JP3109748U - Triangular pyramid stepladder - Google Patents

Abstract

When installing a stepladder, even if there is a single irregularity on the floor surface, the stepladder does not shake and the worker can work with peace of mind.
SOLUTION: When two legged ladder frames with a narrow upper part and a wide lower part are attached with hinges 7 so that the legs are opened with the diagonal pedestal side as an axis, the legs are opened. Is a self-supporting triangular pyramid-shaped stepladder, and the two legs connected by hinges are installed on the front, and the steps 5 and 6 of the left and right ladder frames are alternately stepped on with the feet while straddling the legs. When working, tighten the pedestal with both the knees of the worker to stop the body from shaking and to carefully carry out detailed work, including work on the top step board of the stepladder.
[Selection] Figure 1

Description

  The present invention can stably install the stepladder even on the floor with some unevenness, and the operator can work with peace of mind even if there is no assistant by stopping the shaking of the body by tightening the pedestal with both knees It is about what can be done.

  Since the conventional stepladder is a four-point support stepladder, if there is a single irregularity on the floor surface, the stepladder will not be stable and the operator could not work with peace of mind.

  In the conventional stepladder, since the worker is merely standing on the stepping plate of the stepladder, the body is shaken and it is difficult to work in detail.

  The problem to be solved is that when the stepladder is installed, even if there is a single irregularity on the floor surface, the stepladder does not shake and the worker can work with peace of mind.

  When an operator works on a stepladder, there is no shaking of the body and detailed work can be performed carefully.

  This invention is a triangular pyramid that can stand on its own when it is opened by attaching the pedestal and the pedestal with a hinge so that two triangular ladder frames with a narrow upper part and a wide lower part are opened with the diagonal pedestal side as the axis. The two legs connected by hinges are installed in the front, and the left and right ladder frame steps are alternately stepped on with the legs while straddling the legs. When working, the pillars are tightened with both knees on each step tread, so that the body stops shaking, including on the top tread, and the operator releases both hands carefully. The main feature is that work can be performed safely.

  The triangular pyramid type stepladder of the present invention works as a three-point support, and the stepladder can be easily installed even on an uneven floor surface. The stepladder does not shake and the operator can get on and off with peace of mind. And when getting on and off, the two pillars between the two legs are held with both hands while straddling the ridge of the triangular pyramid, and the left and right footboards are alternately stepped on, so girls and elderly people can use it with peace of mind. can. Also, when you work, tighten the pedestal between your feet with your knees to stop the shaking of the body and perform detailed work with both hands. And even when standing on the top stepping plate of the stepladder, there are two pedestals that are lined up between the operator's feet, so the pedestal can be tightened with both knees as in the case of the lower step, and the body shakes. There is no need to worry about detailed work. And, the horizontal frame at the top of the triangular frame is a place to catch tools when working, so workers can work safely with only the necessary tools and materials. The next best thing is to attach two long and short connecting rods to one pedestal where the stepladder is open, so that the two stepladders are on the back, and position the two connecting rods on the other pedestal. By adjusting and connecting, the two stepladders can be united and a strong scaffold can be made immediately. This is an outdoor work with many irregularities, which is not an effect of conventional stepladders.

  As the two ladder frames with a narrow upper part and wide lower part are opened with the diagonal pedestal side as the axis, the pedestal and the pedestal are attached with hinges. To get on and off, the two pedestals connected by hinges are installed with the front side facing the front, and the treads of the left and right ladder frames are alternately stepped on with the feet while straddling the two pedestal columns that are the ridgelines of the triangular pyramid. Next, this triangular pyramid-shaped stepladder is configured not to get on and off from the ladder surface of the stepladder like a conventional stepladder, but to get on and off the ridgeline of the triangular pyramid, so the front of the stepladder is not a ladder surface. Therefore, in order not to mistake the front where the stepladder gets on and off, human left foot type and right foot type are attached to the surface of the left and right treads, even if there is no instruction manual for stepladder, straddling the pedestal which is the ridgeline of the triangular pyramid, The front position to get on and off the stepladder is clearly indicated so that the stepladder to get on and off can be understood immediately. Next, the top horizontal rails of the left and right triangular ladder frames do not attach treads, hook tools that are not used in the immediate work, and work with only the necessary tools and materials. Also, the two pillars in front of the stepladder are used to perform the work safely even if the operator releases both hands when the operator tightens with both knees to stop the shaking of the operator's body. To do. Next, attach two long and short connecting rods to one pedestal on the side where the stepladder is opened, and install the two stepladders so that they face each other. By connecting and adjusting the position, the two stepladders are united so that a strong scaffolding that does not fall forward, backward, left and right can be created.

  Fig. 1 is a front view of a state where the operator tightens the pedestal with the knees of both legs when standing on the uppermost step board of the triangular pyramid stepladder, and Fig. 2 stands on the uppermost step board of the triangular pyramid stepladder. 3 is a side view of an operator's both-legs knee position, FIG. 3 is a front view of a triangular pyramid stepladder, and FIG. 4 is a plan view of a triangular pyramid stepladder. Attach the pedestal (1) and pedestal (2) with a hinge (7) so that the two ladder frames with a narrow upper part and a wide lower part open with the diagonal pedestal side as the axis. Is a stepladder with a triangular pyramid that can stand on its own, and the two ladders connected by hinges (7) are installed on the front, and the ladders on the right and left are straddled across the two pillars that are the ridgelines of the triangular pyramid. Step on the treads (5) and (6) of the frame alternately with your feet. Next, this triangular pyramid-shaped stepladder is configured not to get on and off from the ladder surface of the stepladder like a conventional stepladder, but to get on and off the ridgeline of the triangular pyramid, so the front of the stepladder is not a ladder surface. Therefore, in order not to mistake the front where the stepladder gets on and off, the left foot type (14) and the right foot type (13) of human beings are attached to the surfaces of the left and right treads (5), (6) The front position of getting on and off the stepladder is clearly shown so that it can be easily understood that it is a stepladder to get on and off while straddling the pillars (1) and (2) that are the ridgelines of the triangular pyramid. Next, the top horizontal rail (8) of the left and right triangular ladder frames does not have a tread board, and hooks tools that are not used in the work to be performed immediately, and works with only the necessary tools and materials. In addition, the two pedestal columns (1) and (2) in front of the stepladder stop the operator's body from being shaken by the operator tightening with both knees, and the operator can safely work even if both hands are released. Used for implementation. This also applies to work on the top tread. With conventional stepladders, there were many accidents that would cause the top board to stand up and crash, which was an important issue in field work safety. Next, two long and short connecting rods (15) and (16) are attached to one pedestal (3) on the side where the stepladder is opened, and the two stepladders are installed so as to be in the back, By connecting the two connecting rods (15) and (16) to the opponent's pedestal while adjusting the height and direction, the two stepladders are integrated into a strong scaffold that does not fall forward, backward, left or right.

  Because the present invention is a three-point support stepladder, even if it is a little uneven floor, it will not rattle, and if the pedestal is tightened with both knees, the operator's body will stop shaking, and detailed work will be done with peace of mind Can be implemented. Therefore, it is not necessary for the assistant to hold the stepladder like the conventional four-point support stepladder, and it can be used with peace of mind in ordinary homes where girls and the elderly live. Also, at construction sites with many irregularities on the floor surface, triangular pyramid stepladders are often used instead of the conventional four-point support stepladders that do not fall back and forth but fall right and left. In addition, the strong scaffolding of two stepladders with connecting rods has great utility as a convenient instant scaffolding, making it a remarkable stepladder in civil engineering and landscaping fields where there are many outdoor tasks.

The front view of the state which tightens a pedestal with the knee of an operator's both legs when standing up on the top step board of the triangular pyramid type stepladder of the present invention. The side view of the knee position of an operator's both legs when standing up on the top step board of the triangular pyramid stepladder of the present invention. The front view of the triangular pyramid type stepladder of this invention. The top view of the triangular pyramid type stepladder of this invention. Top plan view of the stepladder when the triangular pyramid stepladder of the present invention is opened The stepladder bottom plan view when the triangular pyramid stepladder of the present invention is opened. The side view when two legged pyramid-shaped stepladders of the present invention are installed on the back, and the two legs are connected with a connecting rod. The top view at the time of connecting the two legs with the triangular pyramid-shaped stepladder of this invention, two each installed in the back, and a connecting rod. The side view of the state connected with the connecting rod of the triangular pyramid type stepladder of this invention. Sectional drawing of the state connected with the connecting rod of the triangular pyramid type stepladder of this invention.

Explanation of symbols

1 Right pedestal on the front side of the stepladder.
2 The left pedestal on the front side of the stepladder.
3 The right pedestal on the open leg side of the stepladder.
4 The left pedestal on the open leg side of the stepladder.
5 The right tread of the ladder frame.
6 The left tread of the ladder frame.
7 Hinge.
8 The top horizontal rail of the right ladder frame.
9 The top horizontal rail of the left ladder frame.
10 Worker.
11 Worker's feet.
12 Open the stepladder.
13 Right foot type.
14 Left foot type.
15 Connecting rod (long)
16 Connecting rod (short)
17 Pin for connecting rod.

Claims (1)

1 Triangular pyramid shape that allows two ladder frames with a narrow upper part and a wide lower part to be opened independently with the hinges attached to the pedestal and pedestal so that the legs are opened around the diagonal pedestal side. Stepping on and off is done by placing the two pedestal sides connected by hinges with the front as the front, and stepping on the left and right ladder frame steps alternately with your feet while straddling the pedestal.
2 Attach human left and right foot types to the surface of the left and right footboards so that you can immediately see that you are stepping on and off while straddling the pillars that are the ridgelines of the triangular pyramid, even if there are no instructions for using a stepladder. Clearly indicate the front position to get on and off the stepladder.
3 The top horizontal rails of the left and right triangular ladder frames are used for hooking tools used during the stepladder work without attaching treads.
4 The two pedestal columns in front of the stepladder are locked with both knees when the operator works, so that the operator's body stops shaking. Use to implement.
5 Attach two long and short connecting rods to one pedestal on the side where the stepladder is opened, install the two stepladders so that they are facing each other, and place the two connecting rods on the other pedestal By connecting the two stepladders, the two stepladders will be integrated into a solid instant scaffolding.
A stepladder consisting of the above structure.

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