KR101801519B1 - Tower crane tower with openable door - Google Patents

Abstract

Disclosed is a tower cranes with a protective door which can be opened and closed. The tower crane comprises: a protective door frame disposed on a worker path of the tower crane and coupled to a support of the tower crane, the guard door frame including a rectangular bottom frame and side wall frames provided on at least three sides of the bottom frame; an intrusion prevention net blocking an open central portion of the bottom frame, and having an open partial area to form an entrance through which the worker enters and exits; an opening/closing door installed to slide on the bottom frame, opening/closing the entrance; and a door opening/closing unit configured to open and close the opening/closing door. It is possible to prevent an unauthorized person from entering the tower crane by installing the opening/closing door that automatically opens/closes a passageway by a wireless remote control system, a card key system, a fingerprint system or the like on the worker path of the tower crane.

Description

[0001] Tower crane tower with openable door [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower crane, and more particularly, to a tower crane, which is provided with an opening / closing door that automatically opens / closes a passage on a worker passage of a tower crane by a wireless remote control system, a card key system, The present invention relates to a tower crane provided with a guard door that can be opened and closed to facilitate an operator's access.

The tower crane refers to a fixed crane that looks like a tower. It is developed for loading and unloading of harbors and for high-rise construction. It is installed on a shipboard and a rock wall of a shipyard, It is widely used.

In plant construction, it is also used for bulk work and spool holding.

These tower cranes are divided into jib type and hammer head type depending on the shape of the top part. The jibs (protruding arms) have a rotating frame installed at the top of the tower and attached to the jibs to perform lifting or lowering of the cargo by rotational motion or linear movement of the trolley.

The hammerhead type is equipped with a revolving frame at the top of the tower, and a boom is installed so as to balance the left and right, and the load is shifted horizontally.

It is usually expressed as a weight that can increase the capacity of the crane. Small size is less than 3t, medium size is less than 5t, and large size is more than 5t. The working range is more than 30m, and Free Standing is determined by the strength of the tower.

Compared to derrick crane, it does not need strut and supporting cable. It can rotate 360 degrees with no obstacles in adjacent facilities. Its working range is wide and its working capacity is twice that of other crane.

When installing it, consideration should be given to dismantling the machine after completion of the work. In use, it shall be equipped with an overload protection device operating under 105% of the rated load in accordance with the Technical Guidance on Protection Measures of Tower Crane, and shall be equipped with overload protection devices, Limitation devices such as undulation limiters, rope restraints, gimbals telescoping limiters, and performance limiters that limit the speed of ascension, descent, and undulation should be attached.

However, such a tower crane is very large and has a variety of safety devices and operating devices, so it is very difficult to handle and requires a lot of space, so that it can be used only as a limited use of an authorized professional driver, It has a disadvantage in that accessibility to a person or the like irrespective of the work is easy due to the characteristics of the user.

Therefore, there are concerns about manipulation and operation by unauthorized persons, and in recent years, demonstrators or suicidal people often climb up a crane, creating a very dangerous situation.

Document 1: Registration Utility Model No. 20-0417896 (registered on May 26, 2006) Document 2: Published Patent Application No. 10-2011-0110496 (published on October 7, 2011)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is a primary object of the present invention to provide an opening / closing door for automatically opening / closing a passageway by a wireless remote control system, a card key system, The present invention provides a tower crane provided with a guard door that can be opened and closed to prevent unauthorized entry and exit of a person and to easily open and close the worker.

