JPS649Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Technical field) This invention can be connected to a power source such as a tiller,
This invention relates to a root cutting device that mechanizes the root cutting work of seedlings.

(Prior Art) Before planting seedlings of vegetables, strawberries, etc., it is necessary to carry out so-called root cutting and take out the seedlings from the nursery. Taking strawberries as an example, root cutting is performed once or twice depending on the variety and shipping period, although this varies depending on the region. However, this root cutting work had to be done manually using a hoe because there was no suitable equipment available. For this reason, cutting the roots itself requires a huge amount of man-hours, especially when the area of the nursery is large. In addition, since it takes several days to cut roots once, there is a difference in flower bud timing between seedlings that are cut first and seedlings that are cut later, which is a major factor in the variation in quality of seedlings. There were also problems.

(Purpose) In view of the above circumstances, the purpose of this invention is to provide a root cutting device for strawberry seedlings that can be connected to a power source such as a tiller to cut the roots of strawberry seedlings using mechanical power. shall be.

(Example) This invention will be described below based on an example shown in the drawings. In FIGS. 1 and 2, the connecting part 2 of the strawberry seedling root cutting device 1 has a structure in which two opposing sides of a steel plate bent in a U-shape are connected via a collar 3 at a symmetrical position, A connecting pin hole 4 is formed in the center of this collar 3 and passes through the collar 3 vertically. A nut 5 is fixed to the inner surface of the end portion of the vertically running side wall of the connecting portion 2 by spot welding or the like, and an escape hole 6 is provided in the side wall corresponding to the nut 5. A connecting bolt 7 is screwed into the nut 5 so as to face the pulling direction of the strawberry seedling root cutting device 1 (leftward in FIG. 2, hereinafter abbreviated as "forward"). A support beam 8 is fixed to the rear wall of the connecting portion 2 so as to protrude rearward. The support beam 8 is made up of a beam base 8a made of two pipes and a beam main part 8b made of a slightly thick pipe, which are rigidly connected parallel to each other on a rectangular steel plate substrate 8c. It is fixed to the rear wall of the connecting part 2 by welding. A locking ring 9 is fitted on the outer periphery of the rear end of the beam main portion 8b, and is attached to the beam main portion 8b by means of penetration using parallel pins 10 and split pins 11.

Further, as shown in FIG. 4, a U-shaped base 12 having two parallel surfaces is protruded from the upper rear surface of the substrate 8c. Relief holes 13 are provided at mutually corresponding positions on two mutually parallel wall surfaces of the base, and an adjustment nut 14 is integrally fixed to the outside of the relief holes 13. And this adjustment nut 1
4 has an adjustment bolt 15 screwed into it from the outside.

The support arm 16 includes a tubular main part 16a that fits into the beam main part 8b of the support beam 8, an arm part 16b with a hexagonal cross section extending at right angles from the rear part of the main part 16b, and a guide part 16c. A clamped piece 17 having a constant thickness is provided protruding in the radial direction from the outer periphery of the distal end of 16a. The main part 16a of the support arm 16 is fitted from the rear into the main part 8b of the support beam 8, and is locked in the front-rear direction by the locking ring 9, the parallel pin 10, and the split pin 11. 17 is also fixed around the beam main portion 8b by being held by the ends of the adjustment bolts 15, 15.

The guide portion 16c is a hexagonal steel tube having a size to be guided by the arm portion 16b, and can be fixed to the arm portion 16b by changing its position in stages using positioning pins 18 and pin holes 19. This guide part 1
A nut 20 is provided on the side of 6c,
The arm portion 16b is fixed by the fixing bolt 21 screwed thereon.
It is more securely locked against. A blade guide 22 made of a hexagonal steel tube is integrally fixed vertically to the central portion of the guide portion 16c by welding.

A guide post 23a of a holder 23 is fitted into the blade guide 22 from below and guided in the vertical direction.The guide post 23a is fixed by changing its position in stages using a positioning pin 25 and a pin hole 26. At the same time, it is securely locked by a nut 27 and a fixing bolt 28 provided on the side surface of the blade guide 22. A main body 23a of the blade holder 23 is fixed to the lower end of the guide post 23a. The main body 23a has a rectangular plate shape and has a mounting hole 35 (see Figure 2) at the center of its lower side, and arc-shaped elongated holes 2 centered around the mounting hole 35 on both sides in the front and back direction.
4 has been processed.

A blade angle adjusting bolt arm 29 extends rearward from the upper part of the main body 23a. Near the rear end of the arm 29, both ends of a support pin 31, into which a long adjustment bolt 30 is screwed, are horizontally supported.

The blade body 32 includes a vertical portion 32a that runs vertically, and a horizontal portion 32 that runs horizontally from the lower end of this vertical portion 32a.
b, and when viewed in the front-back direction, it forms an L-shape. The blade holder 2 is attached to the upper end of the vertical portion 32a.
At the position corresponding to the mounting hole 35 of No. 3 and the elongated hole 24,
A stud bolt 33 is erected. The blade body 32 is fixed to the blade holder 23 by fitting the stud bolt 33 into the mounting hole 35 and the elongated hole 24 and tightening the fixing nut 34.

Further, an open end of a U-shaped connecting fitting 37 is connected to an extending portion at the rear upper end of the vertical portion 32a via a connecting pin 36. The lower end of the adjustment bolt 30 is rotatably connected to the upper end of the coupling fitting 37 in the axial direction.

The front edge of the blade body 32 is a blade portion 38 made of hard steel.
is provided across the vertical portion 32a and the horizontal portion 32b. On the other hand, rod-shaped lifters 39 are provided at three locations on the rear edge of the horizontal portion 32b of the blade body 32, diagonally upward with respect to the front-rear direction (traction direction).

In the above configuration, first, the strawberry seedling root cutting tool 1 is connected to a power source 40 such as a tiller. In this connection, as shown in FIGS. 3 and 5, the connection portion 2 is connected to the connection seat 41 of the power source 40.
are fitted from behind, and the connecting pins 42, 42 are inserted into the connecting pin holes 4, 4 from above to connect them. Furthermore, by rotating the connecting bolts 7, 7 provided on the left and right sides of the connecting portion 2 and bringing the tips of their heads into contact with the rear wall of the connecting seat 41, the connecting portion 2 and the connecting seat 41 can be securely connected without wobbling. Link.

Next, in the towed state, the position of the blade holder 23 with respect to the blade guide 22 is determined so that the horizontal portion 32b of the blade 32 is approximately horizontal, and the positioning pin 25 is inserted into the pin hole 26 and the fixing bolt 28 is tightened. Tighten to fix the guide post 23a. The leveling of the horizontal portion 32b of the blade body 32 in the front-rear direction can be performed more precisely using the adjustment bolt 30. When the adjusting bolt 30 is screwed in, the connecting pin 36 is pushed down via the connecting fitting 37, so the blade body 32 rotates around the stud 33 at the center of the upper end of the vertical portion 32a. At this time, the front and rear stud bolts 33, 33 each move in the elongated hole 24 of the blade holder main body 23b. As a result, the horizontal portion 32b rotates in a direction that lifts its front edge upward. When the adjusting bolt 30 is loosened, the connecting pin 36 is lifted upward via the connecting fitting 37, so that the horizontal portion 32b rotates in the opposite direction. After the horizontal part 32b is leveled in the front and back direction, it is fixed to the blade holder main body 23 by the fixing bolt 34.
fixed relative to b. Horizontal part 32b of blade body 32
Horizontally leveling is performed using adjustment bolts 15, 15 attached to the base 12 of the support beam 8.
[See Figure 4] For example, if you want to rotate the horizontal part 32b clockwise toward the front, first screw in the adjustment bolt 15 provided on the right side of the base 12, then screw in the adjustment bolt 15 on the left side. . Then, the main part 1 of the support arm
The left side surface of the supported piece 17 provided at 6a is pushed by the tip of the left adjustment bolt 15, the entire support arm 16 rotates, and as a result, the horizontal portion 32b rotates clockwise. After the leveling of the horizontal portion 32b is completed, when the right adjustment bolt 15 is screwed in, the clamped holding piece 14 is securely clamped and fixed by the left and right adjustment bolts 15, 15. When the horizontal portion 32b is rotated counterclockwise, the above procedure may be reversed from left to right.

