JP2005319541A - Saw blade driving method and device for sawing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To extend the life of a saw blade and to reduce vibration and noise by reducing cutting impact force when the cutting impact force is generated to the saw blade in cutting a cut material. <P>SOLUTION: In a sawing machine 1, the saw blade B is endlessly wound around a plurality of wheels rotatably supported to a saw blade housing 7, and at least one of the plurality of wheels is made a drive wheel 21 and rotationally driven by a saw blade drive unit 53 to allow the saw blade B to rotate and travel to thereby cut the cut material with the traveling and rotating saw blade B. The saw blade drive unit 53 is connected to a shaft 25 of the driving wheel 21, in a state of floating in the rotating direction of the saw blade with respect to the saw blade housing 7. Since the saw blade rotating direction of the saw blade drive unit 53 is regulated through a buffer part 71 provided at the saw blade housing 7, reaction force generated by driving the saw blade can be damped by the buffer part 71. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a saw blade driving method and apparatus for a saw machine, and in particular, when a cutting impact force is generated in a saw blade when cutting a work material, the cutting impact force is reduced to reduce the saw blade life. The present invention relates to a saw blade driving method and apparatus in a saw machine for stretching, reducing vibration and noise.

  Conventionally, as a saw machine, an endless band saw blade is wound around a drive wheel and a driven wheel, and is clamped by a vise device by a band saw blade that rotates by driving the drive wheel by an electric saw blade motor. The cut workpiece is subjected to cutting. The saw machine is provided with a fixed insert for guiding the band saw blade and a moving insert for guiding the band saw blade by moving in accordance with the cutting width of the workpiece with respect to the fixed insert.

Further, the output shaft of the speed reducer is directly attached to the shaft center of the drive wheel that rotationally drives the band saw blade. There are two types of input shafts of the speed reducer: a type in which the power of an electric saw blade motor is transmitted by coupling and a type in which the power is transmitted by a pulley belt (for example, see Patent Document 1). As another saw machine, there is a system in which a plurality of wheels that wind an endless band saw blade are driven by a saw blade motor.
Japanese Patent No. 2725782

  By the way, in the conventional saw machine, it is devised so that the torque of the saw blade motor can be efficiently transmitted to the band saw blade. However, a contrivance is made to reduce the impact force of the saw blade cutting resistance generated when cutting is performed. I have not been told. Therefore, when a large impact force is applied to the band saw blade, the band saw blade is damaged, causing vibration and noise.

  The present invention has been made to solve the above-described problems.

The saw blade driving method in the saw machine of the present invention comprises winding a saw blade endlessly between a drive wheel rotatably supported on a saw blade housing and a driven wheel, and rotationally driving the drive wheel with a saw blade drive unit. In the saw blade driving method in the saw machine for rotating the saw blade by rotating and cutting the work material by the traveling and rotating saw blade,
The saw blade drive unit is connected to the shaft of the drive wheel in a floating state in the saw blade rotation direction with respect to the saw blade housing, and the saw blade of the saw blade drive unit is connected through a buffer provided in the saw blade housing. The rotational direction is restricted, and the reaction force generated by the saw blade drive is attenuated by the buffer portion.

  In the saw blade driving method in the saw machine according to the present invention, it is preferable that the buffer portion is a resin material having elasticity in the saw blade driving method in the saw machine.

  In the saw blade driving method for the saw machine according to the present invention, it is preferable that in the saw blade driving method for the saw machine, the buffer portion is a ridge.

  In the saw blade driving method of the saw machine according to the present invention, it is preferable that the buffer portion is a damper device in the saw blade driving method of the saw machine.

  In the saw blade driving method of the saw machine according to the present invention, it is preferable that in the saw blade driving method of the saw machine, the buffer portion is a vibration generating device that vibrates the saw blade driving unit.

In the saw blade drive device of the present invention, a saw blade housing is provided with a saw wheel wound endlessly on a drive wheel rotatably supported on a saw blade housing and a driven wheel, and the saw blade is driven to rotate. A saw blade drive unit in a saw machine configured to cut a workpiece with the saw blade that rotates and travels,
The saw blade drive unit is provided in a floating structure connected to the shaft of the drive wheel in a floating state in the saw blade rotation direction with respect to the saw blade housing, and regulates the saw blade rotation direction of the saw blade drive unit and the saw blade The saw blade housing is provided with a buffer portion that attenuates reaction force generated by driving.

  In the saw blade driving device in the saw machine of the present invention, in the saw blade driving device in the saw machine, it is preferable that the buffer portion is made of a resin material having elasticity.

  Moreover, it is preferable that the saw blade drive device in the saw machine of this invention comprises the said buffer part in a saw body in the saw blade drive device in the said saw machine.

  Moreover, it is preferable that the saw blade drive apparatus in the saw machine of this invention comprises the said buffer part by a damper apparatus in the saw blade drive apparatus in the said saw machine.

  In the saw blade driving device in the saw machine according to the present invention, it is preferable that in the saw blade driving device in the saw machine, the buffer portion is constituted by a vibration generating device that applies vibration to the saw blade driving unit.

  As will be understood from the means for solving the above-described problems, according to the present invention, when the work material is cut, even if the saw blade cutting resistance or impact force is applied to the saw blade, the saw blade is driven. Since the unit is in a floating state in the saw blade rotation direction with respect to the saw blade housing, a reaction force is generated in the direction opposite to the saw blade rotation direction around the axis of the drive wheel, and this reaction force is absorbed by the elasticity of the buffer section. Is done. As a result, damage, vibration, noise, etc. of the saw blade can be attenuated or prevented, and the life of the saw blade can be extended.

  Embodiments of the present invention will be described below with reference to the drawings.

  4 to 6, for example, a horizontal band saw 1 as a saw according to this embodiment includes a base 3, and guide posts 5 are provided on the base 3 on the left and right in FIG. 4. It is erected. On this guide post 5, a saw blade housing 7 having a band saw blade B as a cutting tool is guided by a guide member 9 so as to be movable up and down so as to slide. The saw blade housing 7 is moved up and down by, for example, the operation of a lifting / lowering hydraulic cylinder 11 as a saw blade cutting drive device provided on the base 3. The action of the lifting / lowering hydraulic cylinder 11 can control the cutting and rising separation of the band saw blade B with respect to the workpiece W as the work material.

  4, the left guide member 9 is provided with a saw blade position detecting encoder 13, and the moving speed of the saw blade housing 7, that is, the cutting speed of the band saw blade B, is determined by the saw blade position detecting encoder. 13 is controlled by feedback.

  The saw blade housing 7 is provided with left and right housing portions 15 and 17 spaced apart on both sides, and the left and right housing portions 15 and 17 are connected by a beam member (not shown), and between the left and right housing portions 15 and 17. Is provided with a housing part 19 through which the band saw blade B passes, along the beam member. The guide member 9 is integrally fixed to the left and right housing parts 15 and 17.

  The housing portions 15 and 17 of the saw blade housing 7 are internally provided with a drive wheel 21 and a driven wheel 23 via shafts 25 and 27, respectively, and an endless band saw blade B is hung on the drive wheel 21 and the driven wheel 23. It has been turned. For example, an electric saw blade motor 29 is linked to the shaft 25 of the drive wheel 21. The details of the structure of the interlocking connecting portion between the saw blade motor 29 and the shaft 25 of the drive wheel 21 will be described later.

