KR19990066353A - Drawing device of fully automatic drawing system - Google Patents

Abstract

The present invention relates to a drawing apparatus of a fully automatic drawing system for maximizing the precision of the workpiece to be drawn by using the LM guide, the means 10 for supplying the raw material (A), the raw material (A) The means 20 for conveying, the means 30 for preparing and pressurizing the transferred raw material A to enter into the drawing step, the mold means 40 for extruding and processing the prepared, pressurized raw material A, It consists of a means (50) for drawing the workpiece (A ') extruded from the mold means 40 in the extrusion direction and means (60) for discharging the drawn workpiece (A') to the outside, In the automatic drawing system in which a series of steps are automatically operated from supplying step (A) to discharging the drawn workpiece A ', the drawing means 50 is a linear guide for guiding linear motion. 52; A drive unit provided at both sides of the linear guide 52 and driving the link chain 53c by an electric force; A drawing portion which is slidably engaged on the linear guide 52 and draws out the material extruded from the mold means 40 by selective engagement with the link chain 53c; And a return drive unit for returning the drawn portion moved by the link chain 53c to its original position.

Description

Drawing device of fully automatic drawing system

The present invention relates to a drawing device of a fully automatic drawing system, and more particularly to a drawing device of a fully automatic drawing system to maximize the precision of the workpiece to be drawn by using the LM guide.

In general, the drawing process refers to a method in which a metal rod or wire or tube is tensioned through a mold apparatus and a rod, line or tube member having a cross section like the shape of a mold apparatus hole is usually cold rolled. (Iii) Tungsten and molybdenum are drawn at high temperature.

In a conventional drawing apparatus, a pneumatic cylinder has been used as a drawing driving means for drawing a workpiece that is extruded through a mold apparatus. However, since the air pressure of the pneumatic cylinder using the air pressure as the working fluid is a compressive fluid, responsiveness is not very good.

Poor responsiveness means that high precision cannot be expected when processing raw materials. In addition, pneumatic cylinders require additional equipment such as an air tank in addition to a compressor that compresses air in the atmosphere, a cooler that cools the compressed air, and a drain separator that removes moisture or foreign matter in the compressed air. There was this rising issue.

Accordingly, an object of the present invention is to provide a drawing device of a fully automatic drawing system to maximize the precision of the workpiece to be drawn by using the LM guide as an object to solve the above problems.

The present invention devised to achieve the above object, the means for supplying the raw material, the means for transferring the supplied raw material, the means for preparing and pressurizing the transferred raw material into the drawing step, the preparation, pressurized circle It is composed of a mold means for extruding the raw material processing, a means for drawing the processed material extruded from the mold means in the extrusion direction and a means for discharging the drawn processing material to the outside, the raw material drawn from the supply step In the automatic drawing system in which a series of steps are automatically operated up to the step of discharging

The drawing means includes a linear guide for guiding linear motion; A driving unit provided at both sides of the linear guide and driving the link chain by an electric force; A drawing portion which is slidably engaged on the linear guide and draws the material extruded from the mold means by selective engagement with the link chain; And a return driving unit for returning the drawn portion moved by the link chain to its original position.

1 is a front view showing the whole of the fully automatic drawing system according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. FIG.

Figure 3 is a plan view showing an enlarged view of the supply means of the present invention.

Figure 4a is an enlarged front view of the transfer means of the present invention.

Figure 4b is an enlarged configuration diagram of the main portion of Figure 2 with respect to the conveying means.

Fig. 5A is an enlarged front view of the preparation / pressure means of the present invention.

5B is a plan view of FIG. 5A.

Figure 6 is a front sectional view showing a mold means of the present invention.

Figure 7a is a plan view showing a drawing means of the present invention.

FIG. 7B is a front view of FIG. 7A; FIG.

Figure 8a is an enlarged front view of the discharge means of the present invention.

8B is a diagram illustrating the right side of FIG. 8A.

<Description of the symbols for the main parts of the drawings>

50: drawing means, 51: base body,

52: linear guide, 53: drive motor,

53a: drive sprocket, 53b: driven sprocket,

53c: link chain, 54: carriage,

55: drawing clamper, 55a: cylinder,

55b: piston rod, 55c: clamp block,

56: hook hook, 56a: hinge,

57: carriage return motor, 58: belt,

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail based on attached drawing.

