JP2009183252A - Clip for fixing plastic sheet of agricultural plastic greenhouse - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clip facilitating attachment to a pipe material for detachably fixing a pipe material to the end part of a plastic sheet of an agricultural plastic greenhouse, and capable of strengthening grasping power, preventing lowering of grasping power caused by aged deterioration, and extending the circumferential direction length of a grasping surface to the pipe material to a length almost equal to the perimeter of the pipe material. <P>SOLUTION: This plastic clip for fixing a plastic sheet of an agricultural plastic greenhouse is composed of a C-type clip body 10 and a metallic band 25. The clip is such that the clip body 10 has a back stripe groove 11 on the back, the bottom of the back stripe groove 11 is a thin flexible hinge part, and the back central parts of a plurality of metallic bands 25 are fixed to a bar-like member 30. The metallic band 25 is a C-type band and is engaged with the clip body 10, and the bar-like member 30 is injected into the back stripe groove 11 of the clip body 10 and detachably fixed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a clip for detachably fixing an edge of a vinyl sheet of an agricultural greenhouse to a pipe material (for example, a rolled-up pipe material) P, and the attaching / detaching operation to the pipe material P is extremely simple and easy. In addition, the gripping force of the clip is highly stable and does not loosen due to secular change.

  The structure of the agricultural greenhouse is as shown in FIG. 3, for example, and the edge of the vinyl sheet (for example, roof sheet) 100 is detachably fixed to the pipe material P by a number of clips C (for example, JP, 2001-120081, Japanese Patent No. 3049736). In the greenhouse of FIG. 3, the edge of the vinyl sheet 100 is wound around the winding pipe material P, and the clip C is fitted and fixed thereon, and when the winding device M is driven by the handle operating shaft 50, the winding device M Then, the pipe material P for winding is driven, and the vinyl sheet 100 is wound around the pipe material P.

Various specific structures of the above-described conventional clip C are known, but a thick plastic one is often used because it is easy to handle and inexpensive (Japanese Patent Publication No. 2-14009). 5 and 6 of the gazette gazette, and FIGS. 1 and 2 of the utility model registration No. 3076360 gazette. The cross-sectional shape of the clip C is C type or Ω type.
The conventional one illustrated in FIG. 4 is an Ω-type clip, and the pipe material P is press-fitted and fitted from the opening 63 between the left and right edges 60a and 60b of the clip body 60 to expand the entire clip from the opening 63. The pipe material P is fitted and the vinyl sheet 100 is fixed to the pipe material by the elastic restoring force of the clip body. Since the clip body is an Ω type, the circumferential length of the gripping surface by the clip body 60 with respect to the pipe material P can be increased, and the pipe material P can be easily pushed into the opening 63 between the left and right edges 60a and 60b. The smaller the width of the opening 63 between the left and right edges 60a, 60b, the longer the circumferential length of the gripping surface by the clip with respect to the pipe material P, which is advantageous for increasing the gripping effect. However, since it is difficult to fit the clip body 60 to the pipe material P, the width of the opening 63 is slightly smaller than the outer diameter of the pipe material P (for example, when the outer diameter of the pipe material P is 22.2 mm). The width of the opening 63 is 14.5 mm), which cannot be made too small.

Since the C-type or Ω-type clip is made of plastic, the gripping force can be strengthened by increasing the resistance to elastic deformation, but the gripping force decreases with the passage of time (due to the creep phenomenon of the plastic material), For this reason, there is a problem that due to the strong tension applied to the vinyl sheet, there is a problem that the pipe sheet P partially slips and shifts, and the vinyl sheet is partially loosened. Causes inconvenience that it becomes impossible to wind up evenly over the entire width due to partial slack.
On the other hand, if the gripping force is too strong, it becomes difficult to expand the clip, and as a result, it is difficult to attach and detach the pipe, and the work efficiency is impaired. Therefore, it is impossible to increase the gripping force in anticipation of a decrease in gripping force due to the aging of the clip C.

  Japanese Utility Model Publication No. 53-32142 discloses a composite of a clip body and a C-shaped metal band as a means for reducing the reduction in gripping force while further strengthening the gripping force of a plastic clip. What is described in the publication is a composite with a C-shaped metal band embedded in the inner surface of a C-shaped clip body, and is composed of an Ω-shaped clip body and a C-shaped metal band ( (See FIG. 4) is also in practical use.

  The conventional example shown in FIG. 4 is for a pipe material P having an outer diameter of 22.2 mm, for example, having a length of about 150 mm, and a metal band 61 having a width of 4 mm is embedded in the outer periphery of the clip body 60 and combined. The clip body 60 is weakened in elasticity and reinforced with a metal band 61 to ensure the required gripping force of the clip, thereby reducing the influence on the gripping force due to the aging of the clip body. However, since this device uses the repulsive force of the clip main body 60 to secure a required gripping force, it is inevitable that the gripping force of the entire clip decreases with the aging of this part.

  On the other hand, since the clip body 60 must grip the pipe material P evenly over its entire length, it must be hard as a whole. Therefore, the gripping force of the clip body itself is weakened to that extent. The gripping force by the metal band 61 cannot be increased. Therefore, also in the conventional example shown in FIG. 4, the influence of the aging deterioration of the clip main body on the gripping force can be greatly reduced, and the above-mentioned problem due to the aging deterioration of the clip main body cannot be solved.

In addition, the opening 63 between the left and right edges 60a, 60b of the clip body 60 is narrowed, and the circumferential length of the gripping surface of the clip body 60 with respect to the pipe material P is increased, so that the pipe material of the vinyl sheet 100 by the clip. The function of fixing to P is enhanced. However, if the opening 63 is narrowed, it is difficult to fit into and remove from the pipe material P. Therefore, the opening 63 cannot be further narrowed to increase the circumferential length of the gripping surface.
Japanese Patent Laid-Open No. 2001-120081 Japanese Patent No. 3049736 Japanese Patent Publication No. 2-14009 Utility Model Registration No. 3076360 Japanese Utility Model Publication No. 53-32142

  This invention makes it very easy and easy to attach the C-shaped clip made of plastic to the pipe material, can sufficiently strengthen the gripping force, and can prevent a decrease in gripping force due to its aging, Further, it is an object of the present invention to devise a clip structure so that the circumferential length of the gripping surface with respect to the pipe material can be made approximately the same as the entire circumference of the pipe material.

Means for solving the above-mentioned problem is a clip for detachably fixing a pipe material to the end of a vinyl sheet of an agricultural greenhouse, which is made of a plastic C-shaped clip body and a metal band clip. These are due to the following (a) to (d).
(A) There is a spine groove on the back of the clip body, and the bottom of the spine groove is a thin flexible hinge part,
(B) The central part of the back surface of the plurality of metal bands is fixed to the rod-shaped member,
(C) The metal band is a C-type band,
(D) The metal band is fitted into the clip body, and the rod-like member is press-fitted into the back muscle groove of the clip body and fixed detachably.
further,
(E) Side grooves parallel to the spine grooves are provided on the left and right outer surfaces of the clip body.

In addition, it is desirable to attach 2 to 3 metal bands to one rod-like member. Accordingly, a plurality of metal bands can be easily attached to the clip body, and the tightening force by the metal bands can be distributed almost evenly over the entire length of the clip body. In the case of using a single metal band, it is necessary to make the metal band wide and to make the spreading operation easy.
Moreover, although not necessarily a preferable form, when the metal band is provided with a projecting portion radially inward and functions as a wedge to be pushed into the spine groove, the rod-shaped member is not necessarily required.

  Because the clip body is made of plastic and is C-shaped, its left and right edges are close to each other, and since the back has a flexible hinge portion by the spine groove, the clip body is thick and sufficiently hard, It can be easily opened from side to side. Therefore, even if the clip body is sufficiently hard, it can be easily fitted into the pipe material.

