KR101952578B1 - Steel pipe rotating device - Google Patents

Abstract

The present invention relates to a steel pipe rotating device realized to rotate a steel pipe in accordance with necessity of a user when welding or cutting the steel pipe, which comprises: a rotation roller having a first rotation roller and a second rotation roller supporting a front end or a rear end of a lower portion of the steel pipe and rotating; and a rotation drive unit directly connected to and installed in the first rotation roller to rotate the first rotation roller.

Description

{STEEL PIPE ROTATING DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe rotating device, and more particularly, to a steel pipe rotating device implemented to rotate a steel pipe according to a user's need when welding or cutting a steel pipe.

Generally, the manufacturing process of a large-diameter steel pipe having a large diameter includes an improvement angle process in which an improvement angle is machined on both end welds of the steel plate by introducing the steel plate, a bending process for bending the improved steel plate, An inner welding step of butt-welding the inner portion of each processed steel tube and a deep machining step (hereinafter referred to as a joint machining step) for seam-machining the outer portion of the steel pipe subjected to the improved angle machining. An outer welding process for welding the outer improvement angle machining portion of the jointed steel pipe, and a discharge process for discharging the finished steel pipe.

In the steel pipe manufacturing process, a process of machining a bent steel plate to prevent welding defects is a joining process. When the steel plate is bent and the inner portion is welded, a slug or bubble And the welded portion including the welded portion is welded again. If the welded portion is welded again, the welded portion becomes defective. As a result, serious defects are caused in the welded portion of the steel pipe due to bubbles, slag inclusion, To prevent this, a joint processing step is required.

The conventional steel pipe processing apparatus has a problem that it is not only inconvenient to rotate the steel pipe as much as necessary according to the operator's needs but also has a problem that the steel pipe falls from the rotating roller during the operation and the operator is exposed to a safety accident.

On the other hand, the background art described above is technical information acquired by the inventor for the derivation of the present invention or obtained in the derivation process of the present invention, and can not necessarily be a known technology disclosed to the general public before the application of the present invention .

Korean Patent No. 10-0803969 Korean Patent Publication No. 10-1997-0017175

One aspect of the present invention provides a steel pipe rotating device implemented to be able to rotate a steel pipe according to a user's need when welding or cutting a steel pipe using a plurality of rotating rollers supporting the steel pipe.

The present invention also provides a steel pipe rotating device that is provided with a separate rotation support member capable of supporting a lower side of a steel pipe while rotating the steel pipe, thereby preventing the steel pipe from falling during operation.

The technical problem of the present invention is not limited to the technical problems mentioned above, and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

A steel pipe rotating apparatus according to an embodiment of the present invention includes a rotating roller including a first rotating roller and a second rotating roller that support a lower front end or a rear end of a steel pipe and rotate; And a rotation driving unit connected to the first rotating roller to rotate the first rotating roller.

A steel pipe rotating apparatus according to another embodiment of the present invention includes a first driving rotating roller and a second driving rotating roller which support a front end or a rear end of one side of a lower portion of a steel pipe, A rotating roller including a first manual rotating roller and a second manual rotating roller that rotate; And a rotation driving unit for rotating the first driving rotation roller and the second driving rotation roller by rotating a driving shaft connected to the first driving rotation roller and the second driving rotation roller, respectively.

In one embodiment, a steel pipe rotating apparatus according to an embodiment of the present invention or a steel pipe rotating apparatus according to another embodiment of the present invention includes a steel pipe rotating support member for supporting a steel pipe supported at a lower side of a steel pipe supported by the rotating roller, Wherein the steel pipe supporting portion includes a support frame installed in the space between the rotating rollers and supporting one side or another side of the steel pipe; A support groove formed in the upper portion of the support frame corresponding to the shape of the steel pipe; A plurality of support rollers installed along an outer circumferential surface of the support groove so that the steel pipe seated in the support groove can be rotated; A plurality of coupling grooves formed at a lower portion of the support frame; And an elastic support portion provided on the coupling groove and supporting the support frame by an elastic force, wherein the elastic support portion includes a first plate, a second plate, a third plate, and a fourth plate formed of " A support comprising a plate; A vibration absorbing part provided between the plate of the support part and the other plate to absorb vibration; Between the upper portion of the first plate and the upper portion of the second plate, between the front end of the second plate and the front end of the third plate, between the lower portion of the third plate and the lower portion of the fourth plate, A second plate, a third plate, and a fourth plate that are installed between the front end of the first plate and the front end of the first plate to connect the first plate, the second plate, the third plate, and the fourth plate; The upper and the front ends of the first plate, the upper and the front ends of the second plate, the front and lower ends of the third plate, and the upper and lower ends of the fourth plate, An extension plate; Four swiveling parts connected to each other such that upper or lower portions of two extension plates extending from each plate are opposed and rotatable; And two support bars provided on the upper or lower side of the rotary part and supported by the rotary part to be spaced apart from each other in the vertical direction to form an interspace, A plate body formed of a plate of the shape of a plate; Two first upper fastening grooves formed on an upper blade of the plate body formed in an upper direction and connected to each other so that a front end of the connecting plate is rotatable; A second upper fastening groove formed between the first upper fastening grooves and connecting the lower portion of the extending plate so as to be rotatable; Two first shear locking grooves formed on front end blades of the plate body formed in a shear direction and connected to each other so that the upper portion of the connecting plate is rotatable; And a second shearing engagement groove formed between the first shearing engagement grooves and connecting the lower portion of the extension plate so as to be rotatable, wherein the extension plate has a second upper engagement groove or a second shear engagement groove A vertical sliding groove may be formed at a lower portion connected to the second upper locking groove or the second front locking groove so as to allow sliding movement in a vertical direction in the groove.

