KR102449036B1 - A ladder with height adjustment clamp - Google Patents

Abstract

The present invention relates to a clamp for adjusting the height of a safety handrail in a work ladder having a work plate.
The present invention has a plurality of footrests (2) between the poles (1) and the poles (1a), and is made up of a pair of left and right, and is erected on the ground and has a working plate (10) for a worker step on the upper side thereof. The safety handrail 100 is installed on the upper side of the work plate 10, and the safety handrail 100 is connected to and fixed to the auxiliary post 120 that is slide-inserted into the posts (1) (1a), A clamp 200 is installed on the posts 1 and 1a so that the auxiliary posts 120 can be locked in a selected position.
The present invention has the advantage of being simple and easy to operate by one worker, and stable locking can be achieved by manipulating the height of the safety handrail to fit the body type of the worker on the work ladder through vertical rotation of the lever constituting the clamp.

Description

{A ladder with height adjustment clamp}

The present invention relates to a work ladder provided with a work plate for work and a safety handrail for worker protection, and more particularly, to make it easy to adjust the height of the safety handrail from the work ladder by a worker, and to make locking and unlocking simple at the same time It relates to a clamp for adjusting the height of a safety handrail in a work ladder having a work plate to make it work.

In general, a ladder is a tool used to go up and down a position of a certain height from the ground, and has a structure in which a plurality of stepping plates in the horizontal direction are arranged at equal intervals in the vertical direction between a pair of posts located on the left and right, and various work spaces In the state of being installed on the floor, the user works by stepping on the stepping board and going up and down.

In addition, the ladder is designed to adjust the height of the working space so that work at height is possible, and to adjust the height of the plate constituting the working space, the posts are separated into upper and lower posts that can be slide-coupled to each other, and the lower posts can adjust the height according to the working position. A deployable ladder in which the upper strut is drawn out is applied, and in the case of the above-described deployable ladder, the poles are locked to each other through a clamp in the height adjustment state to maintain a fixed state.

However, in the case of the above clamps, most of the clamps are pin-fixed by pulling the pin with the handle to release the lock and then expand and contract. In this case, there has been a problem that the work is difficult.

Recently, a safety ladder for worker protection has been applied, and in the case of the above-described safety ladder, a separate work plate, which is a work space, is provided at the top of the ladder so that the worker can work while standing on the top of the ladder. A separate safety handrail is installed on the upper side to prevent workers working in the work space from falling.

The above-mentioned safety handrail protects the worker while not interfering with the worker's work by supporting the worker's waist. there have been problems

The background or prior art described herein is information possessed by the inventor or acquired in the process of deriving the present invention, and is only intended to help understand the technical meaning of the present invention, and prior to the filing of the present invention, the technology to which this invention belongs This does not mean that the technology is widely known in the field.

KR Patent Registration No. 10-1709703 Registration Date 2017.02.17 KR Patent Registration No. 10-0949772 Registration Date 2010.03.19 KR Patent Registration No. 10-0949780 Registration Date 2010.03.19 KR Utility Model Registration No. 20-0311191 Registration Date 2003.04.09

Accordingly, the present inventor comprehensively considers the above-mentioned matters, and in the idea of solving the technical limitations and problems of the safety handrail of the work ladder for the work convenience of the worker and the work safety of the worker, safety according to his body type by the worker The present invention was invented as a result of continuous research to develop a safety handrail locking clamp for a work ladder of a new structure that can match the height of the handrail and makes locking and unlocking easier, as well as stability. did it

Therefore, the technical problem and object to be solved by the present invention is to provide a clamp that can be operated easily and stably by one worker when adjusting the height of the safety rail on the work ladder.

Here, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects not mentioned will be clearly understood by those skilled in the art from the following description.

Specific means according to the present invention for achieving the object and solving the technical problem as described above, has a plurality of footrests between the poles and the poles, is made of a pair of left and right, is erected on the ground, and a work plate for stepping the worker on the upper side In a work ladder having A clamp is provided for locking.

The clamp includes a body having a holding part coupled to the post on one side with respect to the support part as a center and a body forming an open guide part on the other side, a guide plate having both ends fixed to the inner wall of the guide part, and the support part; A round-bar-shaped locking tool positioned while passing through a guide hole formed in the center of the guide plate, a lever positioned on the guide and connected through a connecting pin rotatably with respect to the upper end of the locking tool, and a state surrounding the locking tool a spring having one side supported on the bottom surface of the guide plate and the other side being supported by a ring piece coupled to the outer circumferential surface of the locking member and elastically deformed; It may be configured to include a cam piece for fixing and releasing the post and the auxiliary post by moving forward and backward.

