JPH04173009A - Seedling transplantation apparatus - Google Patents

Abstract

PURPOSE:To rationally improve a driving mechanism and perform the change of the transfer quantity of seedlings without complicating the structure by inserting a guide-block member engaging with a spiral groove into a guide-block holding member, putting the holding member on a screw shaft, engaging and connecting the guide-block holding member to a seedling holding table and reciprocating the seedling holding table in lateral direction. CONSTITUTION:Reciprocating spiral grooves 16 are formed on the outer circumference of a transmission case 2 of a screw shaft 13. A guide-block holding member 18 containing a guide-block member 17 engaging with the spiral groove 16 is put on the screw shaft and the guide-block holding member 18 is connected to a bracket 20 fixed to the seedling holding table 3. The seedling holding table 3 is reciprocated in lateral direction by the rotational motion of the screw shaft 13.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention involves engaging a top member with a spiral shaft having a spiral groove formed on its outer periphery, and by relative lateral movement of these members, planting can be carried out on the river surface. This invention relates to a seedling planting device, which is configured to drive a placed seedling platform in a reciprocating and lateral movement with a constant stroke, and is configured to freely change the number of times a planting claw picks up seedlings with respect to the movement stroke of the seedling platform.

[Conventional technology]

In the above-mentioned seedling planting device, conventionally, for example,
As disclosed in Publication No. 178823, the above-mentioned top member is installed inside a planting transmission case, and the top member is rotationally driven to drive a screw shaft connected to a seedling stand for reciprocating and lateral movement. The operation member for changing the amount of seedlings removed is made to protrude outward from the planting transmission case, and the operation member is connected to the middle part of a long rod installed across the left and right side walls for screw connection to the seedling stand. Some devices have a structure in which a dedicated abutment member for this operation is fixedly installed.

[Problem to be solved by the invention]

With the above structure, when changing the amount of seedlings taken, the width of the seedlings cut by the planting claws will be different, so the switching timing is always made to match the end of the movement stroke of the seedling stand. be.

However, the above-mentioned conventional structure has the disadvantage that dedicated parts such as a long rod and an operating member are required to change the amount of seedlings taken, resulting in a complicated structure.

An object of the present invention is to eliminate the above-mentioned disadvantages.

[Means to solve the problem]

The characteristic configuration of the present invention is that a helical shaft is formed with a helical groove on its outer periphery, and is disposed so as to protrude outward from the planting transmission case, and a helical shaft receiving member that engages with the helical groove is installed inside the helical shaft receiving member. The frame receiving member is interlocked with the seedling stand, so that the seedling stand is reciprocated and horizontally moved in accordance with the rotational drive of the screw shaft. A mechanism for changing the number of seedlings taken by the attached claw is provided, and the top receiving member is disposed on the outer side of the planting transmission case, and the top member is formed in the top receiving member. A contact part that is inserted into the hole, and a lid body that covers the insertion hole is attached to the top receiving member, and the operating tool for switching operation of the seedling removal amount switching mechanism is brought into contact at the stroke end of the seedling stand. is provided on the lid.

[For production]

The screw shaft is rotated by the power from the planting transmission case,
A top member engages with the spiral groove, and a top receiving member disposed on the outside of the planting transmission case and a seedling stand connected thereto are driven to move laterally, and are installed outside of the transmission case. , the abutting part of the lid, which is provided to house the frame member that requires maintenance such as parts replacement due to sliding wear associated with the engagement guide and prevent dust from entering, is located at the stroke end of the seedling stand. In this step, the switching operation tool of the seedling removal amount switching mechanism arranged inside the transmission case is operated by contact.

〔Effect of the invention〕

Therefore, according to the present invention, the drive structure for reciprocating and lateral movement of the seedling stand is rationally improved, and the dust-proof cover of the frame member that requires maintenance such as parts replacement is effectively utilized. It has now become possible to provide an operation for changing the amount of seedlings taken without complicating the process.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 shows a seedling planting device according to the present invention. This seedling planting device is connected to a traveling body (not shown) via a parallel link mechanism (1) so that it can move up and down, and can move back and forth to the left and right with respect to a planting transmission case (2) that also serves as a frame. In addition to supporting the seedling stand (3) in an inclined position, seedlings are placed from the lower end of the seedling stand (3) to the rear of three chain cases (4) extending rearward from the transmission case (2). It is equipped with six planting claws (5) for cutting out and planting the plants, and a grounding float (6) is arranged on the lower side to form a six-row planting format. In addition, for each row on the seedling stand (3),
At the end of the lateral movement stroke, a vertical feeding device (8) of an endless rotary belt (7) type with a protrusion is provided for vertically feeding the placed seedlings downward by a considerable amount at a time.

Next, the transmission structure will be explained. As shown in Figure 1,
From the traveling aircraft side to the planted transmission case (2), insert the transmission shaft (
9) and the input shaft (1) via the bevel gear mechanism (lla).
2), and the input shaft (12) is connected to the transmission chain (14) and the connecting pipe frame (10) to the side of the planting transmission case (2).
Each of the planting claws (5
) to drive the planting.

