WO1999053744A1

WO1999053744A1 - Fixing member of greenhouse plastic film and method of spreading the film

Info

Publication number: WO1999053744A1
Application number: PCT/JP1998/004364
Authority: WO
Inventors: Jin Arai; Atsuhi Oikawa
Original assignee: Kabushiki Kaisha Seiwa
Priority date: 1998-04-16
Filing date: 1998-09-29
Publication date: 1999-10-28
Also published as: AU9187098A

Abstract

A fixing member (1) for spreading a plastic film as a covering material of a greenhouse and reducing local breakage of the film, comprising a base member (2) having two side plate portions (22, 23) each erected from each side edge of a bottom plate portion (21) so that an inner angle made with respect to the bottom plate portion (21) is an acute angle and a predetermined gap is secured between the upper edges (22a, 23a), and a press member (3) including an insertion portion (31) inserted between the side plate portions (22, 23) and first and second engagement portions (31a, 31b) so as to clamp the plastic films (A, B) between it and the base member (2), wherein the first engagement portion (31a) is disposed on one of the side portions of the insertion portion (31) in such a manner as to engage with the inner surface of one of the side plate portions (22) of the base member (2) even when it is inclined in one direction and is pulled up, and the second engagement portion (31b) is disposed on the other side portion of the insertion portion in such a manner as not to engage with the inner surface of the other side plate portion (23) of the base member (2) when it is inclined and pulled up in the other direction.

Description

Description Stopper for plastic film for greenhouse and method of stretching

"Technical field"

The present invention relates to a stopper for stretching a plastic film, which is a covering material for a greenhouse, and a method for stretching a plastic film using the stopper.

"Background technology"

Conventionally, when a plastic film, which is a covering material for a greenhouse, is stretched, a stopper 100 as shown in FIG. 11 is used. That is, it has a predetermined length, and has a relationship such that the angle formed by the bottom plate 111 and the bottom plate 111 from both side edges of the bottom plate 111 and the bottom plate 111 is an acute angle, and the upper edge 111 is formed. A base member (base bracket) 110 having two side plate portions 112, 113 raised so as to have an interval between 2a and 113a, and the base bracket 110 And a film holding spring member 120 loaded therein.

The base fitting 110 is disposed, for example, along the width direction on the ceiling surface of the greenhouse with the opening side between the upper end edges 112a and 113a facing outward. The plastic films A and B, which are the covering materials, are first fixed near one edge of one plastic film A to the boundary between the ceiling surface and the wife surface, and near the other edge on the opening of the base bracket 110. Position. Next, the vicinity of one end of the other plastic film B is overlapped with the vicinity of the other end of the upper plastic film A on the base fitting 110. In this state, the mountain-shaped spring member 120 is inserted from the opening of the base fitting 110 so as to press the overlapping portion of the two plastic films A and B. As a result, the top of each peak of the spring member 120 is connected to the side plate 1 of the base fitting 110. 1 2 and 1 1 3 The two plastic films A and B are fixed near the edges to press the inner surface.

However, the above-mentioned stopper 100 has the following problems. First, since the spring member 120 is in contact with the plastic films A and B only at the top of each mountain, there is a problem that the film surface is worn by rubbing and easily broken. In particular, in recent years, polyolefin-based plastic films have been widely used instead of vinyl films because they have excellent weather resistance, generate no harmful gas even when burned, and are easy to dispose of. However, there is a problem that it is particularly vulnerable to abrasion as compared with vinyl finolem.

For this reason, when using a polyolefin-based plastic film, instead of fixing the vicinity of each edge of the plastic films A and B to one base fitting 110 as described above, Two base brackets are attached to the right and left, and one near the other edge of the plastic film A on the right and one near the one edge of the other plastic film B on the left. Fixing has been carried out. According to this method, compared to a case where two plastic films A and B are overlapped and fixed to the base bracket 110, the elastic member can be used. can do. However, in this case, it is necessary to use two base fittings to fix one of the edges of the two plastic films A and B, and many shadows are generated in the greenhouse by the width. There is a problem.