As shown in FIG. 1, the automatic drawing system mounts one raw material 10 to be processed, such as a pipe, one by one, and supplies the chain conveyor 10 to supply the mounted raw material A at equal intervals 10. )and; A conveying means 20 for clamping one or more raw materials A from the supply means 10 to a predetermined horizontal distance; Preparation / pressurizing means (30) for preparing the raw material (A) clamped by being interlocked vertically by the drive of the transfer means (20) to carry out the drawing step and simultaneously pressing in one direction; A mold means (40) provided near the preparation / pressing means (30) in the pressing direction and causing the raw material (A) to be extruded through the hole by the pressing force; Drawing means 50 is installed to be loaded to a predetermined horizontal distance from the mold means 40, the drawing means 50 to hold one end of the raw material (A) that is extruded through the mold means 40 to draw a pipe (A ') of the finished product is formed ); And a discharging means (60) installed at one side of the drawing means (50) and receiving the pipe (A ') of the finished product completely drawn out and discharging to the outside.

In particular, the drawing means 50 of the present invention in the automatic drawing system includes a linear guide 52 for guiding linear motion; A drive unit provided at both sides of the linear guide 52 and driving the link chain 53c by an electric force; A drawing portion which is slidably engaged on the linear guide 52 and draws out the material extruded from the mold means 40 by selective engagement with the link chain 53c; It has a configuration including a return drive unit for returning the draw portion moved by the link chain 53c to its original position.

The overall configuration of the apparatus including the drawing means which is the subject matter of the present invention will be described in detail as follows.

Supply means (10)

2 and 3, the supply means 10 is a chain conveyor in which a link chain 11 connected in an endless track is hung on a driving sprocket 12a and a driven sprocket 12b. The chain conveyor can be installed at a constant equal intervals 2EA or 3EA as one constituent means, one side of the drive motor 13 is rotated in one direction so as to drive the chain conveyor of the above configuration is configured. A drive pulley 14a is press-fitted to the motor shaft of the drive motor 13, and a driven pulley 14b and one side of the drive sprocket 12a on one side of the drive sprocket 12a on the same line to transfer power to the drive sprocket 12a. The belt 15 etc. which are combined with each pulley 14a, 14b are provided. In addition, the power transmission shaft 16 is fitted in such a manner that the power of the drive motor 13 is equally transmitted to the respective drive sprockets 12a of the chain conveyor.

On the other hand, the link chain 11 is connected to each other connected to the link chain 11 is provided with a plurality of transport blocks 17 for supplying and conveying the pipe-shaped raw materials one by one at regular intervals, the transfer block 17 The raw material supply of is made possible by the supply chute 18 which is sequentially introduced as shown in FIG.

In addition, since the link chain 11 has a constant length for supply, deflection due to tension is inevitably generated. Since this deflection phenomenon may cause a large malfunction in the action of the conveying means 10 to be described later, a guider 19 for guiding the sliding of the link chain 11 and preventing the chain from sagging is constructed, and the guider ( 19 is fixed by the stable rack 19a.

Transport Means (20)

The conveying means 20 is provided on the upper side of the support plate 21 fixed to the fixed body in order to have a constant vertical height in Figures 4a and 4b and the preparation means and pressure means 30 to be described later The linear guide block 22 in a fixed horizontal length direction is fixedly installed so as to fall in the range of?, And a slider 23 sliding on the linear guide block 22 in the length range of the block is coupled. On the other hand, driving sprockets 22a and driven sprockets 22b are provided on both sides of the linear guide block 22 in the same manner as the driving method of the supply means 10, and each sprocket 22a and 22b has a link chain. It is comprised so that 22c may be caught and a driving force may be transmitted. The drive of the link chain 22c is driven by a drive motor 24 fixed to the support plate 21 adjacent to the drive sprocket 22a, a drive pulley 24a pushed into the motor shaft, and the drive sprocket 22a. Driven pulley 24b coupled to each other and each pulley 24a and 24b are connected to each other, and is possible by the configuration of a belt 24c for transmitting the driving force of the drive motor 24 to the link chain 22c. Done.

The slider 23 described above is fixed to one end of the link chain 22c that is linearly moved by the driving force of the driving motor 24, thereby sliding left and right.

In addition, the slider 23 is provided in the vertical direction, and is provided with a cylinder 25 for generating a stroke in a predetermined vertical range on the piston rod 25a by the flow of a fluid such as pneumatic or hydraulic pressure, the piston rod At one end of 25a, a plate-shaped finger plate 26 that is interlocked with the stroke is fixed.

On the other hand, at the bottom of the finger plate 26, two pistons (not shown) allow two piston rods 27a fixed to each piston to move symmetrically with each other due to inflow or outflow of fluid such as pneumatic or hydraulic pressure. Fingers of the cylinder type 27 is configured, the number of installation can be configured in the singular or plural in some cases.

At each end of the piston rod 27a of the finger 27, the clamper 28 is symmetrically configured to clamp or unclamp the raw material A supplied by the slider 23 to the supply means 10. It is.

In addition, the finger plate 26 which moves vertically by the piston rod 25a of the cylinder 25 is provided with the positioning rod 29 so that only vertical movement is possible, The positioning rod 29 is the slider 23 It is configured to slide in).

Preparation and Pressurization Means (30)

As shown in Figs. 5A and 5B, the preparation / pressing means 30 is configured to be vertically changed in position. The reason is that the height of the mold means 40 to be described later is higher than the preparation / pressure means 30 in the initial state, so that the raw material A transferred by the conveying means 20 is prepared in the set-up state. This is described in more detail as follows.

On the upper portion of the multi-stage base body 31 fixedly installed on the fixed bottom body, a lifting frame 32 of a rectangular frame, which is not integral with the base body 31, is positioned. Each corner portion of the lifting table 32 is provided with a screw rod 32a which is formed in a vertical length direction and has a threaded portion at its outer circumference, and at the corresponding point of the base body 31 opposite to the rod 32a. It is installed to screw together. On the other hand, in the longitudinal direction of the lifting table 32, a portion of the outer circumferential surface is formed such that the screw portion such as the gear of the worm is rotated so that the rotating power screw rods 33a and 33b are engaged with each screw rod 32a. It is installed.

On the other hand, a driving motor 34 for generating a driving force is provided on the proximal side of one side of the power screw rod 33a, and the power on the same drive direction line of the driving pulley 34a and the driving pulley 34a is provided on the shaft of the motor. A driven pulley 34b is provided at the tip of the screw rod 33a, and the pulleys 34a and 34b are connected to each other by a belt 34c. In addition, since one side of the power screw rod 33a, which receives the driving force by the driving of the motor 34, has to be transmitted to the power screw rod 33b on the other side, the power screw rod 33a. The cross screw shaft 35 engaged with the screw rods 33a and 33b and orthogonal to (33b) is configured to rotate. Meanwhile, at one end of the power screw rod 33b, a rotary electrically connected to the driving motor 34 to detect the rotational speed of the power screw rods 33a and 33b to control the vertical variable height of the lifting table 32. The encoder 36 is provided.

A linear guide means for moving the guide block 37b forward and backward while the cylinder 37 is used as an operation means at the rear end of the lifting table 32 configured as described above and the linear movement is performed for a certain period by the operation force of the piston rod 37a. This is provided. A positioning rod 37c is fixed to the guide block 37b to determine a fixed stroke of the piston rod 37a. The positioning rod 37c is a linear guide that moves forward and backward of the guide block 37b. A stopper 37d is provided on the rear side of the means to control the stroke of the positioning rod 37c.

On the other hand, the support bar 38 is formed in the front end of the positioning rod (37c) is formed so as to be close to the mold means 40 which will be described later, the support bar 38, the conveying bar (38) is a raw material (A) clamps and moves horizontally to the preparation and pressurizing means (30) while simultaneously moving the lifting table (32) vertically to be inserted into the inside of the raw material (A). Since the supporting bar 38 is a long length material, a tensioner 39 for preventing sag is hinged to the lifting table 32. In addition, since the tensioner 39 supports the supporting bar 38 or the raw material A fitted to the supporting bar 38 at all times, the center of gravity is set at the lower end of the hinge.

On the other hand, the stroke of the positioning rod 37c is enough to push the raw material A sandwiched by the supporting bar 38 into the extrusion holes 44a and 44b of the mold means 40 which will be described later.

Mold Means (40)

The mold means 40 is fixed to one side end of the drawing means 50 to be described later, as shown in Figure 6 attached. More specifically, the mold means 40 is located between the drawing means 50 and the preparation and pressure means 30, the raw material (A) is prepared and pressed means 30, that is, the supporting bar ( It is formed to have a higher position than the supporting bar 38 except for the operating state fitted to 38).

The mold means 40 includes a mold block 42 installed on one side of the drawing means 40.

The mold block 42 is formed with the same number of extrusion holes 44a and 44b as the number of raw materials in the set-up state, which is supplied and conveyed from the preparation / pressing means 30, and the size of the hole is set. It can be formed in various ways depending on the state.

However, it will be apparent that the extrusion holes 44a and 44b of the mold block 42 should have a narrower drawing means 50 side than the preparation / pressing means 30 side.

On the other hand, when the operation of completely fitting the raw material (A) to the supporting bar 38 in the preparation and pressing means 30 is completed, the means 30 is vertically lowered by means of vertically driven mold block ( The extruded holes 44a and 44b of 42 are moved to a horizontal position facing each other.

Drawing means (50)

As shown in FIGS. 7A and 7B, the drawing means 50 has a base body 51 fixed to a fixed bottom body and having a constant height, such as the preparation / pressure means 30, at the lower portion thereof. The linear guide 52 formed in a predetermined longitudinal direction is installed on the base body 51. In addition, the drive sprocket 53a and the driven sprocket 53b of large diameter are provided in the state which the link chain 53c hangs on both the left and right sides of the said linear guide 52. As shown in FIG.

On the side of the drive sprocket 53a, a drive motor 53 having a relatively high output is axially coupled for driving the chain.

On the other hand, the linear guide 52 is provided with a carriage 54 which is slidably coupled to the linear guide 52. The carriage 54 has a cylinder 55a and a mold block 42 when advancing to the piston rod 55b. A drawing clamper 55 for clamping to pull out the pipe A 'exiting the extrusion hole 44b of the () is installed in the form in which the inclined surfaces are symmetrical to each other on the outer peripheral surface thereof. At the front end of the drawing clamper 55, the extrusion hole 44a of the mold block 42 is brought into surface contact with the outer circumferential surface of the drawing clamping damper 55 inclined when the piston rod 55b is advanced, and the clamping member 55 is clamped. The clamp block 55c which catches the pipe A 'which escape | deviates to the inside is fixed. The clamp block 55c also serves to unclamp the pipe A 'held while the interview state of the drawing clamper 55 is released when the piston rod 55b moves backward.

In addition, the rear side of the carriage 54 is provided with a hook hook 56 for selectively hooking into the chain link 53c by rotating up and down about the hinge 56a by a separate piston rod of a cylinder type. have. The operation of the hook hook 56 is generated after the clamping operation of the drawing clamper 55, and serves to obtain power from the link chain 53c to draw out the raw material (A).

On the other hand, the return of the carriage 54 to the original state does not depend on the driving force mentioned above. The return to the original state takes place when the discharge operation of the fully drawn pipe A 'is completed, so that no large power is required.

As shown in FIG. 7A, a carriage return motor 57 having a relatively small output is provided on one side of the linear guide 52 in close proximity to the mold means 40. The carriage reel 57a, which is connected to the carriage 54 and the belt 58 by the drive shaft of the carriage return motor 57, is axially coupled, and the carriage 54 is returned to its original state by the winding reel.

The return operation of the carriage 54 is operated after the locking hook 56 is released from the link chain 53c.

Discharge means (60)

The discharge means 60 is installed on one side of the base body 51 of the drawing means 50 as shown in Figs. 7a, 7b and 8a, 8b. More specifically, it is installed to be lower than the height of the extrusion hole 44a, 44b of the mold block 42, it can be installed in plural or plural number depending on the length of the linear guide 52 of the drawing means (50).

The discharge means 60 enters into the drawing range of the raw material A or intersects with the longitudinal direction of the linear guide 52 around the rotating shaft 61 installed on the base body 51 or the linear guide 52. A discharge guider (62) engaging the bearing (63) with its shaft (61) to rotate at right angles in the longitudinal direction. A horizontal cylinder 64 is provided at the rear side of the discharge guide 62 in the same length direction as the linear guide 52, and at the end of the piston rod 64a of the cylinder 64, the rod 64a has a constant stroke. The discharge guider 62 is hinged 64b to rotate by 90 °.

