JP2000060516A - Device for processing onion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an onion-processing device capable of automatically cutting the roots of an anion only by setting the onion to a prescribed place and thereby capable of reducing the labors of a worker and improving the efficiency of works by forming the device in a specific structure. SOLUTION: This onion-processing device is provided with a brushing means for brushing up the root group C of an onion A from the periphery, a brushing means-driving source for driving the brushing means, a cutting tool 44, such as scissors, for cutting the base portion of the brushed root group in such a posture as nipping the base portion, and a cutting tool-driving source for driving the cutting tool 44. Therein, the brushing means comprises plural rotary rolls 21, 23 collected so that the outer peripheries of the rolls surround the base portion of the root group C of the onion A, and the rotary rolls comprise rotary brushes whose peripheries are flocked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an onion processing device for cutting onion roots before shipping.

[0002]

2. Description of the Related Art Onions are used as ingredients for various dishes, but the harvested onions are edible portions called bulbs that have grown into a substantially spherical shape, and stems extending from the upper end and lower ends of the stems. It has many thin roots that extend. Although this onion is exposed to warm dry air, the stems and roots are cut and shipped.
Conventionally, the roots and the like have been cut manually by using scissors.

[0003]

However, when the root is manually cut as described above, the arm is heavily fatigued and it is difficult to continue the work for a long time. Moreover, since the dried root group extends radially from one end of the bulb, it is necessary to cut the root group while rotating the entire onion, and skill is required for the quick cutting work.

The present invention has been made in view of the above point, and the roots are automatically cut only by setting an onion at a predetermined position, thereby reducing the labor of the operator and improving the working efficiency. The task is to achieve it. * 1

[0005]

[Means for Solving the Problems] The solution means of the present invention taken to solve the above-mentioned problems are as follows: "Scraping means for scraping the root group of onion from the surroundings, and scraping means for driving the scraping means. And a cutting tool that cuts the root end of the scraped root group so as to sandwich it, and a cutting tool drive source that drives the cutting tool ”.

The above means operates as follows. When the onion is set so that the root group of the onion is located in a portion that can be treated by the scraping means, the scraping means driven by the scraping means driving source is a drying method that extends radially from one end of the bulb of the onion. Scrap the roots that have been picked up from the surrounding area. As a result, the base end of the root group is erected.

Next, when the root group is erected, the cutting tool drive source is operated to operate the cutting tool. As a result, the base end portion of the root group in the upright state is cut by the cutting tool.

[0008]

The present invention has the following unique effects. By simply setting the onion so that the root group of the onion is located in a portion that can be treated by the scraping means, the root group is cut,
As mentioned above, there is no need to manually cut the root group,
The labor of the operator can be reduced. Further, since the manual work requiring skill is not required, the work efficiency is improved. <Others> * 2 As a specific configuration of the scraping means, “the scraping means is composed of a plurality of rotating rolls whose outer periphery is gathered so as to surround the base end of the root group of the onion. 』\ Can be adopted. In this structure, the rotating rolls whose outer periphery is gathered so as to surround the base end portion of the root group are rotated by the scraping drive source, and the root group of the onion is scraped up from the bulb by the rotating roll. * 3 As the rotating roll, it is also possible to adopt one having an outer peripheral surface made of sponge or elastic rubber,
If "the rotating roll is a rotating brush having bristles planted on the outer circumference", the root is caught on the brush surface and the brush is efficiently scraped up.

* 4 In the item 2 or 3 above, "The rotating roll has an outer peripheral lacking portion in which the distance from the rotation shaft to the outer periphery is shorter than other portions, and the scraping means described above is used. A sensor that detects that the onion has been set at a position where the root group can be processed, and in response to the detection signal of the sensor, the drive source for the scraping means is operated to cause the outer peripheral lacking portion to face the bulb of the onion. And a second control means for applying an operation signal to the cutting tool drive source after the scratching means drive source is stopped. Then, when the root group is set to a position where it can be processed by the scraping means, the drive signal for the scraping means is temporarily activated by the detection signal output from the sensor. That is, when the root group is scraped up and the outer peripheral lacking portion (the portion having a shorter radius than other portions) of the outer circumference of the rotating roll faces the bulb, the rotating roll constituting the scraping means stops. Therefore, when the roll is stopped, the distance between the outer peripheral lacking portion having a short outer radius of the rotating roll and the bulb of the onion becomes large, and a wide space is formed between them. Then, the cutting tool can be operated in this wide space. That is, a wide space can be secured between the scraping means and the bulb so that a large cutting tool can be operated so as to surely cut the root group once. Then, in this state, the cutting tool drive source is actuated by the actuation signal output from the second control means, whereby the root group is cut by the cutting tool.

