JPH0353614Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a seedling stand, which is located protruding from the back side of the stand to the side on which the seedlings are placed, and which is placed against the bed soil of the pine-shaped seedlings placed on it. A seedling vertical feeder that applies a vertical feeding force toward the seedling take-out port side, a seedling holding rod that can press the placed pine-shaped seedlings against the seedling placement surface side of the seedling platform, and a holding rod that acts to hold down the seedling holding rod. A spring is provided to elastically move and bias toward the posture side, and between the seedling vertical feeder and the seedling holding rod, when the seedling vertical feeding device is in a feeding stopped state, the seedling holding rod is held down to the working position. The present invention also relates to a seedling planting device which is provided with an interlocking mechanism that switches the seedling holding rod to a holding release position in which it floats against the elastic biasing force of a spring when the seedling vertical feeder is in the seedling feeding state.

[Conventional technology]

The above-mentioned seedling planting device prevents the placed seedlings from slipping toward the seedling take-out port side during horizontal feeding by a stopper action by the pressure of a seedling holding rod, and by a vertical seedling feeder that enters the soil of the seedbed due to the pressure by the seedling holding rod. In addition, 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 fed vertically. In order to reliably feed the seedlings vertically by activating the tool, we also enabled the operation of the vertical seedling feeder system, which is an essential operation at this time, by switching the posture of the seedling holding rod. It has been designed so that it can be used reliably and easily.

Such a conventional seedling planting device includes a blocking posture that abuts the front end of each row of seedlings on the seedling platform to prevent the seedlings from sliding toward the seedling take-out port;
A device is known that is provided with a seedling stopper that can be freely switched between a release position in which the placed seedlings are retracted above the top surface of the bed soil and allowed to slide toward the seedling take-out port.

[Problem that the invention attempts to solve]

When using this conventional device, when changing the number of planting rows in the planting process just before the ridge edge, first cut the clutch corresponding to the stop row, and then place the seedlings on the seedlings corresponding to the stop row. The seedling stopper is lifted along the mounting surface of the stand, and in this state, the seedling stopper is switched from the releasing position to the blocking position to prevent the lifted seedling from sliding. Therefore, when changing the number of rows to be planted, it is necessary to lift relatively large seedlings one by one, and if the bed soil of the seedlings gets caught in a part of the vertical seedling feeding device that operates intermittently, this Since the vertical seedling feeder acts as a brake, it takes a lot of effort and effort to change the number of planting rows. In addition, in order to install a seedling stopper near the seedling holding rod,
There are also problems that impose various constraints on their design and production.

The purpose of the present invention is to make it possible to simplify the structure and to easily change the number of planting rows by making a rational modification using a seedling holding rod.

[Means for solving problems]

The characteristic structure of the seedling planting device taken to achieve this purpose is that it is provided with an interlock release operation mechanism that can freely switch the interlocking mechanism between an interlocking state and an interlock release state, and a release operation mechanism of the interlock release operation mechanism. The present invention is configured such that the elastic biasing force of the spring to move the seedling holding rod toward the seedling placement surface side can be changed to a greater state in conjunction with the operation, and its functions and effects are as follows.

[Effect]

When changing the number of planting rows during the planting process just before the ridge edge, simply by operating the interlock release operation mechanism corresponding to the stop row, you can not only switch the interlock mechanism to the interlock release state, but also In conjunction with
Since the elastic biasing force of the spring provided to elastically move and bias the seedling holding rod to the holding position can be increased, the above-mentioned spring provided to prevent the inchworm phenomenon of the placed seedlings can be increased. By effectively utilizing the seedling holding rod, it is possible to reliably prevent the seedlings placed on the dormant row from accidentally slipping down toward the seedling take-out port.

[Effect of idea]

Therefore, there is no need to lift the seedlings corresponding to the stopping rows or to provide a special seedling stopper as in the past, and the work of changing the number of planting rows can be done efficiently and easily while simplifying the structure. be able to.
Moreover, during normal seedling planting work, it is possible to set the elastic biasing force of the seedling holding rod to the minimum necessary, so the driving force for changing the posture of this seedling holding rod is small, and each It has now become possible to increase the durability of the structural members as much as possible.

〔Example〕

An embodiment of the present invention will be described below regarding a seedling planting device for 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 link mechanism 4 is provided for forcing the planting claws 3 to perform a forced circulation movement.

Reference numeral 5 designates clutches (hereinafter referred to as row clutches) that are located within the planting transmission case 1 and interposed in the transmission system to the link mechanism 4 for driving the planting claws in units of rows.

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 the pine-shaped seedling group 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 with the helical structure of the screw shaft 11 supported in the planting transmission case 1 is fixed to the central portion in the longitudinal direction of the feed shaft 9. By the accompanying 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 drive mechanism that rotates the seedling vertical feeder 13 by a certain angle in the seedling vertical feed direction when the seedling platform 6 reaches the stroke end, and this vertical feed drive mechanism B is as follows. It is configured.

