JP2023153977A - Transplanter - Google Patents

Abstract

To provide a transplanter enabling lifting/lowering operation of a planting tool with a simple structure.SOLUTION: A lifting/lowering and opening/closing mechanism U comprises: a lifting/lowering arm 8 which lifts or lowers a planting tool 6; an auxiliary link 9 which is located below the lifting/lowering arm 8, and holds an attitude of the planting tool 6; an interlocking crank arm 10 which connects and interlocks the lifting/lowering arm 8 with the auxiliary link 9; a locking plate 14 to which the lifting/lowering arm 8 and the auxiliary link 9 are attached, and which is configured to be able to lock back and forth; an opening/closing interlocking arm 11 with which one end of an opening/closing wire 7 for opening or closing the planting tool 6 with pulling operation is interlocked; an opening/closing cam 12 which pulls and operates the opening/closing wire 7 by rotatably operating the opening/closing interlocking arm 11 with coming into contact with a cam contact roller 11a disposed on the opening/closing interlocking arm 11; and a rotary drive shaft 13 which vertically moves the lifting/closing arm 8 while rotating the opening/closing cam 12. The rotary drive shaft 13 is connected with the lifting/lowering arm 8 in a middle part of the lifting/lowering arm 8.SELECTED DRAWING: Figure 2

Description

The present invention relates to a transplanter for planting seedlings by moving a planting tool up and down.

Conventionally, a transplanter for planting seedlings is equipped with a bird's beak-shaped planting tool that can move up and down, and this planting tool picks up vegetable seedlings (hereinafter simply called "seedlings") at the upper end (so-called top dead center) of its up-and-down trajectory. ), it plunges into the field ridge at its lower end (the so-called bottom dead center) and opens, leaving the seedlings in the hole and rising while closing and receiving seedlings again. By repeating (lifting/lowering operations and opening/closing operations), seedlings are continuously planted in the field.

Here, the transplanting machine of Patent Document 1 includes a lifting opening/closing mechanism that lifts and lowers the planting tool and opens/closes it, and the lifting opening/closing mechanism includes a lifting arm that lifts and lowers the planting tool, and a lifting arm that lifts and lowers the planting tool, and maintains the posture of the planting tool. It is configured with a sub-link.

Japanese Patent Application Publication No. 2010-98957

Here, the lifting/lowering opening/closing mechanism of the transplanter disclosed in Patent Document 1 connects the lifting arm and the auxiliary link with crank arms that each rotate by obtaining driving force from the same transmission system, and the crank arms are connected to each other. By rotating in synchronization, the crank lifting arm and the sub link are moved up and down, respectively, and the planting tool is raised and lowered. However, as a result, the components become complicated, and unless the crank arms and other members are assembled accurately, the structure tends to cause a phase difference in the rotation of each crank arm. Due to the occurrence of this phase difference, the posture of the planting tool is disturbed when going up and down, resulting in a problem that the planting accuracy is reduced. Furthermore, as the planting tool is repeatedly raised and lowered, a phase difference occurs between the crank arms due to wear of the component parts, and a similar problem may occur.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a transplanter that enables the raising and lowering of a planting tool with a simpler configuration, and to solve these conventional problems.

In order to achieve the above object, the first invention
a planting tool (6) for planting the dropped seedlings;
A transplanting machine equipped with a lifting/lowering opening/closing mechanism (U) for lifting/lowering and opening/closing the planting tool (6),
The lifting/lowering opening/closing mechanism (U) includes a lifting arm (8) that lifts and lowers the planting tool (6);
a sub link (9) that is located below the lifting arm (8) and maintains the posture of the planting tool (6);
an interlocking crank arm (10) that connects and interlocks the lifting arm (8) and the sub link (9);
a swinging plate (14) to which the elevating arm (8) and the sub-link (9) are attached and configured to be able to swing back and forth;
an opening/closing interlocking arm (11) connected to one end of an opening/closing wire (7) that opens and closes the planting tool (6) by a pulling operation;
An opening/closing cam (12) that rotates the opening/closing arm (11) and pulls and operates the opening/closing wire (7) by contacting with a cam contact roller (11a) provided on the opening/closing arm (11). and,
A rotary drive shaft (13) that moves the lifting arm (8) up and down while rotating the opening/closing cam (12),
It is characterized in that the rotational drive shaft (13) is connected to the lifting arm (8) at a midway portion of the lifting arm (8).

