JP2016044763A - Hose coupler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hose coupler capable of preventing a lock nut from dropping out of a coupler main body and capable of easily fitting or removing the hose.SOLUTION: This invention relates to a hose coupler 1 having a coupler main body 3 for connecting a hose 2 to an outer circumferential surface of a connecting end part 4 and a lock nut 10 that can be fixed to an outer circumferential surface of the coupler main body 3 through a thread connection, can push a hose 2 from its outer circumference against a connecting end part 4 at a position where the thread connection is tightly fastened and the hose 2 is not substantially pushed from the outer circumference to the connecting end part 4 at a releasing position where the thread connection is released and the hose 2 is removably connected to another device. There is provided a dropping preventive means other than the thread connection, in which a first engaging part 15 is abutted against a second engaging part 19 to prevent the lock nut 10 from being dropped from the coupler main body 3, and the thread connection is released under a state in which the first engaging part 15 is abutted against the second engaging part 19 to prevent the lock nut 10 from being dropped.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hose joint that connects a hose to another device, and more particularly, to a structure for preventing a lock nut that presses the hose against the joint body from falling off the joint body.

Conventionally, a hose joint has been used to connect a hose to another device to supply liquid or gas.
The hose joint has a connection end for connecting the hose to one end of the joint body, and a connection end for connecting another device to the other end.

In the hose joint of Patent Document 1, the connection end (tube insertion core tube) for connecting the hose in the joint body is formed in a cylindrical shape, and the hose is covered with the hose on the outer peripheral surface, so that Connect.
A lock nut (cap nut) was detachably fixed to the outer peripheral surface of the joint body by screw connection.
At the position where the screw connection was deeply tightened, the tightening ring arranged in the lock nut could hold the hose from the outer periphery to the connection end and fix it.
Further, at the position where the screw connection was released, the lock nut and the tightening ring did not substantially press the hose from the outer periphery to the connection end, and the hose could be detached from the connection end.

The hose joint of Patent Document 1 has means for preventing the lock nut from falling off.
This drop-off prevention means is that the C-shaped stopper ring is disposed between the joint body and the lock nut, so that the lock nut is loosened from the temporary screwing position where the lock nut is screw-coupled to the joint body at a predetermined depth. Could be prevented.

Japanese Patent No. 3305318

In order to attach / detach the hose to / from the hose joint of Patent Document 1, the hose is attached / detached while the lock nut is held in the temporary screwing position by the drop-off preventing means, and the screw connection between the joint body and the lock nut is released to remove the hose. There was a method of attaching and detaching.
When attaching and detaching the hose while holding the lock nut in the temporary screwing position, the lock nut cannot be swung almost due to the double fixing of the screw connection at the temporary screwing position and the fixing by the tightening ring. The nut hinders hose attachment / detachment, making it difficult to attach / detach. In addition, since the connection end is covered with the lock nut, it is difficult to check whether the hose is securely connected to the connection end, and the connection is insufficient and the hose may come off.
When the screw connection is released and the hose is attached / detached, it is necessary to remove the stopper ring which is a drop-off preventing means. The stopper ring is pushed into the lock nut and is in contact with the inner surface of the lock nut from the front end of the joint body, and is in contact with the joint body from the back of the joint body. It was very time-consuming to attach, and the work of attaching and detaching the hose was troublesome. Further, when the screw connection between the lock nut and the joint body is released, the lock nut may fall off and be damaged or lost.
If it is attempted to release the screw connection between the joint body and the lock nut in a state where the stopper ring is attached, the stopper ring sandwiched between the two is crushed and damaged.
Thus, in the hose joint of patent document 1, it took time and effort to insert and remove the hose by any method.

  Further, in the hose joint disclosed in Patent Document 1, the joint body and the lock nut are transported and stored for a long time at a temporary screwing position where the screw coupling is shallow. During this time, there are few screw threads that are screwed together, but there is a risk of breakage due to concentration of the load on the screw threads.

  The present invention has been made to solve the above-described problems, and provides a hose joint that can prevent a lock nut from dropping from a joint body and can easily attach and detach a hose. Is an issue.

