KR100625093B1 - Jaw spacing adjustor for steel cutter - Google Patents

Abstract

The present invention provides a jaw gap control device of the steel cutting machine. The clearance adjustment device of the present invention in the jaw gap adjustment device of the steel cutting machine having a main pin for rotatably connecting at least one of the male jaw and female jaw, and the male jaw and the female jaw coupled to each other, respectively between the male jaw and female jaw Both first and second bosses provided and having male threads formed in the axial direction of the main pins; Each of the first and second bosses is screwed into the male threaded portions, respectively, and has both first and second clearance adjusting spacers for adjusting the clearance between the male and female jaws while screwing along each of the first and second bosses. According to the present invention, it is possible to finely control the clearance between the gap between the male and female jaws and the gap between the cutting edges to improve the cutting performance, to prevent the steel from being caught between the male and female jaws, side wear If the clearance increases, the clearance can be easily compensated without disassembly, thereby improving operation efficiency.

Description

Jaw play control device of steel cutting machine {JAW SPACING ADJUSTOR FOR STEEL CUTTER}

1 is a perspective view showing a general steel cutting machine,

2 is an exploded perspective view showing a part of a typical steel cutting machine,

Figure 3 is an exploded perspective view showing the female, male jaw of the steel cutting machine according to the prior art,

4 is a front view of a state in which the iron bites on the steel cutting machine when cutting the steel,

5 is a cross-sectional view of portion A of FIG. 4;

6 is a cross-sectional view taken along the line B-B of FIG.

7 is a state just before cutting the steel by closing the jaw in the state of FIG.

8 is an exploded perspective view of a jaw play control device according to a first embodiment of the present invention,

9 is a cross-sectional view showing the assembled state of FIG.

10 is a cross-sectional view showing a modification of the jaw gap adjusting device according to the first embodiment of the present invention;

11 is a cross-sectional view showing a modification of the separation preventing means constituting the jaw gap adjusting device according to the first embodiment of the present invention;

12 is a cross-sectional view showing another modified example of the jaw gap adjusting device according to the first embodiment of the present invention;

13 is a cross-sectional view showing the configuration of a jaw gap adjustment device according to a second embodiment of the present invention;

14 is a cross-sectional view showing a modification of the separation preventing means constituting the jaw gap adjusting device according to the second embodiment of the present invention.

♣ Explanation of symbols for main part of drawing ♣

10: male 12: pinhole

14: cutting blade 20: arm

22: receiving groove 24: pin hole

24a: first protrusion 24b: second protrusion

24c: first jamming groove 24d: second jamming groove

25: cutting blade 30: main pin

40: first boss 42: male part

50: second boss 52: male part

60: first clearance control spacer 62: Amsanabu

64: locking groove 66: protrusion

70: second clearance control spacer 72: female thread

74: locking groove 76: protrusion

80: turning 82: stopper

82a: fixing groove 84: pocket

86: bolt 90: bush

92: bush 100: first protrusion

102: second projection 104: locking groove

106: Hanging groove

The present invention relates to a jaw gap adjusting device of a steel cutting machine, and more particularly, to easily and finely adjust the axial clearance between the male jaw and female jaw to improve the cutting performance and the cutting material such as steel between male and female jaws It relates to a jaw gap control device of a steel cutting machine that can be prevented from getting caught in the.

The steel cutting machine is one of the attachments used to be selectively mounted on the arm of an excavator. It is used to cut the scrap metal in steel companies or steel mills, or to cut and dismantle the steel when dismantling steel structures such as factories. .

As shown in FIGS. 1 to 4, the steel cutting machine includes a male jaw 110 and an female jaw 120 that hold a plurality of cutting blades 111 and 121 for cutting steel W, respectively. One end of the male jaw 110 and the female jaw 120 is connected to the main body 131 by the main pin 131 is installed so as to rotate around the main pin 131.

