JPS6340917B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is designed to be foldable, easy to store and
The present invention relates to a stepladder device that maintains an extremely stable upright state through point support and allows the user to stand upright close to an object.

Conventionally known stepladders have a structure in which one end of two ladder parts is rotatably connected and the other end is left open in an eight-shape to stand on its own, allowing the user to climb onto the steps and perform various tasks. be. However, with such conventional stepladders, when washing a car, especially a tall wagon, waxing, or caring for plants such as pine trees, one ladder part that opens in a figure eight shape is attached to the car body or tree trunk. The stepladder becomes a hindrance and cannot be approached in a perpendicular position, so the stepladder has to be brought close to the car body and the tree trunk parallel to the tree trunk. Not only was it easy to topple over, making it impossible to work properly, but the risk of an accident was also very high.

The present invention was invented focusing on the above points, and has a structure in which a vertical support part is rotatably attached to the upper end of the ladder part, and a leg member is rotatably attached to the lower end of the ladder part. By adopting this, it is possible to fold and store with a simple operation, and the lower end of the vertical support part is fixed in position approximately in the center of the leg member 8, so that the tip of the leg member and the base end of the ladder part are connected to each other. 4
By providing point support, you can get close to the car body or tree trunk when washing a car, especially a tall wagon, waxing it, or caring for plants such as pine trees, making the work very easy. Yes, and 4
The object of the present invention is to provide a stepladder device that is safe due to point support and has no risk of accidents such as the stepladder falling over.

An embodiment of the present invention will be described below based on the accompanying drawings.

1 is a stepladder device according to the present invention, which includes one ladder portion 2
have. The ladder section 2 is composed of a pair of parallel long pillars 3, 3 and a plurality of step stools 4 horizontally suspended between the long pillars 3, 3 at appropriate intervals. Reference numeral 5 denotes a vertical support part rotatably attached to the upper end of the ladder part 2, and the elongated column body 3,
It is composed of a pair of parallel vertical columns 6, 6 which are rotatably attached to the upper ends of each frame 3, and a reinforcing rod 7 horizontally suspended between the vertical columns 6, 6. A leg member 8 is rotatably mounted at a position slightly above the lower end of the ladder portion 2, and a leg member 8 is rotatably mounted at a position slightly above the lower end of the elongated column bodies 3, 3. It has a pair of parallel long pillar bodies 9, 9 and a reinforcing rod 10 horizontally suspended between the pillar bodies 9, 9.

Reference numerals 11 and 11 designate recesses provided on the upper surfaces of approximately central portions of the pillar bodies 9, 9, which receive the lower ends of the vertical supports 6, 6 in a state in which they are suspended approximately vertically downward. It can be screwed in from the side, and by screwing, the lower ends of the vertical supports 6, 6 are fixed within the recesses 11, 11 (FIG. 4). The positions of the recesses 11, 11 are not particularly limited, as long as they are provided at positions where the vertical supports 6, 6 are suspended substantially vertically downward.

In addition, the rubber crowns 13 fitted to the upper and lower ends of the long columns 3, 3 and the tips of the pillar bodies 9, 9 are designed to prevent scratches on the vehicle body etc. during car maintenance. This is what I did.

According to the configuration described above, when using the stepladder device 1, the leg member 8 is opened, the lower end of the vertical support 6 is fitted into the recess 11 of the column body 9, and screwed. As a result, the stepladder device 1 is in the state shown in FIG. It is possible to reach a close position, and by climbing up the ladder part 2, it is possible to easily care for the roof of a car and perform waxing. Also, to take care of plants such as pine trees,
The stepladder device 1 can be brought close to the pine tree by sandwiching the trunk of the pine tree between the pillar bodies 9, 9, and the plants can be easily taken care of. Moreover, since the stepladder device 1 is supported at four points by the lower ends of the long pillars 3, 3 and the tips of the pillars 9, 9, it is extremely stable. The tip portions of the pillars 3, 3 go into the ground to the base ends of the pillars 9, 9, and are supported extremely stably by four-point support. After use,
If the screws 12 are removed and the vertical support part 5 and leg members 8 are folded as shown in FIG. 3, they can be stored without getting in the way.

The installation positions of the recesses 11, 11 are as follows:
Although an example is shown in which the vertical support 6,
6 can be supported in a substantially vertical state, and there are no restrictions on the installation position. For example, if the recesses 11, 11 are provided at the tips of the pillar bodies 9, 9 with the dimensions of each member shown, the vertical pillars 6, 6 will be installed obliquely,
As will be described later, the lower ends of the vertical struts 6, 6 pose an inconvenience in that they become a hindrance when attempting to insert the pillar bodies 9, 9 under the vehicle body.

