KR20150003672U

KR20150003672U - Horizontal keeping devices of portable ladders

Info

Publication number: KR20150003672U
Application number: KR2020150006216U
Authority: KR
Inventors: 이정민
Original assignee: 이정민
Priority date: 2015-09-17
Filing date: 2015-09-17
Publication date: 2015-10-07
Also published as: KR200484560Y1

Abstract

The present invention relates to a horizontal holding device for a portable ladder which can easily and quickly operate not only a fixed height stopper, but also a fixed stopper even on a sloped or curved ground,
A plurality of insertion grooves 11 are formed so that the worm shaft 20 and the shaft 40 can be inserted respectively and the lower side is opened and the lower side is partially opened to facilitate the elevating operation of the elevating support 60, And a bearing 21 inserted and fixed in the insertion groove 11 of the gear box so as to be freely rotatable and a worm gear A worm shaft 20 corresponding to the worm shaft 20 and a worm gear 30 corresponding to the worm shaft 20 are provided at one end and a worm shaft 20 connected to a rotating operation handle 23, A shaft 40 which is inserted through the gear 30 and inserted and fixed in the insertion groove 11 of the gear box so that the bearing 41 can be freely rotated and inserted and fixed, A driven gear 50 which is inserted and fixed in the shaft 40 and interlocked with the rotation of the worm gear 30, A gear 61 is formed so as to be easily engaged with the gear 50 to move up and down, and the rotary motion of the driven gear is converted into a rectilinear motion so as to perform an elevating operation. In the mounting groove 12 of the gear box 10 And an elevating support 60 for elevating and lowering operation in a mounted state, and is detachably mounted and fixed to the lower side of the ladder 70.

Description

[0001] Horizontal holding devices of portable ladders [0002]

The present invention relates to a horizontal holding device for a portable ladder, and more particularly, to a horizontal holding device for a portable ladder which can easily and quickly perform operations, as well as an accurate height adjustment without a separate fixing stopper or a sloped or curved ground .

Generally, the portable ladder is used at the work site where the worker's arm is not exposed. Mostly, 'A' shape and '-' type are being used and used.

These portable ladders are made of aluminum material and can be folded to make them portable and easy to move.

However, as shown in FIG. 1, the conventional 'A' -shaped and -shaped-type ladders are difficult to use because the ladder can not be horizontally aligned at a sloping work site.

That is, when the conventional 'A' and '-' type ladders are used at a sloping work site, a temporary pedestal (80) such as a brick or a tree is suspended under the ladder at a relatively low ground level In this case, there was a fatal problem such as a falling accident when the weight of the worker leans in one direction.

The ladder disclosed in Patent Registration No. 10-0210012 also has an advantage that it is easy to multi-step folding. However, as described above, there is still a risk factor in a sloping ground work site.

Accordingly, it is necessary to provide a ladder that can improve the efficiency and safety of the work by making it possible to quickly and easily adjust the left and right horizontal positions of the ladder at a sloping work site.

In order to solve the above-mentioned problem, the present invention has been made so as to be able to adjust the left and right horizontal position of the ladder quickly and easily at a work site where the ground surface is inclined or uneven, And it is an object of the present invention to provide a horizontal holding device for a portable ladder which can prevent a safety accident such as a falling accident and can improve the efficiency of work.

To achieve the above object, a horizontal holding device S of a portable ladder according to the present invention includes:

A plurality of insertion grooves 11 are formed so that the worm shaft 20 and the shaft 40 can be inserted respectively and the lower side is opened and the lower side is partially opened to facilitate the elevating operation of the elevating support 60, And a bearing 21 inserted and fixed in the insertion groove 11 of the gear box so as to be freely rotatable and a worm gear A worm shaft 20 corresponding to the worm shaft 20 and a worm gear 30 corresponding to the worm shaft 20 are provided at one end and a worm shaft 20 connected to a rotating operation handle 23, A shaft 40 which is inserted through the gear 30 and inserted and fixed in the insertion groove 11 of the gear box so that the bearing 41 can be freely rotated and inserted and fixed, A driven gear 50 which is inserted and fixed in the shaft 40 and interlocked with the rotation of the worm gear 30, A gear 61 is formed so as to be easily engaged with the gear 50 to move up and down, and the rotary motion of the driven gear is converted into a rectilinear motion so as to perform an elevating operation. In the mounting groove 12 of the gear box 10 And an elevating support 60 for elevating and lowering the lid 70 in a mounted state, and is detachably mounted on the underside of the ladder 70.

And a rubber pad 63 is fixed to the lower side of the lifting support 60 to prevent slippage.

A side surface of the gear box 10 is inserted into the left and right sides of the elevation support 60 so that the side surface of the gear box 10 can be stably lifted up and away from the proper position And a rail 62 having a predetermined width is formed.

The horizontal holding device of the portable ladder according to the present invention configured as described above can adjust the left and right horizontal positions of the ladder quickly and easily at the work site where the ground surface is inclined or uneven. So that it is possible to prevent a safety accident caused by a fall, and the efficiency of operation can be improved accordingly.

