JP6259265B2 - Cover construction method for ground opening of large section shaft and lid structure - Google Patents

Description

  The present invention relates to a method of constructing a lid on a ground opening of a large cross-section shaft and a lid structure thereof.

  In a large-section shaft, when a safety lid is hung on an opening on the ground, it is common to lay a large lid and cover it with a large crane or the like.

For example, Patent Document 1 proposes a canopy for a small-section vertical shaft having a diameter of 3 m or 3.5 m installed as a water collection well.
The lid for the small cross-section shaft is composed of a rail member having a weight that can be transported and constructed manually and a plurality of divided panels. The rail member is composed of a plurality of beam members having mounting portions at both ends, and is bridged over the top end of the small section vertical shaft. The plurality of divided panels are made of a ceiling member having a frame frame, and at least two of the divided panels are provided so that the frame frame straddles two adjacent beam members of the rail member. And the remainder of the some division | segmentation panel provided with the frame frame mounted on a top end and a beam material is attached to the shaft opening part of the both outer sides of a rail member.

JP 2012-12806 A

However, a space for grounding a large lid is required on the ground around the opening of the large section vertical shaft.
And since it is a big cover hung on the ground opening part of a large cross-section shaft and becomes a cover structure of considerable weight, a large crane is required.
Moreover, since the big lid | cover hung on the ground opening part of a large cross-section shaft cannot be divided | segmented into a very fine part, a large vehicle is needed for the conveyance.
Furthermore, a large crane is also required when the lid needs to be removed for maintenance.

Moreover, although the lid | cover for small cross-section shafts of patent document 1 can be conveyed and constructed manually, the rail member spanning the top end of a small cross-section shaft is comprised of a plurality of beam members, and has a frame. The ceiling member is composed of a plurality of divided panels. And at least two division panels are provided so that a frame frame may straddle two beam materials which a rail member adjoins, and also a frame frame which mounts on a top end and a beam material in the shaft opening part of the both outer sides of a rail member The remainder of the plurality of split panels with is attached.
That is, it is a lid having a special structure configured by combining a rail member and a panel member having a special shape, and the cost increases.

  The object of the present invention is to allow a lid to be hung on the ground opening of a large section vertical shaft for safety to be easily suspended and fixed by a unic car without using a large crane, The purpose is to improve the efficiency of installation work of the ground opening lid and reduce the cost.

In order to solve the above problems, the invention described in claim 1
The substantially fan-shaped lid in which the ground openings are arranged in the circumferential direction by placing a substantially fan-shaped lid dividing member around the ground opening of the large cross-section shaft and sequentially arranging them in the circumferential direction. A method of covering with a divided member ,
The first substantially fan-shaped lid dividing member is placed around the ground opening, and the first substantially fan-shaped lid dividing member is diametrically opposed to the first substantially fan-shaped lid dividing member. The lid dividing member is placed, and the first and second substantially fan-shaped lid dividing members opposed to each other in the diameter direction are coupled by an X-shaped beam-shaped connecting member .

The invention described in claim 2
It is a lid construction method of the ground opening of the large cross-section shaft according to claim 1,
The first and second lid dividing members opposed to each other in the diametrical direction of the ground opening are coupled by the X-shaped beam-shaped connecting member, and then placed around the ground opening and sequentially in the circumferential direction. The substantially fan-shaped lid dividing members to be arranged are sequentially fixed to each other.

The invention according to claim 3
A lid construction method for a ground opening of a large cross-section shaft according to claim 1 or 2 ,
Hook the substantially fan-shaped lid dividing member on the hook provided on the periphery of the ground opening ,
A bracket provided on the lower surface of the substantially fan-shaped lid dividing member is brought into contact with the inner peripheral surface of the ground opening .

The invention according to claim 4
It is a lid construction method of the ground opening part of the large cross-section shaft according to any one of claims 1 to 3 ,
After covering the ground opening with the substantially fan-shaped lid dividing member,
By removing the X-shaped beam-shaped connecting member, a central hole formed between the distal ends of the substantially fan-shaped lid dividing member covering the ground opening is closed with a central lid, and the central lid is It fixes to the front-end | tip part of the substantially fan-shaped cover division | segmentation member, It is characterized by the above-mentioned.

