JP3356382B2 - Implanting device of transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting apparatus for a transplanting machine for planting seedlings such as vegetables on a ridge in a field while traveling.

[0002]

2. Description of the Related Art As a transplanting machine, a frame provided at a rear portion of a traveling body is provided with a planting body which is vertically movable via a swinging link mechanism or the like. The seedlings are supplied at the same time, and then the planting body is lowered and the lower part is pierced into the ridge. At this time, a hole provided in the lower part of the planting body is opened back and forth to form a planting hole in the ridge, There is a method in which seedlings held inside a plant body in a hole are dropped and released through an open punch, and the seedlings are planted in a ridge while running.

[0003] In this transplanter, the swinging link mechanism is driven by transmitting rotational power from an engine by a power transmission mechanism, whereby the plant is vertically moved.

[0004]

In the above-mentioned prior art, there is no problem when the plant is driven in a high rotation range, that is, when the plant is driven both up and down, but in a low rotation range. When the plant is driven (for example, seedlings with loose hypocotyls and poor rooting are planted at low rpm), the plant is powered by the engine when raised. It is driven, but when it descends, it falls due to its own weight of the plant, etc.,
When the planting body turns from descending to ascending (the lowest point of the ascending and descending trajectory of the planting body), there is play in the power transmission mechanism (backlash of gears, claw clutches, spline parts, etc.). You may be in a suspended state.

[0005] If the plant is suspended at the lowest point of the elevating trajectory during planting, the plant is dragged in the soil, and the planting condition of the seedlings is deteriorated. In the case of a ridge covered with a multi-film, there is a problem that the multi-film is hooked. Therefore, it has been considered that a tension spring is provided between the frame and the plant to prevent the plant from falling by its own weight. The spring must be arranged above the upper end position of the track of the appendage, and since the planting body moves up and down greatly, the length of the spring becomes too long, and handling is inconvenient. The spring expands and contracts each time it moves up and down, and the spring oscillates in a radially outward direction. Therefore, consideration must be given to avoid interference with surrounding members, and the spring is dropped and supplied to the planting body. Interference with the seedlings damages the seedlings, so that there is a problem that consideration must be given to avoiding interference with the seedlings.

SUMMARY OF THE INVENTION In view of the above problems, the present invention prevents a temporary stop at the lowest point of the trajectory of an implanted plant, and can be made compact even if such prevention measures are added. The purpose is to provide.

[0007]

The technical means taken by the present invention to achieve the above object is that a first parallel link 23 is supported on a support 21 provided on the traveling body 2 so as to be swingable back and forth.
A second parallel link 27 is supported on the first parallel link 23 via an intermediate member 25 so as to be vertically movable. The planting body 12 is attached to the second parallel link 27, and the second parallel link 27 is driven by the power of the prime mover 7. Drive shaft 3 driven to rotate by
1 to rotate the planting body 12
In the planting device of the transplanter, the planting plant 12 is pushed into the soil and the seedlings are planted when the planting plant 12 is lowered while the planting plant 12 is lowered.
A biasing means 55 for biasing the planting body 12 upward is provided between the side and the second parallel link 27 side.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, the vegetable transplanter 1 is a walking type having a steering handle 3 at the rear part of a traveling body 2, and the soil block seedling is covered with a multi-film while running in the longitudinal direction across a ridge 4. The ridges 4 are automatically planted at predetermined intervals.

The traveling body 2 has an engine (motor) mounted on a mount 6 fixed to the front of the transmission case 5 so as to project forward.
, And is mainly configured with front and rear wheels 8F and 8R on both left and right sides. Power input into the transmission case 5 from the engine 7 is transmitted to a wheel transmission shaft 9A protruding left and right sides. And a first PTO provided rearward of the wheel transmission shaft 9A and protruding to both left and right sides.
It can be taken out from the shaft 9B and the second PTO shaft 9C projecting rearward and upward.

A transplant frame 10 is fixed to the rear portion of the traveling body 2 so as to protrude rearward, and a transplant device 11 is provided on the transplant frame 10. The transplant frame 10 includes a fixed frame 10A fixed to the transmission case 5 and a first frame 10A.
A movable frame 10B pivotally supported by the PTO shaft 9B around the left and right axes and supported so as to be vertically swingable, and the steering handle 3 is fixed to the rear end side of the fixed frame 10A.

