JP3100173U - Fall prevention holder for ladder - Google Patents

Abstract

An object of the present invention is to provide a ladder overturn prevention holder which can prevent a ladder from swaying, vertically swaying, tilting, etc. and perform a safe operation when electric work or the like is performed on a ladder on an iron pole.
When performing a ladder operation, the ladder is held on an iron pole S at two positions, an upper stage and a lower stage. And fix it with bolts. Similarly, the iron pole P is sandwiched by the band of the lower holder and fixed with bolts, and the hook is inserted into the frame F and fixed with bolts.
[Selection diagram] Fig. 1

Description

The present invention relates to a holder for preventing a ladder from overturning.

Conventionally, when performing laddering on a thin electric pole or iron pole (diameter 70 to 150 mm), etc., when two people work, one person can support the ladder, but repair or simple work In many cases, people often work alone, and the number of falls has increased year by year, which has been extremely dangerous.

Also, when working in places with poor scaffolding or places where aerial work vehicles cannot be used, safe work that cannot be fixed because there is no reliable and simple holder that prevents the ladder from swaying and swaying. Could not be done.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the conventional unstable ladder operation as described above, and to provide a safe and secure fall prevention holder for a ladder that can be easily and quickly mounted and removed by one person.

When working with a ladder on an iron pole, use two upper and lower holders at the upper and lower ladders to prevent horizontal and vertical tilting of the ladder.

In the method of fixing the holder to the iron pole, the iron pole is hung with a hinged steel strip, and it is fixed by tightening the surrounding bolts. The upper and lower tiers have the same structure.

Next, the method of fixing the holder to the ladder is as follows. First, the upper holder is formed with a U-shaped hinge type metal fitting at one end of an aluminum square pipe arm that is not easily deflected against lateral shaking. And secure with bolts. In addition, a hinge type steel strip for fixing an iron pole was integrally connected to a tip of the square pipe arm on the opposite side via a pin so as to be able to swing a little.

The retainer used for the lower part of the ladder is a square pipe with a bearing fixed to one end of the arm, a round bar is passed through the bearing, and the round bar is inserted into the bracket integrated with the hook and the arm is swung. Made it possible.

When attaching the lower holder to the ladder, the U-shaped bracket is inserted into the two frames of the ladder and fastened with bolts.

A hinge-type steel strip of the same type as that of the upper holder was fixed to the tip of the lower pipe holder on the opposite side of the square pipe arm, and the square pipe was formed to be extendable and contractible.

According to the present invention, when performing ladder work, the upper and lower ladders are fixed at two places, so that when the worker is performing the work, or when ascending and descending, it prevents horizontal and vertical tilt. , Very secure.

Since the upper and lower holders can be easily attached and detached, the work can be performed quickly. Also, it is possible to use a ladder on a thin tree or the like to fix the upper stage and the lower stage, and to use for pruning and pruning.

The present invention is very easy to handle when working on a ladder because it has a simple structure while achieving strength and weight reduction.

Hereinafter, embodiments will be described with reference to the drawings.
First, a pin 2 is passed through a tip of an arm 1 made of a square pipe of a holder (c) for an upper stage viewed from above shown in FIG. 2, and a band 3 made of a steel strip is fixed to be swingable. A hinge 4 for one-sided opening is pivotally mounted, and is fixed to a pole P with a bolt 6 connected by a squirrel 5. Further, a hook 7 is fixed to the other end of the arm 1, and the lid 8 is pivotally attached to the hook 4 together with the hinge 9, and is fixed to the step rod S with a bolt 10. The set bolt 11 is for preventing the lateral displacement of the arm 1.

Next, as shown in FIG. 3, an arm 12 formed of a square pipe of the lower holder (e) viewed from above is configured to be extendable and retractable, a set bolt 13 is screwed in, and a mounting bracket 14 is fixed to the end. Further, a band 15 made of a steel strip is fixed to the mounting bracket 14 with a bolt 16, a hinge 17 for opening the band 15 is also pivoted, and the band 15 is fixed to the pole P with a bolt 19 connected by a clip 18.

Further, a bearing 20 is fixed to the other end of the arm 12, and the shaft 21 is rotatably inserted into the bearing 20. Further, two brackets 23 having through holes for passing the shaft 21 are fixed to the two U-shaped hooks 22, the shaft 21 is inserted into the bracket 23, and fixed with set bolts 24. That is, the shaft 21 becomes immobile.

The set bolt 25 fixes the lateral movement of the arm, and the bolt 26 fixes the hook 22 to the frame F of the ladder.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, it is known that when a work is performed with a ladder on an iron pole or a wall of a building, the work is performed at about 75 degrees with respect to the ground.
First, when a ladder is placed on the iron pole P to perform electric work, the hook 22 of the lower holder is inserted into the ladder frame F at a position within 1 m from the ground and fixed with the bolt 26. Next, while adjusting the length of the arm 12, the band 15 is fixed so as to surround the pole P with a bolt 19, and the set bolts 13 and 25 are tightened to make the arm 12 horizontally balanced.

After attaching the holder for the lower stage as described above, the worker climbs up the step while holding the holder for the upper stage with one hand. The hook 7 is put on the treadle S in a proper position and fixed with the bolt 10. Further, the band 3 is clamped so as to surround the pole P and fixed with bolts 6.

When the work is completed, first remove the upper holder from the pole P, and then remove it from the step rod S. Then, the lower holder is similarly removed from the pole P, and the hook 22 of the frame F is removed and taken out.

It is a front view (a) which shows an embodiment of the present invention, and a side view (b). It is a top view (c) front view (d) showing an upper stage holder. It is a top view (e) front view (f) which shows the holder for lower steps.

Explanation of reference numerals

1 Arm 16 Bolt 2 Pin 17 Hinge 3 Band 18 Crimp 4 Hinge 19 Bolt 5 Crimp 20 Bearing 6 Bolt 21 Shaft 7 Hook 22 Hook 8 Lid 23 Bracket 9 Hinge 24 Set Bolt 10 Bolt 25 Set Bolt 11 Set Bolt 26 Bolt 12 Arm 13 Set bolt 14 Mounting furniture 15 Band

Claims (2)

A pin 3 is pivotally attached to a tip of the arm 1 via a hinge 4 with a pin 3 and a hook 7 is fixed to the other end of the arm 1, and a bolt 10 and a hook for fixing a lid 8 which is opened and closed by a hinge 9. A ladder upper-stage fall-preventing holder having a set bolt 11 for fixing the band 7, a bolt 6 for fixing the band 3, and a clip 5. A mounting plate 14 is fixed to the end of the arm 12 that can be extended and contracted, a band 15 that can be opened by a hinge 17 is fixed to the mounting plate 14 with a bolt 16, and a bearing 20 is fixed to the other end of the arm 12. The shaft 21 is inserted into the bracket 23 and the bearing 20 which are fixed to the hook 22 located at the position, and fixed with the set bolt 24, and further, the set bolt 13 for fixing the telescopic position of the arm 12, the set bolt 25 for fixing the position of the bearing 20, A fall prevention holder for a lower ladder including a bolt 26 for fixing the hook 22, a bolt 19 for fixing the band 15, a clip 18, and the like.

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