In the present invention, means for solving the above problems are as follows.
In the first invention, one end is a connection end, a joint body that connects a hose to the outer peripheral surface of the connection end, and can be fixed to the outer peripheral surface of the joint main body by screw connection, and the screw connection is deepened. The hose can be pressed from the outer periphery to the connection end at the tightened position, and the lock hose can be substantially not pressed from the outer periphery to the connection end at the position where the screw connection is released. A hose joint that is detachably connected to another device, and is formed integrally with the lock nut, or integrally attached to the joint body, or integrally attached to the lock nut. And when the lock nut is disposed on the outer periphery of the joint body, the second lock portion is positioned in the distal direction of the connection end portion with respect to the first lock portion. The first locking portion abuts against the second locking portion, and the lock nut can be prevented from falling off from the joint body; The screw coupling is released in a state where the one locking portion is in contact with the second locking portion and the lock nut is prevented from falling off.

  According to a second aspect of the present invention, a hose connection confirmation portion is provided on a peripheral surface of the lock nut, and the hose attached to the connection end portion from the outer peripheral side of the lock nut can be visually confirmed by the hose connection confirmation portion. Features.

  According to a third aspect of the present invention, the first locking portion of the drop-off preventing means is an E-ring having a locking claw, and is formed on the lock nut by being integrally attached to the outer peripheral surface of the lock nut. The locking claw penetrates through the claw opening and protrudes toward the joint body side, and the E ring is provided with a cover portion that closes the claw opening in a state of being integrally attached to the lock nut, and The lock nut can swing in the radial direction with respect to the joint body in a state where the lock nut is prevented from falling off by the drop-off preventing means.

  4th invention has a rib which prevents the penetration | invasion of the sand to the position of the said screw coupling | bonding by narrowing the clearance gap with the internal peripheral surface of the said lock nut protruding from the said coupling main body to radial direction. And

  According to a fifth aspect of the present invention, a sand reservoir is formed between the joint body and the lock nut by cutting out a part in the circumferential direction of the screw connection.

  6th invention is a watering apparatus characterized by having the hose joint as described in 1st invention to 5th invention.

According to the first aspect of the present invention, the first locking portion that is integrally formed with or integrally attached to the lock nut, and that is integrally formed with or integrally attached to the joint body, A second locking portion positioned in the distal direction of the connecting end portion with respect to the first locking portion when arranged on the outer periphery of the joint body, wherein the first locking portion is the second locking portion. Even if the screw connection between the lock nut and the joint body is released by having a drop prevention means other than the screw connection that can contact the part and prevent the lock nut from dropping from the joint body, The lock nut can be prevented from falling off.
Further, in a state in which the first locking portion is in contact with the second locking portion and the lock nut is prevented from falling off, the screw coupling is released, so that the lock nut is prevented by the drop-off preventing means. The hose can be easily attached to and detached from the connection end in a state where the drop-off is prevented.

  According to the second invention, a hose connection confirmation portion is provided on the peripheral surface of the lock nut, and the hose attached to the connection end portion from the outer peripheral side of the lock nut is visually confirmed by the hose connection confirmation portion. By being able to do so, the user can reliably connect the hose to the connection end, and the hose can be prevented from coming off due to insufficient connection.

According to a third invention, the first locking portion of the drop-off preventing means is an E-ring having a locking claw, and is formed on the lock nut by being integrally attached to the outer peripheral surface of the lock nut. When the locking claw penetrates through the claw opening and protrudes toward the joint main body, the E-ring can be easily attached to and detached from the lock nut, and maintenance such as cleaning can be performed.
In addition, the E-ring is provided with a cover portion that closes the claw opening in a state of being integrally attached to the lock nut, so that sand, dust, or small dust enters the claw opening and is screw-coupled. Inhibition can be prevented.
Further, the lock nut can be swung in the radial direction with respect to the joint body in a state where the lock nut is prevented from falling off by the drop-off preventing means. Since it swings so as not to hinder the extraction of the hose, it can be easily removed.

  According to a fourth aspect of the invention, there is provided a rib for preventing sand from entering the position of the screw coupling by projecting radially outward from the joint body and narrowing a gap with the inner peripheral surface of the lock nut. Thus, it is possible to prevent sand, dust, and small dust from entering and inhibiting the screw connection.

