JP3337637B2 - Bar feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar feeder for feeding a bar to a bar processing apparatus such as an NC automatic lathe, and more particularly, to a guide rail body for guiding a bar. The present invention relates to a so-called oil-type bar feeder whose inside is filled with oil.

[0002]

2. Description of the Related Art There is known a bar feeder configured to automatically feed a long bar to a bar processing apparatus such as an NC automatic lathe for cutting a tip portion of a bar. ing.
The bar feeder has a gutter-shaped guide rail body that opens straight upward and extends straight toward the bar processing device for feeding the bar to be processed to the bar processing device. The rear end of the bar is gripped by a finger chuck provided at the tip of a feed arrow, and the front end of the bar is gripped by a collet chuck of a bar processing apparatus. While the bar is rotating at a high speed, the feed arrow moves forward and backward in the guide rail, so that the bar extends along the bar feed axis which coincides with the processing center axis of the bar processing apparatus or the center axis of the collet chuck. It is fed to the processing equipment.

[0003] When the bar is a particularly thin bar, the rear end gripped on the feed axis by the finger chuck at the tip of the feed arrow and the front end gripped by the collet chuck of the bar processing apparatus. The intermediate portion between them may be bent by its own weight, or the shape of the bar may be originally bent. If the bar is rotated at high speed in this state, the bar is hit against the inner wall surface of the guide rail to generate vibration and noise, and when the bar vibrates, the bar cannot be machined precisely. Conventionally, a so-called oil-type bar feeder has been known as a bar feeder devised so as to reduce vibration and noise during such bar processing. For example, in a conventional oil-type bar feeder, the feed passage, which is a complete liquid-tight closed space, is filled with oil, and the bar rotates around the bent or bent intermediate portion of the bar. In this case, the oil floats toward the feed axis by the hydrodynamic centripetal action of the oil, so that the contact between the bar and the guide rail is prevented.

[0004]

However, the above-mentioned bar feeder having a completely liquid-tight feed passage has a precisely formed guide rail body and a lid member which are tightly engaged with each other. A complicated opening and closing mechanism for the lid member is required, which causes an increase in manufacturing cost. In addition, when the bending or bending of the bar is large or the rotation speed of the bar is low, the bent or bent portion of the bar cannot be lifted to the feed axis, and vibration and noise are reduced. In some cases, it cannot be reduced. Therefore, an object of the present invention is to provide a bar feeder having a simple structure that can more effectively prevent vibration and noise of the bar, and can process the bar more precisely. It is in.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a feed rod for feeding a bar supplied from an upper region into a feed passage of a horizontally extending guide rail body with a processing axis of a bar processing apparatus by a feed arrow. A bar member feeder that feeds the bar material processing device along the feeding axis line, the cover member being capable of opening and closing the upward opening of the guide rail body; An oil supply means for supplying oil, and a bar support member extending vertically through a bottom wall of the guide rail main body, and having an upper end portion capable of appearing and retracting in the feed passage; When the upper end of the bar supporting member projects into the feed passage, the lower axis of the bar in the feed passage is supported, and the central axis of the bar is moved toward the feed axis. , Which can be achieved by the bar feeder .

In the present invention, by projecting the upper end of the bar supporting member into the feed passage, the lower end surface of the bar in the feed passage is supported by the upper end surface, and the center axis of the bar is adjusted. Move closer to the feed axis. The projecting amount of the bar supporting member into the feed passage is set so that the center axis of the bar can be raised to a height substantially coincident with the feed axis. Even if the bar is continued to be supported by the upper end surface of the member, and the center axis of the bar can be lifted to a height slightly below the feed axis, and the bar is straightened. By rotating the rod and forming a layer of oil between the upper end surface of the rod supporting member and the rod by rotation of the rod, the rod is levitated by the hydrodynamic centripetal action of the oil, and The central axis may be substantially coincident with the feed axis.

