JPH0428356Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention involves inserting a square pillar, etc. into a U-shaped metal fitting, and fastening the square pillar, etc. between both side plates of the U-shaped metal fitting with bolts. This invention relates to a fastener for a U-shaped metal fitting for flooring materials.

[Conventional technology]

A U-shaped bracket 2 is fixed on a floor support 1 as shown in FIG.
The square column 3 and the like are fixed to the floor support 1 by means of lock bolts 5 on both side plates 4, 4 of the metal fitting 2, which is used for fastening floor sub-materials. In that case, the lock bolt 5 is provided with a protrusion 7 on the seat surface 6 of the head 5a, as shown in FIGS. 7a and 7b, and the side plates 4,
The bolt hole 8 of No. 4 is also provided with a notch 9 into which the protrusion 7 of the bolt 5 is fitted, as shown in FIG. 8, and serves to prevent the bolt 5 from rotating. In this way, tighten the both side plates 4 of the U-shaped fitting 2 with the bolts 5,
A square column 3 of the flooring material is firmly fixed inside the U-shaped metal fitting 2.

[Problem that the invention attempts to solve]

A bolt 5 is inserted in advance into a U-shaped metal fitting 2 into which a square column 3 is inserted and fastened by a locking bolt 5, and is temporarily fastened with a nut in order to facilitate the control of the number of U-shaped metal fittings 2 and locking bolts 5. Therefore, when assembling the flooring material, in order to fit the square column 3 etc. into the U-shaped fitting 2, remove the bolt 5 that is temporarily fastened by removing the nut 6, insert the square column 3 etc., and then once again. It is a hassle because you have to install the bolt 5 and tighten it by tightening the nut 6.
The problem was that it required a lot of man-hours. In the present invention, the temporarily fastened bolts 5 are removed from the U-shaped fitting 2 without removing the nuts 6, and after fitting the square pillar 3, etc., the bolts 5 are easily attached to the side plates 4 of the U-shaped fitting 2. This was done to ensure that the

[Means for solving problems]

In the present invention, the head of the locking bolt that fastens the upper ends of both side plates of the U-shaped fitting is formed into a flat shape along the plane that includes the bolt shaft, and the bolt is provided on the seat surface of the head near the bolt shaft. A protruding portion is formed that bulges toward the tip of the shaft, and the protruding portion is fitted into a first elongated hole through which the bolt head and the protruding portion pass through at least one of both side surfaces of the U-shaped fitting. A cross-shaped hole is formed in the shape of intersecting with a slightly shorter second elongated hole through which the head does not penetrate, and a U with the cross-shaped hole is formed.
The U-shaped metal fitting and the bolt are combined to form a fastener for a U-shaped metal fitting for flooring material.

[Effect]

In the U-shaped metal fitting, a protrusion that protrudes from the bolt head seat surface toward the tip of the bolt shaft fits into the second elongated hole of the cross-shaped hole in the side plate, and is inserted into the other side plate of the U-shaped metal fitting. The bolt shaft is inserted and temporarily secured with a nut. To fix a prism etc. to this, loosen the nut a little or bend the U-shaped bracket slightly inward.
Remove the protrusion of the bolt head fitted into the second elongated hole, and rotate until the flat surface of the seat of the bolt head coincides with the first elongated hole. The bolt head then passes through the first elongated hole and exits the cross-shaped hole. Therefore, after fitting a square column etc. into the U-shaped fitting, the bolt head is passed through the first elongated hole again and fitted into the cross-shaped hole, and the bolt head is rotated to the position of the second elongated hole. The protruding portion of the head seat is inserted into the second elongated hole. Then, tighten the nut to fix the square pillar etc. to the U-shaped fitting.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, lock bolts 12 are used to fasten the side plates 11 of the U-shaped metal fitting 10 for flooring materials.
The head 13 has a flat shape along a plane including the bolt axis. As shown in FIG. 2, the details of the lock bolt 12 are such that a protrusion 16 is formed near the shaft portion 15 on the seat surface 14 of the head 13 and bulges toward the tip of the bolt shaft. The outside is a flat surface 17. The thickness of the flat head 13 is approximately the same as the diameter of the shaft portion 15 in this embodiment, but it may be slightly thinner or thicker.

As shown in FIG. 3, the protrusion 16 and the first elongated hole 18 through which the flat head 13 and protrusion 16 of the lock bolt 12 pass are fitted into the side plates 11 of the U-shaped fitting 10. A slightly shorter second long hole 19 that does not penetrate the entire head 13 is bored as a cross-shaped hole 20 that intersects with the second long hole 19 to form a substantially cross shape. Note that the cross-shaped hole 20 is generally formed on both side plates 11.
Although the holes may be drilled in both of the side plates 11, they may be drilled only in one of the both side plates 11.

A lock bolt 12 is inserted into the U-shaped metal fitting 10 for flooring material in advance in order to control the number of pieces.
In this case, the protrusion 16 protruding from the seat surface 14 of the bolt head 13 is fitted into the second elongated hole 19 of the cross-shaped hole 20 bored in one of the side plates 11, and the protrusion 16 protruding from the seat surface 14 of the bolt head 13 is inserted into the second elongated hole 19 of the cross-shaped hole 20 bored in one side of the side plates 11. The shaft portion fits into a cross-shaped hole 20 bored in the other side plate 11. The other side plate 11 is temporarily fixed by tightening the screw 15a of the shaft portion 15 with a nut 21 from the outside.

