JP6913541B2 - Connection structure of fluid equipment - Google Patents

Description

The present invention relates to a connection structure of a fluid device.

Conventionally, fluid devices provided in manufacturing devices in technical fields such as semiconductor manufacturing, medical / pharmaceutical manufacturing, food processing, and chemical industry are connected by pipe fittings as described in Patent Document 1. For this type of manufacturing equipment, it is desirable to fluidly connect the fluid devices to which the fittings are applied (so that the fluid can flow inside). In this case, the fluid devices have a tube or the like in which the first pipe joint applied to one first fluid device and the second pipe joint applied to the other second fluid device are different from the pipe joint. Be connected.

Japanese Unexamined Patent Publication No. 10-054489

In the conventional connection structure of fluid equipment, it is necessary to use a tube to fluidly connect the first fluid equipment and the second fluid equipment to each other via the first pipe joint and the second pipe joint. there were. Further, in order to join both ends of the tube in the longitudinal direction to the first pipe joint and the second pipe joint, respectively, it is necessary to use an inner ring and a union nut having a relatively large axial dimension in each pipe joint. ..

Therefore, when the first fluid device and the second fluid device are fluidly connected to each other, the application location of the first pipe joint in the first fluid device and the application of the second pipe joint in the second fluid device Space had to be reserved between the points for the tubes, as well as the inner rings and union nuts in each pipe joint. Therefore, it has been difficult to save the installation space between the first fluid device and the second fluid device that are fluidly connected to each other.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a connection structure for a fluid device, which can save space for installing the fluid device.

The present invention
It is a connection structure of the fluid equipment that connects the first fluid equipment and the second fluid equipment.
A tubular first receiving portion connected to the first fluid flow path of the first fluid device and provided in the first fluid device.
A tubular second receiving portion connected to the second fluid flow path of the second fluid device and provided in the second fluid device,
A first tubular member having a first engaging portion and provided in the first receiving portion,
A second tubular member having a second engaging portion that can be engaged with the first engaging portion and provided in the second receiving portion.
With a connecting body provided between the first receiving portion and the second receiving portion, sealing between the first receiving portion and sealing between the second receiving portion and the second receiving portion. , Equipped with
The second tubular member and the first tubular member are fixed by the engagement between the second engaging portion and the first engaging portion.

According to this configuration, the first fluid device and the second fluid device can be fluidly connected while maintaining the fixed state of the first tubular member and the second tubular member. In addition, it is possible to prevent fluid leakage from the connection portion of the two fluid devices. Further, in order to fluidly connect the first fluid device and the second fluid device, it is not necessary to interpose a member such as a tube between the first fluid device and the second fluid device. Therefore, it is possible to save the installation space of these fluid devices by fluidly connecting the two fluid devices in a state of being as close as possible to each other.

According to another aspect of the invention
The first tubular member has a first main body portion that is fixed in a state of being fitted onto the first receiving portion, and the first main body portion that protrudes in the axial direction of the first tubular member and with respect to the first main body portion. It is provided with a first engaging claw provided on the first main body portion so as to be flexible.
The second tubular member protrudes in the axial direction of the second main body portion fixed in a state of being fitted onto the second receiving portion and the second main body portion, and engages with the first engaging claw. It is provided with a second engaging claw or a claw holder provided on the second main body portion so as to be able to do so.
In a state where the first engaging claw and the second engaging claw or the claw receiver facing the first engaging claw are engaged, the separation between the first tubular member and the second tubular member Be regulated.

According to a further aspect of the invention
The first receiving portion has the same shape as the second receiving portion and has the same shape.
The first tubular member has the same shape as the second tubular member.

According to yet another aspect of the invention.
The first receiving portion and the second receiving portion are arranged coaxially with each other and are connected only via the connecting body.

According to yet another aspect of the invention.
The connecting body has an overhanging portion located between the first receiving portion and the second receiving portion.

According to the present invention, it is possible to save the installation space of the fluid device.

It is sectional drawing of the connection structure of the fluid device which concerns on 1st Embodiment of this invention. It is a partially enlarged view of FIG. It is a figure which shows the separation state of two fluid devices in the connection structure of the fluid device of FIG. It is a figure which shows the state in the process of connecting two fluid devices in the connection structure of the fluid device of FIG. It is sectional drawing of the connection structure of the fluid device which concerns on 2nd Embodiment of this invention. It is sectional drawing of the connection structure of the fluid device which concerns on 3rd Embodiment of this invention. It is sectional drawing of the connection structure of the fluid device which concerns on 4th Embodiment of this invention. It is sectional drawing of the connection structure of the fluid device which concerns on 5th Embodiment of this invention. 8 is a partial cross-sectional view of the engaged state of the first engaging portion of the first tubular member and the second engaging portion of the second tubular member in FIG. 8 as viewed from the first fluid device side. It is a plane which shows the state in the process of connecting two fluid devices in the connection structure of the fluid device of FIG. FIG. 10 is a partial cross-sectional view of the vicinity of the first engaging portion of the first tubular member and the vicinity of the second engaging portion of the second tubular member as viewed from the first fluid device side. It is sectional drawing of the connection structure of the fluid device which concerns on 6th Embodiment of this invention. It is a perspective view of the 1st tubular member or the 2nd tubular member in FIG. It is a front view of the 1st tubular member or the 2nd tubular member in FIG.

The first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of a connection structure of a fluid device according to a first embodiment of the present invention. FIG. 2 is a partially enlarged view of FIG. FIG. 3 is a diagram showing a separated state of the two fluid devices 1 and 2 in the connection structure of the fluid devices of FIG. FIG. 4 is a diagram showing a state in which the two fluid devices 1 and 2 are in the process of being connected in the connection structure of the fluid devices of FIG.

As shown in FIGS. 1 to 4, the fluid device connection structure according to the present embodiment is used to fluidly connect the first fluid device 1 and the second fluid device 2. In other words, the connection structure of the fluid device is such that the fluid can flow inside by connecting the first fluid device 1 and the second fluid device 2.

The first fluid device 1 and the second fluid device 2 have a shape that can be juxtaposed in close proximity to each other. Specific examples of each of the first fluid device 1 and the second fluid device 2 include, but are not limited to, valves, flow meters, pumps and joints having a predetermined fluid flow path.

The connection structure of the fluid device includes a first receiving portion 11, a second receiving portion 12, a first tubular member 13, a second tubular member 14, and a connecting body 15.

The first receiving portion 11 is provided in the first fluid device 1. The first receiving portion 11 is connected to the first fluid flow path 21 of the first fluid device 1. The first receiving portion 11 is formed in a tubular shape.

The second receiving portion 12 is provided in the second fluid device 2. The second receiving portion 12 is connected to the second fluid flow path 25 of the second fluid device 2. The second receiving portion 12 is formed in a tubular shape.

The first tubular member 13 has a first engaging portion 53. The first tubular member 13 is provided in the first receiving portion 11.

The second tubular member 14 has a second engaging portion 54 that can be engaged with the first engaging portion 53. The second tubular member 14 is provided in the second receiving portion 12.

The connecting body 15 is provided between the first receiving portion 11 and the second receiving portion 12. The connecting body 15 is configured to seal between the first receiving portion 11 and the second receiving portion 12.

Then, in the connection structure of the fluid device, the second tubular member 14 and the first tubular member 13 are fixed by the engagement between the second engaging portion 54 and the first engaging portion 53.

In the present embodiment, the two fluid devices 1 and 2 related to the connection structure of the fluid devices are installed with their respective receiving portions 11 and 12 facing each other in the axial direction.

The first receiving portion 11 is applied to the first fluid device 1. In the present embodiment, the first receiving portion 11 is integrated with the casing 35 of the first fluid device 1. The first receiving portion 11 does not have to be integrally formed with the casing 35, and may be a separate body.

The first receiving portion 11 has an outer cylinder portion 41 and an inner cylinder portion 42. The outer cylinder portion 41 is made of a cylindrical body having a substantially constant inner diameter, and is provided so as to project to the outside of the casing 35 in the vicinity of the vicinity of the opening of the first fluid flow path 21 in the casing 35.

The outer cylinder portion 41 is formed so that a part of the connecting body 15 can be fitted from the protruding end portion (one end in the axial direction) 43 side. The outer cylinder portion 41 is arranged with substantially no gap with respect to a part of the connected body 15 after fitting in the radial direction thereof.

