KR102300682B1 - Lashing bar having composite materials, and manufacturing method for the same - Google Patents

Abstract

A lashing bar according to the present invention winds only a barrel member at both ends with continuous fiber (tow prepreg) to reinforce the same, and not winds a rod so that productivity can be increased, production cost can be lowered, and product weight can be reduced. At the same time, product performance standards can be satisfied. In addition, instead of wet filament winding, since the tow prepreg is used, it is possible to precisely match an impregnation volume ratio of resin and reinforcing fiber. Thus, the product quality can be improved, resins with excellent physical properties, such as mechanical properties, heat resistance, and chemical resistance, can be used, and slipping can be prevented due to excellent adhesion to the barrel member. The lashing bar comprises: a rod (10) formed to extend long in the longitudinal direction; barrel members (20) fastened to both ends of the rod (10); and continuous fibers (50) impregnated with resin and installed to wind the barrel member (20), wherein the barrel member (20) is reinforced by winding the barrel member (20) by the continuous fiber (50), and the rod (10) is not wound by continuous fibers or only the end thereof is wound. The barrel member (20) includes an inserting part (21) and a fastening part (26), wherein the inserting part (21) has a through hole (22) into which the rod (10) is inserted, and the fastening part (26) has a ring. A protrusion (21a) is formed at the rear end of the inserting part (21) due to the difference in diameter between the rear end of the inserting part (21) and the rod (10). The winding includes a primary winding and a secondary winding, wherein the primary winding winds the inserting part (21) and the fastening part (26) in the longitudinal direction of the rod (10), while covering the protrusion (21a) of the rear end of the inserting part (21) and the outer surface of the ring of the fastening part (26), and the secondary winding winds the inserting part (21) in a spiral shape in a direction perpendicular to the longitudinal direction.

Description

Lashing bar comprising a composite material, and a manufacturing method thereof {Lashing bar having composite materials, and manufacturing method for the same}

The present invention relates to a lashing bar including a composite material. More specifically, only the barrel members at both ends are wound and reinforced with continuous fibers (tow prepreg), and the bar is made by drawing CFRP without winding continuous fibers (tow prepreg). It is about a lashing bar that can increase productivity, lower production cost, reduce product weight, and at the same time satisfy product performance standards.

In addition, the present invention also includes a method for manufacturing such a lashing bar.

In general, a lashing bar (lashing bar) is used to prevent a container inclination or collapse accident when transporting a container using a ship, and is installed to connect a corner fitting and a turnbuckle of the container.

Such a lashing bar is made of steel (steel). However, the steel lashing bar weighs 20 to 25 kg with a length of 5 m and a product with a length of 2.5 to 3 m weighs 10 to 15 kg. There was a problem in that the risk increased and work efficiency was lowered.

In order to solve this problem, a method of manufacturing the rod of the lashing bar by using a wet filament winding method, and then connecting both ends of the rod and the securing buckle, has been proposed. However, this manufacturing method has a problem in that, in addition to the rod manufacturing process, a process for connecting the rod and the securing buckle is additionally required. In addition, this manufacturing method has a problem that the length of the rod cannot be freely adjusted.

In order to solve this problem, a manufacturing method of assembling a buckle at both ends of a mold (mandrel, rod) and then winding with continuous fibers to surround the buckle and the mold (rod) has been proposed. This manufacturing method is disclosed in Korean Patent Registration No. 1669582.

However, this manufacturing method requires winding by winding the buckle installed at both ends of the mold (mandrel, rod) and the mold, so the winding length becomes longer, and accordingly, the width of the winding equipment increases and one winding in the long long shaft integral winding process. It is difficult to obtain the effect of reducing the actual manufacturing process time because the time taken for the manufacturing process increases. In addition, this manufacturing method also has a problem in that it is difficult to adjust the length of the lashing bar because the length of the mold is not freely adjusted.

