JP3131962U - Clay rolling equipment - Google Patents

Abstract

An apparatus for rolling clay into a sheet is provided. The automatic rolling apparatus is capable of reducing the load on a rolling roller and smoothly extending clay.
Clay is sandwiched between a pair of pressing plates through a resin film, the pressing plate is sandwiched between a driven rolling roller and a driving rolling roller, and the rolling rollers are rotated to rotate the rolling plate. The pressing plate is moved back and forth to extend the clay, and the clay is removed by alternately repeating the descending of the driven side rolling roller and the back and forth movement of the pressing plate by the rotation of the driving side rolling roller and the driven side rolling roller. It is a device that extends thinly in stages, and when the clay thickness is large, the descending amount of the driven rolling roller is increased and the number of times the pressure plate is moved back and forth is decreased, and the follower is increased as the clay thickness decreases. The lowering amount of the side rolling roller was decreased and the number of times the pressing plate was moved back and forth was increased.
[Selection] Figure 1

Description

Detailed description of the invention

  The present invention relates to a clay rolling apparatus that stretches clay (including paper clay) between rolling rollers and extends it into a sheet shape.

When making clay dolls, accessories, interior products, ceramics, etc., clay that is spread thinly into a sheet may be used. Usually, clay is marketed in the form of brick or konjac blocks, but if this is thinly stretched into a sheet, this clay is cut with scissors or a knife and handled like paper or cloth. Can be used, and the use is expanded.
Such clay sheets may be required to various thicknesses, for example 2 to 1 mm or less, and therefore must be stretched each time.
In order to easily make clay sheets having such various thicknesses, the present applicant has developed a rolling apparatus described in “JP-A-5-262098” and “JP-A-5-310000” in the past. In this, a pair of pressing plates are sandwiched between a pair of driving side rolling rollers and a driven side rolling roller, clay is sandwiched between these pressing plates via a pair of resin films, and the pressing plate is rotated by the rotation of the rolling roller. The clay is crushed by pushing forward and backward, and the gap between the pressing rollers is reduced to narrow the gap between the pressing plates, thereby producing a clay sheet having a desired thickness between the pressing plates.
In this case, the resin film plays a role of preventing clay from adhering to the pressing plate and facilitating spreading smoothly.

  Japanese Patent Laid-Open No. 5-262098   Japanese Patent Laid-Open No. 5-310000

However, the clay rolling device disclosed in the above publication only discloses a structure in which the rotation of the rolling roller and the dimensions between the rolling rollers are manually operated, and a fully automatic device has not been shown. On the other hand, when trying to make a large amount of clay sheets of various thicknesses, there is a problem that turning a roller manually requires a considerable amount of labor.
Therefore, it is desired to develop an automated apparatus that can easily obtain a clay sheet having a desired thickness by rotating the rolling roller with a motor and adjusting the dimension between the rolling rollers with a motor.
In this case, the clay has a small flat area at the stage where the thickness is large, and since the area in contact with the pressing plate is small, the resistance when the clay is extended is relatively small, but the flat area increases as the clay is gradually extended. Thus, the area in contact with the pressing plate increases, and the resistance increases. Therefore, there is a problem that the load applied to the rolling roller increases as the spreading proceeds, and there is a problem that a large roller or a high-power motor is required to overcome the resistance of clay.
The present invention has been made based on such circumstances, and a clay rolling device capable of smoothly extending the clay by reducing the load applied to the rolling roller with respect to the clay having increased resistance as the thickness is reduced. Is to provide.

