JP3435381B2 - Automatic 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 an automatic bar material feeder for supplying a bar material to a bar processing machine such as an NC automatic lathe.

2. Description of the Related Art Conventionally, a guide rail extending toward a bar processing machine is replenished with bar materials one by one from a material rack provided in parallel with the guide rail, and the bar material is guided by a feed member. There is known an automatic bar feeder that feeds along. In the cross section, the material rack of the conventional automatic bar feeder is generally one that is inclined downward toward the downstream side with respect to the flow direction of the bar that flows toward the guide rail on the shelf surface. Target. In such a material shelf, a stopper projecting upward from the shelf surface for holding the bar material on the shelf surface is provided at the downstream edge, and the bar material lifting mechanism provides the most downstream side. The bar was lifted above the stopper to replenish the bar into the guide rail.

[0002]

However, in the conventional material rack, as described above, the bar lifting mechanism is indispensable, and the structure must be complicated. In addition, if the bar to be processed is, for example, a spline formed on the peripheral wall or is a so-called deformed bar (bar with a hexagonal or triangular cross section), the While moving, the splines will mesh with each other between adjacent rods, and in the case of a rod having a triangular cross section, the following rod will ride on the preceding rod and become entangled with each other. In this state,
Even if an attempt is made to lift a bar upward by the bar lifting mechanism, adjacent bars are entangled with each other and the bar cannot be smoothly supplied. Further, it is desired to alleviate the problem of noise when the bar is put into the guide rail. Further, it is desirable to reduce the labor of the worker when replenishing the material rack with the bar material. Therefore, an object of the present invention is to have a simple structure, to smoothly replenish the bar to the guide rail, to alleviate the problem of noise during replenishment of the bar, and to reduce the labor of the operator. An object of the present invention is to provide an automatic bar feeder having a material shelf that can be used.

[0003]

SUMMARY OF THE INVENTION The above object of the present invention is to replenish bar stock into a guide rail extending toward a bar processing machine one by one from a material rack provided in parallel with the guide rail. An automatic bar feeder that feeds a bar along a guide rail by a feed member, wherein the shelf surface of the material shelf flows in the cross section toward the guide rail on the shelf surface. The rod is inclined upward toward the downstream side with respect to the flow direction of the bar, and further has a pushing member for pushing the bar parallel to the guide rail along the shelf surface, The pushing member extends parallel to the guide rail and is movable in translation along the shelf surface between an upstream position near the upstream edge of the material shelf and a downstream position near the downstream edge. Mounted on the shelf surface in a row by the pushing member. By pressing a plurality of bars from the upstream side, it is possible to most downstream side of the bar are extruded from said shelf surface is supplemented in the guide rail, it is achieved by an automatic bar feeder according to claim. In the automatic bar feeder according to the present invention, by pushing the bar placed on the shelf surface by the pushing member from the upstream side with respect to the flow direction of the bar, the most downstream bar from the shelf surface. Push it out and feed it into the guide rail. In the present invention, a bar material lifting mechanism having a complicated mechanism, which is required in a conventional material shelf, is not required, and a pushing member for pressing the bar material from the downstream side may be provided, so that the structure is greatly simplified. can do. Further, according to the present invention, even when a bar material having a spline formed on the peripheral surface or a bar material having a triangular or hexagonal cross section, which is called a "deformed member", is used, It can be supplied smoothly one after another. That is, while the bar is moving on the shelf surface, the splines of the bar adjacent to each other may be meshed with each other, and in the profile with a triangular or hexagonal cross section, the bar on the upstream side is the one on the downstream side. Even if it gets on the bar, the entanglement of the bar is easy to unwind in the pushing direction. The inventor of the present invention paid attention to this point, and configured to extrude the rods in the flow direction of the rods so that the rods can be smoothly replenished one by one. Moreover, unlike conventional material shelves, the bar is not lifted by the bar lifting mechanism and then dropped onto the guide rails, but is dropped directly onto the guide rails from the downstream edge of the material shelf. The height can be minimized and the problem of noise when the bar hits the guide rail is mitigated. Further, since the upstream side of the material shelf can be made lower than the downstream side, when the worker replenishes the material shelf with the material from the upstream side, it is not necessary to lift the heavy bar material to a high position, which reduces the work effort. Can be achieved.

