JPH02160451A - Work device - Google Patents

Abstract

PURPOSE:To automatically perform a grind work efficiently by providing at right angles a conveyor simultaneously grinding the both side faces of the other part to the conveyor simultaneously grinding the both side faces of one part of a square work and correcting the work position at the inlet port of a grinding device. CONSTITUTION:A ceramic tile 2 is mounted on a conveyor 4, advanced in an arrow mark direction, detected by a position correcting device 13, stopped by a stopper 53 and subjected to centering via an arm by a cylinder 63. It is then mounted on a conveyor 5, pressed by an upper part conveyor, the both side faces are automatically ground by a pair of the grinding tools 39 of a grinding device 11, transferred onto a conveyor 6 and transferred onto a conveyor 7 by a transfer device 10. In this case when the tile 2 is passed through by rotating a feeding claw in counter-clockwise direction, a cylinder 29 moves a piston rod 31 in the transfer direction, pressing the upper part of the tile 2, extruding it at the speed faster than the conveyor 6 and stopping by abutting to a stopper 38. The tile 2 is then subjected to centering by a position correcting device 14, sent in to a grinding device 12 and delivered by a conveyor 9 with the remaining both side faces being ground on a conveyor 8.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an apparatus for automatically grinding four sides of a rectangular workpiece, such as a porcelain tile, during the transportation process.

PRIOR ART Square-shaped workpieces, such as stone, semi-porcelain, porcelain tiles, or bricks, are used as products depending on their use.
Grinding of two sides is required.

Conventionally, such grinding is performed by a worker placing a workpiece on a grinding machine and moving the workpiece on a grinding table while using a grinding tool to perform grinding from one side or both sides simultaneously.

According to such conventional grinding work, one worker is required for each grinding machine, which results in poor work efficiency and low productivity. skills are required.

Purpose of the Invention Therefore, the purpose of the present invention is to automate the side grinding of such rectangular workpieces, and to improve its workability and efficiency.
Furthermore, it is necessary to improve processing accuracy.

Means of Solving the Invention Based on the above object, the present invention simultaneously grinds one and both sides of the workpiece with a first grinding device during the process of conveying the workpiece along a conveyor, and then grinds the second side surface of the workpiece with a first grinding device. The remaining two sides can be ground simultaneously using a grinding device. Here, in the process of being sent along the conveyor to the first or second grinding device, the workpiece is centered in the conveying direction by the posture correcting device, and is aligned at right angles to the conveying direction at the front and back of the conveying direction. accurately regulated. For this reason, the four corners of the workpiece after grinding are accurately squared.

In addition, the present invention takes into account the special characteristics of the uneven surface of porcelain tiles, etc., and provides a belt-type upper conveyor on the conveyor, and a plurality of rollers are elastically arranged downward on the lower belt portion of the upper conveyor. By supporting while urging, the work is elastically pressed onto the conveyor during the conveyance process and accurately fixed, and is accurately positioned while preventing damage due to local external forces.

Further, the conveyor is usually bent in a direction perpendicular to the conveyor, and after the grinding process by the first grinding device, the conveyor is transferred to the conveyor in the direction perpendicular to the conveyance direction. Then, the remaining two sides are ground by a second grinding device. In the process of transferring from one transfer conveyor to the other transfer conveyor, the workpiece is forcibly transferred from one transfer conveyor to the other transfer conveyor at a speed faster than the transfer speed. Therefore, in a series of machining processes, the workpiece can be ground on both sides in the transport direction on all four sides in the transport direction without changing the direction in a plane.

Structure of the Invention FIGS. 1 and 2 show the overall structure of a processing apparatus 1 of the present invention.

This processing device 1 sequentially transports rectangular workpieces, ie, porcelain tiles 2 in this case, and grinds them during the transport process.
On the machine frame 3, in addition to a conveyor 4.5.6.7.8.9 such as a chain conveyor with a plate, and a transfer device 10,
It is assembled by a first grinding device 11, a second grinding device 12, a first posture correcting device 13, a second posture correcting device 14, and the like.