    In order to achieve the above object, in the present invention, clay is sandwiched between a pair of pressing plates via a pair of resin films, and the pair of pressing plates are sandwiched between a driving side rolling roller and a driven side rolling roller, and these rollings are performed. By rotating the rollers reversely to each other, the pair of pressing plates are moved back and forth so as to extend the clay, the descending of the driven side rolling roller, the driving side rolling roller and the driven side rolling roller It is a clay rolling device in which the clay is extended thinly stepwise by alternately repeating back and forth movement of the pressing plate by mutual rotation, and a pair of a base and a pair standing upright on the base , A drive-side rolling roller rotatably installed between the side walls, a reciprocating motor for rotating the drive-side rolling roller forward and backward, and the side wall A pair of elevating plates each mounted so as to be movable in the vertical direction, and both ends of the elevating plates are rotatably supported by the elevating plates. A driven-side rolling roller that narrows the gap between the rollers, a power transmission chain mechanism that converts the rotation of the driving-side rolling roller rotated by the motor into rotation in the reverse direction of the driven-side rolling roller, and the pair of pairs An interval changing shaft that is rotatably installed between the side walls, a cam mechanism that is provided at both ends of the interval changing shaft and moves the elevating plate up and down as the shaft rotates, and the interval changing shaft The interval change motor for rotating the roller, the reciprocating motor and the interval change motor are controlled, and the driven side rolling roller is used at the stage where the thickness of the clay to be extended is large. The lowering amount of the rolling plate is increased and the number of times the pressing plate sandwiched between the two rolling rollers is reduced. There is provided a clay rolling device including a controller for increasing the number of times.

When the clay is thick, the flat area is smaller than when the clay is thinly stretched, and therefore the contact area with the pressing plate is also small. For this reason, the resistance which resists the force which tries to crush is also small. On the other hand, as the clay spreads and becomes thinner, the flat area of the clay increases and the contact area with the pressing plate also increases, so the stress against the force to be crushed also increases.
Therefore, in the stage where the thickness is large and the resistance is small, the thickness can be greatly reduced in the initial stage by increasing the pressing stroke, and the efficiency is improved. When the thickness is reduced, the pressure applied to the rolling roller can be reduced by reducing the pressing stroke. Therefore, the roller driving motor can also have a low output.
The reason why the pair of pressing plates are sandwiched between the rolling rollers and the clay is sandwiched between the pressing plates and the pressing plates are moved back and forth by forward and reverse rotation of the rolling roller is to make the thickness of the clay uniform. Clay is a plastic material having a slight elasticity, depending on the type, and when it is pushed and extended, it may return slightly elastic when its external force is removed. At the stage where the thickness is large, even if the elasticity is restored to some extent, the desired thickness of the clay sheet is not affected, so there is no problem even if the number of back and forth reciprocations of the pressing plate is reduced. Since accuracy is not required so much, the working time can be shortened by reducing the number of back and forth reciprocations. As the thickness decreases, the accuracy of the desired clay sheet thickness and thickness uniformity increases, so the number of reciprocating movements of the pressure plate is increased, thereby eliminating the elastic recovery of the clay. To make the sheet of uniform thickness desired.
Therefore, since the load on the roller can be reduced, the rolling roller can be reduced, and a small and low output motor can be used as the roller drive motor. Efficiency is improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 is a perspective view of the entire clay automatic rolling apparatus, FIG. 2 is a diagram showing the chain power transmission path of the driving side rolling roller and the driven side rolling roller, FIG. 3 is a diagram showing the eccentric shaft of the interval changing shaft, FIG. FIG. 5 is a perspective view showing a pressing plate, a resin film, and clay sandwiched between a driving side rolling roller and a driven side rolling roller, and FIG. 6 is a driving side rolling roller and driven side rolling. FIG. 7 is a diagram showing a state in which clay is rolled between rollers, and FIG. 7 is a diagram showing an operation flow controlled by a controller and a clay rolling state.

