JP5284930B2 - Cutting machine - Google Patents

Description

  The present invention relates to a cutting machine for cutting and removing an object to be cut that remains protruding from a pillar such as a steel pillar of a building for various purposes during construction.

  Conventionally, in this type of cutting machine, a mounting base with mounting legs attached to the four corners of the mounting frame, and a main body frame supported so as to be movable laterally with respect to the mounting frame, are located above the mounting frame. A driving roller that is rotated by a driving motor is supported, and a driven roller is supported below the mounting frame. A rotating shaft installed horizontally between the mounting legs is rotated by a handle so that the main body frame becomes a rotating shaft. The band saw that is stretched between the driving roller and the driven roller in the longitudinal direction moves laterally along the steel column laid down in the lateral direction, and the steel column covered The cut product can be cut and removed (see Patent Document 1 below).

JP 2006-266003 A

When using such a cutting machine, it is necessary to cut and remove a to-be-cut object with a band saw so that a to-be-cut object may not protrude from a steel pillar as much as possible.
The present invention is a cutting machine for cutting and removing a cut object remaining protruding from an upright pillar, and cutting and removing the cut object with a band saw so that the cut object does not protrude as much as possible from the pillar. It is an object.

The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 9) of the embodiments described later.
The cutting machine according to the invention of claim 1 is configured as follows.
This cutting machine includes a cutting unit 21 that can move in the vertical direction Z along a guide rail 20 that extends in the vertical direction Z between the upper support 12 and the lower support 16 fixed to the pillar 1. It has. The cutting unit 21 includes a mounting body (slider 22 and bracket 23) supported so as to be movable in the vertical direction Z with respect to the guide rail 20, a driving roller 24, a driven roller 25, and a driving motor 26 supported by the mounting body 23. The endless band saw 27 spanned between the drive roller 24 and the driven roller 25 rotated by the drive motor 26, and the vertical direction Z together with the mounting body 22 while being pressed against the guide rail 20 by the elastic force of the spring 34. And a positioning pin 33 that moves to the position . On the upper support base 12 and the lower support base 16, the mounting bases 42 and 51 that can set the distance of the endless band saw 27 with respect to the column 1 can be moved and adjusted in a direction X that approaches and separates from the column 1. It is attached to. An object to be cut that protrudes from the column 1 so that the attachment bodies 22 and 23 are lowered together with the driving roller 24, the driving motor 26, the driven roller 25, and the endless band saw 27 by the dead weight of the cutting unit 21. 8 and 9 are cut by an endless band saw 27. At that time, the positioning pin 33 is engaged with the positioning holes 35 and 36 formed in the guide rail 20 by the elastic force of the spring 34 to prevent the cutting unit 21 from being lowered.

In the first aspect of the present invention, the mounting bases 42 and 51 of the upper support base 12 and the lower support base 16 can be moved and adjusted to set the distance of the endless band saw 27 with respect to the pillar 1. It is possible to cut and remove the workpieces 8 and 9 remaining protruding from the endless band saw 27 so as not to protrude as much as possible from the pillar 1. Further, when the cutting unit 21 is lowered by its own weight, the lowering of the cutting unit 21 can be easily prevented by the positioning pins 33 and the positioning holes 35 and 36.

  In the upper support 12 and the lower support 16 according to the second aspect of the invention based on the first aspect, the mounting tables 42 and 51 are detachably attached. In the invention of claim 2, the cutting machine is stable to the column 1 by changing the mounting table 42 or 51 to an appropriate form according to the form of the column 1 on which the upper support 12 and the lower support 16 are mounted. Can be installed well.