The transplanting device 11 includes a plant 12 for planting seedlings in the ridges 4, a plant supplying device 13 for supplying seedlings to the plant 12, and a plant for planting by the action of heat (or cutting). It is provided with a perforation device 14 for previously drilling a hole for transplantation in a multi-film at a position where the film is to be transplanted, and a covering / repressing roller 15 for covering the root of the planted seedling and repressing it. The seedling supply device 13 is provided on the fixed frame 10A, and places a seedling tray T on which a large number of pot portions P in which soil block seedlings are raised are arranged vertically and horizontally, and the pot portions P are arranged in the horizontal direction (lateral direction). Seedling platform 1 that moves intermittently one pitch at a time in the horizontal direction
6 and while the lateral movement of the seedling mounting table 16 is stopped, the seedlings in the pot portion P are pierced and taken out by the seedling removal claws 17 and while the seedling mounting table 16 is moving in the horizontal direction. And a seedling feeding device 18 for transferring seedlings above the planted body 12 and supplying the seedlings to the planted body 12 by dropping.

After a row of seedlings has been taken out of the seedling tray T, the seedling tray T is placed on the pot portion P.
A vertical feed mechanism is provided for transporting in the vertical direction by an amount corresponding to one pitch in the vertical direction. The seedling mounting table 16 and the seedling distribution device 18 are driven by the second PTO shaft 9C. The seedling tray T is made of resin and has flexibility, and is provided with a large number of pots P arranged vertically and horizontally protruding from the rear surface. Floor soil is supplied to each pot P to sow and germinate. Soil block seedlings are raised by raising seedlings.

As shown in FIGS. 1 to 3, the planting body 12,
The piercing device 14 and the soil cover / pressure reduction roller 15 are provided on the movable frame 10B. In particular, the soil cover / pressure reduction roller 15 is provided at the rear of the movable frame 10B, and rolls on the ridge 4 to support the rear portion of the movable frame 10B. I do. The movable frame 10B is formed in a rectangular shape in a plan view having left and right side frame members 19L and 19R pivotally supported by the first PTO shaft 9B.

The planting body 12 is constituted by a cylindrical body having an upper opening and a lower opening, and a beaker-like opener which can be opened and closed back and forth at the lower part. The swing link mechanism 20 includes a first parallel link 23 whose upper end is pivotally supported by a support 21 fixed on a front portion of the movable frame 10B via a lateral support shaft 22 so as to swing back and forth. And an intermediate plate (intermediate member) 25 pivotally supported at the lower end of the first parallel link 23 via a lateral support shaft 24, and the intermediate plate 25 has a front end in the left-right direction so as to swing up and down. And a second parallel link 27 pivotally supported through a support shaft 26 of the plant. The plant 12 is pivotally supported at a rear end of the second parallel link 27 via a support shaft 28 in the left-right direction. ing.

The upper link 2 of the second parallel link 27
A bearing 29 is fixed to a middle portion of the movable frame 10B in the longitudinal direction. Between the left and right frame members 19L and 19R of the movable frame 10B, left and right crank journals 31a are fixed to bearings 30 fixed to the respective side frame members 19 by the left and right shafts. A crankshaft (drive shaft) 31 rotatably supported is provided around the crankshaft 31.
Pin 3 between a pair of left and right crank arms 31b
1c is rotatably fitted to the bearing 29.

The left crank journal 31a protrudes from the bearing 30, and a sprocket 32 is fixed to the protruding portion. A chain extends between the sprocket 32 and the sprocket 33 fixed to the left end of the first PTO shaft 9B. 34 are engaged. Therefore, the implant 1
2 is that the crankshaft 31 rotates in the direction shown by the arrow A in FIG. 2 by the power from the first PTO shaft 9B,
While swinging up and down by the swinging motion of the second parallel links 23 and 27, it swings back and forth and moves up and down so as to draw a long elliptical trajectory in the vertical direction.

