JP2673219B2 - Temporary retracting device for feeding bar in automatic bar feeder - Google Patents

Description

The present invention relates to a temporary retracting device for a feed bar in an automatic bar feeder, and more particularly to a temporary retracting device for a feed bar in an automatic bar feeder having a single feed guide rail. .

(Prior Art) Conventionally, generally, a primary feed guide rail and a secondary feed guide rail by a feed bar are arranged side by side, and these guide rails are switched to perform primary feed and secondary feed by a feed bar. . That is, when the bar material is received from the shelf, the primary feed guide rail is set to the feed position and the bar material is received in the primary feed guide rail to perform the primary feed. At this time, the guide rail for the secondary feed is retracted, and the secondary feed guide rail is completed. Next feed The guide rail was returned and the secondary feed was performed. However, arranging the two guide rails side by side complicates the mechanism and therefore the control,
Furthermore, an extra space for evacuation was required. In contrast to such a conventional technique, only the rear end of the feeding bar is retracted upward, the bar is received from the shelf, the primary feeding is performed by the metal fitting for the primary feeding, and after the completion of the primary feeding, the feeding bar is fed from the upper position. Japanese Patent Application Laid-Open No. 62-283486 proposes a method of carrying out secondary feeding after returning to the above.

(Problems to be Solved by the Invention) However, in the above-mentioned primary withdrawal method according to Japanese Patent Laid-Open No. 62-283486, a lifting cylinder is used to raise the rear end of the feeding bar, and the feeding bar is fixed. It used a clamping cylinder to lock it in place. Further, the feed-in bar is limited to a light-weight one in which only the rear end side is lifted and cantilevered, that is, a feed-in bar having a relatively small diameter.

Therefore, an object of the present invention is to use an automatic bar material that does not require a power source such as a lifting cylinder and a clamping cylinder, and is not limited to a lightweight feed bar, and can use feed bars of various sizes. It is to provide a temporary retracting device for the feed bar in the feeder.

(Means for Solving the Problems) The present invention has a guide rail extending in the feed direction of the feed-in bar and a first drive means, and is guided by the guide rail by being driven by the first drive means. A moving bush that slides while having a second drive means,
And a fixed bush that slides while being guided by the guide rail behind the moving bush by being driven by the second driving means, and the moving bush slides the tip end portion of the feeding bar in the feeding direction. A first feed bar support member that supports the feed bush bar, and the fixed bush has a second feed bar support member that holds the feed bar so as to fix the rear end portion of the feed bar. It is possible to pivot between a feed position for feeding the feed bar and a retracted position for temporarily retracting from the feed position, and further, the fixed bush and the movable bush pivot from the feed position to the retracted position. As described above, there is provided a temporary retracting device for the feeding bar in the automatic bar feeder, which has a pressing member that moves and presses in the lateral direction. A.

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a schematic front view for explaining that a bar is received from a shelf to a primary feed bar receiver, and at the same time, a feed bar supporting portion of a fixed bush and a moving bush is pivoted to a retracted position. 2 is a front view of the fixed bush, FIG. 3 is a side view of the fixed bush, FIG. 4 is a front view of the moving bush, FIG. 5 is a side view of the moving bush, and FIG. FIG. 3 is a plan view showing a main part of an automatic bar material feeder.

First, referring to FIG. 1, a bar material 10 (dotted line indicates a bar material having a large diameter) is provided on a slanted shelf 12 from a bar material supply arm 16
Is fed to the inclined feed table 14 in front of the shelf 12.
At the same time, the primary feed rod material receiver 18 is moved forward through the connecting block 20 by the operation of the air cylinder 22 while the rod material 10 is supported behind the stopper 18a of the primary feed rod material receiver 18 (I). It is moved from the position of to the position of (II).
When the primary feed rod material receiver 18 moves from the (I) position to the (II) position, the rod material 10 drops from the tip of the inclined feed table 14 and is formed in the lower portion of the primary feed rod material receiver 18 into a concave portion having a V-shaped cross section. Supported. This position coincides with the bar feeding position, that is, it coincides with the axis of the primary feeding of the bar and the subsequent feeding by the feeding bar.

