JPH0811047A - Wire saw device and work pulling out method - Google Patents

Abstract

PURPOSE:To prevent a wire from being tangled in a cutting position of work when the work is pulled out and to prevent the work from following so as to improve workability and productivity. CONSTITUTION:A wire 8 is wound on plural working head rollers 5, 6, 7 at the predetermined pitch, and one end side of the wire 8 is wound on one wire reel 10, while the other end side of the wire 8 is wound on the other wire reel 11, the wire 8 is run at a high speed while the predetermined tension is applied to the wire 8, so that work W is cut in a wire saw device. After the work W is cut by means of the wire 8, the wire 8 is prevented from floating over the whole area of the line of the wire 8 in the vicinity of a wire entrance point of the work W. A pair of restricting members 49L, 49R matched with the vicinity of the wire 8 entrance point are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire saw device for running a wire at a high speed and pressing a work (material to be cut) against the wire to cut the work, and a method of drawing the work after cutting. .

[0002]

2. Description of the Related Art A wire is wound around a plurality of groove rollers (working head rollers) at a predetermined pitch so that one end of the wire is connected to one wire reel and the other end of the wire is connected to the other wire reel. A wire saw device that winds and cuts a work by running at high speed while applying a predetermined tension to the wire is known as disclosed in JP-A-63-260757 and JP-A-1-177958. .

In this conventional wire saw device, as shown in FIG. 7, a plurality of processing head rollers 84, 85, 8 are provided.
The wire 81 is wound around 6 at a predetermined pitch, and the wire 81 travels in a straight line direction by the rotational driving of the processing head roller 86, and a plurality of parallel cuts are formed in the work W in the course of the traveling motion. During the progress of the cutting, the work feed motor (not shown) drives the work feed unit 82 to move downward little by little and press the work W against the wire 81 in the traveling state with a predetermined force. Disconnect. Then, the work W is cut as described above, the wire 81 reaches the fixing carbon material 83 above the work W, and the cutting is completed. Then, the work feed unit 82 is moved upward in the direction of the arrow to pull out the work W from the wire 81.

[0004]

However, in the above-described conventional wire saw device, when the work W is pulled out, the wire 81 is caught at the cutting portion W1 of the work W and is lifted up along with the work W. In some cases, the work W could not be smoothly pulled out, and it also caused a wire jump. Therefore, there is a problem in that work such as catching and checking, repairing, and wire jump correction are required, which lowers workability and productivity.

The present invention solves the above-mentioned problems. A first object of the present invention is to provide a wire lifting control means so that the wire is caught at a cut portion of the work when the work is pulled out. It is an object of the present invention to provide a wire saw device that can prevent wire entrainment and can improve workability and productivity without any problem.

A second object of the present invention is to provide a wire saw device in which the regulating means is also used as a slurry supply means so that the structure can be simplified without the need to separately provide a slurry supply device. It is in.

A third object of the present invention is to prevent the wire from being caught in the cutting portion of the work when the work is pulled out and prevent the wire from being entrained, thereby improving workability and productivity. It is to provide a withdrawal method.

[0008]

In order to achieve the above-mentioned first object, a wire saw device according to the present invention winds a wire around a plurality of processing head rollers at a predetermined pitch, and one end of this wire is wound. One side of the wire reel, the other end side of the wire is wound around the other wire reel, respectively, in a wire saw device for traveling at high speed while applying a predetermined tension to the wire to cut the work, When the work is pulled out after the work is cut, a regulation means is provided for regulating the lifting of the wire over the entire wire row at a position near the wire entry / exit point of the work.

It is preferable that the restricting means has a pair of restricting members corresponding to positions near the wire entry / exit points of the work.

Further, in order to achieve the above-mentioned second object, the wire saw device according to the present invention, when the work is pulled out after the work is cut by the wire, at the position near the wire entry / exit point with respect to the work over the entire wire row. It is characterized in that it comprises a regulating means for regulating the lifting of the wire, and the regulating means has a slurry supplying means which moves to a slurry supplying position when the work is cut by the wire and supplies the slurry to the wire.