In the figure, reference numeral 1 denotes a base, and a pair of side walls 2 and 2 are erected on the base 1 so as to face each other on the left and right. On the side walls 2 and 2, a driving side rolling roller 3 and a driven side rolling roller 4 are installed in parallel and spaced apart from each other. Both ends of the driving side rolling roller 3 are rotatably supported by the side walls 2 and 2, and a reversible motor 5 is connected to one end of the driving side rolling roller 3. The reversible motor 5 is attached to the base 1 outside the one side wall 2, and when the reversible motor 5 rotates in one direction, the drive side rolling roller 3 rotates in one direction, and reversible. When the motor 5 rotates in the reverse direction, the driving side rolling roller 3 also rotates in the reverse direction.
The driven-side rolling roller 4 is positioned above the driving-side rolling roller 3 and is attached so as to be movable up and down. Both ends of the driven rolling roller 4 are attached to the lift plates 6 and 6 through the side walls 2 and 2. The elevating plates 6 and 6 are arranged so as to be movable up and down along the outer surfaces of the side walls 2 and 2, and both ends of the driven rolling roller 4 are rotatably attached to the elevating plates 6 and 6. Therefore, the driven-side rolling roller 4 moves up and down integrally with the lifting plates 6 and 6.
The driving-side rolling roller 3 and the driven-side rolling roller 4 are connected to each other by a chain 7 shown in FIG. That is, a driving side sprocket 8 is attached to the end of the driving side rolling roller 3, and a driven side sprocket 9 is attached to the end of the driven side rolling roller 4. An idle sprocket 10 is attached to the side wall 2. The chain 7 is stretched between a drive-side sprocket 8 and an idle sprocket 10, and the driven-side sprocket 9 is in the middle of the chain 7 traveling between the sprockets 8 and 10 with respect to the outside thereof. Are engaged.
When the drive-side rolling roller 3 is rotated in one direction by the reversible motor 5, the drive-side sprocket 8 rotates integrally, the chain 7 meshing with the drive-side sprocket 8 travels, and the idle sprocket 10 is also the same. Rotate in the direction. In the middle of the chain 7, the driven sprocket 9 meshing with the outer side of the chain 7 rotates in the opposite direction to the driving side sprocket 8. Therefore, the driving side rolling roller 3 and the driven side rolling roller 4 rotate in the opposite direction at the same speed in synchronization with each other. Of course, even when the reversible motor 5 is reversed, the driving-side rolling roller 3 and the driven-side rolling roller 4 rotate in the opposite directions at the same speed.

An interval changing shaft 11 is disposed above the driven rolling roller 4. Although this shaft 11 is not shown in detail, both ends of the shaft 11 are rotatably supported by the side walls 2, 2, and as shown in FIG. Is formed. The Excel shaft 12 is eccentric with respect to the shaft 11 and has an eccentric amount m that causes a displacement of, for example, about 7 mm up and down when the shaft 11 rotates 180 degrees.
These Excel shafts 12 and 12 are rotatably attached to the elevating plates 6 and 6. Therefore, when the interval changing shaft 11 rotates, the Excel shaft 11 revolves, so that the elevating plates 6 and 6 move up and down. The amount of movement is, for example, m = maximum of about 7 mm in relation to the amount of eccentricity m. As a result, the driven-side rolling roller 4 also moves up and down and approaches the driving-side rolling roller 3 when lowered, so that the distance from the driving-side rolling roller 3 is narrowed.
When the elevating plates 6 and 6 and the driven side rolling roller 4 move up and down, the driven side sprocket 9 also moves up and down, but by allowing the chain 10 to be slack, the driven side sprocket 9 is allowed to move up and down. .

The interval changing shaft 11 is operated by an interval changing motor 13 which can be reversed. That is, as shown in FIG. 4, a pedestal 14 is provided on one side wall 2, and the interval changing motor 13 is attached to the pedestal 14. A small spur gear 15 is attached to a drive shaft of the interval changing motor 13, and a large spur gear 16 is engaged with the small spur gear 15. A worm shaft 17 is connected to the large spur gear 16, and a worm wheel 18 is engaged with the worm shaft 17. The worm wheel 18 is attached to the interval changing shaft 11, and the worm wheel 18 and the interval changing shaft 11 rotate together.
As a result, the rotation of the interval changing motor 13 is decelerated and transmitted to the interval changing shaft 11, and the rotation of the interval changing shaft 11 rotates the Excel shaft 12, so that the elevating plates 6 and 6 are moved up and down. Therefore, the driven-side rolling roller 4 moves toward and away from the driving-side rolling roller 3, thereby changing the distance L (FIG. 6) between the driving-side rolling roller 3 and the driven-side rolling roller 4.

  A thickness setting device 20 for setting the thickness of the clay to a desired thickness is attached to the gantry 14. The setting device 20 includes a setting knob 21, and a desired clay thickness can be determined by rotating the setting knob 21. For example, when it is desired to set the thickness of the clay to 1.0 mm, the thickness can be set to 1.0 mm by turning the knob 21 and the display unit 22 can display 1.0 mm.

