JP2537404Y2 - Spray tube opening and closing device for liquid spraying device - Google Patents

Description

[Detailed description of the present invention] Industrial application field The present invention provides a spraying machine such as a control machine, a sprinkler or a liquid fertilizer through a lifting link behind a traveling machine (this machine) such as a riding rice transplanter. The present invention relates to a jet pipe opening / closing device of a liquid spraying device connected thereto.

2. Description of the Related Art The applicant of the present invention attaches and detachably attaches a spraying machine equipped with a jet tube to the rear of the machine via an elevating link with one touch, and adjusts the position of the jet tube with the jet tube. It has been proposed to be able to freely switch between a working posture oriented downward by a posture switching mechanism, a headland turning posture oriented backward, and a storage posture oriented upward (Japanese Utility Model Application No. 1-31918). In addition, in the above-described structure, a cock for opening and closing the injection tube is provided in the discharge-side conduit of the injection tube, and a cam for operating the cock is provided, and the injection tube is in the working posture. At times, the cock is kept open, and the cock is interlocked with the switching operation of the injection pipe via a cam so that the cock is closed when the working posture is switched to the non-working posture.

The present invention is related to the improvement, and even if the position adjustment at the time of assembly is defective or some external force is applied to the injection tube etc., the roller comes off the cam and the open / close switching operation of the cock becomes impossible. In addition, there is no possibility that the main part of the injection pipe opening / closing device will be damaged or deformed, and the liquid spraying operation can always be performed smoothly and reliably.

Means for Solving the Problems Therefore, the spray tube opening and closing device of the liquid spraying device according to the present invention is provided with a working posture in which the spray tube for spraying liquid is directed downward and a non-working posture in which the spray tube is rotated and retracted upward. Switchable configuration,
A cock for opening and closing the injection pipe is provided in the discharge side pipe of the injection pipe, and a cam for operating the cock is provided, and when the injection pipe is in the working posture, the cock is kept open, and from the working posture. In a configuration in which the cock is interlocked with the switching operation of the injection tube via a cam so that the cock is closed when switched to the non-working posture, a grooved roller is supported at the tip of the switching arm of the cock, and Is provided over the entire circumference of the injection tube rotation shaft portion, and the cam is engaged with the groove of the roller in a lap-like manner regardless of the position of the cam and the roller.

Operation During spraying work, the work is performed with the spray tube set in a downward-oriented working posture with the tube hanging down between the crop strips. It switches to the open state. Also, when turning the aircraft on a headland or the like, or when retracting the aircraft, the jet tube is rotated upward and retracted, but at this time, the cam rotates integrally with the jet tube in conjunction with the operation of switching the jet tube position. Then, the switching arm of the cock automatically switches from the open state to the closed state. Regardless of the positional relationship between the cam and the roller, the cam is held in a state of being wrapped in the groove of the roller so that the roller does not come off the cam.

Embodiment The configuration of the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a traveling machine body (this machine) of a paddy field working vehicle (in the illustrated example, a riding rice transplanter) having a front wheel 2 and a rear wheel 3 and having an engine 4 mounted on a front portion, and a rear link from a top link 5 and a lower link 6. A spraying machine (control device) S equipped with a liquid tank (chemical solution tank) T is detachably mounted via the lifting link 7, and the control device S is connected to a hydraulic cylinder (not shown) connected to the lifting link 7. It is possible to move up and down while maintaining a more horizontal posture. R is a hydraulic operation lever, and one lever R can control both the hydraulic valve and the PTO clutch at the same time. Reference numeral 8 denotes a main unit side hitch provided on the free end side of the lifting link 7.
On the other hand, a work machine side hitch 9 fixedly mounted on the front column 10a side of the base frame 10 of the pest control machine S is detachably connected. Reference numeral 8a denotes a U-shaped pin seat provided on an upper portion of the machine side hitch, which receives the starting point pin 9a which is laterally mounted on the work machine side hitch 9 by the pin seat 8a when the work machine is connected. K is a ground support seat fixed to the lower end side of the front column 10a.