According to the first invention, it is possible to raise and lower the planting tool with a simple configuration, and when the seedlings are long, the seedling planting tool 6 closes and pinches the seedlings while they are being raised, causing them to be pinched after planting. Malfunctions are prevented.

A second invention is, in the first invention,
A seedling supply device (5) for supplying seedlings to the planting tool (6) is provided above the planting tool (6),
The seedling supply device (5) has a structure in which a plurality of seedling receiving cups (5a) operate in a circular orbit as receptors for receiving seedlings inputted by the operator, and the seedling feeding device (5) moves from the seedling receiving cups (5a) to the planting tool. (6) It is configured to be dropped at a timing corresponding to the lifting and lowering,
The planting tool (6) includes a cylindrical guide tube (6b) provided at the top of the planting tool (6) to receive seedlings from the seedling supply device (5), and A beak-shaped beak member (6c) that is provided below the tube (6b) and plants seedlings by opening and closing operations, and an opening and closing member (6d) that opens and closes the beak member (6c),
The opening/closing member (6d) includes a hopper holder (6e) connected to the opening/closing wire (7) and opening/closing the attached beak member (6c) by pulling and loosening the opening/closing wire (7),
The hopper holder (6e) includes two receiving arms (6f, 6g) that receive the two cables (7a, 7b) that are the opening/closing wires (7),
The two receiving arms (6f, 6g) are arranged so that the height positions of their upper ends are different, and the upper part of the receiving arm (6g) with the higher upper end of the two receiving arms (6f, 6g) is The cable (7b) attached to the cable is arranged in a downwardly inclined position.
According to the second aspect of the invention, since the opening/closing wire is laid out in an inclined position, contact with surrounding members is suitably prevented.

A third invention is the first or second invention, comprising:
A cleaning device (W) that supplies cleaning water to the planting tool (6) is provided,
The cleaning device (W) has a crank plate (w2) rotatably attached to a power transmission shaft (w1) that protrudes from one left and right side of the aircraft body, and the crank plate (w2) has a long hole with the front and rear sides being longitudinal. A long slide hole (w41) is formed, a crankshaft (w5) is inserted into the long slide hole (w41) so as to be slidable back and forth, and one end of the pump rod (w6) is inserted into the crankshaft (w5). The other end of the pump rod (w6) is connected to a pump case (w7) through which wash water is taken in and taken out.

According to the present invention, it is possible to provide a transplanter that enables the raising and lowering of a planting tool with a simpler configuration.

FIG. 1 is a side view of a transplanter according to an embodiment of the present invention. FIG. 2 is a side view of the vicinity of the planting device at top dead center. FIG. 3 is a schematic side view of the planting tool in an open state. FIG. 4 is a perspective view of the main parts of the planting tool. FIG. 5 is a side view of the vicinity of the planting device at the bottom dead center. FIG. 6 is a side view of the main parts around the shock absorber. FIG. 7 is a plan view of the cleaning device. FIG. 8 is a perspective view of main parts of the front part of the cleaning device. FIG. 9 is a sectional view of the main part of FIG. 8. FIG. 10 is a perspective view of the main parts inside the rear part of the cleaning device. FIG. 11 is a side sectional view of the main part of the rear part of the cleaning device. FIG. 12 is a perspective view of the main parts of the front part of the cleaning device according to the modified example. FIG. 13 is a perspective view of the main part of the front part of the cleaning device according to another modification. FIG. 14(a) is a front view of the stand of the transplanter, and FIG. 14(b) is a side view of the main parts. FIG. 15 is a plan view of the vicinity of the mission case of a transplanter according to another embodiment. FIG. 16 is a plan view of the main parts around the crawler. FIG. 17 is an exploded perspective view of an auxiliary step of a transplanter according to another embodiment. FIG. 18 is a perspective view of the main parts around the hydraulic drop prevention mechanism of a transplanter according to another embodiment.

Embodiments specifically constructed based on the above technical idea will be described below with reference to the drawings. In the following description, the side on which the engine E is disposed is referred to as the front, and the opposite side, on which the control handle 2a is disposed, is referred to as the rear. Then, facing the front of the aircraft, the right hand side is the right, and the left hand side is the left. In addition, in the following drawings, the front is indicated by an arrow F as appropriate.

FIG. 1 is a side view of a transplanter according to an embodiment of the present invention.

