JP3018639U - Tripod stepladder - Google Patents

Abstract

(57) [Summary] [Structure] At least one of the multiple rods (3b)
Has a base frame (3) which is an outer peripheral grooved tube in which grooves are formed between a large number of ridges provided at substantially equal intervals in the length direction of the outer peripheral surface, and the upper end is attached to the base frame. And a pair of left and right leg rods (2) (2) having a shape that is curved and expanded sideways as it goes downward and a reinforcing rod (a) attached to the left and right leg rods with upper ends attached to the underframe ( 4) One or both of (4) is the outer peripheral grooved pipe, and the front or front step frame (5a) is the outer peripheral grooved pipe with a space between the leg rod and the reinforcing rod. ~ (5f) attached ladder body (1)
And a support rod (9) whose upper end is rotatably attached to the underframe, the tripod stepladder. [Effect] According to the tripod stepladder of the present invention, it is possible to work safely without the hands and feet slipping during climbing up and down the stepladder or during work, and further, it is possible to slip during transportation of the stepladder. Absent.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tripod stepladder used in construction, orchard and other work.

[0002]

[Problems to be solved by conventional techniques and devices]

 Conventionally, tripod stepladders have been used in construction, orchard, and other work, but the legs and underframes, which are most often contacted by workers, such as gripping and supporting the body during work, and the scaffolding are generally smooth. It is composed of pipes and rods with various outer peripheral surfaces, and it was slippery during work, which was a safety issue.

[0003]

[Means for Solving the Problems]

 The present invention has been made in response to such a problem, and the leg rods and / or the reinforcing rods, the side rods of the tread frame and the underframe are constituted by the pipes with the outer peripheral groove, so that the worker is safe without slipping. It provides a metal tripod stepladder that can be used for.

[0004]

【Example】

 The present invention will be described 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 constituting the ladder body, each of which has a shape that is curved and expanded sideways as it goes downward, and its upper ends are respectively. It is attached to both ends of the horizontal rod (3a) at the front end of the rectangular frame (3). This underframe (3) is provided with one or more (two in the figure) horizontal rods (3b) (3b) at the center.

Reference numeral (4) is a reinforcing rod provided substantially parallel to the rear of each of the lever rods (2) and (2), the upper end of which is attached to the side rod (3c) of the underframe (3), and the lower end of which is the leg. It is attached to the lower end of each of the rods (2) (2). Reference numerals (5a) to (5f) are rectangular tread frames that are laterally bridged at a substantially equal interval between the pair of leg rods (2) and (2) and the reinforcing rods (4) and (4). At the center of the rear part of the tread frame (5f), a locking piece (6) is provided when the supporting rod (9) is closed.

Reference numeral (7) is a cleat attached to the lower ends of the leg rods (2) and (2) and the support rod (9), and (8) is a handle. (9) is a support rod of approximately the same length as the ladder body (1), the upper end of which is attached to the central part of the outer pipe (3d ') provided on the horizontal rod (3d) at the rear end of the underframe (3). It is rotatably connected to the horizontal rod (3d) and can be opened and closed. Further, a work footrest (10) is projected on the upper part of the support rod (9) so that it can also be used as a handle.

In the tripod stepladder configured as described above, the center rods (3b) (3b) of the leg rods (2) (2) and the underframe (3) and the tread frames (5a) to (5f). The front part (F) of () is constructed by using an outer peripheral grooved tube as shown in the figure. Further, in the present invention, the reinforcing rod (4) can also be an outer peripheral grooved pipe, and further the outer rod (3d ') of the horizontal rod (3a) at the front end of the underframe (3) and the horizontal rod (3d) at the rear end. Can also be a grooved tube. In addition, the side frame (3c) of the underframe (3) can be an outer peripheral grooved pipe, and the rear portions (R) of the treads (5a) to (5f) can also be outer peripheral grooved pipes. .

As an example of this outer peripheral grooved pipe (11), as shown in the partially enlarged view of FIG. 3, a large number of ridges (12) are arranged at substantially equal intervals in the length direction of the outer peripheral surface of a metal pipe such as aluminum. And grooves (13) are formed between them. The outer peripheral grooved tube is not limited to this, and may be any tube as long as a large number of grooves are provided on the outer peripheral surface of the tube to obtain the same effect. Therefore, the leg rods (2) and (2) and / or the reinforcing rods (4) and (4), the treads (5a) to (5f), and the horizontal rods (3b) of the underframe (3) formed by such a grooved outer peripheral tube. ) If using a tripod stepladder equipped with (3b) for work, you can work safely without gripping and supporting the body or slipping when using the tread frame or underframe as a scaffold, and climbing up and down the stepladder. The hands and feet do not slip when doing.

[0009]

[Effect of device]

 As described above, according to the tripod stepladder of the present invention, it is possible to work safely without the hands and feet slipping during climbing up and down of the stepladder or during work, and further, this slips during transportation of the stepladder. Never.

[Brief description of drawings]

FIG. 1 is a plan view showing an open state of an example of a tripod stepladder according to the present invention.

FIG. 2 is a side view of the same.

3 (a) and 3 (b) show an example of an outer peripheral grooved tube used for the leg rod of a tripod stepladder and the central rod of the underframe of the present invention, and (a) is a partially enlarged view thereof, (B) is an AA cross-sectional view in (a).

[Explanation of symbols]

 1 Ladder body 2 Leg rods 3 Underframes 3a, 3b, 3d Horizontal rods 3c Side rods 4 Reinforcing rods 5a to 5f Tread frames 9 Support rods 11 Outer grooved pipes 12 Protrusions 13 Grooves

Claims (1)

[Scope of utility model registration request] 1. A base in which at least any one of a plurality of horizontal rods is an outer peripheral grooved tube in which grooves are formed between a plurality of ridges provided at substantially equal intervals in a length direction of an outer peripheral surface. Has a frame,
A pair of left and right leg rods having an upper end attached to the underframe and being curved and expanded sideways as it goes downward, and a reinforcing rod provided along the left and right leg rods with the upper end attached to the underframe. One or both of the above-mentioned outer peripheral grooved pipes, and a ladder body to which a front or front and rear tread frame made of the outer peripheral grooved pipe is attached with a space between the leg rod and the reinforcing rod, and A tripod stepladder comprising a support rod whose upper end is rotatably attached to an underframe.