The cam piece is formed at the front end of the lever and is formed at a horizontal end that is in close contact with the surface of the guide plate through a spring restoring force in the forward state of the locking member, and is formed at an end of the horizontal end, and the locking member is rotated according to the rotation of the lever. It can be applied to a round end that slides on the guide plate while pulling.

At the end of the round end, an upright fastening end parallel to the guide plate may be formed so that the position can be fixed when the lever is rotated.

A protrusion may be formed on one side of the locking member, and the connecting pin may be connected to the protrusion.

A curved guide groove may be formed on the surface of the guide plate to slide and guide the cam piece, and a round groove may be further formed on the surface of the guide groove to guide the round end when the lever is rotated. can make it happen

If you want to adjust the position of the work ladder safety handrail in accordance with an embodiment according to the present invention, rotate the lever coupled to each pole of the ladder. Then, the lever rotates around the connecting pin and at the same time, the cam piece supports the guide plate and pulls the locking tool. At this time, the pulled locking tool is separated from the locking groove of the auxiliary support so that the auxiliary support slides up and down with respect to the support. After adjusting, rotate the lever to the initial position.

The present invention, having means and configuration for achieving the above object and solving the technical problems, can be operated through the vertical rotation of the lever constituting the clamp when adjusting the height of the safety rail to fit the body shape of the worker on the work ladder. It has the advantage of being simple and easy to operate by one operator, and stable locking is achieved.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a state in which a clamp for adjusting the height of a safety handrail is installed in a work ladder having a work plate according to the present invention;
Figure 2 is an exploded perspective view of the clamp in Figure 1;
Figure 3 is a cross-sectional view of the assembled state of Figure 2;
Figure 4 is a cross-sectional view of a state in which the connection state is released by pulling the lever in Figure 3;

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

Prior to this, the terms described below are defined in consideration of the functions in the present invention, which indicate that they should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly or commonly recognized in the art.

In addition, when it is determined that a detailed description of a known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The accompanying drawings show that parts are exaggerated or simplified for the sake of convenience and clarity of explanation and understanding of the configuration and operation of the technology, and it is revealed that each component does not exactly correspond to the actual size and shape.

In addition, in this specification, the term and/or is meant to include a combination of a plurality of related described items or any of a plurality of related described items, and when a part includes a certain component, it is a description that is specifically opposite This does not mean that other components are excluded, but other components can be further included.

That is, it means that there is a feature, number, step, operation, component, part, or a combination thereof described in this specification, and one or more other features or number, step operation component, part, or a combination thereof It is to be understood that this does not exclude the possibility of the existence or addition of those.

And terms such as upper, lower, upper, lower, upper, lower, upper, lower, front and rear, left and right are used for convenience to distinguish relative positions of each component. For example, the upper side in the drawing may be named or referred to as the upper side and the lower side as the lower side, the longitudinal direction may be named or referred to as the front-back direction, and the width direction may be named or referred to as the left/right direction.

Also, terms such as first, second, etc. may be used to describe various components. That is, terms such as first, second, etc. may be used only for the purpose of distinguishing one component from another. For example, a first component may be referred to as a second component without departing from the scope of the present invention, and the second component may also be referred to as a first component.

The present invention is a work plate 10 for worker stepping on the upper side of the work ladder as shown in Figs. It is composed of a clamp 200 that can adjust the height of the safety handrail 100 with respect to the work plate (10).

The work ladder, the same as the work ladder applied in the industrial field, etc. in the public domain can be applied, and the ladder having a plurality of footrests (2) between the post (1) and the post (1a) is installed as a pair to face each other and installed on the ground it was made to be built.

Posts (1) (1a), those manufactured through bending of a metal plate or aluminum extrusion molding may be applied, and it is preferable to form a hollow rectangle when taking a cross section.

The work plate 10 is a known technique in which an operator can work while standing and stepping, and it is made in the form of a square or rectangular panel, and the operator steps on the upper side of the posts (1) (1a) constituting the work ladder. It is installed and maintained horizontally so that it can be

The safety handrail 100 is located on the upper side of the work plate 10 and is installed along the circumference so that the operator does not deviate from the work plate 10 .

In addition, the safety handrail 100 is coupled to the auxiliary post 120 that is slide-inserted with respect to the posts (1) (1a) and extends up and down, and the auxiliary posts (120) are for the posts (1) (1a). The height is adjusted and fixed so as to be selectively locked to the posts 1 and 1a through a clamp 200 .

The auxiliary post 120 is to slide inside each of the posts 1 and 1a, and has a rectangular shape and locking holes 122 at equal intervals to be caught when the clamp 200 is operated on the surface. array is formed.

Clamp 200, a body 210 fixed to the upper side of the posts (1) (1a), a guide plate 220 fixed to the upper side of the body 210, the body 210 and the guide plate 220 And a locking member 230 that slides through the posts (1) (1a) to be inserted into the locking hole 122 of the auxiliary post 120, and the locking hole 122 by moving the locking member 230 ), a lever 240 for locking and releasing, a spring 250 for restoring the locking tool 230 while being elastically supported by the body 210, and the guide plate 220 formed at the tip of the lever 240 ) and slides during rotation to move the locking member 230 back and forth to fix and release the posts 1 and 1a and the auxiliary posts 120 .

The body 210 is composed of a support portion 211 , a holding portion 212 , and a guide portion 213 .

The support part 211 is plate-shaped, and a guide hole 211a is formed through the center position, and the guide hole 211a is formed when the support part 211 is in close contact with the posts 1 and 1a. It is in close contact with the locking hole 1c formed in (1a). And on both sides of the support portion 211, both fixing pieces constituting the holding portion 212 protrude.

The holding part 212 is coupled with a fastener in a state in close contact with the side of the holding post (1) (1a) through both fixing pieces.

The guide portion 213 includes a pair of guide pieces 213a and 213b fixed to the other side of the support portion 211 .

The guide plate 220, both ends are bent to form coupling ends 220a and 220b, and the coupling ends 220a and 220b are fasteners on the inner walls of the guide pieces 213a and 213b. (214). In addition, a guide hole 231 having the same size as the guide hole 211a of the support part 211 is formed on the same axis at the central position.

Here, as another example, the guide plate 200 may have a guide groove 222 bent so that the cam piece 260 is slide-guided on the surface thereof.

The locking member 230 has a circular or square round bar shape, and is positioned while sliding through the guide holes 211a and 231 formed in the center of the support part 211 and the guide plate 200 . And a protrusion 234 is formed protruding from one end, and a connecting pin 241 is fitted to the protrusion 234 in the throttle direction to be fixed.

The lever 240 is positioned between both guide pieces 213a and 213b constituting the guide portion 213 and both ends of the connecting pin 241 are rotatably fixed to both inner walls.

That is, the lever 240 rotates around a connection pin 241 having a handle on one side and fixing the locking tool 230 on the other side.

The spring 250 is elastically deformed while one side is supported by the bottom surface of the guide plate 220 and the other side is supported by the ring piece 233 coupled to the outer circumferential surface of the locking member 230 in a state surrounding the locking member 230 . do.

That is, when the locking member 230 moves upward, it is compressed, and when the external force of the locking member 230 is removed, the locking member 230 is moved to the initial position while returning to the initial state through a restoring force.

The ring piece 233 is formed in the form of a known snap ring, and is fitted into a ring groove formed on the outside of the locking member 230 to support the spring 250 .

The cam piece 260 is formed at the tip of the lever 240, is in close contact with the guide plate 220, and slides when the lever 240 is rotated to move the locking member 230 back and forth to the support (1). (1a) and the auxiliary post 120 are fixed and released.

The cam piece 260 is positioned in close contact with the guide groove 222 of the guide plate 220 and slides on the surface of the guide groove 222, is formed at the tip of the lever 240 and the lock The horizontal end 262 that is in close contact with the surface of the guide plate 220 through the restoring force of the spring 250 in the forward state of the sphere 230, is formed at the end of the horizontal end 262, and of the lever 240 It is applied that a round end 264 that slides on the guide plate 220 is formed while pulling the locking member 230 according to the rotation.

In addition, at the end of the round end 264 , a locking end 266 of an upright shape parallel to the guide plate 220 is formed so that the position can be fixed when the lever 240 is rotated.

Here, on the surface of the guide groove 222 of the guide plate 220, the round end 264 is induced to slide when the lever 240 is rotated, and the locking end 266 is engaged with the round groove. It would be preferable to form more

Accordingly, when the lever 240 is rotated around the connecting pin 241, the round end 264 of the cam piece 260 slides along the round groove, and at the same time, the locking member 230 is pulled and the locking end ( 266) is out of the round groove, it maintains the jammed state and maintains the fixed state.

