JPH11294659A - Joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint which can be changed over to a water flow/water stop condition, can regulate slide of a cylinder body in the water flow condition, and does not become to a large diameter or generate many recessed and projecting parts. SOLUTION: The joint is provided with a valve mechanism which is combined into bodies 1, 2 and exchange water flow/water stop conditions, and an operating body 17 which is combined with the outer peripheral surface of the bodies 1, 2 movably in the same direction of the slid direction of a cylinder body 11, keeps the valve mechanism in the water stop condition when it is at a position spaced from the cylinder body 11, and exchanges the valve mechanism to the water flow condition when it is moved in the direction approaching the cylinder body 11. When the operating body 17 is moved in the direction approaching the cylinder body 11 and the valve mechanism is exchanged to the water flow condition, this operating body 17 abuts to the cylinder body 11 to regulate slide of the cylinder body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for connecting a device such as a watering nozzle to a hose or a pipe.

[0002]

2. Description of the Related Art Conventional joints are disclosed in, for example,
There is one disclosed in Japanese Patent Application Laid-Open No. 082395. In this joint, a hose or a pipe is connected to one end of the main body. In addition, a device such as a watering nozzle is plug-in connected to the other end of the main body. Then, by sliding the cylindrical body assembled on the outer peripheral surface of the main body in the axial direction, an appliance such as a watering nozzle can be removed.

[0003] A ball-type cock is incorporated in the main body. Then, depending on the rotational position of the ball-type cock, the water passage from the hose or pipe side to the appliance side such as a watering nozzle is opened and closed, and the state is switched to the water-permeation / water-stop state. Further, a handle for operating the ball-type cock is provided on the outer peripheral surface of the main body, and the cam plate is linked to the handle. Then, when the ball-type cock is rotated by the handle to switch to the water-flowing state, the cam plate is adjacent to the cylindrical body to regulate the slide.

[0004] In such a joint, if the ball cock is turned into a water-stop state, the device such as a watering nozzle is removed from the main body without spraying the fluid without stopping the water at the fluid source. be able to. In addition, since the apparatus is in the water stop state, when the device such as the watering nozzle is removed from the main body, the device such as the watering nozzle does not jump out due to the fluid pressure. In addition, since the cam plate regulates the slide of the cylinder when the water is flowing, it is possible to prevent the cylinder from being accidentally slid. Therefore, an instrument such as a watering nozzle does not come off due to an erroneous operation.

[0005]

However, in the joint of the prior art described above, a handle and a cam plate must be provided on the outer peripheral surface of the main body. For this reason, the joint is inevitably thickened, and the joint is increased in size, making it difficult to use. Also, if the handle and the cam plate are provided on the outer peripheral surface of the main body, the outer peripheral surface of the joint will have more irregularities. If the unevenness increases, for example, when the hose is wound on a hose winder, the possibility that the unevenness is caught or bumped by another thing increases. An object of the present invention is to be able to switch between a water-permeation / water-stop state, and to restrict the sliding of the cylindrical body in the water-permeation state, without becoming thicker or having many irregularities. It is to provide a joint.

[0006]

According to the present invention, there is provided an instrument-side connection mechanism for connecting an instrument such as a watering nozzle at one end of a main body, and a hose or a pipe connected to the other end of the main body. The fluid source side connection mechanism is provided, and the above-mentioned instrument side connection mechanism is premised on a joint in which a tubular body assembled on the outer peripheral surface of the main body is slid in the axial direction to remove a device such as a watering nozzle. According to the first aspect of the present invention, a valve mechanism that is incorporated in the main body and switches between a water-passing state and a water-stop state, and is movably mounted on the outer peripheral surface of the main body in the same direction as the sliding direction of the cylindrical body, and is located at a position away from the cylindrical body. At one time, the valve mechanism is kept in a water-stop state, and when moved in a direction approaching the cylinder, an operation body that switches the valve mechanism to a water-permeable state is provided, and the operation body is moved in a direction approaching the cylinder, A joint characterized in that when the valve mechanism is switched to a water-passing state, the operating body is configured to regulate the sliding of the cylindrical body adjacent to the cylindrical body.

