JPH052034Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention connects a seedling stand via a mounting arm to both ends of a transverse feed shaft that is reciprocated from side to side with a constant stroke. Relating to a seedling planting device in which the amount of seedlings removed is adjusted by configuring a seedling stand to be movable in and out of the operating locus of a planting claw that circulates between a take-out port and a planting surface. .

[Prior Art] In the above-mentioned seedling planting device, when connecting the seedling stand and the horizontal feed shaft, the conventional structure is such that the mounting arm extends from the seedling stand and the attachment arm is attached to the middle part in the longitudinal direction. In some cases, a long hole is formed along the longitudinal direction of the shaft, and a mounting arm is attached to the shaft end of the transverse feed shaft through this long hole.

Thereby, when the seedling stand is adjusted and moved to adjust the amount of seedlings taken, the above-mentioned elongated hole allows relative movement of the mounting arm with respect to the horizontal feed shaft. (For example, the applicant's actual application filed in 1983-
(See Figure 3 of issue 194004).

[Problem that the invention attempts to solve]

In the conventional structure described above, it is generally considered that the connection structure between the mounting arm and the horizontal feed shaft at the elongated hole is made simple to the extent that the mounting arm does not come out from the end of the horizontal feed shaft. Compared to a device that is rigidly connected with a nut or the like, the operation for adjusting the amount of seedlings removed is simplified by eliminating the labor of loosening and tightening the nut each time the amount of seedlings removed is adjusted.

However, since the seedling stand is configured to be moved laterally via the pair of left and right mounting arms, looseness is likely to occur in the elongated hole portion.

Then, as shown in Fig. 5A, the mounting arm 1
The length of the mounting arm 13 is longer than that of the seedling rack 6 and the horizontal feed shaft 12, so each time the seedling rack 6 is moved laterally, the mounting arm 13 is As the seedling platform 6 bends in the direction of movement, the startup of the seedling platform 6 tends to be delayed with respect to the horizontal feed shaft 12, and synchronization with the seedling planting claws is disrupted, making it impossible to obtain a predetermined seedling width. There is a possibility that he said.

In addition, the mechanism for feeding the seedling rest 6 lacked rigidity, and there was a risk that smooth lateral movement of the seedling rest 6 would be impaired due to changes over time.

The purpose of this invention is to prevent the delay in starting up the seedling stand due to horizontal feeding by making simple modifications.
The purpose is to improve the support rigidity of the seedling stand.

[Means for solving problems]

The feature of the present invention is that the seedling planting device as described above is configured as follows.

A mounting arm is rigidly connected to both ends of the transverse feed shaft, and a swing arm is pivotally connected to the tip of the mounting arm so that it can swing freely around a fulcrum axis parallel to the axis of the transverse feed shaft. The arm and the seedling rest are pivotally connected via a flexible part that absorbs the difference in movement trajectory between the swinging arm and the seedling rest.

[Effect]

() When configured as in the present invention, the left and right mounting arms 13 are attached to the horizontal feed shaft 12, as shown in FIG.
Since they are rigidly connected, the mounting arm 13 will not be displaced from side to side with respect to the transverse feed shaft 12.

Then, the swing arm 1 is attached to the tip of the mounting arm 13.
9 are pivotally connected so that they can swing freely, and the swing arm 19 and the seedling stand 6 are connected via a flexible part, so if there is something that shakes and displaces, it is the swing arm It is 19.

Therefore, as shown in FIG.
Even if the swing arm 9 shakes and moves left and right, the length of the swing arm 19 is sufficiently shorter than the mounting arm 13, so as shown in FIG. Compared to the structure, the fifth
The present invention in which the short swinging arm 19 is displaced from side to side as shown in FIG.

() When configured as in the present invention, for example, as shown in FIG.
3 can be considered as a rigid body, and only the small swinging arm 19 is at risk of displacement.

Therefore, compared to the conventional structure in which the long mounting arm 13 is displaced, the seedling stand 6 can be supported with sufficient rigidity.

