JP6942661B2 - Connection structure, connection body, and connection device for corrugated pipe - Google Patents

Description

The present invention relates to a structure of a connecting portion for connecting a corrugated pipe to a connecting body having a tubular connecting portion at the end of the corrugated pipe, a connecting body, and a connecting device for the corrugated pipe.
In the present specification, the "corrugated pipe" is made of resin in which annular convex portions and annular concave portions are alternately provided on the outer peripheral surface of the pipe, or spiral convex portions are continuously provided on the outer peripheral surface of the pipe. Refers to a tube, and "nominal diameter" refers to the "inner diameter" or "approximate inner diameter" of the corrugated tube used to specify the size of the corrugated tube.

As a connection structure of the corrugated pipe 3 which is a kind of corrugated pipe, as disclosed in Patent Document 1, a pair on the inner peripheral surfaces of both ends in the axial direction of the cylindrical joint body (connecting body) 1. The locking projections 8 of the joints 8 are formed so as to face each other, and each corrugated pipe 3 is pushed into the inside from both ends of the joint body 1, and a specific ridge 7 on the outer circumference thereof is formed on the inner circumference of the joint body 1. By arranging it inside the locking protrusion 8 on the surface, the ridge 7 and the locking protrusion 8 are locked to each other to prevent the corrugated pipe 3 from coming out from the joint body 1. , Two corrugated pipes 3 are connected via the joint body 1.

Therefore, the joint body 1 can only connect one type of corrugated tube 3 having a specific nominal diameter, and in the connected state, the locking projection 8 of the joint body 1 and the protrusion of the corrugated tube 3 Since the Article 7 is locked with a gap along the pipe axis direction of the corrugated pipe 3, the corrugated pipe 3 cannot be connected to the joint body 1 in an immovable state. The connection state is unstable due to rattling, and the locking projection 8 of the joint body 1 and the ridge 7 of the corrugated tube 3 are simply locked in a state of rattling. Since watertightness was not ensured, there was a risk of water leakage at the connection.

Japanese Unexamined Patent Publication No. 8-145261

An object of the present invention is to insert and connect two types of corrugated tubes having different nominal diameters to a cylindrical connecting portion without "rattling".

The invention of claim 1 for solving the above problem is a structure of a cylindrical connecting portion that can be connected by inserting the ends of two types of corrugated tubes having different nominal diameters.
The connection portion includes an insertion hole that allows insertion of a corrugated pipe having each nominal diameter, and an elastically deformable locking restricting portion that enters a concave portion on the outer surface of the corrugated pipe and regulates escape in the pipe axial direction. ,
On the inner peripheral surface of the insertion hole of the connection portion, which is deeper than the locking restricting portion, the front side has a larger diameter than the outer diameter of the large-diameter corrugated pipe, and the corrugated pipe having a smaller diameter toward the back. A tapered surface with a diameter smaller than the outer diameter is formed over the entire circumference.
The locking restricting portion enters into any of the outer surface recesses of each of the two types of corrugated pipes having different nominal diameters, and is shared by the two types of corrugated pipes.
In a state where the corrugated tubes having different nominal diameters are inserted into the insertion holes of the connection portion and reach the tapered surface, the small diameter corrugated tube is the tip of the large diameter corrugated tube on the tapered surface. Each of the corrugated pipes inserted into the insertion hole, which is abutted at a portion further back than the abutting portion, has a portion arranged at the tip thereof behind the locking restricting portion. Each corrugated pipe is characterized in that it is prevented from coming off by the locking restricting portion in a state of being compressed and deformed in the pipe axis direction.

According to the invention of claim 1, the inner peripheral surface behind the locking restricting portion in the insertion hole of the connecting portion has a larger diameter on the front side than the outer diameter of the large-diameter corrugated pipe, and a wave having a smaller diameter toward the back. because it is formed over the entire periphery a tapered surface such that smaller than the outer diameter of the biasing tube, two kinds corrugated tube of DN is to different from the insertion length to the insertion hole, any With the tip of the pipe pressed against the tapered surface, the locking restricting portion enters a specific outer surface recess and is locked, so that two types of corrugated pipes with different nominal diameters are connected to the same connecting portion. Can be connected. That is, when a large-diameter corrugated tube is inserted into the insertion hole of the connection portion, the locking restricting portion is elastically deformed outward by the outer surface convex portion, so that the large-diameter corrugated tube is inserted into the insertion hole. Will be done. The large-diameter corrugated pipe is inserted until the maximum insertion length is secured without compressing and deforming the inner part of the locking restricting portion in the pipe axis direction, and then the corrugated pipe is further inserted inward. When pushed in, the tip of the large-diameter corrugated pipe is pressed against the tapered surface, so that the inner part of the locking restricting part is compressed and deformed by a predetermined length in the pipe axis direction, and the large diameter is The locking restricting part is restored to its original shape in a state where the specific outer surface recess of the corrugated pipe and the locking restricting portion are pressed against each other without a gap along the pipe axis direction of the large diameter corrugated pipe. Then, it enters the outer surface recess of the large-diameter corrugated pipe and is locked. A small- diameter corrugated tube with a small nominal diameter is a point where a large -diameter corrugated tube with a large nominal diameter is pressed against a small inner diameter portion of a tapered insertion hole, that is, a wave with respect to an insertion hole at a connection portion. The two types of corrugated pipes are connected to the connection in the same state, except that the insertion length of the pipe is long.

Therefore, according to the invention of claim 1, since the front side of the insertion hole is larger than the outer diameter of the corrugated tube with a large diameter, in the connected state of the large-diameter and small-diameter tubes with each wave to the connection portion, the connection portion The locking regulation part of is pressed against the outer surface recess of each corrugated pipe without a gap along the pipe axis direction, and corresponds to the outer diameter of each corrugated pipe on the tapered surface of the insertion hole of the connection part. When the tip of each corrugated pipe is pressed against the squeezed portion, the portion inside the locking restricting portion of each corrugated pipe is compressed and connected in the pipe axis direction, so that the nominal diameter Two different types of corrugated pipes have different insertion lengths for each corrugated pipe into the insertion hole of the connection part, and two types of corrugated pipes with different nominal diameters can be used for the same connection part without "rattling". You can connect. Further, the portion corresponding to the outer diameter of the tube with each wave at the tapered surface of the insertion hole of the connecting portion, the tip portion of each of the corrugated tube is pressed, the watertight of the inner peripheral surface of the insertion hole and the drainage tube Since it is secured, water leakage at the connection portion between the connecting body and the corrugated pipe is eliminated. Further, since a tapered surface is formed on the entire circumference of the insertion hole of the connecting portion, when two types of corrugated tubes having different nominal diameters are inserted into the insertion hole and connected, each corrugated tube having a different nominal diameter is attached. The pipe is connected in a state in which the center of the pipe is aligned with the center of the insertion hole of the connecting portion without being displaced from the center of the insertion hole.

