JPH1199402A - Work delivery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deliver works from a machine tool such as an opposed two-axis lathe easily at a low cost. SOLUTION: A work delivery device 1 for delivering a work W from a work supporting part 4 for gripping the work W consists of a work gripping part 8 for gripping the work W, and a rotating arm 9 for moving the work gripping part 8 between the position of the work supporting part 4 and a prescribed delivery position P. The work gripping operation of the work gripping part 8 and the movement of the rotating arm 9 are conducted by an interlocking drive means 10 which operates on a single drive source. In case of an opposed two-axis lathe, carrying of the work W out of the work gripping part 8 is conducted by the retreat operation of a main spindle 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work dispensing device for dispensing a work from a work supporting portion that holds the work.

[0002]

2. Description of the Related Art Conventionally, a take-out device such as a gantry loader has been used to take out a processed work from a machine tool such as a lathe.

[0003]

However, the unloading device such as a gantry loader has the problems that not only the cost is high but also the unloading operation becomes complicated and the cycle time of the machine tool becomes long.

[0004] The present invention solves such a problem, and can discharge a workpiece from a machine tool with a simple operation.
It is an object of the present invention to provide a work dispensing device capable of reducing costs.

[0005]

A work dispensing apparatus according to the present invention is an apparatus for dispensing a work from a work supporting portion for grasping a work, comprising: a work grasping section for grasping a work; A moving member that moves between the position of the support portion and a predetermined payout position; and an interlocking drive unit that performs the work gripping operation of the work gripping unit and the movement of the moving member with one drive source. .
According to this configuration, the work gripper moves from the predetermined payout position to the work support by the movement of the moving member. In addition, after gripping the work,
The work is released by returning to the payout position by the return movement operation of the moving member. This series of operations is performed by one drive source. Therefore, the mechanism is simplified and the cost can be reduced.

[0006] In the above structure, the moving member may be constituted by a turning arm which turns around a predetermined axis. In the case of this configuration, the moving range of the work gripping portion is small, and the work can be easily discharged from a machine tool that has no allowance in the carry-out space, such as a machine tool installed in the machine body cover.

Further, in the above configuration, the interlocking driving means may restrict the turning operation of the turning arm by a conjugate cam connected to the driving source. In the case of this configuration, the turning operation of the turning arm is accurate, and the work payout operation is assured.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. This embodiment is applied to a facing two-axis lathe which is a machine tool. As shown in FIG. 8, the work dispensing device 1 removes a workpiece processed from a main shaft 4 which is a work support portion of a facing two-axis lathe 3 surrounded by a machine cover 2 and a work dispensing position P ( It is a device to pay out to Fig. 1). In the opposed two-axis lathe 3, the workpiece is gripped by the spindle chucks of the opposite main spindles 4 and 5, and the intermediate part of the workpiece is paired with one main spindle 5 while rotating the main spindles 4 and 5 synchronously. After being cut off by the tool of the turret 7 to be formed, the work held by the other main shaft 4 is processed by the tool of the turret 6 paired with the main shaft 4. One of the spindles 4 is installed on a headstock (not shown) that can be driven forward and backward in the axial direction.
The spindle 4 is moved forward and backward together with the headstock, for example, when a workpiece is transferred.

As shown in FIG. 1, the work dispensing device 1 includes a work holding portion 8 for holding a work W, and a moving member for turning the work holding portion 8 between the main shaft 4 and the work discharge position P. A swing arm 9 and an interlocking drive unit 10 for performing a work gripping operation of the work gripper 8 and a swing movement of the swing arm 9 are provided. The turning arm 9 can turn around an axis parallel to the main shaft 4.

The work gripping portion 8 is provided at the distal end of the turning arm 9, and the base end of the turning arm 9 is provided on a support member 12 A (provided on a door 11 which opens and closes an opening 2 a (FIG. 8) on the front surface of the body cover 2. It is attached to the upper part of FIG. The door 11 is a sliding door in this example. 5 and 6 show cross-sectional views of the swivel arm 9. The swivel arm 9 is formed by connecting a pair of plate members 14, 14 disposed to face each other via a plurality of spacers 15. The work gripping portion 8 is disposed at the tip of the turning arm toward the longitudinal direction of the turning arm 9, and has a pair of holding portion link pieces 17, 1 having a pad 16 fixed to an inward surface of the tip.
7, an advancing / retreating link piece 18 disposed at an intermediate position between the linking pieces 17, 17 in parallel with the linking pieces, and a parallel link mechanism connected between the linking pieces 17, 17 and the advancing / retreating link piece 18 A plurality of link pieces 19 to 22
Consists of A guide pin 23 is provided at a connecting portion between each of the link pieces 19 to 22 and the two gripping link pieces 17, 17, and these guide pins 23 are directed to the plate 14 constituting the turning arm 9 in the width direction thereof. It is engaged with each corresponding guide slot 24 formed. This allows
Both grip portion link pieces 1 are associated with the forward / backward movement of the forward / backward link piece 18.
7 and 17 approach and separate from each other.

A connecting rod 2 is provided at the rear end of the forward / backward link piece 18.
5 are connected. An arm support shaft 26 is provided near the support shaft 13 at the base end of the revolving arm 9, and the distal end of the first arm 27 fixed to the arm support shaft 26 is attached to the rear end of the connecting rod 25. It is engaged. That is, the long engagement hole 30 formed at the distal end of the first arm 27 is engaged with the engagement pin 29 projecting laterally from the rear end of the connecting rod 25. A compression coil spring 33 wound around the connecting rod 25 is provided at an intermediate portion of the turning arm 9 and is connected to the connecting rod 2.
5 is interposed between a spring supporting member 31 penetrating therethrough and a spring supporting member 32 provided at the rear end of the connecting rod 25.
Thus, the connecting rod 25 is spring-biased toward the rear end. A second arm 28, which is biased toward the base end of the turning arm 9 by a predetermined angle with respect to the first arm 27, is fixed to the arm support shaft 26, and is provided at a distal end of the second arm 28. The distal end of a work gripping drive lever 49 of the interlocking drive unit 10 described below is engaged with the guide roller 34.

The interlocking drive means 10 is provided with the swing arm 9 shown in FIG.
And a second cam mechanism 36 that causes the workpiece gripping portion 8 to perform a workpiece gripping operation.
The first cam mechanism 35 includes a pair of two cam plates 38A and 38B.
3 and 4 and a link mechanism 41 having cam followers 39 and 40 that follow the conjugate cam 38. The cam plates 38A and 38B are fixed to the drive shaft 37. The drive shaft 37 is provided on the support member 1 provided on the slide door 11 of the body cover 2.
It is supported below 2A, 12B. Link mechanism 41
Is connected to a turning drive lever 43 rotatably supported by a lever support shaft 42 supported by the support members 12A and 12B in parallel with the drive shaft 37, and a tip of the lever 43 and an intermediate portion of the turning arm 9. The pivot drive lever 43 has a bifurcated shape. Each protruding piece 43a of the bifurcated portion of the turning drive lever 43,
The cam followers 39 and 40 are provided in the 43b. A connecting portion between the turning drive lever 43 and the link piece 44 and a predetermined portion of the turning arm cover 45 extending from the slide door 11 to the inside of the body cover 2 are connected by a spring 46.

The second cam mechanism 36 has a cam 47 fixed to the drive shaft 37 and a cam follower 48 following the cam 47 and has a work gripping drive lever 49 rotatably supported by the lever support shaft 42. (FIGS. 3 and 4). The tip of the work gripping drive lever 49 is pressed against the guide roller 34 of the second arm 28 of the turning arm 9 described above. As shown in FIGS. 3 and 4, the drive shaft 37 is connected to an output shaft of a motor 50 installed on a side of the drive shaft 37. The motor 50 is connected to the first cam mechanism 3
5 and the second cam mechanism 36 are a common drive source. A spring connecting member 51 is fixed to the drive shaft 37, and as shown in FIG.
They are connected by two. Below the drive shaft 37 is a payout position P at which the workpiece gripper 8 grips and returns to the workpiece W.

