Workpiece rotation device and laser processing system

Abstract

To provide a workpiece rotation device capable of improving mass productivity of a laser processed product in a laser processing system.SOLUTION: A workpiece rotation device 20 is composed of a first roll 23, a second roll 24 and a drive part 25. A workpiece O is placed on the first roll 23 and the second roll 24. The workpiece O is temporarily held at a gap S. The gap S is formed by the first roll 23 and the second roll 24. A gravity action line of the workpiece O passes through the gap S. The first roll 23 rotates in a first direction d1. The second roll 24 rotates in a second direction d2. The second direction d2 aligns with the first direction d1.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a workpiece rotating device and a laser processing system. [Background technology]

[0002] In recent years, the demand for dried foods has been increasing. One of the reasons for this is the diversification of eating habits. In particular, the demand for dried vegetables and dried fruits is steadily increasing. The demand for tomatoes is expected to grow significantly because tomatoes are one of the most widely consumed vegetables. Because it is one of those things. On the other hand, dried foods can help to reduce food waste. Under the SDGs, the challenge facing agricultural producers is how to utilize non-standard agricultural products. Currently, many agricultural products that do not meet the standards are disposed of.

[0003] Under such circumstances, many food drying technologies have been developed. The method for producing dried tomatoes is described below. The characteristics of the product are texture, flavor, appearance, and the ease of production. As a result, part of the cuticle layer is burned off, and moisture is efficiently released from there. Also, the formation of a baking surface means that almost no juice escapes. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5280380 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to improve the mass productivity of laser processed products. [Means for solving the problem]

[0006] Based on the above, the inventors of the present application have conducted extensive research and found that the drag force acting line on the workpiece and The problem is that the workpiece is prone to rolling due to the misalignment of the workpiece and the line of gravity. The present invention is defined as follows.

[0007] <Workpiece Rotation Device (1)> The workpiece rotation device has at least a plurality of drag forces. The positions of the reaction force acting points are different, so The line of gravity is the line of gravity of the workpiece. The point located is at least one of the plurality of reaction force action points.

[0008] <Laser processing system (1)> A laser processing system is composed of at least The laser irradiation device has a laser irradiation device and a workpiece rotation device. The workpiece rotating device is provided below the laser irradiation unit. The workpiece rotating device has at least a plurality of reaction force application points and rotational force application points. The positions of the plurality of reaction force action points are separated, and the separation is a point where the reaction force action of the workpiece is The line is located at or near the point of application of the rotational force. At least one of the force application points.

[0009] <Workpiece Rotation Device (2)> The workpiece rotation device is composed of at least the first rotor. The first roll rotates in a first direction. The first roll is disposed in a horizontal direction relative to the second roll. The second direction is the direction in which the ball rotates. The second direction corresponds to the first direction. It is in the direction.

[0010] <Laser processing system (2)> A laser processing system is composed of at least The laser irradiation device has a laser irradiation device and a workpiece rotation device. The workpiece rotating device is provided below the laser irradiation unit. The workpiece rotating device includes at least a first roll and a second roll. The first roll rotates in a first direction parallel to the second roll. The first roll is disposed on the second roller. The second roll rotates on the second roller. It is the first direction that coincides with the second direction. Effect of the Invention

[0011] The present invention makes it possible to improve the mass production of laser processed products. If the product is both laser irradiated and dried, the productivity of such dried foods is improved. [Brief description of the drawings]

[0012] [Figure 1] This is the concept of the present invention, (a) the relationship between the point of application and the force on the XZ plane, and (b) the relationship between the point of application and the force on the XY plane. [Diagram 2] FIG. 1 is a front view of the configuration of a laser processing system. [Diagram 3] FIG. 2 is a top view of the configuration of the workpiece rotating device. [Figure 4] FIG. 2 is a left side view of the configuration of the workpiece rotating device. [Diagram 5] FIG. 2 is a right side view of the configuration of the workpiece rotating device. [Figure 6] 1 is a rear view of the configuration of a workpiece rotating device. FIG. [Figure 7] FIG. 2 is a front view of the configuration of the workpiece rotating device. [Figure 8] 4 is a side view (side view) of the configuration of the second roll. [Figure 9] The rotation of the workpiece: (a) rotational motion on a helical groove, and (b) rotational motion on a helical blade. [Figure 10] 4 is a partially enlarged front view (partially enlarged front view) of the configuration of the second roll. [Figure 11] 1 is a partially enlarged perspective view of the configuration of a second roll as viewed obliquely from the side (partially enlarged perspective view). [Figure 12] 13 is a partially enlarged front view (partially enlarged front view) of the configuration of a modified second roll. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] <Concept of the present invention> Figure 1 shows the concept of the present invention. is the workpiece O. While being irradiated with the laser, the workpiece O moves through space. This space is defined by three mutually perpendicular axes (X-axis, Y-axis, and Z-axis). Figure 1(a) shows the relationship between the point of application and the force on the XZ plane. The forces acting on the axis are at least gravity Fg, resistance forces N1 and N2, and rotational force Fr. Here, the horizontal plane is the X-axis and the Y-axis, and the vertical line is the Z-axis.

