CN113167419B

CN113167419B - Connection fitting for adjusting size of pipe joint

Info

Publication number: CN113167419B
Application number: CN201980074220.XA
Authority: CN
Inventors: 上村义斗
Original assignee: Nitto Kohki Co Ltd
Current assignee: Nitto Kohki Co Ltd
Priority date: 2018-12-20
Filing date: 2019-12-12
Publication date: 2023-01-10
Anticipated expiration: 2039-12-12
Also published as: CN113167419A; WO2020129793A1; JP7163412B2; JPWO2020129793A1

Abstract

Provided is a connection fitting for adjusting the size of a pipe joint, which can connect a male joint member and a female joint member, which are not matched in size. The connection fitting has: a tubular main body (44) having a tubular male portion (40) at one end and a female portion (42) at the other end that receives a male joint member (12) that does not match the dimension; and a sleeve (50) that is slidable on the outer peripheral surface of the cylindrical body. The female part is fitted to the male joint member having the unmatched size, the sleeve (50) is brought into a locking position, the upper lock (46) is engaged and fixed with the male joint member having the unmatched size, and the male part is fitted and connected to the female joint member.

Description

Connection fitting for adjusting size of pipe joint

Technical Field

The present invention relates to a connection fitting for adjusting the size of a pipe joint, which is capable of connecting a male joint member and a female joint member having different sizes from each other with respect to the male joint member, in a pipe joint including the male joint member and the female joint member which are coupled to each other by fitting.

Background

For example, some fluid supply piping systems perform fluid supply in a state where a nozzle (fluid discharge) of a fluid supply pipe is fitted and connected to a container serving as a fluid receiving port on the side receiving fluid supply. In this case, the nozzle and the container constitute the pipe joint of the above-described form, but in this case, the nozzle and the container as the joint members to be fitted to each other have a size (diameter size) suitable for fitting to each other, and when the size of the container on the side receiving the fluid supply does not match the size of the nozzle on the supply side, the fluid supply is not possible. However, there are cases where the side receiving the supply of the fluid is provided with a container having a different size from the nozzle on the supply side, and as a method for enabling the supply of the fluid even in such cases, it is conceivable to prepare a fluid supply pipe having a nozzle having a size suitable for the container having a different size, in addition to a fluid supply pipe having a nozzle having a regular size. However, in such a method, the facility cost and maintenance cost of the supply piping system become high.

As another method thereof, there is a method of using a connection fitting (adapter) for size adjustment for matching with different sizes of the above-described container. For example, patent document 1 discloses such a connection fitting. However, in this connection fitting, the elements constituting the connection fitting are assembled to the supply-side nozzle and fixed by screwing, and it is not possible to quickly attach and detach the connection fitting.

Documents of the prior art

Patent literature

Patent document 1: japanese Utility model laid-open publication No. 6-14673

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above-described problems, and an object thereof is to provide a connection fitting for adjusting the size of a pipe joint, which is used to quickly complete connection of pipe joint members such as containers of different sizes to another pipe joint member such as a nozzle.

Means for solving the problems

That is, the present invention provides a connection fitting for adjusting a size of a pipe joint, which is capable of connecting a male joint member having a different size from a male joint member and a female joint member to each other, in a pipe joint including the male joint member and the female joint member which are fitted to each other and connected, the connection fitting for adjusting a size of a pipe joint including: a cylindrical body having a cylindrical male portion at one end and a cylindrical female portion at the other end, the male portion being formed into a shape that can be received by a female joint member of a pipe joint, the female portion being formed into a shape that receives a male joint member having a size different from that of the male joint member fitted to the female joint member of the pipe joint, the cylindrical body having a locking piece hole provided so as to penetrate in a radial direction of the cylindrical body, the locking piece hole holding a locking piece so as to be displaceable in the radial direction; and a sleeve that is slidable in a longitudinal axis direction of the tubular body on an outer peripheral surface of the tubular body, and that is displaceable between a locked position where the sleeve engages with the locking piece from a radially outer side to engage the upper lock with the different-sized male joint member inserted into the female portion and prevent the different-sized male joint member from being displaced from the inside to the outside of the female portion, and an unlocked position where the sleeve is displaced to the one end side from the locked position to allow the locking piece to be displaced to the radially outer side and allow the different-sized male joint member to be displaced from the inside to the outside of the female portion.

In the size adjustment connection fitting, the sleeve at the locked position may be engaged with the female joint member coupled to the male portion, and may be prevented from being displaced to the unlocked position. The male joint members of different sizes fitted to the female portion are not disengaged in a state where the female joint member is not removed from the female portion.

