JP2001098573A - Lining plate for shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce weight of respective constitutive members, and facilitate handling by dividing the constitutive members in a lining plate for a shaft by arranging an upper plate for closing this by covering an opening part of the shaft upper end from above and a fitting part fitted to the inner diameter side of the opening part on the under surface. SOLUTION: A lining plate for a shaft is composed of a combination of both side upper plate side plates 1, 1' for covering respective semicircular parts by being butted on an opening part of a shaft and an intermediate plate 2 for covering a central part of the opening part, the inner peripheral edge 6 for forming a circular hole by the butting is arranged on the inside edge 4 of the respective upper plate side plates 1, 1', and the intermediate plate 2 is detachably placed on the inside of the circular hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft lining plate used for closing an opening of a shaft excavated to a required depth on the ground surface.

[0002]

2. Description of the Related Art In order to facilitate the handling of a lining plate for closing an opening of a shaft, there is known a lining plate formed by combining a pair of lining plate divided bodies having a shape obtained by dividing a lining plate into two. (See JP-A-10-131512).

[0003] The above two-part lining plate has the advantage that the weight of each lining plate divided body is reduced by half, so that the installation and removal thereof are easy.

[0004]

However, when the diameter of the opening at the upper end of the shaft increases, the size of each lining plate divided body also increases, and the weight of the reinforcing member also increases by that amount. The advantage of is not fully exhibited.

Accordingly, an object of the present invention is to further reduce the weight by increasing the number of divisions and to provide a safe and easy-to-use vertical shaft lining plate.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an upper plate which covers an opening at the upper end of a shaft from above and closes the opening, and a lower surface of the upper plate which covers the inner diameter of the opening. A vertical shaft lining plate having a fitting portion fitted to the upper plate, wherein the upper plate is abutted on the opening to cover each half-peripheral portion, and the upper plate side plates on both sides to cover the central portion of the opening. It is constituted by a combination of plates, and provided with a fitting portion divided body that forms the fitting portion by abutting its inner edge on the lower surface of each of the upper plate side plates. An inner peripheral edge for forming an intermediate plate hole corresponding to the intermediate plate is provided, and the intermediate plate is detachably mounted on the inner peripheral edge.

[0007] According to the above configuration, two upper side plates and one upper side plate are provided.
Since the sheet is divided into three members of the middle plate, the weight of each member and the simplicity of handling are measured. In addition, both upper side plates can be installed, the middle plate can be removed, and the central portion can be opened for use.

When the above-mentioned middle plate is formed by combining a plurality of middle plate divided bodies obtained by dividing the above-mentioned middle plate, or when each of the above-mentioned upper plate side plates is formed by combining a plurality of divided upper plate side plate bodies. In addition, the number of divisions is increased, and further weight reduction and easy handling of each member can be achieved.

A mounting member is provided along the inside of the semicircular inner peripheral edge of the upper side plate, and a portion of the mounting member protrudes inward from the inner peripheral edge to form a mounting edge. Configuration can be taken.

[0010] Further, a structure in which a safety fence is removably attached along the outside of the middle plate, or a structure in which a net-like or lattice-like lid is placed on a circular opening formed after removing the middle plate. Can be adopted.

[0011]

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

As shown in FIG. 1, the shaft lining plate for a shaft according to the first embodiment includes a pair of left and right upper plate side plates 1 and 1 ', a disk-shaped middle plate 2, and a safety fence 3 used as necessary. It is configured by a combination of

The inner side edges 4 of the upper side plates 1 and 1 'are abutted against each other, and the upper side plates 1 and 1' are connected to the opening 5 at the upper end of the shaft (see FIGS. 2 and 4). Are formed so as to cover the inside and outside thereof over their half circumferences, and a semicircular inner peripheral edge 6 is formed at the central portion of each inner edge 4.
By abutting the respective inner edges 4, 4, both inner peripheral edges 6, 6 are concentric with the above-mentioned opening 5, and form a circular inner plate hole 7 having a smaller diameter.

