JP3203208B2 - Material feeder of saw cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material feeder for intermittently feeding a long work to be cut to a cutting position in a saw cutter such as an automatic circular saw cutter or an automatic band saw cutter.

[0002]

2. Description of the Related Art In general, in an automatic circular saw cutter or an automatic band saw cutter used for fixed length cutting of a long work such as a bar, a pipe, an extruded material, the work is intermittently fixed to a cutting position. A material feeding device for fine feeding is attached. In this material feeder, for example, as shown in FIGS. 8 (a) and 8 (b), a feed table 10 in which a movable vise 2 and a fixed vise 3 are arranged on both left and right sides of a work mounting portion 10a is parallel to the work feed direction. The long work W is supported by a pair of horizontal guide shafts 11 and 11 and movably connected to a ball screw 12, and is moved forward and backward by the forward / reverse rotation of the ball screw 12 to move the feed table 10. Is set, and the work W placed on the work placement portion 10a is set.
Is clamped between the two vice 2 and 3,
Is advanced from the retreat position, so that the front end of the work W projects a required length from the cutting position P indicated by the dashed line in FIG. 8A, and the work W is inserted into a cutting vise of a cutting machine body (not shown). While being fixed and cut by the saw blade, the clamp is released and the feed base 10 is retracted, and after cutting, the operation of clamping and moving forward again is repeated.

A support block 10b is integrally formed on the movable vice 2 side of the feed base 10, and a guide rod 21 having one end fixed to the movable vise 2 slides in a guide hole 13 provided in the support block 10b in a work width direction. The telescopic rod 14a of the hydraulic cylinder 14 attached to the support block 10b is movably inserted, and is arranged in parallel with the guide rod 21 so that the distal end is connected to the movable vice 2. The work W is clamped and released by driving the cylinder 14 to move in the near and far directions with respect to the fixed vise 3. However, the remaining portion of the work W, which becomes shorter with the progress of the fixed-size cutting, becomes an unused residual material at a stage where it becomes impossible to clamp at the retreat position of the feed plate 10. In order to increase the material utilization efficiency by shortening the length, the two vises 2 and 3 are generally long in the workpiece feed direction as shown in the drawing so as to approach the cutting position P.

Reference numeral 22 denotes a workpiece detecting contact, which is disposed in a recess 2a provided in the clamp surface 20 near the front end of the movable vise 2 and is always urged in a projecting direction by a spring member (not shown). When the work W is clamped between the vises 2 and 3, the presence or absence of the work W between the two vises 2 and 3 is detected by contacting the surface of the work W and changing the state from the projecting state to the non-projecting state. In this example, both vice 2,
One of the three is a fixed vice, but there is also one in which both are movable.

[0005]

However, in the fixed-size cutting of a long work by a conventional saw cutter, the length between both ends of a cut product taken from a portion near the rear end of the work is larger than a set size. The lengthening phenomenon is remarkably observed, which causes a decrease in quality and a decrease in yield due to defective products.Therefore, there is a problem that the material utilization efficiency cannot be sufficiently increased even if the unused residual material is shortened as described above. Was.

[0006] In order to find a means for improving the material utilization efficiency in the fixed-size cutting of a long work by a saw cutting machine, the present inventors first made a cut obtained from a portion near the rear end of the work as described above. The cause of the length of the product being longer than the set size was investigated. As a result, the rear end e of the shortened work W
Is indicated by a two-dot chain line in FIG.
Comes forward from the connection position with the telescopic rod 14a, and the margin for gripping the work W by the two vises 2 and 3 decreases.
As shown in FIG.
(A) Although an eccentric load is applied in the rotation direction as indicated by an arrow a, the movable vice 2 itself having a long shape is bent, and the movable vice 2 itself is bent between the support block 10b and the telescopic rod 14a and the guide rod 21 penetrating therethrough. In the conventional material feeder, the movable vice 2 is moved by the above-mentioned eccentric load.
8 is tilted and displaced with the clamp portion as a fulcrum as shown by a two-dot chain line in FIG. 8 (a), and the work W is pushed out further forward with this displacement, and the work feed length becomes longer than the set dimension. There was found.

[0007] Based on the above findings, the present invention provides a material feeder for a saw cutting machine, which can cut a long workpiece in a fixed size even when the cutting position is near the rear end of the workpiece. It is an object of the present invention to provide a material that can be cut with high precision and that can improve material use efficiency with high quality and high yield.

[0008]

According to a first aspect of the present invention, there is provided a material feeder for a saw cutting machine according to the present invention. A feed base 10 that can move forward and backward with respect to the position P,
A pair of vises 2, at least one of which is a movable vise 2,
3, a linear guide 21 for supporting the movable vice 2 so as to be able to move forward and backward, and a fluid pressure cylinder 14 for driving the movable vice 2 to move forward and backward. The long work W clamped between the two vises 2 and 3 is fed. A material feeder (1) for intermittently feeding a cutting position (P) to a cutting position (P) by advancing and retreating a table (10). 4, a lock mechanism 5 for fixing the stopper rod 4 immovably in the axial direction, and retraction urging means 6 for constantly urging the stopper rod 4 in the retreating direction of the movable vise 2 are provided. The movable vise 2 at the time of forward movement
In contrast, a configuration is adopted in which a locking portion 4a is provided which engages at a position on the rear side in the workpiece feed direction from the connection position between the movable vice 2 and the telescopic rod 14a of the fluid pressure cylinder 14. Things.

In the material feeding apparatus 1 having the above-described structure, normal fixed-size feeding is performed while the lock mechanism 5 of the stopper rod 4 is released while the work W is long. During this time, since the stopper rod 4 is urged in the retreating direction by the retraction urging means 6, the locking portion 4a is always in engagement with the movable vise 2 and clamps and releases the workpiece W. As the movable vice 2 moves forward and backward, the movable vice 2 moves forward and backward integrally. When the work W becomes shorter than the predetermined length with the progress of the fixed-size cutting, the stopper rod 4 cannot be moved in the axial direction by the operation of the lock mechanism 5 while the movable vise 2 is clamping the work W. When the clamp is released, only the movable vise 2 is retracted when the clamp is released, and the locking portion 4a of the stopper rod 4 is held at a position where it is engaged with the movable vise 2 at the time of clamping.

Accordingly, the rear end e of the shortened work W comes forward of the connecting position of the fluid pressure cylinder 14 with the telescopic rod 14a, and the work allowance of the work W by the two vises 2 and 3 is reduced, so that the fluid W Even if the movable vise 2 is biased in the rotational direction by the pressing force of the pressure cylinder 14, the movable vise 2 is prevented from being tilted and displaced around the clamp portion by the engagement with the locking portion 4a of the stopper rod 4. In addition, the clamp surface 20 keeps a proper posture parallel to the work feeding direction, so that the work W is not excessively pushed forward, and the work feeding length is as set.

According to a second aspect of the present invention, in the material feeder 1 of the first aspect, the work table is fed to the feed base 10 more than the connecting position between the movable vise 2 and the tip of the telescopic rod 14a of the fluid pressure cylinder 14. Work detecting means 7a and 7b for detecting the presence or absence of the work W at the position on the rear side in the direction are provided. Therefore, the rear end e of the work W, which is shortened with the fixed-size cutting, is connected to the work detection means 7a,
7b, it is detected by the work detecting means 7a, 7b, and based on this detection, the lock mechanism 5 is operated and the stopper rod 4 is moved.
May be fixed so as not to move in the axial direction.

According to the third aspect of the present invention, in the first or second aspect,
In the material feeding device 1, the lock mechanism 5 includes a tapered collet 50 having a tapered outer peripheral portion 50a and fitted outside the stopper rod 4, and a tapered collet 50 having a tapered inner peripheral portion 51a. The clamping cylinder 51 is fitted to the outside of the cylinder 50 and displacement means 52a and 52b for displacing the clamping cylinder 51 in the axial direction.
Is displaced in a direction in which the tapered inner peripheral portion 51a rides on the tapered outer peripheral portion 50a of the tapered collet 50, thereby reducing the diameter of the tapered collet 50 and fixing the stopper rod 4 so as to be immovable in the axial direction. In this case, since the fixing force of the stopper rod 4 due to the diameter reduction of the taper collet 50 is very strong, the movable vise 2
Even if the eccentric load applied to is large, the tilting displacement is surely prevented.

