JP2668622B2 - Method and device for attaching and detaching a trowel of a ceramic molding machine - 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 attaching and detaching a trowel of a ceramic molding machine.

[0002]

2. Description of the Related Art Conventionally, in pottery molding by potter's wheel molding, the clay placed on a gypsum mold on a potter's wheel shaft of a pottery molding machine is rotated by a rotating action of a trowel attached to a rotating shaft of the pottery molding machine. The plates are rolled by the rotating action of to form plates or cups.

It is necessary to replace the trowel due to the change of the type of the ceramic product to be molded or the wear of the trowel, and it is often the case that the trowel is replaced every day depending on the type of the product.

The trowel of a ceramic molding machine is usually attached to a rotary shaft by a bolt, and the work of replacing the trowel has been carried out manually.

Therefore, in the prior art, there is a problem that a large amount of time and labor is required for manipulating the trowel to replace it.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional technical drawbacks, and to simplify the work of replacing the trowel and shorten the replacement time. is there.

[0007]

In order to achieve the object of the present invention, the present invention relates to a method of attaching and detaching a trowel in a ceramics molding machine, which comprises a lower portion of a rotary shaft and a trowel holding member provided below the rotary shaft. High pressure air is fed into the air chamber between them through a ventilation passage provided on the rotary shaft to attach the trowel to the trowel holding member, while the air chamber is set to atmospheric pressure or the air chamber is set to a negative pressure. The invention performed by removing the trowel holding member from the trowel holding member, in a ceramic molding machine equipped with a rotating shaft, a trowel holding member that is vertically slidable is provided at the lower part of the rotating shaft, and the lower part of the rotating shaft and the trowel holding member In an invention in which one end of a ventilation path provided on a rotary shaft is faced to an air chamber provided between, and a ceramic molding machine equipped with the rotary shaft, a trowel holding slidable vertically below the rotary shaft A member is provided, and an empty space provided between the lower part of the rotating shaft and the trowel holding member. One end of the vent passage provided in the rotary shaft is to face the chamber, pushing up the control mechanism for pressing the trowel holding member toward the iron holding member from the lower portion of the rotary shaft is an invention is provided.

[0008]

Function: The air chamber is maintained at a high pressure from the air supply source through the ventilation path. Thus, the iron holding member that slides up and down slightly rises while maintaining the air chamber at a high pressure slightly with the iron held below, and the iron is always fixed to the iron holding member.

On the other hand, when the air pressure in the air chamber is reduced to a negative pressure, the iron holding member is lowered by its own weight together with the iron, so that a margin is created between the iron and the iron holding member, and the connection is released. , The trowel can be freely removed from the trowel holding member.

When a push-up control mechanism is provided,
Even if the air chamber becomes equal to the atmospheric pressure, the trowel holding member is constantly pressed upward by the operation of the push-up control mechanism instead of the high pressure air, so that the trowel does not drop from the trowel holding member.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to FIGS.

An embodiment of the method will be described together with an embodiment of the apparatus. A support base 12 for mainly supporting a gypsum mold (not shown) constituting the ceramic forming machine 10 is provided below, and above the support base 12 is an iron attaching / detaching device 14 for a ceramic forming machine which is a constituent part of the present invention described later. A base 16 is provided for mounting the.

The structure of the trowel attaching / detaching device 14 is roughly divided into the trowel 1
The rotating mechanism for rotating 8 and the trowel 18 are slightly different from those of the base 16 in accordance with the difference in the type of molded product, its size, and the like.
The angle adjusting mechanism that allows the trowel 18 to be tilted outward with respect to the rotator, the trowel attaching / detaching mechanism that allows the trowel 18 to be easily attached and detached under the rotating mechanism, and the safety of the trowel attaching / detaching mechanism. The push-up control mechanism 11 presses the iron holding member 22 toward the iron holding member 22 from below.

Therefore, first, a rotating mechanism for rotating the iron 18 will be described. As is clear from FIG. 2,
A rotary shaft 20 for rotating the trowel 18 is provided in the vertical direction. In addition, the iron holding member 22 for replacing the iron 18 and attaching / detaching the iron 18 is attached to the lower part of the rotating shaft 20.
The control mechanism of the iron holding member 22 will also be described.

At the lower part of the rotary shaft 20, there is provided a flange portion 24 that expands outward, and a step portion 26 having an L-shaped cross section is formed near the axis of the flange portion 24 on the surface side. ing.

