JP3053897B2 - Bar discharge device - 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 discharge device for receiving and discharging a processed bar from a bar processing machine such as a lathe having two spindles.

[0002]

2. Description of the Related Art Conventionally, when a bar processed by a bar processing machine is taken out, a bar discharging device has been used. this is,
A pipe is provided on an extension of the main shaft of the bar processing machine, and a finger chuck is slidably inserted into the pipe. When the bar is ejected, the finger chuck moves to the main shaft to receive the processed bar, returns to the original position, and releases the bar there.

[0003] In this way, it is intended to remove a processed bar material from a lathe or the like without manual intervention.

[0004]

However, the above-described conventional bar discharge device requires two spaces, that is, a bar discharge position and a pipe installation position on an extension of the main shaft of the bar processing machine. An object of the present invention is to solve such a problem.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a finger chuck for selectively gripping and releasing a bar on an extension of a main shaft of a bar processing machine; A first reciprocating drive unit for reciprocating the finger chuck between two positions: an original position set on an extension of the spindle, to which the released finger chuck returns, and a retracted position provided in parallel with the original position; A second reciprocating drive unit for reciprocating the finger chuck between two positions, a bar receiving position set on an extension of the spindle and a home position, wherein the finger chuck receives and grips a bar from the spindle; the finger when the finger chuck is returned to the original position from the bar receiving position
Receiving the bar from the chuck, the finger chuck
Grasps the bar after retreating from the original position to the retreat position.
A clamp that is held and transported to the home position;
Before the rod material gripped by the lamp escapes from the spindle, the rod
Grab the bar and move the bar together with the clamp to the home position.
After the feeding is finished, release the rod with the clamp.
Receiving a clamp and a bar released by said clamp;
The structure of the bar discharge device including a receiving portion for sending the rod to a predetermined discharge position is adopted.

[0006]

When the bar processing machine finishes processing the bar, the finger chuck at the original position is moved to the bar receiving position on the main shaft of the bar processing machine by the operation of the second reciprocating drive unit. . When receiving the bar at the bar receiving position, the finger chuck moves to the original position, returns the bar to the clamp, and returns to the original position.

After returning to the original position, the finger chuck is retracted to the retracted position by the operation of the first reciprocating drive. Thereafter, the clamp holds the bar, conveys the bar along an extension of the main shaft, and releases the bar on the receiving portion. The receiving portion receives the released bar and sends it to a predetermined discharge position.

Thereafter, the clamp returns to the original position, the finger chuck returns to the original position, and waits for the end of the processing of the next bar.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bar discharging apparatus according to the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 3, the bar discharge device includes a finger chuck 25 for selectively holding and releasing the bar on the extension line A of the main shaft of the bar processing machine, and releasing the bar. A first reciprocating drive unit for reciprocating the finger chuck 25 between an original position set on an extension line A of the main shaft to which the finger chuck 25 returns and a retreat position provided in parallel with the original position; The finger chuck 25 receives the bar from the spindle and grips the finger chuck 2 between the bar receiving position and the original position set on the extension line A of the spindle.
And a second reciprocating drive unit for reciprocating 5 and when the finger chuck 25 returns from the bar receiving position to the original position, receives the bar from the finger chuck 25, and the finger chuck 25 retreats from the original position to the retracted position. A clamp 32 for transferring and releasing the bar material on the extension line A of the spindle later.
And a receiving portion for receiving the bar released by the clamp 32 and sending the bar to a predetermined discharge position. These are installed on a gantry.

Next, each part will be described sequentially. Mount This bar discharge device is installed near a bar processing device (not shown) such as a lathe having two main spindles, and has two legs 1 as shown in FIGS. And a horizontal frame 2 extending horizontally on the legs 1.

On the horizontal frame 2, three U-shaped frames 3a, 3b, 3c are fixed at substantially equal intervals in the same direction. A line connecting the central axis of the horizontal frame 2 and the three U-shaped frames 3a, 3b, 3c is parallel to an extension line A (see FIG. 3) of the main shaft of the bar processing machine. I have.

[0012] Finger chuck finger chuck 25 is inserted so as to protrude from one side to the pipe 8. The pipe 8 moves between the two positions while supporting the finger chuck 25.