On the lower surface of each of the upper side plates 1 and 1 ′, semi-cylindrical fitting portions 8, 8 having a diameter slightly smaller than the opening 5 are coaxial with the inner peripheral edges 6, 6. The two end portions of the fitting portion divided bodies 8 reach the inner edges 4, 4, respectively.
By abutting both fitting part divided bodies 8, 8,
A cylindrical fitting portion 9 (see FIG. 2) is formed. A plurality of reinforcing plates 1 are provided at predetermined intervals in the circumferential direction between the inner surface of each of the fitting portion divided bodies 8 and 8 and the lower surfaces of the upper side plates 1 and 1 '.
1 is fixed.

The divided portion 8 of the fitting portion reinforced by the above-mentioned reinforcing plate 11 is provided with the upper side plates 1 and 1 'with respect to the opening 5 of the shaft.
And the upper side plates 1, 1 'themselves are reinforced.

Semi-cylindrical mounting members 12, 12 are fixed along the inner peripheral edges 6, 6 of the upper side plates 1, 1 '. As shown in FIGS. 1 and 4, each mounting member 12 has a U-shaped cross section, and the open surface of the U-shape corresponds to the fitting portion divided body 8.
Looking to the side. Further, the upper surface brim 13 projects slightly inward from the inner peripheral edge 6 to form the mounting edge 14. Each of the mounting members 12 also reinforces each of the upper side plates 1, 1 '.

The mounting edge 14 is provided with holes 15 (see FIG. 2) at predetermined intervals in the circumferential direction, and a support cylinder 16 corresponding to each hole 15 is provided with an upper flange 13 of the mounting member 12. And the lower flange 13 'are interposed and fixed (see FIG. 7). The pair of legs 3a, 3a of the safety fence 3 are inserted into the above-mentioned pair of holes 15 and the support cylinder 16 communicated therewith as necessary, and the safety fence 3 is mounted in an upright state.

Also, in one upper plate side plate 1, the inner surfaces of both ends of the fitting portion divided body 8 and the lower surface of the upper plate side plate 1 are
A shaped connecting member 17 (see FIG. 1) is fixed. One brim 18 of the connecting member 17 protrudes from the inner edge 4, and the protruding brim 18 is provided with a connecting hole 19. A connection protrusion 21 is provided on the lower surface of the other upper plate side plate 1 ′ opposite to the connection hole 19, and by inserting the connection protrusion 21 into the connection hole 19, the two upper plate side plates 1, 1 ′ are mutually connected. Linked to

The mounting edge 14 is provided with a required number of positioning holes 23 into which the positioning projections 22 of the intermediate plate 2 are inserted at appropriate intervals (see FIGS. 2 and 3).

A reinforcing member 24 having an I-shaped cross section is fixed to the lower surface of the intermediate plate 2 in the diametric direction, and a required number of reinforcing plates 25 are provided on both sides of the reinforcing member 24 and the lower surface of the intermediate plate 2. It is fixed. The middle plate 2 is reinforced by the reinforcing members 24 and the reinforcing plates 25. The outer edge of the reinforcing plate 25 contacts or approaches the inner peripheral edge of the mounting member 12 of each of the upper side plates 1, 1 'as shown in FIG. Is prevented from being displaced.

By inserting the above-described positioning projections 22 provided near the outer peripheral edge of the lower surface of the intermediate plate 2 into the positioning holes 23 of the mounting edge 14, positional displacement in the rotation direction within the plane as well as the plane direction is prevented. Is done.

The shaft lining plate of the first embodiment is as described above. To close the shaft opening 5 by using the shaft lining plate, as shown in FIG. On the upper surface of the casing 27 of the shaft, one upper plate side plate 1 is installed in a range extending from the ground surface around the casing 27 to above the opening 5, and the fitting portion divided body 8 is attached to the inner surface of the casing 27. Follow along. Next, the other upper plate side plate 1 ′ is installed in the same manner, and the connection protrusion 21 is inserted into the connection hole 19 of the upper plate side plate 1 previously installed to connect the two, and the two are connected on the diameter line of the opening 5. Abut the inner edges 4 of the.

