JPS5830958Y2 - mounting ladder - Google Patents

Description

[Detailed description of the invention] This invention consists of a mounting ladder, more specifically, the girders on both sides of the ladder main body, which are rotatably attached to a frame that constitutes a ceiling opening by a shaft, either directly or via an appropriate mounting bracket. A ladder body, a protruding piece having a rotating body at its tip, which is attached to the side girder of the main body of the ladder so as to protrude by an appropriate dimension, and one end thereof is attached to the side surface of the frame of the ceiling opening via an appropriate mounting bracket. The present invention relates to a mounting ladder comprising a plate spring body, the rotating body being elastically pressed against the plate spring body.

Conventionally, in the case of a mounting ladder, the ladder body is rotatably mounted on a shaft to a frame that constitutes a ceiling opening, and the lower end of the ladder is latched to the opening frame with an appropriate locking fitting, etc., and the ladder body is attached to the ceiling opening. Ladders with a structure that is stored inside a room or under the ceiling are used, but when using a ladder of this type, removing the locking metal fittings will cause the ladder to suddenly collapse due to its own weight. It was not safe because it rotated and descended.

For this reason, the ladder body and the opening frame are connected with a coil spring,
A structure has been proposed in which the ladder body is held in the ceiling opening or in the ceiling by the tension of the coil spring to prevent the ladder body from dropping suddenly when the ladder is used. However, when used for a long period of time, the tension of the coil spring deteriorates, and as a result, it is difficult to hold the ladder body horizontally within the ceiling opening or above the ceiling for a long period of time. In addition, if a lid corresponding to the ceiling opening is placed behind the ladder, the coil spring must be replaced with one with a larger repulsive force depending on the weight of the lid. This has the disadvantage that the installation work is complicated.

The present invention was developed in view of the drawbacks of the conventional proposals mentioned above, and when the ladder body is not in use, the ladder body is installed in the ceiling opening or
To provide a mounting ladder that can be stored in the ceiling, is easy to handle, and is safe.

Next, the present invention will be explained according to the drawings which are examples.

In FIGS. 1 to 5, 1 is a ceiling, 11 is a ceiling joist, and 12 is a ceiling finishing material.

2 is a ceiling opening, and the ceiling opening 2 is composed of a vertical frame 21 and a horizontal frame 22.

3 is a ladder body, and the ladder body 3 includes a ladder main body 31 and an auxiliary ladder body 3.
2, the side girders 33 and 34 of the ladder body 31 are slidably connected by a pair of L-shaped connecting fittings 35 and 35' to form a telescopic structure, and the both side girders 33 and 33 of the ladder main body 31 are connected to the shaft 3.
6, it is rotatably attached to the horizontal frame body 22 constituting the ceiling opening 2.

That is, the ladder body 3 slides the auxiliary ladder body 32 upward to overlap the main ladder body 31, and then rotates around the shaft 36 to move into the ceiling opening 2 or through the ceiling opening 2 to the attic. It is designed so that it can be stored in.

Reference numeral 37 denotes a locking metal fitting provided on the lowest rung 38 of the auxiliary ladder body 32, and the locking metal fitting 37 connects the auxiliary ladder body 32 to the ladder main body 31.
After being superimposed on the ladder main body 31, it is engaged with the lowest rung 38' of the ladder main body 31 to prevent the auxiliary ladder body 32 from sliding down under its own weight.

39 is a handrail provided on the ladder main body 31. Reference numeral 4 denotes a lid whose surface is covered with a ceiling finishing material 12, one end of which is connected to the vertical frame 21 of the ceiling opening 2 with a hinge or the like 41, and the other end of which is connected to the ladder main body 31 with a bar-shaped connecting fitting 42. They are rotatably connected.

