CN211531798U - Transplanting machine - Google Patents

Abstract

The utility model provides a can prevent the transplanter of the change that the vehicle height produced along with time process. The transplanting machine is provided with: a transmission case for transmitting a driving force to the traveling device; a vehicle height adjusting mechanism (100) for adjusting the vehicle height by rotating the transmission case; a planting device (42); and a vehicle height maintaining device (1000) for limiting the change of the vehicle height along with the time, wherein the limitation of the change of the vehicle height is performed by the vehicle height maintaining device limiting the action of a vehicle height adjusting mechanism, the vehicle height adjusting mechanism is composed of a cylinder part (110) provided with a telescopic piston (111) on a cylinder base part (112), and a vehicle height adjusting arm (120) connected with the front end part of the piston and connected with the transmission case side, the vehicle height maintaining device is composed of a contraction limiting component (1100) for limiting the contraction of the piston by penetrating into a space part between the cylinder base part and the vehicle height adjusting arm, and a supporting component (1200) for rotatably supporting the contraction limiting component.

Description

Transplanting machine

Technical Field

The utility model relates to a transplanting machine such as vegetable transplanting machine.

Background

The transplanting machines shown in patent documents 1 and 2 include a traveling device that can adjust the height of the transplanting machine by vertically rotating a traveling transmission case by extending and contracting a lift cylinder.

When the seedling planting device is left in contact with the ground for a long time, the seedlings cannot be planted at the set planting depth due to the adhesion of soil, and the lower end portion of the seedling planting device may be deformed, so that the vehicle height is generally raised to the maximum at the time of rest in the work or when stored in a warehouse.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-136976

Patent document 2: japanese patent laid-open publication No. 2017-175998

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

However, in the lift cylinder and the hydraulic circuit for extending and contracting the lift cylinder, the force is continuously applied in the direction of lowering the vehicle height by the weight of the vehicle body, and the hydraulic oil may flow out little by little with the passage of time to contract the lift cylinder. Therefore, the vehicle height is lowered, the seedling planting device is in a state of contacting with the ground, and the problems of adhesion of soil and deformation of the seedling planting device are caused.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a transplantation machine capable of preventing a change in vehicle height with time.

Means for solving the problems

Scheme 1's utility model is a transplanter possesses: a rotatable transmission case 38 that transmits a driving force to a traveling device 44; a vehicle height adjusting mechanism 100 for adjusting a vehicle height by rotating the transmission case 38; a planting device 42 for planting the transplant object; and a vehicle height maintaining device 1000 that restricts a change in the vehicle height adjusted by the vehicle height adjusting mechanism 100 with time, wherein the restriction of the change in the vehicle height is performed by the vehicle height maintaining device 1000 restricting an operation of the vehicle height adjusting mechanism 100.

The transplanter according to claim 1 of claim 2, wherein the vehicle height adjusting mechanism 100 includes a cylinder 110 having a cylinder base 112 provided with a piston 111 that can expand and contract, and a vehicle height adjusting arm 120 connected to a distal end portion of the piston 111 and connected to the transmission case 38 side, and the vehicle height maintaining device 1000 includes a contraction restricting member 1100 that restricts contraction of the piston 111 by entering a space 150 between the cylinder base 112 and the vehicle height adjusting arm 120, and a support member 1200 that rotatably supports the contraction restricting member 1100.

The transplantation machine according to claim 2 of the present invention according to claim 3, wherein a biasing member 1260 for biasing the contraction limiting member 1100 toward the vehicle height adjusting arm 120 is provided between the contraction limiting member 1100 and the support member 1200, and when a width of the space changes in a contraction direction with time after the contraction limiting member 1100 enters the space, the contraction limiting member 1100 moves in a direction of compressing the biasing member 1260 along an axial direction of the piston 111, and one end side of the contraction limiting member 1100 abuts against the support member 1200, thereby limiting contraction of the piston 111.

The utility model of aspect 4 is the transplantation machine according to aspect 2 or aspect 3, including:

a restraining operation cable 1300 which is positioned at a restraining position by rotating the contraction restraining member 1100 to enter the space portion when the cable is in the pulled state; and a restriction releasing spring 1400 that is positioned at a non-restriction position by rotating the contraction restricting member 1100 to move away from the space portion when the pulled state of the restriction operation cable 1300 is released.