According to one aspect of the present invention for achieving the above object, there is provided a tower crane, comprising: a rectangular bottom floor frame disposed on a worker passage of a tower crane, A guard door frame comprising a side wall frame; An intrusion prevention network for blocking an open central portion of the bottom frame, wherein the intrusion prevention network forms an entrance through which an operator opens and closes a part of the opening; An opening / closing door that is slidably installed on the floor frame to open / close the doorway; And a door opening and closing means for opening and closing the opening and closing door, wherein the door opening and closing means includes a machine room box fixed to the side wall frame and disposed at one side of the inside of the guard door frame, An idle wheel disposed horizontally and spaced apart from the drive wheel while being installed inside the machine room box; and an idle wheel disposed at a predetermined distance from the drive wheel, the idle wheel being axially coupled to the drive motor, A chain belt which connects the driving wheel and the idle wheel in an endless track form and is connected to the opening and closing door via a bracket, a first guide rail fixed to a lower portion of the machine room box, A second guide rail fixed to the side wall frame of the guard door frame and disposed on the other side of the upper side of the opening and closing door, A first guide roller which is fixed to one side of the upper surface of the opening and closing door and is combined with the first guide rail and a second guide roller which is fixed to the other side of the upper surface of the opening and closing door and is combined with the second guide rail, Tower cranes with available guard doors are provided.

Preferably, an auxiliary guide rail for guiding an auxiliary guide roller rotatably installed on an upper end of the bracket is provided on the inner surface of the side wall fixed to the guard door frame of the machine room box. crane.

In accordance with another aspect of the present invention, there is provided a tower crane, comprising: a tower crane; a tower crane; a tower crane; a tower crane; Door frame; An intrusion prevention network for blocking an open central portion of the bottom frame, wherein the intrusion prevention network forms an entrance through which an operator opens and closes a part of the opening; An opening / closing door that is slidably installed on the floor frame to open / close the doorway; And a door opening / closing means for opening and closing the opening / closing door, wherein the door opening / closing means includes a machine room box fixedly installed on a side wall frame disposed at one side of the inside of the guard door frame, A driving wheel rotated by the rotational power of the driving motor while being axially coupled to the driving motor; an idle wheel disposed horizontally spaced apart from the driving wheel while being spaced apart from the driving wheel; A chain belt which connects the driving wheel and the idle wheel in an endless track form and is connected via the opening and closing door and the bracket, and a chain belt which is provided on the inner surface of the side wall of the machine room box fixed to the side wall frame, And a second guide rail fixed to the side wall frame of the guard door frame, A first guide roller rotatably coupled to an upper portion of the bracket and assembled with the first guide rail, and a second guide rail fixed to the other side of the upper surface of the opening and closing door, And a second guide roller which is provided on the front side of the tower crane.

Preferably, the drive motor disclosed in one aspect and another aspect may be driven by any one of a wireless remote controller, a card key module, and a fingerprint recognition module.

As described above, according to the present invention disclosed in the solution means of the present invention, an opening / closing door for automatically opening / closing a passage is provided on a worker passage of a tower crane by a wireless remote control system, a card key system, Can be prevented from unauthorized access to the tower crane, and an operator can easily enter and leave the building by automatically opening and closing the opening and closing door.

1 is a schematic view of a typical tower crane;
FIG. 2 is a perspective view of a tower crane equipped with an openable and closable guard door according to a first embodiment of the present invention. FIG.
3 is a vertical sectional view of the installed state of the tower crane shown in Fig. 2
Fig. 4 is a plan view of Fig. 3
5 is a longitudinal sectional view of a tower crane equipped with an openable and closable guard door according to a second embodiment of the present invention
Fig. 6 is a plan view

The specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

FIG. 2 is a perspective view of a tower crane equipped with an openable and closable guard door according to a first embodiment of the present invention. FIG. 3 is a perspective view of a tower crane shown in FIG. Fig. 4 is a plan view of Fig. 3; Fig.

Referring to FIGS. 1 to 4, a tower crane having a guard door capable of opening and closing according to a first embodiment of the present invention is mounted on a worker's path 2 of a tower crane 1, as shown in FIG. 1 A guard door for automatically opening and closing the passageway is installed so that only the operator or the authorized person can enter and exit by a wireless remote control system, a card key system, a fingerprint identification system, or the like.

Specifically, the tower crane equipped with the openable and closable guard door according to the first embodiment has the guard door frame 200. The guard door frame 200 is disposed on the worker path 2 of the tower crane 1 and is connected to the column 3 of the tower crane 1 and has a rectangular bottom frame 210, And a side wall frame 220 provided on at least three sides.

