JP2005168381A - Implement for paddy field - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To readily carry out insertion and removal operation of a coupler. <P>SOLUTION: In the subject implement for a paddy field, with which an operation device 7 for a paddy field is detachably connected to a rise and fall link mechanism 5 equipped with a traveling machine body 3 and the coupler 36 is laid at the middle part of a harness 35 for connecting an electric system mounted on the operation device 7 for a paddy field to an electric system mounted on the traveling machine body 3, the stationary side connection part 36A of the coupler 36 is fixed to the rise and fall link mechanism 5 or the operation device 7 for a paddy field, and the stationary side connection part 36A is installed so that its connection end has a transverse position toward the lateral outside of the machine body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a paddy field work machine in which a paddy field work device is detachably connected to a lifting link mechanism provided in a traveling machine body.

As the paddy field work machine, there is known a structure in which a seedling planting device or a weeding device can be replaced with a lifting link mechanism provided in a traveling machine body (see, for example, Patent Document 1).
JP 2003-204708 A

  The paddy field work machine is equipped with a control device that controls the lifting or rolling of the paddy field work device, and the sensors provided in the paddy field work device and the control device provided in the traveling machine body are connected by a harness. In the paddy field machine capable of replacing the paddy field work device, a coupler is interposed in the middle portion of the harness, and the fixed side connection portion of the coupler is attached to the lifting link mechanism or the like.

  In general, a coupler interposed in the middle of a harness is provided so as to be inserted and removed in a direction in which the harness is arranged, and the harness extends in the front-rear direction across the front traveling machine body and the rear paddy field work apparatus as described above. The coupler was mounted in a posture to be inserted and removed in the front-rear direction.

  However, in the paddy field work machine having the above-described configuration, the coupler is disposed between the traveling machine body and the paddy field work apparatus. The coupler is inserted and removed in the front-rear direction with the body placed between the paddy field work device, making it difficult to see the connection end of the coupler and making the operation easy. In addition, since the coupler is inserted and removed in a narrow working space in the front-rear direction, there is a risk of hitting a nearby device with a force of strong extraction when removing the coupler that is tightly fitted. It was.

  The present invention has been made paying attention to such a point, and has as its main object to make it easy to insert and remove a coupler.

A first invention is a paddy field work machine in which a paddy field work device is detachably connected to a lifting link mechanism provided in a traveling machine body,
A coupler is interposed in an intermediate portion of a harness connecting the electric system provided in the paddy field working device and the electric system provided in the traveling machine body, and the fixed side connecting portion of the coupler is connected to the lifting link mechanism or the paddy field working device. In addition to being attached, the fixed-side connecting portion is attached in a lateral orientation in which the connecting end faces laterally outward of the fuselage.

  According to the above configuration, in order to insert / remove the coupler when the paddy field working device is attached / detached, the operator inserts / removes the coupler from the lateral direction with the body inserted between the traveling machine body and the paddy field working device. In this case, since the connection end of the fixed side connection part faces the outside of the fuselage, it can be inserted and removed without difficulty while checking the insertion position, and it can be pulled out to a wide space outside. There is no risk of hitting a hand against a nearby device even if the momentum is excessive.

  Therefore, according to the first aspect of the present invention, it is possible to easily and safely perform the coupler insertion / extraction operation by a simple modification that rationally sets the coupler installation direction.

According to a second invention, in the first invention,
The cap is configured to be detachable with respect to the connection end of the fixed side connection portion of the coupler.

  According to the above configuration, when removing the paddy field work apparatus and washing the car, the scattered water or mud scattered inside the fixed side connection part by closing the cap by attaching a cap to the connection end of the fixed side connection part in the separated coupler. Intrusion into the vehicle can be prevented, the above-mentioned effects of the first invention can be brought about, and connection failures and short-circuits can be avoided when using the coupler connection after car washing.

According to a third invention, in the first or second invention,
A cover that covers the entire coupler is provided in the vicinity of the fixed-side connecting portion.

  According to the above configuration, even when the coupler is connected, the cover can prevent the muddy water scattered by the paddy field work from landing on the coupler and adhere to the coupler. It is possible to prevent the mud from flowing into the connection end and handle it with less fouling.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a paddy field machine configured to a rice transplanter specification. This paddy field work machine is equipped with an elevating link mechanism 5 of a parallel four-link structure that is driven and raised by a hydraulic cylinder 4 at the rear of a four-wheel drive type traveling machine body 3 having a front wheel 1 and a rear wheel 2. The hitch 6 provided at the rear end of the link mechanism 5 has a structure in which a seedling planting device 7 of 6 or 8 planting specifications is detachably connected as an example of a paddy field working device. Further, in this example, the fertilizer application specification is provided in which the fertilizer application device 8 is provided at the rear portion of the traveling machine body 3.