[0004]

DETAILED DESCRIPTION OF THE INVENTION Referring to the accompanying drawings,
Various embodiments of the automatic bar feeder according to the present invention will be described. FIG. 1 is a plan view of an automatic bar feeder according to the present embodiment, and FIG. 2 is II- shown in FIG.
FIG. 2 is a sectional view taken along line II. The automatic bar material feeder 2 is installed adjacent to a bar material processing device (not shown). As shown in FIGS. 1 and 2, the automatic bar feeder 2 includes a base having a rectangular cross section, a hollow guide rail, a guide rail supported by the base and extending straight toward the bar processing device, and a guide rail. 6, a material shelf 8 for holding a plurality of bars (new materials) provided in parallel with each other, and a bar extrusion for replenishing the bars from the material shelf 8 one by one to the guide rails 6. Mechanism 10,
The guide rail moving means 12 for reciprocating the rear guide rail portion 22 in the lateral direction, and the primary feeding member 14.
A secondary feed member or feed arrow 16 and a primary feed member 14
And a feed member drive mechanism 1 for moving the secondary feed member
8 and. The guide rail 6 has a front guide rail portion 20 arranged on the bar processing device side (front side) and a rear guide rail portion 22 extending rearward thereof. As shown in FIG. 2, the rear guide rail portion 22 includes a primary feed guide rail portion 24 for performing the primary feed of the bar material by the primary feed member 14 and a secondary feed member or a feed arrow 16 for secondary feed. And a guide rail portion 26 for secondary feeding for feeding. The primary feed guide rail portion 24 and the secondary feed guide rail portion 26 are provided in parallel with each other, and the guide rail moving means 12 described later causes the primary feed guide rail portion 24 to move forward. And a secondary feed position where the secondary feed guide rail portion 26 is coaxial with the front guide rail portion 20 reciprocates integrally in the lateral direction.

Next, the structure of the material rack 8 will be described in more detail. As shown in FIG. 1, the material shelf 8 is composed of four shelf members 28 that extend vertically to the guide rail 6 in the lateral direction. The respective shelf members 28 are formed in the same shape, and as shown in FIG.
Is configured. The material shelf 8 has an edge 32 (edge on the guide rail side) on the downstream side with respect to the flow direction of the bar material (left direction in FIG. 2) on the material shelf 8, and with respect to the material flow direction. And an edge 34 on the upstream side. The shelf surface 30 is shown in FIG.
As shown in, the cross section is inclined upward toward the downstream side with respect to the flow direction of the bar material. Further, the downstream side edge portion 32 of the material shelf 8 is a flat bar material which is continuously provided on the shelf surface 30 and is inclined in a direction opposite to the shelf surface 30 (inclined downward with respect to the flow direction of the bar material). A surface 36 is formed. The downstream side edge portion 32 is provided adjacent to the side and the upper side of the guide rail 6 so that the dropping distance of the bar is minimized.

As can be seen from FIG. 2, in the boundary area between the shelf surface 30 and the bar guide surface 36, the shelf surface 30 and the bar guide surface 36 which are inclined in opposite directions are formed so as to intersect with each other. Corners 38 are formed. As shown in FIG. 2, the bars are placed in a line on the shelf surface 30 of the material shelf 8. These rods are pushed into the guide rails 6 by pushing the rods from the upstream side one by one by pushing the rods from the upstream side by the rod pushing mechanism 10 to push the rods one by one from the material rack 8. The rod pushing-out mechanism 10 has a detection unit 40 provided along the vicinity of the downstream side edge portion 32 of the material rack 8 for detecting the presence of the rod. The detection means 40 is directed to the corner area of the material shelf 8 and detects whether or not a bar is present in the corner area. A signal regarding the presence or absence of a rod detected by the detection means 40 is sent to a controller (not shown), and the controller controls a pushing member drive motor 42 of the rod pushing mechanism 10 to be described later. When one bar is pushed out of the material rack 8 by 44, the pushing member motor is stopped.

3 and 4 are partial views showing the details of the rod extruding mechanism. The rod pushing-out mechanism 10 extends parallel to the guide rails 6 and extends along the shelf surface 30 between an upstream position near the upstream edge 34 and a downstream position near the downstream edge 32. The pushing member 44 provided for translational movement, the pushing member driving means 56 for reciprocating the pushing member 44, and the pushing member 44 for moving the bar parallel to the guide rail 6 on the shelf surface 30. Guide rail 6
And a guide member or a linear guide 46 for moving in parallel with. The linear guide 46 is a rail member 4 that extends straight in the vertical direction with respect to the guide rail 6.
8 and a bearing block 50 having a ball bearing that engages the side surface of the rail member 48. The bearing block 50 is attached to the lower surface of the pushing member 44. The linear guides 46 are provided at both ends of the pushing member 44 (front side and rear side with respect to the feeding direction of the rod within the guide rail).

