JP4074710B2 - Seedling protective cover - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylindrical seedling protective cover having both ends opened and used on a planted seedling.
[0002]
[Prior art]
Conventionally, in order to prevent saplings planted in forests etc. from being eaten by animals such as deer, moths and moths (beast damage), until the planted saplings grow to some extent, A method of covering and growing a translucent cylindrical seedling protective cover is employed.
[0003]
As this seedling protective cover, a synthetic resin sheet made of polypropylene or the like is punched into a predetermined shape, and at the same time, a predetermined shape synthetic resin sheet body in which a crease line is formed is folded at the crease line forming position, Known are those in which a predetermined portion is fixed and a cylindrical shape having a polygonal cross section with both ends opened is known.
In particular, in Japan, where there are many mountainous areas, many of these seedling protective covers have a regular even-numbered square shape such as a regular hexagon that can be transported in a folded state so as not to be bulky.
[0004]
[Problems to be solved by the invention]
By the way, the seedling protective cover having a polygonal cross-section has an advantage that it is not bulky during transportation, but has a problem that it takes time and effort during manufacture.
That is, since the process includes a step of punching a synthetic resin sheet into a predetermined shape and simultaneously forming a crease line, a step of folding, and a step of fixing a predetermined portion, the number of steps is inevitably increased, and a step of bending, etc. There is a problem that there is a process that must be relied on manually, and when punching out a synthetic resin sheet, a crease line is formed at the same time, so in a state where multiple synthetic resin sheets are stacked There was a problem that the method of punching could not be adopted and it was not suitable for mass production.
[0005]
Furthermore, the seedling protective cover as described above has a problem that it is inferior in workability when it is installed so as to cover the seedling.
That is, in the manufacturing process as described above, the number of places to be bent is the minimum necessary, specifically, only two places are folded and the part to be fixed is superposed, then the part is fixed, and thus In order to pack the obtained seedling protective cover and transport it to the site (place where the seedling was planted), when installing it on site, the section that was not bent in the above manufacturing process is folded and the cross-sectional shape is a regular hexagonal cylinder However, it is very difficult to fold in the forest where there is no fold and no work table etc. in the part that is not bent during the manufacturing process. Is required.
On the other hand, it is not impossible to crease all the crease line forming parts during the manufacturing process, but there is a problem that the labor in the manufacturing process further increases, and the creases are added in this way. In such a case, there is a problem that packing work becomes difficult.
[0006]
The present invention has been made to solve the above-described problems, and provides a seedling protective cover that reduces the number of steps in the manufacturing process and has good workability during installation.
[0007]
[Means for Solving the Problems]
The seedling protective cover of the present invention made to solve the above problems has a plurality of fastening pieces at one end, and allows the fastening pieces to be inserted into positions corresponding to the fastening pieces near the other end. , have a slit for locking,
Each clamping piece of the synthetic resin sheet, which was assembled into a cylindrical shape by inserting, engaging in corresponding slit,
Between each slit provided in the vicinity of the end portion of the synthetic resin sheet body, an insertion portion for inserting a portion between the tightening pieces at the other end portion having the plurality of tightening pieces is formed. Is.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific examples of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing an example of a synthetic resin sheet body for obtaining the seedling protective cover of the present invention, and FIG. 2 is a view showing a state in which the synthetic resin sheet body shown in FIG. 1 is assembled. . 3 is a view showing a seedling protective cover obtained by assembling the synthetic resin sheet body shown in FIG.
In the figure, reference numeral 1 denotes a seedling protective cover, reference numeral 10 denotes a synthetic resin sheet, reference numerals 12A to E denote fastening pieces, and reference numerals 11A to E denote slits for inserting and locking the fastening pieces 12A to E. .
[0009]
The synthetic resin sheet 10 is made of synthetic resin such as polypropylene and polyethylene, and various kinds of materials such as an antistatic agent, an ultraviolet absorber, a hindered amine light stabilizer, an antioxidant, a lubricant, an antiblocking agent, an inorganic filler, and a colorant. A synthetic resin composition obtained by adding additives as necessary is obtained by punching out a synthetic resin sheet obtained by extruding from a T die of an extruder into a predetermined shape.
[0010]
The synthetic resin sheet body used in the present invention has a plurality of tightening pieces at one end as in the synthetic resin sheet 10 shown in FIG. 1, and corresponds to each tightening piece near the other end. A slit for inserting and locking the tightening piece is provided at a position to be engaged.
The synthetic resin sheet 10 shown in FIG. 1 also has five fastening pieces 12A to E and slits 11A to E for inserting and locking the fastening pieces 12A to E.
