31 toward the proximal end side (left side in FIG. 10) of the first connection tube 10 and is inclined radially outward of the first connection tube 10, so that the hole portion 11 a. It protrudes outside the first connecting pipe 10 through the first connecting pipe 10.

  The movable restricting portion 33 is connected to the free end portion of the leaf spring portion 32 at an acute angle. The movable restricting portion 33 (vertical portion) extends straight in the radial direction of the first connecting pipe 10 and is inserted into the first connecting pipe 10 through the hole 11a. The attached portion 34 is connected to the end of the movable restricting portion 33 in the first connecting pipe 10. The attached portion 34 extends obliquely from the movable restricting portion 33 to the inside in the radial direction of the first connection tube 10 and to the distal end side (right side in FIG. 10) of the first connection tube 10.

When the second connecting pipe 20 is inserted, the leaf spring portion 32 is elastically deformed so as to be pushed by the locking portion 21 and retracted radially inward of the first connecting pipe 10.
In the connected state of the first connecting pipe 10 and the second connecting pipe 20, the ring part 25 of the second connecting pipe 20 covers the leaf spring part 32. The leaf spring portion 32 may enter the ring portion 25. Further, the locking portion 21 is locked by hitting the movable restricting portion 33. Due to this locking, the movement of the second connecting pipe 20 is restricted in the drawing direction (the front end side of the first connecting pipe 10, the right side in FIG. 10).

  In the fourth embodiment, the leaf spring member 30 is moved inward in the radial direction of the first connecting pipe 10 by hooking and pulling the hooking means 5 such as a hook or a strap from the inside of the branch chamber 3 to the hooked portion 34. It can be elastically deformed to retract. Thereby, the movement restriction | limiting in the extraction direction (right direction in FIG. 10) of the 2nd connecting pipe 20 is cancelled | released, and the 2nd connecting pipe 20 can be pulled out from the 1st connecting pipe 10, and can be isolate | separated. Therefore, it is possible to redo the connection operation or to easily perform the disassembly / removal work.

  The entire outer peripheral surface of the second connection pipe 20 is covered with a heat insulating sheet 28. The intermediate portion of the heat insulating sheet 28 is raised in a semicircular shape in accordance with the shape of the ring portion 25.

  An annular flange 23f is formed at the first end 23 of the second connection pipe 20 so as to protrude radially outward. The heat insulating sheet 28 covers the annular flange portion 23f so as to go around from the outer peripheral edge of the annular flange portion 23f to the surface facing the heat insulating packing 17. The heat insulating sheet 28 is pressed against the heat insulating packing 17. The annular flange 23f is locked to the fixing restricting portion 15 with the heat insulating sheet 28 and the heat insulating packing 17 interposed therebetween. Due to this locking, the movement of the second connecting pipe 20 is restricted in the insertion direction (the base end side of the first connecting pipe 10, left side in FIG. 10).

<Fifth Embodiment>
FIG. 11 shows a fifth embodiment of the present invention.
In the fifth embodiment, the leaf spring portion 42 of the leaf spring member 40 is semicircular. Specifically, the leaf spring member 40 integrally includes a fixed portion 41, a semicircular leaf spring portion 42, a hooking portion 44, and a hooking portion 45. The point to which the to-be-fixed part 41 is being fixed to the internal peripheral surface of the pipe wall 11 of the 1st connecting pipe 10 is the same as that of 1st Embodiment (FIG. 4) etc. A leaf spring portion 42 extends from the fixed portion 41 to the proximal end side (left side in FIG. 11) of the first connecting pipe 10. The leaf spring portion 42 is curved in a semicircular shape, and protrudes from the hole portion 11a to the outer side in the radial direction of the first connecting pipe 10.
When the second connecting pipe 20 is inserted, the leaf spring portion 42 is pushed by the second connecting pipe 20, so that the leaf spring member 40 is elastically deformed so as to be retracted radially inward of the first connecting pipe 10.

  A ring portion 25 is formed in the second connecting pipe 20 as in the fourth embodiment (FIG. 10). In the connection state between the connecting pipes 10 and 20, the ring portion 25 covers the semicircular leaf spring portion 42. A central portion of the leaf spring portion 42 enters the ring portion 25. A quarter circle portion 42b on the free end side (left side in FIG. 11) of the leaf spring portion 42 is a movable restricting portion. When the quarter-circle portion 42b (movable restricting portion) is locked to the ring portion 25, the second connecting pipe 20 is restricted from moving in the drawing direction (right direction in FIG. 11).