The pushing member driving means 56 further has a screw shaft 52 extending transversely to the guide rail 6 and a nut 54 engaging with the screw shaft 52 via a steel ball.
Two ball screw transmissions 56, a push member drive shaft 58 extending between the two ball screw transmissions 56 along the upstream edge 34 of the material rack 8, and a push member drive shafts 58 and 2.
Gear means or a cylindrical worm gear and a cylindrical worm wheel gear 62 provided between the two screw shafts 52 for transmitting the rotation of the pushing member drive shaft 58 to the screw shaft 52.
And a push member drive motor 42 for rotating the push member drive shaft 58, and a rotation transmission means 64 for transmitting the rotation of the push member drive motor 42 to the push member drive shaft 58. The rotation transmission means 64 has a sprocket 66 for a pushing member and an endless member or an endless chain 68 for a pushing member. As shown in FIG. 1, two screw shafts 52 of the ball screw transmission device 56 are arranged at intervals in the longitudinal direction of the pressing member 44. Each ball screw transmission device 56 is provided below the pushing member 44, and the nut 54 is attached to the lower surface of the pushing member 44. again,
Referring to FIG. 2, a rod shaft 70 that extends perpendicularly to the shelf member 28 and extends straight upward is provided at the upstream end of each shelf member 28.
Is provided. Further, a regulating member 7 having a lower surface above the shelf member 28 and extending parallel to the shelf surface 30 of the shelf member 28.
Two are provided. A through hole 74 for receiving the rod shaft 70 is formed at the upstream end of the regulating member 72, and the regulating member 72 is provided so as to be rotatable around the rod shaft 70 and slidable in the longitudinal direction. The pushing member 44 includes the regulating member 7
A slit 86 (not shown) is formed at a portion intersecting with 2.

5 and 6 are sectional views taken along the line V-V shown in FIG. 1. FIG. 5 shows the case where the rear guide rail portion is at the primary feeding position, and FIG. , Shows the case where the rear guide rail part is in the secondary feed position. FIG. 7 is a plan view of the rear guide rail portion shown in FIG. The details of the rear guide rail portion 22 will be described with reference to FIGS. 5 and 6. As described above, the rear guide rail portion 22 includes the primary feed guide rail portion 24 and the secondary feed guide rail portion 26. The rear guide rail portion 22 is formed by the guide rail moving means 12.
Thereby laterally between the primary feed position where the primary feed guide rail portion 24 is aligned with the front guide rail portion 20 and the secondary feed position where the secondary feed guide rail portion 26 is aligned with the front guide rail portion 20. Reciprocate to.
The guide rail moving means 12 is provided so as to be slidable with respect to the base plate 78 fixed to the upper surface of the base 4, and the rear guide rail portion 2 on the upper surface.
It has a slide plate 80 for supporting 2 and a guide rail moving cylinder 82 for laterally moving the slide plate 80. The rod of the guide rail moving cylinder 82 is attached to the sliding plate 80, whereby the sliding plate 80 reciprocates in the lateral direction, and the rear guide rail portion 22 moves between the temporary feeding position and the secondary feeding position. It is designed to reciprocate between.

As can be seen from FIGS. 5 and 6, the bottom wall of the primary feed guide rail portion 24 is provided with a slit 86 extending in the entire longitudinal direction as will be described later. Further, as shown in FIG.
Is a generally rectangular parallelepiped body portion 88 that moves in the primary feed guide rail portion 24, a slit passage portion 90 that extends straight downward from the lower surface of the body portion 88 and is received in a slit 86, and a slit. Passing part 90
Has a rectangular parallelepiped rising prevention portion 92 that extends straight in the traveling direction, and the cross section of the primary feeding member 14 is substantially I-shaped as a whole. The bottom walls on both sides of the slit 86 of the primary feed guide rail portion 24 are received in the regions on both sides of the substantially I-shaped slit passage portion 90. The floating prevention portion 92 of the primary feed member 14 is attached to the primary feed endless chain 112 by one pin 94, whereby the primary feed endless chain 112 is attached.
Does not hinder traveling around the primary feed sprocket 110. The upper surface of the lifting prevention portion 92 is flat so as to slide along the bottom surface of the primary feed guide rail portion 24. Lifting prevention part 92
The upper surface resists the bottom surface of the primary feed guide rail portion 24, so that when the primary feed member 14 pushes the rod material in the primary feed guide rail portion 24, the resistance of the rod material pushes it back. Thus, it is prevented from floating upward from the primary feed guide rail portion 24. The cross-sectional inner shape of the primary feed guide rail portion 24 is an angular U-shape complementary to the main body portion 88 of the primary feed member 14, and the cross-sectional inner shape of the secondary feed guide rail portion 26. Is a curved U-shape having a curved surface coaxial with the axis of the bar processing machine. As shown in FIGS. 5 and 6,
The entire feed arrow 16 is received in the secondary feed guide rail portion 26, and the vane portion 100 provided behind and above the secondary feed guide rail portion 26 extends laterally outside the secondary feed guide rail portion 26. There is.