In addition, the male jaw 110 and the female jaw 120 is to be opened and closed by rotating the predetermined angle by the hydraulic cylinder (132,133), one side of the hydraulic cylinder (132,133) the male jaw (110) by the cylinder pin (134,135) And it is connected to the female jaw 120, the cylinder rod side is connected to the main body 130 by the rod pins (136, 137), the upper portion of the main body 130 is provided with a mounting pin 138 for mounting the steel cutting machine to the excavator It is.

As shown in FIGS. 2 and 3, the male jaw 110 and the female jaw 120 are assembled to allow relative rotational movement with respect to the main pin 131, so that each pin of the male jaw 110 and the female jaw 120 is basically formed. The holes 112 and 122 and the main pin 131 are assembled to have a small gap therebetween, and the relative rotational movement must be possible on the two contact side surfaces (the side where the shim 113 is assembled) between the male jaw 110 and the female jaw 120. Therefore, it is assembled to form a certain gap.

As shown in FIG. 7, the steel cutting machine generates a force (arrow direction) that pushes each other on the male jaw 110 and the female jaw 120 by the reaction of the cutting force that cuts the steel W at the moment of cutting the steel W. FIG. The male jaw 110 is assembled between the female jaw 120 by the force pushing the male jaw 110 and the female jaw 120 is pushed or twisted axially in the female jaw (120). Therefore, the cutting edge 111 of the male jaw (110) of the female jaw (110) by the gap between the main pin (131) cylindrical surface and the side surface of the shim (113) assembly surface between the male jaw (110) and the female jaw (120). It is twisted away from the cutting blade 121. That is, the cutting blades 111 and 121 of both the male jaw 110 and the female jaw 120 do not maintain parallel to each other.

As such, when the cutting blades 111 and 121 of the male jaw 110 and the female jaw 120 are opened 0.5 mm near the main pin 131, the ends of the cutting pins 111 and 121 are farthest from the main pin 131. In the case of 2 to 3 mm will open.

In order to solve this problem, the gap should be minimized, and the gap between the cylindrical surface of the main pin 131 should be able to smoothly rotate so that there is a limit to minimizing the gap.

Therefore, in the related art, as shown in FIGS. 3 and 5, a plurality of shims 113 are installed in the side gap between the male jaw 110 and the female jaw 120 to minimize the gap. However, the shim 113 is difficult to assemble into a very small gap. That is, the thick shim 113 is easy to fit, but it is difficult to finely fit the gap, the thin shim 113 can minimize the gap, but the assembly is very difficult. In general, the side gap that can be fitted using the shim 113 is about 0.5 mm minimum.

In addition, long-term use causes wear on the side surface between the jaw 110 and the female jaw 120, so that the clearance in the axial direction in which the jaw 110 can move becomes greater and the gap of the cutting blades 111 and 121 becomes more severe. As such, if the gap between the male jaw 110 and the cutting blades 111 and 121 of the female jaw 120 is not maintained, the cutting performance is lowered and the thin steel W is sandwiched between the cutting blades 111 and 121.

Typically, the cutting machine is configured to retract both jaws 110 and 120 when operated in the extending direction in which the axial force of the hydraulic cylinders 132 and 133 is exerted so as to be greater than the force opening force to retract both jaws 110 and 120. Therefore, when the steel (W) is pinched, it is passed by a large force, the force to open both jaws (110, 120) is weak, so only the force of the hydraulic cylinder (132,133) can not open both jaws (110, 120), hydraulic jack or It is spread using a hammer, etc., and the cutting operation is stopped during this working time, thereby reducing the operating efficiency.

On the other hand, when the cutter is used for a long time and wear is advanced and the clearance of the side gap is increased, the shim 113 can be further assembled to minimize the clearance, but for this purpose, the cutter must be disassembled again in the state of FIG. 3. Discomfort followed, there was a problem that it is very difficult to keep the play fine by using a thin shim (113).

The present invention is to solve the conventional problems as described above, the object is to make it possible to finely control the clearance between the gap between the male and female jaws and the gap between the cutting edge to improve the cutting performance, the steel material It is to provide a jaw gap control device of a steel cutter to prevent the jam between the jaws.

In addition, another object of the present invention is that when the side of the male and female jaws wear due to long-term use to increase the clearance of the side gap, it is possible to simply fine-tune the clearance without disassembling the steel cutter, the cutting operation due to the clearance correction It is to provide a jaw gap control device of a steel cutter that can improve the operation efficiency without stopping for a long time.

In order to achieve the above object, the present invention, in the jaw gap adjustment device of the steel cutting machine having a male jaw and female jaw coupled to each other, and a main pin for rotatably connecting at least one of the male jaw and female jaw, First and second bosses respectively provided between the male jaws and the female jaws, each having a male screw portion formed in an axial direction of the main pin; Both first and second clearance adjusting spacers are respectively screwed to the male threaded portions of the first and second bosses and adjust the play between the male and female jaws while screwing along each of the first and second bosses. It is characterized by including.

Hereinafter, the jaw clearance adjusting device of the steel cutting machine according to the present invention will be described in detail by the accompanying drawings.

8 and 9 is a view showing the jaw gap adjustment device of the steel cutting machine according to the first embodiment of the present invention. First, before looking at the jaw gap regulator, the steel cutter is briefly described as follows.

The steel cutting machine includes a male jaw 10 and an female jaw 20. The male jaw 10 is provided with the upper pin hole 12, The cutting edge 14 is fixedly installed in one side surface.

The arm jaw 20 has a central accommodation groove 22 for accommodating the male jaw 10. Pinholes 24 that are aligned with the pinholes 12 of the male jaws 10 are formed above the receiving grooves 22. The main pin 30 is coupled to the pin holes 12 and 24 aligned with each other. The cutting blade 25 is fixed to one inner side surface 22a of the receiving groove portion 22 of the female jaw 20. The cutting blade 25 corresponds to the cutting blade 14 of the male jaw 10, and serves to cut the steel in cooperation with the cutting blade 14 of the male jaw 10.

Next, looking at the play control device of the present invention, the present invention, the first and second bosses 40, 50 are formed around the pin hole 12 on both sides of the male jaw (10), respectively.

The first and second bosses 40 and 50 are integrally formed around the pinhole 12, protrude in the axial direction from the pinhole 12, and male threads 42 and 52 are formed around the outer circumferential surface thereof. It is.

On the other hand, the first clearance adjustment spacer 60 is screwed to the male thread portion 42 of the first boss 40, the second clearance adjustment spacer 70 to the male thread portion 52 of the second boss 50. Is screwed in.

The first and second clearance adjusting spacers 60 and 70 have female threads 62 and 72 formed in the inner diameter thereof, respectively, on the male threads 42 and 52 of the first and second bosses 40 and 50, respectively. It is configured to be screwed.

The first and second clearance adjusting spacers 60 and 70 are tightened clockwise as they are screwed to the male threads 42 and 52 of the first and second bosses 40 and 50. It comes in close contact with both sides of (10) and projects from both sides of the male jaw (10) as it is released counterclockwise.

Accordingly, the first and second clearance adjusting spacers 60 and 70 are tightened clockwise to closely adhere to both sides of the male jaw 10, and then the male jaw 10 is fitted into the receiving groove 22 of the female jaw 20. The pin holes 12 and 22 are aligned with each other, and the main pin 30 is fitted into the pin holes 12 and 22 aligned with each other to assemble the main body 50.

When the assembly is completed, the first and second clearance adjusting spacers 60 and 70 are released in the counterclockwise direction, and the first and second clearance adjusting spacers 60 and 70 are separated from both sides of the male jaw 10. While further protruding, the inner grooves 22a and 22b of the accommodating groove 22 of the arm jaw 20 are in close contact with each other. Therefore, the gap between the male jaw 10 and the female jaw 20 is narrowed to eliminate the play. As a result, the assembly is simpler and the assembly time is shorter than the conventional assembly using the shim.