  A free end portion (left end portion in FIG. 11) of the leaf spring portion 42 is inserted into the first connecting pipe 10 from the hole portion 11a. A hook 44 is connected to the free end of the leaf spring 42. The hooking portion 44 extends along the inner peripheral surface of the first connecting pipe 10, thereby preventing the free end portion of the leaf spring portion 42 from slipping out of the hole portion 11 a.

A hooked portion 45 is connected to the hook portion 44. The attached portion 45 protrudes inward in the radial direction of the first connecting pipe 10 and is bent in an L shape toward the branch duct 4 side (right side in FIG. 11).
Similar to the fourth embodiment (FIG. 10), the hooking means 5 is hooked and pulled from the inside of the branch chamber 3 to the hooked portion 45, whereby the leaf spring portion 42 is removed from the ring portion 25, and the second connecting pipe 20 can be pulled out from the first connecting pipe 10.

<Sixth Embodiment>
12 and 13 show a sixth embodiment of the present invention.
6th Embodiment is related with the modification of 4th Embodiment (FIG. 10), and the latching | locking part is comprised by the member different from the 2nd connection pipe 20, and is cyclic | annular. Specifically, as shown in FIG. 12, a locking cylinder member 50 is attached to the second connection pipe 20. As shown in FIG. 13, the locking cylinder member 50 integrally includes a locking part 51 and a cylinder part 52. As shown in FIG. 12, the cylindrical portion 52 is fixed to the inner peripheral surface of the second connection pipe 20. The cylinder part 52 is arrange | positioned rather than the ring part 25 at the 1st end part 23 side (left side in FIG. 12). An annular gap 50 e is formed between the inner peripheral surface of the cylindrical portion 52 and the outer peripheral surface of the first connecting pipe 10.

A locking portion 51 is provided at the end of the cylindrical portion 52 on the ring portion 25 side (right side in FIG. 12). As shown in FIG. 13, the locking portion 51 has an annular shape over the entire circumference of the cylindrical portion 52, and by extension, has an annular shape along the circumferential direction of the second connecting pipe 20. As shown in FIG.12 and FIG.13, the latching | locking part 51 is diameter-reduced in the taper shape toward the ring part 25 side (right side in FIG. 12). The distal end portion of the locking portion 51 abuts against the movable restricting portion 33 of the leaf spring member 30 and is locked. Due to this locking, the movement of the second connecting pipe 20 is restricted in the drawing direction (right side in FIG. 12).
Since the locking portion 51 is annular, it is easy to adjust the angle of the second connecting pipe 20 with respect to the first connecting pipe 10, or it is not necessary to adjust the angle.

<Seventh embodiment>
FIG. 14 shows a seventh embodiment of the present invention.
In the seventh embodiment, the leaf spring portion 46 of the leaf spring member 40F has a pair of inclined piece portions 46a and 46b and is folded into a triangular shape or a mountain shape. One oblique piece 46a extends obliquely outward in the radial direction of the first connecting pipe 10 from the fixed part 41 toward the proximal end side (left side in FIG. 14) of the first connecting pipe 10, and extends outward from the hole 11a. It is protruded to. The other oblique piece 46b forms an angle with respect to the oblique piece 46a and extends obliquely inward in the radial direction of the first connecting pipe 10 toward the proximal end side (left side in FIG. 14) of the first connecting pipe 10. ing. The inclined piece 46b constitutes a movable restricting portion.
When the second connecting pipe 20 is inserted, the leaf spring member 40 </ b> F is elastically deformed so as to be retracted radially inward of the first connecting pipe 10 by the inclined piece 46 a being pushed by the second connecting pipe 20.

  The inner diameter of the second connection pipe 20 is slightly larger than the outer diameter of the first connection pipe 10 or substantially equal to the outer diameter of the first connection pipe 10. The inner peripheral surface of the second connection pipe 20 is substantially in contact with the outer peripheral surface of the first connection pipe 10.

  The cross section of the ring portion 25F of the second connecting pipe 20 has a triangular shape or a mountain shape in accordance with the cross sectional shape of the leaf spring portion 46. The leaf spring part 46 is fitted in the ring part 25F. The second connecting pipe 20 is pulled out in the pulling direction (rightward in FIG. 14) by the engagement between the slant piece 46b (movable restricting portion) of the leaf spring portion 46 and the slope portion 25e on the flange portion 23f side of the ring portion 25F. Is restricted from moving to. The slope portion 25e of the ring portion 25F constitutes a locking portion that extends in an annular shape along the circumferential direction of the second connecting pipe 20.