In addition, the tower crane equipped with the guard doors capable of opening and closing according to the first embodiment has the intrusion prevention network 300. The intrusion prevention network 300 blocks an open central portion of the bottom frame 210 to block intrusion of the outside, and a part of the area is opened to form an entrance 310 through which an operator enters and exits.

The tower crane having the guard door capable of opening and closing according to the first embodiment has an opening and closing door 400 that is slidably installed in the floor frame 210 and opens and closes the entrance 310. Here, the opening and closing door 400 is formed by bending a metal plate having a predetermined thickness into a 'C' shape, and then folding the upper end portion 410 and the lower end portion 420 in a two- As shown in Fig.

Since the opening and closing door 400 is formed by bending a metal plate, safety is ensured only when mechanical properties such as strength are secured. Therefore, it is preferable to apply a surface strengthening coating so that strength can be assured while using a relatively thin metal plate. The surface-strengthening coating has an advantage that the opening / closing door 400 is always exposed to the outside due to the characteristics of the tower crane, and thus can be less affected by external environments such as temperature changes, rainwater, direct sunlight and the like.

The surface-strengthening coating agent is an aqueous epoxy composition comprising 100 parts by weight of an epoxy base resin component and 5-40 parts by weight of a curing component, wherein the epoxy base resin comprises 10 to 50% by weight of an epoxy resin, 1 to 20% by weight of flocculant, 0.1 to 5% by weight of flocculant, 1 to 20% by weight of inorganic filler, 0.1 to 5% by weight of accelerator, 0.1 to 20% by weight of emulsifier and 5-50% 0.1 to 20% by weight of at least one compound selected from the group consisting of triethylenetetramine and diethylenetriamine, 10 to 50% by weight of aniline, 0.1 to 20% by weight of an emulsifier, 0.1 to 20% by weight of an accelerator, 10% by weight of water and 5-30% by weight of water.

The epoxy resin may be an epoxy resin commonly used in the field to which the present invention pertains, and may be a general epoxy resin, an epoxy resin containing chlorine, or a mixture thereof. It is also possible to use one or more materials commonly used in the fields of the present invention such as acryl, urethane, fiber reinforced plastic (FRP), and latex resin.

Examples of the liquid epoxy resin include R1475, KEM-128M, KEM-128-70, KEM-134-60, EM-101-50, KEM-172-60, KEM-638-60, KEM -500-90P40, R-1039, R-1415-1 and R-1508, and mixtures of at least one selected from the above classes may be used.

Wherein the reactive diluent is selected from the group consisting of butyl glycidyl ether, novinyl glycidyl ether, carboxylyl glycidyl ether, hexanediol diglycidyl ether, butanediol diglycidyl ether, and epoxy glycidyl ether Or more, and other monoepoxy, diepoxy, and triepoxy diluents may be used, but the present invention is not limited thereto.

The flocculant is preferably at least one selected from the group consisting of silicon dioxide, aerosil, caramelite, silicic anhydride, and asbestos, but is not limited thereto.

The inorganic filler is preferably at least one selected from the group consisting of calcium carbonate, talc, heavy carbon, silica and dolomite, but is not limited thereto.

Examples of the accelerator include, but are not limited to, phenol accelerator, nonylphenol accelerator, tertiary amine, mercaptans, K-54 and A-399.

The emulsifier may be at least one reactive emulsifier selected from the group consisting of a copolymer of polyoxyethylene and polyoxypropylene, a copolymer of polyoxyethylene and polyoxyethylene phenyl ether, and sodium dodecylbenzene sulfide. no.

The water may be water generally used, such as tap water, water, water, ground water, green water, soft water, hard water, and the like, and is not particularly limited.

The aqueous epoxy composition may further contain additives such as a drying agent, a flame retardant, and an antifoaming agent in addition to the above components. As the drying agent, calcium oxide, copper sulfate, phosphorus pentoxide and the like may be used and the flame retardant may be pentabromodiphenyloxide And decabromodiphenyl oxide. The defoaming agent may be a commercially available polysiloxane defoaming agent, but is not limited thereto.