Utility model of aspect 5 the transplanter according to aspect 2 or aspect 3, wherein,

the contraction restricting member 1100 of the vehicle height maintaining device 1000 is configured to be able to enter the space 150 between the cylinder base 112 and 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.

The utility model has the following effects.

According to the utility model of scheme 1, the change that the vehicle height produced along with time process can be prevented.

In addition, since the vehicle height maintaining device 1000 can prevent the vehicle height from being changed by the operation of the vehicle height adjusting mechanism 100 due to the influence of the self-weight of the body when the operation is not performed for a long time by limiting the operation of the vehicle height adjusting mechanism 100, the depth of the soil in the soil is prevented from being changed by the soil attached to the planting device 42, and the planting depth is prevented from being disordered.

In addition, since the vehicle height can be prevented from being lowered during a storage period in which the vehicle is left standing for a long time, the planting device and the like can be prevented from being deformed by continuing contact with the ground.

According to the utility model of aspect 2, in addition to the effects of the utility model of aspect 1, the contraction of the piston 111 is restricted by causing the contraction restricting member 1100 to enter between the sliding side and the fixed side, thereby preventing the piston 111 from contracting due to the influence of the body weight or the like to cause a change in the vehicle height.

According to the invention of claim 3, in addition to the effect of the invention of claim 2, since the contraction restricting member 1100 can enter the space portion with a gap, the contraction restricting member 1100 can be prevented from damaging the cylinder portion 110.

Further, by configuring such that the contraction restricting member 1100 is constantly urged toward the vehicle height adjusting arm 120 by the urging member 1260, when the restriction of the contraction restricting member is released, the contraction restricting member can be prevented from interfering with the support member 1200 when the contraction restricting member is separated from the restriction position, and thus smooth rotation can be achieved.

According to the invention of claim 4, in addition to the effects of the invention of claim 2 or claim 3, when the restraining operation cable 1300 is not pulled, the contraction restricting member 1100 moves to the non-restraining position, and thus it is possible to prevent the contraction restricting member from moving to the restraining position and making it impossible to adjust the vehicle height.

Further, the contraction restricting member 1100 is rotated without entering between the sliding-side tip end portion and the fixed-side end portion, thereby preventing damage to the cylinder portion.

According to the utility model of aspect 5, in addition to the effects of the utility model of aspect 2 or aspect 3, the piston of the cylinder portion is extended to a predetermined height or more, and if the piston is not at a vehicle height of the predetermined height or more, the contraction restricting member cannot be moved to the restriction position, so that the vehicle height cannot be changed due to an erroneous operation, and the stability of the planting depth and the damage of the machine body are realized.

Drawings

Fig. 1 is a left side view of the vegetable transplanter.

Fig. 2 is a top view of the vegetable transplanter.

FIG. 3 is a schematic plan view of a vehicle height adjustment mechanism of the vegetable transplanter.

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

Fig. 5 is a schematic plan view of a main portion showing a state in which the vehicle height maintaining device is at the restricting position.

Fig. 6 is a left side view of a main part of the vehicle height maintaining device in a limited position.

Fig. 7 is a rear view of a main part of the vehicle height maintaining device in a limited position.

Fig. 8 is a rear view of a main part of the vehicle height maintaining device in a non-restricted position.

In the figure:

22-seedling collection body, 38-transmission case for traveling, 42-planting device, 44-traveling device (rear wheel), 100-vehicle height adjusting mechanism, 110-hydraulic cylinder for lifting, 111-piston, 112-cylinder base, 120-vehicle height adjusting arm, 140-horizontal control cylinder, 150-space portion, 1000-vehicle height maintaining device, 1100-contraction limiting member, 1110-limiting plate member, 1200-supporting member, 1260-force applying member, 1300-limiting operation cable, 1400-limiting releasing spring, 2000-second vehicle height maintaining device.

Detailed Description

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

Fig. 1 is a side view showing a seedling transplanter 1 for transplanting onion seedlings or the like as an example of the transplanter, and fig. 2 is a plan view of the seedling transplanter 1.

In the following description, the side on which the operation handle 47 is disposed is referred to as the rear side, and the opposite side, that is, the side on which the engine 41 is disposed is referred to as the front side. The right-hand side is set to the right and the left-hand side is set to the left toward the front side of the body.