According to a fourth aspect of the present invention, in the material feeding apparatus 1 according to any one of the first to third aspects, the two vises 2 and 3 have a shape that is long in a workpiece feeding direction, and the movable vise 2 is provided with the fluid The linear guide 21 is supported between the telescopic rod 14a of the pressure cylinder 14 and the stopper rod 4. in this case,
Since the two vises 2 and 3 are long in the workpiece feeding direction, the two vises 2 and 3 at the forward position of the feed table 10 can be brought closer to the cutting position P, and the length of the unused remaining material of the workpiece W can be shortened. Further, since the long movable vise 2 is supported at three positions in the front and rear and the middle and guided in a linear motion, a well-balanced and stable operability can be obtained in the forward and backward movements. The gripping amount of the work W is reduced, and the stopper rod 4
When the lock mechanism 5 is operated, the point of action of the pressing force of the fluid pressure cylinder 14 is close to the fulcrum (clamp position) of the tilting displacement of the movable vise 2 due to the eccentric load, whereas the locking position of the stopper rod 4 is Since it is far from the fulcrum, the stopper rod 4 can be securely fixed even if the locking force of the lock mechanism 5 is small.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a material feeder for a saw cutter according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a vertical sectional side view of a material feeding device 1, FIG. 2 is a plan view of a main part of the device, and FIG. 3 is a sectional view taken along line AA of FIG.

As shown in FIGS. 1 to 3, the material feeder 1 includes a front mount 1a and a rear mount 1 on the side of the saw cutting machine 8 side.
b, two horizontal guide rods 11, 11 which slidably support the feed base 10 are arranged in parallel, and a ball screw which is screwed into the feed base 10 located below the middle of the two horizontal guide rods. Numerals 12 are rotatably mounted on both ends via bearings 15a and 15b, and the ball screw 12 is rotated forward and reverse by a drive mechanism (not shown) via a gear 16 fixed to the rear end of the feed base. 10 moves forward and backward in the front-rear direction, that is, in the workpiece feed direction.

The feed table 10 is provided with a fixed vise 3 long in the work feeding direction on one side in the width direction of the work mounting portion 10a on which the long work W is mounted, and is connected to the fixed vise 3 on the other side. An L-shaped support block 10b for supporting the opposing movable vice 2 is integrally formed. On the support block 10b, a hydraulic cylinder 14 is fixedly mounted on the outer surface on the front side, and a lock cylinder 17 with a built-in lock mechanism 5 is fixed on the side end surface on the rear side, based on the workpiece feed direction. A guide hole 13 extending in the width direction of the work is formed in the intermediate portion. Thus, a round shaft-shaped guide rod 21 is fitted in the guide hole 13, and a round bar-shaped stopper rod 4 is fitted in the lock cylinder 17 so as to be able to advance and retreat in parallel with each other.

Further, the feed base 10 is provided with a work detecting means, which is located slightly behind the rear end of the movable vise 2 in the work feed direction, and in which the light emitter 7a and the light receiver 7b sandwich the work transfer path. The presence or absence of the work W is detected by the presence or absence of interruption of light projected from the light emitter 7a to the light receiver 7b. In addition, 18a is a guide roller provided at the rear end of the feed stand 10, 18b is a guide roller provided at the upper part of the rear mount 1b, 19
Denotes an oil guide pipe for the hydraulic cylinder 14 and the lock cylinder 17.

The movable vise 2 has a rectangular rod shape long in the workpiece feed direction, and is connected at its intermediate portion to a distal end of the guide rod 21 via a connecting pin 21a, and is thereby held by the support block 10b so as to be movable forward and backward. At the same time, the front end of the telescopic rod 14a of the hydraulic cylinder 14 that penetrates the support block 10b at a position close to the front is connected via screws 14b and 14b. By moving back and forth in the direction, the long work W arranged on the work mounting portion 10a is clamped by being clamped between the fixed vice 3 and released.

The stopper rod 4 has a front end inserted into a through hole 2b provided on the rear end of the movable vice 2 and a flange-shaped locking portion 4a formed at the front end of the stopper rod 4 at the front end of the through hole 2b. The movable vice 22 is set so as to engage with the provided annular step portion 23 in the forward direction of the movable vise 22, and the flange portion 4b formed at the rear end and the lock cylinder 17 are formed.
A compression coil spring 6 as retraction urging means is wound around the annular recess 61 on the outer end surface, and is normally urged in the retraction direction by the compression coil spring 6.

As shown in FIG. 4, inside the lock cylinder 17, a tapered collet 50 having a tapered outer peripheral portion 50a at the front side is screwed to the rear end plate 17b at the rear side and externally fitted to the stopper rod 4. A tightening cylinder 51 having a tapered inner peripheral portion 51a on the front side is fitted on the outside of the tapered collet 50 so as to be axially displaceable, and the front and rear end plates 17a, 1
7b, oil passages 52a and 52b communicating with the inside and outside of the cylinder, respectively.
Are formed, and these constitute a lock mechanism 5 of the stopper rod 4. An O-ring 53 is provided between the outer peripheral surface of the tightening cylinder 51 and the inner peripheral surface of the lock cylinder 17.

When hydraulic oil is introduced into the cylinder rear chamber 54b from the oil passage 52b side while the oil passage 52a is open, the lock mechanism 5 displaces the tightening cylinder 51 forward by the oil pressure, and the locking cylinder 51 When the tapered inner peripheral portion 51a of FIG. 3 rides on the tapered outer peripheral portion 50a of the tapered collet 50, the tapered collet 50 is tightened and reduced in diameter to lock the stopper rod 4 immovably. By opening 52b and introducing hydraulic oil from the oil passage 52b side to the cylinder front chamber 54a,
The tightening cylinder 51 is displaced backward to loosen the tightening of the taper collet 50, and the taper collet 50 expands its diameter to unlock the stopper rod 4.

As shown in FIGS. 1 and 5, the movable vise 2
A swinging piece 24 is rotatably mounted on the upper surface side of the swinging piece 24 via a pivot 24a, and a triangular bar-shaped work detecting contact 22 perpendicular to one end of the swinging piece 24 is fixed at the upper end. The movable vise 2 is disposed in a recess 2 a provided in the clamp surface 20 near the front end. Further, a spring retaining pin 26a, a stopper pin 27, and a proximity switch 28 are respectively attached to a bracket 25 having an L-shape in plan view fixed to the upper surface of the rear end side of the movable vise 2, and the spring retaining pin 26b and the swinging piece are provided. A tension coil spring 26 is engaged with the other end of the coil 24. Reference numeral 29 denotes a cover that covers the upper surface of the movable vise 2. Thus, in the oscillating piece 24, when the movable vise 2 is in the non-clamped state, the work detection contact 22 at one end protrudes from the clamp surface 20, as indicated by the imaginary line in FIG.
The other end is in a posture in contact with the stopper pin 27, but in the same clamped state, the contact 22 comes into contact with the surface of the work W and retreats into the recess 2a, and is changed to a posture shown by a solid line in FIG.
The proximity switch 28 is turned on / off by the displacement of the other end due to the change in the posture, and the presence or absence of the work W between the two vises is detected.

As shown in FIGS. 1 and 2, a fixed vice 81 is continuously provided on one side of a work receiving portion 80 at a cutting position P, and a hydraulic cylinder 82 is provided on the opposite side.
A movable vise 83 that moves forward and backward with respect to the fixed vise 81 is disposed through the workpiece. The slit that allows a saw blade such as a circular saw to enter the work receiving portion 80 and the fixed vise 81 along the cutting position P. The movable vise 83 is provided with a similar slit 84b. In addition,
The front side of the slit 84a of the work receiving portion 80 constitutes a cut product discharging portion 80a whose upper surface is inclined.

In order to cut a long work W into a fixed size by the saw cutting machine having the above-described configuration, the work W carried into the material feeder 1 is transferred to the work placing portion 10a of the feed base 10 and the guide rollers 18a, 18b. The work W is clamped by clamping the front part of the work W between the two vises 2 and 3, and the moving stroke of the feed base 10 is set to match the cutting length. Advance to the previous limit,
The front end of the work W is connected to both the vise 81, 8 on the cutting machine body 8 side.
In this cutting, the clamp on the side of the feed base 10 is released and the feed base 10 is retracted to the end of the stroke during the cutting. The operation of clamping and releasing the clamp on the side of the cutting machine body 8 after cutting and moving the feed table 10 forward to the stroke end, and performing cutting in the same manner as described above, is repeated.

From the start of the fixed-size cutting until the remaining portion of the workpiece W reaches a predetermined length, the feed base 1
The lock mechanism 5 of 0 is set to the released state and the fixed-size feeding is performed. During this time, since the stopper rod 4 is urged in the retreating direction by the compression coil spring 6, the locking portion 4 a is always engaged with the annular step portion 23 of the movable vise 2, and the clamp of the work W is performed. As the movable vice 2 performs the clamp release, the movable vice 2 moves integrally with the movable vise 2 as shown by the solid line and the virtual line in FIG. The movable vice 2 in the unclamped state is shown in a form far away from the workpiece W for easy understanding in FIGS. 6 and 7 described below. In practice, it is only necessary to separate the work W slightly (about several mm) from the work W.

Thus, when the remaining portion of the work W becomes shorter with the progress of the fixed-size cutting, and the rear end e exceeds the detection position by the light emitter 7a and the light receiver 7b as shown in FIG. On the basis of the detected signal, the lock mechanism 5 operates under the clamped state of the movable vise 2 (the imaginary line in the figure) to lock the stopper rod 4 so that it cannot advance or retreat. As a result, in the subsequent fixed-size feeding, only the movable vise 2 moves forward and backward, but since the stopper rod 4 is locked under the clamped state of the movable vise 2 as described above, the movable vise 2 is moved to the clamp position. When moving forward, the annular stepped portion 23 engages with the locking portion 4 a of the stopper rod 4.

Therefore, as shown in FIG. 7B, the rear end e of the shortened work W comes forward from the connecting position of the fluid pressure cylinder 14 with the telescopic rod 14a, and
3 reduces the work allowance of the workpiece W, and even if a biased load in the rotating direction is applied to the movable vise 2 by the pressing force of the fluid pressure cylinder 14 as shown by an arrow a in FIG. Due to the engagement, the movable vise 2 does not tilt and displace with the clamp portion as a fulcrum, and the clamp surface 20 maintains an appropriate posture parallel to the work feeding direction, thereby preventing the work W from being pushed out excessively forward, and The feed length is maintained as set. As a result, even if the cutting position is near the rear end of the workpiece W, the workpiece W can be cut with high accuracy according to the set dimensions, and a high-quality cut product with excellent dimensional accuracy can be stably obtained. Good and high material utilization efficiency can be achieved.

In particular, in this embodiment, the two vises 2 and 3 of the feed base 10 are long in the workpiece feed direction, and the two vises 2 and 3 at the forward position of the feed base 10 are brought closer to the cutting position P, and Since the length of the unutilized residual material of W can be shortened, the material use efficiency can be further improved, and the long movable vice 2 can be extended by the telescopic rod 14 of the hydraulic cylinder 14.
a, the guide rod 21 and the stopper rod 4 support the linear motion at three positions in the front-rear and middle directions, so that the linear motion is well balanced, and a stable operability is obtained. In addition, both vice 2,
3, when the lock margin 5 of the stopper rod 4 is operated as described above,
The point of action of the pressing force of the fluid pressure cylinder 14 is close to the fulcrum (clamp position) of the tilting displacement of the movable vise 2 due to the unbalanced load, whereas the locking position by the stopper rod 4 is far from the fulcrum. The stopper rod 4 can be securely fixed even if the locking force is small.

In the above embodiment, the pair of vice of the material feeder 1 is composed of the movable vise 2 and the fixed vise 3. However, both vice may be movable vise. In this case, A stopper rod 4 similar to the above and a lock mechanism 5 thereof may be provided for each of the two movable vise. Thus, the movable vise 2 may be configured to operate with an air cylinder. Further, the stopper rod 4 does not penetrate the movable vise 2 as in the embodiment, but the locking portion 4a on the distal end side.
Only the movable vise 2 may be set to engage with the movable vise 2 at the time of forward movement. The structure of the locking portion 4a and the engagement structure on the movable vise side can be variously set. On the other hand, as a linear guide that supports the movable vice 2 so that it can move forward and backward,
The structure is not limited to the illustrated structure including the guide rod 21 and the guide hole 13, and various structures such as a structure in which the movable vise 2 is slidably fitted to a guide rail fixed to the feed base 10 can be adopted.

Further, a work detecting means for automatically setting a time when the lock mechanism 5 is operated, a stopper rod 4
Various configurations other than the embodiment can also be adopted for the backward biasing means for biasing in the backward direction. For example, as the work detecting means, an optical sensor, a touch sensor, a proximity switch, or the like utilizing other light characteristics such as light reflection can be used instead of the illustrated light emitting device 7a and light receiving device 7b, and the detection position thereof can be used. The position is not limited to the position deviating rearward from the movable vise 2 as in the embodiment, but may be set between the rear end of the movable vise 2 and the connecting portion of the hydraulic cylinder 14 with the telescopic rod 14a. The lock mechanism 5 is not limited to the configuration of the embodiment, but the configuration using the taper collet 50 and the tightening cylinder 51 as in the embodiment is excellent in the operability of locking and unlocking, and the fixing strength of the stopper rod 4. Therefore, there is an advantage that the tilting displacement can be reliably prevented even when the bias load applied to the movable vise 2 is large.
It should be noted that displacement means other than the hydraulic pressure can be used for displacement of the tightening cylinder 51.

In addition, in the present invention, both vice 2,
The design of the detailed configuration can be variously changed in addition to the embodiment, for example, by making the clamp surface side of 3 have an uneven shape according to the work outer shape, and making the work mounting portion 1a a roller. The saw cutting machine body may be any of a circular saw cutting machine and a band saw cutting machine, and there is no particular limitation on the structure of the vice, the driving mechanism, the structure of the work receiving portion, and the like.

[0032]

According to the first aspect of the present invention, as a material feeder of a saw cutting machine, in fixed-size cutting of a long work, a cutting position is a portion near a rear end of the work, and a vise of a feed table is provided. Even if the work allowance is reduced, the stopper rod lock can reliably prevent the tilting displacement due to the eccentric load of the movable vise.Therefore, there is no error in the feed dimension, and cutting can be performed with high accuracy according to the set dimensions. Thus, it is possible to stably obtain a high-quality cut product having excellent dimensional accuracy, provide a good yield, and achieve high material use efficiency.

According to the second aspect of the present invention, when the rear end of the work, which is shortened due to the fixed-size cutting, reaches forward from a predetermined position, the material feeder detects the work by the work detecting means. The locking mechanism of the stopper rod can be automatically operated based on this detection signal, thereby providing a simple structure and easy control.

According to the third aspect of the present invention, in the above-mentioned material feeder, the operability and the lock strength of the stopper rod locking mechanism are excellent, and the tilt displacement can be ensured even when the eccentric load applied to the movable vise of the feed base is large. Therefore, there is an advantage that a high-quality cut product having excellent dimensional accuracy can be more stably obtained, particularly for a workpiece requiring a large clamping force, such as a large-diameter metal bar.

According to the fourth aspect of the present invention, in the above-mentioned material feeding device, since both the vise of the feed base are long in the work feeding direction, the length of the unused remaining material of the work can be shortened, and the length can be increased. A well-balanced and stable operability can be obtained in the reciprocating movement of the movable vise.In addition, when the work for gripping the work by the two vice is reduced and the lock mechanism of the stopper rod is operated, the stopper rod is small even if the lock force of the lock mechanism is small. There is an advantage that can be securely fixed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a saw cutting machine provided with a material feeding device according to one embodiment of the present invention.

FIG. 2 is a plan view of a feed base portion of the material feed device.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a longitudinal side view of a lock cylinder portion of the feed base.

FIG. 5 is a plan view of a movable vice portion in the feeder.

FIG. 6 is a plan view showing a normal fixed-size feeding state of a workpiece by the feed table.

FIG. 7 shows a fixed-size feeding state when the remaining portion of the work is shortened by the feed table. FIG. 7A is a plan view showing a clamp released state immediately after locking of a stopper rod.
(B) is a plan view in a state where only the rear end of the work is clamped.

8A and 8B show a conventional material feeder, wherein FIG. 8A is a plan view of the workpiece in a fixed-size feed state, and FIG. 8B is a longitudinal sectional front view of the same material feeder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Material feeder 10 Feed stand 10a Work mounting part 10b Support block 11 Guide shaft 12 Ball screw 13 Guide hole (linear guide) 14 Hydraulic cylinder (fluid pressure cylinder) 14a Telescopic rod 17 Lock cylinder 2 Movable vise 2b Through hole 20 Clamp Surface 21 Guide rod (linear guide) 23 Annular step 3 Fixed vice 4 Stopper rod 4a Locking part 5 Lock mechanism 50 Tapered collet 50a Tapered outer peripheral part 51 Tightening cylinder 51a Tapered inner peripheral part 52a Oil passage (displacement of tightening cylinder) Means) 52b Oil passage (means for displacing the tightening cylinder) 6 Compression coil spring (retraction urging means) 7a Light emitting device (work detecting means) 7b Light receiving device (work detecting means) 8 Saw cutter main body P Cutting position W Long work e trailing edge

Claims (4)

(57) [Claims] 1. A pair of vice, at least one of which is a movable vise, a linear guide that supports the movable vise so as to be able to advance and retreat, and a movable guide, the movable vice being movable forward and backward with respect to a cutting position of a saw cutter. A fluid pressure cylinder for driving the vise forward and backward is provided, and a material feeder that intermittently feeds a long workpiece clamped between the two vices to a cutting position by advancing and retreating the feed base, wherein the feed base includes: A stopper rod held axially movable along the moving direction of the movable vise, and a lock mechanism for fixing the stopper rod immovable in the axial direction;
Retraction urging means for constantly urging the stopper rod in the retreating direction of the movable vise is provided, and at the distal end side of the stopper rod, expansion and contraction of the movable vise and the fluid pressure cylinder with respect to the movable vise at the time of forward movement. A material feeding device for a saw cutting machine, comprising: a locking portion that is engaged at a position on the rear side in a work feeding direction from a connecting position with a rod. 2. A feed detecting means for detecting the presence or absence of a work at a position on the rear side in the work feed direction from a connection position between the movable vise and the distal end of a telescopic rod of a fluid pressure cylinder is provided on the feed table. A material feeding device for a saw cutting machine according to claim 1. 3. The locking mechanism includes a tapered collet having a tapered outer peripheral portion and fitted outside the stopper rod, and a tightening having a tapered inner peripheral portion fitted outside the tapered collet. A cylinder, and a displacement means for axially displacing the tightening cylinder. The taper collet is reduced in diameter by displacing the tightening cylinder in a direction in which the tapered inner peripheral portion rides on the tapered outer peripheral portion of the tapered collet. 3. The material feeding device for a saw cutting machine according to claim 1, wherein the stopper rod is fixed so as not to move in the axial direction. 4. The linear guide according to claim 1, wherein said two vice are long in a workpiece feeding direction, and a movable vise is supported by said linear guide at an intermediate position between a telescopic rod of said fluid pressure cylinder and said stopper rod. 4. The material feeding device for a saw cutting machine according to any one of 3.