JPS5856082Y2 - Workpiece charging/discharging device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a workpiece loading/unloading device suitable for being installed in a machine tool.

Conventionally, machine tools such as automatic lathes have used workpiece loading and unloading devices that support the workpiece at the loading position before chucking and discharge the processed workpiece into a receiver or box. .

However, such conventional workpiece loading and unloading devices require an actuator such as a cylinder device that is used only for loading and unloading operations of the workpieces, making the device complicated.

This invention was devised in view of the above-mentioned conventional problems, and it is an object of the present invention to provide a workpiece charging/discharging device that performs charging/discharging operations in conjunction with the machining operations of a machine tool, thereby simplifying the device. With the goal.

In order to achieve the above object, the workpiece loading/unloading device according to this invention is biased into a chuck part that holds one end of the workpiece so that the workpiece can be pushed out of the chuck part when not being chucked. A chuck mechanism section including a chuck center, a tailstock that moves opposite to the chuck mechanism section and holds the other end of the workpiece, a drive rod that moves linearly in conjunction with the tailstock, and the drive rod and cam. A rotation mechanism that includes a work holder that is connected to the workpiece and can support a workpiece, and rotates the workholder between three positions: a workpiece loading position, a standby position, and a workpiece discharge position according to the movement position of the drive rod. It has a part and a part.

Hereinafter, embodiments of this invention will be described with reference to the drawings.

FIGS. 1 and 2 are explanatory diagrams showing one embodiment of the workpiece loading and unloading device according to this invention.

The chuck mechanism section 10 includes a chuck section 11 that chucks one end side of the workpiece 1, and also includes a chuck section 11 that chucks one end side of the workpiece 1.
1, there is a chuck center 12 in contact with the center of the end face of the workpiece 1, and the chuck center 12 is constantly pressed from the back side of the workpiece 1, and the chuck center 12 can be pushed out of the chuck part 11 when not chucking in work v01. A spring 13 is provided.

A tailstock 20 is disposed on the opposite side of the chuck mechanism section 10 across the workpiece, and the tailstock center 21 of the tailstock 2o moves opposite to the chuck mechanism section 1o to grip the other end of the workpiece 1. It is possible to hold it.

A drive rod 30 is integrally connected to the tailstock 20 via a connection plate 22, and a retaining pin 31 that protrudes in the radial direction is provided on the outer periphery of the front end of the drive rod 30.

That is, the drive rod 30 is configured to perform linear movement via the connection plate 22 in exactly the same way as the tailstock 20 moves.

A rotation mechanism section 40 is connected to this drive rod 30 via a cam coupling means.

That is, the rotating cylinder portion 4 is attached to the bearing portion 42 of the bracket 41.
3 is rotatably supported, and three work holders 44 are provided on the outer periphery of the rotary cylinder portion 43 and extend to the lowered position side of the workpiece 1.
is fixed, and the workpiece 1 to be machined is held in the V-groove at the tip of the work holder 44.

Furthermore, a cam groove 45 is formed on the inner circumferential surface of the rotary cylinder portion 43, with which the engagement pin 31 of the drive rod 30 engages.

A corresponding retaining pin 31 is engaged with the cam groove 45 when the tailstock 20 is in its original position, and the workpiece is kept at the workpiece loading position in a substantially horizontal state as shown in FIG. The charging groove 45A engages with the corresponding engagement pin 31 when the tailstock 20 moves to the forward end side, and the work holder 44 is held in the standby position rotated clockwise from the state shown in FIG. 2. When the tailstock 20 moves to the backward end side, the corresponding retaining pin 31 engages with the waiting groove 45B, and the work holder 44 is rotated counterclockwise from the position shown in FIG. A workpiece discharge groove 45C for holding is formed.

Note that the bracket 41 is provided with a receiving box 50, which can accommodate the workpiece 1 that falls along the upper surface of the workholder 44 when the workholder 44 is rotated to the workpiece discharge position.

Next, the operation of the above embodiment will be explained.

When the tailstock 20 is parked in its original position as shown in FIG.
Since the engaging pin 31 is engaged with the workpiece loading groove 45A of the cam groove 45, the work holder 44 is held in the substantially horizontal workpiece loading position shown in FIG.

Therefore, by placing the workpiece 1 in the groove at the tip of the work holder 44, the center axis of the workpiece 1 can be held on the insertion line connecting the chuck center 12 and the tailstock center 21.

When the tailstock 20 is moved forward from this state as shown by the arrow in FIG. The workpiece 1 is moved to the middle part of the chuck part 11 against the biasing force of the spring 13, and the third
As shown in the figure, the workpiece 1 is chucked by the chuck section 11.

Simultaneously with such movement of the tailstock 20, the drive rod 3
The engagement pin 31 of
A to the standby groove part 45B, the work holder 44 provided in the rotary cylinder part 43 rotates downward as shown by the arrow in FIG. 2 and reaches the standby position shown in FIG. 4. is maintained.

