JPH0411068Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a ceiling ladder device used for climbing up and down the ceiling.

(Conventional technology) Conventionally, folding devices consisting of multiple upper and lower ladder sections,
Ceiling ladder devices with a deployable ladder body are known. This ladder device is configured so that when in use, each ladder section is unfolded and strung diagonally between the ceiling and floor, and when not in use, each ladder section is folded and stored in the attic. . Then, the ladder main body is installed on the canopy, and the canopy is supported on the edge frame of the ceiling opening by a bendable hanging link in the middle part, and when in use, the hanging link is brought into contact with the locking member. It is known that the canopy and the ladder body are held in the extended state by locking the canopy and the ladder body in the extended state.

By the way, in order to properly install the ladder main body between the ceiling and the floor, it is necessary to adjust the projecting angle of the ladder main body, etc. according to the distance between the ceiling and the floor. For this reason, for example, as shown in Japanese Utility Model Application Publication No. 55-150138, a locking member is installed to lock the above-mentioned hanging link and maintain the extended state of the canopy and the ladder body when the ladder device is used. Some ladders are designed to be adjustable in position, thereby changing the extension angle of the ladder body. However, in the ladder device having the above configuration, the locking member is usually attached to the frame of the ceiling due to the installation space, and the locking member comes into contact with the vicinity of the upper end pivot of the hanging link. Therefore, if the mounting position of this locking member is changed even slightly, the lower end of the hanging link will move significantly, and the extension angle of the canopy and the ladder body will change significantly. Therefore, there is a problem that fine adjustment is difficult.

It is also conceivable that the locking member may be placed in contact with the lower end of the hanging link to enable fine adjustment, but in this case, the locking member would protrude below the ceiling frame. This poses the problem of being dangerous and damaging the appearance.

(Purpose of the invention) The present invention was devised to solve the above-mentioned problems, and it is possible to easily and accurately fine-tune the amount of protrusion of the ladder main body from the canopy, and to enable adjustment over a wide range. To provide a ceiling ladder device whose ladder main body can be properly installed between the ceiling and the floor, and which is safe and does not damage its appearance.

(Structure of the invention) The invention consists of a frame attached to an opening in the ceiling,
A canopy that is pivotally attached to this frame so that it can be opened and closed freely,
When the canopy is closed, the ladder body is folded and stored above the canopy, and when the canopy is opened, it is unfolded and spanned between the above-mentioned edge frame. In the ceiling ladder device, the ladder body is supported by the edge frame via a bendable hanging link and is configured to be held in an expanded state by a locking member. This bracket is attached to the upper surface of the canopy, and integrally includes a mounting plate that is attached to the canopy and a connecting plate that is connected to the ladder body. A long hole extending in the length direction of the ladder body is provided so that the amount of protrusion of the protruding ladder body can be adjusted, and a long hole is provided in the other plate in the direction of tilting of the ladder body so that the angle of the ladder body with respect to the canopy can be adjusted. It is provided with an elongated hole that extends.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 designates an edge frame attached to an opening in a ceiling 6, 2 a canopy pivotally mounted on the edge frame 1 so as to be openable and closable, and 3 a ladder body. This ladder main body 3 has upper, middle and lower ladder parts 3a, 3b, 3.
c are connected to each other so that they can be folded and expanded via hinge fittings 4a and 4b, and the upper ladder part 3
A is attached to the upper surface of the canopy 2 via brackets 5a and 5b. In addition, this ladder main body 3 is connected to each ladder main body 3a, 3b, 3c when in use.
is unfolded and spanned between the ceiling 6 and the floor 7, and is configured to be folded onto the canopy 2 and stored above the opening in the ceiling 6 when not in use.

A hanging link 9 is provided between the edge frame 1 and the canopy 2, and a ladder attachment is supported by the edge frame 1 via this hanging link 9. That is, the suspension link 9 includes an upper member 11 which is pivotally supported by a pin 10 at the intermediate portion and is connected to each other so as to be bendable and extensible.
and a lower member 12, the upper end of the upper member 11 is pivotally supported on the bracket 13 attached to the edge frame 1 at the pivot 8, and the lower end of the lower member 12 is attached to the upper surface of the lid 2. It is pivotally supported by a bracket 14. A hook 15 formed at the upper end of the lower member 12 is engaged with an engaging pin 16 protruding from the upper member 11, so that the hanging link 9 is locked in an extended state. The canopy 2 and the ladder main body 3 are suspended from the edge frame 1 by the suspension links 9 and held in an overhanging state.

