WO2011027970A2

WO2011027970A2 - Clamp

Info

Publication number: WO2011027970A2
Application number: PCT/KR2010/004380
Authority: WO
Inventors: 박영경
Original assignee: (주)삼화기업
Priority date: 2009-09-03
Filing date: 2010-07-06
Publication date: 2011-03-10
Also published as: KR100952878B1; WO2011027970A3

Abstract

Disclosed is a clamp. The disclosed clamp comprises: a main holder body fastened to a secure rail; supporting means installed on a lower portion of the main holder body to support a work scaffold; and fastening means for clamping from the top and bottom in conjunction with the supporting means. The fastening means comprises: a pressing unit at the lower end for direct clamping against the work scaffold; a vertically movable unit disposed on an upper end of the pressing unit, which has a step portion the width of which tapers narrowly towards the lower end and which is integral with the pressing unit for vertical movement; a rotating portion coupled to the top end of the vertically movable unit via a nut and a bolt, which has a rotating upper head portion; and a sealing unit enclosing the outer surfaces of the vertically movable unit and the rotating portion, which is shielded from dust particles by a shielding means. Accordingly, pressure may be more effectively applied against the work scaffold and, additionally, the clamp is shielded from dust, paint and other particles, which extends the service life of the clamp.

Description

clamp

The present invention relates to a clamp, and more particularly to a clamp used for the construction of a safety rail or working scaffold.

The technical configuration of the conventional clamp is of the support base body which is fastened vertically with the horizontally installed safety rail to prevent the fall and is installed in the lower portion of the support base body, the support means for holding the bottom of the working scaffold and the support base body It is formed on one side and consists of a fastening means for clamping (CLAMPING) while pressing the scaffold in the vertical direction together with the support means.

The technical field required for such a clamp is as follows.

First, the most important point in the manufacture of clamps is safety. In other words, a clamp having strength sufficient to withstand the load is required.

Second, there is also a need to leave enough space to compress the scaffolding to safely construct a working scaffold.

Third, since the use environment of the clamp is mainly exposed to soil cement or other dust, various fastening parts often fail to function. Therefore, a technical means for blocking such dust is required.

Fourth, a rotation means for quicker and easier clamping is required.

1 and 2 show a typical scaffold hypothesis and clamps according to the prior art used therein. As shown, a plurality of safety rails (1) is installed horizontally, there is a support post (3) vertically to support it, the safety rail (1) and the support post (3) is connected by a fastening means (2) do. Meanwhile, the clamp 4, which is a technical field of the present invention, functions to connect the lower end of the support stand 3 and the footrest 5.

That is, when the footrest 5 is inserted into the top of the unevenness 8 and a predetermined rod is inserted into the rotation hole 9 of the rotating part 6, the crimping part 7 is fixed while pressing the upper surface of the footrest.

As such, most clamps are exposed to the outside of the screw thread, so that foreign materials such as iron powder, rust, grit, cement, and the like are easily attached, and thus the life of the clamp is shortened.

For example, in the case of rust removal work, the rust removal work is performed with a strong pressure of 5 kg or more per square centimeter, and various iron powders and grit metal particles are generated. In this way, the dust or the like is caught in various fastening parts of the working scaffolding clamp, so that the clamp often fails to function. In particular, even when the temporary working scaffolding dismantling work is required, various foreign matters are fastened to the screw thread. It is currently a situation that a significant time and economic loss is generated, such as being unable to dismantle work by easily turning the screw because it is stuck to the solid.

In the clamp of the present invention, it is intended to solve the following technical problem in consideration of the technology required in the clamp.

First, the most important point in the manufacture of clamps is safety. In the construction of the working scaffold, the load of the construction apparatus itself, the weight of the worker, and the load of other working equipment placed on the working scaffold are concentrated on the clamp, as well as to lift the necessary objects by the rope to the construction apparatus. There is a need for a clamp that can withstand various large loads, such as additionally generated loads, in a stable enough manner.

Second, there is a need for a clamp that can dramatically increase the time or labor required for dismantling work scaffolds. In particular, in dismantling the construction scaffolding related to ship work, a lot of labor and time is spent to remove various rust, grits, metal dust and other dusts stuck on various screws fastened for two to three months. There is a need for a clamp that can solve this problem.