The invention of claim 2 is a structure of a tubular connecting portion that can be connected by inserting the ends of two types of corrugated tubes having different nominal diameters.
The connection portion includes an insertion hole that allows insertion of a corrugated pipe having each nominal diameter, and an elastically deformable locking restricting portion that enters a concave portion on the outer surface of the corrugated pipe and regulates escape in the pipe axial direction. ,
On the inner peripheral surface of the insertion hole of the connection portion, which is deeper than the locking restricting portion, the front side has a diameter smaller than the outer diameter of the large-diameter corrugated pipe and smaller than the outer diameter of the small-diameter corrugated pipe. A tapered surface having a large diameter and a diameter smaller than the outer diameter of the corrugated tube having a smaller diameter is formed over the entire circumference toward the back, and a large diameter wave is formed on the front side of the tapered surface in the insertion hole. A contact step surface is formed with which the tip of the attached pipe abuts.
The locking restricting portion enters into any of the outer surface recesses of each of the two types of corrugated pipes having different nominal diameters, and is shared by the two types of corrugated pipes.
In a state where the end of the large-diameter corrugated pipe is inserted into the insertion hole of the connection portion, the large-diameter corrugated pipe is in contact with the contact step surface by the locking restricting portion. In a state where the end portion of the corrugated pipe having a small diameter is inserted into the insertion hole of the connection portion, the tip portion thereof is brought into contact with the tapered surface and the locking restricting portion at the tip portion thereof. It is characterized in that the locking restricting portion prevents the portion from coming out in a state where the portion arranged in the back is compressed and deformed in the pipe axis direction.

A second aspect of the present invention, the front side of the insertion hole is smaller than the outer diameter of the corrugated tube having a large diameter, much larger than the outer diameter of the small diameter corrugated tube, the distal end surface of the corrugated tube having a large diameter or which near surface, said in contacts the contact step surface on the near side of the insertion hole, enters the engagement restricting portion on the outer surface concave portion of the large-diameter corrugated tube, corrugated tube connected to the connection portion At the same time, the small-diameter corrugated tube is compressed by a predetermined length in the tube axis direction, the tip of the tube is inserted into the insertion hole by a predetermined length, and the tip is the inner peripheral surface of the insertion hole. It is pressed and connected to.

The invention of claim 3 is a connecting body having a connecting portion having the structure according to claim 1 or 2.

Since the invention of claim 3 is grasped from the aspect of the "connecting body" provided with the "structure of the connecting portion" according to the invention of claim 1 or 2, the substantial effect is that of claim 1. It is equivalent to the invention.

According to the invention of claim 4, in the invention of claim 3, a connecting portion is formed on one end side to which a corrugated pipe as a drainage pipe for drainage of air conditioning equipment is inserted and connected, and on the other end side. A tubular connecting body having a discharge opening for discharging the drainage drainage flowing from the corrugated pipe is provided.
The connection portion has the structure according to claim 1 or 2.
Inside the main body of the connecting body, a valve body is provided which normally closes the discharge opening and opens when drain drainage flows in from one end side to form a drainage channel.
The valve body has a valve plate support portion arranged in the center of the tubular connection body body, a valve shaft portion supported by the valve plate support portion, and a valve shaft portion that projects outward from the valve shaft portion. It is characterized by having a flexible valve plate portion that is seated on an annular valve seat portion with a plate support portion inside.

According to the invention of claim 4 , a valve body is provided inside the main body of the connecting body, in which the discharge opening is always closed and when drain drainage flows in from one end side, the valve body is opened to form a drainage channel. Moreover, since the valve body includes a valve plate support portion, a valve shaft portion, and a valve plate portion, the following unique actions and effects are exhibited.

That is, when the connecting body according to claim 4 is connected to one of the ends of two types of corrugated pipes having different nominal diameters, the corrugated pipe is normally closed by the valve body that is normally closed. It is possible to prevent outside air, insects, etc. from entering the inside of the pipe, and the drainage flowing inside the corrugated pipe is flexible due to its flow force, and is a valve seated on the valve plate support. In the body, a drainage channel is formed by separating the entire outer peripheral portion from the valve plate support portion in a state where the central valve shaft portion is integrated with the valve plate support portion, and the body passes through the drainage channel. The drainage is discharged to the outside of the connection. Therefore, by connecting the connecting body according to the invention of claim 4 to the tip of the drain drain pipe of air conditioning equipment such as an air conditioner, the indoor unit prevents outside air from entering the indoor side. The generated drainage drainage can be drained outdoors.

The invention of claim 5 is a corrugated tube connecting device including the connecting body according to claim 3 or 4 and two types of corrugated tubes having different nominal diameters.

Since the invention of claim 5 is an expression of the invention of claim 3 or 4 grasped from the aspect of "connecting device for corrugated pipe", the same operation as that of the invention of claim 3 or 4. The effect is played.

According to the invention of claim 1, in the connected state of each corrugated pipe having a large diameter and a small diameter to the connecting portion, the locking restricting portion of the connecting portion is along the pipe axis direction with respect to the outer surface recess of each corrugated pipe. while pressure in the absence of clearance Te, the portion of the tapered surface of the insertion hole corresponding to the outer diameter of the corrugated tube, at the distal end portion of each of the corrugated tube is pressed, the locking of each corrugated pipe Since the inner part of the regulation part is compressed in the pipe axis direction and connected, the two types of corrugated pipes with different nominal diameters have different insertion lengths of each corrugated pipe into the insertion hole of the connection part. , Two types of corrugated pipes with different nominal diameters can be connected to the same connection part without "rattling". Further, since a tapered surface is formed on the entire circumference of the insertion hole of the connecting portion, when two types of corrugated tubes having different nominal diameters are inserted into the insertion hole and connected, each corrugated tube having a different nominal diameter is attached. The pipe is connected in a state in which the center of the pipe is aligned with the center of the insertion hole of the connecting portion without being displaced from the center of the insertion hole.
According to the invention of claim 2, only the corrugated tube having a small diameter is inserted into the insertion hole of the connection portion, the tip portion thereof abuts on the tapered surface, and the corrugated tube having a large diameter is inserted into the insertion hole. Although the configuration in which the connecting portion abuts on the contact step surface on the front side of the insertion hole is different from that of claim 1, the above-mentioned effects and effects equivalent to those of claim 1 are exhibited.

It is an exploded perspective view of the connection body main body B, the valve body V, and the discharge port forming body G of the divided structure constituting the connection body C which concerns on this invention. It is a vertical sectional view of the connection body C. It is a partially cutaway perspective view of the connection body C. It is a partially broken perspective view of the split connection body B ₂ on the downstream side, and the valve body V and the discharge port forming body G incorporated in the split connection body B _{2. It is a figure which shows the state which the outlet E 2} formed in the split connection body B ₂ is opened, (a) and (b) are the perspective view and the vertical sectional view, respectively, and (c) is It is a cross-sectional view _{of X 1-} X ₁ of (b). _{It is a figure which shows the state which the outlet E 2} formed in the split connection body B ₂ is closed by the discharge port forming body G, and (a) and (b) are the perspective view and the vertical sectional view, respectively. , (c) is a X ₂ -X ₂ line cross-sectional view of (b). It is a perspective view which shows the state which inserts the coin 48 into the cut groove 47 of the discharge port forming body G, and rotates the discharge port forming body G. It is a figure explaining that the valve body V is incorporated between each divided connection body B ₁ and B ₂ , and (a) and (b) are the disassembled perspective view and the perspective view immediately after assembly, respectively. .. (A) is a front view immediately after the valve body V is incorporated between the divided connection main bodies B ₁ and B _{2 , and (b) and (c) are Y 1} −Y of (a), respectively. It is sectional drawing of ₁ line and Z ₁ −Z _{1 line.} (A) state, after incorporating the valve V between the partitioned junction body B _1, B _2, which are integrally assembled with the divided connection body B _1, B ₂ are relatively rotated it is a front view of, (b), (c) is a cross-sectional view of a Y ₂ -Y _2-wire and Z ₂ -Z ₂ lines, respectively (a). It is a vertical cross-sectional view of the drain pipe pressure contact surface 11 of the insertion hole 10 of the split connection body B _{1 on the upstream side, and the drain pipe P 1 inserted into the insertion hole 10.} (A), (b), and (c) are vertical cross-sectional views showing a state in which the end portion of the drain pipe P _{1 is inserted into the insertion hole 10 of the split connection body B 1 on the upstream side and is connected.} Is. (A) and (b) are vertical cross-sectional views of the state in which the ends of the _{drain pipes P 1} and P ₂ are inserted into the insertion holes 10 of _{the split connection body B 1 on the upstream side and are connected to each other.} .. (A), (b), respectively a state where the top portion of the drainage pipe P ₁ to contact the stepped surface 15 of the split connecting body B ₁ of the upstream side 'are connected in contact, and the partitioned junction body B _first end of the drain pipe P ₂ is inserted into the 'insertion hole 10' is a longitudinal sectional view of the connected state. (A) and (b) are a perspective view of a state in which the connecting body C is connected to the tip of the _{vertically piped drainage pipe P 1} (P _{2), and the connection body C showing the flow of the drain drainage W.} It is a vertical sectional view. (A) and (b) are perspective views in a state where the connecting body C is connected to the tip of the horizontal pipe portion P ₁ c (P _{2 c) of the drain pipe P 1} (P _{2), and the drain drain W.} It is a vertical sectional view of the connection body C which shows the flow of. (A) and (b) are a perspective view of a state in which the connecting body C is connected in the middle of the _{vertically piped drainage pipe P 1} (P _{2), and a vertical section of the connecting body C showing the flow of the drain drainage W.} It is a top view.

Hereinafter, the present invention will be described in more detail with reference to examples. In FIGS. 1 to 4, the connecting body C according to the present invention comprises a corrugated pipe connected to a drain pan (neither shown) of an indoor unit of an air conditioning device such as an air conditioner to discharge drain drainage to the outside. There are cases where it is connected to the tip of the drain pipe P ₁ (P ₂ ) and cases where it is connected in the middle (intermediate part). _{When the} cylindrical connecting body B consisting of 1 and B _{2 and the split connecting bodies B 1} and B ₂ are integrally assembled, they are incorporated between the _{split connecting bodies B 1} and B _{2 indoors.} The valve body V that prevents outside air from entering the vehicle and the split connecting body B ₂ on the downstream side are fitted inside to form the discharge port E _1, and the split connecting body B ₂ on the downstream side is fitted in the circumferential direction. It is composed of an outlet forming body G that closes a large number of wide slit-shaped outlets E _{2 formed along the axial direction of the divided connecting body B 2} at equal intervals along the above. The main bodies B ₁ and B ₂ , the valve body V, and the discharge port forming body G of the divided connection bodies are all made of resin.

In the two types of drainage pipes P ₁ and P ₂ having different nominal diameters, the annular convex portion P ₁ a (P ₂ a) and the annular concave portion P ₁ b (P ₂ b) are alternately provided along the pipe axis direction. Therefore, it is composed of a flexible resin corrugated pipe, and _{one of two types of drain pipes P 1} and P ₂ is attached to the drain pipe connection portion 1 described later of the split connection main body B 1 on the upstream side. Selected and connected. The resin drainage pipes P ₁ and P _{2 are compressed and deformed in the annular recess P 1} b (P ₂ b) by the action of a compressive force along the pipe axis direction, so that the pipe axis direction The length along is slightly shorter. DN of the drainage pipe P _1, P ₂ are respectively "16" and "14".