The present invention has been made in view of the above circumstances, and it is possible to fix the vicinity of the edge of adjacent plastic films to one base member at a time, and to prevent tearing due to local wear of the film surface due to rubbing. It is an object of the present invention to provide a stopper for a plastic film for a greenhouse, which can reduce the occurrence thereof, and a method for stretching a plastic film using the stopper. "Disclosure of the invention"

In order to achieve the above object, according to claim 1, a stopper for fixing a plastic film that is a covering material of a greenhouse,

A base having two side plates formed opposite to each other so as to have a predetermined interval between the upper edges and to have a tapered portion below the upper edges so that the interval between the upper edges is wider than the interval between the upper edges. Components,

It has an insertion portion inserted between the side plate portions, and has one side portion of the insertion portion which is engaged with the inner surface of one side plate portion when pulled up in a direction orthogonal to the bottom plate portion of the base member. And a first engaging portion that engages with the inner surface of the one side plate portion to regulate the inclination even when trying to pull up while tilting in one direction, and a base on the other side portion of the insertion portion. When it is lifted in the direction perpendicular to the bottom plate of the sliding member, it engages with the inner surface of the other side plate, but does not engage with the inner surface of the other side plate when it is tilted up in the other direction. A holding member having a second engagement portion, and

There is provided a stopper for a greenhouse plastic film, wherein the plastic film is sandwiched and fixed between a base member and a holding member.

Claim 2 provides the stopper for a greenhouse plastic film according to claim 1, wherein the base member and the pressing member are made of a metal material.

According to claim 3, a projection is formed on the upper surface of the bottom plate of the base member, and when the holding member is to be inclined in the other direction and pulled up, the projection is drawn to the projection. 3. The stopper for a greenhouse plastic film according to claim 1, wherein the protrusion is provided on an outer surface of an insertion portion of the holding member.

According to claim 4, when the insertion portion is inserted into one of the engagement portions of the insertion portion of the holding member between the side plate portions of the base member, the insertion portion protrudes outward from between the side plate portions, and The stopper for a plastic film for a greenhouse according to any one of claims 1 to 3, further comprising a projecting piece having a bent portion. Claim 5 is a method for stretching a plastic film using a stopper for a greenhouse plastic film according to any one of claims 1 to 4,

Another plastic film that is placed adjacent to the plastic film whose one edge is fixed in place is superimposed, and the vicinity of each superimposed other edge is positioned on the base member, and then the insertion portion of the holding member is inserted. The plastic film is inserted between the side plates of the base member such that the second engaging portion is located at the other end of the plastic film, and the two plastic films are fixed together near the other end. A step of folding another plastic film pulled out from between the first engagement portion of the insertion portion and the base member so as to straddle the space between the upper edges of the side plate portions of the base member, and to position the vicinity of one end edge in place A method for stretching a plastic film for a greenhouse, comprising the steps of:

Claim 6 is a stopper for fixing a plastic film which is a covering material of a greenhouse,

It has an insertion portion inserted between the side plate portions, and has one side portion of the insertion portion which is engaged with the inner surface of one side plate portion when pulled up in a direction orthogonal to the bottom plate portion of the base member. And a first engaging portion that engages with the inner surface of the one side plate portion to regulate the inclination even when trying to pull it up in one direction, and a base is provided on the other side portion of the insertion portion. When it is lifted in the direction perpendicular to the bottom plate of the sliding member, it engages with the inner surface of the other side plate, but does not engage with the inner surface of the other side plate when it is tilted up in the other direction. A first holding member having a second engaging portion, and further having a concave portion formed on the side opposite to the insertion portion;

An insertion portion inserted into the recess of the first holding member; A first engaging portion that engages with an inner surface of the concave portion when the first pressing member is to be tilted and pulled up in the same direction as the other direction on the same side as the second engaging portion. A second engaging portion that does not engage with the inner surface of the concave portion when the first pressing member is inclined at the same side as the first engaging portion in the same direction as the one direction and is to be pulled up. A second holding member having: and

Greenhouse plastic in which one plastic film is sandwiched between the base member and the first pressing member, and the other plastic film is sandwiched and fixed between the first pressing member and the second pressing member. Provides a film stop.

In a seventh aspect, the invention provides a greenhouse plastic film stopper according to the sixth aspect, wherein the base member, the first holding member, and the second holding member are made of a metal material.

According to claim 8, when a protrusion is formed on the upper surface of the bottom plate portion of the base member, and the first holding member is inclined in the other direction and pulled up, the protrusion is formed. 8. The stopper for a greenhouse plastic film according to claim 6, wherein a protrusion engaging the portion is provided on an outer surface of the insertion portion of the first holding member. According to claim 9, when the insertion portion is inserted between the side plate portions of the base member into one of the engagement portions of the insertion portion of the first pressing member, the insertion portion projects outward from between the side plate portions, A protruding piece having a bent portion bent inward, and an engagement portion on the side of the insertion portion of the second pressing member facing the protruding piece formed on the first pressing member, and The greenhouse plastic film stopper according to any one of claims 6 to 8, further comprising a protruding piece having a bent portion.