The size-adjusting fitting may include a cylindrical grip portion that is attached to the cylindrical body, extends in the longitudinal axis direction so as to be concentric with a position radially outside the cylindrical male portion, and is gripped by a user of the size-adjusting fitting of the pipe joint. When the sleeve is operated, the sleeve can be easily operated by gripping the cylindrical grip portion.

In this case, the cylindrical grip portion may have a slit that penetrates in the radial direction and extends in the longitudinal axis direction, the sleeve may have a locking member that extends from the sleeve to the inside in the radial direction of the slit, and the locking member may engage with the male joint member coupled to the female portion to prevent the sleeve from being displaced to the unlock position.

In the above-described connection fitting for adjusting dimensions, the cylindrical body has a hole for a sleeve holder provided radially penetrating the cylindrical body on the one end side of the cylindrical body with respect to the hole for a locking piece, and the sleeve holder is held so as to be displaceable in the radial direction, and when the sleeve is at the unlocking position and the male joint member of the different size is not fitted in the cylindrical female portion, the sleeve holder partially protrudes to the outside of the cylindrical body and the sleeve is prevented from being displaced to the locking position by the sleeve holder.

Specifically, the sleeve locking device may include a sleeve holder engaging member that is provided in the cylindrical body, engages with the sleeve holder from the radially inner side, and is displaceable between a displacement preventing position where the sleeve holder partially protrudes outside the cylindrical body by the sleeve holder engaging member to prevent the sleeve in the unlocked position from being displaced to the locked position, and a displacement allowing position where the sleeve holder engaging member is pushed in from the displacement preventing position to the one end direction and displaces the sleeve holder radially inwardly to allow the sleeve to be displaced to the locked position.

In this case, it is possible to have: a first biasing member that biases the sleeve holder engaging member from the displacement allowing position toward the displacement preventing position; and a second biasing member that biases the sleeve from the unlock position toward the lock position. In this way, when the male joint members of different sizes are inserted and fitted into the female portion, the sleeve holding engagement member can be displaced from the displacement prevention position to the side allowance position, and the sleeve can be automatically displaced from the unlock position to the lock position by the second biasing member.

Hereinafter, an embodiment of a connection fitting for adjusting the size of a pipe joint according to the present invention will be described with reference to the drawings.

Drawings

Fig. 1 is a view showing a dimensional adjustment connection fitting of the present invention, a female joint member of a pipe joint using the dimensional adjustment connection fitting, and a male joint member of a different size from the male joint member of the pipe joint, which is coupled to the female joint member using the dimensional adjustment connection fitting, in a positional relationship before coupling them, and showing the dimensional adjustment connection fitting, the female joint member, and the male joint member of the different size in a longitudinal cross-sectional view.

Fig. 2 is a vertical cross-sectional view showing a state in which the size adjusting connection fitting is fitted and connected to the different-sized male joint member as an initial step performed when the different-sized male joint member and the female joint member are connected to each other.

Fig. 3 is a longitudinal sectional view showing a state where the male joint member and the female joint member of different sizes in the state of fig. 2 are coupled, and shows a state where fluid has not yet flowed and fluid pressure has not been applied in the pipe of the pipe joint.

Fig. 4 is a vertical sectional view similar to fig. 3, but shows a state in which fluid flows in the pipe and fluid pressure is applied.

Detailed Description

In fig. 1, a connection fitting 14 for adjusting the size is shown, in which the connection fitting 14 is used to connect a container (male joint member: only the tip thereof is shown in the drawing) 12 having a size different from a predetermined size to a nozzle (female joint member: only the tip thereof is shown in the drawing) 10 on the fluid supply source side connected to a container (male joint member) having a predetermined size on the fluid receiving side (not shown).

The nozzle 10 has: a nozzle body 22 having a fluid passageway 20; a valve 24; a cylindrical valve support member 26 fixed to the nozzle body 22 and supporting the valve 24 so as to be displaceable in the longitudinal axial direction of the fluid passage 20; a collet member 28; a cylindrical collet support member 30 fixed to the outer peripheral surface of the valve support member 26, extending forward (rightward in the drawing), and supporting the collet member 28 so as to be displaceable between a receiving position shown in fig. 1 and a tightening position shown in fig. 3 and 4; a collet restraint sleeve 32 displaceable in a lengthwise axial direction of the fluid passage 20 between a collet release position allowing the collet member 28 to be in a receiving position and a collet pressing position pressing the collet member 28 in a tightening position; a sleeve locking member 34 which is mounted displaceably in a through hole 33 extending in the radial direction from the fluid passage 20 provided in the nozzle body 22, and which moves radially outward when the fluid pressure in the fluid passage 20 increases, engages with the chuck restraining sleeve 32, and becomes a sleeve locking position (fig. 4) locked at the chuck pressing position; and a collet operating member 36 fixed to the valve 24 and capable of moving between a forward position where the collet member 28 is in a receiving position (fig. 1) by engaging with the collet member 28 from the radially inner side and a backward position where the collet member 28 is allowed to move backward (leftward in the drawing) together with the valve 24 and is in a fastening position.