According to one aspect of the present invention, when a steel pipe is welded or cut using a plurality of rotating rollers supporting the steel pipe, the steel pipe is rotated according to the user's needs, thereby rotating the steel pipe to a position required by the operator, And depositing work can be performed, so that the efficiency of the work can be improved.

In addition to the rollers capable of rotating the steel pipe, the steel pipe is provided with a separate rotation support which can rotate while supporting the lower side of the steel pipe. Thus, the steel pipe is dropped during the operation and a safety accident Can be prevented in advance.

1 is a view showing a schematic configuration of a steel pipe rotating apparatus according to an embodiment of the present invention.
2 and 3 are views showing a schematic configuration of a steel pipe rotating apparatus according to another embodiment of the present invention.
4 and 5 are views showing a steel pipe rotating apparatus according to another embodiment.
FIG. 6 is a view showing an example of a steel pipe supporting portion of FIG. 4 or FIG. 5. FIG.
FIG. 7 is a view showing the elastic support portion of FIG. 6. FIG.
FIG. 8 is a view showing the first plate of FIG. 7; FIG.
Fig. 9 is a flowchart for explaining a method for producing a plastic sheet for producing the plastic sheet of the present invention.
Fig. 10 is a view showing another example of the steel tube supporting portion of Fig. 4 or Fig. 5;

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

1 is a view showing a schematic configuration of a steel pipe rotating apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a steel pipe rotating apparatus 10 according to an embodiment of the present invention includes a rotating roller 100 and a rotation driving unit 200.

The rotating roller 100 includes a first rotating roller 110 and a second rotating roller 120 that rotate and support the lower front end or the rear end of the steel pipe 1. [

In one embodiment, the first rotating roller 110 may be installed on the front ends of the front and rear bodies 11 in which the bearings 121 provided on both sides form the shape of the steel pipe rotating device 10, respectively.

At this time, the bearing 121 slides in the forward and backward directions along the longitudinally extending sliding holes 12 formed at the front end of the body 11, and the mounting position can be changed corresponding to the size of the steel pipe 1 .

The rotation driving unit 200 is formed of a step motor or the like for generating driving force and is directly connected to the first rotating roller 110 to rotate the first rotating roller 110.

2 and 3 are views showing a schematic configuration of a steel pipe rotating apparatus according to another embodiment of the present invention.

Referring to FIG. 2, a steel pipe rotating apparatus 20 according to another embodiment of the present invention includes a rotating roller 300 and a rotation driving unit 500.

The rotating roller 300 includes a first driving rotating roller 310 and a second driving rotating roller 320 which support and rotate one side front or rear end of the lower portion of the steel pipe 1, And a first manual rotation roller 330 and a second manual rotation roller 340 which support and rotate one side front end or rear end.

The first driving rotation roller 310 and the second driving rotation roller 320 correspond to rollers that rotate by themselves to receive the driving force from the rotation driving unit 500 to rotate the steel pipe 1, The roller 330 and the second manual rotation roller 340 are rotatably supported by a roller that is manually rotated by a rotational force applied to the steel pipe 1 rotated by the first drive rotation roller 310 and the second drive rotation roller 320 .

The rotation driving unit 500 rotates the driving shaft 510 connected to the first driving rotation roller 310 and the second driving rotation roller 320 to rotate the first driving rotation roller 310 and the second driving rotation roller 320 ).

The first driving rotation roller 310 and the second driving rotation roller 320 are spaced apart from each other in the front and rear direction on the first body 21 provided with the rotation driving part 500 at the front end, And is connected to the driving shaft 510, which is rotated by the driving of the rotation driving unit 500, and is rotated.

3, the second driving rotation roller 320 can receive the driving force of the driving shaft 510 rotating through the gear installed on the driving shaft 510 and the chain 520 engaged with the gear, (530) to rotate the steel pipe (1).

Here, the rotation of the first driving rotation roller 310 is the same as the rotation principle of the second driving rotation roller 320, and a description thereof will be omitted.

Each of the rotating rollers 310, 320, 330 and 340 is connected to a lower portion of a feed shaft 23 or 24 provided in the longitudinal direction along the first body 21 or the second body 22 Can be transferred in the forward and backward directions of the first body 21 or the second body 22 in accordance with the rotation of the thread formed along the outer circumferential surfaces of the transfer shafts 23 and 24.

The steel pipe rotating apparatuses 10, 20 having the above-described construction are constructed such that when a steel pipe is welded or cut using a plurality of rotating rollers for supporting the steel pipe, the steel pipe is rotated according to the user's need, The steel pipe can be rotated to the position to perform the welding or depositing work, thereby improving the efficiency of the work.

4 and 5 are views showing a steel pipe rotating apparatus according to another embodiment.

4 or 5, a steel pipe rotating apparatus 30 according to another embodiment includes rotating rollers 100 and 300, rotation driving units 200 and 500, and a steel pipe supporting unit 600. Here, the rotating rollers 100 and 300 and the rotation driving units 200 and 500 are the same as those in FIG. 1 or FIG. 2, and a description thereof will be omitted.

The steel pipe support unit 600 is installed between the first rotating roller 110 and the second rotating roller 120 of the steel pipe rotating apparatus 10 of FIG. 1 (see FIG. 4) or the steel pipe rotating apparatus 20 of FIG. (See FIG. 5) between the first manual rotation roller 330 and the second manual rotation roller 340, and a space between the first drive rotation roller 310 and the second drive rotation roller 320 Thereby supporting the rotating steel pipe 1.

Here, the structure of the steel pipe supporting portion 600 will be described with reference to FIG. 6 and the following drawings.

The steel pipe rotating device 30 having the above-described structure is provided with a separate rotation support member that can rotate while supporting the lower side of the steel pipe in addition to the rollers capable of rotating the steel pipe, It is possible to prevent a safety accident such as an injury of the worker by the steel pipe which is made of steel.

FIG. 6 is a view showing an example of a steel pipe supporting portion of FIG. 4 or FIG. 5. FIG.

6, the steel pipe supporting part 600 includes a supporting frame 610, a supporting groove 620, a plurality of supporting rollers 630, a plurality of engaging grooves 640, and an elastic supporting part 700.

The support frame 610 is installed in a space between the rotating rollers 100 and 300 and supports the steel pipe 1 on one side or the other side by placing the steel pipe 1 on the support groove 620 formed on the upper side And a plurality of coupling grooves 640 are formed in the lower portion.

At this time, the support frame 610 is not fixedly installed on the upper part of the body 11, 21 or 22 of the apparatus but is supported by the elastic support part 700 described later from the main body 11, 21 or 22 Respectively.

The support groove 620 is formed on the upper portion of the support frame 610 in correspondence to the shape of the steel pipe 1 to seat the steel pipe 1 in the space and a plurality of support rollers 630 are installed along the outer circumferential surface Thereby forming a space in which the seated steel pipe 1 is rotated.

The support roller 630 is inserted into the support groove 620 so that the steel pipe 1 rubs against the outer circumferential surface of the support groove 620 directly so that the steel pipe 1 seated in the support groove 620 can be rotated without being disturbed in rotation As shown in Fig.

The fastening groove 640 is formed at a lower portion of the support frame 610, and an elastic support portion 700 is provided in the space.

The elastic supporting portions 700 are provided in the respective coupling grooves 640 and support the supporting frame 610 by elastic force.

Here, the elastic supporter 700 will be described below with reference to FIG.

FIG. 7 is a view showing the elastic support portion of FIG. 6. FIG.

7, the elastic supporting part 700 includes a supporting part 710, a plurality of vibration absorbing parts 720, a plurality of connecting plates 730, a plurality of extending plates 740, four rotating parts 750 And two support bars 760.

The support portion 710 includes a first plate 711, a second plate 712, a third plate 713, and a fourth plate 714, which are formed of an "a" shaped plate.

At this time, the first plate 711, the second plate 712, the third plate 713, and the fourth plate 714 are spaced apart from each other so as to face each other, And the vibration absorbing portion 720 is installed in each of the spaced apart spaces to absorb the vibration transmitted to each plate.

The vibration absorbing portion 720 is installed between each plate of the support portion 710 and the other plate to absorb vibration.

In one embodiment, the vibration absorbing portion 720 may be formed by means of an elastic material such as a spring or rubber that can absorb impact, but it is not limited to the name Will be possible.

The connecting plate 730 is disposed between the upper portion of the first plate 711 and the upper portion of the second plate 712, between the front end of the second plate 712 and the front end of the third plate 713, Between the lower portion of the fourth plate 714 and the lower portion of the fourth plate 714 and between the front end of the fourth plate 714 and the front end of the first plate 711. The first plate 711, The second plate 712, the third plate 713 and the fourth plate 714 are connected in a "+" form.

That is, the connecting plate 730 can form an overall appearance by interconnecting the upper, lower, or front ends of the respective plates, and at the same time, By adjusting the angle of connection, vibration or shock can be absorbed more efficiently.