* 5 In the above items 1 to 4, "The cutting tool drive source causes the cutting tool to enter the space from a retracted position away from the space between the scraping means and the bulb. When the root group is scraped up, the cutting tool is retracted to a retracted position away from the vicinity of the root group, so that the cutting tool scrapes up the root group. Will not get in the way.

* 6 In the above items 1 to 5, "at a portion facing the scraping means from the onion-setting side, a direction perpendicular to a direction in which the root group is scraped by the scraping means. Is provided with an onion contact plate formed so that the stem insertion slit extending to one end is open at one end, and the onion is opposed to the scraping means in a state where the stem of the onion is inserted into the stem insertion slit. A stem cutting sensor that detects that the stem has been set in a section, and a stem cutting tool that operates in response to a detection signal from the stem cutting sensor and that cuts the stem protruding from the slit so as to sandwich it. The sensor that outputs a signal for operating the upper means is for detecting the onion that has moved from the onion contact plate to the scraping means side '', and in the series of continuous work with the root of the onion. The stem can be cut.

That is, when a stem of an onion is inserted into a slit formed in the onion contact plate and the onion is moved to a position opposite to the scraping means, a detection signal from the stem cutting sensor is output at this time. The stem cutting tool is actuated by this, and thereby the stem protruding from the onion contact plate is cut. Next, when the onion is moved to the scraping means side, the rotary roll constituting the scraping means starts to operate by the output of the sensor detecting the onion, and the root group is cut as described above.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. 1 is a sectional view of an onion processing device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. A rectangular plate-shaped bottom plate (11) and a top plate facing each other vertically
The four corners of (12) are connected by struts (14a) to (14c), and the root cutting part (40) for cutting the root of the onion is near the top plate (12).
Is provided, and a stem cutting part (60) for cutting the stem is provided below it.

The details of each unit will be described below. [Root cutting part (40)] The root cutting part (40) drives the scraping means composed of rotating brushes (21) (22) (23) (24) for scraping the roots from the bulbs. A brush motor (26) that is a drive source for the scraping means, a scissors (44) that is a cutting tool that cuts the base end of the scraped root group, and a motor that is a cutting tool drive source that drives this (44). 47) and the like, and an onion detecting device for detecting that the onion is set at a predetermined position.

As to the scraping means, as shown in FIGS. 1 to 3, in the vicinity of one corner of the top plate (12), four rotary brushes (21) as rotary rolls constituting the scraping means. (22) (23) (24) is provided,
Brush part (21a) (22a) of each rotating brush (21) (22) (23) (24)
(23a) (24a) are flocked radially on the rotating shafts (21b) (22b) (23b) (24b), and the flocking area is limited to the range of about 240 degrees as shown in Figs. Has been done. And
This non-flocked part (74) where no flocking is performed is the above-mentioned outer peripheral lacking part whose radius is shorter than that of the other parts. Further, the outer circumferences of the brush parts (21a) (22a) (23a) (24a) are in a butted state so as to surround the raking space (42) for approaching the root groups of the onion as shown in FIG.

Rotating shaft of the rotating brush (21) (22) (23) (24)
(21b) (22b) (23b) (24b) are connected via a plurality of bevel gears (25), and these are brush motors (26).
It is designed to be rotated by. * Onion detection device The onion detection device that detects that the root group has been set at the position where the root brush is scraped up is a lifting rod (51) whose lower end contacts the onion, and the lifting rod (51). It is composed of a tubular holder (52) which is held so as to be able to move up and down, and a limit switch (33) which is a sensor arranged at the upper end of the tubular holder (52). The limit switch (33) is attached to the tip of a lever (31) which is received from below by a support block (30) in the vicinity of its free end, and at the same time, the lever (3)
The base end portion of 1) is rotatably supported by a support shaft (35) so as to be vertically rotatable.