Claim 10 is a method for stretching a plastic film using the stopper for the greenhouse plastic film according to any one of claims 6 to 9,

After locating the vicinity of the other end of the one plastic film whose one end is fixed at an appropriate position on the base member, the insertion portion of the first holding member, the second engagement portion side, A step of inserting between the side plates of the base member so as to be located on the other end side of each plastic film, and positioning the vicinity of one end edge of the other plastic film on the recess of the first holding member. Inserting the insertion portion of the second holding member into the concave portion such that the first engagement portion side is located on the opposite side to the one edge of the other plastic film. A method for stretching a greenhouse plastic film, comprising: fixing a plastic film in a proper place.

"Brief description of the drawings"

FIG. 1 is a perspective view showing a stopper according to the first embodiment of the present invention. FIG. 2 is a perspective view for explaining a method of stretching a plastic film using the stopper according to the embodiment.

FIG. 3 is a perspective view showing a stopper according to the second embodiment of the present invention. FIG. 4 is a perspective view for explaining a method of stretching a plastic film using the stopper according to the embodiment.

FIG. 5 is a perspective view showing a stopper according to the third embodiment of the present invention. FIG. 6 is a front view showing the stopper according to the embodiment.

FIG. 7 is a perspective view showing a stopper according to a fourth embodiment of the present invention. FIG. 8 is a perspective view for explaining a method of stretching a plastic film using the stopper according to the embodiment.

FIG. 9 is a perspective view showing a stopper according to a fifth embodiment of the present invention. FIG. 10 is a perspective view for explaining a method of stretching a plastic film using the stopper according to the embodiment.

FIG. 11 is a perspective view for explaining a conventional method of stretching a plastic film using a stopper. "Best mode for carrying out the invention"

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. FIGS. 1 and 2 are views showing a stopper member 1 for a greenhouse plastic film according to a first embodiment of the present invention, which is configured to include a base member 2 and a holding member 3. The base member 2 has a predetermined length, a bottom plate portion 21, and a side plate portion 2 2 raised from each side edge of the bottom plate portion 21 so as to form an acute angle with the bottom plate portion 21. , 23. The side plates 22 and 23 are further raised so as to maintain a predetermined interval between the upper edges 22a and 23a. That is, the base member 2 has a substantially triangular shape with the bottom plate 21 as the base when viewed in cross section, but has a shape in which the vicinity of the top is cut off. Further, in the present embodiment, two protrusions 21 a and 21 b are formed on the upper surface of the bottom plate 21 along the longitudinal direction at predetermined intervals in the width direction. Further, the upper edges 22a and 23a of the side plates 22 and 23 are also formed so as to swell in the longitudinal direction. In addition, each of the ridges 21a and 21b and the upper edge 22a and 23a has a rounded tip surface so as not to damage the plastic film. In addition, the base member 2 has a tapered portion with a flared lower portion under the upper edges 22 a, 23 a than the distance between the upper edges 22 a, 23 a of the side plates 22, 23. It is only necessary that the opposing interval between the tapered portions is wider than the opposing interval between the upper edges 22a and 23a. As in the present embodiment, the entire side plate portions 22 and 23 are not necessarily formed as a whole. It does not need to be in the shape of a letter.

The holding member 3 has substantially the same length as the base member 2, and has an insertion portion 31 having a substantially semicircular cross section, and an outer portion that is once bent inward from one of the upper edges of the insertion portion 31. And a protruding piece 32 extending therefrom. The insertion portion 31 is formed to be large enough to be accommodated in a space surrounded between the bottom plate 21 of the base member 2 and the two side plates 22, 23. c is located between the two ridges 21a, 21b of the base member 2, and the protruding piece 32 is located at the upper edge 22a, 23 of the side plate 22, 23. It is arranged to get over either one of a.