That is, when the first plate 711, the second plate 712, the third plate 713 and the fourth plate 714 are fixed to each other by the connecting plate 730, a certain amount of external vibration or shock However, if a critical vibration or a critical impact is applied, the coupling plate 730 connected to each plate can not be maintained and the original function can not be performed.

Accordingly, the connection plate 730 according to the present invention is configured such that the first plate 711, the second plate 712, the third plate 713, and the fourth plate 714 are connected to each other so as to be movable to some extent , It is possible to maintain the fastening effectively to the vibration or impact more than the case described above.

The extension plate 740 includes an upper portion (i.e., an upper blade) and a front end (i.e., a front end wing) of the first plate 711, an upper portion and a front end of the second plate 712, And the lower portion of the fourth plate 714 and the upper portion or the lower portion of the fourth plate 714, respectively.

In one embodiment, the extension plate 740 can be pivoted by connecting an upper portion or a lower portion to a pivot shaft formed at one side of the pivot portion 750.

In one embodiment, the extension plate 740 includes a second upper fastening groove 7113 or a second upper fastening groove 7113 so as to be able to slide in the vertical direction in the second upper fastening groove 7113 or the second front fastening groove 7115. [ A vertical sliding groove 741 (see FIG. 8) can be formed at a lower portion connected to the front end fastening groove 7115.

The swinging unit 750 is installed on the inner side of the support bars 760 facing each other so that the upper or lower portions of the two extension plates 740 extending from the respective plates are opposed to and rotatable with respect to each other, For example, using fastening means such as screw bolts, welding or rivets.

The supporting bar 760 is provided with an upper side or a lower side of the rotary part 750. The supporting bar 760 located on the upper side supports the upper end surface of the coupling groove 640, The elastic member 760 is installed in the main body 11, 21 or 22 of the apparatus and is supported by the pivot portion 750 so as to be spaced apart in the up-and-down direction, .

The elastic support portion 700 having the above-described structure can absorb the vibration caused by the rotation of the steel pipe 1 by effectively dispersing the load transmitted from the steel pipe 1 to the steel pipe support portion 600, It is possible to effectively prevent falling downward.

FIG. 8 is a view showing the first plate of FIG. 7; FIG.

8, the first plate 711 includes a plate body 7111, two first upper engagement grooves 7112, a second upper engagement groove 7113, two first shear engagement grooves 7114, And a second shear locking groove 7115.

The plate body 7111 is formed of an "a" shaped plate, and two upper first fastening grooves 7112 and a second upper fastening groove 7113 are formed in the upper blade, The front end fastening groove 7114 and the second front end fastening groove 7115 are formed.

The first upper fastening groove 7112 is formed on the upper blade of the plate body 7111 formed in the upward direction, and the front end of the connecting plate 730 is rotatably connected.

The second upper fastening groove 7113 is formed between the first upper fastening groove 7112 and is connected to the lower portion of the extension plate 740 so as to be rotatable.

The first shear locking groove 7114 is formed on the front end of the plate body 7111 formed in the front end direction and is connected to the upper portion of the connecting plate 730 so as to be rotatable.

The second shear engagement groove 7115 is formed between the first shear engagement grooves 7114 and is connected to the lower end of the extension plate 740 so as to be rotatable.

In one embodiment, the extension plate 740 includes a second upper fastening groove 7113 or a second upper fastening groove 7113 so as to be able to slide in the vertical direction in the second upper fastening groove 7113 or the second front fastening groove 7115. [ A vertical sliding groove 741 can be formed at a lower portion connected to the front end fastening groove 7115.

The connection plate 730 may also have a sliding groove having the same structure as the sliding groove 741 of the extension plate 740 described above.

The first plate 711 having the above-described structure can be applied to the second plate 712, the third plate 713, or the fourth plate 714, Description of the second plate 712, the third plate 713 or the fourth plate 714 will be omitted.

The supporting bar 760 of FIG. 7 according to the present invention can be made of a plastic sheet having superior moldability and durability than a plastic sheet produced by using PET resin alone.

The plastic sheet according to the present invention is produced by the following method for producing a plastic sheet.

9, a method of producing a plastic sheet for producing a plastic sheet according to the present invention comprises: 100 parts by weight of a polyethylene terephthalate (PET) resin, 2 to 4 parts by weight of a polyurethane dispersant, 0.1 to 0.2 part by weight of polyethylene dioxythiophene polystyrene sulfonate, 3 to 5 parts by weight of polystyrolsulfonic acid, N-methyl-2-pyrrolidone, 0.1 to 0.3 parts by weight of triethylamine, 42 to 45 parts by weight of isopropyl alcohol and 50 to 52 parts by weight of water to prepare a mixed composition (S110); A second step (S120) of preheating the mixed composition; A third step (S130) of removing moisture from the preheated mixed composition; A fourth step (S140) of heating the moisture-removed mixed composition; A fifth step (S150) of removing foreign substances from the heated mixed composition; A sixth step (S160) of stretching the mixed composition from which the foreign substances have been removed while cooling it to produce a plastic sheet; And a seventh step (S170) of applying silicone to the plastic sheet and drying the plastic sheet.

