JPH0327361Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is based on the method of changing the mounting position of a mounting member integrated with a grooved plate whose cross-sectional shape differs depending on the position on the stay member through the mounting hole. The present invention relates to a paddy field groove cutting machine that can easily form grooves of a desired shape.

[Conventional technology]

The grooving plates of paddy field grooving machines are roughly divided into two types with different cross-sectional shapes depending on the time of operation. In other words, when cutting furrows around three weeks after rice planting, the soil is relatively soft, so we use something with a roughly U-shaped cross section, and when harvesting, we use a harvesting machine such as a combine harvester. Since the soil is very hardened, grooves with a roughly V-shaped cross section are used because they penetrate well into the soil and have less resistance. Therefore, conventionally, (i) two types of grooving plates with approximately U-shaped and approximately V-shaped cross sections are prepared in advance, or (ii) as shown in Fig. 8. The auxiliary plates 2, 2 are fixed to the groove cutting plate 1, which has a substantially U-shaped cross section, with fixing devices 3, 3, such as bolts and nuts, and the lower part is formed into a substantially V-shape, thereby forming a V-shaped cross section. It is possible to create grooves. In addition, (iii) when cutting grooves, in order to be able to respond quickly to the height of the worker, ease of use, etc., and to hold the groove cutting plate at an appropriate angle of contact with the ground, a support is attached to the outer tube that covers the transmission shaft. A weeding machine with an adjustment mechanism has been proposed, which is equipped with an adjustment rod whose mounting angle can be easily adjusted, and a groove cutting plate is connected to the adjustment rod. (For example, see Japanese Utility Model Publication No. 55-25762.) [Problem to be solved by the invention] In the case of (i) in the prior art section mentioned above, two types of groove cutting plates are prepared in advance. Therefore, not only is parts management complicated, but also the purchase price is high for consumers. In case (ii),
This increases the number of parts, leading to a rise in production costs, and because of the assembly method, it is inferior in strength compared to a one-piece structure.Furthermore, it uses bolts and nuts for fastening, making it difficult to assemble. Rust occurs at the attachment points, making it difficult to attach and remove the auxiliary plate, and there is also the risk that the attachment points may break. In case (iii), it is possible to adjust the ground contact angle of the groove cutting plate, but when cutting grooves, especially when cutting on dry and hardened ground, the adjustment rod may become slightly unstable due to the resistance of the ground. It is expected that the machine will swing or displace unexpectedly, and as a result, the initial ground contact angle will change, making it difficult or even impossible to cut a groove in the desired shape, resulting in a situation where work will have to be interrupted. There are issues such as concerns.

This invention was proposed in view of these problems, and its purpose is to avoid unnecessary complication of the structure of the grooving plate itself, and to avoid the grooving plate once set at a predetermined ground contact angle. While grooving the board, always
It is an object of the present invention to provide a paddy field trench cutting machine that can maintain the ground contact angle at a particular ground contact angle and easily adjust the ground contact angle as necessary.

[Means to solve the problem]

In order to achieve the above-mentioned purpose, the paddy field groove cutting machine according to the present invention rotatably supports a rotor at the front end of an outer tube that covers a transmission shaft driven by an engine, and has a rotor whose setting position can be adjusted at the rear of the rotor. In a paddy field grooving machine equipped with a grooving plate, the upper end is fixed to a proper position of the outer pipe, and a first mounting hole is bored on the engine side and in the stay member that slopes and protrudes downward. On the other hand, the groove cutting plate has an inverted "he" shape in which the middle part along the longitudinal direction of the bottom edge protrudes downward, and the middle part and the rear part are integrated into a V-shaped cross section and a U-shaped cross section, respectively. A second mounting hole that can be adapted to the first mounting hole is bored near the upper end of the mounting member, the lower end of which is fixed to the inner front side of the grooved plate. By selectively inserting and fastening the groove plate into the two mounting holes using fasteners, it is possible to select the cross section of the grooved plate at the point where it contacts the ground.