Further, the outer cylinder portion 41 includes the first screw 23. The first screw 23 is provided on the outer periphery of the outer cylinder portion 41 with the first screw 23 along the axial direction of the outer cylinder portion 41. The first screw 23 is composed of a male screw.

The inner cylinder portion 42 is formed of a cylindrical body that is smaller than the inner diameter of the outer cylinder portion 41 and has a substantially constant outer diameter, and the outer cylinder portion 41 protrudes in the vicinity of the vicinity of the opening of the first fluid flow path 21 in the casing 35. It is provided so as to project in the same direction as (one of the axial directions of the first receiving portion 11). The inner cylinder portion 42 is arranged inward in the radial direction of the outer cylinder portion 41 at predetermined intervals, and extends in the axial direction in relation to the outer cylinder portion 41.

Here, the inner cylinder portion 42 protrudes from the casing 35 from the outer cylinder portion 41 so that the protruding end portion 44 is located on the opposite side of the protruding end portion 43 of the outer cylinder portion 41 with respect to the protruding direction. It is provided so as not to. In this way, the first receiving portion 11 exhibits a double tubular shape in the axial direction of the outer cylinder portion 41 (axial direction of the first receiving portion 11) on the other side (casing 35 side) of the outer cylinder portion 41 in the axial direction. Is formed like this.

The inner cylinder portion 42 has substantially the same inner diameter as the flow path diameter of the first fluid flow path 21, and has substantially the same inner diameter as the inner diameter of the connecting body 15. The inner cylinder portion 42 communicates the first fluid flow path 21 with the internal space 48 of the connecting body 15 so that the first fluid device 1 and the connecting body 15 are fluidly connected by the first receiving portion 11. Is arranged between the first fluid device 1 and the connecting body 15.

An annular groove 46 is formed between the outer peripheral surface of the inner cylinder portion 42 and the inner peripheral surface of the outer cylinder portion 41 facing the outer peripheral surface. The groove portion 46 is formed so as to open in the projecting direction (second receiving portion 12 side) of the outer cylinder portion 41 and the inner cylinder portion 42 and over the entire circumference. Further, an inclined surface 47 is formed in the vicinity of the protruding end portion 44 of the inner cylinder portion 42. The inclined surface 47 is formed so that the diameter gradually increases from the first fluid flow path 21 side toward the protruding end portion 44 side of the inner cylinder portion 42.

In the present embodiment, the first receiving portion 11 is formed of a predetermined resin, for example, PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer), PVDF (polyvinylidene fluoride), ETFE (tetrafluoroethylene / ethylene). It is produced from a fluororesin such as polymer), FEP (tetrafluoroethylene / hexafluoropropylene copolymer) or PTFE (polytetrafluoroethylene). The resin is not limited to fluororesin, and may be other resin such as polypropylene (PP).

In the present embodiment, the second receiving portion 12 has a shape in which the first receiving portion 11 is inverted along the virtual central surface 68, and has substantially the same shape as the first receiving portion 11. , Is provided in the casing 55 of the second fluid device 2. Therefore, with respect to the second receiving portion 12, substantially the same components as the constituent elements of the first receiving portion 11 are designated by the same reference numerals, and the description thereof will be omitted. For convenience of explanation, even substantially the same components such as the first screw 23 and the second screw 26 may have different reference numerals.

The connecting body 15 has a first seal portion 31 and a second seal portion 32. Here, the first seal portion 31 seals between the connecting body 15 and the first receiving portion 11. The second sealing portion 32 seals between the connecting body 15 and the second receiving portion 12.

Specifically, the connecting body 15 is formed in a tubular shape. The connecting body 15 has a first portion 15a corresponding to the first receiving portion 11 and a second portion 15b corresponding to the second receiving portion 12 (see FIG. 2). The first portion 15a is composed of a cylindrical body having a substantially constant inner diameter, and includes a fluid flow path formed of a part of the internal space 48 of the connecting body 15. The fluid flow path of the first portion 15a is mounted on the first receiving portion 11 in a state of being fitted in the outer cylinder portion 41 so as to communicate with the first fluid flow path 21.

The first portion 15a includes a fitting portion 61, a protrusion 62, and a protrusion 63. The fitting portion 61 is formed in a cylindrical shape. When the first portion 15a is attached to the first receiving portion 11, the fitting portion 61 is fitted in a state of surrounding the outer cylinder portion 41 from the inside in the radial direction over the entire circumference. Then, a protrusion 62 and a protrusion 63 are formed at one end (on the side of the first fluid device 1) of both ends in the axial direction of the fitting portion 61, respectively.

The protrusion 62 and the protrusion 63 are each formed in an annular shape. When the first portion 15a is attached to the first receiving portion 11, the protrusion 62 is press-fitted into the groove portion 46 of the first receiving portion 11 over the entire circumference. Further, the protrusion 62 is inserted without contacting the side surface of the groove 46 formed in the first receiving portion 11 on the first fluid device 1 side.

The protrusion 63 is formed with a tapered surface 65 that gradually shrinks from the virtual central surface 68 side toward the first fluid device 1 side. The tapered surface 65 is arranged inward of the protrusion 62 in the radial direction of the first portion 15a. The tapered surface 65 is arranged so as to face the inclined surface 47 of the inner cylinder portion 42 in the axial direction of the first portion 15a. The tapered surface 65 is pressed against the inclined surface 47 of the inner cylinder portion 42 when the first portion 15a is attached to the first receiving portion 11.

In the present embodiment, the connecting body 15 has a shape orthogonal to the axial direction thereof and symmetrical with respect to the virtual central surface 68 located at the center of the connecting body 15 in the axial direction. That is, the first portion 15a and the second portion 15b have substantially the same shape. Therefore, with respect to the second portion 15b, substantially the same components as those of the first portion 15a in the drawing are designated by the same reference numerals, and the description thereof will be omitted.

In this embodiment, the connector 15 is made of a predetermined resin, for example, a fluororesin such as PFA, PVDF, ETFE, FEP or PTFE or other thermoplastic resin.

In the present embodiment, the connecting body 15 integrates the first portion 15a and the second portion 15b having substantially the same shape, but instead, the connecting body 15 has a different shape from each other. The first part and the second part may be connected.

In the present embodiment, the first tubular member 13 is configured to be able to surround the first receiving portion 11, specifically the outer tubular portion 41 thereof. The first tubular member 13 further has a third screw 28 screwed into the first screw 23 in addition to the first engaging portion 53. The third screw 28 is formed on the inner circumference of the first tubular member 13.

The second tubular member 14 is configured to surround the second receiving portion 12, specifically the outer tubular portion 41 thereof. The second tubular member 14 further has a fourth screw 29 screwed into the second screw 26 in addition to the second engaging portion 54. The fourth screw 29 is formed on the inner circumference of the second tubular member 14.

Specifically, the first tubular member 13 has a first main body portion 71 in addition to the first engaging portion 53.

The first main body portion 71 is fixed in a state of being fitted onto the first receiving portion 11. The first main body 71 is formed in a tubular shape. A third screw 28 is provided on the inner circumference of the first main body 71.

The first main body portion 71 is attached to the first socket portion 11 so as to surround the outer cylinder portion 41 of the first socket portion 11 over the entire circumference in a state where the third screw 28 is screwed into the first screw 23. It is attached. The first main body 71 is provided so as to extend in the axial direction of the first tubular member 13. The first main body 71 is arranged on the other side (first fluid device 1 side) in the axial direction of the first tubular member 13.

Further, the first engaging portion 53 is provided with a first engaging claw 72. The first engaging claw 72 is provided on the first main body 71 so that the first tubular member 13 projects in the axial direction and can bend in the radial direction with respect to the first main body 71.

The first engaging claw 72 of the first engaging portion 53 is arranged on one side (opposite side of the first fluid device 1) in the axial direction of the first tubular member 13. The first engaging claw 72 is formed so as to project from one end of the first main body 71 toward the second fluid device 2 which is one axial direction of the first tubular member 13. The first engaging claw 72 includes a first hook-shaped portion 73 on the protruding end (tip) side thereof.

One or a plurality of first engaging claws 72 are provided on the first tubular member 13. If one of the first engaging claws 72 is provided on the first tubular member 13, it has a tubular shape (C-shaped or the like) in which a part in the circumferential direction is cut out in order to ensure flexibility. It is formed in the above and is arranged coaxially with the first main body 71. If a plurality of first engaging claws 72 are provided on the first tubular member 13, they are arranged at predetermined intervals in the circumferential direction with respect to the first main body portion 71.

