JPH0670613A - Transplanting device - Google Patents

Abstract

PURPOSE:To provide a transplanting device simplified in structure, designed to transplant on a farm seedling blocks held elastically by the seedling holding frame of a rice transplanter at its upper end part by a transplanting claw subject to vertical motion with its attitude kept horizontal and to opening/closing through a cam mechanism. CONSTITUTION:A revolving case 2 to be driven around a horizontal driving shaft 1 is equipped with an arm 3 to be revolved in the opposite direction for the case 2, and a supporting plate 6 for a transplanting claw 5 is revolvably supported on a horizontal supporting shaft 4 fixed to the arm 3. A guide means 7 is provided to maintain the claw 5 horizontally via this supporting plate, and a cam 8 for opening/closing the claw is fixedly equipped on the horizontal supporting shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a seedling block which is elastically gripped by the outer peripheral surface of the upper end portion of a seedling holding frame of a transplanter.
The present invention relates to a transplanting device that is sandwiched by a transplanting claw that can be opened and closed on the lower surface side of a seedling holding frame, pulled out downward, and transplanted to a field.

[0002]

2. Description of the Related Art A seedling block, which is a soil-bearing seedling grown using a seedling raising device (often called "pot seedling").
In general, the seedling tray of the seedling raising device is placed on a transplanter, and the seedling block is taken out from each pot of the seedling tray and planted in the field. The pot of the seedling tray may be a bottomless one, but even so, the seedling block and the pot are in the shape of an inverted cone (cone or pyramid) and the seedling block is completely inside the pot. The seedling block cannot be taken out from the bottom of the pot because it is stored in. Therefore, for example, as shown in Japanese Examined Patent Publication No. 57-22288, the seedling tray is moved along a conveying path having a lead diameter passage portion on the transplanter, or the Japanese Examined Patent Publication No. Sho 56-78509 and Japanese Patent Laid-Open No. 1-78509. As shown in Japanese Patent No. 141513, the seedlings are placed along a vertical direction on a transplanter, and the seedling block is pushed from the bottom side of the pot by a seedling pushing rod under a state where the pot of the seedling tray is in a substantially horizontal posture. The seedling block is pushed out from the tray in a substantially horizontal direction and discharged.

The seedling block thus pushed out horizontally from the seedling tray is planted in a field after changing its posture from a horizontal posture to an upright posture. Since a certain height is required for this posture change, the position of the center of gravity of the transplanter is increased in the mounting portion of the seedling tray, and a complicated posture changing mechanism is required, which makes the transplanter expensive and
Since the seedling block is moved along a long path for changing the posture, it takes time from extrusion to planting, which is inefficient, but the seedling block is likely to collapse.

In view of this problem, the applicant previously developed a transplantation device as described at the beginning and filed a patent application (Japanese Patent Application No. 4-139977). This transplanting device is designed to sandwich the lower half of the seedling block, which is held by the outer peripheral surface of the upper end of the seedling holding frame of the transplanter, with the transplanting claws, and pulls out downward to transplant to the field. It is possible to take out the seedling block held in the upright posture in the same posture and transplant it to the field. Since it is not necessary to change the posture of the seedling block as described above, the above-mentioned problems can be solved at once. As described later, the seedling holding frame may be the one that directly uses the member of the seedling raising device.

[0005]

By the way, in the transplantation device described in Japanese Patent Application No. 4-139977 mentioned above, the cam mechanism for opening and closing the transplantation claw is operated by a pneumatic actuator. For this reason, in addition to the actuator, a compressor, a valve mechanism, and a position sensor for controlling the valve mechanism by sensing the ascending / descending position of the transplanted nail are required, which is relatively expensive in this respect. Therefore, the present invention intends to further enhance the advantages of this type of transplantation device by incorporating a pawl opening / closing cam that operates at a predetermined position in a mechanism for raising and lowering the transplanted nail while maintaining the horizontal posture.