On the other hand, the input shaft (12) is arranged to protrude outward from the planting transmission case (2) via a gear switching type transmission mechanism (A) as a mechanism for changing the amount of seedlings taken, and the transmission case ( 2) and a screw shaft (13) bearing-supported by a bracket (15) fixed to the pipe frame (10).
) is configured so that power is supplied to the

The support side end of the planting transmission case (2) of the screw shaft (13) is extended to the outside of the case in a cantilevered manner, and an eccentric cam mechanism (22) is provided on this extended portion (13a). At the same time, a rotating support shaft (
A swing arm (25) is disposed to rotatably support a swing arm (24), and a swing arm (25) is movably connected to the swing shaft (24).
) and the eccentric cam mechanism (22) are interlocked so that the pivot shaft (24) swings by a predetermined angle as the screw shaft (13) rotates. Then, the vertical feeding device (8
) for the operating arm (26) of the drive pulley (19a).
) with respect to the pulley support shaft (27), one-way clutch (
The operating arm (26) is attached to the seedling loading table (3) so that it can be rotated integrally only in the vertical direction of feeding the seedlings, and is biased in the opposite direction by returning to the standby position by the spring (29). and moves laterally with a constant stroke, and at the left and right stroke ends, a pair of drive arms (30), (30) that abut and interlock with the operation arm (26) are swung integrally on the rotation support shaft (24). It should be fixed as much as possible. Further, this drive arm (30) is configured to be driven and operated in a state in which it contacts and interlocks with the operation arm (26) over the entire operating range.

With this configuration, the contact swing drive during vertical feed drive can be performed smoothly and with suppressed noise, and the drive speed of the drive arm (30) is approximately sinusoidal. Therefore, the operation arm (26
), the driving speed at the start of contact is relatively slow, the contact impact is small, and the durability is improved.

On the other hand, a reciprocating spiral groove (16) is formed on the outer circumference of the helical shaft (13) on the outer side of the transmission case (2), and
A top receiving member (18) having a top member (17) that engages with this spiral groove (16) is fitted on the outside, and this top receiving member (18) is attached to a fixed bracket (20) on the seedling stand (3). )
It is connected to. The seedling stand (3) is configured to be moved laterally and reciprocally as the screw shaft (13) is rotated. The frame receiving member (18) is attached to the transmission case (2).
The top member (17) is fitted into an insertion hole (21) formed in the top receiving member (18) along the radial direction of the screw shaft (13). In addition, the insertion hole (21
) The cover body (31) is bolted to prevent dust from entering.

Next, the operation structure of the transmission mechanism (A) will be explained. As shown in FIGS. 2 and 3, an elastic check mechanism is interposed between the operating lever (32) and the shift fork (33). In other words, the operating lever (32) and the fork shaft (3
4) and a restraining member (35) for restraining the sliding movement of the fork shaft (34).
A timing cam (6) is provided to be swingable around the horizontal axis (P), and this check member (36) is provided on the screw shaft (13) side.
37), it is configured to switch between a restraining posture and a restraining release posture. Also, a regulating member (38) that can freely slide the restraining member (36) between a state in which contact is restricted and a state in which the contact is released in either of the two postures.
is provided on the operating shaft (39) as an operating tool for switching operation. This operation shaft (39) is spring-biased to the abutment regulating position and is caused to protrude outward from the case.
1) A contact portion (31
In step a), the operating shaft (39) is brought into contact with the seedling stand (3) at the end of its movement stroke to permit the shift operation of the shift fork (33).

In this way, the cross-feed drive structure of the seedling stand (3) has been rationally improved, and the cover body (31) for supporting the frame member (17) that requires maintenance such as repair or replacement in a dust-proof state can be effectively used. By using this method, there is no need for a dedicated operating mechanism for changing the amount of seedlings taken.

Incidentally, although reference numerals are written in the claims section to facilitate comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the seedling planting device according to the present invention, FIG. 1 is a cutaway rear view showing the transmission system, FIG. 2 is a cutaway rear view of the switching operation mechanism, and FIG. 3 is a cutout side view of the switching operation mechanism. FIG. 4 is a cutaway plan view, and FIG. 5 is a side view. (2)... Planted transmission case, (3)...
・Seedling stand, (5)... Planting claw, (13)...
...Spiral shaft, (16) ...Spiral groove, (17)
......Block member, (18)...Block receiving member, (21)...Insertion hole, (31)...
... Lid body, (31a) ... Contact part, (39).
・・・・Operation tool.

Claims (1)

[Claims] A spiral groove (16) is formed on the outer periphery, and the planted transmission case (2
), the screw shaft (13) is arranged so as to protrude outward from the screw shaft (13).
A top receiving member (18) having a top member (17) therein which engages with the spiral groove (16) is fitted onto the outside, and this top receiving member (18) is interlocked and connected to the seedling stand (3) so that the threaded Axis (1
The seedling stand (3) is configured to move horizontally in a reciprocating manner in accordance with the rotational drive of step 3), and the number of times the planting claw (5) picks up seedlings relative to the movement stroke of the seedling stand (3) can be freely changed. A seedling removal amount switching mechanism (A) is provided, the top receiving member (18) is disposed on the outer side of the planting transmission case (2), and the top member (17) is connected to the top receiving member (18).
The seedling removal amount switching mechanism (A
) on the seedling stand (3).
The contact part (31
A) is a seedling planting device provided in the lid (31).