JPH0332661Y2 - - Google Patents

Description

[Detailed explanation of the idea] 【Technical field】

The present invention relates to a folding type ladder unit for emergency use or ceiling lift, and relates to a technique for positioning and supporting the link body at a predetermined angle when the ladder is lowered.

[Background technology]

Conventionally, as shown in FIG. 5, a hook-shaped link receiving part 10 is fixed to the inner peripheral side of the opening frame with screws 11, and when the lid plate is opened and the link body 4 is lowered, This link receiving portion 10 was designed to receive the base of the link body 4. However, the height at which this ladder unit is installed differs depending on the installation location, and the length of the ladder is fixed, so in places where the gap between the ceiling and the floor is high, the angle of the lowered ladder part will be steep, making it difficult to connect to the ceiling. If the alcove is low, the angle of the ladder will be gentler,
In the conventional example described above, even if the angle of the ladder changes, the angle at which the link body 4 is supported by the link receiving portion 10 cannot be adjusted.

[Purpose of invention]

The present invention was developed in view of the above-mentioned technical background, and its purpose is to be able to adjust the positioning angle of the link body depending on the location where the ladder unit is installed, and to ensure that the To enable a link body to be supported by a link receiving part.

[Disclosure of invention]

In the ladder unit of the present invention, one end of a cover plate 3 having a foldable ladder 2 attached to its upper surface is rotatably attached to the lower part of one end of an opening frame 1, and a link body 4 is connected with a pair of links 8. One end of the opening frame 1
The other end of the link body 4 is rotatably connected to the side surface of the opening frame 1, and the stopper block 6 is rotatably connected to the side surface of the opening frame 1 using screws 5 such as bolts or screws. It is attached so that the upper and lower backing can be changed freely, and the link body 4 when lowering is attached to the side of the stopper block 6.
A plurality of abutting parts 7a, 7c, etc. are provided for abutting and positioning the stopper block 6, and the inclination angles of the abutting parts 7a, 7c of the stopper block 6 are made different, and the link body can be adjusted by replacing the stopper block 6. The present invention is characterized in that the positioning angle of No. 4 can be changed, thereby achieving the above object. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Figure 5 shows a situation where a ladder unit is installed on the ceiling so that the space above the ceiling can be used. There is an opening 1 in the ceiling 12 that is large enough for a person to pass through.
3 is opened, and a metal opening frame 1 is fixed to the inner periphery of this opening 13. This opening frame 1
One end of the cover plate 3 is rotatably hinged to the lower part of the one end by a hinge 14. In the illustrated example, the foldable ladder 2 is designed to be folded into three parts, and the top part is fixed to the upper surface of the cover plate 3. The ladder 2 can be folded onto the top surface of the cover plate 3 when stored. Link body 4 is 2
It is a link 8 of a book rotatably connected,
The upper end of the link body 4 is rotatably attached to a holding fitting 15 attached to the side surface of the opening frame 1.
The lower end of the link body 4 is rotatably attached to the side of the upper surface of the cover plate 3. Further, a tension spring 16 is stretched between the opening frame 1 and the lower part of the link body 4, and is biased in the pulling direction so that the cover plate 3 can be easily closed. The holding fitting 12 also has a link body 4.
A stopper block 6 for positioning can be attached with two screws 5 such as bolts or screws so that the upper and lower supports can be changed. The stopper block 6 is a metal plate having a shape as shown in FIG. 3, and has contact portions 7a and 7c each having two different inclination angles (with respect to the straight line connecting the hole 9 for driving the screw 5). There is. Therefore, when the cover plate 3 is closed, the link body 4
is folded in two, and when the cover plate 3 is opened, the link body 4 is opened.
When the link body 4 is lowered, the link body 4 comes into contact with either of the contact portions 7a, 7c of the stopper block 6, is supported, and is positioned. Here, the link body 4 has contact portions 7a, 7 when the ladder 2 is placed on the floor 17.
The stopper block 6 is adjusted so that it is supported and positioned by one of the above-mentioned methods, and this adjustment can be done by turning the stopper block 6 upside down and replacing it, or by replacing the front and back supports, as shown in Figures 1 and 2. be. That is, what is shown in FIG. 1 is a state where the link body 4 is positioned at the steepest angle, and what is shown in FIG. 2 is a state where the link body 4 is positioned at a gentler angle. Link body 4 shown in imaginary lines in Figures 1 and 2
The rotating state of the figure is shown, and the rotation locus of the connected portion is shown by the dashed line.

[Effect of the idea]

Since the present invention is constructed as described above, by flipping the stopper block upside down or flipping it upside down and replacing it, the abutment part that hits the link body can be changed, and the angle at which the link body hits the abutment part can be adjusted. This has the advantage that the link receiving portion can be adjusted depending on the installation location of the ladder unit to reliably support and position the link body.

[Brief explanation of drawings]

Figures 1 and 2 are front views showing one embodiment of the present invention, each showing different adjustment states. Figure 3 is a front view of the stopper block, and Figure 4 is a perspective view showing the opening frame and cover plate. 5 is an overall perspective view of the ladder unit, and FIG. 6 is a perspective view of a conventional example, in which 1 is an opening frame, 2 is a ladder, 3 is a cover plate, 4 is a link body, and 5 is a perspective view of a conventional ladder unit.
is a screw tool, 6 is a stopper block, 7a, 7c
is a contact portion, and 8 is a link.

Claims (1)

[Scope of utility model registration request] One end of the cover plate, which has a foldable ladder attached to its upper surface, is rotatably attached to the bottom of one end of the opening frame, and one end of the link body, which connects a pair of links, is rotatably attached to the side of the opening frame. At the same time, the other end of the link body is rotatably attached to the cover plate, and the stopper block is attached to the side of the opening frame with screws such as bolts and screws so that the upper and lower sides can be changed freely. A plurality of abutting parts are provided on the side surface of the link body for positioning the link body during descent, and the inclination angles of the abutting parts of the stopper block are made different. A ladder unit that allows the positioning angle to be changed.