JPH048759Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a seat fixing device.
More specifically, this invention relates to a sheet fixing device used for fixing a plastic sheet or film to a frame made of round rods for greenhouse cultivation or the like.

(Prior Art) Various structures of seat fixing devices are already known. The simplest one is a seat fixing tool made by cutting out a part of a hard synthetic resin or metal cylinder along the axial direction. This fixture is made by attaching a plastic sheet to a frame made of round rods.
This is a type of sheet that can be fixed simply by putting this over it. However, this type of device cannot exert sufficient fixing force. This is because with this type of seat fixture, if the tightening force of the seat fixing tool is increased, there is a risk of the seat breaking during fitting.

Therefore, in order to compensate for this drawback, it has been proposed to fit a cylindrical fixture as described above and then fit a spring thereon to increase the tightening force. This proposal, for example,
It is described in Publication No. 13799. However, according to this proposal, the cylindrical fixture would have to be made of synthetic resin and the spring would have to be made of metal, so the two would be separate, which would not only make assembly difficult, but also cause the metal to rust. become unusable,
There was a drawback.

In Japanese Utility Model Publication No. 55-90276, the locking part and the tightening part are made separately from synthetic resin, and the locking part is composed of a C-shaped body with a circular cylinder cut out. The document describes a seat fixing device that is constructed with a similar C-shaped cross section, both parts of which are joined by a hinge, and the tightening part is placed over the locking part. However, the hinge used in this fixture has a protruding shaft at a position diametrically opposed to the outer surface of one end in the direction of the central axis of the locking part, and a protruding shaft on the other end in the direction of the central axis of the tightening part.
The structure is such that the bases protrude at diametrically opposed positions, and a hole is drilled in the base and a protruding shaft is inserted into the hole and attached to the shaft. Therefore, this hinge has a disadvantage in that it has a complicated structure and requires time and effort to assemble the fixture.

Further, Japanese Utility Model Application Publication No. 54-112964 describes a seat fixing device in which a pair of left and right pinching pieces are formed symmetrically and a thin hinge portion is provided between them to form an integrated sheet fixing device. However, since this seat fixing device has symmetrical pinch pieces, a complicated mechanism is required to keep the pinch pieces closed, and it is also time-consuming to use. There was a drawback. In other words, in order to maintain the pinch pieces in a closed state, it is necessary to have an inverted U-shaped locking piece protruding from one side, and a through hole for inserting the locking piece to be provided on the other side. Therefore, it becomes a complicated mechanism,
The drawback was that it required time and effort to manufacture. Also,
In use, it is necessary to pass the locking piece through the hole and make it protrude, and then insert the locking rod into the U-shaped hole, which has the disadvantage of requiring time and effort. .

(Problems to be solved by the invention) This invention attempts to solve the above-mentioned drawbacks, and is easy to manufacture, easy to install, and does not rust like metal. The purpose of this invention is to provide a seat fixing device that can withstand long-term use without having to use the seat.

(Means for solving the problem) The inventor proposes to make a fixture made of synthetic resin, which consists of a locking part and a tightening part, and is fixed by placing the clamping part over the locking part. did. At that time, it was discovered that it would be convenient to use the locking part and the tightening part by making them integrally from synthetic resin and connecting them with a hinge. Furthermore, this inventor proposes that for tightening, the wall thickness of the fastener should be larger than the wall thickness of the locking tool, and the opening of the fastener should be narrowed to press the opening of the fastener. I confirmed that it is good.
This invention was made based on such knowledge.

This device consists of a locking part, a hinge part, and a fastening part made of synthetic resin, and the locking part is made by cutting out a part of a round cylinder along the axial direction. The hinge part is made of a thin piece protruding along one side of the opening of the locking part, and the fastening part has a C-shaped cross section, and the fastening part has a C-shaped cross section. It is connected to the tip of the hinge part, and is positioned so that it overlaps the locking part when the hinge part rotates, making the wall thickness of the fastening part larger than the wall thickness of the locking part, and narrowing the opening of the fastening part. The present invention relates to a seat fixing device characterized in that the opening of the locking portion is narrowed by narrowing the opening of the locking portion.

(Example) An example of implementing this invention will be described below based on the drawings. Figure 1 shows
FIG. 2 is a partially cutaway perspective view of the seat fixing device according to the invention. FIG. 2 is a side view of the seat fixing device according to the invention in use.

In FIGS. 1 and 2, 1 is a locking part, 2 is a hinge part, and 3 is a fastening part. The locking part 1 and the fastening part 3 are connected to each other by a hinge part 2 and are made of synthetic resin, particularly hard synthetic resin. The locking portion 1 is formed by cutting out a part of a cylinder along the axial direction, and forming an opening 11 in the notch. The hinge part 2 is connected to the opening 1 of the locking part 1.
It consists of a thin piece protruding along one side of 1. The fastening portion 3 has a C-shaped cross section;
It is connected to the tip of the hinge portion 2 on one side of the opening 31 in the opening 31 and is positioned so as to overlap the wall portion of the locking portion 1 when the hinge portion 2 rotates. Furthermore, the wall thickness of the fastening part 3 is made larger than the wall thickness of the locking part 1, and the opening 31 of the fastening part 3 is made narrower, so that the opening 31 is forcibly expanded to engage the inner cavity of the fastening part 3. When the locking part 1 is inserted, the fastening part 3 presses the locking part 1 to narrow the opening 11 of the locking part 1. The seat fixing device according to this invention has such a structure.

As mentioned above, the locking part 1 is a circular cylinder provided with an opening 11, and its cross section is larger than a semicircle. Reinforcing ribs 13 are attached to both ends of the locking portion 1 in the axial direction. A thin wall portion 12 is formed between the reinforcing ribs 13. The locking part 1 is
A structure in which a connecting rod 4 extending in the axial direction from both ends of the opening 11 is provided, and a similar locking part 1 is attached at the tip of the connecting rod 4, so that the two locking parts 1 are paired by the connecting rod 4. may be taken as

The hinge portion 2 includes reinforcing ribs 13 in the locking portion 1.
It is not provided on the sides of the thin wall portion 12, but is provided protruding only on the sides of the thin wall portion 12. The thickness of the hinge part 2 is a fraction of the thickness
mm or less, and the protruding width is several mm.
This is to make the hinge portion 2 bendable.

The fastening portion 3 has an axial length equal to or less than the length of the thin wall portion 12 of the locking portion 1, and is configured to fit between the reinforcing ribs 13. The length of the fastening part 3 in the circumferential direction, together with the width of the hinge part 2, is equal to or less than the entire length of the locking part 1 in the circumferential direction. However, the circumferential length of the fastening portion 3 alone must be at least half of the circumferential length of the locking portion 1 when in use. The thickness of the fastening portion 3 is made larger than the thickness of the reinforcing rib 13.

Similar to the locking part 1, the fastening part 3 has reinforcing ribs (not shown) extending in the circumferential direction at both ends in the axial direction.
may be provided. In the fastening part 3, the opening 3
A handhold portion 32 that projects outward is provided on the side edge opposite to the hinge portion 2 among both side edges of the device 1, and a hook portion 33 that projects inwardly is provided. A recess 14 is provided on the outer surface of the locking part 1 to correspond to the hooking piece 33.

(Function) The seat fixing device according to this invention is used as shown in FIG. First, a plastic sheet b is brought into contact with round rods a that form the frame of the vinyl house. The locking part 1 of the seat fixing device according to the present invention is placed over the sheet b, the opening 11 is forcibly opened, and the sheet b is inserted together with the round rod a into the inner cavity of the locking part 1.
In this way, sheet b is temporarily fixed on round bar a. After that, the fastening part 3 is rotated by the rotation of the hinge part 2.
is placed over the locking part 1, the opening 31 is widened, and the locking part 1 is inserted into the inner cavity of the fastening part 3. Furthermore, the clue part 3
2 to fit the hook piece 33 into the recess 14. Then, the opening of the locking part 1 is narrowed by the fastening part 3, and the sheet b is strongly fixed on the round bar a. Thus, the seat fixing device according to this invention is used to fix the seat on the round bar.

Various resins can be used as the resin constituting the seat fixing device according to this invention. Examples include hard vinyl chloride resin, polyethylene,
Polypropylene, polyamide, ABS resin, etc. can be used. Among them, the preferred one is
Polypropylene and polyethylene are preferred, with polypropylene being particularly preferred.

(Effects of the invention) According to this invention, the locking part, hinge part, and fastening part are made integrally, so there is no need to combine separate parts when using it, making it convenient for fixing the seat. . In addition, since it is entirely made of synthetic resin, it can be made all at once by molding, making it easy to manufacture.It also does not rust or corrode even when exposed to wind and rain, making it beautiful and long-lasting. be able to. Furthermore, since the locking part and the fastening part are separated and the locking part is placed over the sheet first, there is less risk of tearing the sheet when putting the locking part on. Furthermore, the thickness of the fastening part is made larger than that of the locking part, and the opening of the fastening part is made narrower, so the locking part firmly fixes the sheet. I will do it. Therefore, according to this invention, the effect that the sheet can be easily and firmly fixed on the round bar for a long time is brought about.

In addition, the locking parts of two seat fixing devices according to this invention are connected together by two connecting rods 4, and the seat can be fixed over a wide range with the two seat fixing devices. Since the sheet can be fixed, the sheet can be fixed even more firmly and reliably.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of the seat fixing device according to this invention. FIG. 2 is a side view of the seat fixing device according to the invention in use. In the figure, 1 is a locking part, 2 is a hinge part, and 3 is a fastening part.

Claims (1)

[Scope of utility model registration request] It consists of a locking part, a hinge part, and a fastening part made of synthetic resin, and the locking part has an opening made by cutting out a part of a round cylinder along the axial direction. , the hinge part consists of a thin piece protruding along one side of the opening of the locking part, and the fastening part has a C-shaped cross section, and the fastening part has a C-shaped cross section, and the fastening part is made of a thin piece protruding along one side of the opening of the locking part, and the fastening part has a C-shaped cross section. It is connected so that it overlaps the locking part by rotation of the hinge part, and the thickness of the fastening part is made larger than the wall thickness of the locking part, and the opening of the fastening part is narrowed so that the locking part A seat fixing device characterized by narrowing the opening of the seat.