[0011]
The tightening pieces 12A to 12E in the synthetic resin sheet body 10 shown in FIG. 1 have a width w ₂ that is equivalent to the width w ₁ of the slits 11A to 11E for inserting and locking the same, Further, two locking pieces protruding in a right triangle shape are formed at both ends. On the other hand, the slits 11A to E are constituted by two slits formed so as to correspond to the locking pieces provided on the fastening pieces 12A to E.
Then, in order to assemble the synthetic resin sheet body 10 shown in FIG. 1, the fastening pieces 12A to 12E are inserted into the slits 11A to E, respectively, as shown in FIG. Each of the locking pieces formed at both ends of the fastening pieces 12A to 12E is locked at both ends of each slit constituting the .about.E, and the synthetic resin sheet body 10 is a cylindrical seedling as shown in FIG. The protective cover 1 is obtained.
[0012]
Further, the synthetic resin sheet member 10 shown in Figure 1, in addition to the clamping piece 12A~E and slit 11A~E described above, between each slit, the clamping piece 12 A-E of the synthetic resin sheet 10 Insertion portions 11a to 11d for inserting portions between the tightening pieces at the end portion on the side to be provided are formed. Then, the clamping piece 12A~E as described above, when the allowed locked inserted-engagement with the slit 11A～E, at the end of the side having the clamping pieces 12 A-E, the portion is between the clamping piece, this Inserted into the insertion portions 11a to 11d. The insertion portions 11a to 11d in the synthetic resin sheet body 10 shown in FIG. 1 are constituted by substantially U-shaped slits provided at predetermined positions of the synthetic resin sheet body 10.
[0013]
In the seedling protective cover of the present invention, the significance of forming the insertion portion as described above is that the above-described fastening pieces and the slits for inserting and locking the fastening pieces are formed between the fastening pieces. Since there is a problem that the part which becomes becomes parabolic, it exists in suppressing it.
That is, by inserting a portion between the fastening pieces of the heel that would otherwise float in a parabolic shape into the insertion portion, the lifting of the portion is suppressed.
[0014]
In addition, although the formation positions of the slits 11A to E and the insertion portions 11a to 11d in the synthetic resin sheet body 10 shown in FIG. 1 are staggered, it is the same as that of the synthetic resin sheet body 10 shown in FIG. When the slit (including the slit for forming the insertion portion) is directly formed in the synthetic resin sheet body, if these are in a straight line, the strength of the slit forming portion becomes weak, and the synthetic resin sheet This is because the sheet body is easily bent at the portion. That is, like the synthetic resin sheet body 10 shown in FIG. 1, by dispersing the slits so that the portions where the slits are not formed are in a straight line, the synthetic resin sheet body is suppressed in strength reduction and bent. Is suppressed. Further, in the synthetic resin sheet body 10 shown in FIG. 1, the lengths of the fastening pieces 12A to 12E are also changed in accordance with the formation positions of the slits 11A to E for inserting and locking the fastening pieces 12A to 12E (fastening pieces 12A). , C, E has L _a, clamping piece 12B length, D is there as is L _B length), at the end having a clamping piece of the synthetic resin sheet 10, the position of the part to be between clamping pieces However, the fastening pieces of the synthetic resin sheet body 10 corresponding to 11b and d formed at positions far from the end on the side not having the fastening pieces are changed according to the formation positions of the insertion portions 11a to 11d. The position of the portion between the tightening pieces in the end portion having the tightening pieces is changed by forming the tongue-like portions 12a and 12b at the end portions having the tightening pieces ).
[0015]
Further, in the case where the fastening piece is formed integrally with the synthetic resin sheet body as in the synthetic resin sheet body 10 shown in FIG. 1, the corner C formed by the end portion of the synthetic resin sheet body is It is desirable to have a taper shape as shown in FIG. 4A or an arc shape as shown in FIG. That is, if the corner C is formed at a right angle, the corner C is easily torn from the corner C. Therefore, in order to suppress the corner C, the corner C as shown in the tightening piece 12 'in FIG. It is desirable to form a taper shape, or to form the corner portion C in an arc shape like the tightening piece 12 ″ in FIG.
[0016]
Next, another specific example of the present invention seedling protective cover shown in FIG. 5 will be described.
In the example shown in FIG. 5, like the synthetic resin sheet 10 shown in FIGS. 1-3, five fastening pieces 22A-E (however, the fastening pieces 22C-E are not shown) and the corresponding slits 21A. -E (however, slits 21C-E are not shown) are made of a synthetic resin sheet 20 formed thereon.