According to a second aspect of the present invention, in the first aspect, the main body is divided into an instrument-side main body and a fluid source-side main body, while the valve mechanism is protruded from one of the main bodies to form a through hole formed in the main body. A tubular portion communicating with the water channel, an end face closing the end of the tubular portion, and a water hole communicating the inside of the tubular portion with the outer peripheral surface of the tubular portion; A guide cylinder communicated with a water passage formed in the apparatus, and while the cylinder portion is being inserted into the guide cylinder, the device-side main body and the fluid source-side main body are assembled so as to be freely strokeable in the axial direction. When in the position, the tube portion is in the guide tube, and the water passage hole is closed by the inner peripheral surface of the guide tube, and the water stops.
When the operating body is moved in a direction to approach the cylindrical body, both the main bodies are stroked in a direction to approach, and the cylindrical portion protrudes from the guide cylinder to a water passage side communicating with the guide cylinder, and the inside thereof is a water hole. It is characterized in that it is configured to switch to a water flow state in which the water flow path communicates with the water flow path via the.

In a third aspect based on the first aspect, the valve mechanism has a spool hole communicating with the instrument-side water passage and the fluid source-side water passage in the main body, and is slidably incorporated in the spool hole. When the operation body is at a position away from the cylinder, the spool is in a water-stop state in which both water passages are shut off, and when the operation body is moved in a direction approaching the cylinder, the spool moves. Then, it is characterized in that it is configured to switch to a water-passing state in which both water passages communicate with each other.

In a fourth aspect based on the first aspect, the valve mechanism includes a closing wall for blocking the instrument-side water passage and the fluid source-side water passage in the main body, and the instrument-side water passage on the outer peripheral surface of the main body. A communication hole that communicates with the water source, a water source hole that connects the fluid source side water passage to the outer peripheral surface of the main body, and a communication hole that is formed on the main body side surface of the operating body and that always communicates with the water source side water passage. When the operating body is at a position distant from the cylindrical body, the communication groove is in a water-blocking state blocked from the water hole of the appliance-side water passage, and the operating body is moved in a direction to approach the cylindrical body. At this time, the communication groove is characterized in that it is configured to be switched to a water passage state in which the communication groove communicates with the water passage hole of the appliance-side water passage.

[0010]

1 to 4 show a first embodiment of a joint according to the present invention.
As an example, a sprinkling nozzle joint is shown. As shown in FIGS. 1 and 3, the main body of the sprinkler nozzle joint is divided into a hose side main body 1 constituting the fluid source side main body according to the present invention and a nozzle side main body 2 constituting the instrument side main body according to the present invention. Divided. The hose-side main body 1 has a water passage 3 formed in the axial direction, and has a hose connection tubular portion 4 formed at a rear end thereof. A sleeve member 5 having a plurality of slits formed in the circumferential direction is attached to the outer peripheral surface of the hose connecting tube portion 4. An outer cylinder 6 is screwed onto the outer peripheral surface of the hose-side main body 1. The sleeve member 5 is located between the outer peripheral surface of the hose connection cylinder 4 and the inner peripheral surface of the outer cylinder 6.

When a hose (not shown) is connected, the hose is inserted between the hose connecting tube portion 4 and the sleeve member 5 with the outer tube 6 loosened. When the outer cylinder 6 is tightened, the outer cylinder 6 moves in the axial direction, and presses the taper 6 a formed on the inner peripheral surface of the outer cylinder 6 against the sleeve member 5.
Therefore, the diameter of the sleeve member 5 is reduced, and the distal end thereof is pressed against the hose to prevent the hose from coming off. It should be noted that these hose connection tube part 4, sleeve material 5,
The outer cylinder 6 and the like together constitute a fluid source side connection mechanism referred to in the present invention. At the distal end of the hose-side main body 1 thus formed, a tubular portion 7 communicated with the water passage 3 is integrally formed. However, the end of the cylindrical portion 7 is closed in a bag shape, and a water passage hole 8 is formed in the side surface of the cylindrical portion 7 to communicate the inside thereof with the outer peripheral surface of the cylindrical portion 7.

