JPH035398Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a workpiece conveyance device for a lathe, and particularly to a conveyance device suitable for inserting a heavy workpiece into the chuck of a lathe.

[Conventional technology]

When trying to insert a heavy workpiece into the chuck of a lathe, conventionally a hoist was used to hoist the workpiece with a wire, and a pendant was used to move the workpiece up and down, left and right, and back and forth to insert it into the chuck.

[Problem that the invention attempts to solve]

However, when a hoist is used to lift a workpiece with a wire and move it, the workpiece sways due to inertia, making its position unstable, making it difficult to insert into the chuck, and furthermore, there is a risk of the workpiece colliding with the lathe body or surrounding equipment. It was hot. In particular, when operating the pendant to align the centers of the workpieces when inserting them into the chuck, the adjustment was difficult and required skill.

The present invention was developed in view of the above-mentioned points, and allows for easy and safe insertion of a heavy work into the chuck, as well as easy alignment of the center of the work with the center of the chuck. It is an object of the present invention to provide a workpiece conveyance device for a lathe that can carry out the following operations.

[Means for solving problems]

This invention is a lathe workpiece transfer device for inserting workpieces into the chuck of a lathe, and the base end of a multi-jointed arm is attached to a support vertically fixed to the floor so that it can rotate around the support. and an adjustment arm is rotatably attached to the tip of the multi-joint arm via a shaft attached parallel to the main axis of the lathe,
The lower end of a substantially U-shaped frame is rotatably attached to one end of this adjustment arm via a shaft attached parallel to the column, and a substantially U-shaped workpiece is attached to the vertical column of this frame. The vertical column part of the stand is slidably mounted, an adjustment screw for pressing the workpiece is screwed into the upper end of this frame, and this adjustment screw screwed into the lower part of this adjustment screw is screwed into the frame. A male threaded portion having a pitch twice that of the threaded portion is formed, and a female threaded portion that engages with the male threaded portion is formed at the upper end of the workpiece mounting base, and the workpiece mounting base is attached to the workpiece mounting base through these threaded portions. and the lower end of the adjusting screw, the workpiece is pressed and clamped, and the center of the workpiece is always aligned with the center of the chuck of the lathe.

[Effect]

According to the above configuration, if the multi-joint arm is installed at approximately the height of the chuck of the lathe, the workpiece conveyed from the chute can be placed on the workpiece mount provided at the tip of the multi-joint arm, and the workpiece can be adjusted using the adjustment screw. By fixing the workpiece to this mounting base, the center of the workpiece can always be located almost at the center of the chuck, regardless of the outside diameter of the workpiece, and the multi-jointed arm can be placed on the support. The workpiece can be easily inserted into the chuck by rotating it around the chuck.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, one embodiment of a lathe workpiece conveying device according to the present invention will be described in detail with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 to 6.
A column 1 is fixed perpendicularly to the floor surface by a bolt 2 near the main axis of the lathe, and one end of a first arm 4 is rotatable at the upper end of the column 1 via a shaft 3 provided on the column 1. Possibly installed.
One end of a second arm 6, which is provided with a knob 5 at the other end of the first arm 4, is connected via a shaft 7 provided on the second arm 6 parallel to the shaft 3 of the support column 1. It is rotatably mounted. Further, one end of a third arm 8 is rotatably attached to the other end of the second arm 6 via a shaft 9 provided on the third arm 8 parallel to the shaft 3 of the support 1. It is being A workpiece attachment part with a centering device is attached to the other end of the third arm 8 so that its center is located at approximately the same height as the center of the main shaft of the lathe. This workpiece attachment section with a centering device is composed of an adjustment arm 10, a frame 11, a workpiece attachment 12, and an adjustment screw 13.
The fourth arm 10 has its central portion connected to the other end of the third arm 8 via an axis 14 parallel to the floor.
As shown in FIG. 3, two stopper arms 15 are formed at one end of this fourth arm 10 to clamp the third arm 8. I'm starting to do that. Adjustment screws 16 are threaded onto each of these stopper arms 15. third arm 8
An upper stopper 17 and a lower stopper 18 are fixedly attached to the upper stopper 17 and lower stopper 18 to regulate the upper and lower limit positions of rotation of the stopper arm 15, and the tip of the adjustment screw 16 can come into contact with the lower stopper 18. . These stoppers 17 and 18 allow the fourth arm 1 to
The rotation angle of 0 is regulated to a relatively small angle, and the reduction 19 between the tip of the adjustment screw 16 and the lower stopper 18 when the fourth arm 10 comes into contact with the upper stopper 17 can be adjusted. This allows the rotation angle of the fourth arm 10 to be set arbitrarily. At the other end of the fourth arm 10 opposite to the side on which the stopper arm 15 is formed, the lower end of a frame 11 formed in a substantially U-shape is connected to a shaft 20 and a thrust bearing provided parallel to the pillar 1. It is rotatably attached via 21. Furthermore, a shaft 20 is provided at the upper end of the frame 11.
An adjustment screw 13 with a handle 22 fixedly attached to the upper end is threaded substantially coaxially with the handle. Furthermore, a male thread 24 with twice the pitch of the upper thread 23 of the adjustment screw 13 screwed into the frame 11 is formed at the bottom of the adjustment screw 13, and this male thread 24 has a slightly smaller screw than the frame 11. A female thread 25 formed at the upper end of the U-shaped workpiece mounting base 12 is screwed into the workpiece mounting base 12 . Furthermore, this workpiece mounting base 12 has a square groove formed in the U-shaped vertical column, and is fitted into a square column formed in the vertical column of the frame 11, so that it can be slid in the vertical direction. . 2
Reference numerals 6 and 27 are holding devices for preventing the workpiece mount 12 from falling off the frame 11, and are fixed to the frame 11 by bolts 28 and 29, respectively. A receiving plate 31 on which a cylindrical workpiece 30 is placed is attached to the lower part of the workpiece mounting base 12, and a V-groove 32 is formed to prevent the workpiece 30 from being transferred.