The invention described in claim 5
In the structure of the lid covering the ground opening of the large cross-section vertical shaft, the lid dividing member substantially fan-shape placed around the ground opening, a lid structure configured by arranging in the circumferential direction of the ground opening,
The substantially fan-shaped lid dividing member first placed around the ground opening;
The first substantially fan-shaped lid dividing member and the second substantially fan-shaped lid dividing member that is placed second around the ground opening in a diametrical direction;
An X-shaped beam-shaped connecting member in which the first and second substantially fan-shaped lid dividing members opposed in the diametrical direction are coupled;
The substantially fan-shaped lid dividing member that is placed around the ground opening and sequentially arranged in the circumferential direction and sequentially fixed to each other;
An opening lid provided with is configured .

The invention described in claim 6
It is a lid structure of the ground opening of the large cross-section shaft according to claim 5 ,
The X-shaped beam-shaped connecting member is removed, and a central hole formed between the distal end portions of the substantially fan-shaped lid dividing member placed side by side in the circumferential direction of the ground opening is closed, and the ground A central lid fixed to the tip of the substantially fan-shaped lid dividing member placed side by side in the circumferential direction of the opening is provided .

The invention described in claim 7
The lid structure of the ground opening of the large cross-section shaft according to claim 5 or 6 ,
The substantially fan-shaped lid dividing member is:
A flat frame formed of aggregate in the substantially fan shape;
And an expanded metal fixed to the substantially fan-shaped flat frame .

The invention according to claim 8 provides:
It is a lid structure of the ground opening of the large cross-section shaft according to claim 7 ,
A base end portion placed around the ground opening of the substantially fan-shaped flat frame is supported by a hook provided on the periphery of the ground opening,
A bracket provided under the base end side of the substantially fan-shaped flat frame is in contact with an inner peripheral surface of the ground opening .

The invention according to claim 9 is:
A lid structure for a ground opening of a large cross-section shaft according to any one of claims 5 to 8 ,
The substantially fan-shaped lid dividing member includes a maintenance opening / closing lid.

The invention according to claim 10 is:
It is a lid structure of the ground opening of the large cross-section shaft according to claim 9 ,
The substantially fan-shaped lid dividing member includes a stair for opening and closing the opening / closing lid.

The invention according to claim 11
It is a lid structure of the ground opening of the large cross-section shaft according to claim 8 ,
The bracket is provided by being selected from a plurality of mounting positions with respect to the substantially fan-shaped flat frame .

  According to the present invention, the lid that is hung for safety on the ground opening of the large cross-section shaft is divided into a substantially fan-shaped shape that can be fixed independently, so that it can be suspended by a UNIC vehicle or the like without using a large crane. The fixing work and the removing work can be performed, and the efficiency of the installation / removal work of the large-section vertical shaft ground opening lid can be reduced and the cost can be reduced.

It is a perspective view which shows the structure of one Embodiment of the ground opening part of the large cross-section shaft to which this invention is applied, and its cover. It is an enlarged view which shows the initial installation state of the substantially fan-shaped cover division | segmentation member of FIG. It is a top view which shows the installation state of the 1st and 2nd cover division member. FIG. 4 is a central sectional view taken along the line AA in FIG. 3. It is an enlarged view of the center part of FIG. It is an expansion perspective view which shows the connection state of the 1st and 2nd cover division | segmentation member of FIG. It is a top view which shows installation of the lid | cover division | segmentation member after the 3rd. It is the top view (a) and side view (b) of the lid | cover division | segmentation member which have an opening-and-closing lid. It is a side view which shows the example of selection of the attachment position of the bracket with respect to the flame | frame of a lid | cover division | segmentation member. It is a perspective view which shows the cover structure of the modification 1. It is an enlarged view which shows the installation state of the lid | cover division | segmentation member of FIG. It is a perspective view which shows the cover structure of the modification 2.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment)
FIG. 1 shows a configuration of an embodiment of a ground opening of a large cross-section shaft and its lid to which the present invention is applied, wherein 1 is the ground opening of the large cross-section shaft and 10 is its opening lid.