At the upper end of the locus, seedlings are dropped and supplied to the planting body 14, and the lower opener enters the ridge 4 at the lower end of the locus. It is opened back and forth, whereby a transplant hole is formed in the ridge 4, and a seedling can be dropped and planted in the transplant hole. In addition, the vertical trajectory of the plant 12 draws a ground trajectory such that the plant 12 enters the ridge 4 from the vertical direction as much as possible and exits in the vertical direction when the transplanter 1 is running. It is set as follows.

FIG. 5 shows a power transmission system of a traveling system and a PTO system. In FIG. 5, the power of the engine 7 is transmitted to the input shaft 37 of the transmission case 5 by the wrapping transmission means 36. The transmission case 5 supports a rotation shaft 38, an intermediate shaft 39, and a back shaft 40 in parallel with the input shaft 37. The gear 41 on the input shaft 37 meshes with the idle gear 42 on the rotary shaft 38. By sliding the clutch gear 43 on the idle gear 42 to engage the engagement portion, the input shaft 37 is engaged. , To the rotating shaft 38. The clutch gear 43 is resiliently pressed in a direction in which it engages with the idle gear 42, and constitutes a pawl-type main clutch.

Between the rotating shaft 38 and the intermediate shaft 39,
A transmission 44 is provided which can be switched between forward first speed (F ₁ ), forward second speed (F ₂ ), forward third speed (F ₃ ), neutral (N), and reverse (R). Also, the intermediate shaft 3
A gear 46 that meshes with a gear 45 fixed to the wheel transmission shaft 9A is provided on the wheel 9, and power is transmitted from the wheel transmission shaft 9A to the rear wheel 8R via a winding transmission 47, and 8R can be driven.

The rotary shaft 38 has one end protruding from the transmission case 5 and an electromagnetic clutch 48 fixed to the outer end thereof. The coupling shaft has a cylindrical shaft shape so as to surround the outer end of the rotary shaft 38. The transmission case 49 is rotatably supported by the transmission case 5, and the rotation shaft 38 and the coupling shaft 49 rotate integrally with the operation of the electromagnetic clutch 48, so that the power of the PTO system is branched out.

A gear 50 is fixed to the coupling shaft 49. The gear 50 meshes with an idler gear 51 loosely fitted to the intermediate shaft 39, and the idler gear 51 is further spline-fitted to the first PTO shaft 9B. The gear 52 meshes with the gear 52 so as to transmit the power of the PTO system. Note that a bevel pinion 53 is fixed to the first PTO shaft 9B,
Meshes with the bevel gear 54 on the second PTO shaft 9C,
The power of the PTO system is branched into two systems and can be taken out from the first PTO shaft 9B and the second PTO shaft 9C. By demagnetizing the electromagnetic clutch 48, the first power can be stopped without stopping the rotation power of the wheel transmission shaft 9A. , The rotation power of the second PTO shafts 9B and 9C can be stopped.

The PTO power transmission system has a backlash at the gear meshing portion and the spline fitting portion (and the clutch meshing portion when a pawl clutch is employed). When the rotation speed of the crankshaft 31 is low, the driving force does not act on the swing link mechanism 20 from the crankshaft 31 when the planting body 12 descends, and the planting body 12 descends by its own weight, A driving force acts on the swing link mechanism 20 from the crankshaft 31 when the state changes from descending to ascending. Therefore, in this case, since the PTO-based power transmission system has backlash, when the plant 12 turns from descending to rising, that is, at the lowest point of the trajectory, the plant 12 is temporarily stopped, and Will be dragged forward in the soil.

For this reason, between the intermediate plate 25 of the swing link mechanism 20 and the bearing 29, an urging means 55 for urging the plant 12 upward is interposed.
Even when the rotation speed of the plant 12 is low, the driving force acts on the swing link mechanism 20 when the plant 12 is lowered, and the plant 12 enters a pause state when the plant 12 turns from lowering to rising. The planting body 12 moves up and down smoothly, the rotation noise is small, and the load on the engine 7 can be reduced.