[Effect of idea]

As described above, it is now possible to reduce the lateral displacement of the seedling rack with respect to the horizontal feed shaft, thereby suppressing the delay in starting the seedling rack with respect to the activation of the horizontal feed shaft. By always setting the desired value, it is now possible to stably plant seedlings.

In addition, the seedling stand can now be supported with sufficient rigidity, and the seedling stand can now be moved laterally smoothly without wobbling.

〔Example〕

FIG. 6 shows a riding rice transplanter equipped with the seedling planting device A of the present invention. This riding type rice transplanter has a body 1 equipped with an engine 10 and a transmission case 11 at the front, a driving section 9 at the middle, a seedling stand 6, a planting case 5, a seedling planting mechanism 7, and a grounding float 8. Seedling planting device A equipped with the seedling planting device A and seedling planting device A for the aircraft 1.
It is composed of a hydraulic cylinder 2 and an elevating link mechanism 3, which are connected to each other so that they can be driven up and down.

Next, the structure of the left and right reciprocating drive of the seedling stand 6 will be explained.

As shown in FIG. 3, a transverse feed shaft 12 having an endless spiral groove is pivoted to the planting case 5, and this transverse feed shaft 12 is connected to the engine 10.
It is configured to be able to be driven to reciprocate horizontally in the axial direction of the horizontal feed shaft 12 with a constant stroke by using the power from the horizontal feed shaft 12 . A pair of mounting arms 13 are rigidly connected to both ends of the transverse feed shaft 12 located outside the planting case 5 so as not to be relatively rotatable, and by bolts 14 . The upper and lower ends of both mounting arms 13 are connected and fixed by first and second connecting rods 4 and 15.
As a result, the lateral feed shaft 12, the pair of mounting arms 1
3. The first and second connecting rods 4, 15, etc. constitute a rigid structure.

A pair of left and right mounting brackets 16 are provided on the back of the seedling stand 6, and a third mounting bracket 16 is provided between the mounting brackets 16.
Build the connecting rod 17 and connect the third connecting rod 17.
By adjusting the nut 18, the third connecting rod 17 can be moved in the direction of its own axis, and the relative position of the seedling stand 6 with respect to the mounting bracket 16 can be changed. Thereby, the planting claws 21 of the seedling planting mechanism 7 and the starting point for taking out the pine seedlings W on the seedling platform 6 are aligned.

As shown in FIGS. 2 and 3, a pair of left and right swinging arms 19 are pivoted between the third connecting rod 17 and the second connecting rod 15 to interlock the mounting arm 13 with the seedling stand 6. It is connected. Then, the swinging arm 19 is swung around the axial center of the second connecting rod 15 as the fulcrum axis X which is parallel to the axial center of the transverse feed shaft 12, and the third connecting rod 17 is moved. , a connecting mechanism 20 is configured that allows relative movement between the mounting arm 13 and the seedling stand 6. The left and right swing arms 19 are positioned in contact with a spacer 22 that is fitted onto the third connecting rod 17.

Next, the vertical feeding mechanism 24 for sending out the pine seedlings W toward the seedling take-out port 23 will be explained.

As shown in FIGS. 1, 3, and 4, a hexagonal rotating shaft 25 is pivotally supported on the back side of the seedling tray 6, and a feed wheel 26 whose teeth are exposed on the seedling loading surface a is mounted. For each strip, a plurality of strips are attached to the rotating shaft 25 so as to be rotatable together. A one-way clutch 27 is provided for the rotating shaft 25, and a return spring 28 is provided for returning the one-way clutch 27 to its original state.

An operating shaft 29 is pivotally supported between the mounting frames 13, and a driving arm 30 provided at one end of the operating shaft 29 and a connecting portion 27a that can be integrally operated with the one-way clutch 27 are connected to a fourth A connecting rod 31 is installed. Transmission arms 32 are arranged side by side on the operation shaft 29 so as to be integrally rotatable with an interval corresponding to the lateral movement stroke of the seedling stand 6.
The planting case 5 is provided with a pair of drive arms 33 on the left and right that rotate at all times.