  When the C-shaped clip body is fitted into the pipe material, almost the entire periphery of the pipe material is gripped by the clip body. Since only the metal band is expanded when the metal band is expanded and fitted to the clip body fitted to the pipe material, this expansion operation is relatively easy. After fitting the metal band into the clip body, the rod-shaped member and the metal band are fixed to the clip by pushing the rod-shaped member into the spine groove and fixing. Further, since the spine groove is pushed and widened by the wedge action of the rod-like member, the rigidity of the clip body against an external force for expanding the clip body is increased. Since the metal band can be easily attached, it can be made sufficiently strong. Therefore, even if there is no gripping force of the clip body, the pipe material is strongly gripped by the strength of the metal band. Therefore, the gripping of the clip body with respect to the pipe material is not loosened.

  For a plastic clip body, it is possible to make it hard without difficulty, so the gripping force by the metal band is almost uniform over the entire length of the clip body in the axial direction, and it is related to the passage of time. It is constant.

In addition, if side grooves parallel to the spine groove are provided on the left and right outer surfaces of the clip body, the bottom portion of the side groove is thin and relatively easily deformed, so the clip can be fitted into the pipe material. Becomes easier.
As for the metal band, if it is the Ω type, it is easy to press fit into the clip body, but if it can be easily fitted, there is no problem even if it is a C type band.

Example 1, Example 2 and Example 3 in which the present invention is applied to fix a greenhouse roof sheet to a winding pipe will be described with reference to FIGS. 1, 2, 2-1 and 2-2. To do.
[Example 1]
Example 1 is based on the clip body 10 made of vinyl chloride, the Ω-type metal bands 25 and 25, and the rod-shaped member 30, and is attached to the pipe material P having an outer diameter of 19.1 to 22.2 mm.
The C-shaped clip body 10 has an inner diameter in a free state of 18 mm, an outer diameter of 32.2 mm, and an overall length L of 60 to 150 mm. A longitudinal spine groove 11 is provided on the back surface of the clip body 10. The bottom of the spine groove 11 is a thin hinge portion 11a. Further, side grooves 12 similar to the back muscle groove 11 are provided on both left and right side portions of the back muscle groove, that is, on the outer surfaces of the left and right wings 10 a and 10 b of the clip body 10.
The spine groove 11 is an upward C-shaped groove having an inner diameter of 6 mm, the depth is 4 mm, and the opening width g is 5.5 mm. The side groove 12 is a lateral C-shaped groove having an inner diameter of 3 mm.

Two Ω-type metal bands 25, 25 are combined in a state of straddling the bar-shaped member 30, and the bar-shaped member 30 having a circular cross section is fixed to the lower surface of the center of the metal band 25 with a set screw 33. The metal band 25 is made of spring steel, the inner diameter in a free state is 30 mm, and the outer diameter of the rod-shaped member 30 having a circular cross section is 5.5 mm.
The inner diameter of the metal band 25 in the free state is smaller than the outer diameter of the clip body 10 in the state of being fitted to the pipe material P, and the metal band 25 is in an expanded state when the metal band 25 is fitted into the clip body 10.
The metal band 25 may be made of a thick metal wire or a narrow metal plate, but the metal band 25 of this embodiment has a thickness of 1 mm and a width of 5 mm. The width x between the tips of the left and right wings 25 a and 25 b is 23.2 mm, which is 9 mm smaller than the outer diameter of the clip body 10.
The width of the opening 10w between the left and right edges of the clip body 10 (the tips of the left and right wings 10a and 10b) is about 40 mm.

  The diameter of the rod-shaped member 30 is substantially the same as the inner diameter of the spine groove 11 when the clip body 10 is in a free state, but when the clip body 10 is fitted into the pipe material P, its left and right wings 10a and 10b are opened to the left and right. For this reason, the spine groove 11 is slightly crushed to be slightly thinner than the thickness of the rod-shaped member 30. The rod-shaped member 30 is fixed to the clip body 10 by fitting the metal band 25 to the clip body 10 and press-fitting the rod-shaped member 30 into the back muscle groove 11.

  Even if the width of the opening 10w between the left and right edges 10e, 10f of the clip body 10 is sufficiently small, the left and right wings can be easily opened with the hinge portion 11a at the bottom of the back muscle groove 11 as a fulcrum. Therefore, since the clip body 10 is easily expanded, the attachment to the pipe material is easy. Further, when the left and right wings 10a and 10b have the side grooves 12, the bottom portion is a flexible hinge, which is easier.

