JPH0524799Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention attaches auxiliary legs to the main legs of various types of ladders that are commonly used, and prevents the ladders from falling or slipping from side to side, front and back, and safely. This invention relates to a ladder with non-slip auxiliary legs that can be used.

(Prior Art) As is well known, a typical ladder is assembled with a pair of corresponding main legs and a number of lateral footrests. When using this product indoors or on the street, if the ground surface is flat and does not slip or deform, there will be no problem with it falling over. When the ladder is propped up against the ground, it is prone to slipping laterally, and in places where the ground surface is not flat, it is impossible for both main legs to provide even support, causing the main legs to sink into the ground and cause the ladder to become unbalanced. This poses a great danger if lost. Therefore, there is a drawback that it is impossible to use the device freely and safely at all times in such a place.

(Problems that the invention attempts to solve) In order to solve the above conventional drawbacks, this invention
Instead of an unstable ladder with only the corresponding main legs, by installing opening/closing auxiliary legs on the side of the main legs, it is possible to prevent the ladder from tilting in one direction, overturning, and the lower end of the main legs. The purpose is to reliably prevent slipping.

(Means for Solving the Problems) The ladder with anti-slip auxiliary legs of this invention solves all of the above-mentioned problems. It is constructed with a pair of opening/closing auxiliary legs, and guide receiving fittings 3 each having an opening 6 formed in the vertical direction are fixed to the sides of the main legs 2, 2. A projection screw 9 provided with a sliding fitting 8 is slidably inserted into the guide receiving fitting 3. A wing nut 10 or the like is screwed into the projection screw 9. The above purpose is achieved by attaching a fixed piece 11 provided with a rotating part 14 to the opening/closing auxiliary legs 5, 5 and opening/closing and rotating the main legs 2, 2. .

(Embodiment) Next, an embodiment of this invention will be described with reference to the drawings. The ladder main body 1 shown in FIG. ,2
It is constructed by installing several steps of footrests 4, 4... inside. The main legs 2, 2 are provided with guide fittings 3 of appropriate dimensions in the vertical direction on the left and right sides thereof. This guide receiving fitting 3 has a hollow portion 7 formed inside in the longitudinal direction, and a longitudinal opening 6 on the side.
has been drilled. A rectangular sliding fitting 8 that moves up and down is housed inside the guide receiving fitting 3. This sliding metal fitting 8 has a thread 9 formed on one side thereof to move up and down the opening 6. A wing nut 10 or the like, which can be manually operated, is screwed onto the projection screw 9. Next, the opening/closing auxiliary leg 5 that moves up and down on the guide fitting 3 has a substantially rectangular cross section, and has an opening/closing piece 13 fixed to its upper end, and a rotating part 14 is attached to the opening/closing piece 13. The fixing pieces 11 are connected together. This fixing piece 11 has the projecting screw 9
It has a structure in which a through hole 12 that fits into the hole 12 is bored. As shown in FIG. 2, the reference numeral 15 indicates a stopper that stops the opening/closing auxiliary leg 5 when it is folded when not in use, and the reference numeral 21 indicates a non-slip member. Moreover, when the opening/closing auxiliary legs 5, 5 are opened from the main legs 2, 2, spacing rods 20, 20 such as chains are installed between them.
Sometimes it spans over. Next, FIGS. 7 and 8 show other embodiments to which this invention is applied. Accordingly, second opening/closing auxiliary legs 16, 16 and third opening/closing auxiliary legs 17 of the same structure,
17 are attached to each. This is opened at the front and rear of the opening/closing auxiliary legs 5, 5 to stably support the front and rear of the main leg 2.