For example, in the case of rust removal, the rust removal is performed with a strong pressure of 5 kg or more per square centimeter, at which time various kinds of dust such as various kinds of iron powder and grit metal particles are generated.

In this way, the dust or the like is caught in various fastening parts of the working scaffolding clamp, so that the clamp often fails to function, and even when the temporary working scaffolding dismantling work is required, various screws cannot be rotated. Time and economic loss is occurring. Therefore, there is a need for a clamp having technical means capable of effectively blocking the aforementioned various dusts.

Third, in constructing a working scaffold, a technique capable of clamping even with a weak force is required by having a means for reducing physical fatigue and working time caused by fastening a large number of clamps and the like.

The configuration of the present invention devised to solve the problems as described above will be described.

The clamp according to the present invention is installed on the support body main body and the support body which is vertically fastened to the safety rail installed horizontally to prevent the fall, the support means for supporting the bottom surface of the working scaffold and one side of the support main body Is formed in and basically provided with a fastening means for clamping (CLAMPING) in the vertical direction together with the support means,

A lower portion of the fastening means, the close contact portion for clamping while directly in contact with the working scaffold; It is fastened to the upper side of the close-up portion, the lower end of the shangdong and having a portion of the width is reduced, and the east and east to move up and down integrally with the close-up portion; A rotating part which is fastened to the shanghai east part by a bolt / nut coupling and rotates an upper head part at an upper part of the shanghai east part; Wrapping the outer circumferential surface of the east and east of Shanghai and the rotating part, it comprises a sealing unit having a dust blocking means therein.

The close contact portion serves to directly press the upper surface of the working scaffold, the inside is formed in the shape of an empty hemisphere, the width of the outer circumference of the bottom surface of the close contact portion in the hemispherical shape is formed to be wider than the cross-sectional area of the east of Shanghai Distribute the pressure evenly to minimize rupture of the lower end of the clamp. In addition, the close contact portion is severely subjected to the load, characterized in that the heat treatment.

A jaw is formed in the lower part of the east part of Shanghai, and a protrusion formed by reducing the width of the upper part from the jaw is connected through a hole formed in the upper part of the contact part. And inserting a flat washer between the split pin and the inner surface of the close contact, to fasten the close contact with the east of Shanghai. Spring pins can be used instead of split pins. In the case of using a spring pin, a groove should be formed along the outer circumferential surface of the lower end of the east side of the shanghai, and the spring pin is fitted into the groove.

As described above, the central portion of the bottom surface of the east part of Shanghai is connected and fixedly coupled to the inside of the close-up part, and the surface of the jaw portion of the east part of Shanghai is supported by the top surface of the east part of Shanghai. At this time, the flat pin washer is further provided between the spring pin or the straight pin and the contact portion, so that the shanghai east portion can be stably coupled to the contact portion without shaking.

The shanghai east portion has a screw thread formed inside the upper end portion thereof, and a bolt structure corresponding thereto is formed at the lower portion of the pivot portion. The outer circumferential surface of the east-east part of the cylinder is in the form of a cylinder, and is machined flat from the position lowered by a predetermined length from the top thereof to the lowest end, and a key having a shape corresponding to the processed portion has a key at the lower end of the sealing portion. Characterized in that formed. This key (KEY) serves to stabilize the vertical movement only, so that the shanghai East portion does not drift inside the seal.

The bolt / nut structure of the pivoting part and the shangdongdong part has a square thread to better withstand the large load of the clamp.

On the other hand, the head portion of the upper portion of the rotating part is preferably formed of a polygon such as square head, hexagon head. Since it has such a polygonal structure, it does not need a device for turning a separate rotating part. It is also possible to rotate by rotating a hole in the head of the rotating part horizontally, but a more preferred embodiment is advantageous in that there is no additional device in the form of the hexagonal head as described above. A flat washer is inserted between the head portion of the pivot portion and the upper end portion of the seal portion, thereby allowing the pivot portion head to be rotated more stably.

One side of the outer circumferential surface of the rotating part is formed with a flange protruding evenly along its circumference, and the sealing part is fixed between the bottom surface of the head of the rotating part and the upper surface of the flange.