Reference numeral 5 denotes a protruding piece having a rotating body 51 made of a metal roller or the like at its tip, and the protruding piece 5 is connected to the rotating shaft 36 of the ladder main body 31.
Screws etc. 52 are made to protrude appropriately below the side girder 33 in the vicinity.
It is fixed with

Reference numeral 6 denotes a leaf spring body made of a steel plate or the like, the lower end of which is held between protective plates 61 and 62 made of cast metal or the like, and the pin 6
3, the lower end of the protection plate 62 is rotatably and integrally attached between both side walls 65, 65 of a roughly U-shaped mounting bracket 64, and the protrusion of the ladder main body 31 is mounted via the mounting bracket 64. It is attached to the inner surface of the horizontal frame body 22 of the ceiling opening 2 located below the piece 5 with screws 66 or the like.

The leaf spring body 6 is supported from behind via the protective plate 62 by a screw 66 screwed into a nut-shaped screw hole 68 integrally provided in the back wall 67 of the mounting bracket 64, and is attached to the upper end thereof. The rotating body 51 of the protruding piece 5 provided on the ladder main body 31 is elastically pressed to cause a curved deformation.

That is, the rotating body 51 is elastically pressed against the upper end of the leaf spring body 6, and the reaction force is applied to the tip of the protruding piece 5 of the ladder body 3 to move the ladder body 3 into the ceiling opening 2 or behind the ceiling. This is to hold it horizontally.

Next, the operation of the mounting ladder having the above configuration will be explained.

As described above, in the mounting ladder of the present invention, even if the ladder body 3 is not locked to the frame body of the ceiling opening 2 with a locking fitting or the like, the ladder body 3 can be attached to the ceiling opening by the reaction force of the plate spring body 6. Since the ladder body 3 is held horizontally within the ceiling opening 2 or above the ceiling, the ladder body 3 will not rotate due to its own weight and come down from the ceiling opening 2.

Also, when the lower end of the ladder body 3 is pulled down from the ceiling opening 2 and rotated, the protruding piece 5 of the ladder body 3 rotates about the shaft 36 as the ladder body 3 rotates. Then, the tip of the protruding piece 5 presses the leaf spring body 6 via the rotating body 51,
Since the reaction force of the leaf spring body 6 acts on the tip of the protruding piece 5 via the rotating body 51, the ladder body 3 does not suddenly rotate and descend due to its own weight.

That is, when rotating the ladder body 3, as the protruding piece 5 of the ladder body 3 rotates, the rotating body 51 provided on the protruding piece 5 rotates.
presses the surface of the leaf spring body 6 while rotationally moving toward the upper end, so that the line of action connecting the contact point of the rotary body 51 with the leaf spring body 6 and the center of the rotary body 51 is the fourth While the ladder body 3 is located on the left side in the figure, even if the ladder body 3 is rotated, the reaction force of the leaf spring body acts in a direction that resists the rotation of the ladder body 3, so the ladder body 3 suddenly moves. It does not rotate and descend.

Further, when the lower end of the ladder body 3 is lowered from the ceiling opening 2 and rotated to lower it to the lower floor surface, the contact point with the leaf spring body 6 moves as the rotating body 51 rotates. , since the line of action is on the right side of the shaft 36, the reaction force of the leaf spring body 6 acts on the protruding piece 5 via the rotating body 51 in a direction that presses the lower end of the ladder body 3 against the floor surface of the lower floor. Therefore, it is possible to hold the ladder body 3 in a stable state on the floor surface,
It is safe and easy to handle.

In addition, the mounting ladder of the present invention is rotatably mounted by supporting the lower end of the leaf spring body 6, supporting it with a screw 69 provided on the back, and rotating the screw 69. Since the support point is displaced and its inclination angle can be adjusted freely, when the cover body 4 is installed behind the ladder body 3, the inclination angle of the leaf spring body 6 can be adjusted by rotating the screw 69. However, since it is possible to adjust the angle to obtain a reaction force corresponding to the increase in weight of the ladder body 3 caused by providing the lid body 4 and to hold the lid body 4 on the same plane as the ceiling surface, it is possible to adjust the angle according to the weight. Therefore, it is not necessary to replace the leaf spring body 6, and the construction is very easy.