The tower crane having the guard doors capable of opening and closing according to the first embodiment has a door opening / closing means 500 for opening and closing the opening and closing door 400.

Here, the door opening / closing means 500 has a machine room box 510. The machine room box 510 may be fixed to the side wall frame 220 while being disposed at one side of the inside of the guard door frame 200, Any bolting method is recommended but any fixing method can be applied if the bonding force is ensured.

In addition, the door opening / closing means 500 has a driving motor 520 installed inside the machine room box 510. The driving motor 520 is a main power source for sliding the opening and closing door 400. The power supplied to the driving motor 520 is supplied from a tower distribution panel (not shown), and a single-phase motor can be applied.

The door opening / closing means 500 has a driving wheel 530 which is axially coupled to the driving motor 520 and is rotated by the rotational power of the driving motor.

The door opening and closing means 500 has an idle wheel 540 disposed inside the machine room box 510 and horizontally spaced apart from the driving wheel 530 at a predetermined interval.

The door opening and closing means 500 connects the driving wheel 530 and the idle wheel 540 in an endless track manner and is connected to the opening and closing door 400 through a bracket 560 ). Here, the chain belt 550 has advantages of less tension and shrinkage due to seasonal changes and a long aging period, so that the chain belt 550 can be usefully used in a place where safety must be ensured like the present apparatus.

The door opening and closing means 500 has a first guide rail 571 fixed to a lower portion of the machine room box 510 and disposed on one side of the opening and closing door 400. The first guide rail 571 has a rectangular cross section and the inner lower surface thereof serves as a rolling guide surface of a first guide roller to be described later. At this time, it is preferable that the inner bottom surface is formed with a separation preventing jaw to prevent the first guide roller from being separated.

The door opening and closing means 500 has a second guide rail 572 which is fixed to the side wall frame 220 of the guard door frame 200 and is disposed on the other side of the upper side of the opening and closing door 400. The second guide rail 572 has the same configuration as the first guide rail 571 described above, and thus a detailed description thereof will be omitted.

The door opening and closing means 500 is coupled to the first guide rail 571 while being fixed to one side of the upper surface of the opening and closing door 400 and rotates along the longitudinal direction of the first guide rail 571 1 guide rollers 581. Here, the first guide roller 581 is configured to have a dual roller so that stable rolling is possible.

The door opening and closing means 500 is coupled to the second guide rail 572 while being fixed to the other side of the upper surface of the opening and closing door 400 and rotates along the longitudinal direction of the second guide rail 572 2 guide rollers 582. Here, the second guide roller 582 has the same dual roller structure as the first guide roller 571, which enables stable rolling.

Meanwhile, the tower crane having the guard door capable of opening and closing according to the first embodiment may further include an auxiliary guide rail 591 and an auxiliary guide roller 592 for stable sliding operation of the opening and closing door 400.

The auxiliary guide rail 591 is formed to protrude from the inner surface of the side wall of the machine room box 510. The auxiliary guide roller 592 is rotatably installed on the upper end of the bracket 560, And is rolled along the longitudinal direction of the rail 591. The auxiliary guide rail 591 and the auxiliary guide roller 592 are disposed between the first and second guide rails 571 and 572 to help stabilize the sliding operation of the opening / .

Next, a configuration of a tower crane equipped with an opening / closing guard door according to a second embodiment of the present invention will be described.

FIG. 5 is a longitudinal sectional view of a tower crane having a guard door capable of opening and closing according to a second embodiment of the present invention, and FIG. 6 is a plan view of FIG.

The second embodiment is the same as the first embodiment, except that there is a difference in the guide structure. Therefore, for the same configuration, redundant description will be avoided and only the difference structure will be described.

That is, the structure of the machine room box 510, the driving motor 520, the driving wheel 530, the idle wheel 540, and the chain belt 550 in the door opening / closing means 500 of the second embodiment is the same.

The first guide rail 581 assembled with the first guide rail 571 is integrally provided on the inner surface of the side wall of the machine room box 510. The first guide roller 581 is rotatably mounted on the upper portion of the bracket 560, Possibly combined points are different.