The basic configuration of this transplanter 1 includes a traveling vehicle body 2 that allows the machine to travel forward, and a planting section 3 that plants seedlings in a field, and a control handle 2a for operation is provided at the rear of the traveling vehicle body 2. The planting unit 3 includes a planting device 4 for planting seedlings, and a seedling feeding device 5 for feeding the seedlings to the planting device 4, and is capable of planting (transplanting) the seedlings inputted by the operator into the field. configured to be possible. The types of seedlings include, for example, onion, rakkyo, garlic, and the like.

In the illustrated example, the traveling vehicle body 2 includes an engine E, a pair of left and right rear wheels 2b that are driven and rotated by the power of the engine E, and a pair of left and right rear wheels 2b that are rotatably supported in front of the rear wheels 2b. The vehicle is equipped with a front wheel 2c.

A mission case 2d that receives the power of the engine E is disposed on the rear side of the engine E, and the mission case 2d has arm-shaped left and right transmission gears on both sides to adjust the height of the aircraft and the left and right heights. Cases 2e, 2e are rotatably arranged, and rear wheels 2b, 2b are supported via these left and right transmission cases 2e, 2e.

At the rear of the mission case 2d, a planting transmission section E2 is arranged which receives the power of the engine E through the transmission case 2d and drives the planting device 4 and the seedling supply device 5 in synchronization with the traveling system. has been done.

The seedling feeding device 5 has seedling receiving cups 5a arranged at equal pitches as receptors for receiving seedlings thrown in by an operator, and is configured in the form of a circular table that rotates in conjunction with a traveling system via a transmission shaft 2f. The planting tool 6 of the planting device 4 is configured to be able to move around a circular trajectory passing through the top dead center position. The individual seedling receiving cups 5a transport the seedlings thrown in by the operator, and drop them at timings corresponding to the raising and lowering of the planting tool 6 (when passing the top dead center).

FIG. 2 is a side view of the vicinity of the planting device 4 at top dead center.

The planting device 4 includes a beak-shaped planting tool 6 that can be opened and closed by receiving a seedling from an opening 6a formed in the upper part, and a lifting/lowering opening/closing mechanism U that moves the planting tool 6 up and down and opens and closes it. .

First, the configuration of the planting tool 6 will be explained.

FIG. 3 is a schematic side view of the planting tool 6 in an open state, and FIG. 4 is a perspective view of essential parts of the planting tool 6.

The planting tool 6 has a cylindrical guide tube 6b provided on the upper part of the planting tool 6 to receive seedlings, and a cylindrical guide tube 6b provided below the guide tube 6b to receive seedlings on the left and right sides, and opens and closes while penetrating into the soil. It includes a beak-shaped beak member 6c that plants seedlings in the field by operation, and an opening/closing member 6d that opens and closes the beak member 6c. The beak member 6c holds the seedlings inside when it is in the closed state, and causes the held seedlings to fall to the outside when it is in the open state.

The opening/closing member 6d is connected to the opening/closing wire 7, and is a mechanism for opening and closing the beak member 6c by pulling and loosening the opening/closing wire 7. This opening/closing member 6d is equipped with a hopper holder 6e that allows the attached beak member 6c to be opened and closed, and this hopper holder 6e has an outer receiving arm 6f for receiving the cable outer 7a of the opening/closing wire 7, and a cable inner 7b for the opening/closing wire 7. It is equipped with an inner receiving arm 6g that receives the end portion, and is normally biased by a spring member in the direction in which the hopper holder 6e closes. However, when the cable inner 7b is pulled against this biasing force, the inner receiving arm 6g The hopper holder 6e on the 6g side rotates and opens, and in synchronization with this, the hopper holder 6e on the outer receiving arm 6f side rotates and opens. As a result, the beak member 6c is also configured to open.

Here, the inner receiving arm 6g is provided longer than the outer receiving arm 6f, so that the inner receiving arm 6g has a different height position of the upper end of the outer receiving arm 6f, and the opening/closing wire 7 Since the inner receiving arm 6g is arranged in an inclined position, the amount of rotation of the inner receiving arm 6g during opening and closing is suppressed, and contact with surrounding members is suitably prevented. In addition, as a modification, it is also possible to provide the outer receiving arm 6f to be longer than the inner receiving arm 6g.

Next, returning to FIG. 2, the lifting/lowering opening/closing mechanism U will be explained.

The lifting/lowering opening/closing mechanism U includes a lifting arm 8 that raises and lowers the planting tool 6, a sub-link 9 that maintains the posture of the planting tool 6, and an interlocking crank that connects and interlocks the lifting arm 8 and the sub-link 9. The arm 10, the opening/closing interlocking arm 11 to which one end of the opening/closing wire 7 for opening and closing the planting tool 6 is connected, the opening/closing cam 12 for rotating the opening/closing interlocking arm 11, and the lifting and lowering while rotating the opening/closing cam 12. A rotational drive shaft 13 that moves the arm 8 up and down, a swinging plate 14 to which the lifting arm 8 and the sub-link 9 are attached and configured to be able to swing back and forth, and a swinging plate that swingably supports the swinging plate 14. and an arm 15.

The lifting arm 8 is mounted so that its front end is pivotally supported by the swing plate 14, and its rear end is connected to the hopper holder 6e of the planting tool 6. A rotary drive shaft 13 is disposed in the middle of the shaft, and when the rotary drive shaft 13 is moved up and down by a crank arm (not shown), the lifting arm 8 also moves up and down on its rear end side, thereby raising and lowering the planting tool 6. There is.

The sub link 9 is disposed below the lifting arm 8, is mounted so that its front end is pivotally supported by the swing plate 14, and its rear end is connected to the hopper holder 6e of the planting tool 6. Thereby, the sub link 9 constitutes a parallel link together with the lifting arm 8, moves up and down, and functions to maintain a constant posture of the planting tool 6 during lifting and lowering.

The interlocking crank arm 10 is formed of a plate-shaped frame material and is arranged in a substantially horizontal position, and the rear end of the lifting arm 8 is rotatably connected to the upper end of the interlocking crank arm 10, and the rear end of the sub link 9 is rotatably connected to the lower end of the interlocking crank arm 10. has been done. As a result, when the planting tool 6 is raised and lowered, a function is achieved in which the distance between the rear end of the lifting arm 8 and the rear end of the sub link 9 is maintained at a predetermined distance while interlocking with each other. Thereby, the lifting arm 8 and the sub link 9 can be moved up and down synchronously with a simple configuration, and it is possible to move the planting tool 6 up and down while maintaining its posture. As a result, it is possible to move the planting tool up and down with a simple configuration, and furthermore, it is possible to suppress the operating load during the up and down movement.

The opening/closing interlocking arm 11 is configured to be rotatable within a predetermined range around a rotational fulcrum 11a, with a cam contact roller 11b at one end and an opening/closing wire 7 at the other end across the rotational fulcrum 11a. One end is connected. The opening/closing interlocking arm 11 is biased counterclockwise in the drawing by a spring member (not shown), but when the opening/closing cam 12 contacts the cam contact roller 11b, it receives a pressing force from the opening/closing cam 12 and rotates clockwise in the drawing. In response to this movement, the opening/closing wire 7 (cable inner 7b) is pulled, and the planting tool 6 is opened.

The opening/closing cam 12 has an eccentric shape, is attached to a rotary drive shaft 13, and is configured to be rotated clockwise in the drawing by being rotationally driven by the rotary drive shaft 13. As a result, the planting tool 6 comes into contact with the cam contact roller 11b near the bottom dead center of the vertical trajectory L, and rotates the opening/closing interlocking arm 11.

The rotational drive shaft 13 is configured to receive driving force from the planting transmission part E2 and to be rotationally driven while moving up and down. This rotational drive shaft 13 is connected to the lifting arm 8 at a midway portion of the lifting arm 8 .

The swinging plate 14 is pivotally supported at its rear part by a swinging arm 15, and is configured to be able to swing back and forth. Thereby, as the rotary drive shaft 13 moves up and down, it swings back and forth together with the lifting arm 8 and the sub-link 9, and the planting tool 6 is configured to have a longitudinal bulge in its up-and-down locus L.

The swinging arm 15 has its upper end pivotally supported by the case of the planting transmission part E2, and its lower end can swing back and forth like a pendulum, and the rear part of the swinging plate 14 is rotatably attached. ing.

FIG. 5 is a side view of the vicinity of the planting device 4 at the bottom dead center.

The lifting/lowering opening/closing mechanism U configured as described above receives the driving force from the planting transmission part E2, and raises and lowers the planting tool 6 along the lifting trajectory L, and also feeds the seedlings from the seedling feeding device 5 at the top dead center. By opening the dropped planting tool 6 near the bottom dead center, seedlings are planted in the field.

A closing regulating bolt (closing regulating member) 11c is provided near the bottom of the cam contact roller 11b. After the opening/closing cam 12 is separated from the cam contact roller 11b, the closing regulating bolt 11c temporarily contacts the cam contact roller 11b (for example, for about 2 to 3 seconds) and restricts the rotation of the opening/closing interlocking arm 11. As a result, the closing operation of the planting tool 6 is temporarily restricted, and the height position at which the planting tool 6 closes is moved upward by a set distance from the bottom dead center. This closing regulating bolt 11c is configured to be able to move forward and backward to adjust its operating position, and the above-mentioned set distance can be adjusted. With this, it is possible to prevent the planting tool 6 from closing completely when the planting tool 6 is raised, and as a result, for long seedlings, the seedling planting tool 6 that is being raised closes and pinches the seedlings, allowing them to be planted. This prevents the problem of picking it later. Furthermore, by making it possible to adjust the operating position by moving the closing regulating bolt 11c back and forth, it becomes possible to adapt to the type and length of the seedling.

FIG. 6 is a side view of the main parts around the shock absorber K.

A buffer device K is provided between the lifting arm 8 and the sub-link 9 to provide a buffer near the top dead center of the lifting trajectory L of the planting tool 6. This shock absorber K includes a resilient contact part k1 provided at the lower part of the lifting arm 8 and a contacted part k2 provided at the upper part of the sub link 9.

The resilient contact portion k1 includes an elastic bolt k13 that has a bolt spring k11 and imparts an elastic action (elastic force) to the bolt head k12, and a lock nut (adjustment nut) k14 that allows adjustment of the fixing position of the bolt head k12. It is equipped with

The contacted portion k2 has a protrusion shape that protrudes upward, and is disposed at a position near the top dead center of the ascending and descending locus L of the planting tool 6 so as to come into contact with the resilient contact portion k1. As a result, the resilient contact portion k1 and the non-contact portion k2 come into resilient contact near the top dead center of the vertical trajectory L of the planting tool 6, and the impact when the planting tool 6 is temporarily stopped is buffered. Stable operation and improved strength are achieved.

In addition, by moving the bolt head k12 forward and backward using the lock nut k14 to adjust the fixing position (change the amount of tightening of the bolt spring k11), it is possible to adjust the shock absorption spring load (elastic force) and the action start position. ing. Thereby, it is possible to prevent the planting tool 6 from being pushed back by the reaction force due to the shock absorbing spring load being too strong and failing to receive the seedlings.

Note that the shock absorber K may be configured such that a contacted portion k2 is provided at the lower part of the lifting arm 8, and a resilient contact portion k1 is provided at the upper portion of the sub link 9.

<Cleaning device>
Soil from the field may adhere to the inside of the planting tool 6. If this soil accumulates inside the planting tool 6, part of the space inside the planting tool 6 will be occupied by the soil, and the soil will make the seedlings inside the space in an unsuitable position for planting, causing them to be planted in the field. The growth of seedlings may be affected.

In order to prevent this, a washing device W that supplies washing water to the planting tool 6 is disposed at an appropriate location on the traveling vehicle body 2, and is configured to wash away the soil while planting the seedlings when the planting tool 11 is lowered ( (not shown in FIG. 1). As a result, the soil in the planting tool 6 is washed away each time planting is performed, so that the posture of the seedlings is prevented from being disturbed due to accumulation of soil, and the accuracy of planting the seedlings is improved.

FIG. 7 is a plan view of the cleaning device W.

The cleaning device W has a transmission shaft w1 protruding from the planting section 3 to one left and right side (right side) of the machine body, and a crank plate w2 is attached to the transmission shaft w1 so as to be integrally rotatable. Specifically, a support plate w3 is attached to the end of the transmission shaft w1, and a crank plate w2 is attached to the support plate w3 from the outside of the machine body via a fixing member such as a bolt. Further, a slide guide plate w4 is fixed to the outside of the crank plate w2.

8 is a perspective view of the main part of the front part of the cleaning device W, and FIG. 9 is a sectional view of the main part of FIG. 8.

The crank plate w2 is formed with a slide notch w21, and the slide guide plate w4 is formed with a slide elongated hole w41, which is a long hole whose longitudinal direction is longitudinal, so as to overlap the slide notch w21. There is.

A fastening bolt w23 to which a double nut w22 is attached is arranged in the slide notch w21. The fixing bolt w23 functions to fix the crankshaft w5 by screwing in when not in use, but the double bolt w22 is configured to easily return the crankshaft w5 to the previous adjustment position.

The crankshaft w5 is inserted into the long slide hole w41 so as to be slidable back and forth, and can be fixed by fastening with a fixing bolt. The fixed position of the crankshaft w5 can be adjusted by sliding the crankshaft w5 along the slide slot w41. Further, one end of the pump rod w6 is attached to the crankshaft w5. Further, the other end of the pump rod w6 is connected to a pump case w7 through which wash water is taken in and taken out.

The peripheral edge w42 of the slide elongated hole w41 is provided with a plurality of position adjustment grooves w43 at predetermined intervals, the shape of which is shown in the balloon in FIG. Since the crankshaft w5 is caught in the groove w43, alignment of the fixed position is facilitated. The fixed position of the crankshaft w5 changes the amount of back-and-forth movement (stroke) of the pump rod w6, making it possible to set the amount of water fed by the water pump w10.

Returning to FIG. 7, a pump head w8 is provided on one side of the pump rod w6, and a bearing w9 that rotatably supports the pump rod w6 is provided inside the pump head w8. Moreover, pump support shafts w11, w11, which serve as fulcrums of the water pump w10, are provided on both left and right sides of the pump head w8 and the bearing w9.

Furthermore, a suction nipple w12 for connecting a water supply hose (not shown) connected to a water tank is provided on the upper side of the pump head w8 on one side (right side) of the machine body, and on the other side (left side) of the machine body and on the lower side. A delivery nipple w13 to which a water supply hose (not shown) for sending water to the planting tool 6 is connected is provided on the side.

The suction nipple w12 and the delivery nipple w13 are connected to a valve plate w14 provided inside the pump head w8.

Furthermore, a piston head w15 for taking in and taking out water is provided on the rear side of the pump rod w6. The piston head w15 is composed of front and rear piston plates w16, w16 having a diameter along the inner diameter of the pump case w7, and an O-ring w17 provided between the front and rear piston plates w16, w16 to prevent water leakage.

In the above configuration, when the transmission shaft w1 rotates in conjunction with the operation of the planting section 3, the crank plate w2 rotates. This causes the pump rod w6 to slide, causing the piston head w15 to slide in the front-rear direction within the pump case w7.

With such a configuration, the cleaning device W moves the planting tool 6 from the delivery nipple w13 when the pump rod w6 moves to the front side of the machine body by rotation of the crank plate w2 and the piston head w15 moves from the rear side to the front side of the machine body. It is configured to supply water to the side.

FIG. 10 is a perspective view of a main part inside the rear part of the cleaning device W, and FIG. 11 is a side sectional view of the main part of the rear part of the cleaning device W.

As shown in FIGS. 10 and 11, a washer w19 is disposed between the O-ring w17 and the ring retaining groove w18 in which the O-ring w17 is disposed. Thereby, the ring retaining groove portion w18 is configured to be prevented from being worn out.

FIG. 12 is a perspective view of the main part of the front part of the cleaning device W according to the modification.

As shown in FIG. 12, a U-shaped hook w20 may be provided at the front of the cleaning device W. As a result, it is necessary to idle the planting section 6 when filling the water supply hose with water in preparation for using the cleaning device W or when draining water after use, but the U-shaped hook w20 is By manual operation, the piston head w15 can be reliably moved back and forth, and can be operated quickly and reliably.

FIG. 13 is a perspective view of the main part of the front part of the cleaning device W according to another modification.

As shown in FIG. 13, a grip portion w21 may be provided instead of the U-shaped hook w20 in FIG. This makes it easy to grasp the grip part w21 and manually reciprocate the piston head w15 back and forth.

<Stand>
FIG. 14(a) is a front view of the stand ST of the transplanter 3, and FIG. 14(b) is a side view of the main parts. As shown in FIGS. 14(a) and 14(b), the stand ST, which is grounded in the field in order to restrict the movement of the transplanter 3 during suspension of planting work, has a pivot point on the stand base st1. At the same time, a slide pin st2 is provided at the upper part of the stand base st1 so as to be movable within the long hole. A thread groove is formed in this slide pin st2, and by tightening or loosening a fixing member such as a nut, the slide pin st2 can be moved in the elongated hole of the stand base st1 or not moved. The structure is such that the vertical length of the stand ST can be changed.

This prevents the stand ST from being able to touch the ground due to insufficient length, causing the transplanter 3 to move from the stop position when work is interrupted, and eliminating the need to move the transplanter 3 when work is resumed, thereby preventing a decrease in work efficiency. This also prevents workers from spending extra effort.

In addition, by shortening the length of the stand ST, it is possible to prevent it from interfering with surrounding components when storing the stand ST, and by suppressing the amount of protrusion of the stand ST, it is difficult for the worker's feet to come into contact with it. This improves work efficiency.

<Crawler>
FIG. 15 is a plan view of the vicinity of the mission case of the transplanter 1 of another embodiment.

As shown in FIG. 15, the transplanter 3 of another embodiment is configured with a crawler R as a traveling means in place of the front wheels 2c and the rear wheels 2b, and includes a crawler transmission case r1 and a transmission case 2d. A low-strength collar member r2 is disposed between them for transmission. Specifically, the collar member r2 has a substantially hexagonal shape in a plan view, has a constriction part r3 in the center, and is connected to a mission shaft r4, which is an output shaft of the mission case 2d, to transmit power to the crawler R. transmitted to. As a result, when an overload is applied to the crawler R due to stone encroachment, etc., stress is concentrated on the constriction part r3 of the collar member r2, and by intentionally creating a shape that causes damage, it is possible to prevent damage to other important parts. , maintenance efficiency can be improved.

FIG. 16 is a plan view of the main parts around the crawler.

As shown in FIG. 16, a resin collar r6 is fitted into the wheel shaft portion r5 of the crawler R. The resin collar r6 has a stepped shape and is chamfered, as shown in the balloon in FIG. It is constructed to increase the width and reduce the inclination of the wheels. This improves maintainability and prevents impurities such as weeds from becoming entangled in the bearings of the crawler R and causing damage.

<Auxiliary step>
FIG. 17 is an exploded perspective view of the auxiliary step SP of the transplanter 1 of another embodiment.

The transplanter 1 can also be constructed as a riding type on which a worker rides, and an auxiliary step SP for the worker to get on and off the machine can be arranged on the front side of the traveling vehicle body 2. The auxiliary step SP is configured such that a slide groove sp2 is formed in the left and right support side plate parts sp1, and a flat plate-like getting on/off step part sp3 can be slid in the direction toward the front in the paper along the slide groove sp2 to change its position. An elastic member (spring) sp4 is configured to urge the auxiliary step sp3 upward on the back side of the page. As a result, when getting on and off, the step part sp3 is pulled out to the front by stepping downward, and when not in use, by releasing the foot, the step part sp3 is retracted and compacted by the force of the elastic member sp4. Therefore, there is no need to raise the feet high when getting on the vehicle, which reduces the burden on the worker when moving, and reduces the amount of forward protrusion of the auxiliary step sp3 after getting on the vehicle or when not in use. Damage can be prevented.

<Hydraulic lowering stopper>
FIG. 18 is a perspective view of the main parts around the hydraulic drop prevention mechanism YS of the transplanter 1 of another embodiment.

As shown in FIG. 18, the transplanter 1 is provided with a hydraulic lock lever YS1 (for example, see Japanese Patent Application Laid-Open No. 2020-103199) as a hydraulic drop prevention mechanism YS to prevent vehicle height from decreasing due to oil leak, and the hydraulic The lock lever ys1 can be configured to be provided with a hydraulic lowering stopper ys2, and the cable ys3 can be directly assembled to the hydraulic lowering stopper ys2. With this configuration, by not inserting a relief spring between the hydraulic lock lever ys1 and the cable ys3, the hydraulic lock lever ys1 cannot be placed in the fixed position at times other than the maximum lift. Therefore, even if the hydraulic lock is applied in situations unintended by the operator, especially when the vehicle height is raised when adjusting the planting depth during planting work, automatic planting depth control will occur even if the ridge height changes thereafter. This prevents the planting accuracy of seedlings from decreasing.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the invention described in the claims, and these are also included within the scope of the present invention. Needless to say.

