JPH0353621Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a seedling platform device in a walking type or riding type rice transplanter.

[Conventional technology]

In recent walking-type and riding-type rice transplanters, seedling mats are placed side-by-side on the surface of a seedling stand that is tilted so that the lower end is located in front of the moving machine, or conversely, the lower end is located in the rear. A seedling receiving frame with an L-shaped cross section is provided at the lower end of the seedling table, and the surface of this seedling receiving frame supports the lower edge of the seedling pine placed on the seedling table and allows the seedlings to fall. I try not to. Then, as the seedling platform is moved laterally in appropriate pitches, the seedling planting claws of the plurality of vertically swinging planting mechanisms in the seedling planting device are connected to the seedling take-out opening formed by cutting out the seedling receiving frame. It is configured to swing up and down in unison between the seedling tray and the field, and the seedlings are divided into individual plants from the seedling pine on the seedling platform using the seedling claws and then planted in the field. There is.

When this type of seedling platform is moved horizontally, the seedling platform moves horizontally relative to the seedling receiving frame.
The lower edge of the seedling pine on the seedling tray is pressed against the surface of the seedling receiving frame, causing lateral displacement, which may cause the lower edge of the seedling pine to collapse, and furthermore, there is a risk that not enough seedling pine can reach the seedling outlet. The number of seedlings per plant is uneven or missing.

As a prior art to eliminate such drawbacks, Japanese Utility Model Publication No. 48-19063 discloses a method that surrounds both the front and back sides of the seedling receiving frame, excluding the seedling outlet, at the lower end of the seedling tray. An endless body is wrapped around and disposed, one part of the endless body is connected to the vertical rib of the seedling platform, and the endless body is rotated as the seedling platform moves laterally, so that the working surface of the endless body is A device has been disclosed in which the lower edge of the seedling pine in contact with the (outer peripheral surface) is configured to move horizontally smoothly.

[Problem that the invention attempts to solve]

In this prior art, the endless body and the longitudinal rib are connected by a bolt passing through the endless body.

Therefore, the endless body to which the bolt is attached is fixed so that it cannot move at all in the longitudinal direction of the longitudinal rib. In such a configuration, the horizontal movement distance of the vertical rib is adjusted so that the connection point between the endless body and the vertical rib goes beyond the center of the left and right winding support parts of the endless body and reaches the outside of the winding support end. I can't make it longer.

In addition, in a structure in which the vertical length of the seedling pine is adjusted by adjusting the vertical position of the seedling receiving frame with respect to the lower end of the seedling platform, there is a vertical rib fixed to the seedling platform and an endless body surrounded by the seedling receiving frame. Since the distance between the seedlings can be changed by adjusting the vertical movement of the seedling receiving frame, it cannot be solved by adjusting the connecting bolts alone.

[Means for solving problems]

Therefore, in the present invention, a seedling receiving frame is provided facing the lower end of the seedling platform, which is provided with a vertically long rib that partitions the seedling mats so that they can be placed on the left and right side of the traveling machine in parallel.
In the seedling platform device arranged in the seedling receiving frame so as to surround the endless body except for the seedling take-out port, a movable rib is provided at the lower end opening of the vertically long rib so as to be slidable only in the longitudinal direction of the vertically long rib. The end portion of the movable rib is configured such that the endless body is engaged with the distal end portion of the movable rib approximately in the center of its left-right width dimension.

[Functions and effects of the invention]

According to this configuration, the movable rib attached to the lower end opening of the vertically long rib is slidably inserted between the surface of the seedling receiving frame and the vertically long rib, and the movable rib is attached to the surface of the seedling receiving frame. It will not fall off because it is supported by. In this state, since the endless body is engaged with the movable rib, by moving the seedling receiving frame up and down relative to the lower end of the seedling tray, the movable rib will automatically adjust the gap between the surface of the seedling receiving frame and the lower end of the vertical rib. It can be moved to fill the target area, and no large unreasonable force is applied to the engaging part.

In addition, the engagement portion between the endless body and the movable rib is located approximately in the center of the left-right width dimension of the movable rib, and
Since the movable rib can move closer to the surface side of the seedling receiving frame, the engaging portion can laterally move to the outer edge portion of the wrapping end guide body that supports the left and right ends of the endless body. In other words, the horizontal movement distance of the seedling stand is greater than the distance between the left and right winding support centers of the endless body, and in that case,
The endless body can be bent narrowly in the width direction of the movable rib relative to the engaging portion, and no unreasonable force is applied to the engaging portion with the endless body.

In addition, at the engagement part between the movable rib and the endless body,
If the endless body is elastically biased inward of the movable rib,
This has the effect that the unreasonable force can be released and damage to the endless body can be easily prevented.

