JP2710535B2 - 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 devices, the ladder body is stored in the ceiling portion or suspended from the ceiling by the movement of a cord such as a wire based on the forward / reverse drive of the drive motor. Some of such ceiling storage ladders are configured to support the ladder body in the storage posture by the tension of the cord body.

[0003]

However, in the above-mentioned conventional example, if the cord is cut off for some reason, the support of the ladder body in the stored posture is released.
There was a danger that the ladder body would hang down vigorously in the room and hit people in the room. An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a ceiling storage ladder in which a ladder body is supported in a storage posture even when a cord body is cut, and the safety is high. .

[0004]

According to the present invention, in order to achieve the above object, the ladder body 1 is transformed into a storage position in which the ladder body 1 is stored in the opening of the ceiling and a hanging position in which the ladder body 1 hangs down from the ceiling. The ladder body 1 is provided with a holding member 50 having a strip 40 and a locking hook 52 at a lower end at an opening, and a stopper 70 capable of locking the locking hook 52 provided on the holding member 50. A locking position in which the locking hook 52 is hooked and locked to the stopper 70 by axially attaching the central portion in the longitudinal direction of the holding member 50, and a storage position in which the locking hook 52 is in a storage state where the locking hook 52 is disengaged from the stopper 70. A spring member 80 that is rotatable and urges the locking hook 52 to the locking position is attached to the holding member 5.
The upper end of the holding member 50 is connected to the upper end of the holding member 50, and the cable member 40 is abutted in the storage position, and biases the locking hook 52 to the storage position against the spring force of the spring member 80. It is provided.

[0005]

Thus, the ladder body 1 is transformed into a hanging posture hanging from the ceiling by the movement of the cord body 40 and a storage posture housed in the opening of the ceiling. When the cord 40 supporting the ladder 1 in the retracted position is cut off for some reason, the holding member 50 given to the holding member 50 by the contact of the cord 40 with the projection 53 is stored. The holding force in the posture is released, and the holding member 50 is rotated by the spring member 80 so that the locking hook 5 of the holding member 50 is released.
2 is hooked and locked by the stopper 70 to prevent the ladder body 1 from hanging down into the room.

[0006]

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 part A and the floor part B to enter and exit the ceiling room provided in the house, and when used, the ceiling storage ladder is connected to the ceiling part A and the floor part B. And the ceiling A when not in use
It is designed to be stored in.

The ladder body 1 constituting the main body of the ceiling storage ladder is divided into a first ladder unit 2, a second ladder unit 3, and a third ladder unit 4, and each ladder unit 2, 3, 4
They are connected to each other slidably. An entrance C as an opening for entering and exiting the ceiling room is opened in the ceiling A, and an entrance C is provided at one end of the entrance C.
One end of an opening / closing lid 5 for opening and closing the door is mounted on the shaft. As shown in FIG. 3, the first ladder unit is turned on the front side (the side of the ceiling room) of the first ladder unit in a state in which the door 5 is turned upward and downward when the door C is opened. 2 are integrally fixed via a bracket 7.

The first ladder unit 2 includes left and right vertical frames 2a.
A plurality of horizontal plates 2b are erected between the vertical frames 2a, and are formed on the stairs. Guide rail grooves 8 are respectively formed on the surface portions of both vertical frames 2a over substantially the entire length. At the lower end of the guide rail groove 8, as shown in FIG. 5, a lower fitting portion 9b of a first guide bracket 9 having upper and lower U-shaped fitting portions 9a and 9b connected back to back is provided. Two pairs of rollers 9c are rotatably supported on an upper fitting portion 9a projecting above the guide rail groove 8 of the first guide bracket 9 in a state of being stopped and fixed.

On the other hand, the second ladder unit 3 has substantially the same shape as that of the first ladder unit 2 and is formed in a stepped manner by both left and right vertical frames 3a and a plurality of horizontal plates 3b. A guide rail groove 10 is formed on the front surface of the vertical frame 3a, and a guide rail groove 11 is formed on the rear surface of the vertical frame 3a. The roller 9c on the first ladder unit 2 side is fitted in the guide rail groove 11 on the rear surface side so as to run freely. Further, an upper fitting portion 12a of the second back side guide bracket 12 having the same shape as the first guide bracket 9 is fitted into the upper end portion of the guide rail groove 11 in a state of being screwed and fixed. Lower fitting part 1
A roller 12c is rotatably mounted on the roller 2b.
2c is fitted in the guide rail groove 8 of the first ladder unit 2 so as to run freely. On the other hand, the lower fitting portion 13b of the second front side guide bracket 13 is fitted into the lower end portion of the guide rail groove 10 on the front surface side in a state where the lower fitting portion 13b is screwed and fixed. , A roller 13c is rotatably supported.