The conveyors 4.5.6 are arranged one after another in series along the linear conveyance direction, and the conveyors 7.8.9
are the end portions of the conveyor 6, and are arranged in series in sequence on a straight line orthogonal to the conveyance direction.

And these conveyors 4.5.6.7.8.9
are all driven by a drive motor 15 with a reduction gear. That is, the rotation of the drive motor 5 is transmitted to the conveyor 4.5.6 via the drive chain 716, bevel gear 17, and chain 718, and also to the conveyor 7.8.9 via the chain 719. communicated.

The transport conveyors 5.8 are located at the first and second processing stations, respectively, and in order to securely fix the porcelain tiles 2, the transport conveyors 5.8 are arranged above and below, for example, with upper conveyors 20 provided in two rows in the transport direction. Compatible. FIG. 3 shows the relationship between one conveyor 5 and the upper conveyor 20. The upper conveyor 20 is composed of a conveyor heald 24 wrapped around a pulley 22 whose axis is fixed to a frame 23 and a pulley 21 whose position is adjustable. It is in contact with a large number of rollers 25. Each roller 25 is rotatably supported by the frame 23 by an arm 26 and a horizontal fulcrum shaft 27. The spring 28 is always biased downward, that is, in the direction of the conveyor 5. In this way, the transport conveyor 5 in the processing position is combined with the upper conveyor 20 in order to fix the porcelain tiles 2.

Similarly, the transport conveyor 8 of the second processing station also corresponds to the upper conveyor 20 of the same construction.

The porcelain tiles 2 are sequentially conveyed in the direction of the conveyor 4.5.6, and are transferred to the transfer device 1 at the conveyor 6.7.
0, transfer to the conveyor 7, change direction,
Conveyed by transport conveyor 7.8.9. As shown in FIGS. 4 and 5, the transfer device 10 transfers the porcelain tiles 2 from the transfer conveyor 6 to the transfer conveyor 7 at a speed faster than the transfer speed of the transfer conveyor 6. A transfer cylinder 29 is provided at the end of the conveyor 6. That is, this transfer cylinder 29 is attached to the machine frame 3 by one bracket 30 in a state parallel to the conveyance direction of the conveyor 6, and is connected to the slider 32 at the tip of the piston rod 31. There is.

This slider 32 is supported so as to be able to move forward and backward with respect to two guide rods 33 that are stretched between the front and rear brackets 30, and the feed pawl 36 is controlled by a male screw 34 with a handle for adjustment and a female screw 35 that fits into this. keeping. A plurality of the feed pawls 36 are provided facing downward in the width direction of the conveyor 6, are supported vertically by the bins 37, and are prevented from rotating clockwise in FIG. 5, but they rotate counterclockwise. It is configured to rotate to allow the porcelain tile 2 to pass through. A stopper 38 is fixed to the machine frame 3 on one side of the conveyor 7 on an extension of the center line of the conveyor 6, facing the side of the porcelain tile 2 being fed.

Next, as shown in FIGS. 1 and 2 as well as FIG. 6, the first grinding device 11 is installed on both sides of the conveyor 5 of the first processing station, and is arranged in the conveying direction. Grinding tools 39 such as tapered cup grindstones capable of rotating at high speed are provided on both sides of the grinding wheel. That is, this grinding tool 39 is rotatably supported by a tool shaft 43 in a horizontal direction with respect to the grinding head 42, and is driven at high speed by a motor 44 on the grinding head 42 and a belt pulley 45. ing. Note that the grinding head 42 is mounted on a movable base 41.
On the other hand, the substrate 69 is rotatably supported on the horizontal plane of conveyance using the pin 70 as a fulcrum, and the fastening is fixed by the elongated hole 71 and the screw 72. Adjustment screws 73 as inclination adjustment means are provided on both sides of the movable table 41, and the angle of the substrate 69 is adjusted by letting out the adjustment screws 73. In this way, the grinding head 42 is installed in a state where it can move toward and away from the grinding tool 39 at the opposing position by moving the movable base 41 using the screw unit 46 with an adjustment handle, and further by using the screw unit 47 with an adjustment handle. has been done.

Thereby, when the width of the porcelain tile 2 changes, the distance between the grinding tools 39 at opposing positions can be adjusted by the screw unit 46 or the screw unit 47.