During the processing of the bar, the front end of the bar is supported by the collet chuck of the bar processing apparatus, and the rear end is supported by the finger chuck of the feeder. The intermediate portion of the bar is bent by its own weight. In some cases, the shape of the bar is originally bent. In such a case, the center axis of the bar is brought closer to the feeding axis by the bar supporting member, and the bar can be rotated in a state as straight as possible. Thereby, vibration and noise caused by the intermediate portion of the bar being hit against the inner wall of the feed passage of the guide rail by the rotation of the bar can be reduced, and
Bars can be processed more precisely.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the present invention will be described. FIG. 1 is a side view schematically showing an entire bar feeder according to the present embodiment, and FIG. 2 is a plan view thereof. FIG. 3 is a sectional view taken along the line III-III shown in FIG. FIG.
1 shows a bar lifting mechanism according to the first embodiment of the present invention. 5 and 6 are sectional views taken along the line V-V shown in FIG. 4, in which FIG. 5 shows a state in which a bar having a maximum diameter is being fed, and FIG. This shows a state in which the bar is being fed. As shown in FIG. 1, the bar feeder 2
It is arranged adjacent to an NC automatic lathe N arranged in front of the bar feeder 2. The bar feeder 2 includes: a base 6 supported by a stand 4; and a bar W supported by the base 6 and extending straight toward the NC automatic lathe N. And a guide rail 8 for guiding. Further, the bar feeder 2 has four bar lifting mechanisms 10 provided at intervals from each other along the guide rail 8. During the bar processing, the front end of the bar W is supported by a collet chuck of the bar processing apparatus, and the rear end is supported by a finger chuck 12a of a feed arrow 12 described later. The bar W may be bent by its own weight, or the shape of the bar W may be originally bent. In such a case, the bar lifting mechanism 10 supports and lifts the intermediate portion of the bar W from below, and moves the center axis of the bar W closer to the feed axis OO to move the bar W as much as possible. It is designed to rotate in a straight state. Details of the bar lifting mechanism 10 will be described later.

A feed arrow 12 for feeding the bar W to the NC automatic lathe N is accommodated in the guide rail body 22. A finger chuck 12 a for gripping the rear end of the bar W is provided at the tip of the feed arrow 12. At the rear end of the feed arrow 12, a so-called "blade portion" extending horizontally outward from an upward opening of the gadrail body is attached, and an endless chain (not shown) is connected to the blade portion. Have been. A servo motor 1 with an encoder 14 is provided at the rear end of the guide rail 8.
6 is mounted, and the endless chain is driven by a servomotor 16 via a sprocket to feed
2 moves back and forth within the guide rail 8. At this time, the encoder 14 transmits a pulse signal corresponding to the moving amount of the endless chain, that is, the moving distance of the blade portion of the feed arrow 12 to the controller 18, and detects the position of the feed arrow 12 in the guide rail main body 22. I do.

[0010] As shown in FIG.
The front end of the bar 2 has four rollers for gripping the bar W. The bar wobbling device 2 for preventing the bar W from swaying.
0 is provided to suppress the deflection of the bar W during the rotation of the bar.
As shown in FIG. 3, the guide rail 8 has a guide rail main body 22 and a lid member 24. Guide rail body 22
Is a substantially U-shaped recess which opens upward to receive a bar W taken out from a material shelf (not shown) of the bar W provided adjacently and which constitutes a feed passage P for the bar W. 22
It has a gutter-like shape having a. A curved concave portion 24a extending in the longitudinal direction is also formed on the surface of the lid member 24 facing the guide rail main body 22. Lid member 2
Numeral 4 is movable between a closed position (shown in FIG. 3) for closing the upward opening of the guide rail body 22 in a liquid-tight manner and an open position for opening the opening. When the upward opening of the guide rail body 22 is closed by the lid member 24, FIG.
As can be seen from the figure, a feeding passage P having a substantially circular cross section is formed inside. The inner diameter D of the feed passage P is slightly larger than the diameter d of the largest diameter bar W that can be fed in the feed passage P of the guide rail body 22 according to the first embodiment, and An oil layer is formed in the gap S between the two. The guide rail body 22 is composed of a U-shaped iron core 22b and a resin 22c, and the lid member 24 is composed of a resin, and the resin is preferably urethane resin.

When the feed arrow 12 is moved forward through the endless chain and the blade portion approaches the lid member 24, the feed arrow 12 passes through the blade portion of the feed arrow 12 protruding outside from the upward opening of the guide rail body 22. To do so, the lid member 24 is moved to the open position. The opening and closing of the lid member 24 is based on the position detection information of the feed arrow 12 by the encoder 14,
It is controlled by the controller 18. Further, as shown in FIG. 2, four oil injection ports 26 are provided between the bar lifting mechanism 10 and the bar lifting mechanism 10 along the guide rail body 22, one each. An adjustment valve 28 for adjusting the flow rate of oil is provided near each oil inlet 26. As can be seen from FIG.
Numeral 6 is provided on the side wall of the guide rail main body 22 at substantially the same height as the feed axis OO, and injects oil laterally to the bar W as indicated by arrows. Since the upward opening of the guide rail body 22 is closed in a liquid-tight manner by the lid member 24, the inner wall of the feed passage P and the rod W
Is filled with oil, and excess oil flows out of the open ends 8a, 8b at both ends of the guide rail main body 22 or the oil outlet through the feed passage P. That is, the guide rail 8 according to the present embodiment is a semi-closed system in which the upward opening of the guide rail main body 22 is liquid-tightly closed by the lid member 24, but both ends are open.

