JP2760129B2 - Can lid discharging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is, for example, attached to an automatic inspection apparatus for a can lid, and is a can lid discharging apparatus for discharging a completed can lid to a subsequent process at a high speed. More particularly, the present invention relates to a can lid discharging device that can reliably discharge even when the can lid is carried in a state of being fitted on a mounting table in a transfer path.

"Prior art" In the manufacturing process of can lids used for soft drink containers, etc., an automatic inspection to check the dimensions of the manufactured can lids, the presence or absence of scratches, and the state of attachment of the opening ring is essential. .

Conventionally, the operation speed of such an automatic inspection device is relatively slow.Therefore, when discharging the can lid from the inspection device, an actuator such as an air cylinder is arranged on the side of the transfer path in the inspection device, and the can lid is removed. It was configured to push out along the discharge path.

However, recently, in order to improve productivity, an apparatus for continuously and automatically inspecting a can lid at a remarkably faster speed (several hundred sheets per second) has begun to be studied.

For this reason, in the device for discharging the can lid by the reciprocating motion of the air cylinder or the like as described above, the protruding operation of the can lid must be accelerated in accordance with the operation speed of the inspection device, and the impact may damage the can lid. May be attached. In addition, vibration and noise of the apparatus are large, and the cost of driving force is also large. Therefore, a fundamentally new high-speed can lid discharging apparatus has been demanded.

The applicant has invented and developed the following high-speed can lid discharging device.

That is, the feed rollers are horizontally rotatable on both sides of the transfer path of the can lid, and the outer peripheral portions of these feed rollers are set so as to be able to simultaneously contact the can lid on the transfer path. This device is provided with a drive mechanism for rotating the can lid in a direction, and ejects the can lid by a frictional force between the feeding roller and the can lid, and discharges the can lid to a subsequent process through a discharge path.

[Problems to be Solved by the Invention] However, there is a case where the can lid is not smoothly flipped out of the transfer path by only the frictional force in the tangential direction of the feeding roller, and the can lid is not discharged.

That is, on a transfer path of an automatic inspection apparatus for a can lid, etc., a mounting table of a can lid moving along the transfer path is provided, and the can lid is carried in a state of being fitted on the mounting table for positioning. It is normal to come. For this reason, even if the can lid is caught by this fitting portion and is pulled out from the mounting table, it is not ejected with sufficient momentum and stays on a discharge path (a transfer path for guiding the ejected can lid to a subsequent process). There was a thing.

The present invention has been made in view of the above-described conventional circumstances, and is a can lid discharging device for discharging a can lid at high speed, wherein the can lid is carried in a state of being fitted on a mounting table of a transfer path. It is an object of the present invention to provide a can lid discharging device capable of reliably discharging even when it comes.

"Means for solving the problem" The can lid discharging device of the present invention is provided on both sides of a transfer path in which the can lid is conveyed horizontally. A can lid ejecting device for ejecting and ejecting the can lid from the transfer path by frictional force due to the contact, wherein an outer diameter of an outer diameter of each of the feeding rollers which comes into contact with the can lid has an upward outer diameter. The shape is inclined to be smaller,
A drive mechanism for rotating the both feeding rollers in opposite directions is connected to the both feeding rollers.

[Operation] According to the can lid discharging device of the present invention, the cans transferred between the feeding rollers in a state where the feeding rollers arranged on both sides of the transfer path are rotated in opposite directions by the driving mechanism. The lid receives a force in a tangential direction (circumferential direction of the feed roller) due to the friction caused by the contact at the moment when the outer circumference contacts the outer peripheral portions of both the feed rollers, and is lifted by receiving an upward force.

That is, since the outer peripheral portion of the feeding roller that comes into contact with the can lid has a shape that is inclined so that the outer diameter decreases upward, the contact pressure (force in the normal direction) raises the can lid. The can cover has a component in the direction of upward (upward), and the component of this force causes the can lid to be flipped out in the tangential direction of the feeding roller while being lifted.

Therefore, the feeding roller has an action of separating the can lid from the mounting table and releasing the can lid while releasing the fitting between the can lid and the mounting table.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a can lid discharging device 1 according to one embodiment of the present invention.
1 is a plan view showing a state in which is attached to an automatic inspection device 2 for a can lid.

First, the entire inspection will be briefly described. The automatic inspection apparatus 2 places a plurality of can lids K dropped one by one from the can lid supply device 3 on a mounting table S provided on the outer periphery of the turntable 4 (transfer path). , while rotating these mounting table S at a predetermined position (position from the stop position P ₂ to the stop position P ₅₎ turntable 4
Is rotated intermittently. Then, the stop positions P ₃ and P ₄
Inspection mechanisms 5 and 6 arranged in each of the dimensions of can lid K, trauma,
After examining such tab fixed state, to discharge the defective can lid at the stop position P ₆ from defective discharge passage 7, the subsequent process can lid K is a non-defective by the discharge device 1 in the stop position P ₇ from the discharge passage 8 It is designed to be discharged toward.

Here, the turntable 4 and the mounting table S are configured as shown in FIG. That is, the turntable 4 is a disk-shaped one horizontally arranged above the body 10 of the automatic can lid inspection apparatus 2 and is attached to the upper part of the rotating body 11 which is intermittently rotated by a driving source (not shown). . Cylindrical shafts 12 are vertically fixed to the outer peripheral portion of the turntable 4 at regular intervals in the circumferential direction (eight in this case), and pulleys 14 are rotatably mounted on these cylindrical shafts 12 via bearings 13. An annular mounting ring 15 is fixed to the upper surface of each pulley 14, and the mounting ring 15 forms a mounting table S for the can lid.

Then, these pulleys 14, the belt is traveling at a drive pulley disposed with the pulley 14 at the same level (not shown) is wound, the pulley 14 located to the stop position P ₂ to P ₅ in Figure 1 is They can be rotated in the same direction.

As shown in FIG. 9, a V-shaped positioning groove 16 in which an annular ridge KC on the back peripheral edge of the can lid K fits over the entire circumference is provided on the outer peripheral portion upper surface of the mounting ring 15. And the upper surface of the mounting table S is stopped at the stop position by the ventilation path 17.
In all positions except to the stop position P ₈ from P ₇ it is adapted to communicate with the suction air source, the can lid K then placing that dropped on the stage S at the stop position P ₁ (can lid supply position) It is sucked to the mounting table S and is positioned by the engagement between the ridge KC and the groove 16.

Next, the can lid discharging device 1 will be described in detail. The can lid discharging device 1 includes a discharging device main body 1a and a lead-out portion 1b.

2 and 3 are a plan view and a longitudinal sectional view, respectively, of the discharge device main body 1a.

Figure 2, those indicated by the reference numeral 20 in FIG. 3 is a base plate which is placed horizontally on the turn table 4 above the stationary table 19, on the upper surface of the base plate 20, the turntable 4 from the discharge position P ₇ Rectangular mounting plates 21 and 22 are formed at the four corners at positions adjacent to the radially inner side and outer side, respectively.
It is fixed so that the position can be adjusted by bolts 24 penetrating 3. Roller shafts 26 and 27 are vertically attached to these mounting plates 21 and 22 via bearings 25, respectively, and are mounted.
The lower ends of the roller shafts 26 and 27, the feeding roller 28 is secured to the horizontal and the same height, respectively, in both sides of that table S to the discharge position P _7.

As shown in FIG. 5, an annular flange portion 28a is formed on the outer periphery of the lower end of the feed roller 28, and a ring 2 is provided on the upper surface of the flange portion 28a and on the outer peripheral portion of the feed roller 28.
9 are mounted in two layers with the back facing. The ring 29 is made of a material exhibiting good elasticity such as resin, and is formed in a shape such that the outer diameter increases in the axial direction.The outer diameter of the lower ring 29 increases toward the lower side. Orientation, the upper ring 29 is mounted in the opposite orientation.

Here, the interval and the height of the two feeding rollers 28 are determined when the can lid K mounted on the mounting table S moves between them.
The outer periphery of the upper end flange portion KA is set so as to elastically contact the outer periphery of the lower ring 29 of each feed roller 28.

Further, as the ring 29, for example, U packing or the like used for shaft sealing can be used.

A pulley 32 of a drive mechanism D for rotating the two feeding rollers 28 in opposite directions is fixed to an upper end of the inner roller shaft 26 as viewed from the turntable 4, and a pulley is fixed to an upper end of the outer roller shaft 27. The gear 33 is fixed at a position lower than 32.