The ventilation passages 28 are provided on both sides of the axis of the rotary shaft 20 in the vertical direction for allowing air to flow in the direction of the axis of the rotary shaft 20, although they are shown only on the right side in the drawing.

The air passage 28 extends in the collar portion 24 provided at the lower portion of the rotary shaft 20 described above at right angles to the vertical air passage 28 in the rotary shaft 20, and the extended end thereof is the above-mentioned. It faces the step 26 of the formed flange 24. In the drawing, only two horizontal air passages 28 of the collar portion 24 are shown on both sides of the collar portion 24, but it is free to provide three or more radial passages 28.

Therefore, the high-pressure air supplied from the air supply source (not shown) through the air supply unit 30 passes through the vertical air passage 28 in the rotary shaft 20, and further in the collar unit 24. Through the horizontal air passage 28, the collar portion 24
The air in the air chamber 32 on the side of the step portion 26 is supplied to the air chamber 32 described later toward the outside of the step portion 26, and the air pressure in the air chamber 32 is made negative through the air passage 28. Therefore, it is configured so that suction can be performed.

A drive motor 34 is provided beside the rotating shaft 20 as is generally known for rotating the rotating shaft 20. The drive shaft 36 provided below the drive motor 34 faces the inside of the pulley storage box 38,
A pulley 42 is attached to the drive shaft 32 via the.

On the other hand, another pulley 44 is mounted around the rotary shaft 20 on the same horizontal line as the pulley 42 of the drive motor 34, and details thereof will be omitted, but as is generally known, both pulleys 44 are mounted. Belt 46 between pulleys 42 and 44
, And a structure capable of transmitting the torque of the drive motor 34 to the rotating shaft 20 is adopted.

Thus, as the rotary shaft 20 rotates, the trowel 18 mounted on the trowel holding member 22, which will be described in detail later, rotates.

Next, an angle adjusting mechanism for allowing the trowel 18 to be tilted to the outside of the base 16 in response to a slight difference in the type and size of the molded product will be described. Since the angle adjusting mechanism of the trowel 18 has a general structure known in this type of industrial field, details thereof will be omitted and a general structure will be described.

As is known, in the lathe molding of a ceramic product, the trowel 18 is not positioned horizontally, but as described above, it is slightly inclined and rotated with respect to the base 16 toward the outside. To be done.

In this case, in this example, the iron attachment / detachment device 14 including the drive motor 30, the rotary shaft 20, the iron holding member 22, and the like.
Is a structure in which the whole is inclined.

The lower part of the pulley storage box 38 and the above-mentioned flange 2
An angle adjustment rod holder 50 is provided around the rotation shaft 20 between the first and second rotation shafts 4 via a packing 48 in the vertical position.

A pair of support arms 52 are provided on both sides of the angle adjusting rod holding body 50 so as to sandwich the angle adjusting rod holding body 50 from both sides.

In order to allow the trowel attaching / detaching device 14 to be slightly tilted in the direction perpendicular to the rotating shaft 20 at the upper and lower positions of the pair of support arms 52, one set of angle control rods 54 is provided on each side. Has been.

Each of the angle control rods 54 penetrates the support arm 52 and further penetrates the above-mentioned angle control rod holder 50 so as to face the rotation shaft 20. Not in. An engaging piece 56 is provided by connecting the outer ends of the angle control rods 54 on one side of the two sets of angle control rods 54 (see FIG. 3).

The angle control rod 5 on the pulley storage box 38 side
The supporting groove 58 for supporting the iron 4 is formed as a free groove with a margin corresponding to a slight tilting action of the iron attaching / detaching device 14.

By controlling a control knob 60 provided on the base 16 side of the support arm 52 in FIG.
The trowel attaching / detaching device 14 is inclined with the angle control rod 54 on the side of the trowel holding member 22 as a fulcrum, is freely inclined within the range of the support groove 58 described above, and is shown in FIG. 2 when a constant inclination angle is set. As described above, the angle is fixedly controlled by operating the handle 62.

Thus, the trowel attaching / detaching device 14 has a function of bringing the trowel 18 into an inclined state necessary for potter's wheel molding. The angle adjusting mechanism of the trowel 18 is as described above.

Next, a description will be given of an iron attachment / detachment mechanism for enabling the iron 18 to be easily attached / detached below the rotating mechanism to be solved by the present invention, a push-up control mechanism 11 also serving as a safety of the iron attachment / detachment mechanism, etc. To do.

