JPH0735759Y2 - Finishing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is to obtain a final product by removing excess portions such as burrs present in an intermediate product such as an oil seal vulcanized and molded by a mold. And a finishing device.

(Prior Art) Conventionally, as a finishing apparatus of this type, there is one as shown in FIG. 6, for example. That is, 100 is a work formed by vulcanization molding or the like, and a burr 102 as a surplus portion formed at the time of molding exists on the outer periphery of the work. The work 100 is held by a jig 101, and a burr 102 is cut from the work 100 by cutting with a knife 103 for finishing along the line aa shown in the drawing. On the other hand, the work 100 on the jig 101 from which the burr 102 has been removed is pushed upward by the lifter means 104 that comes into contact with the work 100 from below, and is forcibly separated from the jig 101.

After that, a lifter means 10 is provided by a work take-out device (not shown).
The work 100 on the 4 is taken out and conveyed, and the burr 102 remaining on the lifter means 104 is discharged by using air or a suction device.

(Problems to be solved by the invention) However, in the case of the above-mentioned conventional technique, the work 100
When the lifter means 104 is lifted in order to disengage the workpiece from the jig 101, the burr 102 dropped on the lifter means 104 becomes the work 100.
10 and the lifter means 104, and burrs 10 on the work 100.
2 may be stuck and may not be separated from the work 100.
This is especially likely to occur in rubber vulcanization molded products such as oil seals.

When the burr 102 cut in this way adheres to the work 100, the burr 102 is taken out together with the work W in the subsequent process,
The trouble caused by Bali 102 sometimes occurred.

In addition, the burrs 102 may drop and scatter around the apparatus while the work 100 is being taken out and conveyed. In addition, Bali 102
There was a case where the particles fell on the jig 101 and were sandwiched between the next work 100 and the jig 101, and the cutting position of the work 100 was deviated to cause defective finishing.

Further, as another problem, when the burr 102 cut in the finishing stage falls on the lifter means 104, the fall position of the burr 102 may be displaced from the center of the jig 101.
In that case, when the work 100 is detached from the jig 101, the work 100 partially rides on the burr 102 and tilts and becomes horizontal, which causes a trouble depending on a method of taking out and carrying out the work 100.

The present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to prevent contact between the work and the surplus part separated from the work when the work is detached from the jig. And to provide a finishing device capable of surely separating the work and the surplus portion.

(Means for Solving the Problem) In order to achieve the above object, in the present invention, a rotatable jig, and a finishing means for cutting a surplus portion held on the jig and rotating. In a finishing device having a lifter means for forcibly removing the work from the jig by abutting the cut work from below and pushing the work upward, the lifter means removes the entire surplus part removed from the work. In addition to providing a storage part that opens upward to enable storage,
It comprises a holding plate capable of covering the opening of the storage part and holding the surplus portion, and a drive means for moving the holding plate forward and backward to a position retracted from the storage part and a position covering the storage part. A holding means is provided.

(Operation) In the finishing apparatus having the above configuration, the surplus portion removed from the work by the finishing means is dropped into the storage portion provided in the lifter means. The holding plate of the holding means is in a position retracted from the storage portion by the driving means when the surplus portion is dropped into the storage portion, and after the surplus portion is dropped into the storage portion, the driving portion covers the storage portion to remove the surplus portion. Hold. Therefore, when the work is released from the jig after the surplus portion is removed, the work does not come into contact with the surplus portion that has dropped onto the lifter means. In particular, if a part of the excess part protrudes from the storage part and the lifter means is raised in that state, the work and the excess part will come into contact with each other. The part is separated from the work when the work is taken out and carried out, and only the work can be taken out and carried out.

(Example) Below, this invention is demonstrated according to the example of illustration. 1 to 5 showing a finishing apparatus according to an embodiment of the present invention
In the figure, reference numeral 1 denotes the entire finishing apparatus, which generally includes a jig 2 for detachably holding a work W, and a finishing means 3 for cutting an excess portion of the work W held on the jig 2.
And a lifter means 4 for forcibly separating the work W from the jig 2.

The apparatus of this embodiment is also intended for a vulcanization molded product made of a rubber-like elastic body such as an oil seal as the work W as in the conventional example, and the burrs 5 at the time of molding are used as an excess portion of the work W.
Is to be removed. The work W is an annular member having a cylindrical outer peripheral surface, and the burr 5 extends over the entire circumference from one end edge of the work W outer circumference.

The jig 2 is provided with an engagement protrusion 21 that engages with the work W, and holds the work W in a horizontal state with the burr 5 facing downward. The outer diameter of the jig 2 is smaller than the outer diameter of the work W, and the outer diameter side of the work W projects outside the outer circumference of the jig 2 while being held on the jig 2. In order to hold the work W, it is necessary to hold the work W so that the work W does not move when the burr 5 is cut. For example, the jig 2 is suction-held by providing a ventilation hole in the jig 2 and drawing a vacuum.

The jig 2 is rotatable about its central axis and is drive-controlled via a drive source and a transmission mechanism (not shown).

A knife for cutting the burr 5 is used as the finishing means 3 and is arranged in the vicinity of the jig 2. Then, the burr 5 is cut along with the rotation of the work W by linearly moving the blade edge toward the burr 5 of the work W in the direction of the arrow in the drawing.

On the other hand, the lifter means 4 includes a lifter plate 41 having an insertion hole 6 into which the jig 2 can be inserted in the center, and a lift drive means (not shown) for moving the lifter plate 41 in the central axis direction of the jig 2. It consists of and. The diameter of the insertion hole 6 of the lifter plate 41 is smaller than the outer diameter of the work W, and the hole edge portion of the upper surface thereof abuts the lower end of the work W.

In addition, an annular concave groove 7 as a storage portion for dropping and storing the female cut burr 5 is provided in the work contact portion on the inner surface on the inner side of the lifter plate 41.

The groove 7 has a rectangular cross section, the inner wall surface of the concentric opposed wall is smaller in diameter than the burr inner diameter of the workpiece to be cut, and the outer wall surface is burr-shaped. It is larger than the outer diameter.

Further, the depth of the concave groove 7 is set to be larger than at least the vertical thickness of one burr 5 to be cut,
The entire burr 5 is completely housed in the groove 7 and hidden inside the groove. In this illustrated example, the depth of the concave groove 7 is set to about 2 to 3 times the depth of the burr.

Further, in this example, burr holding means 8 for holding the burr 5 housed in the concave groove 7 is provided. The burr holding means is provided at one place in this example, and the concave groove 7 is provided.
And a drive means 82 for moving the holding plate 81 back and forth with respect to the concave groove 7.

The holding plate 81 is reciprocally movable in the radial direction of the lifter plate 41 along a guide groove 83 formed on the upper surface of the lifter plate 41, and the upper surface thereof is at the same position as the upper surface of the lifter plate 41.

On the other hand, as the drive means 82, an air pressure or hydraulic cylinder is used in this embodiment. Ie cylinder
84 is attached to the lower surface of the lifter plate 41 and is a telescopic rod.
The holding plate 81 is operatively connected to the holding plate 81 via a connecting rod 87 that is inserted into an elongated hole 86 formed in the lifter plate 41. Then, the rod 85 is contracted to retract the holding plate 81 from the groove 7, and the rod 85 is extended to cover the groove 7. The drive means of the holding plate 8 is not limited to the cylinder 84, but the holding plate 81 may be reciprocally moved by using a motion conversion mechanism such as a rack and a pinion with a rotary motor as a drive source. Drive control can also be performed by a linear motor.

Further, although the holding plate is reciprocally moved in this embodiment, it may be rotated to be moved forward and backward from the concave groove 7.

Further, this holding means can be provided not only at one place but also at a plurality of places.

Next, the operation of the finishing device having the above configuration will be described.

First, as shown in FIG. 2, the jig 2 is rotated by a rotation driving means (not shown), and the work W is supplied to and held by the jig 2 by a work supply device (not shown). In this state, the telescopic rod 85 of the burr holding means is in the contracted state, and the holding plate 81 is in the retracted position.

Next, as shown in FIG. 3, the knife of the finishing means 3 advances in the direction of the arrow in the figure, and the burr 5 on the outer periphery of the work W is cut.
The cut burr 5 falls downward by its own weight and is housed in the concave groove 7 provided in the lifter plate 41.

