JP3040628B2 - Ceiling storage ladder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling ladder mounted on a ceiling of a house or the like.

[0002]

2. Description of the Related Art In recent years, there is a case where a storage space is provided behind a ceiling of a house or the like, and a ladder body for entering and exiting the storage space is provided on the ceiling. In these units, for example, as shown in FIG. 7, a second ladder unit 6 is slidably provided on a first ladder unit 5 having one end pivotally attached to an opening in a ceiling. Ladder unit 6
The third ladder unit 7 is slidably provided, and the second ladder unit 6 is superimposed on the first ladder unit 5 and the third ladder unit 7 is superimposed on the second ladder unit 6. By rotating one ladder unit 5, the ladder unit 5 is housed in the opening of the ceiling. In addition, the third ladder unit 7 and the second ladder unit 6 are set in an extended state so as to be installed between the ceiling and the floor as shown in FIG. Here, the second
The ladder unit 6 is extended by sliding with respect to the first ladder unit 5, and the third ladder unit 7 is extended by sliding with respect to the second ladder unit 6. However, when the first ladder unit 5 is rotated and pulled out from the opening in the ceiling, it is dangerous that the second ladder unit 6 and the third ladder unit 7 slide during operation. Therefore, the extension of the second ladder unit 6 and the third ladder unit 7 is performed after the lock of each ladder unit by the lock members 30 and 31 is released. When pulling out each ladder unit, first, the first ladder unit 5, the second ladder unit 6, and the third ladder unit are rotated as shown in FIG. 8 is pulled out from the opening of the ceiling, and the lock member 30 shown in FIG. 8B is operated to move the projection 32 of the first ladder unit 5 locked to the lock piece 30a.
9a, the second ladder unit 6 is slid downward by its own weight to extend as shown in FIG. 9A, and then the lock member 31 is operated to operate the lock piece 31.
The projection 33 of the third ladder unit 7 locked to the a is released from the lock piece 31a, and the third ladder unit 7 is slid downward by its own weight to extend as shown in FIG. .

[0003]

However, in the above-described conventional example, the lock members 30 and 31 are used to prevent the ladder units from being slidably moved and extended. However, since the extension of each ladder unit performed by releasing the lock members 30 and 31 is performed by sliding the ladder units by their own weights, the extension of the lock members 30 and 31 is performed at the same time as the release of the lock members 30 and 31. The 2nd ladder unit 6 or the 3rd ladder unit 7 slides vigorously and moves downward, and there is a problem that the user hits the user and the danger is high. In this state, there is a problem that an impact is applied to a connection portion of each ladder unit to cause damage.

Further, at the time of storage, it is necessary for the user to lift each ladder unit by sliding the ladder unit upward, so that a large operating force is required to slide each ladder unit upward, such as an elderly person or a child. There is a problem that a user who is weak in power is inconvenient. An object of the present invention is to provide a ceiling storage ladder in which the ladder body is not stretched vigorously when extended, and can be stored with a light operating force when stored. Is what you do.

[0005]

In order to achieve the above object, the present invention provides a ceiling storage ladder which is transformed into a storage position stored in an opening of a ceiling and a drooping position suspended from the ceiling. In the first ladder unit 5 as the upper ladder body 1 having one end pivotally attached to the opening of the ceiling, the storage position in the state of being superimposed on the upper surface side by sliding movement and the lower end being in contact with the floor surface It includes a second ladder unit 6 and a third ladder unit 7 as a lower ladder body 2 that can be transformed into an extended position, and includes a lock member 3 that holds the lower ladder body 2 in a storage position,
In the state where the lock member 3 is released, the second ladder unit 6 and the third ladder unit 7 as the lower ladder body 2 are provided with a movement assisting member 4 for assisting the extension movement and the storage movement. The third ladder unit 7 is moved in the extending direction along the upper surface of the second ladder unit 6 in conjunction with the movement of the second ladder unit 6 in the extending direction along the upper surface of the second ladder unit 6. the third ladder unit 7 is provided with an interlocking mechanism for moving the second ladder unit 6 along the upper surface of the first ladder unit 5 in conjunction to move the housing direction the retracting direction Te, either the ladder unit 6 Person in charge
A stopper 23 is provided, and in the extended state,
The locked return prevention projection 24 is provided on another ladder unit 7.
It is a digit .