A bowl-shaped trowel holding member 22 having a large empty space at the center is attached from the outside of the stepped portion 26 of the collar portion 24 provided below the rotary shaft 20 to the lower portion of the collar portion 24.

In this case, an air chamber 32 is provided between the outer side of the stepped portion 26 of the collar portion 24 and the outer end of the collar portion 24 so as to form a hermetically sealed air chamber 32. It will be understood that the air chamber 32 can be easily formed by reducing the wall thickness of the trowel holding member 22 on the stepped portion 26 side as compared with the height of the stepped portion 26 of the collar portion 24. .

It goes without saying that the air chamber 32, the vertical air passage 28 provided in the rotary shaft 20, and the horizontal air passage 28 are communicated with each other.

On the outer peripheral edge below the iron holding member 22, the iron 18
A bulged portion 64 having an inverted U-shape in cross section and having a concave portion on the inside is formed in order to attach the.

The bulging portion 64 is connected to the iron holding member 22.
Is provided on most of the outer peripheral edge below the bulging portion 6.
Notches 66 are provided at regular intervals on the lower edge of 4. (See FIG. 2).

On the other hand, the upper outer edge of the trowel 18 does not correspond to the bulging portion 64 of the trowel holding member 22 and is slightly smaller than the size of the void inside the bulging portion 64. The convex portions 68 are provided at regular intervals. Also, the convex portion 6
A notch 69 is provided adjacent to 8 (see FIG. 4). Since the convex portion 68 is smaller than the void inside the bulging portion 64, the trowel 18 and the trowel holding member 22 slide vertically with respect to each other by the difference.

In the projection 68, a stepped portion having an L-shaped cross section is formed on an outer edge above the iron 18 in the drawing, and an annular metal wider than the stepped portion is attached to the stepped portion via a screw 71. However, providing the convex portion 68 integrally with the iron 18 is merely a matter of production technology.

The basic structure for solving the problems of the present invention is as described above, but the present invention further devises the push-up control mechanism 11 which also serves as the safety of the trowel attaching / detaching mechanism of the trowel 18. This point will also be mentioned.

Therefore, prior to explaining the push-up control mechanism 11 which also serves as the safety of the trowel attachment / detachment mechanism, in order to understand the technical significance of the push-up control mechanism 11, the above-mentioned trowel 18 is used.
The basic operation of the trowel attaching / detaching mechanism will be described.

When the iron 18 is mounted on the iron holding member 22. The convex portion 68 provided on the trowel 18 is positioned in the notch 66 formed at the lower edge of the trowel holding member 22, and the trowel 18 is raised and then rotated to move the convex portion 68 to the lower side of the trowel holding member 22. It fits in the space inside the bulging portion 64 provided at the edge. In this case, as described above, the convex portion 68 of the iron 18 is provided.
Is smaller than the void inside the bulging portion 64 of the trowel holding member 22, the trowel 18 is slightly slid vertically inside the bulging portion 64 of the trowel holding member 22, and the trowel is still present. 18 is not attached to the trowel holding member 22.

Therefore, it is necessary to securely mount the iron 18 on the iron holding member 22. In the present invention, when the iron 18 is mounted on the iron holding member 22, air pressure is used without fixing the iron 18 with screws or the like. First, high-pressure air from an air supply source passes through a vertical air passage 28 in the rotary shaft 20 and further in a horizontal air passage 2 provided in the collar portion 24.
It is supplied via 8 to the air chamber 32 forming a closed state.

Since the high-pressure air filled in the air chamber 32 is not exhausted, the air pressure is
The flange portion 24 of the rotary shaft 20 covering the shaft 2 and the iron holding member 22 located outside the flange portion 24 are pressed.

However, since the collar portion 24 is fixed, there is no room for movement. On the other hand, as described above, the size of the hollow inside the bulging portion 64 is
Since it is larger than the size of the projection 68 of FIG. 8, there is room for slight sliding in the vertical direction. Accordingly, the air pressure acts exclusively on the iron holding member 22 which is mounted on the flange portion 24 and has room to slide in the vertical direction, and thus has an effect of pushing the iron holding member 22 upward. .

