JP3426272B2 - Sawing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sawing machine having a plurality of saw blades. 2. Description of the Related Art Conventionally, as a sawing machine, for example , Japanese Unexamined Patent Publication No.
No. 115116, No. 2-139017, Sho 6
As shown in 1-120420, etc., vertical and horizontal
There is a band saw machine. This type of sawing machine is configured to have a single endless band saw blade that is wound around the driving wheel and a driven wheel provided in the saw blade housing. The drive wheel of the band saw machine is rotated by a drive motor via a speed reducer. In addition, the band saw blade mounted on the band saw machine is replaced manually or by an automatic saw blade changing device that mechanically replaces the band saw blade stored in a magazine. [0003] In the above-mentioned conventional band saw machine, when the band saw blade is replaced by the saw blade replacing means, it takes much time to replace the band saw blade with any of the above-mentioned means. There was a problem. Further, the means for replacing the band saw blade by the automatic saw blade changing device requires a space for a magazine, and thus has a problem that a large space is required. An object of the present invention is to improve the above-mentioned problems by providing a sawing machine with a plurality of saw blades, and enabling a desired saw blade to be indexed to a processing position from the plurality of saw blades. Another object of the present invention is to provide a sawing machine in which the space is the same as that of the conventional machine, the time for replacing the saw blade is shortened, and the driving system is further simplified. [0005] In view of the above-mentioned conventional problems,
Thus, the present invention relates to a method for positioning a workpiece positioned at a cutting position.
Slide bracket provided movably in the cutting direction
To the axis perpendicular to the above-mentioned movement direction.
A rotatable column is provided rotatably mounted on the column.
The workpiece is cut into a plurality of housings
A saw blade for cutting is rotatably provided and
The jig is indexed above the cutting position and installed
And a first drive motor for rotating the column is
Install on the slide bracket and fix the column
A lock device for the slide bracket is provided,
Only with the saw blade indexed and positioned on the cutting position
A freely connectable output shaft can be freely rotated on the slide bracket.
And the second bracket attached to the slide bracket.
2 and the output shaft via a rotation transmitting member.
It is provided in conjunction . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention is applied to a horizontal band sawing machine.
The case as an example, be described in detail with reference to examples thereof to the drawings. In this embodiment, a band sawing machine is described as a sawing machine. However, the present invention is not limited to this type of machine and can be applied to, for example, a circular sawing machine . For easy understanding, first, the overall configuration of the band saw machine will be schematically described. Referring to FIG. 3, a band saw machine 1 has a plurality of (two in this embodiment) guide posts 5A, 5 on a base 3.
B is erected, and slide brackets 7A, 7B are mounted on the guide posts 5A, 5B so as to be vertically movable. A rectangular column 9 is rotatably mounted on the slide brackets 7A, 7B, and turret-type housings 11a, 11b, 11c, which protrude radially from each side of the column 9, are provided. 11d are provided on both sides of the column 9 with a predetermined gap. A drive wheel 13 is mounted on one side (the right side in FIG. 3) of the turret type housings 11a to 11d.
A driven wheel 15 is mounted on the other side (the left side in FIG. 3) of the driven wheels 13a to 11d.
A band saw blade 17 is wound around 5. A slide member 19 and a tension cylinder 21 are provided on the back side of the housings 11a, 11b, 11c and 11d on which the driven wheel 15 is mounted in order to apply tension to and loosen the band saw blade 17. A slide body 23 supporting the driven wheel 15 is slidably mounted in the slide member 19. In addition, the piston rod mounted on the tension cylinder 21 and the slide body 23 are connected. With the above configuration, the tension cylinder 21
Is operated to retract the piston rod, the driven wheel 15 moves to the opposite side of the driving wheel 13 via the slide body 23, and applies tension to the wound band saw blade 17.
Further, when the tension cylinder 21 is operated to cause the piston rod to protrude, the slide body 23 protrudes, and the driven wheel 15 moves to the drive wheel 13 side. For this reason, the tension of the band saw blade 17 is relaxed, and the saw blade can be replaced. The turret type housings 11a to 11
a drive-side guide bracket 27 that supports the rotary drive-side insert holder 25 in a space created in the left-right direction of d.
