JP6793963B2 - Injection unit of liquid sprayer - Google Patents

Description

The present invention makes it easy and quick to connect an injection tube unit of a liquid spraying device used for spraying pesticides, water, etc., specifically, an injection tube that requires phase matching by devising a nozzle connection portion by a pipe joint. Regarding the nozzle unit that has been made possible.
The nozzle connecting portion referred to here is a connecting portion between the nozzles separated in the longitudinal direction and a connecting portion of the nozzle to the nozzle support portion of the liquid spraying device.

As a prior art of the above-mentioned injection tube unit, there is one shown in Patent Document 1 below. In the injection tube unit described in the same document, at least one of the connected tubes is composed of an injection tube having a nozzle, and the connected tube is the injection tube of the connection partner or the injection tube support portion of the liquid spraying device. It is connected freely by disconnecting it via a one-touch type pipe joint.

The pipe joint includes a socket, a plug to be inserted into the socket, a lock mechanism for holding the inserted state at the insertion end point of the plug to the socket, and a positioning mechanism for matching the phases of the socket and the plug.

The locking mechanism has a locking groove provided on the outer periphery of the plug, a sphere incorporated in a radial through hole provided in the socket, and a second outer fitting that is non-rotatable relative to the socket and slidable in the axial direction. It is composed of one sleeve and a spring that urges the first sleeve in the locking direction (the direction in which the plug is pulled out from the socket).

The plug is inserted into the socket by pulling the first sleeve to an unlock point. When the insertion is made to the end point, a part of the sphere protrudes toward the inner surface side of the socket and enters the locking groove.

In this state, the first sleeve is moved to the lock point (the end point of movement in the plug extraction direction) by the force of the spring, and the state of the sphere being inserted into the locking groove is maintained, whereby the socket of the plug is maintained. It is blocked from coming out of.

The positioning mechanism includes a concave portion and a convex portion provided corresponding to the first sleeve and the plug. The concave portion and the convex portion are non-circularly fitted at a position where the phases of the socket and the plug match, and prevent the relative rotation of the socket and the plug.

When connecting the nozzles to each other, it is necessary to align the directions of the nozzles of the nozzles connected to each other, and at the connection of the nozzles to the nozzle support of the liquid spraying device, the nozzles provided with a spray switching lever or the like. The phase matching of the socket and the plug is indispensable because the injection tube needs to be connected to the support portion in a specified direction.

Japanese Unexamined Patent Publication No. 2016-14039

The present invention is an improvement on the injection tube unit described in Patent Document 1. In the pipe joint of the injection tube unit described in the same document, a flange is provided on the outer circumference of the plug, and a chamfered portion having a width across flats is formed on the outer periphery on the front surface of the flange (the surface on the front side in the plug insertion direction). A convex portion of the positioning mechanism is provided, and the convex portion is fitted into a concave portion formed inside the first sleeve in a non-circular shape.

Since the collar on the outer periphery of the plug is inserted into the inside of the first sleeve and the convex portion is provided on the front surface of the collar, the injection tube unit of Patent Document 1 is used when the plug is inserted into the socket. It was not possible to visually check whether the orientation of the convex portion and the orientation of the concave portion match.

For that purpose, a method in which the plug is inserted halfway into the socket, and the connected pipe on the side with the plug and the connected pipe on the side with the socket are relatively rotated to the point where the convex portion and the concave portion are fitted with the insertion force applied. Is taken.

The connection work has to rely on the senses and familiarity of the worker, and does not fully meet the demand for further improvement of workability.

Therefore, the present invention makes it easy and quick to connect the injection pipe by the pipe joint without relying on the operator's feeling or the like for the injection pipe unit including the pipe joint provided with the positioning mechanism for matching the phases of the connected pipes. The challenge is to be able to do this.