On the other hand, the nozzle-side main body 2 has a water passage 9 formed in the axial direction, and the leading end opening of the water passage 9 is a plug insertion portion 9a. A cylindrical body 11 is assembled together with a spring 10 on the outer peripheral surface of the tip of the nozzle-side main body 2. A plurality of claws 12 arranged in the circumferential direction are integrally provided on the inner peripheral surface of the cylindrical body 11. When the cylinder 11 is at the normal position shown in FIG. 1, these claws 12 protrude toward the plug insertion portion 9a. Therefore, when the plug 14 provided on the grip portion 13 of the watering nozzle (not shown) is inserted into the plug insertion portion 9a, the claw 12 is hooked on the step 15 formed on the plug 14 to prevent the watering nozzle from coming off. I do.

On the other hand, the cylinder 11 is connected to the spring 10
When these members are slid against them, these claws 12 are elastically deformed and retracted from the plug insertion portion 9a side. In this state, since the claws 12 are not caught on the step portion 15, the plug 14 can be pulled out from the plug insertion portion 9a, and the watering nozzle can be removed. The cylindrical body 11 and the spring 1
0, the claws 12 and the like constitute a device-side connection mechanism according to the present invention. A guide cylinder 16 communicating with the water passage 9 is integrally formed at the rear end of the nozzle-side main body 2 thus configured.

The tube 7 of the hose-side main body 1 is screwed into the guide tube 16 while being inserted into the guide tube 16 of the nozzle-side main body 2. Therefore, by rotating the hose side main body 1 and the nozzle side main body 2 relatively, the main bodies 1 and 2 can be relatively stroked in the axial direction. Further, as an operating body according to the present invention, a tubular cover 17 is provided so as to cover the tubular portion 7 and the guide barrel 16, and one open end of the tubular cover 17 is fixed to the hose-side main body 1. . The inner peripheral surface on the other open end side of the cylindrical cover 17 extends along the flange 18 of the nozzle-side main body 2. A ring-shaped stopper 19 is provided at the open end of the cylindrical cover 17, and when the hose-side main body 1 and the nozzle-side main body 2 make a predetermined stroke in a direction in which the hose-side main body 1 and the nozzle-side main body 2 are separated, the stopper 19 comes into contact with the flange 18. I have.

FIG. 1 shows that the stopper 19 is
8 shows the state of contact. In this state, since the water passage hole 8 of the tube portion 7 is closed by the inner peripheral surface of the guide tube 16, the flow of water from the water passage 3 of the hose side main body 1 is shut off.
(Water shut off). In this water-stop state, the end of the cylindrical cover 17 is separated from the cylindrical body 11 as shown in FIGS. Therefore, it is possible to slide the cylinder 11 to remove the watering nozzle.

From the above-mentioned water-stop state, when the two main bodies 1 and 2 are relatively rotated by holding the cylindrical cover 17 and stroked in a direction in which the hose-side main body 1 and the nozzle-side main body 2 approach each other, as shown in FIG. In addition, the tube portion 7 protrudes from the opening of the guide tube 16 toward the water passage 9. In this state, the water hole 8
Communicates with the water passage 9 so that the water in the water passage 3
→ It is guided to the water passage 9 and supplied to a watering nozzle (not shown) (water flowing state). And all of the water holes 8 are water passages 9
When communicating with the cylindrical cover 1 as shown in FIGS.
The end of 7 is just adjacent to the cylinder 11. Therefore,
The slide of the cylindrical body 11 is restricted, so that a watering nozzle (not shown) cannot be removed. In addition, this first
Contrary to the embodiment, the cylinder 7 may be formed on the nozzle-side main body 2 and the guide cylinder 16 may be formed on the hose-side main body 1.

