JPH0446080Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tripod pedestal used in construction, orchards, and other works.

[Conventional technology and its problems]

Traditionally, tripod stepladders have been used in construction, orchards, and other work, but the legs and underframes that workers come into contact with most often, such as by gripping them to support their bodies during work or as scaffolding, are generally smooth. It is made up of pipes, rods, etc. with a rough outer circumferential surface, and is slippery during operation, which poses a safety problem.

[Means for solving problems]

The present invention was developed in response to these problems, and by constructing the leg rods and the central rod of the underframe with tubes with grooves on the outer circumference, the present invention is a metal tripod stand that can be used safely by workers without slipping. It provides:

Example The present invention will be explained below with reference to the illustrated embodiments.

In the figure, 1 is a ladder body, and 2 and 2 are a pair of left and right leg rods, each of which has a shape that curves and expands laterally as it goes downward, and its upper end is a rectangular shape. It is attached to both ends of the front rod 3a of the underframe 3. This underframe 3 has one or more (two in the figure) central rods 3b, 3b attached to its center. 4 is a reinforcing rod provided approximately parallel to the rear of each of the leg rods 2, 2, and the upper end thereof is connected to the side rod 3c of the underframe 3, respectively.
The lower ends are attached to the lower ends of the leg rods 2, 2, respectively. 5a to 5f are rectangular stiles horizontally suspended at approximately equal intervals between the pair of leg rods 2, 2 and the reinforcing rods 4, 4, and the lowermost stile 5f
A locking piece 6 is provided at the center of the rear part of the support rod 9 when the support rod 9 is closed. Reference numeral 7 represents a non-slip member attached to the lower end of each of the leg rods 2, 2 and the support rod 9, and 8 represents a handle. Numeral 9 is a support rod having approximately the same length as the ladder body 1, and its upper end is attached to the center of an outer tube 3d' provided on the rear rod 3d of the underframe 3, and is rotatably connected to the rear rod 3d. The legs can be opened and closed.
Further, a working footrest 10 is protruded from the upper part of the support rod 9 and also serves as a handle.

In the tripod stand constructed as described above, the leg rods 2, 2 and the central rods 3b, 3b of the underframe 3 are constructed using outer peripheral grooved tubes as shown in the figure. As shown in the partially enlarged view of FIG. 3, an example of this outer grooved tube 11 is a metal tube made of aluminum or the like, with a large number of protrusions 12 provided at approximately equal intervals along the length of the outer circumferential surface of the tube. A groove 13 is formed therein.
Note that the outer circumferentially grooved tube is not limited to this, and any tube may be used as long as the same effect can be obtained by providing a large number of grooves on the outer circumferential surface of the tube.

Therefore, if you use a tripod stepladder with the leg rods 2, 2 and the central frames 3b, 3b of the underframe 3 made of tubes with grooves on the outer periphery for work, you will not be able to hold it to support your body or use it as a scaffold. You can work safely without slipping.

[Effect of idea]

As described above, with the tripod stand of the present invention, it is possible to work safely without slipping during work.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a tripod stepladder according to the present invention, showing the legs in an open state, Fig. 2 is a side view of the same, and Figs. It shows an example of an outer peripheral grooved tube used for the central rod of the frame, and A is a partially enlarged view thereof, and B is a sectional view taken along A-A in A. 1... Ladder body, 2... Leg rod, 3... Underframe, 3b
...Central rod, 4...Reinforcement rod, 5a to 5f...Step frame, 9...Support rod, 11...Periphery grooved tube, 12...
...projection, 13...groove.

Claims (1)

[Scope of utility model registration request] an underframe provided with a central rod consisting of one or more tubes in which grooves are formed between a large number of protrusions provided at approximately equal intervals in the length direction of the outer circumferential surface; The upper end is attached to the front rod of the stand rod, and the shape curves and expands laterally as it goes downwards, and is between a number of protrusions provided at approximately equal intervals along the length of the outer circumferential surface. A pair of left and right leg rods made of pipes with grooves formed therein, a reinforcing rod whose upper end is attached to the side rod of the underframe and provided along the left and right leg rods, and between the leg rod and the reinforcing rod. Consisting of a ladder body consisting of treads attached at intervals, and a support rod whose upper end is rotatably attached to the rear rod of the underframe and has a handle and work foothold on the upper part. A tripod stand featuring: