JP3435536B2 - Method and apparatus for centering ceramic products - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for centering a ceramic product.

[0002]

2. Description of the Related Art In the manufacture of pottery products such as bowls, pots and umbrella stands, clay is mainly used as a raw material.
It is well known that various processes such as molding, drying, finishing, glazing, and firing are performed. It is also well known that the ceramic product is centered before the finishing of the ceramic product after the drying process.

Therefore, there have been many techniques in the art relating to the centering of ceramic products. However, in all of the conventional techniques, centering is performed by bringing a centering roller or the like into contact with the outer peripheral surface of the ceramic product (JP-A-9-141622 and JP-A-8-57819). Publications, Japanese Examined Patent Publication No. 1-58041 and Japanese Utility Model Publication 1-36.
564).

However, recently, for the purpose of improving the design and aesthetics of the ceramic product, the outer peripheral surface is formed into a three-dimensional shape such as a polygon or a wavy shape, or the outer peripheral surface of the ceramic product after drying is formed. Ceramic products tend to be three-dimensionally patterned by cutting or the like.

Therefore, when observing a ceramic product having a three-dimensional pattern, the inner peripheral surface is generally circular, but the outer peripheral surface is non-circular.

However, the conventional centering technique described above is
Since the present invention is exclusively applied to a ceramic product having an outer peripheral surface having a circular shape, centering of a ceramic product having a circular inner peripheral surface and a non-circular outer peripheral surface as a theme of the present invention However, there is a problem in that the conventional technique cannot be applied because the three-dimensional shape of the outer surface becomes an obstacle.

On the other hand, unlike the above-mentioned technique, a ceramic product is photographed by an image pickup means such as a CCD camera, and the photographed image information is converted into binary data and arithmetically processed to determine the center of gravity of the ceramic product. It is known to obtain data and center a ceramic product using a multi-axis control robot or the like based on the data of the center of gravity (Patent No. 254224).
(See Japanese Patent No. 6).

According to this apparatus, regardless of the kind of the ceramic product, there is an advantage that the centering can be performed extremely accurately, but an expensive CCD camera, a robot, a computer for data processing, etc. In addition to the above equipment, it required advanced knowledge of programs and controls for handling these equipment.

Further, it is necessary to properly arrange the ceramic product with respect to the photographing position of the CCD camera, and in order to accurately photograph the ceramic product, consideration should be given not to change the light amount near the CCD camera and the CCD camera. It was not easy to use because it was necessary to improve the environment such as dust countermeasures for the lens.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is easy to center a ceramic product having a circular inner peripheral surface and a non-circular outer peripheral surface. Another object of the present invention is to provide a method for performing the above and a simple centering device.

[0011]

The invention of a method for centering a ceramic product according to claim 1 is a method for centering a ceramic product having a circular inner peripheral surface.
The table is provided with a rotary shaft vertically movable above the table, and at least three pushers are provided at one end of the rotary shaft. These pushers are centered on the axis of the rotary shaft. It is controlled so as to be displaceable on a concentric circle, and after the ceramic product is placed on the table, the rotary shaft is lowered toward the inside of the ceramic product to rotate the rotary shaft, and at the same time, presser the shaft of the rotary shaft. The ceramic product is placed on the table by displacing it on a concentric circle centered on the core, bringing the displaced presser member into contact with the inner peripheral surface of the ceramic product, and pressing the inner peripheral surface of the ceramic product with the presser member. The feature is that the axis of the rotating shaft and the center of the ceramic product are aligned with each other.

A second aspect of the invention of the method for centering a ceramic product is the method according to the first aspect, wherein the table is rotated in the same direction as the direction of rotation of the rotary shaft, and the presser is used in the ceramic product. It is characterized by being brought into contact with the peripheral surface.

According to a third aspect of the invention, there is provided a table for placing a ceramic product, a table for mounting the ceramic product is provided, and a rotatable shaft capable of moving up and down is provided above the table, and at least the rotary shaft is provided. While one end of each of the three pusher support members is pivotally attached, each pusher is provided at the other end of the pusher support member, and the pusher support member is swingable with respect to the rotation shaft. The presser is provided so as to be displaceably controlled on a concentric circle centered on the axis of the rotary shaft.