FIG. 8 is a side view showing the feed member drive mechanism. 9 is a detailed view of the rear end portion of the feed member drive mechanism shown in FIG. 8, and FIG. 10 is a plan view of the feed member drive mechanism shown in FIG. The primary feed member 14 and the feed arrow 16 are driven by a feed member drive mechanism 18. The feed member drive mechanism 18 includes one feed member drive motor 42, a primary feed transmission device or a primary feed chain transmission device 102 for transmitting power from the motor to the primary feed member 14, and a power output from the motor. Send arrow 16
For transmitting to the secondary feed transmission or the secondary feed chain transmission 104, and for transmitting the power from the feed member driving motor to the primary feed chain transmission 102 or the secondary feed chain transmission 104. Motor power transmission means 106, and gear switching means 108 for selectively connecting the power of the feed member driving motor to the primary feed chain transmission device 102 and the secondary feed chain transmission device 104.

The primary feed chain transmission 102 includes a pair of rotating bodies or primary feed sprockets 110, which are provided below the primary feed guide rail portion 24 and one in front of and one in the rear of the longitudinal direction. It has an endless member or an endless chain 112 for primary feed wound around the feed sprocket 110. The upper portion of the primary feed endless chain 112 is longitudinally arranged directly below the primary feed guide rail portion 24, and the lower portion is arranged in the hollow portion of the base. As can be seen from FIG. 8, the primary feed endless chain 112 is provided with two primary feed members 14 at equal intervals, that is, at positions facing each other. It is driven by the feed member driving motor 42 to travel in one direction. Primary feed guide rail part 24
A slit 86, which is slightly wider than the thickness of the slit passing portion 90, is formed over the entire length of the bottom wall, so that the slit passing portion 90 can pass when the primary feeding member 14 moves inside. The primary feed member 14 moves from the rear end portion to the front end portion of the primary feed guide rail portion 24, and then moves out of the primary feed guide rail portion 24 from the front end portion as the primary feed endless chain 112 moves. It is soaked downwards, passes through the base, is received inward from the rear end side of the primary feed guide rail portion 24, and is circulated.

As shown in FIG. 9, a slit passing portion 90 and a lift preventing portion 92 of the primary feeding member 14 are received behind the primary feeding guide rail portion 24, and the slit passing portion 90 is guided to the primary feeding guide. A primary feed member guide 116 is provided for guiding into the slit 86 of the rail portion 24. As shown in FIGS. 5 and 6, the primary feeding member guide portion 116 has a cross-section having a shape complementary to that of the slit passage portion 90 and the rising prevention portion 92, and the rear end portion thereof is preferably easy to move. It is preferably flared rearward for reception.

The secondary feed chain transmission device 104 comprises a pair of rotating bodies or secondary feed sprockets, one on the side of the secondary feed guide rail portion 26 and one on the front and the rear of the longitudinal direction. 118, and an endless member or a secondary feed endless chain 120 wound around the secondary feed sprocket 118. 5 and 6
As shown in, the blade portion 100 of the feeding arrow 16 is attached to the secondary feeding endless chain 120. The motor power transmission means 106 includes a pair of motor rotating bodies or motor sprockets 122 driven by the feed member driving motor 42, and a motor endless member or motor endless chain 124 wound around the motor sprockets 122. Have.