Partitioned junction body B ₁ of the upstream side, as shown in FIGS. 1-3 and 8, a generally cylindrical, predetermined length of a portion of the upstream side is formed into a cylindrical shape, the drainage It is a drain pipe connecting portion 1 for inserting and connecting a pipe P ₁ (P ₂ ), and a pair of elastically deformable rectangular connecting pieces 3 are formed so as to face each other between a pair of axial slits 2. On the inner surface of each connection piece 3 on the upstream side, there is a locking regulation claw 4 that is locked in the annular recess P ₁ b (P _{2 b) of the drain pipe P 1} (P _{2) having a corrugated structure in the inserted state.} It is formed so as to project toward the direction. Of the drainage pipe connection portion 1 of the split connection body B ₁ , each of the square connection pieces 3 is formed to be thinner than the other portion of the drainage pipe connection portion 1 in order to facilitate elastic deformation. .. The insertion hole 10 of the substantially cylindrical split connection body B _{1 is a portion to be connected by inserting the end portion of the drain pipe P 1} (P ₂ ), and is formed from the locking regulation claw 4 in the insertion hole 10. The inner part is a drain pipe pressure contact surface 11 formed on a tapered surface such that the inner peripheral surface becomes smaller toward the inner side over the entire circumference thereof. Predetermined length of a portion of the downstream side of the split connecting body B ₁ represents, by internally fitted the divided connection body B ₂ on the downstream side, short cylinder assembled integrally with the divided connection body B ₂ An annular convex portion P ₁ a (P ₂ a) at _{the end of the drain pipe P 1} (P ₂ ) having a corrugated structure with respect to the drain pipe pressure contact surface 11 which is an inner fitting assembly portion 5 having a shape. It is connected to the drainage pipe pressure welding connection portion 6 to be pressure-welded, and is formed in a step shape by rapidly reducing the outer diameter. 13 is formed. A pair of elastically deformable assembly pieces 8 are formed in the inner fitting assembly portion 5 so as to face each other between a pair of slits 7 in the axial direction, and are formed on the outer peripheral surface of each assembly piece 8 on the free end side. Is formed with a locking protrusion 9 that is fitted and locked in each fitting locking hole 23 formed so as to face the _{main body B 2} of the split connecting body on the downstream side. The portion of the outer peripheral surface of the drainage pipe pressure welding connection portion 6 facing the inner fitting assembly portion 5, and the portion where the assembly pieces 8 are arranged, are the main bodies of the split connections on the upstream side and the downstream side. When B ₁ and B ₂ are integrally assembled, an arrangement position display mark 12 for displaying the arrangement position of each assembly piece 8 is formed. Each assembly piece 8 formed in the inner fitting assembly portion 5 is formed to be thin with respect to the remaining portion of the inner fitting assembly portion 5 in order to facilitate elastic deformation. The inner peripheral surface of the drain pipe pressure welding connection portion 6 of the split connection body B ₁ is pressure-welded to the annular convex portion P ₁ a (P ₂ a) at _{the end of the drain pipe P 1} (P _{2) having a corrugated structure.} , The drainage pipe pressure contact surface 11 is for compressing and deforming a portion having a predetermined length along the pipe axis direction, counting from the end of the drainage pipe P ₁ (P _2). , It is formed in a tapered surface shape so that the inner diameter gradually decreases from the drainage pipe connecting portion 1 toward the inner fitting assembly portion 5. The drainage pipe pressure contact surface 11 and the inner peripheral surface of the inner fitting assembly portion 5 are connected in a stepped shape.

As shown in FIGS. 1 to 6, the downstream side split connection body B ₂ has a cylindrical overall shape, and the portion having a predetermined length from the upper end surface 21 is fitted inside the _{split connection body B 1.} and fitted into the assembling portion 5 have a assembled portion 22 fitted to be assembled integrally, to the outer fitting assembling portion 22, formed on the inner fitting assembling portion 5 of the divided connecting body B ₁ Each fitting locking hole 23 for fitting and locking each locking protrusion 9 of the pair of assembled pieces 8 is formed so as to face each other. Each fitting locking hole 23 corresponds to each locking protrusion 9 _{being formed along the circumferential direction of the split connecting body B 1} along the circumferential direction of the split connecting body B _2. It is formed. The portion directly above each Hamagogakari stop holes 23 in the outer peripheral surface of the split connecting body B ₂ of the outer fitting assembly 22, each of the divided connection body B _1, B ₂ in a state of integrally assembled, divided The arrangement position display mark 20 arranged immediately below the arrangement position display mark 12 of the connecting body body B _{1 is formed.} From each Hamagogakari stop holes 23 in the inner circumferential surface of the split connecting body B ₂ portions extending on the upper end face 21 of the split connecting body B ₂ is partitioned junction member each assembling piece 8 of the main body B ₁ In order to facilitate the insertion of each locking protrusion 9 formed on the outer peripheral surface, a tapered assembling surface 38 gradually formed from each fitting locking hole 23 toward the upper end surface 21 is formed. (See FIGS. 1 and 2). A total of four fitting protrusions 31d formed on the outer peripheral portion of the seating body 31 which is described later and constitutes the valve body V are located on the inner peripheral surface of the split connecting body B _{2 at a predetermined length from the upper end surface 21.} The protrusion fitting grooves 24 for fitting the two are formed at equal intervals along the circumferential direction. Each protrusion fitting groove 24 is formed slightly deeper than each fitting locking hole 23.

Further, an abutting ring body in which the end surface of the outlet closing cylindrical wall 42 of the discharge port forming body G internally fitted from the lower end side is brought into contact with the central portion in the axial direction on the inner peripheral surface of the split connecting body body B _2. 25 is formed, and _{the portion immediately before the contact ring body 25 from the lower end surface 29 of the split connection body B 2} is an outlet forming portion 26, and a plurality of flows are formed in the outlet forming portion 26. The outlet E ₂ is formed in the axial direction in a state where the outlet E 2 is opened to the lower end surface 29 at regular intervals along the circumferential direction. The outlet forming body G has a shape in which two short cylindrical bodies having different outer diameters are integrated, and the outlet forming body G is internally fitted in the outlet forming portion 26 to form an outlet forming portion. A positioning protrusion 46 formed at a position facing the outer peripheral surface of the outlet closing cylindrical wall 42 having a large outer diameter of the discharge port forming body G is fitted to the portion of the abutting ring body 26 close to the contact ring body 25. Two sets of positioning fitting holes 27, 28, which are one-to-one sets for changing the discharge port forming body G to different positions along the circumferential direction and arranging them fixedly with respect to the outlet forming portion 26, are provided in the circumferential direction. It is formed at predetermined intervals. The positioning fitting holes 27, 28 of each pair of one-to-one pairs are formed so as to face positions that differ in phase by 180 ° along the circumferential direction, and are formed at predetermined intervals along the circumferential direction. One of the positioning fitting holes 27, 28 is _{formed between the adjacent outlets E 2} , and the wall thickness between the one positioning fitting holes 27, 28 of each set in the outlet forming portion 26 is set. By passing through the positioning protrusion 46 and forming a step on the inner peripheral surface to allow the discharge port forming body G to rotate with respect to the split connecting body main body B _{2 (outlet forming portion 26).} It is thinner than the other parts [see FIGS. 5 (c) and 6 (c)].