<Eighth Embodiment>
FIG. 15 shows an eighth embodiment of the present invention.
In the eighth embodiment, the ring portion 25G of the second connecting pipe 20 has a quadrangular cross section. The leaf spring member 30G has the same shape as the leaf spring member 30 of the fourth embodiment (FIG. 10).
The leaf spring part 32 is fitted in the ring part 25G. When the second connecting pipe 20 is pulled out, the movable restricting portion 33G comes into contact with the wall portion 25h on the flange portion 23f side (left side in FIG. 15) of the ring portion 25G. As a result, the second connecting pipe 20 is restricted from being pulled out. The wall portion 25h of the ring portion 25F constitutes a locking portion that extends in an annular shape along the circumferential direction of the second connecting pipe 20.

<Ninth Embodiment>
16 to 19 show a ninth embodiment of the present invention. As shown in FIG.16 and FIG.17, in 9th Embodiment, the cross-sectional shape of the ring part 22 of the 2nd connection pipe 20 is a right-angled triangle shape of an unequal side.
Specifically, the ring portion 22 includes a steeply inclined annular wall portion 22a (annular locking portion) and a gently inclined tapered wall portion 22b. In the ring portion 22, an annular wall portion 22 a is disposed on the branch chamber 3 side (left side in FIG. 16), and a tapered wall portion 22 b is disposed on the opposite side (right side in FIG. 16).

The steeply inclined annular wall portion 22 a is substantially orthogonal to the axis L of the connecting pipes 10 and 20 and has an annular shape over the entire circumference of the second connecting pipe 20. The steeply inclined annular wall portion 22a may be slightly inclined toward the side opposite to the branch chamber 3 toward the radially outer side.
The tapered wall portion 22b is inclined more gently than the steeply inclined annular wall portion 22a and in the opposite direction to the steeply inclined annular wall portion 22a, and is tapered.
As shown in FIGS. 16 and 17, the inside of the ring portion 22 is an annular space 22d. The annular space 22 d is continuous with the internal space of the second connection pipe 20.

  As shown in FIG. 16, the branch duct 4 covers the outer periphery of the second connection pipe 20. The branch duct 4 includes a thick duct body 4a and a thin duct end 4e. The ring body 22 is covered with the duct body 4a. The duct end 4e is disposed on the outer peripheral portion on the branch chamber 3 side of the ring portion 22 in the second connecting pipe 20, and reaches the annular flange 23f.

A strip 26B is wound around the outer periphery of the duct end 4e in an annular shape. The strip 26B is configured by a string, a wire, a wire, a rubber band, or the like. The branch duct 4 is bound to the second connecting pipe 20 by the strip 26B.
In addition, in FIG. 16 etc., illustration of the heat insulation sheet 28 (FIG. 3) etc. is abbreviate | omitted.

The branch duct 4 and the second connecting pipe 20 are assembled as follows.
As shown in FIG. 18A, the second connection pipe 20 is inserted into the branch duct 4. Then, as shown in FIG. 18B, the duct end portion 4e rides on the tapered wall portion 22b and is gradually expanded by being guided by the tapered wall portion 22b. Thereby, as shown in FIG. 18C, the branch duct 4 can be easily put on the outer periphery of the second connection pipe 20. Subsequently, the strip 26B is wound around the outer periphery of the duct end 4e and tied.

As shown in FIG. 17, the first connecting pipe 10 is provided with a plurality of leaf spring members 60. In the figure, three leaf spring members 60 are arranged at intervals of 120 ° in the circumferential direction of the first connecting pipe 10, but two or four or more leaf spring members 60 are arranged around the first connecting pipe 10. You may arrange | position at intervals in the direction.
As shown in FIGS. 16 and 17, a plurality of holes 11 a are formed in the tube wall 11 of the first connection tube 10. The hole 11a corresponds to the leaf spring member 60 on a one-to-one basis.

As shown in FIG. 19, the leaf spring member 60 is formed by bending a rectangular flat steel plate and includes a fixed portion 61 and a leaf spring portion 62. A crease line 63 is formed between the fixed portion 61 and the leaf spring portion 62.
As shown in FIG. 16, the fixed portion 61 is fixed to a portion on the distal end side (right side in FIG. 16) with respect to the hole portion 11 a on the inner peripheral surface of the first connecting pipe 10.

The leaf spring part 62 extends obliquely from the fixed part 61 to the branch chamber 3 side (left side in FIG. 16) and radially outward of the first connecting pipe 10. The leaf spring portion 62 protrudes outside the first connecting pipe 10 through the hole portion 11a.
As shown in FIG. 19, the angle θ ₆₂ of the leaf spring portion 62 with respect to the direction parallel to the axis L (left-right direction in the figure) is about θ ₆₂ = 5 ° to 50 °.
A free end portion of the leaf spring portion 62 opposite to the fixed portion 61 is a movable restricting portion 62e.

