JPS6338781Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a green onion peeling machine that removes the aged skin covering the white roots of long onions by jetting high-pressure air.

In a green onion peeler that removes the aged skin covering the white roots of green onions by jetting high-pressure air, high-pressure air is automatically released from the nozzle when the green onion is placed on the green onion stand. The structure is such that the injection of high-pressure air stops when the onion is removed.

By the way, this type of conventional green onion peeling machine is equipped with a photoelectric sensor and a foot switch on the platform to detect the presence or absence of green onions. The skin, roots, soil, etc. of the plants scatter and become dirty, so the photoelectric sensor installed on the platform also gets dirty very easily.
This is the biggest cause of frequent malfunctions.

The present invention aims to eliminate the drawbacks in view of the conventional situation as described above.
A weight sensor that detects changes in the weight of the onion is installed under the onion stand, and a control device is installed that injects high-pressure air from the high-pressure air supply device when the weight sensor detects an increase in the weight of the onion stand. To provide a green onion peeling machine that can reliably detect the presence or absence of green onions on a table and accurately control the injection of high-pressure air without being affected by dirt on the table. It is something.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a stand for placing green onions, and this stand 1 is horizontally supported on a base 3 via a plurality of elastic members 2 that support it so as to be movable up and down. A load cell 4 is provided below the platform 1 and between it and the base 3. The above platform 1 has an open end face and a top face on the green onion supply side A, and an open end face on the discharge side B of peeled skins, etc., and the load cell 4 detects changes in the weight of the platform 1. It converts the signal into an electrical signal. Reference numeral 5 denotes a pair of left and right nozzles that inject high-pressure air.
It is fixed to and protrudes upward from the bottom surface of the platform 1. Note that the vertical pipe of the nozzle 5 and the bottom of the platform 1 are in sliding contact with each other, so that the vertical pipe of the nozzle 5 and the bottom of the platform 1
vertical movement is not obstructed.

FIG. 3 shows a circuit for an automatic control device for high-pressure air injected from the nozzle 5 in the onion peeler constructed as described above. That is, 6 is an air compressor, 7 is a filter, 8 is an air pressure regulator, 9 is its pressure meter, and 10 is a solenoid valve, and these and the nozzle 5 constitute a high-pressure air supply device. . From the air compressor 6 to the filter 7, the air pressure regulator 8, and the solenoid valve 1
High-pressure air is supplied to the nozzle 5 through the nozzle 5, and the high-pressure air is controlled to be injected from the nozzle 5 and stopped by opening and closing the solenoid valve 10. On the other hand, 11 is a bridge circuit for detecting the electric signal of the load cell 4, 12 is an amplifier, and 13
14 is a comparator, 14 is an amplifier, and 15 is a relay. The electrical signal from the load cell 4 is amplified by the amplifier 12 and then input to the comparator 13. The output, which is compared with the reference voltage of the circuit, is sent to the amplifier 14. The circuit configuration is such that the output is amplified and the relay 15 is excited. 16 is a driving power source for the electromagnetic valve 10, 17 is a detection power source for the bridge circuit 11, and 18 is a reference voltage setting power source for the comparator 13. Reference numeral 19 denotes a normally open contact of the relay 15, and this normally open contact 19 is connected in series to the circuit of the solenoid valve 10 and its driving power source 16. When opened, high pressure air is injected from the nozzle 5, and when the platform 1 returns to its original weight, the injection stops.

To peel green onions using the green onion peeling machine configured as described above, insert green onion a into the green onion supply side A of mounting table 1 with the root side first. , if it is placed between the left and right nozzles 5 on the platform 1, the weight of the green onion a will be added to the weight of the platform 1, and the load cell 4 will detect an increase in the weight of the platform 1, so the relay 15 will be activated. Energized, solenoid valve 10
opens and high pressure air is injected from the nozzle 5. Therefore, if you gradually pull the green onion a on the platform 1 toward you, high-pressure air will be injected at the boundary between the green leaf part and the white root part, and it will gradually reach the root part, so that the aged epidermis covering the white root part will be removed. It is peeled off and blown out to the discharge side B of the platform 1. If you remove the long onion a from the top of the table 1,
Since the weight of the platform 1 returns to its original value, the relay 15 is de-energized as described above, its contact 19 opens, the solenoid valve 10 closes, and the injection of high-pressure air from the nozzle 5 is automatically stopped.

Note that if the reference voltage in the comparator 13 is set to generate a comparison output on the condition that the load cell 4 detects a weight increase exceeding a certain value, the presence or absence of the green onion a on the platform 1 can be detected. This can be detected reliably, and malfunctions due to a slight increase in the weight of the platform 1 can be prevented.

By the way, the load cell 4 that detects the presence or absence of a long onion a on the platform 1 by converting it into an electric signal,
Since it is installed under the platform 1, even if the top of the platform 1 gets dirty during work, the load cell 4 will not be affected by it at all and will perform accurate high-pressure air injection control over a long period of time. be able to.

As is clear from the description of the embodiments above, the green onion peeling machine according to the present invention includes a green onion stand,
A high-pressure air supply device is provided for injecting high-pressure air onto the green onions on this platform, and a weight sensor is provided below the platform to detect changes in the weight of the onions. Since it is equipped with a control device that injects high-pressure air from a high-pressure air supply device, it can reliably detect the presence or absence of green onions on the platform without being affected by dirt on the platform during work. This has the effect of accurately controlling the ejection of high-pressure air.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a plan view of the main parts, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a circuit diagram of the control device. 1...Long onion stand, 2...Elastic member, 3...
... Base, 4 ... Load cell, 5 ... A pair of left and right nozzles that inject high-pressure air, 6 ... Air compressor,
10...Solenoid valve, 12, 14...Amplifier, 13...
... Comparator, 15 ... Relay, 18 ... Comparator 13
Power supply for setting the reference voltage of 19... Normally open contact of relay 15.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A platform for placing green onions, and a high-pressure air supply device that injects high-pressure air onto the green onions on this platform,
A weight sensor is provided below the platform to detect a change in the weight of the platform, and a control device is provided to inject high-pressure air from the high-pressure air supply device when the weight sensor detects an increase in the weight of the platform. A green onion peeler. (2) The weight sensor installed under the green onion stand is a load cell that converts the weight into an electrical signal, and the control device activates the high voltage when the load cell detects an increase in weight exceeding a certain value. A green onion peeling machine according to claim 1, which is characterized in that the machine performs a control operation to inject air.