Three bodies are formed by welding to prevent rotation.

On the other hand, the dust blocking means of the sealing is characterized in that the O-ring (O-RING) formed of nitrile rubber or a polymer material. Since the clamp of the present invention is mainly used at construction sites, the concentration of soil, paint and other dusts is high. If such dust is caught in the threaded portion of the various bolt nuts of the present invention, the operation of the clamp itself is impossible, and the economic loss is increased. This necessity led to the adoption of the O-ring as an important component of the sealing device.

As described above, the clamp according to the present invention has the following effects.

First, by providing means to effectively prevent dust, such as O-rings and seals, it effectively blocks the branches of various iron powder, grit (metal) dirt, etc. generated in the construction site to significantly extend the life of the clamp In addition, the construction period can be shortened, reducing the labor force and economic benefits.

Second, it is possible to reduce the physical fatigue and working time generated by simply turning a large number of clamps during work scaffolding and dismantling work by simply rotating the rotating part without additional rotating device.

Third, it can withstand various large loads related to the working scaffolding stably enough.

Fourth, it is possible to improve the stability of the rotating unit operation by applying an improved key having a large area (KEY).

Fifth, by improving the width and shape of the surface to be pressed on the scaffolding it is possible to safely construct a working scaffold than before.

1 illustrates a hypothetical scene of a typical working scaffold.

FIG. 2 is an enlarged view of the clamp in FIG. 1.

3 is a perspective view of a clamp according to an embodiment of the present invention.

4 is an exploded perspective view of the clamp shown in FIG.

5 is an exploded perspective view when the split pin is inserted in the east of Shanghai instead of the spring pin in the exploded view of the clamp shown in FIG.

6 is a left side view of the clamp of the present invention.

Figure 7 is a left side view of the foot clamp inserted into the clamp of the present invention.

8 is a cross-sectional view of the clamp in a state in which the shanghai east part of the clamp of the present invention is raised upward.

9 is a cross-sectional view of the clamp in a state in which the shanghai portion of the clamp of the present invention is lowered as far as possible.

10 is a perspective view of a clamp according to another embodiment of the present invention.

FIG. 11 is an exploded perspective view of the clamp shown in FIG. 10.

Preferred embodiments of the technical problem solving means described above will be described in detail with reference to the drawings. Not only the invention presented in this embodiment but all inventions of the equivalent level which can be easily modified at the level of those skilled in the art are within the scope of the present invention.

Figure 3 is a perspective view of a clamp according to an embodiment of the present invention, Figure 4 is an exploded perspective view of the clamp shown in Figure 3, Figure 5 is an exploded view of the clamp shown in Figure 4 instead of the spring pin split pin is inserted into the east of Shanghai As an exploded perspective view of the time, the clamp according to the embodiment of the present invention, the support main body 100 and the support main body 100 which is fastened vertically with the safety rail (see Fig. 1) horizontally installed to prevent the fall. It is installed on the lower side of the working footrest (see Fig. 7; 400) is formed on one side of the support means 200 and the support main body 100 and in the vertical direction together with the support means 200 And fastening means 300 for clamping.

Here, the clamp, the lower portion of the fastening means 300, the close contact portion 340 for clamping the work scaffold while directly in contact with the work scaffold; It is fastened to the upper side of the close contact portion 340, and has a jaw formed at the lower end thereof has a protrusion 331 having a width smaller than the upper side in the downward direction from the position of the jaw, integral with the close contact portion 340 Shanghai East 330 to be up and down movement; At the upper portion of the Shanghai East 330, the Shanghai East 330 is fastened to the bolt / nut coupling, the rotating portion 310 that can rotate the head portion; Wrapping the outer circumferential surface of the Shanghai East portion 330 and the rotating portion 310, it comprises a sealing portion 320 having a dust blocking means therein.

The upper surface of the support means 200 is formed to prevent the slipping of the working step by forming a concave-convex 201 as in the prior art.

First, the close contact portion 340 which serves to press the footrest while directly contacting the footrest (see FIG. 7, 400) will be described.

