KR20100138686A - Appartus for making round sling - Google Patents

Abstract

PURPOSE: An apparatus for making a round sling is provided to apply a pre-tensile force to yarn, thereby preventing drooping of partial yarn while winding the yarn. CONSTITUTION: A pre-tensile device(200) twists yarn of strands. The pre-tensile device applies a pre-tensile force to each yarn. A winding device(300) winds yarn to which the pre-tensile force is applied. The winding device manufactures a round sling. The pre-tensile device includes a device frame(210) and a yarn twisting unit(220). The yarn twisting unit is installed on the device frame. The yarn twisting unit twists yarn of strands.

Description

Round sling manufacturing equipment {APPARTUS FOR MAKING ROUND SLING}

The present invention relates to a round sling manufacturing apparatus.

When lifting a heavy object using a crane or the like, a wire rope, a belt sling or a round sling is used to connect the heavy object to a crane.

Among them, the wire rope is composed of a plurality of steel wires. Therefore, there is an advantage that can be used when lifting a heavy weight. However, since it is composed of a plurality of steel wires, its own weight is high and it is not flexible, so it is not easy to carry, handle or install.

In addition, the belt sling is made by weaving a plurality of threads. Therefore, it is lighter and more flexible than wire rope, so it is easy to carry, handle or install than wire rope. However, there is a drawback that it can not be used when lifting a heavy weight, but can be used only when lifting a heavy weight.

In addition, the round sling is made by disposing a high strength seal inside the sheath, and can be used to lift a heavy weight such as a wire rope, and it is light and flexible like a belt sling, so it is easy to carry, handle or install. .

On the other hand, when making such a wind sling, a plurality of high-strength yarns are wound in a ring shape, for example, so that a plurality of high-strength threads are arranged inside the sheath. There is a problem that sag while cold. In addition, if the tensile force of the wound yarn is not evenly distributed, since the force is concentrated on the small portion of the tensile force, there is a problem that a part of the yarn forming the wind sling may be broken. Accordingly, there is a problem that the durability of the wind sling does not last long. In addition, since there is a limit to the number of times that the high-strength thread is wound inside the sheath of the wind sling, there is a problem in that the magnitude of the tensile force of the wind sling manufactured is limited.

The present invention is made by recognizing at least one of the needs or problems occurring in the conventional round sling manufacturing apparatus as described above.

One object of the present invention is to apply a pre-tensioning force to the yarn for manufacturing the round sling to prevent part of the yarn sag when winding the yarn for the manufacture of the round sling.

Another object of the present invention is to adjust the tensile force of the winding wound while the pre-tensioning yarn is applied for the manufacture of the round sling.

Yet another object of the present invention is to make the tension of the yarn forming the round sling even.

Another object of the present invention is to evenly maintain the durability of the round sling evenly by the tensile force of the yarn forming the round sling.

Another object of the present invention is to be able to manufacture a round sling to have all the required tensile force, without limiting the magnitude of the tensile force of the round sling to be produced.

An apparatus for manufacturing a round sling according to an embodiment for realizing at least one of the above problems may include the following features.

The present invention is basically based on the pre-tensioning force applied to the yarn for manufacturing the round sling and for controlling the tensile force of the winding yarn for the manufacture of the round sling.

An apparatus for manufacturing a round sling according to an embodiment of the present invention comprises: a pretensioning device configured to apply pretensioning force to each thread by twisting a plurality of strands; And a winding device configured to wind the threads of several strands to which the pretensioning force is applied by the pretensioning device so as to coat the threads so as to produce a round sling. As shown in FIG.

The pre-tensioning device comprises a device frame; And a thread twist part rotatably installed on the device frame and configured to twist threads of several strands. It may include.

In addition, the thread twist portion is a rotating member which is connected to the first rotary drive means provided in the device frame to rotate; A thread unwinding means provided with a plurality of circumferences of the rotating member so that the thread wound around the thread is released while the thread is inserted and rotated; A plurality of first guide rollers rotatably provided on a rotating member in front of each thread release means to guide the thread released by the thread release means; And a second guide roller rotatably provided in the apparatus frame above the rotating member so that each thread guided by each first guide roller is collected and guided to the winding apparatus. It may include.

The thread twist portion may further include a first tension adjusting means provided in a plurality of rotating members to adjust the tensile force of each thread released from each failure.

The first tension adjusting means may include: a first tension measuring member connected to the first guide roller to measure a tensile force of the thread to be released; Breaking member connected to the thread release means; And a control unit connected to the first tension measuring member and the braking member and configured to receive a tensile force measured by the first tension measuring member and to adjust the braking member to adjust the degree of failure. It may include.

The winding device may further include: a rail frame installed adjacent to the pretensioning device; A first winding part fixed to the rail frame; A second winding unit configured to adjust the length of the thread in which a plurality of strands to which the pretensioning force is applied in the preliminary pulling device are wound together with the first winding unit and installed on the rail frame to be movable; It may include.

The first winding unit is fixed support member is fixed to the rail frame; A movable support member movably installed on the fixed support member; A first drum rotatably provided at the movable support member; A second rotation driving means connected to the first drum to rotate the first drum and provided in the moving support member; And second tension adjusting means connected to the movable support member to adjust the tensile force of the thread wound between the first drum and the second drum included in the second winding. It may include.

