JP2587480Y2 - Fall prevention device for evacuation hatch - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention device for an escape hatch with improved safety of the escape hatch.

[0002]

2. Description of the Related Art A general evacuation hatch installed on a veranda or the like of an apartment house has a ladder extending to a lower floor folded and stored in a frame installed at an opening provided in a slab.
The upper and lower openings of the frame are closed by an upper lid and a lower lid pivotally attached to the frame.

The frame is further provided with an opening mechanism for opening the upper and lower lids by operating from the lower floor. In an emergency, a fire brigade or the like operates the opening mechanism to open the upper and lower lids. After that, the ladder folded inside the frame is extended to the lower floor to secure an evacuation route.

[0004]

However, in the conventional evacuation hatch, since the upper lid can be easily opened from the upper floor side, it is conceivable that a child or the like may open the upper lid, and there is still a problem in safety. It had been.

The present invention has been made in consideration of this problem, and provides a fall prevention device for an evacuation hatch that can prevent the upper lid of the evacuation hatch from being opened from the upper floor side and can enhance safety. The purpose is to:

[0006]

In order to achieve the above object, a fall prevention device for an escape hatch according to the present invention includes a frame installed in an opening provided in a slab, and a frame folded in the frame. A ladder that is stored and expands and contracts toward the lower floor, an upper lid and a lower lid that close the upper and lower openings of the frame, and an opening mechanism that opens the upper lid and the lower lid by operating from the lower floor side. In the hatch, the opening machine
The structure is vertically rotated by an axis on the inner peripheral surface of the frame.
Arm to open the upper and lower lids
And is pivotally attached to one end of the arm and suspended downward,
A handle for operating the arm from the lower floor, and connecting the other end of the upper lid opening inhibiting member having one end locked to the upper lid to the lower floor.
When the release mechanism operated from
It is characterized in that it is locked by an engagement / disengagement mechanism that is unlocked by movement .

[0007]

In this way, when the upper lid is to be opened from the upper floor side, the opening of the upper lid is hindered by the tension of the upper lid opening inhibiting member, but the opening mechanism is operated by the operation of the puller from the lower floor side. When activated, the arm rotates
Accordingly , the engagement between the upper lid opening inhibiting member and the engagement / disengagement mechanism is released, and the upper lid is opened.

[0008]

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 perspective view of an evacuation hatch to which the present invention is applied, and FIG. 2 is a longitudinal sectional view of the evacuation hatch. The evacuation hatch 1 includes a frame 4 that is firmly fitted into an opening 3 provided in a slab 2, a ladder 5 that is folded and stored in the frame 4, and expands and contracts toward a lower floor. An upper cover 6 and a lower cover 7 pivotally attached to the frame 4 and closing the upper and lower openings 4a and 4b of the frame 4, an opening mechanism 8 for opening the upper cover 6 and the lower cover 7 by operating from the lower floor side; It has.

The ladder 5 has a structure in which, for example, a step 10 is fixed to both sides of a telescopic column 9, and a base end of the column 9 is rotatably mounted on a bracket 11 fixed to the frame 4. Being pivoted. When the ladder 5 is stored, the contracted ladder 5 is supported substantially horizontally in the frame 4 by a support mechanism (not shown).

The upper lid 6 and the lower lid 7 are linked by a link mechanism (not shown), and when the upper lid 6 is opened upward, the lower lid 7 opens downward at the same angle. Upper lid 6
And the lower lid 7 opens to an angle of about 90 ° with respect to the frame 4. Although FIGS. 1 and 2 show the upper lid 6 and the lower lid 7 in a half-open state for easy understanding of the drawings, the upper lid 6 and the lower lid 7 are in close contact with the frame 4 in normal times.

The opening mechanism 8 includes, for example, a substantially Z-shaped arm 14 rotatably supported by a shaft 13 on the inner peripheral surface of the frame 4 corresponding to the free ends of the upper lid 6 and the lower lid 7. Roller 15 rotatably supported at one end of arm 14
And a tab 16 pivotally attached to the other end of the arm 14. The tab 16 hangs downward through a notch 7 a provided in the lower cover 7.

When using the evacuation hatch 1 in an emergency, when a firefighter or the like pulls the handle 16 downward with a hook bar or the like, the arm 14 rotates about the shaft 13 and the roller 15 pushes the upper lid 6. open. When the upper lid 6 is pushed open to a certain extent by the roller 15, it is completely opened to the position shown in FIG. 3 by the urging force of the link mechanism, and the lower lid 7 is also opened in conjunction with the upper lid 6. The ladder 5 is automatically extended to the lower floor by opening the upper lid 6 and the lower lid 7, or extended by operating another pulling handle or the like.