In the joint for a watering nozzle according to the first embodiment described above, if the state is switched to the water-stopping state shown in FIGS. Can be removed. In addition, because it is in the water stop state,
When the watering nozzle is removed, the watering nozzle does not pop out due to the fluid pressure. 3 and 4, since the cylindrical cover 17 restricts the sliding of the cylindrical body 11, the cylindrical body 1 is inadvertently prevented.
1 can be prevented from sliding. Therefore, it is possible to prevent the watering nozzle from coming off due to an erroneous operation during the passage of water.

In addition, in the joint for a watering nozzle of the first embodiment, the cylindrical cover 17 for performing the operation of switching between the water-passing state and the water-stopping state is configured to simultaneously restrict the sliding of the cylindrical body 11, so that the handle and the handle are not connected. There is no need to provide a cam plate, and the joint can be prevented from becoming thick. Further, since the cylindrical cover 17 is used, unevenness can be reduced on the outer peripheral surface of the joint, and the unevenness does not catch on or hit other things.

FIGS. 5 to 7 show a joint for a watering nozzle according to a second embodiment. However, the provision of the fluid source side connection mechanism and the instrument side connection mechanism in the main body is the same as in the first embodiment. Therefore, the following description focuses on differences from the first embodiment, and the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in FIGS. 5 and 6, a hose-side water passage 3 and a water-spray nozzle-side water passage 9 are formed in a body 20 in which the hose-side body 1 and the nozzle-side body 2 are integrally formed.

In the vicinity of the center of the main body 20, there is formed a spool hole 21 which vertically communicates with the water passages 3, 9. A spool member 23 is slidably inserted into the spool hole 21 together with a spring 22. Also,
On the outer peripheral surface of the main body 20, as an operating body referred to in the present invention,
A slide switch 24 is provided. And link 2
One end of 5 is rotatably attached to the end of the spool member 23, and the other end is rotatably attached to the slide switch 24.

When the slide switch 24 is in the off position shown in FIG. 5, the spool member 23 blocks both water passages 3 and 9 (water stop state). Here, on the outer peripheral surface of the spool member 23, as shown in FIG. 7, an annular seal groove 26 which obliquely crosses the circumferential direction thereof is formed. In this water stop state, as shown in FIG. 5, the O-ring 27 fitted in the annular seal groove 26 is located above the water passage 3 in the drawing and below the water passage 9 in the drawing. Will be. Therefore, even if the water in the water passage 3 tries to flow along the circumferential direction of the spool member 23, the O-ring 27
To prevent leakage to the water passage 9 side.

From the above water stop state, the slide switch 24
Is slid in a direction approaching the cylinder 11, the link 25 rises, and the spool member 23 is
Push up against 2. And the slide switch 24
Is slid to the ON position shown in FIG. 6, the annular groove 28 formed in the spool member 23 communicates with the water passages 3 and 9. Therefore, the state is switched to the water passage state and the water passage 3
Is guided to the annular groove 28 → the water passage 9 and supplied to a watering nozzle (not shown) (water flowing state).

In this ON position, the slide switch 24 is immediately adjacent to the cylinder 11. Therefore,
The cylinder 11 cannot be slid, and a watering nozzle (not shown) cannot be removed. In the second embodiment, if the cylinder 11 is forcibly slid, the slide switch 24 is naturally returned to the off position by being pushed. Therefore, when removing the watering nozzle from the water-flowing state, it is not necessary to switch the slide switch 24 to the OFF position and then switch to the water-stopping state. However, from the viewpoint of preventing erroneous operation, it is necessary to provide an appropriate resistance to the slide of the slide switch 24 so as not to inadvertently slide the cylinder 11.