The operation of the work dispensing apparatus 1 will be described. As shown in FIG. 2, when the workpiece gripping unit 8 is on standby at the payout position P, the conjugate cam 38 of the first cam mechanism 35 rotates in FIG. 10 (G1) (this rotation position is defined as the origin position). And the cam 47 of the second cam mechanism 36 is shown in FIG.
It is in the rotation position of (G2). Work W gripped by spindle 4
Is completed, the motor 50, which is the drive source of the interlocking drive means 10, is operated, and the drive shaft 37 rotates clockwise in FIG. 1 by a predetermined angle (about 90 °). As a result, the turning arm 9 turns to a position where the workpiece gripper 8 in the open state straddles the axis of the main shaft 4 and comes forward of the main shaft 4. In this state, the conjugate cam 3 of the first cam mechanism 35
8 is located at the rotation position shown in FIG.
The cam 47 of FIG. 9 is in the rotation position of FIG. 9 (A2).

Next, the workpiece W of the spindle 4 is
The chuck shaft of the main shaft 4 advances to a position where can be gripped. Next, the drive shaft 37 is moved by about 4
5 ° clockwise, the conjugate cam 3 of the first cam mechanism 35
8 is the rotation position of FIG. 9 (B1), and the second cam mechanism 36
The cam 47 of FIG. 9 is at the rotation position of FIG. 9 (B2). At this time, the turning drive lever 43 of the first cam mechanism 35 does not change, but the work gripping drive lever 49 of the second cam mechanism 36 slightly rotates clockwise. 6 is released as shown in FIG. 6, and the intermediate link piece 18 of the work gripper 8 is turned by the bias of the spring 33 wound around the connecting rod 25.
And the workpiece gripping portion 8 is closed. As a result, the work W supported by the main shaft 4 is
Is gripped.

Next, the gripping of the workpiece W by the spindle 4 is released, and the spindle 4 is retracted together with the headstock to a position where it does not hinder the work payout. That is, the work gripper 8
The main shaft 4 is retracted to an axial position where the chuck claws of the main shaft 4 do not interfere with the work gripping portion 8 even if the main shaft 4 moves. For example,
Move back to the home position. Next, by the operation of the motor 50,
When the drive shaft 37 rotates clockwise to about 180 °, the conjugate cam 38 of the first cam mechanism 35 is moved to the state shown in FIGS.
1) and FIG. 10 (E1), and the turning drive lever 43 turns clockwise. During this time, the cam 47 of the second cam mechanism 36 is turned on in FIG. 9 (C2), (D2) and As shown in FIG. 10 (E2), the work grip drive lever 49 does not rotate. Accordingly, the turning arm 9 turns while the work W is held by the work holding unit 8 until the work holding unit 8 comes to the work payout position P.

Further, when the drive shaft 37 rotates to about 270 ° by the operation of the motor 50, the conjugate cam 38 of the first cam mechanism 35 rotates as shown in FIGS. 10 (F1) and 10 (G1). The turning drive lever 43 does not change. During this time,
The cam 47 of the second cam mechanism 36 is shown in FIG.
By rotating as shown in 2), the work grip drive lever 49 slightly rotates counterclockwise. Thereby, the work grip drive lever 49 presses the second arm 28 as shown in FIG.
The intermediate link piece 18 of the work gripping part 8 advances toward the tip end of the turning arm 9 against the urging force of the spring 33 wound around the connecting rod 25, and the work gripping part 8 is opened. Thereby, the work W is released from the work holding portion 8. After this, drive shaft 3
7 further rotates 90 ° and returns to the origin position.
(G1) and (G2) are set. During this time, the turning drive lever 43 and the work gripping lever 49 maintain the same posture. In this manner, a series of operations of the cam mechanisms 35 and 36 are performed for each rotation of the drive shaft 37.