  When the saw blade motor 29 is driven, the drive wheel 21 is rotated via the shaft 25, so that the band saw blade B wound around the drive wheel 21 and the driven wheel 23 is driven to cut the workpiece W. The

  The guide member 9 is provided with a fixed insert 31 (also referred to as “right blade guide”) and a movable insert 33 (also referred to as “left blade guide”). In the cutting region S where the band saw blade B cuts the workpiece W, the band saw blade B is guided and supported by the provided backup units 35 and 37 so that the cutting edge portion of the band saw blade B faces vertically downward. Further, the fixed insert 31 is fixedly attached to the guide member 9, and the movable insert 33 can be adjusted in position so as to correspond to the size of the workpiece W via a drive means such as a drive cylinder or a ball screw. 9 is attached.

  Further, a work table 39 on which a work W is placed is provided on the upper portion of the base 3, and a main body vise comprising a reference vise jaw 41 and a movable vise jaw 43 that can hold and fix the work W on the work table 39. A device 45 is provided. More specifically, the reference vise jaw 41 is provided in the reference vice line BL in the width direction of the workpiece W, and the movable vise jaw 43 is provided so as to be movable in a direction approaching and separating from the reference vise jaw 41.

  Next, a saw blade driving device 47 constituting the main part of the embodiment of the present invention will be described with reference to the drawings.

  1 and 3 together, the saw blade driving device 47 is a pillow type in which the shaft 25 of the driving wheel 21 is provided on the left side in FIG. 3 of the housing portion 15 as shown in FIG. The bearing is rotatably supported via a bearing 49, and the drive wheel 21 is inserted into the shaft 25 and connected and fixed via a key 51.

  Further, the shaft 25 protrudes to the back surface side (right side in FIG. 3) of the housing portion 15, and the saw blade driving unit 53 is connected to the protruding portion of the shaft 25 so as to drive the shaft 25 to rotate. 15 is provided on the back side. In this embodiment, the saw blade drive unit 53 includes a hollow reduction gear 55 and a saw blade motor 29 linked to the reduction gear 55, and is floating so as to be rotatable in the saw blade rotation direction. It has a structure.

  That is, in the saw blade drive unit 53, the speed reducer 55 is connected to the projecting portion of the shaft 25 via the key 57, and the holding member 59 provided at the tip of the projecting portion of the shaft 25 is used as shown in FIG. Direction is regulated. Further, the casing 61 of the speed reducer 55 has a floating structure that is rotatable in the saw blade rotation direction by a guide portion 63 provided on the back surface of the housing portion 15 as shown in FIG. For example, a guide groove 63A that is long in the circumferential direction around the shaft 25 is provided on the back surface of the housing portion 15, and a guide pin 63B that is engaged so as to be guided by the guide groove 63A is a casing 61 of the speed reducer 55. Is provided.

  Further, when the workpiece W is cut by the band saw blade B, a large impact (reaction force) such as cutting resistance or impact force is applied to the band saw blade B. The saw blade for absorbing and reducing the reaction force described above. A reaction power buffer 65 is provided on the back side of the housing portion 15.

  As shown in FIGS. 1, 2, 5, and 6, the saw blade reaction power buffer device 65 of the first embodiment includes, for example, a thick plate block torque arm 67 as the speed reducer. The torque arm 67 is provided with a notch window 69 so as to be positioned near and projecting, and the notch window 69 is provided with a buffer as a buffer. A buffer member 71 made of a resin material having elasticity such as urethane or rubber is fixed by a shaft 73. More specifically, in this embodiment, the buffer member 71 has a cylindrical shape as shown in FIG. 1, and the shaft 73 is inserted into the hole of the buffer member 71 and is held and fixed to the torque arm 67. Has been.

  Further, the engaging member 75 having, for example, a substantially semicircular engaging recess 75A as an engaging portion that engages with the outer periphery of the buffer member 71 is a side surface of the casing 61 of the speed reducer 55 (the left side surface in FIG. 1). ) With bolts BT.

  With the above configuration, the drive wheel 21 is rotated by the rotational drive of the saw blade motor 29, and the band saw blade B that is wound endlessly on the drive wheel 21 and the driven wheel 23 travels and rotates.

