JPH11152944A - Fall prevention fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a person from falling from an opening part into the underground by providing a fixing device attached to the inside of the opening part of a floor leading to an underfloor room, slid upward to be lifted on the floor and maintained the state lifted on the floor. SOLUTION: At the time when an underground room is utilized, a cover B is double-leaf hinged opening and sprung up in the form of a hatch upward. An opening part C is a square manhole and a ladder D getting down to the underground is attached to one face of an inner periphery. A fall prevention fence is attached along the inner periphery of the opening part C, when an upper part is pulled, it is slid to go up above the floor, and fixed at the position. A fixing plate 1 supporting the fall prevention fence is fixed on both the sides of a face attaching the ladder D of the inner periphery of the opening part C, and the column is connected by three U-shaped horizontal muntins 3. An invasion prevention cover 4 is mounted so as not to be invaded from the opening part of the side of the ladder D of the uppermost horizontal muntin 3. Thus, a person can be protected from falling in the underground room from the opening part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention fence that surrounds an opening of a floor leading to a basement or the like so as to prevent others from falling down.

[0002]

2. Description of the Related Art A basement is sometimes used as an equipment room such as a power supply, a warehouse, a shelter, and the like. In such a case,
Because we do not usually use the basement much, we do not set up the normal stairs leading to the basement due to space considerations, but provide an opening to the basement on a part of the floor and install a ladder for elevating vertically inside the opening. Be prepared and have access to the basement by getting off the ladder.

[0003] Usually, the floor opening is covered with a lid,
Walking on it will not fall into the basement. On the other hand, while entering or leaving the basement for work, the lid is removed like a manhole cover,
It is jumped up like a hatch. By using a foldable safety fence, the area around the opening is surrounded, and pylons and poles are lined around the opening and ropes are used to prevent accidental falls from the opening.

[0004] It takes time and effort to carry and install a foldable safety fence or a pole every time the basement is used. In addition, since these are made lightweight to make them easy to carry, it is possible that a person who looks aside and walks violently collides with it and may fall down or move. Was difficult to completely prevent.

[0005]

Therefore, there is a need for a device that can effectively prevent a person from falling into the basement through an opening provided on the floor and that can be easily set.

[0006]

According to the present invention, a fall prevention fence is provided.
A fixing device (5) attached to the inside of the opening (C) of the floor (A) leading to the room under the floor, which can be slid upward and lifted up on the floor, and maintain the state of being pulled up on the floor , (7).

[0007] According to this, it is possible to arrange the fence around the opening simply by pulling up the fall prevention fence housed inside the opening on the floor and fixing it.

Further, even if a pedestrian or the like collides with the fall prevention fence, since the fall prevention fence is attached to the opening, it does not move from a position above the opening to another place. A person can push the fall prevention fence so that it does not fall into the opening.

According to a second aspect of the present invention, there is provided the fall prevention fence according to the first aspect, wherein the fixing device raises the fall prevention fence once above a fixed position on the floor and then lowers the fall prevention fence. Thus, the fixing state is established, and the fixing state is released by lowering after being pulled up above the fixing position again.

According to this, when the fall prevention fence is pulled out on the floor and used or stored in the opening, the fixing by the fixing device and its release can be performed only by the lifting operation of the fall prevention fence. Therefore, handling becomes easy.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to preferred embodiments. [Example] The floor (A) is provided with an opening (C) for entering a basement. In this embodiment, the opening is a square (C). Normally, the opening (C) is closed with a lid (B), and even if the vehicle passes over the lid (B), the opening (C) does not fall into the basement.

When using the basement, the lid (B) is flipped up in a hatch-shape with double doors. Since the floor (A) has a thickness, the opening (C) has a depth in the vertical direction, and is like a square manhole. A ladder (D) for descending to the basement is attached to one surface of the inner periphery of the opening (C).

The fall prevention fence is mounted along the inner periphery of the opening (C). Therefore, there is no need to carry safety fences or poles from other places such as warehouses.

In use, when the user pulls up the upper part of the fall prevention fence, the slide prevention fence slides up to the floor and is fixed at that position. FIG. 1 is a perspective view showing a state in which the fall prevention fence of the present invention is pulled up and fixed,
FIG. 2 is a diagram showing this state viewed from the ladder (D) side.

(1) is a fixing plate for supporting the fall prevention fence, which is fixed to both sides of the surface on which the ladder (D) on the inner periphery of the opening (C) is attached. (2) is four pillars, pillar (2)
Are connected by three "U-shaped" crosspieces (3). The cross rail (3) is attached so that the opening side is on the ladder (D) side.

An intrusion prevention bar (4) is attached on the ladder (D) side of the uppermost horizontal rail (3), that is, on the opening side so as not to enter the opening from the ladder (D) side. One end of the intrusion prevention bar (4) is pivotally mounted and the other end is detachable, so that the bar can be rotated about the pivoted side. Therefore, when the worker enters the opening (C), the worker may dive under the intrusion prevention bar (4), but once the one end of the intrusion prevention bar (4) is removed, the intrusion prevention bar (4) is removed. Enter the opening (C) out of the way, then re-enter the bar.
(4) may be set.

