JPS6314581Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a planting device in a rice transplanter that plants four or more rows.

Fig. 3 shows a typical configuration of a planting device in a conventional four-row rice transplanter, which consists of planting mechanisms 10', 10' near the center in the left-right direction and planting mechanisms 10', 10' on the outside in the left-right direction. A pair of left and right planting transmission cases 8', 8' are provided between them, and each planting mechanism 10' is driven by a crank with a crank shaft 9', 9' supported by each case 8', 8'. Both planting transmission cases 8', 8' are connected by a transmission case 8'', and both ends of a screw shaft 13' for reciprocating the seedling stand 5 are supported in this transmission case 8''. Planted transmission case 8',
Not only is a two-system transmission structure to the crankshafts 9' and 9' of the screw shaft 13' required, but also two transmission structures are required, including both ends of the screw shaft 13', its drive mechanism, and a moving member that can be moved left and right by the screw shaft 13'. 5' must be supported by the transmission case 8'', which complicates the transmission structure, increases the number of parts, and increases weight, forcing the transmission cases 8', 8', and 8'' to be larger. Nakatsuta. For this reason, even though the operator of the rice transplanter wants to constantly monitor the condition of the seedlings immediately after planting and perform good and efficient planting work, the large planting transmission case obstructs the operator's field of vision, making it difficult to fully grasp the situation. This caused problems with the planting work.

In view of the above-mentioned circumstances, the present invention has been devised to simplify the transmission structure by devising the structure of the crankshaft that drives the planting mechanism and the arrangement of the screw shaft that reciprocates the seedling stand, thereby creating a planting transmission case. The purpose is to miniaturize the entire planting device including the rice transplanter so that the operator of the rice transplanter can easily monitor the status of seedlings immediately after planting.

The characteristic structure of the present invention, which was taken to achieve the above object, is that a driving sprocket, a transmission sprocket, and a transmission chain suspended between the two sprockets are installed on the left and right sides of a planting case, respectively. In addition to arranging a plurality of planting mechanisms, a support frame for supporting the swing link of each planting mechanism is extended outward on both left and right sides of the planting transmission case, and both ends thereof are connected to the planting claws. The support frame is bent to the side so as to surround the entire planting mechanism, and further, each of the extending ends of a crank arm for driving the planting mechanism, which extends from each end of the drive shaft of the drive sprocket, is connected to the support frame. A screw shaft, which is pivotally supported at both end portions and whose both ends are interlocked and connected to a seedling stand, is pivotally supported in the planting transmission case, and is driven by engaging with the transmission chain inside the planting transmission case. The drive shaft is screwed onto the screw shaft to reciprocate the seedling stand in the left-right direction with respect to the transmission case, and this structure provides the following effects.

In other words, according to the present invention, since there is only one transmission case in the center, it is only necessary to install one transmission system to the crank arm installed in this case. Since the swing link is attached to the shaft, the support frame can also be used as a protective frame for the planting mechanism, and the transmission structure for the planting mechanism is simpler than before, and both ends of the screw shaft are linked to the seedling stand. Since the screw shaft is connected and driven back and forth from side to side, there is no need to support both ends of the screw shaft in the transmission case as in the conventional example, and the drive structure of the seedling stand is simplified. The entire planting device, including the planting transmission case, can be downsized, the operator's field of view to the seedling planting area is expanded, and the status of the seedlings can be easily monitored at all times immediately after planting. Hereinafter, an embodiment of the present invention will be described based on the drawings. Fig. 1 shows a riding rice transplanter for planting 4 rows, and Fig. 2 shows the main structure thereof.

The riding rice transplanter includes a pair of left and right running drive wheels 1, 1 that can move on a tiller a, a driver's seat 2, and a driving unit 1.
A pair of left and right wheels are attached to the front part of the traveling machine body 3 equipped with the wheels 1 and 1, which cooperate with the wheels 1 and 1 pair to support the machine body on the ground by being in contact with the mud surface 6, and also to level the mud surface where planting is planned. A four-row planting device 6 equipped with floats 4, 4 is attached to the vertical axis X passing through the center of the width of the machine.
It is pivotally connected so that it can be swung from side to side.