In order to solve the above problems, in the present invention, at least one of the connected pipes is composed of a nozzle having a nozzle, and the connected pipes are detachably connected to each other via a pipe joint.
The pipe joint is a socket in which a second sleeve that cannot rotate relative to the outer periphery of the first sleeve and the first sleeve and is slidably mounted in the axial direction is combined, and a plug that is inserted inside the first sleeve. A seal member that tightly seals between the socket and the plug, a lock mechanism that holds the plug inserted into the socket, and a positioning mechanism that matches the phase of the socket and the plug are provided.
The positioning mechanism is composed of a first concave portion and a first convex portion provided corresponding to the first sleeve and the plug and fitted to each other.
The plug is inserted into the socket while the second sleeve is pulled to the unlock point, and the first concave portion and the first convex portion are non-circularly fitted at a position where the phases of the socket and the plug match. In addition, the plug is inserted to the end point,
The injection tube unit of the liquid spraying device configured so that the second sleeve is returned to the lock point at the insertion end point and the insertion state of the plug into the socket by the lock mechanism is maintained is configured as follows. did. That is,
On the outer circumference of the plug, there is a plug guide mounted so that it cannot rotate relative to the plug and cannot move relative to the axial direction, and the plug guide is locked at a position where the plug is inserted into the socket and inserted to the end point. A visible second that is positioned so as to abut against the tip of the second sleeve that has moved to a point, and protrudes in the axial direction so that the plug guide and the second sleeve are in phase with each other and the socket and the plug are fitted to each other. The convex portion of 2 and the visible second concave portion that entered in the axial direction were provided.

The second convex portion has a tapered portion whose both side surfaces are inclined toward the tip end side of the convex portion, and the second concave portion enters a guide surface of the taper corresponding to the tapered portion. It is preferable to have it on the side.

Further, the second convex portion is provided on the plug guide so that the tip of the tapered portion and the root of the first convex portion are aligned in the axial direction, and the second convex portion is the said. The second concave portion has a small convex portion parallel to the axial center of both side surfaces protruding from the tip of the tapered portion in the axial direction, and the second concave portion is on the back end side of the small convex portion receiving portion into which the small convex portion fits. It is also preferable to keep it in the same place.

The injection tube unit of the present invention is provided with a visible second convex portion and a second concave portion on a plug guide fixedly provided on the outer periphery of the second sleeve and the plug, and the second convex portion thereof is provided. By visually fitting the second recess and the second recess, the phase matching state of the plug and the socket can be confirmed and the plug can be inserted into the socket.

This eliminates the need for the work of intentionally rotating the connected pipe relative to each other while applying an insertion force to align the positions of the concave portion and the convex portion, and facilitates and speeds up the connecting work by the pipe joint.

If the second convex portion has the tapered portion and the second concave portion has the guide surface of the taper on the inlet side, the contact of the second convex portion with the guide surface of the taper Since the component force of the plug pushing force is applied to the part as a force to rotate the plug and the socket relative to each other, the phase shift between the plug and the socket is naturally corrected, and the connection work becomes easier.

Further, the second convex portion is provided on the plug guide, the tip of the tapered portion is at a position where it overlaps with the root of the first convex portion, and the second convex portion forms the small convex portion. The injection pipe unit provided with a pipe joint in which the second concave portion has the small convex portion receiving portion, respectively, has the effect of maintaining the phase of the plug and the socket by fitting the small convex portion and the small convex portion receiving portion. Can be enhanced.

It is a perspective view which shows the appearance of one form of the injection tube unit of this invention in a state where the connection by a pipe joint is broken. It is a side view which shows the part of the injection tube unit of FIG. 1 enlarged. It is a side view of the injection pipe connection part by the pipe joint of the injection pipe unit of FIG. It is sectional drawing which follows the AA line of FIG. It is a side view which shows in the state which the injection tube of the injection tube unit of FIG. 2 is separated. It is sectional drawing along the line BB of FIG. It is a cross-sectional view of the direction along the line CC of FIG. 6 (the position rotated by 90 ° from the cross-sectional view position of FIG. 5). It is a perspective view which shows the detached state of an injection tube. It is an end view of the socket side of a pipe joint. It is sectional drawing along the DD line of FIG. FIG. 5 is an enlarged cross-sectional view of a portion of the chain line frame E in FIG. 7.

Hereinafter, embodiments of the injection tube unit of the liquid spraying device of the present invention will be described with reference to FIGS. 1 to 11 of the accompanying drawings.