FIG. 10 is a plan view showing a gear switching means for switching the transmission of power by the feed member driving motor between the primary feed member and the secondary feed member. As shown in FIG. 10, of the pair of primary feed sprockets 110, the rear primary feed sprockets 110 are the primary feed rotary shafts 12.
6, a primary-feed driven gear 128 is provided on the secondary-feed side of the primary-feed rotary shaft 126.
Of the pair of secondary feed sprockets 118, the rear secondary feed sprocket 118 is provided on the secondary feed rotary shaft 132, and the secondary feed rotary shaft 132 has a secondary feed sprocket 118 on the primary feed side. A driven gear 132 for the next feed is provided. Further, one of the pair of motor sprockets 122 is provided on the motor rotary shaft 134, and the motor rotary shaft 134 is provided with a drive gear 136 slidably provided in the longitudinal direction. A rod 140 of a drive gear moving cylinder 138 is attached to the drive gear 136 via a bracket 142.
The driving gear moving cylinder 138 reciprocates so as to selectively mesh with the primary feed driven gear 128 and the secondary feed driven gear 132.

Next, the operation of the automatic bar feeder 2 according to this embodiment will be described. Initially, the pushing member 44 is
As shown in FIG. 2, the material rack 8 is at the upstream position, and the rear guide rail portion 22 is at the primary feed position shown in FIG. Further, one of the primary feed members 14 is received in the rear end of the primary feed guide rail portion 24, and the other primary feed member 14 is outside the front end of the primary feed guide rail portion 24. Down and down. Further, the gear changing means 108 is connected to the primary feed chain transmission 102 side as shown in FIG.

FIG. 11 is an explanatory view showing the detection of the presence / absence of a bar by the detection means provided on the material shelf, and FIG. 12 is a view showing the operation of the primary and secondary feed of the bar. is there. First, the operator lifts each bar material restricting member 72 and rotates it around the bar shaft 70 to the outside of the shelf surface 30 area of the material shelf 8 so as not to interfere with placing a new material on the material shelf 8. Let Next, the worker places the bar material W (new material) on the material shelf 8 and arranges the bar material in a line on the material shelf 8. Then, the regulating member 72 is returned to the original position. Then, when the automatic bar feeder 2 is activated, the controller causes
The pushing member driving motor 42 is actuated to rotate the pushing member sprocket 66 and the pushing member endless chain 68.
Is transmitted to the pushing member drive shaft 58 via the. The rotation of the pushing member drive shaft 58 is transmitted to the screw shaft 52 via the cylindrical worm gear and the cylindrical worm wheel gear 62. As a result, the nut 54 attached to the lower surface of the pushing member 44 advances. 2 in the longitudinal direction of the pushing member 44
Guided by the ball screw transmission 56 also provided symmetrically and the linear guides 46 provided at both ends, the pushing member 44 moves parallel to the guide rail 6, and the rod on the material shelf 8 is moved. Push the material from the upstream side, and the bar material is the guide rail 6
Move parallel to.

FIGS. 11A to 11D show a state in which the bar member is being pushed by the pushing member 44. When the bar member is pushed by the pushing member 44, the bar member on the most downstream side is the shelf surface 30.
(FIGS. 11A and 11B), during which the detection means 40 detects that the bar is present in the corner area of the material shelf 8. The motor for the pushing member continues to operate by the controller while the detection signal for detecting the presence of the bar is sent. Further, when pushed and the bar exceeds the corner 38 (FIG. 11C), the bar guide surface 36
It rapidly rolls along and falls toward the guide rail 6. As a result, a space is formed in the corner area with the subsequent bar in a short time (FIG. 11D). As soon as the detecting means 40 detects this space, that is, detects that there is no bar in the corner area,
The pushing member driving motor 42 is stopped by the controller, and the replenishing operation of the bar is stopped.

The operation of the primary feeding and the secondary feeding will be described with reference to FIGS.
As shown in (a), the bar material extruded from the material shelf 8 is supplied to the front of the primary feed member 14 in the primary feed guide rail portion 24. At this time, as can be seen from FIG. 12A, the tip portion of the bar is put into the front guide rail portion 20. The feed member driving motor 42 is operated, the primary feed member 14 is moved forward by the gear changeover means 108 and the primary feed chain transmission device 102, and the rod is fed to the clamp position (FIG. 12).
(B)). Since the tip of the bar is received in the front guide rail portion 20, the front end is guided by the front guide rail portion 20 coaxially with the axis of the bar processing machine during the primary feeding.

