JPH08296385A - Ladder device for ceiling - Google Patents

Abstract

PURPOSE: To reduce operation mistakes such as the mistake of the stretching of a belt and the falling-off of the belt and the like at the time of the execution of works, to improve workability and to mount a protective cover easily on the belt in a ladder device for a ceiling, which has a folding type ladder housed in a ceiling opening section under the folded state and the rotary type cover opening and closing the ceiling opening section and in which the cover is opened and closed and the ladder is expanded and contracted by winding or delivering the belt, in which a front end is fitted to the cover, by a winder on the ceiling side. CONSTITUTION: A belt 33 is divided into split belts 33a, 33b in the longitudinal direction, and both belts can be connected by a connector. When a ladder device is divided into a ladder unit 76 on the ladder 13 side and a ceiling opening unit 75 consisting of a frame body 5, a cover 10, etc., and executed, the ceiling opening unit 75 is executed, and the ladder unit 76 is fitted to the cover 10. The split belt 33a on the ceiling opening unit 75 side and the split belt 33b on the ladder unit 76 side are coupled by a connector.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric ceiling ladder device and, more particularly, to a lid device for opening and closing the lid and extending and retracting the ladder by feeding and winding a belt member.

[0002]

2. Description of the Related Art Conventionally, as this type of ladder device, a device disclosed in Japanese Patent Application Laid-Open No. 5-141166 has been known. This one includes a lid that opens and closes the ceiling opening, and a folding ladder whose upper end is rotatably connected to the peripheral edge of the ceiling opening and which is folded in two into each upper and lower ladder.
The middle part of the lower ladder part of the ladder and the lid are connected by a connecting rod, and the tip part of the belt (string-like object) is connected to the intermediate part of this connecting rod, and the base end side of this belt is placed in the ceiling opening. By winding or unwinding, the connecting rod is pulled up or pulled down by the belt so that the lid opening / closing operation and the ladder expansion / contraction operation can be performed continuously. It is installed along the device.

[0003]

By the way, in this ladder device for a ceiling, the one in which all the parts are set in advance has a large weight, and the construction is extremely troublesome to mount on the ceiling portion. Is divided into a ladder unit consisting of a ladder, its folding mechanism, an elevating mechanism, etc., and a ceiling opening unit consisting of a frame body attached to the ceiling opening, its lid, a drive unit for opening and closing the lid, and expanding and contracting the ladder, etc. Then, the ceiling unit is first attached to the ceiling, and then the ladder unit is attached to the lid or the opening frame.

However, in that case, when the belt fed from the drive unit on the side of the ceiling opening unit is hung on the ladder unit, the belt laying procedure is complicated, so that a belt tying error occurs or the belt is guided. There were problems such as not being able to fit the pulleys enough, and being unable to attach a protective cover for the belt.

The present invention has been made in view of the above problems, and an object thereof is to improve the structure of the belt to reduce mistakes in work such as tying of the belt at the time of construction and work mistakes such as falling, thereby improving workability. At the same time, the protective cover of the belt can be easily attached to improve the appearance and the like.

[0006]

In order to achieve the above object, the present invention has a structure in which a belt member for opening and closing a lid and extending and contracting a ladder is divided in the length direction.

[0007] Specifically, in the invention of claim 1, a frame body arranged around the ceiling opening portion of the room and fixedly attached, and a base end rotatably attached to the frame body, the ceiling opening portion. It consists of a lid that opens and closes, and a number of ladders that are retractably connected to each other.When it is in use, it stretches over the ceiling opening and the floor, while when not in use, it contracts. A ladder housed in the ceiling opening, a belt member having a tip connected to the lid, and a belt winding means capable of winding and unwinding the base end side of the belt member are provided. It is premised on a ceiling ladder device in which at least a lid is opened and closed by winding and unwinding a belt member.

Further, the belt member is divided into at least two divided belts at an intermediate portion in the longitudinal direction, and the divided belts are integrally connected by a connecting tool.

According to a second aspect of the present invention, the ladder is a folding ladder in which adjacent ladder portions are rotatably connected by a hinge, and the ladder portions are folded when contracted.

According to the third aspect of the present invention, in the ladder, one of the adjacent ladder portions is slidably connected to the other, and the ladder portion is configured to slide and contract when contracted. To do.

[0011]

With the above construction, according to the first aspect of the invention, basically, the belt winding means winds or unwinds the belt member to open / close the lid and extend / contract the ladder.
That is, at the time of use, when the lid in the closed state is opened and the ladder is taken out from the ceiling opening, the belt member is unwound from the belt take-up means, the length of the belt member is extended by the unwinding of the belt member, and the tip end hangs down. As described above, the lid pivots around the base end and opens. During or after the opening of the lid, the ladder portion in the contracted state of the ladder extends, the lower end of the ladder contacts the floor surface, and the ladder is bridged between the ceiling opening and the floor surface.

On the contrary, after use, the extended ladder is contracted and stored in the ceiling opening, and when the lid is closed, the extended ladder is contracted and the belt is wound on the belt winding means. The member is wound up, and its length is shortened by winding up the belt member, and the lid is rotated around the base end portion in the direction opposite to the direction when the lid is opened, and the lid is closed. To be closed. The ladder in the contracted state is housed in the ceiling opening portion before or during the closing operation of the lid.

Since the belt member is divided into divided belts at an intermediate portion in the lengthwise direction, and the divided belts are integrally connected by a connecting member, the ladder device is connected to the ladder and its expansion / contraction mechanism. A ladder unit and a frame,
When performing the installation by dividing into a ceiling opening unit composed of a lid, a belt winding means, etc., first remove the connecting tool and divide the belt member, and then first install the ceiling opening unit,
Then, a ladder unit may be attached to the lid, and finally, the ends of the split belt extending from the ceiling opening unit and the split belt extending from the ladder unit may be joined with a connecting tool. Therefore, the workability of the ladder device can be improved, and mistakes such as mistakes in hanging the belt member and dropping the belt member are small.