噴管unit 1 of Figure 1, each divided longitudinally nozzle holes (nozzle) 3 for convenience of噴管2 (described with, one of噴管2 _-1, and the other噴管_2-2 The) is detachably connected via the pipe joint 10.

噴管2 _-1, tube provided with the connection portion 4噴管supporting portion of the liquid spraying device relative (not shown),噴管2 _-2, closes the ends of the unconnected side end plugs 5 tubes However, a nozzle unit that adds three or more nozzles and a nozzle unit that connects the nozzle to the nozzle support portion of the liquid spraying device with a pipe joint 10 are also conceivable.

The pipe joint 10 includes a socket 11, a plug 12 inserted into the socket, a lock mechanism for holding the plug 12 inserted into the socket 11, and a socket 11, which are shown in detail in FIGS. 4, 5, 6, and 7. And a positioning mechanism that holds the plug 12 at the phase matching point are used in combination.

The locking mechanism is composed of a sphere 11b, a second sleeve 11c, a first spring 11d, and a locking groove 12b on the plug 12 side, which will be described later.

Further, the positioning mechanism is also composed of a first concave portion 13 on the socket side and a first convex portion 14 on the plug side, which will be described later.

The socket 11 includes a first sleeve 11a, a sphere 11b, a second sleeve 11c, a first spring 11d, a third sleeve 11e, a second spring 11f, a sealing member 11g that seals between the socket 11 and the plug 12, and a jet. It is configured by combining a seal ring 11h that seals between the tube _2-1 and the socket 11 and a seal retainer 11i.

The first sleeve 11a is a sleeve into which the plug 12 is inserted. The sphere 11b is incorporated in a radial through hole H provided in the first sleeve 11a.

Further, the second sleeve 11c is mounted on the outside of the first sleeve 11a so as to be relatively non-rotatable and slidable in the axial direction, and is attached in the locking direction (the direction in which the plug 12 is pulled out from the socket 11) by the first spring 11d. It is being pushed.

The third sleeve 11e is slidably arranged inside the first sleeve 11a in the axial direction, and is urged by the second spring 11f in the same direction as the second sleeve 11c.

The third sleeve 11e closes the opening on the inner end side of the through hole H provided in the first sleeve 11a when the plug 12 is pulled out from the socket 11, and a part of the sphere 11b is inside the first sleeve 11a. Prevent it from sticking out.

When the plug 12 is inserted into the first sleeve 11a, it is pushed by the plug 12 of the third sleeve 11e and retracted to a position where the opening on the inner end side of the through hole H of the first sleeve 11a is opened, whereby the sphere 11b Part of the plug enters the locking groove 12b on the outer circumference of the plug. The enter state,噴管2 _-1 by the pipe joint 10 is held by the second sleeve 11c is returned to the locking _point, 2 _-2 connection state is maintained.

Sealing member 11g is disposed between the outer the inner and the plug 12 of the first sleeve 11a, the seal ring 11h is held in assembly position by a seal retainer 11i mounting the socket and the socket 11噴管2 _- It is arranged between ₁ and ₁ .

In the first sleeve 11a, two divided bodies Sb1 and Sb2 divided in the axial direction are screwed together for assembling the third sleeve 11e and the like, and further, the central portion is radially connected to the tip surface of the divided body Sb1. and it is used as having a first recess 13 having an inner surface parallel planes fs1 (refer to FIG. 9) which crosses, divided body Sb2 is screwed into噴管2 _-1.

The first sleeve 11a has a plane fs2 (also see FIG. 9) parallel to the outer periphery of the distal end side of the split body Sb1, and the second sleeve 11c has a plane fs2 (also see FIG. 9). Non-circular fitting on the tip side to prevent rotation.

The plug 12 has a locking groove 12b and an annular convex portion 12c whose end surface abuts on the tip of the third sleeve 11e on the outer periphery of the portion 12a inserted into the first sleeve 11a.