The pest controller S includes a driving part a provided in the base frame 10, a tank part b erected on the base frame 10 so as to be movable forward and backward, and an injection pipe part c provided behind the base frame 10. . That is,
The drive unit a fixes the dynamic injection pump 12 in the base frame 10 via the base 11, and connects the input pulley shaft 15 to the PTO shaft 13 on the machine 1 side via the universal joint shaft 14 in the base frame 10. At one lower side, an intermediate pulley shaft 16 is rotatably supported at an intermediate upper portion in the base frame 10, and the dynamic injection pump 12 is driven by belt transmission. N
Is a belt cover.

A guide rail 17 is provided in the front and rear direction on both left and right ends of the upper end of the base frame 10 as a tank portion b.
A liquid tank T made of synthetic resin is mounted on the top 17 so as to be movable and displaceable in the front-rear direction above the hitch portions 8 and 9 via a tank receiving frame 18. Reference numeral 19 denotes a rotator rotatably supported on the tank receiving frame 18 so as to roll on the guide rail 17. 20
Is a stopper for regulating the tank movement range provided on the rear end side of the base frame 10, and a similar stopper (not shown) is also provided on the front end side of the base frame.

21 is a tank lid, 22 is a suction hose connecting the tank T and the dynamic jet pump 12, and 23 is a spill pipe.

The movement operation section 24 of the tank T is provided on the tank T side so as to face the driver's seat D side of the machine 1. That is, an operating handle 25 is integrally protruded forward from the upper central portion of the front surface of the tank receiving frame 18, and the lock lever 2 is attached to the grip 25a of the handle 25.
A lock pin 28 urged upward by a bullet 27 is mounted on the upper frame body 10d side of the base frame 10 via a bracket 29 so as to be able to protrude and retract toward the tank receiving frame 18 side. And lock lever 26 by wire 30
On the 18 side, one or a plurality of engagement holes (not shown) into which the lock pins 28 are inserted and locked are provided in the front-rear direction.

Next, the injection tube portion c is configured as follows. That is,
Square pipe 32 through U bolt 31 to rear support 10b of base frame 10
A vertically movable adjustment is fixedly mounted horizontally, and a jet pipe driving case 33 is fixed near the left and right middle of the square pipe 32, and the rotating shaft portion 34a of the foldable long boom 34 is rotatable in the case 33. A plurality of spout tubes 35 having spouts 35a on both left and right sides are provided at the boom 34 at a required interval corresponding to the interval between the crop strips so that the intervals can be adjusted. The injection pipe 35 has a three-groove drive fixed to the operation lever 36 of the injection pipe attitude switching mechanism M provided on the side of the driver's seat D and to the operation lever 36 and the rotating shaft portion 34a in the injection pipe drive case 33. The working posture (the state shown by solid lines in FIGS. 2 and 7) is directed downward by a pair of operating wires 37 and 38 connecting the roller E, and the non-working posture retracted upward, that is, is directed backward. It is configured to be switchable between a rotation posture (a state shown in phantom line B in FIG. 2) and a storage posture standing upward (a state shown in phantom line C in FIG. 2). The pump 12 is in communication with a discharge hose 39. Reference numeral 40 denotes a lever case, which is detachably attached to the machine 1 via a bracket 41 and a wing nut 41a.

The injection tube attitude switching mechanism M is configured as follows. That is, the grooved drive roller 44 is fixed to the fulcrum shaft 43 rotatably supported with respect to the lever case 40 having the engagement groove 40a, and the operation lever 36 is fixed via the elastic plate 45 with the locking portion 45a. One end of each of the wires 37 and 38 is fixed to the groove 44a of the drive roller 44 so as to be close to each other while facing each other.
7, 38 intersect in the middle and extend rearward substantially in a straight line, and the extended end side is stopped in the grooves E ₁ and E ₂ of the drive roller E in the injection tube drive case 33 in a half-wrapped state. Wearing,
The linear arrangement of the wires 37 and 38, combined with a structure that makes it difficult for water to enter the inner portion, reduces unnecessary load on the wires and enables smooth remote control from the driver's seat D position. 46 is a washer, 47 is a split pin, and 48 is a spring. Incidentally, the upper and lower operation of the driving roller E groove E ₃ and is between the stay 49 to have an upper pivot load weight equivalent of the spring pressure of噴管to the spring 50 the spring 50 is stretched operating lever 12 of light It is considered so that it can be done.