As a result, at the end of the stroke of the lateral movement of the seedling stand 6, one of the drive arms 33 is connected to the transmission arm 3.
transmission arm 32 by a predetermined amount of rotation.
is rotated to rotate the feed wheel 26. Therefore, the pine seedlings W are fed out by a predetermined amount toward the seedling take-out port 23, while the transmission arm 3
2 is returned to its original position by the one-way clutch 27 and return spring 28.

Next, a structure for adjusting the amount of seedlings taken will be explained.

As shown in FIGS. 1 and 2, a guide rod 35 is installed to protrude downward from a sliding rail 34 that supports the lower end surface of the seedling rack 6 and guides the lateral movement of the seedling rack 6. , supported by the planting transmission case 39,
With this guide rod 35, the seedling resting table 6 is configured to be movable in a direction substantially along the seedling resting surface a.

A linkage arm 36 that drives the guide rod 35 to move is pivotably supported, and this linkage arm 36 is linked via a linkage mechanism 37 to a seedling removal amount adjustment lever 38 that is pivotally supported on a planting transmission case 39. ing.
This seedling removal amount adjustment lever 38 is connected to the guide plate 4.
The position is regulated by a locking part (not shown) of 0, and the movement of the seedling tray 6 in the direction along the seedling loading surface a is regulated. The platform 6 can be moved. Therefore, the seedling stand 6
can be moved in and out, and the amount of seedlings taken can be adjusted.

In adjusting the amount of seedlings taken as described above, since the swing arm 19 rotates around the fulcrum axis X, the mounting arm 13 itself does not move in conjunction with the movement of the seedling stand 6 to adjust the amount of seedlings taken. Further, as shown in FIG. 3, the swing arm 19 has a connecting portion with the third connecting rod 17.
Long hole 19a along the longitudinal direction of swing arm 19
(corresponding to a flexible part) is bored to create a structure that does not hinder the swinging of the swinging arm 19. Since the fulcrum axis X of the swinging arm 19 is parallel to the axis of the transverse feed shaft 12, lateral deflection of the swinging arm 19 when the seedling stand 6 is moved laterally is suppressed.

[Another example]

The seedling planting device A of the present invention may be applied not only to a riding type rice transplanter but also to a walking type rice transplanter.

[Brief explanation of drawings]

The drawings show an embodiment of the seedling planting device according to the present invention; FIG. 1 is an enlarged side view of the seedling planting device, FIG. 2 is a side view showing a structure for adjusting the amount of seedlings taken, and FIG. 3 is a seedling stand. Fig. 4 is a side view showing the positional relationship between the drive arm and transmission arm for vertically feeding pine seedlings, and Fig. 5 A and B show the mounting arm and seedling stand, respectively. FIG. 6 is a schematic plan view showing the mounting state of the rice transplanter, in which A is a conventional structure, B is a structure according to the present invention, and FIG. 6 is an overall side view of the riding-type rice transplanter. 6...Seedling stand, 12...Horizontal feed shaft, 13...
Mounting arm, 19... Swinging arm, 19a... Flexibility part, 21... Planting claw, 23... Seedling take-out port, X
...Fully axis center, G...Planting surface, b...Operation locus.

Claims (1)

[Scope of utility model registration request] The seedling stand 6 is connected via attachment arms 13, 13 to both ends of the horizontal feed shaft 12, which is reciprocated from side to side with a constant stroke, and between the seedling take-out port 23 of the seedling stand 6 and the planting surface G. In the seedling planting device, the seedling platform 6 is configured to be movable in and out with respect to the operation locus b of the planting claw 21 which operates in a cyclical manner to adjust the amount of seedlings taken. The mounting arms 13, 13 are rigidly connected to both ends of the mounting arms 13, 13, and a fulcrum axis
Swinging arms 19, 19 are pivotally connected to each other so as to be able to swing freely, and the swinging arms 19, 19 and the seedling stand 6 are connected to each other, and the swinging arms 19, 19 and the seedling stand 6 are
The seedling planting device is pivotally connected via a flexible portion 19a that absorbs the difference in the movement trajectory of the seedling planting device.