JPH0353615Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is based on a seedling tray that is movable back and forth in the left and right directions with a constant stroke, and a seedling tray that protrudes from the back side to the seedling placement surface side. a seedling vertical feeder that applies a force to vertically feed the placed seedlings toward the seedling take-out port side with respect to the bed soil;
A seedling holding rod capable of pressing the seedlings to be placed on the seedling placing surface side of the seedling placing stand is provided, and a planting transmission device for a planting link mechanism that circulates the seedling holding stand and the planting claw,
When the planting clutch is cut, a fixed position stopping clutch is provided which stops the planting claw at a specific position above the claw tip return trajectory from the planting position to the seedling retrieval position, and is linked to the planting transmission device. A vertical feed operating mechanism is provided between the rotating shaft and the vertical seedling feeder to vertically feed the seedling feeder through contact between the cam and the cam follower when the seedling platform reaches the vicinity of the stroke end; Furthermore, the present invention relates to a seedling planting device for a rice transplanter, which is provided with an interlocking mechanism for switching the seedling presser rod between a presser action position and a lifted presser release position in conjunction with the vertical feed operation mechanism.

[Conventional technology]

The above-mentioned seedling planting device feeds the seedlings vertically into the soil area of the seedbed in order to prevent the placed seedlings from slipping to the side of the seedling take-out port during horizontal feeding, and to prevent the placed seedlings from slipping to the seedling take-out port side by applying pressure by the seedling holding rod. This can be prevented by locking the tool, and when the seedling platform reaches near the end of its stroke, the seedling holding rod is floated to the holding release position so as not to cause vertical feeding resistance, and the seedlings are moved vertically. In order to be able to reliably feed the seedlings vertically by operating the feeder, we also changed the posture of the seedling holding rod and activated the vertical seedling feeder system, which is an essential operation at this time. It is designed to be used effectively, reliably, and easily.

In such a conventional seedling planting device, the cam is moved, and the planting claw reaches a specific stop position above the claw tip movement trajectory after the vertical seedling feeding action by the vertical seedling feeder is completed. In the meantime, a device is known in which the seedling presser lever in the presser release position is switched to the presser action position.

[Problem that the invention attempts to solve]

When initially feeding seedlings to a seedling stand, generally
An operating procedure is adopted in which the planting clutch is cut when the seedling platform reaches the vicinity of the stroke end, in other words, when the final seedling retrieval operation for that row of planting claws is completed. . However, in this case, since the planting claw is stopped at a specific position above the claw tip movement trajectory by the fixed position stop clutch, the seedling presser rod is also switched from the presser release position to the presser action position accordingly. Become. Therefore, in the past, it was necessary to disengage the vertical feed operating mechanism provided between the seedling presser rod and the rotating shaft and switch the seedling presser rods one by one to the presser release position, which required a lot of effort in seedling supply work. There are problems that require time and effort.

The purpose of the present invention is to rationally modify the operation timing between the planting claw, the vertical seedling feeder, and the seedling holding rod, so that the seedling feeding work can be performed quickly and easily. At the point.

[Means for solving problems]

The characteristic structure of the present invention taken to achieve such an object is that the cam or the interlocking mechanism is configured to move the cam or the interlocking mechanism to a specific stopping position above the planting claw after the vertical seedling feeding action by the vertical seedling feeding device is completed. The present invention is configured so that the seedling presser rod, which is in the presser release position, is switched to the presser action position and started when the seedling is moved from the seedling to the seedling take-out position, and its functions and effects are as follows.

[Effect]

That is, at the beginning of taking out the seedlings, the contact area between the front end surface of the placed seedlings and the seedling stand is large, so even if the seedling holding rod is in the holding release position, the placed seedlings will not fall off. Focusing on this fact, we set the timing to start switching the seedling presser after the end of the vertical seedling feeding action.
In addition, by setting the setting before the seedling take-out operation, the seedling presser rod can be held in the presser release position during seedling feeding.

[Effect of idea]

Therefore, there is no need to disengage the vertical seedling feeding mechanism one by one as in the past, and the seedling feeding work can be done quickly by simply and inexpensively modifying the operation timing of the cam or interlocking mechanism as described above. ,
I was able to do it easily.

〔Example〕

Hereinafter, an embodiment of the present invention will be described regarding a seedling planting device of a six-row riding rice transplanter.

1 is a link mechanism 2 for lifting and lowering the passenger aircraft A.
This is a planting transmission case that is connected to the planting transmission case 1 so as to be able to be driven up and down through the transmission case 1, and the transmission case portions 1a that extend rearward from three locations appropriately spaced in the left and right direction of the planting transmission case 1 include: A planting link mechanism 4 is provided that causes the planting claws 3 to undergo forced circulation movement.

