JP3884109B2 - Saw blade centering method and apparatus in band saw machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw blade centering method and apparatus for a band saw machine, and in particular, to adjust the tension of a band saw blade that is rotatably wound around a drive wheel and a driven wheel linked to a saw blade motor in the band saw machine. The present invention relates to a saw blade centering method and an apparatus for adjusting the misalignment of the band saw blade that occurs when performing the above operation.
[0002]
[Prior art]
Conventionally, in a band saw machine, as shown in FIGS. 4 and 5, a band saw blade B is wound around a drive wheel 101 and a driven wheel 103 so that the driven wheel 103 is mounted on a wheel shaft 105 (support shaft). The wheel shaft 105 is supported at one end, and the other end of the wheel shaft 105 is fixed to a shaft support 111 slidably provided in a guide groove 109 (FIG. 5) of the tension body 107.
[0003]
One end side of the tension body 107 is swingably supported on the wall surface of the saw blade housing 113, and a push screw 115 is supported on the other end side of the tension body 107 substantially parallel to the wheel shaft 105. The tip is screwed into the wall surface of the saw blade housing 113.
[0004]
A tension screw 117 is supported on one end side of the tension body 107 in a direction substantially parallel to the rotational core of the band saw blade B, and the shaft support 111 is screwed onto the tip of the tension screw 117. ing. By rotating the tension screw 117, the shaft support 111 is moved and adjusted in the direction in which the band saw blade B wound around the driven wheel 103 and the drive wheel 101 is pulled or loosened.
[0005]
That is, by rotating the tension screw 117 and pulling the shaft support 111, the wheel shaft 105 of the driven wheel 103 is moved in the direction opposite to the drive wheel 101 side, and the tension of the band saw blade B is adjusted. At this time, since the wheel shaft 105 of the driven wheel 103 is inclined, the driven wheel 103 is inclined, and as a result, the center of the rotating surface of the band saw blade B is shifted.
[0006]
In order to center the band saw blade B, the angle of the tension body 107 with respect to the wall surface of the saw blade housing 113 is adjusted by rotating the push screw 115, and as a result, the wheel fixed to the shaft support 111. The inclination of the shaft 105 is adjusted, the cores of the rotational surfaces of the driven wheel 103 and the drive wheel 101 are in the same position, and the core of the band saw blade B is adjusted.
[0007]
[Problems to be solved by the invention]
By the way, in the saw blade centering device in the conventional band saw machine, the number of parts is increased because the tension body 107 is provided swingably on the saw blade housing 113, the push screw 115 is provided on the tension body 107, and the like. There is a problem that the cost increases due to the increase in the number of parts and the assembly time.
[0008]
In addition, by adjusting the inclination of the tension shaft 107 with the push screw 115, the inclination of the wheel shaft 105 is indirectly adjusted to adjust the inclination of the driven wheel 103, thereby centering the band saw blade. There was a problem that it was difficult to adjust the centering.
[0009]
The present invention has been made to solve the above-mentioned problems, and its purpose is to adjust the inclination of the driven wheel by directly tilting the wheel shaft on which the driven wheel is mounted, and to center the band saw blade. An object is to provide an easy and inexpensive saw blade centering device.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the saw blade centering method in the band saw machine of the present invention according to claim 1 adjusts the tension of the band saw blade wound around the drive wheel and the driven wheel provided in the saw blade housing. In order to adjust the misalignment of the band saw blade occurring in the wheel, the driven wheel is attached to one end side of the wheel shaft, and the other end side of the wheel shaft is attached to the saw blade housing via a shaft support, The support body is moved in the longitudinal direction of the band saw blade and the other end side of the shaft wheel is swung in the longitudinal direction of the band saw blade to adjust the inclination of the shaft wheel.
[0011]
A saw blade centering device in a band saw machine according to a second aspect of the present invention comprises a drive wheel and a saw blade housing rotatably supporting a band saw blade wound around a driven wheel, and the driven wheel is mounted on a wheel shaft. The other end of the wheel shaft is supported by a shaft support and the shaft support is moved and adjusted in the longitudinal direction of the band saw blade to adjust the tension of the band saw blade to the saw blade housing. The wheel shaft is pivotally supported on the shaft support so as to be swingable, and the other end of the wheel shaft is positioned and adjusted to adjust the tilt of the swingable wheel shaft. It is characterized by being provided freely.
[0012]
Accordingly, in claims 1 and 2, the wheel shaft supported by the shaft support by moving the shaft support in the longitudinal direction of the band saw blade and the driven wheel supported by the wheel shaft move in the left-right direction. The tension of the band saw blade wound around the drive wheel and the driven wheel is adjusted.
