JP2001258342A - Seedling planting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling planting device capable of achieving a lighter weight while simplifying a transmission structure to a planting mechanism in the seedling planting device. SOLUTION: This seedling planting device is obtained by attaching a single planting transmission case 17 to the rear end face of a feed case 12 for receiving the power transmission from an engine of a traveling machine body, freely drivably supporting a first planting mechanism B at the rear of the planting transmission case 17, adjacently arranging a second planting mechanism B and connecting the first planting mechanism B to the second planting mechanism B with a first and a second supporting shafts so as to synchronously drive both the planting mechanisms B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting apparatus provided with the same number of planting mechanisms for planting a plurality of rows.

[0002]

2. Description of the Related Art When a plurality of planting mechanisms are provided for a planting transmission case, planting mechanisms are provided on the left and right side surfaces at the rear of the planting transmission case. Therefore, for example, to provide four planting mechanisms, it was necessary to provide two planting transmission cases (see, for example, Japanese Patent Application Laid-Open No.
318132).

[0003]

The planting transmission case is a case that is long in the front-rear direction of the body, and is provided with a transmission mechanism to the planting mechanism in the case. The transmission case also contributes to the increase in the weight of the planting device. Further, if the planting transmission case is arranged in parallel in the front-rear direction of the machine body, a laterally-transverse transmission case is also required over the left and right planting transmission cases, and the transmission structure becomes more complicated and heavy.

An object of the present invention is to provide a light and simplified seedling planting apparatus having three or more planting mechanisms.

[0005]

According to a first aspect of the present invention, a single planting transmission case equipped with a plurality of planting mechanisms on the left and right sides is connected to a feed case for receiving planting power. In addition to fixing, there is a point that a plurality of planting mechanisms equipped on each side are connected by a connecting mechanism,
The operation and effect are as follows.

(Operation and Effect) In other words, in consideration of the fact that only one planting mechanism is provided on one side of the planting transmission case, a plurality of planting mechanisms are provided. Since the planting mechanism arranged on the side is merely connected by the connecting mechanism, only a single planting transmission case is required, and the weight and structure of the seedling planting apparatus can be reduced.

(Structure) According to a second aspect of the present invention, a single planting transmission case equipped with a plurality of planting mechanisms on each of the left and right sides is set at a rearward posture of the body at a rear portion of a feed case for receiving planting power. The connection and fixing are performed in this state, and a plurality of planting mechanisms provided on the respective side surfaces are connected by the connection mechanism. The operation and effect are as follows.

(Effects) Since the planting transmission case in the front-rear position, which causes an increase in weight before and after the seedling planting device, can be reduced, it is possible to suppress an increase in the weight of the rear part of the body as a rice transplanter. it can.

(Structure) According to a third aspect of the present invention, a lateral transmission shaft is rotatably supported by a pair of left and right bearings at a rear portion of a planting transmission case connected to a feed case for receiving planting power, and the planting is performed. A planting mechanism is attached to both ends of the lateral transmission shaft protruding from the side surface of the transmission case, and the planting mechanism is attached to the lateral transmission shaft and rotates integrally with the rotating drive arm and the planting transmission case. A rocking arm attached thereto, and a planting arm provided with a planting claw that is mounted over the rotary drive arm and the rocking arm and performs a crank motion, wherein the planting arm is planted. The distal end portion having a hook and a proximal end portion connected to the rotary drive arm are formed in a bent shape that is eccentric to each other, and the left and right planting arms arranged with the planting transmission case therebetween, Destination The point is that the gap between the ends is smaller than the gap between the base ends, and the operation and effect are as follows.

(Function and Effect) The planting arm itself is bent so as to be eccentric between the distal end and the proximal end. The mounting form of this planting arm is described in the above-mentioned publication (Japanese Unexamined Patent Publication No.
No. 18132), usually,
An attachment method is adopted in which the distance between the distal ends of the left and right planting arms is wide and the distance between the proximal ends is narrow. On the other hand, the interval between the planting claws cannot be changed because it is determined by the size between the plants. Here, paying attention to the point where the planting arms are bent, as shown in FIG. 5, an arrangement is adopted in which the planting arms face each other so that the interval between the distal ends of the left and right planting arms becomes narrow. Thereby, the interval between the base ends can be wider than the interval between the planting claws. Then, the distance between the bearings for supporting the lateral transmission shaft can be increased by an amount corresponding to the increase in the distance between the base ends. By adopting such a configuration, the support of the lateral transmission shaft is stabilized, and a plurality of planting mechanisms are arranged on one side of the planting transmission case to support the planting mechanisms with a single planting transmission case. In spite of the structure that must be done,
It is possible to avoid the support structure of the planting mechanism from becoming too large.