  The seedling planting device 7 is supported by a lower part of a vertically long connecting frame 10 detachably engaged with and connected to the rear end of the link mechanism 5 so as to be able to roll around a fulcrum p. Are mounted on the left and right of the rear part of each planting case 12, the seedling stand 11 that reciprocates horizontally, three (6 specification) or 4 (8 specification) planting cases 12 arranged in parallel in a cantilevered rear stem. The rotary planting mechanism 13 and a plurality of leveling floats 14 for leveling the planting locations on the rice field are provided.

  The seedling planting device 7 is controlled to be lifted and lowered as follows.

  Among the leveling floats 14 arranged in parallel, the center leveling float 14 is used as a sensor float SF for detecting the height of the seedling planting device 7 relative to the rice field. The sensor float SF is supported so as to be able to swing up and down around the rear fulcrum a like the other leveling floats 14, and the vertical swing displacement of the sensor float SF is detected by a rotary potentiometer 15. The operation of the electromagnetic control valve 16 of the hydraulic cylinder 4 is controlled based on the detection information (see FIG. 9).

  That is, when the traveling machine 3 moves up and down or pitches back and forth due to the unevenness or inclination of the cultivator in the field and the seedling planting device 7 starts to float and sink with respect to the rice field, the sensor float SF is moved up and down as the swinging displacement. When the seedling planting device 7 is controlled to be lifted or lowered in the direction in which the sinking is detected and the sinking is eliminated, the seedling planting device 7 is maintained in a predetermined height range with respect to the rice field, so that a stable planting depth is achieved. Is secured.

  As shown in FIG. 3, a rolling drive unit 17 is provided at the upper end of the connection frame 10. The rolling drive unit 17 has a structure in which a wire 20 connected to a pulley 19 that is driven forward and backward by an electric motor 18 and connected to the left and right portions of the seedling planting device 7 is connected via a buffer spring 20a. The electric motor 18 is actuated and controlled based on the left / right inclination information detected by the inclination sensor 21 installed at an appropriate position of the seedling planting device 7, and the traveling machine body 3 is inclined in the left / right direction due to unevenness and inclination of the cultivator. Even so, the rolling control is performed so that the seedling planting device 7 is stably maintained in the horizontal horizontal posture (including the dead zone), and the planting depth of the entire strip is stabilized.

  The fertilizer applicator 8 includes a hopper 23 for storing powdered fertilizer, an electric blower 25 for wind-feeding fertilizer fed from the hopper 23 by a feeding mechanism 24, and a planting line attached to each leveling float 14. Grooving device 26, supply hose 27 for guiding fertilizer conveyed by wind power to each groove forming device 26, and the like are provided, and fertilizer is applied by each groove forming device 15 near the side of the seedling planting position as the machine advances. Grooves are formed, and fertilizer is supplied and buried in the fertilized grooves.

  The seedling planting device 7 is provided with the following electrical system in addition to the electrical system for lifting control and rolling control (see the block diagram in FIG. 9).

  The seedling placement section for each strip of the seedling platform 11 is provided with a seedling feeding belt 31 that vertically feeds the placed seedling toward the seedling removal site at the lower end of the seedling platform, A seedling remaining amount sensor 32 that detects the passage of the end using a limit switch is provided for each line, and that the seedling remaining amount sensor 32 indicates that the loaded seedlings of any of the lines have been consumed to a set amount or less. Is detected by the notification mechanism 33 provided with a warning lamp, a warning buzzer, etc., and the seedling replenishment is urged.

  Further, a fertilizer clogging sensor 28 that detects the adhesion of fertilizer using a change in the conductive resistance value is provided inside each groove grooving device 26. When it is detected that clogging has occurred, the notification mechanism 33 notifies the user of the clogging operation.

  And the electric system equipped on the traveling machine 3 side and the electric system equipped on the seedling planting device 7 side are collectively connected by a harness 35, but the seedling planting device (paddy field working device) 7 is removed. Therefore, a coupler 36 is interposed in the middle of the harness 35.

