JPS6224480Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tobacco stem drying cap for use in drying the stems of tobacco leaves to prevent the occurrence of whitish leaves and rapidly drying leaves.

[Prior Art] In the tobacco cultivation industry, the harvesting and drying of tobacco leaves is the most intensive labor involved in tobacco cultivation, and labor saving is an old and new challenge.
As a solution to this problem, trunk pruning, trunk drying, and even multi-leaf trunk drying are being strongly promoted.

That is, as the tobacco grows, several of the middle and lower leaves,
For example, the lower leaves and part of the middle leaves are removed each time and dried by continuous drying, but the upper middle leaves,
True leaves and leaves are cut at the ripening stage, hung upside down on trunk drying nets or wires at intervals of 10 to 20 cm, and dried in the sun in a facility such as a greenhouse.

However, in this stem-drying, the top three or so leaves in an upside-down state tend to become blurry and dry out quickly, which causes a decline in the quality of the dried leaf tobacco. When the trunk is hung, the upper leaves are middle and lower leaves that have already matured and are prone to withering.Moreover, because they are directly exposed to sunlight, they tend to dry out quickly due to high temperatures and low humidity, and are also bleached by ultraviolet rays, resulting in pale white leaves. Easy to occur.

Currently, as a measure to prevent the occurrence of abnormal leaves when drying tobacco leaves, an improved special drying chamber has been developed that suppresses the harmful effects of sunlight and its ultraviolet rays with a double coating structure consisting of an ultraviolet cut film and an aluminum evaporated film. It is put into practical use.

[Problems to be solved by the invention] The above-mentioned special drying chamber used for drying leaf tobacco stems has a double coating structure consisting of an ultraviolet cut film and an aluminum vapor-deposited film, so it cannot be used on cloudy or rainy days. When the amount of sunlight is low, the aluminum vapor-deposited film must be removed, making it difficult to maintain and manage the temperature and humidity necessary for drying the tobacco, and the equipment costs are high. The spread of chambers is slow. Therefore, it has been desired to develop a simple means or device that is easy to use and that can effectively prevent the rapid drying of leaves and the occurrence of white blur.

[Means for solving the problem] The present invention is a trunk drying cap that meets these demands, and is made of a material that blocks ultraviolet rays of 380 nm or less and has a visible light transmittance of 30% or more. A capping hole is provided at the center of a circular or polygonal sheet, and the sheet is divided into large blades and small blades by a plurality of cuts directed from the periphery toward the center. This is a trunk drying cap for leaf tobacco.

Hereinafter, the present invention will be explained in detail based on examples.

Figure 1 is a plan view showing an embodiment of the trunk drying cap of the present invention, in which a cap holding hole 1 is inserted through the base of a cut tobacco trunk in the center of a circular plastic sheet with a diameter of approximately 20 to 40 cm. is perforated. The shape of the cap fixing hole 1 may be a circular hole that allows the tobacco stem to pass through, but it is preferable to have a star-shaped or gear-shaped uneven shape so that it can be easily locked to the stem.
Alternatively, it may simply be a large number of radial punch lines.

The stem drying cap of the present invention has a plurality of notches 4 in the sheet body from the peripheral edge 2 toward the cap fixing hole 1 in the center. It is alternately divided into blades 3.

Materials used for the trunk drying cap of this invention include plastics such as polyethylene, polypropylene, polyester resin, and vinyl chloride resin, as well as nonwoven fabrics, waterproof paper, etc., as long as they provide the necessary light transmittance. Can be done. In order to ensure that the large blade 2 hangs down appropriately and the small blade 3 does not hang down too much during use, a hard film or sheet with an appropriate thickness is used. For example, in the case of a polyester resin sheet, the thickness is 75 μm. is appropriate.

The film or sheet used is coated with or kneaded with an ultraviolet absorber in order to block ultraviolet rays with a wavelength of 380 nm or less. Examples of such sheet materials include 6Lite 390 from Taiyo Kogyo Co., Ltd. Polyester resin sheets are commercially available under the name

The film or sheet used in the trunk drying cap of the present invention has a transmittance of 30% or more for visible light of 380 nm or more. By suppressing the transmittance of visible light to preferably 80% or less, it is possible to prevent the occurrence of high temperature and low humidity.
Particularly preferred transmittance is 40-70%. Adjustment of the transmittance of visible light can be achieved by any method, such as vapor deposition of a metal such as aluminum, application of a reflective or light absorbing agent,
Alternatively, there may be kneading of metal powder, pigment, filler, etc.

It is also advantageous for the trunk drying cap of the present invention to scatter transmitted light, and it is preferable to use, for example, a satin-finished sheet or a textured sheet. By using a non-woven fabric made of plastic fibers containing UV absorbers,
It is also possible to obtain the required visible light transmittance at the same time as obtaining scattered light.

[Effect]

As shown in FIG. 2, the stem drying cap of the present invention is attached to the stem base 7 of a cut tobacco tree hung upside down by fitting a cap fixing hole therein. Incision 6 in the stem base 7 of tobacco leaf with stem drying cap attached
When hung upside down by hooking it on the wire 8, the large blade 2 and the small blade 3, which are divided by the notch 4 in the sheet body, will bend downwards appropriately depending on their respective shapes and weights. Due to the difference in amount, a step is created between the large blade 2 and the small blade 3, and the gap between the kneading steps maintains air permeability.

When tobacco leaves with stem-drying caps attached are hung on stem-drying wires 8 or nets at intervals of 15 to 20 cm and lined up for drying, adjacent caps overlap each other, increasing the UV blocking effect and reducing the light intensity of the caps. Due to the nature and air permeability, as well as the scattering of light due to diffused reflection from the overlap of the caps, it is difficult to cause high temperatures and low humidity due to localized heat build-up, and the occurrence of abnormal leaves such as blurred white leaves and rapidly drying leaves is prevented. . If the trunk drying cap itself has light scattering properties due to graining or satin finishing, uniform irradiation is performed without uneven distribution of irradiation depending on the direction of incidence of sunlight.

[Effects of the invention] The effects of the tobacco stem drying cap of the invention can be listed as follows based on its advantages.

(1) The trunk drying cap of the present invention can be used simply by attaching the cap to the cut tobacco trunk, and the operation does not require any skill and can be easily carried out by people of all ages and women. Moreover, it is not affected by the weather and temperature, and the occurrence of white blurred leaves and rapidly drying leaves is prevented.

(2) Leaf tobacco can be dried in a normal house under normal management without requiring a special drying room, and equipment and materials are economical. The trunk drying cap of the present invention can be used repeatedly and has a durability of 5 to 7 years.

(3) The work of attaching the caps does not require a significant increase in labor due to the work of drying the trunk, and on the contrary, the work of sorting out abnormal leaves is reduced, resulting in an overall reduction in labor.

(4) By reducing the occurrence of abnormal leaves, productivity and products will improve, improving profitability.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the trunk drying cap of the present invention, and FIG. 2 shows the trunk drying state with the trunk drying cap attached.

Claims (1)

[Claims for Utility Model Registration] (1) A circular or polygonal sheet made of a material that blocks ultraviolet rays of 380 nm or less and has a visible light transmittance of 30% or more, with a cap hole 1 in the center. The sheet is formed into large blades 2 and small blades 3 by a plurality of cuts 4 directed from the periphery to the center.
A stem drying cap for leaf tobacco characterized by being divided into two parts. (2) The tobacco stem drying cap for leaf tobacco according to claim (1), which has a visible light transmittance of 40 to 70%. (3) The sheet scatters transmitted light;
A stem drying cap for leaf tobacco according to claim 1 or 2 of the utility model registration claim.