Subsequently, at the clamp position, the tip of the bar is clamped by a clamp device (not shown) of the bar processing machine. At this time, the primary feed member 14 is located in the front end portion of the primary feed guide rail portion 24. The other primary feed member 14 ′ stands by at a position below the rear end of the primary feed guide rail portion 24. In this state, the slide plate 80 is moved by the guide rail moving cylinder 82 to move the rear guide rail portion 22.
Is moved from the primary feed position shown in FIG. 5 to the secondary feed position shown in FIG. Further, the power of the feed member driving motor is switched to the secondary feed chain transmission device 104 by the gear switching means 108. As a result, the feed arrow 16 is moved forward, and the finger chuck provided at the tip of the feed arrow 16 is inserted into the rear end portion of the bar. Subsequently, the clamp device is released, the bar is fed forward by the feed arrow 16, and the bar is processed (FIG. 12).
(D)). After finishing the bar processing, the motor 4 for driving the feeding member
2 reverses and the feed arrow 16 moves backward (Fig. 12
(E)).

Subsequently, the guide rail moving cylinder 8
2 operates to move the sliding plate 80, and the rear guide rail portion 22 returns from the secondary feeding position to the primary feeding position (FIG. 12 (f)). Further, the gear switching means 108 switches from the secondary feed chain transmission device 104 to the primary feed chain transmission device 102, and the forward movement of the feed member driving motor 42 causes the primary feed member 14 to move forward. As a result, the primary feeding member 14 moves out of the rear guide rail portion 22 and further moves downward. Meanwhile, the other primary feed member 14 ′ is guided by the primary feed member guide portion 116 to receive the slit passage portion 90 in the slit 86 and the main body portion 88 in the primary feed guide rail portion 24. (Fig. 12
(G)). At the rear end portion of the front guide rail portion 20, a residual material processing hole (not shown) for discarding the residual material after the processing is completed is formed so as to open toward the rear guide rail portion 22. Therefore, the primary feed member 14 passes through the inside thereof and is sunk below the primary feed guide rail portion 24. The above steps are repeated until the number of bars remaining on the material shelf 8 becomes one. When there is only one bar, the red lamp provided on the automatic bar feeder 2 lights up to inform the operator that more bar should be replenished.

According to this embodiment, two primary feed members 14 are attached to the primary feed endless chain 112 at equal intervals, and the primary feed member 14 is circulated. When the primary feed is completed by the member 14, the other primary feed member 14 ′ is waiting at a position near the primary feed position behind the primary feed guide rail portion 24, and the operation and time for returning the primary feed member 14 It is unnecessary. In addition, such a configuration, in particular,
This is advantageous when the single motor 42 is configured to perform the primary feeding and the secondary feeding as in the present embodiment. That is, after the primary end, the motor 42 is switched to the secondary feed side, during which the primary feed member 14 cannot be returned to prepare for the primary feed. However, according to the above configuration, when the primary feeding is completed, the other primary feeding member 1
Since 4'is waiting for the next primary feed, the operation and time for returning the primary feed member 14 is not required when switching to the primary feed, and the primary feed can be immediately started. The material feeding time can be shortened.

Further, according to the present embodiment, since the primary feed member 14 is provided with the floating prevention portion 92, the primary feed member 14 is pushed back by the resistance when pushing the bar material, and the primary feed guide rails. It is possible to prevent the material from floating upward from the portion 24, and it is possible to accurately carry out the primary feeding of the bar material. Further, according to the present embodiment, the primary feed member guide portion 116 is provided behind the primary feed guide rail portion 24.
Is provided, the circulation movement of the primary feeding member 14 is smoothly performed. Further, according to the present embodiment, since the power supply switching means 108 for switching between the primary transmission chain transmission device 102 and the secondary transmission chain transmission device 104 is provided, one motor 42 is used to perform the primary and secondary feeds. This can be done, and the cost can be reduced. Further, according to the present embodiment, the primary feed chain transmission device 102 is provided below the primary feed guide rail portion 24, and the primary feed endless chain 112 is configured to run in the base. Therefore, it is possible to slim down the entire automatic bar feeder.

Further, according to this embodiment, since the slit passing portion 90 has a small width in the lateral direction, the slit 8
It is possible to provide an automatic bar feeder which can make 6 thin and can be used for a thin bar. Furthermore,
In the conventional material shelf, since it is inclined downward toward the guide rail 6 (inclined downward with respect to the flow direction of the bar material), it is located above the shelf surface 30 at the downstream edge 32 of the material shelf 8. It is necessary to provide a stopper for preventing the bar material from projecting to the top, and in order to take out the bar materials one by one beyond the stopper, lift the bar material on the most downstream side to a position higher than the stopper and exceed the stopper. A bar lifting mechanism for dropping the bar into the guide rail 6 was essential. In this embodiment, since the shelf surface 30 is inclined upward with respect to the flow direction of the bar material, it is necessary to provide a means for preventing the bar material from falling and a bar material lifting mechanism at the downstream edge 32. Without
It is possible to use a mechanism in which the rod is simply pushed from the downstream side, and the structure can be greatly simplified.

