JP3426268B2 - Band saw blade guide device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band saw blade guide device, and more particularly, to a band saw blade which is not twisted when a band saw blade is replaced, but is fixed only when cutting. The present invention relates to a band saw blade guide device that can be twisted in a direction. 2. Description of the Related Art Conventionally, there is a type in which a saw blade is not twisted at all like some sawing machines, but usually, a band saw blade in a band sawing machine is twisted by about 45 to 90 degrees when cutting. It is common to use. Therefore, if the band saw blade is twisted and mounted simply on two wheels, it can be mounted relatively easily. However, in the type in which the band saw blade is twisted and cut, the band saw blade is mounted when the band saw blade is mounted. Twisting is a problem. For this reason, the band saw blade is generally mounted by moving one of the two wheels (usually a driven wheel) to the other (usually a driving wheel). That is, first, the band saw blade is hung on two wheels without tension, and the band saw blade is inserted into the two saw blade guides to fix the saw blade guide. However, if the band saw blade is twisted without tension as described above, the band saw blade may come off the wheel. For this reason, when applying the tension while slowly moving the one wheel away from the other wheel, it is necessary to carefully move the wheels while confirming that the bandsaw blades are correctly applied to both wheels. It is a laborious work. Conventionally, there has been a jig for fixing the band saw blade to the wheel, but since it is not perfect, careful work is required and it is troublesome. In particular, in the case of a large-sized machine, two workers were required to perform a difficult and speedy operation because the distance between the wheels was long in order to check the degree of engagement of the band saw blade. SUMMARY OF THE INVENTION An object of the present invention has been made in view of such a conventional technique, and makes it easy to replace the band saw blade and to easily and quickly mount the band saw blade. To provide a guidance device. SUMMARY OF THE INVENTION The present invention is based on the foregoing
It has been made in view of the problems of
Twist the band saw blade wound around the moving wheel in the cutting direction.
In the band saw blade guide device that guides in the raised state,
Fixed part provided between the driving wheel and the driven wheel
A rotating guide having a slit into which the band saw blade can be inserted.
The drive is provided rotatably, and the drive is
The band saw blade wound around the moving wheel and the driven wheel
Opening the slit so that it can be inserted into the slit,
Mounted on the drive wheel and the driven wheel
Rotationally positionable so that it points in the mounting direction of the band saw blade
Provided and twisted by the rotation of the rotation guide
Pair of inserts to guide the band saw blade in the locked state
And a pair of twist-raising rollers that can be opened and closed freely
Part is retracted from the position for guiding the band saw blade and the band saw blade.
And the movable portion is provided on the fixing portion . A preferred embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 5 and 6, for example, a horizontal band sawing machine 1 as a band sawing machine is composed of a box-shaped base B and a cutting head 3 and the like. To the base B so as to be able to move up and down. On the upper portion of the base B, there is provided a work table 9 provided with a number of rollers 7 for movably mounting the work W. The work table 9 is provided with a main body capable of holding and fixing the work W. Vise 11 and material feed vise 13
Is provided. The main body vise 11 and the material vise 1
3 is a fixed vise zipper 11F, 13F, a movable vise zip 1
1M, 13M, fixed vise 11F, 13F
The workpiece W is clamped or unclamped by operating the movable vise jaws 11M and 13M with fluid cylinders. The cutting head 3 is provided with housing portions 15 and 17 spaced apart on both sides, and each of the housing portions 15 and 17 is provided with a beam member 21 having a control device 19.
Are linked by Housing section 1 of cutting head 3
A drive wheel 23 and a driven wheel 25 are mounted on shafts 5 and 17 via shafts 27 and 29, respectively. An endless band saw blade BS is wound around the drive wheel 23 and the driven wheel 25. Therefore, the band saw blade BS is driven to run to cut the work W by driving the drive wheel 23. The beam member 21 has a band saw blade guiding device 3
1 is provided. Although the details of the guide device 31 will be described later, a fixed guide 33 and a movable guide 35 are mounted.
Thus, in the cutting region where the band saw blade BS cuts the workpiece W, the band saw blade BS is guided and supported in a state where the tooth tip of the band saw blade BS is twisted so as to face vertically downward. The fixed guide 33 is fixedly attached to the beam member 21 corresponding to the reference vise position of the main body vise 11 and the material feeding vise 13. It is mounted so that its position can be adjusted to correspond to the size of the work W. The cutting head 3 is configured to rotate up and down around a hinge pin 5 by a lifting cylinder 37. The action of the lifting cylinder 37 controls the cutting and lifting of the band saw blade BS with respect to the work W. Can be done. A drive motor (not shown) is connected to a shaft 27 of the drive wheel 23 in an interlocked manner. A shaft 29 of the driven wheel 25 is connected to a tension cylinder (a tension applying device for adjusting the tension of the band saw blade BS). (Not shown). With the above configuration, a tension cylinder (not shown) separates the driven wheel 25 from the driving wheel 23 in a state where the band saw blade BS is wound around the driving wheel 23 and the driven wheel 25, so that the band saw blade BS is A predetermined tension will be applied. Then, a drive motor (not shown) rotates the drive wheel 23 to drive the band saw blade BS to travel, and the work W is cut. Next, a band saw blade BS will be described with reference to FIGS.