In addition, the first and second clearance adjusting spacers 60 and 70 have different protrusions protruding from the side surfaces of the jaws 10 depending on the rotational direction and the amount of rotation. Therefore, the first and second clearance adjustment spacers 60 and 70 can adjust the position of the male jaw 10 in the accommodation groove 22 left and right by adjusting only the rotation direction and the amount of rotation with respect to each other. As the position of the male jaw 10 can be adjusted left and right, the gap between the cutting blade 14 of the male jaw 10 and the cutting blade 25 of the female jaw 20 can be precisely adjusted.

Again, referring to Figures 8 and 9, the clearance control device of the present invention, to fix the position of the first and second clearance control spacers 60, 70 that adjusted the clearance of the male jaw 10 and the female jaw (20). It is provided with a position fixing means for.

The position fixing means forms a plurality of projections 80 formed at equal intervals on the outer circumferential surface of each of the first and second clearance adjusting spacers 60 and 70, and a fixing groove 82a to which the projections 80 fit. The stopper 82 is detachably fixed to the pocket 84 fixed to the side of the male jaw 10 with a bolt 86.

This position fixing means, after coupling the fixing groove (82a) of the stopper (82) to the projections (80) of the first and second play clearance spacer 60, 70, the play is adjusted, and then the stopper (82) To the pocket 84 of the male jaw 10 with a bolt 86. Therefore, the first and second clearance adjusting spacers 60 and 70 are fixed in position. In particular, the first and second clearance adjustment spacers 60 and 70 which adjust the clearance between the male jaw 10 and the female jaw 20 are fixed.

On the other hand, the projections 80 formed on the outer circumferential surfaces of the first and second clearance adjusting spacers 60 and 70 should have a pitch as small as possible, and their spacing should be made compact. This is because the amount of rotation of the first and second clearance adjusting spacers 60 and 70 decreases per click when the pitch of the projections 80 is small and the spacing is tight, and the first and second clearance adjusting spacers 60 are reduced. This is because the fine play between the male jaw 10 and the female jaw 20 can be adjusted while finely screwing along the first and second bosses 40 and 50 of the male jaw 10 only when the rotation amount of the spring 70 is small. .

According to the position fixing means and the first and second clearance adjusting spacers 60 and 70 of such a configuration, wear is generated on the contact surface between the male jaw 10 and the female jaw 20 by using the steel cutter for a long time, so that the clearance in the lateral direction is reduced. Gets bigger Then, the bolt 86 is released to disassemble the stopper 82 fixed to the pocket 84.

When the disassembly is completed, the projections 80 formed on the outer circumferential surfaces of the first and second play gaps spacers 60 and 70 are hammered with a tool to counterclock the first and second play gaps spacers 60 and 70. Loosen in the direction. Then, the first and second clearance adjustment spacers 60 and 70 are in close contact with both inner surfaces 22a and 22b of the female jaw 20 while protruding from the side of the male jaw 10. Therefore, since the clearance between the male jaw 10 and the female jaw 20 is narrowed, it is possible to compensate for the enlarged play due to wear.

Here, when the clearance correction between the male jaw 10 and the female jaw 20 is completed, it is a matter of course that the first and second clearance adjustment spacers 60 and 70 are fixed using the stopper 82 again.

When the gap between the cutting edges 14 and 25 is adjusted due to the wear of the cutting edges 14 and 25 of the male jaw 10 and the female jaw 20, the same method as described above causes the wear and tear of each other. It is possible to precisely control the gap between the open jaw (10) and the cutting blades (14, 25) of the female jaw (20).

Next, Fig. 10 is a diagram showing a modification of the first embodiment. The play arrangement of the modified example is a separation preventing means for preventing separation of the male jaw 10 and the female jaw 20 when the main pin 30 is removed from the pin holes 12 and 24 of the male jaw 10 and the female jaw 20. It is further provided.

The separation preventing means has first and second protrusions 24a and 24b formed around the pinholes 24 of both inner surfaces 22a and 22b of the arm jaw 20, respectively.

The first and second protrusions 24a and 24b are boss-type protrusions projecting from the circumference of the pinholes 24 on both inner surfaces 22a and 22b toward the inner side of the receiving groove 22, and thus the pinholes ( 24 is formed in an "annular" along the circumference.

