JPH0420066B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of a ceiling ladder unit in which the ladder unit is attached to an opening in the ceiling so as to be openable and closable in order to utilize a storage space provided in the ceiling. be.

[Background technology]

In order to utilize the space above the ceiling as a storage area, a ladder unit 10 as shown in FIG. 1 is attached to an opening 2 in a ceiling 1. 5 in the diagram is 3
This is a folding ladder with steps. 4 is a cover plate on which the ladder 5 is placed on the top and stored in the attic, 3 is a frame plate fixed to the periphery of the opening 2 in the ceiling, and 6 is a frame plate 3 that connects the cover plate 4 to the frame plate 3. A pivot point is pivotally connected to the lower end so as to be vertically movable, 11 is a tension spring, 12 is an opening/closing link, 13 is a ladder mounting seat for attaching the ladder 5 to the lid body 4, and 14 is a safety lock and a punch lock. In this case, when using the storage space in the attic, open the cover plate 4, take out the ladder 5, extend the ladder 5 as shown in the figure, place it on the floor, and climb up the top of the ladder 5. The lid plate 4 is kept closed when the storage section is not used. However, in this ladder unit 10, the cover plate 4 is attached to the ceiling by the tension spring 11 so that the cover plate 4 can be easily opened and closed.
Even when the ladder 5 is extended, the tension spring 11 is pulling the ladder 5 upward, so if the spring force of the tension spring 11 is strong, the ladder 5 may float up. It was dangerous.

[Purpose of the invention]

The present invention has been made in view of the above points, and it is easy to open and close the lid plate attached to the opening in the ceiling so as to be able to move up and down, and the ladder does not float when the ladder is lowered. The purpose of this invention is to provide a structure for a ceiling ladder unit that will never cause problems.

[Disclosure of the invention]

That is, in the present invention, a frame plate 3 is attached to the periphery of an opening 2 provided in a ceiling 1, and a cover plate 4 is pivotally movable up and down at the lower end of one end of the frame plate 3, so that the cover plate 4 closes the opening in the ceiling 1. A folding ladder 5 is mounted on the upper surface of the lid plate 4, and a support fitting 7 is provided protruding from the upper surface of the end of the lid plate 4 on the side of the pivot portion 6. A fixing metal fitting 8 is fixed to the end opposite to the mounting part 6, and a compression spring 9 is installed between the upper part of the supporting metal fitting 7 and the fixing metal fitting 8, and both ends of the compression spring 9 are attached to the supporting metal fitting 7 and the fixing metal fitting 8. The above object has been achieved by the structure of the ceiling ladder unit, each of which is pivotally connected so as to be vertically movable.

The present invention will be explained in detail below with reference to Examples. As shown in FIGS. 2 and 3, the frame plate 3 is formed into a rectangular frame shape with an open top and bottom, and is inserted into an opening 2 provided in the ceiling 1. A cover plate 4 is pivoted to the lower end of one end of the frame plate 3 at a hinge 16 so as to be able to move up and down, and by moving the cover plate 4 up and down, the opening 2 in the ceiling 1 can be opened and closed. It is something that can be done. A folding ladder 5 similar to that shown in FIG. Figures 4 to 6
As shown in the figure, a pair of vertically elongated support fittings 7, 7 are provided on the upper surface of the end of the cover plate 4 on the side of the pivot portion 6, projecting upwardly on both left and right sides. Further, a fixing metal fitting 8 is fixed to the inner surface of the end of the frame plate 3 opposite to the pivoting part 6, and this fixing metal fitting 8 has a vertically long fixing groove 1.
8 is formed. The compression spring 9 is formed of a so-called air spring or the like, and is formed by inserting rods 19, 19 into both ends of a cylinder 17 so as to be able to protrude and retract. The compression spring 9 is installed between the upper part of the support metal fitting 7 and the fixing metal fitting 8, and as shown in FIG. By being fixed in the fixing groove 18 of the metal fitting 8 with fixing bolts 21, both ends of the compression spring 9 are pivotally connected to the supporting metal fitting 7 and the fixing metal fitting 8 so as to be vertically movable. Here, the pivoting position of the support fitting 7 and the compression spring 9 is a line connecting the pivoting position of the fixing fitting 8 and the compression spring 9 and the pivoting part 6 of the cover plate 4 when the cover plate 4 is closed. 1, and when the cover plate 4 is closed as shown in FIG. Moreover, when the cover plate 4 is opened from FIG. 4 to rotate downward. Further, as shown in FIGS. 4 to 6, the rotating shaft 20 attached to one rod 19 of the compression spring 9 is inserted into the groove 18 of the fixing bracket 8 so as to be slidable up and down, and can be positioned up and down as appropriate. After adjusting, the vertical position of the rod 19 can be adjusted by tightening the fixing bolt 21.

When using the storage space in the attic, the lid plate 4 is rotated up and down to open the opening 2 in the ceiling 1, and the ladder 5 on the top of the lid plate 4 is lowered and the lower end of the ladder 5 is placed on the floor. However, at this time, since the biasing direction of the compression spring 9 is downward, a pressure force is applied to the ladder 5 toward the floor, and the ladder 5 will not be lifted off the floor. It is. In addition, when closing the lid plate 4 into the opening 2 of the ceiling 1 after using the storage section,
After folding the ladder 5 and placing it on the upper surface of the cover plate 4, rotate the cover plate 4 up and down and securely fix the cover plate 4 to the ceiling 1 with the safety lock and punch lock 14 shown in FIG. It is something. Here, since the biasing force of the compression spring 9 is directed upward, the heavy ladder unit 10 can be opened and closed very easily. In addition, by forming the fixing metal fitting 8 vertically long and pivoting one end of the compression spring 9 to the fixing metal fitting 8 so that the vertical position can be freely adjusted, the compression spring 9 is able to resist the upward force acting on the cover plate 4 and the downward force. The force can be adjusted freely, for example, depending on the weight of the ceiling finishing material to be attached to the ceiling 1 and the lower surface of the cover plate 4. That is, when using a heavy gypsum board board as a ceiling finishing material, the compression biasing force of the compression spring 9 should be increased, and when using a light weight cloth etc. as a ceiling finishing material, the compression biasing force of the compression spring 9 should be increased. It reduces power. In the above embodiment, only one end of the compression spring 9 pivotally connected to the fixture 8 can be adjusted in the vertical position.
For example, as shown in FIGS. 7 to 9, a vertically long fixing groove 22 may be formed in the support fitting 7, and the pivoting position of the support fitting 7 may be adjusted vertically. Furthermore, the vertical position of the compression spring 9 may be adjusted using both the fixing metal fitting 8 and the supporting metal fitting 7.

〔Effect of the invention〕

As described above, the present invention supports both ends of the compression spring by installing the compression spring between the upper part of the support fitting protruding from the upper surface of one end of the cover plate and the fixing fitting fixed to the other end of the frame plate. Since the metal fittings and the fixed metal fittings are pivoted so that they can move up and down, when closing the lid plate to the ceiling opening, an upward force is applied to the lid plate to facilitate opening and closing operations, and when the lid plate is opened, the ladder can be placed on the floor. When lowered, it is safe because a downward force is applied to the lid plate to prevent the ladder from lifting up.

[Brief explanation of drawings]

Fig. 1 is an overall perspective view of the conventional example, Fig. 2 is a perspective view of a frame plate of an embodiment of the present invention, Figs. 3 a, b, and c are explanatory views of the same operation, and Fig. 4 is a perspective view of the same , FIG. 5 is a cross-sectional view of the same as above, FIG. 6 is a perspective view of essential parts of the same as above, FIG. 7 is a perspective view of another embodiment of same as above, FIG. 8 is a sectional view of same as above, and FIGS. 9 a and b These are an enlarged front view and an enlarged perspective view of the same as above. 1 is the ceiling, 2 is the opening, 3 is the frame board, 4 is the lid board, 5
A ladder, 6 is a pivot joint, 7 is a support metal fitting, 8 is a fixing metal fitting, and 9 is a compression spring.

Claims (1)

[Scope of Claims] 1. A frame plate is attached to the periphery of an opening provided in the ceiling, and a cover plate is pivoted to the lower end of one end of the frame plate so as to be movable up and down, so that the opening in the ceiling can be opened and closed with the cover plate, A folding ladder is mounted on the top surface of the lid plate, a support metal fitting is provided protruding from the top surface of the end of the lid plate on the side of the pivot joint, and a fixing metal fitting is installed on the end of the frame plate opposite to the pivot joint part. A ceiling ladder unit has a structure in which a compression spring is installed between the upper part of a support metal fitting and a fixed metal fitting, and both ends of the compression spring are pivotally connected to the support metal fitting and the fixed metal fitting so as to be movable up and down. 2. Claim 1, in which the pivoting position of the compression spring and the support fitting is located above a line connecting the pivoting position of the compression spring and the fixing fitting and the pivoting part of the lid body when the lid plate is closed. Structure of the ceiling ladder unit described in Section 1. 3. The structure of the ceiling ladder unit according to claim 1 or 2, wherein the fixing fitting is vertically elongated, and one end of the compression spring is pivoted to the fixing fitting so as to be vertically adjustable. 4. The structure of the ceiling ladder unit according to claim 1, 2, or 3, wherein one end of the compression spring is pivotally attached to the upper part of the support fitting so as to be vertically adjustable.