On the other hand, a rail 26 is mounted on a base 24 of the automatic bar feeder, and a fixed bush 40 and a moving bush 42 are slidably arranged on the rail. In the drawing of FIG. 1, the fixed bush 40 and the movable bush are shown.
Since 42 is in the overlapping position and the fixed bush 40 and the moving bush 42 are very similar in construction,
The following description in the figure will be given based on the moving bush 42. The moving bush 42 has a slide block 28 slidable with respect to the rail 26, and a pedestal 30 on the slide block 28.
have. A pivot pin 32 is attached to an upper part of the pedestal 30 in an axial direction parallel to the axis of the rod feed, and a feed bar support portion 34 is pivotally attached to the pivot pin 32. A through hole 34a for slidably accommodating the feed bar 44 is formed in the upper portion of the feed bar support portion 34, and a tension spring 36 is provided between the side portion and the pedestal 30.
Is being applied. A stopper 38 is provided on the tension spring 36 side. Therefore, the feed bar support portion 34 is normally held in an inclined state in which it is pulled by the tension spring 36 and abuts against the stopper 38 as shown by the solid line. This position is the feed position of the feed bar.

As described above, when the primary feed rod material receiver 18 is held from the position (I) to the position (II), the primary feed rod material receiver 18 is
A stopper 18a of 18 pushes the feed bar support portion 34 of the moving bush 42 (and the fixed bush 40) from the side portion and holds it from the feed position shown by the solid line to the retracted position shown by the dashed line against the action of the tension spring 36. Let me down.

Next, referring to FIG. 2 to FIG.
The moving bush 42 will be described.

The fixing bush 40 is shown in FIGS. The fixed bush 40 has a slide block 28 slidable on the rails 26 of the base 24, and a mount 30 on the slide block 28. A pivot pin 32 is attached to an upper portion of the pedestal 30, and a feed bar support portion 34 is pivotally attached to the pivot pin 32. Also tension spring
A 36 is hung between one side of the infeed bar support 34 and the upper surface of the pedestal 30, and a stopper 38 is provided on the same side. Therefore, the infeed bar support portion 34 is typically in the tilted position shown. A through hole 34a is formed in the upper portion of the feeding bar supporting portion 34, and a set screw 46 is used to fix the feeding bar 44 housed in the through hole 34a. A protrusion 28a for connecting the fixed bush 40 to a chain (not shown) for moving the fixed bush 40 is formed on one side of the gantry 30.

Next, referring to FIG. 4 and FIG.
42 will be explained. Since the moving bush 42 is similar to the fixed bush 40, the difference from the fixed bush 40 will be described. A set screw is not used for the feeding bar support portion 34 of the moving bush 42, and the feeding bar support portion 34 is not used.
A bearing 48 is mounted in the through hole 34a, and supports the feed bar 44 rotatably and slidably. Also, the protruding portion of the moving bush 42 connected to the chain
28a is a slide block 28 from the protruding portion of the fixed bush 40.
It is formed closer to the chain that moves the fixed bush 40, and is arranged so that the chain that moves the moving bush does not interfere with the chain that moves the fixed bush 40.

Next, with reference to FIG. 6 which is a plan view showing the main part of the temporary retracting device for the feeding bar of the present invention, the main configuration of the temporary retracting device for the feeding bar of the present invention and a bar using the temporary retracting device The operation of feeding will be described as an example, but the present invention is not limited to this configuration and operation.
Bar feed with any suitable modification of configuration and operation is possible.

The primary feed rod receiver 18 has sprockets 64 mounted adjacent to both ends thereof, and the sprocket 64 has a chain.
68 is hung, and a part of chain 68 is a primary sending metal fitting.
62 are connected. One of the sprockets 64 is driven by a motor 66 attached to the primary feed rod receiver 18.
Therefore, the primary feed rod receiver 18 is moved from the (I) position to (I
When moving to the position I) (see FIG. 1), these members move together with the primary feed rod receiver 18 from the position (I) to the position (II) (feed position). Therefore, at the (II) position, the rod material received in the primary feed rod material receiver 18 can be primarily fed by the primary feed metal fitting 62.

The fixed bush 40 is configured to be moved by the motor 58 via the chain 50 and the sprocket 54, and the moving bush 42 is moved independently of the fixed bush 40 by the motor 60 via the chain 52 and the sprocket 56. It is configured to be.

In the state where the moving bar 42 is retracted forward, the feeding bar 44 is first fixed at its rear end to the fixed bush 40,
Next, the movable bush 42 is brought from the retracted position to the position shown in the figure, and the front end of the movable bush 42 is received in the movable bush 42.
Both ends are supported by 42.

