JP3344733B2 - Chip removal equipment for sawing machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing chips adhering to a saw blade in a sawing machine such as a band saw machine or a circular sawing machine, and more particularly to an apparatus for removing chips adhering to the saw blade. For example, the present invention relates to a chip removing device capable of reliably removing chips by always keeping an amount of overlap between a cleaning tool such as a brush and the above-mentioned saw blade at a substantially appropriate amount.

[0002]

2. Description of the Related Art Conventionally, as a device for removing chips attached to a saw blade in a sawing machine, a circular wire brush rotatably provided is overlapped with the saw blade, and the wire brush is rotated. Is configured to remove chips from the saw blade.

[0003] Since the above-mentioned wire brush is severely worn, it may not be possible to sufficiently remove chips from the saw blade when used for a long time. Therefore, conventionally, an operator visually observes the amount of wear of the wire brush and adjusts the amount of overlap of the wire brush with the saw blade every time the wire brush wears. Then, when the wire brush has worn down to its use limit, the wire brush is replaced with a new one.

As described above, in a configuration in which the operator adjusts the amount of overlap between the wire brush and the saw blade, there is an individual difference among workers in maintaining the amount of overlap at an appropriate amount. For example, Japanese Patent Laid-Open No. 1-177912 (hereinafter simply referred to as a prior example)
As shown in (1), a technique has been developed for automatically detecting the wear amount of the wire brush and adjusting the amount of overlap of the wire brush with the saw blade.

[0005]

In the above-mentioned prior art, the amount of wear of the wire brush is reduced by moving the wire brush from a position where the wire brush is removing chips from the saw blade to a position where the amount of wear is measured. Removal of chips from the saw blade because the amount of overlap can be automatically adjusted by automatically detecting and measuring the amount of wear and then adjusting the position of the wire brush with respect to the saw blade according to the amount of wear. Is effective as a configuration for automatically performing

However, even in the prior art, there is a point to be further improved. That is, the rate of change in the amount of wear of the wire brush differs depending on the type of saw blade used, changes in the cutting conditions of the work, and the like. In some cases, the amount of wire brush abrasion is detected because the amount of overlap between the saw blade and the wire brush may not be adjusted even though the wire brush has worn out so as not to remove chips from the saw blade. There is a problem that setting the time properly is troublesome.

[0007] The present invention has been made in view of the above-mentioned conventional problems.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an apparatus for removing swarf adhering to a saw blade in a sawing machine, comprising a saw blade housing supporting the saw blade. A cleaning tool supporting member movable in a direction approaching and moving away from the saw blade, and the amount of overlap between the cleaning tool supported by the cleaning tool supporting member and the saw blade is always maintained at a substantially appropriate amount. An actuator capable of adjusting the movement of the cleaning tool in a direction approaching and separating from the saw blade, and always detecting the outer peripheral edge of the cleaning tool at a fixed position on the saw blade side close to the saw blade. A sensor for controlling the actuator is provided so that the amount of overlap between the cleaning tool and the saw blade is always maintained at a substantially appropriate amount, and it is detected that the cleaning tool support member comes closest to the saw blade. Cleaning tools Those formed by providing a sensor for detecting that the Worn.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, embodiments of the present invention will be described. First, for ease of understanding, an overall configuration of a sawing machine will be schematically described.

In this embodiment, as an overall configuration of the sawing machine, a case of a horizontal band sawing machine will be exemplified and described. However, the present invention is not limited to a horizontal band sawing machine, but may be a vertical band sawing machine. The present invention can be easily applied to a circular saw using a circular saw blade or a hacksaw.

Referring to FIG. 6, a horizontal band sawing machine 1 as an example of a sawing machine is provided with a box-shaped base 3 on which a work material W is supported. Work table 5
And a pair of fixing vise 7a, 7 for fixing the work material W to a predetermined position on the work table 5.
b is provided. One fixing vise 7a is immovable, and the other fixing vise 7b is one fixing vice 7a.
It is possible to move in the left-right direction (left-right direction in FIG. 6) approaching and moving away from a. The work table 5 constitutes a part of the base 3.

