JP2505389B2 - Shaft protection wall and its opening / closing door guide metal fittings - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical shaft protection wall constructed to protect a wall surface of an excavation hole such as a vertical shaft or a deep foundation construction method, and a guide metal fitting for an opening / closing door thereof.

[0002]

2. Description of the Related Art Generally, when excavating a shaft, as shown in FIGS. 9 and 10, every time the excavation hole 1 is dug down to a certain depth so that the wall surface after excavation is not collapsed, The protective wall 10 is constructed by sequentially attaching the liner plate 2 with each other. As well known, the liner plate 2 is a corrugated plate such as a steel plate, and has horizontal flanges 3a, 3a provided around the corrugated plate and vertically-opposed vertical flanges 4b, 4b (4b is not shown). The liner plate 2 is integrally provided, and these flanges are butted against each other vertically and horizontally, and are connected by bolts 5 and nuts 6, whereby the liner plate 2 is attached to the entire inner wall surface of the excavated hole 1. As a concrete work, the upper lateral flange 3a of the liner plate 2 to be mounted is applied to the lower lateral flange 3b of the lowermost liner plate 2 which has already been fixed from below, and the flanges 3a, 3a are bolted to each other by bolts 5.
And it is attached by tightening with the nut 6. The liner plates 2 adjacent to each other in the circumferential direction are attached by tightening their vertical flanges with bolts and nuts.

In this case, when the vertical flanges 4a provided on both side ends of the liner plate 2 are aligned in a straight line in the vertical direction, the overall proof stress is weakened. Therefore, the vertical flanges are staggered in the circumferential direction so as to be staggered. Assembling. If the liner plate 2 is insufficient in strength, it is reinforced by the reinforcing ring 7. The reinforcing ring 7 is generally made of an H-shaped steel material or the like and is interposed between the upper and lower liner plates 2 at appropriate intervals.
It is fastened and fixed to the lower lateral flange 3b of the liner plate 2 mounted therein by bolts 5 and nuts 6.
Then, on the lower surface side of the reinforcing ring 7, the upper lateral flange 3a of the liner plate 2 to be mounted is fixed by bolts and nuts 5 and 6 similarly.

The shaft protection wall 10 constructed in this way
In order to ensure safety, the upper end is above the ground surface at a predetermined height (1
m) It is obligatory that the structure is protruding and that there is no open portion around the entire circumference. However, it is inconvenient to get in and out of the vertical shaft protection wall, and to raise and lower winches and liner plates, etc., and it is difficult to see the inside.Therefore, a part of the peripheral surface is cut out to provide an open part. He goes in and out, and raises and lowers equipment. And when it is not in use, the open part is blocked so that it cannot be accessed with a chain or pipe.

[0005]

However, just hanging a chain or a pipe is incomplete, and there is a problem in safety. Therefore, there is a demand for a vertical shaft protection wall that can completely cover the open portion when not in use.

The present invention has been made in view of the above-mentioned problems and demands of the prior art. The object of the present invention is to provide an openable / closable door to completely cover the open portion when not in use. The purpose is to provide a vertical shaft protection wall that can improve safety. Another object of the present invention is to provide an opening / closing door guide fitting for slidably guiding and supporting the opening / closing door of the vertical shaft protection wall along the peripheral surface of the vertical shaft protection wall.

[0007]

In order to achieve the above object, a shaft protection wall according to the present invention has one of upper end portions protruding above the surface of the shaft protection wall composed of a liner plate attached along the wall surface of the shaft. An opening is provided on the peripheral surface of the shaft, and an opening / closing door that is slidable in the circumferential direction of the vertical shaft protection wall is provided in the opening. The opening / closing door includes guide metal fittings attached to both ends in the sliding direction, and an inclination preventing means. Has and
The guide metal fittings are guided and supported by the lateral flanges of the liner plate located below and laterally of the open portion, respectively, and the inclination preventing means has a roller that abuts on the surface side groove portion of the liner plate. The feature is that the distance between the doors is kept constant. Further, the opening / closing door guide metal fitting according to the present invention covers the open portion provided on a part of the peripheral surface of the upper end portion projecting above the surface of the shaft protection wall made of the liner plate attached along the shaft wall. An opening / closing door guide fitting for guiding a slidable opening / closing door, wherein the guide fitting is a plate attached to the opening / closing door and a lateral flange of the liner plate rotatably arranged on the lower surface of the plate. It is characterized in that it is provided with a roller that rolls on the upper surface and a pair of guide rods that are vertically provided on the lower surface of the plate and that are located on both sides of the lateral flange with the lateral flange interposed therebetween.