Also has a large-diameter cylindrical portion 12d which continues to the site 12a rear end, the front of the end wall of the tip of the large-diameter cylindrical portion 12d,噴管_{2 -1} and _{2 -2} phases are aligned position (socket A first convex portion 14 that fits into the first concave portion 13 at a position where the phases of the plug 12 and the plug 12 are aligned) is provided so as to project.

The end wall at the tip of the large-diameter tubular portion 12d of the plug 12 functions to close the opening of the socket 11 at the insertion end point of the plug 12 with respect to the socket 11.

Plug 12, the large-diameter cylindrical portion 12d is screwed into噴管_2-2. As between the large-diameter cylindrical portion 12d and噴管_2-2 are also sealed liquid-tightly by a seal ring 11h. The seal ring 11h is held at the assembly position by the seal retainer 12e screwed to the large diameter tubular portion 12d in the same manner as the seal ring on the socket side.

A plug guide 15 is provided on the outer circumference of the large-diameter tubular portion 12d of the plug 12. The plug guide 15 is attached to the plug 12 so that it cannot rotate relative to the plug 12 and cannot move relative to the axial direction.

As shown in FIG. 10, the large-diameter tubular portion 12d of the plug 12 has a plane fs3 arranged in parallel on the outer circumference, and the plug guide 15 is non-circularly fitted to the large-diameter tubular portion 12d to be fitted with the plug 12. The relative rotation of the plug guide 15 is blocked.

Further, a locking claw 16 (see FIG. 11) is provided on the inner surface of the plug guide 15, and the locking claw 16 is held by a stepped portion on the outer circumference of the large-diameter tubular portion 12d of the plug 12, and the plug 12 And the relative movement of the plug guide 15 in the axial direction is prevented.

The plug guide 15 is at a position where the plug 12 is inserted into the socket 11 to the end point and is abutted against the tip of the second sleeve 11c.

The plug guide 15 and the second sleeve 11c have a second convex portion 17 and a second concave portion 18 having corresponding shapes that are fitted to each other at a position where the plug 12 is inserted into the socket 11 to the end point. It is provided.

The second convex portion 17 and the second concave portion 18 are provided at two positions of the plug guide 15 and the second sleeve 11c rotated by 180 ° in consideration of balance, but at least one location may be sufficient.

A second convex portion 17 and the second recess 18 is in the position fitted to each other at a position whose phase is aligned in噴管2 _-1 and _2-2.

The second convex portion 17 provided on the plug guide 15 has tapered portions 17a whose side surfaces s and s (see FIGS. 3 and 5) are inclined in a direction toward the tip end side of the convex portion. ing. The tip of the tapered portion 17a and the base of the first convex portion 14 are aligned in the axial direction.

Further, the second convex portion 17 is provided with a small convex portion 17b that further protrudes in the axial direction from the tip of the tapered portion 17a. The small convex portion 17b is a convex portion whose both side surfaces are parallel to the axis.

The second concave portion 18 has a tapered guide surface 18a corresponding to the tapered portion 17a of the second convex portion on the inlet side. Further, the small convex portion receiving portion 18b to which the small convex portion 17b fits and fits is provided on the back end side.

The plug guide 15 and the second sleeve 11c have the same outer diameter. Further, the properties of the outer circumferences of the plug guide 15 and the second sleeve 11c (that in the figure are the size and pitch of the non-slip serrations) are also the same, and the injection pipe connecting portion by the pipe joint 10 looks good.

The second convex portion 17 and the second concave portion 18 may be provided with the second convex portion 17 at the tip of the second sleeve 11c and the second concave portion 18 at the tip of the plug guide 15.

噴管unit 1 thus constructed exemplified can visually observe the second protrusion 17 positions the second recess 18 when connecting噴管2 _-1, 2 _-2, first It can be confirmed that the positions of the concave portion 13 and the first convex portion 14 of the above are matched, and the connected pipe can be easily and quickly connected via the pipe joint 10.

In particular, the illustrated pipe joint 10 is provided with a tapered guide surface 18a to which the tapered portion 17a of the second convex portion 17 fits into the inlet portion of the second concave portion 18, and the guide surface 18a of the taper is used. Since the phase shift of the pipes connected to each other by the inductive action is corrected when the plug is pushed in, the connection work becomes easier.