Although the guide structure of the opening and closing door 400 is a dual guide structure unlike the first embodiment of the triple guide structure, the stability of the guide may be relatively weakened, but there is no problem in operation, There is a relative merit that the manufacturing cost is lower than that in the first embodiment by efficiently configuring the structure of the first electrode 571.

On the other hand, in the first and second embodiments, the drive motor 520 can be driven by any one of a wireless remote controller, a card key module, and a fingerprint recognition module. In the case of the wireless remote controller, when the operator operates the wireless remote controller with the wireless remote controller, a signal is transmitted to the driving motor 520 to open the door 400. After passing through the entrance 310, The opening / closing door 400 is closed by the driving motor 520. Since the opening and closing door 400 can be automatically opened and closed, there is an advantage that an operator can easily enter and exit the entrance 310.

On the other hand, the anti-fouling coating layer coated with the anti-fouling coating composition may be formed around the driving wheel 530 so as to effectively prevent and remove the adhesion of the contaminants. The antifouling coating composition contains hydrogen peroxide and sodium metasilicate in a molar ratio of 1: 0.01 to 1: 2, and the total content of hydrogen peroxide and sodium metasilicate is 1 to 10 wt% with respect to the total aqueous solution. In addition, sodium metasilicate or calcium carbonate may be used as the material for improving the coating property of the anti-fouling coating layer, but sodium metasilicate is preferably used. The hydrogen peroxide and sodium metasilicate are preferably in a molar ratio of 1: 0.01 to 1: 2, and when the molar ratio is out of the above range, the coating property of the substrate is lowered or the moisture adsorption on the surface after coating is increased to remove the coating film have.

The hydrogen peroxide and sodium metasilicate are preferably used in an amount of 1 to 10% by weight based on the total weight of the composition. When the amount of the hydrogen peroxide is less than 1% by weight, the applicability of the base material is deteriorated. Precipitation tends to occur.

As a method of applying the composition for anti-fouling coating on a substrate, it is preferable to apply the coating composition by a spray method. In addition, the thickness of the final coating film on the driving wheel 530 is preferably 500 to 2000 angstroms, more preferably 1000 to 2000 angstroms. When the thickness of the coating film is less than 500 ANGSTROM, there is a problem that it deteriorates in the case of a high-temperature heat treatment. When the thickness is more than 2000 ANGSTROM, crystallization of a coated surface tends to occur.

Further, the composition for antifouling coating can be prepared by adding 0.1 mol of hydrogen peroxide and 0.05 mol of sodium metasilicate to 1000 mL of distilled water, followed by stirring.

In addition, the outer surface of the driving motor 520 can be coated with a discoloring portion whose color changes according to the temperature. The discoloring portion is applied to the surface of the driving motor 520 by separating two or more temperature-color-changing materials whose color changes when the temperature is equal to or higher than a predetermined temperature to two or more intervals according to the temperature change, , And a protective film layer is applied on the discolored portion to prevent the discolored portion from being damaged.

Here, the discoloring portion may be formed by applying a temperature discoloring material having a discoloration temperature of not less than 40 DEG C and not less than 60 DEG C, respectively. The discoloring portion is for detecting a change in the temperature of the paint by changing the color according to the temperature of the driving motor 520.

The discoloring portion may be formed by applying a coloring material having a color change to the surface of the driving motor 520 when the temperature of the discoloring portion is higher than a predetermined temperature. In addition, the temperature discoloring substance is generally composed of a microcapsule structure having a size of 1 to 10 탆, and the microcapsules can exhibit a colored and transparent color due to the bonding and separation phenomenon depending on the temperature of the electron donor and the electron acceptor.

In addition, the temperature-changing materials can change color quickly and have various coloring temperatures such as 40 ° C, 60 ° C, 70 ° C, and 80 ° C, and such coloring temperature can be easily adjusted by various methods. Such a temperature-coloring material may be various kinds of temperature-coloring materials based on principles such as molecular rearrangement of an organic compound and spatial rearrangement of an atomic group.

For this purpose, it is preferable that the discoloring unit is formed so as to be divided into two or more sections according to the temperature change by applying two or more temperature-coloring materials having different discoloration temperatures. The temperature-coloring layer preferably uses a temperature-coloring material having a relatively low temperature of the discoloration temperature and a temperature-discoloring material having a relatively high discoloration temperature, more preferably a discoloration temperature of not lower than 40 ° C and not lower than 60 ° C A color change portion can be formed by using a temperature coloring material.

Accordingly, the temperature change of the driving motor 520 can be checked step by step, so that the temperature change of the paint can be sensed. Accordingly, the driving motor 520 can be operated in an optimal state, 520 can be prevented from being damaged in advance.

In addition, the protective film layer is coated on the discolored portion, thereby preventing the discolored portion from being damaged due to external impact, easily recognizing discoloration of the discolored portion, and considering the weakness of the temperature discolored material, Is preferably used.

The guard door frame 200 may be made of a metal material. The guard door frame 200 made of metal may be coated with a surface coating material such as metal surface coating material to prevent corrosion of the surface from dust, Layer may be formed. The surface protective coating layer is composed of 2.5% by weight of zirconium powder, 60% by weight of alumina powder, 30% by weight of NH ₄ Cl, 2.5% by weight of zinc, 2.5% by weight of magnesium and 2.5% by weight of titanium.

The zirconium powder is excellent in corrosion resistance and heat resistance. These zirconium powders were mixed at 2.5 wt%. If the mixing ratio of the zirconium powder is less than 2.5% by weight, the corrosion resistance and the heat resistance are not greatly improved. On the other hand, when the mixing ratio of the zirconium powder exceeds 2.5% by weight, the above-mentioned effect is not further improved, but the material cost is greatly increased. Therefore, titanium is preferably mixed at 2.5% by weight.

The alumina powder is added for the purpose of sintering, entangling, fusion prevention, etc. when heated to a high temperature. When such an alumina powder is added in an amount of less than 60% by weight, the effect of sintering, entangling and fusion prevention is deteriorated. When the alumina powder exceeds 60% by weight, the above effect is not further improved, but the material cost is greatly increased. Therefore, it is preferable to add 60 wt% of the alumina powder.

The NH ₄ Cl reacts with zinc and magnesium in a vapor state to activate diffusion and penetration. This NH ₄ Cl is added in an amount of 30% by weight. When NH ₄ Cl is added in an amount of less than 30% by weight, reaction with zinc or magnesium in a vapor state is not properly performed, and thus diffusion and penetration are not activated. On the other hand, if NH ₄ Cl exceeds 30 wt%, the above-mentioned effect is not further improved, but the material cost is greatly increased. Therefore, it is preferable to add 30 wt% of NH ₄ Cl.

The zinc is compounded to prevent corrosion of the metal that is in contact with water and to be used for electrical applications. 2.5% by weight of this zinc is mixed. If the mixing ratio of zinc exceeds 2.5% by weight, corrosion of the metal which is in contact with water can not be properly prevented. On the other hand, when the mixing ratio of zinc exceeds 2.5% by weight, the above-mentioned effect is not further improved, but the material cost is greatly increased. Therefore, it is preferable that zinc is mixed at 2.5% by weight.

Since the pure metal of magnesium has a low structural strength, it is used in combination with the zinc and the like to improve the hardness, tensile strength and corrosion resistance of the metal. This magnesium is mixed at 2.5% by weight. When the mixing ratio of magnesium is less than 2.5% by weight, the hardness, the tensile strength and the corrosion resistance to the salt water of the metal are not greatly improved when they are combined with zinc and the like. On the other hand, when the mixing ratio of magnesium exceeds 2.5% by weight, the above-mentioned effect is not further improved, but the material cost is greatly increased. Therefore, it is preferable that magnesium is mixed with 2.5% by weight.