Further, in the material shelf 8 of the present embodiment, the bar is pushed in the flow direction from the downstream side, and the bar at the most downstream side is pushed out. Even if a spline is formed on the peripheral wall or if it is a so-called deformed material (bar material having a hexagonal or triangular cross section), the material of the bar material is not entangled with adjacent bar materials. You can replenish the guide rails one by one from the shelf. That is, in the conventional material shelf, as described above, the shelf surface is inclined downward with respect to the flow direction of the bar material, and the bar material at the most downstream side is lifted by the bar material lifting mechanism, and one by one. It is designed to be taken out. When a bar moves on a shelf surface, splines mesh between adjacent bars, and in the case of a bar with a triangular cross-section, subsequent bars run over and entangle with the preceding bar. I will end up. In the conventional material rack, since the mechanism is such that the bar is lifted and taken out, the bar cannot be smoothly lifted one by one due to the entanglement with the adjacent bar, but according to the present embodiment, Since the rods are extruded in the direction that the entanglement can be released, they can be extruded one by one without entanglement.

Further, in the material shelf 8 in this embodiment, as described above, it is not necessary to provide the material shelf 8 with the stopper portion projecting upward from the shelf surface 30, and the bar material is the shelf surface 3
It falls into the guide rail 6 from a height of 0. Therefore,
Since the drop height can be minimized, the noise when the bar falls into the guide rail 6 is reduced. Further, in the material shelf 8 according to the present embodiment, the upstream side edge portion 34 can be made lower than the downstream side edge portion 32, so that the operator can easily perform the lifting work when replenishing the material shelf 8 with the bar material. There is.

Further, in the present embodiment, a bar material guide surface 36 that is inclined in the opposite direction to the shelf surface 30 is provided, and the detecting means 40 is directed to the corner portion 38 where these surfaces intersect. Therefore, when the bar exceeds the corner portion 38, it rapidly descends along the bar guide surface 36, and a space is formed between the bar and the following bar in a short time. Since the movement of the pushing member 44 is stopped, it is possible to provide the material rack 8 with no mistake in replenishing the bar material.

The present invention is not limited to the above embodiments, and various modifications 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. It goes without saying that it is one. For example, in the present embodiment, the primary transmission chain transmission device 10
2 is provided below the primary feed guide rail portion 24, but the primary feed chain transmission 102 is provided laterally if provided in the longitudinal direction of the primary feed guide rail portion 24. May be. In this case, the slit 86 is formed in the side wall of the primary feed guide rail portion 24, and the slit passage portion 90 is formed in the primary feed member 14.
May extend laterally from. In addition, the slit 86 is not formed in the primary feed guide rail portion 24,
Even if the primary feed endless chain 112 and the primary feed member 14 are connected to each other by a plate member such as the blade portion 100 of the feed arrow 16 that extends laterally from the opening of the primary feed guide rail portion 24. Good.

Further, in this embodiment, the rear guide rail portion 22 has a primary feed guide rail portion 24 and a secondary feed guide rail portion 26 which are arranged in parallel with each other, and reciprocates in the lateral direction. Has become. However, the rear guide rail portion 22 has a conventionally known structure in which one rear guide rail portion 22 for primary feeding and secondary feeding is provided, and the feeding arrow 16 retracts upward during the primary feeding. May be. In this case, the slit 86 may be formed in the rear guide rail portion 22 for both primary feeding and secondary feeding. Further, in the present embodiment, the floating prevention portion 92 of the primary feeding member 14 is a rectangular parallelepiped, and is engaged with the bottom surface of the primary feeding guide rail portion 24 to prevent the primary feeding member 14 from floating. However, the floating prevention portion may have any shape that resists the bottom surface of the primary feed guide rail portion 24 by point engagement or line engagement.

Further, the slit passage portion 90 may have any shape capable of supporting the main body of the primary feeding member 14, and may have a rod shape instead of a plate shape.
Further, in the present embodiment, the endless chains 112, 12
0,124 and sprockets 110,228,122
Alternatively, an endless belt and pulley may be adopted. Further, it is preferable that the material shelf 8 is provided with a regulating member 72, but the regulating member 72 is not essential and the shelf surface 3
The inclination angle of 0 may be reduced so that when the bar is pushed by the pushing member 44, the disorder of the row of the bar is eliminated.

