JPH0512083B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a band saw machine equipped with an endless band saw blade that is wound around a driving wheel and a driven wheel, and more particularly relates to a band saw machine that is equipped with an endless band saw blade that is wound around a driving wheel and a driven wheel, and more particularly, it relates to a band saw machine that is equipped with an endless band saw blade that is wound around a driving wheel and a driven wheel. The present invention also relates to a bandsaw machine that can be easily operated.

[Technical Background of the Invention] Generally, in a horizontal bandsaw machine for cutting materials, a processing head device equipped with a bandsaw blade for cutting the materials is placed on a base on which the materials are placed and fixed, and is movable up and down. It is provided. The band saw blade is provided in the processing head device and is wound around a driving wheel and a driven wheel, and in the cutting area,
A pair of guide devices guides and holds the teeth vertically with the tooth tips facing down.

Generally, in horizontal bandsaw machines, the machining head device is provided at an appropriate inclination to the rear with respect to the horizontal, and in rare cases vertically. On the other hand, the saw blade is twisted vertically in the cutting area. Therefore, when replacing the saw blade, the band saw blade must be hung around the drive wheel and the driven wheel with a portion of the saw blade twisted vertically, which is dangerous. In particular, in the case of a large band saw blade that is relatively thick and wide, it is not easy to twist it, and the risk is even greater.

[Object of the Invention] The present invention was invented in view of the above-mentioned problems, and it is an object of the present invention to provide a band saw machine that allows the band saw blade to be easily and safely replaced without twisting the band saw blade. It is something to do.

[Summary of the Invention] In order to achieve the above object, the present invention twists and guides an endless bandsaw blade, which is wound around a driving wheel and a driven wheel, so that the cutting edge is directed toward the workpiece. A band saw machine is provided with a guide arm having a band hem blade guide device at the end between the two wheels, and the band saw blade guide device is configured such that the band saw blade can be inserted freely and the band saw blade can be inserted from the back direction. At the end of the guide arm, a rotary body is provided with a receivable groove and a plurality of saw blade guide members on both sides of the groove that guide the band saw blade by contacting a side surface of the body of the band saw blade. It is rotatably equipped with an arc-shaped bearing part formed in the
The rotating body has a position in which the groove is opened in a direction substantially parallel to the axis of the wheels, and a position in which the groove is opened in a direction substantially parallel to the axis of the wheels so that the band saw blade, which is wound around both wheels, can be received from the back into the groove without twisting. is open in the direction of the workpiece and is rotatable to a twisted position such that the cutting edge of the band saw blade is oriented in the direction of the workpiece.

[Embodiment] Referring to FIG. 1, a horizontal bandsaw machine 1 is roughly composed of a box-shaped base 3 and a cutting head 5, and the cutting head 5 is connected via a hinge pin 7. It is supported on the base 3 so as to be able to swing vertically. A work table 9 on which a workpiece W is placed to be cut is provided on the base 3, and a fixed vise jaw 11f and a movable vise jaw 11m, which can freely clamp and fix the workpiece W, are provided on the work table 9. A vice device 11 is attached. The cutting head 5 includes housing parts 13 and 15, each housing part 13 and 15 being integrally connected by a beam member 17, on which a control box 19 is mounted.
is provided.

Inside the housing parts 13 and 15 of the cutting head 5 are drive wheels 21 and 21, respectively.
A driven wheel 23 is rotatably installed inside via shafts 25 and 27. In order to easily attach and detach the endless bandsaw blade 29 that is wound around the drive wheel 21 and the driven wheel 23, the driven wheel 23 is provided so as to be adjustable in its movement toward and away from the drive wheel 21. There is. Although detailed illustrations are omitted, as is well known, the movement of the driven wheel 23 is adjusted by rotating a tension handle 31 rotatably provided in the housing portion 15.

The band saw blade 29 is guided and held vertically downward by the fixed guide arm 33 and the movable guide arm 35 so that the cutting edge is directed in the direction of cutting into the workpiece W, thereby cutting the horizontal band saw machine 1. In the region, a cut is formed between the two guide arms 33, 35. Both guide arms 3 above
3 and 35 are supported by a guide member 37 fixed to the beam member 17, and a band saw blade guide is provided at the lower end for vertically twisting and guiding the band saw blade 29, as will be described in detail later. Devices 39 and 41 are provided, respectively. The fixed guide arm 33 is
The movable guide arm 35 is fixedly supported on a guide member 37, and the movable guide arm 35 supports the workpiece W to be cut.
In order to adjust the cutting portion of the band saw blade 29 according to the size of the band saw blade 29, the band saw blade 29 is supported so as to be adjustable and fixed in position in directions approaching and away from the fixed guide arm 33.

The cutting head 5 has a workpiece W.
In order to cut the band saw blade 29 against the workpiece W and to separate the band saw blade 29 from the workpiece W, the hydraulic cylinder 45 equipped with a piston rod 43 is actuated to swing vertically around the hinge pin 7. It is configured. That is, when pressure oil is supplied to the hydraulic cylinder 45, the cutting head 5 rises, and when the pressure oil is drained from the hydraulic cylinder 45, the cutting head 5 descends due to its own weight.

Since the band saw blade guide devices 39 and 41 provided at the lower ends of both guide arms 33 and 35 have a symmetrical structure, the structure and operation of one band saw blade guide device 41 will be explained in detail, and the other band saw blade guide device 41 will be explained in detail. A description of the band saw blade guide device 39 will be omitted.

Referring to FIGS. 2 to 4, a rotating body 47 is rotatably and fixedly provided at the lower end of the movable guide arm 35 in order to vertically twist the band saw blade 29. More specifically, the lower end of the movable guide arm 35 has a bearing portion formed in an arc shape by notching a portion of a circle to an appropriate size, so that the running direction and the axis of the band saw blade 29 are aligned. A substantially parallel through hole 49 is formed, and a bandsaw blade 29 is provided at an appropriate position (in this embodiment, on the front side).
An opening 51 is formed as a notch of an appropriate size through which the material can freely pass. The opening direction of the opening 51 is preferably parallel to the axes 25, 27 of the drive and driven wheels 21, 23.

The rotating body 47 has a roughly cylindrical shape and is rotatably supported in the through hole 49. This rotating body 47 has a radial groove 53 that passes through the axis of the rotating body 47 and opens toward the circumferential surface thereof. Further, a semicircular fixed flange member 57 and a movable flange member 59 are attached to the end surface of the rotating body 47 facing the workpiece W (the right end surface in FIG. 3) via a plurality of bolts 55. They are mounted facing each other with the groove portion 53 in between. A long hole 61 is formed in the movable flange member 59 in the radial direction of the rotating body 47 and parallel to the opening direction of the groove 53, and the long hole 61 is provided in a position adjustable and fixed in the longitudinal direction of the long hole 61. . A first saw blade guide member 63 that supports and guides the back of the band saw blade 29 passing through the groove 53 is supported on the movable flange member 59 via a shaft 69. Although the first saw blade guide member 63 is exemplified as a rotatable roller in this embodiment, it is not limited to the roller, and a carbide tip member or the like may also be used.

With the above configuration, the effective width of the band saw blade 29 (width from the back to the bottom of the gullet part) can be adjusted according to the width of the band saw blade 29 by adjusting the position of the first saw blade guide member 63. The center position of the rotating body 47 can be made to substantially coincide with the rotation axis of the rotating body 47.

Furthermore, at the end opposite to the side where the rotating body 47 faces the workpiece W (the left end in FIG. 3), there is a second saw blade guide member that supports and guides one side of the body of the band saw blade 29. 65 is attached, and a third saw blade guide member 67 that supports and guides the other side of the body of the saw blade 29 is also attached. The second and third saw blade guide members 65 and 67 have the function of holding the band saw blade 29 and twisting it vertically, and are provided facing each other. More specifically, the second saw blade guide member 6
5 is in contact with one side of the band saw blade 29 near the center of the width of the band saw blade 29, and regulates one side of the band saw blade 29 so as to substantially coincide with the rotation axis of the rotating body 47. . The third saw blade guide member 67 is
It is in contact with the other side surface of the band saw blade 29 at a position close to the back of the band saw blade 29, and is provided so as to be freely adjustable in a direction toward and away from the second saw blade guide member 65. Second and third saw blade guide members 6
5 and 67 are illustrated as rollers in this embodiment, the second saw blade guide member 65 is connected to a shaft 70 fixed to the rotating body 47, and the third saw blade guide member 67 is
is supported by an eccentric shaft 71 which is rotatably and fixedly supported by the rotating body 47. Therefore, the eccentric shaft 7
By appropriately rotating the third saw guide member 67, the position of the third saw guide member 67 can be adjusted in accordance with the thickness of the band saw blade 29.

In order to rotate the rotating body 47, the rotating body 47
A worm gear 73 is integrally attached to the
A worm 75 is meshed with the worm gear 73. The worm 75 has a handle 7 at one end.
7 is attached to a rotating shaft 79, and the rotating shaft 79 is rotatably supported by a bracket 81 fixed to the movable guide arm 35. Therefore, by appropriately rotating the handle 77, the rotating body 47 can be appropriately rotated, and is supported and guided by the first to third saw blade internal members 63, 65, 67 provided in the rotating body 47. The band saw blade 29 can be twisted vertically.

In the above configuration, when mounting the band saw blade 29, first, the first and third saw blade guide members 63,
67 and operate the handle 77 to rotate the rotating body 47 appropriately.
groove 53 and fixed and movable guide arm 33,
The opening 51 of 35 is made to coincide with the opening 51 of 35. Next, the bandsaw blade 29 is connected to the first to third saw blade guide members 63, 65,
The rotating body 47 is supported and guided by 67.
The band saw blade 29 is inserted into the groove portion 53 of the band saw blade 29 and is hooked around the drive wheel 21 and the driven wheel 23.
As described above, when inserting the band saw blade 29 into the groove 53 of the rotary body 47, the opening direction of the groove 53 and the axes 25, 27 of both wheels 21, 23 are approximately parallel, so the band saw blade 29 is inserted into the groove 53 of the rotating body 47. There is no need to twist the band saw blade 29, and the band saw blade 29 can be easily attached.