8 to 13 show a joint for a watering nozzle according to a third embodiment. However, the provision of the fluid source side connection mechanism and the instrument side connection mechanism in the main body is the same as in the first embodiment. Therefore, the following description focuses on differences from the first embodiment, and the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. Hose side body 1
Is different from the first embodiment in that the water passage 3 is opened at the distal end side. The hose side main body 1 has a water passage hole 29 that connects the water passage 3 to the outer peripheral surface of the hose side main body 1.

On the other hand, the nozzle-side main body 2 is integrally formed with an assembling cylindrical portion 30 at the rear end. In addition, a closed wall 31 that closes the water passage 9 is provided inside the assembled tubular portion 30. In addition, a water passage hole 32 that connects the water passage 9 to the outer peripheral surface side of the assembly tube portion 30 is formed in the assembly tube portion 30. Further, four slits 33 arranged in the circumferential direction are formed at the rear end of the mounting cylinder 30. A hook 34 protruding in the radial direction is formed at the rearmost end of the mounting cylinder 30.

When the mounting cylinder 30 of the nozzle-side main body 2 is inserted from the opening of the water passage 3 of the hose-side main body 1, the portion of the mounting cylinder 30 where the slit 33 is formed is reduced in diameter by elasticity. When the mounting cylinder 30 is inserted into the water passage 3 by a predetermined amount, a flange 35 provided on the mounting cylinder 30 is formed.
Contacts the tip of the hose-side main body 1. At the same time, since the rearmost end of the assembly tubular portion 30 comes to the position of the water passage hole 29, the assembly tubular portion 30 elastically returns to the original diameter, and the hook piece 34 is hooked on the end of the water passage hole 29. Will be. Therefore, it is not possible to insert the assembly tubular portion 30 into the water passage 3 anymore, or conversely, to remove it from the water passage 3, so that the two main bodies 1, 2 are assembled.

On the outer peripheral surfaces of the main bodies 1 and 2 assembled as described above, a cylindrical cover 3 is provided as an operating body according to the present invention.
6 is assembled. A communication groove 37 is formed on the hose-side main body 1 side of the inner peripheral surface of the cylindrical cover 36. As will be described in detail later, the communication groove 37 is for communicating or blocking the water passages 3 and 9 of the main bodies 1 and 2. A pair of projections 38 are formed on the inner peripheral surface of the cylindrical cover 36 on the nozzle-side main body 2 side so as to face each other in the radial direction. The projections 38 are respectively arranged along a pair of guide paths 39 provided on the outer periphery of the mounting cylinder 30.

More specifically, as shown in FIG. 10 (a), the outer peripheral surface of the assembling cylindrical portion 30 is provided with guide walls 40 along the axial direction.
41, and these guide walls 40, 41 are arranged in parallel. The projection 38 of the cylindrical cover 36 is inserted between the guide walls 40 and 41 as a guide path 39. Therefore, only the axial movement of the cylindrical cover 36 is allowed while the projection 38 is guided by the guide path 39. Further, one of the guide walls 40 is bent in the circumferential direction of the assembling tube portion 30 so that the crank portion 4
2 are formed. Therefore, as shown in FIG. 13A, when the convex portion 38 comes to the position of the crank portion 42, the rotation of the cylindrical cover 36 is permitted. As shown in FIGS. 10 (b) and 13 (b), the guide path 39 is formed as a pair in the radial direction of the mounting cylinder 30.

When the cylindrical cover 36 is at the position shown in FIG. 8, the water in the water passage 3 is guided to the communication groove 37 formed on the inner peripheral surface of the cylindrical cover 36 through the water hole 29. . However, since the other end of the communication groove 37 is closed by the outer peripheral surface of the hose-side main body 1, the water guided to the communication groove 37 is not guided to the nozzle-side main body 2 (water stopping state). ). And
In this water stop state, the end of the cylindrical cover 36 is separated from the cylindrical body 11 as shown in FIGS. Therefore, it is possible to slide the cylinder 11 to remove the watering nozzle.