  The leaf spring 62 can be elastically deformed so that the inclination angle is increased or decreased by the force along the radial direction of the first connecting pipe 10. Accordingly, the movable restricting portion 62e is displaced in the radial direction of the first connecting pipe 10. When the force is released, the leaf spring portion 62 elastically returns to the original inclination angle.

  When connecting the branch duct 4 to the branch chamber 3, the second connection pipe 20 is fitted to the outer periphery of the first connection pipe 10. In the middle of the fitting operation, the second connecting tube 20 hits the leaf spring portion 62, and the leaf spring portion 62 is pushed inward in the radial direction. When the ring portion 22 comes to a position where it matches the leaf spring portion 62, the leaf spring portion 62 is elastically returned outward in the radial direction. In this way, the first connecting pipe 10 and the second connecting pipe 20 can be connected with one touch, and the branch duct 4 can be connected to the branch chamber 3 with one touch.

As shown in FIG. 16, in the connected state of the first connecting pipe 10 and the second connecting pipe 20, the ring portion 22 covers the leaf spring portion 62, and the leaf spring portion 62 enters the annular space 22 d in the ring portion 22. It has entered. The movable restricting portion 62e at the end of the leaf spring portion 62 hits the steeply inclined annular wall portion 22a of the ring portion 22 and is locked. This restricts the movement of the second connecting pipe 20 to the drawing side (right side in FIG. 16). As a result, the second connecting pipe 20 and thus the branch duct 4 are connected to the first connecting pipe 10 so that they cannot be pulled out.
Covering the leaf spring portion 62 with the ring portion 22 can prevent the insulating material of the branch duct 4 from being damaged by the leaf spring portion 62. Further, deformation and damage of the leaf spring portion 62 can be prevented.

<Tenth Embodiment>
As shown in FIG. 20, the tenth embodiment relates to a modification of the leaf spring member in the ninth embodiment (FIGS. 16 to 19). The leaf spring member 60B according to the tenth embodiment is formed by bending a substantially L-shaped flat steel plate, and includes a fixed portion 61 and a leaf spring portion 62 provided on one side thereof.

The fixed portion 61 has a rectangular shape, and the longitudinal direction thereof is directed to the circumferential direction of the first connection tube 10, and the short side direction is directed to the axial direction of the first connection tube 10. The fixed portion 61 is fixed to the side of the hole portion 11 a in the circumferential direction of the first connecting pipe 10. By doing so, the length _L10e of the front end side (right side in FIG. 20) of the hole 12 in the first connecting pipe 10 can be shortened.

  The leaf spring part 62 protrudes obliquely from one side in the longitudinal direction of the fixed part 61 to the branch chamber 3 side (left side in FIG. 20) and radially outward of the first connecting pipe 10. A crease line 63 is formed between the leaf spring portion 62 and the fixed portion 61.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
In the first embodiment (FIGS. 1 to 6), the first connection pipe 10 may be provided in the branch duct 4, and the second connection pipe 20 may be provided in the branch chamber 3. That is, the branch duct 4 may constitute a “first air conditioning path member”, and the branch chamber 3 may constitute a “second air conditioning path member”. The same applies to the second embodiment (FIG. 8).
In the third embodiment (FIG. 9), the first connecting pipe 10 may be provided in the branch duct 4C, and the second connecting pipe 20 may be provided in the trunk duct 2C. That is, the branch duct 4C may constitute a “first air conditioning path member”, and the trunk duct 2C may constitute a “second air conditioning path member”.
The upstream air conditioning path connection structure 1a may be different from the downstream air conditioning path connection structure 1b.
The air-conditioning path connection structure of the present invention can also be applied to a connection portion between an air conditioner outlet and a duct. One of the first air conditioning path member and the second air conditioning path member may be a lead-out member having a lead-out port from the air conditioner, and the other may be a duct.
The air-conditioning path connection structure of the present invention can also be applied to a connection portion between a duct and an indoor outlet. One of the first air conditioning path member and the second air conditioning path member may be a duct, and the other may be a blowing member having an indoor outlet.
The air-conditioning path connection structure of the present invention can also be applied to a connection portion between a duct and an outdoor vent. One of the first air conditioning path member and the second air conditioning path member may be a duct, and the other may be a ventilation port member having an outdoor ventilation port.
The flange-shaped fixing restricting portion 15 at the middle portion of the first connecting pipe 10 may be omitted. The first end portion 23 of the second connecting pipe 20 is abutted against the wall surface of the branch chambers 3 and 3B (first air-conditioning path member) directly or via the heat-insulating packing 17 so that the branch chambers 3 and 3B (first The air conditioning path member) itself may constitute a “fixing restricting portion”.
The shape and structure of the leaf spring member of the first connecting pipe 10 and the annular locking portion of the second connecting pipe 20 are such that the second connecting pipe 20 can be inserted into the first connecting pipe 10 and the second connecting pipe 20 is the first. As long as the withdrawal from the connecting pipe 10 can be regulated, the invention is not limited to the embodiment, and can be modified as appropriate.
The annular locking portion of the second connection pipe 20 is not limited to the ring extending over the entire circumference of the second connection pipe 20, and may be a ring that is discontinuous in the circumferential direction. The plurality of locking portions may be arranged annularly at intervals in the circumferential direction of the second connecting pipe 20, and the plurality of locking portions may constitute the annular locking portion.
You may combine the element of several embodiment, such as replacing the leaf | plate spring member 30 of 6th Embodiment (FIG. 12) with the leaf | plate spring member 40 etc. of 5th Embodiment (FIG. 11).