The titanium is a lightweight, hard and corrosion resistant transition metal element with a silver-white metallic luster. Because it has excellent corrosion resistance and specific gravity, it weighs only 60% of steel. Therefore, the weight of the coating material applied to the metal base material is reduced, Excellent water resistance and corrosion resistance.

This titanium is mixed at 2.5% by weight. If the mixing ratio of titanium is less than 2.5% by weight, the weight of the coating material applied to the metal base material is not so reduced, and glossiness, water resistance and corrosion resistance are not greatly improved. On the other hand, when the mixing ratio of titanium exceeds 2.5% by weight, the above effect is not further improved, but the material cost is greatly increased. Therefore, titanium is preferably mixed at 2.5% by weight.

The method of applying the surface of the guard door frame 200 according to the present invention is as follows.

The base material on which the surface protective coating layer is to be formed and the coating material combined with the above composition are put into a closed furnace together with argon gas at a rate of 2 L / min in order to prevent oxidation of the base material. Is maintained at a temperature of 700 ° C to 800 ° C for 4 to 5 hours.

The zirconium powder, the alumina powder, the zinc, the magnesium and the titanium compound penetrate into the surface of the base material to form the surface protective coating layer. The zirconium powder, the alumina powder, the zinc, the magnesium and the titanium, .

After the surface protective coating layer is formed, the temperature inside the closed chamber is maintained at a temperature of 800 ° C. to 900 ° C. for 30 to 40 hours to form an anti-corrosive surface protective coating layer on the surface of the base material. Thereby isolating the outside air. At this time, the abrupt temperature change in performing the above process may cause a temperature change at a rate of 60 ° C / hr because the surface protective coating layer on the surface of the base material may be peeled off.

The surface protective coating layer of the present invention has the following advantages.

Since the surface protective coating layer of the present invention has a very wide range of applications, it can be applied by various methods such as curtain coating, spray painting, dip coating, flooding and the like.

The surface protective coating layer of the present invention can be coated with a very thin layer thickness in addition to the principle protection against corrosion and / or scale, thereby improving electrical conductivity as well as material and cost reduction. A thin electrically conductive primer may be applied to the top of the application layer if high electrical conductivity is desired after the hot forming process.

After the molding process or the hot forming process, the coating material can be retained on the surface of the substrate, for example, to increase scratch resistance, to improve corrosion protection, to meet aesthetic appearance, to prevent discoloration, And may be provided as a primer for conventional downstream processes (e.g., impregnated and electro-mobile dip application).

Since the surface protection coating layer made of zirconium powder, alumina powder, NH ₄ Cl, zinc, magnesium and titanium is applied to the guard door frame 200 of the present invention, the surface of the protection door frame 200 from dust, Corrosion phenomenon can be prevented.

Further, the opening and closing door 400 may be coated with a perfume material having a sterilizing function.

The functional oil may be mixed with 95 to 97% by weight of a perfume and 3 to 5% by weight of a functional oil. The functional oil may contain 50% by weight of myrtle oil, And 50% by weight of a cube oil (Litsea cubeba oil).

Here, the functional oil is preferably mixed with 3 to 5% by weight based on the perfume. If the mixing ratio of the functional oil is less than 3% by weight, the effect is insignificant. If the mixing ratio of the functional oil exceeds 3 to 5% by weight, the function is not greatly improved, but the manufacturing cost is greatly increased.

The major chemical components of myrtle oil are cineol and myrtenol. It is extracted by steam distillation method in sprout and small branches. It is yellowish and has a refreshing and refreshing aroma. It has good effect on sterilization and side effects.

Litsea cubeba oil extracts oil from fruit using steam distillation method. It is sweet but similar to lemon grass. It has a strong aroma. It contains citral which is more than 85% as main chemical ingredient, linalol, neral, etc. It has a strong antiseptic effect, and it has excellent action effect of killing bacteria and the like by bactericidal action.