The close contact portion 340 has a hollow hemispherical shape in order to prevent the concentrated load from being applied. Specifically, the center of the close contact portion 340 is a hole, the radius of the hemispherical shape is gradually widened downward while forming a constant curvature. In addition, the upper surface of the contact portion 340 is flat so that the upper surface of the contact portion 340 corresponds to the jaw surface where the east portion 330 and the protrusion 331 meet, that is, the donut-shaped surface on which the east portion 330 is seated on the contact portion 340. do.

FIG. 8 is a cross-sectional view of the clamp in a state where the shanghai portion of the clamp of the present invention is raised upward, and FIG. 9 is a cross-sectional view of the clamp in a state where the shanghai portion of the clamp of the present invention is lowered as far as possible. A cross section of 340 can be seen. That is, it has a certain thickness, and the thickness must be formed to a predetermined thickness that is not ruptured by the compression load or other movement of the scaffold (see FIG. 7, 400), and the material is heat treated to have a high strength steel material. Preference is given to using.

The area of the outer circumference of the bottom surface of the hemispherical contact portion 340 is preferably formed to be wider than the cross-sectional area of the eastern part of the hemisphere to make the clamping more stable. This is because if the portion for pressing the scaffold 400 is narrow, a concentrated load may be generated on the scaffold.

The protrusion 331 at the lower end of the east-east part 330 is inserted through the hole formed in the upper part of the contact part 340, and after the flat washer 341 is also inserted, the outer circumferential surface of the lower end of the protrusion 331. A groove 334 is formed along the spring pin 342 into the groove 334. That is, a flat washer 341 is inserted between the spring pin 342 and the inner surface of the contact portion 340. In the fastened state as described above, the surface of the jaw portion where the shanghai 330 and the protrusion 331 meet is seated on the flat surface of the upper portion of the contact portion 340 to support the load according to the compression. In FIG. 8, it is possible to better understand the state in which the east-east part 330 is seated on the close contact part 340.

In FIG. 5, a split pin 343 may be used as a means for fastening the shanghai 330 and the close contact 340. A hole (not shown) is formed laterally through one side of the protruding portion 331, and the split pin 343 is inserted through the hole, and is flat between the split pin 343 and the inner surface of the contact part 340. The flat washer 341 is inserted.

In order to explain the assembly method, inserting the split pin 343 is preferably pushed through a hole formed in one side of the close contact portion 340 and subsequently inserted into the hole of the protrusion 331 in manufacturing.

On the other hand, not only the hole but also the groove 334 into which the spring pin (see FIG. 4, 342) is fitted is formed in the protrusion 331, for the reason that the split pin 343 or the spring pin 342 is selectively selected. This is to make it available.

Hereinafter, the structure of the pivoting part 310 and the coupling of the pivoting part 310 and the shanghai east part 330 will be described with reference to FIG. 4.

The structure of the rotating part 310 is composed of a rotating part body 311, a bolt part 315, a flange 316, a rotating part head 312 and the rotating part washer 313.

Specifically, the flange 316 is formed on one side of the rotating body 311, the bolt portion 315 is formed below. An upper cap 321, a rotating washer 313, and a rotating head 312 are fitted to the upper side of the rotating body 311 in order. They cannot catch down on the flange 316 and go down. After the fitting, the portion where the upper edge of the rotating body 311 and the rotating head 312 contact each other is welded (see FIG. 6, 329a and 329b) to rotate the rotating head 312 and the rotating body 3110 as one. To be combined into the body.

The rotating part washer 313 serves to support the bottom surface of the rotating head 312 stably during the rotation of the rotating head 312. Meanwhile, the O-ring 325a of the upper cap shown in FIG. 4 will be described later, but the O-ring 325a of the upper cap is inserted into the inner surface of the upper cap 321 to introduce dust, soil, cement, or the like. It will block the entry of contaminants.

Hereinafter, referring to the coupling of the rotating part 310 and the shanghai east part 330, the shanghai east part 330 is formed with a screw thread 332 in the upper end portion thereof, and the rotating part of the rotating part 310 is formed. The lower portion of the body 311 is formed with a bolt portion 315 corresponding to the screw thread (332). Therefore, when the worker rotates the pivoting part 310, the shanghai east part 330 moves up or down.

Hereinafter, the structure of the east east part 330 will be described with reference to FIG.