According to a fourth aspect of the invention, there is provided a centering device for a ceramic product, wherein in the third aspect of the invention, the pusher is rotatable.

The invention of the centering device for a ceramic product according to claim 5 is the invention according to claim 3 or 4, characterized in that the table is movable in the horizontal direction.

The invention of a centering device for ceramic products according to claim 6 is the invention according to claim 3 or 4, characterized in that the table is rotatable in the same direction as the direction of rotation of the rotary shaft. It is a thing.

[0017]

According to the first aspect of the present invention, since the ceramic product has the circular inner peripheral surface, centering can be easily performed regardless of the shape of the outer peripheral surface.

According to the second aspect of the present invention, since it has the above-mentioned structure, the inner peripheral surface of the ceramic product is not damaged even if it is easily damaged.

According to the third aspect of the present invention, since it has the above-mentioned structure, the centering can be easily performed by a simple mechanical means regardless of the shape of the outer peripheral surface of the ceramic product.

According to the fourth aspect of the present invention, since the pressing element rolls under the action of the rotation shaft when the presser presses the ceramic product, the inner peripheral surface of the ceramic product is There is no risk of damage.

According to the fifth aspect of the present invention, since the ceramic product is moved in the horizontal direction together with the table due to the pressing of the pressing member, the ceramic product is delusionally moved with respect to the table. There is no possibility of causing damage due to contact with the table.

According to the sixth aspect of the present invention, since the table has the above-described structure, the pusher displaced by the rotation of the rotary shaft when the table is rotated in the same direction as the rotation of the rotary shaft is a ceramic product. When the ceramic product is brought into contact with the inner peripheral surface, the ceramic product is not impacted by the presser, and damage to the ceramic product by the presser can be prevented.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION A method for centering a ceramic product according to an embodiment of the present invention will be described together with its apparatus 10 with reference to the drawings. As shown in FIG. 1, a table 12 having a horizontal surface is provided. The table 12 is for placing the centered ceramic product W. In addition, the surface of the ceramic product W is designed to reduce frictional resistance so that the ceramic product W can be easily moved on the table 12 by the horizontal pressing action so that the centering can be smoothly performed. There is.

A rotary shaft 14 is provided above the table 12, and the rotary shaft 14 is formed so that the diameter of its upper portion is slightly thicker than the diameter of its lower portion and is vertically movable. Three pusher support members 16 are provided at the lower end of the rotary shaft 14, and these three pusher support members 16 are arranged at an angle of 120 degrees with respect to each other when viewed from a plane (FIGS. 7 to 7). 11 (see FIG. 11), one end of each of the three pressing member support members 16 is pivotally attached to the lower end of the rotary shaft 14 via a shaft 18.

Therefore, the pressing member support member 16 is swingably provided via the shaft 18 as shown by the solid line and the dotted line in FIG.

Further, in order to make the pusher support member 16 swingable, as a control means thereof, a sliding means (not shown) is provided in the lower part of the rotary shaft 14 (a portion of the rotary shaft 14 having a small diameter). A sliding member 20 that is slidable in the longitudinal direction of the rotary shaft 14 is provided.

Both sides of the connecting member 22 are pivotally attached to the other ends of the sliding member 20 and the pressing member supporting member 16 via shafts 24. Therefore, when the sliding member 20 slides in the vertical direction, the three pressing member support members 16 are opened and closed via the connecting members 22 as if they were umbrella bones.

At the other end of each pressing member support member 16, preferably one spherical pressing member 26 is mounted. Although the pusher 26 in this embodiment is of a non-rolling type, it is a roll like the other embodiment described later.
It may be in the form of rolling like a la. Pusher 2
Reference numeral 6 is to be brought into contact with the inner peripheral surface Q of the ceramic product W at the time of centering, and the surface of the presser 26 is the inner peripheral surface Q of the ceramic product W.
It is formed smoothly so as not to scratch it.

Therefore, the pusher support member 16 provided with the pusher 26 at the other end oscillates horizontally from the state of being vertically positioned along the rotary shaft 14 as the sliding member 20 descends. It is displaced on a concentric circle centered on the axis of the rotating shaft 14 as if the inverted umbrella frame was opened.