[0017]
In the example shown in FIG. 5, the slits 21 </ b> A to E are not provided directly on the synthetic resin sheet body 20 as in the synthetic resin sheet body 10 shown in FIGS. By attaching the portion to the synthetic resin sheet body 20 by means such as ultrasonic welding or adhesion using an adhesive, slits for inserting and locking the tightening pieces 22A to 22E are formed. .
Moreover, in the example shown in FIG. 5, insertion part 21a-d (however, insertion part 21c-d is illustrated) by forming a tongue-like part between each slit of the strip | belt-shaped member 21 which formed slit 21A-E. Omitted).
[0018]
In order to assemble the synthetic resin sheet body 20 into a seedling protective cover, the fastening pieces 22A to E are respectively inserted into the corresponding slits 21A to E as in the case of the synthetic resin sheet body 10 shown in FIGS. Are inserted and locked, and at the end portion having the fastening pieces 21A to 21E, the portion between the fastening pieces is inserted into the insertion portions 21a to 21d.
[0019]
If the slit is not directly provided in the synthetic resin sheet body as in the example shown in FIG. 5, there is no decrease in the strength of the synthetic resin sheet body. It is not necessary to alternate the positions of the slits as in the example. Further, it is not necessary to change the length of the fastening piece or to form a tongue-like portion for changing the position of the end portion of the synthetic resin sheet body.
Also in the example shown in FIG. 5, the slits A to E are formed in a straight line, and the fastening pieces 22A to E have the same length, and the end portion is located at the end where the fastening pieces are provided. The tongue for changing is not formed.
[0020]
As in the synthetic resin sheet body 20 shown in FIG. 5, a synthetic resin sheet body in which slits are formed in a band-shaped member separate from the synthetic resin sheet body without directly providing slits in the synthetic resin sheet body. When used, the process of fixing the belt-shaped member increases, but in terms of strength, a synthetic resin sheet body in which a direct slit is formed like the synthetic resin sheet body 10 shown in FIGS. Better than the case.
On the contrary, when using a synthetic resin sheet body in which a direct slit is formed like the synthetic resin sheet body 10 shown in FIGS. 1 to 3, in terms of strength, a strip-shaped member separate from the synthetic resin sheet body. Although it is inferior to the case of using a synthetic resin sheet body with slits formed in it, the synthetic resin sheet can be punched into a predetermined shape and at the same time a slit can be formed, so it can be manufactured by a very simple manufacturing process There is an advantage of being.
[0021]
Next, other specific examples of the present invention seedling protective cover shown in FIGS.
The example shown in FIGS. 6 to 7 is basically the same as the example shown in FIG. 5 except that the fastening pieces 32A to 32E are provided with struts erected adjacently to fix the seedling protective cover. A plurality of triangular pieces 33a and notches 33b between the triangular pieces 33a are formed at the position where the annular portion to be inserted is formed and the upper end portion of the seedling protective cover of the synthetic resin sheet body 30 is formed. It is characterized by that.
[0022]
When assembling the synthetic resin sheet body 30, first, as shown in FIG. 7A, the fastening pieces 32A to 32E are respectively provided with the corresponding slits 31A to 31E (however, the slits 31B to 31E are not shown). ) And the two locking pieces provided on the side close to the end of the synthetic resin sheet body 30 of each of the fastening pieces 32A to E are locked to the slits 31A to E, and the synthetic resin sheet body A portion between the tightening pieces in the end portion having the 30 tightening pieces is inserted into the insertion portion 31a. Next, the distal ends of the tightening pieces 32A to E are again inserted into the slits 31A to E, and the locking pieces formed at the distal ends of the tightening pieces 32A to E are the two slits constituting the slits 31A to E. The ring-shaped portion 34 as shown in FIG. 7B is formed by engaging with the slit closer to the end portion of FIG. In addition, when forming a ring-shaped part in this way, you may form one or two or more crease lines in the predetermined position of each fastening piece. The ring-shaped part 34 formed as described above is for inserting the support column 9 erected adjacently to fix the seedling protection cover.
[0023]
When installing the seedling protective cover 1 using the synthetic resin sheet body 10 shown in FIGS. 1 to 3, the seedling protective cover using the synthetic resin sheet body 20 shown in FIG. A protective cover is placed on a seedling planted with its lower end buried in the ground, and then a support made up so as to be adjacent to the seedling protective cover is made of a synthetic resin or metal string ( The seedling protective cover formed with the ring-shaped portion 34 obtained by using the synthetic resin sheet body 30 shown in FIGS. 6 to 7 has such a string shape. There is an advantage that it can be fixed to the column 9 without using a body.
However, even with a seedling protective cover having such a ring-shaped part, it is of course possible to use fixing with a string-like body.