The present invention can produce a plastic sheet having excellent moldability and durability by preheating, dehumidifying, heating and cooling by mixing various additives with conventional PET resin.

In the first step S110, as a mixing step of the raw materials, polyethylene terephthalate (PET) resin is used as a base resin, and a polyurethane dispersant, polyethylene dioxythiophene polystyrene sulfonate ), Polystyrolsulfonic acid, N-methyl-2-pyrrolidone, triethyl amine, isopropyl alcohol and water. .

The PET resin is a base resin, which has excellent thermal stability and high crystallinity, can be recycled, and is manufactured in a master batch form. The polyurethane dispersant functions to improve the compatibility with other components. Polyethylene dioxythiophene polystyrene sulfonate, polystyrolsulfonic acid, N-methyl-2-pyrrolidone, and triethyl amine. Function as an antistatic agent. Since the plastic sheet for producing the plastic container is generally an electrical insulator, static electricity is generated by friction charging, and if it is seriously damaged by discharge or electric conduction, it may lead to an accident such as explosion or fire, so it is preferable to add a charging agent . Isopropyl alcohol functions as an antifogging agent. The anti-fogging agent can inhibit the formation of water droplets due to the water vapor which may be generated when a plastic container is used to store a fruit or the like by using a plastic sheet.

In one embodiment, the above ingredients are mixed with 100 parts by weight of a polyethylene telephthalate (PET) resin, 2 to 4 parts by weight of a polyurethane dispersant, polyethylene dioxythiophene polystyrene sulfonate ), 0.4 to 0.6 parts by weight of polystyrolsulfonic acid, 3 to 5 parts by weight of N-methyl-2-pyrrolidone, 0.1 to 5 parts by weight of triethylamine amine in an amount of 0.1 to 0.3 part by weight, 42 to 45 parts by weight of isopropyl alcohol and 50 to 52 parts by weight of water. When added beyond the above-mentioned range, various problems may occur. Particularly, in the case of an antistatic agent, when mixed over the respective ranges, the plastic surface to be produced may be sticky, the sealing property and printability may be deteriorated, and in the case of white plastic, yellowing may occur.

In addition, the first step (S110) can further mix various additional components in the raw materials to enhance the functionality of the plastic sheet.

In one embodiment, the boron-based binder may be further mixed. The boron (B) type binder is used for bonding the respective components, and the boron type binder is preferably mixed in 2 to 10 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the boron-based binder is less than 2 parts by weight, the raw material or the like can not be effectively bonded, and when the content of the boron-based binder exceeds 70 parts by weight, it is uneconomical.

In one embodiment, the garlic extract may be further mixed. The garlic extract is a natural adhesive component, which together with the boron-based binder functions as a binder which improves the compatibility with other constituents. The garlic extract is peeled and crushed, and 2 to 3 parts by weight of water is added per 1 part by weight of garlic. After heating at 80 to 100 캜 for 5 hours or more, the liquid component is extracted and filtered, The liquid component can be prepared by concentrating at 55 to 60 占 폚. The garlic extract is preferably mixed in 5 to 10 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the garlic extract is less than 5 parts by weight, the raw material components may not be properly entangled so that the surface of the plastic sheet may not be uniformly formed. When the amount of the garlic extract is more than 10 parts by weight, There is a risk of degradation.

In one embodiment, the apatite powder may be further mixed. The apatite powder functions as a filler and can maintain the shape of the plastic sheet, thereby improving workability and improving strength and corrosion resistance. Apatite is an inorganic substance present in bone. It is important to use a small amount of particles, a high residual amount of carbonate, and low crystallinity for use as a filler. Preferably, the size of the apatite granules is 200 to 400 탆. For this purpose, it is important to carry out the sintering process at 500 to 700 ° C. When sintering at less than 500 ° C, there is a disadvantage in that the desired granule size and crystallinity can not be obtained. When sintering exceeds 700 ° C, there is a disadvantage in that the remaining amount of carbonate is low and the crystallinity becomes too high. The apatite powder is preferably mixed in 20 to 30 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the apatite powder is less than 20 parts by weight, there is a disadvantage in that the adhesive strength is lowered, and when it exceeds 30 parts by weight, the impact resistance is weakened.

In one embodiment, the cork powder may be further mixed. Cork powder can improve the durability of the plastic sheet with apatite powder. The cork powder can be prepared by removing the shell of oak oak and then crushing it. For the cork powder to be mixed with the PET resin and the like, it is preferable to use fine pulverized particles which have been passed through a mesh of 400 mesh or more. The cork powder is preferably mixed in 15 to 25 parts by weight with respect to 100 parts by weight of the PET resin. When the cork powder is less than 15 parts by weight, improvement in durability is insignificant. When the cork powder is more than 25 parts by weight, porosity may be formed in the production of plastics, and durability may be lowered.

