JPH10248410A - Sheet fixing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve the problem that the removal of a sheet fixing tool used for fixing a sheet to a round pipe which is a bone structure part is extremely difficult even though attachment is easy in the greenhouse growing house of a type for spreading and fixing a plastic sheet. SOLUTION: This sheet fixing tool 1 is in an external shape for which a cylinder is partially notched along the axial direction and a cross section is almost C-shaped and a locking part capable of locking a bar-like body in the axial direction is provided. To put it concretely, the locking part can be a recessed groove 3, a through-hole or a ring-like bent part obtained by bending a metal wire when it is provided with a C-shaped metal wire, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for fixing a plastic sheet to a round pipe as a skeleton in a house for cultivating a house in which a plastic sheet is stretched and fixed (hereinafter referred to as "vinyl house"). It is related to the structure of.

[0002]

2. Description of the Related Art House cultivation has been replaced by glass greenhouses which have been the mainstream in the past, and vinyl houses are now exclusively used. Vinyl houses have the advantage of low construction costs, but their durability is significantly inferior to those made of glass, so if they do not require coating,
Often, the sheet is removed and stored until the next covering time. However, even if it is stored with careful attention,
It is necessary to renew the seat about once every two years. The skeleton, which is another element that constitutes the vinyl house, is mainly composed of a steel pipe that is a round pipe, and there are various types of main frames, but none of them is basically removed depending on time.

[0003] Therefore, since the plastic sheet is repeatedly fixed and removed from the round pipe, the plastic sheet is not fixed by bonding or other means which cannot withstand repetition, and is easily fixed. It is often fixed by a tool.

As shown in FIG. 5, a typical fixture has a general shape in which a cylinder is partially cut out along the longitudinal direction. The notch portion of the fixture A is pressed against a round pipe P constituting a vinyl house, and the plastic sheet S is put on the round pipe P to fix the sheet S. The width of the cutout portion is set smaller than the outer diameter of the round pipe P, so that when the fixing tool is fitted into the round pipe P, the fixing tool A is deformed. This deformation needs to be restored to a level sufficient to hold and fix the sheet S.

[0005]

Since the fixture having such a shape and structure is used, the installation can be performed relatively simply by merely applying a pressing force. However,
When removing, there are few clues that cannot be removed easily. In particular, it was a difficult task for the elderly and women and women.

[0006] Further, if the holding force of the fixing device is reduced with the emphasis placed on easy detachability, the fixing force of the sheet tends to be reduced accordingly, which is rather a problem.

[0007]

In view of the above points, the present inventor has finally made the present invention as a result of earnest research, and the feature of the present invention is that a skeleton comprising a series of round pipes is provided. A member for fixing the plastic sheet of the house cultivation house of a type in which a roof surface or a wall surface is formed by stretching and fixing a plastic sheet to the round pipe, and the general shape is a cylinder having a shaft. The cross section, which is partially cut away along the direction, is generally C-shaped, and has elasticity that can pinch the cut beyond the diameter of the round pipe if the cut is pressed against the round pipe. And a locking portion capable of locking the rod in the axial direction.

That is, according to the present invention, when inserting a rod-shaped portion (a shaft portion in the case of a driver) of a tool having a rod-shaped portion such as a driver (screwdriver), the tool is turned around the tip thereof as a fulcrum. It can be said that this is a sheet fixing device that can be easily removed from the round pipe by being made to have such an inserted (or fitted) portion.

The term "vinyl house" is used in the early stage of so-called house cultivation agriculture using soft plastic sheets (and films). It is a phrase that originated from what was called "vinyl (or vinyl)", including plastic. In this specification, even in the specification, a material using polyethylene or other plastics is referred to as a “vinyl house”.

[0010] The vinyl house is roughly formed of a sheet member and a skeleton supporting the sheet member. The skeleton is generally formed by combining steel pipes, and a round pipe is adopted at least at a place where the plastic sheet is fixed by the fixture of the present invention.

The "plastic sheet" is fixed to a round pipe and stretched to cover the vicinity of the crop. Usually, a transparent and flexible sheet is used. Also, regarding the word "sheet", depending on the thickness, "film" and "sheet"
However, in the present invention, there is no limitation on the thickness, and therefore, the term “film” is used synonymously.

