JPH0583300U - Ceiling storage ladder lock structure - Google Patents

Abstract

(57) [Summary] [Purpose] Lock the lid more safely while preventing operability. [Structure] A lid 2 is pivotally attached to one side edge of a substantially rectangular opening 1 formed in a ceiling so as to be swingable and openable. The ladder device 3 is attached to the upper surface side of the lid body 2 so as to be retractable and extendable. A lock body 4 is attached to the lid body 2 so as to project and retreat from the remaining three edges except the pivot side thereof. The lock body 4 is urged by the urging means to project. These three lock bodies 4 are rotatably and pivotally connected to one rotary body 5. The lock body 4 is configured to be retractable by the rotation of the rotary body 5. The operated portion 6 provided on the rotating body 5 is arranged so as to be exposed on the lower surface of the lid body 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a locking structure for a ceiling storage ladder, and more particularly to a technique for more safely locking a lid.

[0002]

[Prior Art]

 Conventionally, a lid is pivotally attached to one side edge of a substantially rectangular opening formed in a ceiling so that the lid can be swung open and closed, and a ladder device is attached to the top side of the lid so as to be retractable and extendable. One lock body is attached to the lid at the edge on the side opposite to the support side so that it can project and retract, and the operated portion of the lock body is operated from below to unlock the lid and remove the lid. It swings downwards and the ladder device is pulled down.

[0003]

[Problems to be solved by the device]

 However, in such a structure, the lock body is provided only on the edge portion of the lid body on the side opposite to the pivot side, and the lock body is provided on the remaining two opposite edge portions of the square. It is difficult to achieve a stable lock because there is no lock.Therefore, even if a lock body is provided at the edge of the other two, the operation system becomes complicated, and the operability to operate the lock from the floor side is used. However, there is a problem in that the ease of use is impaired.

The present invention is intended to solve such a problem, and an object thereof is to lock at three edges excluding the pivotal side without deteriorating the operability, thereby ensuring safety. (EN) Provided is a lock structure for a ceiling storage ladder which can improve the operability and can avoid a decrease in its operability.

[0005]

[Means for Solving the Problems]

 According to the present invention, a lid 2 is pivotally attached to one side edge of a substantially rectangular opening 1 formed in a ceiling so that the lid 2 can be swingably opened and closed, and a ladder device 3 is attached to an upper surface of the lid 2 so as to be retractable and extendable. Then, a lock body 4 is attached to the lid body 2 so as to project and retract from the remaining three edges except for the pivot side thereof, and the lock body 4 is urged by the urging means to project. Is rotatably and pivotally connected to one rotary body 5, and the lock body 4 is configured to be retractable by the rotation of the rotary body 5, and the operated portion 6 provided on the rotary body 5 includes the lid body 2. It is characterized in that it is exposed and disposed on the lower surface of the.

[0006]

[Action]

 All three edges except the pivot side are locked by the three lock bodies 4. Moreover, the operability is not deteriorated by the operation of the operated portion 6 causing the three lock bodies 4 to be withdrawn through the rotating body 5 to release the lock.

[0007]

【Example】

 A frame body 8 formed of four side walls is attached to the opening portion of the ceiling, an opening 1 is formed in the frame body 8, and a lid body 2 is provided at one side edge portion of the opening 1 with a rotary shaft (not shown). It is pivotally attached so that it can be swung open and closed. A ladder device 3 is attached to the upper surface side of the lid body 2 so as to be retractable and extendable. The ladder device 3 is formed by connecting a plurality of ladder elements 9 so that they can be folded or expanded and contracted, and the lid 2 can be lightly opened and closed by using a balance spring 10. The closed state of the lid body 2 is locked by the lock body 4 so that the closed state of the opening 1 of the frame body 8 can be maintained. The design of the ladder device 3 can be changed in various ways.

A lock body 4 is attached to the lid body 2 so as to project and retract from the remaining three edges of the lid body except the pivotal side. Specifically, the base plate 11 is attached to a substantially central portion of the edge of the lid 2 opposite to the pivot side, and the rotating body 5 is rotatably attached to the substrate 11 by the shaft 12. Links 14 are attached to the rotating body 5 on three sides via a shaft 13 so as to be relatively rotatable. The lock body 4 is pivotally connected to the tip of the link 14 via a shaft 15. The lock body 4 is slidably guided by a guide portion 7. An operated portion 6 is provided on the rotating body 5 so as to project, and the operated portion 6 is exposed on the surface side of the lid 2. As shown in FIG. 4B, the operated part 6 is formed in a semicircular plate shape. The rotating body 5 is rotationally biased by a biasing means (not shown) such as a spring, so that the three lock bodies 4 are biased to project.

Then, from the floor side, the engaging portion at the tip of the rod-shaped operating tool (not shown) is engaged with the semi-circular operated portion 6, and the rod-shaped operating tool is rotated to rotate the rotating body 5. 3 is rotated in the direction of arrow a in FIG. 3 (a) against the biasing means to retract the three lock bodies 4 via the links 14, and the lid body 2 is slowly lowered by the balance spring 10. The ladder device 3 is moved down, and the ladder device 3 is pulled down to the floor surface at the lower limit position.

As described above, the three lock bodies 4 lock all the remaining edges except the pivotal side, and yet the operation of the operated portion 6 causes the rotation body 5 to move through the three bodies. The two lock bodies 4 are not retired to release the lock, and the operability thereof is not lowered.

[0011]

[Effect of the device]

 As described above, according to the present invention, the lid is pivotally attached to one side edge of the substantially square opening formed in the ceiling so that the lid can swing and open, and the ladder device is attached to the upper surface of the lid so as to be retractable and extendable. Then, a lock body is attached to the lid body so as to be retractable from the remaining three edges except the pivotal side, and the lock body is urged by the urging means to project these three lock bodies into one rotating body. It is rotatably pivotally connected, and the lock body is configured to project and retract by the rotation of the rotating body, and the operated portion provided on the rotating body is arranged to be exposed on the lower surface of the lid body. , All three edges except the pivot side can be locked with three locks, and while increasing the safety, the three locks can be retracted via the rotating body by operating the operated part. There is an advantage that the lock can be released by using the lock and the operability is not reduced.

[Brief description of drawings]

FIG. 1 is a side sectional view of a ladder device according to an embodiment of the present invention in a pulled-down state.

FIG. 2 is a front sectional view of the above.

3 (a) and 3 (b) are bottom views showing the same effect.

4A is a side sectional view and FIG. 4B is a partial perspective view.

[Explanation of symbols]

 1 Opening 2 Lid body 3 Ladder device 4 Lock body 5 Rotating body 6 Operated part 7 Guide part

Claims (1)

[Scope of utility model registration request] 1. A lid is pivotally attached to one side edge of a substantially quadrangular opening formed in a ceiling so as to swing and open, and a ladder device is attached to an upper surface of the lid so as to be retractable and extendable. A lock body is attached to the body so as to project and retract from the remaining three edges except the pivot side, and the lock body is projectingly biased by the biasing means, and these three lock bodies are rotated to one rotating body. The lock body is freely pivotally connected, and the lock body is retractable by rotating the rotary body in the forward and reverse directions, and the operated portion provided on the rotary body is disposed so as to be exposed on the lower surface of the lid body. Locking structure for ceiling storage ladder.