As shown in FIG. 2, the brackets 5a and 5b that support the upper ladder section 3a on the upper surface of the canopy 2 include a mounting plate 50 attached to the canopy 2, and a mounting plate 50 that stands up from one end of this mounting plate 50 and supports the upper ladder section 3a. Part 3
The mounting plate 50 has a connecting plate 51 connected to the side surface of a, and the mounting plate 50 has a long hole 5 that serves as an insertion hole for a mounting bolt.
2 is formed along the length direction of the ladder main body 3,
In addition, elongated holes 53, which serve as insertion holes for mounting bolts, are formed in the connecting plate 51 along the height direction of the brackets 5a, 5b, and the ladder main body 3 can be attached to the canopy 2 through these elongated holes 52, 53. It is configured so that the position and mounting angle can be adjusted. Note that knurlings 54 and 55 are formed at the peripheral edges of the elongated holes 52 and 53 to prevent the mounting bolts from slipping.

As shown in FIG. 1, an arm 17 is projectingly provided below the upper end pivot portion 8 of the hanging link 9, and the tip portion of this arm 17, that is, the vicinity 24 of the upper end pivot portion 8 of the hanging link 9, and the above-mentioned A gas spring 18 is arranged between the ceiling 6 and the edge frame 1 as a biasing body that exerts a spring force in a direction to rotate the upper member 11 about the upper end pivot 8 . The gas spring 18 includes a cylinder 19 filled with high-pressure gas and oil, and a piston rod 20 supported by the cylinder 19.
The distal end of the cylinder 19 is rotatably supported on the edge frame 1, and the base end of the cylinder 19 is the upper end of the suspension link 9.
It is rotatably supported in the vicinity 24 of. The inside of the cylinder 19 is divided into two chambers by a piston provided at the base end of the piston rod 20, and a spring force is applied to the piston rod 20 by applying pressure such as high pressure gas to the piston. It is configured as follows. In addition, a small-diameter communication hole is formed in the piston, and the flow resistance when high-pressure gas, etc. passes through the communication hole prevents the piston from moving rapidly, thereby exerting a buffering effect. .

The upper member 11 of the suspension link 9 is biased clockwise in the figure by the gas spring 18 around the upper end pivot 8 when the upper ladder portion 3a is extended. Further, at a position near the overhang where the upper ladder portion 3a is pushed up a little from the above-mentioned overhang state, the upper end pivot portion 8 of the hanging link 9 is placed on the axis A of the gas spring 18, as shown by the solid line in FIG. position, and when the upper ladder part 3a is further pushed up, the upper member 11 of the hanging link 9 is moved to the gas spring 18.
It is configured to be biased counterclockwise around the upper end pivot 8. When the ladder main body 3 is folded and stored, the suspension link 9 is biased in the bending direction by the gas spring 18, as shown by the imaginary line in FIG. It will be supported in the stored state.

The suspension link 9, gas spring 18, etc. are provided in pairs on the left and right with the ladder main body 3 in between. Further, in FIG. 1, 25 is a handrail for lifting and lowering.

In the above configuration, when using the ladder device, open the lid 2 and connect the ladder parts 3a,
By unfolding 3b and 3c, the book ladder main body 3 is extended. When the ladder main body 3 is extended and extended, the hook 15 of the lower member 12 of the hanging link 9 and the engagement pin 16 of the upper member 11 are engaged, and the hanging link 9 is locked in the extended state. The lid body 2 is suspended by the suspension link 9 and its extended state is maintained. Therefore, the lid body 2
Since the upper ladder 3a is locked in the extended state and cannot be pushed down any further, the upper ladder section 3a and the middle ladder section 3b can be kept in the extended state without providing any special locking means at the connecting part. can be reliably maintained. Further, the upper member 11 of the suspension link 9 is urged clockwise in the figure by the gas spring 18 around the upper end pivot portion 8, and the hook 15 and the engagement pin 16 are pressed in the engagement direction. Therefore, the extended state of the hanging link 9 is reliably maintained, and even when an unexpected push-up force is applied to the ladder main body 3, the ladder main body 3 can be stably held in the extended extended state.

