JPS62836Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> The present invention is a machine tool in which an attachment can be attached to and removed from a vertical spindle head, and a dust-proof cover that protects the spindle head connecting part, which is the upper part of the attachment, and a dust cover that automatically removes this cover. This invention relates to a dust cover device for an attachment, which is comprised of a device that moves up and down.

<Purpose> This invention removes the dust cover from the new attachment to be used next just before attaching the spindle head, and attaches the dust cover to the used old attachment immediately after detaching the spindle head to reduce the amount of time the attachment's dust cover is not attached. The purpose is to provide a dust cover device for attachments that can be minimized.

<Embodiment> The main body 1 of the dust cover attaching/detaching device A is set up close to the side of the automatic attachment exchange device B. A cylinder 2 is vertically installed on the concave inner wall surface of the main body 1. Two slide bars 3 and 4 are vertically disposed in parallel at the upper part of the cylinder 2, and both ends of the slide bars 3 and 4 are fixed by holders 5 and 6. Slide bearings 7 and 8 are slidably mounted on the slide bars 3 and 4, and the ends of the slide bearings 7 and 8 are integrally fixed to a lifting platform 9. The lower part of the elevating table 9 can be raised and lowered via a bracket 10 using slide bars 3, 4 as guides in response to the expansion and contraction of the piston rod 11 of the cylinder 2.
A cover arm 12 is horizontally fixed to the upper end of the lifting table 9, with its tip protruding to a position near the center of the automatic attachment exchange device B. A cover receiving portion 13 is provided at the tip of the cover arm 12, and the vertical center of the cover receiving portion 13 coincides with the center of the attachment holder a when the transfer table 14 of the automatic attachment exchange device B is in the standby position S1. I've let it happen. The cover receiving part 13 is shaped like a vertically long box with two sides open perpendicular to the moving direction of the conveyance table 14, and a groove 13a is formed in the bottom part so that the cover receiving part 13 can be placed on the attachment d. The vertical rod 16 of the cover 15 is penetrated by the groove 13a, and is allowed to pass through the space within the cover receiving portion 13 together with the protrusion 17 at the tip of the vertical rod as the conveyance table 14 moves.

In addition, in the automatic attachment exchange device B, a conveyor table 14 is installed on a base 24 between an attachment exchange position S3 and an attachment exchange position S2 so as to be able to reciprocate in the horizontal direction, and an arm 20 is attached to the conveyor table 14 in a longitudinal direction at the center. The arm 20 is mounted so as to be rotatable by 180 degrees around an axis, and attachment pedestals a and b are provided at both ends of the arm 20 in the lateral direction, respectively, so as to be rotatable around a vertical axis. It is configured so that it can be moved up and down in the direction along the

Next, the operation of attaching and detaching the dust cover will be explained. When replacing attachment d in use with a new attachment, attaching and detaching the dust cover is as follows: (a) In response to an attachment exchange command, the new attachment is carried between stands 18 and 19 of automatic attachment exchange device B and placed at position P1. .

(b) The center of the conveyor table 14 moves from the standby position S1 to the position S3, which is closer to the stands 18 and 19, and the cradle a
reaches the position P1, the exchange arm 20 rises, and the attachment pedestal a holds the new attachment, and then the conveyor table 14 returns to the standby position S1, and the exchange arm 20 descends and waits. When the conveyance table 14 returns to the standby position S1, the vertical rod 16 of the dust cover 15 of the new attachment held on the attachment cradle a is loosely inserted into the groove 13a of the cover holder 13, and even after the exchange arm 20 is lowered. The protrusion 17 of the cover 15 is kept within the receptacle 13.

(c) When the old attachment d in use is finished being used, it moves together with the spindle head to the attachment replacement position P2 and stops.

(d) When the conveyance table 14 moves from the standby position S1 to the attachment exchange position S2, the exchange arm 20 rises and the attachment pedestal b holds the old attachment d, the exchange arm 20 descends, and the conveyance table 14 moves to the standby position S1. Return to

(E) Operate the cylinder 2 of the dust cover attaching/detaching device A to remove the cover arm 12 and the cover receiving part 13.
By raising the protrusion 17 of the dust cover 15 that is inside the cover receiving part 13, the dust cover 15 is removed from the new attachment.