  In the invention of claim 3 premised on the invention of claim 1 or claim 2, between the upper support 12 and the lower support 16, between the pillar 1 and the guide rail 20, and the attachment body 22. , 23 is a movement allowable space S provided by both sides of the guide rail 20 in the left-right direction Y orthogonal to the movement direction Z of the drive rails 23, and a drive roller 24 is disposed on one side of the left and right sides of the guide rail 20. In addition, a driven roller 25 is disposed on the other side. In the invention of claim 3, since the design focuses only on the cutting machine for cutting and removing the workpieces 8 and 9 remaining protruding from the standing pillar 1, the cutting unit 21 is simply lowered by its own weight. Well, the moving means of the cutting unit 21 can be omitted. Therefore, the movement allowable space S can be set small enough that the drive motor 26, the drive roller 24, the driven roller 25, and the endless band saw 27 can be disposed without any trouble.

  In the invention of claim 4 based on the invention of claim 3, a moving force generated when the workpieces 8 and 9 are cut by the endless band saw 27 between the upper support base 12 and the lower support base 16. As a stopper for preventing F, a guide member (guide rod 39 and guide) which supports the cutting unit 21 so as to be movable in the vertical direction Z on the drive roller 24 side disposed on one of the left and right sides of the guide rail 20. A cylinder 41) is attached. In the invention of claim 4, the guide members 39 and 41 can prevent the cutting machine from being touched sideways.

  In the lower support base 16 according to the invention of claim 5 based on the invention of claim 3 or claim 4, the magnet 62 a attracted to the pillar 1 on both the left and right sides with respect to the guide rail 20 is approached and separated from the pillar 1. It is attached so that it can swing in the direction X. According to the fifth aspect of the present invention, the cutting machine is attached to the pillar 1 with high stability according to the form of the pillar 1 on which the lower support base 16 is placed by the magnet 62a attached to the lower support base 16 so as to be swingable. be able to.

In the invention of claim 6 premised on the invention of any one of claims 1 to 5 , the lower support base 16 includes the upper support base 12 and the lower support base 16 on the pillar 1. A positioning portion (band support member 59) that can be aligned with the mark 10a of the gauge 10 supported on the upper end portions of the workpieces 8 and 9 protruding from the pillar 1 when fixing is provided. In the invention of claim 6 , when the positioning unit 59 of the cutting machine is aligned with the mark 11 drawn on the pillar 1 by the mark 10a of the gauge 10, and the cutting machine is attached to the pillar 1, the endless band saw 27 is attached to the workpieces 8, 9 Can be adjusted to the cutting start position.

In the lower support base 16 according to the invention of claim 7 based on the invention of any one of claims 1 to 6 , a support member 59 fixed to the column 1 is provided separately. Yes. According to the seventh aspect of the present invention, the cutting machine (the cutting machine main body excluding the supporting member 59) is mounted on the support member 59 fixed to the column 1 and can be easily attached to and detached from the column 1.

In the present invention, when the cutting unit 21 descends due to its own weight, the workpieces 8 and 9 remaining protruding from the standing pillar 1 are cut and removed by the endless band saw 27 so as not to protrude as much as possible from the pillar 1. In addition, the lowering of the cutting unit 21 can be easily prevented.

(A) is a fragmentary perspective view which shows the state which attached the support plate to the steel column, (b) is a fragmentary perspective view which shows the state in which the cut piece after cut | disconnecting the support plate remained in the steel column. (C) is a front view which shows the state which supported the gauge to the cut piece. It is a front view which shows the highest rise state of a cutting unit in the cutting machine of this embodiment attached to the steel column of Fig.1 (a). It is a side view which similarly shows the highest rise state of a cutting unit. (A) (b) is a top view which shows the mounting base of the upper side support stand of a cutting machine, respectively. (A) (b) is a bottom view which shows the mounting base of the lower side support stand of a cutting machine, respectively. It is a bottom view which shows the magnet of the lower side support stand of a cutting machine. (A) is the fragmentary sectional view which looked at the state which engaged the positioning pin of the cutting unit in the positioning hole of the guide rail in the cutting machine of this embodiment attached to the steel pillar of Drawing 1 (a) from the side, (B) is a partial cross-sectional view of the state in which the positioning pin is pulled out of the positioning hole and pressed against the guide rail, as viewed from the side, and (c) is also pulled out of the positioning hole and hooked on the support cylinder. It is the fragmentary sectional view which looked at the state from the side. It is a front view which shows the lowest-falling state of a cutting unit in the cutting machine of this embodiment attached to the steel pillar of Fig.1 (a). It is a side view which similarly shows the lowest fall state of a cutting unit.