[0006]

To this end, the present invention relates to a transplantation machine as described above, in which a rotary case 2 fixed to a horizontal drive shaft 1 and rotationally driven about the drive shaft is used. A rotating arm 3 that is rotated in the opposite direction in synchronization with the rotating arm 3 is provided, and a support plate 6 that supports the transplanted claw 5 in a horizontal posture is rotatable on a horizontal support shaft 4 fixed to the rotating arm. A guide means 7 is provided for supporting the support plate while maintaining the posture of the support plate so that the transplantation claw 5 can be moved up and down in a horizontal posture by the rotation of the rotation case 2 and the rotation arm 3 described above. On the other hand, a cam 8 which closes the transplanted nail near the rising end and opens it near the falling end is fixedly provided on the horizontal support shaft 4.

According to the present invention, a seedling pushing tool 9 for pushing a seedling block from the transplanted nail 5 is provided while being supported by the support plate 6, while the cam 8 is synchronized with the opening of the transplanted nail 5. The seedling pushing tool 9 is configured to operate (claim 2).

[0008]

[Function] The transplanting claws 5 rotate in opposite directions.
The upper and lower positions of the support plate 6 are changed along with the rotation of the rotation arm 3 and the posture of the support plate 6 which is rotatable around the horizontal support shaft 4 is maintained by the guide means 7, so that the horizontal posture is maintained. To go up and down. Since the posture of the support plate 6 is maintained by the rotational displacement of the support plate 6 around the horizontal support shaft 4, the cam 8 fixed to the horizontal support shaft 4 can move the cam 8 fixed to the horizontal support shaft 4 along with the elevation of the transfer nail 5. Since the phase of the relationship with the seedling 5 is changed and such a cam 8 closes the transplanting claw 5 near the rising end and opens it near the falling end, the seedlings held by the seedling holding frame of the transplanter. The block is clamped by the transplanting claw 5 by closing in the vicinity of the rising end, and descends while maintaining the horizontal position. The transplanting claw 5 causes the same seedling block to be carried downward while maintaining the upright position. By opening the nail, it can be detached from the planting nail 5 and transplanted to the field.

By providing the seedling pushing tool 9 which is operated in synchronization with the opening of the transplanting nail 5, when the seedling block is detached by opening near the descending end of the planting nail 5, the seedling leaf portion of the block is transferred to the transplanting nail 5. This prevents the seedling block from being detached while it is upright.

[0010]

FIG. 2 shows a self-propelled transplanter equipped with an embodiment of the present invention. This transplanter has front wheels 11 for left and right pairs.
And the rear wheel 12, and the engine 13 is mounted on the front part of the body. The mission case 14 is located at the rear of the engine 13.
The right and left chain cases 15 tilted rearward and downward are attached to both sides of the mission case 14, and the rear wheels 12 are attached to the ends of the chain case 15.
The left and right rear wheels 12 are driven to drive the transplanter. The steering handle 16 is provided so as to rise from the rear portion of the machine body in an upper rear direction. As shown in FIGS. 2 and 3, this transplanter uses front and rear wheels 11 in the groove between the ridges R formed in the field.
It is said that the required transplantation is performed by running 12 and forming a groove G in the center of the ridge R while transplanting a seedling block P into the groove G and then covering the soil. For the type of the groove G, a groove cutter 18 is attached to a stay 17 attached to the lower surface of the mission case 14, and for covering the soil, a pair of left and right chain pressure rollers 19 appropriately supported by the machine body are installed. It is provided.

