JPH032116Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a long square rafter that is used for a large number of rafters arranged side by side in a vinyl greenhouse, and a vinyl sheet is fixed with corrugated wire rods. The present invention relates to an improvement in a fastening device for rafters of a vinyl house, which allows pipe bodies having a circular cross section to be easily fastened sequentially as passing members.

[Conventional technology]

In recent years, the present applicant has proposed Utility Model Application Publication No. 109788/1988 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 faster and more reliable, when connecting thread members with a circular cross section to a large number of rafters, the contact area is small and it is almost impossible to make a line contact. Since the condition is similar, there are many inconveniences in screwing or spot welding.

For this reason, various coupling fittings have been proposed, but all of them have poor workability and have problems in durability when used for a long time.

For example, as a metal fitting of this type,
What is described in the publication consists of a latching fitting that is latched to the curved edge of the dovetail frame, and a wedge that is driven into the latching fitting at a position behind the pipe that has passed through the latching fitting. The latching metal fittings include four hook parts that are curved so as to be latched onto the curved edges of the dovetail frame, and a notch shape that is deeply cut down from the hook parts with a width equivalent to the outside diameter of the pipe. and a wedge guide groove curved in the same direction as the hook part at a position below the lower edge of the pipe passage part, and the wedge is fitted into the wedge guide groove of the latching fitting. The mating U-shaped cross sections have the required slope in the direction of the wedge guide groove.

[Problem that the invention attempts to solve]

However, in the method described in the above-mentioned Japanese Utility Model Publication No. 53-88010, when the threading members are sequentially fastened to a large number of rafters, the threading members are brought close to the frame having the dovetail groove by the metal fittings that have already been fastened. Because there is no opening for the pipe passage below the latch fitting, the fastening work is extremely difficult.
The pipe must be passed through the pipe passage part of the fitting each time and then fixed to the groove frame, which has the disadvantage of very poor workability, and especially when the pipe body is temporarily fastened, the work time is reduced. There is a problem with needing a large cloth.

Further, since the hook portion is divided into four parts, it is unstable when driving a wedge, and the locking in the dovetail groove is easily disengaged, resulting in very poor workability.

Furthermore, since the wedge has a U-shaped cross section, it is difficult to drive it in, and if it is driven too hard, stress will immediately concentrate in the center of the pipe passage of the latch, causing it to break, and cracks will also form in that area during use. There were problems with durability, such as storage.

The present invention was devised in view of the above circumstances, and has a simple structure that allows for extremely easy installation and fastening from above when sequentially fastening members through a large number of square rafters installed in parallel. To provide a fastening device for rafters of a vinyl house that has particularly good workability in attaching a passing member to the installed rafters, is strong and can withstand long-term use.

[Means for solving problems]

In order to achieve the above-mentioned purpose, the present invention involves hooking pieces formed across the entire width of the upper part of a pair of latch fittings to both end edges of the upper dovetail groove of a square rafter in which a dovetail groove is formed in the upper part of a greenhouse. , the tapered side edges of a U-shaped wedge with a hammer striking surface on one end surface are fitted into wedge guide grooves formed by bending each lower end of the latching metal inward to form a wedge guide groove with a circular cross section on the rafter. In a fastening device for rafters of a vinyl house for fastening pipe bodies, a horseshoe-shaped notch is formed from below in the center of each of the pair of latching fittings for inserting the pipe body from below, and the notch The center of the upper part is folded back to form a reinforcing rib.

[Function] Next, to explain the function of the present invention, a pipe body with a circular cross section, which is a passing member, is fastened to a large number of rafters installed in parallel in a greenhouse, that is, long square rafters with dovetail grooves formed on the upper part. At this time, a pair of latching metal fittings each having a latching piece on the upper part are attached from above to both end edges of the dovetail groove formed in the square rafter so that the wide latching pieces are latched so as to face each other. Then, insert the pipe body of the pass-through member through the lower opening of the horseshoe-shaped notch formed at the lower center of the latch, and insert the U-shaped wedge in cross section into the wedge guide groove formed at the lower end of the latch. The tapered edges of both sides are inserted, and the hammer striking surface provided on one end surface of the wedge is sufficiently driven with a hammer, and the upper surface of the wedge presses the pipe body against the lower surface of the square rafter and fixes it.

Next, when fastening to the next rafter or when the pipe body of the passing member is temporarily fastened, a pair of latching metal fittings are attached to both ends of each dovetail groove from above the square rafters arranged side by side. When it is locked, the pipe body automatically enters the horseshoe-shaped notch of the latch fitting, making the fastening operation easy.

〔Example〕

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

FIG. 1 is a perspective view of a fastening device for rafters of a greenhouse according to the present embodiment, and FIG. 2 is an exploded explanatory view thereof.