The upper edge of the insertion portion 3 1 on the side where the protruding piece 3 2 is not continuously provided functions as a first engagement portion 3 1 a, and is bent inward once to protrude the protruding piece 3 2. The other upper end edge functions as a second engagement portion 31b. The distance between the outer surfaces of the first engaging portion 31a and the second engaging portion 31b is determined by the upper edges 22a, 23a of the side plate portions 22, 23 of the base member 2. It is formed so as to be slightly wider than the interval between them. As a result, when it is pulled straight up in a direction perpendicular to the bottom plate 21, the first engagement portion 31 a and the second engagement portion 31 b force are respectively applied to the two side plate portions 2 2, 2 3 Abuts and engages the inner surface of the. On the other hand, when the protruding piece 32 is tilted up and lifted up, the second engaging portion 31b does not engage with the inner surface of the other side plate portion 23, and the upper end edge 2a, Although it is possible to escape from the gap of 23a, if it is attempted to incline in the opposite direction, the protruding piece 32 contacts the upper edge of the other side plate portion 23 to restrict its movement, The engagement portion 31 a contacts and engages with the inner surface of the one side plate portion 22.

According to the present embodiment, the plastic film is stretched as follows. The case where two plastic films A and B are stretched on the ceiling of a greenhouse is explained as an example. First, the base member 2 is previously arranged along the width direction at an appropriate place on the ceiling surface of the greenhouse. One end of plastic film A is fixed to the boundary between the ceiling and the wife of the greenhouse. Next, the operator holds the other plastic film B so as to overlap the one plastic film A, and places an opening between the side plates 22 and 23 of the base member 2 near the other edge of the two films. Place on top. Next, the insertion portion 31 of the pressing member 3 is set so that the second engagement portion 31b is located on the other end side of the film, and the other end edge of each film is in the second engagement portion. The base member 2 is inserted between the side plate portions 22 and 23 so as to slightly protrude from the joint portion 3 1 b and the other side plate portion 23 of the base member 2. At this time, since the bottom plate 21 of the base member 2 is formed with the two ridges 21a and 21b, the outer peripheral surface of the insertion portion 31 having a substantially semicircular cross section is formed of the plastic film A. , The two ridges 21a and 21b are in contact with each other via B, and are positioned at predetermined positions. Next, the other plastic film B pulled out from one side plate portion 22 of the base member 2 and the first engagement portion 31b of the pressing member 3 is folded back, and the side plate portions 22 of the base member 2 are turned off. 3 Pull to the left side of the figure so as to straddle the space between the upper edges. Finally, another plastic film (see FIG. 2) is attached to another stopper (not shown) arranged at a predetermined distance from the stopper 1 shown in FIG. (Not shown) together with the edge as described above. When the plastic film for forming the ceiling surface is to be stretched, this operation is repeated until the other side of the greenhouse is stretched, and a plurality of plastic films are stretched.

As a result, if the stretched plastic films A and B flap due to wind or the like and tension is applied to each of the plastic films A and B in the direction of the arrow in FIG. 2, the second of the base member 2 and the holding member 3 Since the area of the portion protruding from the engaging portion 3 1c is small, the force such that the first engaging portion 3 1b side of the holding member 3 is inclined and pulled up from the bottom plate 21 of the base member 2. Works greatly. However, at this time, since the first engagement portion 3 1 b of the holding member 3 is engaged with the inner surface of the one side plate portion 22 of the base member 2, the holding member 3 does not detach from the base member 2, Both plastic films A and B are maintained in a state of being sandwiched between the base member 2 and the pressing member 3.

Further, the first engaging portions 31b of the pressing member 3 contact the plastic films A and B not in point contact but in a linear manner (surface). Therefore, the plastic films A and B are less likely to be partially worn out and torn as compared with the case where a spring member processed into a conventional chevron shape is used, and a polyolefin-based film is used as the covering material. It is suitable for the case.

When removing the stretched plastic films A and B, fix one end of one plastic film A and one end of the other plastic film B. If the portion protruding from the other side plate portion 23 of the base member 2 and the second engagement portion 3 1 b of the holding member 3 is pulled up, the protruding piece 32 of the holding member 3 is moved to the lower surface. , And the second engaging portion 31b is pulled up. When the second engaging portion 31b is brought into contact with the inner surface of the other side plate portion 23 when the second engaging portion 31b is lifted up in such a manner, the second engaging portion 31b does not engage with the inner surface of the other side plate portion 23. Is easily detached. Thereby, the fixing of the other end edges of the plastic films A and B is released. Next, a second embodiment of the present invention shown in FIGS. 3 and 4 will be described. In the present embodiment, in addition to the base member 2 having exactly the same shape as that of the first embodiment, the first pressing member 3 which is a pressing member having exactly the same shape as that of the first embodiment, and furthermore, The second pressing member 4 is used.

