JP6444111B2 - Pressure fryer - Google Patents

Description

  The present invention relates to a pressure fryer that heats cooking oil in a state where an oil tank containing cooking oil is sealed with a lid and performs cooking under pressure.

  The pressure fryer has an oil tank that opens on the top surface and can accommodate cooking oil, a heating means such as a pulse combustor that heats cooking oil in the oil tank, and a lid that can open and close the opening of the oil tank. Heating cooking oil with a heating means in a state where the oil tank is hermetically sealed by the body enables cooking of the food under pressure (for example, see Patent Document 1). This lid body includes a lid body that can close the oil tank, and an arm that supports the lid body, and the rear end of the arm is rotatably connected by a rotation shaft in the left-right direction installed on the rear side of the oil tank. It can be rotated between an upright position for opening the oil tank and a lying position for closing the oil tank.

JP 2011-244942 A

  In the conventional pressure fryer, since the weight of the lid is large, in order to reduce the burden on the operator, for example, a biasing means such as a torsion coil spring is provided on the rotating shaft of the lid. However, in this case, there is a possibility that the lid body will spring up vigorously when opening the lid body, and the lid body may collide with the operator due to the splash. For this purpose, it is conceivable to provide a brake mechanism on the lid. However, the structure becomes complicated, leading to an increase in cost and weight, and braking is applied even during the opening and closing of the lid, resulting in poor operability.

  Therefore, the present invention provides a pressure fryer that can smoothly open and close the lid with a simple configuration, and is low in cost and excellent in operability even if the lid is provided with a biasing means for the opening side. It is intended to provide.

To achieve the above object, the invention according to claim 1 is an oil tank supported by a housing and having an upper surface opened to contain cooking oil, a heating means for heating cooking oil in the oil tank, and a rear part of the oil tank. A lid that is fixed to a left and right rotation shaft that is pivotally supported by the housing, and that can rotate between a lying position that closes the opening of the oil tank and a standing position that opens the opening around the rotation shaft, and a rotation shaft The other end is a fixed end that is fixed to the housing side, and the other end is an action end that is locked to the lid body side, and the lid body is rotated and biased to the standing position, and the lid body is moved from the standing position to the lying down position. A torsion coil spring in which the winding diameter contracts with the rotation of the action end when rotating, and the winding diameter expands with the rotation of the action end when the lid rotates from the lying position to the standing position. A pressure fryer that is turned inside the torsion coil spring. Axis parallel brake shaft, translatable on a plane perpendicular to the rotational axis and rotatably accommodated in the collapsed position of the lid, is pressed against the rotating shaft of the brake shaft by the contraction of the winding diameter of the torsion coil spring Thus, a braking force can be applied to the rotating shaft.
According to a second aspect of the present invention, in the configuration of the first aspect, the support shaft that passes through the torsion coil spring and supports the brake shaft from below on the housing side on the rear lower side of the rotation shaft is parallel to the rotation shaft and rotates. When the winding diameter of the torsion coil spring is shrunk at the position where the lid body is lying down, the brake shaft is brought into contact with the rotating shaft and the support shaft at the same time, and the torsion coil spring is rotated along with the rotation of the lid body to the standing position. By expanding the winding diameter, the brake shaft is separated from the rotating shaft and brought into contact with only the support shaft, and the inner circumference of the torsion coil spring is increased when the winding diameter is expanded due to the rotation of the lid to the standing position. It is possible to apply a braking force that is smaller than the braking force at the position where the lid body is laid down to the working end of the torsion coil spring by pressing the braking shaft that is urged to rotate by contacting the portion with the support shaft. To do.
According to a third aspect of the present invention, in the configuration of the first or second aspect, the braking shaft is formed to have a larger diameter than the rotation shaft.
According to a fourth aspect of the present invention, in the configuration of any one of the first to third aspects, an even number of torsion coil springs are arranged, and the winding direction and the positions of the fixed end and the working end are mirror-symmetrical on the left and right. It arrange | positions so that it may become.

According to the first aspect of the present invention, since the large braking force is applied to the rotation direction to the standing position of the lid by the frictional force applied to the rotation shaft via the braking shaft, the lid is in the lying position. It is prevented from being pushed up vigorously. Conversely, when the lid begins to open, the working end of the torsion coil spring rotates and expands, and the clamping force on the braking shaft decreases and the braking force weakens. It can be rotated with a relatively light force.
Therefore, even if a torsion coil spring that biases the lid to the open side is provided, the lid can be opened and closed smoothly with a simple configuration that adds a braking shaft, and it has low cost and excellent operability. It becomes.
According to the second aspect of the present invention, in addition to the effect of the first aspect, since the brake shaft is pressed only by the support shaft during the opening and closing of the lid, the minimum braking force is obtained. Even if you take your hand off the body, the lid does not rotate freely.
According to the third aspect of the present invention, in addition to the effect of the first or second aspect, it is possible to easily apply a large braking force to the rotating shaft by making the braking shaft have a large diameter.
According to the fourth aspect of the present invention, in addition to the effects of any one of the first to third aspects, the even number of torsion coil springs are arranged so as to be mirror-symmetric on the left and right, so that the braking shaft is also mirror-symmetrical. Thus, the braking shaft does not tilt inside the torsion coil spring, and a desired braking force can be exerted.

It is a perspective view of a pressure fryer. It is a top view of a pressure fryer. It is a side view of a pressure fryer. It is a center longitudinal cross-sectional view of a pressure fryer. It is an enlarged view of a cover part. It is a perspective view from the back of the connection part of a lid. FIG. 7 is a perspective view of a state where the support shaft is broken in FIG. 6. It is a perspective view of the pressure fryer which open | released the oil tank. It is explanatory drawing which shows the expansion / contraction state of the torsion coil spring accompanying opening and closing of a cover body, (A) shows a fall position, (B) shows an intermediate position, (C) shows the state in a standing position, respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 are explanatory views showing an example of a pressure fryer. FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a side view, and FIG. The pressure fryer 1 has a plan view in the center of a square box-shaped housing 2 comprising a frame 3 as a framework and a panel (not shown) (not shown) shown on the outside thereof. A rectangular oil tank 5 is installed with the upper end opening 6 protruding upward from the upper panel 4 so that cooking oil stored in the oil tank 5 can be heated by a pulse combustor 7 as a heating means. It is. The top panel 4 is provided with a lid 8 that can open and close the opening 6 of the oil tank 5. 9, 9... Are casters provided at the four corners of the lower surface of the housing.

  The pulse combustor 7 is provided on the front inner surface of the oil tank 5 and combusts a mixed gas of fuel gas and combustion air, and combustion exhaust from the combustion chamber 10 is discharged to the inner surface of the oil tank 5. And a tail pipe 11 that circulates along. A combustion chamber 13 in an air chamber 12 provided on the front outer surface of the oil tank 5 is connected to the combustion chamber 10. Combustion air is connected to the mixing chamber 13 from a fan 14 in the housing 2 via a pipe. And a fuel gas is supplied from a gas conduit 16 having a flasher 15 having a solenoid valve.

  The downstream side of the tail pipe 11 is connected to the left and right exhaust pipes 17 and 17 through the air chamber 12, and is further led into the rising portion 19 installed behind the housing 2 through the decoupler 18 and the like, so that the combustion exhaust Can be discharged from the exhaust tube 20. The rising portion 19 and the upper part of the oil tank 5 are connected by two steam exhaust pipes 21 and 22, and one steam exhaust pipe 21 includes a constant pressure valve 23 so that the pressure in the oil tank 5 is equal to or higher than a predetermined value during cooking. The pressure in the oil tank 5 is kept constant by allowing the pressure to escape into the rising portion 19 when the pressure increases. The other steam discharge pipe 22 includes an opening valve 24 and opens the opening valve 24 immediately before the end of cooking, thereby releasing the pressure in the oil tank 5 into the rising portion 19 and increasing the pressure in the oil tank 5 to normal pressure. Reduce. The rising portion 19 has an oil separator that separates oil and the like from the steam introduced therein, and discharges the steam separated from the oil from the exhaust port 25 on the upper surface.

On the other hand, an oil tank (not shown) connected to the bottom of the oil tank 5 by an oil drain pipe 26 is provided in the lower part of the oil tank 5 in the housing 2, and cooking oil filtered by a filter provided in the oil tank is returned by a pump 27. By returning to the oil tank 5 through 28, cooking oil can be filtered.
29 is a burner controller provided at the lower part of the side surface of the housing 2. The burner controller 29 is connected to a solenoid valve of the flasher 15 and a temperature sensor (not shown) provided in the oil tank 5. Based on the temperature detection signal from the sensor, mixing in the combustion chamber 10 is performed by opening and closing the electromagnetic valve of the flasher 15 so as to maintain the oil temperature in the oil tank 5 at the cooking temperature (for example, 180 ° C. to 182 ° C.). ON / OFF control is performed to intermittently burn the gas. In addition, an operation panel 31 having operation buttons, a display unit, and the like is provided on the upper front side of the housing 2, and a fly controller 30 that sets a cooking mode, a heat retention mode, a cooking temperature, and the like and inputs an instruction to the burner controller 29 is provided. It has been.

The lid body 8 includes a rectangular tube-shaped arm 32 and an aluminum lid body 33 that is connected to the arm 32 and can be fitted onto the opening 6 of the oil tank 5. A handle shaft 34 having a cross-shaped handle 35 at the upper end is screwed into the longitudinal center of the arm 32, and the upper surface center of the lid body 33 is connected to the lower end of the handle shaft 34.
A pair of left and right connecting plates 36, 36 are connected orthogonally to the rear end of the arm 32, and the lower ends of the connecting plates 36, 36 are a pair of left and right erected on the upper panel 4 behind the oil tank 5. The shaft support plates 37 are connected to the upper ends of the shafts 37 so as to be rotatable by a rotation shaft 38 in the horizontal direction. The connecting plates 36 and 36 and the rotating shaft 38 are integrally fixed in the rotating direction.

  Further, a pair of left and right torsion coil springs 39, 39 as urging means are packaged on the rotating shaft 38 so that the winding direction and both end positions are mirror-symmetrical, and each lower end adjacent to each other at the center of both torsion coil springs 39. Are fixed ends 41 and 41 that are locked to the inner side of the locking bar 40 that connects the rear ends of the shaft support plates 37 and 37, while upper ends that are positioned on the left and right outer sides are locked to the lower surface of the arm 32. Thus, the working ends 42 and 42 for urging the arm 32 to rotate toward the open side of the oil tank 5 are formed.

  However, the winding diameter of the torsion coil spring 39 is larger than that of the rotating shaft 38 as shown in FIG. 5, and the brake shaft 43 having a larger diameter than the rotating shaft 38 and the rotating shaft 38 are included therein. And a support shaft 44 having substantially the same diameter are accommodated in parallel with the rotation shaft 38. As shown in FIG. 6, both ends of the support shaft 44 are supported by the shaft support plate 37 through the shaft support plates 37, 37 on the lower rear side of the rotary shaft 38, but pass through the connection plates 36, 36. The support shaft 44 abuts on a stepped notch 45 provided at the rear end of each connecting plate 36 at the standing position of the lid 8 that opens the oil tank 5 so as to restrict the rotation of the arm 32. It has become. The restricting means restricts the rotation of the lid 8 at a position rotated 87 ° rearward from the lying position, which is 0 ° indicated by a solid line in FIG. 5, and is slightly forward from 90 ° in the vertical direction as indicated by a two-dot chain line. It is tilted upright. Inside the arm 32, a counterweight 46 having a U-shaped cross section is accommodated and fixed to the inner surface of the arm 32. In the standing position, the center of gravity G of the lid 8 is behind the axis O1 of the rotating shaft 38, that is, It is set so as to be positioned behind a virtual line L in the vertical direction passing through the axis O <b> 1 of the rotation shaft 38. Therefore, even when the lid body 8 is in a forward inclined posture of 87 °, the standing position is maintained.

Further, the brake shaft 43 is not connected to the connecting plate 36 and the shaft support plate 37, and is located behind the rotating shaft 38 and above the supporting shaft 44 in the torsion coil spring 39, and is connected to the axis of the rotating shaft 38. Parallel movement is possible on the orthogonal plane.
Therefore, here, the axis O1 of the rotating shaft 38 which is the rotation center of the lid 8 and the axis O2 of the torsion coil spring 39 do not coincide with each other, and the axis O2 of the torsion coil spring 39 is the axis of the rotating shaft 38. It is eccentric rearward and lower than O1. As a result, the rotation angle α1 of the lid 8 is 87 °, whereas the rotation angle α2 of the working end 42 of the torsion coil spring 39 is 74 °, which is smaller than the rotation angle of the lid 8.

Reference numeral 47 denotes a U-shaped stopper plate that is fixed between the left and right shaft support plates 37, 37, and the stopper portions 48, 48 at the left and right ends are positioned inside the shaft support plates 37, 37, respectively. The upper surface is located slightly below the support shaft 44, and as shown in FIG. 6, there is a gap between the connecting plates 36 and 36 that abut the support shaft 44 at the standing position of the lid body 8. Accordingly, when the support shaft 44 is broken or the like and the regulation of the coupling plates 36 and 36 becomes impossible and the lid body 8 rotates rearward, the coupling is coupled to the stopper portions 48 and 48 of the stopper plate 47 as shown in FIG. The rotation of the lid 8 can be restricted by the plates 36 and 36 coming into contact with each other.
In addition, a semi-cylindrical spring cover 49 is provided above the stopper plate 47 so as to cover the outer surfaces of the torsion coil springs 39 and 39 between the connecting plates 36 and 36 from the front to the upper side. Is prevented from adhering.

On the other hand, at the front end of the arm 32, a pair of left and right lock plates 50, 50 having a grip rod 51 on the outside of the protruding end and a lock rod 52 on the inside can swing back and forth about the connecting shaft 53. And a line connecting the lock rod 52 and the connecting shaft 53 is urged to an inner position that is orthogonal to the arm 32 by a torsion spring 54 provided on the connecting shaft 53. On the front surface of the oil tank 5, a receiving portion 55 that can be locked by the lock rod 52 in a closed state of the oil tank 5 by the lid body 33 protrudes.
Further, a cover portion 56 that covers the outer periphery of the upper end of the oil tank 5 in the closed state of the oil tank 5 is formed on the periphery of the lid body 33, and a packing 57 is provided on the inner side of the cover section 56 over the entire periphery. It has been. Further, when the lid 8 is fully opened, a receiving plate 58 extending in the left-right direction and inclined downward to the left is screwed to the lower side of the cover portion 56 located below the standing position of the lid 8. The oil flowing down along the inner surface of the lid body 33 is received. The oil received by the receiving tray 58 is received in the receiving cylinder 60 provided on the upper surface panel 4 from the drop hole 59 on the left side of the receiving tray 58, and is sent to the rising portion 19 through the feeding pipe 61.

  Therefore, when closing the oil tank 5, if the arm 32 is rotated forward while holding the holding rod 51 from the front side of the housing 2 and swinging the lock plate 50 outward, the lid body 33 also follows and moves forward. To close the opening 6 of the oil tank 5. When the lock plate 50 is pushed into the inner position in this state, the lock rod 52 is engaged with the receiving portion 55 and the lid body 8 is held at the lying position where the oil tank 5 is closed. Here, when the handle 35 is rotated and the handle shaft 34 is screwed into the arm 32, the lid body 33 is pressed against the oil tank 5, the packing 57 of the lid body 33 is brought into close contact with the opening 6 of the oil tank 5, and the oil tank 5 is sealed. . When opening the oil tank 5, the handle 35 is rotated in the reverse order to release the pressure on the lid body 33, and then the arm 32 is rotated upward while holding the grip bar 51 and pulling the lock plate 50 toward you. Then, the lid body 33 also follows and rotates upward, and the lid body 8 moves to a standing position where the oil tank 5 is opened as shown in FIG.

When the lid 8 is raised and lowered, the working end 42 of each torsion coil spring 39 also rotates following the rotation of the arm 32, and the axial length of each torsion coil spring 39 depends on the rotation of the action end 42. Changes and expands / contracts the winding diameter. That is, when the lid 8 is closed, the axial length of the torsion coil spring 39 is maximized and the winding diameter is contracted, so that the inner rotary shaft 38, the brake shaft 43, and the support shaft 44 are respectively tightened from the outside. As shown in FIG. 9 (A), the brake shaft 43 comes into contact with the rotating shaft 38 and the support shaft 44 and is pressed by both. Therefore, when the lid 8 is opened in this state, a large braking force is generated in the opening direction due to the frictional force between the rotating shaft 38 and the braking shaft 43, and thus the lid 8 is flipped up vigorously. Is prevented.
When the lid 8 starts to open, the winding diameter of the torsion coil spring 39 gradually expands according to the rotation of the action end 42, so that the pressure on the braking shaft 43 weakens and the braking force due to friction gradually decreases. Therefore, the cover body 8 can be opened with a relatively light force by applying an urging force by the torsion coil spring 39.

As the torsion coil spring 39 expands, as shown in FIG. 9B, the braking shaft 43 rolls rearward away from the rotation shaft 38 and contacts the inner peripheral portion of the torsion coil spring 39 and the support shaft 44. It is supported in the state. At this time, the torsion coil spring 39 gradually moves the contact point with the brake shaft 43 rearward as it expands, so that the brake shaft 43 is urged to rotate in the direction of the arrow. However, since the brake shaft 43 is in contact with the support shaft 44, the frictional force generated between the brake shaft 43 and the support shaft 44 adds resistance to the rotation of the brake shaft 43, and the torsion coil spring to be expanded. A predetermined braking force always acts on the action end 42 of 39. Accordingly, if the hand is released from the gripping rod 51 while the lid 8 is being opened, the lid is caused by a balance between the expanding force of the torsion coil spring 39 and the frictional force (braking force) between the braking shaft 43 and the support shaft 44. The movement of the body 8 will stop. When the lid body 8 is rotated from here to the open side, the urging force exceeds the braking force, so that the lid body 8 can be rotated to the standing position in FIG. In this state, the inner peripheral portion of the torsion coil spring 39 is also away from the rotating shaft 38.
When the lid body 8 is laid down from the standing position, the torsion coil spring 39 gradually contracts from the fully expanded state, so that the braking shaft 43 performs the reverse operation and the support shaft 44 is brought into contact with the support shaft 44 only. And the braking force gradually increases. Therefore, the lid 8 does not close vigorously.

The braking force due to the contraction of the torsion coil spring 39 when the lid 8 is closed is strongest on the working end 42 side and gradually decreases from the working end 42 side as the lid 8 is opened, so only one torsion coil spring 39 is provided. If this is the case, the force applied to the braking shaft 43 becomes non-uniform, and the braking shaft 43 may be tilted on the inside and a desired braking force may not be obtained.
However, since the torsion coil spring 39 is provided mirror-symmetrically on the left and right sides here, a force can be applied mirror-symmetrically to the braking shaft 43. Therefore, it is possible to obtain the desired braking force by preventing the braking shaft 43 from tilting.

  In the pressure fryer 1 configured as described above, when pressure cooking is performed, the lid 8 is closed in a state where the oil tank 5 is filled with cooking oil and the food is stored using the basket 62. At this time, the lid body 8 in the standing position is in a posture inclined forward from 90 ° as described above, and the grip bar 51 is provided at the front end of the lock plate 50 protruding forward from the arm 32. A person can easily grip the gripping rod 51 and close the lid body 8 without leaning over the oil tank 5 greatly.

  After the oil tank 5 is closed, when the predetermined cooking mode is selected by the fly controller 30 and the operation switch of the operation panel 31 is turned on, the burner controller 29 rotates the fan 14 for a predetermined time and supplies air. Then, the mixed gas is burned intermittently to operate the pulse combustor 7. That is, the spark plug 63 (FIG. 4) provided in the combustion chamber 10 ignites the mixed gas to explode and burn in the combustion chamber 10, and the combustion exhaust is removed from the tailpipe by the pressure increase in the combustion chamber 10 accompanying the combustion. 11 is forcibly discharged to 11 and the operation (ON / OFF operation) of sucking fuel gas and combustion air into the combustion chamber 10 which becomes negative pressure due to the discharge of the combustion exhaust is repeated or input adjustment by proportional control To do.

  When the pressure cooking is completed, the operator rotates the handle 35 to release the pressure on the lid body 33, and then grips the gripping bar 51 and pulls out the lock plate 50 toward the front. Then, the lid 8 is lifted upward and rotated to the standing position. Therefore, the oil tank 5 can be opened and the food can be taken out. When the oil tank 5 is opened, since the braking force is applied from the torsion coil spring 39 to the rotating shaft 38 via the braking shaft 43 as described above, the lid body 8 does not jump up vigorously.

Thus, according to the pressure fryer 1 of the said form, the braking shaft 43 parallel to the rotating shaft 38 is accommodated in the inside of the torsion coil spring 39 so that a parallel movement is possible on the surface orthogonal to the rotating shaft 38, and lid | cover In the lying position of the body 8, the braking shaft 43 is pressed against the rotating shaft 38 by contraction of the winding diameter of the torsion coil spring 39 so that a braking force can be applied to the rotating shaft 38. Since a large braking force is applied to the rotation direction of the lid body 8 to the standing position by the frictional force applied to the lid body 38, the lid body 8 is prevented from being pushed up vigorously from the lying position. On the contrary, when the lid 8 starts to open, the working end 42 of the torsion coil spring 39 rotates and expands, and the tightening force to the braking shaft 43 decreases and the braking force weakens. Can rotate the lid 8 with a relatively light force.
Therefore, even if the torsion coil spring 39 for biasing the lid 8 to the open side is provided, the lid 8 can be opened and closed smoothly with a simple configuration with the addition of the brake shaft 43, and the operability is low. It will be excellent.

  In particular, here, on the housing 2 side, a support shaft 44 that passes through the torsion coil spring 39 on the lower rear side of the rotation shaft 38 and supports the brake shaft 43 from below is supported in parallel with the rotation shaft 38, and the lid body 8. When the winding diameter of the torsion coil spring 39 contracts at the lying position, the braking shaft 43 is brought into contact with the rotating shaft 38 and the support shaft 44 at the same time, and the winding diameter of the torsion coil spring 39 accompanying the rotation of the lid body 8 to the standing position. When the winding diameter is increased in accordance with the rotation of the lid body 8 to the standing position, the braking shaft 43 is separated from the rotation shaft 38 and brought into contact with only the support shaft 44 by the expansion of the torsion coil spring 39. By pressing the support shaft 44 against the braking shaft 43 that is in contact with the inner peripheral portion of the torsion coil spring 39, the acting end 43 of the torsion coil spring 39 has a braking force that is smaller than the braking force at the lying position of the lid body 8. Since it is possible to grant Even during the opening and closing body 8 can be obtained the minimum braking force, there is no such thing as the lid 8 also or the hand is released to freely rotate from the lid 8.

Further, since the brake shaft 43 is formed to have a larger diameter than the rotary shaft 38, a large braking force can be easily applied to the rotary shaft 38.
Furthermore, by arranging the torsion coil spring 39 so that the winding direction and the positions of the fixed end 41 and the action end 42 are mirror-symmetrical on the left and right, it is possible to apply a mirror-symmetric force to the braking shaft 43, and torsion The braking shaft 43 does not tilt inside the coil spring 39, and a desired braking force can be exhibited.

On the other hand, in the pressure fryer 1 of the above-described form, the shaft center O2 of the torsion coil spring 39 is eccentric rearward with respect to the shaft center O1 of the rotation shaft 38, and the torsion coil spring 39 has a rotational angle (87 °) greater than the rotation angle (87 °) of the lid body 8. Since the rotation angle (74 °) of the working end 42 is reduced, the maximum stress on the torsion coil spring 39 is within the allowable stress, and the torsion coil spring 39 is not easily damaged even when the lid 8 is repeatedly opened and closed. Therefore, the life of the torsion coil spring 39 is prolonged and the durability is excellent.
Further, by making the inner diameter of the torsion coil spring 39 larger than the outer diameter of the rotating shaft 38 and accommodating the braking shaft 43 inside the torsion coil spring 39, the axis O 1 of the rotating shaft 38 and the axis O 2 of the torsion coil spring 39 are accommodated. Since both are eccentric, the eccentricity of both can be set easily. In particular, since the brake shaft 43 has a larger diameter than the rotary shaft 38, the eccentric distance can be easily increased. Furthermore, since the support shaft 44 that restricts the downward movement of the brake shaft 43 is provided, the brake shaft 43 can be stably accommodated.

And in the pressure fryer 1 of the said form, the cover body 8 is in the forward leaning position in the standing position by the control means which consists of the support shaft 44 and the connection board 36, and the setting of the gravity center position of the cover body 8. The distance between the lid body 8 and the operator is reduced, and the operator can open and close the lid body 8 without having to go over the oil tank 5 greatly. Therefore, even a small worker can easily open and close the lid 8, and the usability is improved.
In particular, the center of gravity position can be easily set by providing the counterweight 46 on the arm 32 constituting the lid 8 and setting the center of gravity position rearward.
Further, since the counterweight 46 is fixed to the inner surface of the cylindrical arm 32, the counterweight 46 can be easily installed using the arm 32, and the strength of the arm 32 can be expected to be increased by the counterweight 46.
Further, the restricting means includes a support shaft 44 provided between the left and right shaft support plates 37, 37, and a connecting plate that is provided on the arm 32 and contacts the support shaft 44 in an upright position to restrict the rotation of the arm 32. 36, the rotation of the lid body 8 can be easily regulated using the space between the shaft support plates 37, 37.

In addition, a stopper plate 47 is provided on the inner side of the shaft support plates 37, 37 so that the connecting plate 36 comes into contact with the rearward rotation of the lid body 8 positioned below the support shaft 44 and beyond the standing position. Thus, even when the support shaft 44 is damaged due to aging, the stopper plate 47 can restrict the rotation of the lid 8 and prevent the lid 8 from falling backward. Further, when the support shaft 44 is broken, the lid body 8 is rotated rearward from the normal standing position, so that the operator can easily know the breakage of the support shaft 44.
Further, the grip bar 51 protruding forward from the lid body 33 at the standing position of the lid body 8 is provided at the front end of the arm 32, so that the operator grips the grip bar 51 at a position closer to the lid body 8. Can be opened and closed, and it is possible to further reduce the number of workers.
Furthermore, by providing the torsion coil spring 39 that urges the lid 8 to the upright position, the moment when the lid 8 is rotated to the lying down position can be suppressed.

The brake shaft is not limited to a larger diameter than the rotating shaft, and may have the same diameter as the rotating shaft or a smaller diameter.
The number of torsion coil springs is not limited to two in the above form, and a plurality of four or more can be used if left and right are mirror-symmetrical, and the positions of the fixed end and the working end can be reversed from the above form. .
Further, the lid body does not need to be tilted forward at the standing position, and the braking force can be applied by the braking shaft even if the rotation angle is the same between the lid body and the action end of the torsion coil spring. As for the structure of the lid, the counterweight and the tray can be omitted.
In addition, other configurations of the pressure fryer can be appropriately changed. For example, the heating means is not limited to the pulse combustor but can be replaced with a burner, a heater, or the like. The present invention can be adopted even if the pressure tank is not a single oil tank but a pair of oil tanks arranged side by side.

  1 .... pressure fryer, 2 .... housing, 3 .... frame, 4 .... top panel, 5 .... oil tank, 6 .... opening, 7 .... pulse combustor, 8 .... lid, 10 .... combustion chamber 11 .. Tail pipe 19.. Standing part 29. Burner controller 30. Fly controller 31 Operation panel 32 Arm 33 Cover body 34 Handle shaft 35 .Handle 36 ..Connecting plate 37 ..Rotating shaft 38 ..Rotating shaft 39.. Torsion coil spring 41.. Fixed end 42.. Working end 43.. Braking shaft 44. Shaft, 45 .. notch, 46 .. counterweight, 47 .. stopper plate, 48 .. stopper portion, 50 .. lock plate, 51.

Claims (4)

An oil tank that is supported by the housing and has an upper surface opened to contain cooking oil;
Heating means for heating cooking oil in the oil tank;
Rotating between a lying position that closes the opening of the oil tank and an upright position that opens the opening, with the rotation axis as a center, is fixed to a rotating shaft in the left-right direction that is pivotally supported by the housing behind the oil tank. Possible lids,
The lid is mounted on the rotating shaft, one end is fixed to the housing side, the other end is a working end that is locked to the lid body, and the lid body is rotated and urged to the upright position. When the body rotates from the standing position to the lying position, the winding diameter contracts with the rotation of the working end, and when the lid rotates from the lying position to the standing position, the working end rotates. A torsion coil spring with which the winding diameter expands, and a pressure fryer comprising:
Inside the torsion coil spring, a braking shaft parallel to the rotation shaft is accommodated so as to be parallel and rotatable on a surface orthogonal to the rotation shaft,
A pressure fryer capable of applying a braking force to the rotating shaft by pressing the braking shaft against the rotating shaft by contraction of the winding diameter of the torsion coil spring at the lying position of the lid body . On the housing side, a support shaft that penetrates the torsion coil spring on the lower rear side of the rotation shaft and supports the brake shaft from below is supported in parallel with the rotation shaft and non-rotatably , and At the time of contraction of the winding diameter of the torsion coil spring in the lying position, the braking shaft is simultaneously brought into contact with the rotation shaft and the support shaft, and the torsion coil spring of the torsion coil spring accompanying the rotation of the lid to the standing position is By expanding the winding diameter, the brake shaft is separated from the rotating shaft and brought into contact with only the support shaft,
When the winding diameter is expanded along with the rotation of the lid to the standing position, the support shaft is pressed against the braking shaft that is in contact with the inner peripheral portion of the torsion coil spring and urges the rotation. 2. The pressure fryer according to claim 1, wherein a braking force smaller than a braking force of the lid body at the lying position can be applied to the working end of the torsion coil spring.   The pressure fryer according to claim 1 or 2, wherein the brake shaft is formed to have a larger diameter than the rotation shaft.   The even number of the torsion coil springs are arranged, and the winding direction and the positions of the fixed end and the working end are arranged so as to be mirror-symmetrical on the left and right. A pressure fryer as described in Crab.

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