JP3041825U - Agricultural sheet fasteners - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a fastener that can securely fix an agricultural sheet without increasing the clamping force. [Structure] A convex part on the part of the fastener that presses the sheet, and
By providing the recess, the sheet is prevented from being displaced or disengaged without changing the closing force of the fastener, and the sheet is fixed more accurately.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a fastener for sandwiching and fixing an agricultural sheet.

[0002]

[Prior art]

 In recent years, cultivation of crops using agricultural sheets such as plastic sheets and non-woven fabrics has been popular, but fasteners are often used to fix these crops so that they will not be blown after spreading. For example, in the so-called “solid” method of spreading an agricultural sheet directly on a crop, a fastener tied near the root of the crop is used to secure the sheet. By sandwiching the end of the sheet with the fastener, the end of the agricultural sheet is fixed to the root of the crop so that the sheet is not blown off by wind or the like. Also, fasteners are often used in mulch cultivation. For example, as shown in FIG. 7, the ridge is covered with two multi-sheets 8 ′ from the left and right, the two sheets are overlapped at the central portion, and clamped by the fastener 1 to fix them.

At present, household clothespins are mainly used as such fasteners, but the rinsing sandwiches were developed only for sandwiching clothes, and are thin and slippery like a sheet. It was difficult to grasp the object easily when sandwiched, and the seat could come off from the fastener even in weak wind. Therefore, in order to increase the gripping force of the clothespin, a method of increasing the thickness of the wire, which is a pressurizing material, was also studied, but if the gripping force is increased, a large force is required to open the clothespin. Workability was reduced.

[0004]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to provide a fastener that can securely fix an agricultural sheet without increasing the clamping force.

[0005]

According to the present invention, there is provided a fastener that opens and closes a grip portion when the grip portion is opened and closed, and the fastener portion opens and closes with the support portion as a fulcrum. Provided is a fastener for an agricultural sheet, which is characterized in that a recess is formed, and further, only one convex portion is provided on one fastening portion and only one concave portion is provided on the other fastening portion. And a fastener for the agricultural sheet, wherein the height of the protruding portion of the convex portion is 2 to 10 mm. A tool is provided, and further, the depth of the concave portion is 0.5 mm or more deeper than the height of the protruding portion of the convex portion, and the fastener for the agricultural sheet is provided. Is at least 5 mm in diameter Fasteners of the agricultural sheeting is provided which is characterized in that it is hollowed out to a size that can be inserted type.

That is, by providing a convex portion and a concave portion in the portion of the fastener where the sheet is fastened, the sheet is prevented from slipping or coming off without changing the clamping force of the fastener, and the sheet is fixed. Make it more accurate.

[0007]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a front view (A), a right side view (B), and a sectional view (a-a ') in the right side view showing an embodiment of a fastener 1 according to the present invention. The fastener 1 according to the present invention comprises a member having a convex portion 6a (hereinafter referred to as a convex-side clamping member 2a) and a member having a concave portion 6b (hereinafter referred to as a concave-side clamping member 2b). ), And the pressing member 3 that presses the convex-side holding member 2 a and the concave-side holding member 2 b in the direction in which the convex portions 6 a and the concave portions 6 b are engaged with each other. The convex-side holding member 2a and the concave-side holding member 2b have grip portions 4a and 4b, supporting portions 5a and 5b, and fastening portions 7a and 7b, respectively, and the supporting portions 5a and 5b are engaged with each other and the supporting portion 5a The grip portions 4a, 4b and the fastening portions 7a, 7b can be moved in the opening / closing direction with the fulcrum 5b as a fulcrum, and the fastening portions 7a, 7b are normally closed by the pressure member 3. When sandwiching the agricultural sheet 8, the grips 4a, 4b are grasped to open the fastening parts 7a, 7b, and after the sheet 8 is put therein, the force applied to the grips 4a, 4b is loosened to fix the fastening parts 7a, 7b. It is good to close 7b.