It is also possible to put the main part of the belt member excluding the above-mentioned connecting tool into a unit by putting it in a protective cover, and expose only the connecting part to the outside.

According to the second aspect of the invention, it is possible to obtain the same effects as the above with respect to the ceiling ladder device having the folding ladder.

According to the third aspect of the invention, the same effect as the above can be obtained with respect to the ceiling ladder device having the slide type ladder.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIGS. 3 to 6 show Embodiment 1 of the present invention.
Is a ceiling of a room, and a storage room 2 such as an attic is formed above the ceiling. A rectangular opening 3 is opened at a predetermined position of the ceiling 1, and a plurality of plate members 5a, 5a, ... Having a vertical width are assembled in a rectangular shape at the peripheral edge of the ceiling opening 3. A frame 5 having a predetermined height is attached and fixed. One end side (the right side in each drawing) of the frame body 5 in the length direction is a lid mounting side, and a lid 10 for opening and closing the ceiling opening 3 in the frame body 5 is provided at the lower end of the plate material 5a on the lid mounting side. Hinge 1 at its base
It is rotatably attached by 1. This lid 10
Is a closed position in which the ceiling opening 3 in the frame 5 is closed in a horizontal posture, and an inclined position in which the tip portion hangs down to form a predetermined angle θ with the ceiling 1 and an open position in which the ceiling opening 3 is opened. Rotate between and.

Further, the frame body 5 has a frame-shaped frame body extension portion 6 which is extended so that the plate material 5a on the lid mounting side which supports the base end portion of the lid 10 serves as a partition wall. The extension portion 6 is formed with a motor housing chamber 7 whose upper and lower open portions are closed.

A foldable ladder 13 is attached to the rear surface (surface on the side of the storage chamber 2) of the lid 10. This ladder 1
3 is a form in which one long ladder is divided into three parts in the longitudinal direction into an upper ladder portion 14, a middle ladder portion 15 and a lower ladder portion 16. One end of the upper ladder portion 14 has a base end side left and right on the rear surface of the lid 10. The left and right plate-shaped upper ladder mounting members 19, 19 (1) are mounted on the square members 18, 18 (only one is shown) mounted and fixed on both sides.
(Only one of which is shown), and the other end is a pair of left and right plate-shaped lower ladder attachment members 2 on the left and right sides on the front end side of the back surface of the lid 10.
0 and 20 (only one of which is shown) are attached and fixed respectively, and the upper ladder portion 14 is arranged in parallel with the back surface of the lid 10 with a predetermined space therebetween.

One end of the middle ladder 15 is rotatably connected to the other end of the upper ladder 14 through a pair of left and right hinges 22, 22 (only one is shown). Each hinge 22 has two pieces 2 as shown in FIG.
3, 24 are rotatably connected by a shaft 25, one piece 23 of which is at the end of the vertical frame 14a of the upper ladder portion 14, and the other piece 24 is of the vertical frame 15a of the middle ladder portion 15. It is attached and fixed to each end.

At the other end of the middle ladder portion 15, one end of the lower ladder portion 16 has a pair of left and right hinges 26, similar to the above.
It is rotatably connected via 26 (only one is shown). When the ladder 13 is folded, as shown in FIG. 3, the lid 10 is closed to the back side of the lid 10 in the closed state.
The upper ladder portion 14 parallel to the upper ladder portion has a middle ladder portion 15 adjacent to the upper ladder portion 14, and a lower ladder portion 16 adjacent to the middle ladder portion 15 on top of the upper ladder portion 14 and the lower ladder portions 16 overlap with each other in parallel with each other. It is stored in the ceiling opening portion 3 in a state of being folded into a substantially N-shape at 22 and 26.

A belt insertion hole 28 is penetrated through the upper and lower left and right upper ends of the plate member 5a on the lid mounting side of the frame body 5, that is, the frame body 5 above the base end mounting portion of the lid 10.
Further, brackets 29, 29 are fixedly attached to both sides of the lid mounting side plate member 5a in the vicinity of the respective belt insertion holes 28, and guide pulleys 30, 30 are horizontally arranged at the same height position on both brackets 29, 29, respectively. It is attached so that it can rotate around the axis in the left-right direction. That is, these guide pulleys 30, 30 are arranged directly above the hinge 11 of the lid 10.

The other end of the upper ladder 14 is attached to the lid 1
Left and right pair of lower ladder mounting members 20 and 2 fixed to 0
At 0, a rod-shaped belt fixing member 31 extending in the left-right direction is inserted and fixed at a lower portion on the tip side of the lid so as to extend between the both ladder mounting members 20, 20. And this belt fixing member 3
End flat belts 33, 33 on both left and right ends
A tip portion (only one of which is shown) is formed into a loop and is inserted and locked. The intermediate portion of each belt 33 passes through a movable pulley 44 and a fixed pulley 40, which will be described later, and then the lid 10
And the upper ladder portion 14 and the lid 10 so that they are almost always parallel to
A space extending from the rear surface of the frame 10 to the base end side of the lid 10 is inserted into the belt insertion hole 28 of the plate member 5a of the frame body 5 while being stretched between the guide pulleys 30 on both sides thereof. .

Further, left and right belt winding pulleys 35, 35 (only one is shown) are arranged and housed in the motor housing chamber 7 of the frame body 5 in correspondence with the guide pulleys 30, 30, respectively. The two take-up pulleys 35, 35 are drivingly connected to one electric motor 36 capable of forward and reverse rotations via a speed reducing mechanism (not shown) such as a worm gear. The motor 36, the speed reduction mechanism, and the two take-up pulleys 35, 35 constitute a belt take-up device 37 that can take out and take up the belt 33 at the base end side. The two take-up pulleys 35, 35 are synchronously rotated to take-up or take-out each belt 33 at the base end side, and each belt 33 is taken up by the take-up pulley 35 by the reverse rotation of the motor 36, for example.
Belt fixing member 31 (tip of belt 33) from 0, 30
While the belt length up to the above is shortened, each belt 33 is unwound from the take-up pulley 35 by the forward rotation of the motor 36 to extend the belt length.

In this embodiment, the moving pulley 44
Is stopped at the tip position of the guide groove 42 described below, the lid 1 is wound by the winding and unwinding operations of the belts 33, 33 by the two winding pulleys 35, 35 of the belt winding device 37.
0 is rotated between a closed position and an open position to open and close, and when each belt 33 is wound by the belt winding device 37, the belt fixing member 3 is pulled from the guide pulleys 30, 30.
By shortening the belt length up to 1 (strictly speaking, a fixed pulley 40 described later), the lid 10 is closed in a horizontal position as shown in FIG.
When the cover 10 is extended from the above position, the length of the belt is increased to open the lid 10 in an inclined posture as shown in FIG.

As shown in detail in FIG. 6, the belt fixing member 3 is attached to the pair of left and right lower ladder attaching members 20, 20.
A fixed pulley shaft 39 extending in the left-right direction at a position corresponding to the length direction of 1 and the lid 10 (a position directly above the belt fixing member 31 in the closed state) is rotatable between both ladder attachment members 20, 20. The fixed pulley shaft 39 is inserted into and supported by the fixed pulley 4 on both left and right sides in correspondence with the position of the belt 33.
0, 40 (only one shown) are attached.
That is, each of the fixed pulleys 40 is axially supported on the rear surface of the front end portion of the lid 10 so as to be immovable in correspondence with the belt fixing member 31.

In addition, the lid 10 is attached to each lower ladder attachment member 20 rather than each fixed pulley 40 (belt fixing member 31).
Ladder mounting member 2 with a guide hole 42 (which may be a guide groove formed of a concave groove) extending substantially parallel to the lid 10 on the base end side of
It is formed so as to correspond to the left and right of the 0 guide hole 42. As shown in FIG. 6, the guide hole 42 extends from the tip end position between the belt fixing member 31 and the fixed pulley shaft 39 to the lid 1.
It extends parallel to the base end side of 0 along the lid 10 and reaches the base end position after bending so as to approach the back surface of the lid 10 at the other end side portion. In the guide hole 42, both ladder mounting members 2
A movable pulley shaft 43 extending in the left-right direction between 0 and 20
Is slidably supported through, and moving pulleys 44, 44 are attached to the left and right sides of the moving pulley shaft 43 in correspondence with the position of the belt 33. That is, each moving pulley 44 is moved relative to the guide hole 42 by the moving pulley shaft 43.
It is movably supported along the guide hole 42 via.

The ends of the movable pulley shafts 43, which are the shafts of the movable pulleys 44, project outside the respective ladder mounting members 20 (opposite to the opposing ladder mounting members 20) by a predetermined dimension, and the projecting portions thereof project into the projecting portions. First link material 46, 46, respectively
One end (only one is shown) is rotatably connected. The other end of each first link member 46 is connected to the ladder 1
3, the end portion of the middle ladder portion 15 on the upper ladder portion 14 side,
Specifically, in the hinge 22 connecting the upper and middle ladder portions 14 and 15 to each other, the hinge 47 is rotatably connected to the bracket 47 integrally attached to the piece 24 on the side of the middle ladder portion 15 via the connecting shaft 48.

Then, as shown in FIG. 6, a belt 33 between the guide pulleys 30, 30 and the belt fixing member 31.
The intermediate portion of the lower side of the fixed and movable pulleys 40, 44 is moved to the movable pulley 44 as it goes from the belt fixing member 31 side (the tip side of the belt 33) toward the belt winding device 37 side (the proximal end side). After being wound from the side and bent to the fixed pulley 40 side at the base end side of the lid (right side in FIG. 6), that is, the tip end side of the lid (left side in FIG. 6), it is wound around the fixed pulley 40 from below. The belt winding device 37 is wound around the base end side of the lid 10 so as to bend at the tip end side of the lid, and when the lid 10 is positioned at the open position and is opened in the inclined posture.
By the winding and unwinding operations of each belt 33 by the moving pulley 44, the moving pulley shaft 43 moves the moving pulley 44 along the guide hole 42 of the lower ladder mounting member 20, and the moving pulley 44 moves to move the first link member. The middle ladder portion 15 is rotated together with the lower ladder portion 16 via a shaft 46 about a shaft 25 of a hinge 22 which is a connection point with the upper ladder portion 14.

Further, a plate-like bracket 50 extending upward is provided at the tip of the lid 10, more specifically, at the tip of the right lower ladder mounting member 20 at the tip of the lid. Are fixed integrally by 51, ... At one end of the bracket 50, one end of the second link member 52 is rotatably supported by a connecting shaft 53 extending in the left-right direction. The other end of the second link member 52 is rotatably connected to a connecting member 54 mounted near the middle ladder portion 15 in the middle portion of the lower ladder portion 16 via a horizontal connecting shaft 55, and a lid. When the ladder 13 is extended in the open state of 10, the opening angle by the weight of the lower ladder portion 16 is adjusted by the second link member 52.

Further, the second link member 52 is extended to one end side thereof by a predetermined dimension, and the engaging pin 5 is provided at the extension thereof.
7 are protruded. A base end of a lever member 58 is rotatably supported by a connecting shaft 53 that supports one end of the second link member 52 on the bracket 50, and the base end of the lever member 58 has a connecting shaft 53. Arc hole 59 centered on
(A circular groove formed of a concave groove may be formed), and the engagement pin 57 is slidably engaged with the circular arc hole 59, the ladder 13 is in a folded state, and the lever member 58 is illustrated. When rotating in the counterclockwise direction at 6, the engaging pin 57 engages with one end (the left end in the figure) of the arc hole 59, and the base end of the lever member 58 covers the second link member 52. It is connected to the end portion on the front end side so as to rotate integrally.

A tension spring 62 is extended between the tip of the lever member 58 and a spring stopper member 60 attached to the middle portion of the lower ladder portion 16 which is integral with the lid 10. 6 urges the lever member 58 to rotate counterclockwise in FIG. 6 so that the ladder 13 is extended.

As a feature of the present invention, the belt 33 is
At a predetermined position in the middle portion in the length direction, specifically, in a portion stretched between the fixed pulley 40 and the guide pulley 30, there are two portions in the vicinity of the guide pulley 30 in the closed state.
It is divided into two divided belts 33a and 33b.

Further, both of these divided belts 33a and 33b
The ends of the are connected together by a connecting tool 68.
That is, as shown in enlarged detail in FIG.
The ends of 3a and 33b are bent in a loop shape and sewn together, and a small-diameter cylindrical member 69 having the same length as the belt width is inserted and fixed in the loop. In addition to the tubular member 69 of each of the divided belts 33a and 33b, the connecting member 68 has a U-shaped metal fitting 70 that is inserted into the tubular member 69 so that the distal end thereof projects, and the distal end of the metallic fitting 70. A plate 72 having metal fitting insertion holes 71, 71 into which the metal fittings can be fitted, and a pin hole 7 formed at the tip of the metal fitting 70, respectively.
0a, 70a are inserted into the retaining pins 73, 73. Then, with the end portions of the two divided belts 33a and 33b butted against each other, the metal member 7 is attached to each tubular member 69.
No. 0 is inserted so that the tip of the metal fitting protrudes, the tip of the metal fitting is inserted into the metal fitting insertion holes 71, 71 of the plate 72, and the retaining pin 73 is inserted into the pin hole 70a. The belts 33a and 33b are integrally connected by a connecting tool 68.

Reference numeral 63 is a middle portion of the frame body 5 in the longitudinal direction and the lid 1.
0 is a link mechanism that is installed between the back surface of 0 and an intermediate portion in the longitudinal direction and that connects two links 64 and 65. The direction in which the link 65 on the lid 10 side extends the link mechanism 63 by a spring (not shown) The link mechanism 63 adjusts the open position of the lid 10. Further, 66 is a lock device provided on the plate member 5a on the tip side of the lid of the frame body 5, and locks the lid 10 when the lid 10 is in the closed position.

Next, the handling operation of the ladder device of the above embodiment will be described. First, when the ladder 13 is folded when the ladder device is not in use, as shown in FIG.
The lid 10 closes the ceiling opening 3, and the ladder 13 is housed on the back side (upper side) of the lid 10. In this closed state, the base ends of the left and right belts 33, 33 are wound up by the belt winding device 37 and pulled, so that the belt length from the guide pulleys 30, 30 to the fixed pulley 40 becomes short. ing. That is, the intermediate portion of each belt 33 is wound around the guide pulleys 30 and 30, and the guide pulleys 30 and 30 are arranged on the frame body 5 above the position of the hinge 11 to which the base end portion of the lid 10 is attached. Therefore, due to the difference in height between the guide pulleys 30 and 30 and the hinge 11, the end of the lid 10 is suspended by the belt 33. Further, the lid 10 is locked and held in the closed position by the locking device 66.

Further, the intermediate portion of each belt 33 on the tip end side is fixed to the fixed pulley 40 and the movable pulley 44 on the base end side of the lid of the movable pulley 44 from the front end side of the belt 33 toward the base end side. Since the fixed pulley 40 is bent over to the base end side of the lid 10 after being bent toward the 40 side, the belt 33 is pulled by each take-up pulley 35 of the belt take-up device 37. At this time, the movable pulley 44 (movable pulley shaft 43) is pulled toward the tip side of the lid by the spans on both sides of the belt 33 wound around the movable pulley 44 and is positioned at the tip position of the guide hole 42 in the lower ladder attachment member 20.

With the lid 10 closed and the ladder 13 folded and housed in the ceiling opening 3, the lid 1 is closed.
When 0 is opened and the ladder 13 is extended and lowered, first, the lock device 66 is unlocked, and the lid 10 can be rotated in the opening direction. Next, while the unlocked state of the lock device 66 is maintained, the motor 36 of the belt winding device 37 is normally rotated, for example, and the belt 33 is paid out from each of the winding pulleys 35. Since the tensile force of the belt 33 decreases as the belt 33 is unwound from the winding pulley 35, the lid 10 pivots counterclockwise in FIG. 3 around the hinge 11 at the base end thereof to open. The belts 33 extend from the belt winding device 37 while being guided by the guide pulleys 30, 30 in accordance with the opening operation.

Then, as shown in FIG. 4, when the lid 10 is rotated with the ceiling 1 to a predetermined angle θ and reaches the open position where the tip end thereof is slanted down, the lid 10 is linked. Is stopped and held in the open position by.

Even after the lid 10 is positioned at the open position in this way, the belt 33 is continuously paid out from each winding pulley 35. By feeding the belt 33,
The belt 33 can move to the moving pulley 44 side while rotating through the fixed pulley 40, the pulling force of the belt 33 pulling the moving pulley 44 becomes small, and the moving pulley 44 is guided to the guide hole 42. Along with this, it becomes possible to move to the base end position side.

At this time, when the lid 10 is moved to the open position, the center of gravity of the portion where the middle and lower ladder portions 15 and 16 are combined has the hinge 22 that connects the upper ladder portion 14 and the middle ladder portion 15. Since it is closer to the lid 10 than the vertical plane passing through the shaft 25, the middle and lower ladder portions 15 and 16 cannot be opened in the extension direction as they are.

However, one end of the second link member 52 is pivotally supported by the lower ladder mounting member 20 on the right side located on the rear surface of the tip of the lid 10, and the other end of the second link member 52 is attached to the ladder 13.
The lower ladder portion 16 is rotatably connected to an intermediate connecting member 54, and the base end portion of the lever member 58 is connected to one end portion of the arc hole 59 with respect to the end portion of the second link member 52 on the tip end side of the lid. Is integrally pivoted by the engagement of the engagement pin 57 of
This lever member 58 is urged by the tension spring 62 so that the ladder 1
3 is urged to rotate so that one end of a first link member 46 is connected to the moving pulley shaft 43 supporting the moving pulley 44. The other end of is connected to the bracket 47 at the end of the middle ladder 15 of the ladder 13 on the upper ladder 14 side.
Therefore, from these structures, the rotational biasing force of the lever member 58 by the tension spring 62 acts on the moving pulley 44 via the first link member 46, and the moving pulley 44 is closed along the guide hole 42. It is urged in the direction toward the base end. Then, when the tensile force of the belt 33 becomes smaller than the rotational biasing force of the lever member 58 by the tension spring 62, the middle ladder portion 15 rotates around the hinge 22 together with the lower ladder portion 16, and The center of gravity of the ladder portions 15 and 16 moves to the side opposite to the lid 10 with respect to the vertical plane passing through the shaft 25 of the hinge 22. Further, upon receiving the rotational biasing force of the lever member 58, the moving pulley 44 starts to move to the base end position side along the guide hole 42.

That is, when the middle and lower ladder portions 15 and 16 are opened with the lid open, even if the center of gravity of the ladder portions 15 and 16 remains on the lid 10 side, the lever spring 58 is rotated by the tension spring 62. Due to the biasing force, the center of gravity of the ladder 13 can be smoothly and quickly moved away from the lid 10, and the extension operation of the ladder 13 in the opened state can be automatically started.

After the movement of the center of gravity, the ladder portions 15 and 16 try to open in the extension direction due to their own weight.
Therefore, the moving pulley 44 receives the turning biasing force of the lever member 58 by the tension spring 62, and subsequently receives the turning biasing force of the middle and lower ladder portions 15 and 16 by its own weight, and moves along the guide hole 42. It moves to the end position side, whereby the middle and lower ladder portions 15 and 16 continue to rotate in the extension direction. Then, as shown in FIG. 5, when the middle and lower ladder portions 15 and 16 are rotated so as to be aligned with the upper ladder portion 14 and the ladder 13 is extended, and the lower end thereof comes into contact with the floor surface. , The moving pulley 44 has a guide hole 4
Positioned at the base end position of 2, the motor 36 of the belt winding device 37 is stopped in this state, the feeding of the belt 33 from the winding pulley 35 is stopped, and the ladder 13 is held in the extended state.

At this time, one end of the second link member 52 is pivotally supported by the lower ladder mounting member 20 on the right side located on the rear surface of the end of the lid 10, and the other end of the second link member 52 is attached to the ladder 1.
3 is rotatably connected to the connecting member 54 at the intermediate portion of the lower ladder portion 16 of the third ladder 3, so that the lid 10 is attached to the ladder 13
The upper ladder portion 14 and the lower ladder portion 16 which are fixed to each other are connected by the middle ladder portion 15 as well as the lower ladder portion 1
The middle portion of 6 and the tip portion of the lid 10 are connected by the second link member 52. Therefore, with the lid open, the ladder 1
When the 3 is extended, the middle and lower ladder parts 15 and 16 are connected to the hinges 22 that connect the upper and middle ladder parts 14 and 15.
And a hinge 26 that connects the middle and lower ladder parts 15 and 16
And a connecting shaft 55 that connects the lower ladder portion 16 and the second link member 52, and a connecting shaft 53 that is a connecting portion of the second link member 52 to the tip portion of the lid 10, and have four positions as apexes. While keeping the parallelogram, it also rotates like a magic hand. Therefore, the lower ladder section 16 is replaced by the middle ladder section 1
There is no problem that the lower ladder portion 16 is suddenly opened and the user hits his / her head or pinches his / her finger.

On the other hand, after using the ladder device, when the ladder 13 in the extended state shown in FIG. 5 is folded and accommodated in the ceiling opening portion 3, the motor 36 of the belt winding device 37 is used.
For example, the belt 33 is reversed and the belt 33 is wound around each winding pulley 35. With this winding, the moving pulley 44 at the base end position of the guide hole 42 is pulled from the fixed pulley 40 and the belt fixing member 31 to the tip side of the lid by the belt 33, and the moving pulley 44 moves along the guide hole 42. Move from the base position to the tip position. This moving pulley 4
By the movement of 4, the first link member 46, the end portion of which is connected to the moving pulley 44, is changed in the clockwise direction in the drawing to push up the end portion of the middle ladder portion 15 on the upper ladder portion 14 side, and the middle portion thereof. The ladder portion 15 is rotated around the hinge 22 so that the ladder portion 15 faces the upper ladder portion 14, and the lower ladder portion 16 rotates around the hinge 26 so that the ladder portion 15 faces the middle ladder portion 15.
Folding of 3 begins. Then, when the movable pulley 44 reaches the tip position of the guide hole 42, the initial state immediately after the lid is opened is restored, and the ladder 13 is folded into a substantially N-shape (state in FIG. 4).

Even after the ladder 13 is folded, the belt 33 is continuously wound by the belt winding device 37.
Then, when the movable pulley 44 reaches the tip position of the guide hole 42, the movable pulley 44 cannot move further, so that the movable pulley 44 functions as a mere pulley for direction change, and the fixed pulley 40 in the belt 33. The part from to the tip is locked. Therefore, with the winding of the belt 33 by the winding device 37, the tip of the lid 10 whose tip is fixed by the belt fixing member 31 is pulled toward the guide pulley 30, and the guide pulleys 30, 30 While the fixed pulley 40, that is, the belt length to the tip of the lid 10, is shortened, the tip of the lid 10 is pulled up and the lid 10 is rotated in the closing direction.
When is rotated to the closed position, the winding of the belt 33 by the belt winding device 37 is stopped, and the lid 10 is stopped and held at the closed position. As a result, the ceiling opening 3 is closed, and the ladder 13 is housed in the folded state on the back side (upper side) of the lid 10 (state of FIG. 3).

In this embodiment, the belt winding device 37 is attached to the frame 5 inside the ceiling opening 3, that is, to the ceiling 1 side, and the belt 33 is wound around each winding pulley 35 of the belt winding device 37. , The belt fixing member 31 near the tip of the lid 10 is pulled, and the lid 10 is pulled up and closed against the weight of the ladder 13 and the lid 10, while the lid 10 is opened and lowered by the weight of the ladder 13 and the lid 10. Since the belt 33 may be unwound from the belt winding device 37, the load acting on the hinge 11 of the lid 10 is extremely small and its durability can be ensured, and the belt 33 can be unwound or wound up by the belt winding device 37. Lid 10 depending on speed
Can be opened and closed smoothly.

Moreover, even when the ladder 13 expands and contracts when the lid 10 is opened, the hinge 11 of the lid 10 is less burdened and durability can be further ensured, and the belt 33 can be wound up. Also, the ladder 13 can be smoothly expanded and contracted in accordance with each feeding speed.

The upper ladder portion 14 of the ladder 13 is the lid 10.
The belt 33 is attached to the back surface of the cover 10 with a space therebetween, and the belt 33 is fixed between the upper ladder portion 14 and the back surface of the lid 10 so that the belt 33 is almost always parallel to the lid 10.
Since the belt 33 is stretched between the belt 33 and the belt 30, the belt 33 is hidden behind the upper ladder portion 14, a sufficient arrangement space can be secured, and the appearance of the ladder 13 can be improved.

The construction work for mounting the ladder device of the above embodiment on the ceiling is performed as follows. That is, as shown in FIG. 1, the ladder device is divided into a ceiling opening unit 75 and a ladder unit 76 in advance. Ceiling opening unit 7
5 includes a frame body 5, a lid 10, each guide roller 30, a belt winding device 37, and the like, while the ladder unit 76 includes the ladder 1
3, upper and lower ladder attaching members 19 and 20 attached to the lower ladder portion 16, a belt fixing member 31, a fixed pulley 4
0, moving pulley 44, first and second link members 46, 52
Etc. At this time, the belt 33 is also divided into the divided belt 33a on the side of the ceiling opening unit 75 and the divided belt 33b on the side of the ladder unit 76, and the divided belt 33a on the side of the ceiling opening unit 75 is placed at its tip side (divided end portion). ) Is unwound from the belt winding device 37 of the ceiling opening unit 75, and the divided belt 33b on the ladder unit 76 side is provided with the base end side (divided end) extending upward from the fixed pulley 40. To do.

Next, as shown in FIG. 1, the lower ladder portion 16 of the ladder 13 on the side of the ladder unit 76 is attached and fixed to the rear surface of the lid 10 on the side of the ceiling opening unit 75, so that both units 75 and 76 are integrated. Assemble and connect. Thereafter, the divided ends of the two divided belts 33a and 33b are connected to each other by a connecting member 68 to form the belt 33 into a series.

As described above, the belt 33 is divided at the intermediate portion in the length direction, and the divided belts 33a and 33b are both divided.
Can be integrally connected by the connecting tool 68, and the belt 33 divided into the divided belts 33a and 33b is joined by the connecting tool 68 after the ladder unit 76 is attached to the ceiling opening unit 75, so that the ladder device The workability at the site can be improved, mistakes such as tying of the belt 33 and mistakes such as falling off can be reduced, and reliable operation of the ladder device can be secured.

Since the belt 33 is divided,
The main part of the belt 33, excluding the connecting member 68, can be easily unitized by putting it in a protective cover (not shown). It can enhance the shine.

(Embodiment 2) FIG. 7 shows Embodiment 2 of the present invention (note that the same parts as those in FIGS. 3 to 5 are designated by the same reference numerals and detailed description thereof will be omitted), and other types will be described. It is applied to the folding ladder device.

That is, in this embodiment, the ladder 13 'is folded into the two upper and lower ladder portions 14 and 16. The upper end portion of the upper ladder portion 14 is a plate material 5 on the lid mounting side of the frame body 5.
A hinge 77 rotatably connects to the upper end of a, and a hinge 78 rotatably connects the lower end of the upper ladder portion 14 and the upper end of the lower ladder portion 16. A tip end of a connecting rod 79 is rotatably connected to an intermediate portion of the lower ladder portion 16 along a vertical plane, and a base end of the connecting rod 79 is rotatably connected to a rear surface of a tip portion of the lid 10. . The tip of the belt 33 is connected and fixed to the intermediate portion of the connecting rod 79. The belt 33 is hung on the guide pulley 80 pivotally supported on the lower end of the upper ladder portion 14, and then is attached to the intermediate portion in the longitudinal direction of the frame body 5. Fixed guide member 81
It is wound around the take-up pulley 35 of the belt take-up device 37 via two guide pulleys 82 and 83 which are pivotally supported via the. Open and close 10 and expand and contract the ladder 13 '. That is, when the belt 33 is unwound from the winding pulley 35 in the closed state, the lid 10 is rotated from the closed position to open, and in the open state, the connecting rod 79 continues to rotate around its base end by its own weight as shown in the figure. When the belt 13 is wound around the take-up pulley 35 while the ladder 13 'folded in a substantially V-shape is extended by rotating the belt 13 in a rotational direction, the intermediate portion of the connecting rod 79 is wound. The belt 13 is pulled up and the connecting rod 79 is rotated in the counterclockwise direction around the base end to fold the ladder 13 'in the extended state and the lid 10 is rotated from the open position to be closed. There is.

In this embodiment, the ladder device is the ceiling opening unit 75 including the frame 5, the lid 10, the belt winding device 37, the guide member 81, the ladder 13 'and the connecting rod 7.
It is divided into a ladder unit 76 composed of 9 grades. The belt 33 is also divided into divided belts 33a and 33b on the ceiling opening unit 75 side and the ladder unit 76 side, and both divided belts 33a and 33b are integrally connected by a connecting tool 68 (see FIG. 2).

Therefore, in this embodiment, the ladder device is divided into the ceiling opening unit 75 including the frame 5, the lid 10, the belt winding device 37 and the like, and the ladder unit 76 including the ladder 13 'and the connecting rod 79 and the like. At the same time, the belt 33 is divided into the two divided belts 33a and 33b. In the construction of the ladder device on site, the upper ladder portion 14 of the ladder 13 'is
The upper end of the belt is attached to the plate member 5a of the frame body 5 by the hinge 77, and the proximal end of the connecting rod 79 is attached to the back surface of the lid 10, and then the two divided belts 33a and 33b are connected to each other by the connecting member 68. Therefore, also in this embodiment, the same operational effect as the above embodiment can be obtained.

(Embodiment 3) FIGS. 8 to 10 show Embodiment 3 which is applied to a slide type ladder device. In this embodiment, as shown in FIGS. 8 and 9, the ladder 13 ″ is divided into upper, middle and lower ladder portions 14, 15 and 16, but unlike the first embodiment, they are adjacent to each other. One of the ladder portions 14, 15 (or 15, 16) is slidably connected to the other, and the ladder portion 14, 15 is contracted when contracted.
15 and 16 are configured to slide and contract.

That is, the upper ladder portion 14 is attached and fixed to the back surface of the lid 10 by the ladder attaching members 19 and 20.
A guide rail 87 is provided on an upper surface (front surface) of each of the left and right vertical frames 14a, 14a of the upper ladder portion 14, and a first guide bracket 88 is provided at a lower end portion of each guide rail 87.
The lower fitting part is fitted and fixed. The upper fitting portion of the first guide bracket 88 projects upward from the guide rail 87, and on the projecting portion, two pairs of rollers 89, 89, ... Spaced in the length direction of the guide rail 87 are axially supported. Has been done.

Left and right vertical frames 15 in the middle ladder section 15
Guide rails 90 and 91 are provided on the upper surface (front surface) and the lower surface (rear surface) of each of a and 15a, and the lower guide rail 91 has two pairs of front and rear rollers 89, 89, ... At the lower end of the upper ladder portion 14. Is rotatably fitted. At the upper end of the lower surface side guide rail 91, the first
Second guide bracket 9 similar to guide bracket 88
The upper fitting portion of the second guide bracket 92 is fitted and fixed, and the lower fitting portion of the second guide bracket 92 is a lower guide rail 91.
Of the guide rail 91
Of two pairs of rollers 93, 93, ...
Each roller 93 is rotatably fitted to a guide rail 87 on the upper surface of the upper ladder portion 14 described above. As a result, the middle ladder portion 15 is connected to the upper ladder portion 14 so as to slide and expand.

On the other hand, the lower fitting portion of the third guide bracket 94 is fitted and fixed to the lower end portion of the upper guide rail 90 of the middle ladder portion 15, and the upper fitting portion of the third guide bracket 94 is fixed. Are projected above the guide rail 90, and two pairs of rollers 95, 95, ... Are axially supported by the protruding portion at intervals in the length direction of the guide rail 90.

Further, guide rails 96 are provided on the lower surfaces (back surfaces) of the left and right vertical frames 16a, 16a of the lower ladder section 16, and the guide rails 96 have two pairs of front and rear rollers at the lower end of the middle ladder section 15. 95, 95, ...
Is rotatably fitted. The upper fitting portion of the fourth guide bracket 97 is fitted and fixed to the upper end portion of the guide rail 96.
A pair of rollers 98, 98, which are spaced apart in the longitudinal direction of the guide rail 97 are pivotally supported at the lower fitting portion of the guide rail 97. Each of the rollers 98 is a guide rail 90 on the upper surface of the middle ladder portion 15. Is rotatably fitted to. As a result, the lower ladder portion 16 is connected to the middle ladder portion 15 so as to slide and expand and contract. Then, the middle and lower ladder portions 15 and 16 are slid until the rollers 93 and 98 on the second and fourth guide brackets 92 and 97 are located at the upper ends of the guide rails 87 and 90, respectively, so that both ladder portions 1
Ladder 5 and 16 are stacked on the upper ladder 14
While contracting 3 ″, by sliding the middle and lower ladder portions 15 and 16 until the rollers 93 and 98 come into contact with the first and third guide brackets 89 and 94 at the lower end portions of the guide rails 87 and 90, respectively, Both ladders 15,
Ladder 1 with 16 protruding from the upper ladder portion 14
Extend 3 ".

Then, as shown in FIG. 10, each belt 33 whose base end is wound around each winding pulley 35 of the belt winding device 37 has a plate member 5a at the middle portion in the longitudinal direction of the frame body 5.
The pulley 1 is hung on a pulley 99 rotatably supported on the inner surface and then hangs downward, and further rotatably supported on an intermediate portion of the upper ladder portion 14.
00, extending toward the lower end side of the ladder portion 14 and hung from the pulley 101 pivotally supported on the lower end side toward the upper end side of the ladder portion 14 again to a pair of pulleys 102 pivotally supported on the upper end portion. After that, it passes through the inside of the guide rail 87 of the upper ladder portion 14 and extends downward, and the tip thereof is the second guide bracket 9 described above.
2 is connected to the lower fitting portion.

Further, one end of the operating belt 103 is connected to the lower fitting portion of the fourth guide bracket 97 having the upper fitting portion fitted and fixed in the guide rail 96 of the lower ladder portion 16. . The operating belt 103 is inserted through the upper guide rail 90 of the middle ladder portion 15 and wound around a pair of pulleys 104, 104 pivotally supported on the upper end of the vertical frame 15a of the middle ladder portion 15. This pulley 10
4, 104 to the lower guide rail 9 of the middle ladder section 15
1 which is supported by the lower ends of the vertical frames 15a, 15a
It is wound around a pair of pulleys 105, 105, passes through the inside of the upper guide rail 90 again from the pulleys 105, 105, and the other end is fitted under the original fourth guide bracket 97 via the tension adjusting member 106. It is connected to the joint. Further, the intermediate portion of the operating belt 103 is integrally connected and fixed to the lower fitting portion of the first guide bracket 88 at a predetermined position of the insertion portion of the lower guide rail 91.

With such a belt winding structure, the lid 10 is opened and closed by feeding and winding the belt 33 by the winding pulley 35 of the belt winding device 37, and the middle and lower ladder portions 15 and 16 are slid. Ladder 13 "
When the belt 33 is extended and contracted and the belt 33 is extended, first, the lid 10 is pivoted from the closed position to open, and then the ladder 13 ″ in the contracted state in the opened state is extended. The second guide bracket 92 connected thereto is slid downward together with the middle ladder portion 15 to extend the middle ladder portion 15 from the upper ladder portion 14, and the operating belt 103 is slid downward to move the operation belt 103. Is rotated counterclockwise around the middle ladder portion 15 in FIG. 10 with reference to the connecting portion of the first guide bracket 88 in the middle portion thereof, and the fourth guide bracket 97 is lowered together with the lower ladder portion 16 integral therewith. The lower ladder portion 16 is slid to the side to extend from the middle ladder portion 15. On the other hand, when the belt 33 is wound around the winding pulley 35, it is in an extended state. Child 13 "was deflated, second guide bracket 92 by pulling with the middle section ladder section 15 is slid to the upper side of the middle ladder section 15 upper ladder section 14
10 and the operation belt 103 is rotated clockwise around the middle ladder portion 15 in FIG. 10 with reference to the connecting portion of the first guide bracket 88 in the middle portion by sliding the middle ladder portion 15 to the upper side. Then, the fourth guide bracket 97 is slid upward together with the lower ladder portion 16 so that the lower ladder portion 16 is superposed on the middle ladder portion 15. After the ladder 13 ″ is contracted, the lid 10 is pivoted from the open position to be closed. It is like this.

In this embodiment, the ladder device is composed of the frame 5, the lid 10, the belt winding device 37, the ceiling opening unit 75 including the pulley 99, the ladder 13 ″, and the ladder mounting members 19 and 20. Divided into a ladder unit 76,
The belt 33 is also divided into two divided belts 33a and 33b, and both divided belts 33a and 33b are integrally connected by a connecting member 68.

Therefore, in this case, the ladder device is divided into the ceiling opening unit 75 including the frame 5, the lid 10, the belt winding device 37 and the like, and the ladder unit 76 including the ladder 13 ″ and the ladder mounting members 19 and 20 and the like. Also, the belt 33 is divided into two divided belts 33a and 33b, respectively, and conveyed to the site, and at the site, after the lower ladder portion 16 of the ladder 13 ″ is attached and fixed to the back surface of the lid 10, both units 75 and 76 are assembled, Both split belts 33a and 33b may be connected by the connecting member 68, and the same effect as in the first embodiment can be obtained.

In each of the above embodiments, the belt 33 is divided into the two divided belts 33a and 33b, but it may be divided into three or more if necessary.

[0070]

As described above, according to the invention of claim 1, the telescopic ladder is housed in the ceiling opening in the contracted state, and the rotatable lid for opening and closing the ceiling opening is provided. The belt member, the tip of which is attached to the lid, is wound or unwound by the winding means on the ceiling side to open / close the lid and expand / contract the ladder. By splitting in the direction and being connectable with a connecting tool, it is possible to reduce work mistakes such as belt hanging mistakes and falling during construction to improve workability, and to attach a protective cover for the belt easily The appearance etc. can be improved.

According to the invention of claim 2, since the ladder is a folding ladder, it is possible to improve the workability and appearance of the ceiling ladder device having the folding ladder.

According to the third aspect of the present invention, since the ladder is the slide ladder, it is possible to improve the workability and appearance of the ceiling ladder device having the slide ladder.

[Brief description of drawings]

FIG. 1 is a side view showing a construction state of a ladder device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a divided portion of a belt and a connecting tool thereof.

FIG. 3 is a side view showing a stored state of the ladder in the first embodiment.

FIG. 4 is a side view showing a state in which a lid is opened.

FIG. 5 is a side view showing a state where the ladder is extended.

FIG. 6 is an enlarged side view showing the mechanism at the tip of the lid.

FIG. 7 is a view corresponding to FIG. 1 and showing a second embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 1 and showing a third embodiment of the present invention.

FIG. 9 is a perspective view showing a ladder device according to a third embodiment.

FIG. 10 is a perspective view showing a ladder expansion / contraction mechanism of Example 3.

[Explanation of symbols]

 1 Ceiling 3 Opening 5 Frame 10 Lid 13, 13 ', 13 "Ladder 14 Upper Ladder 15 Middle Ladder 16 Lower Ladder 33 Belt 33a, 33b Divided Belt 35 Belt Winding Pulley 36 Motor 37 Belt Winding Device ( Belt winding means) 40 Fixed pulley 42 Guide hole 44 Moving pulley 46 First link material 52 Second link material 58 Lever member 68 Connecting tool 75 Ceiling opening unit 76 Ladder unit

Claims (3)

[Claims] 1. A frame body arranged around and fixed to a ceiling opening of a room, a lid whose base end is rotatably attached to the frame body, and a lid which opens and closes the ceiling opening, and mutually contractible. A ladder that is composed of a plurality of connected ladders and is stretched between the ceiling opening and the floor in a used state, and is stored in the ceiling opening in a contracted state when not used, A belt member having a tip connected to the lid, and a belt winding means capable of winding and unwinding the base end side of the belt member, and by the winding and unwinding operation of the belt member by the belt winding means, In a ceiling ladder device at least capable of opening and closing a lid, the belt member is divided into at least two divided belts at an intermediate portion in the length direction, and the divided belts are integrally connected by a connecting tool. Special Ladder device for ceiling to collect. 2. The ceiling ladder device according to claim 1, wherein the ladder is a folding ladder in which adjacent ladder portions are rotatably connected by a hinge, and the ladder portions are folded when contracted. A ladder device for a ceiling, which is characterized by being present. 3. The ceiling ladder device according to claim 1, wherein one of the adjacent ladder portions is slidably connected to the other, and the ladder portion slides and contracts when contracted. A ladder device for a ceiling, which is a configured slide ladder.