JP2019158003A - Structure of connecting part, connecting body, connecting device of corrugated pipe and connecting structure of corrugated pipe - Google Patents

Abstract

To connect two kinds of corrugated pipes different in nominal diameters to each other by inserting them to a cylindrical connecting part without causing "backlash".SOLUTION: A cylindrical connecting part which can connect drain pipes Pcomposed of two kinds of corrugated pipes which are different from each other in nominal diameters by inserting end parts of the drain pipes comprises an elastically-deformable lock regulation claw 4 for permitting the insertion of the drain pipes Phaving the nominal diameters, intruding into annular recesses (outer face recesses) Pb of the drain pipe P, and regulating the come-off of the drain pipes from pipe axis directions. An internal peripheral face of an insertion hole 10 of the connecting part at a depth side rather than the lock regulation claw 4 is larger than an outside diameter of the small-diameter drain pipe at this side over the whole periphery, and a tapered face which becomes small in a diameter smaller than an outside diameter of the small-diameter drain pipe as processing toward the depth side is formed. A tip part of the drain pipe Ppressure-contacts with the tapered face, and a portion inside the lock regulation claw 4 of the drain pipe Pis compression-deformed to a pipe axis direction.SELECTED DRAWING: Figure 12

Description

The present invention relates to a structure of a connecting portion for connecting a corrugated pipe to a connecting body having a cylindrical connecting portion at an end of the corrugated pipe, a connecting body, a corrugated pipe connecting device, and a corrugated pipe. It relates to a connection structure.
In this specification, the “corrugated tube” is a resin-made product in which annular convex portions and annular concave portions are alternately provided on the outer peripheral surface of the tube, or spiral convex portions are continuously provided on the outer peripheral surface of the tube. The term “tube diameter” refers to the “inner diameter” or “approximate inner diameter” of the corrugated pipe used for specifying the size of the corrugated pipe.

  As a connection structure of a corrugated tube 3 which is a type of corrugated tube, as disclosed in Patent Document 1, a pair is provided on the inner peripheral surface of both ends in the axial direction of a cylindrical joint body (connector) 1. Are formed so as to face each other, and the corrugated pipes 3 are pushed into the inside from both ends of the joint body 1 so that the specific ridges 7 on the outer circumference thereof are connected to the inner circumference of the joint body 1. By disposing the corrugated tube 3 from the joint body 1 by locking the protrusion 7 and the locking protrusion 8 to each other by disposing them inside the locking protrusion 8 on the surface. The two corrugated tubes 3 are connected via the joint body 1.

  For this reason, the joint main body 1 can only connect one type of corrugated pipe 3 with a specific diameter, and in the connected state, the protrusions 8 of the joint main body 1 and the corrugated pipe 3 protrude. Since the article 7 is locked with a gap along the tube axis direction of the corrugated pipe 3, the corrugated pipe 3 cannot be connected to the joint body 1 in an immobile state. The connection state is unstable due to rattling, and the locking protrusion 8 of the joint body 1 and the protrusion 7 of the corrugated pipe 3 are merely locked in a state in which rattling occurs. Further, since water tightness is not ensured, there is a risk of water leakage at the connecting portion.

JP-A-8-145261

  It is an object of the present invention to insert and connect two types of corrugated pipes having different diameters to a cylindrical connection portion without “rattling”.

The invention of claim 1 for solving the above-described problem is a structure of a cylindrical connecting portion that can be connected by inserting end portions of two types of corrugated pipes having different diameters.
The connecting portion includes an elastically deformable locking restricting portion that allows insertion of the corrugated tube of each nominal diameter and enters the outer surface concave portion of the corrugated tube and restricts withdrawal in the tube axis direction,
The inner peripheral surface at the back of the connection hole in the insertion hole of the connection portion is larger than the outer diameter of the small-diameter corrugated tube over the entire circumference, and the smaller-diameter corrugated tube is directed toward the rear. It is characterized by being formed on a tapered surface having a smaller diameter than the outer diameter.

  According to the first aspect of the present invention, the inner peripheral surface at the back of the engagement restricting portion in the insertion hole of the connection portion is larger than the outer diameter of the corrugated tube having a small diameter on the front side over the entire circumference, and is formed in the back. Since it is formed on a tapered surface that becomes smaller than the outer diameter of the smaller diameter corrugated pipe as it goes, if the front side is larger than the outer diameter of the large diameter corrugated pipe, two types with different nominal diameters Each of the corrugated pipes has different insertion lengths with respect to the insertion hole, and in any state where the distal end portion is in pressure contact with the tapered surface, the locking restriction portion enters and locks into a specific outer surface recess. Two types of corrugated tubes with different diameters can be connected to the same connection portion. In other words, when the corrugated tube is inserted into the insertion hole of the connection portion, the corrugated tube is inserted into the insertion hole by elastically deforming the locking restricting portion outward by the outer surface convex portion. If the corrugated tube is inserted until the maximum insertion length is secured without the inner portion of the corrugated restricting portion being compressed and deformed in the tube axis direction, the corrugated tube is further pushed inward. When the tip of the attached tube is in pressure contact with the tapered surface, the inner part of the tube is compressed and deformed by a predetermined length in the tube axis direction, and at the same time, it is locked with a specific outer surface recess of the corrugated tube. In a state where the portion is in pressure contact with the gap axis along the tube axis direction of the corrugated tube, the locking restricting portion is restored to the original shape and enters the outer surface concave portion of the corrugated tube and is locked. The corrugated tube with a small nominal diameter is pressed against the small diameter portion of the tapered insertion hole with respect to the corrugated tube with a large nominal diameter, that is, the insertion length of the corrugated tube with respect to the insertion hole of the connecting portion. Except for the long point, the two types of corrugated pipes are connected to the connecting portion in the same state.

