JP2000352022A - Pit protection fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a worker or a passerby from falling in the inside by providing a hook on an insert cylinder of a fence member to be fitted to the upper end edge of a casing. SOLUTION: As a fence member 2, a metallic pipe is bent like a U-shape to form parallel insert legs 6, 6. A pair of support members 3 are provided for the fence member 2, each support member 3 is formed by welding a hook plate 10 on the outside surface of an insert cylinder 9 for receiving the insert leg 6, and a downward bent hook 11 is formed on the upper end of the hook plate 10. The hook 11 is locked on the upper end peripheral edge part of a casing 1, and fixed to the inner peripheral surface of the casing 1 at the interval of insert legs 6, 6 by a fixing bolt 14. After that, the insert legs 6, 6 of the fence member 2 are inserted in each pair of support members 3 and stopped by a fastening bolt 17. Thus, the whole periphery of the upper end of the casing 1 is surrounded with eight fence members 2 and the fastening bolt 17 is loosened to remove a required number of fence members 2, so that the safety of a worker or a passerby can be further improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence provided at an opening of a shaft excavated to a required depth from the ground surface when constructing various pipelines and structures underground.

[0002]

2. Description of the Related Art When a shaft as described above is provided on a road,
In order to close the opening of the shaft half by half, two lining plates are covered. In addition, to make it easier for workers to enter and exit, one half of the opening is closed with one lining plate, the other half is opened, and a protective fence is attached to the open side edge of the lining plate. Is performed. Further, for safety, a protective net may be attached to the open surface so as to be openable and closable (Japanese Patent Application No. 8-2, filed by the present applicant).
No. 85151).

[0003]

However, the conventional guard fence was inconvenient to handle because it was large and had a width substantially equal to the radius of the opening. Further, since no fence was provided in the arc portion of the opening, there was a danger that workers and passers-by would fall into the casing from places where there was no protective fence, which was insufficient as a safety measure.

[0004] Therefore, an object of the present invention is to provide a shaft protection fence which is convenient in handling and secures workers and passers-by.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a shaft protection fence attached to the upper end periphery of a casing inserted into the inner peripheral surface of a shaft, wherein a plurality of independent fences are provided. A member and a pair of support members for each of the fence members, each of the fence members has two parallel insertion legs at a lower end thereof at a fixed interval, and the support member is an insertion tube for receiving the insertion legs. And an integrated hook for detachably attaching the insertion tube to the casing.

The vertical shaft protection fence attached to the upper edge of the casing inserted into the inner peripheral surface of the shaft includes a plurality of independent fence members and a pair of support members for each fence member. Each of the fence members has two parallel insertion legs at a lower end thereof at regular intervals, and the support member is integrally attached to the insertion legs and has an integrated hook detachably attached to the casing. Can be taken.

Further, in a shaft protection fence used when half of an upper end opening surface of a casing inserted into an inner peripheral surface of a shaft is closed by a lining plate, the shaft is attached to a peripheral edge of an upper end of the casing for an opened half circle. A plurality of independent casing fence members, a pair of support members for each casing fence member, and a plurality of independent lining board fence members attached to the open side edge of the lining board. Each of the casing fence member and the lining plate fence member has two parallel insertion legs at a lower end thereof at regular intervals, and the support member receives the insertion leg of the casing shelf member. A tube and an integrated hook for detachably attaching the insertion tube to the casing, and receiving the insertion legs for each of the lining plate fence members on the open side edge of the lining plate; Structure fitted with a pair each of the insertion tube can take that.

[0008] In a shaft protection fence used when half of the upper end opening surface of the casing inserted into the inner peripheral surface of the shaft is closed by a lining plate, an independent half-opened outer peripheral portion attached to the upper end peripheral portion of the casing. A plurality of casing fence members, a pair of support members for each of these casing fence members, and a plurality of independent lining plate fence members attached to the open side edge of the lining plate, Each of the casing fence member and the lining plate fence member has two parallel insertion legs at a fixed lower end thereof, and the support member is integrally attached to the insertion leg of the casing shelf member. A pair of hooks that are detachably attached to the casing and that receive the insertion legs for each of the lining plate fence members on the open side edge of the lining plate. It can be the structure fitted with the insertion tube.

It is also possible to adopt a configuration in which a protective net for closing the open portion of the casing is attached to the side edge on the open side of the lining plate so as to be freely opened and closed.

[0010]

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

The first embodiment shown in FIGS. 1 to 3 is mounted on the upper edge of the casing 1 which is inserted into the inner surface of the shaft and is exposed to the ground surface. As shown in FIG. 1, it is constituted by a combination of eight barrier members 2 and a pair of support members 3 provided corresponding to each barrier member 2.

