JPH052656Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to protective fences installed on bridges, roads, etc.

(Prior Art) Conventionally, a protective fence has been constructed using pillars 1' as shown in Fig. 8, for example.
A tubular horizontal rail 3' is brought into contact with the rail mounting surface 2', and both are fixed via a mounting bracket 4'.
In the case of FIG. 8, the mounting bracket 4' has a locking rod 6' rotatably attached to the tip of the screw shaft 5' by a pin 7' as shown in B. 6'
into the horizontal rail 3' through the mounting hole 8' on the rail mounting surface 2' of the support column 1' and the mounting hole 9' on one side of the horizontal rail 3' along the length direction of the screw shaft portion 5'. The locking rod 6' is rotated and locked to the inner surface of the horizontal rail 3', and a nut 10' is tightened to the tip of the screw shaft 5' that protrudes outward from the rail mounting surface 2'. .

In addition, in the case of Fig. 9, the mounting bracket 4' is as shown in B.
The cylindrical body 12' is fitted onto the bolt 11', and the bolt 1
1' A threaded part is provided inside the cylindrical body 12' on the tip side to be screwed with the bolt 11', and a plurality of notches 13' are made approximately in the center of the cylindrical body 12'. A bolt 11' is inserted into the rail 3' through the mounting hole 8' on the rail mounting surface 2' of 1' and the mounting hole 9' on one side of the horizontal rail 3', and by tightening the bolt 11', the rail 3' inner cylindrical body 12'
is pulled toward the head side of the bolt 11' and caulked.

(Problem to be solved by the invention) However, the conventional former protective fence is
A mounting bracket is used in which a locking rod is rotatably attached to the base end of the screw shaft using a pin, and the locking rod is rotated within the horizontal rail and locked to the inner surface of the horizontal rail. , When installing, the locking rod does not rotate smoothly within the horizontal rail, or cannot be securely and stably locked to the inner surface of the horizontal rail, making installation time-consuming and making it difficult to obtain a stable mounting structure. There is. In addition, the locking rod is pivotally attached to the screw shaft by a pin, and this locking rod is locked to the inner surface of the horizontal rail, and a nut is tightened to the tip of the screw shaft, so that the locking rod and screw shaft are There is a problem in that the pin, which is the attachment part, is subject to a load, and the pin is likely to break or break, making it weak in terms of strength.

In addition, the latter type of protective fence has pillars and horizontal rails attached to it rather than the cylindrical body being caulked.
Once tightened, the fixation between the support and the horizontal rail cannot be released even if the bolts are loosened, making it difficult to repair, replace, or remove the support due to damage.

The present invention aims to provide a protective fence that solves these conventional problems.

(Means for Solving the Problems) In the protective fence of the present invention, one side of the tubular horizontal rail is in contact with the horizontal rail mounting surface of the support, and the horizontal rail mounting surface of the support has a non-circular mounting hole. , mounting holes smaller in diameter than the mounting holes are formed on one side of the horizontal rail, facing each other, and tightening bolts are inserted into the mounting holes, and the tightening bolts have bolt bodies that are cylindrical and A non-circular pedestal is provided on one end of the cylindrical body on the head side of the bolt body to engage and fit into the mounting hole of the column, and a non-circular pedestal is provided on the outer surface of the other end of the cylindrical body. A tapered portion having a stop is formed;
The sleeve has a cut groove formed along its length from one end that comes into contact with the cylindrical body, and a threaded part that screws into the bolt body is formed on the inner surface of the other end, and when the bolt body is tightened, the sleeve becomes cylindrical. It is characterized in that the sleeve is expanded by being drawn toward the shaped body, and the end of the sleeve comes into contact with the inner wall of the horizontal rail, thereby fixing the horizontal rail to the column.

(Example) The present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 indicates a support for a protective fence, which is made of metal. The support column 1 generally has an H-shaped cross section, and the surface facing the road is the rail attachment surface 2. This rail mounting surface 2 has mounting holes 3
is drilled. The mounting hole 3 has a non-circular shape corresponding to a pedestal so that a pedestal 10 of a cylindrical body 8, which will be described later, is fitted therein and cannot be rotated. Note that the support column 1 does not necessarily have to have an H-shaped cross section.

As shown in FIG. 6, the horizontal rail 4 is installed between the supports 1 and 1 to form a protective fence, and is made of metal and has a tubular shape. The horizontal rail 4 is formed into a tubular shape having an appropriate shape such as a circular, square, or oval cross section, and has a mounting hole 5 bored in one side thereof. This mounting hole 5 is provided opposite to the mounting hole 3 of the strut 1, through which a cylindrical body 8 and sleeve 9 described later can be freely inserted, and the diameter is smaller than that of the mounting hole 3 of the strut 1 described above. There is.

Numeral 6 is a tightening bolt for attaching the support column 1 and the horizontal rail 4. Tightening bolt 6
As shown in FIGS. 1 and 2, a bolt body 7 is inserted through a cylindrical body 8 and a sleeve 9.

The cylindrical body 8 is provided with a non-circular pedestal 10 at one end on the head side of the bolt body, and the pedestal 10 is engaged with the non-circular mounting hole 3 of the support column 1 and fitted in such a manner that it cannot rotate. Although the pedestal 10 is formed in the shape of an elliptical plate in FIG. 3, it may be a square plate as shown in FIG. 7, or any non-circular shape that can be fitted into the mounting hole 3 in a non-rotatable manner. On the outer surface of the other end of the cylindrical body 8, protruding detents 11 are formed at four locations, and between the detents 11 and 11, a tapered portion 12 is formed that tapers toward the end of the cylindrical body 8. ing.

It is sufficient that the detent 11 is provided at one or more locations, and as shown in FIG. It may be something that has been done.

The sleeve 9 is provided with a cut groove 14 at one end thereof which comes into contact with the cylindrical body 8 . The cut grooves 14 are provided at four locations, the same number as the rotation stops 11 of the cylindrical body, and are provided so as to cut out more than half of the sleeve 9 in the length direction from the end of the sleeve 9. The side wall of the cut groove 14 serves as the rotation stopper 11 of the cylindrical body 8.
It is designed to be locked in place. Also, cut groove 1
On the inner side of the end of the sleeve 9 on the 4th side, there is a tapered part 15 facing outward facing the tapered part 12 of the cylindrical body 8.
Although it is preferable that this be provided, there is no problem even if it is not provided. Further, a threaded portion 16 that is threadedly engaged with the bolt body 7 is formed on the inner surface of the other end of the sleeve 9, that is, on the inner surface of the end portion of the sleeve 9 corresponding to the distal end side of the bolt body 7.

Therefore, in order to attach the column 1 and the horizontal rail 4, the horizontal rail 4 is brought into contact with the rail mounting surface 2 of the column 1 as shown in FIG. Match. Next, a washer 17 is sequentially applied to the bolt body 7 as shown in FIG.
A tightening bolt 6 in which a cylindrical body 8 and a sleeve 9 are inserted, and the sleeve 9 is screwed together with the bolt body 7.
is inserted into the horizontal rail 4 through the mounting holes 3 and 5 as shown in FIG. The pedestal 10 of the inserted tightening bolt 6 is fitted into the mounting hole 3 of the column 1, and the washer 17 is brought into contact with the outer surface of the column 1. continue,
By tightening the bolt body 7, the sleeve 9 is drawn toward the cylindrical body 8 along the bolt body 7, and the sleeve 9 is expanded by the cut groove 14 at one end, and one end of the sleeve 9 is attached to the side rail 4. The horizontal rail 4 is fixed to the support column 1 by moving it until it comes into contact with the inner wall. At this time, one side of the cut groove 14 of the sleeve 9 hits the detent 11 provided on the cylindrical body 8 that is unrotatably fitted into the support column 1, and the cylindrical body 8
Since the sleeve 9 is made unrotatable, the bolt body 7 can be tightened without rotating idly.