The clip body 10 is fitted to the pipe material P in a state where the lower end of the vinyl sheet (specifically, the roof sheet) 100 is wound, and then the two metal bands 25 and 25 are fitted to the clip body 10, and the rod-shaped member 30 is attached. These are fixed by press-fitting into the back muscle groove 11.
The rod-shaped member 30 is slightly longer than the clip main body 10, and one end thereof protrudes slightly from the end of the clip main body when fitted into the back muscle groove. In this way, by grasping one end of the rod-shaped member 30 and pulling it upward (upward in FIG. 1), the rod-shaped member 30 is easily detached from the spine groove 11, and the metal band is also easily removed.

[Example 2]
Since the rod-like member 30 of the first embodiment is press-fitted into the spine groove 11 and thereby has a function of fixing the metal band to the clip body and a wedge action, other structures that exhibit these functions are adopted. You can also Example 2 is an example thereof and is shown in FIG. This is a C-shaped protrusion 35a formed radially inward in the center of a metal band 35 having a width of 5 mm. The C-shaped protrusion 25a is press-fitted into the spine groove 11 of the clip body 10 to expand the spine groove 11. Functions as a wedge to be opened.

Example 3
In the third embodiment, two metal bands 45, 45 similar to the metal band 35 of the second embodiment are connected by a rectangular bar-shaped member 46, and the bar-shaped member 46 is fitted into the back muscle groove 41 of the clip body 40 and fixed. Is. Since the rod-shaped member 46 is pushed into the back muscle groove 41 and fixed thereto, it functions as a wedge. Therefore, unlike the C-shaped protrusion 35a of the metal band 35 of the second embodiment, the C-shaped protrusion 45a of the metal band 45 does not need to function as a wedge.
The bar-like member 46 is provided with two notches 46 a, and the C-shaped protrusion 45 a of the metal band 45 is fitted into the notch 46 a, whereby the metal band 45 is connected to the bar-like member 46.
In addition, the dimension in the above Example is an example and is a standard. The clip body should be selected as appropriate depending on the hardness of the material of the clip body and the hardness of the metal band, and in relation to the pipe diameter to be fixed, the thickness of the vinyl sheet, the hardness, and the like.

FIG. 3 is a perspective view of the first embodiment. Is an enlarged view of the clip body of FIG. The perspective view of the metal band of Example 2 FIG. 3 is a perspective view of Example 3. Is an overall perspective view of an agricultural greenhouse Is an enlarged view of the clip body of the prior art

Explanation of symbols

10: Clip body 10a: Left wing 10b of clip body 10: Right wing 10e of clip body 10: Left edge 10f: Right edge 10w: Opening 11: Back muscle groove 11a: Bottom of back muscle groove (thin hinge)
12: Side grooves 25, 35, 45: Metal band 25a: Metal band left wing 25b: Metal band right wing 30, 46: Rod member 100: Vinyl sheet C: Clip g: Opening width of spine groove P: Pipe material

Claims (4)

A plastic C-shaped clip body and a metal band clip for detachably fixing the pipe material to the end of the vinyl sheet of the agricultural greenhouse,
There is a spine groove on the back of the clip body, the bottom of the spine groove is a thin flexible hinge part,
The center part of the back of the metal bands is fixed to the rod-shaped member,
An agricultural greenhouse characterized in that the metal band is a C-shaped band, the metal band is fitted into the clip body, and the rod-like member is press-fitted into the back muscle groove of the clip body and is detachably fixed. Clip for fixing vinyl sheet.   The clip for vinyl sheet fixation of the agricultural greenhouse of Claim 1 by which the side groove | channel parallel to the said back groove | channel is provided in the left-right outer surface of the said clip main body.   The clip for fixing a vinyl sheet of an agricultural greenhouse according to claim 1, wherein the metal band is made of a metal plate or a metal wire.   The clip for fixing a vinyl sheet of an agricultural greenhouse according to claim 1, wherein the metal band is an Ω-type band.

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