After the gap S between the inner wall of the feed passage P and the peripheral surface of the rod W is filled with oil, the amount of oil injected is substantially the same as the amount of oil flowing out from the open end of the guide rail body 22. Preferably, the amount is adjusted by adjusting valve 28. When the oil injection amount is larger than the outflow amount, the lateral force is given by the pressure of the oil flowing laterally to the side surface of the rod W, and the rod W is fed by overcoming the hydrodynamic centripetal force of the oil. The result is that the passage P is pressed toward the side wall opposite to the oil inlet 26. That is, the center axis of the bar W is eccentric in the lateral direction from the feed axis OO, and the bar W comes into contact with the inner wall in the feed passage P, and the rotation of the feed passage P It is hit against the inner wall, causing vibration and noise. In particular, this is likely to occur when the diameter of the bar W is large, because the area of the peripheral surface receiving the hydraulic pressure is large. When the diameter of the bar W is large, if the same amount of oil is injected as in the case of the thin bar W, the gap S between the inner wall of the feed passage P and the peripheral surface of the bar W is small. Therefore, it is necessary to adjust the oil injection amount also in relation to the size of the gap S.

In FIG. 1, the entirety of the guide rail 8 and a material shelf (not shown) are surrounded by an oil scattering prevention cover, and oil flowing out from both ends of the guide rail 8 during rotation of the bar W is formed. Prevents flying around. Note that the oil scattering prevention cover 30 is shown by a dotted line to show the guide rail 8 and the bar support mechanism 10. Below the guide rail 8, an oil receiving tray 3 extending in the longitudinal direction and having a size sufficient to receive the oil flowing out of the guide rail 8 is provided.
2 are provided. The oil accumulated in the oil receiving tray 32 is pumped up by an oil pump (not shown) and is supplied to the oil inlet 26 again. The configuration of the bar lifting mechanism 10 will be described in detail with reference to FIGS. 4 and 5. Each bar lifting mechanism 10 extends vertically through the bottom wall of the guide rail body 22. A seal member 36 is provided between the rod support member 34 and the guide rail main body 22 to prevent oil leakage. The upper end portion of the bar support member 34 can protrude and retract into the feed passage P, protrudes into the feed passage P, and supports the lower surface of the bar W in the feed passage P by its upper end surface 34a. Feeding axis OO whose center axis of W coincides with the processing axis of the bar processing machine
Projecting position (see FIG. 6) to be moved to the height Y-Y of
The upper end surface 34a is movable between a bottom wall of the guide rail main body 22 and a retreat position (see FIG. 5) which is substantially flush.
As shown in FIG. 5, the upper end surface 34a of the bar support member 34
Is constituted by an upwardly curved surface symmetrical with respect to the longitudinal axis XX of the bar support member 34, and more specifically, the guide rail main body 22 at the retracted position of the bar support member 34. Has a curved surface 34a having a shape that matches the curved inner wall surface of the substantially U-shaped feed passage P.