[0006]

The lock member 3 is released, and the second ladder unit 6 and the third ladder unit 7 as the lower ladder body 2 are released.
Is extended, the extension of the second ladder unit 6 and the third ladder unit 7 as the lower ladder unit 2 due to its own weight is suppressed by the movement assisting member 4, and the second ladder unit 6 as the lower ladder unit 2 vigorously. And the third ladder unit 7 is prevented from being extended, and the second ladder unit 6 and the third ladder unit 7 as the lower ladder body 2 are placed on the first ladder unit 5 as the upper ladder body 1. In the case where the second ladder unit 6 and the third ladder unit 7 as the lower ladder body 2 are urged upward by the movement assisting member 4, the second ladder unit 6 as the lower ladder body 2 And the second ladder unit 6 as the lower ladder body 2 is assisted by the storage movement of the third ladder unit 7.
And, the third ladder unit 7 can be slid on the first ladder unit 5 as the upper ladder body 1 with a light operating force. And, in order to improve the storability, the ceiling storage ladder according to the present invention is constituted by three ladder units, and further, by providing an interlocking mechanism, the operability is improved as follows. I have. That is, when the lock member 3 is released to extend the second ladder unit 6 and the third ladder unit 7 as the lower ladder body 2, the second ladder unit 6 extends along the upper surface of the first ladder unit 5. Since the third ladder unit 7 moves in the extending direction along the upper surface of the second ladder unit 6 in conjunction with the movement in the direction, it is not necessary to extend each ladder unit one by one, and the ladder unit can easily be in the hanging posture. The second ladder unit 6 and the third ladder unit 7 as the lower ladder body 2 can be transformed into a first ladder body 1 as the upper ladder body 1.
If the third ladder unit 7 is stored along the upper surface of the second ladder unit 6 along the upper surface of the second ladder unit 5 in the storage direction, As a result, the second ladder unit 6 moves in the storage direction, so that it is not necessary to store the foil ladder units one by one, so that the foil ladder unit can be easily changed to the storage posture. Ma
If any one of the ladder units 6 is provided with the locking portion 23,
Both return prevention locked by the locking portion 23 in the extended position
By providing the projection 24 on the other ladder unit 7,
In the long position the ladder can not shrink
You.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. The ceiling storage ladder is interposed between the ceiling and the floor to enter and exit the ceiling room provided in the house.When used, it is installed between the ceiling and the floor. When not in use, they are stored in the ceiling.

The ladder A constituting the main body of the ceiling storage ladder includes a first ladder unit 5 as the upper ladder 1 and a second ladder unit 6 and a third ladder unit 7 as the lower ladder 2.
And each of the ladder units 5, 6, 7 is slidably connected to each other. An entrance as an opening for entering and exiting the ceiling room is opened in the ceiling, and one end of an opening / closing lid (not shown) for opening and closing the entrance is mounted on one end of the entrance. On the front side (side of the ceiling room) of the opening / closing lid, when the opening / closing lid is swung downward to open the entrance, the first ladder unit 5 is integrally fixed via the bracket in a state of being turned up and down. Have been.

The first ladder unit 5 includes left and right vertical frames 5a.
A first guide bracket provided with a plurality of rollers 8a as shown in FIG. 1 and FIG. 5 on side surfaces of both vertical frames 5a. 8 is attached by a fastener 9. The main body of the first guide bracket 8 is formed by projecting a connection plate 8c from a support plate 8b having a pair of rollers 8a opposed to each other in the upper and lower directions. 5 is attached to the lower end of the first ladder unit 5 by being connected and fixed to the vertical frame 5a.

A lock member 3 is provided below the first ladder unit 5 for holding the second ladder unit 6 in a housed state in which the second ladder unit 6 is superimposed on the first ladder unit 5. As shown in FIG.
The storage tube 10 is provided with a locking projection 12 having a locking recess 12a formed on the side surface thereof. The locking projection 12 is urged upward by a spring member 13 housed and disposed in the housing cylinder 10, and is protruded from a side surface of the housing cylinder 10.
4 can be stored in the storage tube 10 by operating the same. 14a is a slit in which the operation protrusion 14 moves.

The second ladder unit 5 is provided with a second
A movement assisting member 4 for assisting the extension movement and the storage movement of the ladder unit 6 and the third ladder unit 7 is provided.
As shown in FIG. 3, the movement assisting member 4 is configured by housing and disposing a winding drum 4b in a storage case 4a, and a cable-like body 4c such as a wire led out from the winding drum 4b is formed. It is connected and fixed to the lower part of the second ladder unit 6 via a guide roller 4d. The take-up drum 4b is urged by a spring member or the like to rotate in a direction in which the cable 4c is taken up, and the cable 4c to be pulled out is pulled out against a spring force that urges the coil 4b to rotate. It has become.

On the other hand, the second ladder unit 6 has substantially the same shape as that of the first ladder unit 5 and is formed in a stepped manner by both left and right vertical frames 6a and a plurality of horizontal plates 6b. A guide rail 15 is formed on the entire surface of the vertical frame 6a, and a guide rail 16 is formed on the entire rear surface of the vertical frame 6a. A roller 8a on the first ladder unit 5 side is fitted to the guide rail 16 on the back surface side so as to run freely, and the rollers 8a arranged so as to be opposed to each other up and down hold the guide rail 16 therebetween. The second ladder unit 6 is slidably connected to the first ladder unit 5 by being fitted to the guide rail 16 . Pulleys 17 and 18 are attached to side surfaces of both vertical frames 6a.
As shown in FIGS. 1 and 2, a cable 20 such as a wire extends between the wires 7 and 18. Lower pulley 18
A lock pin 21 protrudes toward the side.
The cord 20 hung between the pulleys 17 and 18 is
One of the cable members 20a is locked by a locking portion 8d provided on the first guide bracket 8, and the other end is connected to a second guide bracket 22 described later via a pulley 17. Is locked by a locking hook 22e provided at the bottom. Further, one end of the other cable member 20 b is locked by a locking portion 22 d provided on the second guide bracket 22, and the other end is locked by the first guide bracket 8 via the pulley 18. The hook 8e is locked.
Here, the guide rails 15, 16 and the rollers 8a,
22a, pulleys 17, 18, cable body 20, first guide
The racket 8, the second guide bracket 22, etc.
The interlocking mechanism of the invention is configured.

The third ladder unit 7 has substantially the same shape as the first ladder unit 5 and the second ladder unit 6, and a plurality of horizontal plates 7b are provided between the left and right vertical frames 7a. As shown in FIG. 6, a second guide bracket 22 having a plurality of rollers 22 a is attached to side surfaces of both vertical frames 7 a by a fixing tool 9. The rollers 22a provided on the second guide bracket 22 are fitted to the guide rails 15 on the surface side of the second ladder unit 6 so as to be able to run freely. Guide rail 1
5 is fitted to the guide rail 15 so as to sandwich the
As a result, the third ladder unit 7 is
Are slidably connected with respect to each other. At the lower part of the third ladder unit 7, a locking portion 2 provided at the lower part of the second ladder unit 6 in a state where the third ladder unit 7 is extended.
The return prevention protrusion 24 locked to the third member 3 is provided rotatably.

Then, as the rollers 8a and 22a travel along the guide rails 15 and 16, respectively, the second ladder unit 6 moves with respect to the first ladder unit 5, and the third ladder unit 7 moves with respect to the first ladder unit 5. The two ladder units 6 can slide vertically. And
The second and third ladder units 6 and 7 are moved upward until the rollers 8a and 22a are in contact with the upper ends of the guide rails 15 and 16 and are regulated, respectively, so that the second and third ladder units 6 and 7 are moved. The storage position overlaps the first ladder unit 5 in an overlapping manner, and the second and third ladder units 6, 7
The rollers 8a and 22a are moved by the guide rails 15 and 1 respectively.
The second and third ladder units 6 and 7 are configured to be in an extended posture protruding downward from the first ladder unit 5 by contacting the lower end of the ladder unit 6 and moving it down until it is regulated.