The third ladder unit 4 has substantially the same shape as the first ladder unit 2 and the second ladder unit 3, and the left and right vertical frames 4a of the third ladder unit 4 have a rear surface side. A guide rail groove 14 is formed in the groove. A roller 13c on the side of the second ladder unit 3 is movably fitted into the guide rail groove 14, and an upper fitting portion 15a of the third guide bracket 15 has a screw at the upper end of the guide rail groove 14. The guide rail groove 10 is fitted to the lower fitting portion 15b of the guide bracket 15 in the state of being fixed and fixed.
A roller 15c which is fitted so as to be able to run freely is rotatably supported.

The rollers 9c, 12c, 13c,
15c are guide rail grooves 11, 8, 14, 10 respectively.
By traveling inside, the second ladder unit 3 and the third ladder unit 4 are vertically slidable with respect to the first ladder unit 2 and the second ladder unit 3, respectively. And the second and third ladder units 3,
The second and third ladder units 3 and 4 are overlapped with the first ladder unit 2 by moving the roller 4 upward until the rollers 12c and 15c contact the upper ends of the guide rail grooves 8 and 10 and are regulated. The storage position overlaps with
Rollers 12c, 15c with second and third ladder units 3, 4
Are brought into contact with the lower fitting portion 9b of the first guide bracket 9 and the lower fitting portion 13b of the second front side guide bracket 13 and are respectively moved downward until they are regulated, so that the second and third portions are moved.
The ladder units 3 and 4 are configured to have an extended posture that protrudes downward from the first ladder unit 2.

Reference numeral 16 denotes a four-sided frame provided at the periphery of the entrance C. A drive motor is provided in a case 17 provided on one side of the four-sided frame 16 (the hinge 6 of the opening / closing lid 5). 18 are furnished. Further, a take-up pulley 19 operatively connected to a drive motor 18 is rotatably supported in the case 17. The take-up pulley 19 is configured to wind the take-up belt 20 with the base end of the take-up belt 20 serving as a cord body 40 fixed thereto.
0 passes through a looseness detection pulley 21 attached to the case 17 and a pulley 22 attached to the four-sided frame 16.
A pair of pulleys attached to the upper end portion of the vertical frame 2a via the pulleys 23 and 24 attached to the intermediate portion and the lower end portion of the vertical frame 2a of the first ladder unit 2 and in a state of intersecting therewith. Through the guide rails 25, 25 a, it is integrally connected to the lower fitting portion 12 b of the second back guide bracket 12 through the guide rail groove 8.

As shown in FIG. 2, a holding member 50 rotatable in a vertical direction is attached below the pulley 22. The holding member 50 is mainly composed of a band-shaped thin plate member 51, and is mounted on a mounting plate 60 attached to the inner side surface of the four-sided frame 16 so that the central portion thereof is pivotally mounted so as to be vertically rotatable. I have. A locking hook 52 is integrally provided at a lower end of the thin plate member 51, and a projection 53 is provided at an upper end thereof in a direction orthogonal to the thin plate member 51. In the illustrated embodiment, the projection 53 is constituted by a roller 54 rotatably mounted. Here, the holding member 50 has a stopper 70 provided on the first ladder unit 2 to be described later since the locking hook 52 is pivotally mounted at the central portion in the longitudinal direction.
The locking hook 52 is rotatable between a locking position where the locking hook 52 is disengaged from the stopper 70 and a locking position where the locking hook 52 is disengaged from the stopper 70. A spring member 80 such as a coil spring is connected to one end of the mounting plate 60, and the other end of the spring member 80 is connected to an upper end of the thin plate member 51. The spring member 80 constantly urges the upper portion of the holding member 50 in the right direction on the sheet of FIG.
To the locking position. The protrusion 5
The take-up belt 20 as the cord 40 is brought into contact with the hook 3, and the holding member 50 is locked by the take-up belt 20 against the spring force of the spring member 80.
To the storage position. A stopper 70 having a bar 71 formed in a U-shape protrudes from the upper surface of the vertical frame 2 a of the first ladder unit 2. The stopper 70 serves as a holding member 5 when the ladder body 1 is in the storage posture.
The first ladder unit 2 is attached to the vertical frame 2 a of the first ladder unit 2 at a position set on the side of the zero hook 52.

