JP2014233347A - Automatic lifting/lowering device of fried food and two layer-type fryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of eliminating oil mist and a fall prevention technique of a frying basket in the power failure, by paying attention to the fact that the oil mist generated from an oil tank is deposited on a sliding part of an exposing type automatic lifting/lowering device of fried food and solidified, and the sliding part may not function.SOLUTION: A method is characterized by: sealing components of an automatic lifting/lowering device of fried food; using a precision ball screw 24 in a sliding part of a lifting/lowering mechanism; mounting it in the vertical direction; and thereby eliminating the trouble due to the deposit of the oil mist. The precision ball screw is vertically mounted, and thereby the frying basket can be fixed at any position and the accident caused by the fall of the frying basket in the power failure is prevented. An oil tank is integrated in the device, so that overlapping functions and components are eliminated to avoid waste. The fryer is made to include these.

Description

          The present invention relates to an electric fryer, and more specifically, in a two-layer electric fryer in which oil is used in the upper part and water is provided in the lower part in an oil tank used when cooking fried foods, etc. Put the cooking ingredients in a deep-fried basket and place the deep-fried basket on an automatic lifting device. A device that sets the frying time, raises and lowers the fried basket in the high temperature oil layer in the oil tank, and cooks the fried food under automatic control.

    In the shape integrated with the two-layer fryer, the oil tank and the fried food automatic lifting device of the two-layer fryer are fixed on the upper surface of the oil tank via a round pipe. The fried food automatic lifting device is wired and automatically controlled via a control panel at the bottom of the oil tank and a round pipe. The wiring is not exposed around the two-layer fryer, which is considered for safety. An electric motor is used as the power for raising and lowering the deepening basket. The electric motor and the gear box are directly connected to each other. The gear box is eccentric at a right angle and directly connected to a ball screw to transmit power for raising and lowering the deepening basket. Furthermore, a slide guide was provided on both sides of the ball screw, and a slide plate for connecting the ball screw and the slide guide was provided in order to raise and lower the fried basket smoothly. A fried basket is hung on a fried basket hanging bracket fixed to a slide plate, and it is moved up and down in an oil tank to cook fried food. A fried food automatic lifting device that sets frying conditions and automatically raises and lowers the fried basket with the power of an electric motor.

    In the event of a power outage, the fried basket falls into a hot oil tank and is exposed to dangers such as fire and burns, so there is no brake function using electricity. The combination of the ball screw and gear box is fixed at any position. During a power outage, even if a 10 kg load is applied to the fried basket, the fried basket will not descend from the position where it was stopped. The fried basket does not fall into the hot oil reservoir and is exposed to the risk of oil splashes.

    The biggest drawback of the automatic lifting device exposed on the upper surface of the oil tank is that oil mist adheres and solidifies and the automatic lifting device stops functioning. There is an automatic lifting device in the upper part of the oil tank, and it is always exposed to oil mist. The oil mist adheres to the sliding part, solidifies, and the sliding part does not move. In the present invention, the electric motor and the gear box are hermetically sealed, and the ball screw for suspending and raising the fried basket is exposed, but the ball screw is used vertically, and the gap between the ball screw and the nut portion is 5 μm. Further, the present invention relates to a two-layer fryer technique that prevents the oil mist adhering to the screw portion from being swept out by a nut portion and solidified by changing the type of the ball screw to a precision ball screw. In this document, the term “oil tank” means a liquid containing container, and “oil layer” means an oil layer inside the core “oil tank”, and these are used properly.

          In general fryer used for deep-fried food, moisture is contained in impurities such as frying residue and drip generated from cooking materials during cooking, so when the water is heated to 100 ° C or higher, a steam explosion occurs. As a result, oil splash, oil mist, etc. are generated. The workplace environment is unfavorable for workers due to burns caused by oil splashes and respiratory problems due to inhalation of oil mist. If the frying work is automated, the frying work in front of the fryer will be less than 1/20 of the conventional working time just by installing and removing the frying basket. By automating, the fried food can be evenly fried without any individual differences.

          There are two main types of automatic lifting and lowering elevators for business use currently in use. There are a method of lifting the oil tank from the bottom and a method of lifting the oil tank from the top. Neither of them fits in the outline of a general fryer and protrudes from the back. There is no automatic lifting device integrated with the fryer body, which is a general business fryer that is lifted from the top of the oil tank. Since the lifting type has a frying basket lifting device at the top of the oil tank, oil splashes and oil mistakes generated from the oil tank adhere to the sliding part of the lifting device and solidify, so that the movement of the sliding part of the lifting device Becomes dull over time and eventually stops moving.

          There is a technology (see Reference 1) that uses a rack and pinion to decenter at a right angle using the power of an electric motor and suspends it at one point using a rack gear as an automatic lifting device that is exposed and lifted on the flyer top surface. It is a retrofitting type, and an automatic lifting device is fixed to the frame part of the fryer body from the outer surface with a tapping screw. The power source and the wiring of the control unit are separate from the control of the main body of the fryer, and the temperature control function overlaps in the fryer that controls the temperature of the cooking oil. Since it is not an integral type, there are functional difficulties in daily cleaning of the oil tank. Also in the installation area, it protrudes to the back, so there is an extra area on the back.

          There is no automatic lifting device that is integrated with the main body and fits in the outer dimensions of the fryer, with the lifting system exposed on the upper surface of the oil tank.

Japanese Patent No. 3840302

          The present invention is a general electric fryer with a mechanism part built into the fryer main body, and there is an automatic fried food lifting device that moves up and down from the upper surface of the fryer main body. Attention was paid to the exposed fried food automatic lifting device located on the top of the fryer main body, which was not obtained. The exposed type has a sliding device on the oil tank, and the oil mist generated during cooking adheres to the sliding part of the fried food automatic lifting device and becomes solid when solidified, causing a malfunction. By making the mechanism that does not interfere with sliding even if it adheres, it is possible to realize a mechanism that is superior to the built-in type and that has a load resistance of 5 kg or more. Usability is also improved.

      The deep-fried food automatic lifting device is composed of an electric motor, a gear part that is eccentric to 90 degrees, a gear part that is suspended and slid, and a metal fitting for hanging a fried basket. The electric motor has a good hermeticity, and the gear part that is eccentric to 90 degrees and the gear part that is suspended and slid are not affected by oil mist.

    Even if it is a general electric motor, it has a good sealing property and oil mist is not a problem. The gear part that is eccentric to 90 degrees is a sealed ball box that is integrally molded from the conventional exposed type, and the gear part that is used for the suspension / sliding part is a precision ball screw that is attached vertically and oil mist adheres to it. Also flowed down along the thread. The gap between the precision ball screw and the nut portion combined with it was set to 10 μm or less, and the oil mist remaining on the precision ball screw was scraped out by the nut portion so that the sliding was not affected.

    Precision ball screws used for sliding and suspension are generally used in positioning devices for machine tools. A precision ball screw is used vertically, and a load is applied by suspending a fried basket. No examples have been used with axial loads. In general, it is used for positioning devices in units of μm in combination with servo motors. The sliding part is used by reducing the load as much as possible with bearings.

      The precision ball screw is threaded into a spiral, has high surface accuracy, and when used vertically, the oil mist flows downward along the screw cut into the spiral. Only a thin film remains on the screw. The gap between the ball screw and the nut containing the steel ball is as narrow as 10 μm, and the oil mist coating adhered is scraped by the nut portion combined with the ball screw and does not affect the sliding.

      The angle of the screw part of the precision ball screw was set to 20 degrees or less with respect to the axial direction in order to fix the fried basket at an arbitrary position using the load applied vertically through the fried basket hanging bracket. When the lateral moment is reduced to 1/3 or less of the load applied from the vertical direction, the precision ball screw stops rotating and stops. The precision ball screw does not rotate even when a load is applied in the vertical direction. It can be fixed at any position. Even when there is a power failure, by using the angle of the screw part cut in the spiral at 20 degrees or less, the precision ball screw does not rotate even when a load is applied in the vertical direction when the electric motor stops. Even if the fried basket is moved up and down due to a power failure during cooking, the fried basket will not fall. Safety is dramatically improved.

    The oil mist sticking at the sliding portion, which could not be solved by the conventional method, can be solved by using the sealed gear box and the precision ball screw vertically. If the lead of the precision ball screw used vertically is made small and the angle of the screw part is set to 20 degrees or less with respect to the axial direction, when the electric motor stops, the rotational motion also stops and the precision ball screw is fixed at an arbitrary position. It does not rotate even with a load from the vertical direction.

      According to the fried food automatic lifting device and the two-layer fryer according to the present invention, a fried food automatic lifting device that is resistant to oil mist can be obtained by combining a sealing electric motor, a sealing gear box, and a precision ball screw. The electric motor is mounted horizontally with the gear box and is blown away by the attached oil mist centrifugal force, and does not enter the motor or gear box from the rotating shaft. The gear box and the precision ball screw mounted vertically fall along the screw part cut in a spiral shape, and are scraped out by the screw part, and the oil mist is not fixed to the precision ball screw.

      The fried food automatic lifting / lowering device and the two-layer fryer according to the present invention are accommodated within the outer dimensions of the oil tank at the upper part of the oil tank. Even if the oil tank is in close contact with the wall, the function of the fried food automatic lifting device is not affected. Compared with the built-in type, it is in a position where it can be seen, so maintenance is improved.

Conceptual diagram of fried food automatic lifting device built-in type two-layer fryer according to the present invention Configuration diagram of fried food automatic lifting device according to the present invention (A) Comparison table of whether or not the precision ball screw rotates according to the lead value of the precision ball screw with respect to the vertical load of the precision ball screw according to the present invention. (B) Conceptual diagram for the vertical load for the experiment of (a).

10 Double-layer fryer 11 Oil tank 19 Strut (round pipe)
20 Automatic Fried Object Lifting Device 21 Fried Basket Hanger 22 Electric Motor 23 Gear Box 24 Precision Ball Screw 25 Slide Guide Shaft 26 Slide Guide Connecting Plate 30 Fried Basket

      FIG. 1 is a conceptual diagram of a two-layer fryer with a built-in fried food automatic lifting device according to the present invention. On the two-layer fryer 10, there is a fried food automatic lifting device 20. The deep-fried food automatic lifting device 20 is fixed to the oil tank 11 by a support 19. Inside the double-layer fryer 10, loosen the 8 bolts fixing the column 19, disconnect the connector connected to the fried food automatic lifting device from the control board, and lift the fried food automatic lifting device 20 upward. The fried food automatic lifting / lowering device can also be separated from 11.

      FIG. 2 is a configuration diagram of a fried food automatic lifting / lowering device that forms the basis of the present invention. A sealed electric motor 22, a sealed gear box 23, and a precision ball screw 24 are directly connected to each other. When the electric motor 22 is rotated, it is displaced at a right angle by the gear box 23 and the ball screw 24 rotates. A slide guide connecting plate 26 connected to the nut portion of the precision ball screw 24 supports both sides with a slide guide shaft 25. When the precision ball screw 24 rotates, the slide guide connecting plate 26 moves up and down. The raised basket hook fixed to the slide guide connecting plate 26 moves in the same manner as the metal guide 21 slide guide connecting plate 26. When cooking ingredients are put in the fried basket, the fried basket is hung on the fried basket hanging bracket 21, and the start button of the auto lifter on the operation panel is pushed, the electric motor 22 rotates, and the fried basket descends in conjunction with the oil tank. No. 11 high temperature oil layer enters and the frying operation starts. When the set time ends, the electric motor 22 rotates in the reverse direction, the fried basket rises, the fried basket is separated from the high temperature oil layer, and the frying operation is completed.

FIG. 3A is a comparison table showing whether the precision ball screw 24 of the present invention is rotated at an arbitrary position by the lead of the ball screw. When the precision ball screw 24 is stationary and a load is applied from the vertical direction, the precision ball screw 24 does not rotate with respect to the load in the lead 2. With respect to the load in the vertical direction, the lead 4 rotates gently, and the lead 5 and lead 8 rotate smoothly. In order to fix at an arbitrary position, the lead of the precision ball screw 24 needs to be equal to or less than the lead 2.
(B) is a conceptual diagram with respect to the experimental value of (a). The fried basket 30 of the fried food automatic lifting device 20 is hung on the fried basket hanging bracket 21, the precision ball screw 24 is stopped, a load of 10 kg is applied to the fried basket 30, and the lead 2, lead 4, lead 5, lead 8 and precision ball screw 24 are applied. The movement of the precision ball screw 24 was confirmed. All but the lead 2 rotate.