The second holding member 4 has a size such that the insertion portion 31 of the first holding member 3 is formed in a substantially semicircular cross section as described above, so that it can be accommodated in the concave portion 35 formed on the opposite surface. It has an insertion portion 41 having a substantially arc-shaped cross section. Then, one upper end edge of the insertion portion 41 functions as a first engagement portion 41a, and the other upper end edge functions as a second engagement portion 41b. The distance between the outer surfaces of the first engaging portion 41a and the second engaging portion 41b is determined by inserting the base member into the recess 35 of the first holding member 3 as described later. When the member 2 is pulled straight up in a direction perpendicular to the bottom plate portion 2 1, the first engagement portion 4

1a and the second engaging portion 41b correspond to the first engaging portion 31a and the second engaging portion 31b of the first holding member 3 corresponding to the inner surface of the concave portion 35. The inner surface is in contact with and engaged with the inner surface, but is formed at such an interval that it can be separated from the inside of the concave portion 35 when it is lifted up at an angle. The second engaging portion 41b, which is the other upper end edge of the insertion portion 41, is bent inward and then rises obliquely upward, and then is bent outward substantially horizontally. The protruding pieces 42 are continuously provided.

The second holding member 4 is connected to the first engaging portion 4 via a plastic film.

1a is the second engagement of the first holding member 3 in the recess 35 of the first holding member 3. The base member is positioned so as to be positioned on the same side as the portion 31b and the horizontal portion of the protruding piece 42 is positioned on the first engagement portion 31a side of the first pressing member 3. It is arranged so as to get over the upper edge of one side plate 22 (see Fig. 4). As a result, when the first engagement portion 41 a is inclined in a direction in which the first engagement portion 41 a is pushed up, the first engagement portion 41 a is formed on the inner surface of the recess 35, specifically, the first holding member 3. And abuts and engages with the inner surface of the second engaging portion 31b via a plastic film. When the second engaging portion 41b is inclined in a direction in which the second engaging portion 41b is pushed up, the inclination range of the protruding piece 42 is not restricted. The pressing member 3 is separated from the inside of the concave portion 35 without coming into contact with the inner surface of the concave portion 35 through the plastic film while being in contact therewith.

According to the stopper of the present embodiment, first, similarly to the above-described embodiment, the base member 2 is disposed along the width direction on the ceiling surface of the greenhouse. Next, one end of one plastic film A is fixed to the boundary between the ceiling surface and the end surface of the greenhouse, and the other end is positioned above the openings of the side plates 22 and 23 of the base member 2. Position. Next, the second engaging portion 31b and the protruding piece 32 of the first holding member 3 are positioned so as to be on the other end side of the one plastic film A, and the bottom plate 21 and the side plate are positioned. Insert the insertion part 31 into the space formed by the parts 22 and 23. At this time, the portion protruding from between the second engaging portion 31b of the first holding member 3 and the other side plate portion 23 of the base member 2 is not affected by wind or the like. Care should be taken to minimize the area of the part. As a result, when the one plastic film A flutters, a force that pushes up the first engaging portion 31a of the first holding member 3 (the force in the direction of the rightward arrow in FIG. 4). However, since the first engaging portion 3 la abuts on and engages with the one side plate portion 22 of the base member 2, the fixing of the one plastic film A is not released.

Next, the vicinity of one edge of the other plastic film B is placed on the first holding member 3. On the recessed part 35 to be cut. Then, the first engagement portion 41 a of the second holding member 4 is positioned on the second engagement portion 31 b side of the first holding member 3, and one end of the other plastic film B is Insert into the recess 35 so as to press down near the edge. At this time, care should be taken to minimize the area of the portion of the second holding member 4 protruding from the gap between the second engaging portion 41b and the concave portion 35. The other edge of the other plastic film B is connected to another stopper (not shown) arranged in parallel with the above stopper on the ceiling surface of the greenhouse, and near one edge of another plastic film (not shown). Fix with. As a result, when the other plastic film B flutters due to wind or the like, a force that pushes up the first engagement portion 41 a side of the second holding member 4 (force in the direction of the left arrow in FIG. 4). The first engaging portion 41a contacts and engages with the inner surface of the second engaging portion 31b of the first holding member 3 which is the inner surface of the concave portion 35. The sandwiched state of the other plastic film B is maintained.

When removing the two stretched plastic films A and B, in the case of one plastic film A, the second engaging portion 31b of the first holding member 3 and the other side plate of the base member 2 The portion protruding from the portion 23, and in the case of the other plastic film B, the portion protruding from the second engaging portion 41b of the second pressing member 4 and the recess 35 of the first pressing member 3. May be raised by the operator.