Further, as shown in FIGS. 1 and 2, the upper bending piece (37) of the standing plate (36) provided on the upper surface of the top plate (12) and the lever.
A compression spring (38) is interposed between the (31), and the lever (31) is pressed onto the support block (30) by the urging force of the compression spring (38). Further, a cam follower (32), which comes into contact with a reciprocating cam (71) described below from above, projects from a side portion of the lever (31).

* About cutting tools Scissors (44), which are cutting tools for cutting the root group, are horizontal plates (82) at the rear end of the motor (47), the base (19), the rod (55) and the scissors (44). (85)
It is adapted to be driven by a cutting tool drive source composed of contact parts (16a) (16b) and the like. Reciprocating cam already mentioned
The (71) moves in the opening (15) formed in the top plate (12), and the reciprocating cam (71) is fixed to the upper surface of the slider (18). The slider (18) is linearly moved by being guided by a guide rod (17) passing through the slider (18).

The slider (18) is attached to a base which is connected to the other end of a rod (55) whose one end is connected to the peripheral edge of the rotary disk (48) by a pin (49) with a pin (41). Along with
The rotating disk (48) is rotated by a motor (47). On the upper surface of the base (19), the rotating brushes (21) (2
2) Linear slit (130) that opens toward the (23) (24) side
A guide plate (13) formed with and a scissors (44) above it are arranged. This scissors (44), as shown in FIG.
(45) is provided with a pair of cutting blades (81) (84) rotatably coupled to each other, and the cutting blades (81) (84) are separated from each other on the coupling shaft (45) side end. The ends of the extending horizontal plates (82) (85) are scissors.
It is pulled by a tension spring (80) that biases (44) in the opening direction.

In front of the horizontal plates (82) (85) extending from the end of the scissors (44) on the side of the connecting shaft (45), there is a standing plate (10) standing on the bottom plate (11) of the instrument body. Fixed hits (16a) (16b) are provided. Therefore, the scissors (44) are the rotating brushes (21) (22).
When the horizontal plates (82) (85) at the base end hit the (16a) (16b) after moving to the (23) (24) side, as shown by the imaginary line in FIG. 4, the tension spring (80) Cutting blade of scissors (44) against the urging force of
(81) (84) closes, and conversely, when the scissors (44) retreat to the initial position shown by the solid line in the figure, the cutting blade is biased by the tension spring (80).
(81) and (84) are open. [Stem cutting part (60)] As shown in FIG. 2, the wall plate (62) installed between the bottom plate (11) and the top plate (12) which face each other in the vertical direction of the instrument main body has a The motor (63) is attached, and the slide shaft (67) is attached to the output end of the rod (66) which is connected to the outer periphery of the disk (64) attached to the output shaft by the connecting pin (65). It penetrates up and down. Then, the slide shaft (6
The upper end of 7) moves along a guide rail (77) having an inverted U-shaped cross section attached to the lower surface of the onion placing table (61) which is an onion contact plate. Two arms (68) and (69) are rotatably connected to the slide shaft (67), and the stems (68) and (69) are used to cut the stems (57), which are stem cutting tools. Are being driven.

The stem cutting scissors (57) is provided with a pair of cutting blades (58) (5) rotatably connected by a connecting shaft (50) as shown in FIG.
The horizontal plate (53) (54), which is provided with 9) and extends in the direction away from each other from the end of the cutting blades (58) (59) on the side of the connecting shaft (50), has the arm (68) described above. (69) is rotatably connected by pins (78) and (79). Further, the upper end of the coupling shaft (50) for rotatably coupling the cutting blades (58) (59) is inserted into the onion placing table (61) as shown in FIG.

The onion placing table (61) located above the stalk cutting scissors (57) has a stalk inserting slit (611) opened at one end thereof (rotating brushes (21) (22) as scraping means. ) (23) (24) extending in a direction perpendicular to the direction of scraping the root group) is formed, and the stem insertion slit (611)
A stem cutting sensor (612) is provided in the inner part of the.
In addition, the brush motor (26) and the motor (47) are attached to the instrument body.
A control device (not shown) for controlling the above in the order of FIG. 6 is provided. [Description of Operation] Next, the operation of the onion processing device according to the above embodiment will be described.

As shown by the phantom line in FIG. 2, the stem of the onion (A)
(B) is inserted into the stem insertion slit (611) of the onion placing table (61), and the stem (B) is applied to the stem cutting sensor (612) arranged at the back of the stem insertion slit (611). Upon contact, the stem cutting motor (63) starts to rotate by the signal from the stem cutting sensor (612). When the stem cutting motor (63) starts rotating from the state shown in FIG. 2, the slide shaft (67) attached to the output end of the rod (66).
Is guided by the guide rail (77) to move linearly toward the onion (A) side, and at the tip of the arm (68) (69) that is moved by being pushed by the slide shaft (67), the cutting blade (58) (59 ) Is rotated about the connecting shaft (50) so as to close. As a result, the stem (B) of the onion (A) is cut, and then the disc (64) is rotated to the initial position shown in FIG. 2 and stopped.

Next, when the onion (A) held in the hand is raised, the roots (C) (C) of the bulbs (B) of the onion (A) at the upper end of the bulb (C) (C) When the lifting rod (51) is lifted at the gathering part, the limit switch (33) that is a sensor is
N work. Then, a control device (not shown) operates to control each part in the order shown in FIG. That is, the limit switch
After confirming the ON signal of (33) in step (ST1), in step (ST2) the rotating brushes (21) (22) (23) (24) rotate n times (n is an integer) from the state of FIG. By rotating the brush motor (26), the non-flocked part (74) (74), which is the outer peripheral lacking part of the rotating brush (21) (22) (23) (24), causes the bulb (D) of the onion (A) to move. )
These are stopped in the state facing to. Then, as shown in FIG. 7, the roots (C) (C) of the onion (A) turn into the rotating brush (21).
(22) The rotation of (23) and (24) causes the bulb (D) to be scraped up. That is, the roots (C) (C) (C) (C) (C) (C) (C) on the outer peripheral rotation surface of the rotating brushes (21) (22) (23) (24) gathered so as to surround the group. ) The county is scraped away from the bulb (D). In addition, in order to stop the non-planted part (74) (74) of the rotating brush (21) (22) (23) (24) while facing the bulb (D) of the onion (A), for example, brush A servomotor may be used as the drive motor (26), and the servomotor may be rotated by a predetermined angle each time the root (C) (C) group is cut. In this case, the control device for rotating the servo motor by a predetermined angle corresponds to the above-mentioned first control means.

Next, after the rotating brushes (21) (22) (23) (24) have finished rotating, step (ST3) is executed,
In step 3), the motor (47) that is a component of the cutting tool drive source is rotated once. In this embodiment, the rotating brushes (21) (22)
(23) The functional unit that issues a command to drive the motor (47) after the rotation of (24) (the functional unit of the control device that executes step (ST3)) corresponds to the second control means. .

When the motor (47) starts to rotate, the rod (55) connected by the pin (49) moves to the outer circumference of the rotating disk (48) attached to the output shaft of the motor (47), and the slider is output at its output end. (18)
Moves to the rotating brush (21) (22) (23) (24) side. At this time, the slider (18) has a guide rod (17) passing through it.
The slider (1
The reciprocating cam (71) connected to the top surface of 8) is the cam follower (32).
Then, the lever (31) rotates upright about the support shaft (35). As a result, the lifting rod (51) that is in contact with the upper end of the onion (A) is lifted, and the lifting rod (51) is moved to the onion (A).
It is separated from above.

