JPH0448922Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a front and back automatic grinding device that automatically grinds the front and back surfaces of a plate-shaped workpiece, and particularly relates to a compact grinding device that requires a small installation space.

BACKGROUND ART Grinding devices that automatically grind the front and back surfaces of a plate-shaped workpiece have been known for the purpose of deburring, surface finishing, etc. of the plate-shaped workpiece. this is,
For example, as described in Japanese Utility Model Application Publication No. 55-107948, the conveyor is equipped with a conveyor on which a plate-shaped work is placed and conveyed, and a grinding machine installed above the conveyor. A grinder automatically grinds the top surface of a plate-shaped workpiece that is placed on a conveyor and transported.

On the other hand, by arranging two such grinding devices in series and providing a reversing device between them for reversing the plate-shaped workpiece upside down, it is possible to continuously and automatically grind the front and back surfaces of the plate-shaped workpiece. An automatic grinding device for front and back surfaces is being considered. FIG. 5 shows an example of the grinding device 114 that grinds the front surface 112 of the plate-shaped workpiece W, and the back surface 11 of the plate-shaped workpiece W.
A first grinding device 118 for grinding the plate-like work W is arranged in a straight line, and an inverting device 120 for inverting the plate-shaped work W upside down is provided between them. The grinding devices 114 and 118 are constructed in exactly the same way, and both include a conveyor 122 and a grinder 124. This conveyor 122 carries a plate-shaped work W on a conveyor belt 126 which is wound around a pair of rolls and driven to rotate.
The grinding machine 124 uses a grinding belt 128 wound around a pair of rolls and driven to rotate to convey the conveyor belt 126.
This grinds the upper surface of a plate-shaped workpiece W that is placed on top and transported.

The reversing device 120 also includes a pair of arms 132 rotatably attached to a shaft 130 that is substantially horizontal and perpendicular to the conveyance direction of the conveyor 122;
134, and their arms 13
2,134, the plate-like workpiece W whose surface 112 has been ground by the first grinding device 114 is attached to the arm 132.
By reaching the top, they are each rotated upwardly as shown in FIG. At this time,
Both arms 132 and 134 are slightly inclined toward the arm 134 side, and the plate-shaped workpiece W lifted by the arm 132 with the surface 112 facing upward.
becomes supported by arm 134 with its surface 112 facing slightly downward. Thereafter, both the arms 132 and 134 are returned to their substantially horizontal original positions, so that the plate-like workpiece W is placed on the back side 1.
16 is placed on the conveyor 122 of the first grinding device 118, and the third grinding device 118
Grinding is performed on the back surface 116 by.

Note that FIG. 7 shows another example of a reversing device for reversing the plate-shaped workpiece W upside down. 140 is intermittently rotated each time a plate-shaped work W arrives on one arm 138, and the plate-shaped work W is placed on the conveyor 122 of the grinding device 118 while being continuously reversed.

Problems to be Solved by the Invention However, such conventional front and back automatic grinding devices simply have two grinding devices arranged in series and a reversing device installed between them, so they cannot be used for grinding only one side. In addition to doubling the equipment compared to
There was a problem that the installation space in the length direction became very large.

Means for Solving the Problems The present invention was made against the background of the above circumstances, and its purpose is to provide a compact front and back automatic grinding device that requires a small installation space.

In order to achieve such an object, the present invention provides a front and back automatic grinding device that automatically grinds the front and back surfaces of a plate-shaped work, which (a) can place two plate-shaped works in parallel; (b) a conveyor having a width dimension and conveying the plate-shaped work in two rows on a first conveyance side and a second conveyance side; (b) disposed on the conveyance path of the conveyor and conveyed in the two rows; (c) a grinder that grinds the upper surface of each of the plate-shaped works; and (c) a grinder that grinds the upper surface of the plate-shaped work that has been conveyed on the first conveyance side of the conveyor and whose upper surface has been ground by the grinder, and that grinds the opposite surface of the plate-shaped workpiece. (d) a return device for returning the grinder to an upstream side of the grinder in the conveyance direction of the conveyor in order to place it on the first conveyance side of the conveyor for grinding; and (d) a combination of the conveyor and the return device. The apparatus is characterized by comprising an inverting device disposed at one of two transfer positions between which the plate-shaped work is transferred, and for inverting the plate-shaped work upside down.