FIGS. 5 and 6 are views showing a stop member 1 for a greenhouse plastic film according to a third embodiment of the present invention. The base member 2 has a first pressing member 3 as a pressing member. The second embodiment is the same as the second embodiment in that the second pressing member 4 is used.

However, a projection 31 d is provided on the outer surface of the insertion portion 31 of the first holding member 3. In the case where a force (a force in the direction of the arrow pointing to the left in FIG. 5) is applied to the first holding member 3 so that the second engaging portion 3 1 b side is pushed up, the above-described embodiments will be described. Since the second engaging portion 3 1 b does not engage with the other side plate portion 23 of the base member 2, it is configured to be easily detached. Of course, as long as the plastic films A and B are properly stretched, there is usually no problem as described in the above embodiments, but the film tension may be loosened for some reason. Therefore, in the present embodiment, in order to cope with such a situation, the projection 31 d is formed just in case so that the film tension is not loosened and easily detached. . Therefore, when a force is applied to the first holding member 3 such that the second engaging portion 31b side is pushed up, the projection 31d is attached to any part of the base member 2. It is necessary to provide so. In the present embodiment, the projection 31 d is formed at a position where it comes into contact with one of the ridges 21 a of the base member 2 when such a force acts, but is not limited to this. Not something. For example, it may be formed at a position where it can come into contact with the other ridge 2 lb. It is to be noted that the force S for forming such a protrusion 31 d is preferable even when only one pressing member 3 is used as in the above-described first embodiment.

Further, in the present embodiment, as shown in FIGS. 5 and 6, the protruding piece 32 of the first holding member 3 is formed in a shape having a bent portion 32a bent inward. The protruding piece 42 of the member 4 is formed in a shape having a bent portion 42 a that is also bent inward. As a result, the two bent portions 32a and 42a are provided so as to face each other, and a metal fitting (panel or the like) for fixing a house band can be inserted and arranged between the two bent portions 32a and 42a.

FIGS. 7 and 8 are views showing a stop member 1 for a plastic film for a greenhouse according to a fourth embodiment of the present invention, which comprises a base member 2 ′ and a holding member 3. You.

The shape of the base member 2 ′ is substantially the same as that of the first embodiment described above, has a predetermined length, is raised from the bottom plate 21 ′ and both side edges at an acute angle, and the upper end edge 2 2 ′ a , twenty three It is configured to have side plate portions 22 ′, 23 ′ having a predetermined interval between “a”. However, unlike the first embodiment, a ridge for positioning the holding member 3 'is not formed on the bottom plate 21'.

The holding member 3 ′ includes a substantially arc-shaped insertion portion 31 ′, a first engagement portion 31 ′ a provided to protrude downward from both side edges of the insertion portion 31 ′, and a second engagement portion. And a joining portion 31'b. When the longitudinal center of the insertion portion 31 1 and the longitudinal center of the bottom plate 2 1 ′ of the base member 2 ′ substantially coincide with each other, the first engagement portion 3 1 ′ a The second engagement portion 3 1 ′ b extends almost straight downward and then near the front end, so that the second engagement portion 3 1 ′ b extends substantially straight downwards near the boundary between 2 1 ′ and one side plate portion 22 ′. Project slightly outward. The distance between the outermost protruding portions of the first engaging portion 31 ′ a and the second engaging portion 31 ′ b is orthogonal to the bottom plate 21 ′ of the base member 2. When the first engaging portion 31′a and the second engaging portion 31′b are both pulled straight up in the direction in which the base plate 2 is engaged with the inner surface of the side plate portions 22 ′, 23, It is formed to the extent that it matches. Further, projecting pieces 32 ′, 33 ′ are formed on the upper end edge of the insertion portion 31 ′, and protrude to both sides around the upper end edge along the longitudinal direction.