When the above-described container of a predetermined size, not shown, or the male portion 40 of the size adjustment connection fitting 14, which will be described later, is inserted into the nozzle 10, the valve 24 and the collet operating member 36 are pushed rearward from the positions in fig. 1, the elastic collet member 28 is brought into the tightened position and engaged with the inserted container or the male portion 40, the radial direction passage 24a of the valve 24 is opened, and the fluid flows through the axial direction passage 24b of the valve 24, so that the fluid passage 20 of the nozzle 10 is opened (fig. 3 and 4).

The container 12 has a larger size than a size suitable for coupling with the nozzle 10, and the size-adjustable connection fitting 14 can couple the container 12 having a different size with the nozzle 10. That is, the size adjustment connection fitting 14 includes: a cylindrical main body 44 having a cylindrical male portion 40 at one end (left end in the figure) and a cylindrical female portion 42 at the other end (right end in the figure), the male portion 40 being formed in a shape that can be received by the nozzle 10, the female portion 42 being formed in a shape that can receive the containers 12 of different sizes, the cylindrical main body 44 having a locking-piece hole 48 provided so as to penetrate in a radial direction of the cylindrical main body 44, the locking-piece hole 48 holding the upper locking piece 46 so as to be displaceable in the radial direction; and a sleeve 50 that is slidable in the longitudinal axial direction of the tubular body 44 on the outer peripheral surface of the tubular body 44, and is displaceable between a locked position (fig. 2 to 4) at which the sleeve 50 engages with the locking piece 46 from the outside in the radial direction to engage the locking piece 46 with the containers 12 of different sizes inserted into the female part 42 and prevent the containers 12 from being displaced from the inside to the outside of the female part 42, and an unlocked position (fig. 1) at which the sleeve 50 is displaced to the one end side (left end side in the drawing) from the locked position to allow the locking piece 46 to be displaced radially to the outside and allow the containers 12 to be displaced from the inside to the outside of the female part 42. In the figure, 40a indicates a locking recess for receiving the collet member 28 at the tightening position, and 12a indicates a locking recess for receiving the locking piece 46 pushed inward in the radial direction by the sleeve 50 at the locking position.

The size adjustment connecting metal fitting 14 further includes a cylindrical grip portion 52 which is attached to the cylindrical body 44, extends in the longitudinal axis direction so as to be concentric with the radially outer position of the male portion 40, and can be gripped by a user of the size adjustment connecting metal fitting 14. The cylindrical grip portion 52 has a slit 53 provided so as to penetrate the cylindrical grip portion 52 in the radial direction and extending in the longitudinal axis direction, and the sleeve 50 is provided with an elongated locking member 56 extending inward in the radial direction and passing through the slit 53 to reach substantially the outer surface of the male portion 40, and when the sleeve 50 is displaced between the locked position and the unlocked position, the locking member 56 is displaced along the slit 53. In the illustrated example, the sleeve 50 abuts against the radial surface 44b of the cylindrical body 44 facing the nozzle 10 when it is in the locked position shown in fig. 2 to 4.

The cylindrical body 44 further has a sleeve holder hole 57, and the sleeve holder hole 57 is provided to penetrate in the radial direction on the one end side (left end side in the drawing) of the cylindrical body 44 from the locking piece hole 48, and holds the sleeve holder 54 so as to be displaceable in the radial direction. When the sleeve 50 is in the unlocked position and the container 12 is not received in the female portion 42 (fig. 1), the sleeve holder 54 partially protrudes outside the tubular body 44 and engages with a locking recess 50a provided in the inner circumferential surface of the sleeve 50 to prevent the sleeve 50 from being displaced to the locked position (fig. 2 to 4). In the illustrated example, a sleeve holder engaging member 58 is provided in the tubular body 44, the sleeve holder engaging member 58 is engaged with the sleeve holder 54 from the radially inner side and is displaceable between a displacement preventing position where the sleeve holder engaging member 58 partially projects the sleeve holder 54 to the outside of the tubular body 44 to prevent the sleeve 50 at the unlock position from being displaced to the lock position and a displacement allowing position where the sleeve holder engaging member 58 is pushed in from the displacement preventing position (leftward in the drawing) to displace the sleeve holder 54 radially inward to allow the sleeve 50 to be displaced to the lock position (fig. 2 to 4). The sleeve holder engaging member 58 has an axial fluid passage 58a communicating with an axial fluid passage 44a provided in the tubular body 44.