Function and Effects of the Invention In such an automatic front and back grinding device, first, a plate-shaped workpiece is placed on the first conveyance side of the conveyor and conveyed, and then a grinding machine performs a grinding process on the upper surface of the workpiece. be done. Thereafter, the plate-shaped workpiece is sent back to the upstream side of the grinder in the transport direction of the transport conveyor by the return device, and is placed on the first transport side of the transport conveyor.
At the time of delivery from the first transport side to the return device or from the return device to the second transport side, the plate-shaped work is turned upside down by the reversing device.
Therefore, when the plate-shaped work is placed on the first conveyance side of the conveyor, the top and bottom of the workpiece are reversed from when it was placed on the first conveyance side, and the plate-shaped workpiece is conveyed on the first conveyance side. At the time of grinding, the upper surface of the plate-shaped workpiece is ground by a grinding machine, so that both the front and back surfaces of the plate-shaped workpiece are ground.

In this way, the front and back automatic grinding device of the present invention uses a common transport conveyor and grinding machine by returning a plate-shaped workpiece whose one side has been ground to the upstream side of the grinding machine using the return device. Because it is designed to grind both the front and back sides using
Although it requires a return device and a reversing device, it can grind both the front and back sides with almost the same equipment as a single-side grinding device, and the device is more compact than the conventional device that had two grinding devices side by side. It is structured as follows, and the installation space is small.

Note that the above-mentioned reversing device includes the conventional reversing devices 120 and 13 shown in FIGS. 6 and 7.
6 etc. can be used as is, but if the plate-like workpiece is made of steel material that is attracted to a magnet,
For example, it has a pair of rolls arranged approximately horizontally, and an endless belt that is wound around the pair of rolls and driven to rotate, and one of the pair of rolls on which the endless belt rotates downward. Using a reversing device consisting of a roll made of magnets,
It is also possible to reverse a plate-shaped work placed on the endless belt while being attracted by a magnet. In that case, the plate-shaped workpiece is continuously reversed by the continuous rotation of the endless belt, so compared to the case where the plate-shaped workpiece is intermittently reversed after waiting for the arrival of the plate-shaped workpiece like the above-mentioned reversing devices 120 and 136. do,
A sensor or the like for detecting the plate-shaped workpiece is not required, and the flow of the plate-shaped workpiece becomes smoother, thereby improving the throughput of the grinding apparatus as a whole.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

In FIGS. 1 to 3, reference numeral 10 denotes a conveyor on which a plate-shaped work (hereinafter simply referred to as a work) W is placed and conveyed. This conveyor 10
is a pair of driving rolls 12 and driven rolls 14 provided substantially horizontally, and the rolls 12, 1.
Conveyor belt 16 wrapped around 4
When the drive roll 12 is rotationally driven, the workpiece W supplied onto the conveyor belt 16 from the left side in FIG. 1 is conveyed rightward. The conveyor belt 16 has a width dimension sufficiently larger than that of the workpiece W, and the supply side of the workpiece W, that is, the left side in FIG. 22, and two workpieces W are placed in parallel and transported in two rows. Further, the workpiece W to be ground is first fed onto the first conveyance side 20 by a feeding device (not shown).

A grinder 24 for grinding the upper surface of the workpiece W is provided at an intermediate portion of the transport path of the workpiece W by the transport conveyor 10. This grinder 24 grinds the upper surfaces of the workpieces W conveyed in two rows by the conveyor 10, and has a width that is approximately the same as the width of the conveyor belt 16. The grinding machine 24 also rotates a grinding belt 28 wound around a contact roll 26 and a tension roll (not shown) in the opposite direction to the conveyance direction of the workpiece W, as shown by the arrow in FIG. Grinding operations such as deburring and surface finishing are performed by pressing the upper surface of the work W while rotating it so as to move in the direction. Workpiece W during this grinding
In order to prevent slippage between the conveyor belt 16 and the conveyor belt 16, anti-slip particles such as grinding particles are attached to the surface of the conveyor belt 16, and the inner circumference of the conveyor belt 16 attracts the work W. A magnetic chuck 30 is provided for movement with the conveyor belt 16. The conveyor belt 16 is made of a material that easily passes magnetic force, and
The workpiece W of this embodiment is made of a steel material or the like and is attracted to a magnet.

Further, chute 32 and 34 are provided at the downstream end of the transport conveyor 10, that is, at the end on the right side in the figure, for sliding down the transported work W. The chute 32 is disposed at the end of the first conveyance side 20, and is used to collect the work W that has been conveyed through the first conveyance side 20 while being ground by the grinding machine 24.
is slid onto the reversing conveyor 36.
Further, the chute 34 is disposed at the end of the first conveyance side 22, and the workpiece W, which has been conveyed through the first conveyance side 22 while being ground by the grinding machine 24, is
It is discharged outside the device and sent to a subsequent process, or stored in a storage box or the like. Note that these chute 32, 34 are provided with a plurality of grooves to reduce friction with the workpiece W.

