JPH10215690A - Seedling raising tray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To thicken the roots of raised seedlings, to excellently wrap the roots and to hardly destroy ridging at the time of detaching the raised seedling from a cell. SOLUTION: Relating to this seedling raising tray for which a plurality of cells for raising the seedlings are successively arranged, the cell 12 is a hollow cylindrical body provided with an opening part 16 whose cross-sectional shape is almost square on an upper part and provided with a bottom part 18 whose cross-sectional shape is almost circularly closed on a lower part for which a sidewall part 20 for connecting the opening part 16 and the bottom part 18 is constituted of a curved surface whose cross-sectional shape is smoothly shifted to the almost circular shape as approaching the bottom part 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling raising tray, and more particularly to a seedling raising tray used for growing seedlings such as vegetables.

[0002]

2. Description of the Related Art As a conventional seedling raising tray, for example, there is a seedling raising tray disclosed in Japanese Utility Model Registration No. 30222696.

In this seedling raising tray, a plurality of truncated hollow quadrangular pyramidal cells formed so that the upper surface is opened and expanded, are connected in series, and a drain hole as a through hole is formed at the center of the square bottom of each cell. In addition to this, a concave groove portion having a uniform protruding depth is formed in an annular shape in an outer peripheral portion of the drain hole.

[0004] However, in the conventional seedling raising tray described above, the bottom is formed in a square shape and the corner has corners at the four corners. There is a problem that the roots become thinner and the wrapping around the roots is not good.

[0005] Further, as described above, the roots of the grown seedlings are thin and their root windings are not good, so that when the grown seedlings are detached from the cells, the cultivation soil collapses, and the subsequent work There was a problem that the property was not good.

Further, since a concave groove portion having a uniform protruding depth is formed in an annular shape in the outer peripheral portion of the drain hole, a slight gap is formed between the lower surface of the drain hole and the grounding surface of the seedling raising tray. That is, the overhang of the root from the drainage hole is suppressed, but since the protruding depth of the annular concave groove is uniform, the annular concave groove contacts the ground surface of the seedling raising tray without opening a gap. As a result, the flow of air from the outside into the gap is hindered, and the air permeability in the gap is poor, so that there is a problem that the overhang of the root from the drain hole cannot be effectively suppressed. Was.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art,
The purpose is to make the roots of the grown seedlings thicker and to make the roots better.
Moreover, it is an object of the present invention to provide a seedling raising tray in which cultivation is hardly broken when the grown seedling is detached from the cell.

It is another object of the present invention to provide a seedling raising tray capable of effectively preventing roots from protruding from drain holes.

[0009]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 of the present invention is directed to a seedling raising tray having a plurality of seedling raising cells, wherein the cells have a cross section at the top. While having a substantially square opening,
A lower portion has a bottom closed in a substantially circular cross-section, and a side wall connecting the opening and the bottom is formed by a curved surface whose cross-section smoothly transitions to a substantially circular shape toward the bottom. It is a tubular body.

Therefore, according to the first aspect of the present invention, since the roots are grown along the curved surface on the bottom side of the cell, the roots are grown thicker and the root winding is improved, and the growth is improved. When detached seedlings are removed from the cell, the cultivation becomes difficult to collapse.

In this case, a drain groove is formed in the bottom of the cell as described in the second aspect of the present invention, and a concave groove protruding downward at an outer peripheral portion of the drain hole. And the projection depth of the concave groove may not be uniform.

Therefore, according to the second aspect of the present invention, since the protruding depth of the concave groove is not uniform, the concave groove portion is grounded with a gap from the ground surface of the seedling raising tray. Therefore, air from the outside flows into the gap formed between the lower surface of the drainage hole and the ground contact surface of the seedling raising tray, and air permeability in the gap is ensured. Overhang can be effectively suppressed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a seedling raising tray according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of an embodiment of a seedling raising tray according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a right side of FIG. A plan view is shown.

That is, the seedling raising tray 10 can be formed, for example, by integral molding of a synthetic resin sheet having a thickness of 0.4 mm to 0.5 mm, and is constituted by a plurality of cells 12 connected in series.

Here, the seedling raising tray 10 is, for example, as shown in FIG.
As shown in FIG.
The number of cells 12 can be configured.

The overall dimensions are, for example, as shown in FIGS.
As shown in the figure, height 300 mm, width 595 mm, height 5
It can be 2.5 mm.

Next, the configuration of the cell 12 will be described in detail with reference to a cross-sectional view of the cell 12 shown in FIG. 4 and a plan view of the cell 12 excluding an edge portion 14 described later shown in FIG. The cells 12 have an edge 14 and are connected to each other via the edge 14.

Here, the cell 12 has an opening 16 having a substantially square cross section at the upper part, and a bottom part 18 having a substantially circular cross section at the lower part. Is a hollow cylindrical body having a curved surface whose cross-sectional shape smoothly transitions to a substantially circular shape as it goes to the bottom. The bottom 18 of the cell 12 has a drainage hole 22
Are formed. In addition, a concave groove 24 protruding downward is formed in an outer peripheral portion of the drain hole 22 formed in the bottom 18 of the cell 12. The protruding depth of the concave groove portion 24 is not uniform, and a cross-shaped portion 24a having a shallow protruding depth is formed in a cross shape with the drain hole 22 as a center.

