JP2603639Y2 - Protective fence - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a protective fence in which a fence pipe is bridged between adjacent columns of a plurality of columns, particularly when the protective fence is installed on a slope and when viewed from above. The present invention relates to a protective fence having a structure in which a crossing angle of a fence pipe with respect to a support column in a vertical or horizontal plane can be selectively changed so as to cope with any case where the fence pipe is installed in a bent non-linear state.

[0002]

2. Description of the Related Art Guard fences are not always installed on flat ground, and are not always installed in a straight line when viewed from above. If a protective fence is installed on a slope, the fence pipe must be inclined in a vertical plane with respect to the column. In addition, when the support is not installed in a straight line but is installed in a bent state when viewed from above, it is necessary to incline the fence pipe in the horizontal plane with respect to the support.

[0003] In such a case, it is also possible to prepare in advance the position and angle of mounting the fence pipe with respect to the support in accordance with the inclination of the protective fence installation surface and the arrangement of the support. However, this method has to prepare a plurality of types of columns and the like according to the installation conditions, and is complicated.

[0004] In order to solve these problems, a protective fence having a structure in which a mounting angle of a fence pipe with respect to a column is variable has been provided. However, these guard fences are such that only the horizontal or vertical angle of the fence pipe relative to the strut is variable. For this reason, it is necessary to use different types of protection fences when the protection fence is installed on a slope and when it is installed in a non-linear state that is bent when viewed from above.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to install the apparatus on a slope or in a non-linear state bent from above. An object of the present invention is to provide a protective fence having a structure in which a crossing angle of a fence pipe with respect to a support column in a vertical or horizontal plane can be selectively changed so as to cope with any case.

[0006]

In order to achieve the above object, a protective fence according to the present invention is provided with a plurality of columns erected at predetermined intervals and a tapered screw connection with each column. A first joint member, a second joint member surface-coupled to the first joint member via a pivot pin, and at least a second joint member coupled to the second joint member and bridged between adjacent columns. It is characterized by having one fence pipe.

[0007]

In the protective fence of the present invention, the first joint member and the second joint member are surface-connected via a pivot pin, so that the second joint member is pivotally connected to the first joint member. It is rotatable with respect to. As a result, the fence pipe whose both ends are connected to the second joint member is also rotatable with respect to each first joint member.

Further, since the first joint member is connected to the support by a taper screw, as is apparent from the characteristics of the taper screw in which the thread is tapered along the screw direction (for example, " Illustrated Dictionary of Machine Terms ”p3
82 (see "Nippon Kogyo Shimbun", Feb. 15, 1991), and can be rotated clockwise or counterclockwise while being connected to the column. As a result, by rotating the first joint member screwed to the column, the rotatable direction of the second joint member can be freely set to the crossing angle in the vertical plane or the horizontal plane.

When the protective fence of the present invention is installed on a slope,
When the first joint member is rotated and the second joint member is fixed in a direction that allows rotation in a vertical plane, the fence pipe is
The crossing angle in the vertical plane can be freely set via the second joint member.

When the protective fence of the present invention is installed in a non-linear state bent from above, the first joint member is rotated so that the second joint member can rotate in a horizontal plane. The fence pipe can freely set the crossing angle in the horizontal plane via the second joint member.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a protective fence according to the present invention; FIG.

In the present embodiment, a protective fence is provided in which two fence pipes 2 are bridged between columns 1 standing at predetermined intervals (see FIG. 3). 2 and 3 show an example in which four columns 1 are erected.

In FIG. 1, reference numeral 1 denotes one of the columns, and the column 1 is provided with a tapered female thread 5A. An external thread 3a of the first joint member 3 is taperedly coupled to the female thread 5A.

Except for the struts at both ends, each strut 1 is provided with two sets of diametrically opposed, two tapered female threads 5A at a constant interval in the axial direction, for a total of four locations. As the strut 1 installed at both ends of the entire protective fence, a strut having two tapered screw portions 5A provided on one side in the diametric direction at a constant interval in the axial direction is used (see FIG. 3).

The first joint member 3 comprises a male thread 3
On the side opposite to a, there is a tongue-shaped joint end 6, which has an axial plane 9. At a substantially central portion of the flat portion 9, a through hole 11 orthogonal to the axis is provided.

On the other hand, the second joint member 4 is provided with a cylindrical portion 7 for receiving the end of the fence pipe 2, and has a flat portion 10 parallel to the axis of the cylindrical portion 7 on the opposite side of the cylindrical portion 7. A joining end 8 is provided. A through hole 12 perpendicular to the plane portion 10 is provided substantially at the center of the joining end 8.

