JPH032115Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an arch-shaped structural member for a vinyl house, in which a dovetail support frame for pasting a vinyl sheet is integrally connected and fixed to the arch-shaped structural member of the vinyl house. The present invention relates to a device for connecting and fixing arch-shaped support frames together, and particularly to a device for connecting two arch-shaped members of a vinyl greenhouse used in a largely curved part of the arch members.

[Conventional technology]

In recent years, there has been proposed by the present applicant, Utility Model Application Publication No. 109755/1983, as a simple and reliable fixing means for vinyl sheets when constructing greenhouses and the like.

This involves covering a long rectangular structural member (rafter) with a dovetail groove on the top with a vinyl sheet, pushing the sheet into the dovetail groove, and attaching a synthetic resin protector with square grips from above to both ends. It is secured by the attached corrugated wire.

In this way, although the means for fixing vinyl sheets has become quick and reliable, the above fixing means cannot be used in arch-shaped vinyl greenhouses, and so In this situation, the vinyl sheet is fixed by simply running a vinyl string between the pieces of wood.

Further, a dovetail frame and pipe coupling tool proposed in Japanese Utility Model Application Publication No. 53-88010 discloses a technique for coupling a pipe orthogonally to the dovetail frame.

Furthermore, a fixing device proposed in Japanese Utility Model Application Publication No. 52-108809 discloses a device for fixing a tube body perpendicularly to a lip-hat-shaped rod.

[Problem that the invention attempts to solve]

However, using vinyl strings to secure the vinyl sheets in arch-shaped greenhouses requires separate means for fixing the vinyl strings, such as stakes, which poses the problem of slow house construction and poor workability. Ta.

In addition, when connecting and fixing an arch-shaped dovetail-shaped support frame to an arch-shaped structural material used in an arch-shaped greenhouse, the above two publications state that If a connecting metal fitting with parallel upper and lower edges is used, the connecting metal fitting itself will tilt due to the curved structural material when driving the wedge, and the friction with the support frame will be extremely reduced, causing the connecting metal fitting to slide. However, it had the disadvantage that it was not possible to drive wedges into it.

The inventor of the present invention has completed the present invention as a result of various researches in view of the above circumstances.The purpose of the present invention is to have a simple structure and to drive a wedge when connecting two arch-shaped structural members. To provide a device capable of integrally connecting two arch-shaped structural members of a vinyl house, in which the connecting fittings do not tilt or slide and a wedge can be sufficiently driven.

[Means for solving problems]

In order to achieve the above object, the present invention has a cross section of U.
Both upper edges of the letter-shaped connecting fittings are curved inwardly to form locking pieces, and the locking pieces are locked to both dovetailed end edges of the arch-shaped support frame, and both sides of the bottom surface of the connecting metal fittings are fixed. In a device for integrally connecting and fixing an arch-shaped support frame for pasting a similar vinyl sheet to an arch-shaped structural member of a vinyl house by inserting tapered side edges of a U-shaped wedge in cross section, said connecting The bottom surface of the metal fitting is formed into a pair of inclined surfaces with the longitudinal center projecting upward, and the bottom surface of the connecting metal fitting is formed into a curved surface with the longitudinal center projecting upward. It is something that exists.

[Effect]

Next, to explain the operation of the structural member connecting device for a vinyl greenhouse of the present invention, first, a dovetail support frame curved in an arch shape like the structural member is attached to the outside of the arch-shaped structural member of the vinyl house. Next, a pair of wide latching pieces formed on the upper part of the connecting fitting having a U-shaped cross section are latched to both ends of the curved dovetail groove on the upper part of the support frame.

Next, in this state, tapered side edges having a U-shaped cross section are inserted into the gap between the bottom surface of the connecting fitting and the arch-shaped structural member along the bottom surface of the connecting fitting.

At this time, since the bottom surface of this connecting fitting has a pair of inclined surfaces formed almost the same as the taper of the wedge body so that the center in the longitudinal direction protrudes upward, the wedge body extends up to about 1/3 of the wedge body. The tip of the wedge moves along the arch-shaped structural member, and during this time the side edge of the wedge body is in a position parallel to the inclined bottom surface, so that the side edge of the wedge body is inserted into the bottom surface without resistance. Therefore, no rotational moment is generated in the connecting fitting at the initial stage of insertion of the wedge, so that the connecting fitting does not tilt.