In the illustrated example, the size adjustment connection fitting 14 is provided with a biasing member (coil spring) 60 that biases the sleeve 50 from the unlock position shown in fig. 1 to the lock position shown in fig. 2 to 4, a biasing member (coil spring) 62 that biases the sleeve holder engaging member 58 from the displacement allowable position shown in fig. 2 to 4 to the displacement prevention position shown in fig. 1, and the nozzle 10 is provided with a biasing member (coil spring) 64 that biases the cartridge restraining sleeve 32 from the cartridge release position shown in fig. 1 to the cartridge pressing position shown in fig. 3 to 4, and a biasing member (coil spring) 66 that biases the cartridge operating member 36 from the retreat position shown in fig. 3 to 4 to the advance position shown in fig. 1.

When the container 12 of different sizes is connected to the nozzle 10 using the connection fitting 14 for size adjustment, the user of the connection fitting 14 for size adjustment first holds the cylindrical holding portion 52 and fits the female portion 42 of the cylindrical body 44 to the container 12 (fig. 2). Thereby, the sleeve holder engaging member 58 is pushed into the displacement allowing position shown in fig. 2 to 4, and the sleeve 50 is brought into the locked position shown in fig. 2 to 4, whereby the connection between the container 12 and the size adjusting connection fitting 14 is completed (fig. 2). Next, the male portion 40 of the size adjustment connection fitting 14 is fitted into the nozzle 10. Thereby, the valve 24 of the nozzle 10 is pushed into the retreated position, the collet operating member 36 is brought into the retreated position shown in fig. 3 to 4, the collet restraining sleeve 32 is brought into the collet pressing position shown in fig. 3 to 4, and the collet member 28 is brought into the fastening position, whereby the size-adjustment connecting fitting 14 and the nozzle 10 are coupled. In this state, when a valve on the fluid supply source side, not shown, is opened, the fluid flows toward the container 12 through the nozzle 10 and the size adjustment connection fitting 14. Thus, the sleeve locking member 34 is brought into the sleeve locking position shown in fig. 4 by the fluid pressure, and engages with the chuck restraining sleeve 32 to prevent the chuck restraining sleeve 32 from moving leftward as viewed in the drawing and to be brought into the chuck releasing position (fig. 4). In this state, the distal end portion (right end portion as viewed in the drawing) 30a of the cartridge supporting member 30 engages with the locking member 56 extending from the sleeve 50 of the connection fitting 14 for size adjustment, and the cartridge restraining sleeve 32 is held at the cartridge pressing position shown in fig. 4 in a state where the fluid from the fluid supply source side flows, so that the sleeve 50 is prevented from being displaced to the unlock position shown in fig. 1.

When the container 12 is detached from the connected nozzle 10, first, a valve, not shown, on the fluid supply source side is closed to stop the supply of the fluid. As a result, the sleeve locking member 34 can be displaced radially inward, and the cartridge restraining sleeve 32 is moved from the cartridge pressing position shown in fig. 4 to the cartridge releasing position shown in fig. 1, thereby detaching the nozzle 10 from the size adjustment connecting fitting 14. Next, the sleeve 50 of the size-adjusting coupler fitting 14 is brought into the unlocked position shown in fig. 1, and the size-adjusting coupler fitting 14 is removed from the container 12.

The embodiment of the connection fitting 14 for adjusting the size of the pipe joint according to the present invention is as described above, but the present invention is not limited thereto. For example, the sleeve holder 54 is used to automatically connect the sizing connection fitting 14 to the container 12 by automatically bringing the sleeve 50 to the locked position and bringing the upper lock 46 to the locked position as the sizing connection fitting 14 is fitted to the container 12, but the sleeve holder 54 is not essential because the operation of the sleeve 50 can be manually performed. The cylindrical grip portion 52 is not essential, and is used to facilitate the operation of the size adjustment connection fitting 14. The present invention has a basic configuration defined in claim 1, and can be variously modified.

Description of reference numerals:

nozzle (female joint member) 10

Containers (male joint members) 12 of different sizes

Size adjustment connection fitting 14

Fluid passage 20

Nozzle body 22

Valve 24

Radial direction passage 24a

Axial direction passage 24b

Valve support member 26

Collet member 28

Chuck support member 30

Chuck restraint sleeve 32

Sleeve locking member 34

Chuck operating member 36

Male portion 40

Female part 42

Cylindrical body 44

Axial fluid passage 44a

Radial surface 44b

Upper locking member 46

Hole 48 for locking part

Sleeve 50

Locking recess 50a

Cylindrical grip portion 52

Slit 53

Sleeve holder 54

Locking member 56

Hole 57 for sleeve holder

Sleeve holder engagement member 58

Axial fluid passage 58a

Urging members (coil springs) 60, 62, 64, 66.