The reversing conveyor 36 constitutes a reversing device, and as shown in an enlarged view in FIG. The workpiece W that has been slipped from the chute 32 onto the reversing belt 42 is rotated to the right in the figure by the drive roll 38 being rotationally driven. It is conveyed to the driven roll 40 side. At least the outer peripheral portion of the driven roll 40 is made of a magnet,
The work W placed on the reversing belt 42 and transported is attracted to the driven roll 40 and rotated downward around the driven roll 40. As a result, the workpiece W is turned upside down and separated from the driven roll 40 with the movement of the reversal belt 42, thereby being dropped onto the horizontal conveyor 44 in its inverted position. A plurality of crosspieces 4 are provided on the surface of the reversing belt 42.
6 is provided, and by engaging with the workpiece W, the workpiece W is forcibly separated from the driven roll 40. In addition, the driven roll 40
A cover 48 is provided on the outer periphery of the workpiece W to prevent the workpiece W from flying out.

The horizontal flow conveyor 44 is disposed substantially perpendicular to the conveyor 10, and the drive roll 50
The workpiece W that has fallen onto the conveyor belt 54 wrapped around the driven roll 52 passes under the chute 34 to the front side of the conveyor 10.
That is, it is conveyed to the lower side of FIG. A guide plate 56 that engages with the conveyed work W is provided on the downstream side of the horizontal conveyor 44 in an attitude inclined with respect to the conveyance direction. It is brushed off from the belt 54 onto the chute 58 and transferred onto the reverse conveyor 60. This chute 58 is also provided with a plurality of grooves to reduce friction with the workpiece W, similar to the chute 32 and 34 described above.

The reverse conveyor 60 is arranged substantially parallel to the side of the conveyor 10 in plan view,
The workpiece W placed on the conveyor belt 66 wound around the drive roll 62 and the driven roll 64 is placed on the upstream side of the grinder 24 in the conveyance direction of the conveyor 10 in the opposite direction to the conveyance direction of the conveyor 10. , that is, it is conveyed to the left side.
The drive roll 62 of this reverse conveyor 60 is provided at a higher position than the transport conveyor 10, and the transported workpiece W slides down onto the rotating disk 70 from a chute 68 provided at its tip. After that, it is transferred onto the first transport side 22 of the transport conveyor 10. The rotating disk 70 is rotated clockwise in FIG. 1 by a motor 72, and above the rotating disk 70 is a workpiece placed on the rotating disk 70 to be rotated. A guide plate 74 is provided that engages with the work W and delivers the work W onto the conveyor 10. A cover 76 is provided around the rotating disk 70 to prevent the workpiece W from flying out, and the guide plate 74 is attached to the cover 76.

Next, the operation of the front and back automatic grinding device configured as above will be explained.

Workpiece W that requires deburring, surface finishing, etc.
is conveyor 1 by a supply device (not shown).
The upper surface of the paper is ground by the grinder 24 during the process of being transported by the transport conveyor 10. The workpiece W, which has been ground on one side, then slides down from the tip of the first conveyance side 20 onto the chute 32 and is transferred onto the reversing conveyor 36, where it is reversed vertically by the action of the magnet of the driven roll 40, and then transferred to the horizontal conveyor 44. placed on top.
The workpiece W transported to the front side of the transport conveyor 10 by the cross-flow conveyor 44 is transferred onto the reverse transport conveyor 60 by the guide plate 56 and the chute 58, and is placed upstream of the grinder 24 in the transport direction of the transport conveyor 10. It is sent back to the side. Then, the workpiece W that has slipped from the tip of the reverse conveyor 60 onto the chute 68 is placed on the rotating disk 70 and guided by the guide plate 74 to the conveyor 1.
The grinding machine 2 is transferred onto the conveyor side 22 of the
4, the upper surface is ground. Work W at this time
Since the surface is turned upside down by the reversing conveyor 36 compared to when it is conveyed on the first conveyance side 20, the surface opposite to the surface that was ground during the conveyance process on the first conveyance side 20 is ground. becomes. As a result, both the front and back surfaces of the workpiece W are ground, and the workpiece W is ground from the tip of the conveyance side 22 to the chute 34.
It slides down and is ejected from the device. The white arrows in FIG. 1 indicate a series of flows of such a workpiece W.

Here, the front and back automatic grinding device of this embodiment is configured to transport the workpiece W, which has been ground on one side, to the upstream side of the grinding machine 24 by the reverse conveyor 60 or the like, so that
Since the grinding machine 24 is used to grind both the front and back sides, it requires a reverse conveyor 60, a reversing conveyor 36, etc., but it can grind both the front and back sides with almost the same equipment as a single-sided grinding machine. Compared to the conventional case where two grinding machines are used side by side, the machine can be constructed more compactly and the installation space can be significantly reduced.