  As shown in FIGS. 6 and 8, the coupler 36 includes a fixed side connection portion 36 </ b> A connected to the electrical system on the traveling machine body 3 side and a separation side connection portion 36 </ b> B connected to the electrical system on the seedling planting device 7 side. The fixed side connecting portion 36A is attached and fixed to the support base 37 provided on the left side surface of the rear portion of the upper link 5a constituting the elevating link mechanism 5 in a sideways posture in which the connecting end faces the aircraft laterally outward, The separation side connection part 36B is inserted and connected or removed from the lateral side.

  It should be noted that a waterproof cap 38 can be attached to the connection end of the fixed side connection portion 36A from which the separation side connection portion 36B has been extracted and separated. 37 is attached to an upward U-shaped cap holding portion 39 continuously provided at the rear portion of the rear portion 37 and can be held via a pair of front and rear locking projections 38a. One end of a cover 40 made of a rubber sheet is attached to the support base 37, and the free end portion of the cover 40 that covers the entire coupler from above is attached to a headed pin 41 fixed to the front end of the support base 37. By locking, muddy water can be prevented from adhering to the coupler 36 during operation in the paddy field.

  In the case of separating the seedling planting device 7 from the lifting link mechanism 5, the stand bar 45 is attached to the raised seedling planting device 7, and then the seedling planting device 7 is lowered to perform the separation operation. As shown in FIG. 5, the separated seedling planting device 7 is stably placed on the ground. Here, a pair of left and right stand mounting bosses 46 are provided on the front side of the seedling planting device 7 using a seedling support column 30, and a planting case 12 is used on the rear side of the seedling planting device 7. One (6 strips) or two (8 strips) stand mounting bosses 47 are provided, and as shown in FIGS. 10 (a) and 10 (b), a stand having a caster ring 48 at the lower end. After the bar 45 is inserted into the respective stand mounting bosses 46 and 47 from below until it comes into contact with the flange 45a on the outer periphery of the bar, a retaining pin 49 is attached to the upper end of the stand bar protruding above the boss. . As shown in FIG. 10C, the retaining pin 49 is provided with a spring ring 50 that can be switched in a forward / reverse direction when the dead point is exceeded, and the retaining pin 49 is inserted into the stand bar 45. Thereafter, the retaining ring 49 can be held in the mounted state by reversing and swinging the spring ring 50 and engaging with the stand bar 45, and the retaining pin by reversing and swinging the spring ring 50 to the original posture. 49 can be extracted from the stand bar 45.

  In the above embodiment, the case where the fixed side connection portion 36A of the coupler 36 is attached to the lift link mechanism 5 is exemplified. However, the fixed side connection portion of the coupler 36 connected to the electrical system on the seedling planting device side is used as the seedling planting device. 7 can be mounted and fixed in an appropriate position in a laterally outward position, and the separation side connecting portion of the coupler 36 can be connected to the electrical system on the airframe side.

  Moreover, in the said Example, although the case where the seedling planting apparatus 7 was connected to the raising / lowering link mechanism 5 as a paddy field working apparatus, the paddy field weeding apparatus, the paddy field direct seeding apparatus, etc. were connected as a paddy field working apparatus as needed. Can do.

Whole side view of rice transplanter Overall plan view of rice transplanter Rear view of the seedling planting device as seen from the front Side view of removed seedling planting device Rear view of removed seedling planting device Front view of harness connection part Side view of harness connection part Exploded perspective view of harness connection part Block diagram showing the outline of the control system Side view (a), (b) showing the mounting structure of the stand bar and plan view of the retaining pin (c)

Explanation of symbols

3 traveling machine body 5 elevating link mechanism 7 paddy field work device (seed planting device)
35 Harness 36 Coupler 36A Fixed side connection 38 Cap 40 Cover

Claims (3)

A paddy field work machine in which a paddy field work device is detachably connected to an elevating link mechanism provided in the traveling machine body,
A coupler is interposed in an intermediate portion of a harness connecting the electric system provided in the paddy field working device and the electric system provided in the traveling machine body, and the fixed side connecting portion of the coupler is connected to the lifting link mechanism or the paddy field working device. A paddy field work machine characterized in that the fixed side connection portion is attached in a lateral orientation in which the connection end faces laterally outward of the machine body.   The paddy field work machine according to claim 1, wherein a cap is detachably attached to a connection end of the fixed side connection portion of the coupler.   The paddy field work machine according to claim 1 or 2, wherein a cover that covers the entire coupler is provided in the vicinity of the fixed-side connecting portion.

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