On the other hand, on the outer mounting plate 22, a drive shaft 34 is vertically mounted on the side of the roller shaft 27 via a bearing 35.
At the upper end of 34, a pulley 36 of the same height and the same diameter as the pulley 32
Is fixed, and a gear 37 of the same diameter meshing with the gear 33
Has been fixed. Further, a drive pulley 38 is fixed to a lower end of the drive shaft 34, and the drive pulley 38 is configured to be rotated via a belt 39 by a drive source (not shown).

On the other hand, an elongated mounting body 40 is mounted on the base plate 20 between the mounting plates 21 and 22 so as to be position-adjustable by bolts 42 penetrating the elongated holes 41 thereof. A pulley 44 is rotatably mounted on the mounting body 40 at the same height as the pulleys 32 and 36, and a belt 45 is wound between the three pulleys 32, 36 and 44.

 FIG. 4 is a plan view of the outlet portion 1b of the can lid discharging device 1.

In the figure, what is indicated by reference numeral 8 is the above-described discharge path 8 provided on the side of the turntable 4.

The discharge path 8 has a divided structure including an inlet section 8a and a transfer section 8b. The discharge path 8 is disposed at a height below the base plate 20 so as not to interfere with the mounting table S of the turntable 4, and is connected to the supply device 3 and the like. It is formed in a shape that curves to avoid interference.

As shown in FIGS. 6 and 7, the entrance 8a of the discharge passage 8 is composed of a pair of curved side plates 46, 47, a bottom plate 48, and a top plate 49, and the transfer unit 8b is also composed of a pair of curved plates. Side plate
50, 51, a bottom plate 52, and a top plate 53. At the joint between the entrance 8a and the transfer portion 8b, the bottom plate 48 and the bottom plate 52 are provided.
The concave portion 48a and the convex portion 52a respectively formed in the first and second portions are engaged with each other.

Here, the horizontal inner width of the discharge passage 8 is set slightly larger than the outer diameter of the can lid K, and the side plates 46 and 47 on the inlet 8a side.
Is extended to the vicinity of the feed roller 28 along the tangential direction of the turntable 4, and the can lid K flipped out by the feed roller 28 jumps into the discharge path 8 as described later. ing.

At the joint between the inlet 8a and the transfer unit 8b, the bottom plate
Preferably, the end of 48 extends slightly higher than the bottom plate 52. This can reduce the resistance of the can lid K transferred in the discharge path 8 at this joint.

As shown in FIG. 6, a nozzle 60 for jetting air (fluid) to the discharge side (post-process side) of the discharge path 8 is provided above the inlet 8a of the discharge path 8. nozzle
60 is fixedly provided on a support member 63 attached to a top plate 49 so as to be position-adjustable by a bolt 62 penetrating its long hole 61, so that the longitudinal position of the discharge path 8 can be finely adjusted. .

The nozzle 60 has its tip curved toward the discharge side (post-process side) so that the angle α between the jetting direction and the horizontal direction (the surface direction of the bottom plate 48) is within 30 degrees. Side is connected to an air source such as a compressor, and the injected air
At a position slightly closer to the inlet 8a than the joint of the discharge path 8. That is, by setting the position and the direction of the nozzle 60 in this way,
The side surface of the can lid K in which the air injected from the nozzle 60 has moved just before the seam in the discharge path 8 as shown in FIG.
It can be sprayed on KB.

In the can lid discharging device having the above configuration, when the drive source is operated, the respective feed rollers 28 rotate in opposite directions at the same speed. In this state, when the can lid K examined completed by the intermittent rotation of the turntable 4 comes transported to the discharge position P ₇ rests on the mounting table 5, the can lid K enters between the two feeding rollers 28, Since each roller 28 receives a tangential frictional force and an upward force due to the inclination of the outer periphery of the ring 29 from the ring 29, the roller 28 is almost instantly disengaged from the V-groove 16 of the mounting table S and is ejected and fed into the discharge path 8. .

That is, since the ring 29 that forms the outer peripheral portion of the feed roller 28 that comes into contact with the can lid K is inclined so that the outer diameter decreases upward, the contact pressure (in the normal direction) is reduced. The force) has a component in the direction of raising the can lid (upward). With this force component, the can lid is flipped out in the tangential direction of the feeding roller 28 while being lifted.