In addition, the manufacturing method uses wet filament winding, which impregnates the resin immediately before winding the continuous fiber into the mold, and thus it is difficult to precisely control the mixing ratio of the resin and the continuous fiber. It is difficult, the types of resin that can be used are limited, and there is a problem that slip may occur due to insufficient adhesion between continuous fibers and molds or buckles.

The present invention has been proposed to solve the above problems, and only the barrel member 20 at both ends is reinforced by winding with continuous fibers (tow prepreg, 50), and the rod 10 is made by drawing CFRP, but continuous fibers (tow prepregs). By not winding the prepreg, 50), it is an object to provide a lashing bar that can increase productivity, lower production cost, reduce product weight, and at the same time satisfy product performance standards.

Another object of the present invention is to precisely match the impregnation volume ratio of the resin and the reinforcing fiber by using a tow prepreg, which is a type of dry filament winding, instead of the conventional wet filament winding. An object of the present invention is to provide a lashing bar capable of improving quality, using a resin having excellent physical properties such as mechanical properties, heat resistance, and chemical resistance, and having excellent adhesion with the barrel member 20 to prevent slip.

Another object of the present invention is to provide a lashing bar that is easy to adjust the cross section and length of the rod 10 by drawing the CFRP to make the rod 10 .

Another object of the present invention is to provide a method for manufacturing such a lashing bar.

In order to achieve the above object, the rashing bar 100 according to a preferred embodiment of the present invention includes a rod 10 formed to extend long in the longitudinal direction; Barrel members 20 fastened to both ends of the rod 10; and a continuous fiber 50 impregnated with resin and installed to wind the barrel member 20 . The connection portion between the barrel member 20 and the rod 10 may be reinforced by the continuous fiber 50 . The rod 10 may not be wound by continuous fibers or may be wound only at its end.

Preferably, the rod 10 may be manufactured by drawing carbon fiber reinforced plastics (CFRP).

The continuous fiber 50 is a tow prepreg, and the tow prepreg is manufactured by preliminarily impregnating a resin and a reinforcing fiber in a predetermined volume ratio.

Preferably, the barrel member 20 may include an insertion part 21 and a fastening part 26 . The winding may include a primary winding and a secondary winding.

The primary winding winds the insertion part 21 and the fastening part 26 in the longitudinal direction of the rod 10, and the secondary winding winds the insertion part 21 in a spiral shape in a direction perpendicular to the longitudinal direction.

A through hole 22 is formed inside the insert 21 , a first groove 23 is formed on the outer surface of the insert 21 , and a wedge 30 is installed in the through hole 22 . can

The inner surface of the through hole 22 and the outer surface of the wedge 30 gradually decrease in diameter toward the rear end of the insertion portion 21 , and after the end of the rod 10 is inserted into the through hole 22 , the wedge It is fixed by (30).

And, the fastening part 26 is extended from the insertion part 21 and is formed in a ring shape, a second groove 27 is continuously formed on the outer surface of the ring, and both ends of the second groove 27 are It is connected to the first groove (23).

The tow prepreg is wound around the rear ends of the first and second grooves 23 and 27 and the inserting part 21 by the primary winding, and the secondary winding is the inserting part 21 so as to surround the primary wound tow prepreg. can be wound on the outer surface of

Another aspect of the present invention, a method for manufacturing a lashing bar, comprises the steps of: (a) preparing a barrel member 20 and a rod 10 and a continuous fiber 50; (b) fastening the barrel member 20 and the rod 10; and, (c) reinforcing the barrel member 20 by winding the continuous fibers 50 around the barrel member 20 . The rod 10 may not be wound or only a short section of the end of the rod 10 may be wound.

The present invention has the following effects.

First, only the barrel member (buckle) at both ends is reinforced by winding with continuous fiber (tow prepreg), and the bar is made by drawing CFRP but not winding continuous fiber (tow prepreg) to increase productivity, lower production cost, and reduce product weight can be reduced, and at the same time, product performance standards can be satisfied.