Therefore, the procedure for centering the ceramic product W in this embodiment will be described below. First, the ceramic product W is placed on the table 12. At this time, since the ceramic product W is randomly placed on the table 12,
The center Pw of the ceramic product W and the axis Pm of the rotary shaft 14 do not match.

Next, the rotary shaft 14 is lowered toward the inner side of the ceramic product W. At this time, the support member 16 for the pusher is folded upward along the sliding member 20 via the shaft 18. Therefore, the pusher 26 follows the swing of the pusher support member 16 and is positioned near the sliding member 20 (see FIG. 2).

When the lower end of the rotary shaft 14 reaches near the inner bottom of the ceramic product W, the lowering of the rotary shaft 14 is stopped and the rotary shaft 14 is rotated (see FIG. 3).

Thus, the pressing member support member 16 that has been folded in the vertical direction waits for the rotational force of the rotating shaft 14 and the centrifugal force acting on the pressing member 26, as shown in FIG. Is displaced in the horizontal direction as indicated by the solid line.

The pusher support member 16 is gradually rotated with the rotation of the rotary shaft 14, and the pusher 26 provided on the pusher support member 16 is rotated with the rotation of the pusher support member 16. Gradually displace on a concentric circle centered on the axis Pm (see Fig. 8)

As the pusher 26 continues to be displaced, the pusher 26 comes into contact with the inner peripheral surface Q of the ceramic product W, but there is only one place where the pusher 26 comes in contact (FIGS. 4 and 9).
See).

When the pressing element 26 is further displaced, the pressing element 26 presses the inner peripheral surface Q of the ceramic product W, and the ceramic product W receives the action of the pressing force of the pressing element 26 to make the table. 12 is gradually moved in the pressing direction.

Thus, the distance between the other two pressers 26, which are separated from the inner peripheral surface Q of the ceramic product W, is gradually narrowed, and finally the center Pw of the ceramic product W and the axis of the rotary shaft 14 are made. The other pressing element 26 that has been released when the core Pm coincides also comes into contact with the inner peripheral surface Q of the ceramic product W.

The movement of the ceramic product W by the presser 26 is
It is performed until all the pressers 26 contact the inner peripheral surface Q of the ceramic product W, and when the pressers 26 contact all the inner peripheral surfaces Q, the center Pw of the ceramic product W and the axis Pm of the rotating shaft 14 are They match, and centering is completed (see FIGS. 5 and 10).

When the centering of the ceramic product W is completed, the sliding member 20 moves up by the operation of the sliding means of the sliding member 20, so that the pusher 26 returns to the vicinity of the rotary shaft 14 (FIG. 1).
See 1). Next, the rotary shaft 14 is lifted to separate the rotary shaft 14 from the inside of the ceramic product W (see FIG. 6).

Next, another embodiment of the invention will be described with reference to FIGS. The centering method and the apparatus 30 thereof according to this embodiment are provided on a conveyer provided with a large number of tables 40, and are different from the above-described embodiments in the form of a presser, and are freely rotatable. In addition to adopting 70, a movable table 40 is adopted so that the table 40 and the ceramic product W are integrally moved by pressing the pressing element 70.

Then, the mounting position A and the centering position B of the ceramic product W are set from the upstream side to the downstream side of the table 40 on which the ceramic product W for centering intended by the present invention is placed. The finishing position C and the product take-out position D are sequentially set (see FIGS. 12 and 13).

A pair of endless drive chains 3 are mounted on the machine base 32.
4, 34, and the drive chains 34, 34 are machine bases 3.
It is circularly driven by a drive motor 36 provided in No. 2 (see FIGS. 12 and 13).

In order to support a large number of tables 40, which will be described later, a plate-shaped table support 38 is provided between the pair of drive chains 34, 34 via a fixing member 37. A large number of suspensions (see FIGS. 14 and 15).
See). Therefore, the table 40 is cyclically driven together with the table support 38 by the cyclic drive of the drive chains 34, 34.

The details of the control mechanism of the table 40 will be described later, but the table 40 is supported on the table support 38 and the ceramic product W is placed thereon.