  On the other hand, when the front side of the insertion hole is smaller than the outer diameter of the large-diameter corrugated tube and larger than the outer diameter of the small-diameter corrugated tube, the tip surface of the large-diameter corrugated tube or a surface close thereto Is engaged with the outer surface concave portion of the large-diameter corrugated tube in a state where the large-diameter corrugated tube is compressed by a predetermined length in the tube axis direction in contact with the abutting step surface on the front side of the insertion hole. The stop regulating portion enters, and the corrugated tube is connected to the connection portion. The small-diameter corrugated tube is compressed by a predetermined length in the tube axis direction, and its distal end is predetermined in the insertion hole. It is inserted by a length, and its distal end is pressed and connected to the inner peripheral surface of the insertion hole.

  Therefore, according to the first aspect of the present invention, when the front side of the insertion hole is larger than the outer diameter of the large-diameter corrugated tube, the connection portion is locked in the connected state of the corrugated tube to the connection portion. The portion is in pressure contact with the outer surface recess of the corrugated tube without any gap along the tube axis direction, and the portion of the corrugated tube corresponding to the outer diameter of the corrugated tube in the insertion hole of the connecting portion is Since the inner portion of the corrugated tube is compressed in the tube axis direction and connected to the tip of the corrugated tube, the two types of corrugated tubes are connected to the insertion hole of the connecting portion. With different insertion lengths of each corrugated tube, two types of corrugated tubes having different call diameters can be connected to the same connection portion without “rattling”. In addition, since the tip of the corrugated tube is in pressure contact with the portion corresponding to the outer diameter of the corrugated tube in the insertion hole of the connection portion, water tightness between the inner peripheral surface of the insertion hole and the drain tube is ensured. There is no water leakage at the connection between the connection body and the corrugated pipe. In addition, since the tapered surface is formed on the entire circumference of the insertion hole of the connecting portion, when two types of corrugated pipes having different nominal diameters are inserted into the insertion holes and connected, The pipes are connected in a state in which the pipe axis is aligned with the axis without being displaced with respect to the axis of the insertion hole of the connection portion.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the insertion hole whose inner peripheral surface is a tapered surface has an inner diameter larger than that of the corrugated tube having a large diameter on the front side.

  According to the invention of claim 2, since the inner diameter of the front side of the insertion hole of the connection portion is larger than that of the large diameter corrugated tube, the corrugated tube is inserted into the insertion hole of the connection portion. In addition, both of the two types of corrugated pipes can be smoothly inserted without interfering with the peripheral edge of the inlet opening on the front side of the insertion hole. In the invention of claim 1, the front side of the insertion hole is corrugated with a large diameter. The effect in the case of being larger than the outer diameter of the tube is exhibited.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the locking restricting portion enters either of the outer surface recesses of each of the two types of corrugated pipes having different nominal diameters. It is characterized by being shared for.

  In general, the positions of the outer surface recesses of the two types of corrugated pipes having different nominal diameters with respect to the axial center of the insertion hole of the connection portion are different. According to the invention of claim 3, the locking restricting portion provided in the connecting portion is shaped so as to enter and be locked into any of the outer surface concave portions of the two types of corrugated pipes having different diameters. Since it is designed and can be shared with two types of corrugated pipes having different call diameters, the configuration of the connecting portion having the locking restricting portion is simplified.

Invention of Claim 4 is a connection body provided with the cylindrical connection part which has an insertion hole in which a corrugated tube is inserted from an end,
The connecting portion is provided with a restricting portion that allows the corrugated tube to move in the insertion direction and enters the outer surface concave portion of the corrugated tube to prevent the corrugated tube from coming out due to the movement in the anti-insertion direction.
A taper surface that becomes deeper than the maximum outer diameter of the corrugated tube in the insertion region into which the corrugated tube is inserted further into the insertion region into which the corrugated tube is inserted. It is characterized by being formed.

  Since the invention of claim 4 is grasped from the surface of the “connection body” provided with the “structure of the connection portion” according to the invention of claim 1, the substantial operational effect is the same as that of the invention of claim 1. It is equivalent.

In the invention of claim 5, a connecting portion to which a corrugated pipe as a drain pipe for drain drainage of air conditioning equipment is inserted and connected is formed at one end side, and the inflow from the corrugated pipe is introduced into the other end side. Provided with a cylindrical connecting body main body formed with a discharge opening for discharging drained drainage,
The connection portion has a structure according to any one of claims 1 to 3,
Inside the connection body, a valve body that normally closes the discharge opening and opens to form a drainage channel when drainage drainage flows from the one end side is provided,
The valve body includes a valve plate support portion disposed at the center of the tubular connecting body main body, a valve shaft portion supported by the valve plate support portion, and projects outward from the valve shaft portion. It is characterized by comprising a flexible valve plate portion seated on an annular valve seat portion with the plate support portion inside.

  According to the invention of claim 5, since the connection portion having the structure according to any one of claims 1 to 3 is provided at one end of the connection body, the connection body according to any one of claims 1 to 3 is provided. In addition to the effects of the invention, the valve that normally closes the discharge opening inside the connecting body and opens the drain when drainage flows from the one end side to form a drainage channel. In addition, since the valve body includes a valve plate support portion, a valve shaft portion, and a valve plate portion, the following specific effects are exhibited.