  The band saw blade B in the cutting region S is guided and supported vertically downward between the backup unit 35 of the fixed insert 31 and the backup unit 37 of the moving insert 33, and is a direction from the moving insert 33 side toward the fixed insert 31 side. The workpiece W fixed by the reference vise jaw 41 and the movable vise jaw 43 is cut by the band saw blade B as the saw blade housing 7 is lowered by the lifting hydraulic cylinder 11 while running and rotating.

  The torque of the saw blade motor 29 is transmitted to the band saw blade B by the rotation of the shaft 25 and the drive wheel 21 through the speed reducer 55. When the workpiece W is cut by the band saw blade B, if a large impact such as cutting resistance or impact force is applied to the band saw blade B, the band saw blade B may be damaged or cause vibration or noise. The power shock absorber 65 can reduce the reaction force such as the cutting resistance and the impact force as described above.

  That is, as described above, when a large impact load such as cutting resistance or impact force is applied to the band saw blade B, the reduction gear 55 and the saw blade motor 29 (that is, the saw blade drive unit 53) Since it is configured in a floating state in the blade rotation direction, a reaction force is generated in the direction opposite to the rotation traveling direction of the band saw blade B around the shaft 25, and as shown by a two-dot chain line in FIG. In the clockwise direction.

  Along with this, the engaging member 75 provided on the side surface of the casing 61 of the speed reducer 55 also rotates in the same direction, but the above-mentioned reaction is caused by the elasticity of the buffer member 71 with which the engaging recess 75A of the engaging member 75 is engaged. Power will be absorbed. Therefore, damage, vibration, noise, etc. of the band saw blade B that has conventionally occurred can be attenuated or prevented, which contributes to extending the life of the saw blade.

  When the reaction force is eliminated, the engagement member 75 is returned to the original position by the elastic force of the buffer member 71, so that the saw blade drive unit 53 is returned to the original position.

  Next, the saw blade reaction power shock absorber 77 of the second embodiment will be described with reference to the drawings. The same members as those in the first embodiment described above are described with the same reference numerals, and different parts will be mainly described. Detailed description of other similar parts is omitted.

  Referring to FIG. 7, the saw blade reaction power shock absorber 77 is a housing in which two torque blocks 79 are positioned close to the speed reducer 55 such that two torque blocks 79 oppose each other at a predetermined interval in FIG. The two torque blocks 79 are provided with guide hole portions (not shown), and a guide shaft 81 is slidably inserted into the guide hole portions. A nut member 83 serving as a stopper is screwed to both ends of the guide shaft 81 in a double manner.

  Further, an engaging member 85 is fixed substantially in the middle of the guide shaft 81, and a base portion of the engaging member 85 is fixed to a side surface (left side surface in FIG. 7) of the casing 61 of the speed reducer 55 with a bolt BT. Yes. Further, for example, springs 87A and 87B serving as buffer portions are wound on both the upper and lower sides of the guide shaft 81 in FIG. 7, and each of the springs 87A and 87B is provided on the side surface of the engaging member 85 and the inner side surface of the torque block 79. It is provided so that it may hit.

  With the above configuration, since a large impact such as cutting resistance or impact force is applied to the band saw blade B during the cutting of the workpiece W, the saw blade drive unit 53 rotates in the clockwise direction in FIG. The engaging member 85 provided on the side surface of the casing 61 of the speed reducer 55 also rotates in the same direction, but the reaction force is absorbed by the elastic force of the upper spring 87A in FIG. Therefore, the same effect as that of the first embodiment described above can be obtained. When the reaction force is eliminated, the engagement member 85 is returned to the original position by the elastic force of the upper spring 87A, so that the saw blade drive unit 53 is returned to the original position.

  Next, a saw blade reaction power buffer 89 according to a third embodiment will be described with reference to the drawings. The same members as those in the first embodiment described above are described with the same reference numerals, and different parts will be mainly described. Detailed description of other similar parts is omitted.