In the above configuration, the seedling raising tray 10
In order to grow seedlings, first, cultivation soil is put into the cell 12, seeds are sown, placed on the floor of a greenhouse or the like, and water is appropriately supplied to germinate and grow seedlings. It is.

Here, when the soil is put into the cell 12,
Since the cell 12 has the substantially circular bottom portion 18, when the size of the cell is similar to that of the conventional seedling raising tray having a rectangular bottom portion, that is, when the cell 12 has one of the openings 16, The size of the side and the size of one side of the opening of the cell of the conventional seedling raising tray are the same,
If the size of the diameter of the seedling and the size of one side of the bottom of the cell of the conventional seedling raising tray are the same, the amount of soil to be cultivated is smaller than that of the conventional seedling raising tray, so that the production cost should be reduced Can be.

In the process of growing the seedlings, the roots are grown along the curved surface on the bottom portion 18 side of the cell 12, so that the roots are grown thicker and the root winding is improved.

Further, since the root winding is improved as described above, when the grown seedling is detached from the cell 12, the cultivated soil is less likely to collapse.

Moreover, since the opening 16 of the cell 12 has a substantially square shape, when the grown seedling is detached from the cell 12, the cultivated soil located near the opening 16 has a substantially square cross section. Since the shape has a shape, the cultivation soil located near the opening 16 is less likely to collapse.

Therefore, in the state where the grown seedlings are detached from the cells 12, the whole cultivated soil is less likely to collapse, so that the workability after detaching the grown seedlings from the cells 12 is remarkably improved.

When the grown seedling is detached from the cell 12, the side wall 20 of the cell 12 is formed by a curved surface whose cross-sectional shape smoothly changes to a substantially circular shape toward the bottom. Since the side wall portion 20 can be deformed by a slight pressure such as pressing by a finger of an operator, the detachment of the seedling from the cell 12 can be performed smoothly.

By the way, in the cell 12, the bottom 18
Is formed with a concave groove 24 and a cross-shaped portion 24a, so that the irrigation water supplied into the cell 12 is
And since it accumulates in the cross-shaped part 24a, it is excellent in water retention and the frequency of irrigation can be significantly reduced.

When the cell 12 is placed on a floor 100 (see FIG. 4) such as a greenhouse, the concave groove 2
4 and the floor surface 100
Between the lower surface of the drain hole 22 and the floor surface 100, air from the outside flows through the gap G, and As a result, the overhang of the root from the drain hole 22 can be effectively suppressed.

In the above-described embodiment, the seedling raising tray 10 has been described as being formed by integral molding of a synthetic resin sheet. However, it is needless to say that the present invention is not limited to this. It is preferable to have a structure and to be deformed by a predetermined pressure.

In the above-described embodiment, in order to make the projection depth of the concave groove 24a non-uniform, the cross-shaped portion 24a having a shallow projection depth is formed in a cross shape around the drain hole 22. However, the present invention is not limited to this. Of course, in order to make the protrusion depth of the concave groove portion 24a non-uniform, a portion having a small protrusion depth may be provided in an appropriate shape.

[0031]

According to the present invention, as described above, the roots of the grown seedlings can be made thicker and the roots can be wrapped well. It has an excellent effect that the cultivation soil can be made harder to collapse when it is detached from the soil.

Further, since the present invention is configured as described above, it has an excellent effect that the overhang of the root from the drain hole can be effectively suppressed.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of a seedling raising tray according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a sectional view of a cell.

FIG. 5 is a plan view of a cell without an edge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Nursery tray 12 Cell 14 Edge 16 Opening 18 Bottom 20 Side wall 22 Drainage hole 24 Concave groove 24a Cross-shaped part 100 Floor surface

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Yoshinori Inoue 5-1, Katayoshi Kajiyashiki, Shiwa-cho, Shiwa-gun, Iwate Prefecture Inside the Iwate Prefecture Economic and Agricultural Cooperative Federation Horticultural Education Seedling Center

Claims (2)

[Claims] 1. A seedling raising tray in which a plurality of seedling raising cells are connected in series, wherein the cells have an opening having a substantially square cross section at an upper portion and a bottom portion having a substantially circular cross section at a lower portion. A seedling raising tray, wherein a side wall connecting the opening and the bottom is a hollow cylindrical body having a curved surface whose cross-sectional shape smoothly changes to a substantially circular shape toward the bottom. 2. The seedling raising tray according to claim 1, wherein a penetrating drain hole is formed in the bottom of the cell, and an outer peripheral portion of the drain hole formed in the bottom of the cell is downwardly formed. A seedling tray, wherein a protruding concave groove is formed, and the protruding depth of the concave groove is not uniform.