Thus, the iron holding member 22 slightly rises, and the iron 18 fitted via the bulging portion 64 of the iron holding member 22 slightly rises following the rise of the iron holding member 22. As long as high-pressure air is supplied, trowel 1
8 is securely attached to the trowel holding member 22. By rotating the rotary shaft 22 in this state to rotate the iron 18, the potter's wheel can be formed.

When the iron 18 is detached from the iron holding member 22. The air filled in the air chamber 32 is sucked, and the inside of the air chamber 32 is made to have a negative pressure, as opposed to when the iron 18 is mounted. in this case,
Instead of positively sucking air to make the inside of the air chamber 32 have a negative pressure, the atmospheric pressure of the air chamber 32 may simply be made atmospheric pressure.

Thus, the air pressure in the air chamber 32 surely decreases as compared with when the trowel 18 is mounted, so the trowel holding member 22 which has been slightly elevated is slightly lowered due to its own weight.

Then, the iron 18 suspended via the bulging portion 64 of the iron holding member 22 also descends.

Since the protrusion 68 of the iron 18 suspended on the bulging portion 64 of the iron holding member 22 and the inside of the bulging portion 64 are slightly different in size as described above, the iron 18 is Since it freely rotates through the bulging portion 64 of the member 22, by rotating the trowel 18, the convex portion 68 of the trowel 18 is cut out of the trowel holding member 22 as opposed to when the trowel 18 is mounted. At the position 66, the iron 18 is removed from the iron holding member 22.

As described above, the basic operation of the present invention is clear. As long as air is continuously supplied to the air chamber 32 when the trowel 18 is used in the above-described invention, the trowel holding member 22 rotates, but the trowel 18 does not easily fall off from the trowel holding member 22.

However, when it is predicted that the supply of high-pressure air to the air chamber 32 is interrupted due to an unexpected cause when rotating the iron 18, the iron 18 is affected by the centrifugal force exerted by the rotating shaft 20. It cannot be said that there is a risk that the trowel 18 will come off from the trowel holding member 22 as it rotates and the convex portion 68 of the trowel 18 reaches the notch 66 of the trowel holding member 22. Therefore, the present inventor further considers the push-up control mechanism 11 of the trowel attaching / detaching mechanism in order to ensure safety and reliability when the trowel 18 is attached to the trowel holding member 22, and therefore, this point will be referred to.

As is clear from FIGS. 5 and 6,
A rod insertion hole 70 is provided in the longitudinal direction near the outer periphery of the flange portion 24 so as to penetrate the flange portion 24. And rod insertion hole 7
Below 0, a spring storage tube 74 is provided at the upper outer edge of the iron 18 to accommodate the spring 72 of the flange portion 24.

The spring 7 is placed in the spring storage cylinder 74.
2 is mounted, and a rod 78 having a spring support piece 76 is arranged at the upper end of the spring 72. The rod 78 connects the spring support piece 76 to the spring housing cylinder 7.
4, the main portion of the rod 78 passes through the rod insertion hole 70 provided through the flange portion 24, and the upper end thereof is provided on the inner surface of the trowel holding member 22 which faces the rod support hole. It is facing the section 80.

Thus, even if the supply of high-pressure air to the air chamber 32 is interrupted due to an unexpected reason as described above and the iron 18 may fall off the iron holding member 22, even if the push-up control mechanism 11 is provided, Even if the inside of the air chamber 32 is in the same state as the atmospheric pressure, the repulsive force of the spring 72 acts to raise the rod 78.

That is, when high-pressure air is supplied into the air chamber 32, the iron holding member 22 rises by the action of the high-pressure air, as described above, so that the spring 72 naturally extends, and the spring 72 also extends. It also contributes to the lifting action of the trowel holding member 22. Therefore, the trowel 18 is the trowel holding member 22.
Continue to be bound to.

However, as described above, when the supply of the high-pressure air to the air chamber 32 is interrupted due to an unexpected cause, the iron 18 may fall off the iron holding member 22 as described above. Since the spring 72 of 11 extends regardless of interruption of the high pressure air, it still raises the trowel holding member 22 slightly.

Thus, by raising the trowel holding member 22 to raise the push-up control mechanism 11, the space between the flange portion 24 of the rotary shaft 20 and the trowel holding member 22 is expanded.
The iron 18 does not fall off from the iron holding member 22 even if air is not supplied to the air chamber 32. Therefore, even if the supply of high-pressure air is interrupted, there is no possibility that the trowel 18 will fall off from the trowel holding member 22 during the work, and the work safety can be ensured.

When the air pressure in the air chamber 32 is equal to the atmospheric pressure, the iron holding member 22 does not descend by the action of the spring 72 and the rod 78 as described above, and the iron 18 is still tightened by the iron holding member 22. It is in a broken state.

On the other hand, the air chamber 3 is controlled by controlling the air supply source.
By controlling the air pressure inside 2 to a negative pressure, the trowel holding member 22 begins to descend against the spring force of the spring 72. The iron holding member 2 is moved down with the iron holding member 22 descending.
2 while being suspended by the robot 2 (see FIG. 6).

After the lowering is stopped while the trowel 18 is suspended by the trowel holding member 22, the trowel 18 is rotated by a certain distance.
The trowel 18 can be removed from the trowel holding member 22 by positioning the convex portion 68 of the trowel 18 in the notch 66 of the trowel holding member 22.

The present invention has the above-mentioned configuration, and the following configuration shown in the drawings will be described. What is provided on the upper part of the iron 18 is a heating means 82 for heating the iron 18. The circular hole provided in the trowel holding member 22 is a heat dissipation hole 84 (see FIG. 2). What is provided below the iron 18 in FIG.
6. In FIG. 2, the flange 24 of the rotating shaft 20 and the heating means 82 are connected by bolts 88.

[0062]

Since the present invention has the above-described structure, air is supplied from the air supply source to the air chamber, and air is sucked from the air chamber or the air chamber is made equal to the atmospheric pressure. Since the trowel holding member can be easily attached to and removed from the trowel holding member, the work of replacing the trowel can be simplified and the work time can be shortened.

[Brief description of the drawings]

FIG. 1 is a side view of a ceramic forming machine.

FIG. 2 is a front view showing an enlarged cross section of a part of the ceramic molding machine.

FIG. 3 is an enlarged side view of a part of the ceramic forming machine.

FIG. 4 is a perspective view of a trowel of the ceramic forming machine.

FIG. 5 is an operation explanatory view of the present invention, in which a trowel is mounted on a trowel holding member.

FIG. 6 is an operation explanatory view of the present invention, showing a state in which the iron is removed from the iron holding member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Porcelain molding machine 11 Push-up control mechanism 12 Support stand 14 Iron attachment / detachment device 16 Base 18 Iron 20 Rotary shaft 22 Iron holding member 24 Flange 26 Step 26 Air passage 30 Air supply unit 32 Air chamber 34 Drive motor 36 Drive shaft 38 Pulley storage box 40 Metal 42 Pulley 44 Pulley 46 Belt 48 Packing 50 Holder for angle adjustment rod 52 Support arm 54 Angle control rod 56 Engagement piece 58 Support groove 60 Control knob 62 Handle 64 Swelling part 66 Cutting iron holding member Notch 68 Convex part 69 Iron cutout 70 Rod insertion hole 71 Screw 72 Spring 74 Spring storage cylinder 76 Spring support piece 78 Rod 80 Rod support part 82 Heating means 84 Heat radiating hole 86 Clay support 88 Bolt

Claims (3)

(57) [Claims] 1. A method for attaching and detaching a trowel in a ceramic molding machine, wherein high pressure air is sent to an air chamber between a lower portion of a rotary shaft and a trowel holding member provided under the rotary shaft through a ventilation passage provided in the rotary shaft. And the iron is attached to the iron holding member, and on the other hand, the air chamber is set to atmospheric pressure or the air chamber is set to a negative pressure, and the iron is removed from the iron holding member. How to attach and detach trowels. 2. A ceramic molding machine provided with a rotary shaft, wherein a trowel holding member which is vertically slidable is provided at a lower portion of the rotary shaft, and an air chamber provided between the lower portion of the rotary shaft and the trowel holding member. A trowel attaching / detaching device for a ceramics molding machine, characterized in that one end of a ventilation path provided on the rotary shaft is faced with. 3. A ceramic molding machine equipped with a rotary shaft, wherein a trowel holding member that is vertically slidable is provided at a lower portion of the rotary shaft, and an air chamber provided between the lower portion of the rotary shaft and the trowel holding member. One end of a ventilation path provided on the rotary shaft is exposed to the rotary shaft, and a push-up control mechanism for pressing the trowel holding member from the lower part of the rotary shaft toward the trowel holding member is provided. Trowel detachment device.