  Referring to FIG. 8, the saw blade reaction power buffer 89 includes a damper device of a spring 91 with a damper such as a gas spring as a buffer portion, and the upper side in FIG. 8 is located near the speed reducer 55. It is pivotally supported on the back surface of the housing portion 15. On the other hand, the engaging member 93 is fixed to the side surface (left side surface in FIG. 8) of the casing 61 of the speed reducer 55 with a bolt BT, and the tip of the engaging member 93 is pivoted to one end side of the spring 91 with damper. It is supported and connected.

  With the above configuration, since a large impact such as cutting force or impact force is applied to the band saw blade B when the workpiece W is cut, the saw blade drive unit 53 is rotated clockwise in FIG. Although the engaging member 93 provided on the side surface of the casing 61 of the speed reducer 55 also rotates in the same direction, the reaction force is absorbed by the elastic force of the spring 91 with a damper in FIG. Therefore, the same effect as that of the first embodiment described above can be obtained. When the reaction force is eliminated, the engagement member 93 is returned to the original position by the elastic force of the spring 91 with the damper, so that the saw blade drive unit 53 is returned to the original position.

  Next, a saw blade reaction power buffer 95 according to a fourth embodiment will be described with reference to the drawings. The same members as those in the first embodiment described above are described with the same reference numerals, and different parts will be mainly described. Detailed description of other similar parts is omitted.

  Referring to FIG. 9, a saw blade reaction power buffer 95 includes a vibration generator 97 that applies vibration to the saw blade drive unit 53, and this vibration generator 97 constitutes a so-called buffer section.

  As the vibration generating device 97, for example, a disk 99 as a rotating body is provided near the speed reducer 55 and is rotatably provided on the back surface of the housing portion 15 by a shaft 99A. It is rotationally driven by a small motor 101 linked to 99A. On the other hand, the engaging member 103 is fixed to the side surface (the left side surface in FIG. 9) of the casing 61 of the speed reducer 55 with a bolt BT, and one end of a connecting member 105 that forms a link member at the tip of the engaging member 103. Is supported, and the other end of the connecting member 105 is pivotally supported at one location on the outer peripheral side of the disk 99 to constitute a link mechanism.

  In FIG. 9, the disk 99 is illustrated as being connected to the small motor 101 on the near side of the paper surface, but actually, for example, the small motor 101 is connected to the shaft 99 of the disk 99 via a rotation transmission device. The connecting member 105 is reciprocally moved when the shaft support portion of the connecting member 105 and the disc 99 rotates as the disc 99 rotates.

  With the above configuration, the disk 99 is driven to rotate by the small motor 101, whereby the engaging member 103 is reciprocated via the connecting member 105. By this reciprocating motion, the casing 61 of the speed reducer 55 reciprocates in the rotational direction about the shaft 25, and minute vibrations are generated. As a result, the band saw blade B vibrates in the cutting direction, so that there is an effect that a large impact such as a cutting resistance or an impact force applied to the band saw blade B when the workpiece W is cut is weakened.

  In addition, by providing a cushioning material (not shown) such as rubber or urethane in the middle of the connecting member 105, the reaction force of the band saw blade B generated when cutting the workpiece W is more effective by the cushioning material. To be absorbed.

  In addition, this invention is not limited to embodiment mentioned above, It can implement in another aspect by making an appropriate change. In this embodiment, the horizontal band saw is described as an example of the saw, but a vertical band saw and other band saws may be used.