〔Example〕

Below, we will explain the drawings of an embodiment in which the present invention is applied to a seedling stand in a riding rice transplanter.
In the figure, 1 indicates a traveling aircraft, and the traveling aircraft 1
consists of a body frame 2, a pair of left and right front wheels 3, 3 that support the front part of the body frame 2, and a pair of left and right rear wheels 4, 4 that support the rear part of the body frame 2. The upper surface is equipped with a control seat 5 and a steering handle 6, and the lower surface of the vehicle body frame 2 is equipped with a transmission case 7 for driving and changing gears.
The two rear wheels 4, 4 are attached to the rear wheels of chain cases 8, 8 extending rearward from both left and right sides of the transmission transmission case 7, and the engine mounted on the front upper surface of the vehicle body frame 2. 9 to both front wheels 3 via the traveling transmission transmission case 7.
, and is configured to drive both rear wheels 4 to travel, and at the rear of the traveling body 1 is a multi-row planting device (in this embodiment, an 8-row planting device) seedling planting device 10 connected to a parallel link mechanism. 11 so that it can be moved up and down.

The seedling planting device 10 includes a planting case 12, a planting mechanism 13 with vertically swinging seedling claws 14 attached to both left and right sides of the planting case 12, and a planting mechanism 13 attached to the lower surface of the planting case 12. The seedling planting unit 17 is composed of four seedling planting units 17 each consisting of a floating float 15 and a seedling stand 16 supported on the top surface of the planting case 12.

As is conventionally known, the seedling platform 16 in the seedling planting device 10 is configured to be reciprocated and laterally fed in a lateral direction perpendicular to the forward direction of the traveling body 1, and a seedling platform 16 is mounted on the upper surface of the platform. Seedling Matsuto placed 18
It is provided with vertical feeding mechanisms 19, 19 for vertically feeding the seedlings toward the lower end of the seedling table 16.

In the part facing the lower end of this seedling stand 16,
A seedling receiving frame 21 having an L-shaped cross section extending in the lateral direction of the seedling mounting table 16 is provided, and the seedling receiving frame 21 is supported so as to be vertically movable with respect to a bracket 48 protruding from the planting case 12. By adjusting the gap between the seedling receiving frame 21 and the lower end of the seedling mounting table 16 using an operating rod 49 disposed on the back side of the seedling mounting table 16, the amount of vertical picking of the seedling pine can be increased or decreased.

A seedling take-out port 22 is bored at a location corresponding to each of the planting mechanisms 13, through which the seedling claws 14 of the planting mechanism 13 pass downward from the top surface of the seedling platform 16. .

On the other hand, the seedling mounting stand 16 is partitioned by a plurality of protruding hollow longitudinal ribs 23 spaced apart by a dimension approximately equal to the width of the seedling pine 18 so that a plurality of seedling pine 18 can be placed in parallel.

Therefore, each longitudinal rib 23 of the seedling stand 16 is
By arranging the seedling platform 16 so that it can reciprocate horizontally by a distance (h2) between the seedling take-out openings 22, 22 at the left and right adjacent positions, the seedling platform 16 can be moved horizontally, for example. When the feed is at the left end position, the left side plate 23a of each vertical rib 23 is close to the left side of the seedling takeout port 22 at the left position, and when the seedling platform 16 is at the right end position, the right side plate 23b of each vertical rib 23 is close to the right side of the seedling take-out port 22 in the right position, and the left and right width (h1) of the seedling pine 18 is
The structure is such that all of the seedlings can pass through 22 seedling take-out ports.

Reference numerals 24 and 24 denote a pair of outlet guide fittings disposed on the left and right sides of each of the seedling take-out ports 22, and each of the outlet guide fittings 24 includes a guide plate portion that comes into contact with the bottom plate 21a of the seedling receiving frame 21; , and a winding end guide body 26 standing upright from the end of the guide plate part, the seedling planting claw 14 passes between the left and right guide plate parts, and the winding The hanging end guide body 26 is disposed at the edge of the upright piece 21b of the seedling receiving frame 21 substantially parallel thereto.

The left and right winding end guide bodies 26, 26 arranged at a distance (h3) apart from each other on the left and right are connected to the seedling take-out port 2.
This guides the winding end portions of a pair of upper and lower endless bodies 20 that are wound so as to surround both the front and back sides of the seedling receiving frame 21 except for the upper and lower ends.

And these left and right opening guide fittings 24, 24
and the seedling receiving frame 21, there is a guide fitting 2 for each outlet.
A position adjusting part is provided to make the seedling receiving frame 4 movable along the longitudinal direction of the seedling receiving frame 21, so that the gap size between the left and right guide plate parts, in other words, the width size of the planted seedlings can be adjusted.

On the other hand, as shown in FIGS. 1 and 2, a movable rib 27 is slidably inserted into the lower end opening of the vertically long rib 23 having a downward U-shaped cross section. A recess 29 extending into the movable rib 27 is formed in the left and right center portions, while a pair of upper and lower guide grooves 28, 28 in the left and right direction communicating with the recess 29 are formed in the distal end surface of the movable rib 27.

Reference numeral 30 indicates an engaging means for engaging the endless body 20 into the recess 29 of the movable rib 27;
The engaging means 30 is composed of a locking metal fitting 33 with a pair of upper and lower claws 32, 32, and a bolt 31 that is inserted into a hole of the locking metal fitting 33 and screwed into the recess 29. The bent portions 20a, 20a, which are parts of the pair of upper and lower endless bodies 20, 20 bent into a U-shape, are held in the respective claw portions 32, 32 of the locking fitting 33, and then inserted into the recess 29. This is then fixed to the movable rib 27 with the bolt 31 (the first
(See Figures 3 to 3).

In this way, each endless body 2
The bent portions 20a and 20a of the movable ribs 20 and 20 are fitted together, and the tip end surface of the movable rib 27 can be brought very close to the surface of the upright piece 21b of the seedling receiving frame 21.

Also, a bolt 3 is attached to the upright piece 21b of the seedling receiving frame 21.
If the through hole 34 of 1 is drilled, the movable rib 27
This makes it extremely easy to screw the bolt 31 into the screw. This through hole 34 is closed with a stopper 35 made of synthetic resin.

In this configuration, during rice planting work, while the seedling mat 18 is placed on the upper surface of the seedling platform 16, the wheels 3,
4, the machine moves straight, and by driving the planting mechanism 13, the seedlings are divided one by one from the seedling pine 18 on the seedling platform 16 using the seedling claws 14, and multiple seedlings are planted in the field. Seedlings can be planted along the rows (8 rows in this example).

In this case, as shown in FIG. 4, for example, the seedling stand 16 is placed in a state in which each vertically long rib 23 thereof is located near the winding end guide body 26 of the pair of upper and lower endless bodies 20, 20. The movable rib 2 fits into the vertically long rib 23 when moving from the direction of the right direction arrow A.
both endless bodies 20 engaged with the engagement means 30 of 7;
20 is forcibly driven, so both of them move laterally, and at this time, the lower edge portion of the seedling pine 18 comes into contact with the working surface of the endless body 20, and accordingly, the lower edge of the seedling pine 18 is collapsed. You can move without getting caught.

Next, when it is reversed at the right end position of the horizontal movement and the seedling platform 16 moves laterally to the left, the seedling platform 16 and the endless body 20 can be moved by simply performing the opposite left and right operations as described above.
The seedling pine 18 on the seedling platform 16 can move laterally in line with the endless body 20, and no relative shearing force will act on it. The seedlings never fall apart.

Then, the bent portion 20 of both endless bodies 20, 20
a, 20a can slide while being locked to both the upper and lower claw portions 32, 32 of the engagement means 30, so that when an unreasonable force is applied in the longitudinal axis direction of the endless body 20, the engagement means Damage to 30 or
It is possible to prevent the endless body 20 from being cut.

Also, when the center line of the horizontal width of the vertically long rib 23 and the movable rib 27 moves beyond the center line of one winding end guide body 26 to the outside,
Since the bent portion 20a of each endless body 20 can be substantially parallel to the width direction of the movable rib 27 at the tip end of the movable rib 27, no unreasonable force is applied to each endless body 20.

Further, the bent portions 20 of the endless body 20 are placed in the pair of upper and lower guide grooves 28, 28 on the tip surface of the movable rib 27.
Since the cross-sectional portion near a and 20a is inserted, when the movable rib 27 moves laterally along the surface of the upright piece 21b of the seedling receiving frame 21, the tip end surface of the movable rib 27 is smaller than the cross-sectional diameter of the endless body 20. Even a small gap can be brought close to the surface of the rising piece 21b.

Note that the spacer 36 shown in FIGS. 1 and 2
is inserted between the bolt 31 and the locking fitting 33 in order to adjust the slack or length of the endless body 20.

FIG. 8 shows another embodiment of the engagement means 30, in which a spring 37 is inserted between the bolt 31 and the locking fitting 33 in place of the spacer 36, and each endless body 20 is
The bent portion 20a of the hook portion 32 of the locking fitting 33
If an unreasonable force is applied to the endless body 20 by pressing it toward the inside of the recess 29 of the movable rib 27 while being locked to the body, the endless body 20 can be moved against the force of the spring 37, thereby preventing the endless body 20 from being damaged. be able to.