Here, a first guide bracket 8 is connected to a lower part of the cable body 20 which is bridged between the pulleys 17 and 18, and a second guide bracket is connected to an upper part of the cable body 20. A bracket 22 is connected, the first guide bracket 8 is connected to the first ladder unit 5, and the roller 8 a is made to run freely with respect to the guide rail 16 of the second ladder unit 6. Since the roller 22a is connected to the third ladder unit 7 and the roller 22a is allowed to travel with respect to the guide rail 15 above the second ladder unit 6, the ladder body A in the extended posture is placed in the third posture so as to be in the storage posture. When the ladder unit 7 is moved upward,
Since the second guide bracket 22 is connected to the cord 20, the cord 20 moves in conjunction with the movement of the third ladder unit 7, but the first ladder is located below the cord 20. Since the first guide bracket 8 connected to the unit 5 is connected, the third ladder unit 7 is moved, and the second ladder unit 6 is moved in accordance with the movement of the rope 20 moving. The second ladder unit 6 moves in conjunction with the ladder unit 7, and the third ladder unit 7
It rises at twice the speed of the ladder unit 6.

The ladder body A is divided into the first, second, and third ladder units 5, 6, and 7 which are slidably supported as described above, and the ladder body A is in the storage posture. When lowering, the first ladder unit 5 is rotated together with the opening / closing lid so that the first ladder unit 5 projects into the room from the opening in the ceiling,
By operating the operation protrusion 14 of the lock member 3 and removing the lock pin 21 locked in the lock recess 12 a of the lock protrusion 12 from the lock protrusion 12, the second ladder unit 6 can move the movement assist member 4 by its own weight. The third ladder unit 7 slides downward in an extended posture in conjunction with the sliding movement of the second ladder unit 6 while pulling out the cord body 4c, and the ladder body A becomes the ceiling and the floor. It will be set between faces.

Here, the second ladder unit 6 and the third ladder
The cord 4c is pulled out by extending the unit 7 , but the rotational force of the winding drum 4b is increased by its own weight by the second ladder unit 6 and the third ladder unit 7.
The second ladder unit 6 and the third ladder unit 7 in which the rotational force of the winding drum 4b is slid by its own weight by the cord 4c. The second ladder unit 6 and the third ladder unit 7 are prevented from sliding down due to their own weight by being given to the ladder unit, and the ladder unit ends vigorously collide with each other by virtue of its own weight. The ladder body A can be extended by a simple operation only by operating the operation protrusion 14 of the lock member 3.

When the ladder body A is stored in the ceiling, the third ladder unit 7 is slid upward by operating the return preventing projection 24 to move the third ladder unit 7. 20 is moved and the second ladder unit 6 moves upward in conjunction with the third ladder unit 7, and the third ladder unit 7 and the second ladder unit 6 are in a storage position overlapping the first ladder unit 5 in an overlapping manner. By engaging the lock pin 21 of the pulley 18 provided on the second ladder unit 6 with the locking recess 12a of the locking projection 12 of the locking member 3, the second ladder unit 6 and the third ladder unit 7 are stored. Is held. Then, from this storage posture, the first ladder unit 5 is rotated together with the opening / closing lid and is stored in the opening of the ceiling, so that it is stored in the ceiling.

Here, when the second ladder unit 6 is slid upward in conjunction with the third ladder unit 7, when the user slides the third ladder unit 7 upward, it is wound on the winding drum 4b. The force of the cable body 4c to be applied is applied to slide the second ladder unit 6 and the third ladder unit 7 so that the third ladder unit 7 and the second ladder unit 6 are simply slid upward. In comparison, the third ladder unit 7 and the second ladder unit 6 can be easily slid upward.
The user operates the second ladder unit 7 with a small force in conjunction with the third ladder unit 7.
The ladder unit 6 can be slid to the storage position.

[0020]

[0021]

According to the present invention, as described above, the first ladder unit as an upper ladder body having one end portion pivotally attached to the opening of the ceiling has a storage position in a state of being superimposed on the upper surface side by sliding movement. A lock member for holding a lower ladder body in a storage position, comprising a second ladder unit and a third ladder unit as a lower ladder body which can be transformed into an extended position in which a lower end is in contact with a floor surface; Is released, the first ladder unit is provided with a movement assisting member for assisting the extension and storage movements of the second ladder unit and the third ladder unit as the lower ladder body. The second ladder unit and the third ladder unit are not vigorously extended by the movement assisting member that assists the extension movement of the second ladder unit and the third ladder unit. The second ladder unit and the third as
The second ladder unit and the third ladder unit as the lower ladder unit can be stored with a light operating force by a movement assisting member that assists the storage movement of the ladder unit. Further, in the present invention, since the ceiling storage ladder is formed of the first to third ladder units, the dimensions of each ladder unit can be shortened, and the storability can be improved. Further, the operability can be improved as described below by providing the interlocking mechanism as described above. That is, the third ladder unit moves along the upper surface of the second ladder unit along with the movement of the second ladder unit in the extension direction along the upper surface of the first ladder unit.
The ladder unit is moved in the extension direction, and the second ladder unit is moved along the upper surface of the first ladder unit in conjunction with the movement of the third ladder unit in the storage direction along the upper surface of the second ladder unit.
Since it has an interlocking mechanism that moves the ladder unit in the storage direction, it is not necessary to extend each ladder unit one by one at the time of extension, it can be easily transformed into a hanging position, and at the time of storage It is not necessary to store each ladder unit one by one, and the ladder unit can be easily changed to the storage posture. And one of the ladders
Locking unit provided and locked in extended position
Provide a return prevention projection that is locked to the ladder unit on other ladder units
The locking portion and the return prevention projection in the extended position
To prevent the ladder from shrinking.
To prevent accidental shrinkage of the ladder during use
It is shall can. Therefore, it is possible to provide a ceiling storage ladder having high safety and good operability.

[Brief description of the drawings]

FIGS. 1A and 1B show an extended posture of the present invention, wherein FIG. 1A is a side sectional view partially omitted, and FIG. 1B is a plan view partially omitted.

FIGS. 2A and 2B show an extended posture as viewed from an opposite side of the above, and FIG. 2A is a side sectional view partially omitted, and FIG. 2B is a plan view partially omitted.

3 (a) is a front view, FIG. 3 (b) is a side view, and FIG. 3 (c) is a plan view.

4 (a) is a front view, FIG. 4 (b) is a left side view, FIG. 4 (c) is a right side view, and FIG. 4 (d) is a plan view.

FIG. 5 is a partially omitted cross-sectional view showing a connection state between a first ladder body and a second ladder body.

FIG. 6 is a partially omitted cross-sectional view showing a connection state between a second ladder body and a third ladder body.

FIG. 7 is a perspective view showing a conventional example.

FIGS. 8A and 8B are explanatory diagrams illustrating the operation procedure of the above.

FIGS. 9 (a) and 9 (b) are explanatory diagrams illustrating the operation procedure of the above.

FIG. 10 is an explanatory diagram illustrating an operation procedure of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper ladder body 2 Lower ladder body 3 Lock member 4 Movement auxiliary member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E06C 9/00-9/12 E04F 11/00-11/06

Claims (1)

(57) [Claims] 1. A storage attitude stored in an opening in a ceiling;
A ceiling storage ladder that is transformed into a drooping posture that hangs down from the ceiling, and one end portion of the first ladder unit as an upper ladder body that is pivotally attached to an opening of the ceiling, and is superimposed on the upper surface side by sliding movement. Lock having a second ladder unit and a third ladder unit as a lower ladder body which can be transformed into a storage position in a retracted state and an extended position in a state in which the lower end is in contact with a floor surface, and a lock for holding the lower ladder body in the storage position. A movement assisting member that assists the extension movement and the storage movement of the second ladder unit and the third ladder unit as the lower ladder body in a state where the lock member is released, along the upper surface of the first ladder unit. Second
The third ladder unit is moved in the extending direction along the upper surface of the second ladder unit in conjunction with the movement of the ladder unit in the extending direction, and the third ladder unit is moved along the upper surface of the second ladder unit.
Comprising an interlocking mechanism which ladder unit moves the second ladder unit along the upper surface of the first ladder unit in conjunction to move the housing direction to the storage direction, either ladder unit
Locking part is provided at the extended position
A ceiling storage ladder, wherein a return prevention projection is provided on another ladder unit .