Furthermore, as shown in FIG. 9, the substrate 69 is rotated relative to the movable base 41 using the adjustment screw 73 according to the type of workpiece, the shape of the grinding wheel, and other processing conditions, and the grinding head 42 is set at an optimal angle with respect to the grinding surface. The tilt can be adjusted. In this way, the first grinding device 11 is constituted by two grinding blades 42 on both sides in the conveyance direction.

The second grinding device 12 of the second processing station also has exactly the same configuration as the first grinding device 11 described above.

On the inlet side of these first and second grinding bags fil, 12, a first
A posture correction device 13 and a second posture correction device 14 are provided, respectively. Since the configurations of both devices are basically the same, only the first posture correction device 13 will be described here.

That is, as shown in FIGS. 7 and 8, the first posture correction device 13 centers the porcelain tile 2 in the transport direction before grinding during the transport process of the porcelain tile 2,
It is for regulating the direction on a plane, and a pair of centering arms 51 are used as centering means.
．． 52 and the regulating bar 5 as a direction adjustment means.
It has 3. The pair of centering arms 51.
52 is supported by a frame 58 above the conveyor 4, and is supported by two guide rods 54, front and rear, in a direction perpendicular to the conveyance direction, so as to be movable toward and away from each other. Link 55 in a stopped state
．． 56 to a common intermediate link 57. The intermediate link 57 is rotatably supported by the frame 58 around a shaft 57a.
The tip of a drive arm 59 integrally attached via 7a engages with a connecting portion 61 formed between two drive rods 0. The drive loft 60 is moved forward and backward by the piston rod 64 of the drive cylinder 63, which causes the drive arm 59, intermediate link 57, link 55.5
6, the pair of centering arms 51 and 52 are driven. Note that the drive roller 0 on the tightening side engages with the drive arm 59 via a spring 62.

On the other hand, the above-mentioned regulation bar 53 is the VIi conveyor 4.
It is disposed in a direction perpendicular to the center line of
and a lifting cylinder 65 attached to the frame 58
It is connected to the piston rondro 6.

Note that each operating part of the processing device 1 is controlled by a sequence control device 80. The sequence control device 80 is
Movement of porcelain tiles 2 and conveyor 4.5.6.7.
8.9, transfer device 10, first and second grinding devices 11.1
2, and the movements of each part of the first and second posture correction devices 13 and 14 are detected, and preset sequential operations are sequentially executed.

Effect of the Invention The porcelain tile 2 to be ground is placed on the conveyor 4 by a worker or by a handling device, and reaches the position of the first posture correction device 13 along the conveyance direction of the arrow. .

The first posture correction device 13 is on standby with the pair of centering arms 51 and 52 opened and the regulation stopper 53 pulled up, but when it detects a signal from the porcelain tile 2, it operates the lifting cylinder 65. By lowering the regulation stopper 53, positioning it on the conveyance path of the porcelain tile 2, and stopping the porcelain tile 2, the plane direction, that is, the angle thereof, is adjusted to be perpendicular to the center line of the conveyor 4. At the same time, by operating the drive cylinder 63 and bringing the open centering arms 51 and 52 closer to each other, the porcelain tile 2 is sandwiched between them and its center line is indexed onto the center line of the conveyor 4. At this time, the pair of centering arms 51
．． Since the pinching force of 52 is applied by the spring 62, it is within a range that does not cause damage due to the force necessary for centering, and does not become stronger than necessary.

In this way, the porcelain tile 2 is removed by the first grinding device 11
Before being sent to the next conveyor 5, it is set in the correct orientation on the conveyor path and indexed onto the center line of the conveyor path, and then fed to the next conveyor 5.

Here, the porcelain tile 2 after posture correction is transferred to the conveyor 5.
and is pressed down from above by the upper conveyor 20, and moves in the conveying direction while being sandwiched between them. Here, the rollers 25 of the upper conveyor 20 each receive the force of the compression spring 28, and the conveyor belt 2
By pressing 4 downward, the conveyor 5
While fixing the porcelain tile 2 whose posture has been regulated on the top, the porcelain tile 2 is moved in the conveying direction at the same speed as the conveyor 5. Therefore, even if there are irregularities on the surface of the porcelain tile 2, each roller 25 follows the irregularities and moves up and down according to the elasticity of the compression spring 28, so the porcelain tile 2 will not be subjected to large local pressure. It will be moved without being subjected to force and without being damaged.