The outer circumferential surface of the Shanghai East part 330 is in the form of a cylinder, and a flat portion 333 is formed to be flattened with a predetermined width from a position lowered by a predetermined length from the top thereof to a lower end thereof. Keys 328 having a matching shape are formed on one side of the bottom surface of the lower cap 323.

The bolt portion 315 and the inner thread 332 of the shangdong 330 is formed in the form of a square thread, because in consideration of safety, it is preferable that the thread form that can withstand large loads.

Hereinafter, the reason why the key 328 and the flat portion 333 are formed to slide while contacting each other will be described with reference to FIGS. 4 and 7.

That is, without the key 328 device, as the rotating head 312 is rotated, the shanghai 330 fastened to the bolt 315 is rotated together, so the shanghai 330 is in this state. Cannot move up and down. Therefore, by using the key 328 device to hold the rotation of the Shanghai East 330 and only to go straight. More specifically, even if the rotating head 312, the upper cap 321 and the housing 322 and the lower cap 323 at the bottom is fixed and does not rotate, at this time, the lower cap ( Since the key 328 of 323 is in surface contact with the flat portion 333 on the east-east 330 in a flat plane, the east-east 330 does not rotate but only goes straight downward. Of course, if the rotating head 312 is rotated in reverse, Shanghai East 330 is up. 6 and 7 illustrate a situation in which the east east 330 is moved to the highest and lowest positions, respectively.

On the other hand, the upper rotating part head 312 of the rotating part 310 is preferably formed of a polygon such as square head, hexagon head. Because of this structure, it can be clamped by rotating with the hands on the rotating head 312 of the polygonal shape without a device such as a separate rotating rod. On the other hand, the reason why the rotating washer 313 is inserted between the rotating head 312 and the upper end of the sealing portion is to ensure a stable rotation of the rotating head 312.

Hereinafter, the sealing unit 320 that can effectively block the dust and the like entering the clamp of the present invention will be described.

The sealing part 320 includes an upper cap 321, a lower cap 323, and a housing 322. The upper cap 321 of the seal 320 is fixed above the flange 316 as described above, the housing 322 serves to connect the lower cap 323 and the upper cap 321. .

These upper caps and

lower caps

321 and 323 and the housing 322 are fastened in a bolt / nut structure, and are fastened as described above and formed by welding 329a and 329b to prevent mutual rotation. If the welding is not ensured, the upper and

lower caps

321 and 323 and the housing 322 may be released, and then the space between the close contact portion 340 and the footrest 400 may be spaced apart, leading to a safety accident.

The dust blocking means of the sealing unit 320 is preferably O-ring (O-RING, 325a, 325b) formed of nitrile rubber or a polymer material. The O-rings are formed along the inner surfaces of the upper cap 321 and the lower cap 323, respectively, to effectively block dust and the like from the upper and lower portions of the clamp. If dust or cement flows into the fastening part such as a screw thread, it does not function as a bolt / nut and becomes fixed. Therefore, by inserting these O-

rings

325a and 325b, the clamp life is extended and dismantled for reuse. You can even streamline your work.

In addition, the lower cap 323, which is one of the dust inflow preventing devices, is characterized in that the bottom surface is formed with a concave surface 327 recessed inwardly. As shown in FIG. 8, the concave surface 327 may function to effectively discharge the contaminants such as paint into the gap between the lower cap 323 and the east / south part 330.

10 is a perspective view of a clamp according to another embodiment of the present invention, Figure 11 is an exploded perspective view of the clamp shown in Figure 10, in this embodiment the fastening means 300 fastened by applying a double nut 313 ' It is configured to prevent this loosening.

In the other configuration is the same as the above-described embodiment, detailed description thereof will be omitted, and only the loosening prevention structure of the fastening means 300 using the double nut 313 'will be briefly described.

As shown in FIG. 11, a double bolt portion 317 is formed upward with respect to the flange 316 of the pivot body 311, and a double nut 313 ′ is connected to the pivot head 312 and the flange. It is mounted between 316.

Therefore, after turning the rotating head 312 to close contact with the footrest 340 by pressing the work platform, the double nut 313 'can be tightened to prevent the rotation part 310 from being loosened.