As shown in the figure, for example, an opening lid 10 that covers the ground opening 1 of a large cross-section shaft having an inner diameter of about 12 m is formed in a circular shape by arranging substantially fan-shaped lid dividing members 11 on the upper surface of the opening peripheral wall 2 in the circumferential direction. It is configured.
On the upper surface of the peripheral wall 2 of the opening, protective fences 3 are arranged side by side in the circumferential direction, and hooks 4 whose tips protrude on the outer circumferential side are installed at equal intervals in the circumferential direction at the inner circumferential side position. ing. The hook 4 is fixed to the opening peripheral wall 2 with an anchor. Depending on the shape and size, the hook 4 may be omitted, and the lid dividing member 11 may be directly fixed by an anchor installed on the peripheral wall 2 of the opening.

FIG. 2 shows an initial installation state of the substantially fan-shaped lid dividing member 11. The lid dividing member 11 is substantially fan-shaped according to a predetermined center angle of the ground opening 1 of the large cross-section shaft as shown in the figure. An expanded metal 13 is attached to a frame 12 in which an aggregate is assembled in a mold shape.
Further, a bracket 14 is provided on the lower surface of the frame 12 so as to come into contact with the inner peripheral surface of the opening peripheral wall 2.

When the above substantially fan-shaped lid dividing member 11 is first installed, the lid dividing member 11 is suspended by a unillustrated unillustrated vehicle and installed on the upper surface of the opening peripheral wall 2 as shown in FIG. The horizontal aggregate 12a on the wide side of the frame 12 is inserted from the outer peripheral side below the protruding portions of the pair of hooks 4.
Thereby, the bracket 14 provided in the lower surface of the lid | cover division | segmentation member 11 will be in a contact state to the internal peripheral surface of the opening surrounding wall 2 like illustration.
Therefore, the substantially fan-shaped lid dividing member 11 is cantilevered on the opening peripheral wall 2 on its wide side.

  Next, the second lid dividing member 11 is similarly suspended from the first substantially fan-shaped lid dividing member 11 at a position opposite to the diameter direction of the opening peripheral wall 2 as shown in FIGS. 3 and 4. Similarly, the hook 4 and the bracket 14 are cantilevered on the peripheral wall 2 of the opening.

Then, the first lid splitting member 11 and the second lid splitting member 11 facing in the diametrical direction are bolted together with an X-shaped beam-like connecting member 21 as shown in FIG. 5 and FIG. To do.
In this case, the connecting member 21 is also suspended in the same manner, and an operator rides on each lid dividing member 11 to perform a bolt coupling operation.

After that, as shown in FIG. 7, the third and subsequent lid dividing members 11 are similarly suspended and cantilevered on the opening peripheral wall 2 by the hooks 4 and the brackets 14, and the lid dividing members 11 arranged in the circumferential direction thereof. Are sequentially fixed to each other with bolts.
Thus, the ground opening 1 is covered with the circular opening lid 10 in which the substantially fan-shaped lid dividing members 11 are arranged in the circumferential direction.

  Finally, after removing the connecting member 21 and removing it with a UNIC wheel, the circular hole formed between the tips of the substantially fan-shaped lid dividing members 11 arranged in the circumferential direction is covered with a circular central lid 19, The central lid 19 is bolted to the tip of the frame 12 to complete the opening lid 10.

  As described above, according to the construction of the large cross-section shaft cover of the embodiment, the substantially fan-shaped lid dividing member 11 capable of fixing the open cover 10 to be hung for safety on the ground opening 1 of the large cross-section shaft is opened. By placing on the surrounding wall 2 and arranging it in the circumferential direction, it can be suspended and fixed with a UNIC car, etc. without using a large crane. Cost reduction can be achieved.

  In addition, since the opening lid 10 is configured by the substantially fan-shaped lid dividing member 11 that can be fixed independently, if it is damaged after completion, for example, only one piece of the lid dividing member 11 may be replaced for maintenance. Can be handled relatively easily.

Next, FIGS. 8A and 8B show an example in which the lid dividing member 11 is provided with an opening / closing lid 15.
That is, considering the case of entering the ground opening 1 for maintenance or the like, as shown in the figure, an opening / closing lid 15 for an operator to enter and exit is provided on the wide side of the substantially fan-shaped lid dividing member 11. Thus, a staircase 16 projecting downward and a handrail 17 projecting upward are provided.