The intermediate plate 2 is placed on the circular mounting edge 14 formed by the above-mentioned butting, and at the same time, the positioning projection 22 is inserted into the positioning hole 23 of the mounting edge 14.

On the other hand, the method of opening the opening 8 is to remove the intermediate plate 2 from the above-mentioned closed state and open the circular opening 28 formed by the inner diameter surface of the mounting edge 14 as shown in FIGS. The safety fence 3 is inserted into each of the pair of holes 15 provided in the mounting edge 14 and surrounds the circular opening 28. The safety fence 3 prevents a person or an article from falling on a worker who works inside the shaft. The safety fence 3 is partially removed when workers enter or leave or carry in / out equipment.

Next, in the second embodiment shown in FIGS. 8 and 9, the intermediate plate 2 is divided into
b is matched. In this case I
The reinforcing member 24 having a V-shaped cross section is fixed to one of the middle plate divisions 2a, a part of the upper surface brim 29 protrudes outward from the butt edge 31, and the butt edge 31 of the other middle plate division 2b is placed thereon. It is designed to be mounted on.

Further, holes 32 are provided at predetermined intervals along the outer peripheral edge of each of the above-mentioned intermediate plate divided bodies 2a, 2b. These holes 32 are provided in the support cylinder 16 fixed to the mounting member 12. Correspondingly (see FIG. 9B), the leg 3a of the safety fence 3 is inserted. The other configuration is the same as that of the above-described first embodiment, and the description is omitted.

Also in the case of the second embodiment, the opening 5 is closed and opened in the same manner as in the above-mentioned case. Is reduced by half so that handling is easier. When opening, the two middle plate divided bodies 2a and 2b are removed, and the safety fence 3 is mounted on the mounting edge 14 as in the case of the first embodiment.

At this time, as shown in FIG. 9 (b), it is possible to adopt a mode in which only one middle plate divided body 2a is left and the other one middle plate divided body 2b is removed. In this case, a semicircular opening 33 is formed. The safety fence 3 is attached to the mounting edge 14 at the opening 33, but is attached through the hole 32 of the middle plate divided body 2a at the closed portion. Thereby, the semicircular opening 33 can be surrounded by the safety fences 3 arranged in a ring shape.

In each of the above embodiments, FIG.
As shown in (a), each of the upper side plates 1 and 1 'is shown as a single piece, but as shown in FIG. Divided into two in the middle of
It can be constituted by the upper plate side plate divided bodies 1a, 1b and 1'a, 1'b.

As described above, both the upper plate side plates 1 and 1 'and the middle plate 2
Since each can be divided into multiple shapes,
As the combination, as schematically shown in FIG.
Combining one middle plate 2 or two middle plate divisions 2a and 2b with two upper plate side plates 1 and 1 '(see FIG. 3A), and four upper plate side plate divisions 1a, 1b, 1 '
It is possible to combine one middle plate 2 or two middle plate divisions 2a, 2b with a, 1'b. These combinations are properly used according to the situation at the work site.

As shown in FIG. 11, the middle plate 2 and the middle plate divisions 2a, 2b are formed in a square or rectangular shape, and the upper plate side plates 1, 1 ', the upper plate side plate divisions 1a, 1b, 1 'a, 1'
The inner peripheral edges 6, 6 of b may be formed in a square shape.

Next, in the third embodiment shown in FIG. 12, a net-shaped or lattice-shaped lid 34 is placed over a circular opening formed after the middle plate 2 is removed.
4 is mounted on the mounting edge 14. A hole 36 matching the support cylinder 16 is formed in the peripheral portion 35 thereof.
The safety fence 3 is provided to the support cylinder 16 through the hole 36.
Leg 3a is inserted. Other configurations are the same as those of the first embodiment.

With the above-described lid 34, light and air can be taken into the shaft while preventing the obstacle from falling, and the safety fence 3 can further enhance safety.