In the above-described embodiment, a means for fixing the vertical support 6 by screwing it into the recess 11 of the pillar body 9 was shown, but it goes without saying that other known means can be adopted. For example, as shown in FIG. As shown, if the guide groove 14 is provided from the base end to the center of the leg member 8, and the guide protrusion 15 provided at the lower end of the vertical support 6 is slidably inserted into the guide groove 14, the stepladder device 1 In the open state, the lower end of the vertical support 6 is located at the center of the pillar body 9 and will not fall off, and when not in use, it will continue to move inside the guide groove 14 into the guide protrusion 15.
It can be folded by sliding it.
Note that although the illustrated example shows a case where the guide groove 14 is provided on the upper surface of the pillar body 9, the guide groove 1
4 on the side surface of the pillar body 9, that is, on the inner surface or the outer surface, the same effect can of course be obtained.

Furthermore, in order to increase the safety of the stepladder device 1, the pedestals 9, 9 may be changed from a parallel state to a fan-shaped state, or the tips of the pedestals 9 may be bent outward while remaining parallel. Further, the lower end portions of the elongated columns 3, 3 may be bent outward in the same way, and it is also possible to employ these modes in combination.

In the above embodiment, the leg member 8 was rotatably attached to the lower end of the ladder part 2, but the point is that the vertical supports 6, 6 only need to be supported and fixed. For example, as shown in FIG. As shown, it is also possible to support and fix the vertical column 6 by rotatably providing the column body 9 at the lower end of the vertical column 6. However, in the case of such a configuration, the rotation of the ladder portion 2 and the vertical support portion 5 may be restricted by, for example, connecting the ladder portion 2 and the vertical support portion 5 with a chain of a predetermined length. Of course, it is necessary to restrict the position to a predetermined position by some means.

There is no particular restriction on the material of each member of the stepladder device 1, but in order to make it easy to carry, it is preferable to use a light material such as aluminum and to make each member hollow as shown in FIG.

As described above, the present invention employs a configuration in which the vertical support part is rotatably attached to the upper end of the ladder part, and the leg member is rotatably attached to the lower end of the ladder part. It is possible to fold and store with a simple operation, and the lower end of the vertical support part is fixed in position approximately in the center of the leg member, and four-point support is provided by the tip of the leg member and the base end of the ladder part. Therefore, when washing a car, especially a tall wagon, waxing, or caring for plants such as pine trees, it is possible to get close to the car body or tree trunk, making it very easy to work, and with four-point support. This has an unprecedented and significant effect in that it is safer and there is no risk of accidents such as the stepladder falling over.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a side view of the same as above, FIG. 3 is a side view showing the stepladder of the present invention in a folded state, FIG. 4 is an enlarged cross-sectional view of the main parts of the above, and FIG. An enlarged sectional view of the main part and FIG. 6 are side views showing the main part of another embodiment of the present invention. 1: Stepladder device, 2: Ladder part, 3: Long column body,
5: Vertical support part, 6: Vertical support, 8: Leg member,
9: Pillar body, 11: Recess, 14: Guide groove, 15:
Guide protrusion.

Claims (1)

[Scope of Claims] 1. Consisting of a pair of parallel long pillars 3, 3 and a plurality of step stools 4 horizontally suspended between the long pillars 3, 3 at appropriate intervals, and diagonally Ladder section 2 to be installed
and a vertical support part 5 consisting of a pair of parallel vertical columns 6, 6 whose upper ends are rotatably connected to the upper ends of the elongated columns 3, 3 and which are suspended substantially vertically downward; A leg member 8 consisting of a pair of parallel long leg columns 9, 9 whose base end portions are rotatably attached at a position slightly above the lower ends of the long column bodies 3, 3. Has a foldable structure,
Approximately at the center of the long pillar bodies 9, the vertical support 6,
6. A stepladder device characterized in that the lower ends of the elongated pillars 3, 3 are fixed in position, and stable four-point support is provided by the lower ends of the elongated pillars 3, 3 and the tips of the elongated pillars 9, 9. 2. Claim 1, characterized in that a recess 11 is provided approximately at the center of the leg member 8, and the lower end of the vertical support portion 5 can be fitted and fixed into the recess 11. stepladder device. 3. A guide groove 14 is provided from the base end to the center of the leg member 8, and the vertical support portion 5 is provided within the guide groove 14.
The stepladder device according to claim 1, wherein the lower end portion of the stepladder device is slidably inserted.