FIG. 2 is a perspective view (A) of the convex-side clamping member 2 a, a perspective view of the concave-side clamping member 2 b, and a perspective view (C) of the pressing member 3 that constitute the fastener 1 shown in FIG. 1. ). The convex-side clamping member 2a has a grip portion 4a that can be easily gripped by a hand, a support portion 5a that can be engaged with a support portion 5b of the concave-side clamping member 2b, and a retaining portion 7a having a convex portion 6a. doing . The supporting portion 5a must not interfere with the movement of the grip portions 4a, 4b and the holding portions 7a, 7b in the opening / closing direction when the supporting portion 5a is engaged with the supporting portion 5b. In this specification, as such an occlusal method, a method of occluding the hemispherical convex portion 5a1 and the hemispherical concave portion 5a2 that occludes the convex portion 5a1 is exemplified, but the invention is not limited thereto. Further, the fastening portion 7a has a convex portion 6a, but if the height of the convex portion of the convex portion 6a is too long, the sheet will be torn or wrinkled when the agricultural sheet is sandwiched by the fastener 1. However, the fastening parts 7a and 7b may float, and if the length is too short, the effect will not be sufficiently exerted. From the above, the height of the protruding portion of the convex portion 6a is preferably about 2 to 10 mm 2. Further, it is preferable that the fastening portion 7a is not a flat shape and is finely cut so that the sheet is less likely to be displaced.

The holding member 2b on the concave portion side, like the holding member 2a on the convex portion side, includes a grip portion 4b, a supporting portion 5b, and a holding portion 7b, and the holding portion 7b is provided with a concave portion 6b. The shape of the concave portion 6b is not particularly limited as long as it can sufficiently accommodate the convex portion 6a covered with the agricultural sheet, but when the convex portion 6a is engaged, the convex portion 6a and the concave portion 6b are formed. It is preferable that a gap of 0.5 mm or more is formed at the boundary. This is because if the gap is narrower than 0.5 mm, the convex portion 6a may not be sufficiently set inside the concave portion 6b when sandwiching the sheet. If the depth of the concave portion is 0.5 mm or more deeper than the height of the protruding portion of the convex portion 6a, it may be a through hole reaching the back surface of the concave-side holding member 2b, and is a recess that does not reach the back surface. May be. Furthermore, the pressure member 3 can be used without particular limitation as long as it has elasticity, and for example, it may be an arc-shaped metal as shown in FIG. 2 (C). The wire may be wound into a coil as shown in FIG.

FIG. 3 is a right side view (A) showing another embodiment of the fastener 1 of the present invention, a cross-sectional view taken along the line aa ′ in the right side view (B), and yet another embodiment. It is sectional drawing (C) showing. 3 (A) and 3 (B), the fastening portions 7a and 7b are enlarged to widen the contact surface with the sheet, and in FIG. 3 (C), the fastening portion 7a is raised and the fastening portion 7b is provided. The contact surface with the sheet is widened by forming a recess having a shape opposite to the bulge of the fastening portion 7a. Since these fasteners 1 are in wide contact with the seat, the sheets are more unlikely to shift.

FIG. 4 is a plan view (A), a front view (B) and a right side view (C) showing another embodiment of the fastener 1 of the present invention. The fastener 1 has fulcrums 5a and 5b integrated by a mandrel 9, and further, a pressurizing material 3 is wound around the mandrel 9 in a coil shape, and an end portion of the pressurizing material 3 has grips 4a and 4b inside. By pressing and opening from, the fastening portions 7a and 7b are closed. The fastener 1 has a larger force of the pressurizing material 3 than the fastener 1 shown in FIGS. 1 to 3 and a larger closing force of the fastening portions 7a and 7b, but the force required to open the fastening portions 7a and 7b is also increased. It is large and the workability is reduced. Further, the fastening portions 7a and 7b have a horizontally long rectangular shape, and have a large contact surface with the seat. It is to be noted that the retaining portions 7a and 7b have the convex portions 6a and the concave portions 6b as in FIGS.

FIG. 5 shows an embodiment in which a space between the supporting portions 5a and 5b and the fastening portions 7a and 7b is hollowed out. Since the fastener 1 has a wide hollow between the supporting portions 5a, 5b and the fastening portions 7a, 7b, it is possible to sandwich a house pillar or a tunnel pillar in the hollowed portion, for example, as shown in FIG. As shown, the agricultural sheet 8 used for tunnel cultivation can be fastened from above the support column 10. Since the pillars used for greenhouse cultivation and tunnel cultivation usually have a diameter of 5 mm or more, a pipe with a diameter of at least 5 mm cannot be inserted between the supporting portions 5a and 5b and the fastening portions 7a and 7b. must not.