The second tension adjusting means includes a second tension measuring member provided in the movable support member to measure the tensile force of the thread wound between the first drum and the second drum; A screw member connected to the second tension measuring member; And a tension control motor connected to the screw member and movable in the fixed support member. It may include.

The moving support member may be provided with a first thread bundle support member that is thread-hung.

The second winding unit moving member is provided to be movable in the rail frame; A second drum rotatably provided at the moving member; And a distance adjusting means provided in the moving member to adjust the position of the moving member in the rail frame. It may include.

The distance adjusting means includes a plurality of moving wheels provided on the moving member; And a distance adjusting motor connected to the moving wheel to drive the moving wheel. It may include.

The moving member may be provided with a position fixing cylinder for fixing the position in the rail frame of the moving member.

The second drum may be provided with cooling means.

The moving member may be provided with a second thread bundle supporting member to which the thread bundle is caught to be movable.

According to the embodiment of the present invention as described above, by applying a pre-tensioning force to the yarn for manufacturing the round sling, it is possible to prevent part of the yarn from sag when winding the yarn for the manufacture of the round sling.

In addition, according to an embodiment of the present invention, it is possible to adjust the tensile force of the yarn wound while winding the yarn to which pre-tensioning force is applied for the manufacture of a round sling.

And also according to the embodiment of the present invention, by adjusting the tension force of the winding coil for the manufacture of the round sling can be evenly tensioned the yarn forming the round sling.

In addition, according to the embodiment of the present invention, since the tensile force of the yarn forming the round sling is even, the durability of the round sling can be long lasting.

And also according to the embodiment of the present invention, it is possible to manufacture a round sling to have all the required tensile force, without limiting the magnitude of the tensile force of the round sling to be produced.

In order to help the understanding of the features of the present invention as described above, it will be described in more detail with respect to the round sling manufacturing apparatus associated with an embodiment of the present invention.

Hereinafter, exemplary embodiments will be described based on embodiments best suited for understanding the technical characteristics of the present invention, and the technical features of the present invention are not limited by the illustrated embodiments, It is to be understood that the present invention may be implemented as illustrated embodiments. Accordingly, the present invention may be modified in various ways within the technical scope of the present invention through the embodiments described below, and such modified embodiments fall within the technical scope of the present invention. And, in order to help the understanding of the embodiments described below, in the reference numerals described in the accompanying drawings, among the components that will have the same function in each embodiment, the related components are denoted by the same or extension numbers.

Embodiments related to the present invention are basically based on applying pre-tensioning force to the yarn for manufacturing the round sling and for adjusting the tension of the winding yarn for the manufacture of the round sling.

The apparatus 100 for manufacturing a round sling according to the present invention may include a pretensioning device 200 and a winding device 300 as shown in the embodiment shown in FIGS. 1A and 1B.

The pre-tensioning device 200 is configured to apply pre-tensioning force to each thread S by twisting the threads S of several strands. To this end, the pre-tensioning device 200 may include a device frame 210 and the thread twisting portion 220 as shown in the embodiment shown in Figures 1a and 1b, 2a and 2b.

The device frame 210 may have the same shape as the embodiment shown in FIGS. 1A, 1B, 2A, and 2B. However, the shape of the apparatus frame 210 is not limited to the illustrated embodiment and may be any shape.

Thread twist portion 220 is rotatably installed in the device frame 210 as shown in the embodiment shown in Figures 1a and 1b, 2a and 2b is to be configured to twist the thread (S) of several strands Can be. To this end, the thread twisting part 220 includes a rotating member 221, a thread release means 222, a plurality of first guide rollers 223, and a second guide roller 224 as shown in the illustrated embodiment. Can be.

The rotation member 221 may be connected to the first rotation driving means 226 provided in the device frame 210 and rotate as shown in the embodiment shown in FIGS. 2A to 2C. To this end, as shown in FIG. 2C, the first rotation drive means 226 includes a first rotary motor 226a provided in the apparatus frame 210, a rotation shaft 226d connected to the rotation member 221, and a first rotation drive 226d. It may be composed of a drive pulley 226c respectively provided on the single-use motor 226a and the rotating shaft 226d, and a drive belt 226b connecting each drive pulley 226c. However, the first rotary driving means 226 is provided in the device frame 210 and may be any one that can be connected to the rotating member 221 to rotate it. On the other hand, the device frame 210 may be provided with a brake cylinder 227 as shown in the embodiment shown in Figures 1a and 2a. The rotation of the rotating member 221 can be stopped by such a brake cylinder 227.

Thread release means 222 may be provided in a plurality along the circumference of the rotating member 221 as shown in Figures 1a and 2a. In the illustrated embodiment, the thread release means 222 is provided with six rotating members 221. However, the number of the thread release means 222 provided in the rotating member 221 is not limited to six, any number may be any two or more. The thread unwinding means 222 may be fitted with a failure (R) in which the thread S is wound as shown in FIGS. 4A and 4B. And it is comprised so that the thread S wound around the failure R may be loosened, while the failure R inserted in the thread release means 222 rotates. To this end, as shown in the embodiment shown in Figure 2b, the thread release means 222 is a support member 222a fixed to the rotating member 221, and a failure fitting member 222b rotatably connected to the support member 222a. And, it may be made of a fixing member (222c) for fixing so that the failure (R) fitted to the failure fitting member (222b) is not separated. However, the configuration of the thread releasing means 222 is not limited to the illustrated embodiment, and any configuration can be used as long as the thread R can be unwound while the thread R is inserted and rotated. .

The first guide roller 223 may be rotatably provided on the rotating member 221 in front of each thread release means 222, as shown in the embodiment shown in Figures 1a and 2a. By the first guide roller 223 as described above, the thread S released from the failure R by the thread release means 222 may be guided to the second guide roller 224. Therefore, the number of first guide rollers 223 provided on the rotating member 221 may be the same number as the thread release means 222. In the illustrated embodiment, the first guide roller 223 is provided with six rotating members 221 having the same number as the thread release means 222. However, the number of the first guide rollers 223 is not limited to the illustrated embodiment and may be any number.

The second guide roller 224 may be rotatably provided in the device frame 210 on the rotating member 221 as shown in Figures 1a and 1b, 2a and 2b. As shown in FIGS. 4A to 5B, each thread S guided by the plurality of first guide rollers 223 may be collected in the second guide roller 224, thus winding up the collected thread S. FIG. Guide to device 300.

On the other hand, the thread twist portion 220 may further include a first tension adjusting means 225 as shown in the embodiment shown in Figures 2a and 2b. By the first tension control means 225 it is possible to adjust the tensile force of the thread (S) released from the failure (R). The first tension adjusting means 225 may be provided in plurality in the rotating member 221 as shown in the illustrated embodiment. That is, the first tension adjusting means 225 may be the same number as the thread release means 222 like the first guide roller 223. In the illustrated embodiment, six first tension adjusting means 225 are provided in the rotating member 221 which is the same number as the unwinding means 222. However, the number of the first tension adjusting means 225 is not limited to the illustrated embodiment can be any number.

In order to adjust the tensile force of the thread (S) released from the failure (R), as shown in the embodiment shown in Figures 2a and 2b, the first tension adjusting means 225 and the first tension measuring member 225a, and braking The member 225b and the control unit 225c may be included.

The first tension measuring member 225a may be connected to the first guide roller 223 as in the embodiment shown in FIGS. 2A and 2B. By the first tension measuring member 225a as described above, the tensile force of the seal S passing through the first guide roller 223 by being released from the failure R can be measured. In the illustrated embodiment, the first tension measuring member 225a uses a load cell as an example. However, the first tension measuring member 225a may be any type as long as it is not limited to the load cell as shown in the illustrated embodiment and can measure the tensile force of the seal S.

The braking member 225b may be connected to the thread release means 222 as shown in the illustrated embodiment. In the illustrated embodiment, the braking member 225b is connected to the failure fitting member 222b of the thread release means 222.

In addition, the control unit 225c may be connected to the first tension measuring member 225a and the braking member 225b as shown in the illustrated embodiment. In the control unit 225c, the tensile force of the yarn S measured by the first tension measuring member 225a may be input. Therefore, when the measured tensile force of the thread S is not the desired tensile force, the control unit 225c adjusts the braking member 225b, and the rotation of the failure fitting member 222b in which the failure R is inserted and rotated. By adjusting the degree, it is possible to adjust the tensile force of the thread (S) released from the failure (R). That is, when the measured tensile force of the yarn (S) is greater than the desired tensile force, by loosening the braking member (225b) so that the failure fitting member (222b) can easily rotate, the tensile force of the unwinding yarn (S) can be reduced. . And, if the measured tensile force of the yarn (S) is smaller than the desired tensile force, by tightening the braking member (225b) to prevent the failure fitting member (222b) to easily rotate, the tensile force of the thread (S) to be released can be increased. .

The winding device 300 may be configured to manufacture a round sling by winding a thread C of several strands to which a pretensioning force is applied by the pretensioning device 200 to be coated with a coating C. To this end, the winding device 300 is a rail frame 310, the first winding portion 320 and the second winding portion 330 as shown in the embodiment shown in Figures 1a and 1b, 3a and 3b. It may include.

Rail frame 310 may be installed adjacent to the pre-tensioning device 200 as shown in the embodiment shown in Figures 1a and 1b.

The first winding unit 320 may be fixed to the rail frame 310 as shown in the embodiment shown in Figures 3a and 3b. The first winding unit 320 is a fixed support member 321, the movable support member 322, the first drum 323, the second rotation driving means 324, and the second tension adjusting means 325 It may include.

The fixed support member 321 may be installed to be fixed to the rail frame 310 as shown in the embodiment shown in Figures 3a and 3b.

3A and 3B, the movable support member 322 may be installed to be movable on the fixed support member 321.

In addition, the first drum 323 may be rotatably provided on the movable support member 322 as shown in the embodiment illustrated in FIGS. 3A and 3B.

Meanwhile, as shown in FIGS. 3A and 3B, the second rotation driving means 324 may be provided in the movement supporting member 322. The second rotation driving means 324 may be connected to the first drum 323 to drive the first drum 323. To this end, the second rotary drive means 324 is the second rotary motor 324a and the first drum 323 and provided in the moving support member 322, as shown in the embodiment shown in Figures 3a and 3b A drive sprocket 324c provided to each of the second rotary motor 324a, and a drive connecting the drive sprocket 324c of the first drum 323 and the drive sprocket 324c of the second rotary motor 324a. It may be made of a chain (324b). However, the configuration of the second rotation driving means 324 is not limited to the illustrated embodiment, any configuration may be used as long as it is connected to the first drum 323 to rotate the first drum 323. .

The second tension adjusting means 325 may be connected to the moving support member 322 as shown in the embodiment shown in Figures 3a and 3b. By the second tension adjusting means 325, it is possible to adjust the tensile force of the thread S wound between the first drum 323 and the second drum 332 to be described later. To this end, as shown in the illustrated embodiment, the second tension adjusting means 325 may include a second tension measuring member 325a, a screw member 325b, and a tension control motor 325c.

The second tension measuring member 325a may be provided in the movable support member 322 as shown in the embodiments illustrated in FIGS. 3A and 3B. The tensile force of the thread S wound between the first drum 323 and the second drum 332 may be measured by the second tension measuring member 325a. In the illustrated embodiment, the second tension measuring member 325a uses the load cell as an example of the first tension measuring member 225a. However, the second tension measuring member 325a is not limited to the load cell as shown in the illustrated embodiment, and may measure the tensile force of the thread S wound between the first drum 323 and the second drum 332. Anything is possible.

The screw member 325b may be connected to the second tension measuring member 325a as shown in FIGS. 3A and 3B.

3A and 3B, the tension control motor 325c may be connected to the screw member 325b. The tension control motor 325c may be provided to be movable on the fixed support member 321. The screw member 325b is rotated by the driving of the tension control motor 325c, and thus the moving support member 322 can move from the fixed support member 321.

The moving support member 322 may move from the fixed support member 321 to adjust the tensile force of the thread S wound between the first drum 323 and the second drum 332. For example, the yarn S is wound between the first drum 323 and the second drum 332, and the yarn S first wound between the first drum 323 and the second drum 332 and then. The length of the yarn S wound around is slightly different by the thickness of the yarn S. That is, it becomes longer. In this state, if the distance between the first drum 323 and the second drum 332 does not change, that is, does not decrease slightly, the seal S between the first drum 323 and the second drum 332. According to this winding, the tensile force applied to the thread S gradually increases. Accordingly, the tensile force of the thread S wound between the first drum 323 and the second drum 332 is not evenly distributed. In order to prevent this, that is, in order to distribute the tensile force of the thread S wound between the first drum 323 and the second drum 332 evenly, the second tension control of the embodiment shown in Figures 3a and 3b In the means 325, first, the tensile force of the thread S wound between the first drum 323 and the second drum 332 is measured by the second tension measuring member 325a. When the tensile force of the measured thread S is greater than the tensile force of the previously measured thread S, the moving support member 322 is driven by driving the tension control motor 325c to rotate the screw member 325b. It is allowed to move slightly towards the drum 332, for example by the thickness of the seal S. By the movement of the movable support member 322, the distance between the first drum 323 and the second drum 332 is slightly reduced. The movement of the movable support member 322 is made until the magnitude of the tensile force of the yarn S measured by the second tension measuring member 325a is equal to the magnitude of the tensile force of the yarn S measured before. . Through the above process, the tensile force of the thread S wound between the first drum 323 and the second drum 332 may be even.

The second winding unit 330 may be installed to be movable on the rail frame 310 as shown in the embodiment shown in Figures 3a and 3b. In addition, the thread (S) of several strands to which the pre-tensioning force is applied in the pre-tensioning device 200, as described above, the second winding 330, that is, the second drum 332 of the second winding 330 to be described later. And the first winding part 320, that is, the first drum 323 of the first winding part 320. On the other hand, since the second winding part 330 is installed to be movable in the rail frame 310, the distance between the first drum 323 and the second drum 332 can be adjusted. Accordingly, the length of the thread S wound between the first drum 323 and the second drum 332, that is, the length of the round sling to be manufactured can be adjusted.

The second winding part 330 may include a moving member 331, a second drum 332, and a distance adjusting means 333, as shown in FIGS. 3A and 3B.

As shown in FIGS. 3A and 3B, the moving member 331 may be provided to be movable on the rail frame 310.

In addition, the second drum 332 may be rotatably provided on the moving member 331 as shown in the embodiment of FIGS. 3A and 3B.

And, the distance adjusting means 333 may be provided in the moving member 331 as shown in the embodiment shown in Figures 3a to 3c. By the distance adjusting means 333 it is possible to adjust the position in the rail frame 310 of the moving member 331. The distance adjusting means 333 may include a moving wheel 333a and a distance adjusting motor 333b as in the embodiment shown in FIGS. 3B and 3C.