(Structure) According to a fourth aspect of the present invention, the first planting mechanism is supported by the planting transmission case receiving the planting power so as to be able to be planted, and the planting is sandwiched between the first planting mechanism. A second planting mechanism is arranged on the side opposite to the side where the power transmission case exists, and the first planting mechanism and the second planting mechanism are linked via a connecting frame so as to operate synchronously. The effects are as follows.

(Function and Effect) In other words, what is driven is the first planting mechanism supported by the planting transmission case, and the first planting mechanism attached to the planting transmission case is connected via the connecting frame. Since the second planting mechanism is attached to the
This eliminates the need for a drive mechanism for the planting mechanism and a transmission case for accommodating the drive mechanism, thereby achieving simplification of the structure.

(Structure) According to a fifth aspect of the present invention, there is provided a first planting arm provided in the first planting mechanism and a second planting arm provided in the second planting mechanism adjacent to the first arm. In the above, the distal end portion having the planting claw is eccentric with respect to the proximal end portion connected to the rotation drive arm, and the interval between the distal end portions is arranged to be larger than the interval between the proximal end portions. The point is that a connection frame for synchronizing the first planting mechanism and the second planting mechanism is stretched over the base ends, and the operation and effect are as follows.

(Effects) In other words, as described in the fourth aspect of the invention, since the first planting mechanism and the second planting mechanism are arranged side by side and integrated by the connecting frame, the connecting frame is substantially formed. Is in a cantilevered state. On the other hand, the interval between the planting claws is constant, and this point cannot be changed. Therefore, the bending state of the planting arm is considered so that the distal ends of the planting arms are separated from each other. By arranging, the first planting mechanism and the second planting mechanism can be arranged so that the distance between the base ends of the planting arms is smaller than the distance between the planting claws. As a result, the span to be borne by the connecting frame can be reduced, and the load on the connecting frame can be reduced by that small amount.

(Constitution) The invention according to claim 6 resides in that the planting transmission case is formed by molding a pipe material.
The operation and effect are as follows.

(Effects) In other words, since a molding method by die molding is employed, the number of manufacturing steps can be reduced, and
Since processing distortion can be suppressed, simple finishing processing is sufficient even when a functional component such as a bearing is placed in the case. Further, since the material to be used is a pipe material, the processing to be added to the pipe material only needs to be a finishing process or the like, and the production can be easily performed.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, 1 is a traveling body, 2 is a steering wheel, 3 is a driving wheel, 4 is a steering section, 5 is an engine, 6 is a belt transmission mechanism, 7 is a transmission case,
8 is a rear axle case, A is a seedling planting device, 10 is an elevating link mechanism, 11 is a seedling rest, 12 is a feed case to which the power of the PTO transmission shaft 9 is input, B is a crank type planting mechanism, A leveling float 16 constitutes a riding rice transplanter.

The seedling planting apparatus A will be described. As shown in FIGS. 3 and 4, the feed case 12 has a vertical feed shaft 2 provided with left and right swing type drive arms 27 a for driving a vertical feed mechanism 25 provided in the seedling rest 11.
7 and a helical shaft 22 for reciprocating and laterally driving the seedling rest 11 in the left-right direction with respect to the traveling machine body 1.
In the drawing, reference numeral 18 denotes an inter-stock transmission that changes the power to the helical shaft 22 for lateral feed, and reference numeral 32 denotes a planting clutch that cuts off power transmission to the planting mechanism B.

As shown in FIG. 4, a transmission shaft 13 is rotatably supported in the feed case 12 in parallel with the longitudinal feed shaft 27, and an input bevel gear receiving the power transmission from the PTO transmission shaft 9 on the transmission shaft 13. The clutch sleeve 15 is fixed to the key 13A so as to be freely fitted and slidable, and the input bevel gear 14 and the clutch sleeve 15 form an engaging type planting clutch 32. Input bevel gear 1
An output bevel gear 19 is provided on the transmission shaft 13 so as to be integrally rotatable with the transmission shaft 4, and power is supplied from the output bevel gear 19 to the planting mechanism B.

As shown in FIG. 2, a mat-shaped seedling on the seedling rest 11 is cut off on a sliding plate 24 for guiding the mat-shaped seedling on the laterally moving seedling rest under the seedling rest 11. In order to plant the seedlings on the field surface, an extraction opening for guiding the circulating operation of the planting claw 38A that holds the seedlings and circulates in the vertical direction and a seedling guide 28 are provided.