When the porcelain tile 2 moves through the pair of grinding tools 39, these grinding tools 39 rotate at high speed and contact both sides of the porcelain tile 2, that is, the sides parallel to the conveyance direction, and the surfaces are pressed against the porcelain tile 2. As the machine moves, it automatically grinds from the front end to the rear end. Therefore, the porcelain tiles 2 are transferred to this conveyor 5 and the upper conveyor 20.
In the process of moving between the porcelain tiles 2, both sides of the porcelain tile 2, that is, the opposite side, are completely ground.

Thereafter, the porcelain tile 2 is transferred onto the transport conveyor 6, and by the operation of the transfer device 10, it is transferred onto the transport conveyor 7 in the orthogonal direction.

When the transfer device 10 is in a standby state, the piston rod 31 of the transfer cylinder 29 is advanced. When the porcelain tile 2 passes under the feed pawl 36 while rotating counterclockwise, the transfer cylinder 29 moves the piston rod 31 backward, that is, in the conveying direction, so that the porcelain tile 2 is removed by the feed pawl 36. Press the lower part of 2,
The porcelain tile 2 is pushed out and moved from the conveyor conveyor 6 onto the next conveyor 7 at a speed faster than the conveyor 6, and the front end surface hits a stopper 38 and is stopped. For this reason, the porcelain tile 2 is transferred to the conveyor 4.5.
Even if the porcelain tiles 2 are sent one after another from 6 to 6, they will not collide with the preceding porcelain tile 2 at the change position of the conveyance direction, that is, the transfer position of the conveyor 7, and will be transferred to the conveyor 7, 8, or 9 one after another. Become.

In this way, the porcelain tile 2 that has been ground in the first processing station is transferred onto the conveyor 7 with both sides that have already been ground in the front and back direction of the conveyance direction, and then the other side that is to be ground is transferred to the conveyor 7. The surfaces are located on both sides in the conveyance direction.

Thereafter, as described above, this porcelain tile 2 is centered in the transport direction at the second posture correcting device 14, the direction is regulated, and sent to the second grinding device 12, where the remaining both sides are is subjected to the grinding process and sent out by the conveyor 9 on the discharge side. In addition, in the first processing stage, centering operation is essential for the porcelain tile 2, but in the second processing stage, the perpendicularity of both sides to be ground next with respect to both sides that have already been ground is required. To do this, the porcelain tile 2 is first oriented in a flat plane at the correct angle by a stopper, and then indexed in the transport direction by a centering operation.

Other Embodiments In the above embodiment, the downstream conveyor 7.8.9 is arranged in an L-shape in plan view with respect to the preceding conveyor 4.5.6. 5.6.7.
8.9 is arranged in a straight line by interposing a rotary indexing device for rotating the porcelain tile 2 906 times in a plane between the first processing station and the second processing station. You can also do it.

Effect of the invention The present invention provides the following unique effects.

As the rectangular workpiece moves along the conveyance direction, it is indexed to the correct direction and center position, and both sides are ground simultaneously, so the grinding work of the workpiece can be performed efficiently and automatically. Therefore, compared to conventional manual or semi-automatic work, the work efficiency is better (and the grinding process can be done without variations in the finished state).

After the workpiece has been ground on both sides, in the process of changing the conveyance direction for grinding the other side, the transfer device forces the workpiece to the next conveyance at a speed faster than the conveyance speed of the conveyor. Since the workpiece is transferred onto a conveyor, even if the workpiece to be ground is continuously transported, it can be transported smoothly without colliding back and forth at the part where the direction changes.

Moreover, even if there is such a change in the conveyance direction,
Before grinding both sides, the workpiece is centered in the transport direction and its direction is precisely regulated, so even if both sides are ground at the same time while the workpiece is moving, the finish will be good. The finish of the surface angle of the corner part is also improved.