The lid 34 can be formed by combining two divided semicircular lids. As one usage example in that case, as shown in FIG. 13, one half of the circular opening is closed by only one lid divided body 34a, and the other half is opened as a semicircular opening 37 of the other half. It can also be used. Safety fence 3 is divided into lids 34
a and the mounting edge 1 of the semicircular opening 37
4 attached.

[0035]

As described above, the lining plate for a shaft according to the present invention is constituted by a combination of members divided into three or more points, so that the weight of each member is reduced and its handling is facilitated. There is. In addition, since the mode of the division is basically divided into the upper side plate and the middle plate on both sides, it is possible to use an opening provided in the center at the time of work,
It is convenient for workers to enter and exit and to carry in and out equipment. Furthermore,
It is safe because the opening can be surrounded by the safety fence.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment.

FIG. 2 is a plan view of the above-mentioned closed state.

FIG. 3 is a bottom view of the above-mentioned closed state.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a plan view of the above open state;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is an enlarged sectional view taken along line VII-VII of FIG. 5;

FIG. 8A is an exploded perspective view of a middle plate portion of the second embodiment.

9A is a plan view of a usage example of the second embodiment, and FIG. 9B is an enlarged cross-sectional view of FIG.

10 (a) Combination diagram of upper plate side plate and circular middle plate (b) Combination diagram of upper plate side plate and circular middle plate

FIG. 11 (a) Combination diagram of upper plate side plate and square middle plate (b) Combination diagram of upper plate side plate and square middle plate

12A is a plan view of a usage example of the third embodiment. FIG. 12B is a cross-sectional view taken along line bb in FIG.

FIG. 13 is a plan view of a usage example of the third embodiment.

[Explanation of symbols]

 1, 1 'Upper plate side plate 1a, 1b Upper plate side plate divided body 2 Middle plate 2a, 2b Middle plate divided body 3 Safety fence 3a Leg 4 Inner edge 5 Opening 6 Inner peripheral edge 7 Middle plate hole 8 Fitting portion divided body 9 Fitting portion 11 Reinforcement plate 12 Placement member 13 Upper collar 13 'Lower collar 14 Mounting edge 15 Hole 16 Support cylinder 17 Connection member 18 Collar 19 Connection hole 21 Connection protrusion 22 Positioning protrusion 23 Positioning hole 24 Reinforcement member 25 Reinforcement plate 26 Ground 27 Casing 28 Circular opening 29 Top flange 31 Butt edge 32 Hole 33 Opening 34 Lid 34a Lid split 35 Peripheral edge 36 Hole 37 Semicircular opening

Claims (6)

[Claims] 1. An upright lining plate comprising an upper plate which covers an opening at the upper end of a shaft from above and closes the opening, and a fitting portion which fits on the lower surface of the shaft at the inner diameter side of the opening. ,
The upper plate is constituted by a combination of upper plate side plates which abut each other on the opening and covers each half-circumferential portion, and a middle plate which covers a central portion of the opening, and a lower surface of each upper plate side plate has an inner edge. The fitting portion divided body that forms the fitting portion is provided by butting, and an inner peripheral edge that forms a middle plate hole that matches the middle plate is provided at the inner edge of each of the upper plate side plates. A lining plate for a shaft, wherein the middle plate is detachably mounted on a peripheral edge. 2. The lining plate for a shaft according to claim 1, wherein the middle plate is formed by combining a plurality of divided middle plates. 3. The lining plate for a shaft according to claim 1, wherein each of the upper plate side plates is formed by combining upper plate side plate divided bodies obtained by dividing the upper plate side plates into a plurality. 4. A mounting member is provided along the inner peripheral edge of the upper side plate, and a portion of the mounting member protrudes inward from the inner peripheral edge to form a mounting edge. The lining plate for a shaft according to any one of claims 1 to 3. 5. The lining plate for a shaft according to claim 1, wherein a safety fence is detachably attached along the outside of the middle plate. 6. The lining plate for a shaft according to any one of claims 1 to 5, wherein a mesh-like or lattice-like lid is placed over an opening formed after removing the middle plate.