By continuing rotation of the motor (47), the slider
When (18) moves further toward the rotating brushes (21), (22), (23) and (24), the root of the onion (A) is inserted into the slit (130) of the guide plate (13).
(C) The proximal end of the (C) group is in an approaching state. Also, as shown by the imaginary line in FIG. 4, the horizontal plates (82) (85) at the base end of the scissors (44) are in contact.
The roots (C) and (C) are cut by the cutting blades (81) and (84) by abutting against (16a) and (16b). After that, the motor (4
When 7) rotates, the slider (18) returns to the initial position shown in FIG. 1 and the motor (47) stops. [Others] In the above embodiment, the rotating brush is used as the rotating roll.
(21) (22) (23) (24) was used, but the rotary shaft (21b) (22b) (2
3b) It is also possible to apply sponge or elastic rubber having a fan-shaped cross section perpendicular to the axis of (24b) instead of the brush parts (21a) to (24a). In the above embodiment, the rotating brush (21) (22) (23) (24)
The non-flocked part (74) (74) was formed on the non-flocked part (74) (74).
The outer peripheral surfaces of the rotating brushes (21), (22), (23) and (24) may be formed into a perfect cylindrical surface without forming the. In the above embodiment, the rotating brush (21) (22) (23) (24)
The motor (4) that is the drive source for the scissors (44) that cuts the root after stopping the
7) was made to operate automatically, but a manual switch for driving the scissors (44) was provided, and when the operator turned on the switch, the motor (47) operated and the scissors (44 ) May perform a disconnection operation. In the above embodiment, the scissors (44) for cutting the roots (C) (C)
The explanation was given for the case where the instrument body is installed and used with the posture above the stem cutting scissors (57) for cutting the stem (B), but it goes without saying that the instrument body can also be used by tilting it sideways. Yes. That is, even if the positional relationship between the scissors (44) for cutting the roots (C) (C) and the scissors for cutting the stem (57) is opposite to that described above, it should be arranged so that they are laterally opposed to each other. They may be provided, and the positional relationship between the two is not limited to that of the above-described embodiment as long as they are provided at the facing portion.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an onion processing device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view of rotating brushes (21) (22) (23) (24).

FIG. 4 is a plan view of the vicinity of the scissors (44).

FIG. 5 is a bottom view of an arrangement portion of scissors for cutting stems (57).

FIG. 6 is a flowchart of control operation for cutting the root (C) (C) group of the onion (A)

[Fig. 7] An explanatory view of the action of scratching the roots (C) (C) of the onion (A)

[Explanation of symbols]

(A) ・ ・ ・ Onion (C) ・ ・ ・ Root (21) (22) (23) (24) ・ ・ ・ Rotating brush (33) ... Sensor (44) ・ ・ ・ Scissors (57) ・ ・ ・ Scissors for cutting stems

[Procedure amendment]

[Submission date] November 4, 1999 (1999.11.
4)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

[Means for Solving the Problems] The solution means of the present invention taken to solve the above-mentioned problems are as follows: "Scraping means for scraping the root group of onion from the surroundings, and scraping means for driving the scraping means. In the onion processing device, a cutting tool that cuts the root end of the scraped root group so as to sandwich the root end, and a cutting tool drive source that drives the cutting tool. The upper means is composed of a plurality of rotating rolls whose outer periphery is gathered so as to surround the base end portion of the root group of the onion, and the rotating roll is a rotating brush having bristles planted on the outer periphery. ”

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

Next, when the root group is erected, the cutting tool drive source is operated to operate the cutting tool. As a result, the base end portion of the root group in the upright state is cut by the cutting tool. Further, the scraping means is composed of a plurality of rotating rolls whose outer periphery is gathered so as to surround the base end of the root group of onion, so that the outer periphery is gathered so as to surround the base end of the root group. The rotating roll is rotated by a scraping drive source, and the onion root group is scraped up from the bulb by the rotating roll. Also,
As the rotating roll, it is also possible to adopt one having an outer peripheral surface made of sponge or elastic rubber,
In the case of a rotating brush with bristles planted on the outer circumference, roots are caught on the brush surface and can be efficiently scraped up.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

[0008]

The present invention has the following unique effects. By simply setting the onion so that the root group of the onion is located in a portion that can be treated by the scraping means, the root group is cut,
As mentioned above, there is no need to manually cut the root group,
The labor of the operator can be reduced. Further, since the manual work requiring skill is not required, the work efficiency is improved.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