In each grinding process, the workpiece is sandwiched from above and below between the lower transport conveyor and the upper conveyor, and is held by the elastically supported rollers of the upper conveyor, so that the centering state and direction regulating state of the workpiece are maintained during movement. Since the grinding process can also be ensured, the finished state of the grinding process will be good.

In addition, since the numerous rollers on the upper conveyor are each supported in a downwardly biased state, even if the surface of the workpiece is uneven, no large external force is applied locally, and therefore the grinding and conveying process , damage to the workpiece can be prevented.

Furthermore, since the grinding tool is provided at each machining position so as to be movable and adjustable in the approaching and separating directions, it is possible to flexibly respond to changes in the dimensions of the workpiece.

Furthermore, since the grinding head is mounted so that its inclination can be adjusted on the horizontal transport plane, grinding can be performed at an optimal angle depending on the type of workpiece, the shape of the grindstone, and other processing conditions.

[Brief explanation of the drawing]

Figure 1 is a plan view of the processing equipment, Figure 2 is a side view of the equipment,
FIG. 3 is a side view of the conveyor and the upper conveyor, FIG. 4 is a plan view of the transfer device, and FIG. 5 is a side view of the transfer device.
6 is a side view of the grinding device, FIG. 7 is a plan view of the posture correction device, FIG. 8 is a front view of the posture correction device, and FIG. 9 is a plan view showing the inclined state of the grinding head. 1. Processing device, 2. Porcelain tile as a rectangular workpiece, 3. Machine frame, 4.5.6.7.8.9. Conveyor, 10. Transfer device, 11. a first grinding device;
12...Second grinding device, 13...First posture corrector, 14...Second posture corrector, 20...Upper conveyor, 24...Conveyor belt, 25...Roller, 28...
Compression spring, 29. Transfer cylinder, 36. Feed claw, 38. Stopper, 39. Grinding tool, 40.
- Machine stand, 41... Movable stand, 42... Grinding head, 51.
52... Centering arm, 53... Regulation stopper, 63... Drive cylinder, 65... Lifting cylinder,
73...Adjustment as inclination adjustment means. Patent Applicant Nippei Toyama Co., Ltd. Patent Attorney Kunio Nakagawa Figure 2/Zz Figure 3 Figure 42 5 = ~Da 5 Ma

Claims (6)

[Claims] (1) A processing device that automatically grinds four sides of a rectangular workpiece, in which a first grinding device that simultaneously grinds one side of the workpiece and the other both sides of the workpiece are placed on the workpiece conveyor. and a second grinding device for simultaneously grinding the workpieces, and a posture correction device for correcting the posture of the workpiece on the conveyor at the entrance side of each grinding device. (2) The conveyor of the second grinding device is arranged perpendicularly to the conveyor of the first grinding device, and the workpiece is transferred at a speed higher than that of the conveyor at the workpiece transfer position between both conveyors. 2. The processing apparatus according to claim 1, further comprising a transfer device for forcibly pushing out the material from one conveyor to the other conveyor along the conveyance direction. (3) The processing apparatus according to claim 1 or 2, wherein the posture correction device is constituted by a workpiece centering means and a squareness adjustment means. (4) An upper conveyor is provided above the workpiece conveyor, which presses down the top surface of the workpiece and is driven in synchronization with the lower conveyor, and the lower side of the conveyor belt of this upper conveyor is aligned along the conveyance direction. Claims 1, 2, and 2 are characterized in that the rollers are extended over a plurality of rollers, and each roller is supported vertically movably via an elastic biasing means. The processing device according to item 3 or 4. (5) A patent claim characterized in that the first and second grinding devices are provided with a pair of grinding heads that face each other at the grinding position in the conveyance direction, and the grinding heads are attached by means of movement adjustment means in the approaching and separating directions. A processing device according to scope 1, 2, 3, or 4. (6) The processing according to claim 5, characterized in that each of the grinding heads provided in the first and second grinding devices is mounted so that the inclination can be adjusted on the horizontal surface of the workpiece conveyance by means of inclination adjusting means. Device.