A planting transmission case 1 provided with a planting mechanism B
7 will be described. As shown in FIGS. 2 and 3, the planting transmission case 17 extends rearward from the feed case 12 to the rear of the machine body. A total of four planting mechanisms are provided on each side surface of the rear end, each having two sections. Equipped with B. The planting transmission case 17 includes a front-to-back transmission case portion 17A extending rearward from the feed case 12 and a lateral transmission case provided at the rear end of the front-to-back transmission case portion 17A so that the axis is orthogonal to the transmission case. The main body 17a formed integrally with the front-rear transmission case 17A and the extension 17b welded to the main body 17a are butt-welded and integrated. Have been.

As shown in FIGS. 2 and 3, the main body 1 of the front-rear transmission case 17A and the horizontal transmission case 17B is provided.
Reference numeral 7a denotes an integrally molded body formed by subjecting a pipe to bulge processing, and the front end of the front-rear transmission case 17A is fixed to the feed case 12 by welding. Inside the front-rear transmission case 17A, a cylindrical front-rear transmission shaft 33 is provided along the axial direction of the case 17A, and at the front end and the rear end of the front-rear transmission case 17A, The bush 34, 34, respectively, and the bush 3
4, 34, both ends of the front-rear transmission shaft 33 are rotatably supported. It should be noted that a part of the front-rear transmission case 17A is processed so as to protrude inward, and the protrusion 1
The bushs 34, 34 are positioned by inserting the recessed portions of the bushes 34, 34 into 7c.

As shown in FIG. 5, the lateral transmission case 1
7B is similarly provided with a cylindrical lateral transmission shaft 31 along the case axis, and both ends of the lateral transmission shaft 31 are rotated by rolling bearings 30, 30 disposed inside both ends of the lateral transmission case portion 17B. It is freely supported. Seals 29, 29 are provided on the outer ends of the rolling bearings 30, 30, respectively. An output bevel gear 20 and an input bevel gear 21 are mounted at the rear end of the front-rear transmission shaft 33 and at an intermediate position between the horizontal transmission shafts 31 so that power can be transmitted by engaging the two bevels 20 and 21.

The configuration of the first planting mechanism B will be described.
As shown in FIG. 5, the rotation drive arms 35 are attached to both ends of the lateral transmission shaft 31 protruding from the lateral transmission case portion 17B, and a fixed frame 36 extends rearward from the lateral transmission case portion 17B. A swing arm 37 that swings forward and backward is attached to the fixed frame 36. A first planting arm 38 spans the tip of a rotary drive arm 35 disposed in front and rear and the tip of a swing arm 37 so as to perform a crank motion, and the rotary drive arm 35 that constantly rotates in a fixed direction. The first planting arm 38 is planted by the swinging movement of the swinging arm 36 in conjunction therewith, and the planting claw 38A attached to the tip of the first planting arm 38 is moved along the locus b as shown in FIG. The operation is performed so that the seedlings are cut off from the seedling rest 11 and planted on the field surface.

The first planting mechanisms B, B are arranged on both sides of the front-rearward transmission case portion 17A, respectively. Second
Planting mechanisms B, B are provided. As shown in FIG. 6, a first support shaft 23 is fixed to the tip of the rotation drive arm 35, and the first support shaft 23 passes through the first planting arm 38 near the rotation drive arm 35. It extends to the adjacent second planting arm 38 on the outside thereof, and the outer second
The planting arm 38 is supported so as to be relatively rotatable. The first and second planting arms 38 are attached to the first support shaft 23 via bearings 26 so as to be relatively rotatable.
A cam 23A is fixedly attached to the support shaft 23 inside the planting arm 38. Here, the first support shaft 23 and the second support shaft 40 are referred to as a connection frame that connects the first planting mechanism B and the second planting mechanism B, and a connection mechanism.

As shown in FIGS. 2, 5 and 6, a seedling pushing-out tool 39 for pushing out the seedling held by the planting claw 38A at the seedling-planting position is provided in the first and second planting arms 38 so as to be retractable. The cam 23A, which rotates relative to the planting operation of the first and second planting arms 38, drives the seedling pushing tool 39 in the pushing direction at the planting position. The seedling pushing tool 39 is urged by a spring 39A in a direction of retreating into the first and second planting arms 38. A second support shaft 40 extends from the end of the swing arm 37 in parallel with the first support shaft 23, and the ends of the first and second planting arms 38 also extend with respect to the second support shaft 40. It is supported so as to be relatively rotatable, and the second support shaft 40 also reaches and supports the second planting arm 38 of the neighboring planting mechanism B.