Next, the operation of this embodiment will be explained. The V of the receiving plate 31 of the workpiece mounting base 12 is adjusted to almost the same height as the cylindrical workpiece 30 carried near the lathe.
Place it on the groove 32. Next, the adjustment screw 13 is rotated by the handle 22, and the outer circumference of the workpiece 30 is clamped between the lower end surface 13a of the adjustment screw 13 and the V-groove 32. At this time, the adjustment screw 13 is inserted 2 times from the upper screw 23 screwed into the frame 11.
Since the frame 11 and the workpiece mount 12 are screwed together with the workpiece mount 12 via the male screw 24 of double the pitch, the frame 11 and the workpiece mount 12 move relative to each other through the sliding part, and when the workpiece 30 is clamped, the workpiece 30 is removed. The center of the workpiece is always located at a constant position, that is, the center of spin, regardless of the diameter (see FIGS. 5 and 6). Then, the clamped workpiece 30 is moved by the three arms 4, 6, and 8, and is inserted and fixed into the claw part 34 of the chuck 33 provided at the end of the main shaft of the lathe. At this time, work 3
If the deflection of the entire conveyance device differs due to the difference in the weight of 0, the center of the workpiece 30 and the center of the chuck 33 are not concentric, and the workpiece cannot be inserted into the claw portion 34 of the chuck 33, the fourth arm 10 is By rotating the workpiece 30 around the center, the height of the workpiece 30 can be finely adjusted and inserted.

According to this embodiment, when attaching a heavy workpiece 30 to the chuck of a lathe, the workpiece is carried to the chuck 33 by a multi-joint arm and attached, instead of being lifted by a wire or the like as in the conventional case. The workpiece 30 can be moved stably without shaking, and the workpiece 30 can be prevented from colliding with a lathe or the like. Further, when inserting the workpiece 30 into the chuck 33, the center of the workpiece and the center of the chuck can be easily aligned, so that the number of work steps can be reduced. According to experiments conducted by our inventors, the time required to attach the workpieces 30 to the lathe was approximately 3 minutes per piece using the conventional method, but was reduced to approximately 0.5 minutes using this embodiment.
It has become possible to significantly reduce man-hours.

In the above-described embodiment, the case where there are four arms has been described, but the number of arms may be increased or decreased depending on the situation. Further, the shape of the workpiece 30 may be other than a cylinder, and the same effect can be obtained by changing the shape of the receiving plate 31 and the like.

[Effect of idea]

As described above, according to the present invention, the workpiece is transported by a multi-joint arm, and a workpiece fixing device with a centering device is provided at the end of the multi-joint arm, so even if the workpiece is heavy, it can be easily transported. Moreover, it can be safely inserted into the chuck, and the center of the workpiece can be easily aligned with the center of the chuck.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the lathe workpiece transfer device according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a plan view showing the fourth arm of FIG. 1. , FIG. 4 is a side view of FIG. 1, FIG. 5 is an enlarged front view showing the main parts of FIG. 1, and FIG. 6 is a front view showing the operation of this embodiment. 1... Support column, 3, 7, 9, 14, 20... Axis,
4, 6, 8...Arm, 10...Adjustment arm, 1
1...Frame, 12...Work mounting stand, 13,
16...adjustment screw, 17...upper stopper, 18...
...Lower stopper, 23...Top screw, 24...Male thread, 25...Female thread, 30...Work, 33...
Check.

Claims (1)

[Claims for Utility Model Registration] (1) In a lathe workpiece transfer device for inserting a workpiece into the chuck of a lathe, a multi-jointed arm is mounted on a support that is fixed perpendicularly to the floor surface, with the support as an axis. The base end is rotatably mounted, an adjustment arm is rotatably mounted on the tip of this multi-jointed arm via a shaft attached parallel to the main shaft of the lathe, and one end of this adjustment arm is connected to the support column. The lower end of a roughly U-shaped frame is rotatably mounted via a parallel shaft, and the vertical column of a roughly U-shaped workpiece mount can be slid onto the vertical column of this frame. An adjustment screw for pressing the workpiece is screwed into the upper end of the frame, and a pitch twice as large as the pitch of the threaded part of the adjustment screw screwed into the frame is screwed into the lower part of the adjustment screw. forming a male threaded portion having a threaded portion, and forming a female threaded portion threadedly engaged with the male threaded portion at the upper end portion of the workpiece mount, and screwing the workpiece mount to a lower portion of the adjustment screw via these threaded portions; The workpiece is pressed and clamped between the workpiece mounting base and the lower end of the adjustment screw, and the center of the workpiece is always aligned with the center of the chuck of the lathe. Workpiece conveyance device for lathes. (2) The rotation range of the adjustment arm is regulated by a vertical stopper fixed to the distal arm of the multi-joint arm, and the angle is adjusted by an adjustment screw attached to the distal arm. A workpiece conveyance device for a lathe according to claim 1 of the utility model registration claim.