  That is, when the connecting body according to claim 5 is connected to one end of two types of corrugated pipes having different diameters, the corrugated pipe is externally blocked by a normally closed valve body. In addition to preventing outside air, insects, etc. from entering the inside of the valve, the drainage flowing inside the corrugated pipe is flexible due to its fluid force and is seated on the valve plate support. The body is in a state where the central valve shaft portion is integrated with the valve plate support portion, and the entire outer peripheral portion thereof is separated from the valve plate support portion to form a drainage channel. The waste water is discharged outside the connection body. For this reason, by connecting the connection body according to the invention of claim 5 to the tip of the drain drain pipe of air conditioning equipment such as an air conditioner, from the indoor unit in a state that prevents the outside air from entering the indoor side. The drainage generated can be drained outdoors.

A sixth aspect of the present invention is a corrugated tube connection device comprising a connection body having the connection portion according to any one of the first to third aspects and two types of corrugated tubes having different nominal diameters. There,
The insertion hole of the connecting portion has a front side where the end portion of the corrugated tube is inserted larger than the outer diameter of the small-diameter corrugated tube, and becomes smaller than the outer diameter of the small-diameter corrugated tube toward the back. It is characterized by being formed in such a tapered surface.

  Since the invention of claim 6 expresses the invention of any of claims 1 to 3 from the aspect of the “corrugated tube connection device”, it is described in any of claims 1 to 3. The same effect as that of the present invention is achieved.

The invention of claim 7 is a structure for connecting the corrugated pipe by inserting the end of the corrugated pipe into the insertion hole formed in the cylindrical connecting portion at the end of the connection body,
The connecting portion is provided with a restricting portion that allows movement of the corrugated tube in the insertion direction, enters the outer surface recess of the corrugated tube, and restricts withdrawal due to movement in the anti-insertion direction.
The corrugated tube whose end is inserted into the insertion hole of the connector is prevented from being pulled out by the restricting portion, and the portion behind the restricting portion of the corrugated tube is compressed in the tube axis direction. The tip portion of the corrugated tube is deformed and is press-contacted with the insertion hole having a tapered surface whose inner peripheral surface has a small diameter toward the back.

  According to the seventh aspect of the invention, as an effect of the first aspect of the invention, in the connected state of the corrugated pipe, the inner portion of the corrugated pipe from the locking restricting portion is compressed and deformed in the tube axis direction. Since the invention is defined as “invention specific matter”, the substantial operational effect is equivalent to that of the invention of claim 1.

  According to the present invention, in the connected state of the corrugated tube to the connecting portion, the locking restricting portion of the connecting portion is in pressure contact with the outer surface recess of the corrugated tube without any gap along the tube axis direction, When the tip of the corrugated tube is in pressure contact with the inner diameter portion of the insertion hole corresponding to the outer diameter of the corrugated tube, the inner portion of the corrugated tube from the locking restricting portion is in the tube axis direction. Since the two types of corrugated pipes are compressed and connected, the corrugated pipes have different insertion lengths with respect to the same connecting section, with different insertion lengths of the corrugated pipes in the insertion holes of the connecting section. Tubes can be connected without “rattling”. In addition, since the tapered surface is formed on the entire circumference of the insertion hole of the connecting portion, when two types of corrugated pipes having different nominal diameters are inserted into the insertion holes and connected, The pipes are connected in a state in which the pipe axis is aligned with the axis without being displaced with respect to the axis of the insertion hole of the connection portion.

It is a disassembled perspective view of the connection body main body B, the valve body V, and the discharge port formation body G of the division structure which comprises the connection body C which concerns on this invention. 3 is a longitudinal sectional view of a connection body C. FIG. 2 is a partially broken perspective view of a connection body C. FIG. FIG. 3 is a partially broken perspective view of a downstream divided connector body B ₂ and a valve body V and a discharge port forming body G incorporated in the divided connector body B ₂ . Partitioned junction body B ₂ outlet E ₂ formed is a view showing a state of being opened, (a), (b) are each perspective views and longitudinal sectional view, (c), the it is X ₁ -X ₁ line cross-sectional view of (b). Partitioned junction body B ₂ outlet E ₂ formed is a view showing a state of being closed by the discharge port formation member G, (a), (b ) are each perspective views and longitudinal sectional view , (c) is a X ₂ -X ₂ line cross-sectional view of (b). FIG. 6 is a perspective view showing a state in which a coin 48 is inserted into the slit groove 47 of the discharge port forming body G and the discharge port forming body G is rotated. A diagram for explaining that the valve body V is incorporated between the partitioned junction body _{B 1, B 2, (a} ), (b) is a perspective view immediately after each exploded perspective view and a assembled . (A) is a front view immediately after the valve body V is assembled between the divided connector bodies B ₁ and B ₂ , and (b) and (c) are respectively Y ₁ -Y of (a). it is a cross-sectional view of _a 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). 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, a longitudinal sectional view of the drainage pipe P ₁ is inserted into the insertion hole 10. (A), (b), (c) , the end of the drainage pipe P ₁ into the insertion hole 10 of the split connecting body B ₁ of the upstream side is inserted, longitudinal sectional view showing a state before they are connected It is. (A), (b) is a split connecting member insertion hole 10 of the body B ₁ of the upstream end portion of the drainage pipe P _1, P ₂ respectively are inserted, it is vertical sectional view of a connected state . (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 It is a longitudinal cross-sectional view of the state where the end portion of the drain pipe P ₂ is inserted and connected to the insertion hole 10 ′ of ₁ ′. (A), (b) is a perspective view of a state in which the connection body C is connected to the tip of the drain pipe P ₁ (P ₂ ) that is vertically connected, and a connection body C showing the flow of the drainage water W. It is a longitudinal cross-sectional view. (A), (b) is a perspective view of each state connecting member C to the distal end of the horizontal pipe portion P ₁ c (P ₂ c) is connected in the drainage pipe P ₁ (P _2), and drain waste water W It is a longitudinal cross-sectional view of the connection body C which shows the flow of this. (A), (b) is the perspective view of the state in which the connection body C is connected in the middle of the drain pipe P ₁ (P ₂ ) vertically connected, and the longitudinal section of the connection body C showing the flow of the drain water W FIG.