The base 3 is provided with a saw blade housing 11 which can swing up and down via a hinge shaft 9. In order to swing the saw blade housing 11, an elevating cylinder 13 is provided at an appropriate position on the base 3, and a piston rod 15, which can protrude upward from the elevating cylinder 13, is mounted on the saw blade housing 11. It is connected to the appropriate position. In addition, as a configuration for vertically moving the saw blade housing 11 with respect to the base 3, in addition to the above-described configuration, a guide post is erected on the base 3, and the saw blade housing 11 guided by the guide post is used. It is possible to use a structure that can be moved up and down.

A drive wheel 19 and a driven wheel 17 are rotatably provided in the saw blade housing 11, and an endless saw blade 21 is wound around the drive and driven wheels 19 and 17. The drive wheel 19 is linked to a rotating device (not shown).

In order to hold the saw blade 21 substantially perpendicular to the work material W supported on the work table 5, a beam member 23 attached to the saw blade housing 11 has a pair of saw blade guides 25a. , 25b are provided so as to be adjustable in position. Note that one saw blade guide 25a is stationary, and the other saw blade guide 25b approaches one saw blade guide 25a.
It can be moved in the left and right directions away from each other.

With the above configuration, a pair of fixed vises 7a,
The work material W is fixed at a predetermined position on the work table 5 by moving the work material 7b closer. Then, the rotating device is appropriately operated to drive and the driven wheels 19 and 17 are rotated to drive the band saw blade 21 to travel, and the lifting cylinder 13 is appropriately operated to swing the saw blade housing 11 downward. Let it. Thereby, the pair of saw blade guides 25a,
The work material W is cut by the saw blade 21 held and guided perpendicularly to the work material W by 25b.

The saw blade 21 is cut by cutting the work material W.
The saw blade housing 11 is provided with a chip removing device 27 for removing the chips attached to the blade.

Referring to FIGS. 1 and 2, the chip removing device 27 includes a saw blade housing 11 supporting a saw blade 21.
It is attached to.

More specifically, a motor bracket 29 is mounted on the saw blade housing 11 at an appropriate position via a plurality of bolts.
1 is appropriately mounted, and a guide bracket 33 is integrally mounted.

A cleaning tool support member 35 is supported on the guide bracket 33. The cleaning tool support member 35
, A cleaning tool 37 is rotatably supported. The cleaning tool 37 has a function of removing cutting chips adhering to the saw blade 21. For example, the cleaning tool 37 is formed in a disk shape by using plastics or appropriate rubber or soft metal, or is formed in a circular shape. The cleaning tool support member 35 is rotatably mounted on an output rotary shaft 39 so as to be detachable and replaceable.

The cleaning tool support member 35 includes the motor 3
A rotation transmission shaft 41 for transmitting the rotation of the first rotation to the output rotation shaft 39 is rotatably provided.
Is linked to the output shaft 45 of the motor 31 via a universal joint 43. The transmission of the rotation from the rotation transmission shaft 41 to the output rotation shaft 39 is performed, for example, via a bevel gear or the like.

In the above configuration, a part of the outer peripheral edge of the cleaning tool 37 is overlapped with the saw blade 21, and the cleaning tool 37 is rotated by the motor 31 so that the chips adhered to the saw blade 21 are removed. It will be appreciated that removal can be performed.

In order to adjust the amount of overlap of the cleaning tool 37 with the saw blade 21, an overlap amount adjusting device is provided, and the cleaning tool support member 35 is provided.
Is provided so as to be movable in a direction approaching and separating from the saw blade 21.

More specifically, the guide bracket 33
Is provided with an arc-shaped guide hole 49 for guiding in a direction approaching and separating from the saw blade 21 via a plurality of guide rollers 47 provided on the cleaning tool support member 35, and an arc-shaped guide hole 49. A rack 51 is provided. The rack 51 meshes with a pinion 55 driven by a motor 53 as an appropriate actuator mounted on the cleaning tool support member 35.