As the functional oil is coated on the opening / closing door 400, since the opening and closing door 400 is sterilized, the health of the operator can be protected from bacteria and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

200: Protective door frame 210: Floor frame
220: side wall frame 300: intrusion prevention network
310: doorway 400: opening / closing door
410: upper end portion 420: lower end portion
500: door opening / closing means 510: machine room box
520: drive motor 530: drive wheel
540: idle wheel 550: chain belt
560: Bracket 571: First guide rail
572: second guide rail 581: first guide roller
582: second guide roller 591: auxiliary guide rail
592: Auxiliary guide roller

Claims (3)

delete delete A rectangular frame 210 coupled to the column 3 of the tower crane and disposed on the worker's path 2 of the tower crane 1 and at least three sides A guard door frame 200 comprising a side wall frame 220;
An intrusion prevention network 300 for blocking the open central portion of the bottom frame 210 and forming an entrance 310 through which a worker may enter and exit by opening a partial area;
An opening / closing door (400) slidably installed on the floor frame (210) for opening / closing the entrance (310); And
And door opening and closing means 500 for opening and closing the opening and closing door 400,
The door opening and closing means 500 includes a machine room box 510 fixedly installed on the side wall frame 220 disposed on one side of the inside of the guard door frame 200, A drive wheel 530 rotated by the rotational power of the drive motor while being axially coupled to the drive motor 520 and a drive wheel 530 installed inside the machine box 510, An idle wheel 540 disposed horizontally spaced apart from the idle wheel 540 at predetermined intervals and an idle wheel 540 connected to the idle wheel 540 in an endless track manner and interposed between the opening and closing door 400 and the bracket 560 A first guide rail 571 provided on an inner surface of the side wall of the machine room box 510 fixed to the side wall frame 220 and disposed on one side of the upper side of the opening and closing door 400, (220) of the guard door frame (200), and the opening / closing door A first guide roller 581 rotatably coupled to the upper portion of the bracket 560 and assembled with the first guide rail 571, A second guide roller 582 fixed to the other side of the upper surface of the opening / closing door 400 and combined with the second guide rail 572;
The drive motor 520 is driven by any one of a wireless remote controller, a card key module, and a fingerprint recognition module;
An auxiliary guide rail 591 for guiding an auxiliary guide roller 592 rotatably mounted on the upper end of the bracket 560 is installed on the inner surface of the side wall fixed to the guard door frame 200 of the machine room box 510 ;
The surface-strengthening coating agent is an aqueous epoxy composition comprising 100 parts by weight of an epoxy base resin component and 5 to 40 parts by weight of a curing component, wherein the epoxy base resin is an epoxy resin, From 0.1 to 5% by weight of an emulsifier, from 5 to 50% by weight of an emulsifier, and from 1 to 20% Wherein the curing component is selected from the group consisting of 10 to 60% by weight of polyoxypropylene diamine, 0.1 to 20% by weight of at least one compound selected from triethylenetetramine and diethylenetriamine, 10 to 50% by weight of aniline, 0.1 to 20% 0.1 to 10% by weight of an accelerator, and 5-30% by weight of water;
The antifouling coating composition includes hydrogen peroxide and sodium metasilicate in a molar ratio of 1: 0.01 to 1: 2, and the anti-fouling coating layer is coated on the periphery of the driving wheel 530.
The discoloring portion of which the color changes according to the temperature is applied to the outer surface of the driving motor 520. The discoloring portion is coated on the surface of the driving motor 520 with two or more coloring materials whose color changes when the temperature is equal to or higher than a predetermined temperature A stepwise temperature change can be judged by separating into two or more sections according to a temperature change, and a protective film layer is applied on the discoloring section to prevent the discoloring section from being damaged;
A surface protective coating layer is formed on the protective door frame 200 by a surface coating material of a metal material. The surface protective coating layer comprises 2.5% by weight of zirconium powder, 60% by weight of alumina powder, 30% by weight of NH ₄ Cl, 2.5% by weight of magnesium, and 2.5% by weight of titanium;
The perfume material is mixed with the perfume material, and the mixing ratio of the perfume material to the functional oil is from 95 to 97% by weight of the perfume material, And 5% by weight of the functional oil, and the functional oil is composed of 50% by weight of myrtle oil and 50% by weight of Litsea cubeba oil. .

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