The planting device 6 is attached to the upper part of a narrow planting transmission case 8 which is pivoted to the front part of the main body 3 with its rear end at the center position of the width of the fuselage and has a longitudinal attitude. At the same time, a seedling stand 5 with a rearward tilting position that can be moved back and forth is installed.
A seedling resting table lateral movement drive mechanism is provided, and the seedling resting table 5 is provided with a lateral movement drive mechanism at a position in front of the lower end of the seedling resting table 5, between the seedling take-out port 12 from the lower end of the seedling resting table 5 and the soil leveling surface. A planting mechanism 10 is provided for taking out and planting the placed seedlings in units of planting units by cyclically operating the planting claws 10a in conjunction with the movement.

The seedling tray lateral movement drive mechanism is a seedling tray 5
A helical shaft 13 having a reciprocating helical groove in a lateral direction is fixed to the screw shaft 13, and an internally threaded drive shaft 14 which is screwed onto the screw shaft 13 is attached to the transmission case 8 so as to be rotatable only. 14, the screw shaft 13, that is, the seedling stand 5, is moved back and forth.

The planting mechanism 10 has a planting claw 10a at the tip.
It is configured by providing a crank arm 10A that rotates and drives the planting arm 10b to which the planting arm 10b is attached, and a swing link 10B that regulates the attitude of the rotating planting arm 10b.

Therefore, the front end portion 8A of the planted transmission case 8
A single crank drive shaft 9 is made to protrude to the left and right sides from the front end portion 8A of the protruding case, and each planting mechanism 10 of this drive shaft 9 has the above-mentioned crank at a corresponding position. Arm 10
A... and protrudes from the front end of the machine 3 in a state positioned on the vertical axis
A transmission sprocket 19a is fixed to the transmission vertical shaft 17 which is interlocked through six pairs of bevel gears 18, and an input shaft 7 in a horizontal position which is interlocked through 18 pairs, and is pivotally supported at the rear end of the transmission case 8. A single transmission chain 19 is suspended between the transmission sprocket 19a and the drive sprocket 19b fixed to the seedling tray lateral movement drive shaft 14 and the planting mechanism drive shaft 9, and the seedling tray 5 and Planting mechanism 10
... are configured to be driven in conjunction with each other. Further, a support frame 22 is fixedly extended to the left and right sides of the front end of the transmission case 8, and a swing link 10 is attached to this frame 22.
B... is provided with the mounting part 20..., and both end portions of the frame 22 are bent backward to support the crank arm 10A...
21 is provided.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the planting device of the rice transplanter according to the present invention, in which Fig. 1 is a side view of the entire rice transplanter, Fig. 2 is a schematic plan view of the main parts, and Fig. 3 is a schematic plan view showing the conventional mechanism. It is. 5... Seedling stand, 8... Planting transmission case, 1
0... Planting mechanism, 10a... Planting claw, 10b
...planting arm, 10A...crank arm,
10B... Swing link, 13... Spiral shaft, 14...
Drive shaft, 19...Transmission chain, 19a...Transmission sprocket, 19b...Drive sprocket, 2
2...Support frame.

Claims (1)

[Scope of utility model registration request] A plurality of planting mechanisms 10 are disposed on both left and right sides of a planting transmission case 8 that houses a drive sprocket 19b, a transmission sprocket 19a, and a transmission chain 19 suspended between the sprockets 19a and 19b. , a support frame 22 for supporting the swing link 10B of each planting mechanism 10 is extended outward on both left and right sides of the planting transmission case 8, and both end portions thereof are bent toward the side where the planting claw 10a is present. Planting mechanism 1
0, and furthermore, each of the extending ends of crank arms 10A, 10A for driving the planting mechanism 10, which are extended from both ends of the drive shaft 9 of the drive sprocket 19b, is attached to the support frame. A screw shaft 13, which is pivotally supported at both ends of the plant 22 and whose both ends are interlocked and connected to the seedling stand 5, is pivotally supported in the planting transmission case 8, and is connected to the transmission chain 19 inside the planting transmission case 8. A planting device for a rice transplanter, in which a drive shaft 14 that is driven in an engaged manner is screwed into the screw shaft 13 to reciprocate the seedling stand 5 in the left-right direction with respect to the transmission case 8.