Next, in order to cut roots of strawberry seedlings using the root cutting tool 1 connected to the power source 40 in this manner, the position of the power source 40 relative to the seedbed 43 is determined as shown in FIG. In this state, slide the support arm guide part 16c left and right, position it so that the right end of the horizontal part 32b of the blade body 32 reaches slightly to the right of the center line of the seedbed 43, and then insert the positioning pin 18
is inserted into the pin hole 19 and fixed with the fixing bolt 21.

With the above, all the adjustments necessary to start the root cutting work are completed. Root cutting work is performed by towing this strawberry seedling root cutting tool 1 using a power source 40.

By this traction, the blade body 32 cuts the lower half of the strawberry seedbed 43 along its blade surface and performs root cutting.
At this time, the blade body 32 receives a rearward drag force, which generates a moment that lifts the strawberry seedling root cutting tool 1 around the power shaft 44 of the power source 40. However, this moment is usually partially canceled out by the moment in the opposite direction due to the weight of the strawberry seedling root cutting tool 1, and when the horizontal part 32b is lifted, the moment due to the downward force that is generated and increases depending on the angle of the horizontal part 32b. Since it is perfectly balanced,
The blade body 32 can be stably maintained in a horizontal state. In addition, the cut strawberry seedbed is removed by a lifter 39 extending diagonally upward from the rear edge of the horizontal part 32b of the blade body.
Since the strawberry seedlings are lifted somewhat upward and completely separated from the ground below, it is extremely easy to take out the strawberry seedlings after root cutting.

(Effects) As explained above, this invention not only makes it possible to cut the roots of seedlings automatically using a power source such as a conventional tiller, but also very easily and in a short time. This has the practical effect of suppressing variations in the flower bud timing of seedlings and aligning the harvest timing by shortening the working time.

[Brief explanation of the drawing]

Fig. 1 is a front view of the embodiment attached to a power source, Fig. 2 is a side view thereof, Fig. 3 is a sectional view taken along line A-A of Fig. 1, and Fig. 4 is an enlarged view of Fig. 1 in the direction of arrow B. figure,
FIG. 5 is a front view illustrating the state of root cutting work. 1... Root cutting device for strawberry seedlings, 2... Connecting part,
8...Support beam, 16...Support arm, 23...Blade body holder, 32...Blade body, 32a...Vertical part, 32
b...Horizontal part, 38...Blade part, 39...Lifter.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A seedling root cutting device used in conjunction with a traction power source such as a tiller, including a connection portion connected to the traction power source, and a connection portion connected to the traction power source. a support beam that projects rearward; a support arm that extends and is fixed at a right angle from the support beam and that can be adjusted by a small angle around the support beam; and a blade that is guided and held so as to be vertically adjustable with respect to the support arm. It is made up of a body holder, a vertical part running approximately vertically, and a horizontal part running horizontally, and is attached at the upper end of this vertical part to the blade holder so as to be able to adjust a minute angle around a horizontal axis perpendicular to the traction direction. A root cutting tool for strawberry seedlings, characterized by comprising a blade body with a blade section provided along the edge. (2) The blade body has a bar-shaped lifter extending rearward and diagonally upward from the rear edge with respect to the traction direction;
A root cutting device for strawberry seedlings according to claim 1 of the utility model registration claim.