In one embodiment, the Sorghum extract can be further mixed. Sorghum extract not only acts as an antimicrobial agent but also inhibits the yellowing of white plastic sheets. Rumex crispus is a genus of Rumex spp. It is a perennial herb that grows well in moist places of various places. It uses the lysoon as a food in the private sector. In the oriental medicine, it is called a yosei, and it is categorized into various diseases including cystitis, gallbladder disease, bile secretion disorder, spleen disease, It is used as an adjuvant treatment for tumors and cancer. Sorghum extract extracted from Sora japonica has antimicrobial and antioxidant effects against various microorganisms. When mixed with a small amount of sulfur, it has an excellent effect on skin itching. It has been reported that saponins, tannins, flavonoids, essential oils and chrysophanol, and anthraquinone derivatives such as emodin, are known to be useful components of the present invention. The extracts of Sorae Seedlings were washed in 80% (v / v) methanol for 3 days as an extraction solvent by washing the collected Sorghum wells and then drying them in the shade and dividing them into the ground part (except the root) and the root part (root part) After soaking, the extract is filtered with a membrane filter (pore size 0.5 mu m) to separate the solid, and the methanol extract can be prepared by concentrating the extract at 50 DEG C using a rotary evaporator. It is preferable that the Sorghum extract is mixed in 3 to 8 parts by weight with respect to 100 parts by weight of the PET resin. When the content of the extract is less than 3 parts by weight, the antimicrobial activity is insufficient in preventing yellowing, and when it is more than 8 parts by weight, it is uneconomical.

The second step (S120) is a step of preheating the mixed composition, and heat is applied to the mixed material so that the materials are stably mixed.

The third step (S130) is a dehumidifying step for removing moisture present in the preheated mixed composition, and the desiccation is preferably performed in a temperature range of 150 to 180 ° C. If the amount is less than or more than the above range, the dehumidification may not be sufficiently performed, or the durability of the plastic may be adversely affected.

The fourth step (S140) is a step of heating the mixed composition from which moisture has been removed, and the heating temperature is preferably controlled to 260 to 270 ° C in order to melt and maintain the mixed composition.

The fifth step S150 is a step of removing foreign matter from the heated mixed composition. The foreign matter may be removed from the inside of the mixed composition by passing through a screen in the form of a mesh.

The sixth step (S160) is a step of cooling the mixed composition from which foreign matters have been removed to prepare a plastic sheet, which is then stretched in two stages using a cooling roll. The primary stretching takes place in the longitudinal direction through a chill roll maintained at 16-17 캜 and the secondary stretching takes place in the width direction (vertical direction in the longitudinal direction) through a cooling roll maintained at 20-23 캜. The reason for raising the temperature of the secondary elongation to be higher than the primary elongation temperature is to prevent the plasticizability of the solidified plastic sheet from being dried and to improve the durability and moldability of the plastic sheet by alternately stretching the longitudinal direction and the width direction .

The seventh step (S170) is a step of applying silicone to the plastic sheet and then drying it, so that the antistatic effect can be obtained while the silicone is applied and finished. It is preferable that silicone is applied using a diluted coating liquid in a concentration range of 5 to 25%, coated with silicone, and then dried at 160 to 215 캜. Further, it is preferable that the anti-fogging agent component is mixed with the silicone-containing coating liquid in order to suppress the water phenomenon formed in the produced plastic container.

Hereinafter, the structure and effects of the present invention will be described in more detail with reference to specific examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.

[Examples and Comparative Examples]

After preparing a mixed composition according to the composition shown in the following Table 1, plastic sheets were prepared by preheating, dehumidifying, heating, removing foreign matter, cooling, stretching and drying to prepare Examples and Comparative Examples. For each material, commercially available materials were used, and garlic extract and Sorghum extract were prepared as described in the detailed description of the invention.

[Table 1]

[Experimental Example 1]

The compositions of Examples 1 to 3 and Comparative Examples were secondarily drawn to prepare a plastic sheet having a thickness of 10 mm, and the uniformity of the sheet surface was measured and reported in Table 2 below. At this time, the primary drawing was performed at 16 占 폚 and the secondary drawing was performed at 21 占 폚. The uniformity was measured using a laser sensor (N2 laser, oscillation wavelength 337.1 nm, UDHO Laser., Japan), and 30 points were randomly selected and their surface roughness was measured , A value equal to or less than 0.3 was considered to be uniform, and a value exceeding 0.3 was evaluated to be non-uniform. Here, Examples 1 to 3 were stretched in the transverse direction after stretching in the longitudinal direction, and stretched only in the longitudinal direction in the Comparative Example.

[Table 2]

As shown in Table 2, in Examples 1 to 3, uniformity was more excellent than Comparative Example.