The first hook-shaped portion 73 includes a tapered portion 74. The tapered portion 74 is formed so that its diameter gradually decreases from the casing 35 side of the first fluid device 1 toward the second fluid device 2, which is one of the axial directions of the first tubular member 13. The first engaging claw 72 temporarily bends inward in the radial direction of the first tubular member 13 with respect to the first main body 71 when an external force equal to or greater than a predetermined value is applied to the first engaging claw 72. It is flexible so that it can be removed.

Further, the second tubular member 14 has a second main body portion 76 in addition to the second engaging portion 54.

The second main body portion 76 is fixed in a state of being fitted onto the second receiving portion 12. The second main body portion 76 is formed in a tubular shape. A fourth screw 29 is provided on the inner circumference of the second main body 76.

The second main body portion 76 has a second socket portion 12 so as to surround the outer cylinder portion 41 of the second socket portion 12 over the entire circumference in a state where the fourth screw 29 is screwed into the second screw 26. Attached to. The second main body portion 76 extends in the axial direction of the second tubular member 14, and is arranged on the other side (second fluid device 2 side) of the second tubular member 14 in the axial direction.

Further, the second engaging portion 54 includes a second engaging claw 77 that can be engaged with the first engaging claw 71. The second engaging claw 77 is provided on the second main body portion 76 so as to project in the axial direction of the second tubular member 14.

The second engaging claw 77 of the second engaging portion 54 is arranged on the other side in the axial direction (opposite side of the second fluid device 2) of the second tubular member 14. The second engaging claw 77 projects from one end of the second main body 76 toward the first fluid device 1 side, which is the other axial direction of the second tubular member 14, in the axial direction of the second main body 76. Is formed as follows. The second engaging claw 77 includes a second hook-shaped portion 78 on the protruding end (tip) side thereof.

One or more of the second engaging claws 77 are provided on the second tubular member 14. If one of the second engaging claws 77 is provided on the second tubular member 14, the second engaging claw 77 has a tubular shape (C-shaped or the like) in which a part in the circumferential direction is cut out in order to ensure flexibility. It is formed in the above and is arranged coaxially with the second main body portion 76. If a plurality of second engaging claws 77 are provided on the second tubular member 14, they are arranged at predetermined intervals in the circumferential direction with respect to the second main body portion 76.

The second hook-shaped portion 78 includes a tapered portion 79. The tapered portion 79 gradually shrinks from the second fluid device 2 side whose diameter is the other axial direction of the second tubular member 14 toward the first fluid device 1 side whose diameter is the other axial direction of the second tubular member 14. Is formed to do. The second engaging claw 77 surrounds the first engaging claw 72 from the side of the first fluid device 1 and has an inner diameter larger than the inner diameter of the second main body portion 76.

The second engaging portion 54 replaces the second engaging claw 77 with a claw receiver that can engage with the first engaging claw 72 (including a recess that can engage with the first engaging claw 72). May be provided. Further, the second engaging portion 54 may have a shape capable of engaging with the first main body portion 71 of the first tubular member 13.

Such a first tubular member 13 and a second tubular member 14 are fitted to each other with the first engaging claw 72 and the second engaging claw 77 facing each other. At this time, the first tubular member 13 is arranged coaxially with the second tubular member 14. The first tubular member 13 is arranged radially inward of the second tubular member 14 so that the first hook-shaped portion 73 faces the second hook-shaped portion 78 in the axial direction in the axial direction thereof.

In this way, the first engaging claw 72 and the second engaging claw 77 are engaged so as to prevent the first tubular member 13 and the second tubular member 14 from being separated from each other in a state of being fitted to each other. Will be done. Specifically, the first engaging claw 72 and the second engaging claw 77 are the first tubular member 13 and the second engaging claw 77 because the first hook-shaped portion 73 and the second hook-shaped portion 78 are caught by each other. The tubular member 14 is engaged in the axial direction.

The first tubular member 13 and the second tubular member 14 press-fit each protrusion 62 of the connecting body 15 into the corresponding groove portion 46, and correspond to the tapered surface 65 of each protrusion 63 of the connecting body 15. The first engaging claw 72 and the second engaging claw 77 are engaged with each other so as to be in pressure contact with the inclined surface 47 of the protruding end portion 44 of the tubular portion 42.

In the present embodiment, the first tubular member 13 is manufactured from a predetermined resin, for example, a fluororesin such as PFA, PVDF, ETFE, FEP or PTFE. Further, the second tubular member 14 is manufactured of a predetermined resin, for example, a fluororesin such as PFA, PVDF, ETFE, FEP or PTFE, like the first tubular member 13.

Here, when connecting the first fluid device 1 and the second fluid device 2, first, as shown in FIG. 3, the third screw 28 is screwed into the first screw 23, and the first receiving portion 11 The first tubular member 13 is detachably fixed to the surface. Further, the fourth screw 29 is screwed into the second screw 26 to detachably fix the second tubular member 14 to the second receiving portion 12. Then, the connecting body 15 is inserted into either the first receiving portion 11 or the second receiving portion 12. Then, as shown in FIG. 4, the first fluid device 1 and the second fluid device 2 that are separated from each other are opposed to each other, and the connecting body 15 is connected to the other of the first receiving portion 13 and the second receiving portion 14. Get closer to. While inserting the connecting body 15 into the other of the first receiving portion 13 and the second receiving portion 14, the first tubular member 13 and the second tubular member 14 are brought close to each other. After that, the first engaging claw 72 of the first tubular member 13 is temporarily bent inward in the radial direction of the first tubular member 13 to fit the first tubular member 13 into the second tubular member 14. After that, the first engaging claw 72 is engaged with the second engaging claw 77. In this way, the first tubular member 13 and the second tubular member 14 are fixed so as not to move relative to each other in the axial direction thereof.

By fixing the first tubular member 13 and the second tubular member 14, the first receiving portion 11 and the second receiving portion 12 are prevented from moving in a direction in which they are separated from each other, and the first fluid The state in which the device 1 and the second fluid device 2 are fluidly connected, that is, the state in which the first fluid flow path 21 and the second fluid flow path 25 are communicated with each other via the internal space 48 of the connecting body 15 is maintained. Will be done.

Further, with the engagement between the first engaging claw 72 and the second engaging claw 77, a seal is formed by the first sealing portion 31 and the second sealing portion 32. That is, each protrusion 62 of the connecting body 15 is press-fitted into the corresponding groove portion 46, and the tapered surface 65 of each protrusion 63 of the connecting body 15 is press-fitted to the inclined surface 47 of the corresponding protruding end portion 44 of the inner cylinder portion 42. Be made to.

Here, according to the first seal portion 31 and the second seal portion 32, a primary seal region 81 in which the seal force acts in the axial direction and a secondary seal region 82 in which the seal force acts in the radial direction are formed. NS. When the first engaging claw 72 of the first tubular member 13 is fitted into the second engaging claw 77 of the second tubular member 14, it is predetermined in addition to the manual work by the operator or the manual work by the operator. A fitting means such as a tool of the above is used.

Therefore, according to the fluid device connection structure according to the present embodiment, it is possible to prevent fluid leakage from the connection portion of the two fluid devices 1 and 2. Further, in order to fluidly connect the first fluid device 1 and the second fluid device 2, it is not necessary to interpose a member such as a tube between the first fluid device 1 and the second fluid device 2. Therefore, the two fluid devices 1 and 2 can be fluidly connected in a state of being as close as possible to each other, and the installation space of these fluid devices 1 and 2 can be saved.

Further, the connecting body 15 in the present embodiment has an overhanging portion 88. The overhanging portion 88 is arranged between the first receiving portion 11 and the second receiving portion 12 in a state where the first fluid device 1 and the second fluid device 2 are fluidly connected.

The overhanging portion 88 is sandwiched between the first receiving portion 11 and the second receiving portion 12 in a non-contact state. The overhanging portion 88 projects outward in the radial direction of the connecting body 15 and is formed in an annular shape.

The overhanging portion 88 has an outer diameter larger than the outer diameter of each of the protruding end portions 43 of the first receiving portion 11 and the second receiving portion 12. The overhanging portion 88 is provided on the virtual central surface 68 of the connecting body 15 and at an axially intermediate portion of the connecting body 15 (the boundary portion between the first portion 15a and the second portion 15b of the connecting body 15). Be done.

More specifically, the overhanging portion 88 is arranged so as to intervene between the protruding end portions 43 and 43 when the connecting body 15 is attached to the first receiving portion 11 and the second receiving portion 12. NS. The overhanging portion 88 faces the protruding end portion 43 of the first receiving portion 11 in the axial direction and faces the protruding end portion 43 of the first receiving portion 11 in the axial direction. The overhanging portion 88 facilitates the removal of the connecting body 15 from the first receiving portion 11 and the second receiving portion 12.

Hereinafter, the second to fifth embodiments of the present invention will be described with reference to FIGS. 5 to 8. In the drawings, the components substantially the same as the components of the connection structure of the fluid device according to the above-described first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted as appropriate.

FIG. 5 is a cross-sectional view of a connection structure of a fluid device according to a second embodiment of the present invention. As shown in the figure, the connection structure of the fluid device according to the present embodiment includes a configuration relating to a first seal portion 121 that seals between the first socket portion 111 and the connecting body 115, and a second socket portion. The configuration of the second seal portion 122 that seals between the 112 and the connecting body 115 is different from the connection structure of the fluid device according to the first embodiment described above.

The first receiving portion 111 is applied to the first fluid device 1, and is integrated with the casing 35 of the first fluid device 1 in the present embodiment. The first receiving portion 111 has a tubular portion 125 and an annular protrusion 126. The tubular portion 125 is made of a cylindrical body having a substantially constant inner diameter, and is provided so as to project toward the outside of the casing 35 in the vicinity of the periphery of the opening of the first fluid flow path 21 in the casing 35.

The tubular portion 125 is formed so that a part of the connecting body 115 can be fitted from the protruding end portion (one end in the axial direction) side. The tubular portion 125 is arranged with respect to a part of the connecting body 115 after fitting, except in the vicinity of the protruding end portion, with substantially no gap. Further, a first screw 23 is formed on the outer circumference of the tubular portion 125 along the axial direction of the tubular portion 125. The first screw 23 is composed of a male screw.

The annular protrusion 126 is formed of a ring-shaped body having an outer diameter smaller than the inner diameter of the tubular portion 125, and the protrusion direction of the tubular portion 125 (the axis of the tubular portion 125) is formed in the vicinity of the periphery of the opening of the first fluid flow path 21 in the casing 35. It is provided so as to project in the same direction as (one of the directions). The annular protrusion 126 is arranged inward in the radial direction of the tubular portion 125 at a predetermined interval, and extends in the same direction as the tubular portion 125.

The annular projection 126 has an inner diameter substantially the same as the flow path diameter of the first fluid flow path 21, and has an inner diameter substantially the same as the inner diameter of the connecting body 115. The annular projection 126 is arranged between the first fluid device 1 and the connecting body 115, and communicates the first fluid flow path 21 with the internal space 138 of the connecting body 115. The first fluid device 1 and the connecting body 115 are fluidly (so that the fluid can flow inside) are connected by the first receiving portion 111.

The outer peripheral surface of the annular projection 126 includes a tapered surface 128. The tapered surface 128 is formed so that its outer diameter gradually decreases in the axial direction toward the projecting direction of the annular projection 126 (one of the axial directions of the first receiving portion 111). The tapered surface 128 extends over the entire circumference of the annular projection 126, and the tapered surface 128 and the inner peripheral surface of the tubular portion 125 facing the tapered surface 128 are arranged at predetermined intervals.

The second receiving portion 112 has substantially the same shape as the first receiving portion 111 in the present embodiment. Therefore, with respect to the second receiving portion 112, substantially the same components as the constituent elements of the first receiving portion 111 are designated by the same reference numerals, and the description thereof will be omitted. For convenience of explanation, even substantially the same components such as the first screw 23 and the second screw 26 may have different reference numerals.

The connecting body 115 has a first portion 115a corresponding to the first receiving portion 111 and a second portion 115b corresponding to the second receiving portion 112. The first portion 115a is made of a cylindrical body having a substantially constant inner diameter, and includes a fluid flow path. The fluid flow path of the first portion 115a is formed from the internal space corresponding to the first portion 115a in the connecting body 115. The fluid flow path of the first portion 115a is mounted on the first receiving portion 111 in a state of being fitted in the tubular portion 125 so as to communicate with the first fluid flow path 21.

The first portion 115a includes a fitting portion 131 and a protruding portion 132. The fitting portion 131 is formed in a cylindrical shape. The fitting portion 131 is internally fitted into the tubular portion 125 when the first portion 115a is attached to the first receiving portion 111. Then, the protruding portion 132 projects in the axial direction to one end of the axially both ends of the fitting portion 131 in the first portion 115a (the first fluid device 1 side of the fitting portion 131). Is formed in.

The protrusion 132 is formed in an annular shape. When the first portion 115a is attached to the first receiving portion 111, the protruding portion 132 has an inclined surface 135 formed on the inner peripheral side of the protruding portion 132 with respect to the tapered surface 128 of the annular projection 126. Press contact. The inclined surface 135 is formed so as to gradually expand in the projecting direction (first fluid device 1 side) of the projecting portion 132. The inclined surface 135 faces the protruding portion 132 and extends over the entire circumference of the protruding portion 132.

The connecting body 115 according to the present embodiment has a shape orthogonal to the axial direction thereof and symmetrical with respect to the virtual central surface 148 located at the center of the connecting body 115 in the axial direction. That is, the first portion 115a and the second portion 115b have substantially the same shape.

With such a fluid device connection structure, the installation space of the first fluid device 1 and the second fluid device 2 that are fluidly connected to each other can be saved as in the fluid device connection structure according to the first embodiment described above. Space can be achieved. Further, when the first fluid device 1 and the second fluid device 2 are connected, the connecting body 115 forms the first seal portion 121 and the second seal portion 122. Then, the inclined surface 135 of the first portion 115a of the connecting body 115 is pressed against the tapered surface 128 of the first receiving portion 111, and the inclined surface 135 of the second portion 115b is tapered at the second receiving portion 112. It is pressed against the surface 128.

Therefore, it is possible to prevent fluid from leaking from the connection portion between the first fluid device 1 and the second fluid device 2, and the first fluid device 1 and the second fluid device 2 can be connected to each other without using a conventional member such as a tube. It is possible to connect in a short distance.

FIG. 6 is a cross-sectional view of a connection structure of a fluid device according to a third embodiment of the present invention. As shown in the figure, the connection structure of the fluid device according to the present embodiment includes a configuration relating to a first seal portion 161 that seals between the first socket portion 151 and the connecting body 155, and a second socket portion. The configuration of the second seal portion 162 that seals between the 152 and the connecting body 155 is different from the connection structure of the fluid device according to the first embodiment described above.

The first receiving portion 151 is applied to the first fluid device 1, and is integrated with the casing 35 of the first fluid device 1 in the present embodiment. A first screw 23 is formed on the outer periphery of the first receiving portion 151 along the axial direction of the first receiving portion 151. The first screw 23 is composed of a male screw.

The first receiving portion 151 has a tubular portion 165 and a protruding portion 166. The tubular portion 165 is formed of a cylindrical body having a step on the inner circumference, and is provided so as to project in a direction away from the casing 35. The tubular portion 165 is provided in the vicinity of the opening of the first fluid flow path 21 formed in the casing 35.

The tubular portion 165 has a first tubular portion 165a on one side in the axial direction (the opening side of the first receiving portion 151) with respect to the step portion 167. The first tubular portion 165a is formed so that a part of the connecting body 155 can be fitted. The first tubular portion 165a is arranged without a gap in a general area with respect to a part of the connecting body 155 after fitting.

The tubular portion 165 has a second tubular portion 165b on the other side (first fluid device 1 side) in the axial direction from the step portion 167. The second tubular portion 165b has substantially the same inner diameter as the flow path diameter of the first fluid flow path 21, and has substantially the same inner diameter as the inner diameter of the connecting body 115. The second tubular portion 165b communicates the first fluid flow path 21 with the internal space 178 of the connecting body 155 so that the first fluid device 1 and the connecting body 155 are fluidly connected by the first receiving portion 151. It is arranged between the first fluid device 1 and the connecting body 155 so as to be allowed to do so.

The projecting portion 166 is made of an annular body and is provided so as to project from the first tubular portion 165a to one side in the axial direction of the tubular portion 165. An inclined surface 168 is formed on the inner peripheral side of the protruding portion 166. The inclined surface 168 is formed so that its diameter gradually expands from the tubular portion 165 side toward the protruding end portion side of the protruding portion 166 (the opening side of the first receiving portion 151). The inclined surface 168 extends over the entire circumference of the protrusion 166.

The second receiving portion 152 according to the present embodiment has a shape in which the first receiving portion 151 is inverted on the virtual central surface 198, and has substantially the same shape as the first receiving portion 151.

The connecting body 155 has a first portion 155a corresponding to the first receiving portion 151 and a second portion 155b corresponding to the second receiving portion 152. The first portion 155a comprises a cylindrical body having a substantially constant inner diameter and includes a fluid flow path. The fluid flow path of the first portion 155a is formed from the internal space corresponding to the first portion 155a in the connecting body 155. The first portion 155a is fitted into the tubular portion 165 and attached to the first receiving portion 151, so that the internal space 178 as the fluid flow path is connected to the first fluid flow path 21.

A fitting portion 171 and a protruding portion 172 are formed in the first portion 155a. The fitting portion 171 is formed in a cylindrical shape. When the first portion 155a is attached to the first receiving portion 151, the fitting portion 171 is fitted to the tubular portion 165 in a state of being surrounded over the entire circumference. A protruding portion 172 is provided at the end of the fitting portion 171 of the first portion 155a (an axially intermediate portion of the connecting body 15) so as to project outward in the radial direction of the connecting body 155.

The protrusion 172 is formed in an annular shape. When the first portion 155a is attached to the first receiving portion 151, the protruding portion 172 presses the tapered surface 175, which is the outer peripheral surface of the protruding portion 172, with the inclined surface 168 of the protruding portion 166. The tapered surface 175 is formed so that its diameter gradually expands from the tubular portion 165 side toward the outer side in the radial direction. The tapered surface 175 extends over the entire circumference of the protrusion 172.

The connecting body 155 according to the present embodiment has a shape orthogonal to the axial direction thereof and symmetrical with respect to the virtual central surface 198 located at the center of the connecting body 155 in the axial direction. That is, the first portion 155a and the second portion 155b have substantially the same shape.

With such a configuration, when the first fluid device 1 and the second fluid device 2 are connected, the connecting body 155 forms the first seal portion 161 and the second seal portion 162. Then, the tapered surface 175 of the first portion 155a of the connecting body 155 is pressed against the inclined surface 168 of the first receiving portion 151, and the tapered surface 175 of the second portion 155b is inclined at the second receiving portion 152. It is pressed against the surface 168. As a result, it is possible to prevent the fluid from leaking from the connection portion between the first fluid device 1 and the second fluid device 2, and the first fluid device 1 and the second fluid device 2 can be connected to each other without using a conventional member such as a tube. It is possible to connect to a short distance.

Therefore, similarly to the connection structure of the fluid devices according to the first embodiment, it is possible to save the installation space of the first fluid device 1 and the second fluid device 2 which are fluidly connected to each other.

FIG. 7 is a cross-sectional view of the connection structure of the fluid device according to the fourth embodiment of the present invention. As shown in the figure, the connection structure of the fluid device according to the present embodiment includes a configuration relating to a first seal portion 221 that seals between the first socket portion 211 and the connecting body 215, and a second socket portion. The configuration of the second seal portion 222 that seals between the 212 and the connecting body 215 is different from the connection structure of the fluid device according to the first embodiment described above.

In the present embodiment, the first receiving portion 211 is applied to the first fluid device 1, and in the present embodiment, the first receiving portion 211 is integrated with the casing 35 of the first fluid device 1. The first receiving portion 211 has an outer cylinder portion 225 and an inner cylinder portion 226. The outer cylinder portion 225 is made of a cylindrical body having a substantially constant inner diameter, projects toward the outside of the casing 35, and is provided in the vicinity of the first fluid flow path 21 in the casing 35.

The outer cylinder portion 225 is formed so that a part of the connecting body 215 can be fitted from the protruding end portion (one end in the axial direction) side. The outer cylinder portion 225 is arranged with substantially no gap with respect to a part of the connecting body 215 after fitting. Further, a first screw 23 is formed on the outer circumference of the outer cylinder portion 225 along the axial direction of the outer cylinder portion 225. The first screw 23 is composed of a male screw.

The inner cylinder portion 226 is a cylindrical body having a substantially constant outer diameter smaller than the inner diameter of the outer cylinder portion 225. The inner cylinder portion 226 protrudes in the same direction as the protrusion direction of the outer cylinder portion 225 (one of the axial directions of the first receiving portion 211), and is provided in the vicinity of the first fluid flow path 21 in the casing 35. The inner cylinder portion 226 is arranged inward in the radial direction so as to be separated from the outer cylinder portion 225 by a predetermined interval, and extends in the same direction as the outer cylinder portion 225.

Here, the inner cylinder portion 226 is positioned so that the protruding end portion thereof is located on the protruding direction side (the direction away from the first fluid device 1 and the second fluid device 2) with respect to the protruding end portion of the outer cylinder portion 225, that is. It is provided so as to protrude from the casing 35 with respect to the outer cylinder portion 225. In this way, the first receiving portion 211 is formed so as to exhibit a double tubular shape in the axial direction of the outer cylinder portion 225 in the axial direction of the outer cylinder portion 225 (axial direction of the first receiving portion 211). ..

The inner cylinder portion 226 has an inner diameter substantially the same as the inner diameter of the flow path of the first fluid flow path 21, and has an inner diameter substantially the same as the inner diameter of the connecting body 215. The inner cylinder portion 226 is arranged between the first fluid device 1 and the connecting body 215, and communicates the first fluid flow path 21 with the internal space of the connecting body 215. The first fluid device 1 and the connecting body 215 are fluidly connected by the first receiving portion 211.

The protruding end of the inner cylinder 226 is formed in a tapered shape in the protruding direction of the inner cylinder 226. A tapered surface 228 is formed on the outer peripheral surface of the protruding end of the inner cylinder portion 226. The tapered surface 228 is formed so that its diameter gradually decreases toward the virtual central surface 248, which is the protruding direction of the inner cylinder portion 226 (one of the axial directions of the first receiving portion 211). The tapered surface 228 extends over the entire circumference of the protruding end of the inner cylinder 226.

In the present embodiment, the second receiving portion 212 has substantially the same shape as the first receiving portion 211.

The connecting body 215 has a first portion 215a corresponding to the first receiving portion 211 and a second portion 215b corresponding to the second receiving portion 212. The first portion 215a is made of a cylindrical body and includes a fluid flow path. The fluid flow path of the first portion 215a is formed from the internal space corresponding to the first portion 215a in the connecting body 215. The first portion 215a is mounted on the first receiving portion 211 in a state of being fitted to the inner cylinder portion 226, so that the fluid flow path of the first portion 215a is connected to the first fluid flow path 21. NS.

The first portion 215a includes a fitting portion 231 and a protruding portion 232. The fitting portion 231 is formed in a cylindrical shape. The fitting portion 231 is externally fitted to the inner cylinder portion 226 when the first portion 215a is attached to the first receiving portion 211. Then, at one end of the fitting portion 231 in the axial direction (the middle portion of the connecting body 215), the protruding portion 232 is provided so as to project inward in the radial direction of the connecting body 215.

The protrusion 232 is formed in an annular shape. When the first portion 215a is attached to the first receiving portion 211, the protruding portion 232 presses the inclined surface 235 on the inner peripheral surface of the protruding portion 232 with the tapered surface 228 of the inner cylinder portion 226. The inclined surface 235 is formed so that its diameter gradually expands from the virtual central surface 248 toward the first fluid device 1 or the second fluid device 2. The inclined surface 235 extends over the entire circumference of the protrusion 232.

In the present embodiment, the connecting body 215 has a shape orthogonal to the axial direction thereof and symmetrical with respect to the central surface 248 located at the center of the connecting body 215 in the axial direction. That is, the first portion 215a and the second portion 215b have substantially the same shape.