Hereinafter, a cutting machine according to an embodiment of the present invention will be described with reference to the drawings.
As shown in the steel column 1 shown in FIG. 1A, a plate (not shown) is attached to the reference positions of the support plates 4 and 5 attached to the upper column 2 and the lower column 3, respectively. After these support plates 4 and 5 are connected to each other by this mating plate (not shown), the upper column 2 and the lower column 3 are accurately aligned with the mating plate (not shown) without shifting from each other. When connected by the weld 7, the support plates 4 and 5 remain protruding from the steel column 1. The support plate 5 of the lower column 3 has a notch 6 that can avoid the weld 7 in the upper half portion separated from the support plate 4 of the upper column 2 and the steel column 1. When the support plates 4 and 5 are melted and removed, the base portions of the support plates 4 and 5 remain on the steel column 1 as the cut pieces 8 and 9 as shown in FIG. This cutting machine is for cutting and removing these cutting pieces 8 and 9 (objects to be cut). For example, when cutting the cutting piece 8 of the upper column 2, before setting the cutting machine on the steel column 1, the bifurcated gauge 10 is placed on and supported by the upper end of the cutting piece 8, and the gauge The marking line 11 (mark) connecting the 10 lower end portions 10a (marks) is drawn on the steel column 1.

  In the upper support base 12 shown in FIGS. 2, 8 and 3, the T-shaped main body 13 includes a fixing part 14 extending in the left-right direction Y and an arm part 15 extending in the front-rear direction X. The main body portion 17 has an arm portion 19 extending in the front-rear direction X from the fixed portion 18, and is detachably installed so that one guide rail 20 extends in the vertical direction Z between the front end portions of the arm portions 15, 19. Then, the cutting unit 21 can move in the vertical direction Z along the guide rail 20.

  The cutting unit 21 includes a slider 22 (attachment body) supported so as to be movable in the vertical direction Z with respect to the guide rail 20, a bracket 23 (attachment body) attached to the slider 22 and extending in the left-right direction Y, A driving roller 24, a driven roller 25, and a driving motor 26 supported by the bracket 23, and an endless band saw 27 spanned between the driving roller 24 and the driven roller 25 rotated by the driving motor 26 are provided. ing. Between the upper support base 12 and the lower support base 16 between the guide rail 20 and the assumed surface P connecting the mounting surfaces 14a and 18a of the fixing portions 14 and 18 with respect to the steel column 1, a movement allowable space is provided. S is provided. In this cutting unit 21, the bracket 23 is disposed in the movement allowable space S behind the guide rail 20, and is on the left and right sides of the guide rail 20 in the left-right direction Y orthogonal to the moving direction (vertical direction Z) of the slider 22. The drive roller 24 is disposed on the upper side of the bracket 23 in the movement allowable space S on one side, and the drive motor 26 is disposed on the lower side of the bracket 23, and the driven roller in the movement allowable space S on the other side. 25 is disposed above the bracket 23. The rotation center 24a of the drive roller 24 and the rotation center 25a of the driven roller 25 extend in the vertical direction Z, and the endless band saw 27 spanned between the drive roller 24 and the driven roller 25 has an upward edge. And a downward edge. The driven roller 25 is supported by the bracket 23 via a movable adjustment body 28 so that the distance L between the rotation center 24a of the drive roller 24 and the rotation center 25a of the driven roller 25 can be changed.

  The slider 22 includes a slider main body 29 to which a bracket 23 is attached, and a lid 30 that holds the guide rail 20 between the slider main body 29. The lid body 30 is tightened by the set screws 31 to such an extent that the slider body 29 is allowed to move the slider 22 with respect to the guide rail 20, and the set screws 31 are loosened so that the support holes 30 a of the lid body 30 are respectively set. It can be attached to and detached from the slider main body 29 by removing it from the set screw 31. When the lid 30 is separated from the slider body 29, the cutting unit 21 can be removed from the guide rail 20.

  As shown in FIG. 7, a positioning pin 33 is supported on the support cylinder 32 attached to the lid 30 of the slider 22 in the cutting unit 21 and is urged toward the guide rail 20 by the elastic force of the compression coil spring 34. ing. In the guide rail 20, positioning holes 35 and 36 are formed on the upper end side and the lower end side. Except for the positioning holes 35 and 36, the positioning pin 33 moves in the vertical direction Z together with the slider 22 while being pressed against the guide rail 20 by the elastic force of the compression coil spring 34. In each of the positioning holes 35, 36, the positioning pin 33 is engaged by the elastic force of the compression coil spring 34 to prevent the slider 22 from moving.

  Between the support plate 37 attached to the fixing portion 14 of the upper support base 12 and the support plate 38 attached to the fixing portion 18 of the lower support base 16, the left and right sides with respect to the guide rail 20 are arranged. Among them, a guide rod 39 (guide member) is installed adjacent to the cutting unit 21 on the drive roller 24 side, and a guide tube 41 (guide member) is attached to the bracket 40 attached to the cutting unit 21. The guide cylinder 41 is inserted into the guide rod 39. When the cutting unit 21 moves in the vertical direction Z along the guide rail 20, the guide cylinder 41 also moves in the vertical direction Z along the guide rod 39.

  As shown in FIGS. 2, 8 and 3, 9, the upper support 12 has a mounting table 42. In this mounting table 42, as shown in FIG. 4 (a), an interlocking portion 43 projects from the central portion in the left-right direction Y, and guide holes 44 are formed on both left and right sides. A mounting pin 45 capable of adjusting a protruding dimension from the mounting surface 42a facing is screwed. A locking plate 43a is detachably attached to the interlocking portion 43 by a set screw (not shown). Notch holes (not shown) are formed in the interlocking portion 43 and the locking plate 43a side by side in the front-rear direction X, and these notch holes (not shown) are downwardly formed by the notches 43b of the mounting table 42. It is open. An adjustment screw 47 is screwed into a support portion 46 that faces the interlocking portion 43 and protrudes from the upper side of the fixing portion 14. The adjusting screw 47 is integrally provided with a locking portion 47a. When the adjusting screw 47 and its locking part 47a are inserted into the notch 43 (not shown) of the interlocking part 43 and the locking plate 43a from the notch 43b of the mounting table 42, the locking part 47a is locked to the locking plate 43a. Thus, the adjustment screw 47 is connected to the interlocking portion 43. Further, a guide shaft 49 is screwed to the fixed portion 14 so as to face the guide hole 44 and is inserted into the guide hole 44. Band winding rods 50 are attached to the left and right sides of the mounting table 42 and protrude upward. When the adjustment screw 47 is rotated together with the locking portion 47a and moved in the front-rear direction X with respect to the support portion 46, the interlocking portion connected to the adjustment screw 47 while the guide shaft 49 and the guide hole 44 move relative to each other. 43 also moves in the front-rear direction X, and the mounting table 42 moves in the front-rear direction X together with the mounting pin 45 and the belt winding rod 50. When the guide shaft 49 is fastened to the fixed portion 14, the mounting table 42 can be positioned on the fixed portion 14. The mounting table 42 shown in FIG. 4 (a) has a flat mounting surface 42a in accordance with the form of the steel column 1 shown in FIG. 1 (b), but the mounting table 42 shown in FIG. 4 is different from the mounting table 42 shown in FIG. 4A in that it has an arcuate mounting surface 42 a and does not have a mounting pin 45. The adjustment screw 47 and its locking portion 47a are removed from the notch hole (not shown) of the interlocking portion 43 and the locking plate 43a through the notch 43b of the mounting table 42, whereby the interlocking portion 43 and the locking plate 43a are removed from the adjustment screw 47. When the mounting table 42 is separated by removing the guide shaft 49 from the fixed portion 14 and separating from the locking portion 47a, the mounting table 42 shown in FIG. 4A and the mounting table 42 shown in FIG. Can be exchanged for each other.

  The support portion 46, the adjusting screw 47, the locking portion 47a, the interlocking portion 43, and the locking plate 43a constitute a moving operation means for moving the mounting table 42 and an attaching / detaching means for attaching / detaching the mounting table 42. Has been. Further, the guide hole 44 and the guide shaft 49 constitute movement permitting means for allowing movement of the mounting table 42, positioning means for positioning the mounting table 42, and attaching / detaching means for attaching / detaching the mounting table 42. .

  As shown in FIGS. 2, 8 and 3, 9, the lower support 16 has a mounting table 51. In this mounting table 51, as shown in FIG. 5 (a), an interlocking portion 52 projects from the central portion in the left-right direction Y, and guide holes 53 are formed on both left and right sides. A mounting pin 54 that can adjust a projecting dimension from the mounting surface 51a facing is screwed. A locking plate 52a is detachably attached to the interlocking portion 52 by a set screw (not shown). Notch holes (not shown) are formed in the interlocking portion 52 and the locking plate 52a side by side in the front-rear direction X, and these notch holes (not shown) are moved upward at the notch 52b of the mounting table 51. It is open. An adjustment screw 56 is screwed onto a support portion 55 that faces the interlocking portion 52 and projects from the lower side of the fixing portion 18. The adjusting screw 56 is integrally provided with a locking portion 56a. When the adjusting screw 56 and its locking part 56a are inserted into the notch hole (not shown) of the interlocking part 52 and the locking plate 52a from the notch 52b of the mounting table 51, the locking part 56a is locked to the locking plate 52a. Then, the adjustment screw 56 is connected to the interlocking portion 52. Further, a guide shaft 58 is screwed to the fixed portion 18 so as to face the guide hole 53 and is inserted into the guide hole 53. When the adjustment screw 56 is rotated together with the locking portion 56a and moved in the front-rear direction X with respect to the support portion 55, the guide shaft 58 and the guide hole 53 move relative to each other, and the interlocking portion connected to the adjustment screw 56. 52 also moves in the front-rear direction X, and the mounting table 51 moves in the front-rear direction X together with the mounting pins 54. When the guide shaft 58 is fastened to the fixed portion 18, the mounting table 51 can be positioned on the fixed portion 18. The mounting table 51 shown in FIG. 5 (a) has a flat mounting surface 51a in accordance with the form of the steel column 1 shown in FIG. 1 (b), but the mounting table 51 shown in FIG. 5 is different from the mounting table 51 shown in FIG. 5A in that it has an arcuate mounting surface 51a and does not have a mounting pin 54. By removing the adjusting screw 56 and its locking portion 56a from the notch hole (not shown) of the interlocking portion 52 and the locking plate 52a through the notch 52b of the mounting table 51, the interlocking portion 52 and the locking plate 52a are removed from the adjusting screw 56. When the mounting table 51 is separated by removing the guide shaft 58 from the fixed portion 18 and separating from the locking portion 56a, the mounting table 51 shown in FIG. 5A and the mounting table 51 shown in FIG. Can be exchanged for each other.