As shown in FIGS. 1 and 6, support arms 23... Are attached to the base 1 in front of and behind the drive-side rolling roller 3. These support arms 23 extend in the front-rear direction (the left-right direction in FIG. 6) of the drive-side rolling roller 3, and a plurality of support rollers 24 are rotatably attached to the upper portions of the arms 23, respectively. ing. The upper surfaces of these support rollers 24 are provided so as to have a height substantially equal to the upper surface of the drive-side rolling roller 3. These supporting rollers 24 ... play a role of supporting the pressing plate and assisting the back-and-forth movement when a pressing plate described later moves back and forth.
Further, as shown in FIG. 6, limit switches 25a and 25b are attached to the support arm 23, one each at the front and rear. These limit switches 25 a and 25 b detect the position of the pressing plate that moves back and forth, and send this detection signal to the controller 26.
The controller 26 is installed in the vicinity of the reversible motor 5 on the base 1 and controls the reversible motor 5 and the interval changing motor 13. By this controller 26, the rolling apparatus of this embodiment automatically operates in the order as shown in FIG. This operation will be described later.
Note that a start switch 27, an emergency stop switch 28, and the like are attached to the controller 26.

  The rolling apparatus according to this embodiment is configured as described above. When this apparatus is used, a rolling tool as shown in FIG. 5 is used. That is, 30 indicates clay, and this clay 30 is sandwiched between a pair of pressing plates 32 and 32 via resin films 31 and 31. In this example, the pressing plates 32 and 32 are made of, for example, transparent acrylic resin, have a rectangular shape of about 700 mm × 450 mm, and have a thickness of about 5 mm. The clay 30 is sandwiched between the pair of pressing plates 32 and 32. At this time, the resin films 31 and 31 are interposed between the clay 30 and the pressing plates 32 and 32, respectively. The resin films 31 and 31 are polypropylene, polyethylene resin, etc., and are transparent about 0.1 to 0.3 mm. The resin films 31 and 31 prevent the clay 30 from adhering to the pressing plates 32 and 32, improve the sliding when the clay 30 extends, reduce friction, and apply the thinly extended clay to the pressing plate. When it peels from 32, 32, it plays the role of preventing tearing.

The operation of thinly extending clay using the rolling apparatus and tools as described above will be described together with the operation of the controller 26.
The clay 30 is thinned to about 5 mm in advance before being set in the apparatus. Such clay 30 is sandwiched between pressing plates 32 and 32 via resin films 31 and 31 to form a sandwich. At this time, the thickness of the pressing plates 32 and 32 containing clay is about 15 mm because the thickness of the clay is about 5 mm and the thickness of the pressing plate 32 is about 5 mm.
The pressing plates 32, 32 sandwiching such clay in a sandwich shape are placed on the support roller 24 on the rear side so that one end thereof is inserted between the driving side rolling roll 3 and the driven side rolling roll 4. Then, the pressing plate 32 pushes one limit switch 25 a and sends a signal to the controller 26.
Here, the setting knob 21 of the thickness setting device 20 is operated to set the desired clay thickness t. With this setting, the display unit 22 displays a set value t, for example, 1.0 mm.