The latching metal fittings to be latched to both curved end edges 3, 3 of the dovetail groove 2 formed on the upper part of the square rafter 1 of the greenhouse are formed by bending the upper part inward to form the latching piece 4, A horseshoe-shaped notch 5 is provided at the lower center, and the pair of steel latching metal fittings 6, 6 are opposed to each other and are latched from above by the latching pieces 4, 4.

A reinforcing rib 7 is formed by folding back the central part of the horseshoe-shaped notch 5 of the latch 6, and the two lower ends of the latching metal 6 are bent in the same direction as the latching piece 4 to form a wedge. A guide groove 8 is provided.

On the other hand, a wedge body 9 having a U-shaped cross section that is engaged with the wedge guide groove 8 has tapered side edges 10, and a hammer striking surface 11 is provided on one end surface.

Next, to explain the operation of this embodiment, whether the pipe body 13 of the passing member is temporarily fastened or not, the pair of latching metal fittings 6, 6 are attached to the rafter 1 from above the rafter 1. It is secured to both side edges 3, 3 of the dovetail groove 2 by means of latching pieces 4, 4.

After the pipe body 13 is inserted into the horseshoe-shaped notches 5, 5 formed at the lower center of the latching fittings 6, 6, the wedge guide grooves 8, 8 at the lower end are inserted into the both side edges 10 of the wedge body 9. 10, and drive the hammer striking surface 11 of the wedge body 9 with a hammer.
The pipe body 13 is pressed against the lower surface of the rafter 1 by the upper surface 12, and the latching metal fittings 6 are held as tension members.

When driving this wedge body 9, please use the latch metal fitting 6.
The latching pieces 6, 6, which are latched to the dovetail grooves by the wide and long latching pieces 4, 4, do not shift.
Furthermore, since the reinforcing ribs 7, 7 are formed at the center of the notch 5, the two lower ends of the latching metal fitting 6 do not widen, so that the opposite edges 10, 1 of the wedge body 9 are prevented from widening.
0 slides smoothly on the wedge guide grooves 8, 8, and a sufficient wedge effect can be obtained.

In addition, it is more preferable to provide a convex strip on the upper surface 12 of the wedge body 9.

Therefore, according to this embodiment, the latching metal fittings 6, which can be easily mass-produced by press working of steel plates, etc.
The latching piece 4 of the latching fitting 6 is secured by the latching piece 6 and the wedge body 9
By simply hooking the dovetail grooves 2 on both sides 3, 3 of the dovetail groove 2 and driving the wedge body 9 into the lower end, the rafter and the pipe body 13 of the through member can be firmly connected using the wedge effect.

[Effects of the invention] According to the above-mentioned invention, especially when sequentially fastening passing members to a large number of square rafters arranged side by side, a wide hanging piece is provided at the upper part, and a horseshoe-shaped notch is provided at the lower center. When a pair of latching metal fittings formed with a section are engaged from above to both end edges of each dovetail groove of a large number of square rafters arranged side by side, the pipe body is automatically inserted into the notch, so that the lower end By driving the tapered side edges of the wedge into the formed wedge guide grooves, the pipe bodies of the through member can be very easily fastened to a large number of rafters arranged in parallel.

Furthermore, a reinforcing rib is formed in the center of the horseshoe-shaped notch provided at the lower center of the latch, so even if the wedge is hit a little hard when driving in, the horseshoe-shaped notch will not crack and remain continuous. It is suitable for work, and provides a strong and durable metal fitting even when used after tightening, and the wide latching piece provides stability when driving wedges, making it excellent in workability. .

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of the embodiment in a fastened state, FIG. 2 is an explanatory diagram showing an exploded state, and FIG. 3 is a partially sectional side view of FIG. 1. 4 are a front view and a side view of the latch fitting, and FIG. 5 is a side view and both end views of the wedge body. 1...Rafter (square rafter), 2...Dovetail groove, 3...
Edge portion, 4... Latching piece, 5... Notch portion, 6...
Latching metal fitting, 7... Reinforcement rib, 8... Wedge guide groove, 9... Wedge body, 10... Side edge, 11... Hammer striking surface, 13... Pipe body.

Claims (1)

[Scope of utility model registration request] A pair of latching pieces formed over the entire width of the upper part of the pair of latching metal fittings is latched to both end edges of the dovetail grooves of a square rafter of a plastic greenhouse with dovetail grooves formed on the upper part, and each lower end of the latching metal fittings is turned inward. For rafters of a vinyl house, in which a pipe body having a circular cross section is fastened to the rafter by inserting tapered side edges of a wedge shaped like a U-shaped cross section with a hammer striking surface on one end surface into a wedge guide groove formed by bending the pipe into a wedge guide groove. In the fastening device, a horseshoe-shaped notch for inserting the pipe body from below is formed in the center of each of the pair of latching fittings from below, and the upper center of the notch is folded back to form a reinforcing rib. A fastening device for the rafters of a vinyl greenhouse.