Claims

1. A connection fitting for adjusting the size of a pipe joint, which can connect a male joint member and a female joint member having different sizes from each other to each other in a pipe joint including the male joint member and the female joint member which are fitted to each other and connected to each other,

the size adjustment connecting fitting for a pipe joint comprises:

a cylindrical body having a cylindrical male portion at one end and a cylindrical female portion at the other end, the male portion being formed in a shape that can be received by a female joint member of a pipe joint, the female portion being formed in a shape that receives a male joint member of a different size from a male joint member to be fitted to the female joint member of the pipe joint, the cylindrical body having a locking piece hole provided so as to penetrate in a radial direction of the cylindrical body, the locking piece hole holding a locking piece so as to be displaceable in the radial direction; and

a sleeve that is slidable in a longitudinal axis direction of the tubular body on an outer peripheral surface of the tubular body, and that is displaceable between a locked position where the sleeve engages with the locking piece from a radially outer side to engage the upper lock with the different-sized male joint member inserted into the female portion and prevent the different-sized male joint member from being displaced from the inside of the female portion to the outside, and an unlocked position where the sleeve is displaced to the one end side from the locked position to permit the locking piece to be displaced to the radially outer side and permit the different-sized male joint member to be displaced from the inside of the female portion to the outside,

the sleeve at the locked position is engaged with the female joint member connected to the male portion, and is prevented from being displaced to the unlocked position.

2. The connection fitting for size adjustment of a pipe joint according to claim 1,

the size-adjusting connection fitting for a pipe joint has a cylindrical grip portion that is attached to the cylindrical body, extends concentrically in the longitudinal axis direction at a position radially outside the male portion, and can be gripped by a user of the size-adjusting connection fitting for a pipe joint.

3. The connection fitting for adjusting the size of a pipe joint according to claim 2,

the cylindrical holding part has a slit penetrating in the radial direction and extending in the longitudinal axis direction,

the sleeve has a locking member extending from the sleeve to the inside of the slit in the radial direction,

the locking member engages with the female joint member connected to the male portion to prevent the sleeve from being displaced to the unlocking position.

4. The connection fitting for adjusting the size of a pipe joint according to claim 1,

the cylindrical body has a hole for a sleeve holder provided radially penetrating the hole for the sleeve holder on the one end side of the hole for the locking piece and holding the sleeve holder so as to be displaceable in the radial direction,

when the sleeve is in the unlocked position and the male joint member of different dimensions is not received within the cylindrical female portion, the sleeve retainer partially projects outward of the cylindrical body, thereby preventing displacement of the sleeve to the locked position.

5. The connection fitting for size adjustment of a pipe joint according to claim 4,

the connection fitting for adjusting the size of the pipe joint includes a sleeve holder engaging member that is provided in the cylindrical body, engages with the sleeve holder from the inside in the radial direction, and is displaceable between a displacement preventing position where the sleeve holder engaging member partially protrudes outside the cylindrical body to prevent the sleeve in the unlocked position from being displaced to the locked position, and a displacement allowing position where the sleeve holder engaging member is pushed in from the displacement preventing position to the one end direction and displaces the sleeve holder to the inside in the radial direction to allow the sleeve to be displaced to the locked position.

6. The connection fitting for size adjustment of a pipe joint according to claim 5,

the size adjustment connecting fitting for a pipe joint comprises: a first urging member that urges the sleeve holder engagement member from the displacement allowing position toward the displacement preventing position; and a second biasing member that biases the sleeve from the unlock position toward the lock position.

7. A connection fitting for adjusting the size of a pipe joint, which can connect a male joint member and a female joint member having different sizes from each other to each other in a pipe joint including the male joint member and the female joint member which are fitted to each other and connected to each other,

the size adjustment connecting fitting for a pipe joint comprises:

a tubular main body having a tubular male portion at one end and a tubular female portion at the other end, the male portion having a shape that can be received by a female joint member of a pipe joint, the female portion having a shape that receives a male joint member having a different size from a male joint member to be fitted to the female joint member of the pipe joint, and the tubular main body having a locking piece hole that is provided so as to penetrate in a radial direction of the tubular main body and holds a locking piece so as to be displaceable in the radial direction; and

8. The connection fitting for adjusting the size of a pipe joint according to claim 7,