That is, in this standby position state of the work holder 44, the workpiece 1 is held at both ends by the chuck mechanism 10 and the tailstock 20, and desired machining is performed using a cutting tool or the like.

In addition, since the work holder 44 is held stationary below the workpiece 1, it does not interfere with the machining of the workpiece 1, and chips, etc. generated during cutting etc. can be smoothly discharged. .

When machining of the workpiece 1 with the workpiece holder 44 in the standby position is completed, the tailstock 20 moves backward as shown by the arrow in FIG. 3, and the tailstock center 21 is separated from the end surface of the workpiece 1. Then, the chuck center 12 pushes the workpiece 1 out of the chuck portion 11 through the biasing force of the spring 13.

At the same time that the workpiece 1 is pushed out of the chuck part 11 in this way, the engagement pin 31 of the drive rod 30 reaches the workpiece loading groove part 45A from the standby groove part 45B of the cam groove 45, and moves the workpiece holder 44 into the first position. By returning from the standby position shown in Figure 4 to the approximately horizontal workpiece loading position,
The workpiece 1 pushed out as described above is placed on the work holder 44.
The tip can be held in the groove.

From this state, when the tailstock 20 moves beyond the original position shown in FIG. 6, and rotates the work holder 44 from the workpiece loading position to the workpiece discharge position shown in FIG.

Due to this rotation of the work holder 44, the workpiece 1 is dropped and discharged along the upper surface of the work holder 44, and is stored in the receiving box 50.

In this way, when the processed workpiece 1 is completely discharged into the receiving box 50, the tailstock 20 moves forward from the rearmost position in FIG. 5 as shown by the arrow through the operation of a timer or the like. Then, it returns to its original position in FIG.

Accordingly, the engagement pin 31 of the drive rod 30 is moved from the workpiece ejection groove 45C of the cam groove 45 to the workpiece insertion groove 45.
A, the work holder 44 is rotated to the workpiece loading position as shown by the arrow in FIG. 6, and a new workpiece 1 can be loaded.

According to the above embodiment, the workpiece 1 after processing is moved to the chuck center 12 of the chuck mechanism section 10. 'The work holder 44 is moved to the outside of the chuck part 11 by the spring 13, and can be moved between three positions: a workpiece insertion position, a standby position, and a workpiece discharge position according to the movement of the tailstock 20. , the device can be simplified without requiring a special Shinonda device or the like.

In addition, the operator only needs to place the workpiece 1 in the groove at the tip of the workpiece holder 44 that is stopped at the workpiece loading position, and the workpiece 1 is chucked, processed, and discharged into the receiving box 50.
It is expected that the charging and discharging work will be simplified and shortened.

As mentioned above, the workpiece charging and discharging device according to this invention is
a chuck mechanism section that includes a chuck center within a chuck section that holds one end of the workpiece and is biased to be able to push the workpiece out of the chuck section when not being chucked; and a chuck mechanism section that moves oppositely to the chuck mechanism section; A tailstock that holds the other end of the workpiece, a drive rod that moves linearly in conjunction with the tailstock, and a work holder that is cam-coupled to the drive rod and can support the workpiece. a rotation mechanism portion that rotates the work holder between three positions, a workpiece loading position, a standby position, and a workpiece discharge position, depending on the position;
This has the effect that loading and unloading work of workpieces can be automated with a simple device.

[Brief explanation of drawings]

Fig. 1 is a partly sectional plan view showing the workpiece charging state of an embodiment of the workpiece charging/discharging device according to the present invention, and Fig. 2 is along the line ■I-■■ in Fig. 1. 3 is a partially cross-sectional plan view showing the standby state, and FIG.
A cross-sectional view along the IV-IV line in the figure, FIG. 5 is a partially sectional plan view showing the workpiece discharge state, and FIG.
FIG. 2 is a cross-sectional view taken along line VI-VI in the figure. 10... Chuck mechanism section, 11... Chuck section, 1
2... Chuck center, 13... Spring, 20
... Tailstock, 30... Drive rod, 31... Engagement pin, 40... Rotating mechanism section, 43... Rotating cylinder section,
44... Work holder, 45... Cam groove, 45A.
... Workpiece loading groove, 45B... Standby groove, 45C.
... Workpiece discharge groove.

Claims (1)

[Scope of utility model registration request] a chuck mechanism section that includes a chuck center within a chuck section that holds one end of the workpiece and is biased to be able to push the workpiece out of the chuck section when not being chucked; and a chuck mechanism section that moves oppositely to the chuck mechanism section; A tailstock that holds the other end of the workpiece, a drive rod that moves linearly in conjunction with the tailstock, and a work holder that is cam-coupled to the drive rod and can support the workpiece, and the drive rod moves. a rotation mechanism portion that rotates the work holder between three positions, a workpiece loading position, a standby position, and a workpiece discharge position, depending on the position;
A workpiece charging/discharging device characterized by having: