JP2020195400A - Transplanter - Google Patents

Abstract

To provide a transplanter capable of preventing a change of a car height due to time course.SOLUTION: A transplanter comprises: a car height adjustment mechanism for adjusting a car height; a planting unit for planting a planting object; and a car height maintaining unit for regulating a change of a car height adjusted by the car height adjustment mechanism due to time course. Regulation of a change of the car height is configured such that the car height maintaining unit regulates motion of the car height adjustment mechanism, the car height adjustment mechanism comprises: a cylinder part 110 in which a piston 111 extending/contracting in a cross direction is provided on a cylinder base part; and a car height adjustment arm 120 coupled to a tip part of the piston 111. The car height maintaining unit comprises: a second contraction regulation member which regulates motion in a direction where the car height becomes lower in a state in which the car height is adjusted to become a prescribed height or greater height for regulating contraction of the piston 111; and a second support member 2200 for rotatably supporting the second contraction regulation member.SELECTED DRAWING: Figure 10

Description

The present invention relates to a transplanter such as a vegetable transplanter.

For example, the transplanter shown in Prior Patent Documents 1 and 2 is provided with a traveling device capable of adjusting the vehicle height by expanding and contracting the elevating cylinder and rotating the traveling transmission case up and down.

If the seedling planting device is left on the ground for a long time, the seedlings may not be planted at the set planting depth due to soil adhesion, or the lower end of the seedling planting device may be deformed. Therefore, it is common to raise the vehicle height to the maximum during breaks during work or when storing in a warehouse.

Japanese Unexamined Patent Publication No. 2016-136976 JP-A-2017-175998

However, the elevating cylinder and the hydraulic circuit that expands and contracts the elevating cylinder continue to be subjected to a force that tries to lower the vehicle height due to the weight of the aircraft, and with the passage of time, hydraulic oil gradually flows out and the elevating cylinder It may shrink. As a result, the height of the vehicle is lowered, the seedling planting device comes into contact with the field scene or the floor of the warehouse, and there is a problem that soil adheres and the seedling planting device is deformed.

In view of such problems of the conventional transplanter, it is an object of the present invention to provide a transplanter capable of preventing a change in vehicle height over time.

The invention of claim 1 is a rotatable transmission case (38) for transmitting a driving force to a traveling device (44) and a vehicle height adjusting mechanism (38) for adjusting the vehicle height by rotating the transmission case (38). 100), a planting device (42) provided on the traveling vehicle body (40) for planting an object to be transplanted, and a vehicle that regulates a change in vehicle height over time adjusted by the vehicle height adjustment mechanism (100). In a transplant machine provided with a height maintenance device, the vehicle height change is regulated by the vehicle height maintenance device restricting the movement of the vehicle height adjustment mechanism (100). ..

According to the second aspect of the present invention, in the vehicle height adjusting mechanism (100), a piston (111) that can be expanded and contracted in the front-rear direction is provided on a cylinder base (112), and the piston (111) The vehicle height adjusting arm (120) is provided with a vehicle height adjusting arm (120) connected to the tip portion and connected to the transmission case (38) side, and the vehicle height of the vehicle height maintaining device is determined by the vehicle height adjusting mechanism (100). A second contraction regulating member (11) that regulates the contraction of the piston (111) by restricting the movement of the vehicle height adjusting arm (120) in the direction in which the vehicle height becomes lower in a state of being adjusted to the height or higher. The transplant machine according to claim 1, wherein the transplanter is composed of a 2100) and a second support member (2200) that rotatably supports the second shrinkage control member (2100).

In the invention of claim 3, the second support member (2200) is arranged on the rear side of the vehicle height adjusting arm (120), and the second contraction regulating member (2100) is the vehicle height adjusting arm (120). ) Is provided with hook portions (2111) that can be hooked on the left and right front edge portions (122), and the vehicle height is adjusted to the predetermined height or higher by the vehicle height adjusting mechanism (100). After the contraction regulating member (2100) rotates and the hook portion (2111) is located on the front side of the left and right front edge portions (122) of the vehicle height adjusting arm (120), the vehicle height adjusting arm (2111) with time elapses. When the 120) moves forward, the hook portion (2111) of the second contraction regulating member (2100) is caught by the left and right front edge portions (122) of the vehicle height adjusting arm (120). The transplantation machine according to claim 2, wherein the contraction of the piston (111) is regulated by the above method.

According to the invention of claim 4, in the second shrinkage control member (2100), the hook portion (2111) is fixed to both left and right ends, and the second support member (2200) is inserted inside as a rotation axis. The second shrinkage regulating member (2100) is provided on the outer peripheral side surface of the tubular portion (2120) which is offset from the central portion in the left-right width direction to the left or right side of the tubular portion (2120). A rotating stay (2130) for rotating operation is attached, and the second contraction regulating member (2100) is rotated at one end of the rotating stay (2130) when it is in a pulled state. A second regulating actuating wire (2300) is provided at a regulated position for regulation, and the second shrinkage regulating member (2100) is unregulated at the other end of the rotating stay (2130). A second urging member (2400) for urging in the direction is provided, and the rotating stay (2130) has one end and the other end centered on a mounting hole for mounting on the tubular portion (2120). The transplanting machine according to claim 3, wherein the transplanting machine has a symmetrical shape.

In the first related invention related to the first aspect, the vehicle height adjusting mechanism (100) has a cylinder portion (110) in which a telescopic piston (111) is provided at a cylinder base (112) and the piston. The vehicle height adjusting arm (120) is connected to the tip end portion of (111) and is connected to the transmission case (38) side, and the vehicle height maintaining device includes the cylinder base portion (112) and the vehicle height adjustment. A contraction regulating member (1100) that regulates the contraction of the piston (111) by entering the space (150) between the arms (120), and a support member that rotatably supports the contraction regulating member (1100). It is a transplanting machine characterized by being configured by (1200).

In the second related invention related to the first related invention, the contraction regulating member (1100) is placed between the contraction regulating member (1100) and the supporting member (1200) to the vehicle height adjusting arm (120). The contraction regulating member (1100) is provided with an urging member (1260) to be urged to the side, and when the width of the space portion changes in the direction of shrinking with the passage of time after the contraction regulating member (1100) has entered the space portion, the contraction regulating member (1100) is provided. ) Moves in the direction of compressing the urging member (1260) along the axial direction of the piston (111), and one end side of the contraction regulating member (1100) comes into contact with the support member (1200) side. The transplanter is characterized in that the contraction of the piston (111) is regulated by the above.

In the third related invention related to the first or second related invention, when the pulling state is reached, the contraction regulating member (1100) is rotated to enter the space portion so as to be positioned at the regulated position. When the pulling state of the regulation actuating wire (1300) and the regulation actuating wire (1300) is released, the contraction regulation member (1100) is rotated to be separated from the space portion to be positioned in the non-regulation position. The transplant machine according to claim 2 or 3, further comprising a release spring (1400).

In the fourth related invention related to the first or second related invention, the contraction regulating member (1100) of the vehicle height maintaining device has the vehicle height set to a predetermined height or more by the vehicle height adjusting mechanism (100). The transplant machine is characterized in that it can penetrate into the space (150) between the cylinder base (112) and the vehicle height adjusting arm (120) in the adjusted state.

According to the invention of claim 1, it is possible to prevent a change in vehicle height over time.

In addition, since the vehicle height maintenance device regulates the operation of the vehicle height adjustment mechanism (100), the vehicle height changes due to the operation of the vehicle height adjustment mechanism (100) due to the influence of the weight of the aircraft when not working for a long time. Therefore, the depth of soil adhering to the planting device (42) and entering the soil changes, and the planting depth is prevented from being disturbed.

Further, since it is possible to prevent the vehicle height from dropping during the storage period when the vehicle is left for a long period of time, it is possible to prevent the planting device or the like from continuously contacting the ground and being deformed.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the vehicle height maintaining device regulates the movement of the vehicle height adjusting arm (120) in the direction of lowering the vehicle height, thereby causing the piston. By having the second contraction regulating member (2100) that regulates the contraction of (111), it is possible to prevent the piston (111) from contracting due to the influence of the weight of the machine body and the like and changing the vehicle height.

Further, the second contraction regulating member (2100) cannot be positioned at the regulated position unless the piston (111) of the cylinder portion (110) is extended to a predetermined height or higher to raise the vehicle height to a predetermined height or higher. It is prevented from being in a state where it cannot be changed, the planting depth is stabilized, and damage to the aircraft is prevented.

According to the invention of claim 3, in addition to the effect of the invention of claim 2, the hook portion (2111) is arranged so as to be hooked on the left and right front end edges of the vehicle height adjusting arm (120). Since the load can be distributed by hooking on the left and right front edge portions, for example, the second contraction regulating member (2100) may come off when the cylinder portion (110) is accidentally contracted (for a short time). And it is prevented from being damaged.

According to the invention of claim 4, in addition to the effect of the invention of claim 3, the second contraction regulating member (2100) moves to the non-regulated position when the second regulating actuating wire (2300) is not pulled. As a result, it is possible to prevent the second contraction regulating member (2100) from moving to the regulated position and being unable to adjust the vehicle height.

In addition, since the rotating stay (2130) has a symmetrical shape, it does not affect the operation even if the second urging member (2400) and the second regulation operating wire (2300) are attached by reversing the shape. Malfunctions are prevented.

According to the first related invention related to claim 1, the contraction regulating member (1100) is inserted between the sliding side and the fixed side to regulate the contraction of the piston (111), thereby controlling the weight of the machine body and the like. It is prevented that the piston (111) contracts due to the influence and the vehicle height changes.

According to the second related invention, in addition to the effect of the first related invention, the contraction regulating member (1100) can enter with a gap in the space portion, so that the contraction regulating member (1100) is a cylinder portion (1100). It is possible to prevent damage to 110).

Further, when the contraction regulating member (1100) is always urged toward the vehicle height adjusting arm (120) by the urging member (1260), the contraction regulating member is released when the regulation by the contraction regulating member is released. Since it is possible to prevent interference with the support member (1200) when moving away from the regulated position, smooth rotation can be realized.

According to the third related invention, in addition to the effect of the first or second related invention, the contraction regulating member (1100) moves to the unregulated position when the regulating actuating wire (1300) is not pulled. , It is possible to prevent the contraction regulating member (1100) from moving to the regulated position and being unable to adjust the vehicle height.

Further, the contraction regulating member (1100) rotates in a state where it cannot enter between the tip portion on the sliding side and the end portion on the fixed side, so that the cylinder portion (110) is prevented from being damaged.

According to the fourth related invention, in addition to the effect of the first or second related invention, the contraction regulating member must be extended to the piston (111) of the cylinder portion (110) to a predetermined or higher vehicle height. Since (1100) cannot be moved to the regulated position, it is possible to prevent the vehicle height from being unable to be changed due to an erroneous operation, stabilize the planting depth, and prevent damage to the machine body.

Left side view of the vegetable transplanter according to the embodiment of the present invention Top view of the vegetable transplanter of this embodiment Schematic plan view schematically showing the vehicle height adjustment mechanism of the vegetable transplanter of the present embodiment Schematic perspective view showing a main part of the first vehicle height maintenance device of this embodiment. Schematic plan view of a main part showing a state at a regulated position of the first vehicle height maintenance device when the hydraulic lock lever of the present embodiment is operated and positioned on the "fixed" side. Schematic left side view of the main part showing the state of the first vehicle height maintenance device at the regulated position when the hydraulic lock lever of the present embodiment is operated and positioned on the "fixed" side. Schematic rear view of the main part showing the state of the first vehicle height maintaining device at the regulated position when the hydraulic lock lever of the present embodiment is operated and positioned on the "fixed" side. Schematic rear view of the main part showing the state of the first vehicle height maintenance device at the unregulated position when the hydraulic lock lever of the present embodiment is operated and positioned on the "release" side. (A): Schematic left side view showing a main part of the second vehicle height maintaining device according to the second embodiment, (b): Schematic plan view of the second vehicle height maintaining device shown in FIG. 9A. Schematic plan view of a main part showing a state at a regulated position of the second vehicle height maintenance device when the hydraulic lock lever of the present embodiment is operated and positioned on the "fixed" side. Schematic left side view of the main part showing the state of the second vehicle height maintenance device at the regulated position when the hydraulic lock lever of the present embodiment is operated and positioned on the "fixed" side. Schematic left side view of the main part showing the state of the second vehicle height maintenance device at the unregulated position when the hydraulic lock lever of the present embodiment is operated and positioned on the "release" side. (A): Side view of the main part of the soil-covering pressure ring equipped with a scraper, (b): Rear view of the main part of the soil-covering pressure ring equipped with a scraper, (c): Soil-covering pressure indicating that the scraper is arranged in a V shape. Rear view of the main part of the wheel (A): Top view of the main part of the soil-covering suppression ring provided with the scraper of another configuration example, (b): Side view of the main part of the soil-covering suppression ring provided with the scraper of another configuration example. (A): Top view of the main part of the soil-covering suppression ring provided with the scraper of another configuration example, (b): Side view of the main part of the soil-covering suppression ring provided with the scraper of another configuration example.

Hereinafter, embodiments of the transplanter of the present invention will be described with reference to the drawings.

(Embodiment 1)
First, with reference to FIGS. 1 and 2, the overall configuration of the seedling transplanter 1 for transplanting vegetable seedlings will be mainly described as an example of the transplanter according to the first embodiment of the present invention.

FIG. 1 is a side view showing a seedling transplanter 1 for transplanting, for example, onion seedlings as an example of the transplanter of the first embodiment of the present invention, and FIG. 2 is a side view of the seedling transplanter 1 of the first embodiment. It is a plan view.

In the following description, the side where the steering wheel 47 is arranged is the rear side, and the opposite side, that is, the side where the engine 41 is arranged is the front side. Then, the right-hand side is the right and the left-hand side is the left when facing the front side of the aircraft.

The seedling transplanter 1 of the first embodiment has a traveling vehicle body 40 capable of moving forward, a steering handle 47 for walking control provided at the rear of the traveling vehicle body 40, and a planting device for planting seedlings in a field. 42 and a seedling supply device 43 for supplying seedlings to the planting device 42 are provided.

Further, a worker seat 46 on which the worker sits is provided so that the worker can get on and supply seedlings to the seedling supply device 43.

The planting device 42 includes a first planting tool 20a and a second planting tool 20b, and is powered by the planting transmission case 26 to the first planting tool 20a via the vertical movement mechanism 21. The second planting tool 20b is configured to repeatedly move up and down.

Further, the seedling supply device 43 includes a plurality of cup-shaped seedling accommodating bodies 22 that receive the seedlings supplied by the worker from above and accommodate the seedlings inside, and is arranged in a substantially elliptical shape in a plan view. These plurality of seedling accommodating bodies 22 are configured to be able to move around.

As a result, the bottom of the seedling container 22 is opened at the upper position of each planting tool, the seedlings inside fall into the planting tool, and each planting tool sequentially puts the fallen seedlings into the field. It is a composition to plant.

Further, the steering handle 47 is attached to the rear end portion of the airframe frame 19 whose front end portion is fixed to the mission case 39.

Further, a pair of left and right soil covering pressure rings 37 are provided at positions near the rear left and right sides of each of the planting tools 20a and 20b.

The traveling vehicle body 40 includes an engine 41, a pair of left and right drive wheels 44 that are driven and rotated by transmitting the power of the engine 41, and a pair of left and right front wheels 45 that are rotatably supported in front of the rear wheels 44. And have.

A mission case 39 is arranged behind the engine 41. The mission case 39 has a case portion extending from the left side portion thereof to the left side portion of the engine 41, and this case portion is connected to the left side portion of the engine 41. The output shaft of the engine 41 enters this case portion, and power is transmitted to the transmission mechanism in the transmission case 39.

The front portion of the traveling transmission case 38, which is long in the front-rear direction, is rotatably attached to both the left and right sides of the mission case 39. Specifically, a substantially cylindrical traveling extension case 11 that rotates integrally with the traveling transmission case 38 is provided on the inner side of the machine body at the front portion of the traveling transmission case 38, and the traveling extension case 11 is provided. The transmission case 38 is rotatably attached to the left and right sides of the mission case 39, and the traveling transmission case 38 is rotatably attached to the left and right sides of the mission case 39. Then, the rear wheel 44 is mounted on the rear wheel axle 12 projecting toward the rear side of the traveling transmission case 38.

The tip of the wheel drive shaft 10 extending outward from the transmission case 39 to the left and right sides enters the position of the rotation shaft core at the front of the traveling transmission case 38, and the traveling unit system transmission transmission in the transmission case 39 The power for traveling through the section is transmitted to the transmission mechanism in the transmission case 38 for traveling. Then, the power for traveling is transmitted to the rear end axle 12 of the traveling transmission case 38 via the transmission mechanism in the traveling transmission case 38, and the rear wheels 44 are driven and rotated.

The left and right side clutches (not shown) provided in the mission case 39 can disconnect the left and right rear wheels 44. Therefore, when turning the airframe, the side clutch is used to bring the left and right rear wheels 44, which are inside the turn, into a non-driving state so that the machine can turn smoothly.

Further, the seedling transplanter 1 of the present embodiment is provided with a vehicle height adjusting mechanism 100 that raises and lowers the rear wheel 44 with the front side of the traveling transmission case 38 as a rotation fulcrum (see FIG. 3). FIG. 3 is a schematic plan view schematically showing the vehicle height adjusting mechanism 100.

Specifically, the vehicle height adjusting mechanism 100 of the present embodiment is configured as follows. That is, an elevating arm 13 extending upward is integrally attached to the outer peripheral portion of the traveling extension case 11 which is a connecting portion of the traveling transmission case 38 to the mission case 39. Further, the pair of left and right elevating arms 13 are connected to the left and right side portions of the connecting body 120 via a connecting rod or the like. Further, the tip of the elevating cylinder rod 111 of the elevating hydraulic cylinder 110 is attached to the central portion of the connecting body 120 in the left-right width direction, and the front end portion 112a side of the elevating cylinder base 112 of the elevating hydraulic cylinder 110 is attached. , Fixed to the mission case 39.

In the present embodiment, as shown in FIG. 3, the right elevating arm 13 is connected to the right end portion 120R of the connecting body 120 via the connecting rod 130, and the left elevating arm 13 is , It is connected to the left end portion 120L of the connecting body 120 via a left-right horizontal control hydraulic cylinder 140 that can be expanded and contracted in response to the inclination of the machine body.

The tip of the left / right horizontal control cylinder rod 141 of the left / right horizontal control hydraulic cylinder 140 is attached to the left end 120L of the connecting body 120, and the left / right horizontal control cylinder base 142 of the left / right horizontal control hydraulic cylinder 140. The front end side of the is connected to the left elevating arm 13.

By operating the elevating operation lever 16 (see FIG. 1), when the elevating hydraulic cylinder 110 is operated and the elevating cylinder rod 111 projects to the rear of the machine body, the left and right elevating arms 13 rotate rearward. Along with this, the left and right traveling transmission cases 38 rotate downward with the wheel drive shaft 10 as the rotation shaft core, and the machine body rises. On the contrary, when the elevating cylinder rod 111 of the elevating hydraulic cylinder 110 moves forward of the machine body and retracts into the cylinder base 112, the left and right elevating arms 13 rotate forward, and accordingly, the left and right traveling transmission cases. 38 rotates upward with the wheel drive shaft 10 as a rotation shaft core, and the airframe descends.

This allows the operator to adjust the vehicle height to a desired height.

Further, in the present embodiment, the hydraulic lock lever 17 (see FIG. 1) is in a state where the operator operates the elevating operation lever 16 (see FIG. 1) to adjust the vehicle height to the maximum raised position. The first vehicle height maintaining device 1000 prevents the vehicle height adjusted to the above-mentioned maximum raised position from changing in the direction of decreasing with the passage of time by operating and positioning the vehicle on the "fixed" side. It is provided. The first vehicle height maintenance device 1000 will be described later with reference to the drawings.

Further, the lifting hydraulic cylinder 110 operates based on the operation of the lifting operation lever 16 by the operator, and the sensor plate 14 that touches the ridge surface and operates according to the fluctuation of the vertical distance between the machine body and the ridge surface. (See FIG. 1) also works. The operation of the sensor plate 14 is an operation of detecting the height of the upper surface of the ridge based on the position of the machine body, and the machine body is set to the set height according to the height of the upper surface of the ridge based on the detection operation of the sensor plate 14. The structure is such that the lifting hydraulic cylinder 110 operates.

When the left-right horizontal control hydraulic cylinder 140 expands and contracts, the left-side elevating arm 13 connected to the left-right horizontal control hydraulic cylinder 140 rotates, and only the left rear wheel 44 moves up and down to move the aircraft. Tilt left and right. The left-right horizontal control hydraulic cylinder 140 is configured to operate based on the detection result of a sensor that detects the left-right inclination of the aircraft with respect to the left-right horizontal to make the aircraft left-right horizontal on an inclined ground.

Next, the first vehicle height maintaining device 1000 of the present embodiment will be further described mainly with reference to FIGS. 4 to 8.

FIG. 4 is a schematic perspective view showing a main part of the first vehicle height maintaining device 1000.

FIG. 5 is a schematic plan view of a main part showing a state of the first vehicle height maintaining device 1000 at a regulated position when the hydraulic lock lever 17 (see FIG. 1) is operated and positioned on the “fixed” side.

FIG. 6 is a schematic left side view of a main part showing a state of the first vehicle height maintaining device 1000 at a regulated position when the hydraulic lock lever 17 (see FIG. 1) is operated and positioned on the “fixed” side.

FIG. 7 is a schematic rear view of a main part showing a state of the first vehicle height maintaining device 1000 at a regulated position when the hydraulic lock lever 17 (see FIG. 1) is operated and positioned on the “fixed” side.

FIG. 8 is a schematic rear view of a main part showing a state of the first vehicle height maintaining device 1000 in an unregulated position when the hydraulic lock lever 17 (see FIG. 1) is operated and positioned on the “release” side.

That is, the first vehicle height maintenance device 1000 is mainly as shown in FIG.
(1) By operating the hydraulic lock lever 17 in a state where the vehicle height is adjusted to the maximum raised position by operating the elevating operation lever 16, the base body 112b and the rear end 112c of the elevating cylinder base 112 can be operated. Space created between the stepped portion 112d (see FIG. 3) and the spring holder 113 (see FIGS. 3 and 5) for holding the spring 121 arranged between the tip end side of the elevating cylinder rod 111 and the connecting body 120. A contraction regulating member 1100 (see FIG. 4) that enters the portion 150 (see FIG. 3) and regulates the contraction of the elevating cylinder rod 111.
(2) From the "regulated position" that is fixed to the upper surface of the base body 112b of the elevating cylinder base 112 and allows the contraction regulating member 1100 to enter the space 150 by rotatably supporting the contraction regulating member 1100 and the space 150. It is provided with a support member 1200 (see FIG. 4) that can be switched to a "non-regulated position" to be separated.

Further, as shown in FIG. 4 and the like, the shrinkage regulating member 1100 is
(1) The regulation plate member 1110 formed in a substantially U shape configured to be insertable into the space 150 generated when the vehicle height is adjusted to the maximum raised position by the operation of the elevating operation lever 16. When,
(2) One end portion 1120a is welded and fixed to the front left side surface of the regulation plate member 1110, and the other end portion 1120b is fixed to the rotation shaft portion 1210 of the support member 1200 to rotate the regulation plate member 1110 in the vertical direction. It is provided with a rotation support arm 1120 for supporting the above.

Further, the rear end edge portion 1110b of the regulation plate member 1110 is a substantially arcuate member, and when the shrinkage regulation member 1100 is located at the "regulation position", the front end edge portion 113a of the spring holder 113 (FIG. 3). , FIG. 5) is welded and fixed to the spring holder contact member 1111 which is configured to be able to contact.

Furthermore, it is a plate-shaped member that is welded and fixed to the inner wall surface near the front end edge portion 1110a of the regulation plate member 1110 and protrudes downward, and the contraction regulation member 1100 is rotated toward the "regulation position". At that time, the lower end edge portion 1112a of the plate-shaped member comes into contact with the upper surface of the outer peripheral portion of the rear end portion 112c of the elevating cylinder base 112, so that the regulation plate member 1110 is rotated to prevent excessive entry into the space portion 150. A stopper member 1112 is provided.

The lower end edge portion 1112a of the rotation stopper member 1112 is formed in a substantially arc shape recessed upward so as to follow the curved surface shape of the upper surface of the outer peripheral portion of the rear end portion 112c of the elevating cylinder base 112.

In this way, the rotation stopper member 1112 provided on the inner wall surface in the vicinity of the front end edge portion 1110a of the regulation plate member 1110 prevents the regulation plate member 1110 from entering the space portion 150 too much, so that the regulation plate member 1110 Can be prevented from being strongly pressed against the elevating cylinder rod 111 or the like and damaging or damaging the elevating cylinder rod 111.

Further, as shown in FIG. 4 and the like, the support member 1200 has a support member 1200.
(1) The rear end portion 1210b is welded and fixed to the other end portion 1120b of the rotation support arm 1120 of the contraction regulating member 1100, and the front end portion 1210a side is inserted through and inserted into the cylindrical boss portion 1220 to be rotatably held. Rotating shaft part 1210 and
(2) The boss portion 1220 is pierced and fixed to one end side (left side in a plan view), and a substantially Z-shaped support member fixing stay 1230 is welded and fixed to the other end side (right side in a plan view). In the neighborhood where the boss portion 1220 is welded and fixed, the outer receiving portion 1240 that fixes the front end portion of the outer cable of the relay cable 1300 described later is welded and fixed, and the front end edge portion 1110a of the regulation plate member 1110 is fixed to the back portion 1251 side. It is provided with a receiving plate member 1250 which can be contacted with.

Further, the support member fixing stay 1230 is fixed to the upper surface portion of the base main body 112b of the elevating cylinder base 112 by the fastening member via a pair of left and right through holes formed in the lower plate 1231 on the lower side thereof. Further, the floor step 15 is fixed to the upper plate 1232 on the upper side of the support member fixing stay 1230 by the fastening member via a pair of left and right through holes formed therein.

Further, a rotating shaft portion compression spring 1260 is mounted on a portion exposed from the boss portion 1220 on the rear end portion 1210b side of the rotating shaft portion 1210, and the regulation plate member 1110 is constantly urged toward the spring holder 113 side. As described above, it has a function of pressing the rotation support arm 1120 to the rear side.

In this way, by configuring the regulation plate member 1110 to constantly urge the spring holder 113 side, the front end edge portion 1110a of the regulation plate member 1110 is a receiving plate unless the elevating cylinder rod 111 contracts with the passage of time. It is separated from the back surface portion 1251 of the member 1250.

Therefore, when the operator sets the hydraulic lock lever 17 to the "fixed" position after operating the elevating operation lever 16 to adjust the vehicle height to the maximum raised position, the regulation plate member 1110 is set to the "regulation position". The width in the front-rear direction is smaller than the width in the front-rear direction of the space portion 150 (see FIG. 3), so that the front end edge portion 1110a of the regulation plate member 1110 receives. It does not interfere with the back surface portion 1251 of the plate member 1250, and the spring holder contact member 1111 fixed to the rear end edge portion 1110b of the regulation plate member 1110 does not interfere with the spring holder 113.

As a result, when the operator switches the hydraulic lock lever 17 from the "release" position to the "fixed" position and the regulation plate member 1110 moves from the non-regulation position to the regulation position, the receiving plate member 1250 and the spring holder Interference with 113 can be prevented and smooth rotation can be realized. Further, since the regulation plate member 1110 can enter the regulation position with a gap in the front-rear direction of the space portion 150, it is possible to prevent the regulation plate member 1110 from interfering with the lifting hydraulic cylinder 110 or the like and being damaged.

Further, when the operator switches the hydraulic lock lever 17 from the "release" position to the "fixed" position, the elevating cylinder rod 111 does not shrink with the passage of time at the initial time, so that the regulation plate member There is a gap between the front end edge portion 1110a of 1110 and the back surface portion 1251 of the receiving plate member 1250, and the spring holder contact member 1111 and the spring holder 113 fixed to the rear end edge portion 1110b of the regulation plate member 1110. There is also a gap between them. After that, the elevating cylinder rod 111 contracts with the passage of time, so that the gap between the spring holder contact member 1111 fixed to the rear end edge portion 1110b of the regulation plate member 1110 and the spring holder 113 is first formed. After that, the regulation plate member 1110 slides forward in parallel with the axis of the rotation shaft portion 1210 and compresses the rotation shaft portion compression spring 1260 in the forward direction, while the front end edge portion 1110a of the regulation plate member 1110 The gap between the receiving plate member 1250 and the back surface portion 1251 of the receiving plate member 1250 is absorbed.

Further, when the operator switches the hydraulic lock lever 17 from the "fixed" position to the "release" position, the hydraulic lock is locked after adjusting the lifting operation lever 16 to the position where the vehicle height is raised to the maximum in advance. Since the lever 17 is switched to the "release" position, the contraction of the elevating cylinder rod 111 over time is eliminated, and when the regulation plate member 1110 leaves the regulation position, interference with the receiving plate member 1250 and the spring holder 113 occurs. It can be prevented and smooth rotation can be realized.

Further, in the present embodiment, unless the vehicle height is basically set to the maximum height, the regulation plate member 1110 comes into contact with other members (for example, the spring 121) other than the elevating cylinder rod 111. Therefore, since the regulation plate member 1110 cannot be moved to the regulation position (space 150), for example, the vehicle height cannot be changed due to an erroneous operation of the hydraulic lock lever 17 of the operator during the transplanting work. Is prevented, the planting depth is stabilized, and damage to the aircraft is prevented.

Further, the relay cable 1300 for transmitting the movement of the hydraulic lock lever 17 to the rotation support arm 1120 extends diagonally upward from the lower left side of the center position in the left-right width direction of the machine body in rear view, and rotates. It is fixed to the lower end of the outer receiving portion 1240 so as to be connected to the dynamic support arm 1120.

That is, the front end portion 1310a of the outer cable 1310 of the relay cable 1300 is fixed to the lower end portion of the outer receiving portion 1240, and the front end portion 1320a of the inner cable 1320 of the relay cable 1300 is connected to the rotation support arm 1120. There is. Further, the rear end portion (not shown) of the inner cable 1320 of the relay cable 1300 is connected to the hydraulic lock lever 17 side.

As a result, when the operator operates the hydraulic lock lever 17 to set the "fixed" position and the inner cable 1320 is pulled and put into a pulling state, the rotation support arm 1120 is rotated clockwise in the rear view. (See arrow A in FIGS. 4 and 7), the regulation plate member 1110 moves to the regulation position. In this case, the rotation stopper member 1112 fixed to the inner wall surface of the regulation plate member 1110 comes into contact with the upper surface of the outer peripheral portion of the rear end portion 112c of the elevating cylinder base 112, so that the regulation plate member 1110 enters the space 150 too much. To prevent that.

Further, the relay cable 1300 extends diagonally upward from the lower left side of the center position in the left-right width direction of the machine body when viewed from the rear, and is connected to the rotation support arm 1120, so that the lower left side of the machine body is connected. Since it can be pulled back and forth in an area with space, other components such as the sensor plate 14 rotatably arranged in the lower right side and the hydraulic hose of the hydraulic cylinder 140 for horizontal horizontal control It is prevented that the relay cable 1300 interferes with the above.

Further, when the operator operates the hydraulic lock lever 17 to change the setting from the "fixed" position to the "release" position, the rotation support arm 1120 is released when the pulling state of the inner cable 1320 is released. For deregulation set to rotate the regulation plate member 1110 away from the regulation position and move it to the non-regulation position by rotating it in the counterclockwise direction (see arrow B in FIGS. 4 and 8) when viewed from the rear. A compression spring 1400 is mounted between the lower end of the outer receiving portion 1240 and the front end 1320a of the inner cable 1320 (see FIGS. 4, 7, and 8).

As a result, when the inner cable 1320 is not in the pulled state, the regulation plate member 1110 moves to the non-regulation position by the restoring force (extension force) of the compression spring 1400 for deregulation, so that the regulation plate member 1110 is arbitrarily regulated. It is possible to prevent the vehicle height from being unable to be adjusted by moving to the position.

From the above, according to the present embodiment, the first vehicle height maintaining device 1000 regulates the movement of the lifting hydraulic cylinder 110 of the vehicle height adjusting mechanism 100, so that, for example, the machine body does not work for a long time. Because it is possible to prevent the lifting hydraulic cylinder 110 of the vehicle height adjustment mechanism from operating and changing in the direction in which the vehicle height decreases due to the influence of its own weight (due to an oil leak of the lifting hydraulic cylinder, etc.), the planting tool (Fig. (Refer to reference numerals 20a and 20b of 1), the soil adheres to the tip and the depth of entry into the soil changes, the planting depth is disturbed, and the tip of the planting tool keeps in contact with the floor of the warehouse. It is prevented from being deformed.

The connecting body 120 of the present embodiment corresponds to an example of the vehicle height adjusting arm of the present invention. Further, the contraction regulating member 1100 of the present embodiment corresponds to an example of the contraction regulating member of the present invention, and the support member 1200 of the present embodiment corresponds to an example of the support member of the present invention. Further, the rotating shaft portion compression spring 1260 of the present embodiment corresponds to an example of the urging member of the present invention. Further, the relay cable 1300 of the present embodiment corresponds to an example of the regulation operating wire of the present invention, and the deregulation compression spring 1400 of the present embodiment corresponds to an example of the deregulation spring of the present invention.

(Embodiment 2)
Here, the same seedling transplanter 1 as described above will be described as an example of the transplanter according to the second embodiment of the present invention with reference to FIGS. 9 to 12, but in the case of the second embodiment, the above first embodiment is described. Since the second vehicle height maintaining device 2000 having a configuration different from that of the vehicle height maintaining device 1000 is provided, the differences will be mainly described.

In the second embodiment, the same reference numerals are given to the same configurations as those in the first embodiment, and the description thereof is omitted.

9 (a) is a schematic left side view showing a main part of the second vehicle height maintenance device 2000, and FIG. 9 (b) is a schematic plan view of the second vehicle height maintenance device 2000 shown in FIG. 9 (a). It is a figure.

FIG. 10 is a schematic plan view of a main part showing a state of the second vehicle height maintaining device 2000 at a regulated position when the hydraulic lock lever 17 (see FIG. 1) is operated and positioned on the “fixed” side.

FIG. 11 is a schematic left side view of a main part showing a state of the second vehicle height maintaining device 2000 at a regulated position when the hydraulic lock lever 17 (see FIG. 1) is operated and positioned on the “fixed” side.

FIG. 12 is a schematic left side view of a main part showing a state of the second vehicle height maintaining device 2000 at an unregulated position when the hydraulic lock lever 17 (see FIG. 1) is operated and positioned on the “release” side. ..

The second vehicle height maintenance device 2000 is mainly as shown in FIGS. 9 (a) and 9 (b).
(1) In a state where the vehicle height is adjusted to the maximum raised position by the operation of the elevating operation lever 16, by operating the hydraulic lock lever 17, the vehicle height is moved by the connecting body 120 in the direction of lowering (1). The second contraction regulating member 2100 (see FIGS. 9A and 9B) that regulates the contraction of the elevating cylinder rod 111 by regulating the arrow C in FIG.
(2) Both ends 2200a (see FIG. 10) are fixed to the U-shaped pipe 30 constituting the main frame, and the shaft member is arranged behind the connecting body 120 in a plan view, and is a second shrinkage regulating member 2100. Can be rotatably supported on the upper rear side of the connecting body 120 to switch between a "regulated position" that can be hooked on the front end edge of the connecting body 120 and a "non-regulated position" that is separated from the regulated position. It includes a second support member 2200 (see FIGS. 9A and 9B) that can be used.

Further, as shown in FIGS. 9 (a), 9 (b) and the like, the second shrinkage regulating member 2100 is provided.
(1) It has a hook portion 2111 having a hook shape with its tip bent downward so that it can be hooked on the front edge portions (metal portions) 122 (see FIG. 10) on both the left and right sides of the connecting body 120 at the same time. A pair of left and right L-shaped stopper members 2110L, 2110R,
(2) The L-shaped stopper member 2110 is welded and fixed to the left and right end portions 2120L and 2120R, and the second support member 2200 is inserted into the tubular portion 2120 as the axis of rotation.
(3) The L-shaped stopper member 2110 is rotated and fixed via a second relay cable or the like, which will be described later, which is welded and fixed to the outer peripheral side surface of the tubular portion 2120 at a position shifted to the right from the central portion in the left-right width direction. , A rotating stay 2130 for switching the L-shaped stopper member 2110 to either a "regulated position" or a "non-regulated position" is provided.

As shown in FIG. 9A, the rotating stay 2130 has a symmetrical shape between the rear end portion 2130a and the front end portion 2130b centering on the mounting hole 2131 mounted on the tubular portion 2120. The connecting holes 2132a of the second inner cable 2320 and the connecting holes 2132b of the second tension spring 2400 for releasing the regulation, which are formed at the respective ends, are arranged at symmetrical positions.

Further, as described above, the rotating stay 2130 is arranged at a position shifted to the right from the central portion in the left-right width direction of the tubular portion 2120. In this configuration, the rotating stay 2130 is offset from the center of the lifting hydraulic cylinder 110 to the right side of the machine body, and is positioned so as not to interfere with the hydraulic cable.

In this way, when the pair of left and right L-shaped stopper members are switched to the "regulated position", the hook portions 2111 at the tips of the pair of left and right L-shaped stopper members 2110L and 2110R are the front ends on both the left and right sides of the connecting body 120. Since it comes to a position where it can be hooked on the edge portion 122 (see FIG. 10) at the same time, it does not interfere with the elevating cylinder rod 111 or the like, and it is possible to prevent the elevating cylinder rod 111 from being damaged or damaged.

Further, when the L-shaped stopper members 2110L and 2110R are arranged on both the left and right sides and the L-shaped stopper member is switched to the "regulated position" in this way, the tip portions of the pair of left and right L-shaped stopper members 2110L and 2110R. The hook portion 2111 of the above is configured to be in a position where it can be hooked on the front side edge portions 122 (see FIG. 10) on both the left and right sides of the connecting body 120 at the same time. Since it can be dispersed, for example, when the elevating cylinder rod 111 is erroneously contracted (for a short time), the second contraction regulating member 2100 is prevented from coming off or being damaged. Further, in this case, by hooking on the left and right front end edge portions 122 of the connecting body 120, the load is applied to the left and right in a well-balanced manner, so that the deformation of the connecting body 120 can be prevented.

Further, when the operator sets the hydraulic lock lever 17 to the "fixed" position after adjusting the lifting operation lever 16 to the position where the vehicle height is raised to the maximum, the L-shaped stopper members 2110L and 2110R are used. Even if the hook portion 2111 is rotated to the "regulated position", the rear end surface 2111a of the hook portion 2111 is located slightly forward of the front end edge portions 122 (see FIG. 10) on both the left and right sides of the connecting body 120 to prevent interference. The rear end surface 2111a of the hook portion 2111 (see FIGS. 9A and 9B) interferes with the front end edges 122 on both the left and right sides of the connecting body 120 because the hook portion 2111 is configured to have a gap. It does not interfere with the elevating cylinder rod 111, the spring holder 113, or the like.

As a result, when the operator switches the hydraulic lock lever 17 from the "release" position to the "fixed" position, the L-shaped stopper members 2110L and 2110R move from the non-regulated position to the regulated position, and the connector 120 Interference with other constituent members such as the front edge portions 122 on both the left and right sides and the spring holder 113 can be prevented, smooth rotation can be realized, and damage due to interference between the members can be prevented.

Further, when the operator sets the hydraulic lock lever 17 to the "fixed" position after adjusting the lifting operation lever 16 to the position where the vehicle height is raised to the maximum, the L-shaped stopper members 2110L and 2110R are set. After rotating to the "regulated position", the elevating cylinder rod 111 contracts over time, and as described above, the initially secured gap for preventing interference is absorbed and disappears, resulting in the result. , The rear end surface 2111a (see FIGS. 9A and 9B) of the hook portion 2111 of the L-shaped stopper member 2110L and 2110R is surely hooked on the front end edge portions 122 on both the left and right sides of the connecting body 120. The contraction of the elevating cylinder rod 111 over time is reliably stopped.

Further, when the operator switches the hydraulic lock lever 17 from the "fixed" position to the "release" position, the hydraulic lock is locked after adjusting the lifting operation lever 16 to the position where the vehicle height is raised to the maximum in advance. Since the lever 17 is switched to the "release" position, the contraction of the elevating cylinder rod 111 with the passage of time is eliminated, and when the L-shaped stopper members 2110L and 2110R are separated from the regulated position, the front ends on both the left and right sides of the connecting body 120 are eliminated. Interference with the edge portion 122 can be prevented, and smooth rotation can be realized.

Further, in the present embodiment, unless the vehicle height is basically set to the maximum height, for example, the lower end surface 2111b of the hook portion 2111 of the pair of left and right L-shaped stopper members 2110L and 2110R is connected. Since the hook portion 2111 comes into contact with the upper surface portion of the 120, the rear end surface 2111a of the hook portion 2111 cannot be hooked on the front end edge portions 122 on both the left and right sides of the coupling body 120. It is prevented that the vehicle height cannot be changed due to an erroneous operation of the lever 17, the planting depth is stabilized, and the body is prevented from being damaged.

Further, on the rear back surface of the floor step 15, the second relay cable 2300 for transmitting the movement of the hydraulic lock lever 17 to the rotating stay 2130 extends upward from the rotating stay 2130 in a side view. It is fixed to the lower end of the fixed second outer receiving portion 2380 (see FIGS. 10 and 11).

That is, the front end portion of the second outer cable 2310 of the second relay cable 2300 is fixed to the lower end portion of the second outer receiving portion 2380, and the front end portion of the second inner cable 2320 of the second relay cable 2300 is rotated. It is connected to the rear end portion 2130a of the moving stay 2130 (see FIGS. 9 (a), 9 (b), 10 and 11). Further, the rear end portion (not shown) of the second inner cable 2320 of the second relay cable 2300 is connected to the hydraulic lock lever 17 side.

As a result, when the operator operates the hydraulic lock lever 17 to set it to the "fixed" position and the second inner cable 2320 is pulled and put into a pulled state, the rotating stay 2130 is counterclockwise when viewed from the left side. The pair of left and right L-shaped stopper members 2110L and 2110R move to the regulated position by rotating in the clockwise direction (see arrow D in FIG. 11). In this case, when the pair of left and right L-shaped stopper members 2110L and 2110R come into contact with the upper surface portion 120U of the connecting body 120, the movement of the pair of left and right L-shaped stopper members 2110L and 2110R is stopped. Further, as a result, the hook portions 2111 of the pair of left and right L-shaped stopper members 2110L and 2110R are positioned so as to be hooked on the front side of the front end edge portions 122 on both the left and right sides of the connecting body 120 via the gap for preventing interference. ..

Further, when the operator operates the hydraulic lock lever 17 to change the setting from the "fixed" position to the "release" position, the rotating stay 2130 is released when the pulling state of the second inner cable 2320 is released. , It is set to rotate in the clockwise direction (see arrow E in FIG. 11) in the left side view to move the pair of left and right L-shaped stopper members 2110L and 2110R away from the regulated position and to the non-regulated position. The second regulation release tension spring 2400 is connected between the front end portion 2130b of the rotating stay 2130 and the upper side lower surface portion 31 of the U-shaped pipe 30 (see FIGS. 10 to 11).

As a result, when the second inner cable 2320 is not in the pulled state, the rotating stay 2130 is in the clockwise direction (arrow E in FIG. 11) in the left side view due to the restoring force (contraction force) of the second regulation release tension spring 2400. (See), and the pair of left and right L-shaped stopper members 2110L and 2110R are reliably moved to the unregulated position (see FIG. 12), so that the pair of left and right L-shaped stopper members 2110L and 2110R are arbitrarily regulated. It is possible to prevent the vehicle height from being unable to be adjusted by moving to the position.

The front end of the second outer cable 2310 of the second relay cable 2300 fixed to the lower end of the second outer receiving portion 2380, and the second inner cable 2320 connected to the rear end 2130a of the rotating stay 2130. A second compression spring 2390 (see FIG. 10) is mounted between the front end portion.

As a result, when the second inner cable 2320 is not in the pulled state, the restoring force (extension force) of the second compression spring 2390 eliminates the slack of the second inner cable 2320 and the second tension spring for releasing the regulation. The movement of rotating the rotating stay 2130 by the restoring force of the 2400 in the clockwise direction (see arrow E in FIG. 11) in the left side view is promoted.

Further, the rear end portion 2130a and the front end portion 2130b have a symmetrical shape centered on the mounting hole 2131 of the rotating stay 2130, and the connecting hole 2132a of the second inner cable 2320 and the connecting hole of the second tension spring 2400 for releasing the regulation are connected. Due to the 2132b being arranged symmetrically (see FIG. 9A), the rotating stay 2130 is assembled to the tubular portion 2120 in the front-rear direction, in other words, without distinguishing the mounting surface, at the manufacturing stage. However, since it does not affect the operation, malfunctions due to incorrect assembly do not occur. Further, it is not necessary to form or describe a groove or a pattern for identifying the mounting surface on the rotating stay 2130, which prevents a decrease in the strength of the member and an increase in cost due to processing.

From the above, according to the present embodiment, the second vehicle height maintaining device 2000 having a simple configuration regulates the movement of the lifting hydraulic cylinder 110 of the vehicle height adjusting mechanism 100, so that, for example, long-time work can be performed. When not, it is possible to prevent the lifting hydraulic cylinder 110 of the vehicle height adjustment mechanism from operating and changing in the direction of lowering the vehicle height due to the influence of the weight of the aircraft itself (due to oil leak of the lifting hydraulic cylinder, etc.). The depth of soil adhering to the tip of the fixture (see reference numerals 20a and 20b in FIG. 1) changes and the planting depth is disturbed, and the tip of the fixture is on the floor of the warehouse. It is prevented by a simple configuration that it is continuously in contact with the cylinder and deformed.

The second shrinkage control member 2100 of the present embodiment corresponds to an example of the second shrinkage control member of the present invention, and the second support member 2200 of the present embodiment is an example of the second support member of the present invention. It hits. Further, the hook portion 2111 of the present embodiment corresponds to an example of the hook portion of the present invention. Further, the tubular portion 2120 of the present embodiment corresponds to an example of the tubular portion of the present invention, and the rotating stay 2130 of the present embodiment corresponds to an example of the rotating stay of the present invention.

Further, the second relay cable 2300 of the present embodiment corresponds to an example of the second regulation operating wire of the present invention, and the second regulation release tension spring 2400 of the present embodiment is the second urging of the present invention. This is an example of a member.

As shown in FIG. 13A, a spring steel scraper 37c is attached to the soil covering pressure ring 37 (see FIG. 1) via a cantilever scraper arm 37d, and the soil covering pressure ring 37 (roller 37a) is attached. ) May be configured to remove the mud adhering to the surface.

When the scraper 37c has a spring structure, that is, an elastic body, and the attached mud cannot be removed firmly, the scraper 37c bends and escapes, so that the compression wheel (roller) 37a can be prevented from locking and not rotating.

The compression wheel (roller) 37a is rotatably attached to the roller mounting stay 37b (see FIG. 1).

Further, the scraper 37c may be fixed to the roller mounting stay 37b so as to face an acute angle with respect to the tangent line of the roller 37a. As a result, when a load is applied to the scraper 37c, the scraper 37c bends in a direction away from the roller 37a and escapes.

Further, when removing the mud that cannot be removed by the scraper 37c, the roller 37a may be rotated in the reverse direction. As a result, the scraper 37c bends and comes into close contact with the roller 37a, so that mud can be completely removed.

Further, the scraper 37c may be tilted with respect to the axis of the roller 37a.
As a result, the scraper 37c hits the roller 37a at an angle, so that mud can be easily removed and resistance is reduced.

Further, a plurality of the scrapers 37c may be provided for one roller 37a. As a result, the load is dispersed, so that it is unlikely to become a resistance to rotation of the roller 37a. In addition, only the hard part of the mud bends, and the mud can be removed from the other parts.

Further, as shown in FIGS. 13 (b) and 13 (c), two scrapers 37c may be provided and they may be attached in a C shape. In this case, the mounting position may be outside the roller 37a. As a result, since the two scrapers 37c are attached in a V shape, when the scraper 37c is bent, the scraper 37c moves outward and an angle is established, so that the scraping width is narrowed and the resistance is reduced. Further, in the case of this configuration, the scrapers 37c may be attached alternately. As a result, the position where the mud is dropped is shifted, so that the mud is unlikely to collect on the scraper 37c.

13 (a) is a side view of a main part of the soil-covering pressure ring 37 including the scraper 37c, and FIG. 13 (b) is a rear view of the main part of the soil-covering pressure ring 37 including the scraper 37c. ) Is a rear view of a main part of the soil covering pressure ring 37 indicating that the scraper 37c is arranged in a V shape.

Further, as shown in FIGS. 14A and 14B, the scraper attached to the soil covering pressure ring 37 may be a second scraper 370 made of spring steel formed in a substantially U shape in a plan view. In the case of this configuration, a coil portion (twisted spring portion) 371 is formed at one end of both ends of the U-shape, and both ends thereof are arranged above the rotation center axis of the roller 37a to form the coil. Due to the twisting force of the portion 371, the central portion of the U-shape is in contact with the surface of the roller 37a. As a result, the mud removing performance of the roller 37a is improved. When there is stuck mud, the roller 37a is prevented from being locked by escaping due to the spring force of the coil portion 371.

14 (a) is a plan view of a main part of the soil-covering pressure ring 37 including a scraper (second scraper 370) of another configuration example, and FIG. 14 (b) is a scraper (second scraper 370) of another configuration example. It is a side view of the main part of the soil covering pressure ring 37 provided with.

Further, as shown in FIGS. 15A and 15B, the scraper attached to the soil covering suppression ring 37 may be a third scraper 372 made of spring steel formed in a substantially U shape in a plan view. In the case of this configuration, tension springs 373 are arranged at both ends of the U-shape so as to pull the roller 37a in the direction of the rotation center axis. Further, on the roller mounting stays 37b on both side surfaces of the roller 37a, track guides 374 for guiding both side portions of the U-shaped third scraper 372 so as to be slidable are arranged, and the third scraper 372 The position in contact with the roller 37a is defined. As a result, the mud removing performance of the roller 37a is improved. When there is stuck mud, the roller 37a is prevented from being locked by escaping due to the spring force.