Further, the restricting means has a pair of restricting members corresponding to positions near the wire entry / exit points with respect to the work, and a slurry inlet is provided in the restricting members,
It is preferable that a slurry outlet is provided on the side of the regulating member facing the wire, and a wire contact member having an opening communicating with the slurry outlet is provided on the side of the regulating member facing the wire. Further, it is preferable that the restricting member is movable to a restricting position for restricting lifting of the wire and a retracted position. Further, it is preferable that the restriction member is movable in the traveling direction of the wire. Also,
It is preferable that the restricting means includes a driving means that moves the restricting member so as to always come to a position in the vicinity of the wire entry / exit point of the work as the work moves according to the outer shape of the work.

In order to achieve the above-mentioned third object, in the work drawing method according to the present invention, when the work is drawn, the wire is lifted by pressing the wire at a position near the wire entry / exit point of the work by the regulating means. The feature is that it regulates

It is preferable that the restricting means is a pair of restricting members. Further, it is preferable that the regulation member is moved so as to always come to a position near the wire entry / exit point of the work as the work moves in accordance with the outer shape of the work.

[0014]

In the wire saw device according to the present invention, when the work is pulled out, the wire is restrained at the position near the wire entry / exit point of the work by the pair of restricting members constituting the restricting means so that the wire is prevented from rising. Therefore, the wire does not get caught at the cutting point of the work and is not lifted up with the work, and the work can be smoothly pulled out, and the work such as checking for hooks, repairing, and correcting wire jumps is unnecessary. Therefore, workability and productivity can be improved.

Further, the regulating member not only restrains the wire when pulling out the work, but also acts as a slurry supplying means when cutting the work, and the regulating member is moved by the driving means in accordance with the movement of the work, The work is always moved to a position near the wire entry / exit point, and wire holding and slurry supply can be efficiently performed at appropriate positions.

In the wire drawing method according to the present invention, when the work is drawn out, the wire lifting is restricted by pressing the wire at a position near the wire entry / exit point of the work by the pair of restricting members constituting the restricting means. Therefore, the wire does not get caught at the cutting point of the work and is not lifted up with the work, and the work can be smoothly pulled out, and there is no need to perform work such as checking for hooking, repairing, and correcting wire jumps. Therefore, workability and productivity can be improved.

[0017]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view of the wire saw device according to the present invention with a part thereof omitted, and FIG. 2 (1) is a plan view with a part of the wire floating restricting device as a restricting means in the wire saw device omitted. (2) is a sectional view taken along the line AA of (1), FIG. 3 is a sectional view taken along the line BB of (1) of FIG. 2, and (1) of FIG. 4 is (1) of FIG. 4 is a cross-sectional view of the restriction member of the restriction device taken along line C-C, and FIG. 4B is a cross-sectional view taken along line D-D of FIG.

The wire saw device according to the present invention comprises a machining head portion 1, a wire traveling portion 2, a wire traveling driving portion 3,
The wire lifting restricting device 20 as a restricting means is provided. In the processing head unit 1, three groove rollers, namely, processing head rollers 5, 6, and 7 are arranged on a machine base (not shown) so as to be located at respective vertices of an inverted triangle. A wire 8 is wound around 6 and 7 at a predetermined pitch p, and a wire portion between the upper processing head rollers 5 and 6 serves as a work cutting portion 9. The wire traveling drive unit 3 includes a first rotary motor 13 and a second rotary motor 14
And a braking mechanism (not shown) which is a braking means.

The wire traveling section 2 is provided with first and second wire reels 10 and 11, and the rotation axis of the first wire reel 10 is the first rotation of the wire traveling drive section 3. The rotation shaft of the second wire reel 11 is connected to the output shaft 13a of the motor 13 and the output shaft 14 of the second rotation motor 14 is rotated.
are respectively connected to a. The one end side of the wire 8 is wound around the first wire reel 10, and the other end side of the wire 8 is wound around the second wire reel 11.

The first and second wire reels 10, 11 are driven by a traverse motor (not shown) on the wire winding side and the wire sending side of the first and second wire reels 10, 11, respectively.
A traverse mechanism (not shown) that reciprocates in the axial direction of 11 to wind the wires 8 in a line and a dancer roller mechanism (not shown) are provided. The wire 8 is guided by a guide roller (not shown) on the way. Further, the processing head roller 7 on the drive side of the processing head unit 1
Is connected to the output shaft 15a of the drive motor 15.

