JPH02211812A - Film-fixing tool - Google Patents

Abstract

PURPOSE:To fix even a hard film without producing creases by nipping the film between both the side upper ends of a support member and both the grooves of a fixing member and subsequently inserting a screw from the side of the fixing member until the screw penetrates the support member. CONSTITUTION:A film 3 is nipped between a support member 2 having two side curved upper ends 21 and 22 and a fixing member 4 having two grooving portions 41 and 42 corresponding to the curved portions 21 and 22, and a screw 5 is penetrated into the members 2 and 4 and the film 3 to strongly press the fixing member to the support member. The film is nipped with two the curved portions and two the grooved portions and even a hard film such as a fluorinated resin film does not produce any damage such as breakage and any crease.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applicable to a film fixing jig used for spreading films for agricultural greenhouses, etc., and is particularly applicable to spreading hard films such as agricultural fluororesin films. The present invention relates to a suitable film fixing jig.

[Prior Art] As agricultural films that are stretched to form agricultural greenhouses, flexible films made of polyvinyl chloride resin, polyethylene resin, ethylene-vinyl acetate copolymer resin, etc. are widely used.

When forming agricultural greenhouses, wrinkles in the stretched film not only impair the appearance, but also impede the growth of crops due to uneven light transmission, and cause condensation water to form on the inside of the film. Not only does this cause problems such as water droplets accumulating and falling onto the crops, causing damage to the crops, but also may cause damage such as tears due to external factors such as wind and snow accumulation.

Therefore, when forming an agricultural greenhouse, it is extremely important to stretch the agricultural film so that wrinkles do not occur.

Therefore, conventionally, a spring made of a bending member having concave portions and convex portions connected alternately is attached to a groove frame having a concave cross section with an enlarged bottom, which is attached to the house frame. An agricultural film stretching method has been adopted in which the above-mentioned agricultural film is fixed by locking with the agricultural film interposed therebetween.

According to this method, as disclosed in Publication of Utility Model Publication No. 57-44093, etc., for example, a groove frame called Binivet (product name manufactured by Nitobu Kogyo Co., Ltd.) and a groove frame that can be latched to the groove frame are used. By locking as described above using the spring, agricultural films such as soft polyvinyl chloride resin films can be easily fixed and stretched in a uniformly stretched state without wrinkles.

[Problem to be solved by the invention]

However, when fixing a film using a groove frame and a spring as described above, it is generally effective for soft films with low weather resistance. For hard films such as agricultural fluororesin film (hereinafter referred to as agricultural fluororesin film), it is difficult to accurately fix the film in a fixed position, and at the same time, the restoring elasticity of the spring presses the film at the top of the convex part. There is a problem in that wrinkles inevitably occur in the portions of the film that are not coated.

Accordingly, an object of the present invention is to provide a film fixing jig that can securely fix even hard films such as agricultural fluororesin films without causing wrinkles.

[Means to solve the problem]

The present invention has achieved the above object by providing the following two inventions.

It consists of an elongated support member whose opposing upper end of the side rain is in a convex arc shape, and an elongated fixing member in which a groove with a concave arc shape is formed at a corresponding location on the upper end of the side rain. The film is supported and fixed by sandwiching the film between the upper end of the side rain and the groove and inserting a screw from the outside of the fixing member until it penetrates the support member. film fixing jig (first invention),
And in the first invention, the fixing member has the same structure as the first invention except that the fixing member has a continuous opening narrower than the width of the bottom where the groove is formed. A film fixing jig using (second invention).

[Operation] In both the first and second inventions, the fixing member is strongly pressed against the support member with a screw while the film is sandwiched between the upper end of the side portion of the support member and the groove of the fixing member. Since the film can be attached to the film, it is possible to securely fix even hard films, and since the film is sandwiched between two curved parts with corresponding arc shapes, there is no possibility of tearing caused by applying excessive force to the film. It is also possible to effectively prevent the occurrence of such damage.

〔Example〕

Hereinafter, the present invention will be specifically explained based on Examples.