Further, in this embodiment, since the work W is turned upside down by the reversing conveyor 36, by continuously rotating the reversing conveyor 36, the work W can be turned over continuously and efficiently. Compared to the above-mentioned reversing devices 120 and 136, which wait for the arrival of the workpiece W and intermittently reverse the workpiece, there is no need for a sensor to detect the workpiece W, making control easier. The flow of W becomes smooth. In particular, in this embodiment, since the workpiece W is continuously fed by the sideways conveyor 44, the reverse conveyor 60, and the rotating disk 70, the workpiece W can be smoothly reversed by the reversing conveyor 36. By doing so, the throughput of the entire grinding machine is greatly improved.

Further, as described above, the workpiece W is attracted and reversed by the reversing conveyor 36, and the workpiece W is placed and transported by the sideways conveyor 44, the reverse conveyor 60, and the rotating disk 70. Therefore, there are fewer restrictions due to the shape and thickness of the workpiece W, and there is an advantage that a single device can grind a plurality of types of workpieces W.

In addition, in this embodiment, the horizontal flow conveyor 4
4, a return conveyor 60 and a rotating disk 70 constitute a return device. Further, although only one workpiece W is illustrated in FIG. 1, in reality, a large number of workpieces W are continuously fed.

Although one embodiment of the present invention has been described above in detail based on the drawings, the present invention can also be implemented in other embodiments.

For example, in the embodiment described above, the reversing conveyor 36 is disposed at the downstream end of the transport conveyor 10 to reverse the workpiece W. It is also possible to arrange a reversing device in the part where the workpiece W is transferred. Note that the reversing device includes not only the reversing conveyor 36 described above but also the reversing conveyor 36 described above.
Conventional inverting device 120, 136 shown in the figure
It is also possible to adopt other formats.

Further, in the embodiment described above, the work W is placed on the horizontal conveyor 44, the reverse conveyor 60, and the rotary disk 70 and sent back to the upstream side of the transport conveyor 10. It is also possible to send back the work W using a return device.

Further, the grinding machine 24 of the above embodiment has a grinding belt 2
Although the upper surface of the workpiece W is ground by the grinder 8, other types of grinding machines such as those using a rotary grindstone may also be used.

Further, a partition plate 18 is provided on the upstream side of the conveyor 10 of the embodiment, and the chute 3
Grooves 2, 34, and 58 are formed, and although it is desirable to have them warm, they are not necessarily necessary.

Although no other examples are given, the present invention can be implemented with various modifications and improvements based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing an automatic grinding device for front and back surfaces of a plate-like workpiece, which is an embodiment of the present invention. 2 is a front view of the apparatus of FIG. 1; FIG. FIG. 3 is a - sectional view in FIG. 1. Figure 4 is the third
It is an enlarged view of the reversing conveyor part in a figure. FIG. 5 is a diagram illustrating an example of a conventional front and back automatic grinding device. FIG. 6 is a diagram illustrating the operation of the reversing device shown in FIG. 5. FIG. 7 is a diagram illustrating another example of a reversing device in a conventional front and back automatic grinding device. 10... Conveyor conveyor, 20... First conveyance side,
22...First conveyance side, 24...Grinding machine, 36...
Reversing conveyor (reversing device), 44... sideways conveyor, 60... reverse conveyor, 70... rotating disk, W... plate-shaped work.

Claims (1)

[Claims for Utility Model Registration] (1) A front and back automatic grinding device for automatically grinding the front and back surfaces of a plate-shaped workpiece, which has a width dimension that allows two of the plate-shaped workpieces to be placed in parallel. 2 on the first conveyance side and the second conveyance side.
a conveyor that conveys the plate-like works in rows; a grinder that is disposed on the conveyance path of the conveyor and grinds the upper surface of each of the plate-like works that are conveyed in the two rows; and the conveyor. In order to place the plate-shaped workpiece, which has been conveyed on the first conveyance side and whose upper surface has been ground by the grinder, on the first conveyance side of the conveyor in order to grind the opposite surface, a return device that sends the work back to the upstream side of the grinder in the conveyance direction; and a return device that is disposed at one of two transfer positions where the plate-shaped work is transferred between the conveyor and the return device, and the plate-shaped work is 1. An automatic grinding device for front and back surfaces of a plate-like workpiece, characterized by having a reversing device for reversing the workpiece upside down. (2) The reversing device includes a pair of rolls provided substantially horizontally, and an endless belt that is wound around the pair of rolls and driven to rotate,
Of the pair of rolls, the roll on the side on which the endless belt rotates downward is made of a magnet, and the plate-shaped work is a material that is attracted to the roll made of the magnet. The apparatus for automatically grinding the front and back surfaces of a plate-shaped workpiece according to claim 1, which is a device made of a metal material, which is placed on the endless belt and rotated around the magnet to be turned upside down. .