The seedling transplanter 1 includes: a traveling vehicle body 40 capable of traveling forward; an operation handle 47 for walk-like operation provided at the rear part of the traveling vehicle body 40; a planting device 42 for planting seedlings in the field; and a seedling supplying device 43 for supplying seedlings to the planting device 42.

Further, an operator seat 46 is provided on which an operator rides and performs a seedling replenishing operation to the seedling supply device 43.

The planting device 42 includes a first planting tool 20a and a second planting tool 20b, and the first planting tool 20a and the second planting tool 20b are configured to repeatedly move up and down via the up-down movement mechanism 21 by power from inside the planting transmission case 26.

The seedling supply device 43 includes a plurality of cup-shaped seedling accommodating bodies 22 that receive seedlings replenished by an operator from above and accommodate the seedlings inside, and is configured such that the plurality of seedling accommodating bodies 22 are arranged in a substantially elliptical shape in plan view and are capable of revolving movement.

Thus, the structure is as follows: at the upper position of each planting device, the bottom of the seedling collecting and releasing body 22 is opened and the seedlings fall down into the planting device, and each planting device plants the fallen seedlings in the farmland in sequence.

Further, an operation handle 47 is provided at a rear end portion of the body frame 19 whose front end portion is fixed to the transmission case 39.

Further, a pair of right and left soil-covering ground-pressing wheels 37 are provided in the vicinity of the right and left sides behind the planting devices 20a, 20 b.

The traveling vehicle body 40 includes: an engine 41; rear wheels 44 as a pair of left and right traveling devices that are driven to rotate by transmitting power of the engine 41; and a pair of left and right front wheels 45 rollably supported in front of the rear wheels 44.

The transmission case 39 is disposed on the rear side of the engine 41. The transmission case 39 has a case portion extending leftward from the engine 41, and is connected to the left side of the engine 41. An output shaft of the engine 41 enters the case portion and transmits power to a transmission mechanism in the transmission case 39.

Front portions of the transmission case 38, which is long in the front-rear direction, are rotatably attached to both left and right side portions of the transmission case 39. Specifically, a substantially cylindrical traveling bellows 11 that is rotatable integrally with the transmission case 38 is provided on the body inner side portion of the front portion of the transmission case 38, and the transmission case 38 is rotatably attached to both left and right side portions of the transmission case 39 by rotatably attaching the traveling bellows 11 to both left and right side portions of the transmission case 39. A rear wheel 44 is attached to the rear wheel axle 12 projecting laterally to the rear of the transmission case 38.

The front end of the wheel drive shaft 10 extending from the transmission case 39 to the right and left outer sides enters the rotation axis position of the front portion of the transmission case 38, and the power for traveling is transmitted to the transmission mechanism in the transmission case 38 through the traveling transmission section in the transmission case 39. Moreover, the following structure is made: the power for traveling is transmitted to the rear end axle 12 of the transmission case 38 via a transmission mechanism in the transmission case 38, and the rear wheel 44 is rotationally driven.

In addition, the following structure is made: the drive of the left and right rear wheels 44 is disconnected by left and right side clutches (not shown) provided in the transmission case 39. Therefore, when the body is rotated, the left and right rear wheels 44 on the inner side of the rotation side clutch can be smoothly rotated in a non-driving state.

In the seedling transplanter 1 of the present embodiment, a vehicle height adjusting mechanism 100 (see fig. 3) for moving the rear wheels 44 upward and downward is provided with the front portion side of the transmission case 38 as a pivot. Fig. 3 is a schematic plan view schematically showing the vehicle height adjusting mechanism 100.

The specific structure of the vehicle height adjusting mechanism 100 is as follows. An upward-extending lifting arm 13 is integrally attached to an outer peripheral portion of the traveling telescopic box 11, which is a connection portion of the transmission case 38 to the transmission case 39. The pair of left and right elevating arms 13 are connected to both left and right sides of the vehicle height adjusting arm 120 via a connecting rod or the like. Further, the front end portion of the lift cylinder rod 111 of the lift cylinder 110 is attached to the center portion in the left-right width direction of the vehicle height adjusting arm 120, and the front end portion 112a side of the lift cylinder base 112 of the lift cylinder 110 is fixed to the transmission case 39.