The valve body V incorporated between the pair of split connecting body bodies B ₁ and B ₂ is arranged in close contact with the ring-shaped seating body 31 and the downstream surface of the seating body 31, and is a valve at the center. It is composed of a flexible circular thin plate-shaped valve plate 33 that is integrally attached to the seating body 31 via a plate support portion 32. In the seating body 31, a plurality of arm portions 31b are integrally arranged inside the outer ring portion 31a in the radial direction, and the fitting hole for fitting the valve plate support portion 32 into the central portion where the arm portions 31b intersect. 31c is formed. The outer peripheral surface of the ring portion 31a of the seating member 31, at a plurality of fitting protrusions 31d fitted to projection groove 24 of the split connecting body B ₂ on the downstream side at equal intervals in the circumferential direction It is provided. Further, the openings formed between the plurality of arm portions 31b function as drainage passage ports 31e constituting the drainage channel of the drain drainage W. The valve plate support portion 32 is press-fitted into the fitting hole 31c of the seating body 31 from the downstream side in a press-fitted state, and the valve plate 33 is closely arranged on the seating surface on the downstream side of the seating body 31.

Therefore, the flexible thin plate-shaped valve plate 33 that is in close contact with the seating surface on the downstream side of the seating body 31 has a negative pressure on the indoor unit side of the air conditioner, so that the drain pipe P ₁ thereby preventing the entry of outside air to be flowed through (P ₂₎ the drainage pipe P ₁ indoors from the distal end opening of the (P _2), drain waste water W generated in the indoor unit, and the own weight and its flow force Together, the valve plate 33 is elastically deformed so as to be separated from the seating body 31, so that the valve plate 33 is discharged to the downstream side of the valve body V through the drainage passage port 31e.

Then, as shown in FIGS. 8 to 10, each fitting protrusion 31d of the seating body 31 constituting the valve body V is fitted into the plurality of protrusion fitting grooves 24 of the _{split connecting body main body B 2.} By inserting the seating body 31 to the forming end of each protrusion fitting groove 24, the seating body 31 is inserted slightly behind the fitting locking hole 23 in the _{split connecting body main body B 2.} Be placed. After that, as shown in FIG. 9, two facing portions selected from a total of four protrusion fitting grooves 24 formed in the outer fitting assembly portion 22 of _{the split connecting body main body B 2 on the downstream side.} a projection fitting groove 24, by inserting each locking projection 9 of the partitioned junction body B ₁ of the upstream side, the upper end face of the split connecting body B ₂ and the stepped surface 13 of the split connecting body B ₁ 21 is brought into contact with it. After that, when the upstream split connection body B ₁ is rotated by a predetermined angle with respect to the downstream split connection body B ₂ , each locking protrusion of each assembly piece 8 of _{the split connection body B 1 is performed.} The portion 9 is fitted into the fitting locking hole 23 of the split connecting body B _{2 , the split connecting bodies B 1} and B ₂ are integrally assembled, and the arrangement position display marks 12 and 20 are moved up and down. Match in direction. In this state, as shown in FIG. 2, the pair is assembled to the opposite portion of the ring portion 31a of the seating body 31 that is inserted to the back end with respect to _{the split connecting body main body B 2 on the downstream side.} When the tip surfaces of the pieces 8 come into contact with each other, the valve body V is immovably incorporated into the assembling portions of _{the pair of split connecting body bodies B 1} and B _2. Therefore, if a problem occurs in the valve body V during the use of the connecting body C, the pair of split connecting body bodies B ₁ and B ₂ can be separated and replaced with a new valve body V.

The split connector bodies B ₁ and B ₂ can be assembled by the following methods. That is, a pair of tapered assembling surfaces 38 formed so as to face the inner surface of the outer fitting assembling portion 22 of _{the split connecting body B 2} on the downstream side, and _{a pair of the split connecting body B 1} on the upstream side. When each locking protrusion 9 formed on the assembly piece 8 is arranged and the split connection body B _{1 is pressed against the split connection body B 2} as it is, each assembly piece 8 is slightly inward. After being elastically deformed, each locking protrusion 9 of each assembly piece 8 is fitted into each fitting locking hole 23 of _{the split connecting body main body B 2 on the downstream side, so that each assembly piece 8 is fitted.} Is restored to its original shape, and the main bodies B ₁ and B _{2 of} each split connector are assembled integrally.

As shown in FIG. 15B, when the drain drainage W flows from the upstream side to the downstream side of the valve body V, the flexible valve plate 33 is separated from the seating body 31. By being deformed, the drain drainage W is allowed to flow, and when the indoor side is in a negative pressure state, the valve plate 33 is in close contact with the seating body 31 to prevent the outside air from flowing into the indoor side. do.

Further, as shown in FIGS. 1 to 6, the discharge port forming body G internally fitted from the downstream side of the split connecting body main body B _{2 is formed by forming the drain drain W discharge port E 1 and} is a split connecting body. by changing the fixing position of the circumferential direction with respect to the main body B _2, performs the function of closing the split connector body B ₂ number of wide slit-shaped outlet E ₂ formed on the downstream side. The discharge port forming body G has a shape in which two bottomed short cylinders having significantly different outer diameters are integrated by sharing the bottom wall, and the bottomed short cylinder having a large outer diameter is the main body of the split connecting body. It is fitted in B _2, a flow outlet obstruction cylindrical wall 42 which closes the partitioned junction body B ₂ multiple outlet E ₂ formed in a small bottomed cylindrical body having an outer diameter of the split connector A rotation operation cylinder 43 that facilitates the operation of rotation when the outlet closing cylindrical wall 42 fitted to the main body B _{2 is rotated to change the fixed position, and is a connecting body.} It also has a function as a downstream connection portion for connecting _{the drain pipe P 1} (P ₂ ) on the downstream side to C.