As shown in FIGS. 2 and 4, a long frame 21 is installed on the upper surface of the machine body in the front-rear direction, and a rear half of the frame 21 supports a seedling table 22 which can be reciprocated left and right. The seedling holding frame 23 is provided on the seedling table 22 so as to be movable back and forth.
The seedling mounting table 22 has a guide rod 22a extending between front and rear edges of a frame body that defines the peripheral edge thereof, and is supported by a rail 24 in the left-right direction attached to the frame body 20 on the front end side. A pair of left and right nut members 2 are provided on the lower surface side of the rear end of the seedling mounting table 22.
2b is attached, and the nut member 22b is screwed onto the reciprocating feed screw 25 in the left-right direction supported by the frame body 21.
The reciprocating feed screw 25 is rotationally driven in the lateral feed case 26 mounted on the frame body 21 to reciprocate the seedling placing table 22 left and right. The transmission to the inside of the lateral feed case 26 is performed from the inside of the mission case 14 through the inside of the transmission case 27 mounted on the frame body 21.

Similarly, as shown in FIGS. 2 and 4, the front half of the seedling table 22 is equipped with a pair of left and right vertical conveyor belts 29.
The seedling holding frame 23 having a large number of seedling holding portions 23a arranged in a matrix has a series of engaging holes 23b provided on both sides thereof.
With the conveying claws 29a of the vertical conveying belts 29 engaged with each other, they are placed on the seedling placing table 22 on the guide rods 22a. The frame 21 is equipped with a vertical feed drive shaft 30 in the left-right direction which is rotationally driven in the transmission case 27, and a drive shaft 31 for the left-right transport band for driving the left-right vertical transport band 29 is provided. It is equipped on the platform 22. Drive cams 32 are attached to both ends of the vertical feed drive shaft 30, and driven cams 33 of which only one end is shown are attached to both ends of the transport belt drive shaft 31, respectively. Similar to the rice seedling mat vertical feed mechanism of the rice transplanter, the vertical feed transport belt 29 is driven by the left and right horizontal feed ends of the seedling table 22 with the driven cam 33 on one side engaged with the drive cam 32 on one side. Transport belt drive shaft 31
The seedling holding frame 23 is directed forward by intermittent rotation drive,
The seedling holding portions 23a are vertically transported to the vertical gap.

FIGS. 5 and 6 are suitable for the seedling holding frame 23
Member (also designated by reference numeral 23 and referred to as "seedling holding frame")
1 shows a nursery device equipped with. That is, the seedling holding frame 23 is made of an appropriate plastic and is combined with a tray 35 made of a harder plastic to form a seedling raising device,
It can be used as it is as a seedling holding frame for transplanters. The tray 35 is formed by arranging a large number of pots 35a in the shape of an inverted truncated cone or a truncated pyramid (inverted quadrangular truncated pyramid in the example) in the same manner as a normal pot seedling raising tray. There is. The seedling holding frame 23 has a fitting groove 23c which is fitted to the stepped fitting portion 35b between the pots 35a of the tray 35, and the pot 3 in the fitted state.
It is said that the seedling holding portion 23a is formed by a large number of low quadrangular truncated pyramid-shaped openings arranged so as to form an extension of 5a. The tray 35 has positioning pins 35c that fit into the through holes 23d of the seedling holding frame 23 and each pot 3
There is also provided an opening 35d formed in the bottom wall of 5a, a clip 35e for engaging with the upper surface of the seedling holding frame 23 and a grip 35f for preventing extraction. The engaging hole 2 is provided in the seedling holding frame 23.
3b are formed, and at the four corners of each seedling grip 23a,
Notch 23e for enhancing elasticity of the seedling gripping portion 23a
Has been formed.

Seedling holding frame 23 and tray 3 shown in FIGS.
No. 5 is assembled as shown in the figure and used as a seedling raising device, and the seedlings are sown and sown after being filled with soil over the inside of the pot 35a and the inside of the seedling gripping portion 23a to be suppressed. After the seedling raising, the clip 35e is removed and the seedling holding frame 23 is removed from the tray 35 as shown by the chain line in FIG. 5, and the seedling holding frame 23 is taken out while holding a large number of seedling blocks P, and the seedlings of the transplanter are used as they are. It can be used as a holding frame. In order to facilitate the removal of the seedling holding frame 23, use a removal aid (not shown) or the like having a large number of protruding pins that are inserted from below into the pot bottom wall opening 35d of the tray 35. You can