Below the center of the table support 38,
A guide rail 42 extends along the longitudinal direction of the machine base 32.

On the other hand, a pair of guide rollers 44, 44 which are rotatable so as to sandwich both sides of the guide rail 42 are attached to the lower surface of the table support 38 via fixing members 46, 46. There is.

Thus, the circulation drive of the table support 38 is restricted by the pair of rotatable guide rollers 44, 44, and can be performed while being guided by the guide rail 42. It is possible to prevent delusion in the direction.

In this embodiment, one table support 38 is provided with four through holes 48 at appropriate intervals (see FIGS. 13 and 14). On the other hand, four table guide shafts 50 are provided on the lower surface of the table 40 so as to correspond to the above-mentioned four through holes 48, and these table guide shafts 50 have respective through holes. It is vertically provided so as to face the inside of 48.

In preparation for centering the ceramic product W, the table 40, which is intended to be placed on the ceramic product W for horizontal movement, is designed to be freely movable on the table support 38 so as to be excessively moved. In order to suppress the above, the diameter of the table guide shaft 50 is set smaller than the diameter of the through hole 48 formed in the table support 38.

In the embodiment of the present invention, the diameter of the table guide shaft 50 is set to 1/2 of the diameter of the through hole 48 described above. Therefore, in the embodiment, the table 4 is used.
0 can move a distance corresponding to a maximum of 1/2 of the diameter of the through hole 48, and is designed so that the table 40 does not excessively move and fall off the table support 38.

Further, when the table 40 is moved, the table 4 is moved.
For the purpose of facilitating the movement of 0, the table 40 is configured to be released from the table support 38 so as to eliminate the frictional resistance between the table 40 and the table support 38. The table 40 is placed on the table support 38 in a free state except that it is controlled by the table guide shaft 50.

When the ceramic product W is centered, it is moved within the range of the diameter of the through hole 48 of the table 40. When the center is finished, the table 40 is raised, and when the centering is completed, the table 40 is moved. In order to be able to descend onto the table support 38, the table is placed below the table support 38 near the longitudinal center of the machine base 32, specifically, at the centering position B of the ceramic product W. A bull lifting mechanism 52 is provided.

The table lifting mechanism 52 includes an air cylinder 54 which is a lifting means, a rod 56 supported by the air cylinder 54, a support plate 58 provided on the table 40 side of the rod 56, and a support plate 58. A holding member 62 for the plurality of sliders 60 provided on the table 40 side, a holding member 62
The slider 60 and the like are rotatably accommodated therein and are exposed and held in the vicinity of the top from the holding member 62.

The plurality of sliders 60 held by the holding member 62 are provided at regular intervals. The number and position of the sliders are four tables protruding from the lower surface of the table 40. Corresponding to the bull guide shaft 50.

Thus, as the rod 56 of the table raising / lowering mechanism 52 moves up and down, the plurality of sliders 60 held by the holding member 62 follow the raising and lowering action of the rod 56 and move the table guide shaft 50. Move up and down.

Therefore, the slider 60 is raised and the tape
The table 40 can be detached from the table support 38 and raised by abutting against the table 40, or the table 40 in the raised state can be moved by lowering the slider 60. -Can be lowered onto the bull support 38.

In this embodiment, further ingenuity is made in order to ensure the raising and lowering action of the table 40.
As described above, since the table 40 is provided so as to be movable in the horizontal direction, the table guide shaft 50 attached to the lower surface of the table 40 also follows the movement of the table 40 and the through hole. Although restricted to a diameter range of 48, it moves.

Therefore, when the slider 60 of the table raising / lowering mechanism 52 moves up and down, the slider 60 and the table guide shaft 50 are moved.
As a result of the case where
In some cases, the table 40 cannot be moved up and down even if the table lifting mechanism 52 is driven.

Therefore, the table guide shaft 50 is inserted into the through hole 48.
In order to make sure that the slider 60 that moves up and down is brought into contact with the slider 60 even if it moves in the horizontal direction, a plate having an area that is approximately the same as or slightly larger than the diameter of the through hole 48 is provided on the slider 60 side of the table guide shaft 50. By providing the contact plate 64 in a horizontal shape in the horizontal direction, flexibility is achieved.