  According to the fifth invention, between the joint main body and the lock nut, the sand reservoir portion formed by cutting out a part in the circumferential direction of the screw connection is formed, so that sand or the like is present in the screw connection gap. Even if it intrudes, sand or the like is guided to the sand reservoir while the screw connection is tightened or loosened, so that it is possible to prevent the screw connection from being hindered.

  The watering device according to the sixth aspect of the invention has the hose joint described in the first to fifth aspects of the invention, thereby preventing the lock nut from falling off and attaching and detaching the hose easily and reliably. be able to.

It is a figure which shows the hose coupling which concerns on 1st embodiment of this invention, (a) is a side view, (b) is a partial expanded sectional view, (c) is a partial expanded perspective view. It is a figure which shows the coupling main body of the hose coupling, (a) is a perspective view, (b) is a side view, (c) is a partial expansion perspective view, (d) is explanatory drawing of a sand reservoir part. It is a figure which shows the lock nut of the hose coupling, (a) is a right side view, (b) is an upper side view, (c) is a right side view, (d) is a perspective view, and (e) is a longitudinal sectional view. It is. It is a figure which shows the E ring of the hose coupling, (a) is a perspective view, (b) is a side view, (c) is a top view. It is a figure which shows the hose coupling which concerns on 2nd embodiment of this invention, (a) is a side view, (b) is a longitudinal cross-sectional view, (c) is the elements on larger scale of (b). It is a figure which shows the lock nut of the hose coupling, (a) is a right side view, (b) is an upper side view, (c) is a right side view, (d) is a perspective view, and (e) is a longitudinal sectional view. It is.

Hereinafter, the hose coupling according to the first embodiment of the present invention will be described.
As shown in FIG. 1, the hose joint 1 is an instrument for detachably connecting the hose 2 to another device.
Other devices are not particularly limited, and include an apparatus for supplying water such as a faucet, an apparatus using water such as a watering nozzle, an apparatus for storing water such as a tank, and another hose.
Further, the other device is not limited to one, and may be a joint branched into two or more.
Furthermore, although the hose joint 1 needs to be able to attach and detach the hose 2, the hose joint 1 may be integrally fixed to another device and cannot be removed from the other device. For example, a hose joint can be provided at the end of a watering device such as a watering nozzle so that the hose can be attached and detached.
The hose joint 1 includes a joint body 3, a lock nut 10, and means for preventing the lock nut 10 from falling off.

As shown in FIG. 2, a cylindrical connection end 4 for connecting the hose 2 is formed at one end of the joint body 3.
A second connection end 5 for connecting another device is formed at another end of the joint body 3. In FIG. 2, the second connection end 5 is formed in the same shape as the connection end 4 in order to connect another hose as another device.
A flow path through which liquid or gas can pass from the connection end 4 to the second connection end 5 is formed inside the joint body 3.

The hose 2 is connected to the joint body 3 by covering the outer peripheral surface of the connection end 4.
In order to make it difficult to remove the connected hose 2 on the outer peripheral surface of the connection end portion 4, a barb 6 having a substantially triangular cross section is provided around.
Further, a male screw portion 7 is provided around the base end of the connection end portion 4 in order to attach the lock nut 10 by screw connection.

A rib 8 that protrudes in an annular shape is provided around the distal end side of the male screw portion 7. Since the height of the rib 8 is formed to a position close to the inner peripheral surface of the lock nut 10, even if sand, dust or small dust enters from a window 13 of the lock nut 10 which will be described later, these are the male screw portions 7. It is possible to prevent intrusion to the position.
Fine-grained sand (particle size: 0.125 to 0.25 mm) or medium-sized sand (particle diameter: 0.25 to 0.5 mm) that can enter between the male screw portion 7 and the female screw portion 11 and inhibit screw coupling. In order to prevent intrusion, the height of the rib 8 is preferably set so that the gap between the inner peripheral surface of the lock nut 10 and the rib 8 is 0.05 to 0.21 mm.

  A portion of the male screw portion 7 in the circumferential direction is cut out deeper than the bottom of the screw thread to form a sand reservoir 9. Even if sand, dust, or small dust enters between the male screw 7 and the female screw 11 and the screw connection is likely to be hindered, the sand or the like accumulates during the screw connection / removal operation. Since it is guided to the portion 9, the screw connection is not hindered.

A metal or a synthetic resin can be used as the material of the joint body 3.
Among them, a resin is preferable in terms of material cost and ease of molding, and among the resins, a thermoplastic resin excellent in ease of molding is preferable.
Among the thermoplastic resins, PP (polypropylene), ABS (acrylonitrile, butadiene, styrene copolymer resin) and POM (polyacetal) which are excellent in moldability are preferable. In particular, PP is preferable in terms of cost, and POM is preferable in terms of strength.
In the first embodiment, PP that can be produced at low cost is used.

As shown in FIG. 3, the lock nut 10 is a thick cylindrical part that is attached to the outer peripheral surface of the joint body 3 by screw connection.
A female screw portion 11 corresponding to the male screw portion 7 is formed on the inner peripheral surface of the lock nut 10.
The outer peripheral surface of the lock nut 10 (referring to the direction corresponding to the tip side of the connection end 4 when fixed to the joint body 3 by screw connection) is likely to be fingered when tightening or releasing the screw connection. Thus, it is formed in a substantially octagon.

The inner peripheral surface on the distal end side of the lock nut 10 is provided with a pressing portion 12 protruding inward so that the hose 2 can be pressed against the connection end portion 4 at a position where the screw connection is deeply tightened.
Instead of providing the pressing portion 12, the hose 2 may be pressed by interposing a fastening ring or the like separate from the lock nut 10 as in Patent Document 1.

A substantially rectangular window 13 is formed in the peripheral surface of the lock nut 10.
When the hose 2 is attached to the connection end 4, it can be confirmed that the hose 2 is securely inserted by the window 13.
When the hose 2 is attached to or detached from the joint body 3, that is, the window 13 is arranged, that is, the lock nut 10 is arranged on the outer periphery of the joint body 3. In the state (see FIG. 1B), the hose 2 that is correctly connected to the connection end 4 is formed in a position and size so that the position where the tip should reach can be seen.

The axial dimension of the window 13 is preferably set to 3 mm or more.
If the dimension is less than 3 mm, the window 13 is too small and it is difficult for the user to check the hose 2.
In order to improve the ease of visual confirmation by the user, the above dimensions are more preferably set to 3.5 to 5 mm.
In the first embodiment, the dimension is set to 3.5 mm.

The dimension in the circumferential direction of the window 13 is preferably set to 3 mm or more.
If the dimension is less than 3 mm, the window 13 is too small and it is difficult for the user to check the hose 2.
In order to improve the ease of visual confirmation by the user, the above dimensions are more preferably 3.5 mm or more, and particularly preferably 5 mm or more.
In the first embodiment, the dimension is 5 mm.

The window 13 may be covered with a transparent acrylic plate or the like as long as the inside of the lock nut 10 can be visually observed from the outside.
Further, instead of providing the window 13, the lock nut 10 may be formed of a transparent resin.

As a material of the lock nut 10, a metal or a synthetic resin can be used.
Among them, a resin is preferable in terms of material cost and ease of molding, and among the resins, a thermoplastic resin excellent in ease of molding is preferable.
Among thermoplastic resins, PP, ABS and POM which are excellent in moldability are preferable. In particular, PP is preferable in terms of cost, and POM is preferable in terms of strength.
In the first embodiment, PP that can be produced at low cost is used.

The hose joint 1 is provided with a drop prevention means for preventing the lock nut 10 from dropping from the joint body 3.
As shown in FIG. 4, in the first embodiment, an E-ring 14 is used as an example of the drop-off preventing means.
The E-ring 14 is a part formed in an arc shape, and has a substantially trapezoidal locking claw 15 projecting inward from a total of three locations including the center and the vicinity of both ends.
Moreover, the cover part 16 protrudes from the latching claw 15 of both ends in the circumferential direction, respectively.
The E ring 14 is detachably attached to the outer peripheral surface of the lock nut 10.

It is preferable to provide 3 to 6 locking claws 15.
When the number of the locking claws 15 is two or less, the fulcrum for attaching the E ring 14 to the lock nut 10 is reduced, and the E ring 14 is easily detached from the lock nut 10.
If seven or more locking claws 15 are provided, the size of each of the locking claws 15 is inevitably reduced, and the breakage is easily damaged.
In the first embodiment, three locking claws 14 are provided.