The term "locking portion" is a phrase indicating a portion of the main body mounted on a round pipe for locking the bar along the axial direction as a removing member when removing the main body. is there. For example, after inserting a rod-like body having a high rigidity and a certain length, such as the axis of a screwdriver (screw driver), in the axial direction of the fixed part, and rotating about the tip of the rod-like body as a fulcrum, The rod-like body itself becomes a gripping part and is easy to hold, so that it is easy to remove. Alternatively, in the case of a bar-shaped body such as a crowbar, it can be easily removed by fitting the hooked portion into the locking portion and rotating it. Furthermore, if a long rod is used and the distance from the fulcrum of the rod to the fixture is small and the distance between the gripping portion of the rod and the fixture or the fulcrum is large, the rod can be removed by the principle of leverage. The force required is small. Further, it is preferable that the position of the locking portion is opposite to the cutout opening of the main body which is C-shaped when there is only one locking portion.

The locking portion may have basically any structure and shape as long as the above purpose is achieved. For example, if a groove is provided in the inner surface of the fixture in the axial direction, when it is installed on a round pipe, between the groove and the surface of the round pipe (actually, a plastic sheet is placed between the round pipe and the fixture). Is present), so that the rod can be inserted here and the fixture can be removed. In this case, the concave groove corresponds to the “locking portion” referred to here. Alternatively, the locking portion in the form of a concave groove may damage the plastic sheet when inserting the rod-shaped body. To avoid this, a through-hole is provided in the axial direction, and the rod-shaped body is inserted through this through-hole. May be. In the case where the fixing portion main body is made of plastic and reinforced with a C-shaped metal wire, it is also possible to provide a locking portion on the C-shaped metal wire. That is, the metal wire may be provided with a ring-shaped bent portion, and the rod-shaped body may be inserted therethrough. Alternatively, in the case of using a rod-like body having a structure such as a crowbar, the tip of the crowbar may be hooked on this annular bent portion. In such a case, the annular bent portion corresponds to the “locking portion” referred to here. In many cases, a plurality of C-shaped metal wires are provided on one fixture, but it is irrelevant whether all of them have the annular bent portion.

By the way, when removing the sheet fixing device according to the present invention, the rod-like body is necessary as described above, but the shape and structure of this rod-like body are not limited at all. If the structure of the locking portion requires that the rod be inserted, the rod must have a length sufficient to insert the locking portion, and the rod is locked by hooking or fitting. The rod-shaped portion may be short as long as it is a type that does not cause a problem in the locking ability by applying a force in the removing direction.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 1 shows an example of a seat fixture 1 according to the present invention (hereinafter, referred to as "the present invention fixture 1"). Part shaped like a notch along its length,
It is a plastic integral molded product. If the notch 2 is pressed against the round pipe P and pressed in the pressed direction, the notch 2 is deformed to exceed the diameter of the round pipe P, and is fixed to the round pipe P in such a manner as to pinch the round pipe P. Become. Since the plastic sheet S is attached to the round pipe P in advance, the sheet S is eventually fixed to the round pipe P.

On the inner surface side of the fixture 1 of the present invention, a concave groove 3 is provided along the axial direction. This groove 3
The notch 2 is located just opposite the center axis.

FIGS. 2A and 2B are schematic cross-sectional views showing a state in which the fixture 1 of the present invention installed on the round pipe P is removed using a screwdriver 4. FIG. First, the shaft of the screwdriver 4 is inserted from the concave groove 3 of the fixture 1 of the present invention [FIG. Since the space formed by the outer surface of the round pipe P and the concave groove 3 is large enough to allow the shaft of the driver 4 to enter and exit with a margin, it can be easily inserted into the state shown in FIG.

Next, the handle 42 is rotated about the tip 41 of the shaft of the driver 4 as a fulcrum [FIG. The length of the shaft of the screwdriver 4 is sufficiently longer than the length of the fixture 1 of the present invention, and the fixture 1 of the present invention can be removed with a very small force. Note that a thick, flexible plastic pipe 43 is fitted so as to cover the portion from just before the tip 41 of the driver 4 to a position beyond the tip 41, so that the sheet S is not damaged when being removed. In this example, the fixture 1 of the present invention was removed using a screwdriver. However, since a mechanism for attaching and removing a screw is not utilized, other tools can be used. .