(Effects of the invention) As detailed above, the protective fence of the present invention has non-circular mounting holes on the horizontal rail mounting surface of the support, and mounting holes with a smaller diameter than the aforementioned mounting holes on one side of the horizontal rail. It is easy to manufacture, and even after the pillars and horizontal rails have been manufactured, by separately drilling the mounting holes, it is possible to change or add the mounting positions of the pillars and horizontal rails. It's easy to do.

In addition, the cylindrical body that supports the column and horizontal rail is formed separately from the column and horizontal rail, so even if the cylindrical body is damaged, it can be easily removed and repaired by replacing it. Instead, a non-circular pedestal is provided protruding from the cylindrical body, and the pedestal of the cylindrical body engages and fits into the non-circular mounting hole of the support, so that the cylindrical body and the sleeve cannot rotate. This allows the bolt body to be tightened without entraining the cylindrical body or sleeve, which allows for reliable tightening and excellent workability.

Furthermore, unlike conventional methods, the bolt tips do not protrude from the surface after installation, or once tightened, the bolts cannot be removed even if the bolts are loosened.
It looks good, poses no safety problems, and is easy to maintain. Furthermore, the pull-out strength is not affected by the strength of the pin as in the past, and the sleeve has the effect of exceeding the strength originally possessed by the bolt.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway sectional view showing one embodiment of the protective fence of the present invention, Fig. 2 is a sectional view showing the installed state, and Fig. 3 is a sectional view showing an embodiment of the protective fence of the present invention.
The figure is an exploded perspective view showing an example of a tightening bolt.
Fig. 5 is a partially cutaway vertical cross-sectional view showing another embodiment of the protective fence of the present invention, Fig. 6 is a perspective view showing an example of installation of the protective fence of the present invention, and Fig. 7 is a tightening in the present invention. Other examples of the cylindrical bodies of bolts are shown in which A is a side view, B is a front view, A in FIGS. FIG. 3 is a perspective view showing the mounting fittings in use. 1... Support column, 2... Rail mounting surface, 3, 5...
Mounting hole, 4...Horizontal rail, 6...Tightening bolt,
7... Bolt body, 8... Cylindrical body, 9... Sleeve, 10... Pedestal, 11... Stop rotation, 12, 1
3, 15... Taper part, 14... Cut groove, 16
...Screw part, 17...Watushia.

Claims (1)

[Scope of utility model registration request] A tubular horizontal rail 4 is attached to the horizontal rail mounting surface 2 of the column 1.
A non-circular mounting hole 3 is formed on the horizontal rail mounting surface 2 of the support column 1, and a mounting hole 5 having a smaller diameter than the mounting hole 3 is formed on one side of the horizontal rail 4. A tightening bolt 6 is inserted into the mounting holes 3 and 5, and the bolt body 7 of the tightening bolt 6 is inserted through the cylindrical body 8 and the sleeve 9,
A column 1 is attached to one end of the bolt body 7 on the head side of the cylindrical body 8.
A non-circular pedestal 10 that is engaged and fitted into the mounting hole 3 of the cylindrical body 8 is provided protrudingly, a tapered portion 12 having a detent 11 is formed on the outer surface of the other end of the cylindrical body 8, and the sleeve 9 is attached to the cylindrical body 8. A cut groove 14 is formed along the length from one end that comes into contact with the other end, and a threaded portion 16 that screws into the bolt body 7 is formed on the inner surface of the other end. Shape 8
A protective fence in which a horizontal rail 4 is fixed to a column 1 by being drawn to the side and expanding the sleeve 9, and the end of the sleeve 9 comes into contact with the inner wall of the horizontal rail 4.