[0013]
At this time, since the wheel shaft is loaded, the wheel shaft is tilted, so that the driven wheel is misaligned. However, a part of the wheel shaft in the longitudinal direction is partially supported by the shaft support. The other end of the wheel shaft can swing. Since the inclination of the wheel shaft is directly adjusted by moving and adjusting the other end portion of the wheel shaft in the longitudinal direction of the band saw blade, the inclination of the driven wheel is easily adjusted.
[0014]
According to a third aspect of the present invention, there is provided a saw blade centering device according to the third aspect of the present invention, wherein the center of the both ends of the wheel shaft is supported near the end of the shaft support on the driven wheel side, The other end of the wheel shaft is provided in the longitudinal direction of the band saw blade so as to be positioned and adjustable with a push bolt.
[0015]
Accordingly, since the vicinity of the center of the wheel shaft is supported by the shaft support and both end sides of the wheel shaft are swingable in the longitudinal direction of the band saw blade by the push bolt, the inclination of the longitudinal direction of the band saw blade of the wheel shaft Is easily adjusted, and as a result, the misalignment of the driven wheel is efficiently corrected.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a saw blade centering method and an apparatus therefor according to the present invention will now be described with reference to the drawings, taking a general horizontal band saw as an example.
[0017]
Referring to FIG. 3, for example, a horizontal band saw 1 as a band saw according to the example of the present embodiment includes a box-shaped base 3 and a saw blade housing 5. The saw blade housing 5 is horizontal. It is pivotally supported on the base 3 via a hinge pin 7 so as to be movable up and down.
[0018]
A work table 9 on which the work W is placed is provided on the base 3. The work table 9 includes a fixed vise jaw 11 f and a movable vise jaw 11 m that can hold and fix the work W. A device 13 is provided.
[0019]
The saw blade housing 5 is provided with housing parts 15 and 17 spaced apart on both sides, and the housing parts 15 and 17 are connected by a beam member 21 having an upper control box 19.
[0020]
The housing portions 15 and 17 of the saw blade housing 5 are provided with a drive wheel 23 and a driven wheel 25 via shafts 27 and 29, respectively, and an endless band saw blade B is wound around the drive wheel 23 and the driven wheel 25. It has been turned. Therefore, the band saw blade B is driven to run to cut the workpiece W by driving the drive wheel 23.
[0021]
A fixed guide member 33 and a movable guide member 35 are mounted on the guide member 31 fixed to the beam member 21, and the band saw blade B cuts the workpiece W by the fixed guide member 33 and the movable guide member 35. In the cutting region, the band saw blade B is guided and supported so that the cutting edge portion of the band saw blade B faces vertically downward. The fixed guide member 33 is fixedly attached to the guide member 31, and the movable guide member 35 is attached so as to be adjustable in position so as to correspond to the size of the workpiece W.
[0022]
The saw blade housing 5 is configured to be moved up and down around a hinge pin 7 by a lifting cylinder 39 having a piston rod 37. By the action of the lifting cylinder 39, the band saw blade B is cut into the workpiece W, It is possible to control the rise and separation.
[0023]
An endless band saw blade B is wound around the drive wheel 23 and the driven wheel 25, and a saw blade motor (not shown) is linked to the shaft 27 of the drive wheel 23.
[0024]
With the above configuration, when the saw blade motor is driven, the drive wheel 23 is rotated via the shaft 27, so that the band saw blade B wound around the drive wheel 23 and the driven wheel 25 is driven to travel.
[0025]
Since the saw blade housing 5 is moved up and down around the hinge pin 7 by the action of the lifting cylinder 39, the lift position of the band saw blade B can detect the rotation angle of the hinge pin 7 with, for example, an encoder. Since it is publicly known, detailed description is omitted.
[0026]
Referring to FIG. 1, a saw blade centering device 41 according to an example of the present embodiment will be described. A driven wheel 25 is supported on one end of a wheel shaft 43 (support shaft) via a bearing 45, and the wheel shaft The other end of 43 is mounted on a shaft support 47, and this shaft support 47 is slidably provided in a guide groove 49 provided in the saw blade housing 5. In other words, the shaft support 47 is movable in both directions of tensioning and loosening the band saw blade B wound around the driven wheel 25 and the drive wheel 23 (hereinafter referred to as “left-right direction”).