It is the schematic explanatory drawing which looked at the saw blade drive device of 1st Embodiment of this invention from the back surface. It is sectional drawing of the arrow II-II line | wire of FIG. It is sectional drawing which shows the shaft structure of a drive wheel. It is a front view of a horizontal type band saw machine used in an embodiment of the present invention. FIG. 5 is a rear view of FIG. 4. FIG. 5 is a right side view of FIG. 4. It is the schematic explanatory drawing which saw the saw-blade drive device of 2nd Embodiment of this invention from the back surface. It is the schematic explanatory drawing which saw the saw-blade drive device of 3rd Embodiment of this invention from the back surface. It is the schematic explanatory drawing which saw the saw-blade drive device of 4th Embodiment of this invention from the back surface.

Explanation of symbols

1 Horizontal band saw machine (saw machine)
3 Base 5 Guide post 7 Saw blade housing 11 Elevating hydraulic cylinder (saw blade cutting drive)
15, 17, 19 Housing portion 21 Drive wheel 23 Drive wheel 25, 27 Shaft 29 Saw blade motor 31 Fixed insert 33 Moving insert 47 Saw blade drive device 53 Saw blade drive unit 55 Reduction gear 59 Holding member 61 Casing (of reduction gear 55 )
63 Guide part 63A Guide groove 63B Guide pin 65 Saw blade reaction power shock absorber (of the first embodiment)
67 Torque arm 71 Buffer member (buffer part)
75 Engagement member 75A Engagement recess 77 Saw blade anti-power shock absorber (of the second embodiment)
79 Torque block 81 Guide shaft 83 Nut member (stopper part)
85 Engagement members 87A, 87B Spring (buffer part)
89 Saw blade anti-power shock absorber (in the third embodiment)
91 Spring with damper (damper device; shock absorber)
93 Engagement member 95 Saw blade reaction force shock absorber (fourth embodiment)
97 Vibration generator (buffer part)
99 disc (rotary body)
101 Small motor 103 Engagement member 105 Connection member (link member)

Claims (10)

The saw blade is wound in an endless manner on a drive wheel and a driven wheel that are rotatably supported on the saw blade housing, and the drive blade is driven to rotate by a saw blade drive unit so that the saw blade travels and rotates. In a saw blade driving method in a saw machine that cuts a work material with a saw blade,
The saw blade drive unit is connected to the shaft of the drive wheel in a floating state in the saw blade rotation direction with respect to the saw blade housing, and the saw blade of the saw blade drive unit is connected through a buffer provided in the saw blade housing. A method for driving a saw blade in a saw machine, wherein a rotational direction is restricted and a reaction force generated by the saw blade drive is attenuated by the buffer portion.   2. A saw blade driving method in a saw machine according to claim 1, wherein the buffer portion is made of a resin material having elasticity.   The saw blade driving method in the saw machine according to claim 1, wherein the buffer portion is a striated body.   The saw blade driving method in a saw machine according to claim 1, wherein the buffer portion is a damper device.   The saw blade driving method for a saw machine according to claim 1, wherein the buffer portion is a vibration generating device that vibrates the saw blade driving unit. The saw blade housing is provided with a saw blade wound endlessly on a drive wheel and a driven wheel that are rotatably supported on a saw blade housing, and a saw blade drive unit that rotationally drives the drive wheel to cause the saw blade to travel and rotate. In a saw blade driving device in a saw machine configured to cut a work material with a traveling rotating saw blade,
The saw blade drive unit is provided in a floating structure connected to the shaft of the drive wheel in a floating state in the saw blade rotation direction with respect to the saw blade housing, and regulates the saw blade rotation direction of the saw blade drive unit and the saw blade A saw blade driving device in a saw machine, wherein a buffer portion for damping reaction force generated by driving is provided in the saw blade housing.   The saw blade driving device in a saw machine according to claim 6, wherein the buffer portion is made of a resin material having elasticity.   The saw blade driving device for a saw machine according to claim 6, wherein the buffer portion is formed by a striated body.   The saw blade driving device for a saw machine according to claim 6, wherein the buffer portion is constituted by a damper device. The saw blade driving device in a saw machine according to claim 6, wherein the buffer portion is constituted by a vibration generating device that vibrates the saw blade driving unit.

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