Next, approximately 1/3 of the cuneiform body is inserted as described above,
With the side edge of the wedge in contact with the protrusion on the bottom, when the hammer striking surface formed on the end surface of the wedge is driven in with a hammer, the wedge will strike the longitudinal center portion formed on the bottom of the connecting fitting. The support frame is inserted while pushing and expanding the protrusion of the support frame, and the reaction force is applied to the entire wide hanging piece, and the connecting metal fittings act as elastic tension members to tighten the support frame to the arch-shaped structural member and connect and fix it.

Therefore, no rotational moment is generated in the connecting fitting during the entire driving period of the wedge, so that the connecting fitting does not tilt or slide at all.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Figures 1 and 2 show an arch-shaped structural member 1 of an arch-shaped greenhouse with a dovetail-shaped support frame 2 for pasting vinyl sheets attached to the outside, and a large curved structure at the top of these two members. Fig. 1 shows the inserted state of the wedge body 8 when the parts are connected together by the connecting fitting 3 and the wedge body 8. The figures each show a state in which the wedge body 8 has been completely driven.

3 and 4 similarly show the case where the structural member 1 and the dovetail support frame 2 are connected at the slightly curved side part of the arch-shaped structural member 1, and FIG. 3 shows a wedge-shaped structural member 1. FIG. 4 shows a state in which the wedge body 8 is initially inserted, and FIG. 4 shows a state in which the wedge body 8 is completely driven.

In the connecting fitting 3 of this embodiment, a pair of upper edges face each other and are bent inward to form a wide latching piece 4.

The bottom of the connecting fitting 3 protrudes upward at the center in the longitudinal direction, and has a bottom surface 5 that slopes toward both ends, and the slope of the bottom surface 5 is formed to be approximately the same as the taper of the wedge body 8. . Both sides 6, 6 are connected by this bottom surface 5, and wedge guide grooves 7, 7 are provided in parallel on both sides of the bottom surface 5. Further, a reinforcing rib 12 is formed at the center of the bottom surface 5.

On the other hand, the wedge body 8 has a U-shaped cross section, the lower edges of both side edges 9, 9 are tapered, and a hammer striking surface 10 is formed at one end of the wedge body 8. .

Note that the structural member 1 is a rod or a tube with a circular cross section.

Next, to explain the case where the dovetail support frame 2 is integrally connected to the arch-shaped structural member 1 using the above-mentioned connecting fittings 3 and the wedge body 8, first, this is attached to the outside of the arch-shaped structural member 1 of the greenhouse. Similar to the structural member 1, a dovetail-shaped support frame 2 is attached, and then a pair of wide hanging pieces 4, 4 formed on the upper part of the connecting fitting 3 are attached to both ends of the curved dovetail groove on the upper part of the support frame 2. It is hooked and locked onto the edges 2a, 2a.

Next, in this state, insert the wedge body 8 into the gap between the bottom surface 5 of the connecting fitting 3 and the circular structural member 1, and
The lower end edges of both side edges 9, 9 of the wedge body 8 are inserted into the inclined wedge guide grooves 7, 7 provided on both sides of the bottom surface 5 of the wedge body 8, while sliding them.

At this time, since the center of the bottom surface 5 of the connecting fitting 3 is formed to protrude upward, the wedge guide grooves 7, 7
The center part of the holder protrudes upward from both end parts, and is almost parallel to the taper of the lower end edge of both side edge parts 9, 9.
The wedge body 3 slides and is inserted while making line contact with the wedge guide grooves 7, 7.

Therefore, the wedge body 3 shown in FIG. 1 or 2
At the initial stage of insertion up to about one-third of the time, no rotational moment is generated in the connecting fitting 3, and the wide locking piece 4 is stably locked to the dovetail groove both end edges 2a, 2a.

Next, the hammer striking surface 10 formed on one end surface of the wedge is driven with a hammer or the like, and when the wedge 8 is further inserted, it advances while pushing and expanding the central protrusion 5a of the bottom surface 5 of the connecting fitting 3. As shown in Fig. 4, the upper surface 11 of the wedge body 8 presses the structural member 1, and the arch-shaped structural member 1 and the dovetail support frame 2 are firmly tightened by the elastic tensioning action of the steel connecting fittings 3. However, at this time, no rotational moment is generated in the connecting fitting 3 even by driving with a hammer or the like, and a downward force is applied to the connecting fitting 3, so that the connecting fitting 3 does not tilt or slide. There is no.

Next, FIG. 8 shows another embodiment of the present invention, in which the bottom surface 15 of the connecting fitting 3 has a curved surface with the center portion projecting upward in the longitudinal direction. The other structures of this embodiment are formed similarly to the first embodiment,
The driving action of the wedge body 8 is almost the same.

As explained above, when connecting the curved parts of two arch materials in the embodiment of the present invention,
During the entire driving period of the wedge body 3, the connecting metal fitting 3
Since no rotational moment is generated in the
There is no slippage, and the connecting fittings of the dovetail support frame to the structural member 1 are extremely easy, and workability is further improved.

[Effect of idea]

According to the above-described present invention, the latching pieces of the connecting metal fittings each having both upper edges curved inwardly to form the latching pieces are latched to both dovetailed end edges of the support frame, and The bottom part has an inclined bottom surface with the center protruding upward, and the tapered side edges having a U-shaped cross section are inserted into the bottom surface.
When connecting a similar arch-shaped dovetail support frame for vinyl sheeting to the arch-shaped structure of a greenhouse, the slanted bottom surface of the connecting fittings causes both edges of the wedge to touch the protrusion of the bottom surface. No rotational moment is generated in the connecting fitting at the initial stage of insertion until they come into contact, and even when the wedge is driven in thereafter, the wedge is inserted while pushing and expanding the protrusion in the longitudinal center formed on the bottom of the connecting fitting. As a result, only a downward force is applied to the connecting metal fittings, and no rotational moment is generated. Therefore, the connecting metal fittings do not tilt or move during the entire wedge driving process, making the connecting work easier. It is extremely easy to perform, and workability can be greatly improved.

In this way, even the curved parts of the two arch-shaped structural members can be securely tightened using the connecting fittings with the slanted bottom surfaces, and the arch-shaped dovetail support frame can be connected and fixed to the arch-shaped structural members as one body. can be done easily.

In addition, both upper edges of the connecting fittings are curved inward to form wide hanging pieces, so the arch-shaped structural members and the arch-shaped dovetail support frame are tightened even more firmly. This made it possible to withstand many years of use as a vinyl greenhouse.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partial cross-sectional front view showing an initial state in which a wedge is inserted into a large curved part of the upper part of an arch-shaped structural member, and FIG. 2 is a front view showing the wedge shown in FIG. FIGS. 3 and 4 are partially sectional front views showing a state in which body driving is completed; FIGS. 3 and 4 are partially sectional front views showing an initial state in which a wedge is inserted in a small curved portion of the side portion of an arch-shaped structural member and a state in which driving is completed; 5 is an exploded perspective view of FIG. 1, FIG. 6 is a front view, side view, and plan view of one embodiment of the connecting fitting, FIG. 7 is a front view, left and right side views of the wedge body, and FIG. The figure is a front view of a connecting fitting of another embodiment. DESCRIPTION OF SYMBOLS 1... Arch-shaped structural member, 2... Dovetail support frame, 3, 13... Connecting metal fittings, 4, 14... Latching piece, 5, 15... Bottom surface, 7... Wedge guide groove, 8
... Wedge body, 9 ... Tapered both side edges, 10 ... Hammer striking surface.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Both upper edges of a connecting fitting having a U-shaped cross section are curved inwardly to form a latching piece, and the latching piece is attached to a dovetail groove of an arch-shaped support frame. Locks on both end edges,
A similar arch-shaped support frame for pasting a vinyl sheet is integrally connected and fixed to the arch-shaped structural member of a vinyl house by fitting the tapered side edges of a U-shaped wedge in cross section to both sides of the bottom surface of the connecting fitting. An apparatus for integrally connecting and fixing an arch-shaped support frame to an arch-shaped structural member of a plastic greenhouse, characterized in that the bottom surface of the connecting fitting is formed into a pair of inclined surfaces with the longitudinal center thereof protruding upward. (2) An arch-shaped support frame is provided for the arch-shaped structural member of a greenhouse as described in claim 1 of the utility model registration claim, characterized in that the inclined bottom surface of the connecting fitting has an inclination that is almost the same as the taper of the wedge body. A device that is connected and fixed together. (3) An arch-shaped support frame for an arch-shaped structural member of a vinyl house according to claim 1 of the utility model registration claim, characterized in that the bottom surface of the connecting fitting is formed into a curved surface with the longitudinal center protruding upward. A device that connects and fixes the two together.