[0014] Gravity Fg acts on each point of the workpiece, including the weight of the workpiece. In the following description, the line of action of gravity of the workpiece O is the line of action of gravity Fg. The starting point of this axis is the center of gravity G. The reaction force N1 acts or is acted on at a reaction force acting point P1. The reaction force acting point P2 acts on or is acted upon by the reaction force. P1 and P2 are separated, and the separation point is the line of action of gravity of the workpiece O. In other words, In other words, the workpiece O is supported by a point other than the point directly under its center of gravity G. If the point of action of the reaction force is If the workpiece O is directly under the center of gravity G, it is difficult for the workpiece O to rotate. Directly below is an air gap.

[0015] The rotational force acts or is acted on at the rotational force application point P3. 3 or located in the vicinity of the plurality of drag action points N1 and N2. At least one point. When the rotational force is applied, the workpiece O repeatedly turns upside down. Figure 1(b) shows the relationship between the points of application and the forces on the XY plane. The force acting on the horizontal plane is the conveying force Fm and the standing force Fp. are the X-axis and Y-axis. The vertical line corresponds to the Z-axis.

[0016] The conveying force Fm acts or is acted on at a conveying force acting point P4. When this force acts on the workpiece O, the workpiece O moves in a direction generally parallel to the positive direction of the Y axis. The standing force Fp acts or is acted on at a standing force acting point P5. When this force acts, the workpiece O rolls over. Based on the above, the structure of the workpiece rotating device will be explained conceptually as follows: are a plurality of reaction force acting points P1 and P2, and a rotational force acting point P3. The positions of P1 and P2 are separated, and the separation is the line of gravity of the workpiece. Of the reaction force action points P1 and P2, those that coincide with the action point P3 or are located in the vicinity thereof are At least one of the following is true.

[0017] <Workpiece> The workpiece is a tangible object whose shape is fixed and which can be processed. In this embodiment, the workpiece O is a food product having cuticle on its surface. Examples of processed material O include fruits and vegetables. Examples of fruits include persimmons, apples, pears, lemons, and mandarin oranges. Examples of vegetables include tomatoes, eggplants, zucchini, bell pepper, cucumber, etc. Incorporated herein by reference are: This is the content of Patent Publication No. 5280380.

[0018] <Laser processing system> Figure 2 shows the configuration of the laser processing system as viewed from the front. The object to be laser-processed by the laser processing system 1 is a workpiece O. The machining system 1 includes a laser irradiation device 10 and a workpiece rotation device 20.

[0019] <Laser irradiation device> The laser irradiation device 10 irradiates a laser. The device 10 has a laser irradiation unit 11. The laser irradiation unit 11 is located at a position Above the workpiece rotating device 20. In other words, the workpiece rotating device 20 is provided is below the laser irradiation unit 11. The laser irradiation unit 11 is composed of one or more irradiation sources (not shown). The position of the laser beam may be variable or fixed. The direction of the laser beam may be variable or fixed. Incorporated herein for reference in describing the morphisms is Japanese Patent No. 5280380. This is the content of the publication.

[0020] <Workpiece Rotation Device> Figure 3 shows the structure of the workpiece rotation device as viewed from above. The workpiece rotating device 20 is configured by a base portion 21, a pair of pillar portions 22a and 22b, a first The first roll 23, the second roll 24, and the drive unit 25. The workpiece O is placed on The first roll 23 and the second roll 24 face the bottom of the workpiece O. This is a gap S. The gap S is formed by the first roll 23 and the second roll 24. The line of gravity of the workpiece O passes through the gap S.