When dismantling the fastening means 300, first unscrew the double nut 313 ', and then lift the close contact portion 340 pressurizing the scaffold by turning the rotating head 312 can be disassembled.

It is obvious that any type of invention that can be easily modified at the level of those skilled in the art even if it is replaced or replaced with an element having the same or similar function as the configuration of the clamp according to the present invention belongs to the scope of the clamp of the present invention.

Claims

A holding main body which is vertically fastened to a safety rail horizontally installed to prevent a fall;

Support means installed at a lower portion of the support main body to support a bottom of a working scaffold;

In the clamp formed on one side of the support main body having a fastening means for clamping in the vertical direction together with the support means,

A lower portion of the fastening means has a close contact portion for pressing the working scaffold while directly contacting the working scaffold;

It is provided with a predetermined protrusion downward, Shanghai East portion coupled by the contact portion and the predetermined coupling means through the protrusion;

A rotating part fastened to the shanghai east part by a bolt / nut coupling at an upper part of the shanghai east part, and loosening the bolt / nut by rotating the head, such that the shanghai east part makes a linear motion in a downward direction;

A clamp comprising a sealing part having a dust blocking means therein while surrounding the outer circumferential surfaces of the shanghai eastern part and the rotating part.
The method according to claim 1,

The close contact portion is a hollow hemispherical shape, the upper portion of the clamp is characterized in that the flat to match the jaw face where the east and shanghai meet.
The method according to claim 2,

The area of the outer circumference of the bottom surface of the hemispherical contact portion in the hemispherical shape is larger than the cross-sectional area of the shanghai east part.
The method according to claim 1,

The protrusion of the lower end of the east-east part, is connected through a hole formed in the upper portion of the contact portion, a groove is formed along the outer peripheral surface of the lower end of the protrusion, a spring pin is inserted into the groove, the spring pin and the contact portion Clamp, characterized in that the flat contact between the side washer provided.
The method according to claim 1,

A protrusion formed at the lower end of the shanghai east part is connected through a hole formed in the center of the upper part of the contact part, and a contact part washer is fitted to the outer circumferential surface of the protrusion part, and a split pin is fixed to a hole formed laterally at the lower part of the protrusion part. Clamp which is characterized in that.
The method according to claim 1,

The shanghai east portion is formed with a screw thread inside the upper end portion, the lower portion of the rotating body body of the rotating part is formed with a bolt portion corresponding to the thread, the flange is formed in the upper position of the bolt portion along the central peripheral surface of the rotating body body Clamp which is characterized in that.
The method according to claim 6,

The outer circumferential surface of the east-east part of the shank is formed in a cylindrical shape, and a flat part is formed to be flattened at a predetermined width from a position lowered by a predetermined length from the top thereof to a lower end, and a key having a shape corresponding to the flat part is formed in the sealing part. The clamp, characterized in that formed on the bottom of the lower cap provided on the lower side.
The method according to claim 7,

The internal thread of the bolt portion and the shangdong portion of the bolt nut structure, characterized in that the rectangular thread shape.
The method according to claim 1,

Clamps, characterized in that the rotating head of the top of the rotating part is formed of a polygon, such as square head, hexagon head.
The method according to claim 9,

And a flat rotating part washer is inserted between the rotating head and the upper end of the sealing part.
The method according to claim 10,

Clamps, characterized in that the flange is formed on one side of the outer circumferential surface of the rotating body evenly projecting along the circumference, the sealing portion is fixed between the bottom surface of the rotating head and the upper surface of the flange.
The method according to claim 11,

The sealing part is composed of an upper cap, a housing and a lower cap, which are fastened in a mutual bolt / nut structure, and are formed to prevent loosening of the fastened state by welding the connection part in a fully fastened state. clamp
The method according to claim 12,

The dust blocking means of the sealing portion is an O-ring formed of nitrile rubber or a polymer material, characterized in that formed along the inner surface of the upper cap and the lower cap, respectively.
The method according to claim 13,

Clamp, characterized in that the bottom surface of the lower cap is formed as a concave surface.
The method according to claim 1,

The close contact is a heat treatment to the clamp characterized in that to use a high strength steel material.
The method according to claim 1,

Clamps, characterized in that the double nut is installed on the head of the rotating part to prevent loosening after installation.