(Function) To explain how to use the ladder with auxiliary legs of this invention, to open it as shown in FIG. 1, loosen the wing nut 10 as shown in FIG. It descends inside the guide bracket 3. Simultaneously with the lowering of the sliding fitting 8, the opening/closing auxiliary legs 5 are also lowered, and the opening/closing auxiliary legs 5 are opened to the sides of the main legs 2, 2 at predetermined intervals as shown in the figure by the rotating part 14, and the four legs are opened at predetermined intervals as shown in the figure. Install and support it on the ground surface. Therefore, it is prevented from tilting to the left or right and falling over. Note that the opening/closing auxiliary legs 5, 5 in this case can be installed by rotating back and forth in response to the displacement of the terrain. Next, after use, the wing nut 10 is loosened, and as the sliding fitting 8 rises, the opening/closing auxiliary legs 5, 5 also rise and are folded along the main legs 2, 2 as shown in FIGS. 2 and 3. be. Furthermore, as shown in FIG. 7, when used, the second opening/closing auxiliary legs 16, 16 and the third opening/closing auxiliary legs 17, 17
By operating as described above, each leg can be freely opened and touched on the ground in the front and back directions, and can be sufficiently supported even when tilting in the front and back direction.

(Effects of the invention) Since this invention has the above-mentioned configuration, it has the effect that it can be used safely and reliably without falling or tilting to the left or right or backwards like a conventional ladder supported by two legs. Even when the ground surface is not flat, a total of four legs can be safely supported on the ground surface by installing each of the opening/closing auxiliary legs at different angles back and forth. and,
By fixing the rear guide bracket to the side of the main landing gear, the opening/closing auxiliary legs and the sliding bracket can be slid up and down extremely easily, which has the effect of allowing the opening interval of the opening/closing auxiliary legs to be freely selected. The guide bracket has the excellent effect of sufficiently reinforcing the main leg, strengthening the leg portion, and preventing deformation and bending as much as possible. In addition, a projecting screw equipped with a sliding fitting was slidably inserted into the guide receiving fitting, and a wing nut was screwed onto this projecting screw.
The nut screwing operation and assembly are extremely easy, and the sliding metal fittings can be moved up and down reliably. Furthermore, the rotating part provided at the upper end of the opening/closing auxiliary leg and the fixed piece provided with the through hole allow the opening/closing auxiliary leg to be opened and closed easily and reliably, and the through hole of the fixed piece can be rotated. Therefore, the opening/closing auxiliary legs have the very convenient effect of being able to be moved not only to the left and right, but also to the front and back by changing the angle freely. Furthermore, as shown in Figure 7, the second
By using the third opening/closing auxiliary leg, there are great effects such as being able to stand vertically.

[Brief explanation of the drawing]

Fig. 1 is a front view of the embodiment of this invention, Fig. 2 is a side view, Fig. 3 is a vertical side view with a part cut out, Fig. 4 is a slope view of the upper part of the opening/closing auxiliary leg, and Fig. 5 is a side view of the embodiment of this invention. The figure is a slope view of the sliding fitting, FIG. 6 is a slope view of the guide receiving fitting with a part cut out, FIG. 7 is a front view showing another embodiment, and FIG. FIG. Code: 1 is the ladder body, 2 is the main landing gear, 3
is a guide bracket, 5 is an opening/closing auxiliary leg, 6 is an opening, 8
is a sliding metal fitting, 9 is a screw, 10 is a butterfly nut, 11
12 is a fixed piece, 12 is a through hole, 13 is an opening/closing piece, and 14 is a rotating part.

Claims (1)

[Scope of utility model registration request] In a ladder with anti-slip auxiliary legs consisting of a pair of corresponding main legs and at least one pair of opening/closing auxiliary legs attached to the main legs, a guide bracket having a vertical opening in the side surface of the main legs is provided. A projection screw provided with a sliding metal fitting is slidably inserted into the guide receiving metal fitting, a wing nut is screwed onto the projection screw, and the opening/closing auxiliary leg is provided with a rotatable screw at the upper end. 1. A ladder with anti-slip auxiliary legs, characterized in that a fixing piece is attached, the fixing piece is provided with a through hole, and the through hole is fitted into the projection screw.