The band saw blade guide device 31 will be described. Band saw blade guide device 31
Since the fixed-side guide 33 and the movable-side guide 35 have the same structure, the movable-side guide 35 will be described below. The movable guide 35 is movable in the width direction of the beam member 21, but is provided with a fixed portion 39 fixedly mounted in the vertical direction and a movable portion in the vertical direction with respect to the fixed portion 39. The moving unit 41 is configured. A first cylinder 43 and a second cylinder 45 are provided on the upper inside of the fixed portion 39.
A vertically extending guide block 47 is fixed to the fixing portion 39 by bolts 49. At the lower end of the guide block 47, a circular rotary guide 51 as a saw blade twisting means is rotatably mounted. Inside the guide block 47, a piston rod 55 connected to the piston 53 of the second cylinder 45 is provided so as to be movable up and down, and the lower end of the piston rod 55 is provided to the rotation guide 51. The pin 57 is movably attached to the elongated hole 61.
Therefore, as the piston rod 55 moves up and down,
While rotating, the rotation guide 51 can be rotated. [0027] rotation guide 51, the band saw blade BS Do back
Slits 63 are al inserted is provided in the diametrical direction (in FIG. 3 the vertical direction). A wide opening is provided at the entrance of the slit 63 so that the band saw blade BS can be easily inserted. Since the pin 57 is mounted at a position off the center of the rotation guide 51, the second cylinder 45 is driven to move the piston rod 55 up and down,
The rotation guide 51 rotates via the pin 57. The rotation guide 51 shown in the drawing is rotated by a desired twist angle by driving the second cylinder 45. On the other hand, the moving part 41 is connected to the first cylinder 43 via a piston rod 65. The left end of the moving portion 41 in the figure is slidably locked in the vertical direction with respect to the guide block 47, and the moving portion 41 is dropped from the guide block 47 by the dovetail guides 67 and 69. Has been prevented. Therefore, the moving unit 4
1 is vertically movable by driving the first cylinder 43. Lock cylinders 71, 71 for securely fixing the moving unit 41 to the guide block 47 are provided at the upper and lower portions inside the moving unit 41. A pair of inserts 73 is provided at the lower end of the moving unit 41 to open and close the band saw blade BS so as to guide the band saw blade BS.
5, 77 are provided rotatably. The insert 73 and the twisting rollers 75 and 77 can be closed by a drive device (not shown), and can approach and separate from each other. The saw blade guiding device 31 constructed as described above
The operation of attaching the band saw blade BS to the band sawing machine 1 provided with is described. First, the driven wheel 25 is moved to the drive wheel 23 side by a tension cylinder (not shown). By moving the first cylinder 43 to raise the piston rod 65, the moving section 41 is moved upward (upward in the figure) from the cutting position. And
By operating the second cylinder 45 to lower the piston rod 55, the band saw blade BS in a state where the slit 63 of the rotation guide 51 does not twist is driven by the driving wheel 23 and the driven wheel 23.