[0027]
In front of the moving direction of the shaft support 47, a tension screw 51 is supported by a bracket (not shown) protruding from the saw blade housing 5 in the left-right direction, and the shaft support 47 described above is attached to the tip of the tension screw 51. It is screwed.
[0028]
By rotating the tension screw 51, the band saw blade B wound around the driven wheel 25 and the drive wheel 23 is moved and adjusted in a pulling direction or a loosening direction. That is, by rotating the tension screw 51 and pulling the shaft support 47, the wheel shaft 43 of the driven wheel 25 is moved in the direction opposite to the drive wheel 23 side with the movement of the shaft support 47, and the tension of the band saw blade B Is adjusted.
[0029]
The wheel shaft 43 is provided with a large-diameter base 53 having a constant width at substantially the center thereof, and both ends of the wheel shaft 43 are formed by a driven wheel mounting portion 55 and a shaft fixing portion 57 having a smaller diameter than the base 53.
[0030]
The shaft support 47 is formed with a shaft insertion hole 59 into which the shaft fixing portion 57 of the wheel shaft 43 can be inserted through a gap, and the opening on the driven wheel 25 side of the shaft insertion hole 59 (FIG. 1). A shaft support hole 61 into which the base 53 of the wheel shaft 43 can be inserted is formed in a lower part of the shaft insertion hole 59 on the paper surface.
[0031]
Further, in the upper part of the shaft insertion hole 59 in FIG. 1, there is a long hole-shaped shaft positioning guide hole 63 into which the tip end portion of the shaft fixing portion 57 of the wheel shaft 43 can be inserted through a gap in the left-right direction. As shown in FIG.
[0032]
That is, the longitudinal direction of the shaft positioning guide hole 63 is directed in the left-right direction, and the dimension in the width direction of the shaft positioning guide hole 63 is such that the tip end portion of the shaft fixing portion 57 is inserted so that there is almost no gap. That's it. The distal end portion of the shaft fixing portion 57 is formed to be guided in the left-right direction along the shaft positioning guide hole 63.
[0033]
As described above, the driven wheel 25 is supported by the driven wheel mounting portion 55 of the wheel shaft 43 via the bearing 45, and the shaft fixing portion 57 of the wheel shaft 43 is inserted into the shaft insertion hole 59 of the shaft support 47. The base 53 of the wheel shaft 43 is inserted into the shaft support hole 61 and positioned.
[0034]
Since the tip end portion of the shaft fixing portion 57 of the wheel shaft 43 is regulated in the width direction of the shaft positioning guide hole 63, the wheel shaft 43 can swing in the left-right direction.
[0035]
A push bolt 65 is screwed and protruded on both side walls in the longitudinal direction (left and right direction) of the shaft positioning guide hole 63 so as to be able to advance and retract. By rotating the two push bolts 65 to advance and retract the front ends of the respective push bolts 65, the front ends of the shaft fixing portions 57 of the wheel shaft 43 inserted into the shaft positioning guide holes 63 become the front ends of the two push bolts 65. And is positioned at a desired position in the shaft positioning guide hole 63.
[0036]
Since the tension is applied to the driven wheel 25 by rotating the tension screw 51 and pulling the shaft support 47, the wheel shaft 43 is inclined and the driven wheel 23 is inclined, so that the band saw blade is misaligned.
[0037]
However, the base 53 of the wheel shaft 43 is positioned in the shaft support hole 61 of the shaft support 47, and the tip of the shaft fixing portion 57 of the wheel shaft 43 is moved and adjusted as the two push bolts 65 advance and retract. Therefore, the inclination of the wheel shaft 43 with respect to the left-right direction is directly adjusted. As a result, the centers of the rotational surfaces of the driven wheel 25 and the drive wheel 23 are in the same position, and unlike the conventional case, the band saw blade can be easily Misalignment is corrected.
[0038]
A contact plate 67 is applied to the end surface of the shaft support 47 on the shaft positioning guide hole 63 side, and a fixing bolt 69 is screwed to the front end surface of the wheel shaft 43 through the contact plate 67. Therefore, as described above, after the inclination of the wheel shaft 43 is adjusted by the advance and retreat of the push bolt 65, the wheel shaft 43 is fixed to the shaft support 47 by tightening the fixing bolt 69.
[0039]
The wheel shaft 43 of the driven wheel 25 is moved in the direction opposite to the drive wheel 23 side, and the tension of the band saw blade is adjusted.