The separation preventing means includes locking grooves 64 and 74 formed in the inner diameters of the first and second clearance adjusting spacers 60 and 70 so that the first and second protrusions 24a and 24b can be fitted into each other. do.

 The locking grooves 64 and 74 are formed by expanding one side of the inner diameters of the first and second clearance adjusting spacers 60 and 70, and are formed in an annular shape along the circumference of the inner diameter. The locking grooves 64 and 74 are configured to be walked with the first and second protrusions 24a and 24b of the arm jaw 20 fitted therein. Therefore, even when the main pin 30 is removed from the pinholes 12 and 24 of the female jaw 20 and the male jaw 10, the male jaw 10 is prevented from being separated from the female jaw 20. Remove the main pin (30), it is easy to assemble the removed main pin 30 back to the arm jaw (20) and male jaw (10). In particular, when the removed main pin 30 is reassembled into the pin holes 12 and 24 of the female jaw 20 and the male jaw 10, the pin holes 12 and 24 of the female jaw 20 and the male jaw 10 are assembled. This saves you the hassle of sorting them one by one.

Here, when the first and second protrusions 24a and 24b of the female jaw 20 are tightened to the both sides of the male jaw 10 by tightening the first and second clearance adjusting spacers 60 and 70 clockwise, It should be disengaged from the locking grooves 64 and 74. When the female jaw 20 and the male jaw 10 need to be completely separated, the first and second protrusions 24a and 24b of the female jaw 20, which are fitted and coupled to each other, and the first and second clearance adjusting spacers 60 , 70 to completely separate the locking grooves (64, 74) from each other.

On the other hand, Figure 11 is a view showing a modification of the separation prevention means. The separation preventing means of the modification includes the first and second locking grooves 24c and 24d formed around the pinholes 24 of both inner surfaces 22a and 22b of the female jaw 20, respectively.

And the separation prevention means of a modification is provided with the projections 66 and 76 which protrude from the 1st and 2nd clearance adjustment spacers 60 and 70, respectively, so that it may fit in the 1st and 2nd catching grooves 24c and 24d. .

The separation preventing means of this modification is to release the first and second clearance adjusting spacers 60 and 70 and move them to the ends of the first and second bosses 40 and 50, respectively. Each of the protrusions 66 and 76 of the 60 and 70 is fitted into the first and second catching grooves 24c and 24d. Therefore, even when the main pin 30 is removed from the pin holes 12 and 24 of the female jaw 20 and the male jaw 10, the male jaw 10 is prevented from being separated from the female jaw 20.

Next, Fig. 12 is a diagram showing another modification of the first embodiment. In another variant, the clearance adjusting device forms the first and second bosses 40 and 50 around the pinholes 12 on both sides of the male jaw 10, and the first and second bosses 40 and 50. Has a configuration formed by both ends of the bush 90 press-fitted into the pinhole 12 of the male jaw (10).

That is, the bush 90 has male threads 42 and 52 formed on both outer circumferences of the bush 90. The bush 90 is manufactured separately from the male jaw 10 and press-fitted into the pinhole 12 of the male jaw 10. The first and second clearance adjusting spacers 60 and 70 are screwed to both male threads 42 and 52 of the "

 Of course, the first and second clearance adjusting spacers 60 and 70 screwed to both male sections 42 and 52 are, as with the first embodiment, screwed along each of the male sections 42 and 52, respectively. Protrudes further from both sides of (10), thereby adjusting the play of the male jaw 10 and the female jaw (20) of course.

In addition, the first and second clearance adjusting spacers 60 and 70 that adjust the clearance between the male jaw 10 and the female jaw 20 are of course fixed by the position fixing means.

The clearance adjusting device of another modification of this configuration is very easy to manufacture since it is not necessary to form the first jaw 10 and the first and second bosses 40 and 50 by directly processing the jaws 10. In particular, there is an advantage that can be applied to existing products.