[0008]

The opening / closing door slides along the peripheral surface of the vertical shaft protection wall and closes the opening when not in use. The guide fitting has a roller, moves on the vertical flange of the liner plate, and is prevented from rattling in the front-rear direction by the guide rod. The tilt preventing means keeps the gap between the liner plate and the opening / closing door constant by the roller contacting the groove on the front surface side of the liner plate, and prevents the opening / closing door from tilting in the surface direction.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. 1 is a perspective view of an essential part showing an embodiment of a vertical shaft protection wall according to the present invention, FIG. 2 is a plan view of a first opening / closing door guide metal fitting, FIG. 3 is a side view of the same metal fitting, and FIG. 5 is a front view of the second opening / closing door guide fitting, FIG. 6 is a side view of the fitting, FIG. 7 is a front view of the first locking fitting, and FIG. 8 is a view of the second locking fitting. It is a front view. In the figure, the same components as those in FIGS. 9 and 10 are designated by the same reference numerals, and the description thereof will be omitted. In these drawings, an open portion 20 corresponding to two liner plates is provided on a part of the peripheral surface of the upper end portion of the vertical shaft protection wall 10 that protrudes above the surface 11, and this open portion 20 is also provided. Two opening / closing doors 21 having the same structure and slidable in the circumferential direction of the vertical shaft protection wall 10 are provided.

The opening / closing door 21 is made of the same material as the liner plate 2 of the vertical shaft protection wall 10, so that the upper and lower flanges 21a and 21b are bent vertically inward at the upper and lower edges to oppose each other. It is provided integrally. Further, both ends of these flanges 21a and 21b are bent downward at substantially right angles. Then, the first opening / closing door guide metal fitting 23 and the inclination preventing means 32 are attached to the upper surface of the opening side (arrow A direction) side end of the opening / closing door 21, and the closing direction (direction opposite to the arrow A) side end. Second opening / closing door guide fittings 37 are attached to the lower surfaces of the parts.

As shown in FIGS. 2 and 3, the first opening / closing door guide fitting 23 is a flat plate shape fixed to the upper flange 21a of the opening / closing door 21 by a plurality of bolts and nuts (not shown). Plate 25, and the open portion 2 which is rotatably disposed at one end of the lower surface of the plate 25.
A roller 26 rolling on the upper surface of the upper lateral flange 2a of the uppermost liner plate 2 located on the side of 0, and a pair of rollers 26 hung on the lower surface of the plate 25 and sandwiching the liner plate 2 on both sides thereof. Guide rods 27a, 27
and b. In this case, the inner guide rod 27
Although a is formed longer than the outer guide rod 27b, it may have the same length. In addition, 29 is a bolt mounting hole.

The tilt preventing means 32 has a roller mounting member 33 (FIG. 4) which is fixed to the side end surface of the opening / closing door 21 and has a T-shape in a horizontal direction in a front view. The roller mounting member 33 has a horizontal arm portion 33A. A roller 35 that extends rearward of the opening / closing door 21 and that abuts and rolls on the front surface side groove portion 34 of the liner plate 2 is attached to the tip of the opening / closing door 21. I am trying to hold it.

As shown in FIGS. 5 and 6, the second opening / closing door guide metal fitting 37 attached to the lower surface of the end of the opening / closing door 21 in the closing direction (the direction opposite to the arrow A) is opened and closed as shown in FIGS. An L-shaped plate 38 fixed to the lower flange 21a of the door 21 by a plurality of bolts and nuts (not shown), and an L-shaped plate 38 rotatably disposed at one end of the lower surface of the plate 38 and below the opening 20. Roller 40 rolling on the upper surface of the upper lateral flange 3a of the liner plate 2 at the second stage from above, and a pair of rollers 40 hung on the lower surface of the plate 38 and sandwiching the liner plate 2 on both sides thereof. It is composed of guide rods 41a and 41b. These guide rods 41a and 41b have different lengths for the same reason as the guide rods 27a and 27b of the first guide metal fitting 23, but needless to say, may have the same length.

Further, as shown in FIGS. 1, 7 and 8, first and second locking metal fittings 43, 44 are fixed to the end faces of the two opening / closing doors 21 in the closing direction by bolts and nuts, respectively. . A pair of small holes 46 (46A, 46B) to which one ends of upper and lower chains 45 (45A, 45B) are connected are formed in the first locking metal fitting 43, and each of the second locking metal fittings 44 is formed. A pair of hooks 47 (47A, 47B) that lock the chain 45 are attached. The chain 45 is used to close the gap between the left and right opening / closing doors 21 when the opening 20 is closed and prevent movement of the opening / closing door 21 when closed.

In the vertical shaft protection wall 10 having such an opening / closing door 21, when not in use, the left and right opening / closing doors 21 are closed and the chain 45 is locked to the hook 47 so that the opening portion 20 is opened.
Can be closed almost completely. Chain 45 during work
1 and the opening / closing doors 21 are slid along the outer peripheral surface of the vertical shaft protection wall 10 in the direction of arrow A in FIG. The opening / closing door 21 can be easily opened / closed by the rollers 26, 40 rolling on the upper lateral flange 3a of the liner plate 2. Further, the tilt prevention means 32 is provided with the guide rods 27a, 27b, 41a, 4 of the first and second guide fittings 23, 37.
The inclination of the opening / closing door 21 is prevented together with 1b, and the distance between the door 21 and the liner plate 2 is kept constant.

As described above, according to the present invention, since the opening / closing door 21 is provided and the opening 20 is closed by the opening / closing door 21 when not in use, a vertical shaft protection wall having substantially no opening can be obtained. It is possible to provide a shaft protection wall that has improved safety and meets safety standards. Further, the structure of the opening / closing door 21 and the guide fittings 23, 37 is also simple, and the opening / closing door 21 can be opened / closed with a slight force.

In the above embodiment, the case where the two opening / closing doors 21 are provided has been described. However, the present invention is not limited to this, and it is 1 for a small vertical shaft protection wall 10. Of course, an opening / closing door may be provided.

[0018]

As described above, in the vertical shaft protection wall according to the present invention, since the slidable opening / closing door for opening and closing the opening portion provided on a part of the peripheral surface of the upper end portion is provided, the opening portion is opened when not in use. Can be closed and the safety can be improved. In addition, opening and closing the door at the time of work makes it easy to enter and exit the shaft protection wall, carry in and out equipment,
Workability can be improved. Further, the opening / closing door guide metal fitting according to the present invention not only has a simple structure, but also includes a roller that rolls on the upper surface of the flange of the liner plate, so that the opening / closing door can be opened and closed with a small force,
Easy to open and close.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of a vertical shaft protection wall according to the present invention.

FIG. 2 is a plan view of a first opening / closing door guide fitting.

FIG. 3 is a side view of the metal fitting.

FIG. 4 is a front view of a tilt prevention unit.

FIG. 5 is a plan view of a second opening / closing door guide fitting.

FIG. 6 is a side view of the metal fitting.

FIG. 7 is a front view of a first locking fitting.

FIG. 8 is a front view of a second locking fitting.

FIG. 9 is a perspective view of a main part of a vertical shaft protection wall.

FIG. 10 is a cross-sectional view of a liner plate.

[Explanation of Codes] 2 ... Liner plate, 3a ... Upper lateral flange, 7 ... Reinforcement ring, 10 ... Vertical shaft protection wall, 20 ... Opening part, 21 ... Open / close door, 23 ... First open / close door guide metal fitting, 25 ... Plate, 26 ... Roller, 27a, 27b ... Guide rod, 32 ...
Tilt prevention means, 35 ... Roller, 37 ... Second opening / closing door guide metal fitting, 38 ... Plate, 40 ... Roller, 41a, 4
1b ... a guide rod.

Claims (2)

(57) [Claims] 1. An opening is provided on a part of a peripheral surface of an upper end of the shaft protection wall, which is made up of a liner plate attached along the wall of the shaft, and protrudes above the surface of the shaft. A slideable opening / closing door is provided in the opening / closing door. The opening / closing door has guide fittings attached to both ends in the sliding direction and inclination preventing means, and the guide fittings are located below and to the side of the opening. The tilt prevention means has rollers that are in contact with the front side groove portions of the liner plate, and are held by the lateral flanges of the liner plate. Vertical shaft protection wall. 2. A slidable opening / closing door for covering an open portion provided on a part of a peripheral surface of an upper end portion of the vertical shaft protection wall formed of a liner plate attached along the vertical shaft wall and projecting above the surface of the vertical shaft is guided. An opening / closing door guide fitting, the guide fitting including a plate attached to the opening / closing door, and a roller rotatably disposed on a lower surface of the plate and rolling on an upper surface of a lateral flange of the liner plate, An opening / closing door guide metal fitting for a vertical shaft protection wall, comprising: a pair of guide rods that are vertically provided on the lower surface of the plate and that are located on both sides of the horizontal flange.