A moving-side guide bracket 31 that supports the rotary driven-side insert holder 29 is provided. The drive-side guide bracket 27 is fixed to the column 9, and the movable-side guide bracket 31 is provided on the column 9 so as to be movable in the left-right direction. A drive motor 33 for rotating the column 9 by 90 or 180 degrees is provided on the slide bracket 7A, and a positioning device (shown in the figure) for positioning the column 9 after rotation is provided on the slide bracket 7A. (Omitted). A drive motor 3 is used as a drive source for driving a drive wheel 13 mounted on turret type housings 11a to 11d protruding radially from the column 9.
5 is provided on the slide bracket 7A.
The rotation is transmitted from the drive motor 35 to the reduction gear 39 as a rotation transmission member via, for example, a timing belt 37. Although not shown, a driven member provided in the column 9 from the output shaft of the reduction gear 39 is omitted. The drive wheel 13 is driven to rotate via the rotation. In order to move the slide brackets 7A and 7B in the vertical direction along the guide posts 5A and 5B, a hydraulically operated swing cylinder 41 erected on the base 3 is provided with slide brackets 7A and 7B.
It is connected to. On the other hand, a fixed vice jaw 43 for gripping and fixing a work and a movable vice jaw 45 are provided on the base 3. The fixed vice jaw 43 is on the drive wheel 13 side,
That is, a moving vice jaw 45 is fixed on the base 3 on the right side in FIG. 3 and is opposed to the fixed vice jaw 43, and the hydraulically operated cylinder 47 provided on the base 3 is connected to the moving vice The movable vice jaw 45 and the fixed vice jaw 43 cooperate to hold and fix the work by the operation of the cylinder 47 by being connected to the jaw 45. Reference numeral 49 denotes a safety cover that covers rotating equipment. According to the above-described configuration, the desired cut portion of the work is positioned at the cutting position KK, and the movable vice jaw 45 is operated to cooperate with the fixed vice jaw 43 to hold and fix. Then, the turret type housings 11a to 11d including the driving wheel 13 on which the desired band saw blade 17 is wound and the driven wheel 15 are cut at the cutting position K.
-Drive the drive motor 33 on the K line to perform index positioning. In this case, the turret type housing 1
The column 9 to which 1a to 11d are fixed is a swing cylinder 4
By the operation of No. 1, it is located at the upper limit. Then, tension is applied to the driven wheel 15, which is a normal operation, and the band saw blade 17 is stretched.
The band saw blade 17 is formed by the rotary drive side insert holder 25 locked to the shaft and the rotary driven side insert holder 29 locked to the driven side guide bracket 31 set to a predetermined width.
To give a twist at a predetermined angle, for example, 90 degrees. Thereafter, the drive motor 35 is driven, the speed reducer 39 is rotated via the timing belt 37, and the rotation is transmitted to the driven member provided in the column 9 to rotate the drive wheel 13. The rotation of the driving wheel 13 causes the band saw blade 17 to travel, and the swing cylinder 41 is operated to lower the band saw blade 17, whereby the workpiece is cut. The conditions for replacing the band saw blade 17 are as follows: when cutting occurs, when the saw blade 17 approaches the end of its service life due to body breakage, chipping, or cut surface roughness of the band saw blade 17, cutting noise is high. When noise is generated, when the appropriate saw blade is automatically selected for each workpiece, or when the appropriate saw blade is automatically selected for each size of the workpiece. When the saw blade replacement condition as described above occurs, the band saw blade 17 is replaced. After the cutting process is completed, it is confirmed that the column 9 has been raised to the upper limit, and then the positioning device (not shown) is positioned. Remove the pin and drive motor 3
3 is driven. Then, one of the turret type housings 11a to 11d around which the desired band saw blade 17