In order to fit and fix the prism 3 etc. therein as shown in FIG. 4, loosen the nut 21 a little. In this case, since the prism 3 is not in the position shown in the figure, the side plates 11 of the U-shaped fitting 10 may be bent slightly inward. The protrusion 16 of the bolt head 13 that has been fitted into the second elongated hole 19 is removed from the second elongated hole 19, and the bolt head 13 is rotated approximately 90 degrees until it aligns with the first elongated hole 18. let Then the bolt head 13
passes through the first elongated hole 18 and exits from the cross-shaped hole 20. Similar cross-shaped holes 20 are made in the other side plates 11, so that the first and second elongated holes intersect with each other.
The bolt head 13 passes through the first elongated hole 19, and the lock bolt 12 is completely removed from the U-shaped fitting 10. At this time, the nut 21 is screwed onto the screw 15a and hardly moves. Then, convert the prism 3 to U
It can be fitted into the metal fitting 10. Further, as shown in FIG. 5, the cross-shaped hole 20 may be formed only on one side of the side plates 11, and the other side plate 11 may be formed with only a hole 22 through which the bolt shaft portion 15 is inserted. In this case, the bolt head 13 should be
Even if the bolt head is rotated 90 degrees and removed from the cross-shaped hole 20 of one side plate 11, the bolt head remains stuck in the bolt shaft insertion hole 22 of the other side plate, as shown in Fig. 5. . However, even in this state, generally U
The metal fitting 10 has a sufficiently large opening so that the square column 3 and the like can be inserted therein without the bolt head getting in the way. In addition, if there is a risk that the bolt head may come into contact with the prism 3 or the like at that time, the U-shaped fitting 10 may be slightly opened outward.

After the prism 3 and the like are fitted, the head 13 of the lock bolt 12 is inserted through the first elongated hole 18 of the cross-shaped hole 20. In this case, the cross-shaped hole 20 is
1 has the advantage that the lock bolt 12 can be inserted from either side. Cross-shaped hole 2 in the side plate to which the lock bolt head 13 is to be fastened
After passing through the first elongated hole 18 of 0, the bolt head 1
3 is wrapped around the second elongated hole 19 of the cross-shaped hole 20, and the shaft of the lock bolt 12 is rotated about 90 degrees.
When the nut 21 is tightened to the threaded portion 15a of the lock bolt 12 at that position, the protrusion 16 of the bolt head 13 will fit into the second elongated hole 19, and the flat surface 17 of the seat surface 14 will be attached to the outer wall of the side plate 11. come into contact with In this way, the lock bolts 12 tighten the side plates 11 of the U-shaped fitting 10, and the square column 3 and the like are fastened to the U-shaped fitting 10.

[Effect of idea]

Since the present invention has the above-mentioned structure and operation, when a square pole or the like is inserted into the recess of the U-shaped bracket for fastening the square pole to the U-shaped bracket for flooring material, the U
There is no need to remove the lock bolt temporarily fixed to the U-shaped metal fitting by pulling out the nut, and the lock bolt can be attached to and removed from the U-shaped metal fitting with a simple operation. This has the effect of shortening the construction time and reducing the number of man-hours when fastening the subflooring material with the U-shaped metal fittings. Furthermore, if the cross-shaped holes are provided protrudingly from both sides of the side plates instead of only from one side, the lock bolt can be inserted from either side of the U-shaped fitting, which has the effect of making the work that much easier.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the assembly of a lock bolt in an embodiment of the present invention when it is attached to a U-shaped metal fitting for flooring material, Fig. 2 is an enlarged perspective view of the lock bolt, and Fig. 3 shows the cross shape of the U-shaped metal fitting. A perspective view of the hole, FIG. 4 is a perspective view of the case where a square piece is inserted into the U-shaped fitting and fastened.
Fig. 5 is a perspective view of another embodiment in which the lock bolt is removed from the U-shaped metal fitting, Fig. 6 is a perspective view showing the installation of a square piece using a conventional U-shaped metal fitting for flooring materials, and Fig. 7 a, b. 8 is a side view and a plan view of a conventional lock bolt, and FIG. 8 is a plan view of a bolt hole of a U-shaped fitting. 10...U-shaped metal fitting, 11...U-shaped metal fitting side plates,
12... Lock bolt, 13... Bolt head, 1
4...Bolt head bearing surface, 15...Bolt shaft, 1
6... Bolt seat protrusion, 17... Bolt seat flat part, 18... First elongated hole, 19... Second elongated hole, 20... Cross-shaped hole.

Claims (1)

[Scope of utility model registration request] In a U-shaped metal fitting fastener, in which a pair of side plates are erected, a prismatic material is sandwiched between the two side plates, and the upper ends of the side plates are fastened with a lock bolt, the head of the lock bolt is connected to the bolt shaft. The head is formed into a flat shape along the surface thereof, and a protrusion protruding toward the tip of the bolt shaft is formed near the bolt shaft on the seat surface of the head, and a protrusion on both sides of the U-shaped metal fitting is formed. At least one side has a cross-shaped hole in which a first elongated hole through which the bolt head and the protrusion pass through, and a slightly shorter second elongate hole into which the protrusion fits and through which the head does not pass intersect. A fastener for a U-shaped metal fitting for flooring material, characterized by having a perforated hole.