[Experimental Example 2: Torsion Test]

The compositions of Examples 1 to 3 and Comparative Examples were secondarily stretched to prepare a plastic sheet having a thickness of 2 mm and then molded to produce 100 plastic products, and the completeness of the plastic sheets was evaluated. Here, Examples 1 to 3 were stretched in the transverse direction after stretching in the longitudinal direction, and stretched only in the longitudinal direction in the Comparative Example.

[Table 3]

As shown in Table 3, in the case of Examples 1 to 3, 90% or more of the normal product could be made, but the comparative example had a relatively high defect rate.

[Experimental Example 3: yellowing test]

The compositions of Examples 1 and 3 were secondarily stretched to prepare a plastic sheet having a thickness of 2 mm and then molded to prepare 100 white plastic products. Ten months later, discoloration was visually observed, . At this time, a part changed to yellow color was evaluated as poor.

[Table 4]

As shown in Table 4, in Example 3, it was confirmed that almost all the products were not discolored. On the other hand, Example 1 showed good results, but had a higher discoloration rate than Example 3.

[Experimental Example 4: Anti-Fogging Test]

The composition of Comparative Example and Example 3 was secondarily drawn to prepare a plastic sheet having a thickness of 2 mm and then molded to produce 100 white plastic products. The spinach was stored inside, and after one day, The results are shown in Table 5 below.

[Table 5]

As shown in Table 5, in the case of Example 3, almost no water droplets were formed, but in the comparative example, it was confirmed that water droplets enough to be visually recognized were formed.

The support bar 760 made of the plastic sheet of the above-described material can be more excellent in moldability and durability than that produced by using PET resin alone.

Accordingly, when the support bar 760 is worn or damaged due to continuous vibration, the plastic sheet can easily be re-manufactured and replaced to ensure continuous use of the apparatus.

Fig. 10 is a view showing another example of the steel tube supporting portion of Fig. 4 or Fig. 5;

10, the steel pipe supporting part 600 includes a supporting frame 610, a supporting groove 620, a plurality of supporting rollers 630, a plurality of engaging grooves 640, and a load dispersing part 800 . Here, the structure of the support frame 610, the support grooves 620, the plurality of support rollers 630, and the plurality of engagement grooves 640 are the same as those of FIG.

The support frame 610 according to the present embodiment is not fixedly installed on the upper part of the body 11, 21 or 22 of the apparatus but may be fixed to the body 11, 21 or 22 In the upward direction.

The load distribution unit 800 is installed in each of the engagement grooves 640 to support the support frame 610. Here, the load distribution unit 800 will be described later with reference to FIG.

11 is a view showing the load distribution unit of FIG.

11, the load dispersing unit 800 is installed on the lower side of the support portion 830 that supports the support frame 610 and has an upper end fixed to the upper surface of the coupling groove 640, A plurality of supporting small balls 820 placed on the hollow portion 815 and an upper portion extending from the center of the ground plane 845 and the ground plane 845 in the upward direction And a grounding ball 840 having a fixing bolt 846 to be fixed.

The load dispersing unit 800 disperses and partially absorbs the load externally applied, and can transmit a load q smaller than the load P externally applied.

The load dispersing unit 800 disperses the load externally applied to the ball housing 810 inside the ball housing 810 and ultimately transmits a load smaller than the load externally applied to the ball housing 810 . A load externally applied to the ball housing 810 is dispersed by a plurality of small balls 820 for support and a ground ball 840 located in the hollow portion 815. A part of the load is applied to the ball housing 810 So that the remaining load can be transmitted to the outside of the ball housing 810. [

The ball housing 810 may be fixed to the surface using concrete or the like and may have a hollow portion 815 in which a plurality of small balls 820 for support and a ground ball 840 are accommodated .

The ball housing 810 is made of a material having a certain strength such as iron, concrete, wood, plastic or the like in order to support a load dispersed by a plurality of small balls 820 for support and a ground ball 840 ≪ / RTI >

The shape of the ball housing 810 may be various shapes such as a polygonal shape and a spherical shape. However, the hollow portion 815 may be formed in a spherical shape corresponding to the shape of the ground ball 840.

The plurality of small balls for support 820 and the ground ball 840 may be accommodated in the hollow portion 815 and may be formed in a spherical shape.

The plurality of small balls for support 820 can be regularly arranged and received so as to be in contact with each other along the outer circumferential surface of the hollow portion 815. The ground ball 840 may be received in the hollow portion 815 in a state of being put on a plurality of small balls for support 820 and may be supported in a point contact state with a plurality of small balls 820 for support.

The plurality of support small balls 820 and the ground balls 840 are regularly arranged so that the outer circumferences thereof are in contact with each other. The contact points between the plurality of small balls for support 820 and the ground balls 840, The external load may be dispersed while pressing the hollow portion 815, i.e., the inner wall of the ball housing 810, finally disposed at the outermost position. At this time, in this embodiment, the plurality of small balls for support 820 are regularly arranged and the ground balls 840 are arranged on the plurality of small balls for support 820, It is possible to increase the number of contact points between the ball 820 and the ground ball 840 and to regularize the load transfer so as to enhance the load transfer effect between the balls. In addition, the ground ball 840 is supported in a point contact state by a plurality of small balls 820 for support, so that wear can be minimized.