When the cylindrical cover 36 is axially moved in the direction of the nozzle side main body 2 from the above-mentioned water stop state, as shown in FIG. It moves to the nozzle side main body 2 side beyond the tip.
Therefore, the water in the water passage 3 is discharged from the water passage hole 29 to the communication groove 37.
→ It is guided to the water passage 9 through the water passage hole 32 and supplied to a watering nozzle (not shown). Then, as shown in FIGS. 11 and 12, when the cylindrical cover 36 is slid until it comes adjacent to the cylindrical body 11, the convex portion 38 comes to the position of the crank portion 42 as shown in FIG. Therefore, the cylindrical cover 3
If the convex portion 38 is positioned on the crank portion 42 by rotating the cylinder 6, the movement of the tubular cover 36 itself is restricted. In this state, even if the user attempts to slide the cylinder 11 accidentally, the slide is restricted by the cylindrical cover 36, so that the watering nozzle (not shown) cannot be removed.

[0031]

According to the present invention, if the valve mechanism is switched to the water-stop state, it is possible to remove the sprinkler nozzle and other instruments without spouting the fluid without stopping the water at the faucet side. . Further, since the apparatus is in the water stop state, when the appliance such as the watering nozzle is removed, the appliance such as the watering nozzle does not jump out due to the fluid pressure. Then, when the state is switched to the water-passing state, the operating body is adjacent to the cylindrical body and regulates the slide. Therefore, it is possible to prevent the cylindrical body from being inadvertently slid during the passage of water, and the watering nozzle does not come off. In addition, since the operation body for switching between the water-passing state and the water-stop state is configured to simultaneously restrict the sliding of the cylindrical body, there is no need to provide a handle and a cam plate, and the joint is prevented from becoming thick. be able to. In addition, unevenness can be reduced on the outer peripheral surface of the joint, and the unevenness does not catch on or hit other things. In particular, according to the second to fourth inventions, compared to incorporating a ball-type cock in the main body,
Further, the size of the joint can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a joint for a watering nozzle according to a first embodiment of the present invention, showing a water-stop state.

FIG. 2 is a view of the sprinkling nozzle joint shown in FIG. 1 as viewed from the outer peripheral surface side. The plug 14 and the like are omitted.

FIG. 3 is a cross-sectional view of the sprinkling nozzle joint according to the first embodiment of the present invention, showing a water-passing state.

FIG. 4 is a view of the sprinkling nozzle joint shown in FIG. 3 as viewed from the outer peripheral surface side. The plug 14 and the like are omitted.

FIG. 5 is a sectional view of a joint for a watering nozzle according to a second embodiment of the present invention, showing a water-stop state. The plug 14 and the like are omitted.

FIG. 6 is a cross-sectional view of a joint for a watering nozzle according to a second embodiment of the present invention, showing a water flowing state. The plug 14 and the like are omitted.

FIG. 7 shows a spool member 23, (a) is a front view,
(b) is the figure seen from the b direction of FIG. 7 (a).

FIG. 8 is a sectional view of a joint for a watering nozzle according to a third embodiment of the present invention, showing a water-stop state. The plug 14 and the like are omitted.

FIG. 9 is a view of the sprinkling nozzle joint shown in FIG. 8 as viewed from the outer peripheral surface side.

10A and 10B show the relationship between the convex portion 38 and the guide path 39 when the sprinkling nozzle joint is in the water stopped state, and FIG.
FIG. 10B is a diagram viewed from the direction a (however, the cylindrical cover 36 is omitted), and FIG. 10B is a cross-sectional view taken along the line bb of FIG.

FIG. 11 is a cross-sectional view of a sprinkling nozzle joint according to a third embodiment of the present invention, showing a water-passing state. The plug 14 and the like are omitted.

