JPH10227134A - Protective flame body for opening in lining board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a protective frame body with a high strength which can be easily handled for assembly, transportation, and storage by making one side of a frame body freely foldable, which has handrail portions freely slidable and fixable at both sides. SOLUTION: At both the sides 3a, 3b of a frame main body 3 constituted to a predetermined height with an L-shaped plan, handrail members 4 having coupling and linking portions 10, 10 at the tip are respectively provided in a freely slidable and fixing manner, then, a proper position of the side 3a of the frame main body 3 is constituted in a freely folding manner almost in parallel with other side 3b. Desirably, the handrail member 4 should also be made freely foldable. By doing this, a protective fence can be installed easily around the opening of the lining boards 1, 1. Also, this protective frame body has an excellent strength and a high safety so that its transport, storage and other handling can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective frame used for an opening of a lining plate laid on the ground surface in underground construction or the like.

[0002]

2. Description of the Related Art Conventionally, an excavation or the like creates an underground work space at an underground construction site or the like. Therefore, the underground work space is covered with a lining plate, and a part necessary for entry and exit of the worker is opened, and a protective fence is installed around the opening.

Conventionally, the protective fence is provided with uprights using, for example, hanging holes formed at four corners of a lining plate located around the opening, and a round pipe is formed between the supports by a clamp. It was configured with a handrail attached.

[0004]

The conventional protective fence is
Assembling and disassembling, e.g., erecting a plurality of columns, attaching handrails between the columns, and the like, required a lot of trouble, and there was still a problem in terms of strength as a protective fence.

The present invention has been made in view of the above circumstances, and provides a protective frame for an opening of a lining plate which is easy to handle in assembling, transporting, storing, and the like, and has excellent strength. With the goal.

[0006]

In order to solve the above-mentioned problems, the present invention provides a handrail member having a connection engaging portion at a tip on both sides of a frame main body having a flat L-shape and a predetermined height. The frame body is provided so as to be slidable and fixable, and a suitable position of one side of the frame body is foldable substantially in parallel with the other side, and preferably, the handrail member is foldable.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a use state diagram in which a protective frame for a lining plate opening according to the present invention is combined, and FIG. 2 is a perspective view showing an embodiment of a protective frame for a lining plate opening according to the present invention. 3 is a perspective view of a main part showing an example of a folding structure of the frame main body, FIG. 4 is a perspective view of a main part showing a folded state of the frame main body, and FIG. 5 is a partially omitted main part perspective showing an example of a foldable portion of the handrail member. FIG. 6 and FIG. 6 are perspective views of a main part showing a folded state of the handrail member, and FIG. 7 is a perspective view showing a folded state of the handrail member.

FIG. 1 shows an example of a protective fence S constituted by combining a protective frame A for a lining plate opening according to the present invention. That is, at each of the four corners of the opening 2 of the lining plate 1 that covers an underground working space generated by excavation or the like at a work site such as an underground work, the protective frame A for lining plate opening according to the present invention (hereinafter simply referred to as “ Protective frame A "). Since the protective frames A at the four corners have the same configuration, one of them will be described in detail below.

The protective frame A of the present invention comprises a frame main body 3 and a handrail member 4, and as shown in FIGS. 2 to 4, a predetermined L-shaped plane is formed by using an angle material or the like. Each of the sides 3a, 3b is framed by an upper bar 5, an intermediate bar 6, a lower bar 7, and a vertical bar 8, respectively.

Further, according to the present invention, square pipes of a predetermined length are fixed along the outer side surfaces of the upper and lower rails 5 and 6, respectively, so that the handrail member 4 to be described later can be slid and fixed freely (hereinafter simply referred to as 9). This is referred to as a “fixable portion 9”). An appropriate number (two or one in FIG. 2) of through-holes 9a are provided on the upper surface of the fixable portion 9 at predetermined intervals, and a rear end 4a of the handrail member 4 is provided. It is slidably and freely inserted.

In the embodiment shown in FIGS. 2, 5 to 7, the handrail member 4 is constituted by connecting and folding three square pipes each having a predetermined length.

Next, the sliding and fixing structure of the handrail member 4 will be described. First, on the upper surface of the rear end portion 4a of the handrail member 4, an appropriate number of engagement holes 4b that fit into the through holes 9a of the fixable portion 9 of the frame body 3 are formed at predetermined intervals. Next, the rear end portion 4a of the handrail member 4 is inserted into the fixable portion 9 of the frame body 3 and slid to a required predetermined position so that the through hole 9a of the fixable portion 9 of the frame body 3 After the engagement hole 4b of the handrail member 4 is adjusted, if the fixing pin 30 is inserted from above, the handrail member 4 can be fixed at a predetermined position.

Further, a connecting engagement portion 10 is formed at the tip of the handrail member 4. The connection engaging portion 10 is inserted into the fixing portion 9 of the frame body 3 of the facing protection frame A so as to be slidable and fixable. Actually, the rear end portion 4a of the handrail member 4 is provided. The configuration is the same, and has an appropriate number of engagement holes 10a.

That is, by providing an appropriate number of engagement holes 4b at the rear end 4a of the handrail member 4 and providing an appropriate number of engagement holes 10a serving as the connection engagement portions 10 at the front end,
Protective fence S adapted to opening 2 of lining plate 1 of different size
Can be installed.

Further, in the present invention, a suitable position of one side 3a of the frame body 3 is configured to be foldable substantially parallel to the other side 3b. That is, in the present invention, as shown in FIGS. 2 to 4, an appropriate position of one side 3 a of the frame main body 3, as much as possible near the other side 3 b, is divided substantially parallel to the vertical bar 8,
The connecting bars 11 are attached to the divided portions by welding, and the two connecting bars 11 are connected by hinges 12, and as shown in FIGS.
The divided side of one side 3a is configured to be foldable substantially parallel to the other side 3b.

Furthermore, the divided front end of one side 3a of the frame body 3 is configured not to be naturally folded when used as the protective fence S.

That is, as shown in FIG. 3 and FIG. 4, opposing portions of the connecting bar 11, in the illustrated embodiment, opposing portions at the same positions as the upper bar 5, the intermediate bar 6, and the lower bar 7. Are provided with brackets 13 respectively, and each of the brackets 13 and the connecting bar 1
1, each through-hole 14 is formed, and a horizontal bar 15 (so-called bar) is inserted between the opposed through-holes 14 so that the through-hole 14 is not naturally folded. In the drawing, reference numeral 16 denotes a chain for preventing the horizontal bar 15 from being lost.

Next, the folding structure of the handrail member 4 will be described. In the present invention, preferably, the handrail member 4 is configured to be foldable to facilitate storage, transportation, and the like. For example, as shown in FIGS. 2, 5 to 7, three square pipes 4d, 4e, 4
f are connected, and the connecting portion is configured to be foldable.

That is, a U-shaped bracket 17 having an outside opening is welded to the front end of the square pipe 4d, and the rear end of the square pipe 4e is positioned in the U-shaped bracket 17 so that the square pipe 4d is positioned. An outer surface of a front end of the square pipe 4e and a rear end of the square pipe 4e are connected to each other by a hinge 18 so as to be foldable outward. At the same time, the through hole 1
9. An engagement hole 20 is formed at the rear end of the square pipe 4e.
When 1 is inserted, the linear state is maintained.

Further, the connecting portion between the square pipes 4e and 4f is configured to be foldable in the same configuration. The folding direction of the connecting portion is opposite to the folding direction of the square pipes 4d and 4e.

That is, a U-shaped bracket 17a having an inside opening is welded to the tip of the square pipe 4e, and the rear end of the square pipe 4f is positioned in the U-shaped bracket 17a. The inner surface of the front end of 4e and the inner surface of the rear end of the square pipe 4f are foldably connected inward by hinges 18a. In the figure, reference numeral 19a denotes a through-hole provided at the tip of the U-shaped bracket 17a, reference numeral 20a denotes an engagement hole provided at the rear end of the square pipe 4f, and reference numeral 31a denotes a pin.

According to the above construction, the handrail member 4 can be folded to approximately one-third the length as required, and one handrail is inserted by linearly inserting the pins 31 and 31a. Used as the member 4.

When the connecting surfaces of the connecting portions of the square pipes 4d, 4e, 4f are opposed to each other at a 45-degree angle, the resistance to the bending force applied from the horizontal direction is strengthened, and the safety is improved.

In the drawing, reference numeral 21 denotes a caster mounted on a proper position on the bottom surface of the lower beam 7 of the frame main body 3, and reference numeral 22 denotes a baseboard. The protection fence S is fitted over the entire circumference of the protective fence S and prevents, for example, pebbles or nails from falling into the opening 2.

Reference numeral 24 denotes a fixture for fixing the protective frame A of the present invention to the lining plate 1 around the opening 2. In the embodiment shown in the drawings, a square screw having an appropriate length is used. 25
Is inserted through a support piece 26 attached to the inside of the upper step 4 and the intermediate step 6 of the other side 3b of the frame body 3, and the nut 24a screwed to the upper part is rotated by the handle 24b to thereby form the square torsion. 25 is raised, and a hook 24d provided at the lower end via a chain 24c can be pulled up.

Accordingly, when the hook 24d is engaged with the hanging hole 1a of the lining plate 1 and the handle 24b is operated to raise the square screw 25, the chain 24c is tensioned, Hook 24d is the hanging hole 1
a of the protective frame A of the present invention
It can be fixed to the part.

As shown in FIG. 1, the protective frame A for an opening of a lining plate of the present invention having the above-mentioned structure is arranged at the four corners of the opening 2 and is connected by a handrail member 4 therebetween. The frame body 3 and the handrail member 4 are easily foldable, so that handling such as transportation and storage is easy, and workability is improved. Further, since the whole is integrally connected, the strength is excellent and the safety is improved.

[0028]

According to the present invention, a protective fence can be installed around an opening of a lining plate laid on the ground surface in an underground construction work without any trouble, and the transportation fence, storage and the like can be installed. It is easy to handle, has excellent strength, and improves safety.

[Brief description of the drawings]

FIG. 1 is a view showing a use state in which a protective frame for an opening of a lining plate according to the present invention is combined.

FIG. 2 is a perspective view showing an embodiment of a protective frame for a lining plate opening according to the present invention.

FIG. 3 is a perspective view of an essential part showing an example of a folding structure of a frame main body.

FIG. 4 is a perspective view of a main part showing a folded state of the frame main body.

FIG. 5 is a partially omitted perspective view showing an example of a foldable portion of a handrail member.

FIG. 6 is a partially omitted main part perspective view showing a folded state of the handrail member.

FIG. 7 is a perspective view showing a folded state of a handrail member.

[Explanation of symbols]

 S Protective fence A Protective frame 1 Lining plate 2 Opening 3 Frame body 3a One side 3b Other side 4 Handrail member 9 Freely fixing part 10 Connection engaging part

Claims (2)

[Claims] 1. On both sides 3a, 3b of a frame main body 3 formed at a predetermined height in a plane L-shape, a handrail member 4 having a coupling engaging portion 10 at its tip is provided slidably and freely, respectively. A protective frame for an opening of a lining plate, wherein an appropriate position of one side 3a of the frame body 3 is configured to be foldable substantially in parallel with the other side 3b. 2. The protective frame for a lining plate opening according to claim 1, wherein the handrail member 4 is configured to be foldable.