Hereinafter, the present invention will be described in more detail with reference to examples. 1 to 4, a connection body C according to the present invention includes a corrugated pipe that is connected to a drain pan (none of which is shown) of an indoor unit of an air conditioner such as an air conditioner and discharges drain drainage to the outdoors. 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). ₁ and B ₂ , when the cylindrical connector body B and the split connector bodies B ₁ and B ₂ are assembled together, they are incorporated between the split connector bodies B ₁ and B ₂ , The valve body V that prevents the outside air from entering the inside and the downstream divided connector body B ₂ are fitted inside to form the discharge port E ₁ , and the downstream divided connector body B ₂ has a circumferential direction. A large number of wide slits formed along the axial direction of the divided connector body B ₂ at equal intervals along And a discharge port forming body G that closes the outflow port E ₂ . Incidentally, the partitioned junction body B _1, B _2, the valve body V and a discharge port formation member G are both made of resin.

Two kinds of drainage pipes P ₁ and P ₂ having different diameters are provided with annular convex portions P ₁ a (P ₂ a) and annular concave portions P ₁ b (P ₂ b) alternately along the pipe axis direction. Therefore, either _one of the two types of drain pipes P ₁ and P ₂ is included in the drain pipe connecting portion 1 to be described later of the upstream divided connecting body B _1. Selected and connected. The resin drain pipes P ₁ and P ₂ are compressed and deformed in the pipe axis direction by the compressive force along the pipe axis direction and the annular recess P ₁ b (P ₂ b) is compressed and deformed. The length along is slightly shortened. The diameters of the drain pipes P ₁ and P ₂ are “16” and “14”, respectively.

As shown in FIG. 1 to FIG. 3 and FIG. 8, the upstream divided connector body B ₁ is substantially cylindrical, and the upstream portion of the predetermined length is formed in a cylindrical shape, and the drainage A drainage pipe connecting portion 1 for inserting and connecting pipes P ₁ (P ₂ ), and a pair of elastically deformable rectangular connecting pieces 3 are formed oppositely between a pair of axial slits 2. On the inner surface on the upstream side of each connection piece 3, there is a locking restriction claw 4 that is locked in the inserted state in the annular recess P ₁ b (P ₂ b) of the drainage pipe P ₁ (P ₂ ) having the corrugated structure. It protrudes in the direction. Of the drainage pipe connecting portion 1 of the partitioned junction body B _1, wherein the connecting pieces 3 of rectangular shape, in order to facilitate elastic deformation, and is formed to be thinner than other portions of the drainage pipe connecting portion 1 . The insertion hole 10 of the substantially cylindrical divided connecting body B ₁ is a portion to which the end of the drain pipe P ₁ (P ₂ ) is inserted and connected, and from the locking regulation claw 4 in the insertion hole 10. The innermost part is a drainage pipe pressure contact surface 11 formed on a tapered surface such that the inner peripheral surface decreases toward the inner part over the entire circumference. 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 inner fitting assembly 5 having an annular convex portion P ₁ a (P ₂ a) at the end of the corrugated drainage pipe P ₁ (P ₂ ) with respect to the drainage pipe pressure contact surface 11. It is connected to the drainage pipe press-connecting connection part 6 to be press-contacted, and is formed in a step shape by a sudden decrease in the outer diameter. The connecting part between the drainage pipe press-connecting connection part 6 and the internally fitting assembly part 5 has a stepped surface. 13 is formed. A pair of elastically deformable assembly pieces 8 are formed on the inner fitting assembly 5 between a pair of axial slits 7 so as to face each other. the locking projection 9 is locked mating engagement with each Hamagogakari stop hole 23 formed to face the partitioned junction body B ₂ on the downstream side is formed. A portion of the outer peripheral surface of the drain pipe press-connecting connection portion 6 facing the inner fitting assembly 5 and the portion where the assembly pieces 8 are disposed are divided into upstream and downstream divided connector bodies. When B ₁ and B ₂ are assembled together, an arrangement position display mark 12 for displaying the arrangement position of each assembly piece 8 is formed. Each assembly piece 8 formed on the inner fitting assembly 5 is formed thin with respect to the remaining portion of the inner fitting assembly 5 in order to facilitate elastic deformation. The inner peripheral surface of the drain pipe press-connecting connection portion 6 of the divided connector body B ₁ is brought into pressure contact with the annular convex portion P ₁ a (P ₂ a) at the end of the corrugated drainage pipe P ₁ (P ₂ ). The drainage pipe pressure contact surface 11 is a drainage pipe pressure contact surface 11 for compressing and deforming a predetermined length portion along the pipe axis direction from the end of the drainage pipe P ₁ (P ₂ ). The taper surface is formed such that the inner diameter gradually decreases from the drain pipe connecting portion 1 toward the inner fitting assembly 5 side. The drain pipe pressure contact surface 11 and the inner peripheral surface of the inner fitting assembly 5 are connected in steps.