At the entrance 8a in the discharge path 8, the can lid K receives further force in the discharge direction by air jetted from the nozzle 60 at a position before the seam, so that the can lid K surely passes through the transfer section 8b. And discharged to the subsequent process.

According to the can lid discharge device 1 of this embodiment, irrespective of the rotation speed and the rotation interval of the turntable 4, it is possible to discharge the can lid K carried to the discharge position P ₇ reliably and in a very short time, The automatic inspection device 2 can easily cope with an increase in speed. Further, since only the frictional force from each of the feed rollers 28 is applied to the outer peripheral surface of the can lid K, the impact at the time of discharge is remarkably smaller than that of a conventional device that extrudes perpendicularly to the outer peripheral surface.
A ring 29 located on the outer peripheral portion of the feeding roller 28 and in contact with the can lid
In addition, since a material having elasticity such as urethane rubber is used, there is no danger of damaging the can lid K or denting the flange portion KA. Further, since the feed roller 28 need only be constantly rotated at a constant speed, there are advantages that the structure is simple, noise and vibration are small, and the cost is low.

Moreover, according to this apparatus, since the can lid K is lifted and ejected, there is an effect that the can lid K is reliably ejected and discharged with sufficient force without being caught in the V-groove 16 of the mounting table S.

The present invention is not limited to the configuration attached to the automatic inspection device 2 as in the above embodiment, but may be provided on a transfer path in a device for manufacturing the can lid K or the like. If necessary, each feeding roller
28 may be configured to rotate intermittently. Further, a roller opening / closing mechanism for opening / closing the interval between the feeding rollers 28 may be provided to selectively discharge only a specific can lid K.

Further, the present invention has a particularly great effect when the can lid is fitted into the mounting table and transported. However, even when the can lid is simply mounted, the can lid has an effect of eliminating frictional resistance. Therefore, the effect that the momentum for popping out the can lid can be improved is provided.

[Effects of the Invention] As described above, according to the can lid discharging device of the present invention, when the feeding rollers disposed on both sides of the transfer path are rotated in opposite directions by the driving mechanism, When the can lid is transferred between the rollers,
Since the outer periphery of the can lid comes into contact with the outer peripheral portions of the two feeding rollers, each of which is inclined so that the outer diameter decreases upward, the contact pressure applied to the can lid from the two feeding rollers ( The force in the normal direction) has a component in the direction (upward) that raises the can lid, so that the can lid is flipped out in the contact direction of both feeding rollers while being lifted. Therefore, even when the can lid is fitted and carried on the mounting table of the transfer path, an excellent effect that the can lid can be reliably discharged at high speed without damaging the can lid is exhibited. .

[Brief description of the drawings]

1 to 9 are views for explaining one embodiment of the present invention, and FIG. 1 is a plan view of an automatic can lid inspection apparatus to which a can lid discharging device according to one embodiment of the present invention is applied. Figures, 2 and 3
FIG. 4 is a plan view and a longitudinal sectional view of the main body of the can lid discharging device. FIG.
FIG. 6 is a partially enlarged view of FIG. 3, FIG. 6 and FIG. 7 are sectional views taken along lines VI-VI and VII-VII in FIG. 4, and FIG. FIG. 9 is a vertical sectional view of the can lid mounting table. K: can lid, KA: outer periphery of can lid, D: drive mechanism, 1 ...
… Can lid discharger, 4… turntable (transfer path), 28
... Feeding roller, 29... Outer peripheral portion (ring) of feeding roller.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B21D 51/44 B21D 45/04

Claims (1)

(57) [Claims] An outer periphery of a can lid is simultaneously brought into contact with an outer peripheral portion of a feeding roller which is arranged on both sides of a transfer path in which the can lid is conveyed horizontally and rotates in a horizontal plane. A can lid discharging device for popping out and discharging from the transfer path, wherein an outer peripheral portion of each of the feeding rollers which comes into contact with the can lid has a shape inclined so that an outer diameter decreases upward, A can lid discharging device, wherein a drive mechanism for rotating the rollers in opposite directions is connected to the both feeding rollers.