With the above configuration, the first and second planting mechanisms B for a total of four lines on the left and right sides are driven integrally. By the way, as shown in FIG. 5 and FIG.
The shape of the second planting arm 38 is eccentric in plan view between the distal end where the planting claw 38A is attached and the proximal end that is attached to the rotary drive arm 35. As shown in FIG. 5, the eccentric direction is set so that the inner two sets of planting claws 38A approach each other, and as shown in FIG. 6, the outer two sets of planting claws 38A are connected to each other. An eccentric direction is set in a direction away from each other. As a result, the distance between the base ends of the first planted arms 38 is increased inward for two rows, and the support distance between the left and right rolling bearings 30 supporting the lateral transmission shaft 31 can be increased. . On the other hand, the second planting arm 38 located on the outside and the first planting arm 38 adjoining on the inside are arranged such that their base ends are close to each other. The length of the two support shafts 40 can be shortened.

[Another Embodiment] The present invention can also be carried out in the following modes. In the above embodiment, the configuration applied to the crank type planting mechanism has been described. However, the configuration may be applied to a rotary type planting mechanism.
Further, in the planted transmission case 17, the lateral transmission case 1
7B is composed of two parts, but the extension parts 17b, 17b may be welded to both sides of the main body part 17a. Further, the lateral transmission case part 17B is composed of one part, and the lateral transmission case part 17B is formed. And the front and rear transmission case portion 17A may be connected by welding.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter.

FIG. 2 is a side view showing a feed case and a planting transmission case.

FIG. 3 is a plan view of the seedling planting apparatus.

FIG. 4 is a sectional view showing a transmission structure in a feed case.

FIG. 5 is a cross-sectional plan view showing a planting transmission case and a first planting mechanism.

FIG. 6 is a cross-sectional plan view showing a first planting mechanism and a second planting mechanism.

[Explanation of symbols]

 Reference Signs List 12 feed case 17 planted transmission case 23, 40 linkage mechanism (first support shaft, second support shaft) 30 bearing 31 lateral transmission shaft 35 rotation drive arm 37 swing arm 38 planted arm

Claims (6)

[Claims] 1. A feed case for receiving planting power,
A seedling planting device that connects and fixes a single planting transmission case equipped with multiple planting mechanisms on each of the left and right sides, and connects the multiple planting mechanisms equipped on each side with a connecting mechanism. . 2. A single planting transmission case equipped with a plurality of planting mechanisms on the left and right sides, respectively, is fixedly connected to a rear part of a feed case receiving planting power in a state where the machine body is set in a front-rear direction, and respectively. A seedling planting apparatus in which a plurality of planting mechanisms mounted on the side of the plant are connected by a connecting mechanism. 3. A horizontal transmission shaft is rotatably supported by a pair of left and right bearings at a rear portion of the planting transmission case connected to a feed case for receiving the planting power, and the lateral projection protrudes from a side surface of the planting transmission case. A rotation drive arm attached to the both ends of the transmission shaft and attached to the lateral transmission shaft and integrally rotating, and a swing arm attached to the plantation transmission case. The rotating drive arm and the swing arm are configured to include a planting arm having a planting claw that performs a crank motion by being mounted over the swinging arm, wherein the planting arm has a tip portion having a planting claw and the planting arm. The base end connected to the rotary drive arm is formed in a bent shape that is eccentric to each other, and the left and right planting arms arranged so as to sandwich the planting transmission case are arranged such that the distance between the distal ends is the base end. Between each other Seedling planting equipment attached to be smaller than the gap. 4. A planting power transmission case receiving a planting power is provided with a first
The planting mechanism is supported so that the planting can be driven, and the first
A second planting mechanism is arranged on the side opposite to the side where the planting transmission case is located with the planting mechanism interposed therebetween, and a connecting frame is provided for synchronizing the first planting mechanism and the second planting mechanism. Seedling plant that is linked through. 5. A first planting arm provided in the first planting mechanism and a second planting arm provided in the second planting mechanism adjacent to the first planting arm, each having a planting claw. Eccentrically with respect to the proximal end connected to the rotary drive arm, and the distance between the distal ends is arranged to be greater than the distance between the proximal ends, the first planting mechanism The seedling planting apparatus according to claim 4, wherein a connection frame for synchronously operating the second planting mechanism and the second planting mechanism is extended over the base ends. 6. The seedling planting apparatus according to claim 1, wherein the planting transmission case is formed by molding a pipe material.