As shown in FIGS. 1 and 2, the drive shaft 1 is projected to one side from the inside of the transmission case 14, and the rotating case 2 is welded 37 to the drive shaft 1 as shown in FIG. It is fixed. The rotating arm 3 is fixed to a rotating shaft 38 projecting from the rotating case 2 at an end opposite to the drive shaft 1 by serration fitting and then tightening with a bolt 39. As shown in FIG. 7, a cylinder 40 that supports one end of the drive shaft via a bearing is attached to the mission case 14 with the key 4
It is fixed by 1 and rushed into the rotating case 2,
A gear 42 is formed on the tubular body 40. A gear 43 is fitted to the rotary shaft 38 in the rotary case 2, and an intermediate gear 44 that meshes with these gears 42, 43 is provided in the rotary case 2. Therefore, when the rotating case 2 is rotated about the drive shaft 1 by the drive shaft 1, the intermediate gear 4 is rotated.
4 rotates around the axis of the drive shaft 1 while meshing with the gear 42 to give rotation to the gear 44, and the rotation is transmitted to the gear 43, so that the rotation shaft 38 is opposite to the rotation case 2. Rotate in the direction. Therefore, the rotating arm 3 is rotated in the opposite direction in synchronization with the rotating case 2.

As shown in FIGS. 7-9, the support plate 6 is provided with concentric support tube portions 6a, 6 on both sides of the cam 8 along the left-right direction.
b and a pair of right and left upright supporting cylinders 6c are formed. The horizontal support shaft 4 welded to the end of the rotating arm 3 is inserted into the support cylinders 6a and 6b to support it. It is rotatably supported around the shaft 4. The transplanted claw 5 is composed of left and right claw pieces 5a, and fulcrum pins 5b attached to the respective claw pieces 5a are fitted into the respective supporting cylinder portions 6c to open and close by rotation of the claw pieces 5a. . A coil spring 46 having both ends fitted to the supporting projections 5c on the inner surface of each claw piece 5a is disposed between the claw pieces 5a, and the transplant claw 5 is biased in the opening direction by the spring 46. . The guide means 7 is a guide roller 7a that is rotatably supported at the end of an arm 6d integrally provided on the support tube portion 6b, and a vertical U-shaped plan view that is fixedly supported by the transmission case 14 via a stay 47. And the guide roller 7a is supported in the groove of the guide rail 7b to maintain the posture of the support plate 6 rotatable around the horizontal support shaft 4 in the horizontal posture shown in the figure. .

Similarly, as shown in FIGS. 7-9, the cam 8 is provided between the support cylinders 6a and 6b of the support plate 6 and fixed to the horizontal support shaft 4 by the key 49. On each claw piece 5a, a fulcrum pin 5b is sandwiched and a pin 5d protruding from the inner surface is attached on the opposite side of the coil spring 46, and these pins 5d are abutted on both side surfaces of the cam 8 by the urging force of the spring 46. By doing so, the open / closed state of the transplanted nail 5 is controlled.
The cam 8 has a wide side surface portion 8a and a narrow side surface portion 8 when viewed in the rotation direction.
b, and a pair of inclined side surface portions 8c connecting the two, the pin 5d is in contact with the wide side surface portion 8a, and the transplanted nail 5 is closed as shown by the solid line in FIG.
In the state of being in contact with the narrow side surface portion 8b, the transplanted nail 5 is supposed to be opened as shown by a chain line in FIG. Transplant nail 5
With respect to the cam 8 that changes the relational phase with respect to the transplanted nail 5 with the raising and lowering of the rotary nail 2, the rotating case 2 rotates in the direction of arrow A in FIG. 1, and the rotating arm 3 rotates in the direction of arrow. In the B direction, the cam 8 rotates in the direction of the arrow B, while the pin 5d moves from the narrow side surface portion 8b to the wide side surface via the inclined side surface portion 8c at the rising end position of the transplanted nail 5 in FIG. A state of contacting the portion 8a is obtained and the transplanted nail 5 is closed. In the closed state, the pin 5d contacts the wide side surface portion 8a while the transplanted nail 5 descends as shown in FIGS. It is maintained by maintaining this state, and when the lower end position of the transplanted nail 5 of FIG. 12 is reached, the pin 5d passes through the inclined side surface portion 8c and the narrow side surface portion 8c.
The claw 5 is released until it comes into contact with b, and the open state thereof maintains the contact state of the pin 5d with the narrow side surface part 8b while the claw 5 is rising as shown in FIG. It is provided so that it can be maintained.