[0024]
On the other hand, the plurality of triangular pieces 33a formed on the upper end portion of the synthetic resin sheet body 30 and the notches 33b between the triangular pieces 33a are, for example, a deer thrusting a face from the upper end of the seedling protective cover to protect the seedlings. When trying to eat shoots of seedlings that grew to the vicinity of the upper end of the cover, the tip of the triangular piece 33a hits and feels pain. The sapling in the cover is prevented from being eaten, and for example, the sapling that has grown higher than the top end of the sapling protective cover touches the top end of the sapling protective cover by shaking due to the action of wind, etc. Even in this case, the seedling protective cover is appropriately bent due to the presence of the notch 33b at the upper end thereof, so that the seedling is damaged by the upper end of the seedling protective cover. It can be suppressed as. For the same reason, even if the deer pierces the face from the upper end of the seedling protective cover as described above and tries to eat the seedling buds and the like grown to the vicinity of the upper end of the seedling protective cover, the triangular piece 33a It is unlikely that deer will be hurt at the tip of the.
[0025]
In addition, the synthetic resin sheet body used in the seedling protective cover of the present invention is usually one having both sides smooth, or one having one surface or both surfaces formed with fine irregularities such as satin or silk. A concave groove as shown in FIG. 8 may be formed.
In particular, when this concave groove is formed on the surface that becomes the outer surface when used as a sapling protective cover along the length direction when used as a sapling protective cover, the workability when assembling into a cylindrical shape is further improved. improves. That is, it is easier to make the synthetic resin sheet body 40 formed with the concave grooves 49 as shown in FIG. 8 cylindrical than the synthetic resin sheet body that does not form such concave grooves. Therefore, when the synthetic resin sheet body 40 having such a concave groove 49 is used, workability when assembling into a cylindrical shape is improved.
Moreover, even if the surface of the seedling protective cover is damaged by forming such a concave groove, there is an advantage that the damage is not conspicuous.
Furthermore, such a concave groove can also be provided in the tightening piece. In particular, as shown in FIGS. 6 to 7, when the annular portion is formed by the tip portion of the fastening piece, there is an advantage that workability for forming the annular portion is improved.
Such a groove is formed, for example, when sheeting a synthetic resin sheet before punching out the synthetic resin sheet body or by embossing after sheeting.
[0026]
The above groove is sufficient to allow the seedling protection cover surface not to be noticeable, or to leave the seedling protection cover outdoors for several years (usually about five years). In order to maintain high strength, the distance K between the concave grooves, the width W of the concave grooves, the depth D of the concave grooves, and the thickness T of the synthetic resin sheet body in the concave grooves formed on the surface thereof are shown in Formula 2. It is desirable to satisfy the relationships (1) to (3).
[Expression 2]
(1) K ≒ W ≒ 2D
(2) T ≧ 1.3D
(3) 0.1 mm ≦ K ≦ 2.0 mm
[0027]
The seedling protective cover of the present invention has been described above with some specific examples. However, the seedling protective cover of the present invention is not limited to the seedling protective cover as described above. For example, in the above-described examples, in each of the end portions of the synthetic resin sheet body provided with the fastening pieces, an insertion portion for inserting a portion between the fastening pieces is provided. If the interval is narrow, or if there is no particular hindrance even if the part between the fastening pieces is slightly lifted, the end of the synthetic resin sheet body on the side where the fastening pieces are provided However , in the above-described specific example, the slit for inserting and locking the tightening piece is constituted by two slits. The number of slits constituting the slit for inserting and locking the tightening piece is not limited to this. Further, the number and interval of the tightening pieces (slits through which they are inserted), the width (corresponding to w ₁ and w ₂ in FIG. 2) and the length (LA in FIG. 2, L _A , corresponds to L _B), for also like shape tightening piece (including the shape of the locking pieces provided on both ends), corresponding to the intensity of the seedlings protective cover obtained by assembling it (especially the strength of the tightening portion), etc. Is set. Further, the fastening piece may be formed separately and fixed to the synthetic resin sheet.
[0028]
Furthermore, the structure (tightening structure) or the like of the present invention seedling protective cover that is assembled into a cylindrical shape by inserting and locking the fastening pieces into the slits is not only adopted for the cylindrical shape, Needless to say, it can be applied to a cylindrical shape having a polygonal shape.
However, since the cylindrical seedling protective cover having a polygonal cross-sectional shape must be formed with a bent portion, it is necessary to form a crease line, which increases the number of processes, and the bent portion. However, the present invention has a problem that the strength is lower than other parts, a problem that it takes time to bend the crease line formation part when installing such a seedling protection cover, etc. Particularly preferably, the cover has a cylindrical shape.