Next, FIG. 13 is a view showing a second embodiment of the clearance adjusting device according to the present invention. The clearance adjusting device of the second embodiment has a configuration in which the first and second bosses 40 and 50 are formed around the pinholes 24 of both inner surfaces 22a and 22b of the arm jaw 20, respectively.

Of course, male threads 42 and 52 are formed around the first and second bosses 40 and 50, and the first and second clearance adjusting spacers 60 and 70 are screwed around the first and second bosses 40 and 50, respectively. And of course it also has a position fixing means for fixing the position of the first and second clearance control spacer (60, 70).

On the other hand, the first and second bosses 40 and 50 press separate bushes 92 into both pinholes 24 of the arm jaw 20, and form large diameter portions at the end portions of the pushed bush 92. It is configured according to.

The clearance adjusting device of the second embodiment prevents separation of the male jaw 10 and the female jaw 20 when the main pin 30 is removed from the pinholes 12 and 24 of the male jaw 10 and the female jaw 20. It is also provided with a separation prevention means.

The separation preventing means has first and second protrusions 100 and 102 formed around the pinholes 12 on both sides of the male jaw 10, respectively.

The first and second protrusions 100 and 102 are boss-like protrusions protruding from the circumference of the pinhole 12 on both sides, and are formed in an annular shape along the circumference of the pinhole 12.

The separation preventing means includes locking grooves 104 and 106 formed in the inner diameters of the first and second clearance adjusting spacers 60 and 70 so that the first and second protrusions 100 and 102 may be fitted. do.

 The locking grooves 104 and 106 are formed by expanding the other side of the inner diameters of the first and second clearance adjusting spacers 60 and 70, and are formed in an annular shape along the circumference of the inner diameter. The locking grooves 104 and 106 are configured to be walked with the first and second protrusions 100 and 102 of the male jaw 10 fitted. Therefore, even when the main pin 30 is removed from the pinholes 12 and 24 of the female jaw 20 and the male jaw 10, the male jaw 10 is prevented from being separated from the female jaw 20. Remove the main pin (30), it is easy to assemble the removed main pin 30 back to the arm jaw (20) and male jaw (10). In particular, when the removed main pin 30 is reassembled into the pin holes 12 and 24 of the female jaw 20 and the male jaw 10, the pin holes 12 and 24 of the female jaw 20 and the male jaw 10 are assembled. This saves you the hassle of sorting them one by one.

Here, when the first and second protrusions 100 and 102 of the male jaws 10 are in close contact with both inner surfaces of the female jaws 20 by tightening the first and second clearance adjusting spacers 60 and 70 clockwise. It should be separated from the locking grooves 104 and 106. When the female jaw 20 and the male jaw 10 need to be completely separated, the first and second protrusions 100 and 102 of the male jaw 10 are fitted and coupled to each other, and the first and second clearance adjusting spacers 60 , 70 to completely separate the locking grooves 104 and 106 from each other.

On the other hand, Figure 14 is a view showing a modification of the separation prevention means. The separation preventing means of the modification includes first and second locking grooves 110 and 112 formed around the pinholes 12 on both sides of the male jaw 10, respectively.

And the separation prevention means of the modification is provided with protrusions 114 and 116 protruding from the first and second clearance adjusting spacers 60 and 70 so as to be fitted into the first and second locking grooves 110 and 112, respectively. .

The separation preventing means of this modification is to release the first and second clearance adjusting spacers 60 and 70 and move them to the ends of the first and second bosses 40 and 50, respectively. Each of the protrusions 114 and 116 of the 60 and 70 is fitted into the first and second locking grooves 110 and 112. Therefore, even when the main pin 30 is removed from the pin holes 12 and 24 of the female jaw 20 and the male jaw 10, the male jaw 10 is prevented from being separated from the female jaw 20.