That is, the outlet closing cylindrical wall 42 and the rotation operation cylinder 43 are integrated by a common bottom wall 44, and the outlet closing cylindrical wall 42 is formed on _{the downstream split connection main body B 2.} numerous outlet E ₂ as many wide slit-shaped drain drainage outlet opening 45 is formed open to the opening end side. One of the positioning fitting holes 27 and 28, which are formed in a pair with _{the split connecting body B 2} on the downstream side in a phase difference of 180 ° on the outer peripheral surface of the outlet closed cylindrical wall 42. Positioning protrusions 46 that are fitted to one of them are formed. The rotary operation cylinder 43 has a shape in which the cylindrical body is divided into two by forming cutting grooves 47 in the opposite positions in the axial direction, and for example, a coin 48 is inserted into each cutting groove 47. By doing so, in a state where the pair of positioning protrusions 46 are fitted into the pair of fitting holes 27 (28) of any set, the discharge port forming body G internally _{fitted in the split connecting body main body B 2 is formed.} , It is rotated by a large rotational force so that the operation of changing the fixed position can be easily performed (see FIG. 7). A locking collar portion 43a for locking _{the connected drainage pipe P 1} (P ₂ ) with a wave is formed on the outer periphery of the axial end portion of the rotation operation cylinder 43. The central portion of the bottom wall 44, numerous outlet E ₁ small outlet are combined is formed.

Further, a tapered surface shape of the drainage tube pressing surface 11 of the split connecting body B ₁ of the insertion hole 10 on the upstream side, two types of the dimensional relationships of the drainage pipe P _1, P ₂ is as follows. _{The largest inner diameter d 11} on the inlet side of the drain pipe pressure contact surface 11 is larger than the outer diameter D ₁ of the drain pipe P _{1 having a large nominal diameter (D 1} <d ₁₁ ), and the drain pipe pressure contact surface 11 The smallest inner diameter d ₁₂ on the back side is smaller than the outer diameter D ₂ of the drain pipe P _{2 having a small nominal diameter (D 2} > d ₁₂ ). _{Therefore, the tips of the drain pipes P 1} and P _{2 having} different nominal diameters inserted into the insertion hole 10 of the split connection main body B ₁ all come into contact with the middle portion of the drain pipe pressure contact surface 11 (pressure contact). The point of insertion is the same, except that the insertion length of the _{drainage pipe P 1 having} a large nominal diameter is shorter than the insertion length of the _{drainage pipe P 2 having a small nominal diameter.} By forming a straight inner peripheral surface 14 having the _{same inner diameter d 11} with a short length at the inlet of the drain pipe pressure contact surface 11, _{two types of drain pipes P 1} and P _{2 having} different nominal diameters, particularly The tip of the drain pipe P _{1 having} a large nominal diameter can be inserted without interfering with the inlet of the drain pipe pressure contact surface 11.

Therefore, in order to connect the drain pipe P ₁ having a large nominal diameter to the connecting body C, as shown in FIG. 12, _{the split connecting body main body B 1} on the upstream side is passed through the _{annular convex portion P 1 a.} The pair of connecting pieces 3 formed so as to face each other are elastically deformed outward by the _{annular convex portion P 1} a, and the action of restoring the original shape at the _{annular concave portion P 1 b is repeated to cause the drain pipe.} The _{inner (inner) portion of the pair of connecting pieces 3 in P 1} is not compressed and deformed in the pipe axis direction, and is inserted until the maximum insertion length is secured [see FIG. 12 (a)]. When the drain pipe P _{1 is pushed inward, the tip of the drain pipe P 1} is pressed against the drain pipe pressure contact surface 11 as shown in FIG. 12 (c) through the state shown in FIG. 12 (b). As a result, the portion of the drain pipe P ₁ inside the locking regulation claw 4 is compressed and deformed by a predetermined length in the pipe axis direction at _{the portion of the annular recess P 1 b, and the drain pipe P 1} is compressed. The pair of locking restricting claws 4 is restored to its original shape in a state where the specific annular recess P ₁ b and the locking restricting claw 4 are _{pressed against each other along the pipe axis direction of the drain pipe P 1 without a gap.} Then, it enters the annular recess P ₁ b of the drain pipe P _{1 and} is locked.

As a result, since there is no gap in the pipe axis direction between the connecting body C and the drain pipe P _{1 , the drain pipe P 1} is firmly connected to the connecting body C without "rattling" and drains. Since the tip of the pipe P ₁ is pressed against the drain pipe pressure contact surface 11 of the connecting body C, water leakage is eliminated at the connecting portion between the connecting _{body C and the drain pipe P 1.}

Further, in _{the case of the drainage pipe P 2 having} a small nominal diameter, as shown in FIG. 13, the drainage pipe P 2 is pressure-welded to the portion having a small inner diameter in the drainage pipe pressure contact surface 11 as compared with the _{drainage pipe P 1 having a large nominal diameter.} As a result, the insertion length of the connecting body C into the insertion hole 10 is different, and the specific annular recess P _{2 b of the drain pipe P 2} has a pair of engagements formed in the split connecting body main body B _{1 on the upstream side.} The stop control claw 4 has entered and is locked. Therefore, the pair of locking restricting claws 4 formed on the split connecting body main body B _{1 on the upstream side are shared with the two types of drainage pipes P 1} and P _{2 having} different nominal diameters, so that the connecting body is connected. The configuration of C becomes simple. In FIGS. 11 to 13, d ₁ and d ₂ are inner diameters of two types of drainage pipes P ₁ and P _{2 having} different nominal diameters, and are used as a reference for the nominal diameter.

Further, the inner peripheral surface of the insertion hole 10 of the connector C is over its entire circumference, since a tapered surface shape of the drainage tube pressing surface 11, the drainage pipe P ₁ of two kinds of DN, P _{When 2} is inserted into the insertion hole 10 and connected, the drainage pipes P ₁ and P ₂ having different nominal diameters have their pipe axes Np ₁ and Np ₂ with respect to the axis Nc of the insertion hole 10. It is connected in a state of matching with the axis Nc without shifting.

Also, the example shown in Figure 14, the inner diameter d ₁₁ of the front side of the split connecting body B ₁ 'of the insertion hole 10''is smaller than the outer diameter D ₁ of the drainage pipe P ₁ of the large-diameter (D ₁ >'together), partitioned junction body B _1' d ₁₁ inner side inner diameter d ₁₂ of the insertion hole 10 'of, and is smaller than the outer diameter D ₂ of the small diameter of the drain pipe P ₂ (D _2> d ₁₂ ) At the connection between the straight inner peripheral surface 11'and the insertion hole 10' in the split connecting body B ₁ ', a contact stepped surface 15 with which the tip _{of the large-diameter drain pipe P 1 abuts is formed.} ing. Therefore, drainage pipe P ₁ having a large diameter, as shown in FIG. 14 (a), without being inserted the tip into the insertion hole 10 ', abuts against the abutment step surface 15, the drainage than only engaging regulating pawl 4 woven into the pipe P ₁ in a state in which the inner portion is compressed by a predetermined length in the axial direction of the tube, is connected to the divided connecting body B ₁ ', the small diameter of the drain pipe P ₂ , as shown in FIG. 14 (b), similarly to the above, the tip portion is inserted into only the insertion holes 10 'a predetermined length, the inner portion than the locking regulating pawl 4 in the drainage pipe P ₂ Is compressed by a predetermined length in the pipe axis direction, and its tip is pressed against the drainage pipe pressure contact surface 11'of the insertion hole 10'and connected to the split connection body B ₁ '.

The valve body V is roughly classified into a case where the valve body V is used by being connected to the tip _{of the drain pipe P 1} (P _{2) as shown in FIGS. 15 and 16, and a drainage body V as shown in FIG.} in the middle of the pipe P ₁ (P _2), there is a case to be used in a form that connects and if drainage pipe P ₁ (P _2), further, the former, as shown in FIG. 15, which is vertical run When connected to the tip (lower end) of the drain pipe P ₁ (P ₂ ) near the ground surface, and as shown in FIG. 16, horizontal piping along the ground surface of _{the drain pipe P 1} (P _2). It may be connected to the tip of the horizontal piping section P ₁ c (P _{2 c).} As shown in FIG. 2, a tape T is wound around the connection portion between the connection _{body C and the drainage pipes P 1} (P ₂ ) connected to the upstream side and the downstream side of the connection body C, respectively. This prevents drainage from leaking from the connection. In FIGS. 15 to 17, 51 is an outdoor unit of an air conditioner installed on the ground surface close to the outer wall 52 of the building, and 53 is a refrigerant pipe connected to the outdoor unit 51 (not shown). ) Is a protective duct that houses and protects.

Therefore, as shown in FIG. 5, the rotation operation cylinder 43 rotates the discharge port forming body G with respect to _{the split connecting body main body B 2} on the downstream side, and the position facing the _{split connecting body B 2} When a pair of positioning protrusions 46 provided at positions facing each other on the outer peripheral surface of the outlet closing cylindrical wall 42 of the discharge port forming body G are fitted into the one-to-one set of positioning fitting holes 28 provided in the above. A large number of drain drainage outflow openings 45 provided in the outlet closed cylindrical wall 42 and a large number of outlets E _{2 provided in the split connection main body B 2} on the downstream side all match to form a communication hole state. Become. In FIG. 5B, R is an outflow route through which the drain drainage W passing through the valve body V portion of the connecting body C flows out of the connecting body C through a _{large number of outflow ports E 2.} Is shown. Therefore, as shown in FIGS. 15 and 16, when connecting the connector C to the open end of the lower end of the vertical pipe has been drained pipe P ₁ (P _2), and the drainage pipe P ₁ of (P ₂₎ When connecting the connecting body C to the tip of the horizontal piping portion P ₁ c (P _{2 c), many outlets E 2} can be opened and the drain drainage W can flow out through the _{outlet E 2.} I will do it. In particular, as shown in FIG. 16, the valve body V of the connecting body C connected to the tip of the horizontal piping portion P ₁ c (P _{2 c) in the drain pipe P 1} (P _{2) and the discharge port forming body.} Since the drain drainage W that tends to stay between the bottom wall 44 of G and the drainage drainage W is _{discharged to the outside through one or a plurality of outlets E 2} arranged on the lower side, the drainage drainage W is inside the connecting body C. It does not stay. _{Moreover, a large number of outlets E 2} are formed in the axial direction at regular intervals along the circumferential direction in _{the split connection main body B 2} on the downstream side, and the _{drain pipe P 1} (P ₂₎ to be horizontally piped. ), Regardless of the connection position along the circumferential direction of the connection body C, a large number of outlets E formed in the axial direction at the lowest position of the horizontally arranged connection body C at regular intervals in the circumferential direction. _Since any of 2 is arranged, the drain drainage W is _{discharged to the outside through the outlet E 2} arranged at the lowest position inside the connection body C, so that the inside of the connection body C is as in the conventional case. The drain drainage W does not stay in the water.

Further, as shown in FIG. 6, _{a one-to-one set of positioning fitting holes 27 provided at opposite positions of the split connection body B 2} is provided with an outer peripheral surface of the outlet closing cylindrical wall 42 of the discharge port forming body G. When the pair of positioning protrusions 46 provided at opposite positions are fitted to each other, a large number of outlets E _{2 provided in the split connecting body B 2} on the downstream side are all blocked by the outlet blocking cylindrical wall 42. As a result, each outlet E ₂ is "closed" so that the drain drainage W in the middle of discharge does not flow out from _{each outlet E 2.} Therefore, as shown in FIG. 17, when each drainage pipe P ₁ (P ₂ ) to be vertically piped is connected by the connecting body C and the connecting body C is arranged in the middle of the piping, the above By closing each outlet E ₂ with the outlet closing cylindrical wall 42 as in the above, the drain drain W in the middle of draining is surrounded by the portion of the connecting body C incorporated in the middle _{of the drain pipe P 1} (P _2). no longer being scattered, drain waste water W that passes through the inside of the drainage pipe P ₁ (P ₂₎ is discharged from the lower end opening of the lowermost set to connect the drainage pipe P ₁ (P ₂₎ to the outside. In this way, even if the drain pipes P ₁ (P ₂ ) are connected to each other by the connecting body C and the connecting body C is _{arranged in the middle of the drain pipe P 1} (P ₂ ), the drainage function of the connecting body C is provided. And the outside air intrusion prevention function is not impaired. Incidentally, to place the connector C in the middle of the drainage pipe P ₁ (P ₂₎ is in relation to the length of the drainage pipe P ₁ (P _2), in the middle of the pipe direction, the drainage pipe P ₁ (P ₂ ) This is the case when there is no choice but to connect each other.