As shown in FIGS. 1 to 6, the divided connector body B ₂ on the downstream side has a cylindrical shape as a whole, and a portion having a predetermined length from the upper end surface 21 is fitted into the divided connector 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 The fitting locking holes 23 for fitting and locking the locking projections 9 of the pair of assembled pieces 8 formed are opposed to each other. Each fitting locking hole 23 is formed along the circumferential direction of the divided connector body B ₂ in correspondence with each locking projection 9 being formed along the circumferential direction of the divided connector body B _1. 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 An arrangement position display mark 20 that is arranged immediately below the arrangement position display mark 12 of the connection 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 the respective locking projections 9 formed on the outer peripheral surface, a tapered assembly surface 38 is formed which is gradually thinned from each fitting locking hole 23 toward the upper end surface 21. (See FIGS. 1 and 2). Partitioned junction body in a predetermined length of a portion from the upper end surface 21 of the inner circumferential surface of the B _2, a total of four of each fitting projection 31d formed on the outer peripheral portion of the seating member 31 described later which constitutes a valve body V 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 to the back side from each fitting locking hole 23.

Also, the central portion in the axial direction of the inner peripheral surface of the split connecting body B ₂ is abutting ring body for abutting the end face of the outlet obstruction cylindrical wall 42 of the inner fitting evacuation port formation member G from the lower end side 25 is formed, the portion immediately before the contact ring body 25 from the lower end surface 29 of the split connecting body B ₂ is not a outlet forming portion 26, to the outlet forming portion 26 has a plurality of flow The outlet E ₂ is formed in the axial direction in a state where the outlet E ₂ is opened at the lower end surface 29 at a constant interval along the circumferential direction. The discharge port forming body G has a shape in which two short cylindrical bodies having different outer diameters are integrated, and the discharge port forming body G is fitted in the outflow port forming portion 26, and the outflow port forming portion is formed. 26, a positioning projection 46 formed at a position opposed to 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 a portion close to the contact ring body 25 in Two sets of positioning fitting holes 27 and 28 are arranged in the circumferential direction to form a one-on-one set for changing and fixing the discharge port forming body G to different positions along the circumferential direction with respect to the outlet forming portion 26. It is formed at a predetermined interval. The positioning fitting holes 27 and 28 of each set of one-to-one set are formed to face each other at a position where the phase in the circumferential direction differs by 180 °, and each set formed at a predetermined interval along the circumferential direction. one of the positioning fitting holes 27, 28 have been formed between the outlet E ₂ adjacent the wall thickness between the one of the positioning fitting holes 27, 28 of each set in the outlet forming portion 26, By passing the positioning protrusion 46 and forming a step on the inner peripheral surface in order to enable rotation of the discharge port forming body G with respect to the divided connector body B ₂ (outlet forming portion 26), It is thinner than other parts [see FIG. 5 (c) and FIG. 6 (c)].

The valve body V incorporated between the pair of split connection body bodies B ₁ and B ₂ is arranged in close contact with the ring-shaped seat body 31 and the downstream surface of the seat body 31, so that the central valve The valve plate 33 is formed of a flexible circular thin plate that is integrally attached to the seat body 31 via a plate support portion 32. The seating body 31 has a plurality of arm portions 31b that are integrally arranged in the diametrical direction inside an outer ring portion 31a, and a fitting hole into which the valve plate support portion 32 is fitted at a central portion where each arm portion 31b intersects. 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 Is provided. Further, the opening formed between each of the plurality of arm portions 31b functions as a drainage passage port 31e that constitutes a drainage channel for the drainage drainage W. The valve plate support portion 32 is fitted into the insertion hole 31 c of the seating body 31 from the downstream side in a press-fitted state, and the valve plate 33 is disposed in close contact with the seating surface on the downstream side of the seating body 31.

For this reason, the flexible thin plate-like 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 conditioning equipment, 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, and 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, the fitting protrusions 31 d of the seat body 31 constituting the valve body V are fitted into the plurality of protrusion fitting grooves 24 of the split connection body main body B _2. Te, by inserting the seating member 31 to form end of each projection fitting groove 24, the seat body 31 is inserted into the slightly rear side than the fitting engaging hole 23 in the divided connection body B ₂ Be placed. Thereafter, as shown in FIG. 9, two opposing two selected from a total of four protrusion fitting grooves 24 formed in the outer fitting assembly 22 of the downstream divided connector body B ₂ . 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. Thereafter, when the upstream divided connection body B ₁ is rotated by a predetermined angle with respect to the downstream divided connection body B ₂ , the locking protrusions of the respective assembly pieces 8 of the divided connection body B ₁ are rotated. The portion 9 is fitted in the fitting locking hole 23 of the divided connector body B ₂ , and the divided connector bodies B ₁ and B ₂ are assembled together, 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 of assemblies are mounted on the facing portion of the ring portion 31 a of the seat body 31 inserted to the far side end with respect to the downstream divided connector body B ₂ . When the front end surface of the piece 8 abuts, the valve body V is incorporated in the assembled portion of the pair of split connection body bodies B ₁ and B _{2 in} a non-moving state. For this reason, when a malfunction occurs in the valve body V during the use of the connection body C, the pair of split connection body bodies B ₁ and B ₂ can be separated and replaced with a new valve body V.

Incidentally, the assembling of the divided connection body B _1, B ₂ is also possible by the following method. That is, a pair of tapered assembly surfaces 38 formed opposite to the inner surface of the outer fitting assembly 22 of the downstream divided connector body B ₂ are paired with the pair of upstream divided connector bodies B ₁ . When the respective locking projections 9 formed on the assembly piece 8 are 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 projection 9 of each assembly piece 8 is fitted into each fitting locking hole 23 of the divided connector body B ₂ on the downstream side, whereby each assembly piece 8. Is restored to its original shape, and the divided connector bodies B ₁ and B ₂ are assembled together.

