JPH048760Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a holding tool for holding and fixing a plastic sheet extending to a bone member having a T-shaped cross section in a plastic tunnel for open field cultivation.

(Prior art) When covering the upper surface of a ridge in a field with a plastic sheet, a plurality of arch-shaped bone members are erected in the direction of the ridge, and the plastic sheet is stretched over the upper surface of the bone member to form a plastic tunnel. ing.
Conventionally, cylindrical pipes made of synthetic resin have often been used as the bone members of this plastic tunnel.

However, in addition to the above-mentioned cylindrical pipe, bone members having a T-shaped cross section, which are lightweight and have excellent installation stability, have now been used as bone members for plastic tunnels.

As a holding tool for fixing a plastic sheet to a bone member having a T-shaped cross section, there is, for example, a holding tool as disclosed in Japanese Utility Model Application Publication No. 104872/1983.

This holder has a long C-shaped cross section with an appropriate length, one side of which is shallowly curved, and the other side of which is deeply curved.

(Problem to be solved by the invention) However, since the holding device of Utility Model Application No. 52-104872 is only formed in a long C-shape in cross section, this holding device can be If a strong force is applied to the holder, it may expand in one direction or the other and fall off the head of the T-shaped bone member, and the plastic sheet cannot be securely attached to the T-shaped bone member. There was an issue that it was difficult to hold and attach.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a holding tool that can securely hold and secure a plastic sheet even when used on a bone member having a T-shaped cross section.

(Means for Solving the Problems) A holding device according to this invention is constituted by split first and second holding members each having a thick wall and a substantially U-shaped cross section. - The other protruding part of the second holding member is formed shorter than the one protruding part to form a gap therebetween, and a flange groove surrounded by the one protruding part and the other protruding part is formed;
A T-shaped groove is formed by this flange groove and the gap, and a fitting hole and a fitting hole that can be removably fitted to the opposing parts of one of the protrusions of the first and second holding members are formed. It forms a piece.

(Function) In this invention, due to the above configuration, the cross section T
A plastic sheet attached to the outer surface of the flange portion of the bone member can be held by the bone member in a state where it is in contact with the outer surface of the bone member.

(Embodiment) FIG. 1 is an overall perspective view of a holding tool showing one embodiment of the present invention, and FIG. 2 is a perspective view of one holding member constituting the holding tool.

Reference numeral 1 indicates a holding tool main body, and this holding tool 1 is composed of a first holding member 2 and a second holding member 12.

The first holding member 2 has a thick wall and a substantially U-shaped cross section, and is molded from hard synthetic resin. The opposing protrusions 3 and 4 of the first holding member 2 have different protrusion widths, and one protrusion 3 is different from the other protrusion 4.
It is formed longer in the protruding direction than the

One of the protrusions 3 is formed with a fitting hole 3A that is cut out in a substantially dovetail shape and opens in the protruding direction. has been done.

Further, a fitting piece 3B having a shape obtained by rotating the fitting hole 3A clockwise by 180 degrees, that is, a substantially dovetail shape, is formed adjacent to one vertical side surface of the fitting hole 3A.

At one end in the longitudinal direction of the protruding portion 3, an engaging piece 3C adjacent to the other opposing side of the fitting hole 3A is provided.
An engagement hole 3D having the same shape as the engagement piece rotated 180 degrees clockwise is formed at the other end adjacent to the engagement piece 3B.

That is, the engaging piece 3C is formed to gradually become wider from the base end to the distal end, and conversely, the engaging hole 3D is formed to become gradually narrower in the direction of the base end.

Further, on the outer surface 3b of the dovetail-shaped fitting piece 3B, a thick rectangular overlapping piece 5 is formed so as to protrude outward from the tip end face _3b1 of the fitting piece 3B.

Further, a notch hole 6 notched in the wall thickness direction is formed adjacent to the overlapping piece 5 at the tip of the fitting piece 3B, and this notch hole 6 is formed to be open at least in the direction in which the protruding portion 3 protrudes. has been done.

The other second holding member 12 that constitutes the holding tool 1
has the same shape as the first holding member 2.

That is, it is formed into a thick, substantially U-shaped cross section, and one protrusion 13 is formed longer in the protrusion direction than the other protrusion 14 , and the first holding member 2 is attached to this protrusion 13 .
A substantially dovetail-shaped fitting piece 13B similar to the above, a substantially dovetail-shaped fitting hole 13A, an engagement piece 13C, and an engagement hole 13D are formed.

Further, similarly, an overlapping piece 15 is formed on the outer surface 3b of the fitting piece 13B, and a notch hole 16 is formed at the tip thereof.

As shown in FIG. 1, the first holding part 2 and the second holding member 12 have a fitting piece 13B of the second holding member 12 in the fitting hole 3A and the engaging hole 3D of the first holding member 2.
and the engagement piece 13C is inserted into the fitting hole 13A and the engagement hole 13D of the second holding member 12.
The holding tool 1 of the present invention is formed by fitting the fitting piece 3B and the engaging piece 3C, respectively. In this case, the protruding portions 5a, 15a of the overlapping pieces 5, 15
overlaps with the base end portions of the mating holding members 2, 12 forming the fitting holes 3A, 13A.