The finger chuck 25 is supported by one end of a support rod, and the support rod is inserted into the pipe 8, and a piston is fixed to the rear end. A cylinder 26 is attached to the rear end of the pipe 8, and the piston reciprocates therein. This stroke is specifically about 2 to 3 mm. When the piston comes to the left, the finger chuck 25 opens away from the opening edge of the pipe to release the rod, and when the piston comes to the right, the finger chuck moves the pipe. The bar is gripped by contacting and closing the opening edge of the bar. An air supply pipe 26a and an exhaust pipe 26b are connected to the cylinder 26, and the piston is moved by alternately performing intake and exhaust.

Thus, the finger chuck 25
Is to selectively hold and release the bar on the extension of the spindle. A first reciprocating drive unit and a second reciprocating drive unit are provided near the lower portions of the U-shaped frames 3a and 3c on both sides of the horizontal frame 2 in the first reciprocating drive unit. The rails 4a and 4b are fixed, and the first rail 4
First sliders 5a and 5b are slidably engaged with a and 4b, respectively.

On the two sliders 5a and 5b, one second rail 6 extending along the extension line A is bridged, and the second rail 6 is provided with two second sliders. 7
a and 7b are slidably engaged. And this second
The pipe 8 is stretched between the sliders 7a and 7b.

The first sliders 5a, 5b are driven by an air cylinder 9. As shown in FIGS. 2 and 3, the air cylinder 9 is pivotally supported downward with respect to the U-shaped frame 3c at the right end. On the other hand, a pin 10 is provided at the rear end of the first slider 5a, 5b.
The pin 10 and the tip of the piston rod 9a of the air cylinder 9 are respectively connected to the tip of one of the two links 11, 12 connected in a bell crank shape.

As a result, when the air cylinder 9 operates, the first sliders 5a, 5b move the first rails 4a, 4b.
The finger chuck 25 moves back and forth with the pipe 8 between two positions. These two positions are, as shown in FIG. 3, an original position on an extension line A of the main shaft and a retracted position on a line B parallel to the extension line. In parallel, and selectively stop at any position.

The second sliders 7a and 7b are driven by a motor 13. This motor 13 is a geared motor, and as shown in FIGS. 1 and 2, its output is taken out via a powder clutch 14 and an electromagnetic brake 15. It is attached along the direction of the first rails 4a, 4b. Motor 1
3 on the horizontal frame 2 near the bracket 3
6, two shafts 17, 18 are connected to the motor 1
It is pivoted up and down in the same direction as 3. The motor 1
Power of 3 is chain 19, sprocket wheel 20,
The lower shaft 18 is transmitted via a clutch 21 and a clutch (not shown). Further, the shaft 18
A chain 24 is wound horizontally between a sprocket wheel 22 fixed to the sprocket wheel 23 and a sprocket wheel 23 pivotally connected to the left first slider 5a. 7b are connected. The sprocket wheel 22 is connected to the pipe 8
It is slidably mounted on the shaft 18 via a key (not shown) so that the drive is not interrupted by the movement of.

Thus, when the clutch is engaged, the motor 13
Is transmitted to the lower shaft 18, and the second sliders 7a and 7b and the pipe 8 move via the chain 24. The finger chuck 25 is connected to the motor 1
When the motor 3 rotates forward, it moves on the extension line A of the main shaft to the bar receiving position, and returns to the original position when the motor 13 rotates reversely. When the finger chuck 25 comes to the bar receiving position, the bar is gripped by the operation of the air cylinder 26, and when the finger chuck 25 comes to the position for delivering the bar to a clamp described later, the bar is released by the operation of the air cylinder 26. .

[0020] As shown in the clamping FIGS. 1 to 3, wherein three U-shaped frame member 3a, 3b, the upper part of the 3c, an extension of the main axis A
And a third rail 27 extending in parallel with the third
Left and right third sliders 28a, 28
b is slidably engaged.

The third slider 28b on the right side is driven by the motor 13. That is,
The upper shaft 17 is separated from the lower shaft 18 by a chain, a sprocket wheel and a clutch (not shown).
Motive power is transmitted. Then, a sprocket wheel 29 is fixed to the upper shaft 17, and a sprocket wheel 30 that is paired with the sprocket wheel 29 is pivotally mounted on the left U-shaped frame 3a, and a chain 31 is wound between the two sprocket wheels 29, 30. The right third slider 28 b is connected to the chain 31.