  The support portion 55, the adjusting screw 56, the locking portion 56a, the interlocking portion 52, and the locking plate 52a constitute moving operation means for moving the mounting table 51 and attaching / detaching means for attaching / detaching the mounting table 51. Has been. Further, the guide hole 53 and the guide shaft 58 constitute movement permitting means for allowing movement of the mounting table 51, positioning means for positioning the mounting table 51, and attaching / detaching means for attaching / detaching the mounting table 51. .

  Further, in the lower support 16, a band support member 59 is disposed below the fixed portion 18 so that the mounting table 51 can be placed at the center in the left-right direction Y. As shown in FIG. A swing plate 61 is supported on the support shaft 60 screwed to the left and right sides of the member 59 so as to be movable in the axial direction of the support shaft 60, and an adsorber 62 is attached to the end of the swing plate 61. It is worn. A magnet 62a is fitted into the attracting body 62 and exposed to the outside. The magnet 62 a can swing in a direction approaching and separating from the steel column 1 by tilting of the swing plate 61 with respect to the support shaft 60. A stopper plate 63 is attached to the band support member 59, and a stopper screw 66 is screwed to the stopper plate 63, and the stopper plate 63 against the locking plate 52a extending downward at the interlocking portion 52 of the mounting table 51 described above. The movement of the band support member 59 in the left-right direction Y and the front-rear direction X is regulated by the engagement of the stopper screw 66 and the pressing contact of the stopper screw 66.

First, the cutting machine configured as described above is attached to the steel column 1 as follows.
As shown in FIG. 7C, the positioning pin 33 of the slider 22 is lifted against the elastic force of the compression coil spring 34 and hooked on the support cylinder 32 in the cutting unit 21, thereby separating the positioning pin 33 from the guide rail 20. At the same time, the compression coil spring 34 does not bias the positioning pin 33, the cutting unit 21 is moved along the guide rail 20 to the vicinity of the upper support 12, and the positioning pin 33 is positioned near the upper positioning hole 35 of the guide rail 20. 7 is released, and the positioning pin 33 is engaged with the upper positioning hole 35 by the elastic force of the compression coil spring 34 as shown in FIG. Accordingly, the cutting unit 21 is positioned with respect to the guide rail 20 at the upper limit position near the upper support 12.

  Next, in a state where the upper end portion (positioning portion) of the band support member 59 of the lower support base 16 is aligned with the marking line 11 of the steel column 1, the band 65 is wound around the band support member 59 and the lower column 3. Tie to. Further, in the standing cutting machine (the cutting machine main body excluding the band support member 59), the mounting table 51 of the lower support base 16 is placed on the band support member 59 to receive the load of the entire cutting machine, and the steel column 1 and When the cut piece 8 of the upper column 2 and the cut piece 9 of the lower column 3 are inserted into the allowable movement space S between the guide rail 20 and the endless band saw 27 of the cutting unit 21, Located in the upper neighborhood. Thereafter, the mounting surface 18 a of the fixing portion 18 in the lower support base 16 is applied to the lower column 3 of the steel column 1, and the mounting surface 14 a of the fixing portion 14 in the upper support base 12 is set to the upper side of the steel column 1. In a state of being applied to the column 2, the band 64 is wound around the band winding rod 50 and tied to the upper column 2. At that time, the mounting table 42 of the upper support table 12 and the mounting table 51 of the lower support table 16 are moved and adjusted in the direction approaching and separating from the steel column 1 (front-rear direction X) by adjusting screws 47 and 56. The distance of the endless band saw 27 with respect to is set to an optimum state.

  2 and 3, after attaching the cutting machine to the steel column 1, the endless band saw 27 is rotated in the cutting unit 21, and the positioning pin 33 of the slider 22 is lifted and pulled out from the upper positioning hole 35 of the guide rail 20. 7B, while the positioning pin 33 is pressed against the guide rail 20 by the elastic force of the compression coil spring 34, the slider 22 is moved to the bracket 23, the drive roller 24, and the drive motor by the weight of the cutting unit 21. 26, the driven roller 25, and the endless band saw 27 are lowered with respect to the guide rail 20, and the endless band saw 27 cuts the cut piece 8 of the upper column 2 near the steel column 1 at the time of lowering. At the time of cutting, the guide cylinder 41 descending together with the cutting unit 21 moves along the guide rod 39, so that the moving force F generated at the time of cutting by the endless band saw 27 is blocked to prevent the cutting machine from touching sideways.