  As shown in FIG. 15 (b), when the drainage water W flows from the upstream side toward the downstream side, the valve body V is separated from the seat body 31. By being deformed, the drainage water 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. To do.

Further, the discharge port forming body G fitted from the downstream side of the divided connection body B ₂ is provided with a discharge port E _{1 for the} drainage water W as shown in FIGS. 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 cylindrical bodies having greatly different outer diameters are integrated by sharing a bottom wall, and the bottomed short cylindrical body having a large outer diameter is a divided connecting body main body. 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 rotating operation cylinder 43 for facilitating the operation of rotating the outlet closing cylindrical wall 42 fitted to the main body B ₂ to change the fixing position. It also has a function as a downstream connection part for connecting the downstream drain pipe P ₁ (P ₂ ) to C.

In other words, 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 in the divided connecting body B ₂ on the downstream side. The same number of wide slit-shaped drain discharge outlet openings 45 as the number of outlets E ₂ are formed on the opening end side. In the portion where the phase on the outer peripheral surface of the outlet blocking cylindrical wall 42 differs by 180 °, any one of the positioning fitting holes 27 and 28 formed as a pair with the downstream split connector body B ₂ is formed. Positioning protrusions 46 that are fitted to either of them are formed. The rotation operation cylinder 43 is formed with a split groove 47 in the axial direction at the opposing position, so that the cylindrical body is divided into two parts. For example, a coin 48 is inserted into each split groove 47. Thus, the discharge port forming body G fitted into the split connector body B ₂ is fitted in a state in which the pair of positioning projections 46 are fitted into any pair of fitting holes 27 (28). The fixed position can be easily changed by rotating with a large rotational force (see FIG. 7). The outer periphery of the end portion in the axial direction of the rotating operation tube 43, holding flange 43a for engaging the drainage pipe P ₁ with the connected wave (P ₂₎ is formed. 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 drainage pipe pressure contact surface 11 is larger than the outer diameter D ₁ of the drainage pipe P _{1 having} a larger nominal diameter (D ₁ <d ₁₁ ). The smallest inner diameter d ₁₂ on the far side is smaller than the outer diameter D ₂ of the drain pipe P _{2 having} a smaller nominal diameter (D ₂ > d ₁₂ ). For this reason, the tip ends of the drain pipes P ₁ and P _{2 having} different nominal diameters inserted into the insertion hole 10 of the divided connector body B ₁ are both in contact with the middle part of the drain pipe pressure contact surface 11 (pressure contact). However, the insertion length of the drain pipe P _{1 having} a large diameter is shorter than the insertion length of the drain pipe P _{2 having} a small diameter. In addition, the straight inner peripheral surface 14 having the same inner diameter d ₁₁ having a short length is formed at the inlet of the drain pipe pressure contact surface 11, so that two types of drain pipes P ₁ and P _{2 having} different nominal diameters, The tip of the drain pipe P _{1 having} a large nominal diameter can be inserted without interfering with the inlet portion of the drain pipe pressure contact surface 11.

For this reason, in order to connect the drain pipe P ₁ having a large nominal diameter to the connection body C, as shown in FIG. 12, the upstream divided connection body B ₁ by passing through the annular projection P ₁ a. A pair of connecting pieces 3 formed opposite to each other is elastically deformed outward by the annular convex portion P ₁ a, and the action of restoring the original shape at the portion of the annular concave portion P ₁ b is repeated, so that the drain pipe It is part of the inward from the pair of connecting pieces 3 (deeper) in P ₁ is not compressed and deformed in the axial direction of the tube, in a state of being inserted to ensure maximum insertion length [FIG 12 (a)], the further When the drain pipe P ₁ is pushed inward, the tip of the drain pipe P ₁ is in pressure contact with 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 inner portion of the drain pipe P ₁ than the locking restriction claw 4 is in the portion of the annular recess P ₁ b. While being compressed and deformed by a predetermined length in the pipe axis direction, the specific annular recess P ₁ b of the drain pipe P ₁ and the locking regulating claw 4 are pressed into contact with each other without any gap along the pipe axis direction of the drain pipe P _1. In this state, the pair of locking regulation claws 4 are restored to the original shape, and enter the annular recess P ₁ b of the drain pipe P _{1 and} are locked.

As a result, there is no gap in the tube axis direction between the connecting body C and the drain pipe P ₁ , so that the drain pipe P ₁ is firmly connected to the connecting body C without “rattling” and drainage. Since the tip end portion of the pipe P ₁ is in pressure contact with the drain pipe pressure contact surface 11 of the connection body C, water leakage does not occur at the connection portion between the connection body C and the drain pipe P ₁ .

Further, in the case of the drain pipe P _{2 having} a small nominal diameter, as shown in FIG. 13, the drain pipe P ₂ is pressed against a portion having a small inner diameter on the drain pipe press-contact surface 11 as compared with the drain pipe P ₁ having a large nominal diameter. Thus, only the insertion length of the connection 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 upstream divided connection body B _1. The stop restricting claw 4 enters and is locked. For this reason, the pair of locking restricting claws 4 formed in the upstream divided connector body B ₁ is shared by the two types of drainage pipes P ₁ and P _{2 having} different nominal diameters. The configuration of C becomes simple. 11 to 13, d ₁ and d ₂ are the inner diameters of two types of drain pipes P ₁ and P _{2 having} different nominal diameters, and are the reference of the nominal diameter.

Further, since the inner peripheral surface of the insertion hole 10 of the connection body C is a tapered drainage pipe pressure contact surface 11 over the entire circumference, two types of drainage pipes P ₁ and P 2 having different nominal diameters are used. ₂ is inserted into the insertion hole 10 and connected, the drain pipes P ₁ and P ₂ having different nominal diameters have pipe axial centers Np ₁ and Np ₂ with respect to the axial center Nc of the insertion hole 10. The connection is made in a state that matches the axis Nc.