The feed-in bar 44 does not have a finger chuck at its front end, which is conventionally used for gripping a bar. In the preferred embodiment of the invention, instead of this, a roller steady rest (not shown) arranged in front of the moving bush 42 so as to be slidably guided on the rail is used. It is configured to grip and feed the rear end. This roller steadying device is configured to hold and release a bar material by four pivotally movable rollers, and its movement is controlled by a chain, a sprocket and a motor as well as a fixed bush and a moving bush. Is.

Now, in the state shown in FIG. 6, when a bar material (not shown) is transferred from the shelf 12 to the inclined supply table 14 by the bar material supply arm 16, the primary feed bar material receiver 18 is synchronized with the air cylinder and the primary feed bar material receiver 18 is synchronized therewith. It is brought by 22 to the feed position (ie the position of the infeed bar 44 shown) and receives the bar at that position. At this time, the feed bar support portions 34 of the fixed bush 40 and the moving bush 42 are pressed by the side portions of the primary feed rod material receiver 18 and pivoted from the feed position to the retracted position (see FIG. 1).

Next, the primary feeding metal fitting 62 pushes the rear end of the bar material by the operation of the motor 66 to perform the primary feeding. At this time, the bar passes through the roller steadying device (not shown) located in the front, and the rear end is gripped by the roller steadying device at the end of the primary feeding.

Next, the air cylinder 22 is deactivated and the primary feed rod receiver 18 is returned to the initial position, and the fixed bush
40 and the feed bar support portion 34 of the movable bush 42 are returned from the retracted position to the feed position.

After that, the fixed bush 40 and the moving bush 42 are fed into the feed bar for processing by a bar processing machine (not shown).
While holding 44, move on rail 26 and feed bar
When the tip end of 44 pushes the rear end of the bar 10, the bar 10 is automatically supplied to the processing machine.

(Effects of the Invention) As described in detail above, according to the present invention, the feeding bar supporting portions of the fixed bush and the moving bush are pivotally formed between the feeding position and the retracted position, and the primary feeding rod member receiver Since they are configured to be pushed from the feed position to the retracted position, the power source (air cylinder, etc.) for retracting the feed bar is unnecessary, and the feed bar can be used as both a fixed bush and a moving bush. Since both ends of the feeding bar are supported, it is possible to use a feeding bar with a small diameter or a large diameter.

[Brief description of the drawings]

FIG. 1 is a schematic front view for explaining that a primary feed rod member receiver receives a rod member from a shelf, and at the same time, the feed bar supporting portions of the fixed bush and the moving bush are pivoted to a retracted position. FIG. 2 is a front view of the fixed bush. FIG. 3 is a side view of the fixed bush. FIG. 4 is a front view of the moving bush. FIG. 5 is a side view of the moving bush. FIG. 6 is a plan view showing the main part of the automatic bar feeder. 10 …… Bars, 12 …… Shelves, 14 …… Inclined feed base, 16 …… Bar feed booms, 18 …… Primary feed bar receivers, 18a …… Stoppers, 22 …… Air cylinders, 24 …… Groups Table, 26 …… Rail, 28 …… Slide block, 30 …… Cradle, 34 …… Feed bar support part, 36 …… Tension spring, 40 …… Fixing bush, 42 …… Movement bush, 46 …… Set screw, 48 …… Bearing, 50 …… Chain, 52 …… Chain, 62 …… Primary feeding bracket, 68 …… Chain.

Claims (1)

(57) [Claims] 1. A moving bush having a guide rail extending in the feeding direction of a feed bar, a first driving means, and a sliding bush which is driven by the first driving means to slide while being guided by the guide rail. A fixed bush that slides while being guided by the guide rail behind the moving bush by being driven by the second driving means. A first feed bar support member that slidably supports the tip end portion in the feed direction, and the fixed bush has a second feed bar support member that supports the feed bar rear end portion to be fixed; The fixed bush and the movable bush are pivotable between a feed position for feeding the feed bar and a retracted position for temporarily retracting from the feed position. A temporary retracting device for the feeding bar in the automatic bar feeder, characterized by having a pressing member that laterally moves and presses the fixed bush and the moving bush so as to pivot from the feeding position to the retracted position. .