Each of the bar lifting mechanisms 10 has a link member 38 extending in the lateral direction and having an intermediate portion pivotally connected to the base 6 of the bar feeder 2 in a swingable manner. The link member 3
One end 38a of the rod 8 is connected to the lower end of the rod support member 34 via a pin 40 so as to move the rod support member 34 between the protruding position and the retracted position as the link member 38 swings. ing. Further, the bar lifting mechanism 10 includes a cylinder 42.
The cylinder 42 has a rod 48 which is advanced and retracted from a lower end of the housing 44 by a piston portion 46 provided in the housing 44. The tip of the rod 48 is connected to the other end 38 b of the link member 38 via a pin 50, and the link member 38 is swung by the rod 48 moving forward and backward. Above the housing 44 of the cylinder 42, a rod protrusion amount adjusting means 52 for adjusting the protrusion amount of the rod 48 is provided. The rod protrusion adjusting means 52 extends upward from the upper end of the piston portion 46 in the housing 44 to the outside of the housing 44 and moves up and down integrally with the piston. And a stopper portion 56 that moves as the piston moves up and down. When the piston moves downward, the stopper portion 56 also moves downward, and the lower end surface 56a of the stopper portion 56 comes into contact with the upper end surface 44a of the housing 44 as shown in FIGS. This prevents further downward movement of the piston and thus limits the protrusion of rod 48 by the piston. That is, by adjusting the screwing amount of the stopper portion 56 into the female screw portion 54, the maximum projecting amount of the rod 48 downward is determined, whereby the upper end of the bar support member 34 moved via the link member 38 is determined. The projecting amount of the portion into the feeding passage P is determined. On the side surface of the housing 44 of the cylinder 42, a scale plate 58 is provided which indicates the amount by which the stopper portion 56 is to be screwed in, corresponding to the diameter of the bar W to be processed. In order to prevent the stopper portion 56 from being loosened during the processing of the bar material, the stopper portion 56
And a stop is provided to prevent relative rotation between the female thread portion 54 and the stopper portion 56 with an end abutting on the female thread portion.

As shown in FIG. 5, when the bar W to be processed has the maximum diameter that can be fed by the guide rail body 22 according to the present embodiment, the center axis of the bar W is , Y-Y, and does not need to be supported by the bar supporting member 34 at the intermediate portion of the bar W. Therefore, the stopper portion 56 of the rod protrusion adjusting means 52 is screwed to the maximum, and the rod 48 does not protrude downward even when the bar feeder 2 is started. The upper end surface 34a is maintained at an initial position or a retracted position, which is a height position substantially flush with the bottom surface of the feeding passage P of the guide rail 8. FIG. 5 shows a state where the rod is rotated and the center axis of the rod is raised to a height Y-Y coinciding with the feed axis OO due to the fluid centripetal action of oil. On the other hand, as shown in FIG. 6, when the diameter of the bar W to be processed is relatively small, the middle portion of the bar W is easily bent. In such a case, detent 6
0, the stopper portions 56 of the four rod protrusion adjusting mechanisms are rotated in the loosening direction to the corresponding scales of the scale plate 58, and the stopper portions 56 are again fixed to the female screw portions 54 by the detents 60. I do. This allows the piston to move downward by the distance between the lower end surface 56a of the stopper portion 56 and the upper end surface 44a of the housing 44. The bar feeder 2 is started and the cylinder 42
Is activated, the rod 48 projects downward until the lower end surface 56a of the stopper portion 56 contacts the housing 44,
Accordingly, the bar support member 3 is connected via the link member 38.
4 moves upward. Thereby, as shown in FIG. 6, the bar W is moved by the upper end surface 34a of the bar support member 34 to a height YY at which the center axis of the bar W substantially coincides with the feed axis OO. Can be lifted. As a result, the bar W becomes almost straight.

The bar feeder 2 according to the present embodiment operates as follows. First, the operator loosens the detent 60 of the cylinder 42, adjusts the amount of screwing of the stopper portion 56 into the male thread portion according to the diameter of the bar W to be processed while checking the scale, and again stops the detent 60. As a result, the stopper portion 56 is locked to the male screw portion. In the initial position, the lid member 24 is in the open position, and the upward opening of the guide rail body 22 is open. The feed arrow 12 is located at a retracted position behind the guide rail 8. When the bar feeder 2 is started, a bar W to be processed is taken out from a material shelf (not shown) and is loaded from above the guide rail main body 22 through an opening. Next, a pusher (not shown) pushes the rear end of the bar W supplied into the feed path P of the guide rail 8 toward the NC automatic lathe. When the bar W advances to the NC automatic lathe N, the tip of the bar W is gripped by the clamp device. Next, the cover member 24 is moved to the closed position, and the upward opening of the guide rail body 22 is closed, and at the same time, the feed arrow 12 advances, and stops at the pause position where the finger chuck 12a is hidden below the cover member 24. . Then, the rear end of the bar W is inserted into the finger chuck 12 a provided at the tip of the feed arrow 12 by the retreat of the clamp device.
Next, the feed arrow 12 is moved forward by the motor via the endless chain until the bar W reaches the collet chuck of the NC automatic lathe N, and the tip of the bar W is subsequently gripped by the collet chuck. In this position,
The finger chuck 12 a of the feed arrow 12 and the entire bar are accommodated below the lid member 24.