In the unfolded and extended state of the ladder main body 3, if the amount of protrusion of the ladder main body 3 from the ceiling frame 1 and the distance from the ceiling frame 1 to the floor 7 do not match exactly, the upper ladder section By loosening the mounting bolts on the mounting plates 50 of the brackets 5a and 5b that connect the brackets 5a and 5b, and sliding the ladder main body 3 up and down along the elongated holes 52, the ladder main body protrudes downward from the canopy 2. The amount of protrusion 3 is finely adjusted according to the distance from the ceiling edge frame 1 to the floor 7.

Furthermore, the connecting plate 5 of the brackets 5a and 5b is
The ladder body 3 can also be fixed by tightening the mounting bolts 1 and changing the protrusion angle of the ladder body 3.
The amount of protrusion in the height direction can be changed.
That is, as shown in FIG. 4, loosen the mounting bolts 57 of the lower bracket 5b, and then tighten the upper ladder section 3 around the mounting bolts 56 of the upper bracket 5a.
By rotating a in the counterclockwise direction, the inclination angle of the ladder body 3 can be made gentler and the height distance from the ceiling frame 1 to the lower end of the ladder body 3 can be reduced. Furthermore, in order to further reduce the above distance from this state, the lower mounting bolt 57
After tightening to a certain extent, the upper mounting bolt 56 is loosened and the ladder main body 3 is rotated counterclockwise about the lower mounting bolt 57 to set its inclination angle more gently. In addition, by rotating the upper ladder part 3a clockwise in the opposite direction to the above operation, the ladder main body 3 can be installed on a steep slope, and the height direction from the ceiling edge frame 1 to the lower end of the ladder main body 3 can be adjusted. It is also possible to increase the distance.

By adjusting the mounting position of the ladder body 3 with respect to the canopy 2 in this way, the amount of protrusion of the ladder body 3 can be finely adjusted without changing the opening angle of the canopy 2. The ladder main body 3 can be installed in a predetermined expanded state without changing the biasing action of the ladder body 9.

When storing the ladder main body 3 when not in use, first push up and rotate the middle and lower ladder parts 3b and 3c around the hinge fitting 4a from the extended state shown in FIG. Rotate the lower ladder part 3c around the metal fitting 4b to form the middle ladder part 3b.
and the lower ladder part 3c are folded in half and then folded onto the upper ladder part 3a. Next, if you press the middle part of the hanging link 9 to the right in the figure,
The hook 15 and the engagement pin 16 can be easily disengaged. In addition, if the above-mentioned hanging link 9 is configured so that it is locked in an inverted dog shape when extended,
The above-mentioned engagement can be automatically released by simply pushing up the ladder main body 3. Then, when the upper ladder 3a or the canopy 2 is pushed up, the upper member 11 and arm 17 of the suspension link 9 rotate around the upper end pivot 8, as shown by the imaginary line in FIG. 18 is shifted below the upper end pivot 8, and the upper member 11 is biased by the gas spring 18 in the counterclockwise direction in the figure around the upper end pivot 8. As a result, gas spring 1
The spring force of 8 is applied to the ladder body 3 via the hanging link 9.
Therefore, the ladder main body 3 can be stored with an extremely small force.

Further, when the arm 17 and the axis of the gas spring 18 are nearly perpendicular to each other at a position near the storage of the ladder main body 3, and the moment acting on the suspension link 9 increases, the gas spring 18
If the push-up force is set to be greater than the weight of the ladder main body 3, etc., the ladder main body 3 will automatically shift to the retracted state from that position, which is extremely convenient. In this case, if the configuration is such that the mounting angle of the gas spring 18 can be adjusted by providing a large number of mounting holes at the tip of the arm 17 and selecting one of these mounting holes to mount the gas spring 18. The pushing up force of the ladder main body 3 can be easily and appropriately set. For this reason, the push-up force by the gas spring 18 is finely adjusted so that the ladder body 3 can be extended with a slight force when in use, and can be retracted without requiring much force when not in use. be able to.