〔Example〕

Embodiments of this invention will be described with reference to FIGS. 1 to 7. First, in FIGS. 1 to 6 of the first embodiment, a transmission shaft (not shown) driven by engine E is coated. The front end of the outer tube 5 (first,
In each of Figures 4, 6, and 7, the left side is the front, and the right side is the rear. ), the rotor 12 is rotatably supported by a suitable support means so that the rotor 12 can be rotated through the rotation of the transmission shaft, and at an appropriate position on the side edge of the outer tube 5, on the engine E side, The upper end of the holding piece _S1 , which is a flat plate, is tilted downward and fixed by fasteners such as _screws or rivets, or by welding. Ko"
A pair of first mounting holes h, h are bored along the vertical direction of the support piece 6 in the shape of a square, and a grooved plate 7 attached to the support piece 6 is formed at the bottom of the pair of side plates 7', 7'. The middle part along the longitudinal direction of the edge protrudes toward the ground 11 and is formed in an inverted "he" shape, and the cross section of the rear part is approximately U-shaped.
The cross section of the central portion is integrally formed into a substantially V-shape by welding. Then, the front side of the side plates 7', 7' is tilted upward toward the inner front side, and the lower end of the mounting member 8 is fixed by welding or a fastener such as a screw or rivet,
Two pairs of second mounting holes a, a, b, b having different heights at set positions along the vertical direction are bored in the upper end of the mounting member 8, while the upper part of the mounting member 8 is connected to the side plate 7',
7', and connect one of the second mounting holes a, a, b, b to the first mounting holes h, h with a plurality of fasteners made of bolts, nuts, etc. By tightening the fittings j and j, the cross section of the groove cutting plate 7 at the point of contact with the ground 11 is made into a U-shape or a V-shape.
It can be selected literally. Note that the holding piece S ₁
and the support piece 6 are referred to as a stay member.

In FIG. 7 of the second embodiment, one circular first mounting hole and one oval first mounting hole e are formed below the stay member S ₂ , and above the mounting member 18 fixed to the groove cutting plate 17 . a plurality of recesses K ₁ , each circular;
One arc-shaped second mounting hole i, k forming K ₂ , K ₃ is drilled, and the through hole d of the first mounting hole is drilled.
Insert the bolt 19 into the second mounting hole i, and tighten the nut n.
and the recesses of the elongated hole e of the first mounting hole and the circular arc-shaped through hole k of the second mounting hole.
Insert the bolt 20 into either K ₁ , K ₂ , or K ₃ ,
Tighten with a nut V, and set the center or rear end of the bottom edge of the groove cutting plate 17 to be able to contact the ground 11. Note that the bolt 19 and nut n are also
and nut V are referred to as fasteners t and u, respectively.

In the figure, 9 is a stand, 10 is a handle, 13 is a resistance plate, C is a rotor cover, and θ ₁ and θ ₂ are grounding angles of the groove plate 7 with respect to the ground 11.

[Effect]

Since this idea has the above-mentioned configuration, the first
In the embodiment, when cutting the grooves about three months after rice planting, the first mounting holes h, h of the support piece 6 are connected to the second mounting holes b,
b, and when inserting and tightening the fasteners j, j, the side plates 7', 7' of the groove cutting plate 7 have a cross section approximately U-shaped with respect to the ground 11, as shown in Fig. 3. When cutting grooves just before harvesting, align the first mounting holes h, h with the second mounting holes a, a, and tighten them here, as shown in Figure 4. Kimono j, j
When inserted and fastened, the side plates 7', 7' have a cross section of approximately V with respect to the ground 11, as shown in FIG.
Contact under the shape. In this way, the operator can use the same groove cutting plate 7 to cut the cross section into a substantially U-shape or a substantially V-shape as necessary.
Can cut letter-shaped grooves.

In the second embodiment, the bolt 19 is inserted into the through hole d of the first mounting hole and the through hole i of the _second mounting hole to serve as a fulcrum. Insert the bolt 20 into the elongated hole e and one of the recesses K ₁ , K ₂ , and K ₃ of the arc-shaped through hole k of the second mounting hole, and tighten the bolt 1 with the nuts n and V, respectively.
When fastening 9 and 20, a groove with a substantially U-shaped or V-shaped cross section can be formed, as in the first embodiment.