Subsequently, the cylinder 18 of the bar lifting mechanism 10 is operated by the controller 18, and the piston moves downward until the lower end surface 56a of the stopper portion 56 comes into contact with the upper end surface 44a of the housing 44. Project downward. Thereby, the link member 38 swings,
The bar support member 34 connected thereto is pushed upward, and the central portion of the intermediate portion of the bar W is fed along the feed axis O-.
At the same time when the bar W is lifted to a position substantially coincident with O, the bar W is gripped by the rollers of the bar damper 20. When the bar W to be processed is the bar W having the maximum diameter that can be fed by the guide rail 8 according to the present embodiment (the case shown in FIG. 5), the stopper portion 56 The movement of the piston is blocked,
The bar support member 34 does not protrude into the feeding passage P, and the upper end surface 3
4a remains at a height YY position substantially flush with the bottom surface of the feed passage P.

Next, the controller 18 operates the oil pump to continuously supply oil from the oil inlet 26 into the feed passage P of the guide rail 8 during the processing of the rod material, so that the peripheral surface of the rod material W is The gap S between the feed passage P and the inner wall surface is always filled with oil. When the bar W rotates, the hydrodynamic centripetal force of the oil acts on the entire peripheral surface of the bar W, and the bar W floats, and its axis moves toward the feed axis OO of the guide rail 8. The rod W is moved and the contact between the bar W and the inner wall surface of the feeding passage P is prevented. When the feed arrow 12 moves forward in the guide rail 8, the encoder 14 transmits a pulse signal corresponding to the amount of movement of the endless chain, that is, the amount of movement of the blade portion of the feed arrow 12, to the controller 18. Controller 18
Counts the number of pulses transmitted from the encoder 14,
Based on this count value, the position of the wing portion of the feed arrow 12 is detected. As the processing of the bar W progresses, the bar is cut off one after another and shortened, and when the controller 18 determines that the blade portion of the feed arrow 12 approaches the lid member 24, the controller 18 removes the lid member 24. The blade is moved to the open position so that the blade portion of the feed arrow 12 can move forward. At the same time, the controller 18 stops the oil pump and stops the supply of oil to the oil inlet 26.

The controller 18 is connected to the encoder 14
, It is detected whether the finger chuck 12a of the feed arrow 12 has approached the bar support member 34 based on the position information of the feed arrow 12 according to the above. When the controller 18 determines that the finger chuck 12a of the feed arrow 12 has approached the bar support member 34 that is the most rearward in the feeding direction, the corresponding cylinder 42 is operated to retract the rod 48, and thereby the bar The support member 34 is moved to the retracted position to allow the finger chuck 12a to pass. Similarly, the remaining 3
The two bar supporting members 34 are sequentially moved to the retreat position from the bar supporting members 34 located rearward in the feeding direction, and allow the finger chuck 12a to pass.
When the bar W is processed one after another and becomes a length that cannot be processed, the remaining material is removed by the finger chuck 1.
2a, and is discharged through a residual material discharge port (not shown).

FIGS. 7 to 9 show a bar lifting mechanism of a bar feeder according to a second embodiment of the present invention. FIGS. 7 and 8 show FIGS. 4 and 5, respectively. FIG. 9 is a view corresponding to FIG. In the bar feeder 2 according to the second embodiment, except that the configuration of the rod protrusion amount adjusting mechanism 70 for adjusting the protrusion amount of the rod 48 of the cylinder 42 of the bar lifting mechanism 10 is different, The configuration is the same as that of the first embodiment. Therefore, only the configuration of the rod protrusion amount adjusting mechanism 70 will be described. As shown in FIGS. 7 to 9, the rod protrusion amount adjusting mechanism includes one rotating shaft 72 provided in parallel with the guide rail 8 below the cylinder 42 of the four bar lifting mechanisms 10 shown in FIG. 1. Have. A total of four cam members, one for each of the four link members 38, are provided on the rotary shaft 72 to contact the lower surface of the other end 38b of the link member 38 connected to the rod 48 of the cylinder 42. Have been. The cam contour surface 74a is configured so that the upper end surface 34a of the bar lifting member is substantially at the same retreat position as the bottom wall of the guide rail main body 22, and the center axis of the bar W having the minimum diameter is fed along the feeding axis O-. The link member 3 is moved so as to move between a protruding position that is lifted to a height Y-Y coinciding with O.
8 has a substantially egg-shaped profile that changes the amount of swinging or the amount of downward projection of the rod 48 of the cylinder 42. The four cams are mounted on the rotating shaft 72 so that the cam profiles coincide with each other at angular positions.
Is rotated, the four link members 38 are pushed up by the same amount by the corresponding cam profile surfaces 74a and are swung in synchronization. As a result, the upper ends of the four bar support members 34 also protrude and retract in the feed passage P in synchronization with each other.
Project by the same amount. Also, one worm wheel 76 is provided coaxially with the rotating shaft 72.
Adjacent thereto, a worm 78 meshing with the worm wheel 76 and a knob 80 for rotating the worm 78 provided coaxially with the worm 78 are provided.

The rod protrusion adjusting mechanism according to the second embodiment operates as follows. Before operating the bar feeder 2, the operator processes the knob so that the center axis of the bar W is lifted by the bar support member 34 to the height YY of the feed axis OO. The bar is rotated by a predetermined number of rotations corresponding to the diameter of the bar W to be formed. Thus, the four cams are rotated via the worm wheel 76, the worm, and the rotating shaft 72. When the cylinder 42 is operated, the rod 48 projects. When the lower surface of the link member 38 connected to the rod 48 abuts on the cam profile surface 74a, further protrusion of the rod 48 is prevented, and the amount of protrusion of the upper end of the bar support member 34 is determined thereby. You.
FIG. 10 is a perspective view of a guide rail main body which is a modified example of the guide rail shown in FIGS. 1 to 9, and a part of the guide rail main body is cut away to show an oil sump groove. Also,
FIG. 11 is a longitudinal sectional view of a guide rail body and a lid member, which are modifications of the guide rails shown in FIGS. 1 to 9.

The guide rail 8 of the first and second embodiments shown in FIGS. 1 to 9 may be constituted by a guide rail main body 100 and a lid member 102 shown in FIGS.
10 and 11, the guide rail body 10
More specifically, the guide rail body 100 has a gutter-like shape having a substantially U-shaped concave portion 104 formed in the longitudinal direction that forms the feeding passage P, and A curved concave portion 106 extending in the longitudinal direction is also formed on a surface of the lid member 102 facing the guide rail main body 100. Guide rail body 1
When the upper opening 108 of the ００00 is closed almost liquid-tight by the lid member 102, as can be seen from FIGS.
Inside, a feeding passage P having a substantially circular cross section, which is surrounded by a curved surface, is formed. The inside diameter D of the feeding passage P is slightly larger than the diameter d of the largest diameter rod material that can be fed, and a gap is formed between the two. Guide rail body 100 and lid member 102
Comprises a U-shaped iron core 110 and a resin 112, and the resin 112 is preferably a urethane resin. A feeding passage P is formed of a resin 112 on the iron core 110. When the guide rail body 100 is closed by the cover member 102, the guide rail body 100 and the inner wall surface of each of the lid member 102 that constitute the feeding path P are substantially annular and extend over the entire periphery. A band-shaped oil reservoir groove 114 is formed by molding the resin 112. The plurality of oil reservoir grooves 114 are provided at equal intervals in the longitudinal direction of the guide rail 8. The width L1 in the longitudinal direction of the oil sump groove 114 and the adjacent oil sump groove 1
The distance L2 between them is approximately equal to the distance L2, and is about 3 cm in this embodiment. Also, the oil sump groove 114
Is approximately 1 mm.

The guide rail 8 shown in FIGS. 10 and 11 operates as follows. The guide rail 8 shown in FIG. 10 and FIG.
Is closed almost liquid-tight by a lid member 102, but is open at both ends, and is a so-called semi-closed system in which supplied oil flows freely from both ends of the guide rails 8. Is stored in the oil sump groove 114.
Due to the rotation of the rod, the peripheral surface of the rod follows the oil accumulated in the oil sump groove 114, and the oil is guided by the substantially annular oil sump groove 114 to form a substantially annular oil layer around the rod. The hydrodynamic centripetal force of the oil acts on the peripheral surface of the rod, and the rod is moved toward the center of the feed passage P of the guide rail 8. Since the oil sump grooves 114 are arranged at equal intervals in the longitudinal direction of the guide rail 8, the guide rail 8
The contact with the inner wall surface is avoided.