[0021] FIG. 4 shows the structure of the workpiece rotating device as viewed from the left side. The shafts 23a and 24a are provided in the column portion 22a. The rotating shaft 23a and the rotating shaft 24a are driven by a driving unit 25. FIG. 5 shows the right side view of the workpiece rotating device. The shafts 23a and 24a are attached to the column portion 22b. (not shown).

[0022] <Drive unit> As shown in FIG. 4, the drive unit 25 is made up of gears 25a, 25b, and c, a chain belt 25d, and a motor 25e. The gear 25b is attached to the rotating shaft 23a. The gear 25b is attached to the rotating shaft 24a. In addition to these, a gear 25c is attached to the column portion 22a. The gears 25a, 25b, and 25c are connected by a chain belt 25d. The rotational belt 25d is driven by a motor 25e. The first roll 23 and the second roll 24 are driven simultaneously by the drive unit 25 .

[0023] The number of rotations per unit time A (rpm) of the first roll 23 and the number of rotations per unit time The number of revolutions per hour B (rpm) can be set arbitrarily. If the relationship between the two is "A>B" Therefore, the conveying speed is slow and the rotation speed is fast, which makes it difficult for unevenness in the laser irradiation to occur.

[0024] <First Roll> The first roll 23 is required to have resistance to corrosion caused by laser. The laser emitted from the laser irradiation unit 11 reaches above the first roll 23. The first roll 23 may be made of a highly reflective material. However, depending on the laser conditions (wavelength, range, etc.), However, such corrosion resistance is not necessarily required.

[0025] As shown in FIG. 3, the workpiece O is supported by the peripheral surface 23b of the first roll 23. The peripheral surface 23b is a point on which the reaction force acts, and the reaction force is generated there. The workpiece O is supported whether or not the roll 23 rotates. FIG. 6 shows the configuration of the workpiece rotating device as viewed from the back. The workpiece O is rotated by the rotation force. The peripheral surface 23b has a rotation force acting point. The first roll 23 rotates in a first direction d 1. In contrast, the workpiece O rotates in the opposite direction to the first direction d1. .

[0026] <Second Roll> The second roll 24 is required to have resistance to corrosion caused by laser. The laser emitted from the laser irradiation unit 11 reaches above the second roll 24. The second roll 24 may be made of a highly reflective material. However, depending on the laser conditions (wavelength, range, etc.), However, such corrosion resistance is not necessarily required.

[0027] As shown in FIG. 3, the workpiece O is supported by the peripheral surface 24b of the second roll 24. The peripheral surface 24b is a point on which the reaction force acts, and the reaction force is generated there. The workpiece O is supported whether or not the rolls 24 are rotating. The workpiece O is transported by the second roll 24. The second roll 24 rotates. The direction in which the second direction d2 coincides with the direction in which the first direction d1 coincides with the ... first direction d1 coincides with the direction in which the first direction d1 coincides with the direction in which the second direction d2 coincides with the direction in which the first direction d1 That is, the first roll 23 and the second roll 24 rotate in the same direction. As shown in FIG. 1, the rotation axis 2 of the second roll 24 is approximately parallel to the conveying direction d3 of the workpiece O. The direction is 4a. In other words, the rotational force is converted into a linear force (transport force). .

[0028] FIG. 7 shows a front view of the configuration of the workpiece rotating device. The helical groove 24c is formed on the peripheral surface 24b of the conveyor 24. This is the force application point, and what is generated there is a conveying force. This conveying force acts on the workpiece. That is, when the rotation direction of the second roll 24 is d2, the movement of the workpiece O is The direction is d3.

[0029] FIG. 8 shows the configuration of the second roll as viewed from the side. Further formed on the surface 24b is a spiral blade 24d. The helical blade 24d is formed of a helical rib 23c. The height H of the helical blade 24d is a predetermined value. For example, the distance is 1 cm to 7 cm. When the shape of the workpiece O is non-spherical, the spiral blade The formation interval (pitch) of the roots 24d is larger than the width of the workpiece O in the short direction. This allows the vehicle to maintain the rollover state described below.

[0030] Figure 9 shows the rotation of the workpiece. If the workpiece O is a tomato, the rotation When a force is applied, the tomato will stand upside down. Even if the tomato falls over, it will only be a temporary In other words, the tomato's head or bottom tries to stay in place because The direction is vertical. The direction of the head or bottom of the tomato (hereafter referred to as the axis direction) is changed to a horizontal direction. In terms of direction, the axial direction returns to the vertical direction.