The first joint member 3 and the second joint member 4 are joined together by joining bolts 13 and nuts 14 through the through holes 11 and 12 by joining the flat portions 9 and 10 of the joint ends 7 and 8 respectively. I have. Also,
The joining ends 7 and 8 are formed in a substantially semicircular shape with the leading ends centered on the through holes 11 and 12, respectively. As a result, the first joint member 3 and the second joint member 4 form a pin joint using the bolt 13 as a pivot pin, and the second joint member 4 rotates at an angle of 90 degrees each on the left and right with respect to the first joint member 3. It is free to move.

At the approximate center of the side surface of the cylindrical portion 7 of the second joint member 4, one screw hole 15 penetrating through the cylindrical portion 7 in the radial direction is provided. On the other hand, at one end of the fence pipe 2 inserted into the cylindrical portion 7, one elongated opening 16 extending in the longitudinal direction is provided. A set screw 17 having a conical tip is screwed into the screw hole 15 of the cylindrical portion 7. Set screw 1
7 penetrates the elongated opening 16 of the fence pipe 2 from the screw hole 15 of the cylindrical portion 7. When the set screw 17 is completely tightened, the tip of the set screw 17 is pressed against the inner surface of the fence pipe 2 opposite to the elongated opening 16, and the fence pipe 2
The end is fixed in the cylindrical portion 7.

Next, the operation of the present embodiment having the above configuration will be described.

In the protective fence of this embodiment, since the second joint member 4 and the first joint member 3 are pin-connected by bolts 13, the fence pipe 2 can be freely angled with respect to the first joint member 3. Bendable.

Further, since the first joint member 3 is connected to the column 1 by a tapered screw, the first joint member 3 can be rotated 90 degrees counterclockwise or clockwise while being connected to the column 1. As a result, the first joint member 3 screw-coupled to the column 1 can be rotated, and the second joint member 4 can be rotated either in a vertical plane or a horizontal plane.

As shown in FIG. 2, when the protective fence of this embodiment is installed on a slope, the first joint member 3 is slightly rotated in either direction so that the second joint member 4 is moved in a vertical plane. Fix in a rotatable direction. Then fence pipe 2
Can be tilted in a vertical plane, and the crossing angle with respect to the column 1 can be freely set.

As shown in FIG. 3, when the protective fence of the present embodiment is installed in a non-linear state bent from above, the first joint member 3 is slightly rotated in either direction and the second joint The member 4 is fixed so that it can rotate in a horizontal plane. Then, the fence pipe 2 can be tilted in a horizontal plane, and the crossing angle with respect to the column 1 can be set freely. As a result, each fence pipe 2 can be installed in a non-linear state at various crossing angles with respect to each of the columns 1.

When the set screw 17 screwed into the screw hole 15 of the cylindrical portion 7 of the second joint member 4 is loosened, the end of the fence pipe 2 can slide in the cylindrical portion 7 in the axial direction. . As a result, the length of the portion of the fence pipe 2 exposed from the cylindrical portion 7 can be changed, and even when the fence pipe 2 is slanted and bridged as described above, the distance between the columns 1 can be kept constant, Errors such as the spacing between the columns 1 can be absorbed. After adjusting the length of the portion of the fence pipe 2 exposed from the cylindrical portion 7, if the set screw 17 is tightened, the fence pipe 2 is fixed to the second joint member 4.

Further, since the set screw 17 penetrates the elongated opening 16 of the fence pipe 2, the fence pipe 2 can slide only to a position where the set screw 17 hits both ends of the elongated opening 16. . As a result, the fence pipe 2 does not fall off the cylindrical portion 7 even if the set screw 17 is loosened. Further, even if the fence pipe 2 is slid and exposed to the maximum from the cylindrical portion 7, the insertion amount of the end of the fence pipe 2 into the cylindrical portion 7 is secured by a necessary amount in terms of strength.

[0026]

[Effects of the Invention] As described above, according to the present invention, it is possible to selectively cope with both the case where the device is installed on a slope and the case where the device is installed in a non-linear state bent from above. Since the protective fence has a structure that can be used, there is no need to change the parts of the protective fence depending on the installation conditions, and it is very efficient. In addition, since the selection between the case of installation on an inclined ground and the case of installation in a non-linear state bent from above can be performed only by turning the taper screw, the operation of such selection can be easily performed, and The structure can be made simple and strong.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing the structure of a main part of an embodiment of the present invention.

FIG. 2 is an elevation view showing a state in which a protective fence according to the present invention is installed on a slope.

FIG. 3 is a plan view showing a state in which the protective fence according to the present invention is installed in a bent non-linear shape.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Prop 2 Fence pipe 3 First joint member 4 Second joint member 5A, 3a Tapered thread

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of columns which are erected at predetermined intervals, a first joint member which is connected to each of the columns by a tapered screw, and a pivot pin for the first joint member. A protective fence comprising: a second joint member that is surface-connected to the second joint member; and at least one fence pipe that is connected to the second joint member and spans between adjacent columns.