Further, in this embodiment, two linear guides 46 and two ball screws are provided,
If the pushing member 44 can move in parallel to the guide rail 6, the linear guide 46 may be omitted, and only one ball screw may be used. Furthermore, in this embodiment, one motor 42 performs the primary feed and the secondary feed, which simplifies the structure and is advantageous in terms of cost. However, the power switching means 108 may be omitted, and the primary feed chain transmission device 102 and the secondary feed chain transmission device 102 may be driven by separate motors.

According to the present invention, the structure is simple, the bar can be replenished smoothly, the noise problem at the time of replenishing the bar can be alleviated, and the labor of the operator can be reduced. It is possible to provide an automatic bar feeder having a material shelf that can be used.

[Brief description of drawings]

FIG. 1 is a plan view of an automatic bar feeder according to the present embodiment.

FIG. 2 is a sectional view taken along the line II-II shown in FIG.

FIG. 3 is a partial view showing details of a bar pushing mechanism.

FIG. 4 is a partial view showing details of a bar material pushing mechanism.

5 is a cross-sectional arrow view taken along the line VV shown in FIG. 1, showing a case where the rear guide rail portion is at the primary feeding position.

6 is a cross-sectional arrow view taken along the line VV shown in FIG. 1, showing a case where the rear guide rail portion is at the secondary feeding position.

FIG. 7 is a plan view of a rear guide rail portion shown in FIG.

FIG. 8 is a side view showing a feed member drive mechanism.

9 is a detailed view of the rear end portion of the feed member drive mechanism shown in FIG.

10 is a plan view of the feeding member drive mechanism shown in FIG.

FIG. 11 is an explanatory diagram showing detection of the presence / absence of a bar by a detection unit provided on a material shelf.

FIG. 12 is a diagram showing operations of primary feeding and secondary feeding of a bar material.

[Explanation of symbols]

2 Automatic bar feeder 6 Guide rail 8 Material rack 14 Primary feed member 16 Feed arrow 20 Front guide rail part 22 Rear guide rail part 24 Primary feed guide rail part 26 Secondary feed guide rail part 30 Shelf surface 36 Bar Guide surface 38 Corner 40 Detecting means 42 Pushing member driving motor 44 Pushing member 46 Linear guide 56 Pushing member driving means 86 Slit 88 Body part 90 Slit passing part 92 Lifting prevention part 104 Secondary feed chain transmission device 104 108 Gear Switching means 110 Primary feed sprocket (rotary body for primary feed) 112 Endless chain for primary feed (endless member for primary feed) 116 Primary feed member guide section 118 Sprocket for secondary feed 120 Endless chain for secondary feed

─────────────────────────────────────────────────── ───Continued from the front page (56) References JP-A-6-704 (JP, A) JP-A-56-95511 (JP, A) Actually opened 57-34302 (JP, U) Actually opened 52- 38669 (JP, U) JP-B 50-33315 (JP, B1) JP-B 44-403 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B23B 13/10 B23B 13 / 02

Claims (2)

(57) [Claims] 1. A guide rail extending toward a bar processing machine is replenished with bar materials one by one from a material rack arranged in parallel with the guide rail, and the bar material is fed to the guide rail by a feed member. An automatic bar feeder for feeding along, wherein the shelf surface of the material shelf is, in a transverse section, on the downstream side with respect to the flow direction of the bar material flowing toward the guide rail on the shelf surface. Toward the guide rail, the push member is inclined parallel to the guide rail along the shelf surface. It extends and is provided along the shelf surface so as to be capable of translational movement between an upstream position near the upstream edge of the material shelf and a downstream position near the downstream edge of the material shelf. Pushing multiple bars placed in a row on the surface from the upstream side I, the most downstream side of the bar are extruded from said shelf surface is supplemented in the guide rail, the automatic bar feeder, characterized in that. 2. The material shelf further has a guide surface that is formed continuously with the shelf surface and that is inclined downward with respect to the flow direction of the bar, and further, the shelf surface and the guide surface. And a detection unit directed toward a boundary region between the detection unit and the detection unit, and while the detection unit detects the presence of a bar member in the boundary region, the pressing member pushes the bar member, and the bar member exists. The automatic bar feeder according to claim 1, further comprising a pressing member driving unit that stops the pressing member when it is detected that the pressing member is not operated.