JPS6331528Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention connects a seedling planting device equipped with a seedling stand to a link mechanism connected to a traveling machine so as to be able to move up and down, and also connects the link mechanism and the A fluid pressure cylinder with a damper that provides greater resistance to changes in relative posture with the seedling stand as the relative attitude change speed increases is supported at each end of the link mechanism and the seedling stand. Seedlings in a riding type rice transplanter, in which a ring-shaped member made of an elastic material and having a wider width toward the outer side in the radial direction is attached to the link mechanism and the seedling stand by being fitted around the horizontal axis of the support in an elastically deformed state. Regarding the planting device support structure, the purpose thereof is to facilitate the assembly work of a fluid pressure cylinder with a damper.

The above-mentioned seedling planting device support structure has a fluid pressure cylinder with a damper interposed between the link mechanism and the seedling pedestal, so that the lightweight seedling pedestal becomes a connecting part between the seedling planting device and the link mechanism. This is due to the fact that the seedling planting device is installed in a way that extends significantly upwards from the ground, making it difficult to raise and lower the seedling planting device with respect to the traveling body, and to raise and lower the seedling platform at the beginning and end of the rolling operation of the seedling planting device along the mud surface. This is to suppress sudden changes in posture and reduce the impact on the seedling stand, allowing the seedlings to be fed smoothly. It is necessary to support both ends of the damper-equipped fluid pressure cylinder with respect to the link mechanism and the seedling stand so as to allow a change in relative posture between the link mechanism and the seedling stand.

If the bearing is supported with play in order to allow this change in relative posture, the effect of installing a fluid pressure cylinder with a damper will be reduced.
The seedling rack also vibrates due to the operation of the planting claw which is rotated up and down, which causes the seedlings on the seedling rack to also vibrate, resulting in a hindrance to the seedling planting work.

In order to avoid such a situation, a ring-shaped member made of an elastic material is supported at both ends of the damper-equipped fluid pressure cylinder, and the width increases toward the outer side in the radial direction. It is fitted around the horizontal axis of the support in an elastically deformed state on the seedling stand, thereby suppressing the occurrence of the aforementioned vibration while allowing the relative posture of the link mechanism and the seedling stand to change in the vertical and horizontal directions. However, the structure for attaching this damper-equipped fluid pressure cylinder to the link mechanism or seedling stand had the following problem.

In other words, if the conventional structure is explained with reference to the link mechanism shown in FIG. 18
a', 18a' are penetratingly supported so as to be directly insertable and removable. In this case, the ring-shaped member 16' of the fluid pressure cylinder is attached to the left and right brackets 18a,
18a, and in this state, the horizontal shaft 17' is inserted into the left and right brackets 18a', 18a' and the ring-shaped member 16. The troublesome work of inserting the horizontal shaft 17' while elastically deforming it has to be done at the same time as the work of inserting the horizontal shaft 17' into the left and right brackets 18a', 18a', resulting in a problem of complicated assembly work. .

The present invention has been made with the above-mentioned circumstances in mind, and in the seedling planting device support structure of the rice transplanter having the above-mentioned structure, each of the above-mentioned horizontal shafts is constructed as a cylindrical shaft. The shaft is supported externally so as to be insertable and removable by a shaft member that is removably supported through a pair of left and right brackets provided on the link mechanism and a pair of left and right brackets provided on the seedling stand. .

That is, there are two steps: inserting the cylindrical horizontal shaft into the ring-shaped member while elastically deforming it, and assembling the cylindrical horizontal shaft inserted into the ring-shaped member to the left and right brackets using the shaft-like members. Since these steps can be performed separately, although the number of assembly steps is increased compared to the conventional structure described above, the overall assembly work can be performed easily and quickly. As a result, we have achieved a seedling planting device for a rice transplanter that solves the above-mentioned problems and is more convenient to use overall.

Embodiments of the present invention will be described below based on the drawings.

Figure 1 shows the side view of a riding rice transplanter, showing a pair of left and right front propulsion wheels 1, 1 that can be operated to change direction, a pair of left and right rear propulsion wheels 2, 2, an engine 3 for driving various devices, and a machine frame. At the rear of a passenger vehicle body 6, which is equipped with a transmission case 4, a driver's seat 5, etc., a pair of left and right lower swing links 7a, 7a that can swing vertically and a hydraulic cylinder 8 are used to drive and swing the vehicle up and down. Upper swing link 7b
A link mechanism 7 that can be operated to swing up and down is provided, and a pair of left and right swing links 9, 9 (see Fig. 2) installed at the rear end of the link mechanism 7 in an inverted trapezoidal shape are provided. A seedling planting device 10 is connected to the seedling planting device 10 in a rolling manner.

This seedling planting device 10 includes a slanted seedling platform 11 that is moved sideways and back at a constant stroke;
Five planting claws 12 are placed side by side at appropriate intervals in the horizontal direction, and three planting nails 12 are placed side by side at appropriate intervals in the horizontal direction, which are circulated up and down between the lower end of the seedling retrieval groove 1 and the field. - etc., and while taking out seedlings one by one along the lower end row of the seedling group placed on the seedling stand 11, the ground is leveled by the float group 13... The system is designed to plant five rows of seedlings in a field.

As the seedling planting device 10 progresses, the seedling planting device 10 is configured to sequentially plant five rows of seedlings, and the wheel group 1
The planting depth can be stabilized by adjusting the seedling planting device 10 up and down to a desired position with respect to the field according to fluctuations in the amount of sinking into the mud, and, The seedling planting device 10 is adapted to perform a rolling operation along the mud surface.

As shown in FIGS. 1 to 3, between the upper swinging link 7b of the link mechanism 7 and the seedling stand support frame 14 of the seedling planting device 10, there is a connection between the link mechanism 7 and the seedling stand. A damper-equipped hydraulic cylinder 15 is installed as a damper-equipped hydraulic cylinder that provides greater resistance to the relative attitude change with respect to the damper 11 as the relative attitude change speed increases. The mounting structure of the cylinder 15 will be described in detail based on FIGS. 3 and 4 A and B. A ring-shaped member made of an elastic material and having a wider width toward the outer side in the radial direction is supported at both ends of the cylinder. 16, 16 are the upper swing link 7b and the seedling stand support frame 14.
The cylindrical shafts 17, 17 of the support are fitted onto the outside in an elastically deformed state. In order to support both horizontal shafts 17, 17, each of these horizontal shafts 17, 17 is
The left and right brackets 18a, 18a provided on the upper swing link 7b and the seedling stand support frame 1
A pair of left and right brackets 18b, 18b provided at 4
The bolts 19a and 19b, which are shaft members that are inserted through and supported in a removable manner, are externally fitted and supported in a removable manner.

[Brief explanation of the drawing]

The drawings show an embodiment of the support structure for the seedling planting device in the riding rice transplanter according to the present invention, FIG. 1 is a side view of the riding rice transplanter, and FIG. 2 is a partially cutaway view of the support structure for the seedling planting device. 3 is a partially cutaway side view of the hydraulic cylinder mounting structure, FIGS. 4A and 4B are longitudinal sectional front views of the horizontal shaft support structure, and FIG. 5 is a longitudinal sectional front view of the conventional example. 6... Traveling body, 7... Link mechanism, 10...
Seedling planting device, 16, 16...Ring-shaped member, 1
7, 17...Horizontal axis, 18a, 18a...Bracket, 18b, 18b...Bracket, 19a, 1
9b...Shaft member.

Claims (1)

[Scope of utility model registration request] A seedling planting device 1 in which a seedling stand 11 is attached to a link mechanism 7 that is connected to a traveling body 6 so as to be able to move up and down.
A fluid pressure cylinder 15 with a damper is provided that connects the link mechanism 7 and the seedling stand 11 in a rolling manner and provides greater resistance to the change in the relative attitude of the link mechanism 7 and the seedling stand 11 as the relative attitude change speed increases. ,
A ring-shaped member 16, 16, which is made of an elastic material and has a wider width toward the outer side in the radial direction of the support, is attached to each end of the link mechanism 7 and the seedling stand 11. This is a support structure for a seedling planting device in a riding type rice transplanter, which is attached to a stand 11 by fitting horizontal shafts 17, 17 of the support in an elastically deformed state. These horizontal shafts 17, 17 are connected to a pair of left and right brackets 18a, 18 provided on the link mechanism 7.
a, and a pair of left and right brackets 18b, 18b provided on the seedling stand 11, and shaft members 19a, 19a, which are removably inserted and supported through the shaft members 19a, 19a, are externally supported in a removable manner. Seedling planting device support structure.