FIGS. 9 and 10 show still another embodiment, in which the endless body 40 is formed into a folded closed loop shape that surrounds both the front and back sides of the seedling receiving frame 21 so as to have two strips each. The movable rib 4 has both horizontal U-shaped folded ends 40a, 40a, on which the endless body 40 is placed, slidably attached to the vertically long rib 23.
1 through an engaging means 42 in a detachable manner. That is, the endless body 40 has a circular cross section and is formed into an endless closed loop shape, and the circumferential length of the endless body 40 is approximately four times the distance between the left and right winding end guide bodies 26, 26. As shown in FIG.
Holding a and 40a, the rising piece 21b of the seedling receiving frame 21
By wrapping and enclosing from the back side to the front side along the longitudinal direction, the endless bodies 40 are arranged on both the front and back sides of the seedling receiving frame 21 as if there were two upper and lower strips.

A recess 43 and a pair of upper and lower fitting grooves 44 in the left and right direction communicating with the recess 43 are formed on the distal end surface of the movable rib 41 at approximately the center of the left and right sides, and a U-shaped locking fitting 45 and a bolt 46 are formed. and a spring 47, the left and right U-shaped folded end portions 40a, 40a of the endless body 40 are inserted into and engaged with the recess 43.

At this time, in the pair of fitting grooves 44, 44, there are opposing horizontal U-shaped folded ends 40a, 40a.
Insert.

According to this configuration, the outer peripheral working surface of the endless body 40 can also be associated with the left and right movement in accordance with the left and right movement of the seedling platform 16, and one endless body 40
An endless body with two upper and lower strips can be constructed.

and left and right sideways U-shaped folded ends 40a that are locked on both left and right sides of the locking metal fittings 45;
40a is disposed within the movable rib 41 in a direction substantially perpendicular to the tip end surface and approximately in the center of the left-right width dimension, so that it is difficult to separate from the locking fitting 45.
Moreover, even if the substantially central portion of the movable rib 41 in the left-right width dimension comes to the outside of the center of the winding end guide body 26, it will not come off.

The movable rib 41 in engagement with the endless body 40 is
Since it is attracted to the surface of the seedling receiving frame 21, the tip of the movable rib 41 is always attached to the seedling receiving frame 2.
1, and the gap between the tip of the movable rib and the surface of the seedling receiving frame becomes smaller, so that the engagement between the left and right sideways U-shaped folded ends 40a, 40a of the endless body 40 and the movable rib 41 is reduced. It is possible to make it even more difficult to deviate from the alignment.

Moreover, even if a tension difference occurs between the longitudinal portions of the two strips along the seedling receiving frame 21, the tension will be reduced between the engaging portion of the movable rib 41 and both lateral U-shaped folded ends. The tension is balanced by shifting from the larger side to the smaller side, and it is possible to absorb unbalanced tension, manufacturing errors in the circumference of the endless body, fluctuations in tension due to use, etc. It has the effect of improving the durability of.

Note that if the winding end guide body 26 that supports the endless bodies 20, 40 is made into a pulley-like rotating body, the rotational movement of the endless bodies becomes even smoother. It goes without saying that the present invention can also be applied to a walking rice transplanter.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an enlarged sectional view of the main part indicated by the - line in FIG. 4, and FIG.
The - line sectional view of the figure, Figure 3 is - of Figure 2.
4 is a plan view taken along the - line in FIG. 5, FIG. 5 is an enlarged cross-sectional view of the main part shown in the - line in FIG. 6, FIG. 6 is a plan view of the rice transplanter, and FIG. is a side view,
FIG. 8 is a sectional view of another embodiment, FIG. 9 is a perspective view of still another embodiment, and FIG. 10 is a -
It is a line view. 1... Traveling body, 3, 4... Wheels, 10... Seedling planting device, 16... Seedling mounting stand, 21... Seedling receiving frame, 1
4... Seedling planting claw, 22... Seedling take-out port, 18... Seedling mat, 23... Vertical rib, 20,... Endless body,
20a, 20a...Bending portion, 40... Endless body, 4
0a, 40a... Horizontal U-shaped folded end, 24
...Intake guide fitting, 26...Wrap end guide body, 27, 41...Movable rib, 28...Guide groove, 29,43...Recess, 30,42...Engagement means, 33, 45... Locking metal fitting, 32... Claw portion, 3
1,46... Bolt, 37,47... Spring, 44
...Mating groove.

Claims (1)

[Scope of utility model registration request] A seedling receiving frame is provided opposite to the lower end of the seedling platform, which is provided with a vertical rib that partitions the seedling mats so that they can be placed on the left and right sides of the traveling machine in parallel, and an endless body is placed in the seedling receiving frame except for the seedling take-out port. In the seedling stand device arranged so as to surround a movable rib, a movable rib is attached to the lower end opening of the vertically long rib so as to be slidable only in the longitudinal direction of the vertically long rib, and the tip of the movable rib is attached to the lower end opening of the vertically long rib. ,
A seedling mounting stand device for a rice transplanter, comprising the endless body engaged with the substantially central portion of the left-right width dimension.