1 Transplanter 2 Traveling body 2a Control handle 2b Rear wheel 2c Front wheel 2d Mission case 2e Transmission case 2f Transmission shaft 3 Planting section 4 Planting device 5 Seedling supply device 5a Seedling receiving cup 6 Planting tool 6a Opening 6b Guide tube 6c Beak Member 6d Opening/closing member 6e Hopper holder 6f Outer receiving arm 6g Inner receiving arm 7 Opening/closing wire 7a Cable outer 7b Cable inner 8 Elevating arm 9 Sub-link 10 Interlocking crank arm 11 Opening/closing interlocking arm 11a Rotating fulcrum 11b Cam contact roller 11c Closing regulation bolt 12 Opening/closing cam 13 Rotation drive shaft 14 Swing plate 15 Swing arm E Engine
E2 Planting transmission part K Shocking device k1 Resilient contact part k2 Contacted part k11 Bolt spring k12 Bolt head k13 Elastic bolt k14 Lock nut R Crawler U Lifting opening/closing mechanism W Cleaning device w1 Transmission shaft w2 Crank plate w3 Support plate w4 Slide guide plate w5 Crankshaft w6 Pump rod w7 Pump case w8 Pump head w9 Bearing w10 Water pump w11 Pump shaft w12 Suction nipple w13 Delivery nipple w14 Valve plate w15 Piston head w16 Piston plate w17 O-ring w18 Ring retaining groove w19 Washer w20 Hook w21 For sliding Notch w22 Double nut w23 Fixing bolt w24 Grip part w41 Slide slot w42 Periphery w43 Position adjustment groove

Claims (3)

a planting tool (6) for planting the dropped seedlings;
A transplanting machine equipped with a lifting/lowering opening/closing mechanism (U) for lifting/lowering and opening/closing the planting tool (6),
The lifting/lowering opening/closing mechanism (U) includes a lifting arm (8) that lifts and lowers the planting tool (6);
a sub-link (9) located below the lifting arm (8) and maintaining the posture of the planting tool (6);
an interlocking crank arm (10) that connects and interlocks the lifting arm (8) and the sub link (9);
a swinging plate (14) to which the elevating arm (8) and the sub-link (9) are attached and configured to be able to swing back and forth;
an opening/closing interlocking arm (11) connected to one end of an opening/closing wire (7) that opens and closes the planting tool (6) by a pulling operation;
An opening/closing cam (12) that rotates the opening/closing arm (11) and pulls and operates the opening/closing wire (7) by contacting with a cam contact roller (11a) provided on the opening/closing arm (11). and,
A rotary drive shaft (13) that moves the lifting arm (8) up and down while rotating the opening/closing cam (12),
A transplanter characterized in that the rotational drive shaft (13) is connected to the lifting arm (8) at a midway portion of the lifting arm (8). A seedling supply device (5) for supplying seedlings to the planting tool (6) is provided above the planting tool (6),
The seedling supply device (5) has a structure in which a plurality of seedling receiving cups (5a) operate in a circular orbit as receptors for receiving seedlings inputted by the operator, and the seedling feeding device (5) moves from the seedling receiving cups (5a) to the planting tool. (6) It is configured to be dropped at a timing corresponding to the lifting and lowering,
The planting tool (6) includes a cylindrical guide tube (6b) provided at the top of the planting tool (6) to receive seedlings from the seedling supply device (5), and A beak-shaped beak member (6c) that is provided below the tube (6b) and plants seedlings by opening and closing operations, and an opening and closing member (6d) that opens and closes the beak member (6c),
The opening/closing member (6d) includes a hopper holder (6e) connected to the opening/closing wire (7) and opening/closing the attached beak member (6c) by pulling and loosening the opening/closing wire (7),
The hopper holder (6e) includes two receiving arms (6f, 6g) that receive the two cables (7a, 7b) that are the opening/closing wires (7),
The two receiving arms (6f, 6g) are arranged so that the height positions of their upper ends are different, and the upper part of the receiving arm (6g) with the higher upper end of the two receiving arms (6f, 6g) is 2. The transplanting machine according to claim 1, wherein the cable (7b) attached to the transplanter is arranged in a downwardly inclined position. A cleaning device (W) that supplies cleaning water to the planting tool (6) is provided,
The cleaning device (W) has a crank plate (w2) rotatably attached to a power transmission shaft (w1) that protrudes from one left and right side of the aircraft body, and the crank plate (w2) has a long hole with the front and rear sides being longitudinal. A long slide hole (w41) is formed, a crankshaft (w5) is inserted into the long slide hole (w41) so as to be slidable back and forth, and one end of the pump rod (w6) is inserted into the crankshaft (w5). The transplanter according to claim 1 or claim 2, wherein the other end of the pump rod (w6) is connected to a pump case (w7) through which washing water is taken in and taken out.