It is preferable that the formation angle α of the virtual radius line when the virtual radius line is drawn from the center of each of the locking claws 14 at both ends toward the center of the arc is 180 to 300 degrees.
When α is less than 180 degrees, the holding force of the E-ring 14 is reduced and the lock nut 10 is easily detached.
If α is greater than 300 degrees, the amount of bending of the E-ring 14 increases and plastic deformation is likely to occur.
In order for the E-ring 14 to be held by the lock nut 10 with an appropriate force, α is more preferably 210 to 280 degrees, and particularly preferably 220 to 275 degrees.
In order to ensure a large α, it is preferable that the locking claws 15 at both ends are provided in the vicinity of both ends of the E-ring 14.
Moreover, it is preferable that the interval when providing a plurality of the locking claws 15 is an equiangular interval.
In the first embodiment, α is set to 230 degrees, and adjacent locking claws 15 are arranged at intervals of 115 degrees.

The axial thickness T1 of the E ring 14 is preferably 2 to 3 mm in order to ensure the strength of the E ring 14.
In the first embodiment, T1 is 3 mm.
The radial thickness T2 of the E-ring 14 (portion other than the locking claw 15) is preferably set to 1 to 2 mm in order to be elastically deformed flexibly and return to its original shape.
In the first embodiment, T2 is set to 1.3 mm.

A metal or a synthetic resin can be used for the material of the E-ring 14.
Among them, a resin is preferable in terms of material cost and ease of molding, and among the resins, a thermoplastic resin excellent in ease of molding is preferable.
Among thermoplastic resins, PP, POM, and ABS, which are excellent in moldability, are preferable. Among these, PP is particularly excellent in flexibility. POM is excellent in fatigue resistance, creep resistance and strength.
In the first embodiment, POM is used.

The outer diameter of the arc of the E ring 14 is preferably set so as to substantially match the outer diameter of the lock nut 10.
If the outer diameter of the E-ring 14 becomes too larger than the outer diameter of the lock nut 10, the E-ring 14 will protrude when attached to the lock nut 10, making it difficult to hold the lock nut 10 and the hose joint 1. The E-ring 14 is easy to come off when dropped or hit.
If the outer diameter of the E-ring 14 becomes too smaller than the outer diameter of the lock nut 10, the E-ring 14 will be recessed when attached to the lock nut 10, so the E-ring 14 is removed from the lock nut 10 when necessary. It becomes difficult.
The difference between the outer diameter of the E-ring 14 and the outer diameter of the lock nut 10 is preferably 0.5 mm or less, and particularly preferably 0.3 mm or less.

As shown in FIG. 3, an E-ring 14 is externally fitted on the outer peripheral surface of the lock nut 10 (referred to as a direction corresponding to the base side of the connection end 4 when screwed to the joint body 3). For this purpose, a groove 17 is recessed.
Further, claw openings 18 are formed in the grooves 17 at positions where the locking claws 15 of the E-ring 14 are disposed.
When the E-ring 14 is attached to the lock nut 10, the locking claw 15 penetrates the claw opening 18 and protrudes from the lock nut 10 to the inner joint body 3 side. At this time, the outer peripheral surface of the E-ring 14 is substantially continuous with the outer peripheral surface of the lock nut 10, and a curved surface having substantially no unevenness is formed.
Further, the claw opening 18 is formed to be slightly larger than the locking claw 15 so that the locking claw 15 can be easily inserted. However, when the E ring 14 is externally fitted, the groove 17 and the claw opening 18 are formed by the cover portion 16. It is closed without any gaps and can prevent sand and dust from entering.

As shown in FIGS. 1 and 2, in the joint main body 3, a locking collar portion 19 that protrudes in an annular shape is provided around the root side of the male screw portion 7.
The outer diameter of the locking collar portion 19 is set to be larger than the radius of the circle whose circumference passes through the tips of the three locking claws 15 of the E ring 14.

In order to attach the hose 2 in the hose joint 1, first, the lock nut 10 is inserted from the tip of the connection end 4 of the joint body 3.
As shown in FIG. 1 (a), when the claw opening 18 of the lock nut 10 reaches the back of the base side of the locking collar portion 19 of the joint body 3, the E ring 14 is externally fitted to the lock nut 10.
As a result, the locking collar 19 is positioned in the distal direction of the connection end 4 with respect to the locking claw 15 of the E ring 14, so that when the lock nut 10 is about to fall off the joint body 3, the locking claw 15 It can abut against the locking collar 19 and prevent it from falling off.
As shown in FIG. 1 (b), when the locking claw 15 is in contact with the locking collar 19, the female thread 11 of the lock nut 10 is more distal than the male thread 7 of the joint body 3. The screw connection is released.