In order to position one on the cutting processing line KK, the column 9 can be rotated 90 degrees or 180 degrees, and the column 9 can be fixed by the positioning pins of the positioning device to perform the cutting processing. Thus, the time required for replacing the saw blade can be significantly reduced as compared with the band sawing machine conventionally used. A driving device for rotating the driving wheel 13 will be described in more detail. Referring to FIGS. 1 and 2, the drive device 51 for rotating the drive wheel 13 has the slide bracket 7A mounted on the guide post 5A as described above, and the drive motor 35 is fixed to the slide bracket 7A. Have been. A drive pulley 55 is fixed to an output shaft 53 of the drive motor 35. On the other hand, a driven pulley 57 which is a member of the speed reducer 39 is rotatably supported via bearings 61 and 63 on a casing 59 integrally provided with bolts or the like on the slide bracket 7A. The gear 65 is fixed to the input shaft 67 of the gear 65. The drive pulley 55 and the driven pulley 57 have, for example, a timing belt 37 as a rotation transmission member. The gear 65, which is a member of the speed reducer 39, is engaged with a gear 69, and the gear 69 is fixed to an output shaft 71 extending in the left-right direction in FIG. This output shaft 71 is supported by the casing 59,
One side (left side in FIG. 1) of the output shaft 71 is a casing 5
9 is slidably supported via a bush 73, and the other side (the right side in FIG. 1) is rotatably supported by a bearing case 77 via a bearing 75. The bearing case 77 is slidably mounted in the right and left directions in a hole 81 of an end plate 79 integrally fixed to the casing 59 with bolts or the like. A fluid pressure operated cylinder chamber 83 is formed in the end plate 79, and the tip of a piston rod 87 provided integrally with a piston 85 moving in the cylinder chamber 83 in the left-right direction is integrated with the bearing case 77. Are screwed together. Reference numerals 89 and 91 are supply / discharge connection ports connected to a fluid pressure generation source, although not shown. With the above configuration, when the drive motor 35 is driven, the drive pulley 55 rotates, and the driven pulley 57 rotates via the timing belt 37. Driven pulley 5
The rotation of the gear 7 rotates the gear 65, transmitting the rotation to the gear 69 meshed with the gear 65, and the output shaft 71 with the gear 69 engaged rotates. On the other hand, when the pressurized fluid is supplied to the cylinder chamber 83 from the connection port 89, the piston 85 moves to the left in FIG.
7. The output shaft 71 can be moved to the left via the bearing 75. The connection port 9 of the cylinder chamber 83
When the pressure fluid is supplied from the first side, the output shaft 71 moves rightward. A drive member, for example, a bevel gear 93 is fixed to one end (the left side in FIG. 1) of the output shaft 71. A cylindrical shaft 95 formed at one end of the column 9 is rotatably mounted on the slide bracket 7A. Although not shown, the slide bracket 7B is not shown.
A cylindrical shaft 95 at the other end of the column 9 is also rotatably mounted on the side, and the column 9 includes slide brackets 7A and 7B.
And are rotatably supported. On the driving side (right side in FIG. 1) of the square column 9, as shown in FIG. 2, the bevel gears 97a, 97a,
97 b, 97 c and 97 d are rotatably supported via bearings 99 facing the center of the column 9. The center of the output shaft 71 to which the bevel gear 93 is fixed so that the bevel gear 97a and the bevel gear 93 can mesh with each other is a predetermined amount (from the center of the column 9 as shown in FIG. 2). L dimension) eccentric, the output shaft 71 is
It is provided in. The bearings 99 are mounted on bearing cases 101a, 101b, 101c and 101d, and the bearing cases 101a to 101d are integrally provided on the column 9 by bolts or the like. The bevel gears 97a to 97 mounted on the column 9
The drive sprockets 105a, 105b, 105c,
105d are respectively fixed. On the other hand, the turret-type housings 11a, 11
A drive wheel 13 is mounted on each of b, 11c and 11d. Although FIG. 2 shows only the drive wheel 13 mounted on the turret type housing 11a as a representative, other turret type housings 11b to 11d have the same configuration and are omitted. The detailed configuration is as follows. Turret type housings 11a to 11d are integrally fixed to each side of the column 9 with bolts 107, and the turret type housing 1
Shafts 109a to 109d are inserted through 1a to 11d and fixed by nut members 111. This axis 1
The drive wheel 13 is rotatably supported by 09a to 109d via a bearing 113. Further, the driving wheel 13 has driven sprockets 115a, 115b, 1
15c and 115d are coaxially fixed by bolts or the like, and an endless chain 117 is wound around the driven sprockets 115a to 115d and the driving sprockets 105a to 105d. With the above configuration, the output shaft 71 provided with the bevel gear 93 which is a member of the above-described reduction gear 39.
The pressure fluid is supplied through the connection port 89 of the cylinder chamber 83, and the bevel gear 93 is shifted to the position shown by the solid line in FIG. In this state, the bevel gear 9
3 meshes with the bevel gear 97a provided on the column 9 side. When the bevel gear 93 and the bevel gear 97a mesh with each other, the power is transmitted to rotate the drive sprocket 105a provided on the bevel gear 97a, and the driven sprocket 11
5a is rotated. Since the driven sprocket 115a is connected to the driving wheel 13, the driving wheel 13 rotates, and the band saw blade 17 wrapped around the driving wheel 13 travels to start cutting. In order to release the engagement between the bevel gear 93 and the bevel gear 97a, a pressurized fluid is supplied from the connection port 91 of the cylinder chamber 83 to retract the piston 85, and the two-dot chain line in FIG. When the bevel gear 93 is shifted to the position shown, the meshing can be released, and the bevel gears 97a to 97d provided in the column 9 can be released.
Everything is free from the bevel gear 93. The turret type housings 11a to 11
As a mechanism for rotating the column 9 provided with d, a drive motor 33 (not shown) (not shown) is provided on the slide bracket 7A, and is attached to the output shaft of the drive motor 33. Driven sprocket 121 via a chain 119 from a driven sprocket (not shown)
The rotation is transmitted to. This driven sprocket 121
The column 9 is fixed to a flange 123 provided on the shaft 95 by bolts 125. With the above configuration, as described above, bevel gear 9
3 is separated from the bevel gears 97a to 97d provided in the column 9 and then the drive motor 33 is driven to drive the chain 11
9, the driven sprocket 121 is rotated. When the driven sprocket 121 rotates, the column 9 rotates, and the column 9 rotates 90 degrees or 180 degrees, and the turret-type housing 11 on which the desired band saw blade 17 is mounted.
One of a to 11d is positioned on the cutting processing position KK line. As described above, the lock device 127 is provided on the slide bracket 7A so that the column 9 does not move when the desired band saw blade 17 is positioned on the cutting position KK. That is, the locking device 129
For example, a fluid-operated cylinder 1
29 is fixed to the slide bracket 7A,
The tip of the piston rod 131 of the cylinder 129 is
The column 9 is inserted into one of a plurality of engagement holes 133 provided in a flange portion 123 provided on the shaft portion 97 of the column 9. In addition,
Each of the engagement holes 133 is formed at a radial position by dividing the circumference into four equal parts. With the above configuration, when the desired band saw blade 17 is positioned on the cutting position KK, the cylinder 1
29, and by inserting the tip of the piston rod 131 into the engagement hole 133 provided in the flange portion 123,
The column 9 is locked and cannot move. According to the above-described configuration, the output shaft 71 is rotated by the single drive motor 35 via the speed reducer 39, and the bevel gear 93 locked to the output shaft 71 and the driven member provided in the column 9 are provided. Bevel gears 97a to 97
For example, a desired bevel gear d is engaged with or separated from the bevel gear 97a. Then, for example, the bevel gear 97a and the bevel gear 93 are meshed with each other, the bevel gear 97a is rotated, the drive wheel 13 is driven, and the band saw blade 17 is caused to travel, thereby performing cutting. When replacing the saw blade, for example, the meshing between the bevel gear 97a and the bevel gear 93 is released, the lock device 127 is released, and the drive motor 33 is driven, so that the desired band saw blade 17 is driven. The mounted turret type housing 11 is indexed and positioned on the cutting processing position line KK. Then, for example, the bevel gear 97b and the bevel gear 93 are meshed again, and after being locked by the lock device 127, the drive motor 35 is driven to rotate the drive wheel 13, and the cutting operation is performed by the new band saw blade 17. Even in the band saw machine 1 provided with a plurality of (four in this embodiment) band saw blades 17, the driving source may be one drive motor 35 and one set of reduction gear 39, so that the conventional The cost of the driving source for the band sawing machine of the single machine can be substantially the same as that of the conventional machine, the space can be substantially the same as that of the conventional machine, and the replacement time of the band saw blade 17 can be reduced. FIG. 4 shows another embodiment which is an alternative to FIG. 4, the same components as those in FIG. 1 are denoted by the same reference numerals, detailed description is omitted, and only different configurations will be described. That is, in FIG. 4, the column 9 is attached to the slide bracket 7A by 90 degrees or 180 degrees.