Thus, the clutch is engaged and the chain 3
When the motor 1 is driven, the right third slider 28b moves from right to left along the third rail 27 when the motor 13 rotates forward, and moves from left to right when the motor 13 rotates reversely. Becomes Left and right third sliders 28a, 28b
Has a clamp 32 as shown in FIGS.
a and 32b are fixed respectively.

As a representative example of the left clamp 32a, this is a hook-shaped connecting member 33 connected to the third slider 28a.
And two arms 34a, 34b projecting in a cantilever manner in two rows in the horizontal direction from the connecting member 33. Guide rails 35a and 35b are horizontally fixed inside the arms 34a and 34b opposite to each other.
An air cylinder 36 is attached to the tip of 4b.

Sliders 37a and 37b are slidably engaged with the respective guide rails 35a and 35b.
The rod 6 projects between the arms 34a and 34b, and one slider 37a is connected to the rod of the air cylinder 36 via a block 38. A bracket 39 protruding above the arms 34a and 34b is fixed to the hook-shaped connecting member 33, and a pinion 40 is pivotally attached to a tip of the bracket 39. The sliders 37a, 37b
The racks 41a and 41b are fixed to the upper part of the rack, and the pinion 40 meshes with both racks 41a and 41b.

Further, claw pieces 42a, 42b for holding a bar are fixed to the lower portion of each of the sliders 37a, 37b via support members 43a, 43b, respectively. The center between the claw pieces 42a and 42b matches the extension line A of the main shaft. Thereby, the air cylinder 36
Is actuated to move the piston rod into the arms 34a, 3
When reciprocating between 4b, one slider 37a slides in conjunction with this, and the other slider 37b slides in the opposite direction by the pinion 40. The claw pieces 42a and 42b move in the same manner as the sliders 37a and 37b, and grab or release the bar on the extension line A.

The left and right third sliders 28a,
28b and the clamps 32a and 32b held by them are controlled by a sequence control circuit (not shown) as follows. The third sliders 28a, 28b and the clamps 32a, 32b are waiting at the left end position of the device as shown in FIGS. At this time,
The claws 42a, 42b of the clamps 32a, 32b are open. When the finger chuck 25 receives the bar from the main shaft and returns to the original position as described above, the clamp 32
The claw pieces 42a and 42b of the right clamp 32b grip the bar by operating the air cylinders 36a and 32b.
Then, the finger chuck 25 releases the bar, moves to the retreat position, and clears the original position.

Then, the third slider 28a on the right is driven by the chain 31, and the clamp 32b on the right grasps the bar and starts moving toward the original position. After moving for a while, the claw pieces 42a, 42b of the left clamp 32a
Grabs the bar. The point at which the left clamp 32a grips the bar is before the bar escapes from the main shaft of the bar processing machine, which is detected by a rotary encoder (not shown) attached to the shaft of the sprocket wheel 30. It has become so.

The left clamp 32a is pulled by the right clamp 32b through the bar to be gripped, and the bar is transported toward the original position by both clamps 32a and 32b. Both clamps 32a, 32b release the bar there when they transfer the bar toward the home position.

Receiving part As shown in FIG. 7, below the position where the clamps 32a and 32b release the bar, there is provided a receiving part for receiving the released bar and sending it to a predetermined discharge position. I have.
The receiving portion has a gutter body 44 extending below the extension line A along the extension line A, and vertical rails 45a and 45b for guiding the gutter body 44 in the vertical direction.

The gutter 44 is pivotally supported on two blocks 47 via a pivot 46 parallel to the extension line A, and each block 47 is slidably engaged with the vertical rails 45a and 45b. It is connected to sliders 48a and 48b. The vertical rails 45a and 45b are fixed to the horizontal frame 2. The sliders 48a and 48b are driven by an air cylinder and a parallel crank mechanism.

That is, as shown in FIGS. 1 and 2, the horizontal frame 2 between the two vertical rails 45a and 45b is used.
Are provided symmetrically with two sets of parallel crank mechanisms 49a and 49b corresponding to the sliders 48a and 48b, respectively. Gears 51a and 51b are fixed to pivots of adjacent links 50a and 50b of the two parallel crank mechanisms 49a and 49b, and the two gears 51a and 51b mesh with each other. The sliders 48 are provided on the opposite links 52a and 52b.
The levers 53a and 53b projecting to the sides a and 48b are fixed. The tip of each of the levers 53a and 53b is broken into a fork shape, which is engaged with a pin on the slider 48a or 48b (not shown). The link 50b with the gear 51b protrudes downward, and the horizontal frame 2
The tip of the rod of the air cylinder 54 pivotally supported by the shaft 50 is pivotally attached to the protruding end of the link 50b.