On the other hand, the rotary shaft 61 is rotatably coupled to the discharge guider 62 is hinged (b) coupled to the fixing bracket 65 is fixed to the base body 51 of the drawing means 50, the fixed bracket ( The other cylinder 66 by the loading of the piston rod 64a is installed upright so that the discharge guider 62 including the rotating shaft 61 may be divided at a predetermined inclination angle.

The vertical cylinder 66 is a discharge cylinder for operating the piston rod 66a to discharge the pipe laterally when the pipe of the finished product having the drawing step is placed in the discharge guide 62 in the horizontal state.

Referring to the operation of the present invention configured as described above are as follows.

When power is first applied to the drive motor 13 in the supply means 10, the driven pulley 14a and the driven pulley 14b connected to the belt 15 are connected to the shaft while being rotated in a predetermined direction and driven. The power transmission shaft 16 press-fitted to the pulley 14b transmits power to the drive sprocket 12a, the driven sprocket 12b, and the link chain 11, which are a plurality of chain conveyors.

Accordingly, the transfer block 17 installed at equal intervals on the link chain 11 by the link chain 11 driven at a constant speed hangs the raw materials A sequentially supplied from the supply chute 18 one by one. The transport means 20 is loaded to the position to be operated.

When one or more of the raw materials (A) is finished loading to the transfer position point, power is supplied to the drive motor 24 by the transfer means 20 that recognizes the first power transfer of the drive motor 24. The drive pulley 24a, the driven pulley 24b, and the belt 24c, which are means, are driven together with the drive sprocket 22a, the driven sprocket 22b, the link chain 22c, and the like, which are secondary power transmission means. While the slider 23 connected to the link chain 22c is guided by the linear guide block 22 to move toward the supply means 10.

On the other hand, when the slider 23 reaches the position to clamp the raw material A while moving the position, the driving motor 24 is stopped and the piston rod 25a of the cylinder 25 installed perpendicular to the slider 23. Is extended downward, and the finger 27 is brought into near proximity with the raw material A. FIG. Subsequently, the piston rod 27a of the finger 27 acting symmetrically on both sides clamps the raw material A with the loading inwardly, and the slider 23 is guided to the linear guide block 22 to prepare. The pressing means 30 is moved.

The slider 23 of the conveying means 20 clamping the raw material A is moved vertically to the base body 31 of the preparatory and pressurizing means 30 in the process of being transferred to the preparatory and pressurizing means 30. The mold block 42 of the mold means 40 allows the installed lifting table 32 to move upward to allow the supporting bar 38 formed on the positioning rod 37c to be introduced into the material A to be conveyed. Move upward higher than).

In more detail, the operation of the power transmission means 34a, driven pulley 34b and the power transmission means while the power is applied to the drive motor 34 is fixed to the base body 31 in Figures 5a and 5b While interlocking the belt 34c, one side of the power screw rod 33a axially coupled with the driven pulley 34b is rotated. The rotation of the power screw rod (33a) is another screw rod engaged with this while interlocking one side of the screw rod (32a) and the other side of the power screw rod (33b) by the cross-screw shaft (35). The lifting table 32 is moved vertically by interlocking the 32a together. The vertical height of the lifting table 32 is set by controlling the driving of the driving motor 34 in the rotary encoder 36 which senses the rotation of the power screw rod 33b.

On the other hand, when the operation of the lifting table 32 is completed at a height at which the transferred raw material A can be fitted to the supporting bar 38, the raw material A clamped by the continuous movement of the slider 23 is removed. The supporting bar 38 is fully fitted, and then the lifting table 32 is returned to its original position while driving in the opposite direction to the above operation.

The return of the lifting table 32 refers to the movement of the raw material A inserted into the supporting bar 38 to the home position to be pushed into the extrusion hole 44a formed in the mold block 42.

On the other hand, the raw material (A) of the supporting bar 38 is a guide block which is fixed to the piston rod (37a) by applying a flow of fluid to the cylinder 37 of the initial state in which the piston rod (37a) is extended The 37a and the positioning rod 37c fixedly installed in the block 37b are interlocked together toward the mold means 40.

The raw material A sandwiched between the supporting bar 38 and the loading of the positioning rod 37c is press-fitted into the extrusion hole 44a of the mold block 42 and extruded to some extent into the extrusion hole 44b on the opposite side thereof. Until.