As described above, in the work unloading device 1, the operation of gripping the work W by the work gripping portion 8 and the operation of moving the work gripping portion 8 between the main shaft 4 and the work unloading position P are one. Since the motor 50 is used, the number of drive sources can be reduced, the configuration is simplified, and the cost can be reduced. In particular, when the present invention is applied to a facing two-axis lathe in which the main shaft 4 advances and retreats as in this embodiment, the work gripper 8 can simply be opened and closed, and the work W can be extracted from the work gripper 8 by the advance and retreat of the main shaft 4. Therefore, the structure can be further simplified. In addition, since the workpiece gripper 8 is moved by the pivoting operation of the pivot arm 9, the moving range of the workpiece gripper 8 can be small, and even in a machine tool in which there is not enough room in the work unloading space, the opposed two-axis lathe 3 with the machine body cover can be used. Work can be easily paid out. Further, since the interlocking drive means 10 regulates the turning operation of the turning arm 9 by the conjugate cam 38, the turning operation of the turning arm is accurate, and the work payout operation is assured. Further, since the work dispensing device 1 including the motor 50 as the driving source is provided on the door 11 of the machine body cover 2, the work dispensing device 1 can be easily replaced or maintained.

[0019]

According to the present invention, there is provided a work dispensing device comprising: a work gripper for gripping a work; a moving member for moving the work gripper between a position of a work support and a predetermined payout position; Since there is provided an interlocking drive unit for performing the work gripping operation of the unit and the movement of the moving member by one drive source, the configuration of the apparatus for paying out the work can be simplified and the cost can be reduced. In the above configuration,
When the moving member is constituted by a swivel arm that turns around a predetermined axis, the moving range of the work gripper can be small, and the extra space in the unloading space like a machine tool installed in the machine body cover is sufficient. It is possible to easily carry out the work payout from a processing device that does not have any. Further, the interlocking drive means,
When the turning operation of the turning arm is restricted by the conjugate cam connected to the drive source, the turning operation of the turning arm is accurate, and the work payout operation is reliable.

[Brief description of the drawings]

FIG. 1 is a side view showing an operation state of a work dispensing device according to an embodiment of the present invention.

FIG. 2 is a side view showing a standby state of the work dispensing apparatus.

FIG. 3 is a front view of a main part of the device.

FIG. 4 is a fragmentary enlarged view of a main part of the device.

FIG. 5 is a cross-sectional view showing a state in which a work holding portion of a turning arm of the device is opened.

FIG. 6 is a cross-sectional view showing a state in which a work holding portion of the turning arm is closed.

FIG. 7 is a sectional view of a main part of the turning arm.

FIG. 8 is an external perspective view of a facing two-axis lathe equipped with a work discharging device.

FIG. 9 is an explanatory diagram of an operation in a first half of the work dispensing apparatus.

FIG. 10 is an explanatory diagram of the latter half operation of the device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Work unloading apparatus 10 ... Interlocking drive means 4 ... Spindle (work support part) 38 ... Conjugate cam 8 ... Work gripping part 50 ... Motor (drive source) 9 ... Revolving arm (moving member) P ... Work unloading position

Claims (3)

[Claims] 1. A work dispensing apparatus for dispensing a work from a work supporting portion for grasping a work, comprising: a work grasping portion for grasping a work; and a position of the work supporting portion and a predetermined dispensing position. A work dispensing apparatus comprising: a moving member for moving the moving member between them; and interlocking driving means for performing a work holding operation of the work holding portion and a movement of the moving member by one driving source. 2. The work dispensing device according to claim 1, wherein the moving member includes a turning arm that turns around a predetermined axis. 3. The work dispensing device according to claim 2, wherein the interlocking driving means regulates a turning operation of the turning arm by a conjugate cam connected to the driving source.