As shown in FIG. 3, the fence member 2 is formed by bending a metal pipe in a downward U-shape, and a flange 5, 5 is provided at the lower end of the vertical pipe 4, 4 having the same length. There are provided insertion legs 6, 6 which are provided and are parallel from each brim 5 to the lower end. Further, an auxiliary horizontal pipe 7 is provided between the vertical pipes 4, 4, and an auxiliary vertical pipe 8 is provided between the middle of the auxiliary horizontal pipe 7 and the middle of the upper end of the fence member 2.

Further, the above-mentioned support member 3 is provided in FIGS.
As shown in FIG. 1, a hook plate 10 is integrated with an outer surface of an insertion tube 9 for receiving the insertion leg 6 by welding. Hook 1 bent downward at the upper end of hook plate 10
1 is formed.

The lower end of the hook plate 10 is formed slightly longer below the insertion tube 9 and has a bolt hole 12 formed in the lower end thereof.
A nut 13 is fixed to the inner surface of the nut, and a fixing bolt 14 is screwed to the nut 13. A bolt hole 15 is also provided in the insertion tube 9, a nut 16 is fixed to the bolt hole 15, and a tightening bolt 17 is screwed to the nut 16.

A pair of the support members 3 are prepared for one shelf member 2. The hooks 11 are locked to the peripheral edge of the upper end of the casing 1, and are fixed to the inner peripheral surface of the casing 1 by fixing bolts 13. The shelf members 2 are fixed at intervals between the insertion legs 6. Thereafter, the insertion legs 6, 6 of one shelf member 2 are inserted into the insertion tube 9 for each pair of support members 3, and the insertion legs 6 are tightened with the tightening bolts 17, so that the removal is prevented.

Thus, the periphery of the upper end of the casing 1 is surrounded by the eight fence members 2. When the worker goes in and out and takes tools in and out, the tightening bolt 17 is loosened to remove one or a required number of the shelf members 2 and return to the original state after use.

Next, the second embodiment shown in FIGS. 4 to 6 has a lining plate 18 for closing half of the upper end opening surface of the casing 1, and a protective fence is provided around the other half of the opening surface. It is provided.

The lining plate 18 is formed on a lower surface of a rectangular steel plate (or a semicircular steel plate whose radius is slightly larger than that of the casing 1 although not shown) as shown in FIG. (See FIGS. 5 and 6), and the inner plate 21 of the fitting portion 19 is fixed along the inner edge of the lining plate 18. Inverted L-shaped angle members 22, 22 are attached to the inner edges of the inner plate 21 and the lining plate 18 at two places, and the lower ends of a pair of holes provided on the upper surface of the angle members 22, 22 are provided. The upper end of the insertion tube 9 'is fixed. The fixing bolt 23 is screwed into the fitting portion 15, and a tightening bolt 17 'is attached to the insertion tube 9'. Further, a suspension ring 24 is provided on the lining plate 18.

The first pair of insertion tubes 9 is provided with the first
The insertion leg 6 of the lining plate fence member 2b similar to the fence member 2 of the embodiment is inserted and tightened by the tightening bolt 17 '.
The retaining is achieved.

On the other hand, a protective fence comprising a combination of a casing fence member 2a similar to the fence member 2 of the first embodiment and a pair of support members 3 is provided on a half-circumferential portion on the open side of the casing 1 as shown in FIG. Are provided. Since these components are the same as those of the first embodiment described above, the same portions are denoted by the same reference numerals and description thereof will be omitted.

As shown by a dashed line in FIG. 4, a semicircular protection net 25 covering a half opening surface of the casing 1 may be attached to the inner edge of the lining plate 18 so as to be openable and closable.

The second embodiment is as described above.
By closing half of the opening surface of the casing 1 with the lining plate 18, the casing 1 can be used for traffic and the periphery of the other half of the opening surface is surrounded by the casing fence member 2a.
And the lining plate fence member 2b. Also, these fence members 2a, 2b can be removed as required for work.

As described above, the use of the protective net 25 is safer for both workers and passers-by.

In the first and second embodiments, the fence members 2, 2a attached to the casing 1
Is an insertion tube 9 of the support member 3 previously fixed to the casing 1.
The insertion legs 6 of the fence members 2 and 2a are inserted into the fence members 2a. However, the fence member 2 'of the third embodiment shown in FIGS. It is configured to be fixed in advance. In this case, the supporting member 3 'is a hook plate 10' slightly wider than the diameter of the insertion leg 6 of the fence member 2 '.
The hook 11 ′ is formed by bending the upper end portion downward, and the hook plate 10 ′ is fixed to the outer surface of the insertion leg 6 by welding.

As shown in FIG. 8 (b), the hook plate 10 'is provided with a bolt hole 12' outside the insertion leg 6, and a nut 13 'is provided on the inner surface of the bolt hole 12'. It is fixed. Then, the fixing bolt 1 is attached to the nut 13 '.
4 'is screwed.

Since the support member 3 'is fixed to the shelf member 2' of the third embodiment in advance as described above, the hook member 11 'of the support member 3' is used when attaching the support member 3 'to the casing 1.
May be fitted to the upper edge of the casing 1 and the fixing bolt 14 'may be tightened. At this time, the worker who tightens the fixing bolt 14 ′ can work by holding the fence member 2 ′, so that it is safe.

The fence member 2 'and the support member 3' of the third embodiment are attached to the casing 1 instead of the fence member 2 and the support member 3 of the first embodiment (FIGS. 1 to 3). Of course, it can be attached to the casing 1 instead of the casing fence member 2a and the support member 3 of the second embodiment (see FIGS. 4 to 6).

[0028]

As described above, according to the present invention, the entire circumference of the opening surface of the casing can be surrounded by the protective fence.
It is possible to prevent an accident in which a worker or a pedestrian falls into the inside. In addition, since each protective fence is composed of a combination of a plurality of shelf members and a pair of support members corresponding thereto, it is convenient to attach and detach the casing to and from the casing. Further, since the entire periphery of the opening peripheral portion of the casing can be surrounded, the safety of workers and passers-by can be further improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment.

2A is a partially omitted cross-sectional view taken along the line II-II of FIG. 1; FIG.

FIG. 3 is a partially exploded perspective view of the first embodiment.

FIG. 4 is a plan view of a second embodiment.

FIG. 5 is a sectional view taken along line VV in FIG. 4;

FIG. 6 is a perspective view of a lining plate according to a second embodiment.

FIG. 7 is a partially exploded perspective view of the third embodiment.

FIG. 8 (a) is a partially omitted cross-sectional view of the above-mentioned embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2, 2 'fence member 2a Casing fence member 2b Lining board shelf member 3, 3' Support member 4 Vertical pipe 5 Collar 6 Insertion leg 7 Auxiliary horizontal pipe 8 Auxiliary vertical pipe 9, 9 'Insert cylinder 10 Hook plate 11 Hook 12 Bolt hole 13 Nut 14 Fixing bolt 15 Bolt hole 16 Nut 17, 17 'Tightening bolt 18 Lining plate 19 Fitting part 21 Inner plate 22 Angle material 23 Fixing bolt 24 Suspension ring 25 Protective net

Claims (5)

[Claims] 1. A shaft protection fence attached to an upper peripheral edge of a casing inserted into an inner peripheral surface of a shaft, the shaft comprising a plurality of independent fence members and a pair of support members for each fence member. Each of the fence members has two parallel insertion legs at a lower end thereof at regular intervals, and the support member has an insertion tube for receiving the insertion leg and an integrated hook for detachably attaching the insertion tube to the casing. A shaft protection fence comprising: 2. A shaft protection fence attached to an upper peripheral portion of a casing inserted into an inner peripheral surface of a shaft, comprising a plurality of independent fence members and a pair of support members for each fence member. Each of the fence members has two parallel insertion legs at a lower end thereof at fixed intervals, and the support member has an integrated hook which is integrally attached to the insertion leg and detachably attached to the casing. Shaft protection fence characterized by the following. 3. A shaft protection fence used when half of an upper end opening surface of a casing inserted into an inner peripheral surface of a shaft is closed by a lining plate, and is attached to a peripheral edge of an upper end of the casing for an opened half circumference. A plurality of independent casing fence members, a pair of support members for each casing fence member, and a plurality of independent lining board fence members attached to the open side edge of the lining board. Each of the casing fence member and the lining plate fence member has two parallel insertion legs at a lower end thereof at regular intervals,
The support member has an insertion tube for receiving the insertion leg of the casing shelf member and an integrated hook for detachably attaching the insertion tube to the casing, and is provided on an open side edge of the lining plate. A shaft protection fence, wherein a pair of insertion tubes for receiving the insertion legs are attached to each of the lining plate fence members. 4. A shaft protection fence used when half of an upper end opening surface of a casing inserted into an inner peripheral surface of a shaft is closed by a lining plate, which is attached to a peripheral edge of an upper end of the casing corresponding to an opened half circle. A plurality of independent casing fence members, a pair of support members for each casing fence member, and a plurality of independent lining board fence members attached to the open side edge of the lining board. Each of the casing fence member and the lining plate fence member has two parallel insertion legs at a lower end thereof at regular intervals,
The support member is integrally attached to the insertion leg of the casing shelf member, has an integrated hook detachably attached to the casing, and has the lining on an open side edge of the lining plate. A shaft protection fence comprising a pair of insertion tubes for receiving the insertion legs for each plate fence member. 5. The shaft protection fence according to claim 3, wherein a protection net for closing an open portion of the casing is openably and closably attached to a side edge on an open side of the lining plate.