Second, by using tow prepreg, a type of dry filament winding, instead of the existing wet filament winding, the impregnation volume ratio of the resin and the reinforcing fiber can be precisely matched and the product quality can be improved. A resin having excellent physical properties, such as mechanical properties, heat resistance, and chemical resistance, can be used and has excellent adhesion to the barrel member to prevent slip.

1 is a perspective view showing that the rashing bar is connected to the turnbuckle according to a preferred embodiment of the present invention.
Figure 2 is an exploded perspective view showing the lashing bar of Figure 1;
3A is an enlarged view of part A of FIG. 1;
FIG. 3B is an enlarged view of part B of FIG. 1 ;
Figure 4a is a perspective view showing the barrel member of the lashing bar.
Figure 4b is a cross-sectional view showing that the primary and secondary winding is made on the barrel member.
Figure 5a is a view showing the primary winding of the barrel member.
Figure 5b is a view showing the secondary winding after the primary winding of the barrel member.
Figure 6 is a flow chart showing the manufacturing process of the lashing bar.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention. Accordingly, since the embodiments described in the present specification and the configurations shown in the drawings are merely embodiments of the present invention and do not represent all the technical spirit of the present invention, various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and examples.

1 is a perspective view showing that a lashing bar is connected to a turnbuckle according to a preferred embodiment of the present invention, and FIG. 2 is an exploded perspective view showing the lashing bar. And, FIG. 3A is an enlarged view of part A of FIG. 1 , and FIG. 3B is an enlarged view of part B of FIG. 1 . In FIG. 2, continuous fibers are excluded to show the structure of the barrel member.

As shown in the drawing, the lashing bar 100 includes a rod 10 , a barrel member 20 , and a continuous fiber 50 .

The barrel member 20 is installed at both ends of the rod 10, and the barrel member 20 at both ends may have the same structure or a different structure. Preferably, the container hook 1 is installed at one end of the barrel member 20 and the turnbuckle 200 is connected to the other end. The container hook 1 may be fastened to the barrel member 20 by bolts and nuts. A bearing 2 may be interposed between the container hook 1 and the barrel member 20 .

The barrel member 20 may be made of a metal such as steel (steel). In addition, the barrel member 20 may include an insertion part 21 and a fastening part 26 .

A through hole 22 may be formed in the longitudinal direction of the rod 10 in the insertion portion 21 , and a wedge 30 may be installed in the through hole 22 .

The inner surface of the through hole 22 and the outer surface of the wedge 30 are inclined so that their diameters gradually decrease toward the rear end of the insertion part 26 . Accordingly, when a tensile force acts on the rod 10 and a force to pull the wedge 30 rearward acts, the wedge 30 is in close contact with the inner surface of the through hole 22 and the inner diameter thereof is reduced, so that the rod 10 is pressed. to be fixed

A first groove 23 is formed on the outer surface of the insertion part 21 in the longitudinal direction of the rod 10 . A total of two first grooves 23 may be formed at intervals of 180°.

The fastening part 26 extends from the insertion part 21 and is integrally formed. Specifically, the fastening portion 26 extends from the insertion portion 21 to form a ring shape, and a second groove 27 is continuously formed on the outer surface of the ring. And, both ends of the second groove 27 are respectively connected to the first groove 23, and accordingly, the first and second grooves 23 and 27 are continuously extended. The first and second grooves 23 and 27 are portions on which the continuous fibers 50 to be primarily wound are seated.

The continuous fiber 50 reinforces the load bearing capacity of the barrel member 20 by first and second winding the barrel member 20 . In FIG. 4B , the green line and arrow indicate the primary winding and the red line and arrow indicate the secondary winding.

Due to the difference in diameter between the rear end of the insertion unit 21 and the rod 10 , a jaw (21a in FIGS. 5A to 5B ) is formed at the rear end of the insertion unit 21 . The primary winding is made to surround the first and second grooves 23 and 27 and the chin 21a of the rear end of the barrel member 20 as shown in FIGS. 4B and 5A, preferably the barrel member At the rear end of (20), the continuous fiber 50 is wound so as to alternately pass through the left and right sides of the rod 10 each time or alternately pass through every predetermined number of times. For example, if the continuous fiber 50 wound with the first and second grooves 23 and 27 passed through the left side of the rod 10 at the rear end of the barrel member 20, the rod 10 during the next winding. It can be wound via the right side of

In the secondary winding, as shown in FIG. 5 , the outer surface of the insertion part 21 and the primary wound continuous fiber 50 are wound in a spiral shape in a direction perpendicular to the longitudinal direction of the rod 10 . The continuous fiber used for the secondary winding is preferably wider than the continuous fiber used for the primary winding. On the other hand, the secondary winding may wind only the insertion part 21 and not the end of the rod 10 as shown in FIG. 5b, but a short section of the tip of the rod 10 together with the insertion part 21, for example, 10 cm It is also possible to wind a section within or within 5 cm.

As described above, in the present invention, since only the barrel member 20 is wound or only a short section between the ends of the barrel member 20 and the rod 10 is wound, the time taken for winding can be greatly reduced, and the winding machine can be made small and produced. unit price can be lowered.

The continuous fiber 50 is used for filament winding as a reinforcing fiber impregnated with a resin. Specifically, glass fiber, carbon fiber, aramid fiber, etc. may be used as the reinforcing fiber, and epoxy, etc. may be used as the resin.

On the other hand, the filament winding disclosed in Patent Registration No. 1669582 is wet filament winding. Since the wet filament winding is impregnated with the resin immediately before the reinforcing fiber is wound on the mold (mandrel), the resin impregnation may not be uniformly made at a certain rate. There is a problem that the kind of resin that can be used is limited. In addition, in wet filament winding, since the adhesive force of the continuous fibers is small, there is a problem in that there is a high possibility of slipping with respect to the mold (mandrel, that is, the barrel member).

In order to solve this problem, in the present invention, instead of wet filament winding, dry filament winding using a tow prepreg may be performed. Tow prepreg is a continuous fiber pre-impregnated with resin and reinforcing fiber in a constant volume ratio, and has the advantage of being able to precisely control the impregnation ratio of resin and reinforcing fiber, and having many types of available resin and excellent physical properties. In addition, in dry filament winding, since there is tack of continuous fibers, it is advantageous because the possibility of slipping with respect to the mold (mandrel, that is, the barrel member) is small. However, the present invention does not completely exclude wet filament winding from the scope of the right, and as described in claim 1, when winding only the barrel member or winding only a short section between the barrel member and the end of the rod, winding with wet filament winding is also the right included in the scope.

On the other hand, the rod 10 may be manufactured by pultrusion of CFRP (carbon fiber reinforced plastics). As is known, CFRP has the advantages of greater tensile strength and corrosion resistance than steel and light weight. Therefore, the lashing bar 100 using this has greater tensile strength and corrosion resistance than the conventional steel lashing bar and has a lighter weight.

And, as is known, pultrusion is a process of impregnating a reinforcing fiber (eg, carbon fiber) in a resin, allowing it to pass through a heated die, curing it, and then cutting it at predetermined intervals. The shape of the through hole of the die The cross-sectional shape of the rod can be adjusted accordingly, and the length of the rod can be adjusted by adjusting the cutting interval, so it is advantageous to produce lashing bars of various cross-sections and lengths.

Then, the manufacturing process of the lashing bar will be described below with reference to FIG. 6 .

First, the rod 10, the barrel member 20, and the continuous fiber 50 are prepared (S10). The rod 10 is preferably manufactured by drawing CFRP and the continuous fiber 50 is preferably a tow prepreg.

Next, the barrel member 20 is coupled to both ends of the rod 10 (S20). Specifically, the end of the rod 10 is inserted into the wedge 30 , and the end and the wedge 30 of the combined rod 10 are inserted into the through hole 22 . The wedge 30 serves to fix the end of the rod 10 to the barrel member 20 .

Next, primary winding is performed so that the continuous fiber 50 surrounds the first and second grooves 23 and 26 and the rear end of the barrel member 20 (S30). The primary winding is made in the longitudinal direction of the rod 10 , and when winding the rear end of the barrel member 20 , it is preferable to alternately wind the left and right sides of the rod 10 .

After the primary winding is completed, the outer surface of the insertion part 21 and the primary wound continuous fiber 50 are secondary-wound (S40). The secondary winding is made in a direction perpendicular to the longitudinal direction of the rod 10, and is wound to form a spiral shape. The continuous fiber 50 used for the secondary winding may be of the same type as the continuous fiber 50 used for the primary winding, but it is preferable that the width is larger than the continuous fiber 50 used for the primary winding. . On the other hand, it is preferable that the primary and secondary windings are made for both the barrel members 20 on both sides of the rod.

After the secondary winding is completed, the lashing bar 100 is heat-hardened (S50). Heat curing may be performed by a rotary curing oven or the like. After the heat curing is completed, the sharp part present on the surface of the lashing bar 100 is removed (demolding/finishing process, S60).

Next, by testing the tensile and torsional strength with respect to the lashing bar 100, it is determined whether or not the pass (S70).

On the other hand, although it has been described above that the rashing bar is used for supporting the container, the rashing bar according to the present invention may be used for the purpose of repairing and reinforcing structures such as buildings. Korean Patent Registration No. 1,119,659, etc. discloses the reinforcement of a building structure using a reinforcement material such as a PC stranded wire, and a lashing bar according to the present invention may be used as a reinforcement in place of the PC stranded wire. At this time, the barrel member may be fastened to a fastening rod (anchor, etc.) fixed to the building.

1: container hook 2: bearing
10: rod 20: barrel member
21: insertion part 22: through hole
23: first groove 26: fastening part
27: second groove 30: wedge
50: continuous fiber 100: lashing bar
200: turnbuckle

Claims (10)

a rod 10 formed to extend long in the longitudinal direction;
Barrel members 20 fastened to both ends of the rod 10; and,
Continuous fibers 50 impregnated with resin and installed to wind the barrel member 20;
The barrel member 20 is reinforced by winding the barrel member 20 by the continuous fiber 50,
The rod 10 is not wound by continuous fibers or only the end is wound,
The barrel member 20 includes an inserting part 21 and a fastening part 26, the inserting part 21 having a through hole 22 into which the rod 10 is inserted, and the fastening part 26 having a ring. and, due to the difference in diameter between the rear end of the insertion unit 21 and the rod 10, a jaw 21a is formed at the rear end of the insertion unit 21,
The winding includes a primary winding and a secondary winding,
The primary winding winds the insertion part 21 and the fastening part 26 in the longitudinal direction of the rod 10, and the chin 21a of the rear end of the insertion part 21 and the outer surface of the ring of the fastening part 26 wrap the
The secondary winding is characterized in that the insertion portion 21 is wound in a spiral shape in a direction perpendicular to the longitudinal direction, a lashing bar comprising a composite material. According to claim 1,
The rod 10 is characterized in that manufactured by drawing CFRP (carbon fiber reinforced plastics), a lashing bar comprising a composite material. 3. The method of claim 1 or 2,
The continuous fiber 50 is a tow prepreg, and the tow prepreg is a lashing bar comprising a composite material, characterized in that it is prepared by impregnating a resin and a reinforcing fiber in a predetermined volume ratio in advance. delete a rod 10 formed to extend long in the longitudinal direction;
Barrel members 20 fastened to both ends of the rod 10; and,
Continuous fibers 50 impregnated with resin and installed to wind the barrel member 20;
The barrel member 20 is reinforced by winding the barrel member 20 by the continuous fiber 50,
The rod 10 is not wound by continuous fibers or only the end is wound,
The continuous fiber 50 is a tow prepreg, and the tow prepreg is manufactured by impregnating a resin and a reinforcing fiber in a predetermined volume ratio in advance,
The barrel member 20 includes an insertion part 21 and a fastening part 26,
The winding includes a primary winding and a secondary winding,
The primary winding winds the insertion part 21 and the fastening part 26 in the longitudinal direction of the rod 10, and the secondary winding winds the insertion part 21 in a spiral shape in a direction perpendicular to the longitudinal direction,
A through hole 22 is formed inside the insertion portion 21, a first groove 23 is formed on an outer surface of the insertion portion 21, and a wedge 30 is installed in the through hole 22, ,
The inner surface of the through hole 22 and the outer surface of the wedge 30 decrease in diameter toward the rear end of the insertion part 21, and after the end of the rod 10 is inserted into the through hole 22, the wedge ( 30) is fixed by
The fastening part 26 extends from the insertion part 21 and is formed in a ring shape, a second groove 27 is continuously formed on the outer surface of the ring, and both ends of the second groove 27 are first It is connected with the groove (23),
The tow prepreg is wound around the rear ends of the first and second grooves 23 and 27 and the inserting part 21 by the primary winding, and the secondary winding is the inserting part 21 so as to surround the primary wound tow prepreg. Rashing bar comprising a composite, characterized in that for winding the outer surface of the. (a) preparing a barrel member 20, a rod 10, and a continuous fiber 50;
(b) fastening the barrel member 20 and the rod 10; and,
(c) reinforcing the barrel member 20 by winding the continuous fiber 50 on the barrel member 20;
The rod 10 is not wound or only the end of the rod 10 is wound,
The barrel member 20 includes an inserting part 21 and a fastening part 26, the inserting part 21 having a through hole 22 into which the rod 10 is inserted, and the fastening part 26 having a ring. and, due to the difference in diameter between the rear end of the insertion unit 21 and the rod 10, a jaw 21a is formed at the rear end of the insertion unit 21,
The step (c) is,
(c1) primary winding of the barrel member 20 in the longitudinal direction of the rod 10 using the continuous fiber 50; and,
(c2) after the step (c1), using the continuous fiber 50 to secondary winding the insertion part 21 in a direction perpendicular to the longitudinal direction;
The primary winding winds the insertion part 21 and the fastening part 26 in the longitudinal direction of the rod 10, and the chin 21a of the rear end of the insertion part 21 and the outer surface of the ring of the fastening part 26 wrap the
The secondary winding is a method of manufacturing a lashing bar, characterized in that the insertion part 21 is wound in a spiral shape in a direction perpendicular to the longitudinal direction. 7. The method of claim 6,
The step (a) is a method of manufacturing a rashing bar, characterized in that for manufacturing the rod (10) by drawing CFRP (carbon fiber reinforced plastics). 8. The method of claim 7,
The continuous fiber 50 is a tow prepreg, and the tow prepreg is a method of manufacturing a lashing bar, characterized in that it is prepared by impregnating a resin and a reinforcing fiber in a predetermined volume ratio in advance. delete 7. The method of claim 6,
On the outer surface of the barrel member 20, first and second grooves 23 and 27 are formed so as to be continuous in the longitudinal direction of the rod 10,
The primary winding is made to surround the rear end of the first and second grooves 23 and 27 and the barrel member 20, and alternately passes through the left and right sides of the rod 10 at the rear end each time or alternates every predetermined number of times. A method of manufacturing a lashing bar, characterized in that winding the rear end of the barrel member 20 so as to pass through the furnace.

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