A work supporting body 17 which is moved up and down by a work feeding motor (not shown) is arranged above the work cutting section 9, and a work mounting surface of the work supporting body 17 is mounted on the work supporting surface. The work W bonded to the carbon material 16 that is a holding member is held. This work W is a member to be cut of a high hardness brittle material, for example, a semiconductor material, and its shape is, for example, a cylindrical body.

The wire lifting restricting device 20 has a main body 21 as shown in FIGS.
1 has guide members 22 on its left and right sides in FIG. 2 (1), and these guide members 22 can be slid vertically in FIG. 3 on a guide rail 23 provided upright on the machine base. It is held by an elevating cylinder 61 which is a moving means described later. In FIG. 2 (1), the main body 21 has supporting portions 25 and 26 on the left and right sides thereof, and a central supporting portion 27 at the central portion thereof.
7, a connecting shaft 29 is rotatably provided via a bearing member 28, and in FIG. 3, a central support portion 27 holds guide bars 30 and 31 vertically.

In FIG. 2 (1), the left end of the connecting shaft 29 is connected to the right end of a left ball screw shaft 33 via a joint 32. The ball screw shaft 3
The left end portion of 3 is connected to the output shaft side of a rotary drive motor 35 provided on the left support portion 25. In addition, the connecting shaft 29
The right end portion of the right ball screw shaft 37 is connected to the right end portion of the ball screw shaft 37 via a joint 36. The right end portion of the ball screw shaft 37 is mounted on the right support portion 26.
It is supported by 8. Left and right ball screw shafts 33, 3
7 has feed screw portions 33a and 37a whose leads are opposite to each other. Further, in FIG. 3, the upper and lower guide bars 3 are provided between the left and right support portions 25 and 26 of the apparatus main body 21.
0, 31 are attached to these guide bars 30, 31
Penetrates the central support portion 27.

In FIG. 2A, a left carrier 41 is provided on the left part of the guide bars 30 and 31, and a right carrier 42 is provided on the right part thereof so as to be movable in the left-right direction. That is, in FIG. 3, a left carrier 41 is provided with a nut member 43 and guide bushes 44 and 45 vertically arranged with the nut member 43 interposed therebetween. These guide bushes 44 and 45 are provided on the guide bar 30. Three
1 is fitted, and the nut member 43 is screwed onto the feed screw portion 33a of the left ball screw shaft 33. The right carrier 42 has the same structure as the left carrier 41, the guide bushes 47 and 48 are fitted to the guide bars 30 and 31, and the nut member 46 is arranged on the right ball screw shaft 37.
Is screwed into the feed screw portion 37a. The left and right ball screw shafts 33 and 37, the rotary drive motor 35, and the nut members 43 and 46 constitute a drive means.

In FIG. 2A, the left carrier 41 is provided with a left regulating member 49L and the left regulating member 4
The swinging mechanism 50L, which is a swinging means of 9L, is used for the right carrier 4
2 includes a right regulation member 49R and a right regulation member 49R.
A rocking operation mechanism 50R, which is a rocking means for R, is provided.

The left rocking mechanism 50L is provided with a pinion 51. The pinion 51 is fixed to the left end of a rotary shaft 47 that penetrates the left carrier 41 in the left and right directions. Is provided with a rack operating cylinder 52, and a rack member 53 is attached to a piston rod 52a of the rack operating cylinder 52, and the rack member 53 meshes with the pinion 51. A regulating member gripping member 54L is fixed to the right end of the rotary shaft 47, and the regulating member gripping member 54L grips the base 49a of the left regulating member 49L.

The left regulating member 49L is a double cylinder extending over the entire wire row of the work cutting section 9 as shown in FIG. 4, and has inner and outer cylinders 55 and 56, and slurry supply means. Is formed. The regulating member 49L is provided with a slurry inlet 57 which is open to the side at the base 49a of the inner cylindrical body 55, and passes through the inside of the rotary shaft 47 as shown in FIG. A slurry supply conduit 73 is connected to the tip. A slit-shaped opening 58 is formed in the upper part of the inner cylinder 55 along the axial direction of the inner cylinder 55, and in the lower part of the outer cylinder 56 along the axial direction of the outer cylinder 56. A slit-shaped slurry outlet 59 is formed. Further, a wire contact member 48 is detachably provided at a lower portion of the outer cylindrical body 56 at left and right positions sandwiching the outflow port 59 so as to form an opening 48a communicating with the outflow port 59. This is because even if the wire contact member 48 is abraded or scraped by the wire 8, the outer cylindrical body 56 is not damaged, so that only the wire contact member 48 is replaced, and the restricting members 49L and 49L.
The durability of R is improved.