In the illustrated pipe joint 10, the small convex portion 17b included in the second convex portion 17 fits into the small convex portion receiving portion 18b of the second concave portion 18, and the phase of the socket 11 and the plug 12 is maintained (relative rotation prevention). The effect of is also enhanced.

The second convex portion 17 and the second concave portion 18 were installed for the main purpose of visually confirming that the phases of the first concave portion 13 and the first convex portion 14 were in agreement. The reason why the first concave portion 13 and the first convex portion 14 are deleted and the phase of the socket 11 and the plug 12 is maintained depends only on the fitting portion of the second convex portion 17 and the second concave portion 18. , The reliability of phase retention becomes insufficient, which is not preferable.

1噴管unit _{2 -1, 2 -2}噴管3 nozzle hole 4 connecting portion 10 fitting 11 socket 11a first sleeve Sb1, Sb2 through hole 11b sphere 11c of the divided body H radial second sleeve 11d first spring 11e second 3 Sleeve 11f 2nd spring 11g Seal member 11h Seal ring 11i Seal retainer 12 Plug 12a Part to be inserted into the 1st sleeve 12b Locking groove 12c Annular convex portion 12d Large diameter cylinder 12e Seal retainer 13 1st recess 14 Convex part 15 Plug guide 16 Locking claw 17 Second convex part 17a Tapered part 17b Small convex part s Side surface of second convex part 18 Second concave part 18a Tapered guide surface 18b Small convex part receiving part

Claims (1)

At least one of the connected pipes is composed of a jet pipe (2) provided with a nozzle (3), and the connected pipes are detachably connected to each other via a pipe joint (10).
The pipe joint (10) is a socket (11) in which a first sleeve (11a) and a second sleeve (11c) that cannot rotate relative to the outer periphery of the first sleeve and is slidably mounted in the axial direction are combined. A plug (12) inserted inside the first sleeve (11a), a sealing member (11 g) that tightly seals between the socket (11) and the plug (12), and the socket (11). ), A locking mechanism that holds the plug (12) inserted into the plug (12), and a positioning mechanism that matches the phases of the socket (11) and the plug (12).
The positioning mechanism is composed of a first concave portion (13) and a first convex portion (14) provided corresponding to the first sleeve (11a) and the plug (12) and fitted to each other.
The plug (12) is inserted into the socket (11) while the second sleeve (11c) is pulled to the unlock point, and the socket (11) and the plug (12) are in phase with each other. The first concave portion (13) and the first convex portion (14) are fitted in a non-circular shape, and the plug (12) is inserted to the end point.
A liquid spraying device configured such that the second sleeve (11c) is returned to the lock point at the insertion end point and the insertion state of the plug (12) into the socket (11) by the lock mechanism is maintained. It ’s a jet unit,
A plug guide (15) mounted on the outer periphery of the plug (12) so as not to rotate relative to the plug and to move relative to the axial direction is provided, and the plug guide (15) is provided with the plug (12). The plug guide (15) and the second sleeve (11c) are in a position where they are abutted against the tip of the second sleeve (11c) that has moved to the lock point at the position where it is inserted into the socket (11) to the end point. In addition, a visible second convex portion (17) protruding in the axial direction and a visible second concave portion entering the axial direction are fitted to each other by matching the phases of the socket (11) and the plug (12). (18) is provided ,
The second convex portion (17) has a tapered portion (17a) whose side surfaces (s, s) are inclined toward the tip end side of the convex portion toward each other, and the second concave portion (18). It is possess guide surfaces of the tapered corresponding to the tapered portion (17a) and (18a) on the inlet side,
The second convex portion (17) is provided on the plug guide (15) so that the tip of the tapered portion (17a) and the root of the first convex portion (14) are aligned in the axial direction, and further. The second convex portion (17) has a small convex portion (17b) having both side surfaces parallel to the axial center protruding from the tip of the tapered portion (17a) in the axial direction. recess (18) is the small protrusions (17b) is噴管unit liquids spraying device that Yusuke small protrusions receiving portion that fits to adapt (18b) on the rear end side.

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