JPH0434683Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a sheet fixing device used for mulch cultivation.

Conventional technology The soil surface is covered with sheets such as vinyl film to increase heat retention in the field, improve seed germination and seedling rooting, and prevent soil from flying up during rainfall and weed growth. Covering mulch cultivation is becoming popular, and a mulch device is also provided that uses a shaping plate to ridge the soil and at the same time covers the soil surface after the ridge formation with a sheet.

This mulching device is designed to be used in conjunction with a rotary tilling device normally attached to a tractor, etc., and the method for fixing the sheet after coating is as follows:
A commonly used method is to place soil on top of the sheet in the furrows and use the weight of the soil to hold the sheet in place. Then, as a mechanism for automatically applying soil onto the sheet, for example, one roll of the sheet (loaded into the mulch device) is used to cover each ridge, while a soil-filling disk attached to the mulch device is used. There is a method of adding soil to the hem of the sheet located between the furrows,
A method has been considered in which soil is scooped up in front of the sheet while simultaneously covering two or three furrows with one roll of the sheet, and is then brought up by a conveyor and then dropped onto the sheet between the furrows.

Problems that the invention aims to solve However, among the above fixing methods, the former method uses disks, etc., to fill the soil on both sides of the grooves between the ridges, so the spacing between the ridges needs to be widened to some extent. However, even if we try to narrow the spacing between rows depending on the type of cultivated crops, not only is there a certain limit, but the soil is continuously exposed on the sheets between the rows, which can be used to prevent weeds from growing or to prevent the occurrence of rain. There are problems such as a decrease in the effectiveness of preventing soil from jumping up, and the latter method requires the addition of a soil scooping device or conveyor, which makes the device itself complicated and expensive, and it also prevents the growth of weeds. It's something you can't get.

Means to Solve the Problem Therefore, the present invention aims to provide a mulch device that uses a shaping plate to shape the soil into ridges and at the same time covers the soil surface after the ridge formation with a sheet such as a vinyl film. A groove cutting blade is integrally protruded from the groove cutting blade, and a guide ring is placed close to the rear end edge of the groove cutting blade and immediately behind the groove cutting blade for press-fitting the sheet into the groove formed by the groove cutting blade. This method attempts to solve the above problems by setting the lower end of the groove cutting blade and the lower end of the guide wheel to be approximately at the same height, and by arranging a suppression ring behind the guide wheel. be.

Function: When the present invention is connected to a rotary tillage device attached to a tractor or the like and the field is moved forward, the ridges are shaped by the shaping plate and, at the same time, grooves are formed in the ground between the ridges by the grooving plate. Then, by fixing the leading end of the sheet to the ridge starting end, the sheet is fed out along the ridge, and this fed-out sheet is sequentially placed into the groove formed by the groove cutting plate by the guide wheel. Since the sheet is press-fitted and the groove portion is further crushed by a subsequent pressing wheel, the sheet is fixed in a state where it is sandwiched between the grooves.

Embodiment 1 is a rotary tiller that is vertically movably mounted on the rear of an agricultural tractor (not shown), and a multi-purpose device A is detachably connected to the rear of the rotary tiller via a stay 2. The illustrated multi-purpose device A has a structure that simultaneously shapes and covers four ridges in one process. Reference numeral 3 denotes a shaping plate for forming ridges on soil that has been tilled and crushed by the rotary tillage device 1. This shaping plate 3 has a trapezoidal front shape to match the shape of the ridge a, and is used as a frame for the mulch device A. It is fixed at A′. A groove cutting blade 4 is integrally provided below the bottom 3a of the shaping plate 3. As shown in FIG. 4, this groove cutting blade 4 has sharp parts 4a, 4 on both front and rear ends when viewed from the side.
b has a trapezoidal shape protruding forward and backward from the shaping plate 3, the front sharp part 4a reduces the groove cutting resistance, and the rear sharp part 4b reduces the groove cutting blade 4.
The contact area with the groove is gradually reduced during passage, thereby preventing the groove from collapsing as much as possible. 5,
Reference numeral 5 denotes a sheet that is rotatably supported by the frame A', and this sheet is made of a roll of covering material made of vinyl film, etc., and each sheet 5 is arranged alternately front and rear and left and right. During the feeding operation, each sheet 5 is fed out via the sheet tension wheels 6, 7 with the inner end side thereof wrapped by a predetermined width. The sheet tension wheel 6 is supported above the shaping plate 3, and the sheet tension wheel 7 is supported by the valley portion 3b of the shaping plate 3 via support rods 8 and 9, respectively. Reference numeral 10 denotes a guide ring, and this guide ring 10 is for press-fitting the sheet 5 into the groove formed in the passage of the groove cutting blade 4, and as shown in FIG. It is rotatably provided immediately behind the groove cutting blade 4 in close proximity to the inclined rear end edge of the groove cutting blade 4 . The lower end of the groove cutting blade 4 and the lower end of the guide ring 10 are set to be approximately at the same height, and the guide ring 10 allows the side edge of the sheet 5 to be placed inside the groove formed by the groove cutting blade 4. It is designed to ensure that it is press-fitted all the way to the bottom. Reference numeral 11 denotes a suppressing wheel located rearward of the guide wheel 10 and rotatably provided.

Although the mounting heights of the guide wheel 10 and the suppressing wheel 11 are not shown in the drawings, they may be configured to be adjustable by a suitable adjustment mechanism.