The right rocking mechanism 50R has the same structure as the left rocking mechanism 50L, the right restricting member 49R has the same structure as the left restricting member 49L, and the rotating shaft of the right rocking mechanism 50R is the same. A regulation member gripping member 54R is fixed to the left end portion of 51, and the regulation member gripping member 54R is located on the right regulation member 49.
It holds the R base 49a.

Further, a ceiling frame 60 is horizontally installed above the guide rail 23.
An elevating cylinder 61 is attached to the elevating cylinder 61, and a piston rod 62 of the elevating cylinder 61 is attached to the apparatus main body 21.
Is connected to the upper surface portion of the central support portion 27.

The left and right restricting members 49L, 49R of the wire floating restricting device 20 are arranged above the machining head 1 and to the left and right of the work support 17. A liquid receiving tank 63 for receiving a slurry (cutting liquid) is arranged below the processing head 1.
Then, from the liquid receiving tank 63 to the left and right regulating members 49
A slurry supply circuit 64 is arranged between L and 49R.

The supply circuit 64 includes a slurry supply pump 6
A 6-position, 3-position electromagnetic switching valve 67, and a slurry tank 70 are provided. The discharge side of the slurry supply pump 66 passes through the pipe line 72 and the pipe line 73 through the three-position electromagnetic switching valve 67.
Alternatively, it is selectively connected to 74. And this conduit 7
3 and 74 are inlets 5 of the regulating members 49L and 49R, respectively.
It is connected to 7. Further, the liquid receiving tank 63 is connected to the pipe 7
It is connected to the tank 70 via 5.

Next, the operation of the wire saw device configured as described above will be described. When cutting a work, first, second
The rotary motors 13 and 14 and the drive motor 15 are driven. The first wire reel 10 feeds the wire 8 by the rotation drive of the first rotation motor 13, and the second wire reel 11 winds the wire 8 by the rotation drive of the second rotation motor 14. Further, due to the rotational drive of the drive motor 15, the processing head roller 7 fixed to the output shaft 15a of the drive motor 15 rotates in the direction of the solid line arrow. Therefore, the wire 8 forming the wire cutting portion 9 wound around the processing head rollers 5 and 6 runs in the left direction of the solid arrow.

The rotation directions of the first and second rotary motors 13 and 14 are positively rotated at a constant time T1 and the subsequent time T.
It reverses at 2, rotates in the reverse direction, and repeats this.

In this way, the wire 8 reciprocates in the linear direction, and in the course of the reciprocating motion, a plurality of parallel cuts are formed in the work W. During the progress of the cutting, the work supporting motor 17 is driven to gradually lower the work supporting body 17 to press the work W against the wire 8 in the traveling state with a predetermined force.

In the wire floating restricting device 20, the left and right restricting members 49L and 49R are set to the positions shown in FIG.
Standing upright as indicated by the virtual line c. Then, at the time of cutting, the swinging mechanism 5 for the left and right carriers 41, 42
The rack operating cylinders 52 of 0L and 50R are extended to rotate the pinion 51 by the rack member 53, and the left and right restricting members 49L and 49R are rotated through the rotation shaft 47, as shown by a virtual line a in FIG. In the horizontal state, the left and right regulating members 49L and 49R are positioned above the work cutting portion of the wire 8, that is, at the slurry supply position. At this time, the pair of regulating members 49L and 49R are moved by the driving means so as to correspond to above the position near the wire entry / exit point of the work, as shown in (1) of FIG.

Then, the pump 66 is operated, and the slurry in the tank 70 is transferred through the pipe line 72 to the three-position electromagnetic switching valve 6
After passing through 7, it is selectively switched to the pipeline 74 or 73 and flows into the slurry inlet 57 of the left and right regulating members 49R or 49L. Then, this slurry is ejected from inside the inner cylindrical body 55 through the slit-shaped opening 58 between the inner cylindrical body 55 and the outer cylindrical body 56, and flows out from the slit-shaped outlet 59 of the outer cylindrical body 56. The slurry is supplied to the work cutting portion of the wire 8.

Further, the first and second rotary motors 13 and 14
The direction of rotation of the wire 8 is forwardly rotated at a constant time T1, then reversed at time T2 and rotated in the reverse direction, and the wire 8 is gradually wound in one direction while repeating this reciprocating motion. The three-position electromagnetic switching valve 67 is switched so as to supply the slurry to the regulating member on the upstream side of the wire 8 with respect to the workpiece W in accordance with the traveling direction of the wire 8. Then, this slurry is ejected from inside the inner cylindrical body 55 of the regulating member 49R or 49L through the slit-shaped opening 58 between the inner cylindrical body 55 and the outer cylindrical body 56, and the outer cylindrical body 56 is slit-shaped. The slurry flows out from the outflow port 59 and is supplied to the work cutting portion of the wire 8. At this time, the slurry may be supplied from the regulating member on the side where the wire 8 cuts into the work. Along with the work cutting movement, a pair of regulating members 4
9L and 49R are always moved with respect to the work W so as to correspond to the position near the entry / exit point of the wire 8 with respect to the work W. Therefore, the slurry is efficiently supplied.

The work W is cut as described above,
As shown in (2) of FIG. 5, when the wire 8 completely cuts the work W and cuts up to the upper fixing carbon material 16, the three-position electromagnetic switching valve 67 switches in this state, and the slurry is supplied. Is completely stopped.

Next, the work W is extracted. The elevating cylinder 61 is extended to operate the left and right regulating members 49.
L and 49R descend in the horizontal state to the restricting position B. At this restriction position B, the wire contact members 48 of the restriction members 49L and 49R are in contact or non-contact with the work W at positions near the wire entry / exit points at the left and right positions of the work cutting portion 9 of the wire 8 sandwiching the work W. Corresponding. In this state, the work feed motor is reversely driven, the work support 17 starts to move upward, and the work W is pulled out. In this case, when the wire 8 tries to be lifted, the wire contact member 48 of the restriction members 49L and 49R.
The wire 8 is prevented from coming into contact with or being pressed by the wire 8, and the wire 8 is prevented from accompanying the movement of the work W. Therefore, the wire 8 does not get caught in the cut portion of the work W,
The work W is pulled out.

Further, since the work W has a circular cross section, for example, if the work W is pulled upward and the horizontal positions of the left and right restricting members 49L and 49R are not changed, these work W will not be changed. Regulation member 49L, 49
There is a case where the work W interferes with R, and it is preferable for pulling out that the restriction members 49L and 49R hold the wire 8 at a position near the entry / exit point of the work W.

Therefore, the rotary drive motor 35 is driven to rotate the left and right ball screw shafts 33 and 37 to move the left and right support members 41 and 42 to the left and right, so that the left and right regulating members 49L and 49R are mutually moved. Moves in the direction of contact and separation at the same time. The movement of the left and right regulating members 49L and 49R is as shown in FIG.
As shown in (1), (2), (3) and (4), control is performed in synchronization with the pulling out (raising) of the work W, and along the left and right peripheral surfaces of the work W with a certain distance. To be done.

According to the above-described embodiment, after the work W is cut by the wire 8, the left and right regulating members 49L, 49R near the point where the wire 8 enters and exits the work W on the pulling side of the work W. By pressing the floating of the wire 8, the wire W can be smoothly pulled out without the wire 8 being lifted along with the work W, and work such as catching and reworking can be performed. It becomes unnecessary, wire jump is prevented, and workability and productivity can be improved.

In the above embodiment, the regulating member 49L,
49R is formed in a cylindrical shape so as to include the slurry supply means, but if it is not used also as the slurry supply means, a rectangular piece or a plate shape can be used.

[0044]

As described above, according to the present invention, when the work is pulled out, the wire is lifted by pressing the wire at a position near the wire entry / exit point of the work by the pair of restricting members constituting the restricting means. Since the wire is regulated, the wire will not be caught at the cutting point of the work and will not be lifted up with the work, and the work can be pulled out smoothly, and the work such as catching and reworking, wire jump correction, etc. Work becomes unnecessary, and workability and productivity can be improved.

Further, the regulating member not only holds down the wire when pulling out the work, but also acts as a slurry supplying means when cutting the work, and it is not necessary to provide a separate slurry supplying device, which simplifies the structure and further drives the drive. By the means, the regulating member is always moved to a position near the wire entry / exit point of the work in accordance with the movement of the work, so that the wire pressing and the slurry supply can be efficiently performed at an appropriate position.