By providing the abutment plate 64 on the slider 60 side of the table guide shaft 50, the table guide shaft 50 moves in the horizontal direction, and the axis center thereof deviates from the center of the through hole 48. Also the slider 60 that moves up and down as the rod 56 moves up and down.
Since it can be reliably brought into contact with the lower surface of the contact plate 64, the table 40 can be made to follow up and down movement of the slider 60 with the table support 38 interposed.

While the slider 60 is rotatably provided on the holding member 62, the table 40 is mounted on the slider 60 via the table guide shaft 50, so that the table 40 slides. Since the child 60 can be smoothly moved under the influence of force, the ceramic product W placed on the table 40 can be smoothly centered.

However, as described above, the table 4
The moving distance of 0 is restricted within the range of the diameter of the through hole 48 provided in the table support 38. In this embodiment, the moving distance of the table 40 is 1 / the diameter of the through hole 48.
2 or less, and the table guide shaft 50 provided in the table 40 has a through hole 48 provided in the table support 38.
The movement of the table 40 is controlled and the movement of the table 40 is suppressed.

On the other hand, the table 40 at the centering position B
A rotary shaft 66 that can be raised and lowered is provided above the above. Further, at the lower end of the rotating shaft 66, three pressing member support members 68 are arranged at an angle of 120 degrees with respect to each other.

One end of the pressing member support member 68 has a rotary shaft 66.
Since the pusher support member 68 is pivotally attached to the lower end of the pusher, the other end of the pusher support member 68 is
By the swinging of the pressing member support member 68, the pressing member support member 68 is displaced on a concentric circle centered on the axis Pm of the rotating shaft 66.

Further, the pressing member support member 68 is supported by the rotary shaft 66 via a coil spring 72 so as to be located near the rotary shaft 66 in the normal state.

Therefore, the rotation of the rotating shaft 66 causes the other ends of the pressing member supporting members 68 to swing horizontally in the three pressing member supporting members 68, centering on the axis Pm of the rotating shaft 66. It is displaced on a concentric circle.

Then, the pusher 70 is rotatable in the horizontal direction.
Is attached to the other end of the pressing member support member 68. Thus, the pusher 68 is displacement-controlled on the concentric circle of the axis Pm of the rotary shaft 66 as the pusher support member 68 swings due to the rotation of the rotary shaft 66.

Furthermore, three pushers 70 provided on the pusher support member 68 are also provided equidistantly from the axis Pm of the rotating shaft 66. In this embodiment, three pushers are provided. The 70 are designed to maintain an angle of 120 degrees with each other.

The pushers 70 of this embodiment receive the centrifugal force produced by the rotation of the rotary shaft 66 together with the pusher support member 68, and are displaced away from the axis Pm of the rotary shaft 66.

Further, the rotation of the rotary shaft 66 is stopped after the product W is centered. At this time, the pressing element 70 is returned to its original position by the coil spring 72 as an urging means.
Both ends of the coil spring 72 are hooked on the rotary shaft 66 and the pressing member support member 68.

Next, the procedure for centering the ceramic product W by the centering device 30 for the ceramic product according to this embodiment will be described. Here, the porcelain product W to be described is a pot-shaped molded product after drying and is not yet subjected to finishing treatment, and the inner peripheral surface Q of the product W is circular, but the outer peripheral surface R
Is an example of a non-circular shape.

First, at the placement position A of the device 30, the ceramic product W is placed on the table 40 substantially at the center. In this case, the center Pw of the ceramic product W is the rotary shaft 66.
The center of the table 40 and the center of the machine base 32 coincide with each other when the apparatus 30 is viewed from the front (see FIG. 16).

Table 40 on which the ceramic product W is placed
Is driven by the drive chain 34.
When it is conveyed to the centering position B following the traveling of the table support body 38 supported by the above, it is stopped.

After the table 40 reaches the centering position B and stops traveling, the rotary shaft 6 provided above the device 30.
6 inside the ceramic product W on the table 40 (near the inner bottom)
Let it descend.