(First descent)
Next, when the start switch 27 of the controller 26 is pressed, the interval changing motor 13 is operated to rotate the interval changing shaft 11 through the gears 15 and 16, the worm shaft 17 and the worm wheel 18. By this rotation, the Excel shaft 12 is rotated, so that the elevating plate 6 is lowered. For this reason, the driven side rolling roller 4 descends, the interval L with the driving side rolling roller 3 is narrowed, and the pressing plates 32 and 32 are sandwiched. At this time, the descending amount of the driven side rolling roller 4 is set to about 3 mm, for example.
When the driven-side rolling roller 4 is lowered by about 3 mm as described above, this lowering is temporarily stopped and the reversible motor 5 is operated. The reversible motor 5 rotates in the forward direction, and the driven rolling motor 4 rotates in reverse in synchronism with this. Accordingly, the pressing plates 32 and 32 sandwiched between the rollers 3 and 4 are fed forward (rightward in FIG. 6) with the clay 30 sandwiched therebetween. During this time, the pressing plates 32 and 32 are pressed according to the distance between the rolling rollers 3 and 4, so that the clay is crushed. The pressing plates 32, 32 are supported by support rollers 24, so that the back-and-forth movement is kept smooth.
When the pressing plates 32, 32 move forward and the rear end of the plate 32, that is, the left end in the figure passes through one limit switch 25 a, the limit switch 25 a sends a signal to the controller 26. Therefore, the controller 26 sends a reverse rotation command to the reversible motor 5. Therefore, the reversible motor 5 rotates in the reverse direction, and the driving side rolling roller 3 and the driven side rolling roller 4 rotate in the reverse direction.
For this reason, the press plates 32 and 32 are sent back (left direction in FIG. 6). When the right end of the plate 32 passes the other limit switch 25b, the limit switch 25b sends a signal to the controller 26, and the controller 26 sends a forward rotation command to the reversible motor 5. Therefore, the pressing plates 32 and 32 are advanced again.
In this way, the pressing plates 32, 32 are reciprocated, thereby equalizing the clay thickness. At this stage, for example, three reciprocations are performed.

(Second descent)
When the pressing plates 32 and 32 are moved back and forth three times, the controller 26 operates to lower the second time. That is, the interval changing motor 13 is actuated by a command from the controller 26, the interval changing shaft 11 is rotated, the excel shaft 12 is rotated, and the elevating plate 6 is lowered as in the first descent. For this reason, the driven side rolling roller 4 descends, the interval L with the driving side rolling roller 3 is narrowed, and the pressing plates 32 and 32 are pressed. At this time, the descending amount of the driven side rolling roller 4 is set to about 1.5 mm, for example.
When the driven-side rolling roller 4 is lowered by about 1.5 mm as described above, the descent stops and the reversible motor 5 is operated. The reversible motor 5 repeats forward rotation and reverse rotation, and rotates the driving side rolling roller 3 and the driven side rolling motor 4 forward and backward to reciprocate the pressing plates 32 and 32 back and forth with the clay 30 sandwiched therebetween.
The number of reciprocating movements at this time is set to, for example, 4 reciprocations.

(3rd descent)
When the back and forth reciprocation of the pressing plates 32 and 32 is performed four times, the controller 26 is further operated to lower the third time. This lowering also causes the interval changing shaft 11 and the Excel shaft 12 to rotate by the rotation of the interval changing motor 13, the elevating plate 6 is lowered, and the driven side rolling roller 4 is lowered. The pressure plates 32, 32 are pressed and narrowed.
At this time, the descending amount of the driven side rolling roller 4 is set to about 0.5 mm, for example.
Then, when the driven side rolling roller 4 is lowered by about 0.5 mm as described above, the descent stops and the reversible motor 5 repeats normal rotation and reverse rotation, so that the driving side rolling roller 3 and the driven side rolling motor 4 are moved forward. And reverse. Therefore, the pressing plates 32 and 32 are reciprocated back and forth with the clay 30 interposed therebetween.
The number of reciprocating movements at this time is set to 8 reciprocations, for example.
By the third descent, the driven-side rolling roller 4 has been lowered by a total of 4 mm, and the 5.0 mm thick clay is 1.0 mm. Moreover, since the number of reciprocating movements of the pressing plates 32 and 32 is performed eight times, the clay is extended to a uniform thickness throughout.

When such an operation is completed, the interval changing motor 13 rotates in the reverse direction, the interval changing shaft 11 is rotated in the reverse direction, the Excel shaft 12 is returned, and the elevating plate 6 is raised. For this reason, the driven-side rolling roller 4 is raised, the interval L with the driving-side rolling roller 3 is widened, and the sandwiched pressing plates 32, 32 are released.
When the driven-side rolling roller 4 returns to the original height, the operation of the controller 26 is finished.
Therefore, when the pressing plates 32 and 32 are taken out from the apparatus, and the pressing plates 32 and 32 are separated and the resin films 31 and 31 are peeled off from the clay 30, a clay sheet having an even thickness that is thinly stretched is obtained.