A plurality of moving wheels 333a may be provided in the moving member 331 as shown in FIGS. 3B and 3C. The moving wheel 333a may contact the rail frame 310. Therefore, the moving member 331 can be easily moved in the rail frame 310.

The distance adjusting motor 333b may be connected to the moving wheel 333a to drive the moving wheel 333a. Accordingly, when the distance adjusting motor 333b is driven, the moving wheel 333a is rotated, thereby moving the moving member 331 in the rail frame 310. As such, the moving member 331 moves in the rail frame 310 to adjust the distance between the first drum 323 and the second drum 332. As a result, the length of the thread S wound between the first drum 323 and the second drum 332, that is, the length of the round sling to be manufactured can be adjusted.

On the other hand, the moving member 331 may be provided with a position fixing cylinder 334, as shown in Figure 1b and 3b. The position fixing cylinder 334 can be fixed to the position in the rail frame 310 of the moving member 331. Thus, the length of the round sling to be manufactured can be set.

Hereinafter, the operation of one embodiment of the round sling manufacturing apparatus 100 according to the present invention will be described with reference to FIGS. 4A to 6B.

First, as shown in FIGS. 4A and 4B, a failure R is inserted into the failure fitting member 222b of the thread release means 222 of the thread twist part 220. Then, the failure (R) is fixed to the fixing member (222c) to be fixed to the failure fitting member (222b). On the other hand, in the illustrated embodiment, the thread release means 222 is provided with six rotating member 221. Therefore, all the failures R may be fixed to the failure fitting members 222b of the six thread release means 222, and the failure R may be fixed to the failure fitting members 222b of the part thread release means 222. It can also be fixed. When fixing the failure R to the failure fitting member 222b of some of the thread release means 222, the failure R must be fixed to the failure fitting member 222b of the at least two thread release means 222. , Twist the thread (S) of several strands released from each failure (R) can be applied to the pre-tensioning force on each thread (S).

After fixing the failure (R) to each of the failure fitting member (222b), as shown in Figures 4a and 4b to loosen the thread (S) wound on the failure (R), passing through the first guide roller 223 do. Thereafter, the threads S of several strands passing through each of the first guide rollers 223 are collected to pass through the second guide rollers 224 as shown.

On the other hand, as shown in Figures 4a and 4b is installed to support the cover support tube (P) coated with the corrugated coating (C) on the second winding portion 330 by the support (M). Then, the thread (S) of several strands past the second guide roller 224 passes through the first drum 323, and then passes through the coated support pipe (P). Then, the thread S of several strands passing through the coating support pipe (P) is wound around the second drum 332, and then the first drum 323 is wound around the second drum (332). As a result, the first guide roller 224 passes through the thread S of several strands passing through the first drum 323. When this is tied, as shown, the first drum 323 in the state that the thread (S) of several strands guided from the pre-tensioning device 200 has passed through the coated support pipe (P) coated with the corrugated coating (C) It is wound in a ring form between the second drum 332.

As shown in Figures 4a and 4b, the seal S may be installed in the round sling manufacturing apparatus 100 so that the seal S passes into the sheath C using the sheath support pipe P. As shown in FIGS. 6A and 6B, the seal S may be installed in the round sling manufacturing apparatus 100 so that the seal S passes through the inside of the sheath C without using the sheath support pipe P. FIG.

That is, the cover C is first folded in half as shown in the dotted circle in Fig. 6B by a cover folding device (not shown). Then, while one side end of the cover C folded in half is supported by the support table M as shown in FIGS. 6A and 6B, the cover C folded in half starts from the first drum 323. The second drum 332 as shown after passing through the second drum 332 is installed to the past position.

6A and 6B, the sheaths of several strands guided by the second guide roller 224 of the preliminary tensioning device 200 are folded in half with the first drum 323. Pass the inside of the (C) and the second drum 332 again to pass through the first drum 323. Subsequently, when the yarns S that meet in the first drum 323 are bundled, the threads S of several strands guided from the pre-tensioning device 200 pass through the inside of the sheath C folded in half as shown. In one state, the first drum 323 and the second drum 332 is wound in a ring shape.

As described above, when the seal S is installed in the round sling manufacturing apparatus 100 so that the seal S passes through the inside of the sheath C without using the sheath support pipe P, the sheath C and the second sheath. The heat generated by the friction with the drum 332 is generated. Therefore, in order to prevent the temperature rise of the cladding C and the second drum 332 due to frictional heat, the cooling means 335 may be provided in the second drum 332 as shown in the dotted circle of FIG. 6A. have.

On the other hand, the distance of the distance adjusting means 333 before winding the thread (S) of several strands guided from the preliminary tensioning device 200 in a ring form between the first drum 323 and the second drum 332 as described above. By driving the adjusting motor 333b to rotate the moving fan 333a, the position of the moving member 331 in the rail frame 310 is adjusted. Then, the position between the first drum 323 and the second drum 332 by fixing the position in the rail frame 310 of the moving member 331 by the position fixing cylinder 334, that is round to be manufactured Set the length of the sling.

As described above, the first rotary motor 226a of the first rotary drive means 226 after installing the thread (S) of a plurality of round slings in the pre-tensioning device 200 and the winding device 300 ) And the second rotary motor 324a of the second rotation driving means 324 rotate the rotating member 221 and the first drum 323 as shown in FIGS. 5A and 5B, respectively. .

