JPH104791A - Seedling root cutting machine - Google Patents

Abstract

(57) [Problem] To provide a root cutting machine capable of driving and cutting the roots of a mat-shaped seedling while using a conventional seedling raising box. SOLUTION: A lifting device 5 for rolling up a seedling end in a seedling raising box, and a cutting blade 6 between the seedling thus raised and the seedling raising box.
And a cutting device 7 for driving and cutting the root entangled in the seedling raising box 1 by pushing the cutting device 7. The cutting device 7 comprises a cutting blade 6 wound around a drum 12 and an electric motor 9 for reversibly rotating the drum 12, so that the seedling end is turned up when the cutting blade 6 rushes. Power is transmitted from 7 to the lifting device 5. The one-way clutch 21 is provided so that the lifting device 5 is not driven when the cutting blade 6 is wound up. However, in order to prevent the possibility of reverse driving caused by the rotation, the posture maintaining the biasing device 5 to the operation start position is maintained. Mechanism f
Is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a root cutting machine for mat-like seedlings grown in a nursery box, and more particularly, to placing seedlings in a nursery box so that the seedlings can be easily taken out of the nursery box. The present invention relates to a machine for cutting a root entangled with a surface.

[0002]

2. Description of the Related Art When a mat-shaped seedling is grown in a nursery box, the root of the seedling is entangled and adheres to a drainage hole formed in the bottom of the box. Since a considerable amount of labor is required, it cannot be sufficiently covered by manual work.
No. 6107 proposes a machine for driving and cutting roots of seedlings attached to a nursery box.

[0003]

According to the proposed technique,
Although the root cutting of the seedlings could be mechanized,
For this purpose, a special structure in which one end of the seedling raising box is configured to be openable is required, so that the conventional seedling raising box cannot be used, and there is room for improvement. An object of the present invention is to provide a root cutting machine which can drive and cut the roots of a mat-like seedling while using a conventional seedling raising box.

[0004]

[Means for Solving the Problems]

[Configuration] A first invention is a lifting device for forcibly lifting one end of a mat-shaped seedling grown in a nursery box, and pushing a cutting blade between the mat-shaped seedling whose one end is lifted and the seedling box. A cutting device that drives and cuts the roots of the lower mat-shaped seedlings from the seedling placement surface of the seedling raising box, the cutting device comprising: a cutting blade having flexibility and being wound around a drum; When the drum is rotated forward in the direction in which the cutting blade is unwound and enters between the mat-shaped seedling and the seedling mounting surface of the seedling raising box, With the rotation direction determined so that the lifting operation is performed by the lifting device,
A transmission mechanism for transmitting power from the cutting device to the input shaft of the lifting device is provided, and the transmission mechanism is equipped with a one-way clutch so that power is not transmitted to the input shaft when the drum rotates in the reverse direction in the direction in which the cutting blade is wound up. The input shaft is provided with a posture maintaining mechanism for urging and maintaining the lifting device at the operation start position in order to avoid a rotation drive of the lifting device due to the reverse rotation of the drum.

In a second aspect based on the first aspect, the attitude maintaining mechanism acts on the rotary plate attached to the input shaft and the rotary plate so that the input shaft cannot rotate from the predetermined standby position in the direction in which the drum reversely rotates. And a resilient member that urges the rotating plate in a rotational direction in which the drum rotates reversely when the input shaft is at the predetermined standby position.

According to the first aspect of the present invention, one end of the mat-shaped seedling in the seedling raising box is turned up by the lifting device, and the cutting blade is pushed into the portion turned up by the cutting device to drive the root. Be able to cut. That is,
Even in a conventional seedling box in which a rectangular seedling mounting surface is integrated with a total of four front, rear, left and right side walls, it functions so that a cutting blade can be inserted from above the side walls.

When the cutting blade is driven and inserted between the mat-shaped seedling and the seedling mounting surface of the seedling raising box, one end of the seedling is turned up prior to the cutting blade, so that the drum is rotated in the forward direction. A series of steps of raising the seedlings and cutting the roots are performed simply by performing the above operations. Then, by the function of the one-way clutch, when the cutting is completed and the cutting blade is wound, the lifting device is not driven, so that unnecessary lifting operation of the seedling end can be avoided.

A standby position (start position) of the lifting device at the start of forward rotation of the drum by the attitude maintaining mechanism.
Is surely maintained. That is, even if a one-way clutch is provided, the input shaft may rotate when the drum rotates in the reverse direction, and in this case, the lifting device deviates from the predetermined standby position, and the posture maintaining mechanism functions to prevent it. I do.

According to the second aspect of the present invention, the attitude maintaining mechanism having the above-described operation is constituted by relatively simple mechanical means including a ratchet mechanism and an elastic member. The ratchet mechanism does not hinder the rotation of the input shaft in the direction in which the drum rotates forward, and also allows the input shaft to rotate against the urging force of the elastic member, thereby maintaining the posture of the lifting device in the standby position. The structure does not impair the cutting function.

[Effect] In the root cutter according to claim 1,
(A) By raising the seedling end and pushing the cutting blade in, the root cutting work of the seedlings can be mechanized while using the conventional seedling box, and the means for rotating the drum forward and reverse. Only a simple driving structure is required, and there is little useless driving part, and the lifting device can be provided as a rational state that can be repeatedly operated.

In the root cutter according to the second aspect, in addition to the above-mentioned effect (a), there is an advantage that (b) means for reliably operating the lifting device can be constituted by inexpensive mechanical means.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 5 and FIG. 8 show a seedling root cutting machine including a placement part A for placing the seedling raising box 1 and a cutting part B for cutting the roots of the mat-like seedling W in the seedling raising box 1. It is shown. The mounting portion A is configured by laying a mounting frame 4 over the main body frame 2 and the legs 3, and the nursery box 1 having a mat-shaped seedling W grown to some extent is mounted thereon.

First, an outline of the operation of this root cutter will be described. First, as shown in FIG. 1, a seedling raising box 1 loaded with mat seedlings is placed on a mounting portion A, and then the switch is turned on. To activate the cutting section B. Then, the drum 12 rotates in the direction of arrow A, and the cutting blade 6 wound therearound starts to move forward with the seedling rake plate H, and the first cam 16 rotates to move the operated lever 18. As shown in FIG. 2, the hook-shaped member 13 is swung downward and thrust into the rear end of the mat-shaped seedling W (hooking mechanism a). At this time, the lifting prevention mechanism d functions to maintain the shape of the quadruple link mechanism c in the side view at that time, and the pivot 19 to which the operated lever 18 is attached does not escape upward, so that the hook The member 13 protrudes into the seedling.

Then, as shown in FIG. 3, the second cam 1
7 kicks down the upper arm 22 and moves the quadruple link mechanism c in a direction in which the vertical length thereof is compressed, so that the hook-like member 13 is lifted up to forcibly lift and raise the seedling end. (Elevating mechanism b and lifting assist mechanism h). In the rolled-up state, the cutting blade 6 with the rake plate H enters between the mat-shaped seedling W and the seedling mounting surface 1a (see FIG. 4), and the rotation of the drum 12 continues by the rotation. The cutting blade 6 advances while cutting the root to the front end of the seedling raising box 1 (see FIG. 5).

The cutting blade 6 advances to the front end of the nursery box 1 (FIG. 9).
Then, the drum 12 is rotated in the reverse direction of the arrow B to take up and move the cutting blade 6, and the mat-shaped seedling W whose root connection with the seedling raising box 1 has been released is placed on the seedling rake plate H. The cutting blade 6 remains in the nursery box 1 in the retracted state, and only the cutting blade 6 returns (moves backward). At this time, only the drum shaft 11 is reversely rotated by the one-way clutch 21 mounted on the first cam shaft 14, and the pulling-out facilitating mechanism e (see FIG. 4) functions so that the hook-like member 13 rises at that time. And the mat-shaped seedling W easily falls off from the hook-shaped member 13 while maintaining the posture.
The seedling stopper 20 prevents the mat-shaped seedling W from returning. Then, the drum 12 rotates in the reverse direction to the original position, and the cutting blade 6 returns to the standby position. By operating the seedling rake plate H, the mat-shaped seedling W can be taken out of the seedling raising box 1. At this time, each of the mechanisms a to e and h also returns to the original standby state. Next, the structure of each part will be described.

As shown in FIGS. 1 to 6, the cutting section B includes a lifting device 5 for forcibly lifting and turning one end of the mat-shaped seedling W of the seedling raising box 1, and a mat-shaped seedling W having one end lifted. A cutting device 7 which pushes the cutting blade 6 between the upper and lower sides of the seedling raising box 1 to drive and cut the root of the lower mat-like seedling from the seedling placing surface 1a of the seedling raising box 1; And a drive mechanism 8 for supplying the power to the main body frame 2. The drive mechanism 8 includes an electric motor 9 and a gear mechanism 10, and the gear mechanism 10 transmits a gear to a drum shaft 11 described later.

As shown in FIG. 10, the cutting device 7 is equipped with two flexible metal cutting blades 6 such as spring steel wound in parallel on a drum 12 having a drum shaft 11. It is configured. The cutting blade 6 has a length sufficient to reach the box end of the seedling raising box 1 placed on the mounting portion A, and the end portion thereof is fixed to the drum 12. When the drum shaft 11 is driven to rotate forward in the direction of arrow A, the cutting blade 6 is unwound from the drum 12 and protrudes in the direction of the mounting portion A. When the drum shaft 11 is driven to rotate in the direction shown by arrow B, the cutting blade 6 is driven. 6 is wound around the drum 12 and stored.

As shown in FIGS. 6 and 7, the lifting device 5 is provided with a hooking mechanism a, a lifting mechanism and a lifting mechanism on one of the right and left sides of the main body frame 2 (the left side when the mounting portion A is a front side as a machine). Mechanism b,
A posture maintaining mechanism f and a lifting assist mechanism h are arranged, and a lifting prevention mechanism d and a pull-out facilitating mechanism e are arranged outside the other (the right side if the placing section A is a front as a machine). It is configured.

As shown in FIG. 6, a first camshaft 14 having a first cam 16 mounted on a drum shaft 11 and a second cam having a second cam 17 mounted on the first camshaft 14 are provided. Axis 15
Are arranged respectively, and the shafts 11, 14, and 15 are gear-linked, and a transmission mechanism g that transmits power from the cutting device 7 to the first and second cams 16, 17 is configured. A quadruple link mechanism c in front of the second camshaft 15 includes an upper arm 22 swingable about a fulcrum X1, a lower arm 23 swingable about a fulcrum X2, and a pair of upper and lower arms 22, 23. And a movable lever 24 pivotally connected therewith. The lower arm 23 and the movable lever 24 are pivotally connected, and both the lower arm 23 and the movable lever 24 are provided with a pivotable pivot shaft 19 which is relatively rotatable. The member 13 and the operated lever 18 are integrally mounted.

The hooking mechanism a has a structure in which the first cam 16 kicks up and comes into contact with the operated lever 18 to rotate the pivot 19 in the direction in which the hook-like member 13 swings downward. . The elevating mechanism b has a structure in which the second cam 17 kicks down and contacts the root end of the upper arm 22 to lift and move the movable lever 24. In other words, the hook-shaped member 13 swings down around the pivot shaft 19 whose axis is fixed by the hooking mechanism a, and the four-way link mechanism c reduces its vertical length by the elevating mechanism b. The hook-shaped member 13 is lifted and moved upward by moving in the direction in which it moves.

Further, the operating lever 37 pivotally supported by the fulcrum X3 at the upper rear portion of the main body frame 2 and the tip of the operated lever 18 are connected by a connecting link 38, and contact with the longitudinal middle portion of the operating lever 37. The lifting assist mechanism h is configured by attaching the applicable roller 39 to the second cam 17. This is because when the second cam 17 pushes the upper arm 22 downward, the roller 39 also pushes the action lever 37, and the hook-shaped member 13 is raised in parallel by the elevating mechanism b, and simultaneously the pivot shaft 19 is further moved. It is slightly rotated in the direction of arrow C. As a result, not only is the wobble of the hook-shaped member 13 prevented,
The complex movement moves upward while being stabbed and swayed by the seedling W, and functions to reliably lift and turn the seedling.

As shown in FIG. 7, the lifting prevention mechanism d
A third cam 25 attached to the first camshaft 14 and a fulcrum X
It comprises an upper right arm 26 that can swing around one turn. That is, during the operation of the hook mechanism a, the first camshaft 14
When the arc surface 25a of the third cam 25 centered at the center and the root-side protruding end 26a of the upper right arm 26 contact each other,
The upward movement of the quadruple link mechanism c, that is, the pivot shaft 19 is prevented. Therefore, when the hook-shaped member 13 descends and swings, the pivot shaft 19 does not escape upward and cannot enter the seedling W properly.

The pull-out acceleration mechanism e is composed of a fourth cam 27 attached to the second cam shaft 15 and a regulating arm 28 attached to the pivot 19. That is, before winding the cutting blade 6 by rotating the drum 12 in the reverse direction, it is necessary to lift the hook-shaped member 13 upward to separate it from the mat-shaped seedling W, so that the cutting blade 6 is terminated. In the vicinity of the state in which the hook-shaped member 13 is rushed and moved to above, the hook-shaped member 13 floating above the mat-shaped seedling W placed on the seedling rake board H is suspended in the air while the cutting blade 6 is being wound. Floating hook-shaped member 1
Make sure that 3 does not fall. In other words, the function of maintaining the pivot shaft 19 so as not to rotate in the direction of arrow C is exhibited, and the cutting blade 6 can be smoothly wound up without falling by its own weight and the hook-like member 13 entering the mat-shaped seedling W. It is.