12 is a view of the sprinkling nozzle joint shown in FIG. 11 as viewed from the outer peripheral surface side.

13A and 13B show the relationship between the convex portion 38 and the guide path 39 when the sprinkling nozzle joint is in a water flowing state, and FIG.
FIG. 13B is a diagram viewed from the direction a (however, the cylindrical cover 36 is omitted), and FIG. 13B is a cross-sectional view taken along the line bb of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hose-side main body 2 Nozzle-side main body 3, 9 Water passage 4 Hose connection tube part 5 Sleeve material 6 Outer tube 7 Tube part 8, 29, 32 Water passage hole 10 Spring 11 Tube 12 Claw 16 Guide tube 17, 36 Tube Cover 20 body 21 spool hole 23 spool member 24 slide switch 25 link 31 closing wall 37 communication groove

Claims (4)

[Claims] An apparatus-side connection mechanism for connecting an apparatus such as a watering nozzle is provided at one end of a main body, and a fluid source-side connection mechanism for connecting a hose or a pipe is provided at the other end of the main body. The above-described device-side connection mechanism is configured such that a tubular body assembled on the outer peripheral surface of the main body is slid in the axial direction to remove a device such as a watering nozzle. The valve mechanism and the outer peripheral surface of the main body are movably assembled in the same direction as the sliding direction of the cylindrical body, and when at a position away from the cylindrical body, the valve mechanism is kept in a water-stop state,
An operating body that switches the valve mechanism to a water-permeable state when moved in a direction approaching the cylindrical body, and moves the operating body in a direction to approach the cylindrical body to switch the valve mechanism to a water-permeable state; A joint, wherein an operating body is adjacent to the cylindrical body to regulate sliding of the cylindrical body. 2. A main body is divided into an appliance-side main body and a fluid source-side main body, and a valve mechanism projects from one of the main bodies and communicates with a water passage formed in the main body. An end face that closes the end of the cylindrical portion, a water hole that connects the inside of the cylindrical portion to the outer peripheral surface of the cylindrical portion, and a guide that is provided in one of the other main bodies and communicates with a water passage formed in the main body. A cylinder, and inserting the cylinder portion into the guide cylinder, assembling the instrument-side main body and the fluid-source-side main body freely in the axial direction,
When the operation body is at a position away from the cylinder, the cylinder portion is in the guide cylinder, the water passage hole is closed by the inner peripheral surface of the guide cylinder, and the operation body is brought closer to the cylinder. When the main body is moved in the direction, the main body strokes in the approaching direction, and the cylindrical portion protrudes from the guide cylinder toward the water passage that communicates with the guide cylinder, and the inside communicates with the water passage through the water hole. The joint according to claim 1, wherein the joint is configured to be switched to a water passing state. 3. A valve mechanism comprising: a spool hole communicating with an instrument-side water passage and a fluid source-side water passage in a main body; and a spool member slidably incorporated in the spool hole. When the spool is at a position distant from the cylindrical body, the spool is in a water-stop state in which the two water passages are shut off. When the operating body is moved in a direction approaching the cylindrical body, the spool moves to communicate with the two water passages. The joint according to claim 1, wherein the joint is configured to switch to a water state. 4. A valve mechanism comprising: a closing wall that blocks an instrument-side water passage and a fluid source-side water passage in a main body; a water passage hole that communicates the instrument-side water passage with an outer peripheral surface of the main body; A water passage that communicates the water passage with the outer peripheral surface of the main body; and a communication groove that is formed on the main body-side surface of the operation body and that constantly communicates with the water passage hole of the fluid source-side water passage. When the operating groove is at a position distant from the instrument, the communication groove is cut off from the water hole of the instrument-side water passage, and when the operating body is moved in a direction approaching the cylinder, the communication groove becomes The joint according to claim 1, wherein the joint is configured to be switched to a water passage state communicating with the water passage hole.