As shown in fig. 3, the right lifting arm 13 is connected to the right end 120R of the vehicle height adjusting arm 120 via a connecting rod 130, and the left lifting arm 13 is connected to the left end 120L of the vehicle height adjusting arm 120 via a horizontally controlled cylinder 140 that can be extended and contracted in accordance with the inclination of the vehicle body.

Further, the front end portions of the left and right horizontal control cylinder rods 141 of the horizontal control cylinder 140 are attached to the left end portion 120L of the vehicle height adjusting arm 120, and the front end portion sides of the left and right horizontal control cylinder bases 142 of the horizontal control cylinder 140 are coupled to the left lifting arm 13.

When the lifting cylinder 110 is operated by operating the lifting lever 16 (see fig. 1) and the lifting cylinder rod 111 is projected rearward of the body, the left and right lifting arms 13 are rotated rearward, and accordingly, the left and right transmission cases 38 are rotated downward about the wheel drive shaft 10 as a rotation axis, and the body is raised. Conversely, when the lift cylinder rod 111 of the lift cylinder 110 moves forward in the body and is pulled into the cylinder base 112, the left and right lift arms 13 rotate forward, and accordingly, the left and right transmission cases 38 rotate upward about the wheel drive shaft 10 as the rotation axis, and the body descends.

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

Further, a vehicle height maintaining device 1000 is provided, and the vehicle height maintaining device 1000 is configured to be positioned on the "fixed" side by operating a hydraulic lock lever 17 (see fig. 1) in a state where the operator operates the up-and-down operation lever 16 (see fig. 1) to adjust the vehicle height to the position of the maximum elevation, thereby preventing the vehicle height adjusted to the position of the maximum elevation from changing in a direction of decreasing with the passage of time. The vehicle height maintaining device 1000 will be described later.

The hydraulic cylinder 110 for elevation is operated by a sensor plate 14 (see fig. 1) which is in contact with the ridge surface and is operated in accordance with the fluctuation of the vertical interval between the body and the ridge surface, in addition to the operation of the elevation operation lever 16 by the operator. The operation of the sensor plate 14 is an operation of detecting the height of the upper surface of the ridge with reference to the position of the body, and the hydraulic cylinder 110 for elevation operates in a structure in which the height of the body is set in accordance with the height of the upper surface of the ridge based on the detection operation of the sensor plate 14.

When the horizontal control cylinder 140 is extended or contracted, the left lifting arm 13 connected to the horizontal control cylinder 140 is rotated, and only the left rear wheel 44 is moved up and down, thereby tilting the body in the left-right direction. The horizontal control cylinder 140 is made as follows: the operation is performed based on the detection result of a sensor for detecting the left and right inclination of the body with the left and right horizontal levels as a reference, and the body is made horizontal in an inclined area.

Hereinafter, the vehicle height maintaining device 1000 according to the present embodiment will be further described mainly with reference to fig. 4 to 8.

That is, the vehicle height maintaining device 1000, as mainly shown in fig. 4, includes:

(1) a contraction regulating member 1100 (see fig. 4) that regulates contraction of the lift cylinder rod 111 by operating the hydraulic lock lever 17 to enter a space 150 (see fig. 3) generated between a step 112d (see fig. 3) between the base main body 112b and the rear end 112c of the lift cylinder base 112 and a spring holder 113 (see fig. 3 and 5) that holds a spring 121 disposed between the front end side of the lift cylinder rod 111 and the vehicle height adjusting arm 120, in a state where the vehicle height is regulated to a position where the vehicle height is maximally raised by operation of the lift operation lever 16, and the space 150 (see fig. 3); and

(2) and a support member 1200 (see fig. 4) fixed to an upper surface portion of the base main body 112b of the lift cylinder base 112, rotatably supporting the contraction restricting member 1100, and switching between a "restricting position" in which the contraction restricting member enters the space portion 150 and a "non-restricting position" in which the contraction restricting member is separated from the space portion 150.