Further, in the work drawing method according to the present invention, when the work is drawn, the wire is pushed up at a position near the wire entry / exit point of the work by the pair of restricting members constituting the restricting means to lift the wire. By regulating, since the lifting of the wire is regulated at the time of pulling out the work, the wire does not catch on the cutting point of the work and is not lifted up with the work, and the work can be smoothly pulled out. There is no need to perform work such as checking for hooks, repairing them, and correcting wire jumps, thus improving workability and productivity.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a wire saw device according to the present invention with a part thereof omitted.

FIG. 2 (1) is a plan view in which a part of the wire floating restricting device in the wire saw device is omitted. (2) is a sectional view taken along the line AA of (1).

3 is a cross-sectional view taken along the line BB of FIG.

4 (1) is a cross-sectional view of a restricting member of the wire floating restricting device taken along line CC of FIG. 2 (1). (2) is a cross-sectional view taken along the line D-D in (1) of FIG. 4.

FIG. 5 (1) is an explanatory view of a state before cutting the work. (2) is an explanatory view of a state after cutting the work.

6 (1), (2), (3), and (4) are explanatory views of the relationship between the drawing of the work and the regulating member.

FIG. 7 is an explanatory diagram of a work drawing state after cutting the work in the conventional wire saw device.

[Explanation of symbols]

8 wire 20 wire lifting regulation device 49L, 49R regulation member W work 5, 6, 7 processing head roller 10, 11 wire reel 55, 56 forming inner part of slurry supplying means 57, 59 forming outer part of slurry supplying means Slurry inlet and outlet 48 wire contact member 48a openings 33, 37 ball screw shaft 35 constituting drive means rotary drive motors 43, 46 constituting drive means nut member constituting drive means

Claims (10)

[Claims] 1. A wire is wound around a plurality of processing head rollers at a predetermined pitch, and one end side of the wire is wound around one wire reel, and the other end side of the wire is wound around the other wire reel. In a wire saw device that cuts a work by traveling at high speed while applying a predetermined tension to the wire, when the work is pulled out after cutting the work by the wire, the wire floats over the entire wire row at a position near the wire entry / exit point of the work. A wire saw device, which is provided with a regulation means for regulating the movement. 2. The wire saw device according to claim 1, wherein the restricting means includes a pair of restricting members corresponding to positions near a wire entry / exit point with respect to the work. 3. A wire is wound around a plurality of processing head rollers at a predetermined pitch, and one end side of the wire is wound around one wire reel, and the other end side of the wire is wound around the other wire reel. In a wire saw device that cuts a work by traveling at high speed while applying a predetermined tension to the wire, when the work is pulled out after cutting the work by the wire, the wire floats over the entire wire row at a position near the wire entry / exit point of the work. The wire saw device is characterized in that the wire saw device has a regulating means for regulating the wire, and the regulating means has a slurry supplying means which moves to a slurry supplying position when the work is cut by the wire and supplies the slurry to the wire. 4. The regulating means has a pair of regulating members corresponding to positions near the entry / exit point of the wire with respect to the work, and a slurry inlet is provided in the regulating member, and the regulating member opposes the wire. 4. The wire saw device according to claim 3, wherein a slurry outlet is provided on a side, and a wire contact member having an opening communicating with the slurry outlet is provided on a side of the regulating member facing the wire. 5. The restricting member is movable to a restricting position for restricting lifting of the wire and a retracted position.
Alternatively, the wire saw device according to claim 4. 6. The wire saw device according to claim 2, 4, or 5, wherein the restricting member is movable in a wire traveling direction. 7. The regulating means has a driving means for moving the regulating member so as to always come to a position near the wire entry / exit point of the workpiece as the workpiece moves in accordance with the outer shape of the workpiece. The wire saw device according to claim 5 or 6. 8. A method of pulling out a work, wherein when pulling out the work, the wire is restrained by a restraining means at a position near the wire entry / exit point of the work to restrain the wire from rising. 9. The work extracting method according to claim 8, wherein the regulating means is a pair of regulating members. 10. The work extracting method according to claim 9, wherein the restricting member is moved so as to always come to a position near the wire entry / exit point of the work as the work moves according to the outer shape of the work.