In the above-mentioned configuration, when starting work now, the free end sides of the sheets 5, 5 that have been pulled out rearward are fixed to one end of the field by an appropriate method. Next, when the machine is moved forward and work begins, the soil that has been tilled and crushed by the rotary tillage device 1 is shaped into ridges by the shaping plate 3, and at the same time, grooves are made in the ground between the ridges a by the groove cutting blade 4. (See Figure 1). Further, the sheets 5, 5, which are fed out rearward as the aircraft moves forward, cover the upper surface of the ridge a in multiple strips (strips in this embodiment), but the lap portions at the side edges of the sheets 5 are covered with grooves. The guide wheel 10 provided immediately behind the cutting blade 4 presses and fits into the groove created above (see Fig. 2), and then the subsequent pressing wheel 11 pushes down the groove c from above the sheet 5. . Therefore, the lap portion of the sheet 5 is securely clamped and fixed without exposing the soil (see Fig. 3). Therefore, according to the present invention, it is not necessary to apply weighting soil from above the sheet 5 as in the conventional method.

By the way, in the present invention, the structure is such that the groove cutting blade 4 is integrally provided below the bottom part 3a of the shaping plate 3, and the guide ring 10 for press-fitting the sheet is located close to the rear edge of the groove cutting blade 4. Since it is arranged directly behind the groove cutting blade 4, the overall length of the mulch device A can be shortened, and the mulch device A can be mounted as close as possible to the rotary tilling device 1 side, which allows the tractor main machine to be mounted as close as possible. The longitudinal length of the entire work machine is shortened, which not only eliminates the tendency for the machine head to swell during work, but also makes it easier to move the machine around.

Furthermore, if the groove cutting blade 4 and the guide ring 10 are separated in the front-rear direction, the passage groove of the groove cutting blade 4 may collapse, but by arranging the two groove cutting blades 4 and 10 close to each other, the groove cutting blade 4 can cut the groove. Immediately after forming the groove, that is, before the groove is about to collapse, the side edge of the sheet 5 can be accurately pressed into the groove bottom by the guide wheel 10, and this works in conjunction with the suppressing action of the subsequent suppressing wheel 11. Therefore, the sheet 5 is always fixed in the soil reliably.

Furthermore, the integrated structure of the shaping plate 3 and the groove cutting blade 4 eliminates the need for a separate mounting member such as a stay to support the groove cutting blade 4, and since the groove cutting blade 4 fulfills the rib function of the shaping plate 3, it is advantageous in terms of strength. be.

Effects of the Invention As described above, the present invention provides a mulch device that uses a shaping plate to shape the soil into ridges and at the same time covers the soil surface after the ridge formation with a sheet such as a vinyl film, below the bottom of the shaping plate. A groove cutting blade is integrally protruded from the groove cutting blade, and a guide ring for press-fitting the sheet into the groove formed by the groove cutting blade is provided immediately behind the groove cutting blade, and the lower end of the groove cutting blade and the guide ring are provided. Since the lower ends are set at approximately the same height and a compression wheel is placed behind the guide wheel, the sheet can be securely fixed to the soil surface without exposing the soil to the top surface of the sheet, making it possible to maintain the same height as before. The drawbacks of the seat fixing method, such as soil jumping up during rain, weed growth, and restrictions on ridge spacing, can be solved all at once, and it goes without saying that the structure is simple, there are few failures, and it is lightweight and compact. The overall length of the mulch device can be shortened, and the mulch device can be installed as close as possible to the rotary tilling device, which reduces the front-to-back length of the entire work equipment relative to the tractor main unit, which prevents the machine from becoming head-heaved during work. Not only can this eliminate the problems caused by this, but it also makes it easier to move the aircraft around. In addition, due to the close arrangement of the groove cutting blade and guide ring,
Immediately after forming the groove with the groove cutting blade, that is, before the groove is about to collapse, the side edge of the sheet can be accurately press-fitted to the bottom of the groove using the guide wheel, and this can be combined with the suppressing action of the subsequent suppressing wheel. In addition, the sheet can be fixed in the soil smoothly and reliably at all times. Furthermore, the integrated structure of the shaping plate and the groove cutting blade eliminates the need to separately provide a mounting member for the groove cutting blade, and the groove cutting blade functions as a rib of the shaping plate, which is advantageous in terms of strength.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of the operation, FIG. 4 is an overall side view of the present invention, and FIG. 5 is a partially cutaway rear view of the present invention. In the figure, 3 is a shaping plate, 3a is the bottom of the shaping plate, 4 is a groove cutting blade, 5 is a sheet, 10 is a guide ring, and 11 is a pressure ring.

Claims (1)

[Scope of utility model registration request] In a mulch device that uses a shaping plate to shape the soil into ridges and at the same time covers the soil surface after the ridge formation with a sheet such as a vinyl film,
A groove cutting blade is integrally provided below the bottom of the shaping plate, and the sheet is pressed into the groove formed by the groove cutting blade in close proximity to the rear edge of the groove cutting blade and immediately behind the groove cutting blade. A sheet fixing device for a multi-purpose machine, characterized in that a guide ring to be fitted is provided, the lower end of the groove cutting blade and the lower end of the guide ring are set to be approximately at the same height, and a pressure ring is disposed behind the guide ring. .