As shown in FIGS. 1 and 7-9, the seedling pushing tool 9 is composed of a vertically long plate attached to an advancing / retreating rod 51 which is supported by a supporting cylinder 6e fixed to the supporting plate 6 so as to be able to advance and retract. , Is arranged between both nail pieces 5a of the transplant nail 5. A ring 52 is fixed to the advancing / retreating rod 51, and a coil spring 53 having both ends abutting against the ring 52 and the inner end surface of the support cylinder 6e is disposed on the advancing / retreating rod 51 to move the seedling pushing tool 9 The end of the urging / retracting rod 51 is brought into contact with the peripheral surface of the cam 8. The peripheral surface of the cam 8 is a part of a cylindrical surface centered on the axis of the horizontal support shaft 4,
The protruding portion 8d is formed at a position corresponding to the central portion in the circumferential direction of the narrow side surface portion 8b. As a result, the seedling pushing-out tool 9 is moved by pushing the forward / backward movement rod 51 by the projecting portion 8d of the cam 8 in synchronization with the transplanting nail 5 being lowered to the lowering end position in FIG. 12 and being opened as described above. After that, the spring 53 again causes the spring 53 to retract.

As shown in FIGS. 1 and 2, the transplant nail 5 is obtained by removing one seedling block P from the front row of seedling blocks P held by the seedling holding frame 23 which is sequentially fed forward. It is arranged to be transplanted. Empty seedling holding frame 2
The three parts are moved onto the front half of the frame body 21. Figure 2
Further, as shown in FIGS. 10-13, a U-shaped seedling guide frame 55 in plan view having a front end opened at a height position corresponding to the descending end position of the transplanted nail 5 is supported on the lower surface of the mission case 14 via a stay 56. Is provided. In FIG. 7, reference numeral 57 denotes a sprocket fitted to the drive shaft 1 for transmitting power from the transmission case 14 to the transmission case 27.

According to the illustrated transplanting apparatus constructed as described above, the seedlings elastically gripped by the seedling holding frame 23 by the transplanting claws 5 which are raised to the rising end position in FIG. 1 and closed from the open state. The block P is sandwiched, and the seedling holding portion 23a of the seedling holding frame 23 is slightly elastically expanded by the subsequent lowering of the transplanting nail 5, and is pulled downward as shown in FIG. As shown in FIG. 11, the seedling block P is conveyed downward by being lowered while keeping the upright posture, and as shown in FIG. 12, the seedling block 5 is opened when the nail 5 for transplantation reaches the descending end position. The seedling block P can be extruded into the seedling guiding frame 55 by the pushing tool 9 to be guided by the seedling guiding frame 55 and dropped into the groove G, so that the seedling block P can be transplanted to the field. When the seedling block P is dropped as it is from the opened transplanting nail 5 without providing the seedling pushing tool 9, the seedling leaf portion of the falling seedling block P may be caught by the transplanting nail 5 and the upright posture of the seedling block P may be slightly broken. However, there is no such concern in the illustrated device provided with the pushing tool 9. After that, the transplanted nail 5 is lifted as shown in FIG. 13 in the open state, and when it reaches the rising end, it is closed and the seedlings on the seedling holding frame 23 already sent to the predetermined position at that time. The block P is clamped in the manner described above with respect to FIG.