The operation of the apparatus as described above has the following advantages.
That is, in the initial stage of rolling the clay, as shown in FIG. 7, the clay 30 has a large thickness but a small flat area. Therefore, the contact area with the pressing plate 32 is small, so that the resistance to the extending force is small. For this reason, it can be extended with a relatively small force, and the amount of crushing (down stroke) may be increased. Thereby, thinning can be advanced greatly and efficiency becomes good.
As rolling progresses, as shown in FIG. 7, the area of the clay increases, so that the contact area with the pressing plate 32 increases, and thus the resistance to the extending force also increases. At this stage, if a large amount of crushing is attempted, a large load is applied to the rolling rollers 3 and 4, and it is necessary to make the rollers 3 and 4 have high rigidity. On the other hand, if the crushing amount (lowering stroke) is made small and extended step by step, the load applied to the rolling rollers 3 and 4 can be small, and the output of the motor can be low. Therefore, it is possible to reduce the size and cost.
Moreover, in the initial stage of rolling, the uniformity in the thickness of the clay is not so important, so the number of times the pressing plates 32, 32 are moved back and forth is reduced to shorten the working time, while the rolling proceeds. Accordingly, the equalization of the thickness of the clay is desired. Therefore, the number of reciprocating movements of the pressing plates 32 and 32 can be increased, the accuracy of the thickness can be increased, the equalization can be promoted, and the product accuracy can be improved.
From the above, it is possible to reduce the size and output of the rolling roller and the reversible motor, increase the work efficiency, and easily make a clay sheet with high product accuracy.

  The perspective view of the whole automatic rolling machine of clay which shows one example of the present invention   The figure which shows the chain power transmission path of a drive side rolling roller and a driven side rolling roller   Diagram showing eccentric shaft of shaft for interval change   Diagram showing the drive system for changing the interval   The perspective view which shows the press plate, resin film, and clay pinched | interposed between a driving side rolling roller and a driven side rolling roller   The figure which shows the state which is rolling the clay between a driving side rolling roller and a driven side rolling roller   Diagram showing the operation flow controlled by the controller and the rolling state of clay

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Side wall 3 ... Drive side rolling roller 4 ... Driven side rolling roller 5 ... Reversible motor 6 ... Elevating plate 7 ... Chain 8, 9, 10 ... Sprocket 11 ... Spacing shaft 12 ... Excel shaft 13 ... Interval changing motor 21 ... Thickness setting knob 26 ... Controller 30 ... Clay 31 ... Resin film 32 ... Pressing plate

Claims (1)

The clay is sandwiched between a pair of pressing plates via a pair of resin films, the pair of pressing plates are sandwiched between a driving side rolling roller and a driven side rolling roller, and the rolling rollers are rotated in reverse to each other. A pair of pressing plates are moved back and forth to extend the clay, and the driven side rolling roller descends and the driving side rolling roller and the driven side rolling roller move back and forth by mutual rotation. , A clay rolling device that thins the clay in stages by repeating alternately,
A base, a pair of side walls erected on the base opposite to each other, a drive-side rolling roller rotatably installed between the side walls, and a reciprocating movement for rotating the drive-side rolling roller forward and backward Motor, a pair of elevating plates attached to the side walls so as to be movable in the vertical direction, and both ends are rotatably supported by the elevating plates, and move up and down as the elevating plates move up and down. In this case, the driven side rolling roller that narrows the distance from the driving side rolling roller and the transmission of power transmitted by converting the rotation of the driving side rolling roller rotated by the motor into rotation in the reverse direction of the driven side rolling roller. A chain mechanism, an interval changing shaft that is rotatably mounted between the pair of side walls, and both ends of the interval changing shaft, and the elevator plate is moved up and down as the shaft rotates. The cam mechanism, the interval changing motor for rotating the interval changing shaft, the reciprocating motor and the interval changing motor, and at the stage where the thickness of the clay to be extended is large, the driven rolling roller Increasing the lowering amount and reducing the number of back and forth movements of the pressing plate sandwiched between both rolling rollers, decreasing the amount of lowering of the driven rolling roller and decreasing the number of back and forth movements of the pressing plate as the clay thickness decreases. And a controller for increasing the volume of the clay.

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