Therefore, in the present embodiment, as in the first embodiment, two plastic films are provided above the upper edge 22'a, 23'a of the side plate portions 22 ', 23, of the base member 2'. The plastic films A and B are inserted in such a manner that the plastic films A and B are pressed by the insertion portions 31 ′ of the pressing members 3, which are located near the edges of A and B. When the plastic films A and B flap and a force (a force in the direction of the arrow in FIG. 8) is applied to pull up the first engaging portions 31 and a, the first engaging portions 31 and a are moved. The plastic film A, B can be held without coming off from the base member 2 'because the 1'a is in contact with the inner surface of the side plate portion 22' through the plastic film. On the other hand, the second engaging portions 31 and b of the plastic films A and B and the base member 2 When the portion protruding from the other side plate portion 23 ′ is pulled up, the second engagement portion 31 ′ b is inclined so as to float, but the second engagement portion 31 ′ b Since it protrudes only slightly outward, it does not engage with the inner surface of the other side plate 23 ′, and separates from the space formed by the bottom plate 21 ′ and the side plates 22 ′, 23 ′. Next, a fifth embodiment of the present invention shown in FIGS. 9 and 10 will be described. In the present embodiment, the force of the base member 2 ′ having exactly the same shape as that of the above-described fourth embodiment, and the force of the first pressing member 3 ′ that is the pressing member having exactly the same shape as in the fourth embodiment, Further, a second pressing member 4 'is used.

The second holding member 4 'has the same shape as the holding member 4 of the second embodiment described above, and is formed on the surface opposite to the insertion portion 3 1' of the first holding member 3 '. The insertion portion 41 ′ has a substantially arc-shaped cross section and is small enough to fit in the concave portion 35 ′.

Then, the second pressing member 4 ′ has a first engaging portion 41 ′ a formed in a concave portion 35, of the first pressing member 3 ′ through a plastic film. And the horizontal portion of the projecting piece 42 ′ is located on the same side as the second engaging portion 3 1 ′ b, and the first engaging portion 31 ′ a side of the first holding member 3 ′ And is disposed above one of the protruding pieces 32 '. As a result, even if the first engaging portion 41'a is inclined in a direction in which the first engaging portion 41'a is pushed up, the horizontal portion of the protruding piece 42 'abuts on the upper surface of the one protruding piece 32' of the first pressing member 3 '. The first engaging portion 41 ′ a is in contact with the inner surface of the concave portion 35 ′ via the plastic film B, so that the first engaging portion 41 ′ a is in contact with and engaged with the inner surface of the concave portion 35 ′. If the second engaging portion 41'b is inclined in the opposite direction, that is, the direction in which the second engaging portion 41'b is pushed up, the inclination range of the protruding piece 42 'is not restricted. While being in contact with the inner surface of the concave portion 35 'of the holding member 3' via the plastic film B, it does not engage with the pressing member 3 ', but is separated from the concave portion 35. Therefore, the stopper film of the present embodiment can be provided with a plastic film stretched in exactly the same manner as in the above-described second embodiment.

Here, the base members 2 and 2 ′ and the holding members 3, 3 ′, 4 and 4 ′ constituting the stopper according to each of the above-described embodiments can be formed of a hard resin, From the viewpoint, it is preferable that each of them is made of a metal material such as an aluminum plate. Also, in the above description, a case is described in which a plurality of plastic films forming the ceiling surface of the greenhouse are stretched, but it can be used as a stopper for the plurality of plastic films forming the side surfaces. Of course. When the plastic film that forms the side surface is to be stretched, for example, two plastic films for the upper and lower sides are prepared, and the stopper is horizontally arranged approximately at the center of the side surface. In order to prevent infiltration of the upper plastic film, it is preferable to stretch the upper plastic film at the overlapping portion of the upper plastic film and the lower plastic film fixed to the stopper so that the upper plastic film is located outside.

"Industrial applicability"

According to the stopper for a plastic film for a greenhouse of the present invention, since the pressing member and the base member are in contact with the plastic film not in dots but in a linear shape (surface), damage caused by rubbing of the film can be prevented. It can be reduced compared to the stop material. Therefore, it is suitable as a stopper for a polyolefin-based plastic film that is weak against rubbing friction. In addition, since it is possible to fix the vicinity of one edge of two adjacent plastic films with one stopper, there is no need to additionally provide a stopper.

Claims

The scope of the claims

1. A stopper for fixing the plastic film that is the covering material of the greenhouse.

It has an insertion portion inserted between the side plate portions, and has an insertion portion on one side portion of the insertion portion, which is engaged with the inner surface of one side plate portion when pulled up in a direction orthogonal to the bottom plate portion of the base member. And a first engaging portion that engages with the inner surface of the one side plate portion to regulate the inclination even when trying to pull it up in one direction, and a base is provided on the other side portion of the insertion portion. When it is lifted in the direction perpendicular to the bottom plate of the sliding member, it engages with the inner surface of the other side plate, but does not engage with the inner surface of the other side plate when it is tilted up in the other direction. A holding member having a second engagement portion, and

A stopper for a greenhouse plastic film, wherein the plastic film is sandwiched and fixed between a base member and a holding member.