It is rotationally positioned so as to face the mounting direction (horizontal direction in FIG. 1) mounted on the wheel 25 . [0032] In this state, the drive wheel 23 and driven wheel 25, to wind the band saw blade BS state without twist
The rewritable attached to so that the slit 6 of the rotary guide 51
The band saw blade BS is inserted into 3, and the driven wheel 25 is moved from the drive wheel 23 by a tension cylinder to apply tension to the band saw blade BS. Next, after tension is applied to the band saw blade BS, the second cylinder 45 is operated to move the piston rod 55
To rotate the rotation guide 51 by a desired twist angle. Thereby, the band saw blade BS is how incision edge
The Nihi batter cause state to direct the direction. The insert 73 of the moving portion 41 which is retracted and raised from the band saw blade BS is opened by a known means, and the twisting rollers 75 and 77 are separated from each other to widen the interval. In this state, the first cylinder 43
Is operated to lower the piston rod 65, thereby lowering the moving part 41. Thereby, the insert 7
The band saw blade BS in a twisting state is inserted between the three and between the twisting rollers 75 and 77. In this state, the lock cylinder 71 is operated to fix the moving portion 41 to the guide block 47. Then, while closing the insert 73,
The twisting rollers 75 and 77 are brought close to each other, and the mounting of the band saw blade BS is completed. As described above, the band saw blade BS in a non-twisted state is mounted on the drive wheel 23 and the driven wheel 25, and the driven wheel 25 is moved to apply tension to the band saw blade BS. Drive blade BS
It can be wound around a moving wheel 23 and a driven wheel 25 . And after attaching the band saw blade BS, the band saw blade BS
, The band saw blade BS does not fall off from the drive wheel 23 and the driven wheel 25 during the twisting. In the above embodiment, the horizontal band saw machine 1 has been described. However, the present invention can be applied to a vertical band saw machine. In the above embodiment, the rotation guide 51 is rotated by the second cylinder 45. However, the present invention is not limited to this. That is, the same operation and effect can be obtained even when the drive motor is used to rotate the rack and pinion, the worm gear, the cam, or the like. Further, in the above embodiment, the moving unit 4
1, the band saw blade BS is wound around. However, as shown in FIG. 4, the insert 73 and the twisting rollers 75, 77 are not retracted upward.
For example, the same operation and effect can be obtained even if the opening and closing can be performed by a driving means such as a hydraulic cylinder. Rotation guide 51 of the saw blade twisting means
The rotation of the band saw blade BS may be simultaneously performed when tension is applied to the band saw blade BS in a state where the band saw blade BS does not come off from the driving wheel 23 and the driven wheel 25. The above description of the embodiment makes it clearer.
As described above, in the present invention, the saw in the twisted state is used.
A pair of inserts 73 and one for guiding the blade BS
A pair of twist raising rollers 75 and 77 are provided so as to be freely opened and closed.
The moving part 41 is provided with a position for guiding the band saw blade BS and the band saw blade B.
S can be moved to the retracted position, and the band saw blade BS can be inserted.
The rotation guide 51 with the slit 63 that can be inserted is
To the drive wheel 23 and the driven wheel 25
The band saw blade BS to be wound can be inserted into the slit 63.
As described above, the opening of the slit 63 is
3 and the mounting direction of the band saw blade BS to the driven wheel 25
Are provided so as to be rotatable and positionable . Therefore, according to the present invention, the drive wheel
The band saw blade BS around the tool 23 and the driven wheel 25
It is not necessary to twist the band saw blade BS when mounting it
And a pair of inserts 73, twisting roller 7
5,77 is not in the way, the band saw blade BS
It can be easily mounted. And band saw blade BS
After mounting the belt, rotate the rotation guide 51 to
The saw blade BS can be twisted, and the band saw blade BS can be twisted.
After rising, guide the moving part 41 and the band saw blade BS.
By moving to a position where
The pair of inserts 73 and the pair of twist raising rollers 7
5,77 . [0043]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an embodiment of a band saw blade guide device according to the present invention, showing a state in which the band saw blade is twisted. FIG. 2 is a sectional view taken along the line II-II in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 1; FIG. 4 is a side view corresponding to FIG. 3, showing another embodiment of the band saw blade guide device according to the present invention. FIG. 5 is a front view showing the entire band saw machine. FIG. 6 is a plan view of FIG. [Description of Signs] 1 Band saw blade 23 Drive wheel 25 Follower wheel 31 Band saw blade guide device 51 Rotation guide (twisting means) 73 Insert (guide) 75, 77 Twisting roller (guide)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B23D 55/00-55/08 B27B 13/10

Claims (1)

(57) Claims 1. A drive wheel (23) and a driven wheel
Insert the band saw blade (BS) wound in (25) in the cutting direction
Band saw blade guide device that guides in a twisted state
And the driving wheel (23) and the driven wheel (25)
The band saw blade (BS) is attached to a fixing portion (39) provided between
Guide (5) provided with a slit (63) into which
1) is provided rotatably, and the
Wound around drive wheel (23) and driven wheel (25)
Band saw blade (BS) can be inserted into the slit (63)
Drive the opening of the slit (63)
Mounting for the wheel (23) and the driven wheel (25).
Turn it so that it faces the mounting direction of the band saw blade (BS) to be mounted.
The rotation guide (51) is provided so as to be freely rotatable.
Band saw blade (BS) twisted by rotation
A pair of inserts (73) for guiding and a pair of
Twist-raising rollers (75, 77) are provided for opening and closing freely.
The moving part (41) is positioned to guide the band saw blade (BS).
And can be moved to a position retracted from the band saw blade (BS).
A band saw blade guide device provided on a fixing portion (39).
Place .