The biasing means 55 is constituted by a tension coil spring (or another type of tension spring, a string-like elastic body, or the like). One end of the biasing means 55 is connected to the intermediate plate 25.
And the other end is hooked on a locking pin 57 provided on the bearing 29.
The locking pin 57 provided on the bearing 29 is the second parallel link 2
7 and penetrates a support plate 58 fixed to the upper part of the case of the bearing 29 so as to protrude upward.
A screw portion 59 is formed at a rear portion of the locking pin 57, and a pair of nuts 60 is screwed into the screw portion 59, so that the insertion hole of the support plate 58 in front of the locking pin 57 can be used. Has been stopped. The urging force (spring force) of the urging means 55 can be adjusted by changing the screw position of the nut 60.

The urging force of the urging means 55 is
Is located at the position of the lowest point of the trajectory (the position indicated by the solid line in FIG. 1) so as to balance the weight of the planted body 12, the second parallel link 27, the bearing 29, etc. (in other words, the bearing 29 In a state where the crankpin 31c is not inserted into the armature and is not supported by the crankpin 31c, the planted body 12 or the like does not descend by its own weight and is not raised by the urging means 55). When the plant 12 rises from this state, the distance between the locking pins 56 and 57 is slightly reduced, and the urging force of the urging means 55 is weakened.
5 does not have a large variation, therefore, the amount of movement (extension and contraction) in the axial direction is small, the variation of the urging force is small, and even if the urging means 55 is provided, it is possible to make the device compact.

At the highest point of the locus of the plant 12, the urging means 55 contracts, so that the assembling or maintenance is easy.
5 is stretched, so that a desired urging force is applied where necessary. When the plant 12 is urged upward by an excessively large urging force, the plant 12 is moved upward by the urging force, and the driving force is applied to the plant 12 at the highest point of the trajectory. Works, and the movement of the planted body 12 at the locus uppermost point side is not smooth.

When the plant 12 is located at the lowest point of the locus, the urging force of the urging means 55 and the plant 1
2. When the weights of the second parallel link 27 and the bearing 29 are not balanced, and the crankpin 31c is not inserted into the bearing 29 in this state, the planting body 12 is slightly lowered or raised. The main point is that the plant 12
It is sufficient that the driving force from the crankshaft 31 always acts on the (swing link mechanism 20). Therefore, the biasing means 55 is not limited to being interposed between the intermediate plate 25 and the bearing 29,
And the second parallel link 27 may be provided.
For example, one end of the urging means 55 is connected to the first parallel link 23.
Alternatively, the other end may be hooked on the second parallel link 27.

[0028]

According to the present invention, by providing the urging means 55 for urging the planting body 12 upward, the planting body 12 enters the soil when the rotation speed of the drive shaft 31 is low. The planting body 12 can be moved up and down by the driving force of the drive shaft 31 until the planting body 12 comes out of the soil, so that the planting body 12 can be prevented from being suspended in the soil, and the seedlings can be planted well. And the load on the prime mover 7 can be reduced.

Further, by providing the urging means 55 between the first parallel link 23 side and the second parallel link 27 side, it is possible to incorporate the urging means 55 compactly.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a planting device.

FIG. 2 is an overall side view of the planting device.

FIG. 3 is an overall plan view of the planting device.

FIG. 4 is an overall side view of the transplanter.

FIG. 5 is a system diagram showing a power transmission system of a traveling system and a PTO system.

[Explanation of symbols]

 2 Running Body 7 Engine (Motor) 12 Planting Body 21 Support 23 First Parallel Link 25 Intermediate Plate (Intermediate Member) 27 Second Parallel Link 31 Crankshaft (Drive Shaft) 55 Biasing Means

Claims (1)

(57) [Claims] 1. A first parallel link (23) is supported on a support (21) provided on a traveling body (2) so as to be able to swing back and forth, and an intermediate member (25) is mounted on the first parallel link (23). A second parallel link (27) is vertically movably supported through the second parallel link (27).
The planting body (12) is attached to the parallel link (27), and the second parallel link (27) is moved up and down by rotation of a drive shaft (31) driven to rotate by the power of the prime mover (7). When the plant (12) is moved up and down and the plant (12) is lowered, the plant (1) is moved downward.
2) The planting device of a transplanter in which the seedlings are planted by rushing into the soil, wherein the first parallel link (23) side and the second parallel link (2)
7) An implanting device for an implanting machine, comprising an urging means (55) for urging the implanted body (12) upward between the side and the side.