A drive motor 51 for rotating the column 9 is provided, and a positioning device 53 for performing positioning after the rotation of the column 9 is provided on the slide bracket 7B side. In the positioning device 53, for example, a shot pin device 57 is provided on a support portion 55 projecting from the slide bracket 7B. Since the shot pin device 57 has a known structure, detailed illustration and explanation are omitted, but pins are inserted and removed by a fluid cylinder or the like, and the pins are engaged with the column 9 to perform positioning. Configuration. As a driving source for driving the driving wheel 13 mounted on the turret type housings 11a to 11d protruding radially from the column 9, for example, a driving motor 5
9 is provided on the slide bracket 7A. Although not shown, the rotation is transmitted from the drive motor 59 to the reduction gear via a timing belt 61 or the like as a rotation transmission member, and the drive wheel is output from the output shaft of the reduction gear via a clutch member (not shown). 13 is driven to rotate. As described above, in FIG. 4, the operation and effect are almost the same, except that the positioning mechanism for rotating the column 9 and the mechanism provided with the drive motors 51 and 59 are slightly different from those of the above-described embodiment. Therefore, the description is omitted. The present invention is not limited to the embodiment described above, but can be embodied in other modes by making appropriate changes. For example, in this embodiment, the cylinder 129 is employed as the lock device 127, but the positioning pin may be operated via a screw by a motor. As is clear from the above description,
In the present invention, a saw blade for cutting a workpiece is provided.
Having a plurality of housings 11a to 11d radially
The ram 9 cuts the work positioned at the cutting position
To slide brackets that can be moved in any direction
It is freely attached. Then, the column 9 is rotated.
Motor 33 for fixing the column 9
Lock device 127 is attached to the slide bracket.
And the drive attached to the slide bracket
The output shaft 71 rotated by the motor 35 is rotatable.
The output shaft 71 is indexed on the cutting position.
It can be connected only to the positioned saw blade. Accordingly
According to the present invention, the indexing position is set on the cutting position.
When the saw blade is connected to the output shaft 71 and the saw blade is rotated,
Move the slide bracket in both directions to cut the workpiece.
Moving the workpiece at the cutting position.
It can be. At this time, the column 9 is a lock device
It rotates around the axis because it is fixed by 127
There is no such thing. That is, according to the present invention,
For example, a structure with multiple saw blades that can be indexed to the cutting position
Even if it is formed, only the saw blade indexed to the cutting position
Rotation is transmitted, in other words, during indexing
It impossible to transmit rotation to the saw blade
Saw blades not indexed to the cutting position
The saw blade is driven to rotate during indexing
Safety can be improved without any unexpected accidents, etc.
Things. In addition, it has a configuration with a plurality of saw blades,
Only for saw blades indexed to the cutting position.
It is sufficient to provide the output shaft 71 at a corresponding position.
Therefore, only one rotation transmission system from the drive motor 35 is required.
The configuration of the transmission system is simplified .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a driving device as a main part of the present invention, and FIG.
It is an expanded sectional view of the I arrow view part in. FIG. 2 is an enlarged sectional view taken along line II-II in FIG. FIG. 3 is an explanatory perspective view of a band saw machine according to an embodiment of the present invention; FIG. 4 is an explanatory perspective view of a band saw machine according to another embodiment instead of FIG. 3; [Description of Signs] 1 band saw machine (saw machine) 9 columns 11a to 11d turret type housing 17 band saw blade (saw blade) 35 drive motor (drive source) 39 reduction gear drive 51 drive device 71 output shaft 93 bevel gear (drive member) 97a-97d Bevel gear (driven member) KK line Cutting position

Claims (1)

(57) [Claims] [Claim 1] The work positioned at the cutting position is
Slide bracket provided movably in the cutting direction
(7A, 7B), a direction orthogonal to the moving direction
Rotatable column (9) rotatable around the axis
The column (9) is provided with a plurality of
The work is cut into a housing (11a to 11d).
Blades are provided rotatably and the housings
(11a-11d) indexing position above the cutting position
And a second one for rotating the column (9).
1 drive motor (33) is connected to the slide bracket (7
A, 7B) and fix the column (9)
Locking device (127) for the slide bracket
(7A, 7B), indexing position above the cutting position
In front of the output shaft (71) that can be connected only to the fixed saw blade
Provided rotatable on the slide brackets (7A, 7B)
And mounted on the slide brackets (7A, 7B).
The second drive motor (35) attached and the output shaft (71)
And interlocked via a rotation transmitting member.
Sawing machine .