The plurality of small balls for support 820 and the ground ball 840 may be made of a material having a strength capable of withstanding a load due to a contact point between them and may be made of iron, have.

Meanwhile, the ground ball 840 may have a ground plane 845 at an upper portion thereof. A fixing bolt 846 is installed at the center of the ground plane 845 and inserted into the lower portion of the support portion 830 to fix the support portion 830 to the ground ball 840.

At this time, the fixing bolt 846 may be formed in a non-uniform pattern without forming a separate protrusion on the outer side, but may be formed on the lower side of the supporting portion 830 by forming a thread along the outer side surface It is preferable to tighten the bolts more strongly.

Thus, the load distribution portion 800 supports the steel pipe 1 that is normally rotated by being supported by the support frame 610 provided below the support frame 610. When the steel pipe 1 is dropped, The load transmitted from the steel pipe 1 is dispersed and supported, so that the support stability can be assured.

It will be apparent to those skilled in the art that the above-described embodiments are for illustrative purposes only and that those skilled in the art will readily understand that various changes and modifications can be made without departing from the spirit and scope of the present invention. You will understand. It is therefore to be understood that the above-described embodiments are to be considered in all respects only as illustrative and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

It is to be understood that the scope of the present invention is defined by the appended claims rather than the foregoing description and should be construed as including all changes and modifications that come within the meaning and range of equivalency of the claims, .

1: Steel pipe 10, 20, 30: Steel pipe rotating device
100, 300: rotating roller 110: first rotating roller
120: second rotating roller 200, 500: rotation driving part
310: first driving rotating roller 320: second driving rotating roller
330: first manual rotating roller 340; The second manual-
600: Steel pipe supporting part 610: Support frame
620: Support groove 630: Support roller
640: fastening groove 700: elastic support
710: Support part 720: Vibration absorption part
730: connecting plate (730) 740: extension plate
750: turning part 760: supporting bar
800: load distributor 810: ball housing
820: Small ball for support 830: Support
840: ground ball

Claims (2)

A rotating roller including a first rotating roller and a second rotating roller that support a lower front end or a rear end of a steel pipe and rotate; And
And a rotation driving unit connected directly to the first rotation roller to rotate the first rotation roller,
Further comprising a steel pipe supporting portion provided on a lower side of a steel pipe supported by the rotating roller and supporting a rotating steel pipe,
Wherein the steel pipe supporting portion includes a support frame installed in a space between the rotating rollers and supporting one side or another side of the steel pipe; A support groove formed in the upper portion of the support frame corresponding to the shape of the steel pipe; A plurality of support rollers installed along the outer circumferential surface of the support groove so that the steel pipe seated in the support groove can be rotated; A plurality of coupling grooves formed at a lower portion of the support frame; And an elastic support portion provided in the coupling groove and supporting the support frame by an elastic force,
Wherein the elastic support comprises: a support comprising a first plate, a second plate, a third plate and a fourth plate, the support being formed of an "a" A vibration absorbing part provided between the plate of the support part and the other plate to absorb vibration; Between the upper portion of the first plate and the upper portion of the second plate, between the front end of the second plate and the front end of the third plate, between the lower portion of the third plate and the lower portion of the fourth plate, A second plate, a third plate, and a fourth plate that are installed between the front end of the first plate and the front end of the first plate to connect the first plate, the second plate, the third plate, and the fourth plate; The upper and the front ends of the first plate, the upper and the front ends of the second plate, the front and lower ends of the third plate, and the upper and lower ends of the fourth plate, An extension plate; Four swiveling parts connected to each other such that upper or lower portions of two extension plates extending from each plate are opposed and rotatable; And two support bars provided on the upper or lower side of the rotary part and supported by the rotary part to be spaced apart from each other in an upward and downward direction to form an interspace,
Wherein the first plate comprises: a plate body formed from an "a" Two first upper fastening grooves formed on an upper blade of the plate body formed in an upper direction and connected to each other so that a front end of the connecting plate is rotatable; A second upper fastening groove formed between the first upper fastening grooves and connecting the lower portion of the extension plate so as to be rotatable; Two first shear locking grooves formed on front end blades of the plate body formed in a shear direction and connected to each other so that the upper portion of the connecting plate is rotatable; And a second shearing engagement groove formed between the first shearing engagement grooves and connecting the lower portion of the extension plate so as to be rotatable,
The extension plate may be formed in a lower portion connected to the second upper engagement groove or the second shear engagement groove so as to be able to slide in the vertical direction in the second upper engagement groove or the second shear engagement groove, Thereby forming a sliding groove.

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