In the case of adjusting the height of the safety handrail 100 provided in the work ladder according to the embodiment according to the present invention, the lever 240 of the clamp 200 coupled to each of the posts 1 and 1a is lifted. Then, the lever 240 is rotated upwards centering on the connecting pin 241 , and at the same time, the cam piece 260 slides and supports the guide plate 220 . At this time, as the round end 264 formed at the tip of the lever 240 is supported on the surface of the guide groove 222 of the guide plate 220, the connecting pin 241 pulls the locking member 230, and at the same time, the spring ( 250 is compressed according to the movement of the ring piece 233 . The tip of the locking member 230 that is continuously pulled is separated from the locking hole 122 of the auxiliary post 120 so that the auxiliary post 120 can slide up and down with respect to the posts (1) (1a). Then, when the operator pushes up the auxiliary post 120 to confirm the position of the safety handrail 100 and positions the lever 240 in the initial state, the spring 250 moves the locking tool 230 through the restoring force and the locking mechanism ( When the tip of the 230) is positioned at the position of the locking hole 122 of the auxiliary post 120, it is locked while moving through the restoring force of the spring 250, thereby completing the height adjustment.

Here, in the work ladder according to an embodiment of the present invention, the configuration of the work plate and the safety handrail located on the upper side of the post is the same as the known technology, and a detailed description thereof will be omitted.

On the other hand, the present invention is not limited by the above-described embodiments and the accompanying drawings, and can be variously modified and applied without departing from the technical spirit of the present invention, as well as various modifications and applications of each component. It is apparent to those of ordinary skill in the art to which the present invention pertains that it can be widely applied by changing the substitution and other equivalent embodiments.

Therefore, the contents related to the modification and application of the technical features of the present invention should be interpreted as being included within the technical spirit and scope of the present invention.

1,1a: post 2: scaffold
10: work plate
100: safety handrail 120: auxiliary post
200: clamp
210: body
211: support unit 212: land support government
213: information department
220: guide plate
222: guide groove 224: round groove
230: lock
234: turn
240: lever 241: connecting pin
250: spring
260: cam
262: horizontal stage 264: round stage
266: locking end

Claims (7)

In the work ladder having a plurality of footrests (2) between the posts (1) and the posts (1a), the left and right pairs are built up on the ground and having a work plate (10) for the worker step on the upper side thereof,
The safety handrail 100 is installed on the upper side of the work plate 10, and the safety handrail 100 is connected to and fixed to the auxiliary post 120 that is slide-inserted into the posts (1) (1a), Install the clamp 200 to the post (1) (1a) so that the auxiliary post 120 can be locked in the selected position,
A body 210 in which the clamp 200 is provided with a holding part 212 coupled to the post on one side with the support part 211 as a center and an open guide part 213 on the other side; A round bar positioned while passing through a guide plate 220 having both ends fixed to the inner wall of the guide part 213, and guide holes 211a and 231 formed in the center of the support part 211 and the guide plate 220. A locking member 230 of the shape, a lever 240 positioned on the guide part 213 and connected through a connecting pin 241 rotatably with respect to the upper end of the locking member 230, and the locking member ( A spring 250 that is elastically deformed while one side is supported by the bottom surface of the guide plate 220 and the other side is supported by the ring piece 233 coupled to the outer circumferential surface of the locking member 230 in a state surrounding 230, and the lever ( 240) is formed at the tip of the guide plate 220, is in close contact with the guide plate 220, and slides during rotation to move the locking member 230 forward and backward so that the post and the auxiliary post are fixed and released.
The cam piece 260 is formed at the tip of the lever 240 and is in close contact with the surface of the guide plate 220 through the spring 250 restoring force in the forward state of the locking member 230. A horizontal end 262. and a round end 264 formed at the end of the horizontal end 262 and sliding on the guide plate 220 while pulling the locking member 230 according to the rotation of the lever 240,
At the end of the round end 264, a work plate, characterized in that a locking end 266 of an upright shape parallel to the guide plate 220 is formed so that the position can be fixed when the lever 240 is rotated. Clamp for adjusting the height of the safety handrail on a work ladder with
delete delete delete According to claim 1,
A clamp for adjusting the height of a safety handrail in a work ladder having a work plate, characterized in that a protrusion 234 is protruded from one side of the locking member 230 and the connecting pin 241 is connected to the protrusion 234 .
According to claim 1,
On the surface of the guide plate 220,
A clamp for adjusting the height of a safety handrail in a work ladder having a work plate, characterized in that a guide groove 222 bent so that the cam piece 260 is slide-guided is formed.
7. The method of claim 6,
On the surface of the guide groove 222,
A clamp for adjusting the height of a safety handrail in a work ladder having a work plate, characterized in that a round groove 224 is further formed so that the round end 264 can be guided when the lever 240 is rotated.

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