Next, the air cylinder 54 of the lifting mechanism 52.
Is operated to move the slider 60 held by the holding member 62 with the rise of the rod 56 so that the table support 38
Raise to the side (see Figure 14).

By further raising the slider 60,
The slider 60 reaches an abutment plate 64 on the slider 60 side of the table guide shaft 50 provided on the lower surface of the table 40, and the slider 60 subsequently raises the abutment plate 64 to cause the table to move. −
The bull 40 is released from the table support 38 and slightly floats.

In this case, the table 40 is held in a state of being supported on the rotatable slider 60 via the contact plate 64. Therefore, the table 40 is set to be movable in the horizontal direction.

Next, the rotary shaft 66 is rotated, and the three pusher support members 68 provided on the rotary shaft 66 and the pusher 70 provided at the other end generate centrifugal force associated with the rotation of the rotary shaft 66. Receive and change each.

The displaced pusher 70 is located equidistant from the axis Pm of the rotary shaft 66, and is pressed against the inner peripheral surface Q of the ceramic product W closest to the axis Pm of the rotary shaft 66. 70 presses while abutting.

In this case, the three pushers 70 are the same as the rotary shaft 6
6 is displaced concentrically with the axis Pm of 6, but the rotary shaft 6
It is continuously displaced by the rotation of 6. Therefore, the inner peripheral surface Q of the ceramic product W with which each presser 70 is in contact is
The pressing force acts according to the displacement of the table, and as a result, the ceramic product W moves in the horizontal direction together with the table 40.

At this time, the pusher 70 rotates around the rotary shaft 66 about the axis Pm of the rotary shaft 66, and the pusher 7 is rotated.
0 presses against the inner peripheral surface Q of the ceramic product W so that the center Pw of the ceramic product W coincides with the axis Pm of the rotating shaft 66. By pressing the pusher 70, the ceramic product W
Is horizontally moved so that its center Pw coincides with the axis Pm of the rotation shaft 66, and finally Pw and Pm coincide with each other. At this time, the centering of the ceramic product W is completed.

The pusher 70 is the pusher support member 68.
Since it is rotatably provided, the inner peripheral surface Q of the ceramic product W with which the presser 70 abuts is not damaged. Further, when the ceramic product W is pressed by the pressing element 70, the frictional force between the ceramic product W and the table 40 is reduced by the table.
It goes without saying that the frictional force is greater than the frictional force between the bull 40 and the slider 60.

When the center Pw of the ceramic product W coincides with the axis Pm of the rotary shaft 66, the rotation of the rotary shaft 66 is stopped, and the pressing element 70 returns to its original position by the restoring force of the coil spring 72.

Further, since the air cylinder 54 of the lifting mechanism 52 is released and the rod 56 of the air cylinder 54 descends, the table 40 is moved to the center Pw of the ceramic product W and the rotary shaft 6.
The shaft center Pm of 6 descends while maintaining the same state, and is placed on the table support 38.

After the table 40 is placed on the table support 38, the rotary shaft 66 is raised, and after the rotary shaft 66 is raised, the table support 38 runs and the ceramic product W is finished at the finishing position C. And the ceramic product W is finished. Next, the finished product W is conveyed to the product unloading position D and is taken out from the table 40 by an appropriate moving means.

On the other hand, at the centering position B, the next ceramic product W
Are sent together with the table 40, and the ceramic product W is centered according to the above-mentioned procedure.

In this embodiment, the table 40 is used.
The table guide shaft 50 and the contact plate 64 on the lower surface of the
Although the form in which the slider 60 is brought into contact with the contact plate 64 has been described, the slider 60 may be directly brought into contact with the lower surface of the table 40, and the slider 60 is also restricted to a ball shape. Instead, it is sufficient if it has the function of supporting the table 40 and the function of reducing the frictional resistance with the table 40.

Although it is desirable that the number of pressing elements 70 is at least three, it may be four or more.

Next, still another embodiment will be described with reference to FIG. Centering device 80 according to this embodiment
The table 82 is rotatably provided in the same direction as the rotation direction of the rotary shaft 14. A table 82 is rotatably provided on the machine base 84, a drive shaft 86 is provided downward on the table 82, and a pulley 88 is attached near the lower end of the drive shaft 86. .

On the other hand, a drive belt (not shown) such as a motor for rotating the table 82 and a transmission belt 90 are hung on the pulley 88, and the rotational force from the drive means is transmitted to the transmission belt 9.
A structure in which the data is transmitted to the table 82 through 0 is adopted. The axis Pt of the drive shaft 86 is aligned with the extension of the axis Pm of the rotary shaft 14.

Since the structure and operation of the control means of the presser provided on the rotary shaft 14 such as the presser support member 16 and the presser 26 are the same as those of the above-described embodiment, the structure thereof is the same. Description is omitted and incorporated.

In this embodiment, when centering the ceramic product W, the table 82 is rotated in the same direction as the rotation direction of the rotary shaft 14 as the rotary shaft 14 is rotated.

On the other hand, the pusher 26 displaced along with the rotation of the rotary shaft 14 revolves around the rotary shaft 14 by the rotation of the rotary shaft 14.

Since the ceramic product W on the table 82 also rotates in the same direction as the rotating shaft 14, the presser 26 rotates the rotating shaft 14, so that the ceramic product W of the presser 26 is not rotated. The state of contact with the peripheral surface Q is the ceramic product W
And the rotation of the rotary shaft 14 are offset from each other.

For example, the rotation of the table 82 and the rotary shaft 1
If the rotations of 4 are the same, the state in which the presser 26 abuts on the inner peripheral surface Q of the ceramic product W is the same as the state in which they abut on each other in a stationary state. Therefore, if the difference in rotation between the rotating shaft 14 and the ceramic product W is smaller, the ceramic product WW has a smaller pressing element 2.
Impact from 6 is reduced.

In this embodiment, the rotation of the table 82 and the rotation of the rotary shaft 14 are set to be substantially the same, and the ceramic product W is
The impact on the ceramic product W is suppressed and damage to the ceramic product W is prevented.

Needless to say, the impact on the ceramic product W can be further eliminated by adopting the rolling pusher 70 as in the previous embodiment.

Also, in the previous embodiment, the table 40 provided on the conveyor is rotatable as in this embodiment, and can be moved up and down to the machine base below the table 40 at the centering position B. The inventor also plans to provide a different drive shaft.

In this case, although the table is conveyed by driving the chain, it does not move in the horizontal direction at the time of centering, but is rotatable and movable up and down with respect to the table support. Through hole, table guide shaft, support plate,
Do not use sliders.

Therefore, when the centering is performed, the drive shaft is raised and fitted into the table to raise the table, and when the centering is completed, the drive shaft is lowered to be separated from the table. The table is placed on a table support, after which the table is transported.

[Brief description of drawings]

FIG. 1 is a front view of a centering device for ceramic products according to an embodiment of the present invention.

FIG. 2 is a front view showing the time when the rotary shaft of the centering device for the ceramic product according to the embodiment of the present invention is lowered.

FIG. 3 is a front view showing the rotation axis of the centering device for a ceramic product according to the embodiment of the present invention and the start of displacement of the pressing member support member including the pressing member.

FIG. 4 is a front view showing the centering device of the ceramic product according to the embodiment of the present invention during centering.

FIG. 5 is a front view showing the completion of centering of the centering device for ceramic products according to the embodiment of the present invention.

FIG. 6 is a front view showing the time when the centering device for the ceramic product according to the embodiment of the present invention completes the centering and then returns the pressing member support member including the pressing member to the original position and raises the rotating shaft. Is.

FIG. 7 is a plan view showing the time when the rotary shaft is descending in the procedure of centering the ceramic product according to the embodiment of the present invention.

FIG. 8 is a plan view showing the rotation state of the rotary shaft and the displacement state of the presser support member including the presser in the centering procedure of the ceramic product according to the embodiment of the present invention.

FIG. 9 is a plan view showing the start of centering of the ceramic product in the procedure of centering the ceramic product according to the embodiment of the present invention.

FIG. 10 is a plan view showing the completion of centering of the ceramic product in the procedure of centering the ceramic product according to the embodiment of the present invention.

FIG. 11 is a process of centering a ceramic product according to an embodiment of the present invention, in which the displacement of the presser support member provided with the presser is returned to the original state after the completion of the centering of the ceramic product,
It is a top view which shows the state which raises a rotating shaft.

FIG. 12 is a side view of a centering device for a ceramic product according to another embodiment.

FIG. 13 is a plan view of a centering device for ceramic products according to another embodiment.

FIG. 14 is a front view showing a main part of a centering device for a ceramic product according to another embodiment.

FIG. 15 is a perspective view showing a main part of a centering device for a ceramic product according to another embodiment.

FIG. 16 is a plan view showing when the rotating shaft is descending in the procedure of centering a ceramic product according to another embodiment.

FIG. 17 is a plan view showing a procedure of centering a ceramic product according to another embodiment when the rotary shaft is rotated and when the table lifting mechanism is raised.

FIG. 18 is a plan view showing the start of centering of the ceramic product in the procedure of centering the ceramic product according to another embodiment.

FIG. 19 is a plan view showing the completion of centering of the ceramic product in the procedure of centering the ceramic product according to another embodiment.

FIG. 20 is a plan view illustrating a procedure of centering a ceramic product according to another embodiment when the rotation of the rotary shaft is stopped after the centering of the ceramic product is completed and when the table lifting mechanism is lowered. .

FIG. 21 is a front view of a ceramic product centering device according to still another embodiment.

[Explanation of symbols]

10 Centering equipment for ceramic products 12 tables 14 rotation axis 16 Support member for pusher 18 axes 20 Sliding member 22 Connection member 24 axes 26 Presser 30 Ceramic product centering device 32 units 34 drive chain 36 drive motor 37 fixing member 38-table support 40 tables 42 Guide rail 44 induction roller 46 Fixture 48 through holes 50-table induction shaft 52-table lifting mechanism 54 Air cylinder 56 rod 58 Base plate 60 Slider 62 holding member 64 Contact plate 66 rotation axis 68 Support member for pusher 70 Presser 72 coil spring 80 Ceramic Product Centering Device 82 tables 84 units 86 drive shaft W ceramic products A Placement of ceramic products B Ceramic product centering position C Finishing position of ceramic products D Product removal position of ceramic products Pm axis of rotary shaft Pw The center of ceramic products Pt drive shaft axis Q Inner surface of ceramic products R Peripheral surface of ceramic products

Claims (6)

(57) [Claims] 1. A method for centering a ceramic product having a circular inner peripheral surface, wherein a table for mounting the ceramic product is provided, and a rotatable shaft is vertically provided above the table. At least three pushers are provided at one end of the rotary shaft, and these pushers are displaceably controlled on a concentric circle centering on the axis of the rotary shaft, and the ceramic product is placed on the table. After that, the rotary shaft is lowered toward the inside of the ceramic product, the rotary shaft is rotated, and the pusher is displaced on a concentric circle centered on the axis of the rotary shaft, and the displaced pusher is moved to the ceramic product. It is possible to move the ceramic product on the table by pressing it against the inner peripheral surface of the ceramic product and pressing the inner peripheral surface of the ceramic product with a pressing element to align the axis of the rotary shaft with the center of the ceramic product. Characterizing method for centering ceramic products. 2. The centering of a ceramic product according to claim 1, wherein the presser is brought into contact with the inner peripheral surface of the ceramic product while rotating the table in the same direction as the rotation direction of the rotary shaft. Method. 3. A table on which a ceramic product is placed is provided, and a rotatable shaft that can be raised and lowered is provided above the table, and one end of at least three pressing member support members is axially attached to the rotary shaft. On the other hand, each presser is provided at the other end of the presser support member, and the presser support member is swingably provided with respect to the rotary shaft, so that the presser is a shaft of the rotary shaft. A centering device for a ceramic product, which is controlled so as to be displaceable on a concentric circle centered on the core. 4. The centering device for a ceramic product according to claim 3, wherein the pusher is rotatable. 5. The centering device for a ceramic product according to claim 3, wherein the table is movable in the horizontal direction. 6. The centering device for a ceramic product according to claim 3, wherein the table is rotatable in the same direction as the rotation direction of the rotary shaft.