[0031] FIG. 9(a) shows the rotational motion of the helical rib 23c. The tomato is in an inverted state because the height (mountain) of the spiral ridge 23c is small. In this case, the laser is irradiated only around the head or bottom of the tomato. FIG. 9(b) shows the rotational motion of the helical blade 24d. The tomato is in a rolled-over state because the height (peak) of the spiral blade 24d is large. In this case, the laser is irradiated onto the peripheral side surface of the tomato.

[0032] In this embodiment, the spiral rib 24c and the spiral blade 24d are formed on the laser. In other words, the laser emitted by the laser irradiation unit 11 reaches Above the helical ribs 24c and the helical blades 24d. FIG. 10 shows a partially enlarged front view of the configuration of the second roll. The roll 24 further includes a guide piece 24e formed on the peripheral surface 24b. The boundary between the spiral rib 24c and the spiral blade 24d is formed. The direction in which the helical ribs 24c or the helical blades 24d are formed intersects with the longitudinal direction.

[0033] The guide piece 24e is a point of action of the rolling force, and a standing force is generated there. The object on which this standing force acts is the workpiece O. In other words, the workpiece O is The side of the O faces up and down. FIG. 11 shows a partially enlarged and obliquely viewed side view of the configuration of the second roll. The height of the guide piece 24e is inclined. The height of the guide piece 24e is lower than the helical strip 24c side. This allows the workpiece O to roll smoothly.

[0034] FIG. 12 shows a partially enlarged front view of a modified configuration of the second roll. The guide piece 24e is formed at the boundary between the spiral rib 24c and the spiral blade 24d. The guide pieces 24e are partially adjacent to each other at the helical grooves 24c. However, the workpiece O rolls over smoothly. [Explanation of symbols]

[0035] 1 Laser processing system 10 Laser irradiation device 11 Laser irradiation section 20 Workpiece rotation device 23 First Roll 24 Second Roll 24b Peripheral surface 24c spiral strip 24d Spiral Blade 24e Guide 25 Drive unit d1 First direction d2 Second direction O Workpiece P1 Drag application point P2 Drag application point P3 Rotational force application point

Claims

1. A workpiece rotating device comprising at least: A first roll: it rotates in a first direction, and A second roll, arranged horizontally to the first roll, and It rotates in a second direction and coincides with the first direction, and further includes a helical groove and a helical blade formed on the circumferential surface of the second roll.

2. 2. The apparatus of claim 1, Formed between the first roll and the second roll is an air gap.

3. The apparatus of claim 2, Further formed on the peripheral surface is a guide piece, which is formed at the boundary portion between the spiral rib and the spiral blade.

4. The apparatus of claim 3, The direction in which the helical rib or the helical blade is formed intersects with the longitudinal direction of the guide piece.

5. 5. An apparatus according to any one of claims 1 to 4, comprising: The number of rotations per unit time of the first roll is greater than the number of rotations per unit time of the second roll.

6. The apparatus of any one of claims 1 to 5, further comprising: Drive section: This simultaneously drives the first roll and the second roll.

7. A laser processing system comprising at least the following: Laser irradiation device: This has a laser irradiation unit, and A workpiece rotating device is provided below the laser irradiation section and comprises at least the following: A first roll: it rotates in a first direction, and a second roll, disposed horizontally to said first roll, and It rotates in a second direction, which coincides with the first direction, and further, formed on the circumferential surface of the second roll are helical grooves and helical blades.

8. The system of claim 7, Formed between the first roll and the second roll is an air gap.

9. The system of claim 8, Further formed on the peripheral surface is a guide piece, which is formed at the boundary portion between the spiral rib and the spiral blade.

10. The system of claim 9, The direction in which the helical rib or the helical blade is formed intersects with the longitudinal direction of the guide piece.

11. The system of claim 9 or 10, The laser irradiation unit irradiates a laser, and the irradiation destination is above the helical strip and the helical blade.

12. A system according to any one of claims 8 to 11, The number of rotations per unit time of the first roll is greater than the number of rotations per unit time of the second roll.

13. A system according to any one of claims 8 to 12, wherein the workpiece rotating device comprises: In addition, Drive section: This simultaneously drives the first roll and the second roll.

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