Now, a cock 51 for opening and closing the injection tube 35 is provided in the discharge side pipe H of the injection tube 35, and a cam 52 for operating the cock 51 is provided near the injection tube 35, respectively. When the cock 51 is in the open state, the cock 51 is interlocked with the switching operation of the injection pipe 35 via the cam 52 so that the cock 51 is closed when the working posture is switched to the non-working posture. ing. That is, the cock 51 disposed in the vicinity of the injection pipe 35 is fixed to the mounting seat 55 fixed to the square pipe 32 via the clamp portion 54 of the bracket 53 with the stopper 53a with the screw 56, and the switching arm 57 of the cock 51 is provided. A roller 59 is rotatably supported by a pin 58 on the leading end of the roller 59, and a cam 52 integrally fixed to a rotating shaft portion 34a via a boss 60 enters a groove 59a having a U-shaped cross section provided on the outer periphery of the roller 59. The opening and closing of the cock 51 is controlled. A spring 62 is stretched between the switching arm 57 and the bracket 53 to constantly urge the arm 57 downward. The inlet side of the cock 51 is connected to the discharge hose 39 on the dynamic injection pump 12 side, and the outlet side is connected to the T-shaped joints 63 and 64 and the discharge hose 3 on the injection pipe 35 side.
It is connected to each injection tube 35 via 9. 65 and 66 are stop bolts and 67 is a stay.

Incidentally, the cam 52 has a main cam portion 52a having a large protrusion amount.
And a flange-shaped sub-cam portion 52b integrally protruded from the outer peripheral surface of the boss 60 by a distance w between the front and rear rising start ends of the main cam portion 52a.
The configuration is such that it is provided over the entire circumference of the injection tube rotating shaft portion (rotating shaft) 34a through 0. When the cam 52 and the roller 59 are in any position, the cam 52
The groove 59a of the 59 is configured to be engaged and held in a lap shape. In the embodiment, when the main cam portion 52a is in a free state with respect to the roller 59 (between the storage position (c) in which the injection tube 35 is directed upward from the body turning position (b) in the rearward direction), the roller The lap amount between the cam 59 and the cam (sub cam portion 52b) is set to X, and a small gap S (X> S) is maintained between the roller groove bottom portion and the cam 52.

Although the control apparatus has been described in this embodiment, the present invention can be applied to a liquid spraying apparatus such as a water sprayer or a liquid fertilizer.

In the above configuration, when performing a disinfection / control operation of crops such as soybeans, the control device S is connected to the machine 1 and the tank T is controlled.
Is set at the forefront position of the base frame 10. Next, tank T
After the medicine to be sprayed is injected into the boom 34, the operating lever 36 of the injection tube attitude switching mechanism M is turned from the storage position C to the working position A in FIG. It is engaged with the engagement groove 40a, and is set to the working posture in which the injection tube 35 is directed downward. That is, after the operation lever 36 is tilted sideways to disengage the elastic plate 45 and the engagement groove 40a, the operation lever 3
6 is pushed down from the storage position C to the working position A, the two rollers 37, 38 move in the forward and backward reverse directions by the rotation of the drive roller 44 (the amount of movement is the same), and the drive roller E of the boom rotation part is moved.
And the boom 35 is rotated substantially half a direction in the opposite direction to the roller 44, and the injection pipe 35 is switched from the storage posture oriented upward to the rear side of the tank to the work posture oriented downward, so that the operation lever 36 is moved at that position. When released, the operation lever 36 returns elastically and is locked in the engagement groove 40a at the working position. By the way, the rotation of the boom 35 causes the cam 52 to rotate integrally with the boom 35, so that the main cam portion 52a of the cam 52 is connected to the roller groove 5 of the cock switching arm 57.
9a, the arm 57 is pushed up from the state shown in the phantom line in FIG. 2 to the state shown in the solid line in FIG. 2 against the spring 62, the cock 51 is opened, and the dynamic injection pump 12 and the injection pipe 35 are in communication. Becomes Therefore, if the PTO clutch is engaged and the machine 1 is run, the medicine in the tank T is sucked by the suction hose 22 and the dynamic injection pump 1
2. Sprayed from the left and right sides of the crop leaf stem from the spout 35a of the spout 35 sequentially through the discharge hose 39 and the cock 51. At the time of turning the body at the ridge end, the operation lever 36 is rotatably locked at the turning position (b) to switch to the headland turning posture in which the injection pipe 35 is directed rearward. As a result, the cam 52 pivots downward from the state shown by the solid line in FIG. 2, so that the arm 57 pivots in the opposite direction to the above until the arm 57 abuts against the stopper 53a by the spring 62 and stops. Therefore, the cock 51 is closed, and the ejection of the chemical solution is automatically and promptly stopped. As described above, since the pest control can be performed only by operating the operation lever 36 of the injection pipe attitude switching mechanism M while the PTO clutch is in the engaged state, the lever operation during the operation is simplified, and the burden on the operator is reduced. In addition, since it is not necessary to stop the dynamic injection pump 12 every time the body turns, it is possible to prevent a back dripping phenomenon due to a large amount of chemical liquid during turning.