(F) The exchange arm 20 with the old and new attachments d placed on the attachment pedestals a and b is rotated 180 degrees, and the attachment pedestal b holding the old attachment is positioned below the cover holder 13.

(g) When the cover receiving part 13 on which the dust cover 15 removed from the new attachment is suspended is lowered to the lower limit position together with the cover arm 12 and the elevator platform 9, the dust cover 15 is placed on the old attachment.

(H) Hold the new attachment on the attachment cradle a, hold the old attachment in the attachment cradle b, and attach the attachment at the attachment replacement position S2.
Then, the transfer table 14 is moved, the exchange arm 20 is raised, and the new attachment is attached to the spindle head.

(li) After lowering the exchange arm 20 and returning the carrier 14 to the standby position S1, raise the exchange arm 20, move the carrier 14 to the position S3 between the stands 18 and 19, and lower the exchange arm 20. After placing the old attachment between the stands 18 and 19, the conveyance table 14 is returned to the standby position S1.

Note that the steps (d) and (e) for attaching and removing the dust cover and the subsequent steps are changed to move the transport platform 14 to the standby position S1.
Immediately before moving the attachment to the attachment replacement position S2, remove the dust cover 15, then move the conveyance platform 14 to the attachment replacement position S2, and then rotate the replacement arm 20 after removing the old attachment from the spindle head. It is also possible to attach the new attachment to the main shaft, return the carriage 14 on which the old attachment was placed to the standby position S1, and place the dust cover 15 on the old attachment. Limited to small size transport platform 1
4 at the attachment replacement position S2 without interference with the machine body side, this can shorten the attachment replacement time.

Another embodiment other than this embodiment will be explained with reference to FIG. 4. A cover arm 12 is fixed to the main body 1, and a bracket 21 is attached to the tip of the cover arm
As a simple structure, the cylinder 2 is installed vertically through the bracket 21, and a slide part 22 is provided on the bracket 21, so that the cover receiving part 13 can slide up and down along the slide part 22 by the expansion and contraction of the piston rod 11 of the cylinder 2. There is. In this embodiment, the attachment and dust cover are relatively small and lightweight, and the lifting stroke required for attaching and removing the cover is short, and the cylinder 2, which is the lifting device C located at the tip of the cover arm 12, does not interfere with the machine body etc. suitable for cases.

<Effects> As is clear from the above description, the present invention provides a machine tool equipped with an automatic attachment exchange device having a pair of attachment cradle, in which an attachment is placed above the attachment pedestal in the standby position of the automatic attachment exchange device. It consists of a dust cover that protects the spindle head connecting part that is the upper part of the dust cover, a cover arm that has a cover receiving part that engages with the upper part of the dust cover, and a lifting device that moves the cover arm up and down. Therefore, according to the present invention, the dust cover of the new attachment is removed immediately before the spindle head is attached, and the dust cover of the used old attachment is installed immediately after the spindle head is detached, thereby minimizing the time when the dust cover of the attachment is not attached. There is an excellent effect that can be done.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an automatic attachment exchange device equipped with an embodiment of the present invention, Fig. 2 is a partially vertical front view of the main parts, Fig. 3 is an enlarged sectional view taken along the line - - of Fig. 2, and Fig. 4 FIG. 3 is a front view of another embodiment of the present invention. 1... Main body, 2... Cylinder, 3, 4... Slide bar, 5, 6... Receiver, 7, 8... Slide bearing, 9... Lifting platform, 10... Bracket, 11
... Piston rod, 12 ... Cover arm, 1
3... Cover receiving part, 14... Transport platform, 15... Dust cover, 16... Vertical bar, 18, 19... Stand, 20... Exchange arm, 21... Bracket, 22... Slide part.

Claims (1)

[Scope of utility model registration request] In a machine tool equipped with an automatic attachment exchange device having a pair of attachment pedestals, a dust cover for protecting the upper part of the attachment is provided above the attachment cradle at a standby position of the automatic attachment exchange device, and the dust cover engages with the upper part of the dust cover. a cover arm having a mating cover receiver;
A dust-proof cover device for an attachment comprising a lifting device that lifts and lowers the cover arm.