* 2 Item 1) In the above item 1, "The rotating roll has an outer peripheral lacking portion in which the distance from the rotating shaft to the outer periphery is shorter than other portions, and the root group is removed by the scraping means. An onion detection sensor that detects that the onion has been set at a position where it can be processed,
First control means for operating the scratching means drive source in response to the detection signal of the onion detection sensor, and stopping the scratching means drive source when the outer peripheral lacking portion faces the bulb of the onion; A second control means for applying an actuating signal to the cutting tool drive source after the scraping means drive source is stopped. ”, When the root group is set to a position where it can be processed by the scraping means. The drive signal for the scratching means is temporarily activated by the detection signal output from the onion detection sensor. That is,
When the root group is scraped up and an outer peripheral lacking portion (a portion having a shorter radius than other portions) of the outer circumference of the rotating roll faces the bulb, the rotating roll constituting the scraping means stops. Therefore, when the roll is stopped, the distance between the outer peripheral lacking portion having a short outer radius of the rotating roll and the bulb of the onion becomes large, and a wide space is formed between them. Then, the cutting tool can be operated in this wide space. That is, a wide space can be secured between the scraping means and the bulb so that a large cutting tool can be operated so as to surely cut the root group once. Then, in this state, the cutting tool drive source is actuated by the actuation signal output from the second control means, whereby the root group is cut by the cutting tool.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

* 3 In the item 1 or 2, "The cutting tool drive source causes the cutting tool to enter the space from a retracted position away from the space between the scraping means and the bulb. When the root group is scraped up, the cutting tool is retracted to a retracted position away from the vicinity of the root group, so that the cutting tool scrapes up the root group. Will not get in the way.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

* 4 In the item 2), "Stems extending in a direction perpendicular to the direction of picking up the root group by the scraping means at the portion facing the scraping means from the setting side of the onion. An onion contact plate formed so that the insertion slit is opened at one end is provided, and the onion is set in the facing portion of the scraping means in a state where the stalk of the onion is inserted into the stalk insertion slit. A stem cutting sensor that detects that the stem cutting sensor is operated, and a stem cutting tool that operates by a detection signal from the stem cutting sensor and cuts so as to sandwich the stem protruding from the slit, the onion detection sensor, , Which detects the onion that has moved from the onion contact plate to the scraping means side ", the root and stem of the onion can be cut by a series of continuous operations.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

That is, when a stem of an onion is inserted into a slit formed in the onion contact plate and the onion is moved to a position opposite to the scraping means, a detection signal from the stem cutting sensor is output at this time. The stem cutting tool is actuated by this, and thereby the stem protruding from the onion contact plate is cut. Next, when the onion is moved to the scraping means side, the output of the onion detecting sensor for detecting the onion starts to operate the rotary roll, and the root group is cut as described above.

Claims (6)

[Claims] 1. A raking means for raking the root group of an onion from the surroundings, a drive source for a raking means for driving the raking means, and cutting so as to sandwich the root end of the raked root group. And a cutting tool drive source that drives the cutting tool. 2. The onion processing device according to claim 1, wherein the scraping means is composed of a plurality of rotating rolls whose outer periphery is gathered so as to surround the base end portion of the root group of the onion. 3. The onion processing device according to claim 2, wherein the rotating roll is a rotating brush having bristles planted on the outer periphery thereof. 4. The rotating roll is provided with an outer peripheral lacking portion in which a distance from a rotation shaft to an outer periphery is shorter than other portions, and an onion is set at a position where the scraping means can process the root group. A sensor for detecting that, and in response to the detection signal of the sensor, the drive means for scratching means is operated to stop the drive source for scratching means when the outer peripheral lacking part faces the bulb of the onion. 4. The onion processing machine according to claim 2, further comprising a first control means and a second control means for applying an operation signal to the cutting tool drive source after the scraping means drive source is stopped. 5. The cutting tool drive source has a function of operating the cutting tool after the cutting tool is moved into the gap from a retracted position away from the gap between the scraping means and the bulb. Item 1. An onion processing device according to any one of items 1 to 4. 6. A stem insertion slit extending in a direction perpendicular to a direction in which the root group is picked up by the scraping means is opened at one end in a portion facing the scraping means from the onion setting side. The onion contact plate formed is provided, and for cutting the stem detecting that the onion is set in the facing portion of the scraping means in a state where the stem of the onion is inserted into the stem insertion slit. A sensor and a stem cutting tool that operates by a detection signal from the stem cutting sensor and cuts so as to sandwich the stem protruding from the slit, and outputs a signal for operating the scraping means. The onion processing device according to any one of claims 1 to 5, wherein the sensor detects an onion that has moved from the onion contact plate toward the scraping means.