According to the first and second embodiments, only the upward opening of the guide rail body 22 is closed by the lid member 24, and the so-called semi-closed system is opened at both ends. As compared with a so-called completely closed system in which no oil leaks from the so-called completely closed system 8, noise and vibration can be reduced with a relatively simple structure. Further, according to the first and second embodiments, the cylinder 42 having the rod
And the rod supporting member 3 is proportional to the amount of projection of the rod 48.
The rod 48 and the rod support member 34 are connected to each other so that the upper end of the rod 4 projects into the feed passage P of the guide rail 8, and furthermore, a rod protrusion amount adjusting means for adjusting the protrusion amount of the rod 48. 52, the center axis of the bar W is set to the feeding axis O- depending on the diameter of the bar W to be processed.
The lifting amount of the bar supporting member 34 can be adjusted so that the lifting can be performed up to the height Y-Y coinciding with O.

The upper end surface 34a of the bar supporting member 34
Is in a cross section perpendicular to the feed axis OO,
Since the both sides of the feed axis OO have the inclined surface or the curved surface 34a which is inclined upward and outward, the bar can be positioned directly below the feed axis OO, and the bar support member can be positioned. When the bar W is lifted upward by 34, the center axis of the bar W and the feeding axis OO can be aligned. Furthermore,
According to the first and second embodiments, the guide rail main body 22 is provided with the oil outlets 8a and 8b, and the oil injection amount adjusting valve 28 controls the oil injection amount from the oil outlet. The oil injection amount can be adjusted so as to be substantially the same as the outflow amount of the rod W. Therefore, when the lateral oil pressure is applied to the rod W, the rod W is eccentric. Can be avoided.

Further, according to the second embodiment, by rotating one knob, all the bar supporting members 3 can be rotated.
Since the amount of protrusion of 4 can be adjusted, the work by the operator is simplified. Further, in the guide rail 8 shown in FIGS. 10 and 11, a part of the oil is stored in the oil sump groove 114 without the oil entirely flowing out from the end of the guide rail 8, so that the oil layer is formed by the rotation of the rod. It is formed between the material and the inner wall surface of the guide rail 8, so that the rod material and the inner wall surface of the guide rail 8 are prevented from contacting each other, so that a vibration-proof and sound-proof effect can be obtained. The present invention is not limited to the above embodiments, and various changes can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, there is.

In the first and second embodiments, 1
The cover member 24 is divided into several along the feed axis OO, and when the blade portion of the feed arrow 12 approaches, the lid member 24 close to the blade portion, that is, You may make it move to an open position one by one from the back lid part with respect to a feeding direction. In the first and second embodiments, the bar support member 34 raises the central axis of the bar W to a height YY that coincides with the feed axis OO. . However, the bar support member 34 raises the center axis of the bar W to a height YY slightly lower than the feed axis OO, and rotates the bar W in a more straight state. The rotation of W causes an oil layer to be formed between the upper end surface 34a of the bar support member 34 and the bar W, and the bar W is floated by the hydrodynamic centripetal action of the oil, and the central axis of the bar W The feed axis OO
May be substantially matched.

Further, in the first and second embodiments, the upper end surface 34a is substantially flush with the bottom surface of the feed passage P at the retracted position of the bar support member 34. In the retracted position, the position of the upper end surface 34a is not required to obstruct the bar W to be fed, and may be lower than the bottom of the feeding path P. Furthermore, in the first and second embodiments, the rod 48 of the cylinder 42 and the bar support member 34 are connected via the link member 38, but the upper end of the bar support member 34 projects. The rod 48 and the bar support member 34 may be directly connected as long as the rod 48 can move between the position and the retracted position. Further, FIG.
And the guide rail 8 shown in FIG.
2 is that the upper opening 108 of the guide rail main body 100 is desirably closed in a liquid-tight manner.
The 0 upper opening 108 need not necessarily be completely closed. For example, a gap may be formed between the upper opening 108 of the guide rail main body 100 and the lid member 102. In this case, the peripheral wall of the bar is
The oil accumulated in the oil sump groove 114 of the 00 is rotated in the circumferential direction along the inner wall of the guide rail 8 with the rotation of the rod,
An oil layer is formed between the lower surface of the bar and the inner wall surface of the guide rail main body 100, and contact between the lower surface of the rod and the inner wall surface of the guide rail main body 100 that is bent by its own weight is avoided. Reduce vibration and noise of bars.