FIG. 9 shows an example of selection of the mounting position of the bracket 14 with respect to the frame 12 of the lid dividing member 11.
That is, in consideration of diversion at other sites, for example, three bolt coupling positions A, B, and C are set as attachment positions of the bracket 14 to the frame 12 of the lid dividing member 11 as illustrated. Thus, it becomes possible to cope with the difference in the diameter of the large section vertical shaft.

(Modification 1)
FIG. 10 shows the lid structure of the modified example 1. As in the above-described embodiment, 1 is the ground opening of the large cross-section shaft, 2 is the surrounding wall of the opening, 3 is the guard fence, and 30 is the opening lid. is there.
In addition to the flat lid structure of the above-described embodiment, the opening lid 30 of Modification 1 has a mountain-shaped lid structure as illustrated.

  That is, FIG. 11 shows an initial installation state of the substantially fan-shaped lid dividing member 31. As shown in the figure, the substantially fan-shaped lid dividing member 31 is configured by attaching an expanded metal 33 to a frame 32. A fixed column set 34 is provided at the wide side end of the frame 32.

  Then, with the wires 35 hung between the left and right column upper ends of the column set 34 and the tip of the frame 32, the column set 34 is fixed to the upper surface of the peripheral wall 2 by bolting and fixing. The front end portion of the frame 32 that has a shape that rises ahead of the upper end portion of the column 34 is made higher.

  In this way, the substantially fan-shaped lid dividing members 31 that are cantilevered and fixed to the peripheral wall 2 of the opening are arranged in the circumferential direction to cover the ground opening 1, and then are arranged in the circumferential direction. A central lid 39 is put on a circular hole formed between the tips of the mold-shaped lid dividing member 31 and bolted to complete the mountain-shaped opening lid 30.

  Thus, the mountain-shaped opening lid 30 may be used.

(Modification 2)
FIG. 12 shows the lid structure of the modified example 2. As in the above-described embodiment, 1 is the ground opening of the large cross-section shaft, 2 is the surrounding wall of the opening, 3 is the guard fence, and 40 is the opening lid. is there.
The opening lid 40 of the modified example 2 has a dome-shaped lid structure as illustrated.

  That is, as shown in the figure, the substantially fan-shaped lid dividing member 41 is formed by attaching an expanded metal 43 to an arc-shaped frame 42 that swells upward in a truss structure, and is fixed to the wide side end of the frame 42. A support post set 44 is provided.

  Then, in a state where the column set 44 is bolted and fixed to the upper surface of the opening peripheral wall 2, the tip end portion of the arc-shaped frame 32 bulging upward with a truss structure is higher than the column upper end portion of the column set 44. To do.

  In this way, the substantially fan-shaped lid dividing members 41 that are cantilevered and fixed to the peripheral wall 2 of the opening are arranged in the circumferential direction to cover the ground opening 1 to complete the dome-shaped opening lid 40.

  Thus, it is good also as a dome-shaped lid structure.

(Other variations)
In the above embodiment, although a circular shaft is used, the present invention is not limited to this, and may be an elliptical or oval shaft.
Further, the configuration of the lid dividing member is arbitrary, and it is needless to say that other specific detailed structures can be appropriately changed.
For example, instead of the expanded metal, for example, when used for a blast protection lid, a stronger reinforcing bar mesh may be used. Further, when it is desired to prevent rain, an iron plate or a plastic plate may be used. Further, the frame may be wooden.