[0029]
The seedling protective cover of the present invention having the above-described configuration is assembled when transported and installed in the state before being assembled into a cylindrical shape (that is, in the state of a synthetic resin sheet).
Therefore, it is not bulky during transportation.
[0030]
【The invention's effect】
As described in detail above, the seedling protective cover of the present invention can be manufactured by a simpler manufacturing process than a seedling protective cover having a regular even-numbered square shape (regular hexagon etc.). It is possible, is not bulky during transportation, and is excellent in workability when it is installed.
In addition, when the seedling protective cover placed on the seedling is removed after the seedling has sufficiently grown, there is also an advantage that it can be easily removed simply by cutting the fastening piece.
[0031]
In addition, when the tightening piece forms a ring-shaped portion through which a support column erected adjacent to fix the seedling protection cover, a string-like body that had to be used in the past is used. There is an advantage that the seedling protection cover can be fixed to the support column without using it or by using a smaller number of string-like bodies than in the past.
[0032]
Furthermore, as the synthetic resin sheet body, a plurality of concave grooves along the length direction of the seedling protective cover are formed on the surface of the seedling protective cover obtained by assembling the synthetic resin sheet. When the synthetic resin sheet body is used, in particular, when the synthetic resin sheet body in which the concave groove satisfying the condition shown in the above formula 2 is used, the synthetic resin sheet body is cylindrical. There is an advantage that workability when assembling into a shape is improved, and even if the surface of the seedling protective cover is damaged, it is inconspicuous.
[0033]
Furthermore, when the shape of the seedling protective cover of the present invention is cylindrical, not only simplification of the manufacturing process and improvement in workability at the time of installation, but also, for example, a seedling protective cover having a regular hexagonal cross-sectional shape is provided. In this case, deer etc. bite the folded part that was crushed for some reason, and it often happened that the seedling protective cover was removed or the seedling protective cover was torn off from the part. In the seedling protective cover, it is extremely difficult to be crushed, and it is practically impossible for a deer or the like to bite if it is not crushed.
[Brief description of the drawings]
FIG. 1 is a view showing an example of a synthetic resin sheet used in the present invention.
FIG. 2 is a diagram showing a state in which the synthetic resin sheet body shown in FIG. 1 is assembled.
FIG. 3 is a view showing a seedling protective cover obtained by assembling the synthetic resin sheet body shown in FIG. 1;
FIG. 4 is a view showing a modified example of a fastening piece (a modified example of a corner portion between the fastening piece and a synthetic resin sheet body end).
FIG. 5 is a view showing a state in which another example of the synthetic resin sheet body used in the present invention is assembled.
FIG. 6 is a view showing another example of a synthetic resin sheet used in the present invention.
7 is a view showing a state in which the synthetic resin sheet body shown in FIG. 6 is assembled. FIG.
FIG. 8 is a partial enlarged cross-sectional view showing an example of a synthetic resin sheet body in which concave grooves are formed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Sapling protective cover 10, 20, 30 ... Synthetic resin sheet body 11A-E, 21A-B, 31A ... Slit 12A-E, 22A-B, 32A which inserts and latches fastening piece ~ E ・ ・ ・ tightening piece

Claims (5)

It is a cylindrical seedling protective cover with both ends opened, which is formed by assembling a predetermined-shaped synthetic resin sheet body to be used over a seedling,
The synthetic resin sheet body has a plurality of fastening pieces at one end, and a slit for inserting and locking the fastening pieces at a position corresponding to each fastening piece near the other end. ,
Each of the tightening pieces of the synthetic resin sheet body is assembled into a cylindrical shape by inserting and locking into the corresponding slit ,
Between each slit provided in the vicinity of the end portion of the synthetic resin sheet body, an insertion portion for inserting a portion between the tightening pieces at the other end portion having the plurality of tightening pieces is formed. A seedling protective cover. The seedling protective cover according to claim 1, wherein the formation positions of the slit and the insertion portion in the synthetic resin sheet body are formed so as to be staggered so as not to be in a straight line. The seedling protective cover according to claim 1 or 2 , wherein each of the tightening pieces forms a ring-shaped portion through which a support column erected adjacent to the seedling protective cover is fixed. A plurality of concave grooves along the length direction of the sapling protective cover are formed on the surface of the sapling protective cover obtained by assembling the synthetic resin sheet. The seedling protective cover according to any one of claims 1 to 3 , which is a synthetic resin sheet body. The seedling protective cover according to any one of claims 1 to 4 , wherein the seedling protective cover has a cylindrical shape.

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