Although the position of the protruding piece 5 in the mounting ladder of the present invention is not limited, it is preferable to provide it near the rotating shaft 36 of the ladder main body 31, since it is necessary to use a plate spring body 6 having a large repelling force. It is very preferable.

Further, the mounting ladder of the present invention may be one in which the rotation shaft 36 of the ladder main body 31 is provided outside the side girder of the ladder body 3, and the protruding piece 5 and the leaf spring body as shown in FIGS. 6 and 7. The mounting bracket 64 may be connected to the side wall 65' of the mounting bracket 64 by the shaft 36 and rotatably attached to the vertical frame 21 of the ceiling opening 2 via the mounting bracket 64.

As is clear from the above explanation, the mounting ladder of the present invention is
In addition to providing a protruding piece with a rotating body in the ladder body side surgery,
Since the protruding piece is elastically pressed by a leaf spring body provided on the ceiling opening frame body through a rotating body, the ladder body is horizontally moved inside the ceiling opening or above the ceiling by the reaction force of the leaf spring body. Even when descending, the ladder body can be safely lowered without falling suddenly from the ceiling opening due to its own weight.

Also, when the lid body etc. is connected to the ladder body and provided,
By adjusting the inclination angle of the leaf spring body according to the weight of the lid body, it is possible to hold the ladder body horizontally, so the weight of the lid body is not limited, and it can be used as a finishing material for ceilings. Since the surface finish of the lid body can be adapted accordingly, the construction is easy without spoiling the aesthetics of the room, and the handling is simple and there is no danger.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the mounting ladder according to the present invention, Fig. 2 is a partial perspective view showing the connected state of the ladder main body and the auxiliary ladder body in Fig. 1, and Fig. 3 is the same as Fig. 1. 4 is an enlarged view showing the main parts of the mounting ladder in FIG. 1, and FIG. 5 is a leaf spring body and its mounting bracket in FIG. 1. FIG. 6 is a side view showing another embodiment, and FIG. 7 is an enlarged view showing essential parts of the mounting ladder in FIG. 6. 1...Ceiling, 2...Ceiling opening, 3.
...Ladder body, 4...Lid body, 5...
・Protruding piece, 6...Plate spring body, 21°22...
... Frame body, 31 ... Ladder main body, 32 ...
... Auxiliary ladder body, 33.34 ... String girder, 36.
...Shaft, 42...Connection fittings, 51...
...Rotating body, 61.62...Protection plate, 63.
...Pin, 64...Mounting bracket, 68...
...screw hole, 69...screw.

Claims (4)

[Scope of utility model registration request] (1) A ladder body in which one end side of both side girders provided on the main body of the ladder is rotatably attached to a frame forming a ceiling opening by a shaft, and a rotating body attached below the axis of the side girder. When the ladder main body is in a horizontal state, the rotating body is pressed diagonally from below toward the other end of the ladder main body to prevent the ladder main body from rotating downward, and when the ladder main body rotates by a predetermined amount or more, A mounting ladder comprising: a leaf spring body having one end attached to the inner side surface of the opening frame body so as to bias the rotation; (2) The mounting ladder according to claim 1, wherein the plate spring body is attached so that its inclination angle can be freely adjusted. (3) Scope of utility model registration claims characterized in that the ladder main body is rotatably attached to the opening frame by connecting the protruding piece provided on the ladder main body and the mounting bracket of the leaf spring body with a shaft. The mounting ladder described in paragraph 1 or 2. (4) Utility model registration claims Paragraphs 1 to 4, in which the ladder body is formed of a main ladder body and an auxiliary ladder body, and the girders on both sides of the ladder body are slidably connected by a pair of L-shaped connecting fittings. Mounting ladder as described in any of paragraph 3.