[0040]
In the example of the embodiment described above, the base portion 53 of the wheel shaft 43 is supported by the shaft support hole 61 of the shaft support body 47 by the eye and the end portion of the wheel shaft 43 is provided to swing. This method is not particularly limited, and can be pivotally supported in the shaft support hole 61 via a member such as a spherical bearing at the base 53 of the wheel shaft 43 or the base of the base 53.
[0041]
In addition, this invention is not limited to the example of embodiment mentioned above, It can implement in another aspect by making an appropriate change. In the example of the present embodiment, a horizontal band saw is described as an example of the band saw, but a saddle band saw or other band saws may be used.
[0042]
【The invention's effect】
As can be understood from the above embodiments, according to the first and second aspects of the invention, the wheel supported on the shaft support by moving the shaft support in the longitudinal direction of the band saw blade. The shaft also moves, the driven wheel supported by the wheel shaft moves in the longitudinal direction of the band saw blade, and the tension of the band saw blade wound around the drive wheel and the driven wheel is adjusted.
[0043]
At this time, since the wheel shaft is loaded, the wheel shaft is tilted, and thus the driven wheel is misaligned. However, a part of the wheel shaft in the longitudinal direction is partially supported by the shaft support. The other end of the wheel shaft can swing. Since the inclination of the wheel shaft can be directly adjusted by moving and adjusting the other end of the wheel shaft in the longitudinal direction of the band saw blade, the inclination of the driven wheel can be easily adjusted.
[0044]
Further, since the inclination of the wheel shaft can be directly adjusted by moving and adjusting the other end portion of the wheel shaft in the longitudinal direction of the band saw blade, the shaft support body can be adjusted along the guide groove of the saw blade housing. It becomes possible to move in the direction, and the number of parts can be reduced because a tension body as in the prior art is not required.
[0045]
For the above reasons, it is possible to provide a saw blade centering device that is inexpensive in total cost, such as shortening of part manufacturing and assembly time, and shortening of the saw blade centering time.
[0046]
According to the invention of claim 2, the wheel shaft is supported by the shaft support in the vicinity of the center of the wheel shaft, and both end sides of the wheel shaft can swing in the longitudinal direction of the band saw blade by the push bolt. The longitudinal inclination of the band saw blade can be easily adjusted, and as a result, the misalignment of the driven wheel can be corrected efficiently.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a saw blade centering device in a band saw machine according to an embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a front view of a horizontal band saw machine according to an embodiment of the present invention.
FIG. 4 is a longitudinal sectional view of a saw blade centering device in a conventional band saw machine.
5 is a plan view taken along the line VV in FIG. 4. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Horizontal type band saw machine 5 Saw blade housing 9 Work table 13 Vise apparatus 15, 17 Housing part 23 Drive wheel 25 Drive wheel 27, 29 Shaft 41 Saw blade centering apparatus 43 Wheel shaft (shaft 29)
47 Shaft support 49 Guide groove 51 Tension screw 53 Base 55 Drive wheel mounting part 57 Shaft fixing part 59 Shaft insertion hole 61 Shaft support hole 63 Shaft positioning guide hole 65 Push bolt

Claims (3)

In order to adjust the misalignment of the band saw blade that occurs when adjusting the tension of the band saw blade wound around the drive wheel and the driven wheel provided in the saw blade housing, the driven wheel is placed on one end side of the wheel shaft. At the same time, the other end of the wheel shaft is attached to the saw blade housing via the shaft support, the shaft support is moved in the longitudinal direction of the band saw blade, and the other end of the shaft wheel is moved to the longitudinal length of the band saw blade. A method for centering a saw blade in a band saw machine, wherein the inclination of the shaft wheel is adjusted by swinging in a direction. A saw blade housing that rotatably supports a band saw blade wound around a drive wheel and a driven wheel is supported, and the driven wheel is supported on one end side of the wheel shaft, and the other end side of the wheel shaft is supported by the shaft. The shaft support is provided on the saw blade housing so as to be movable and adjustable in the longitudinal direction of the band saw blade in order to adjust the tension of the band saw blade.
A part of the wheel shaft in the longitudinal direction is swingably supported on the shaft support, and the other end of the wheel shaft is provided so that the position of the wheel shaft can be adjusted in order to adjust the tilt of the swingable wheel shaft. A saw blade centering device in a band saw machine. Near the center of both ends of the wheel shaft is supported by the end of the shaft support on the driven wheel side, and the other end of the wheel shaft opposite to the driven wheel side is positioned with a push bolt in the longitudinal direction of the band saw blade. The saw blade centering device in a band saw machine according to claim 2, wherein the saw blade centering apparatus is adjustable.

Images