Note that FIG. 15 (a) is a plan view of a main part of the soil covering suppression ring 37 including a scraper (third scraper 372) of another configuration example, and FIG. 15 (b) is a scraper (third scraper 372) of another configuration example. It is a side view of the main part of the soil covering pressure ring 37 provided with.

In the first embodiment, the rotation shaft portion compression spring 1260 has a function of pressing the rotation support arm 1120 to the rear side so that the regulation plate member 1110 is constantly urged to the spring holder 113 side. I explained the case of. However, the present invention is not limited to this, and for example, in addition to the above functions, the rotating shaft portion compression spring 1260 may also have a function as a torque spring.

That is, the function as a torque spring in this configuration is that the operator switches the hydraulic lock lever 17 from the "release" position to the "fixed" position, so that the regulation plate member 1110 changes from the non-regulation position to the regulation position. When the rotation support arm 1120 rotates clockwise in the rear view (see arrow A in FIGS. 4 and 7) so as to move, the rotation shaft compression spring 1260 rotates clockwise in the rear view. By twisting, the restricting plate member 1110 returns from the regulated position to the non-regulated position (direction to release the regulation), that is, the rotation support arm 1120 is counterclockwise in the rear view (FIGS. 4, FIG. (See arrow B in 8) This is a function to generate a rotation torque to be rotated.

As a result, when the operator switches the hydraulic lock lever 17 from the "release" position to the "fixed" position, the regulation plate member 1110 quickly rotates from the non-regulation position to the regulation position, and the contraction regulation member 1100 It is possible to prevent the rotation stopper member 1112 fixed to the inner wall surface from strongly hitting the upper surface of the outer peripheral portion of the rear end portion 112c of the elevating cylinder base 112 and giving an impact to the elevating cylinder base 112. Further, when the operator switches the hydraulic lock lever 17 from the "fixed" position to the "release" position, the restoring force (extension force) of the deregulation compression spring 1400 is generated, and the rotating shaft portion is compressed. Since the generation of the rotational torque by the spring 1260 is added, the regulation plate member 1110 can move more smoothly from the regulated position to the non-regulated position.

Further, in the second embodiment, the configuration in which the hook portion 2111 is hooked on the front end edge portion (metal portion) 122 (see FIG. 10) of the connecting body 120 has been described, but the present invention is not limited to this, and for example, the left and right sides of the connecting body 120 are described. A stopper member (not shown) having a recess or a hole (not shown) on the upper surface on the rear end side of both sides and having a downwardly protruding protrusion on the front side that can be fitted into the recess or the hole. It may be configured so as to be rotatable up and down around the second support member 2200. Even in the case of this configuration, the same effect as described above is exhibited.

Further, in the above embodiment, the case of a seedling transplanter for planting onion seedlings or the like as a transplant target has been described, but the transplant target is not limited to this, for example, a vegetable seedling such as lettuce or a seed potato or the like. There may be.

Further, in the above embodiment, the configuration using the rear wheels 44, which are a pair of left and right drive wheels, has been described as an example of the traveling device, but the configuration is not limited to this, and for example, a configuration using a pair of left and right crawler devices may be used. ..

According to the transplanter of the present invention, it has an effect of being able to prevent a change in vehicle height over time, and is useful as a vegetable transplanter or the like.

1 Seedling transplanter 10 Wheel drive shaft 11 Traveling extension case 13 Lifting arm 17 Hydraulic lock lever 22 Seedling housing 38 Traveling transmission case 39 Mission case 40 Traveling vehicle body 42 Planting device 43 Seedling supply device 44 Rear wheel 45 Front wheel 100 vehicles High adjustment mechanism 110 Lifting and lowering hydraulic cylinder 120 Connecting body 140 Left and right horizontal control hydraulic cylinder 150 Space part 1000 1st vehicle height maintenance device 1100 Shrinkage control member 1110 Control plate member 1120 Rotation support arm 1200 Support member 1210 Rotation shaft part 1220 Boss part 1230 Support member fixing stay 1240 Outer receiving part 1250 Receiving plate member 2000 Second vehicle height maintenance device

Claims (4)

A rotatable transmission case (38) that transmits a driving force to the traveling device (44), a vehicle height adjusting mechanism (100) that rotates the transmission case (38) to adjust the vehicle height, and the traveling vehicle body. A transplanting machine provided in (40) and provided with a planting device (42) for planting an object to be transplanted and a vehicle height maintaining device for regulating a change in vehicle height over time adjusted by the vehicle height adjusting mechanism (100). In
The transplanter characterized in that the regulation of the change in vehicle height is performed by the vehicle height maintaining device restricting the movement of the vehicle height adjusting mechanism (100). In the vehicle height adjusting mechanism (100), a piston (111) that can be expanded and contracted in the front-rear direction is connected to a cylinder portion (110) provided at a cylinder base (112) and a tip portion of the piston (111). A vehicle height adjusting arm (120) connected to the transmission case (38) side is provided.
The vehicle height maintaining device moves in a direction in which the vehicle height is lowered by the vehicle height adjusting arm (120) in a state where the vehicle height is adjusted to a predetermined height or more by the vehicle height adjusting mechanism (100). A second contraction regulating member (2100) that regulates the contraction of the piston (111) by regulating the piston (111).
The transplanter according to claim 1, further comprising a second support member (2200) that rotatably supports the second shrinkage control member (2100). The second support member (2200) is arranged on the rear side of the vehicle height adjusting arm (120).
The second contraction regulating member (2100) includes hook portions (2111) that can be hooked on the left and right front edge portions (122) of the vehicle height adjusting arm (120).
In a state where the vehicle height is adjusted to the predetermined height or higher by the vehicle height adjusting mechanism (100), the second contraction regulating member (2100) rotates and the hook portion (2111) moves to the vehicle height adjusting arm (120). ) Is located on the front side of the left and right front edge portions (122), and then when the vehicle height adjusting arm (120) moves to the front side with the passage of time, the hook of the second contraction regulating member (2100). The invention is characterized in that the contraction of the piston (111) is restricted by hooking the portion (2111) on the left and right front edge portions (122) of the vehicle height adjusting arm (120). 2 The transplant machine described. The second contraction regulating member (2100) has a tubular portion (2120) in which the hook portion (2111) is fixed to both left and right ends and the second support member (2200) is inserted inside as a rotation axis. ), And the second shrinkage regulating member (2100) is rotated on the outer peripheral side surface of the tubular portion (2120) displaced from the central portion in the left-right width direction to either the left or right side. Attach the dynamic stay (2130) and
At one end of the rotating stay (2130), a second regulating actuating wire (2300) that rotates the second contraction regulating member (2100) to be positioned at a regulated position where the regulation is performed when a pulling state is reached. A second urging member (2400) is provided at the other end of the rotating stay (2130) to urge the second contraction regulating member (2100) in a non-regulating direction to release the regulation.
The transplant according to claim 3, wherein the rotating stay (2130) has a symmetrical shape between one end and the other end centering on a mounting hole to be mounted on the tubular portion (2120). Machine.