DESCRIPTION OF SYMBOLS 1 Ground opening of large-section shaft 2 Opening surrounding wall 3 Guard fence 4 Hook 10 Opening lid 11 Lid dividing member 12 Frame 13 Expanded metal 14 Bracket 15 Opening and closing lid 16 Staircase 17 Handrail 19 Central lid 21 Connecting member 30 Opening lid 31 Lid division Member 32 Frame 33 Expanded metal 34 Column set 35 Wire 39 Central lid 40 Opening lid 41 Lid split member 42 Frame 43 Expanded metal 44 Column set

Claims (11)

The substantially fan-shaped lid in which the ground openings are arranged in the circumferential direction by placing a substantially fan-shaped lid dividing member around the ground opening of the large cross-section shaft and sequentially arranging them in the circumferential direction. A method of covering with a divided member ,
The first substantially fan-shaped lid dividing member is placed around the ground opening, and the first substantially fan-shaped lid dividing member is diametrically opposed to the first substantially fan-shaped lid dividing member. A large-section vertical shaft characterized in that a lid splitting member is placed and the tip portions of the first and second substantially fan-shaped lid splitting members facing each other in the diametrical direction are joined by an X-shaped beam-shaped connecting member. How to install the lid of the ground opening. The first and second substantially fan-shaped lid dividing members facing the diameter direction of the ground opening are coupled by the connecting member, and then placed on the periphery of the ground opening. 2. The method of constructing a lid for a ground opening of a large cross-section shaft according to claim 1, wherein the substantially fan-shaped lid dividing members that are sequentially arranged in a direction are fixed to each other sequentially. Hook the substantially fan-shaped lid dividing member on the hook provided on the periphery of the ground opening ,
The lid of the ground opening portion of the large-section shaft according to claim 1 or 2 , wherein a bracket provided on a lower surface of the substantially fan-shaped lid dividing member is brought into contact with an inner peripheral surface of the ground opening portion. Construction method. After covering the ground opening with the substantially fan-shaped lid dividing member,
By removing the X-shaped beam-shaped connecting member, a central hole formed between the distal ends of the substantially fan-shaped lid dividing member covering the ground opening is closed with a central lid, and the central lid is It fixes to the front-end | tip part of the substantially fan-shaped cover division | segmentation member, The lid construction method of the ground opening part of the large cross-section shaft as described in any one of Claim 1 to 3 characterized by the above-mentioned.   A lid structure that covers the ground opening of a large cross-section shaft, a substantially fan-shaped lid splitting member that is placed around the ground opening, and a lid structure that is arranged in the circumferential direction of the ground opening,
  The substantially fan-shaped lid dividing member first placed around the ground opening;
  The first substantially fan-shaped lid dividing member and the second substantially fan-shaped lid dividing member that is placed second around the ground opening in a diametrical direction;
  An X-shaped beam-shaped connecting member in which the first and second substantially fan-shaped lid dividing members opposed in the diametrical direction are coupled;
  The substantially fan-shaped lid dividing member that is placed around the ground opening and sequentially arranged in the circumferential direction and sequentially fixed to each other;
  A lid structure for a ground opening portion of a large-section vertical shaft, characterized in that an opening lid is provided.   The X-shaped beam-shaped connecting member is removed, and a central hole formed between the distal end portions of the substantially fan-shaped lid dividing member placed side by side in the circumferential direction of the ground opening is closed, and the ground 6. The lid of the ground opening of a large cross-section shaft according to claim 5, further comprising a central lid fixed to the tip of the substantially fan-shaped lid dividing member placed side by side in the circumferential direction of the opening. Construction.   The substantially fan-shaped lid dividing member is:
  A flat frame formed of aggregate in the substantially fan shape;
  The lid structure for a ground opening of a large cross-section shaft according to claim 5 or 6, further comprising an expanded metal fixed to the flat frame having a substantially fan shape. A base end portion placed around the ground opening of the substantially fan-shaped flat frame is supported by a hook provided on the periphery of the ground opening,
The large cross-section shaft according to claim 7, wherein a bracket provided under the base end side of the substantially fan-shaped flat frame is in contact with an inner peripheral surface of the ground opening. The lid structure of the ground opening. The lid structure for a ground opening of a large cross-section shaft according to any one of claims 5 to 8, wherein the substantially fan-shaped lid dividing member includes an open / close lid for maintenance . The lid structure for a ground opening of a large cross-section shaft according to claim 9, wherein the substantially fan-shaped lid dividing member includes a step for opening and closing the opening / closing lid . 9. The lid structure for a ground opening of a large cross-section shaft according to claim 8, wherein the bracket is provided by being selected from a plurality of attachment positions with respect to the substantially fan-shaped flat frame .

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