By the way, the cam 52 (the main cam portion 52a or the sub cam portion 5)
2b) is fitted into the groove 59a of the roller 59 and is always kept in a wrapped state, so that the roller 59 does not come off the cam 52. In particular, even when the roller 59 and the cam 52 are in a free state (the cock 51 is closed) in the storage position of the injection pipe 35 or between the swirling position and the storage position, the auxiliary cam portion 52b is inserted in the roller groove 59a.
Is inserted (wrap width X), so that even if the position adjustment at the time of assembling is defective or some external force is applied to the long boom 34, the injection tube 35, or the like, the groove 59a of the roller 59 is used. There is no danger that the cam 52 will be disengaged and the cock opening / closing switching operation will not be possible, and there will be no risk of damaging or deforming the main part of the injection tube opening / closing device, so that the liquid spraying operation can always be performed smoothly and reliably.

Effect of the Invention Since the present invention is configured as described above, the cock can be automatically opened and closed only by the switching operation of the injection pipe posture at the time of turning the aircraft, so that complicated lever operation can be simplified. The cam is always engaged and held in a state of being wrapped in the groove of the roller, while preventing the back dripping phenomenon to a minimum. Even if external force is applied to the nozzle, there is no danger that the roller will come off the cam and the opening / closing switching operation of the cock will not be possible, or that the main part of the injection tube opening / closing device will be damaged or deformed. Can always be performed smoothly and reliably.

[Brief description of the drawings]

1 is a rear view of the main part, FIG. 2 is a side view of the main part, FIG. 3 is a plan view of the main part, FIG. 4 is an explanatory view of the operation of the nozzle position switching mechanism, and FIG. Front view of operation unit of attitude switching mechanism, sixth
Fig. 7 is a piping diagram of the control device, Fig. 7 is a side view showing the state where the control device is connected to the riding rice transplanter, and Fig. 8 is a rear view showing that the control device is connected to the riding rice transplanter. is there. 1 ... traveling body, 34a ... injection tube rotating shaft (boom rotating shaft), 35 ... injection tube, 51 ... cock, 52 ... cock operating cam, 52a ... main cam, 52b ... … Secondary cam, 59…
... roller, 59a ... roller groove, H ... discharge pipe line of injection pipe, M ... injection pipe attitude switching mechanism, S ... spraying machine (controller).

Claims (1)

(57) [Scope of request for utility model registration] An injection tube for spraying a liquid is configured to be switchable between a working position in which the spray tube is directed downward and a non-working position in which the spray tube is rotated and retracted upward. A cock for opening and closing the cock is provided, and a cam for operating the cock is provided, and the cock is kept open when the injection tube is in the working posture, and the cock is closed when switching from the working posture to the non-working posture. In a configuration in which the cock is interlocked with the switching operation of the injection tube via a cam, a roller with a groove is supported at the tip of the switching arm of the cock, and the cam is provided over the entire circumference of the rotary shaft portion of the injection tube, A spray tube opening / closing device for a liquid spraying device, wherein the cam is engaged with the groove of the roller in a wrapped manner regardless of the position of the cam and the roller.