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

L axis 1 air-conditioning equipment 1a, 1b air-conditioning path connection structure 1c air-conditioning path connection structure 2C trunk duct (second air-conditioning path member)
3,3B Branch chamber (first air-conditioning channel member)
4 branch duct (second air-conditioning channel member)
4C Branch duct (second air-conditioning path member)
5 hooking means 10 first connecting pipe 11 tube wall 11a hole 12 leaf spring member 12e free end 13 movable restricting part 13e insertion end 14 hooking part 15 fixing restricting part 20 second connecting pipe 21 locking part 22 ring Part 22a Steeply inclined annular wall (annular locking part)
22b Tapered wall 23 first end (base end side end)
23f Annular collar (base end side end)
24B 2nd end part (locking part)
25e Slope (locking part)
25h Wall (locking part)
30, 30G Leaf spring member 33, 33G Movable restricting part 34 Covered part 35 Corner (movable restricting part)
40, 40F leaf spring member 42b quarter-circle part (movable restricting part)
45 Hooking part 44 Hooking part 46b Slope part (movable restricting part)
51 Locking part
60 leaf spring member 62 leaf spring portion 62e movable restricting portion 60B leaf spring member

Claims (6)

An air conditioning path connection structure for connecting the first air conditioning path member and the second air conditioning path member,
A first connecting pipe protruding in the axial direction from the first air conditioning path member;
A second connection pipe provided on the second air-conditioning path member and fitted on an outer periphery of the first connection pipe;
A leaf spring member that obliquely protrudes radially outward from the pipe wall of the first connection pipe toward the first air conditioning path member side, and is elastically deformable in the radial direction,
The leaf spring member is provided with a movable restricting portion, and the first connecting pipe or the first air-conditioning path member closer to the base end side than the leaf spring member is provided with a fixing restricting portion,
The air-conditioning path connection structure, wherein the second connecting pipe is restricted from moving to both sides in the axial direction by the movable restricting portion and the fixed restricting portion.   2. The air conditioning path connection structure according to claim 1, wherein the second connection pipe has an annular locking portion that is locked to the movable restriction portion.   The second connecting pipe has a locking portion that is locked to the movable restricting portion, and the locking portion is opposite to the first air-conditioning path member from the inner peripheral surface of the second connecting pipe; The air-conditioning path connection structure according to claim 1, wherein the air-conditioning path connection structure projects obliquely toward the inside of the second connection pipe. A hole is formed in the tube wall of the first connection tube,
The said leaf | plate spring member is protruded to the outer side of the said 1st connection pipe while being fixed to the internal peripheral surface of the said 1st connection pipe through the said hole. The air conditioning path connection structure according to Item 1. A hole is formed in the tube wall of the first connection tube,
The movable restricting portion is inserted into the first connecting pipe through the hole from the outside of the first connecting pipe;
The hook part which faces the inner peripheral surface of the said 1st connecting pipe is provided in the edge part by the side of the insertion of the said movable control part, The any one of Claims 1-4 characterized by the above-mentioned. Air conditioning path connection structure.
Road connection structure. A hole is formed in the tube wall of the first connection tube,
The movable restricting portion is inserted into the first connecting pipe through the hole from the outside of the first connecting pipe;
The air-conditioning path connection according to any one of claims 1 to 5, wherein a hooked portion that can be hooked on a hooking means is provided at an insertion side end of the movable restricting portion. Construction.

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