2. The stopper for a greenhouse plastic finolem according to claim 1, wherein the base member and the holding member are made of a metal material.

3. A projecting portion is formed on the upper surface of the bottom plate portion of the base member, and the projecting portion is pulled by the projecting portion when the holding member is inclined upward in the other direction. 3. The stopper for a greenhouse plastic film according to claim 1, wherein the stopper is provided on an outer surface of an insertion portion of the holding member.

4. When the insertion portion is inserted between the side plate portions of the base member into any of the engagement portions of the insertion portions of the holding member, the insertion portion projects outward from between the side plate portions and is bent inward. The greenhouse plus according to any one of claims 1 to 3, further comprising a protruding piece having a portion. Chick film stopper.

5. A method for stretching a plastic film using the greenhouse plastic film stopper according to any one of claims 1 to 4,

Another plastic film, which is disposed adjacent to the plastic film whose one end is fixed in place, is superimposed, and the vicinity of each of the superimposed other ends is positioned on the base member. The insertion portion is inserted between the side plate portions of the base member such that the second engagement portion side is located on the other end edge side of each of the plastic films, and the vicinity of the other end edges of the two plastic films are joined together. Fixing, folding another plastic film pulled out from between the first engagement portion of the insertion portion and the base member so as to straddle the space between the upper edges of the side plate portions of the base member, and near one end edge thereof Fixing a plastic film in place. A method for stretching a greenhouse plastic film, comprising:

6. Stopping material for fixing the plastic film that is the covering material for greenhouses.

It has an insertion portion inserted between the side plate portions, and has an insertion portion on one side portion of the insertion portion, which is engaged with the inner surface of one side plate portion when pulled up in a direction orthogonal to the bottom plate portion of the base member. And a first engaging portion that engages with the inner surface of the one side plate portion to regulate the inclination even when trying to pull it up in one direction, and a base is provided on the other side portion of the insertion portion. When it is lifted in the direction perpendicular to the bottom plate of the sliding member, it engages with the inner surface of the other side plate, but does not engage with the inner surface of the other side plate when it is tilted up in the other direction. A first holding member having a second engagement portion, and further having a concave portion formed on the opposite surface side of the insertion portion; A first insertion portion inserted into the concave portion of the first holding member, and a second engagement portion of the first holding portion in the insertion portion and the other side, The first engaging portion that engages with the inner surface of the concave portion when inclined and pulled up in the same direction is provided on the same side as the first engaging portion of the first pressing member, and A second holding member having a second engaging portion that does not engage with the inner surface of the concave portion when tilting and pulling up in the same direction;

A plastic film for greenhouses in which one plastic film is sandwiched between the base member and the first holding member and the other plastic film is sandwiched between the first and second holding members and fixed. Stopping material.

7. The stopper for a greenhouse plastic film according to claim 6, wherein the base member, the first holding member, and the second holding member are made of a metal material.

8. A protrusion is formed on the upper surface of the bottom plate portion of the base member, and when the first holding member is to be inclined in the other direction and pulled up, the protrusion is pulled to the protrusion. 8. The greenhouse plastic film stopper according to claim 6, wherein the protrusion is provided on an outer surface of the insertion portion of the first holding member.

9. When the insertion portion is inserted between the side plate portions of the base member into any of the engagement portions of the insertion portion of the first holding member, the insertion portion projects outward from between the side plate portions and bends inward. A protruding piece having a bent portion formed on the side of the insertion portion of the second pressing member, the engaging portion on the side facing the protruding piece formed on the first pressing member. The stopper for a greenhouse plastic film according to any one of claims 6 to 8, further comprising a projecting piece having a bent portion.

10. A method of stretching a plastic film using the stopper for a greenhouse plastic film according to any one of claims 6 to 9,

After locating the vicinity of the other end of the one plastic film whose one end is fixed at an appropriate position on the base member, the insertion portion of the first holding member, the second engagement portion side, A step of inserting between the side plates of the base member so as to be located on the other end side of each plastic film, and positioning the vicinity of one end edge of the other plastic film on the recess of the first holding member, The insertion portion of the holding member is inserted into the concave portion such that the first engagement portion side is located on the side opposite to one end edge of the other plastic film, and the vicinity of the other end edge of the other plastic film is put in place. A method for stretching a greenhouse plastic film, comprising the step of fixing.