As a result, when the air cylinder 54 reciprocates, the two parallel crank mechanisms 49a and 49b perform a parallel motion, and accordingly, the sliders 48a and 48b move the vertical rail 45.
It moves up and down along a and 45b. A stopper 55 is provided below the block body 47, as shown in FIG.

For this reason, when the sliders 48a and 48b descend, the gutter body 44 abuts against the stopper 55 to rotate upward and discharge the bar material a thereon. A guide plate 56 for guiding the bar a and a gate plate 57 for restricting passage of the bar a are provided on the discharge side. The guide plate 56 is fixed to the side of the horizontal frame 2 via the arm plates 58a and 58b. The gate plate 57 is rotatably supported by the arm plates 58a and 58b, and can be rotated by an air cylinder 59 pivotally supported by the arm plates 58a and 58b.

Next, a series of movements of the above-described bar discharge device will be described. First, in FIG. 3, the first sliders 5a, 5b are moved from left to right along the first rails 4a, 4b by the air cylinder 9 for operating the first sliders 5a, 5b, and the finger chuck 25 is retracted. Move from position to original position. Next, the second sliders 7a and 7b
Slides along the second rail 6 so that the pipe 8
Moves the finger chuck 25 from the original position to the bar receiving position. And, by the operation of the cylinder 26,
The finger chuck 25 receives the processed bar from the main shaft of the bar processing machine and grips the bar. Thereafter, the return operation of the pipe 8 causes the finger chuck 25 to return to the original position with the bar.

Before the finger chuck 25 returns to its original position, the finger chuck 25 releases the bar, and the right clamp 32b grips the bar. Finger tea
The lock 25 moves to the retreat position after releasing the bar and returns to the original position.
Empty. Thereafter, the right third slider 28b moves from left to right along the third rail 27 by driving the chain 24. Then, the clamp 32a of the third slider 28a on the left grips the bar before the bar comes out of the main shaft. As a result, the bar material is connected to the left and right clamps 32a,
While being held by 32b, it will be conveyed above a receiving part.

When the bar material comes above the receiving portion, the clamp 32
a and 32b release the bar, and the bar falls onto the gutter 44. Next, the gutter body 44 descends due to the operation of the air cylinder 54, inclines against the stopper 55, and the bar a
To discharge. The bar a is received by the gate plate 57 and is discharged to a predetermined location by opening the gate plate 57 at a predetermined time.

[0037]

As described above, in the bar discharge device according to the present invention, the retracted position of the finger chuck can be set in parallel with the extension of the main shaft of the bar processing machine. In addition, space saving can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view of a bar discharge device.

FIG. 2 is a plan view of the bar discharge device.

FIG. 3 is a left side view of the bar discharge device.

FIG. 4 is a left side view of the clamp.

FIG. 5 is a front view of the clamp excluding an air cylinder.

FIG. 6 is a plan view of a clamp.

FIG. 7 is a left side view of a clamp and a rod receiving portion.

[Explanation of symbols]

 A: Extension line of the main shaft of the bar processing machine B: Line parallel to the extension line 2 ... Horizontal frame 8 ... Pipe 25 ... Finger chuck 32 ... Clamp 44 ... Gutter body

Claims (1)

(57) [Claims] 1. A finger chuck for selectively gripping and releasing a bar on an extension of a spindle of a bar processing machine, and a finger chuck set on an extension of the spindle to which the finger chuck releasing the bar returns. A first reciprocating drive unit for reciprocating the finger chuck between two positions: an original position and a retreat position provided in parallel with the original position; and the main spindle, wherein the finger chuck receives and grips a bar from the main spindle. A second reciprocating drive unit for reciprocating the finger chuck between two positions, a bar receiving position set on the extension of the bar and the original position, and the finger chuck moving from the bar receiving position to the original position. When returning, the finger
Receiving the bar from the chuck, the finger chuck
Grasps the bar after retreating from the original position to the retreat position.
A clamp that is held and transported to the home position;
Before the rod material gripped by the lamp escapes from the spindle, the rod
Grab the bar and move the bar together with the clamp to the home position.
After the feeding is finished, release the rod with the clamp.
Receiving a clamp and a bar released by said clamp;
A bar discharging device comprising: a receiving portion that sends the rod to a predetermined discharging position.