On the other hand, in the first and second embodiments of the present invention, the first and second bosses 40 and 50 are formed on both sides of the male jaw 10 or on both inner surfaces of the female jaw 10. Although not limited thereto, for example, the first boss 40 is formed on one side of the male jaw 10, and the second boss 50 is formed on the inner side of the opposite arm 20. It is also possible. In addition, the first boss 40 is formed on the inner side of the female jaw 20, the second boss 50 may be formed on the other side of the opposite male jaw (10).

As a result, the first and second bosses 40 and 50 can be installed anywhere regardless of the installation location as long as they can be disposed between the male jaws 10 and the female jaws 20, respectively.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

As described above, according to the jaw gap adjusting device of the steel cutting machine according to the present invention, by finely controlling the play between the gap of the male jaw and the female jaw and the cutting blade through the first and second clearance adjusting spacer between the male jaw and the female jaw In addition to improving cutting performance, it is possible to prevent the iron from being caught between the male and female jaws. In addition, even if the clearance between the side jaw and the female jaw increases, the first and second clearance adjusting spacers can be rotated to adjust the spacing between the male and female jaws, without disassembling the male and female jaws. The clearance can be compensated for, so that the cutting operation does not stop for a long time due to the clearance, thereby increasing the operating efficiency of the machine.

Claims (11)

In the jaw gap adjustment device of the steel cutting machine having a male jaw and female jaw coupled to each other, and a main pin for rotatably connecting at least one of the male jaw and female jaw, First and second bosses respectively provided between the male and female jaws, each having a male screw portion formed in an axial direction of the main pin; Both first and second clearance adjusting spacers are respectively screwed to the male threaded portions of the first and second bosses and adjust the play between the male and female jaws while screwing along each of the first and second bosses. Jaw gap adjustment device of the steel cutting machine comprising a. The method of claim 1, Jaw gap adjustment device of the steel cutting machine, characterized in that it further comprises a position fixing means for fixing the position of the first and second play gap adjustment spacer adjusting the play between the male jaw and the female jaw. The method of claim 1, The first and second bosses, jaw gap adjustment device of the steel cutting machine, characterized in that each formed integrally around the pin hole on both sides of the male jaw. The method of claim 1, The first and second bosses, jaw gap adjustment device of the steel cutter is characterized in that the press is pressed into the pin hole of the male jaw, both ends are formed by a bush protruding more than both sides of the male jaw. The method according to claim 3 or 4, Jaw gap adjustment device of the steel cutter further comprises a separation preventing means for preventing separation of the male jaw and female jaw, when the main pin is removed from the pin hole of the male jaw and female jaw. The method of claim 5, The separation preventing means is inserted into the female jaw so as to be fitted into the inner diameter of the first and second clearance adjustment spacers, respectively, when the first and second clearance adjustment spacers are screwed to the ends of the first and second bosses. Jaw gap adjustment device of the steel cutter, characterized in that it comprises a first and second protrusions formed. The method of claim 5, The separation preventing means is formed in the female jaw so that the first and second clearance adjustment spacers are fitted and walked, respectively, when the first and second clearance adjustment spacers are screwed to the ends of the first and second bosses. Jaw gap adjustment device of the steel cutter, characterized in that it comprises a first and second locking groove. The method of claim 1, The first and second bosses, jaw gap adjustment device of the steel cutter, characterized in that formed integrally around the pin hole on both inner side of the female jaw. The method of claim 8, Jaw gap adjustment device of the steel cutter further comprises a separation preventing means for preventing separation of the male jaw and female jaw, when the main pin is removed from the pin hole of the male jaw and female jaw. The method of claim 9, The separation preventing means, when the first and second clearance adjustment spacer is screwed to the end of the first and second boss, the first jaw and the second clearance adjustment spacer to be fitted into the inner diameter of each of the first jaw so as to walk. Jaw gap adjustment device of the steel cutter, characterized in that it comprises a first and second protrusions formed. The method of claim 9, The separation preventing means is formed in the male jaw so that the first and second clearance adjustment spacers are fitted and walked, respectively, when the first and second clearance adjustment spacers are screwed to the ends of the first and second bosses. Jaw gap adjustment device of the steel cutter, characterized in that it comprises a first and second locking groove.

Images