C ₁ is inside mission case M of passenger aircraft A.
In addition, C 2 is a planting clutch interposed in a transmission mechanism to the input shaft 5 of the planting transmission case 1, and C ₂ is a planting clutch interposed in the transmission mechanism to the input shaft 5 of the planting transmission case 1. These are clutches (hereinafter referred to as row clutches) that are interposed in the planting transmission devices.

C ₃ is when the planting clutch C ₁ is disengaged and activated;
This is a fixed position stopping clutch that stops the planting claw 3 at a specific position 2 on the upper side of the claw tip return trajectory from the planting position to the seedling take-out position.

Reference numeral 6 denotes a seedling resting stand which is tilted to the ground and capable of horizontally placing six pine-shaped seedlings in parallel and can be moved back and forth in the left and right directions. A rail 7 that slides and guides the lower end of a group of pine-shaped seedlings has seedling take-out ports 8 formed at a predetermined interval in the left-right direction.

The means for driving and reciprocating the seedling stand 6 in the lateral direction is constructed as follows.

That is, the left and right connecting arms 10 of the seedling stand 6 are connected to both ends of the transverse feed shaft 9 which is slidably and rotatably supported through the planting transmission case 1 so that they can only rotate relative to each other. A piece member 12 that is engaged in a helical groove of a helical shaft 11 supported in the planting transmission case 1 is fixed to the central portion in the longitudinal direction of the feed shaft 9, thereby controlling the driving rotation of the helical shaft 11. By the lateral movement of the top member 12, the seedling stand 6 is driven and reciprocated from side to side via the lateral feed shaft 9 and the connecting arm 10.

13 is positioned so as to protrude from the back side toward the seedling placement surface 6b through an opening 6a formed in a notch at the lower end of the slanted seedling table 6, and is located on the side of the seedling take-out port 8 with respect to the bed soil of the placed pine-shaped seedlings. This is a vertical seedling feeding tool that uses a star wheel to apply vertical feeding force to the seedling table 6.
It is fixed to a vertical feed shaft 14 which is rotatably supported on the back side.

B is a vertical feed operation mechanism that rotates the seedling vertical feeder 13 by a certain angle in the seedling vertical feed direction when the seedling tray 6 reaches the vicinity of the stroke end. It is structured as follows.

That is, when the seedling stand 6 reaches the vicinity of the stroke end on both left and right sides of the shaft portion of the horizontal feed shaft 9 located inside the planting transmission case 1, the screw shaft 1
A cam follower 16 that is forcibly rotated by a certain angle by contacting one of a pair of left and right cams 15 fixed to the cam follower 16 is fixed, and the cam follower 16 of the horizontal feed shaft 9 is
An arm 17 fixed to a shaft portion located outside the planting transmission case 1 and an arm 18 attached to the vertical feed shaft 13 via a one-way rotating clutch such as a ratchet are pivotally connected via a link 19. Further, the transverse feed shaft 9 is configured to be elastically biased in the return direction.

Reference numeral 20 denotes a seedling holding rod capable of pressing the placed pine-shaped seedlings against the seedling placing surface 6b side of the seedling placing table 6, and between this seedling holding rod 20 and the seedling placing table 6, there is a seedling holding rod in a holding position. A multiple link mechanism 21 is also provided that can float and swing a certain seedling holding rod 20 parallel or almost parallel to the seedling rest 6, and then float and swing the attached base end side as a branch. .

This multiple link mechanism 21 is constructed by having brackets 22, 22 erected on left and right partition frames 6c, 6c of the seedling stand 6, respectively, swinging around the axes of pins 21a, 21b extending in the left and right direction. A pair of freely left and right first links 21c, 21c and a second link 2
1d and 21d, among which the second link 21
d, 21d, the seedling presser rod 20
A plurality of support rods 23 are attached to each seedling placement portion of the seedling placement table 6, and a third link 21 fixed to the support rod 23 is installed.
The locking pins 21f, 21f of e are inserted into the elongated holes 21 formed at one end side of the first links 21c, 21c.
g, 21g and elongated holes 22a, 22a formed in the brackets 22, 22 and having a substantially inverted L shape when viewed from the side.
A spring 21h is provided which engages the seedling presser rod 20 and urges the seedling presser rod 20 to move toward the pressing action position, that is, toward the seedling placement surface 6b of the seedling placement stand 6.