〔effect〕

With this invention, even if the mounting position of the groove cutting plate to the stay member is changed, the height of the outer tube from the ground does not change, so the worker can always perform groove cutting work in a constant posture, and can cut the groove quickly. In order to cut two types of grooves without feeling fatigued, it is necessary to prepare two types of groove cutting plates in advance, or to temporarily attach an auxiliary plate to the groove cutting plate. Compared to the conventional grooving work that used to involve cutting, two types of grooving can be done with an extremely simple operation of simply changing the mounting position of the mounting member to the stay member. Because they are connected, there is no risk of strength loss, so there is no risk of parts being cut or damaged when cutting grooves in dry and hardened ground, and it is also easy to change the mounting position of the mounting member to the stay member. This can be easily done by tightening or loosening the fastener inserted into the second mounting hole, which is convenient for the operator, and also prevents the groove cutting plate from swinging or displacing unexpectedly during the groove cutting operation. Since there are no holes, it is possible to perform reliable groove cutting work, and since the structure itself is simple, it has practical benefits such as being vertical and being able to be manufactured at low cost.

In the second embodiment, due to the presence of an appropriate number of recesses, the desired position of the grooving plate relative to the stay member can be set over a wide range by simply loosening the fastener, and the grooving plate can be rotated to select the desired position. This is convenient for workers.

[Brief explanation of the drawing]

Fig. 1 is a front view of the groove cutting plate in the first embodiment when it is attached to the stay, Fig. 2 is a view taken along the - line in Fig. 1, and Fig. 3 is a cross-sectional view taken along the - Figure 4 is a front view of the groove cutting plate when it is attached to the stay member at a different position, Figure 5 is a sectional view taken along the - line in Figure 4, and Figure 6 is a sectional view taken along the - line in Figure 4.
The figure is a perspective view of the proposed product, FIG. 7 is a perspective view of the groove cutting plate and stay member in the second embodiment when separated, and
The figure is an explanatory diagram of a conventional creating means having a V-shaped cross section. 5... Outer pipe, 7, 17... Groove plate, 8, 18...
...Mounting member, 11...Ground, 12...Rotor, E
... Engine, 6, S ₁ , S ₂ ... Stay member, a,
b, i, k...second mounting hole, d, e, h...first mounting hole, j, t, u...fastener, _K1 , _K2 , _K3 ...
...concavity.

Claims (1)

[Claims for Utility Model Registration] (1) A rotor is rotatably supported at the front end of an outer tube that covers a transmission shaft driven by an engine, and a grooved plate whose setting position can be adjusted is provided at the rear of the rotor. In the paddy field groove cutting machine, the upper end is fixed to a proper position of the outer pipe 5, and the stay member S ₁ , 6 is inclined and protrudes downward toward the engine E side.
First mounting holes h, h, d, and e are bored in S ₂ , while the grooved plates 7 and 17 have an inverted "he" shape in which the middle part along the longitudinal direction of the bottom edge protrudes downward. The middle part and the rear part each have a V-shaped cross section,
The first mounting holes h, h, d, and e are provided near the upper ends of the mounting members 8, 18, which are integrally formed in a U-shape and whose lower ends are fixed to the inner front side of the grooved plates 7, 17. Compatible second mounting hole a,
Drill holes a, b, b, i, k, and first mounting holes h,
h, d, e and second mounting holes a, a, b, b, i,
Selective insertion with fasteners j, t, u with k
A paddy field grooving machine in which the cross section of the grooving plates 7, 17 at their contact points with the ground 11 can be selected by tightening. (2) The first mounting holes d and e consist of a circular through hole and a long hole, and the second mounting holes i and k consist of a circular through hole and a plurality of recesses around this through hole. K ₁ , K ₂ ,
The paddy field trench cutting machine according to claim 1, which is a utility model registration, and comprises a semicircular arc-shaped through hole with K ₃ formed on the side edge.