Further, in the guide rail 8 shown in FIGS. 10 and 11, the depth and width of the oil sump groove 114 and the distance between the adjacent oil sump grooves 114 are determined by the degree of vibration and noise, and The amount may be appropriately determined as needed based on the amount of oil leaking from the end of the guide rail 8 and the amount of oil to be left in the oil reservoir groove 114.

[0030]

According to the present invention, the bar feeder having a simple structure can more effectively prevent the vibration and noise of the bar and can process the bar more precisely. Can be provided.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing an entire bar feeder according to the present embodiment.

FIG. 2 is an overall plan view of the bar feeder according to the present embodiment.

FIG. 3 is a sectional view taken along the line III-III shown in FIG. 2;

FIG. 4 shows a bar lifting mechanism according to the first embodiment of the present invention.

5 is a cross-sectional view taken along the line VV shown in FIG. 4, showing a state where a bar having a maximum diameter is being fed.

6 is a sectional view taken along the line VV shown in FIG. 4 and shows a state in which a small-diameter bar is being fed.

7 shows a bar lifting mechanism of a bar feeder according to a second embodiment of the present invention, and is a view corresponding to FIG.

FIG. 8 shows a bar lifting mechanism of a bar feeder according to a second embodiment of the present invention, and is a view corresponding to FIG.

FIG. 9 shows a bar lifting mechanism of a bar feeder according to a second embodiment of the present invention, and is a view corresponding to FIG.

FIG. 10 is a perspective view of a guide rail main body which is a modified example of the guide rail shown in FIGS. 1 to 9, wherein a part of the guide rail main body is cut away to show an oil reservoir groove.

FIG. 11 is a longitudinal sectional view of a guide rail main body and a lid member which are modified examples of the guide rails shown in FIGS. 1 to 9;

[Explanation of symbols]

 2 Bar Material Processing Device 22 Guide Rail Main Body 24 Lid Member 26 Oil Outlet 28 Oil Injection Amount Adjusting Means 34 Bar Material Supporting Member 34a Curved Surface (Sloped Surface) 42 Cylinder 48 Rod 52 Rod Projection Amount Adjusting Means 100 Guide Rail Main Body 102 Lid Member P Feed passage W Bar O-O Feed axis

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23B 13/02 B23B 13/08

Claims (6)

(57) [Claims] 1. A bar material supplied from an upper region into a feed passage of a horizontally extending guide rail main body is processed by a feed arrow along a feed axis coinciding with a processing axis of a bar material processing apparatus. A bar feeder that feeds the apparatus, comprising: an openable / closable lid member that covers an upward opening of the guide rail main body; and an oil supply unit that supplies oil into the guide rail main body. A bar supporting member extending vertically in a direction penetrating the bottom wall of the guide rail main body, and having an upper end portion capable of protruding and retracting into the feeding passage; When protruding into the passage, a lower end of the bar in the feeding passage is supported, and a center axis of the bar is moved toward the feeding axis. 2. The opening of the guide rail main body is closed in a liquid-tight manner by the lid member, and the gap between the inner wall of the feed passage and the peripheral surface of the rod is filled with oil by the oil supply means. 2. The bar feeder according to claim 1, wherein the filled and excess oil flows out of oil outlets at both ends of the guide rail body through the feed passage. 3. 3. The amount of protrusion of the bar support member into the feed passage is an amount that allows the center axis of the bar to be raised to a height that coincides with the feed axis.
The bar feeder according to claim 1, wherein the bar is continuously supported by an upper end surface of the upper end portion of the bar support member. And a cylinder having a rod that can advance and retreat, wherein an upper end portion of the rod supporting member projects into the feed passage of the guide rail in proportion to a projection amount of the rod. The rod according to any one of claims 1 to 3, wherein the rod and the rod supporting member are connected to each other, and further comprising a rod protrusion amount adjusting means for adjusting a protrusion amount of the rod. The bar feeder as described. 5. An upper end surface of the bar supporting member has an inclined surface which is inclined outward and upward on both sides in a direction perpendicular to the feed axis in a cross section perpendicular to the feed axis. The bar feeder according to any one of claims 1 to 4, comprising: 6. An oil outlet is provided in the guide rail main body, and the oil supply means is arranged such that an inflow of oil is equal to an outflow of oil from the oil outlet. Having oil inflow control means for adjusting the inflow of oil,
The bar feeder according to any one of claims 1 to 5, characterized in that: