JP2006242235A - Pipe connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe connection structure for allowing the connection of a pipe terminal portion of a pipe to a valve casing with snap action of single-hand. <P>SOLUTION: A main body consists of the valve casing 1 in which a flow path 10 is formed and at both ends of which connection ports 2 are formed, a spherical valve element 3 rotatably arranged in the flow path 10 for opening/closing the flow path 10, and a pair of bevel gears 5 for transmitting driving force from the pipe terminal portion 4 to be connected to the connection port to the spherical valve element. One bevel gear 5a is rotatably arranged for an in-gear flow path 50 to be communicated with one connection port 2a, while the other bevel gear 5b is rotatably arranged to which the spherical valve element 3 is fixed. An engaging portion 40 is provided on the outer peripheral face at the front end of the pipe terminal portion 4 to be connected to the connection port 2a, an engaging portion inserting-through portion 21 is formed on the inner face of the connection port 2a, and an engaged portion 51 to be engaged with the engaging portion 40 is provided on the inner face of the in-gear flow path 50 of the bevel gear 5a. The engaging portion inserting-through portion 21 is communicated with the engaged portion 51 when the flow path 10 in the valve casing 1 is closed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pipe connection structure.

  Conventionally, as a pipe connection structure for connecting a flexible pipe such as a rubber pipe to a valve casing such as an outlet, a structure for connecting a pipe terminal attached to the pipe to a connection port of the valve casing is known. (For example, refer to Patent Document 1 and Patent Document 2).

  In this conventional pipe connection structure, a connection socket as a pipe terminal is attached to a fluid pipe as a pipe, and the connection socket is attached to a plug of an insertion port as a connection port, and a lid is rotated for fluid use. The connection is completed by opening the fluid valve in the outlet fluid passage.

However, in this conventional piping connection structure, after attaching the connection socket of the fluid pipe to the plug of the insertion port, it is necessary to turn the lid this time. Since the mounting on the plug and the rotation of the lid are separate operations, if these operations are performed with both hands or if it is attempted with one hand, it is necessary to carry out the operation by changing the connection socket to the lid. The connection work could not be completed easily with one touch.
JP-A-2-51678 Japanese Patent Laid-Open No. 2-76982

  The present invention was invented in view of the above-described conventional problems, and the object of the present invention is to easily complete the connection work of the piping terminal portion of the piping to the valve housing with one hand and one touch. It is an object to provide a pipe connection structure.

  In order to solve the above-mentioned problem, in the pipe connection structure according to claim 1, the valve housing 1 in which the flow path 10 is formed inside and the connection ports 2 are formed at both ends thereof, A spherical valve body 3 that is rotatably arranged in the flow path 10 and opens and closes the flow path 10 by the rotation, and a driving force from the pipe terminal portion 4 connected to the connection port 2 is transmitted to the spherical valve body 3. The pair of bevel gears 5a and 5b is a main body, and the bevel gear 5a communicates with the one connection port 2a through one bevel gear 5a formed through the in-gear passage 50 along the axis A of the rotation center. The other bevel gear 5b meshing with one bevel gear 5a is rotatably arranged so that the spherical valve body 3 is fixed to the other bevel gear 5b, and is connected to one connection port 2a. While providing the engaging portion 40 on the outer peripheral surface of the distal end portion of the pipe terminal portion 4 to be connected, The engagement portion insertion portion 21 through which the engagement portion 40 is inserted is formed on the inner surface of the other connection port 2a, and the engagement portion 40 is engaged with the inner surface of the in-gear passage 50 of one bevel gear 5a. Part 51 is formed, and the engaging part 40 of the pipe terminal part 4 is engaged when the flow path 10 of the valve housing 1 is closed and the engaging part insertion part 21 and the engaged part 51 communicate with each other. The part insertion part 21 is inserted and engaged with the engaged part 51, and the pipe terminal part 4 is rotated via the pair of bevel gears 5a and 5b by the engagement of the engaging part 40 and the engaged part 51. Thus, the flow path 10 is opened and closed by rotating the spherical valve body 3.