In the holding tool 1 formed by the first holding member 2 and the second holding member 12, there is a gap 1A formed between the other protrusions 4 and 14, and the protrusions 3 and 13 , 4, and 14 is formed, and the flange groove 1B and the gap 1A are formed in a T-shape.

The gap 1A is formed to have a size sufficient to surround the leg end of the T-shaped bone member, and the flange groove 1B surrounds the flange portion of the bone member.

Next, the usage state of the holding tool 1 having the above structure will be explained according to the usage state diagram of FIG. 3.

A plurality of bone members 20 each having a T-shaped cross section are provided in the direction of the ridge to bridge the ridge in an arch shape in the direction of the ridge, and a plastic sheet 21 is attached to the outer surface of the flange portion 20A of the bone member 20. Stretch the plastic sheet 21.

Then, the first
Fitting holes 3A, 1 of holding member 2 and second holding member 12
3A, fitting pieces 3B, 13B and engagement holes 3D, 1
3D and the engaging pieces 3C, 13C are fitted, and the holding tool 1
The flange portion 20 of the bone member 20 is inserted into the flange groove 1B of
A and the gap 1A surround the leg ends 20B of the bone member 20, and the holding tool 1 is held on the bone member 20. Therefore, the plastic sheet 21 is fixed to the bone member 20 in a state along the T-shaped inner peripheral surface of the holding tool 1, that is, the outer surface of the bone member 20.

The holding tool 1 has overlapping parts 5 and 1 on the fitting pieces 3B and 13B.
Plastic sheet 2 because it forms 5
1 is pulled in the direction of arrow A in FIG. The force applied by the fitting holes 3A, 13A and the fitting pieces 3B, 1 can be prevented.
3B, engagement holes 3D, 13D and engagement pieces 3C, 13C
The first and second holding members 2, 12 can be prevented from detaching by maintaining the fitted state with the first and second holding members 2, 12.

If the holding tool 1 is to be divided into the first holding member 2 and the second holding member 12 as necessary, insert a flathead screwdriver or the like into the notch holes 6 and 16 formed in the protruding pieces 3 and 13. Remove by inserting and twisting.

In the above embodiment, the first holding member 2 and the second holding member 12 are provided in the same shape to form the holding tool 1, but the holding tool 1 of FIG. Similarly, the holding tool 1 may be configured with holding members having different shapes, such as forming only a fitting convex portion on the first holding member 2 and only forming a fitting concave portion on the second holding member 12.

In addition, the fitting shape is similar to the embodiment shown in FIGS. 1 and 2, with fitting holes 3A, 13A and fitting pieces 3B, 13.
It is not necessary to form B into a substantially dovetail or dovetail shape;
As shown in the figure, it may be shaped like a fastener.

(Effects of the invention) As explained above, the holding device of the present invention opens only the portion corresponding to the leg end of the bone member having a T-shaped cross section, and leaves a gap at least equivalent to the thickness of the plastic sheet. a split first part surrounding the bone member;
and a second holding member, these first and second holding members.
Since the second holding member has a concavo-convex portion that can be removably fitted to the portion facing the outer surface of the flange portion of the bone member, the second holding member is attached to the outer surface of the flange portion of the bone member having a T-shaped cross section. The plastic sheet that has been
The plastic sheet can be held against the bone member while being abutted against the outer surface of the bone member. Therefore, the plastic sheet of the plastic tunnel using the bone member having a T-shaped cross section can be securely and firmly fixed to the bone member.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the holding tool, Fig. 2 is a perspective view of one holding member constituting the holding tool, Fig. 3 is a diagram of the holding tool in use, and Fig. 4 is a drawing of the holding tool. FIG. 3 is a perspective view showing another embodiment of the invention. 1... Holding tool, 2... First holding member, 1A...
Gap, 1B...flange groove, 3A, 13A...fitting hole, 3B, 13B...fitting piece, 12...second holding member, 13...one protrusion, 14...other protrusion , 20A...Flange portion, 21...Plastic sheet.

Claims (1)

[Scope of utility model registration request] A holding tool for holding a plastic sheet attached to the outer surface of a flange portion of a bone member having a T-shaped cross section in a state where it is along the outer surface of the bone member, the holding tool having a thick cross section. It is composed of split-shaped first and second holding members formed in a substantially U-shape, and the other protrusion of the first and second holding members is formed shorter than one of the protrusions so that they are mutually connected. A gap is formed therebetween, and a flange groove surrounded by the protrusions on one side and the other side is formed, and a T-shaped groove is formed by the flange groove and the gap. A holding device characterized in that a fitting hole and a fitting piece that can be removably fitted to each other are formed in opposing portions of one protruding portion of two holding members.