Next, a fall prevention device for an escape hatch according to the present invention will be described. In this embodiment, the fall prevention device 18 for an evacuation hatch includes a hook 19 fixed to the lower surface of the upper cover 6 near the free end, an engagement / disengagement mechanism 20, and a chain 21 serving as an upper cover opening restraining member. . One end of the chain 21 is locked by the hook 19, and the other end is connected to the engagement / disengagement mechanism 20.

The engagement / disengagement mechanism 20 includes, for example, a locking member 22 fixed to the inner peripheral surface of the frame 4 and a clip 23 attached to the arm 14. The locking member 22 has a hole 22a. The clip 23 has a striker 23a
Is provided.

As shown in FIGS. 1 and 4 (a), when the release mechanism 8 is not operating (when the arm 14 is not rotating), the striker 23a is engaged with the hole 22a of the locking member 22. The end of the chain 21 is locked to the striker 23a. For this reason, even if it tries to open the upper lid 6 from the upper floor side, the opening of the upper lid 6 is suppressed by the tension of the chain 21.

Then, as shown in FIG. 4B, when the release mechanism 8 is operated (the arm 14 is rotated), the striker 23
Since the upper lid 6 is pivoted upward and the chain 21 is pulled at the same time when a is pulled out from the hole 22a, the engagement between the chain 21 and the striker 23a is released, and the upper lid 6 is opened smoothly.

With the above configuration, the evacuation hatch 1
The upper lid 6 is not easily opened by a child or the like, and safety is remarkably improved. In addition, by setting the strength of the hook 19 provided on the upper lid 6 to such a degree that the upper lid 6 is deformed when the upper lid 6 is strongly pulled up by an adult, the evacuation hatch can be opened by opening the upper lid 6 from the upper floor side at any discretion. 1 may be used.

The upper lid opening inhibiting member is not limited to the chain 21, but may be a wire or a rope.

[0019]

[Effects of the Invention] As described above, the fall prevention device for an evacuation hatch according to the present invention includes an opening mechanism on the inner peripheral surface of the frame.
The shaft is rotatably supported in the vertical direction by a shaft,
An arm that opens the lower lid, and a pivot
With a handle that operates the arm from the lower floor
Ah constitutes the other end of the upper lid open inhibiting member having one end engaged with the upper lid, upon actuation of the release mechanism to be operated from the lower floor from
When the upper lid is opened from the upper floor side, the opening of the upper lid is hindered by the tension of the upper lid opening suppressing member, and the lower floor side is locked. When the opening mechanism is actuated by the operation of the puller from, the engagement between the upper lid opening inhibiting member and the engagement / disengagement mechanism is released by the rotation of the arm, and the upper lid is opened.

Therefore, the upper lid of the evacuation hatch is not easily opened by a child or the like, and the safety is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an evacuation hatch to which the present invention is applied.

FIG. 2 is a longitudinal sectional view of the evacuation hatch.

FIG. 3 is a side view showing a use state of the evacuation hatch.

FIG. 4A is a perspective view showing a state of an engaging and disengaging mechanism when an opening mechanism is not operating. (B) is a perspective view showing the state of the engagement / disengagement mechanism when the opening mechanism operates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Evacuation hatch 2 Slab 3 Opening 4 Frame 4a Upper opening 4b Lower opening 5 Ladder 6 Upper lid 7 Lower lid 8 Opening mechanism 13 Axis 14 Arm 15 Roller 16 Puller 18 Fall prevention device for evacuation hatch 19 Hook 20 Disengagement mechanism 21 Chain serving as upper lid opening suppressing member 22 Locking member 22a hole 23 clip 23a striker

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) A62B 5/00 E06C 9/14

Claims (1)

(57) [Scope of request for utility model registration] 1. A frame installed in an opening provided in a slab, a ladder folded and stored in the frame, and extended and contracted toward a lower floor, and an upper lid closing an upper and lower opening of the frame. And an evacuation hatch provided with a lower lid and an opening mechanism for opening the upper lid and the lower lid by operation from the lower floor side, wherein the opening mechanism is provided on the inner peripheral surface of the frame by a shaft.
The upper and lower lids are opened to pivot freely
Arm to be pivoted to one end of the arm
It is hung from the lower floor with a puller that operates the arm.
When the opening mechanism operated from the lower floor is operated , the other end of the upper lid opening inhibiting member, one end of which is locked to the upper lid, is connected to the upper lid.
A fall prevention device for an escape hatch, wherein the fall prevention device is locked by an engagement / disengagement mechanism that is released by rotation of the arm .