When the removal of the burr 5 is completed, the rotation of the jig 2 is stopped.

Next, the telescopic rod 85 of the burr holding means 8 extends to hold the holding plate.
81 advances to the groove 7, the opening of the groove 7 is covered, and the burr 5 in the groove is held.

Then, as shown in FIG. 4, the lifter plate 41 of the lifter means is lifted while the rotation of the jig 2 is stopped. Then, the insertion hole hole edge 42 of the lifter plate 41 contacts the lower end surface of the work W, and when the lifter plate 41 is further raised, the work W is lifted and the work W is forcibly separated from the jig 2.

Next, the work W separated on the lifter plate 41 is taken out and carried out by a take-out device (not shown). As the take-out device, various methods such as blowing with air, vacuum suction, magnetic suction or the like can be adopted.

Here, even if a part of the burr 5 protrudes from the concave groove 7 and hangs on the insertion hole hole edge 42 of the lifter plate 41 and comes into contact with the work W as the lifter plate 41 rises, the burr 5 is retained. Since it is held by the plate 81, the burr 5 is not likely to be taken out together with the work W.

On the other hand, when the work W has been taken out, the expansion rod 85 of the burr holding means 8 is contracted again to retract the holding plate 81 from the concave groove 7, and the opening of the concave groove 7 is opened. And this groove 7
The burr 5 is discharged by a burr discharging device (not shown) (see FIG. 5).

If it is difficult to eject the burr 5, lifter plate
A blowout hole for gas such as air may be provided in the bottom surface of the concave groove 7 of 41, and burr may be blown up at the time of discharge to assist the discharge.

After discharging the burr 5, the lifter plate 41 is lowered again, the jig 2 is passed through the center insertion hole 6 of the lifter plate 41, and the lifter plate 41 as shown in FIG. It will be returned to its original position.

By repeating the above-mentioned operation, the work is finished one after another.

In the above embodiment, the vulcanization molded product of rubber was used as an example of the work W, but it can be widely applied to the burr removal of molded products of other various resins.

Further, in the above-described embodiment, the case of removing the burr 5 on the outer peripheral side of the work W has been described, but the same can be applied to the case of removing the burr on the inner peripheral side.

Further, the surplus portion of the work is not limited to the burr, but may be applied to finish a work which is formed by previously providing a cutting allowance.

(Effects of the Invention) The present invention has the above-described configuration and operation, and since the surplus portion removed from the work is completely stored in the storage portion provided in the lifter means, the work and the surplus portion can be reliably separated. Therefore, the trouble of the post process due to the surplus portion is eliminated. Further, even if a part of the surplus portion protrudes from the storage portion and is in contact with the work, the surplus portion is not taken out together with the work because it is held in the storage portion by the holding means.

Therefore, the surplus portion such as burrs does not scatter when the work is taken out and conveyed, and the periphery of the apparatus is not contaminated, and it is possible to prevent the finish defect of the work due to the drop of the surplus portion.

Further, since the work does not come into contact with the removed surplus portion when the work is detached from the jig, the work can be held horizontal on the lifter means and the work can be taken out and carried out smoothly.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an essential part of a finishing apparatus according to an embodiment of the present invention, and FIGS. 2 to 5 are schematic sectional views of an essential part showing respective steps of finishing a workpiece by the apparatus shown in FIG. FIG. 6 is a schematic cross-sectional view of a conventional finishing device, and FIG. 7 is a schematic cross-sectional view of the work separating process of FIG. DESCRIPTION OF SYMBOLS 1 ... Finishing processing device, 2 ... Jig 3 ... Finishing means, 4 ... Lifter means 5 ... Burr (excess portion), 7 ... Recessed groove (storage section) 8 ... Holding means, 81 ... Holding plate

Claims (1)

[Scope of utility model registration request] 1. A rotatable jig, finishing means for cutting a surplus portion of a workpiece held on the jig and rotating, and abutting the surplus portion cut work from below and pushing it upward. And a lifter means for forcibly detaching the work from the jig by means of the above-mentioned lifter means. Means for holding the surplus portion by covering the opening of the storage part, and a holding means for moving the holding plate forward and backward to a position retracted from the storage part and a position covering the storage part. A finishing device characterized by being provided with.