Brief Description of the Drawings Fig. 1 is an example of a use state showing a work situation using a ladder in a conventional inclined ground
2 is a perspective view showing a preferred embodiment of the present invention.
3 is an enlarged perspective view showing a preferred embodiment of the present invention.
4 is a plan view showing a preferred embodiment of the present invention
Fig. 5 is an operational state diagram showing a state in which the lifting supporter of the present invention is lifted. Fig.
Fig. 6 is an operational state diagram showing a state in which the lifting support is lowered in the present invention
FIG. 7 is a diagram showing a state of use

Hereinafter, the horizontal holding device S of the portable ladder provided in the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

Firstly, it is essential that the horizontal holding device S of the portable ladder provided in the present invention applies the operation principle of the worm gear so that the lifting and supporting stand 60 can move up and down.

More specifically, as shown in FIG. 2, the horizontal holding device S of the portable ladder according to the present invention includes a plurality of insertion grooves 11 so that the worm shaft 20 and the shaft 40 can be inserted, respectively, The gear box 10 is formed with a mounting groove 12 for opening and lowering the elevating support 60 so that the elevating support 60 can be easily lifted and lowered.

The gear box 10 includes a worm shaft 20, a worm gear 30, and a lifting support 60 to which the operating principle of the worm gear is applied.

A worm shaft 20 having a helical line 22 corresponding to the worm gear 30 is inserted into the insertion groove 11 of the gear box 10 so that the bearing 21 can rotate freely And a worm shaft 20 is rotatably mounted on the worm shaft 20 at one end thereof.

A worm gear 30 corresponding to the worm shaft 20 is provided and the worm gear 30 is inserted into the insertion groove 11 of the gear box 10 while passing through the worm gear 30, A shaft is formed in which the bearing 41 is inserted and fixed so as to be easily engaged.

The shaft 40 is configured to transmit the power of the worm gear 30 to the driven gear 50. The worm gear 30 and the worm gear 30 ) And the driven gear 50 may be unnecessary when the gear is engaged, but the operation principle of the overall core worm gear does not change.

A driven gear 50 is inserted and fixed to the shaft 40 and interlocked with the worm gear 30 when the worm gear 30 rotates. A gear 61 And an elevating support 60 for elevating and lowering operation in a state of being mounted on the mounting groove 12 of the gear box 10 is formed.

As shown in FIGS. 4 to 5, a rubber pad 63 is provided on the lower side of the lifting support 60 so as to prevent slippage. .

In addition, on the left and right sides of the elevating support 60, a portion of the side surface of the gear box 10 is inserted into the groove (not shown) so that the elevating support 60 can move up and down stably, The rail 62 is formed.

The side panel of the gear box is inserted into the rail 62, so that the rail 62 performs the same function as the LM guide.

Since the horizontal holding device S of the portable ladder according to the present invention having the above characteristics is set as a single product in the gear box 10, only the gear box 10 is fixed to the ladder, and even if it is inclined or uneven The left and right sides of the ladder are horizontal.

Since the worm gear 30 does not rotate to the driven gear 50 interlocked with the worm gear as well as the worm gear 30 without rotating the worm shaft 20 formed with the spiral 22, It is possible to maintain the state of height adjustment without using a fixing device such as the above.

In addition, since it does not step up and down, it is easy to adjust the height to a precise level.

S: Leveling device
10: Gear box 11: Insert groove
12: mounting groove 20: worm shaft
21: Bearing 22: Spiral
23: handle 30: worm gear
40: shaft 41: bearing
50: driven gear 60: lifting support
61: gear 62: rail
63: Rubber pad 70: Ladder
80: Stand

Claims

A plurality of insertion grooves 11 are formed so that the worm shaft 20 and the shaft 40 can be inserted respectively and the lower side is opened and the lower side is partially opened to facilitate the elevating operation of the elevating support 60, A gear box (10) having a mounting groove (12) for mounting and fixing the mounting member (60);
The bearing 21 is inserted and fixed in the insertion groove 11 of the gear box so as to be freely rotatable. A spiral 22 corresponding to the worm gear 30 is formed. At one end of the bearing 21, A worm shaft 20 connected to the worm shaft 20;
A worm gear (30) corresponding to the worm shaft (20);
A shaft (40) which is inserted through the worm gear (30) and inserted and fixed in the insertion groove (11) of the gear box so that the bearing (41) is axially inserted and fixed so as to be freely rotatable;
A driven gear (50) inserted in the shaft (40) and interlocked when the worm gear (30) is rotated;
A gear 61 is formed so as to be easily engaged with the driven gear 50 so that the rotary motion of the driven gear is converted into a rectilinear motion to perform an elevating operation, An elevating support 60 for elevating and lowering operation in a state of being mounted on the elevating support 60;
, And is detachably mounted on the lower side of the ladder (70).

The method according to claim 1,
And a rubber pad (63) is fixed to the lower side of the lifting support (60) to prevent slippage.

The method according to claim 1,
A side surface of the gear box 10 is inserted into the left and right sides of the elevation support 60 so that the side surface of the gear box 10 can be stably lifted up and away from the proper position And a rail (62) having a plurality of projections formed thereon.