Reference numeral (6) denotes a guide roller attached to the fixing plate (1), which is in contact with a groove provided on the side surface of the column (2), and serves as a guide for vertical sliding and resistance of sliding. It plays a role in reducing it.

(5) is a stopper for fixing the fall prevention fence raised on the floor in a raised state,
It is attached to a stopper attachment part (8) attached to the lower part of the pillar (2). (7) is a support member attached to the fixing plate (1), and engages with the stopper (5) to fix the position of the fall prevention fence.

The fixing of the fall prevention fence by the stopper part (5) and the support member (7) is the same system as the fixing mechanism of the general slide type ladder, and the stopper part (5) is located above the support member (7). When the fall prevention fence is lifted up until it is positioned at, and the fall prevention fence is slightly lowered, the stopper (5) and the support member (7) automatically engage, and the fall prevention fence cannot move further downward. I do. Then, once the fall prevention fence is lifted and lowered from its fixed position,
The fall prevention fence is lowered to the storage position (under the floor) without the engagement of the support member (5) with the support member (5).

FIG. 3 is a view showing a fixing means of the fall prevention fence, and FIGS. 4 to 13 are views for explaining the fixing of the fall prevention fence by the stopper portion (5) and the support member (7). is there. The stopper portion (5) includes a locking portion (5a) having a bifurcated claw portion, and a rotating fitting (5b) pivotally mounted on one of the claw portions of the locking portion (5a).

The locking portion (5a) is rotatable within a certain range around a shaft (5c) attached to the stopper mounting portion (8) of the fixed plate (1), but is attached to the mounting shaft (5c). The spring (5d) is pushed to the left in the figure.

In use, when the fall prevention fence is pulled up as shown in FIG. 4, the locking portion (5a) comes into contact with the support member (7). Further, as shown in FIG. 5, the locking portion (5a) is pressed by the support member (7) and moves rightward against the spring (5d).

When the fall prevention fence is further pulled up and the toe of the locking portion (5a) moves above the support member (7), it is no longer pushed by the support member (7). It is pushed by (5d) and moves to the left as shown in FIG.

When the fall prevention fence is slightly lowered in this state, FIG.
As shown in (5), the support member (7) is engaged with the crotch between the two claws of the locking portion (5a). This allows the fall prevention fence to be a support member
It is supported by (7) and is maintained in a state of being raised on the floor.

When storing the fall prevention fence in the opening after use, the fall prevention fence is once pulled up. Then
As shown in FIG. 8, the support member (7) comes into contact with the upper surface of the rotating bracket (5b), and when further raised, the rotating bracket (5b) is pushed by the supporting member (7) as shown in FIG. It rotates counterclockwise in the figure with respect to the locking portion (5a).

When the support member (7) is further pulled up, the support member (7) comes off the tip of the rotating bracket (5b) as shown in FIG.
The position of the rotating metal fitting (5b) positioned above (7) with respect to the locking portion (5a) returns to the normal position.

Next, when the fall prevention fence is lowered, FIG.
As shown in (2), the support member (7) comes into contact with the lower surface of the rotary fitting (5b), and the rotary fitting (5b) rotates clockwise in the drawing. As it is further lowered, the rotating bracket (5b) rotates further, and as shown in FIG.
As shown in (5), the distal end abuts on the locking portion (5a). As a result, the space between the claws of the locking portion (5a) is closed by the rotating bracket (5b), so that the support member (7) does not fit into the crotch portion of the locking portion (5a). When further lowered, the entire stopper portion (5) moves below the support member (7) as shown in FIG.
If you go down after that, the fall prevention fence will be stored inside the opening. The guide roller (6) is in contact with the upper end of the groove of the pillar (2) so that the fall prevention fence does not fall downstairs.

[0028]

As described above, according to the present invention, there is provided a fall prevention means which can effectively prevent a person from falling underground through an opening provided on a floor and which can be easily set. Was completed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a fall prevention fence of an embodiment is pulled up and fixed.

FIG. 2 is a view of a state in which a fall prevention fence of the embodiment is pulled up and fixed, as viewed from a ladder side.

FIG. 3 is a view showing fixing means of the fall prevention fence of the embodiment.

FIG. 4 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 5 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 6 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 7 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 8 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 9 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 10 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 11 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 12 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

FIG. 13 is a diagram illustrating fixing means of the fall prevention fence according to the embodiment.

[Explanation of symbols]

 (1) Fixing plate (2) Column (3) Cross rail (4) Bar for preventing intrusion (5) Stopper section (6) Guide roller (7) Support member (A) Floor (B) Lid (C) Opening (D ) Ladder

Claims (2)

[Claims] Claims 1. A fixed device attached to the inside of an opening in a floor leading to a room under the floor, which can be slid upward and lifted on the floor, and which has a fixing device for maintaining the state of being lifted on the floor. Fall prevention fence that is the feature. 2. The fixing device is brought into a fixed state by pulling up the fall prevention fence once above the fixed position on the floor and then lowering it. The fixing device is released by lowering it after being pulled up again above the fixed position. The fall prevention fence according to claim 1, wherein the fall prevention fence is provided.