Further, in the example shown in FIG. 14, the inner diameter d ₁₁ ′ on the near side of the insertion hole 10 ′ of the divided connector body B ₁ ′ is smaller than the outer diameter D ₁ of the large drainage pipe P ₁ (D ₁ > D ₁₁ ′) and the inner diameter d ₁₂ on the back side of the insertion hole 10 ′ of the split connector body B ₁ ′ is smaller than the outer diameter D ₂ of the small-diameter drain pipe P ₂ (D ₂ > d ₁₂ ) The contact step surface 15 with which the tip of the large-diameter drain pipe P ₁ abuts is formed at the connection portion between the straight inner peripheral surface 11 ′ and the insertion hole 10 ′ in the split connector body B ₁ ′. 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 The pipe P ₁ is connected to the split connector body B ₁ ′ in a state where the inner portion of the pipe P ₁ is compressed by a predetermined length in the pipe axis direction, and has a small-diameter 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 to a predetermined length in the tube axis direction, and its tip is brought into pressure contact with the drain pipe pressure contact surface 11 ′ of the insertion hole 10 ′ and connected to the divided connector body B ₁ ′.

The valve body V is roughly classified as shown in FIGS. 15 and 16 when used by connecting to the tip of the drain pipe P ₁ (P ₂ ), and 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 front end (lower end) of the drain pipe P ₁ (P ₂ ) close to the ground surface, and as shown in FIG. 16, horizontal piping along the ground surface of the drain pipe P ₁ (P ₂ ) In some cases, it is connected to the tip of the horizontal pipe portion P ₁ c (P ₂ c). As shown in FIG. 2, a tape T is wound around each connection portion between the connection body C and the drain pipe 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. 15 to 17, 51 is an outdoor unit of an air conditioner installed on the ground surface near the outer wall 52 of the building, and 53 is a refrigerant pipe (not shown) connected to the outdoor unit 51. ).

Therefore, as shown in FIG. 5, the discharge port forming body G is rotated with respect to the downstream divided connector body B ₂ by the rotation operation cylinder 43, and the opposing position of the divided connector body B ₂ is detected. When a pair of positioning projections 46 provided at positions opposed to the outer peripheral surface of the outlet closing cylindrical wall 42 of the discharge port forming body G are fitted into the pair of positioning fitting holes 28 provided in A large number of drain discharge outlets 45 provided in the outlet closed cylindrical wall 42 and a large number of outlets E ₂ provided in the downstream divided connector body B ₂ are all matched to form a communicating hole. Become. Incidentally, in FIG. 5 (b), R is the outflow path through the plurality of outlet E _2, drain waste water W that has passed through the portion of the valve body V of connector C flows out to the outside of the connector C Indicates. For this reason, as shown in FIGS. 15 and 16, when connecting body C is connected to the open end of the lower end of drained pipe P ₁ (P ₂ ) that is vertically piped, and for drain pipe P ₁ (P ₂ ) When connecting the connection body C to the tip of the horizontal piping part P ₁ c (P ₂ c), the drainage water W can flow out through the outlets E ₂ by opening many outlets E _2. Keep it like that. In particular, as shown in FIG. 16, the valve body V of the connection body C connected to the tip of the horizontal pipe portion P ₁ c (P ₂ c) in the drain pipe P ₁ (P ₂ ), and the discharge port forming body Since the drainage waste water W that tends to stay between the bottom wall 44 of G flows out to the outside through one or more outlets E ₂ arranged on the lower side, the drainage waste water W is formed inside the connection body C. It will not stay. Moreover, the partitioned junction body B ₂ on the downstream side, along the circumferential direction have a number of outlet E ₂ is formed in the axial direction at regular intervals, the drainage pipe P ₁ (P ₂ being horizontally piping ) Regardless of the connection position along the circumferential direction of the connection body C to the lowest position of the connection body C arranged horizontally, a large number of outlets E formed in the axial direction at regular intervals in the circumferential direction. ₂ is disposed, the drainage water W is discharged to the outside through the outlet E ₂ disposed at the lowest position inside the connection body C. In FIG. 3, the drainage water W does not stay.

Further, as shown in FIG. 6, the outer peripheral surface of the outlet closing cylindrical wall 42 of the discharge port forming body G is inserted into the pair of positioning fitting holes 27 provided at the opposed positions of the divided connector body B ₂ . When the pair of positioning protrusions 46 provided at the opposed positions are fitted, the large number of outlets E ₂ provided in the downstream divided connector body B ₂ are all closed by the outlet closing cylindrical wall 42. Thus, each outlet E ₂ is “closed”, and the drainage water W that is being discharged is not discharged from each outlet E ₂ . For this reason, as shown in FIG. 17, when each drain pipe P ₁ (P ₂ ) that is vertically piped is connected by the connection body C, the connection body C is arranged in the middle of the pipe. In this way, by closing each outlet E ₂ with the outlet blocking cylindrical wall 42, drainage water W in the middle of drainage from the part of the connecting body C incorporated in the middle of the drainage 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 connection body C and the connection body C is arranged in the middle of the drain pipe P ₁ (P ₂ ), the drainage function of the connection 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 a case where you have to connect each other.