With such a connection structure of the fluid device, when the first fluid device 1 and the second fluid device 2 are connected, the connecting body 215 forms the first seal portion 221 and the second seal portion 222. Then, the inclined surface 235 of the first portion 215a of the connecting body 215 is pressed against the tapered surface 228 of the first receiving portion 211, and the inclined surface 235 of the second portion 215b is tapered at the second receiving portion 212. It is pressed against the surface 228. As a result, it is possible to prevent fluid from leaking from the connection portion between the first fluid device 1 and the second fluid device 2, and the first fluid device 1 and the second fluid device 2 can be connected to each other without using a conventional member such as a tube. It is possible to connect to a short distance.

Therefore, similarly to the connection structure of the fluid devices according to the first embodiment, it is possible to save the installation space of the first fluid device 1 and the second fluid device 2 which are fluidly connected to each other.

Next, a fifth embodiment of the present invention will be described.

FIG. 8 is a cross-sectional view of the connection structure of the fluid device according to the fifth embodiment of the present invention. FIG. 9 shows a portion of the first engaging portion 53 of the first tubular member 263 and the second engaging portion 54 of the second tubular member 264 viewed from the first fluid device 1 side in FIG. It is a cross-sectional view. FIG. 10 is a diagram showing a state in which the two fluid devices 1 and 2 are in the process of being connected in the connection structure of the fluid devices of FIG.

FIG. 11 is a partial cross-sectional view of the vicinity of the first engaging portion 53 of the first tubular member 263 and the vicinity of the second engaging portion of the second tubular member 264 as viewed from the first fluid device 1 side in FIG. .. In the drawings, the components substantially the same as the components of the connection structure of the fluid device according to the above-described first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted as appropriate.

As shown in FIGS. 8 to 11, in the connection structure of the fluid device according to the present embodiment, the first tubular member 263 and the second tubular member 264 are the connection structures of the fluid device according to the above-described first embodiment. Is different from.

In the present embodiment, the first tubular member 263 has a third main body portion 271 in addition to the first engaging portion 53. The third main body 271 is formed in a tubular shape. A third screw 28 is provided on the inner circumference of the third main body 271. The first engaging portion 53 includes a first protruding portion 272 and a recessed portion 273. The first protruding portion 272 projects in the axial direction of the first tubular member 263 and is provided on the third main body portion 271. The recess 273 is provided on the outer periphery of the first protrusion 272 so as to open toward the first fluid device 1 side.

Specifically, the third main body portion 271 receives the first receiver so as to surround the outer cylinder portion 41 of the first receiving portion 11 over the entire circumference in a state where the third screw 28 is screwed into the first screw 23. It is attached to the mouth portion 11. The third main body 271 is provided so as to extend in the axial direction of the first tubular member 263. The third main body 271 is arranged on the other side in the axial direction (first fluid device 1 side) of the first tubular member 263.

The first protruding portion 272 is arranged on one side in the axial direction (opposite side of the first fluid device 1) with respect to the first tubular member 263. The first protruding portion 272 projects from one end of the third main body 271 in the axial direction of the first tubular member 263 in the axial direction of the third main body 271. The first protruding portion 272 is formed in a tubular shape.

The concave portion 273 of the first engaging portion 53 is provided on the protruding end portion (tip portion) side of the first protruding portion 272. The concave portion 273 projects outward in the radial direction of the first protruding portion 272 to the outer periphery of the first protruding portion 272. At least one recess 273 (two in this embodiment) is provided in the first engaging portion 53. The recesses 273 are provided at predetermined intervals in the circumferential direction of the first protruding portion 272 (first tubular member 263).

Each recess 273 has a first extending portion 276 and two first protruding portions 277.278. The first extending portion 276 is provided so as to extend along the circumferential direction of the first protruding portion 272. The first extending portion 276 in one recess 273 is arranged at substantially the same position as the first extending portion 276 in the other recess 273 in the axial direction of the first tubular member 263.

The two first protruding portions 277 and 278 project from both sides of the first extending portion 276 in the extending direction toward the third main body portion 271 side (the other side in the axial direction of the first tubular member 263), respectively. .. The two first protrusions 277 and 278 are arranged with a predetermined circumferential width in the circumferential direction of the first protrusion 272. The shapes of the two first protrusions 277 and 278 may be different from each other.

The second tubular member 264 has a fourth main body portion 281 in addition to the second engaging portion 54. The fourth main body portion 281 is formed in a tubular shape. A fourth screw 29 is provided on the inner circumference of the fourth main body 281. The second engaging portion 54 includes a second protruding portion 282 and a convex portion 283. The second protruding portion 282 is provided on the fourth main body portion 281 so as to project in the axial direction of the second tubular member 264.

The convex portion 283 is provided on the inner circumference of the second protruding portion 282. Instead of the configuration adopted in the present embodiment, the first engaging portion 53 is provided with a convex portion corresponding to the convex portion 283 on the outer periphery of the first protruding portion 272, and the second engaging portion 54 is provided with a concave portion 273. It is also possible to adopt a configuration in which a recess corresponding to the above is provided on the inner circumference of the second protruding portion 282.

Specifically, the fourth main body portion 281 has a second receiver so as to surround the outer cylinder portion 41 of the second socket portion 12 over the entire circumference in a state where the fourth screw 29 is screwed into the second screw 26. It is attached to the mouth portion 12. The fourth main body portion 281 extends in the axial direction of the second tubular member 264. The fourth main body portion 281 is arranged on the other side in the axial direction (second fluid device 2 side) of the second tubular member 264.

The second protruding portion 282 is arranged on one side in the axial direction (opposite side of the second fluid device 2) of the second tubular member 264. The second protruding portion 282 projects from one end of the fourth main body 281 in the axial direction of the second tubular member 264 in the axial direction of the fourth main body 281. The second protruding portion 282 is formed in a tubular shape and is arranged coaxially with the fourth main body portion 281.

The convex portion 283 of the second engaging portion 54 is provided on the protruding end portion (tip portion) side of the second protruding portion 282. The convex portion 283 is arranged on the inner circumference of the second protruding portion 282 in a state of protruding inward in the radial direction of the second protruding portion 282. At least one convex portion 283 (two in the present embodiment) is provided in the second engaging portion 54, and the circumferential direction of the second protruding portion 282 (second tubular member 264) is provided according to the concave portion 273. Is provided at predetermined intervals.

Each convex portion 283 has a second extending portion 286 and a second protruding portion 287. The first extending portion 276 extends linearly in the circumferential direction of the first protruding portion 272. The second extending portion 286 has a circumferential width larger than the circumferential width (circumferential length) of the second protruding portion 287. The second protruding portion 287 projects from the second extending portion 286 toward the fourth main body portion 281 side (the other side in the axial direction of the second tubular member 264).

The protruding end of the second protruding portion 287 in each convex portion 283 is arranged at substantially the same position as the protruding end with the first extending portion 276 in the other convex portion 283 in the axial direction of the second tubular member 264. .. The second protrusion 287 is formed so as to be insertable between the two first protrusions 277 and 278, and the two first protrusions 277. They are arranged at a predetermined interval from 278.

Such a first tubular member 263 and a second tubular member 264 are fitted so as to be relatively rotatable with respect to each other so that the first protruding portion 272 and the second protruding portion 282 face each other. At this time, a part of the first tubular member 263 is located inward in the radial direction of the second tubular member 264. The first tubular member 263 is fitted into the second tubular member 264 from the first fluid device 1 side while passing the convex portion 283 between the concave portions 273, and then rotated with respect to the second tubular member 264. Be done.

In this way, the concave portion 273 and the convex portion 283 are engaged so as to prevent the first tubular member 263 and the second tubular member 264, which are in a state of being fitted to each other, from being separated from each other. Specifically, the concave portion 273 and the convex portion 283 have a first tubular member 263 and a second tubular shape so that the second protruding portion 287 contacts the first extending portion 276 from the first fluid device 1 side. Engage in the axial direction of member 264.

The concave portion 273 and the convex portion 283 are engaged with each other to form the first seal portion 31 and the second seal portion 32. That is, the concave portion 273 and the convex portion 283 press-fit each protrusion 62 of the connecting body 15 into the corresponding groove portion 46, and the protruding end of the inner cylinder portion 42 corresponding to the tapered surface 65 of each protrusion 63 of the connecting body 15. It is pressed against the inclined surface 47 of the portion 44.

In the present embodiment, the first tubular member 263 is manufactured from a predetermined resin, for example, a fluororesin such as PFA, PVDF, ETFE, FEP or PTFE. Further, the second tubular member 264 is manufactured of a predetermined resin, for example, a fluororesin such as PFA, PVDF, ETFE, FEP or PTFE, like the first tubular member 263.