Furthermore, since the gas spring 18 has a rich buffering effect, it is possible to prevent the ladder main body 3 from being suddenly pushed up when stored or suddenly lowered when extended. In addition, when the ladder main body 3 is in the retracted state, the hanging link 9 and the locking member that locks the hanging link in the extended state, that is, the hook 15 and the engagement pin 16
will be stored in the attic, making it safe and
It also has an excellent appearance.

Further, when the above embodiment uses the gas spring 18 as the biasing body for the upper member 11 of the hanging link 9, it is possible to obtain sufficient stroke and spring force despite being small, and it has a rich cushioning property. , the extension and retraction operations of the ladder main body 3 can be performed smoothly and safely. However, in this invention, any actuating device that exerts the same stroke and spring force as the gas spring 18 can be used as the biasing body.

Further, the arrangement of the biasing bodies such as the gas spring 18 and the shape of the hanging link 9 are not limited to the above embodiments, and various changes can be made. For example, as the upper member 11 of the hanging link 9, a member formed in an L shape as shown in FIG. 5 may be used, or a member formed in an inverted L shape as shown in FIG. You can.

In the above embodiment, the hanging link 9 is used as a locking means for holding the lid body 2 and the ladder body 3 in an extended state.
Hooks 15 and engagement pins 16 are provided near the connecting pins 10 of the upper and lower members 11 and 12 of A locking member may be provided on the ceiling frame 1 or the like.

(Effects of the invention) As explained above, in the present invention, the bracket for attaching the ladder body to the top surface of the canopy is provided with a long hole extending in the length direction of the ladder body and a long hole extending in the tilting direction of the ladder body. Therefore, the amount of protrusion of the ladder main body can be easily adjusted within the range of the long hole extending in the length direction of the ladder main body, and the angle of the ladder main body can be easily adjusted within the range of the long hole extending in the direction of tilting of the ladder main body. Can be easily adjusted. Therefore, it is possible to easily and accurately finely adjust the amount of protrusion of the ladder body in the height direction according to the distance between the ceiling and the floor, and the ability to adjust the amount of protrusion of the ladder body using both elongated holes is The adjustment range can be increased by both the angle adjustment function of the main body. In addition, there is no need for the locking member for locking the canopy and the ladder body in the extended state to protrude below the ceiling frame, which is advantageous in that it is safe and does not damage the appearance.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the ceiling ladder device according to the present invention, Fig. 2 is a perspective view showing the structure of the bracket, Fig. 3 is an enlarged view of main parts showing the action of the gas spring, and Fig. 4 FIGS. 5 and 6 are explanatory diagrams showing the adjustment operation of the extension angle of the ladder main body, and are partially cutaway enlarged views showing another embodiment of the suspension link. 1... Edge frame, 2... Canopy, 3... Ladder body,
5a, 5b... Bracket, 7... Floor, 9... Hanging link, 15... Hook, 16... Engaging pin,
52, 53...Long hole.

Claims (1)

[Scope of utility model registration request] A frame attached to an opening in the ceiling; a canopy pivoted to the frame so that it can be opened and closed; when the canopy is closed, the frame is folded and stored above the frame, and when the canopy is opened, the frame and the floor and a ladder main body consisting of a plurality of upper and lower ladder sections that are unfolded and spanned between the canopy and the canopy, the canopy being supported by the edge frame via a bendable hanging link at the middle part, and the canopy being latched. In a ceiling ladder device configured so that the expanded state is maintained by a member, the ladder main body is attached to the upper surface of the canopy via a bracket, and the bracket is connected to a mounting plate attached to the canopy and the ladder main body. The ladder body is integrally equipped with a connecting plate that is connected to the canopy, and one of the mounting plate and the connecting plate is attached in the length direction of the ladder body so that the amount of protrusion of the ladder body that protrudes downward from the canopy can be adjusted. A ceiling ladder device, characterized in that a long hole is provided in the other plate, and the other plate is provided with a long hole that extends in the tilting direction of the ladder body so that the angle of the ladder body with respect to the canopy can be adjusted.