Therefore, by appropriately controlling the motor 53, the cleaning tool support member 35 can be connected to the guide holes 49,
It can move along the rack 51 and move in the direction approaching and moving away from the saw blade 21,
It can be understood that the amount of overlap of the cleaning tool 37 with respect to the distance can be adjusted.

The overlap amount adjusting device is provided with a sensor for detecting the cleaning tool 37 so that the amount of overlap of the cleaning tool 37 with the saw blade 21 is always maintained at a substantially appropriate amount. More specifically, a sensor 57 for detecting the outer peripheral edge of the cleaning tool 37 is provided at a fixed position on the saw blade 21 side of the guide bracket 33 close to the saw blade 21 .

The sensor 57 is composed of an appropriate sensor such as a contact switch, a proximity switch, an optical system detector, and the like. When the wear of the cleaning tool 37 is detected, the sensor 57 is controlled by a control device (not shown). It has a function of controlling rotation and stop of the motor 53. That is, when the cleaning tool 37 gradually wears during the cutting of the work material W and the amount of overlap with the saw blade 21 decreases from an appropriate amount, the decrease in the amount of overlap due to wear of the cleaning tool 37 is detected by the sensor 57. Upon detection, the motor 53 is driven to move the cleaning tool support member 35 in a direction approaching the saw blade 21. When the overlapping amount of the cleaning tool 37 with respect to the saw blade 21 is adjusted to an appropriate amount, the sensor 5
Reference numeral 7 functions to detect that the outer peripheral edge of the cleaning tool 37 has been sent to an appropriate position and stop the motor 53.

As will be understood from the above description, according to the present embodiment, the amount of overlap of the cleaning tool 37 with the saw blade 21 is always adjusted and controlled to a substantially appropriate amount.

A sensor 59 is provided on the guide bracket 33 in order to detect that the cleaning tool 37 has worn down to the limit of use. The sensor 59 includes, for example, a limit switch and a proximity switch, and is activated by the cleaning tool support member 35 when the cleaning tool support member 35 comes closest to the saw blade 21.

Therefore, when the sensor 59 is activated, the cleaning tool 37 is worn to the limit of use. Therefore, when the sensor 59 is activated, it is necessary to replace the cleaning tool 37 with a new one.

As will be understood from the above, according to the present embodiment, the amount of overlap of the cleaning tool 37 with the saw blade 21 can always be maintained at an appropriate amount, so that the removal of cutting chips from the saw blade 21 is always ensured. It can be done. Cleaning tool 37
Is detected by the sensor 59 when it has worn down to the use limit value.
It will not be possible to remove the swarf from the material, but there is no problem.

By the way, in the above embodiment, the saw blade 2
The configuration in which the rack 51, the pinion 55, and the motor 53 are used as a configuration for moving the cleaning tool support member 35 in the direction of approaching and moving away from the device 1 is exemplified. As shown, an appropriate actuator such as a fluid pressure cylinder 61 can be used.

In the above-described embodiment, the sensor 57 is provided at a position close to the saw blade 21 in order to keep the amount of overlap of the cleaning tool 37 with the saw blade 21 at a substantially appropriate amount. However, the present invention is not limited to the above embodiment, and other embodiments are possible.

That is, when the amount of overlap of the cleaning tool 37 with the saw blade 21 increases, the load on the motor 31 increases, and when the amount of overlap decreases, the load on the motor 31 decreases. Even with the configuration for detecting, it is also possible to adopt a configuration in which the amount of overlap of the cleaning tool 37 with the saw blade 21 is always kept at a substantially appropriate amount.

More specifically, as shown by the imaginary line in FIG. 1, a current detector 63 for detecting the load of the motor 31 is used.
The detection value of the current detector 63 is compared with a preset allowable value at regular intervals such that the wear of the cleaning tool 37 does not progress very much. In this case, when the detected value is larger than the set allowable value, the cleaning tool 37 for the saw blade 21 is used.
Is large, the motor 53 or the fluid pressure cylinder 61 is operated to move the cleaning tool support member 35 in a direction away from the saw blade 21. When the detected value is smaller than the set permissible value, the overlap amount is small, so that the cleaning tool support member 35 is moved in the direction approaching the saw blade 21, contrary to the above.

By stopping the movement of the cleaning tool support member 35 when the detected value becomes equal to the set permissible value, the amount of overlap of the cleaning tool 37 with the saw blade 21 is maintained at a substantially appropriate amount. It will be.

Therefore, even when the load of the motor 31 is detected and the amount of overlap of the cleaning tool 37 with the saw blade 21 is adjusted, the same effect as in the above embodiment can be obtained.

FIG. 3 schematically shows a reference example of the present invention. In this reference example, the cleaning tool support member 35 rotatably supporting the cleaning tool 37 is pivotally supported on the bracket 29 via a pivot 65 so that the cleaning tool 37 can be rotated. The cleaning tool 37 is urged in the direction of the saw blade 21 by utilizing the own weight of the motor 31 mounted on the support member 35. And saw blade 2
In order to always keep the amount of overlap of the cleaning tool 37 with the cleaning tool 37 at a substantially appropriate amount, a limiting member 67 for contacting the outer peripheral edge of the cleaning tool 37 and restricting the movement of the cleaning tool 37 in the direction of the saw blade 21. Is provided.

The restricting member 67 is connected to the bracket 29
And is disposed in close proximity to the saw blade 21. This restricting member 67 has a function of abutting on the outer peripheral edge of the cleaning tool 37 and always maintaining the amount of overlap of the cleaning tool 37 with the saw blade 21 at a substantially appropriate amount. Although illustrated as a member, a rotatable roller or a limit switch or the like in relation to the above embodiment may be used.

As will be understood from the above description, in this reference example, when the cleaning tool 37 is worn, the motor 31 is automatically moved in the direction of the saw blade 21 by the weight of the motor 31 by the amount of wear, so that the cleaning tool 37 is always restricted. The cleaning tool 37 is kept in contact with the member 67, and the amount of overlap of the cleaning tool 37 with the saw blade 21 is always maintained at a substantially appropriate amount.

Also in this embodiment, a sensor 59 for detecting the limit value of use of the cleaning tool 37 is provided, and when the cleaning tool 37 is worn to the usage limit value, the wear can be detected. .

FIG. 4 shows still another reference example, which is constructed as follows. That is, an arc-shaped guide hole 71 is provided in a guide bracket 69 provided at a lower portion of the saw blade housing 11, and a restricting member 73 of the cleaning tool 37 is provided. Then, the cover 75 which rotatably supports the rotation shaft of the cleaning tool 37 is provided in the guide hole 71.
The cover 75 is provided with a weight 77 for urging the cleaning tool 37 in the direction of the saw blade 21. The weight 77 is auxiliary and can be omitted when the own weight of the cover 75 can be used. As is already understood, in this reference example, the cleaning tool 37 causes the saw blade 2
1, and the cleaning tool 37 abuts on the restricting member 73, whereby the cleaning tool 37 with respect to the saw blade 21 is pressed.
Can always be maintained at an approximately appropriate amount.

As a structure for urging the cleaning tool 37 in the direction of the saw blade 21, an elastic member such as a spring or a spring is used instead of the structure using the own weight of the constituent member itself as in the above-described reference example. It is also possible to adopt a configuration in which: More specifically, as shown by an imaginary line in FIG. 3, it is also possible to adopt a configuration in which a spring 79 or the like is stretched between the bracket 29 and the cleaning tool support member 35.

Although the above embodiment has been described only with respect to the embodiment in which a rotary brush or the like is used as the cleaning tool 37, the cleaning tool 37 does not necessarily need to rotate.

FIG. 5 shows a reference example in which a cleaning tool 81 such as a brush is swingably provided. In this reference example, the cleaning tool 81 is attached to and detached from the tip of a cleaning tool support member 85 that is swingable in a direction approaching and separating from the saw blade 21 around the hinge shaft 83. A freely oscillating member 87 is pivotably supported via a hinge shaft 89. A crank pin 93 eccentrically rotated by a motor 91 supported by a cleaning tool support member 85 is engaged with a slit 87S provided at a lower portion of the swing member 87.

In order to swing the cleaning tool support member 85, a pinion 99 rotated by a motor 97 is engaged with a gear 95 provided on the cleaning tool support member 85. Therefore, in this reference example, the chips attached to the saw blade 21 can be removed by swinging the cleaning tool 81 in the direction of arrow A by driving the motor 91. By appropriately driving the motor 97 to control the position of the cleaning tool support member 85 in the direction of arrow B, the amount of overlap of the cleaning tool 81 with the saw blade 21 can be adjusted. In this case, for example, by detecting the load of the motor 91, it is possible to detect whether or not the amount of overlap of the cleaning tool 81 with the saw blade 21 is approximately an appropriate amount. Can be easily implemented.

[0046]

As will be understood from the above description of the embodiment, in the present invention, in order to always keep the amount of overlap of the cleaning tool 37 with the saw blade 21 approximately constant, the cleaning tool 37 is used. The cleaning tool 3 is provided with an actuator 53 capable of adjusting the movement of the cleaning tool support member 35 in the direction of approaching and separating from the saw blade 21.
7 cleaning instrument 37 against the saw blade 21 to the outer peripheral edge always detected and the
Is provided with a sensor 57 for controlling the actuator 53 so as to always maintain the overlap amount of the actuator 53 at a substantially appropriate amount.

Therefore, according to the present invention, the outer periphery of the cleaning tool 37 is always detected by the sensor 57 and the actuator 5
3 controls to always overlap amount of the cleaning tool 37 with respect to saw blade 21 is intended to be held substantially proper amount. That is, in the present invention, the cleaning tool 37 is
If the amount of overlap of the cleaning tool 37 with the saw blade 21 is insufficient or the amount of overlap is excessive, the actuator 53 is controlled to detect the outer peripheral edge and control the amount of overlap to an approximately appropriate amount. As a result, it is possible to prevent the chip removal from becoming insufficient due to an insufficient amount of the cleaning tool 37 overlapping the saw blade 21, and also to prevent the cleaning tool 37 from overlapping the saw blade 21. It is also possible to prevent the cleaning tool 37 from being excessively worn due to being excessively large.

[Brief description of the drawings]

FIG. 1 is a view taken in the direction of an arrow II in FIG. 2;

FIG. 2 is an enlarged detailed view of a portion viewed from an arrow II in FIG. 6;

FIG. 3 is an explanatory diagram showing a reference example of the present invention.

FIG. 4 is an explanatory view showing another reference example of the present invention.

FIG. 5 is an explanatory view showing still another reference example of the present invention.

FIG. 6 is an overall view showing one embodiment of a sawing machine.

[Explanation of symbols]

 11 Saw Blade Housing 21 Saw Blade 35 Cleaning Tool Supporting Member 37 Cleaning Tool 57 Sensor

Claims (1)

(57) [Claims] An apparatus for removing chips adhered to a saw blade (21) of a sawing machine, comprising: a saw blade housing (11) supporting the saw blade (21); Cleaning tool support member (35) movable in the direction of approaching and moving away
The cleaning tool (37) is provided so that the amount of overlap between the cleaning tool (37) supported by the cleaning tool support member (35) and the saw blade (21) is always maintained at a substantially appropriate amount.
And an actuator (53) capable of adjusting the movement of the saw blade (21) toward and away from the saw blade (21).
The outer peripheral edge of the cleaning tool (37) is always detected at a fixed position on the side of the saw blade (21) close to 1), and the amount of overlap between the cleaning tool (37) and the saw blade (21) is always substantially appropriate. A sensor (57) for controlling the actuator (53) to maintain the amount is provided, and it is detected that the cleaning tool support member (35) comes closest to the saw blade (21),
A chip removing device for a sawing machine, further comprising a sensor (59) for detecting that the cleaning tool (37) has worn down to the limit of use.