Claims (2)

      In a two-layer fryer where cooking oil and water enter the cooking oil tank, an oil layer is placed on the top and a water layer is placed on the bottom due to the difference in specific gravity between the oil and water, and an electric heater is used as the heat source for heating the cooking oil. , A two-tank fryer with an integrated structure in which an automatic lifting device for fried foods is placed at the top of the oil tank. In the fried food automatic lifting device, when the electric motor arranged in the fried food automatic lifting device is rotated forward, the fried basket hanging bracket descends, the fried basket enters the high temperature oil layer in the oil tank, and the electric motor is rotated in the reverse direction. The fried basket hanging bracket rises and the fried basket comes out of the high temperature oil layer. A device that puts cooking ingredients in a fried basket, hangs them on a fried basket hanging bracket, rotates the electric motor forward and backward, sets frying conditions, and performs frying work with automatic control. The deep-fried food automatic lifting / lowering device includes a sealed electric motor, a sealed gear box, a precision ball screw, a slide guide shaft, a slide guide connecting plate, and a fried basket hanging bracket. The electric motor rotates forward and backward, displaces the rotating shaft of the electric motor by 90 degrees with a gear box, and transmits it to the precision ball screw. When the precision ball screw is set to lead ÷ screw diameter = tan 20 or less and combined with a gear box, the lifting cage hook is raised and lowered while the electric motor is stopped and fixed at an arbitrary position. The fried basket is fixed at the position where the electric motor is stopped without requiring an electric and mechanical brake mechanism. The same behavior occurs during a power failure. In order to prevent the oil mist from sticking, a precision ball screw was installed in the vertical direction so that the oil mist generated and adhered from the oil tank flows downward along the screw part cut in the spiral. The gap between the precision ball screw and the nut was narrowed, and the oil mist remaining on the precision ball screw was scraped off, preventing the sliding part from being obstructed by solidification of the oil mist. The fried food automatic lifting device and the two-tank flyer are integrated, and the lifting basket is moved up and down, and the angle of the screw part of the precision ball screw is set to 20 degrees or less, so that the electric basket stops at any position. It can be fixed with. The same applies to a power outage. A method of automatic lifting equipment that prevents fried baskets from falling into the high temperature oil reservoir and is resistant to oil mist generated from the oil tank. In a two-layer fryer where cooking oil and water enter the cooking oil tank, an oil layer is placed on the top and a water layer is placed on the bottom due to the difference in specific gravity between the oil and water, and an electric heater is used as the heat source for heating the cooking oil. , A two-tank fryer with an integrated structure in which an automatic lifting device for fried foods is placed at the top of the oil tank. In the fried food automatic lifting device, when the electric motor arranged in the fried food automatic lifting device is rotated forward, the fried basket hanging bracket descends, the fried basket enters the high temperature oil layer in the oil tank, and the electric motor is rotated in the reverse direction. The fried basket hanging bracket rises and the fried basket comes out of the high temperature oil layer. A device that puts cooking ingredients in a fried basket, hangs them on a fried basket hanging bracket, rotates the electric motor forward and backward, sets frying conditions, and performs frying work with automatic control. The deep-fried food automatic lifting / lowering device includes a sealed electric motor, a sealed gear box, a precision ball screw, a slide guide shaft, a slide guide connecting plate, and a fried basket hanging bracket. The electric motor rotates forward and backward, displaces the rotating shaft of the electric motor by 90 degrees with a gear box, and transmits it to the precision ball screw. When the precision ball screw is set to lead ÷ screw diameter = tan 20 or less and combined with a gear box, the lifting cage hook is raised and lowered while the electric motor is stopped and fixed at an arbitrary position. The fried basket is fixed at the position where the electric motor is stopped without requiring an electric and mechanical brake mechanism. The same behavior occurs during a power failure. In order to prevent the oil mist from sticking, a precision ball screw was installed in the vertical direction so that the oil mist generated and adhered from the oil tank flows downward along the screw part cut in the spiral. The gap between the precision ball screw and the nut was narrowed, and the oil mist remaining on the precision ball screw was scraped off, preventing the sliding part from being obstructed by solidification of the oil mist. The fried food automatic lifting device and the two-tank flyer are integrated, and the lifting basket is moved up and down, and the angle of the screw part of the precision ball screw is set to 20 degrees or less, so that the electric basket stops at any position. It can be fixed with. This is the same as during a power outage. A two-tank flyer that uses a fried food automatic lifting device that is resistant to oil mist generated from the oil tank and prevents the fried basket from falling into the high-temperature oil reservoir.