When the free end of the second link 21d is pulled down against the elastic biasing force of the spring 21h, the first
Until the links 21c, 21c swing to the maximum,
The seedling holding rod 20 floats and moves almost parallel to the seedling resting platform 6, and after that, the locking pin 21f moves along the long hole 21g of the first link 21c to the bracket 22.
Since the seedling holding rod 20 is moved into the locking portion of the inverted L-shaped long hole 22a, the seedling holding rod 20 is swung to a retracted position in which the seedling holding rod 20 is largely raised from the seedling resting table 6.

Reference numeral 24 denotes an interlocking mechanism that operates in conjunction with the vertical feed operation mechanism B to switch the seedling presser rod 20 between a presser action position and a lifted presser release position.

This interlocking mechanism 24 has a rotatable support shaft 24c provided with first and second arms 24a, 24b whose orientations differ by approximately 90 degrees, mounted on a bracket 25 fixed to the back surface of the seedling stand 6. The first arm 24a and the arm 17 of the vertical feed operation mechanism B
are pivotally connected via a third arm 24e with an adjustment bolt 24d, and the second arm 24b
A pin 24g that can engage with a hook 24f pivotally connected to the second link 21d of the multiple link mechanism 21 is fixed to the tip of the vertical seedling feeder 13.
By pushing down the hook 24f in conjunction with the vertical seedling feeding operation, the seedling presser rod 2 in the presser action position is
0 to the presser release position against the elastic biasing force of the spring 21h.

The cam 15 has a cam surface that operates the seedling holding rod 20 at the following timing depending on the relationship between the planting claw 3 and the vertical seedling feeder 13. That is,
This cam surface is formed at the time when the planting claw 3 passes through the seedling take-out port 8 and the seedling vertical feeding operation by the seedling vertical feeding device 13 starts (the first
Immediately before the position indicated by B in Figs. 3 has passed the seedling planting position and the vertical feeding operation by the vertical seedling feeder 13 has been completed (the position shown by C in FIGS. 1 and 4), the seedling presser rod 20 is moved to the presser release position. A cam surface portion 15a that completes the switching operation; a cam surface portion 15b that maintains the seedling presser rod 20 in a press release position until the planting claw 3 moves to a specific stop position above the claw tip movement trajectory; and a planting claw. 3 moves from the upper specific stop position of the claw tip movement trajectory to the side of the seedling take-out port 8, the seedling presser rod 2
0 from the presser release position to the presser working position, and immediately after the planting claw 3 passes the seedling take-out port 8 (the position shown by D in Figs. 1 and 4), the presser of the seedling presser rod 20 is started. The cam surface portion 15c that completes the switching operation to the working position and the planting claw 3 act to hold down the seedling presser rod 20 until they move from the position shown by D in FIGS. 1 and 4 to the position shown by E. and a cam surface portion 15d that maintains the posture.

Further, the locking portion of the hook 24f has a tapered shape with an inclined surface a that can be locked over the pin 24g.

Reference numeral 26 denotes an operating lever linked to the respective row clutch _C2 , and is attached to an operating box 28 provided on the upper back side of the seedling stand 6, which can be operated from the control section 27 of the passenger aircraft A.

Reference numeral 29 denotes an interlock release operation mechanism that can freely switch the interlock mechanism 24 between an interlock state and an interlock release state. can move freely within the
In addition, a movable member 29c is provided in which a locking groove 29b for the hook 24f of the interlocking mechanism 24 is formed, and this movable member 29c and the operating lever 26 are linked via a rod 29d. A bracket 29e that locks one end of the spring 21h is fixed at a position displaced upward in the vertical direction of seedling feeding with respect to the vertical plane of the seedling placement surface 6b passing through the pin 21b of the multiple link mechanism 21. It is composed of

Then, when the operating lever 26 is operated to the clutch release position, the rod 29d and the movable member 29
The hook 24e is swung upward via the pin 24f of the second arm 24b, and the engagement between the hook 24e and the pin 24f of the second arm 24b is released. Along with this, a seedling presser rod of 20
is swung toward the seedling placement surface 6b by the elastic biasing force of the spring 21h, so the seedling holding rod 20, which is provided to prevent the inchworm phenomenon of the placed seedlings, is effectively utilized to hold the dormant rows. This makes it possible to prevent the placed seedlings from sliding toward the seedling take-out port 8 side. Moreover,
At this time, the bracket 29e that locks one end of the spring 21h also moves together with the movable member 29c, and the elastic urging force of the spring 21h to move the seedling holding rod 20 toward the seedling placement surface 6b increases. It is possible to more reliably prevent the placed seedlings from sliding toward the seedling take-out port 8 side.