In addition, the pair of positioning projections 46 formed at positions opposed to the outer peripheral surface of the outlet blocking cylindrical wall 42 constituting the discharge port forming body G are two pairs of positioning fitting holes 27, 28 is fitted to one of a visible through the positioning fitting holes 27 and 28, yet immediately above the partitioned junction body B ₂ of two sets of positioning the outer peripheral surface fitting hole 27, 28, Since the letters “middle” and “tip” are engraved, the states of the opening and closing of the outlet E ₂ can be visually confirmed. 2, 3, 5, and 6, Q indicates the drainage direction of the drainage water W inside the connection body C.

  In the above embodiment, the corrugated pipe to be connected by the connecting body according to the present invention has a configuration in which the annular convex portions and the annular concave portions are alternately formed along the tube axis direction. As the corrugated tube, a tube having a structure in which spiral (spiral) convex portions are continuously provided on the outer peripheral surface of the tube body is also an object of connection of the connection body according to the present invention.

  In addition, the structure or connection body of the connection part which concerns on this invention is not limited to the corrugated pipe used for drain drainage as a drainage pipe, but to the corrugated pipe etc. which are used as a conduit pipe which penetrates and protects electric wires. It can also be used.

B: Connection body B ₁ : Split connection body (upstream side)
B ₂ : Split connector body (downstream)
C: Connector D ₁ , D ₂ : Outer diameter of discharge pipe (wavy pipe) d ₁ , d ₂ : Inner diameter of discharge pipe (wavy pipe) d ₁₁ : Maximum inner diameter of discharge pipe pressure contact surface d ₁₂ : Drain pipe Minimum inner diameter of pressure contact surface E ₁ : Discharge port Nc: Shaft center Np ₁ , Np ₂ : Connection shaft center of drain pipe (corrugated pipe) P ₁ : Large diameter drain pipe (corrugated pipe)
P ₂ : Small-diameter drainage pipe (corrugated pipe)
P ₁ a, P ₂ a: annular projections P ₁ b, P ₂ b: annular recesses (outer surface recesses)
Q: Drain drainage discharge direction V: Valve body 1: Drain pipe connection (upstream connection)
3: Connection piece (upstream connection part)
4: Locking restriction claw (locking restriction part)
10: Insertion hole 11: Drain pipe pressure contact surface 15: Abutting step surface 31: Seating body 31e: Drain passage port (drainage channel)
32: Valve plate support 33: Valve plate

Claims (7)

It is a structure of a cylindrical connecting portion that can be connected by inserting the end portions of two types of corrugated pipes having different nominal diameters,
The connecting portion includes an elastically deformable locking restricting portion that allows insertion of the corrugated tube of each nominal diameter and enters the outer surface concave portion of the corrugated tube and restricts withdrawal in the tube axis direction,
The inner peripheral surface at the back of the connection hole in the insertion hole of the connection portion is larger than the outer diameter of the small-diameter corrugated tube over the entire circumference, and the smaller-diameter corrugated tube is directed toward the rear. A structure of a connecting portion, characterized in that it is formed on a tapered surface having a smaller diameter than the outer diameter.   The structure of the connecting portion according to claim 1, wherein the insertion hole whose inner peripheral surface is a tapered surface has an inner diameter larger than that of the corrugated tube having a large diameter on the front side.   The said latching control part enters into any of the outer surface recessed part of each of two types of corrugated pipes from which a diameter differs, and is shared with respect to two types of corrugated pipes, 2. The structure of the connection part according to 2. A connecting body having a cylindrical connecting portion having an insertion hole into which a corrugated tube is inserted from an end portion,
The connecting portion is provided with a restricting portion that allows the corrugated tube to move in the insertion direction and enters the outer surface concave portion of the corrugated tube to prevent the corrugated tube from coming out due to the movement in the anti-insertion direction.
A taper surface that becomes deeper than the maximum outer diameter of the corrugated tube in the insertion region into which the corrugated tube is inserted further into the insertion region into which the corrugated tube is inserted. A connection body characterized by being formed. A connecting portion to which a corrugated pipe as a drain pipe for drainage drainage of air conditioning equipment is inserted and connected is formed on one end side, and the drainage drained from the corrugated pipe is discharged on the other end side. Provided with a cylindrical connection body body with an opening,
The connection portion has a structure according to any one of claims 1 to 3,
Inside the connection body, a valve body that normally closes the discharge opening and opens to form a drainage channel when drainage drainage flows from the one end side is provided,
The valve body includes a valve plate support portion disposed at the center of the tubular connecting body main body, a valve shaft portion supported by the valve plate support portion, and projects outward from the valve shaft portion. A connection body comprising a flexible valve plate portion seated on an annular valve seat portion with a plate support portion on the inside. A connection device for corrugated pipes comprising a connection body having the connection portion of the structure according to any one of claims 1 to 3 and two kinds of corrugated pipes having different diameters,
The insertion hole of the connecting portion has a front side where the end portion of the corrugated tube is inserted larger than the outer diameter of the small-diameter corrugated tube, and becomes smaller than the outer diameter of the small-diameter corrugated tube toward the back. A corrugated tube connecting device, characterized in that it is formed in such a tapered surface. Inserting the end of the corrugated tube into the insertion hole formed in the cylindrical connecting portion at the end of the connection body, and connecting the corrugated tube,
The connecting portion is provided with a restricting portion that allows movement of the corrugated tube in the insertion direction, enters the outer surface recess of the corrugated tube, and restricts withdrawal due to movement in the anti-insertion direction.
The corrugated tube whose end is inserted into the insertion hole of the connector is prevented from being pulled out by the restricting portion, and the portion behind the restricting portion of the corrugated tube is compressed in the tube axis direction. The corrugated tube connection structure, wherein the tip portion of the corrugated tube is deformed and pressed against the insertion hole having a tapered surface whose inner peripheral surface has a small diameter toward the back. .

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