As the rotating member 221 rotates, the threads S of several strands released from each failure R are twisted with each other while passing through the first guide roller 223. And a preliminary pulling force is applied to each chamber S by this. On the other hand, each thread (S) is twisted while the tensile force is adjusted by the first tension adjusting means 225 as described above.

In this way, the strands (S) of several strands twisted with each other and applied with pre-tensioning force are passed through the first drum 323 and the coated support pipe P through the second guide roller 224, and wound on the second drum 332. Afterwards, it is rewound to the first drum 323. When this process is repeated, as shown in FIGS. 5A and 5B, the yarns S of several strands to which pre-tensioning force is applied in the pre-tensioning device 200 between the first drum 323 and the second drum 332. It will be wound up a plurality of times. On the other hand, the number of windings of the thread S of several strands wound between the first drum 323 and the second drum 332 may vary depending on the required tensile force of the round sling to be manufactured.

On the other hand, when the thread (S) of several strands preliminary tension applied between the first drum 323 and the second drum 332 is wound a plurality of times, as described above by the second tension adjusting means 325 The moving support member 322 moves slightly from the rail frame 310 toward the second drum 332 so that the tensile force of the thread S wound between the first drum 323 and the second drum 332 is evenly distributed. You can do that.

In this way, in the state where the thread S of several strands to which the pre-tensioning force is applied passes through the coating support tube P coated with the corrugated coating C, the preliminary space between the first drum 323 and the second drum 332 is preliminary. After a plurality of strands (S) to which tensile force is applied is wound a plurality of times by the required tensile force of the round sling to be manufactured, the moving member 331 is moved toward the first drum 323 by using the distance adjusting means 333. That is, the second drum 332 is moved toward the first drum 323. Subsequently, the first drum 323 and the second drum (S) wound between the first drum 323 and the second drum 332 passed through the coated support pipe P on which the corrugated coating C is coated ( 332). On the other hand, as shown in the dashed circle in Fig. 4B, the cross section of the coated support pipe P is not circular but circular. Therefore, the coating support pipe P can be separated from the coating C. FIG. Accordingly, the plurality of strands S wound around the first drum 323 and the second drum 332 a plurality of times and applied with pretension force are separated, and then the covering support tube P is covered with the covering C. Separate from. Then, when the corrugated sheaths C are stretched along the lengths of the several strands of yarns S that have been wound a plurality of times and subjected to pretensioning force, the plurality of yarns S are positioned inside the sheaths C. FIG. After that, when both ends of the coating C are sealed, the round sling is completed. 6A and 6B, when the cover support tube P is not used, a plurality of times is passed between the first drum 323 and the second drum 332 through the inside of the cover C folded in half. After the pre-tensioning force and evenly distributed tensile yarns (S) wound in the first drum (323) and the second drum (332) as described above, and wound in a plurality of times and preliminary tension Unfold the sheath (C) folded in half along the length of the thread (S) of the various strands applied. Then, when both ends of the covering C are sealed, the round sling is completed.

On the other hand, when the required tensile force of the round sling to be manufactured is large, as described above, the tensile force is evenly distributed on the threads S of several strands to which pre-tensioning force is applied between the first drum 323 and the second drum 332. Even if it is wound as many times as possible, the round sling may not be manufactured to have the required tensile force. In this case, a plurality of yarn bundles (B) wound a plurality of times between the first drum 323 and the second drum 332 to be evenly distributed so that the threads S of several strands to which preliminary tensile force is applied are evenly distributed. The round sling can be manufactured to have a tensile force that becomes.

To this end, as illustrated in FIGS. 7A and 7B, the connection support member 322c is connected to the first winding part 320, that is, the moving support member 322 of the first winding part 320. As shown, the first thread bundle support member 322a may be provided. In addition, the connection support member 322c may also be provided with an auxiliary thread bundle support member 322b. In the illustrated embodiment, although the first thread bundle support member 322a and the auxiliary thread bundle support member 322b are provided in the connection support member 322c connected to the movable support member 322, It may be provided directly. And, as shown in the moving member 331 of the second winding part 330, that is, the second winding part 330 may be provided with a fixing member 331c, the second thread bundle support member ( 331a may be provided to be movable on the connection fixing member 331c, and the connection fixing member 331c may be provided to fix the moving cylinder 331b, and the second seal bundle supporting member 331a may be a moving cylinder. It is connected to the 331b can be moved in the connection fixing member (331c).

By such a configuration, as shown in the drawing, the yarn bundles of several strands to which pre-tensioning force is applied are wound a plurality of times between the first drum 323 and the second drum 332 so that the tensile force is evenly distributed ( The second drum 332 is moved toward the first drum 323 by using the distance adjusting means 333 while passing B) through the coated support pipe P coated with the corrugated coating C. The drum 323 and the second drum 332 are separated. Then, the thread bundle B thus separated is hung on the first thread bundle support member 322a, the auxiliary thread bundle support member 322b, and the second thread bundle support member 331a, as shown. The cylinder 331b is operated to reverse the second thread bundle support member 331a in the drawing so that the thread bundle B has a predetermined tensile force. Here, the auxiliary thread bundle support member 322b has a plurality of strands S of which the pre-tension force is applied between the first drum 323 and the second drum 332 by the yarn bundle B, and the tensile force is evenly distributed. It is provided so as not to interfere with winding as much as possible.