  By adopting such a configuration, when connecting the pipe terminal portion 4 provided in the pipe 7 to the connection port 2a of the valve housing 1, the engaging portion 40 of the pipe terminal portion 4 is formed on the inner surface of the connection port 2a. The spherical valve body 3 is inserted through the pair of bevel gears 5a and 5b by inserting the engagement portion insertion portion 21 and engaging with the engaged portion 51 of one bevel gear 5a and rotating the pipe terminal portion 4 as it is. The flow path 10 can be opened by rotating it, and when it is in the closed state, the pipe terminal portion 4 is prevented from coming off from the connection port 2a.

  Further, in claim 2, the rotating main shaft 53 of the other bevel gear 5b is exposed to the outside of the valve housing 1, and a rotating portion 54 for rotating the rotating main shaft 53 is provided on the exposed portion. It is a feature.

  By adopting such a configuration, in the unlikely event that the bevel gear 5a cannot be rotated by the pipe terminal portion 4 inserted from the connection port 2a, the rotating main shaft 53 is rotated by the rotating portion 54 to thereby rotate the flow path 10. Can be opened and closed.

  In the present invention, when connecting the piping to the valve housing, the engaging portion of the piping terminal portion of the piping is inserted through the engaging portion insertion portion formed on the inner surface of the connection port of the valve housing and the one umbrella It is possible to engage the engaged part of the gear, rotate the pipe terminal as it is, rotate the spherical valve body via a pair of bevel gears, and open the flow path with one hand and with one touch Connection work can be completed easily.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the pipe connection structure of the present invention includes a valve housing 1 in which a flow path 10 is formed and connection ports 2 are formed at both ends thereof, and a flow path 10 of the valve housing 1. A spherical valve body 3 that is rotatably disposed inside and opens and closes the flow path 10 and a pair of umbrellas that transmit the driving force from the pipe terminal portion 4 connected to the connection port 2 to the spherical valve body 3. The gear 5 (5a, 5b) constitutes the main body.

The valve housing 1 has a rectangular box shape or a bottomed cylindrical shape in which a flow path 10 is formed. A connection port 2 communicating with an external space is formed at both ends of the flow path 10. It is. In the present embodiment, connection ports 2a and 2b each having a substantially cylindrical shape project from the opposite side wall portions 11a and 11b of the valve housing 1 so as to project outward, and the flow path 10 is formed between the connection ports 2a and 2b. However, the connection port 2 does not have to protrude particularly. This valve housing 1 is formed by forming a side wall portion 11a formed with one connection port 2a so as to be a detachable lid with respect to the remaining portion of the valve housing 1, so that the spherical valve body 3 and The bevel gear 5 can be inserted. Side wall portions 11a of the lid is secured by fitting or screwing, bonding, welding or the like through the O-ring S ₁ to the rest of the valve housing 1. The spherical valve body 3 and the bevel gear 5 are accommodated in the flow path 10 of the valve housing 1.

  The spherical valve body 3 is formed by penetrating the valve body flow path 30 in one diameter direction, and a valve body receiving portion described later so that the position of the valve housing 1 in the flow path 10 is fixed and rotatable. 6 is supported.

One bevel gear 5a of the pair of bevel gears 5 is provided on the inner surface side of one connection port 2a, and has an in-gear passage 50 formed so as to penetrate along the axis A of the rotation center of the bevel gear 5a. In addition, the in-gear passage 50 is disposed on the inner surface of the side wall 11a so as to communicate with the connection port 2a. In this embodiment, while forming the circular recessed step part 12 in the inner surface of the side wall part 11a, the convex step part 52 which fits into the recessed step part 12 in the surface of the side contact | abutted to the inner surface of the side wall part 11a of the bevel gear 5a. Yes forming a bevel gear 5a is rotatably fits in a state in which the convex stepped portion 52, as the gear fluid path 50 is communicated with the connection port 2a is in close contact via the O-ring S ₂ to the recessed step 12 It arrange | positions so that it may become. The bevel gear 5a is formed with an engaged portion 51 that engages with an engaging portion 40 of the pipe terminal portion 4 described later on a part of the inner surface of the in-gear passage 50 in the circumferential direction.

The other bevel gear 5b is disposed so that its axis of rotation B is meshed with the axis of rotation a of the one bevel gear 5a substantially orthogonally. The bevel gear 5b is provided so that the rotation main shaft 53 protrudes on both the inner and outer sides along the axis B of the rotation center. Portion 53a which projects to the outside of the rotary spindle 53, Yes is fitted so as to be rotatable via the O-ring S ₃ while penetrating the side wall 11c which is substantially perpendicular to the flow path 10 of the valve housing 1, A rotating end 54 for rotating the rotation main shaft 53 is provided on the protruding end surface exposed to the outside. The rotating portion 54 may be a groove for inserting a screwdriver, a tool mounting portion (groove in the present embodiment) composed of a convex portion that can be clamped by a clamping tool, or a picking portion that is picked by hand. It is not limited. A portion 53 b that protrudes inside the rotation main shaft 53 is fixed to the spherical valve body 3. The spherical valve body 3 is fixed to the rotation main shaft 53 so that the flow direction of the flow passage 30 in the valve body is substantially orthogonal to the axis B (that is, the rotation main shaft 53) of the rotation center of the other bevel gear 5b. By rotating 5b, the valve body flow path 30 of the spherical valve body 3 communicates with the flow path 10 in the valve housing 1 (see FIG. 2), and the bevel gear 5b is rotated about 90 degrees from the open state. The valve body flow path 30 of the spherical valve body 3 is made substantially orthogonal to the flow path 10 in the valve housing 1, and the flow path 10 in the valve housing 1 is closed by the spherical valve body 3 (FIG. 1). Can be switched).

The valve body receiving portion 6 that supports the spherical valve body 3 is provided on the inner surface side of the side wall portions 11a and 11b in which the connection ports 2a and 2b of the valve housing 1 are formed, and on one connection port 2a side, The valve body receiving portion 6a is fitted and attached to the step portion 55 at the center of one bevel gear 5a disposed on the inner surface side of the side wall portion 11a, and on the other connection port 2b side, the side wall portion 11b. is mounted a valve member receiving part 6b through the O-ring S ₄ of the inner surface side. A recess 61 having a shape along the surface of the spherical valve body 3 is formed on the surface of the valve body receiving portion 6 on the spherical valve body 3 side, and the flow path 10 is formed at the center bottom of the recess 61. A part of the hole 62 is formed through. The surface of the spherical valve body 3 is closely attached to the recess 61 of the valve body receiving portion 6 without any gap. When the flow path 10 is in the open state, the valve body flow path 30 of the spherical valve body 3 is formed in the recess 61. The flow path without leakage is formed between the spherical valve body 3 and the valve body receiving portion 6 in communication with the hole 62 (see FIG. 2). When the flow path 10 is closed, the hole of the valve body receiving portion 6 is formed. 62 is blocked by the spherical valve body 3 so as not to leak (see FIG. 1).

The connection port 2 functions as a socket into which the pipe terminal portion 4 made of a plug is inserted. When the pipe terminal portion 4 is inserted, the O-ring S ₅ seals the connection port 2. In the present embodiment, although not shown, the other connection port 2b is connected to the pipe terminal portion 4 having a substantially cylindrical shape, and the one connection port 2a has a substantially cylindrical shape on the outer periphery thereof. The piping terminal part 4 which formed the engaging part 40 is inserted and connected, and this one connection port 2a and the piping terminal part 4 are demonstrated.

  As shown in FIG. 1, the piping terminal portion 4 connected to one connection port 2 a includes a substantially cylindrical body portion 41 and a substantially cylindrical connection portion 42 formed at the tip of the body portion 41. The pipe 7 having flexibility such as a rubber tube is attached to the main body 41. The pipe terminal portion 4 is attached to the pipe 7 so as to be rotatable around the longitudinal direction. One connection port 2a has a fitting surface 22 that is substantially the same diameter as the connection portion 42 of the pipe terminal portion 4 and into which the connection portion 42 is inserted. The connection of the pipe terminal portion 4 that is inserted into the connection port 2a. The part 42 is inserted in the insertion surface 22 and the in-gear passage 50 of the bevel gear 5a communicating with the insertion surface 22.

  In the present embodiment, a key-like engaging portion 40 is formed in a part of the circumferential direction in the connecting portion 42 of the piping terminal portion 4 as shown in FIG. 3, while the fitted surface 22 of the connecting port 2a. Is formed with a key groove-shaped engaging portion insertion portion 21 in a part in the circumferential direction, and the bevel gear 5a has a key groove-shaped covering on a portion in the circumferential direction of the inner surface of the in-gear passage 50. An engaging portion 51 is formed. In addition, about the engaging part 40, the engaging part insertion part 21, and the to-be-engaged part 51, the engaging part 40 is made into a key-shaped convex part, the engaging part insertion part 21, and the to-be-engaged part like this embodiment. 51 is not a key groove-shaped recess, the engaging portion 40 is a recess, the engaging portion insertion portion 21 and the engaged portion 51 are convex portions, or the engaging portion 40 and the engaging portion insertion portion 21 and the engaged portion are engaged. It is good also as the shape of the combination of the unevenness | corrugation which reversed the uneven | corrugated | grooved part with the part 51. FIG. The engaging portion insertion portion 21 of the connection port 2a and the engaged portion 51 of the bevel gear 5a communicate with each other when the flow path 10 is closed as shown in FIG. As shown in the figure, when the flow path 10 is in the open state, the circumferential position is shifted so as not to communicate. At this time, by setting the number of teeth so that the rotation angle of the other bevel gear 5b is, for example, 90 degrees with respect to the rotation angle of one bevel gear 5a, for example, 30 to 70 degrees, the pipe terminal portion is manually set. The spherical valve body 3 can be rotated, for example, 90 degrees simply by rotating 4 for example, 30 to 70 degrees. Also, one bevel gear 5a has a closed position where the engaged portion 51 communicates with the engaging portion insertion portion 21 as shown in FIG. 3A, and as shown in FIG. 3B. A restricting portion (not shown) is provided so as to be movable only between the position in the open state shifted from the engaging portion insertion portion 21. The restricting portion is not particularly limited, and may be a convex portion provided on the bevel gear 5a and the valve housing 1 or the like.

  Further, at this time, a mark (not shown) is provided on a part of the outer surface of the connection portion 42 of the pipe terminal portion 4 in the circumferential direction, and the connection portion 42 in the closed state of FIG. A mark (not shown) indicating the closed state is provided at a position corresponding to the mark position, and a mark (not shown) indicating the open state at a position corresponding to the mark position of the connecting portion 42 in the open state of FIG. May be provided so that the open / closed state of the flow path 10 can be understood.

  The attachment of the pipe 7 to the valve housing 1 in this pipe connection structure will be described. Although not shown, the valve housing 1 is used in a hub portion arranged under the floor or the like to branch a main water channel from a water storage tank to a branch water channel to each use location, or is installed on a wall or a floor. Although it is used as a water outlet, it can of course be used in other parts. When used in the hub portion, a plurality of the valve casings 1 are arranged side by side, pipes from the main water channel are connected to the other connection ports 2b, and pipes 7 branching to the use locations are connected to the respective connection ports 2a. Connection may be made as appropriate, but the usage pattern is not particularly limited.

  The pipe 7 is connected to one connection port 2a. For this purpose, first, as shown in FIG. 1, the connection part 42 of the pipe terminal part 4 is inserted into the connection port 2a. At this time, the valve housing 1 is in a closed state, and the engagement portion insertion portion 21 of the connection port 2a and the engaged portion 51 of the bevel gear 5a communicate with each other. The engaging portion 40 of 42 is inserted into the engaging portion insertion portion 21 and engaged with the engaged portion 51 of the bevel gear 5a.

  Next, the bevel gear 5 a in which the engaging portion 40 of the connecting portion 42 of the piping terminal portion 4 is inserted is rotated with respect to the valve housing 1 by rotating the piping terminal portion 4 by hand. By rotating the bevel gear 5a, as shown in FIG. 2, the other bevel gear 5b and the spherical valve body 3 are rotated and the flow path 10 is opened.

  In the open state of the flow path 10, as described above, the engagement portion insertion portion 21 of the fitted surface 22 of the connection port 2 a and the engaged portion 51 of the bevel gear 5 a are displaced in the circumferential direction and do not communicate with each other. The engaging portion 40 of the connecting portion 42 of the pipe terminal portion 4 engaged with the engaged portion 51 is in a state of being prevented from coming off from the connection port 2a. In this way, the connection between the pipe 7 and the valve housing 1 is completed.