As mentioned above, the band saw blade 2 is attached to both wheels 21 and 23.
9 and inserting the band saw blade 29 into the groove 53 of the rotating body 47, the tension handle 31 is operated to apply appropriate tension to the band saw blade 29, and the handle 77 is operated to rotate the band saw blade 29. The mounting of the band saw blade 29 is completed by rotating the moving body 47 and twisting the band saw blade 29 vertically. Therefore,
The band saw blade 29 is twisted by both wheels 21 and 23.
This operation is not performed when the band saw blade 29 is wound around the wheels 21 and 23, but is performed after the band saw blade 29 is turned around both wheels 21 and 23, thereby improving safety.

[Effects of the Invention] As can be understood from the above description of the embodiments, the present invention is capable of moving the endless bandsaw blade 29, which is wound around the drive wheel 21 and the driven wheel 23, in the direction of the workpiece W. Band saw blade guide device 3 that twists and guides the blade so that it is oriented
Guide arms 33, 35 with 9, 41 at the ends
are provided between the two wheels 21, 23, and the band saw guide devices 39, 41
A plurality of saw blades are provided with a groove portion 53 into which the band saw blade 29 can be freely inserted and which can receive the band saw blade 29 from the back direction, and which guide the band saw blade 29 by coming into contact with a side surface of the body of the band saw blade 29. Guide member 6
5, 67 on both sides of the groove portion 53 is rotatably provided on an arcuate bearing portion 49 formed at the end of the guide arms 33, 35. , both wheels 21,
a position in which the groove 53 is opened in a direction substantially parallel to the axes 25, 27 of the wheels 21, 23 so that the band saw blade 29, which is wound around the band saw blade 23, can be received from the back into the groove 53 without twisting; The groove portion 53 opens in the direction of the workpiece W and is rotatable to a twisted position such that the cutting edge of the band saw blade 29 is oriented in the direction of the workpiece W.

As is clear from the above configuration, in the present invention, the rotating body 47 rotatably provided on the arc-shaped bearing formed at the end of the guide arm of the band saw machine can receive the band saw blade 29 from the back. A groove 53 is provided, and saw blade guide members 65 and 67 for guiding the band saw blade 29 are provided on both sides of the groove 53. The rotating body 47 moves the band saw blade 29 in a direction substantially parallel to the axes 25, 27 of the wheels 21, 23 around which the saw blade 29 is wound, so that the band saw blade 29 is received into the groove 53 without being twisted. The band saw blade 29 is rotatably provided between a position in which the groove portion 53 is open and a position in which the band saw blade 29 is twisted so that the cutting edge is oriented in the direction of cutting into the workpiece W.

That is, according to the present invention, the opening of the groove portion 53 of the rotating body 47 is connected to the shaft 25 of the wheels 21, 23,
Since the band saw blade 29 can be attached and detached while being oriented in a direction substantially parallel to the band saw blade 27, in other words,
Since there is no need to twist the band saw blade 29 when replacing the band saw blade 29, safety is improved.

Note that the present invention is not limited to the above-described embodiments, but can be implemented in other embodiments by making appropriate changes.

[Brief explanation of the drawing]

Fig. 1 is a front view of the horizontal bandsaw machine, Fig. 2 is a view along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a sectional view taken along the - line in Fig. 1. - is an arrow view along the line. 21... Drive wheel, 23... Driven wheel, 29... Band saw blade, 33, 35... Guide arm, 47... Rotating body, 63, 65, 67... Saw blade guide member.

Claims (1)

[Claims] 1. The band blade guide devices 39, 41 that twist and guide the endless band blade 29, which is wound around the drive wheel 21 and the driven wheel 23, so that the cutting edge is directed toward the workpiece W are installed at the end. The guide arms 33 and 35 provided in the above-mentioned wheels 2
1 and 23, the band saw guide devices 39 and 41 are provided with a groove 53 through which the band saw blade 29 can be freely inserted and which can receive the band saw blade 29 from the back direction. Blade 29
A plurality of saw blade guide members 65 and 67 that guide the band saw blade 29 by contacting the side surface of the body of the band saw blade 29 are inserted into the groove portion 53.
Rotating bodies 47 provided on both sides of the guide arms 33 and 35 are rotatably provided on arc-shaped bearings 49 formed at the ends of the guide arms 33 and 35.
is a shaft 2 of both wheels 21, 23 in order to receive the band saw blade 29, which is wound around both wheels 21, 23, into the groove 53 from the back without twisting it.
5 and 27, and a position in which the groove 53 opens in the direction of the workpiece W so that the cutting edge of the band saw blade 29 is directed in the direction of the workpiece W. A bandsaw machine characterized by being rotatable between a twisted and raised position.