  Next, when the positioning pin 33 of the slider 22 is engaged with the lower positioning hole 36 of the guide rail 20 by the elastic force of the compression coil spring 34 as shown in FIG. 8 and 9, the endless band saw 27 is positioned between the cut piece 8 of the upper column 2 and the cut piece 9 of the lower column 3.

  After cutting the cutting piece 8 of the upper column 2 in this way, the band 64 is removed from the band winding rod 50 of the upper support 12 and the cutting machine placed on the band support member 59 is removed from the steel column 1. . Thereafter, the belt 65 is removed from the belt support member 59 and the belt support member 59 is also removed from the steel column 1.

Next, when the cutting piece 9 of the lower column 3 is cut, the cutting machine is attached again to the steel column 1 and cut in the same manner as the cutting piece 8 of the upper column 2.
This embodiment has the following effects.

  (1) When the cutting machine is attached to the steel column 1, the mounting tables 42 and 51 of the upper support table 12 and the lower support table 16 are moved and adjusted by the adjusting screws 47 and 56, so that the endless band saw for the steel column 1 is obtained. 27 can be set to an optimum state, so that the cut pieces 8 and 9 protruding from the standing steel column 1 are cut and removed by the endless band saw 27 so as not to protrude from the steel column 1 as much as possible. be able to.

  (2) Since the mounting tables 42 and 51 of the upper support table 12 and the lower support table 16 are made detachable, the cutting machine is changed to the mounting table 42 and 51 having an appropriate form according to the form of the steel column 1. It can be attached to the steel column 1 with good stability.

  (3) Since the design focuses only on the cutting machine for cutting and removing the cut pieces 8 and 9 of the support plates 4 and 5 remaining protruding from the standing steel column 1, the cutting unit 21 is lowered by its own weight. The moving means of the cutting unit 21 can be omitted. Accordingly, it is possible to reduce the size of the cutting machine by setting the movement allowable space S in which the drive motor 26, the drive roller 24, the driven roller 25, and the endless band saw 27 are disposed small.

  (4) By the guide members (guide rod 39 and guide tube 41) that movably support the cutting unit 21 on the drive roller 24 side, the moving force F generated when the cut pieces 8, 9 are cut by the endless band saw 27 is blocked. Since the stopper is also used, it is possible to easily perform the cutting operation by preventing the cutting machine from sideways.

  (5) When the cutting unit 21 is lowered by its own weight, the lowering of the cutting unit 21 can be easily prevented by the positioning pins 33 of the slider 22 and the positioning holes 35 and 36 of the guide rail 20.

(6) The cutting machine can be attached to the steel column 1 with high stability according to the form of the column 1 on which the lower support table 16 is placed by the magnet 62a attached to the lower support table 16 so as to be swingable. .
(7) When the cutting machine is attached to the steel column 1 by aligning the band support member 59 of the lower support 16 with the marking line 11 drawn on the steel column 1 by the gauge 10, the endless band saw 27 is attached to the support plates 4, 5 It is possible to match the cutting start position with respect to the cut pieces 8 and 9.

  (8) Since the band support member 59 fixed to the steel column 1 by the band 65 is provided separately from the main portion 17 in the lower support 16, the band support member 59 fixed to the steel column 1 is used as a cutting machine. It can be easily attached to and detached from the steel column 1 with the (cutting machine main body excluding the band support member 59) placed thereon.

For example, the following embodiment may be configured as follows.
In the mounting tables 42 and 51 of the upper support table 12 and the lower support table 16, the support portions 46 and 55, the adjusting screws 47 and 56, the locking portions 47 a and 56 a thereof, the interlocking portions 43 and 52, and the locking plates 43 a and The moving operation means and the attaching / detaching means constituted by 52a are omitted, and only the movement allowing means, positioning means and attaching / detaching means constituted by the guide holes 44 and 53 and the guide shafts 49 and 58 are provided.

  The locking portions 47a and 56a provided integrally with the adjusting screws 47 and 56 are changed to detachable locking screws, and the adjusting screws with the locking screws removed are used as the interlocking portions 43 and 52 and the locking plates 43a and 52a. You may make it insert / remove with respect to.

  The mounting position of the drive motor 26 with respect to the bracket 23 is not particularly limited, but it is preferable that the drive motor 26 is disposed on the bracket 23 below the drive roller 24 as in the above-described embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Steel column, 8, 9 ... Cutting piece of support plate as object to be cut, 10 ... Gauge, 12 ... Upper support, 16 ... Lower support, 20 ... Guide rail, 21 ... Cutting unit, 22 ... Slider (Attachment body), 23 ... bracket (attachment body), 24 ... drive roller, 25 ... driven roller, 26 ... drive motor, 27 ... endless band saw, 33 ... positioning pin, 34 ... compression coil spring, 35, 36 ... positioning Hole: 39 ... Guide rod (guide member), 41 ... Guide cylinder (guide member), 42 ... Place for upper support, 51 ... Place for lower support, 59 ... Band support member for lower support ( Positioning part), 62a... Magnet, S.

Claims (7)

A cutting unit that can move in the vertical direction along the guide rail that extends vertically between the upper support and the lower support fixed to the column is movable in the vertical direction with respect to the guide rail. A supported mounting body, a driving roller supported by the mounting body, a driven roller and a driving motor, an endless band saw spanned between a driving roller and a driven roller rotated by the driving motor, and a guide rail A positioning pin that moves up and down together with the mounting body while being pressed by the elastic force of the spring ;
Each of the upper support and the lower support is attached to a mounting table that can set the distance of the endless band saw with respect to the column so as to be movable and adjustable in the direction of approaching and separating from the column,
By the dead weight of the cutting unit, the attachment body descends with respect to the guide rail together with the driving roller, the driving motor, the driven roller, and the endless band saw, and the object to be cut protruding from the column is cut with the endless band saw ,
The cutting machine, wherein the positioning pin is engaged with the positioning hole formed in the guide rail by the elastic force of the spring to prevent the cutting unit from descending . The cutting machine according to claim 1, wherein a mounting table is detachably attached to the upper support table and the lower support table. In a movement-permissible space provided between the upper support base and the lower support base, between the column and the guide rail, and on both sides of the guide rail in the left-right direction perpendicular to the moving direction of the mounting body, the guide rail The cutting machine according to claim 1 or 2, wherein a driving roller is provided on one side of the left and right sides of the motor, and a driven roller is provided on the other side. A driving roller disposed between the upper support base and the lower support base as a stopper for preventing a moving force generated when the workpiece is cut by the endless band saw, on one of the left and right sides of the guide rail. 4. The cutting machine according to claim 3, further comprising a guide member attached on the side to support the cutting unit so as to be movable in the vertical direction. The cutting machine according to claim 3 or 4, wherein a magnet attracted to the pillar on both the left and right sides with respect to the guide rail is attached to the lower support base so as to be swingable in a direction of approaching and separating from the pillar. . The lower support base is provided with a positioning portion that can be aligned with a mark of a gauge supported on the upper end of the workpiece protruding from the pillar when the upper support base and the lower support base are fixed to the pillar. The cutting machine according to any one of claims 1 to 5 , wherein the cutting machine is any one of claims 1 to 5 . The cutting machine according to any one of claims 1 to 6 , wherein a support member fixed to the column is provided separately on the lower support base.

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