FIG. 3 shows another example of the present invention, in which the portion into which the shaft of the driver is inserted is not a concave groove but a through hole 5. The method of removing the fixture 1 of the present invention in this example is basically the same as that of the previous example. In the case of the through hole 5, the sheet S is not damaged when a driver's shaft or the like is inserted.
There is an effect that the removed fixture 1 of the present invention does not have to be picked up because it is difficult to drop.

The fixture 1 of the present invention shown in FIGS.
Is an example in which the curved metal wire 6 that holds a plastic body in the circumferential direction is devised so that it can be easily removed. That is, a ring-shaped bent portion 7 is formed near the center of the curved metal wire 6, and this is to be used. In the present embodiment, a portion other than the curved metal wire 6 (that is, a plastic integrated molded product portion) partially forms the padding portion 8 for forming the locking groove of the curved metal wire 6 (the position of the annular bent portion 7). Although it has a shape like a stripped, it is possible to use the conventional product as it is, so when manufacturing,
No or little change in production mold will be required. In the case of the present example, in addition to the method of inserting the shaft of the driver described above, as shown in FIG. It is also possible.

[0022]

As described in detail above, the seat fixing device according to the present invention is a house of the type in which a roof surface or a wall surface is formed by stretching and fixing a plastic sheet to a skeleton formed by connecting round pipes. A member for fixing the plastic sheet of the cultivation house to the round pipe, which has a generally C-shaped cross section as a part of a cylinder is cut away along an axial direction thereof; If the portion is pressed against the round pipe and pressed, it has an elasticity capable of pinching it beyond the diameter of the round pipe and has a locking portion capable of locking the rod in the axial direction. This is a very advanced invention that can be easily removed using tools such as a screwdriver and a crowbar.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a plastic sheet is fixed to a round pipe by an example of a sheet fixing device according to the present invention.

FIGS. 2 (a) and 2 (b) are both schematic cross-sectional views showing a state in which a seat fixture according to the present invention installed on a round pipe is removed.

FIG. 3 is a perspective view showing another example of the seat fixture according to the present invention.

FIGS. 4A and 4B show still another example of the seat fixing device according to the present invention, wherein FIG. 4A is a perspective view and FIG.
Is a side view.

FIG. 5 is a perspective view showing one usage example of an example of a conventional seat fixing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet fixing tool according to the present invention 2 Notch 3 Depressed groove 4 Driver 41 Tip 42 Handle 43 Plastic pipe 5 Through hole 6 Curved metal wire 7 Ring-shaped bent portion 8 Filling portion 9 Bar-shaped release tool P Round pipe S Plastic sheet A Conventional seat fixture

Claims (4)

[Claims] 1. A method for fixing a plastic sheet of a house cultivation house of a type in which a roof surface or a wall surface is formed by stretching and fixing a plastic sheet to a frame portion formed by connecting round pipes to the round pipe. The member has a general shape in which a cross section is substantially C-shaped such that a cylinder is partially cut out along the axial direction thereof. If the cut portion is pressed against the round pipe, the round pipe is formed. A seat fixing device having elasticity capable of sandwiching the bar beyond a diameter portion and having a locking portion capable of locking a rod-shaped body in an axial direction. 2. The locking portion is a groove formed in the inner surface along the axial direction, and the position of the groove is opposite to the notch opening of the C-shaped main body. The seat fixture according to the above. 3. The locking portion is a through-hole formed in the main body along the axial direction, and the position of the through-hole is on the side opposite to the C-shaped cutout opening of the main body. The seat fixture according to the above. 4. The main body is made of plastic, and
A metal wire reinforced by a C-shaped metal wire.
2. The seat fixing device according to claim 1, further comprising a ring-shaped bent portion obtained by bending the metal wire, the position of the ring-shaped bent portion being opposite to the notch opening of the C-shaped main body.