As shown in fig. 4 and the like, the contraction restricting member 1100 includes:

(1) a regulation plate member 1110 formed in a substantially コ -like shape and configured to be insertable into the space 150 generated in a state where the vehicle height is adjusted to a position where the vehicle height is maximally raised by operation of the lift operation lever 16; and

(2) the pivot support arm 1120 has one end 1120a fixed to the front left side surface of the regulation plate member 1110 by welding and the other end 1120b fixed to the pivot shaft portion 1210 of the support member 1200, and supports the vertical pivoting of the regulation plate member 1110.

A spring holder abutment member 1111 is welded and fixed to the rear end edge portion 1110b of the restriction plate member 1110, and the spring holder abutment member 1111 is a substantially arc-shaped member and is configured to be able to abut against the front end edge portion 113a (see fig. 3 and 5) of the spring holder 113 when the contraction restriction member 1100 is located at the "restriction position".

Further, a rotation restricting member 1112 is provided, and the rotation restricting member 1112 is a plate-like member welded and fixed to the inner wall surface in the vicinity of the front end edge portion 1110a of the restricting plate member 1110 and protruding downward, and when the contraction restricting member 1100 is rotated toward the "restricting position", the lower end edge portion 1112a of the plate-like member abuts against the outer peripheral upper surface of the rear end portion 112c of the lift cylinder base 112, thereby preventing the restricting plate member 1110 from excessively entering the space portion 150.

Further, the lower end edge 1112a of the rotation restricting member 1112 is formed in a substantially arc shape recessed downward to the upper side so as to follow the curved surface shape of the outer peripheral upper surface of the rear end portion 112c of the lift cylinder base 112.

Thus, the rotation restricting member 1112 provided on the inner wall surface in the vicinity of the leading end edge portion 1110a of the restriction plate member 1110 prevents the restriction plate member 1110 from entering the space portion 150 excessively, and therefore, the restriction plate member 1110 can be prevented from being pressed strongly against the lift cylinder rod 111 or the like to damage or break the lift cylinder rod 111.

As shown in fig. 4 and the like, the support member 1200 includes:

(1) a rotation shaft portion 1210 having a rear end portion 1210b welded and fixed to the other end portion 1120b of the rotation support arm 1120 of the contraction prevention member 1100, and a front end portion 1210a side inserted through the cylindrical boss portion 1220 and rotatably held; and

(2) a receiving plate member 1250 having a boss portion 1220 fixed through one end (left side in plan view), a support member fixing stay 1230 having a substantially Z-shape in side view welded and fixed to the other end (right side in plan view), an external receiving portion 1240 fixed to the tip of an external cable of the restraining operation cable 1300, which will be described later, welded and fixed to the vicinity of the boss portion 1220, and a front end edge portion 1110a of the restraining plate member 1110 being capable of coming into contact with the back surface portion 1251.

The support member fixing stay 1230 is fixed to the upper surface portion of the base main body 112b of the lift cylinder base 112 by a fastening member through a pair of left and right through holes formed in the lower plate 1231 on the lower side thereof. In addition, the structure is as follows: the pedal 15 is fixed to the upper plate 1232 on the upper side of the support member fixing stay 1230 by the fastening member through a pair of left and right through holes formed therein.

The biasing member 1260 is attached to a portion of the rotation shaft portion 1210 on the rear end portion 1210b side that is exposed from the boss portion 1220, and has a function of pressing the rotation support arm 1120 rearward so as to always bias the restricting plate member 1110 toward the spring holder 113 side.

As described above, by the configuration in which the restriction plate member 1110 is constantly biased toward the spring holder 113, the front end edge portion 1110a of the restriction plate member 1110 is separated from the back surface portion 1251 of the receiving plate member 1250 as long as the lift cylinder rod 111 does not contract with time.

Therefore, when the hydraulic lock lever 17 is set at the "fixed" position after the operator operates the up-and-down operation lever 16 to adjust the vehicle height to the maximum raised position, even if the restriction plate member 1110 is rotated to the "restriction position", the width in the front-rear direction thereof is smaller than the width in the front-rear direction of the space portion 150 (see fig. 3), and thus the front end edge portion 1110a of the restriction plate member 1110 and the rear surface portion 1251 of the receiving plate member 1250 are prevented from interfering with each other, and the spring holder contact member 1111 fixed to the rear end edge portion 1110b of the restriction plate member 1110 and the spring holder 113 are prevented from interfering with each other.

Accordingly, when the operator switches the hydraulic lock lever 17 from the "release" position to the "fixed" position, interference with the receiving plate member 1250 and the spring holder 113 can be prevented when the restriction plate member 1110 moves from the non-restriction position to the restriction position, and smooth rotation can be achieved. Further, since the restriction plate member 1110 enters the restriction position with a gap in the front-rear direction of the space portion 150, the restriction plate member 1110 can be prevented from interfering with the hydraulic cylinder 110 for lifting and lowering and the like and being damaged.

Further, when the operator switches the hydraulic lock lever 17 from the "release" position to the "fixed" position, since the contraction of the lift cylinder rod 111 with the passage of time does not occur at the initial time, a gap is provided between the front end edge portion 1110a of the regulation plate member 1110 and the back surface portion 1251 of the receiving plate member 1250, and a gap is also provided 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. Then, as time passes, the lift cylinder rod 111 contracts, so that the gap between the spring holder contact member 1111, which is initially fixed to the rear end edge portion 1110b of the regulation plate member 1110, and the spring holder 113 disappears, and thereafter, the regulation plate member 1110 absorbs the gap between the front end edge portion 1110a of the regulation plate member 1110 and the back surface portion 1251 of the receiving plate member 1250 while sliding forward parallel to the axis of the rotation shaft portion 1210 and compressing the urging member 1260 forward.

Further, when the operator switches the hydraulic lock lever 17 from the "fixed" position to the "release" position, the elevation operation lever 16 is operated in advance to adjust the vehicle height to the position where the vehicle height is maximally raised, and then the hydraulic lock lever 17 is switched to the "release" position, so that contraction of the elevation cylinder rod 111 with the passage of time is eliminated, and when the restriction plate member 1110 is away from the restriction position, interference with the receiving plate member 1250 and the spring holder 113 can be prevented, and smooth rotation can be achieved.

Further, if the vehicle height is not set to substantially the maximum height, the limiting plate member 1110 comes into contact with another member (for example, the spring 121) other than the lift cylinder rod 111, and therefore the limiting plate member 1110 cannot be moved to the limiting position (the space portion 150), and therefore, for example, in the transplanting operation, it is prevented that the vehicle height cannot be changed by the erroneous operation of the hydraulic lock lever 17 by the operator, and the planting depth is stabilized, and the damage of the machine body is prevented.

Further, the operation restricting cable 1300 that transmits the operation of the hydraulic lock lever 17 to the pivot support arm 1120 in a rear view is fixed to the lower end portion of the exterior receiving portion 1240 so as to extend obliquely upward from the lower side on the left side of the center position in the left-right width direction of the body and be connected to the pivot support arm 1120.

That is, the tip end 1310a of the external cable 1310 for restricting the operation cable 1300 is fixed to the lower end of the external receiving portion 1240, and the tip end 1320a of the internal cable 1320 for restricting the operation cable 1300 is coupled to the pivoting support arm 1120. A rear end portion (not shown) of the inner cable 1320 of the restraining operation cable 1300 is coupled to the hydraulic lock lever 17 side.

Accordingly, when the operator operates the hydraulic lock lever 17 to set the "fixed" position, and the inner cable 1320 is pulled to be in the pulled state, the pivot support arm 1120 pivots clockwise (see the head a in fig. 4 and 7) when viewed from the rear, and the restriction plate member 1110 moves to the restriction position. At this time, the rotation restricting member 1112 fixed to the inner wall surface of the restricting plate member 1110 abuts on the outer peripheral upper surface of the rear end portion 112c of the lift cylinder base 112, thereby preventing the restricting plate member 1110 from excessively entering the space portion 150.

Further, since the operation of pulling or returning the operation cable 1300 in the region having a space in the lower left portion of the body can be performed by the structure in which the operation cable 1300 is restrained from extending obliquely upward from the lower left side of the center position in the left-right width direction of the body when viewed from the front or rear and is coupled to the pivot support arm 1120, interference between the restraint operation cable 1300 and other components, for example, the sensor plate 14 disposed in the lower right portion so as to be able to pivot upward and downward, the hydraulic hose of the horizontal control cylinder 140, and the like is prevented.