Next, the hose 2 is put on the outer peripheral surface of the connection end 4 in this state.
At this time, the lock nut 10 is prevented from falling off, but since the screw connection is released, there is a relatively large gap between the lock nut 10 and the joint body 3, and the lock nut 10 is swung in the radial direction with respect to the joint body 3. Since it can move and can freely rotate in the circumferential direction, the hose 2 can be easily connected without interfering with the connection work of the hose 2.
When the hose 2 is inserted from the window 13 until it can be seen, the hose 2 can be reliably connected to the connection end 4.

When the hose 2 is connected to the connection end 4, the lock nut 10 is moved to the base side of the connection end 4 and the male screw portion 7 and the female screw portion 11 are fastened.
When the screw connection is deeply tightened, the pressing portion 12 of the lock nut 10 reaches the outer periphery of the connection end portion 4 and presses the hose 2 against the connection end portion 4 so that the hose 2 can be fixed so as not to come off.
“Deeply tightening the screw connection” means that the length of the portion where the male screw portion 7 and the female screw portion 11 are screw-coupled to each other is increased.

In order to remove the hose 2 from the hose joint 1, it is only necessary to first release the screw connection between the male screw portion 7 and the female screw portion 11 and then pull the hose 2 from the connection end portion 4.
At this time, the lock nut 10 does not substantially hold down the hose 2 and can swing in the radial direction with respect to the joint body 3 and can freely rotate in the circumferential direction. The hose 2 can be easily removed without interfering with the extraction work.
Even when the lock nut 10 is about to come off from the connection end 4 together with the hose 2, the locking claw 15 comes into contact with the locking collar portion 19, and can be prevented from falling off.

When cleaning the connection end 4 of the joint body 3 and the inside of the lock nut 10, as shown in FIG. 1C, the E-ring 14 is removed from the lock nut 10, and the lock nut 10 and the joint are removed. The hose joint 1 can be disassembled by releasing the screw connection with the main body 3.
Since the E-ring 14 is attached to the outer peripheral surface of the lock nut 10, it can be removed from the lock nut 10 relatively easily.

<Second embodiment>
If the lock nut 10 can prevent the lock nut 10 from falling off and the screw connection between the male screw portion 7 and the female screw portion 11 is released when the lock nut 10 is operating, the E ring can be used. The structure is not limited to 14, but may be a snap fit, a set screw, a structure in which a convex portion is provided by welding or adhesion, and the like.
As an example of this, as shown in FIGS. 5 and 6, in the second embodiment, a drop-off preventing means by snap fit is provided.

As shown in FIG. 6, in the second embodiment, locking openings 20 are formed at four locations on the circumference of the lock nut 10.
A locking projection 21 is formed at the base side edge of the locking opening 20.
The locking projection 21 has a tip portion facing the locking opening 20 rising substantially vertically from the inner peripheral surface of the lock nut 10, and has a gentle slope on the base side of the lock nut 10. .
As shown in FIG. 5, the joint body 3 is provided with a locking collar portion 19 as in the first embodiment.

In order to attach the lock nut 10 to the joint body 3 with the hose joint 1 of the second embodiment, first, the lock nut 10 is inserted from the tip of the connection end 4 of the joint body 3.
When the locking projection 21 reaches the locking collar 19 of the joint body 3, the locking projection 21 and the locking collar 19 are elastically deformed along the slope of the locking projection 21.
When the locking opening 20 reaches the position of the locking hook 19, the shapes of the locking protrusion 21 and the locking hook 19 are restored.
As a result, the locking collar 19 is positioned in the distal direction of the connection end 4 with respect to the locking projection 21, so that the locking projection 21 is locked when the lock nut 10 is about to fall off the joint body 3. It can contact | abut to the collar part 19 and can prevent dropping.
As shown in FIG. 5 (c), in a state where the locking projection 21 is in contact with the locking collar 19, the female thread 11 of the lock nut 10 is more distal than the male thread 7 of the joint body 3. The screw connection is released.