  To remove the pipe 7 from the valve housing 1, the pipe terminal 4 is rotated in the opposite direction to the closed state to return to the closed state, and the engagement portion insertion portion 21 of the connection port 2 a and the bevel gear 5 a are engaged. The part 51 is brought into a state of communication, and the engaging part 40 of the pipe terminal part 4 engaged with the engaged part 51 is inserted through the engaging part insertion part 21 of the connection port 2a and removed from the connection port 2a. Can do.

  Note that the flow path 10 is normally opened and closed by rotating the pipe terminal portion 4 inserted into the connection port 2a as described above. However, the bevel gear 5a is moved by the pipe terminal portion 4 inserted into the connection port 2a. If it cannot be rotated, a tool (not shown) such as a screwdriver is inserted into the rotating portion 54 formed on the protruding end surface of the rotation main shaft 53 of the other bevel gear 5b and rotated to thereby rotate the bevel gear 5b and the spherical shape. The valve housing 1 can be opened and closed by rotating the valve body 3. Thereby, for example, even when the engaging portion 41 of the pipe terminal portion 4 inserted into the connection port 2a is damaged and clogged with the engaged portion 51 of the bevel gear 5a, the spherical valve body 3 is rotated to flow the channel. 10 can be opened and closed.

  According to the above configuration, when connecting the pipe terminal 4 provided on the pipe 7 to the connection port 2a of the valve housing 1, the engaging part 40 of the pipe terminal 4 is formed on the inner surface of the connection port 2a. The spherical valve body 3 is inserted through the pair of bevel gears 5a and 5b by inserting the engagement portion insertion portion 21 and engaging with the engaged portion 51 of one bevel gear 5a and rotating the pipe terminal portion 4 as it is. It can be rotated to open the flow path 10 and prevent the piping terminal section 4 from coming off from the connection port 2a, so that the pipe can be easily connected to the valve housing with one hand and one touch. It is. Also, the work of removing the pipe 7 from the valve housing 1 can be easily performed with one hand and with one touch by the reverse procedure of the connection work.

(A) is a sectional side view of the state which has not connected piping and a valve housing in one embodiment of the present invention, and (b) is a front view of a piping terminal part. It is a sectional side view of the state which connected piping and a valve housing | casing in the same as the above. It is a figure explaining the positional relationship of the engaging part insertion part of a connection port, and the to-be-engaged part of a bevel gear, (a) is the state which the engaging part insertion part and the to-be-engaged part communicated in the closed state It is a front view to explain, (b) is a front view explaining the state where the engaging portion insertion portion and the engaged portion are not in communication in the open state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve housing | casing 10 Flow path 2 Connection port 2a One connection port 21 Engagement part insertion part 3 Spherical valve body 4 Piping terminal part 40 Engagement part 5 Bevel gear 5a One bevel gear 5b The other bevel gear 50 Gear internal flow Path 51 Engagement part A Rotation center axis

Claims (2)

  A valve housing that forms a flow path therein and connection ports at both ends thereof, a spherical valve body that is rotatably disposed in the flow path of the valve housing and opens and closes the flow path by rotation thereof; One bevel gear that is mainly composed of a pair of bevel gears that transmit the driving force from the pipe terminal connected to the connection port to the spherical valve body, and that is formed through the gear flow passage along the axis of rotation center And the other bevel gear meshing with the one bevel gear is rotatably disposed so that the spherical valve is connected to the other bevel gear. An engagement portion insertion portion through which the engagement portion is inserted into the inner surface of the one connection port is provided with an engagement portion on the outer peripheral surface of the distal end portion of the piping terminal portion connected to the one connection port. The engaged portion is formed and engaged with the inner surface of the in-gear flow path of one of the bevel gears. And when the flow path of the valve housing is closed and the engagement portion insertion portion and the engaged portion are in communication, the engagement portion of the pipe terminal portion is inserted through the engagement portion insertion portion. Engaging the joint portion, and opening and closing the flow path by rotating the spherical valve body via a pair of bevel gears by the rotation of the piping terminal portion in the engaged state of the engaging portion and the engaged portion. Characteristic piping connection structure.   2. The pipe connection structure according to claim 1, wherein the rotation main shaft of the other bevel gear is exposed to the outside of the valve housing, and a rotating portion for rotating the rotation main shaft is provided at the exposed portion.

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