On the other hand, an operation belt 26 is movably wound around the second ladder unit 3, and one end of the operation belt 26 is fixed to the lower fitting portion 15 b of the third guide bracket 15. The other end of the operation belt 26 passes through the guide rail groove 10, passes through a pair of pulleys 27, 27 a attached to the upper end of the vertical frame 3 a, and further passes through the guide rail groove 11 to form the first belt. The third guide is integrally connected to the upper fitting portion 9a of the guide bracket 9, and further passes through the guide rail groove 10 via a pair of rollers 28, 28a attached to the lower end of the vertical frame 3a. It is connected to an operating belt tension adjusting member 29 attached to the lower fitting portion 15b of the bracket 15.

When the drive motor 18 is driven to wind the winding belt 20 so as to store the ladder body 1 in the extended posture in the ceiling A, the leading end of the winding belt 20 is moved to the second ladder unit 3 side. Second back guide bracket 12 fixed to
, The second ladder unit 3 rises in conjunction with the winding of the winding belt 20. Further, as the second ladder unit 3 rises, it is movably wound around the second ladder unit 3, and one end of the first ladder unit 2
The working belt 26 connected to the first guide bracket 9 fixed on the side is wound up, whereby the working belt 26
The third ladder unit 4 fixed to the second front side guide bracket 15 to which the other end of the ladder unit is connected moves up at twice the speed of the second ladder unit 3. In this way, the ladder body 1 is divided into the second and third
The ladder units 3 and 4 are reduced to the storage position overlapping the first ladder unit 2 in a superimposed manner, but the lower end of the first ladder unit 2 is lifted by further winding up the winding belt 20 from this storage position. The body 1 swings upward with the hinge 6 as a fulcrum together with the opening / closing lid 5, becomes horizontal, and is configured to be closed in the entrance C by the opening / closing lid 5 and stored in the ceiling part A.

Reference numeral 30 is a fixing member having a substantially rectangular cross section, one end of which is fitted and supported in a concave groove formed in the case 17 and the other end of which is integrally attached via a screw or the like to a bracket 22a which supports the pulley 22. The belt cover 30 covers the winding belt 20 from the case 17 to the pulley 22. Then, the belt cover 3
0 is set so that there is a gap between the inner surface of the four-sided frame 16 and a position where a fingertip of a human can enter, so that a person ascending or descending can hold the belt cover 30 when holding the hand as a handrail. I have.

In the embodiment of the present invention constructed as described above, the ladder body 1 is divided into the first, second, and third ladder units 2, 3, and 4 which are slidably supported as described above. When the drive motor 18 is driven to wind the winding belt 20 so that the ladder body 1 in the extended posture is housed in the ceiling portion A, the second belt connected to the winding belt 20 is rotated.
The ladder unit 3 is moved upward, and the operation belt 26 is wound up with the upward movement of the second ladder unit 3, and the third ladder unit 4 is also moved upward, so that the storage position overlaps the first ladder unit 2 in a stacking manner. Becomes Then, by further winding the winding belt 20 from this storage position, the ladder body 1 swings upward together with the opening / closing lid 5 so that the door C is closed by the opening / closing lid 5 and the ladder body 1 is And is stored in the ceiling A in a state of being supported by the tension. On the other hand, when lowering the ladder body 1 stored in the ceiling part A, the drive motor 18 is reversed and the winding belt 20 is fed out, so that the ladder body 1 is moved together with the opening / closing lid 5 until it is regulated by the stopper belt 30. The ladder body 1 swings down to the extended position, and the ladder body 1
And the floor B.

By driving the drive motor 18 in this manner, the ladder 1 can be automatically stored in the ceiling A or set between the ceiling A and the floor B, As a result, it is not necessary to lift and lower the ladder by hand as in the conventional case, and anyone can operate the ladder easily and safely. The ladder body 1 in the retracted position is supported by the tension of the winding belt 20 as the cord member 40. However, if the winding belt 20 is cut off for any reason, the winding belt 20 will not move. The force applied to the holding member 50 to hold the holding member 50 in the stowed position is released by contacting the protrusion 53, and the holding member 50 is rotated by the spring member 80 to lock the holding member 50. 52 is instantly hooked and locked by the stopper 70, thereby preventing the ladder body 1 from hanging down inside the room, thereby ensuring safety in the storage posture.

In this case, when the ladder 1 is set between the ceiling A and the floor B, the winding belt 20 exposed to the outside is protected by being covered by the belt cover 30. You. As a result, it is possible to effectively avoid direct contact of an object or a person with the winding belt 20, and it is possible to reliably avoid the inconvenience of the winding belt 20 being cut early. Therefore, the electric ceiling storage ladder can be made safe with less trouble or the like due to belt cutting. In addition, since the belt cover 30 also functions as a handrail provided on the ceiling A, the safety of a person who moves up and down the ladder 1 is improved.

In the embodiment shown, the take-up pulley 19 is driven by a drive motor 18 to
Has been described, the ladder body 1 is moved by moving the ladder body 1. However, the invention is not limited to this, and the winding pulley 19 is manually driven to move the rope body 40. , Thereby the ladder body 1
May be moved manually.

Also, in the illustrated embodiment, the ladder body 1 comprises a first ladder unit 2, a second ladder unit 3,
Although the case where the ladder unit 4 is constituted by three ladder units is shown, the invention is not limited to this, and the ladder unit 4 may be constituted by three or less or three or more ladder units. Things.

[0022]

As described above, the present invention is provided with a rope body which transforms the ladder body into a storage position in which the ladder is stored in the opening of the ceiling and a hanging position in which the ladder is suspended from the ceiling. A holding member provided with a hook is provided in an opening, a stopper which can be locked by a locking hook provided in the holding member is provided in a ladder body, and a central portion in a longitudinal direction of the holding member is pivotally attached to the locking hook. The holding member is provided with a spring member that is rotatable between a locking position where the locking hook is hooked and locked to the stopper and a storage position where the locking hook is disengaged from the stopper, and biases the locking hook to the locking position. The upper portion of the holding member is connected to the upper end of the holding member, and a projection is provided at the upper portion of the holding member, against which the cord is abutted in the storage position, and biases the locking hook to the storage position against the spring force of the spring member. If the cord supporting the ladder body in the posture is cut for some reason The force for holding the holding member in the storage position by the cord is released, the holding member is rotated by the spring member, the locking hook of the holding member is hooked and locked by the stopper, and the ladder body is suspended in the room. Therefore, it is possible to provide a highly safe ceiling storage ladder while ensuring safety in the storage posture.

[Brief description of the drawings]

FIG. 1 is a perspective view of an extended position showing one embodiment of the present invention.

FIG. 2 is a partial perspective view showing an arrangement state of the holding member according to the first embodiment.

FIG. 3 is a partially broken side view of the same.

FIG. 4 is a partially broken side view showing the storage state of the above.

FIG. 5 is an enlarged sectional view of the same.

FIG. 6 is an explanatory diagram illustrating a storage mechanism according to the embodiment.

FIG. 7 is a partially broken perspective view showing an arrangement state of the belt cover according to the first embodiment.

FIG. 8 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ladder body 40 Cord body 50 Holding member 52 Locking hook 53 Projection body 70 Stopper 80 Spring member

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Daisuke Hozumi 2-1-1, Nishishinjuku, Shinjuku-ku, Tokyo Sanwa Shutter Industry Co., Ltd. (56) References JP-A-52-44699 (JP, A) Opened Sho 61-95841 (JP, U) Opened Sho 63-162799 (JP, U)

Claims (1)

(57) [Claims] A ladder body is provided with a cable body which is transformed into a storage position in which the ladder body is stored in an opening of a ceiling and a hanging position which hangs down from the ceiling, and a holding member provided with a locking hook at a lower end is opened. The ladder body is provided with a stopper provided on the ladder body and provided with a locking hook provided on the holding member. A spring member for urging the locking hook to the locking position and a spring member for urging the locking hook to the locking position is connected to the upper end of the holding member, and the storage position is set. A ceiling storage ladder, wherein a projection is provided on an upper portion of the holding member, the projection being biased to the storage position against the spring force of the spring member by abutting the cord.