Further, the pair of positioning protrusions 46 formed at positions facing the outer peripheral surfaces of the outlet closing cylindrical wall 42 constituting the discharge port forming body G are paired with two sets of positioning fitting holes 27, It is fitted into any of 28 and can be visually recognized through the positioning fitting holes 27 and 28, and moreover, directly above the two sets of positioning fitting holes 27 and 28 on the outer peripheral surface of the _{split connecting body B 2} Since the letters "on the way" and "tip" are engraved on each, the opening and closing states of the _{outlet E 2 can be visually confirmed.} In addition, in FIG. 2, FIG. 3, FIG. 5 and FIG. 6, Q indicates the discharge direction of the drain drainage W inside the connecting body C.

Further, in the above-described embodiment, as the corrugated pipe to be connected by the connecting body according to the present invention, a pipe having an annular convex portion and an annular concave portion alternately formed along the pipe axis direction has been mentioned. As the corrugated pipe, a pipe having a structure in which a spiral (spiral) convex portion is continuously provided on the outer peripheral surface of the pipe body is also a target for connecting the connecting body according to the present invention.

The structure or connecting body of the connecting portion according to the present invention is not limited to the corrugated pipe used for drain drainage as a drain pipe, but is not limited to the corrugated pipe used as a conduit for inserting and protecting electric wires. It can also be used.

B: Connection body B ₁ : Split connection body (upstream side)
B ₂ : Split connection body (downstream side)
C: Connection body D ₁ , D ₂ : Outer diameter of discharge pipe (corrugated pipe) d ₁ , d ₂ : Inner diameter of discharge pipe (corrugated pipe) d ₁₁ : Maximum inner diameter of discharge pipe pressure contact surface d ₁₂ : Discharge pipe Minimum inner diameter of pressure contact surface E ₁ : Discharge port Nc: Axial center of insertion hole of connecting body Np ₁ , Np ₂ : Pipe axis _{of drain pipe (corrugated pipe) P 1} : Large diameter drain pipe (corrugated pipe)
P ₂ : Small diameter drainage pipe (wave pipe)
P ₁ a, P ₂ a: annular convex portion P ₁ b, P ₂ b: annular concave portion (outer surface concave portion)
Q: Drain drainage discharge direction V: Valve body 1: Drainage pipe connection (upstream connection)
3: Connection piece (upstream connection part)
4: Locking control claw (locking control part)
10: Insertion hole 11: Drainage pipe pressure contact surface 15: Contact step surface 31: Seated body 31e: Drainage passage port (drainage channel)
32: Valve plate support 33: Valve plate

Claims (5)

It is a tubular connection structure that can be connected by inserting the ends of two types of corrugated pipes with different nominal diameters.
The connection portion includes an insertion hole that allows insertion of a corrugated pipe having each nominal diameter, and an elastically deformable locking restricting portion that enters a concave portion on the outer surface of the corrugated pipe and regulates escape in the pipe axial direction. ,
On the inner peripheral surface of the insertion hole of the connection portion, which is deeper than the locking restricting portion, the front side has a larger diameter than the outer diameter of the large-diameter corrugated pipe, and the corrugated pipe having a smaller diameter toward the back. A tapered surface with a diameter smaller than the outer diameter is formed over the entire circumference.
The locking restricting portion enters into any of the outer surface recesses of each of the two types of corrugated pipes having different nominal diameters, and is shared by the two types of corrugated pipes.
When each corrugated tube having a different nominal diameter is inserted into the insertion hole of the connecting portion and reaches the tapered surface, the small diameter corrugated tube is the tip of the large diameter corrugated tube on the tapered surface. Each of the corrugated pipes inserted into the insertion hole, which is abutted at a portion further back than the abutment portion, has a portion located at the tip thereof behind the locking restricting portion. A structure of a connecting portion , wherein each corrugated pipe is prevented from coming off by the locking restricting portion in a state of being compressed and deformed in the pipe axis direction. It is a tubular connection structure that can be connected by inserting the ends of two types of corrugated pipes with different nominal diameters.
The connection portion includes an insertion hole that allows insertion of a corrugated pipe having each nominal diameter, and an elastically deformable locking restricting portion that enters a concave portion on the outer surface of the corrugated pipe and regulates escape in the pipe axial direction. ,
On the inner peripheral surface of the insertion hole of the connection portion, which is deeper than the locking restricting portion, the front side has a diameter smaller than the outer diameter of the large-diameter corrugated pipe and smaller than the outer diameter of the small-diameter corrugated pipe. A tapered surface having a large diameter and a diameter smaller than the outer diameter of the corrugated tube having a smaller diameter is formed over the entire circumference toward the back, and a large diameter wave is formed on the front side of the tapered surface in the insertion hole. A contact step surface is formed with which the tip of the attached pipe abuts.
The locking restricting portion enters into any of the outer surface recesses of each of the two types of corrugated pipes having different nominal diameters, and is shared by the two types of corrugated pipes.
In a state where the end of the large-diameter corrugated pipe is inserted into the insertion hole of the connection portion, the large-diameter corrugated pipe is in contact with the contact step surface by the locking restricting portion. In a state where the end portion of the corrugated pipe having a small diameter is inserted into the insertion hole of the connection portion, the tip portion thereof is brought into contact with the tapered surface and the locking restricting portion at the tip portion thereof. A structure of a connecting portion, characterized in that the locking restricting portion prevents the portion located deeper than the pipe from coming off in a state of being compressed and deformed in the pipe axis direction. A connector having a connection portion having the structure according to claim 1 or 2 . A connecting portion is formed on one end side to which a corrugated pipe as a drainage pipe for drainage of air-conditioning equipment is inserted and connected, and on the other end side, drainage drainage flowing from the corrugated pipe is discharged. It has a tubular connection body with an opening and
The connection portion has the structure according to claim 1 or 2.
Inside the main body of the connecting body, a valve body is provided which normally closes the discharge opening and opens when drain drainage flows in from one end side to form a drainage channel.
The valve body has a valve plate support portion arranged in the center of the tubular connection body body, a valve shaft portion supported by the valve plate support portion, and a valve shaft portion that projects outward from the valve shaft portion. The connection body according to claim 3, further comprising a flexible valve plate portion that is seated on an annular valve seat portion having a plate support portion inside. A corrugated tube connecting device comprising the connector according to claim 3 or 4 and two types of corrugated tubes having different nominal diameters.

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