A posture maintaining mechanism f is provided for preventing the first camshaft 14 equipped with the one-way clutch 21 from rotating from the predetermined standby position (start position) when the drum 12 rotates in the reverse direction. is there. As shown in FIG.
The locking pin 29 deviated from the first camshaft 14 is bolted to the side surface of the first cam 16, and the bracket 31 and the locking pin bolted to the body frame 2 at the upper rear position of the first camshaft 14. 29 and a claw arm 34 urged by a return spring 33 so as to prevent the first cam 16 from rotating in the reverse direction (in the direction of arrow D). Formed notch 35
(Which can be engaged with the tip of the claw arm 34) to form a posture maintaining mechanism f.

That is, as shown in FIGS. 1 and 6, when the ratchet mechanism 36 is engaged and the projecting piece 16a of the first cam 16 is located immediately below the operated lever 18, the starting state is started. The locking pin 29 is located below the first camshaft 14, and the first cam 16 is urged and maintained such that the notch 35 urges and contacts the tip of the claw arm 34. Therefore, despite the presence of the one-way clutch 21, the rotation of the first camshaft 14 due to the reverse rotation of the drum 12 is reliably prevented, and the operation is started by rotating the drum 12 in the forward direction. Sometimes the first cam 16, that is, the lifting device 5, is adjusted to the normal start position.

As shown in FIG. 11, the seedling placing surface 1a of the seedling raising box 1 has both ends in the longitudinal direction of the box (about 100 m from the end).
The drainage hole 1b in (m) is omitted to form a flat surface so that the root does not become entangled with the drainage hole 1b.
Thus, the lifting movement of the seedling end by the hook-shaped member 13 can be easily performed.

[Alternative Embodiment] The lifting device 5 may be configured without the lifting assist mechanism h.

[Brief description of the drawings]

FIG. 1 is a side view of a root cutter in a standby state.

FIG. 2 is a side view of the root cutting machine in a state where a hook-like member has protruded into a seedling.

FIG. 3 is a side view of the root cutting machine in a state where a seedling end is turned up.

FIG. 4 is a side view of the root cutter in a state where the cutting blade has entered deeply.

FIG. 5 is a side view of the root cutter with the cutting blade largely moved back;

FIG. 6 is a side view of a left portion of a frame showing a structure of a cutting portion.

FIG. 7 is a side view of the right side of the frame showing the structure of the cutting portion.

FIG. 8 is a plan view of the root cutter in a standby state.

FIG. 9 is a plan view of the root cutter in a state where the cutting blade has entered the terminal end.

FIG. 10 is a perspective view showing a relationship between a cutting blade and a rake plate.

FIG. 11 is a perspective view showing the structure of a nursery box.

[Explanation of symbols]

 Reference Signs List 5 Lifting device 6 Cutting blade 7 Cutting device 8 Drive mechanism 12 Drum 14 Input shaft 16 Rotating plate 21 One-way clutch 32 Elastic member 36 Ratchet mechanism f Posture maintaining mechanism g Transmission mechanism

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuhiko Nishida 64 Ishizukita-cho, Sakai-shi, Osaka Inside Kubota Sakai Works

Claims (2)

[Claims] 1. A lifting device for forcibly lifting one end of a mat-shaped seedling grown in a seedling raising box, and a cutting blade pushed between upper and lower sides of the mat-like seedling whose one end has been raised and the seedling raising box. A cutting device that drives and cuts the roots of the lower mat-shaped seedling from the seedling mounting surface of the box; and a cutting blade that is flexible and wound around a drum; When the drum is rotated forward in the direction in which the cutting blade is unwound and enters between the mat-shaped seedling and the seedling placement surface of the seedling raising box. In a state where the rotation direction is determined so that the lifting operation by the lifting device is performed, a transmission mechanism that transmits power from the cutting device to the lifting device is provided, and the drum is moved in a direction in which the cutting blade is wound. When rotating in reverse, power is transmitted to the lifting device. A one-way clutch is provided in the transmission mechanism so as not to rotate, and a posture maintaining mechanism for biasing and maintaining the lifting device at the operation start position is provided in order to avoid a rotational drive of the lifting device due to reverse rotation of the drum. Seedling root cutting machine. 2. The posture maintaining mechanism acts on a rotating plate attached to an input shaft of the lifting device, and on the rotating plate so that the input shaft cannot rotate in a direction in which the drum rotates reversely from a predetermined standby position. 2. The root cutting method according to claim 1, further comprising: a ratchet mechanism that performs the rotation; and an elastic member that urges the rotating plate in a rotation direction in which the drum rotates reversely when the input shaft is at the predetermined standby position. Machine.