When the operating lever 26 is operated to the clutch engaged position ON, the movable member 29c and the hook 24f move toward the seedling removal port 8 side. At this time, Hook 24
Even if the engagement part of f and the pin 24g of the second arm 24b are misaligned in the hook longitudinal direction, the second arm 24b swings close to the seedling stand 6 side during the next vertical feeding of the seedlings. , this second arm 2
The pin 24g of the hook 24b presses the inclined surface a of the hook 24f, causing the hook 24f to swing upward, and the locking portion of the hook 24f engages with the pin 24g. In other words, the inclined surface a formed on the locking portion of the hook 24f allows the locking portion of the hook 24f to connect with the second arm 2.
Regardless of the positional relationship between pin 4b and pin 24g, these two can be reliably engaged.

Furthermore, the adjustment bolt 24d allows the arm 1 to
Since the contact timing with respect to the pin 17a fixed to the pin 7 can be freely adjusted, for example,
When the soil on which the seedlings are placed is thick, there is an advantage that by making the contact timing earlier, a delay in releasing the pressure of the seedling presser rod 20 during vertical feeding of the seedlings can be prevented.

In the above-described embodiment, a screw shaft for reciprocating the seedling platform 6 from side to side is used as the rotating shaft 11 that transmits power to the vertical seedling feeder 13.
It may also be implemented by providing a dedicated rotating shaft.

In addition, by using the cam 15 that is commonly used for the seedling vertical feeder 13 and the seedling presser rod 20, the seedling presser rod 20
is configured to operate at the above-mentioned timing, but a dedicated cam or interlocking mechanism 24 that operates only the seedling presser rod 20 may be used to operate the seedling presser rod 20 at the above-mentioned timing.

[Brief explanation of the drawing]

The drawings show an embodiment of the seedling planting device of the rice transplanter according to the present invention, and FIGS. 1 to 3 are longitudinal sectional side views of the main parts, FIG. 4 is an enlarged sectional view of the cam, and FIG. 5 is the main parts. Figure 6 is an enlarged view of the interlock release operation mechanism, Figure 7 is a partially cutaway plan view showing the drive system and clutch operation system for the seedling stand, and Figure 8 is the rear side of the riding rice transplanter. It is a diagram. 3... Planting claw, 4... Planting link mechanism, 6...
Seedling stand, 6b... Seedling placement surface, 8... Seedling take-out port, 11... Rotating shaft, 13... Seedling vertical feeder, 15
...Cam, 16...Cam follower, 20...Seedling holding rod, 24...Interlocking mechanism, B...Vertical feed operation mechanism, _C1 ...Planting clutch, _C3 ...Fixed position stopping clutch.

Claims (1)

[Scope of Claim for Utility Model Registration] A seedling mounting surface 6b is placed from the back side of the seedling mounting table 6, which is movable back and forth in the left and right directions with a constant stroke.
A vertical seedling feeder 12 protrudes from the side and applies a vertical feeding force to the soil portion of the bed of the placed seedlings toward the side of the seedling take-out port 8; 6b
A seedling holding rod 20 that can be pressed on the side is provided in the planting transmission device for the planting link mechanism 4 that circulates the seedling platform 6 and the planting claws 3, and when the planting clutch _C1 is cut, A fixed position stop clutch that stops the planting claw 3 at a specific position above the claw tip return trajectory from the planting position to the seedling removal position.
A cam 15 and a cam follower 16 are provided between the rotary shaft 11 and the vertical seedling feeder 13 _, which are interlocked with the planting transmission device, when the seedling platform 6 reaches the vicinity of the stroke end. A vertical feed operation mechanism B is provided which vertically feeds the seedling vertical feeder 13 by contact, and further, in conjunction with this vertical feed operation mechanism B, the seedling presser rod 20 is moved to the presser working position and the presser is released. A seedling planting device for a rice transplanter, which is provided with an interlocking mechanism 24 that switches the posture, and the cam 15 or the interlocking mechanism 2
4, the seedling presser rod 20 is in the presser release position after the seedling vertical feeding action by the seedling vertical feeder 13 has been completed and at the time of movement from the upper specific stop position of the planting claw 3 to the seedling take-out position. A seedling planting device for a rice transplanter configured to switch to a holding position and start the rice transplanter. The seedling planting device for a rice transplanter according to claim 1, wherein the rotating shaft 11 has a screw shaft for reciprocating the seedling table 6 from side to side.