Next, the force for fixing the film was measured using a commercially available clothespin and the fastener 1 described in FIG. The measurement was performed as follows. First, prepare a low-density polyethylene bag (thickness: 25 μm), put a string on one end of a commercially available clothespin, sandwich the opening of the bag, and lift the bag with the string. Next, 15 g weights were put in the bags one by one, and it was measured how many grams of load was applied to the bag and whether the clothespin dropped the bag. Further, the same measurement is performed using the fastener 1 in which the pressurizing material 3 is attached to the string instead of the commercially available clothespin, and it is determined how many grams of load is applied to the bag before the fastener drops the bag. did. As a result of the measurement, the clothespin dropped the bag when the weight reached 75 g, whereas the fastener shown in FIG. 1 dropped the bag when the weight reached 522 g. The fastener according to the present invention could withstand a load of about 7 times.

[0014]

【effect】

 INDUSTRIAL APPLICABILITY The fastener according to the present invention requires a small amount of force to open the fastening portion, and can reliably grip even a thin and slippery agricultural sheet. In addition, by hollowing out a wide space between the retaining part and the branch part, it is possible to sandwich the agricultural sheet used for tunnel cultivation and greenhouse cultivation together with the support columns, for example, when ventilating inside the tunnel or house. It can also be used when lifting the hem of a sheet covering a house or tunnel and temporarily fixing it to a column.

[Brief description of the drawings]

FIG. 1 is a front view (A), a right side view (B), and a sectional view taken along the line aa ′ (C) showing an embodiment of a fastener 1 according to the present invention.
It is.

FIG. 2 is a convex-side clamping member 2 that constitutes the fastener 1 shown in FIG.
FIG. 3A is a perspective view showing a, FIG. 3B is a perspective view showing a recess side holding member 2b, and FIG.

3A is a right side view showing an embodiment of the fastener 1 according to the present invention, FIG. 3B is a sectional view taken along line aa ′, and FIG. 3C is a sectional view showing yet another embodiment.

FIG. 4 is a plan view (A), a front view (B) and a right side view (C) showing an embodiment of a fastener 1 according to the present invention.

FIG. 5 is a front view (A), a right side view (B), and a sectional view taken along the line aa ′ (C) showing an embodiment of the fastener 1 according to the present invention.
It is.

FIG. 6 is an explanatory diagram showing a usage example of the fastener 1.

FIG. 7 is an explanatory diagram showing a usage example of the fastener 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fastener 2a Convex part side clamping material 2b Recess side clamping material 3 Pressurizing material 4a, 4b Grip part 5a, 5b Support part 5a1, 5b1 Hemispherical convex part 5a2, 5b2 Hemispherical concave part 6a Convex part 6b Recessed part 7a, 7b Clasp part 8 Agricultural film 8'Multi sheet 9 Mandrel 10 Strut

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[Procedure amendment]

[Submission date] May 22, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 4

[Correction method] Change

[Correction contents]

Claims (5)

[Utility model registration claims] 1. A support portion 5 when the grip portions 4a, 4b are opened and closed.
A fastener having a structure in which the fasteners 7a and 7b are opened and closed with a and 5b as fulcrums, and the fasteners 7a and 7b of the fastener are provided with a convex portion 6a and a concave portion 6b which can be engaged with each other. 1. Agricultural sheet fastener 1. 2. The agriculture according to claim 1, wherein one retaining portion 7a is provided with only one convex portion 6a, and the other retaining portion 7b is provided with only one concave portion 6b. Sheet fastening 1. 3. The height of the protruding portion of the convex portion 6a is 2 to 1
It is 0 mm, The fastener 1 of the agricultural sheet in any one of Claim 1 thru | or 2 characterized by the above-mentioned. 4. The fastener for an agricultural sheet according to claim 1, wherein the depth of the concave portion 6b is 0.5 mm or more deeper than the height of the protruding portion of the convex portion 6a. 1. 5. The method according to claim 1, wherein a space between the supporting portions 5a and 5b and the fastening portions 7a and 7b is hollowed out so that a pipe having a diameter of 5 mm or more can be inserted. Agricultural sheet fastener 1 described.