In the above configuration, as shown in FIG. 11, the first tubular member 263 shifts the position of the concave portion 273 with respect to the convex portion 283 in the circumferential direction of the second tubular member 264 to form the second tubular member. It is fitted into the member 264 in a state in which the axial directions of the members are aligned with each other, and then is rotated with respect to the second tubular member 264 in the direction of arrow 290. In this way, the concave portion 273 engages with the convex portion 283 (see FIG. 9).

Therefore, the first tubular member 263 and the second tubular member 264 are fixed so as not to move relative to each other in the axial direction thereof. As a result, the first receiving portion 11 and the second receiving portion 12 are prevented from moving in a direction in which they are separated from each other. Therefore, the state in which the first fluid device 1 and the second fluid device 2 are fluidly connected is maintained.

Further, the first seal portion 31 and the second seal portion 32 are formed by engaging the concave portion 273 with the corresponding convex portion 283. That is, each protrusion 62 of the connecting body 15 is press-fitted into the corresponding groove portion 46, and the tapered surface 65 of each protrusion 63 of the connecting body 15 is press-fitted to the inclined surface 47 of the corresponding protruding end portion 44 of the inner cylinder portion 42. Will be done.

Therefore, according to the fluid device connection structure according to the present embodiment, in order to fluidly connect the first fluid device 1 and the second fluid device 2, conventionally, the first fluid device 1 and the second fluid device 2 are used. It is not necessary to use a member such as a tube that needs to be interposed between the and. Therefore, the two fluid devices 1 and 2 can be fluidly connected in a state of being as close as possible to each other, and the installation space of these fluid devices 1 and 2 can be saved. In addition, it is possible to prevent fluid leakage from the connection portion of the two fluid devices 1 and 2.

In the present embodiment, in the circumferential direction of the first tubular member 263 and the second tubular member 264, the circumferential width of the second protrusion 287 of the convex portion 283 of the second tubular member 264 is set to the first cylinder. It is preferable to set the width in the circumferential direction of the two first protrusions 277 and 278 of the recess 273 in the shape member 263 to be substantially the same. According to this, it is possible to suppress the occurrence of rattling between the first tubular member 263 and the second tubular member 264.

Next, a sixth embodiment of the present invention will be described.

FIG. 12 is a cross-sectional view of the connection structure of the fluid device according to the sixth embodiment of the present invention. FIG. 13 is a perspective view of the first tubular member 313 or the second tubular member 314. FIG. 14 is a front view of the first tubular member 313 or the second tubular member 314. In the drawings, the components substantially the same as the components of the connection structure of the fluid device according to the above-described first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted as appropriate.

As shown in FIGS. 12 to 14, in the connection structure of the fluid device according to the present embodiment, the first tubular member 313 and the second tubular member 314 are the connection structure of the fluid device according to the above-described first embodiment. Is different from.

In the present embodiment, the first tubular member 313 has a fifth main body portion 321 in addition to the first engaging portion 53. The fifth main body portion 321 is formed in a tubular shape. A third screw 28 is provided on the inner circumference of the fifth main body portion 321. The first engaging portion 53 includes a third protruding portion 322, a third engaging claw 323, and a first claw receiving portion 324.

The third protruding portion 322 is provided on the fifth main body portion 321 so as to project in the axial direction of the first tubular member 313. The third engaging claw 323 is provided on the third protruding portion 322 so as to project in the axial direction of the first tubular member 313. The first claw receiving portion 324 is provided on the third protruding portion 322 in the circumferential direction of the first tubular member 313. The first passage 325 is formed between the third engaging claws 323 in the circumferential direction of the first tubular member 313.

Specifically, the fifth main body portion 321 receives the first receiver so as to surround the outer cylinder portion 41 of the first receiving portion 11 over the entire circumference in a state where the third screw 28 is screwed into the first screw 23. It is attached to the mouth portion 11. That is, the fifth main body portion 321 is provided so as to extend in the axial direction of the first tubular member 313. The fifth main body portion 321 is arranged on the other side in the axial direction (first fluid device 1 side) of the first tubular member 313.

The third protruding portion 322 of the first engaging portion 53 is arranged on one side in the axial direction (opposite side of the first fluid device 1) of the first tubular member 313. The third protruding portion 322 projects from one end of the fifth main body 321 in the axial direction of the first tubular member 313 in the axial direction of the fifth main body 321. The third protruding portion 322 is formed in a tubular shape and is located coaxially with the fifth main body portion 321.

The third engaging claw 323 of the first engaging portion 53 is provided at the protruding end portion (tip portion) of the third protruding portion 322. The third engaging claw 323 is provided so as to project from one end of the third protruding portion 322 in the axial direction of the first tubular member 313 in the axial direction of the third protruding portion 322. The third engaging claw 323 is provided with a third hook-shaped portion on the protruding end (tip) side thereof.

At least one (four in this embodiment) of the third engaging claws 323 is provided on the first engaging portion 53, and the third engaging claws 323 are predetermined in the circumferential direction of the third protruding portion 322 (first tubular member 313). It is provided at every interval. The third engaging claw 323 and the connecting portion connected to the third engaging claw 323 in the axial direction of the first tubular member 313 are formed on the third protruding portion 322 rather than the outer peripheral surface of the third protruding portion 322. Arranged inward in the radial direction.

The first claw receiving portion 324 of the first engaging portion 53 is provided at the protruding end portion (tip portion) of the third protruding portion 322. The first claw receiving portion 324 is arranged so as to extend along the circumferential direction of the third protruding portion 322. The first claw receiving portion 324 is provided on the inner circumference of the third protruding portion 322, and has a shape protruding inward in the radial direction of the third protruding portion 322 so that it can engage with the third engaging claw 323. Have.

The first claw receiving portion 324 is arranged so as to line up with the first passage 325 between the adjacent third engaging claws 323 in the circumferential direction of the third protruding portion 322. The first passage 325 has a wall surface located at the protruding end of the third protruding portion 322, which is located radially outward of the third protruding portion 322 with respect to the first claw receiving portion 324, and the third engaging claw 323. It is formed so as to open in the protruding direction of.

In the present embodiment, the second tubular member 314 has the same shape as the first tubular member 313. The second tubular member 314 is not limited to this, and may have a shape different from that of the first tubular member 313.

The second tubular member 314 has a sixth main body portion 331 in addition to the second engaging portion 54. The sixth main body portion 331 is formed in a tubular shape. A fourth screw 29 is provided on the inner circumference of the sixth main body 331. The second engaging portion 54 includes a fourth protruding portion 332, a fourth engaging claw 333, and a second claw receiving portion 334.

The fourth protruding portion 332 is provided on the sixth main body portion 331 so as to project in the axial direction of the second tubular member 314. The fourth engaging claw 333 is provided on the fourth protruding portion 332 so as to project in the axial direction of the second tubular member 314. The second claw receiving portion 334 is provided on the fourth protruding portion 332 in the circumferential direction of the second tubular member 314. The second passage 335 is formed between the fourth engaging claws 333 in the circumferential direction of the second tubular member 314.

Specifically, the sixth main body portion 331 is in a state where the fourth screw 29 is screwed into the second screw 26, and the second receiving portion 331 surrounds the outer cylinder portion 41 of the second receiving portion 12 over the entire circumference thereof. It is attached to the mouth portion 12. That is, the sixth main body portion 331 is provided so as to extend in the axial direction of the second tubular member 314. The sixth main body portion 331 is arranged on the other side in the axial direction (second fluid device 2 side) of the second tubular member 314.

The fourth protruding portion 332 of the second engaging portion 54 is arranged on one side in the axial direction (opposite side of the second fluid device 2) of the second tubular member 314. The fourth protruding portion 332 is provided so as to project from one end of the sixth main body 331 in the axial direction of the second tubular member 314 in the axial direction of the sixth main body 331. The fourth protruding portion 332 is formed in a tubular shape and is located coaxially with the sixth main body portion 331.

The fourth engaging claw 333 of the second engaging portion 54 is provided at the protruding end portion (tip portion) of the fourth protruding portion 332. The fourth engaging claw 333 is provided so as to project from one end of the fourth protruding portion 332 in the axial direction of the second tubular member 314 in the axial direction of the fourth protruding portion 332. The fourth engaging claw 333 is provided with a fourth hook-shaped portion on the protruding end (tip) side thereof.