Further, a restriction releasing spring 1400 is attached between the lower end portion of the outer receiving portion 1240 and the distal end portion 1320a of the inner cable 1320, and when the operator operates the hydraulic lock lever 17 to change the setting from the "fixed" position to the "releasing" position and releases the pulled state of the inner cable 1320, the restriction releasing spring 1400 rotates the pivot support arm 1120 counterclockwise in a rear view (see arrow B in fig. 4 and 8), and moves the restriction plate member 1110 away from the restriction position to the non-restriction position (see fig. 4, 7, and 8).

Accordingly, when the inner cable 1320 is not pulled, the restriction plate member 1110 is prevented from moving to the non-restriction position by the restoring force (extension force) of the restriction release spring 1400, and thus the restriction plate member 1110 is prevented from moving to the restriction position at will and being unable to adjust the vehicle height.

According to the above configuration, the vehicle height maintaining device 1000 can prevent the operation of the hydraulic cylinder 110 for elevation of the vehicle height adjusting mechanism 100 from changing in the direction in which the vehicle height is lowered due to the operation of the hydraulic cylinder 110 for elevation of the vehicle height adjusting mechanism due to the influence of the self-weight of the vehicle body (due to oil leakage of the hydraulic cylinder) when the vehicle is not operated for a long time, for example, and can prevent the change in the depth of soil entering the soil due to the soil adhering to the tip of the planting implement (see reference numerals 20a and 20b in fig. 1), the disturbance of the planting depth, and the deformation of the tip of the planting implement due to the continuous contact with the ground surface of the warehouse.

Further, although the transplanting machine for transplanting seedlings of onion or the like as the object to be transplanted has been described, the transplanting machine is not limited thereto, and the object to be transplanted may be a vegetable seedling such as lettuce or a potato seed.

Further, as an example of the traveling device, a configuration using the rear wheels 44 as a pair of right and left driving wheels has been described, but the traveling device is not limited to this, and a configuration using a pair of right and left crawler devices may be employed.

Industrial applicability

According to the present invention, the transplanter has an effect of preventing the change of the vehicle height with the passage of time, and is useful as a vegetable transplanter or the like.

Claims (5)

1. A transplantation machine is provided with: a rotatable transmission case (38) for transmitting a driving force to the traveling device (44); a vehicle height adjusting mechanism (100) for adjusting the vehicle height by rotating the transmission case (38); a planting device (42) for planting the transplanting object; and a vehicle height maintaining device (1000) for limiting the change of the vehicle height adjusted by the vehicle height adjusting mechanism (100) with the passage of time,

the restriction of the change of the vehicle height is performed by restricting the operation of the vehicle height adjusting mechanism (100) by the vehicle height maintaining device (1000).

2. The grafting machine of claim 1,

the vehicle height adjusting mechanism (100) is composed of a cylinder part (110) provided with a telescopic piston (111) at a cylinder base part (112), and a vehicle height adjusting arm (120) connected with the front end part of the piston (111) and connected with the side of the transmission case (38),

the vehicle height maintaining device (1000) is configured from a contraction limiting member (1100) which limits contraction of the piston (111) by penetrating into a space (150) between the cylinder base (112) and the vehicle height adjusting arm (120), and a support member (1200) which rotatably supports the contraction limiting member (1100).

3. The grafting machine of claim 2,

a biasing member 1260 for biasing the contraction limiting member 1100 toward the vehicle height adjusting arm 120 is provided between the contraction limiting member 1100 and the support member 1200,

when the width of the space section changes in the contraction direction with the passage of time after the contraction limiting member (1100) enters the space section, the contraction limiting member (1100) moves in the axial direction of the piston (111) in the direction of compressing the biasing member (1260), and one end side of the contraction limiting member (1100) abuts against the support member (1200) side, thereby limiting the contraction of the piston (111).

4. The transplantation machine according to claim 2 or 3, comprising:

a restricting operation cable (1300) which is positioned at a restricting position by rotating the contraction restricting member (1100) to enter the space portion when the cable is in the pulled state; and

and a restriction releasing spring (1400) that is positioned at a non-restriction position by rotating the contraction restricting member (1100) to move away from the space when the pulled state of the restriction operating cable (1300) is released.

5. Transplanting machine according to claim 2 or 3,

the contraction limiting member (1100) of the vehicle height maintaining device (1000) is configured to be capable of entering a space (150) between the cylinder base (112) and 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).

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