In this way, in the state that the thread (B) of several strands to which the pre-tensioning force is applied passes the bundle bundle (B) wound a plurality of times so that the tensile force is evenly distributed, through the corrugated coating (C) coated coating support pipe (P), As shown in the drawing, the first thread bundle support member 322a, the auxiliary thread bundle support member 322b, and the second thread bundle support member 331a are hung to have a predetermined tensile force, and then the pre-tensioning device as described above. The first and second drums 323 and 2 are passed through a plurality of new strands S guided by the second guide roller 224 of the 200 through a coated support tube P coated with a corrugated sheath C. (332) between the winding in the form of a tie and tie. When the first drum 323 is rotated in this state, one or more thread bundles B pass through the coating support pipe P coated with the corrugated sheath C, thereby making another yarn bundle B. It becomes possible.

After repeating this process to make several bundles of yarns B passing through the corrugated support tube P coated with corrugated sheath C, they are placed between or between the first drum 323 and the second drum 332. 1 is separated from the thread bundle supporting member 322a, the auxiliary thread bundle supporting member 322b, and the second thread bundle supporting member 331a, and the coating support tube P is separated from the coating C, and then the coating C is applied. If spreading along the length of the yarn bundle (B) and sewing both ends of the coating (C), it is possible to produce a round sling with a larger tensile force.

7A and 7B show the case where the coated support tube P coated with the corrugated sheath C is used, but the above-described case is also used when the sheath C folded in half as shown in FIGS. 6A and 6B. As can be made a plurality of yarn bundles (B) to produce a round sling.

As such, using the round sling manufacturing apparatus 100 according to the present invention, by applying a pre-tensioning force to the yarn for manufacturing the round sling can prevent the part of the thread from sag when winding the yarn for the manufacture of the round sling. have.

In addition, it is possible to adjust the tensile force of the winding yarn while winding the yarn to which pre-tensioning force is applied for the manufacture of a round sling.

Thereby, the tensile force of the yarn which comprises a round sling can be made even.

In addition, since the tensile force of the yarn forming the round sling is even, the durability of the round sling can be long lasting.

In addition, the round sling may be manufactured to have all the required tensile forces without limiting the magnitude of the tensile force of the round sling to be manufactured.

The above-described round sling manufacturing apparatus is not limited to the configuration of the above-described embodiments, but the embodiments may be configured by selectively combining all or some of the embodiments so that various modifications can be made. have.

Figure 1a is a plan view showing an embodiment of a round sling manufacturing apparatus according to the present invention.

Figure 1b is a front view showing an embodiment of a round sling manufacturing apparatus according to the present invention.

Figure 2a is a plan view showing a pre-tensioning device of one embodiment of a round sling manufacturing apparatus according to the present invention.

Figure 2b is a front view showing a pre-tensioning device of one embodiment of a round sling manufacturing apparatus according to the present invention.

FIG. 2C is a cross-sectional view taken along the line AA ′ of FIG. 2B.

Figure 3a is a plan view showing a winding apparatus of an embodiment of a round sling manufacturing apparatus according to the present invention.

Figure 3b is a front view showing a winding apparatus of an embodiment of a round sling manufacturing apparatus according to the present invention.

3C is a cross-sectional view taken along line BB ′ of FIG. 3A.

Figures 4a and 4b is a view showing the operation of one embodiment of the round sling manufacturing apparatus according to the present invention, it is a view showing that the seal is installed in the round sling manufacturing apparatus so that the thread passes through the coating using a coating support tube. .

Figures 5a and 5b is a view showing the operation of one embodiment of the round sling manufacturing apparatus according to the present invention, applying the pre-tensioning force to the yarn installed in the round sling manufacturing apparatus and winding the yarn while adjusting the tensile force of the pre-tensioned yarn It is a figure which shows that.

6a and 6b are views showing the operation of one embodiment of the round sling manufacturing apparatus according to the present invention, showing that the seal is installed in the round sling manufacturing apparatus so that the thread passes into the coating without using the coating support tube. to be.

7a and 7b are views showing the operation of another embodiment of the round sling manufacturing apparatus according to the present invention.

          Explanation of symbols on the main parts of the drawings

100: round sling manufacturing apparatus 200: pre-tensioning device

210: device frame 220: thread tail

221: rotating member 222: thread release means

222a: support member 222b: failure fitting member

222c: fixing member 223: first guide roller

224: second guide roller 225: first tension control means

225a: first tension measuring member 225b: braking member

225c: control unit 226: first rotation drive means

226a: first rotational motor 226b: drive belt

226c: driving pulley 226d: rotating shaft

227: Brake cylinder 300: Winding device

310: rail frame 320: the first winding

321: fixed support member 322: movable support member

322a: first thread bundle support member 322b: auxiliary thread bundle support member

322c: connecting support member 323: first drum

324: second rotary drive means 324a: second rotary motor

324b: Drive Chain 324c: Drive Sprocket

325: second tension adjusting means 325a: second tension measuring member

325b: screw member 325c: tension control motor

330: the second winding 331: moving member

331a: second seal bundle supporting member 331b: moving cylinder

331c: connection fixing member 332: second drum

333: distance adjusting means 333a: moving wheel

333b: distance control motor 334: position fixing cylinder

335 cooling means S: seal

R: failure C: sheath

P: coated support pipe M: support

B: thread bundle

Claims (14)

Pre-tensioning device 200 configured to apply a pre-tensioning force to each thread (S) by twisting the thread (S) of several strands; And A winding device (300) configured to manufacture a round sling by winding a seal (C) of several strands (S) to which a pretensioning force is applied by the pretensioning device (200) to be coated; Round sling manufacturing apparatus comprising a. The method of claim 1, wherein the pre-tensioning device 200 Device frame 210; And A thread twist part 220 rotatably installed on the apparatus frame 210 and configured to twist a plurality of strands of thread S; Round sling manufacturing apparatus comprising a. The method of claim 2, wherein the thread twist portion 220 A rotating member 221 connected to the first rotating driving means 226 provided in the apparatus frame 210 and rotating; A thread unwinding means (222) provided with a plurality of threads along the circumference of the rotary member (221) to allow the thread (S) wound on the failure (R) to be released while the thread (R) is inserted and rotated; A plurality of first guide rollers 223 rotatably provided on the rotating members 221 in front of the respective thread release means 222 to guide the yarn S released by the thread release means 222; And Each seal S guided by each of the first guide rollers 223 is rotatably provided on the apparatus frame 210 on the rotating member 221 so as to be collected and guided to the winding device 300. Second guide roller 224; Round sling manufacturing apparatus comprising a. According to claim 3, The thread twist portion 220 is provided with a plurality of first tension adjusting means 225 provided in the rotating member 221 to adjust the tensile force of each thread (S) released from each failure (R) Round sling manufacturing apparatus characterized in that it further comprises a). The method of claim 4, wherein the first tension control means (225) A first tension measuring member 225a connected to the first guide roller 223 to measure a tensile force of the thread S being released; Breaking member 225b connected to the thread release means 222; And It is connected to the first tension measuring member 225a and the braking member 225b and receives the tensile force measured by the first tension measuring member 225a to adjust the braking member 225b to prevent the failure (R). A control unit 225c for adjusting the degree of rotation; Round sling manufacturing apparatus comprising a. The method of claim 1, wherein the winding device 300 A rail frame 310 installed adjacent to the pre-tensioning device 200; A first winding part 320 installed to be fixed to the rail frame 310; Thread (S) of several strands (S) applied to the pre-tensioning force in the preliminary pulling device 200 is wound together with the first winding part 320 and movable on the rail frame (310). A second winding unit 330 configured to adjust the length of the second winding unit 330; Round sling manufacturing apparatus comprising a. The method of claim 6, wherein the first winding unit 320 is A fixed support member 321 installed to be fixed to the rail frame 310; A movable support member 322 movably installed on the fixed support member 321; A first drum 323 rotatably provided at the movable support member 322; A second rotation driving means 324 connected to the first drum 323 to rotate the first drum 323 and provided in the movable support member 322; And An agent connected to the movable support member 322 to adjust the tensile force of the thread S wound between the first drum 323 and the second drum 332 included in the second winding part 330. Two tension adjusting means 325; Round sling manufacturing apparatus comprising a. The method of claim 7, wherein the second tension control means (325) A second tension measuring member 325a provided in the movable support member 322 to measure a tensile force of the yarn S wound between the first drum 323 and the second drum 332; A screw member 325b connected to the second tension measuring member 325a; And A tension control motor 325c connected to the screw member 325b and movable to the fixed support member 321; Round sling manufacturing apparatus comprising a. The apparatus for manufacturing a round sling according to claim 7 or 8, wherein the moving support member (322) is provided with a first thread bundle support member (322a) on which a thread bundle (B) is caught. The method of claim 6, wherein the second winding unit 330 is A moving member 331 provided to be movable in the rail frame 310; A second drum 332 rotatably provided at the moving member 331; And Distance adjusting means (333) provided on the moving member (331) to adjust the position of the moving member (331) in the rail frame (310); Round sling manufacturing apparatus comprising a. The method of claim 10, wherein the distance adjusting means 333 A plurality of moving wheels 333a provided on the moving member 331; And A distance adjusting motor 333b connected to the moving wheel 333a to drive the moving wheel 333a; Round sling manufacturing apparatus comprising a. The method of claim 10 or 11, wherein the movable member 331 is characterized in that the position fixing cylinder 334 for fixing the position of the movable member 331 in the rail frame 310 is provided. Round sling manufacturing apparatus. The apparatus of claim 10 or 11, wherein the second drum (332) is provided with cooling means (335). 12. The apparatus for manufacturing a round sling according to claim 10 or 11, wherein the moving member (331) is provided with a second thread bundle supporting member (331a) to which the thread bundle B is movable.

Images