That is, when the seedling stand 6 reaches the stroke end, a pair of left and right arms 15 fixed to the screw shaft 11 are attached to the left and right sides of the shaft portion of the horizontal feed shaft 9 located inside the planting transmission case 1. A passive arm 16 that is forced to rotate by a certain angle by contacting one side of the
An arm 17 is fixed to a shaft portion of the horizontal feed shaft 9 located outside the planting transmission arm 1, and an arm 18 is attached to the vertical feed shaft 13 via a one-way rotation clutch such as a ratchet.
are pivotally connected via a link 19, and configured to elastically bias the lateral feed shaft 9 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 provided which can levitate and swing a certain seedling holding rod 20 parallel or almost parallel to the seedling resting table 6, using its attachment base end as a fulcrum.

This multiple link mechanism 21 is constructed by having brackets 22, 22 installed in the left and right partition frames 6c, 6c of the seedling stand 6, respectively, which are swingable around the axes of pins 21a, 21b extending in the left and right direction. A pair of left and right first links 21c, 21c and a second link 2
1d and 21d, among which the second link 21
d, across one end of 21d, the seedling holding rod 2
A plurality of support rods 23 are installed in which a plurality of 0 are attached to each seedling placement portion of the seedling placement table 6, and a third link 21 is fixed to the support rod 23.
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 holding rod 20 and urges it to move toward the working position side, that is, the side of the seedling mounting surface 6b of the seedling mounting table 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 table 6, and from then on, the locking pin 21f moves to the first position.
Bracket 2 along long hole 21g of link 21c
Since the seedling holding rod 20 is moved into the locking portion of the inverted L-shaped long hole 22a of No. 2, the seedling holding rod 20 is accordingly swung to a retracted position in which the seedling holding rod 20 is largely raised from the seedling resting table 6.

Reference numeral 24 indicates that when the vertical seedling feeder 13 is in the vertical feed stop state, the seedling presser rod 20 is in the holding position, and when the seedling vertical feeder 13 is in the seedling vertical feed condition, the seedling presser rod 20 is moved. This is an interlocking mechanism that switches to the 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 drive 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 20 in the holding position is switched to the holding release position against the elastic biasing force of the spring 21h.

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 5, 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. A movable member 29c is provided which is movable within and has a locking groove 29b for the hook 24f of the interlocking mechanism 24, and this movable member 29c and the operating lever 26 are linked via a rod 29d. One end of the spring 21h is locked at a portion of the movable member 29c that is displaced upward in the vertical seedling feeding direction 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 constructed by fixing a bracket 29e.

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, the seedling holding rod 2
0 is swung toward the seedling placement surface 6b by the elastic biasing force of the spring 21h, the seedling holding rod 20, which is provided to prevent the placed seedlings from becoming inchworms, can be effectively used to hold the dormant rows. This can 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 seedling placement surface of the seedling holding rod 20 is moved by this spring 21h.
Since the elastic biasing force for moving toward the b side 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 bed soil portion of the seedlings placed on the seedlings is thick, there is an advantage that by making the contact timing earlier, a delay in releasing the holding of the seedling holding rod 20 during vertical feeding of the seedlings can be prevented.

[Brief explanation of drawings]

The drawings show an embodiment of the seedling planting device according to the present invention, and FIGS. 1 to 3 are longitudinal sectional side views of main parts, respectively;
Figure 4 is a developed sectional view of the main parts, Figure 5 is an enlarged view of the interlock release operation mechanism, Figure 6 is a partially cutaway plan view showing the drive system and clutch operation system of the seedling stand, and Figure 7 is a passenger It is a rear side view of a rice transplanter. 6...Seedling rest, 6b...Seedling placement surface, 8...Seedling take-out port, 13...Seedling vertical feeder, 20...Seedling holding rod, 21h...Spring, 24...Interlocking mechanism, 29
...Interlock release operation mechanism.

Claims (1)

[Scope of utility model registration request] A vertical seedling feeder is located on the seedling tray 6 and protrudes from the back side thereof toward the seedling loading surface 6b side, and applies a vertical feeding force to the soil portion of the bed of the placed pine-shaped seedlings toward the seedling take-out port 8 side. The tool 13, the seedling holding rod 20 capable of pressing the placed pine-shaped seedlings against the side of the seedling placement surface 6 of the seedling placement table 6, and the seedling holding rod 20 are elastically moved and biased toward the holding position. A spring 21h is provided between the seedling vertical feeder 13 and the seedling presser rod 20, and when the seedling vertical feeder 13 is in the feeding stop state, the seedling presser rod 20 is held in the holding position, and the seedling presser rod 20 is held in the seedling vertical position. The seedling planting device is provided with an interlocking mechanism 24 that switches and operates the seedling holding rod 20 to a holding release position in which it floats against the elastic biasing force of a spring 21h when the feeder 13 is in the seedling feeding state,
An interlocking release operation mechanism 29 is provided which can freely switch the interlocking mechanism 24 between an interlocking state and an interlocking release state, and in conjunction with the interlocking release operation of this interlocking release operation mechanism 29, the seedling holding rod 2 is moved by the spring 21h.
This seedling planting device is configured to be able to change the elastic biasing force of the seedlings 0 toward the seedling placement surface 6b to a larger state.