When the above operation is completed, the drawing clamper 55 on the carriage 54 in the drawing means 50 is extruded by the advance of the cylinder 55a and the piston rod 55b and the surface contact with the clamper block 55c. And one end of the pipe A 'to be completed, and at the same time, the locking hook 56 at the rear of the carriage 54 is caught by the link chain 53c for drawing while moving downward about the hinge 56a. .

Thereafter, the drive sprocket 53a and the driven sprocket 53b are interlocked by the drive motor 53 for driving the link chain 53c to horizontally move the carriage 54 on the linear guide 52 to the maximum drawing point. Move it.

On the other hand, when the carriage 54 drawing the raw material A passes through the discharge means 60 installed at equal intervals on the base body 51, the piston rod 64a is detected by a sensing means (not shown) for detecting this. The discharge guider 62 is rotated 90 degrees around the axis of rotation 61 to be folded into the range of the linear guide 52 by the horizontal cylinder 64 for loading.

On the other hand, when the drawing of the pipe is completed, the pipe A 'through the extrusion hole 44b of the mold block 42 is completely molded out, and at the same time, the drawing clamper 55 on the carriage 54 moves to the piston rod 55b. The clamped pipe A 'is unclamped while the interview state is released from the clamp block 55c by retreating.

The extruded pipe A 'is placed on the discharge guider 62, and the vertical cylinder 66 of the discharge means 60 is hinged 66b to the fixed bracket 65. While rotating the rotary shaft 61 downward, the discharge guider 62 pivotally coupled thereto is inclined laterally to discharge the pipe A '.

When the discharge of the pipe A 'is completed, the discharge guider 62 of the discharge means 60 is driven in the opposite direction to the above operation to return to the original position, while the carriage 54 guided by the linear guide 52 has its rear side. The jam is released from the link chain 53c by the upward movement of the locking hook 56 configured at the same time, and at the same time, only the carriage 54 is pulled back by the belt 58 driving of the carriage return motor 57 and returned to its original position. One cycle of the device is closed.

The present invention described above is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those who have

When the present invention is applied as described above, since the raw material is extruded and drawn out using the LM guide having the electric motor having a constant rotational force as a driving means, the drawing process is compared with the conventional drawing apparatus using the pneumatic cylinder as the drawing driving means. Not only is the surface improved significantly, but it is possible to expect a very desirable effect of reducing the cost of equipment because it does not require a variety of auxiliary equipment for the pneumatic working fluid.

Claims (3)

Means 10 for supplying the raw material A, Means 20 for conveying the supplied raw material A, Means 30 for preparing and pressurizing the conveyed raw material A to enter the drawing stage , Means for extruding the prepared raw material (A) by pressing means 40, means 50 for drawing the workpiece A 'extruded from the mold means 40 in the extrusion direction, and drawn processing It consists of means (60) for discharging the material (A ') to the outside, and a series of steps are operated automatically from the supplying step of the raw material (A) to discharging the drawn material (A') In the automatic drawing system, The drawing means 50 includes a linear guide 52 for guiding linear movement; A drive unit provided at both sides of the linear guide 52 and driving the link chain 53c by an electric force; A drawing portion which is slidably engaged on the linear guide 52 and draws out the material extruded from the mold means 40 by selective engagement with the link chain 53c; A drawing apparatus of a fully automatic drawing system including a return drive unit for returning the drawing portion moved by the link chain (53c) to its original position. According to claim 1, wherein the draw portion is a carriage 54 sliding linearly coupled on the linear guide 52 and the piston rod 55b is installed on the carriage 54 by the flow of fluid Clamping or processing the workpiece (A ') is provided on the cylinder (55a) to move forward or backward, one end of the piston rod (55b) and one side of the carriage 54 opposite to each other and extruded from the mold means (40) The hook hook unclamping 55 and clamp block 55c and the hook chain 53c installed on the other side of the carriage 54 opposite thereto and selectively engaged with the link chain 53c driven in the drawing step are interlocked. Drawing device of the fully automatic drawing system, characterized in that the configuration (56). The automatic hook according to claim 1 or 2, characterized in that the latching hook (56) is released from the link chain (53c) to return the carriage (54), which has been drawn out, to its original position by a return driver. Drawing device of drawing system.