In this state, the hose 2 can be easily attached to and detached from the connection end 4.
Further, when the hose 2 is attached to the connection end 4 and the screw connection between the male screw portion 7 and the female screw portion 11 is deeply tightened, the pressing portion 12 of the lock nut 10 presses the hose 2 against the connection end portion 4. The hose 2 can be fixed so as not to come off.

  When cleaning the inside of the connection end 4 of the joint body 3 and the lock nut 10, the lock nut 10 is pulled toward the distal end side while pushing the rib 8 from the lock opening 20 with a strong force. The lock nut 10 can be detached from the joint body 3 by elastically deforming the portion 21 and the locking collar portion 19.

<Other variations>
In the second embodiment, the locking nut 21 is provided with the locking projection 21, but the locking projection 21 is integrally formed when the lock nut 10 is molded, and welding or bonding such as ultrasonic welding is performed. You may attach to the lock nut 10 by adhesion | attachment using an agent etc.

  Furthermore, as another example of the drop-off preventing means, a screw hole drilled in the peripheral surface of the lock nut 10 and attached to the screw hole by screw coupling, can protrude from the lock nut to the inner periphery and abut against the rib. A screw may be provided.

  Further, in the first embodiment and the second embodiment, the locking claw 15 and the locking projection 21 (first locking portion) projecting inward from the lock nut 10 and the locking collar portion 19 (first locking portion) of the joint body 3 are provided. Contrary to this, a concave portion provided on the inner peripheral surface of the lock nut 10 by providing a portion protruding from the joint body 3 (second locking portion). You may make it contact | abut (the 1st latching | locking part).

DESCRIPTION OF SYMBOLS 1 Hose coupling 2 Hose 3 Joint main body 4 Connection end part 5 Second connection end part 6 Return 7 Male thread part 8 Rib 9 Sand reservoir part 10 Lock nut 11 Female thread part 12 Holding part 13 Window 14 E ring 15 Locking claw 16 Cover part 17 Groove 18 Claw opening 19 Locking hook part 20 Locking opening 21 Locking convex part α Angle T1 thickness T2 thickness

Claims (6)

One end is a connection end, and a joint body that connects a hose to the outer peripheral surface of the connection end,
The hose can be fixed to the outer peripheral surface of the joint body by screw coupling, and the hose can be pressed from the outer circumference to the connection end at a position where the screw coupling is deeply tightened. Having a lock nut that does not substantially press against the connection end from the outer periphery,
In the hose joint that detachably connects the hose to another device,
A first locking portion formed integrally with or attached to the lock nut;
The joint body is integrally formed with or integrally attached to the joint body, and when the lock nut is disposed on the outer periphery of the joint body, the joint body is positioned in the distal direction of the connection end portion with respect to the first locking portion. Consisting of two locking parts,
The first locking portion abuts against the second locking portion, and has a drop prevention means other than the screw coupling that can prevent the lock nut from dropping from the joint body,
The hose coupling is released when the first locking portion is in contact with the second locking portion to prevent the lock nut from falling off.   The hose connection confirmation part is provided in the surrounding surface of the said lock nut, The said hose attached to the said connection end part from the outer peripheral side of the said lock nut can be visually confirmed by this hose connection confirmation part. The hose coupling described. The first locking portion of the drop-off prevention means is an E-ring having a locking claw, and is integrally attached to the outer peripheral surface of the lock nut, thereby opening the claw opening formed in the lock nut. While the pawl penetrates and protrudes toward the joint body,
The E ring is provided with a cover portion that closes the claw opening in a state of being integrally attached to the lock nut,
2. The hose coupling according to claim 1, wherein the lock nut is swingable in a radial direction with respect to the joint body in a state in which the lock nut is prevented from dropping by the drop prevention means. .   2. A rib for preventing sand from entering the position of the screw coupling by projecting radially outward from the joint body and narrowing a gap with an inner peripheral surface of the lock nut. The hose coupling according to any one of 3 above.   The hose coupling according to any one of claims 1 to 4, wherein a sand reservoir part in which a part in a circumferential direction of screw connection is cut out is formed between the coupling main body and the lock nut.   A watering device comprising the hose joint according to claim 1.

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