At least one (two in this embodiment) of the fourth engaging claw 333 is provided on the second engaging portion 54, and the fourth engaging claw 333 is predetermined in the circumferential direction of the fourth protruding portion 332 (second tubular member 314). It is provided at every interval. The fourth engaging claw 333 and the continuous portion 336 continuous with the fourth engaging claw 333 are arranged radially inward of the fourth protruding portion 332 with respect to the outer peripheral surface of the fourth protruding portion 332.

The second claw receiving portion 334 of the second engaging portion 54 is provided at the protruding end portion (tip portion) of the fourth protruding portion 332. The second claw receiving portion 334 is arranged so as to extend in the circumferential direction of the fourth protruding portion 332. The second claw receiving portion 334 is provided on the inner circumference of the fourth protruding portion 332, and has a shape protruding inward in the radial direction of the fourth protruding portion 332 so as to be engaged with the fourth engaging claw 333. Have.

The second claw receiving portion 334 is arranged so as to line up with the second passage 335 between the adjacent fourth engaging claws 333 in the circumferential direction of the fourth protruding portion 332. The second passage 335 has a wall surface located at the protruding end of the fourth protruding portion 332, which is located radially outward of the fourth protruding portion 332 with respect to the second claw receiving portion 334, and has a wall surface of the fourth engaging claw 333. It is formed so as to open in the protruding direction.

Such a first tubular member 313 and a second tubular member 314 are fitted so as to be relatively rotatable with respect to each other so that the third protruding portion 322 and the fourth protruding portion 332 face each other. At this time, the first tubular member 313 passes the third engaging claw 323 through the second passage 335 and passes the fourth engaging claw 333 to the first so as to be located inward in the radial direction of the second tubular member 314. It is fitted into the second tubular member 314 while passing through the passage 325, and then rotated with respect to the second tubular member 314.

In this way, the third engaging claw 323 and the second claw receiving portion 334 are engaged so as to prevent the first tubular member 313 and the second tubular member 314 that are fitted to each other from being separated from each other. At the same time, the fourth engaging claw 333 and the first claw receiving portion 324 are engaged. Specifically, the third engaging claw 323 and the second claw receiving portion 334, and the fourth engaging claw 333 and the first claw receiving portion 324 are the first tubular member 313 and the second tubular member 314. Axial engaged.

The first seal portion 31 and the second seal portion 32 are formed when the third engaging claw 323 and the second claw receiving portion 334 are engaged with each other. That is, the third engaging claw 323 and the second claw receiving portion 334 press-fit each protrusion 62 of the connecting body 15 into the corresponding groove portion 46, and correspond to the tapered surface 65 of each protrusion 63 of the connecting body 15. It is configured to be in pressure contact with the inclined surface 47 of the protruding end portion 44 of the inner cylinder portion 42.

Further, the first seal portion 31 and the second seal portion 32 are formed when the fourth engaging claw 333 and the first claw receiving portion 324 are engaged with each other. That is, the fourth engaging claw 333 and the first claw receiving portion 324 press-fit each protrusion 62 of the connecting body 15 into the corresponding groove portion 46, and correspond to the tapered surface 65 of each protrusion 63 of the connecting body 15. It is configured to be in pressure contact with the inclined surface 47 of the protruding end portion 44 of the inner cylinder portion 42.

In the present embodiment, the first tubular member 313 is manufactured from a predetermined resin, for example, a fluororesin such as PFA, PVDF, ETFE, FEP or PTFE. Further, the second tubular member 314 is manufactured of a predetermined resin, for example, a fluororesin such as PFA, PVDF, ETFE, FEP or PTFE, like the first tubular member 313.

In the above configuration, the first tubular member 313 and the second tubular member 314 pass the third engaging claw 323 through the second passage 335 and the fourth engaging claw 333 through the first passage 325. They are fitted together in a state where their axial directions are aligned with each other, and then they are rotated relative to each other. In this way, the third engaging claw 323 and the second claw receiving portion 334 are engaged, and the fourth engaging claw 333 and the first claw receiving portion 324 are engaged.

Therefore, the first tubular member 313 and the second tubular member 314 are fixed so as not to move relative to each other in the axial direction thereof. As a result, the movement of the first receiving portion 11 and the second receiving portion 12 in the direction in which they are separated from each other is prevented, and the first fluid device 1 and the second fluid device 2 are fluidly connected. The state is maintained.

Further, with the engagement of the third engaging claw 323 and the second claw receiving portion 334 and the engagement of the fourth engaging claw 333 and the first claw receiving portion 324, the first seal portion 31 and the first seal portion 31 and the first 2 Seal portion 32 is formed. That is, each protrusion 62 of the connecting body 15 is press-fitted into the corresponding groove portion 46, and the tapered surface 65 of each protrusion 63 of the connecting body 15 is press-fitted to the inclined surface 47 of the corresponding protruding end portion 44 of the inner cylinder portion 42. Will be done.

Therefore, according to the fluid device connection structure according to the present embodiment, in order to fluidly connect the first fluid device 1 and the second fluid device 2, conventionally, the first fluid device 1 and the second fluid device 2 are used. It is not necessary to use a member such as a tube that needs to be interposed between the and. Therefore, the two fluid devices 1 and 2 can be fluidly connected in a state of being as close as possible to each other, and the installation space of these fluid devices 1 and 2 can be saved. In addition, it is possible to prevent fluid leakage from the connection portion of the two fluid devices 1 and 2.

In view of the above teachings, it is clear that the present invention can take many modified and modified forms. Therefore, it should be understood that the present invention may be practiced in a manner other than that described herein, within the scope of the appended claims.

1 1st fluid equipment 2 2nd fluid equipment 11 1st receiving part 12 2nd receiving part 13 1st tubular member 14 2nd tubular member 15 Connector 21 1st fluid flow path 25 2nd fluid flow path 53 1st engaging part 54 2nd engaging part 71 1st main body 72 1st engaging claw 76 2nd main body 77 2nd engaging claw 111 1st receiving part 112 2nd receiving part 115 Connecting body 151 No. 1 Receiving part 152 2nd receiving part 155 Connecting body 211 1st receiving part 212 2nd receiving part 215 Connecting body 271 3rd main body part 272 1st protruding part 273 Recessed 281 4th main body part 282 2nd protruding part 283 Convex part 321 5th main body part 322 3rd protruding part 323 3rd engaging claw 331 6th main body part 332 4th protruding part 333 4th engaging claw

Claims (4)

It is a connection structure of the fluid equipment that connects the first fluid equipment and the second fluid equipment.
A tubular first receiving portion connected to the first fluid flow path of the first fluid device and provided in the first fluid device.
A tubular second receiving portion connected to the second fluid flow path of the second fluid device and provided in the second fluid device,
A first tubular member having a first engaging portion and provided in the first receiving portion,
A second tubular member having a second engaging portion that can be engaged with the first engaging portion and provided in the second receiving portion.
With a connecting body provided between the first receiving portion and the second receiving portion, sealing between the first receiving portion and sealing between the second receiving portion and the second receiving portion. With
The first tubular member is coaxially connected to the second tubular member, and is connected to the second tubular member.
The first engaging portion is located radially inward of the second engaging portion.
The first engaging portion includes a first protrusion protruding radially outward from a part of the first tubular member in the circumferential direction.
The second engaging portion includes a second protrusion that protrudes inward in the radial direction from a part of the second tubular member in the circumferential direction.
When the first tubular member is connected to the second tubular member, the first protrusion and the second protrusion are in a common circumferential direction between the first tubular member and the second tubular member. Are arranged at different positions in the above to allow the first tubular member and the second tubular member to move in a common axial direction.
After the first tubular member is connected to the second tubular member, one of the first tubular member and the second tubular member rotates about a common axis with respect to the other. As a result, the first protrusion and the second protrusion are displaced in the common circumferential direction to prevent the movement of the first protrusion and the second protrusion in the common axial direction, respectively. The first receiving portion has the same shape as the second receiving portion and has the same shape.
The connection structure for a fluid device according to claim 1, wherein the first tubular member has the same shape as the second tubular member. The connection structure of the fluid device according to claim 1 or 2 , wherein the first receiving portion and the second receiving portion are arranged coaxially with each other and are connected only through the connecting body. .. The connection structure for a fluid device according to any one of claims 1 to 3 , wherein the connecting body has an overhanging portion located between the first receiving portion and the second receiving portion. ..

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