[0021]

According to the present invention, the cam 8 for opening and closing the transplant nail 5 in the transplantation device of the type described above rotatably supports the support plate 6 for the transplant nail and cooperates with the guide means 7. The support plate 6 and the planting claw 5 are fixedly provided on the horizontal support shaft 4 for maintaining the postures of the planting claw 5 up and down.
The opening and closing of the transplanted nail can be achieved by utilizing the fact that the cam 8 changes the relational phase with respect to the transplanted nail 5 together with the horizontal support shaft 4 by moving up and down. It is possible to eliminate the need for a seedling block posture changing mechanism and to further simplify the structure of the transplantation device having the special advantage of preventing the seedling block from collapsing, and to realize the effect at low cost.

According to the configuration of claim 2, wherein the seedling pushing tool 9 is provided, there is a concern that the seedling leaf part may be caught by the transplanting nail when the seedling block is detached by opening the transplanting nail 5, and the upright posture of the seedling block may be collapsed. The simple structure using the cam 8 can surely eliminate the problem.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view showing a main part of a transplanter equipped with an embodiment.

FIG. 2 is a partially longitudinal side view showing the entire transplanter.

3 is a longitudinal rear view of a portion of FIG.

FIG. 4 is a perspective view of a portion of the implanter.

FIG. 5 is a vertical sectional side view showing a part of a seedling raising device having a seedling holding frame that can be used in a transplanter (a cross section is taken along line VV in FIG. 6).

FIG. 6 is a plan view of a part of the seedling raising device shown in FIG.

FIG. 7 is a partially expanded cross-sectional plan view of the essential parts of the embodiment.

FIG. 8 is an exploded perspective view of a main part of the embodiment.

FIG. 9 is a plan view of a main part of the embodiment.

FIG. 10 is a partial vertical sectional side view for explaining the operation.

FIG. 11 is a partially longitudinal side view for explaining the operation.

FIG. 12 is a partially longitudinal side view for explaining the operation.

FIG. 13 is a partial vertical sectional side view for explaining the operation.

[Explanation of symbols]

 1 Drive Shaft 2 Rotating Case 3 Rotating Arm 4 Horizontal Support Shaft 5 Graft Claw 5a Claw Piece 5b Support Point Pin 5d Pin 6 Support Plates 6a, 6b Support Cylinder 6c Support Cylinder 6d Arm 7 Guide Means 7a Guide Roller 7b Guide Rail 8 cam 8a wide side part 8b narrow side part 8d protruding part 9 seedling extruding tool 22 seedling mounting table 23 seedling holding frame 38 rotary shaft 42, 43 gear 44 intermediate gear 46 coil spring 51 advancing and retracting rod 53 coil spring P seedling block

Claims (2)

[Claims] 1. A seedling block elastically gripped by the seedling holding frame of the transplanter at the outer peripheral surface of the upper end portion is clamped by a transplanting claw that can be opened and closed on the lower surface side of the seedling holding frame and pulled out downward to the field. In a transplantation device for transplantation, a rotary case (2) fixed to a horizontal drive shaft (1) and rotationally driven around the drive shaft is rotated by a rotary case which is rotated in the opposite direction in synchronization with the rotary case. A moving arm (3) is provided, and a horizontal support shaft (4) fixed to the rotating arm rotatably supports a support plate (6) for supporting the transplanted nail (5) in a horizontal posture. A guide means (7) for maintaining the posture of the support plate is provided, and by the rotation of the rotating case (2) and the rotating arm (3), the transplanted nail (5) is driven up and down in a horizontal posture. On the other hand, the nail is closed near the rising end and opened near the falling end. Beam (8),
An implanting device, which is fixedly provided on the horizontal support shaft (4). 2. A seedling pushing tool (9) for pushing a seedling block from the transplant nail (5) is provided while being supported by the support plate (6), and the cam (8) is provided on the nail (5). The transplanting device according to claim 1, wherein the transplanting device (9) is configured to operate in synchronization with the opening of (5).