FIG. 1(a) is a sectional view showing a film fixing jig which is an embodiment of the first invention according to the present invention, together with its usage mode, and FIG. 1(I) is a perspective view of the corresponding part thereof. be.

In the figure, reference numeral 1 indicates a part of the moya that is attached to a frame that constitutes the frame of an agricultural house, etc., and the film fixing jig of this embodiment is a support member 2 that is attached to the moya 1.
Then, while stacking the film 3 on the support member 2, as shown in FIG. The film 3 is fixed by inserting the film 3 through the hole.

The supporting member 2 has an enlarged bottom portion in the form of an elongated frame, and both upper ends of opposing side portions 21 and 22 are each formed with a curved surface having a convex arc shape. This is an elongated member in which grooves 41 and 42 having arcuate concave curved surfaces are formed at corresponding locations on the upper end of the side portion when stacked on the support member. Therefore, the film fixing jig can reliably press the film over its entire length, and therefore can reliably fix even hard films.

Further, in the above film fixing jig, the film 3 is held and fixed between the convex curved surfaces at both upper ends of the side portions 21 and 22 and the concave curved surfaces of the groove portions 41 and 42, as described above. Because of this, it is possible to prevent excessive force from being applied locally to the film 3 in the fixed state, and therefore the film 3 can be securely fixed without being damaged.

In addition, in the above-mentioned film fixing jig, since the fixing member 4 also functions as a lid for the supporting member 2, it is possible to prevent rainwater etc. from entering the inside of the supporting member 2. Therefore, the rainwater etc. can prevent the member 2, etc. It can also effectively prevent mackerel from sipping.

FIG. 2(a) is a sectional view showing a film fixing jig which is an embodiment of the second invention according to the present invention, together with its usage mode, and FIG. 2(b) is a perspective view of a corresponding part thereof. .

The basic structure of the film fixing jig of this embodiment is the same as that of the embodiment of the first invention, but the fixing member 4
However, above it, there is a continuous opening 43 narrower than the width of the bottom where the grooves 41 and 42 are formed.

Therefore, the above film fixing jig has the effect of being able to securely fix the film 3 even when it is hard, as in the case of the first invention, and as shown in FIG.
It is also possible to further fix cheesecloth 6 above the film 3 with a spring 7 in the same manner as in the case of the vinyl pet described above. As a result, in the agricultural house formed using the film fixing jig of this example,
It is also possible to adjust the amount of light irradiated into the house.

In the case of this embodiment, it goes without saying that it is possible to stretch other soft films or other sheet materials instead of the cheesecloth 6. For example, it is possible to stretch the soft film further. When forming an agricultural greenhouse by spreading a double film over the entire greenhouse, it becomes possible to effectively retain heat inside the greenhouse.

Above, in the embodiments shown in FIGS. 1 and 2, the case where the film 3 is fixed at a midway point has been explained. I will explain about it.

FIG. 3 shows a state in which the film 3a extending to the left in the figure and the film 3b extending to the right are connected and securely fixed using the film fixing jig shown in FIG. 1. As shown in Figure 0, which is a cross-sectional view, when using the above-mentioned film fixing jig, the two stacked films 3a and 3b are in close contact with each other around the screw, and a raised part is formed upward. Even if rainwater or the like enters the inside of the support member 2 due to capillary action through the space between the films 3a and 3b, the above-mentioned raised portion will prevent the rainwater from entering directly into the support member 2 itself. can effectively prevent contact with

Further, an effective method of using the film fixing jig of the present invention when applied to house formation will be explained based on FIG. 4.

In FIG. 4(a), reference numeral 8 denotes a skeleton that constitutes the frame of an agricultural greenhouse, and the skeleton 8 is provided with moya llets extending in a direction perpendicular to the plane of the paper at approximately equal intervals (however, in the figure, For convenience, only the top of one side is shown).

The film fixing jig 2.4 of the present invention is disposed on the moya 1 so as to extend diagonally from side to side at predetermined intervals, and is attached with the screws 5, and at the same time fixes the film as described above. It is something to do.

When a film is stretched as described above using the film fixing jig of the present invention to form a house, a screw is screwed into the sheath 1 to fix the film, as shown in an enlarged view in FIG. 4(b). 5, it is important to arrange the haze 1 at appropriate intervals P in order to securely fix the film. Generally, when stretching a film such as soft PVC, the arrangement interval of the moya 1 is about 90 to 1.00 c+a, but in the case of the film fixing jig of the present invention, it may be about 60 to 75 C11. This interval, which is preferable in terms of securing the film reliably and economically, may be any other distance as long as the mounting of the film fixing jig and the fixing of the film are done using screws, etc. that are screwed into the moya. The case of the film fixing jig is also suitable.

Next, to explain the film fixing jig of the present invention in more detail, there is no particular restriction on the material for forming the supporting member and the fixing member as long as the material can securely fix the film, and any material can be used. However, among these, metals such as aluminum and stainless steel are preferred.

Further, the specific shapes of both the supporting member and the fixing member are not limited to those shown in the above embodiments, and as a basic structure, the supporting member has continuous convex curved portions (sides) at opposing positions. (both upper ends).
The fixing member may be any member as long as it has a continuous concave curved surface (groove) at a position corresponding to the convex curved surface of the support member.

In addition, in the case of the second invention, as long as the fixing member has the above-mentioned basic structure and a continuous opening narrower than the width of the bottom part, the specific shape thereof can be changed arbitrarily. be.

The screw for fixing the film is not particularly limited, but it can be made of a hard material that has a cutting blade at the tip and can be used to directly drill and screw into the fixing member and supporting member. A preferred example is one formed of:

Furthermore, there is no particular restriction on the film to which the film fixing jig of the present invention can be applied, and it can be applied to both soft and hard films, as well as the material for which it is formed, but it is especially applicable to hard films that are difficult to fix. It is suitable.

Examples of the above-mentioned hard film include, without limitation, fluororesin films, hard vinyl chloride films, polyester films, etc., but among these, it is suitable for application to the stretching of fluororesin films used in the formation of agricultural greenhouses. This agricultural fluororesin film is not particularly limited, but examples include ethylene-tetrafluoroethylene copolymer, ethylene-chlorotrifluoroethylene copolymer, hexafluoropropylene-tetrafluoroethylene copolymer, perfluoroalkyl vinyl erthyl Preferred examples include films made of a resin selected from the group consisting of -tetrafluoroethylene copolymer, polyvinylidene fluoride, and polyvinyl fluoride, and having a fluorine content of 45% by weight or more.

[Effect of the invention] The film fixing jig of the first invention can securely press and fix the film over a predetermined length, so even hard films can be easily and accurately fixed. .

Moreover, the film fixing jig of the second invention not only has the above-mentioned effects, but also can easily fix other sheet materials such as cheesecloth or film above the fixed film.

[Brief explanation of the drawing]

FIG. 1(a) is a sectional view showing a film fixing jig which is an embodiment of the first invention together with its usage mode;
) is a perspective view of the corresponding part, FIG. Fig. 3 is a sectional view of the film fixing jig showing the manner of connecting and fixing the film, Fig. 4(a) is an explanatory diagram showing the outline of the house structure, and Fig. 4(b) is the fin lem fixing jig. 2... Supporting member 21. 22... Side part 3... Film 4... Fixing member 41. 42... Groove 5... Screw Figure 4

Claims (2)

[Claims] (1) An elongated support member whose opposite upper ends of both sides have a circular convex shape, and an elongated fixing member which has arcuate concave grooves formed at corresponding locations on both upper ends of the side parts. The film is supported and fixed by sandwiching the film between both upper ends of the side portions and the groove, and inserting a screw from the outside of the fixing member until it penetrates the support member. A film fixing jig featuring: (2) An elongated support member whose upper ends of opposing sides are circularly convex, and grooves having circular concave shapes are formed at corresponding locations on both upper ends of the sides, and the width of the bottom where the grooves are formed. and a long fixing member having a narrower continuous opening upwardly, sandwiching the film between both upper ends of the side portions and the groove, and penetrating the support member from the outside of the fixing member. A film fixing jig characterized in that the film is supported and fixed by inserting a screw therethrough.