KR102156648B1 - Automatic jerking apparatus - Google Patents

Abstract

The present invention relates to a functional fully-automatic frying device capable of enhancing the taste and nutrition of fried dishes. The functional fully-automatic frying device of the present invention comprises: a main body which comprises a frying tank where frying is performed by oil filled therein, and a column arranged in the vertical direction on one side of the frying tank, and which is made of stainless steel; a frying net in which frying ingredients are contained, is fed into the frying tank, and has a locking ring formed on one side thereof; a frying net up/down driving unit which is coupled to the column of the main body, and drives the frying net to be moved up/down so that the frying net is put into the frying tank or the frying net is taken out of the frying tank; a frying net vibration applying unit which is disposed adjacent to the frying net up/down driving unit and applies vibration to the frying net to remove oil from fried dishes; an operation timer remote control which has a display and a plurality of functional buttons, and inputs a signal for the progress of the frying operation; and a controller which automatically controls the operation of the frying net up/down driving unit and the frying net vibration applying unit based on the operation signal of the operation timer remote control, so that the frying net containing the frying ingredients is put into the frying tank to allow the frying operation to proceed for a predetermined time, and when the frying operation is completed, the frying net is taken out from the frying tank, and then the oil of the fried dishes is removed.

Description

Functional fully automatic frying device {AUTOMATIC JERKING APPARATUS}

The present invention relates to a functional fully automatic frying device, and more specifically, it is completely fully automatic unlike the previous one, so that even if you do other things, you can accurately fry the fried ingredients in time without burning the fried food, as well as the oil of the fried food. It can be effectively removed, and thus the taste and nutrition of fried dishes can be improved, and furthermore, there is no risk of burns, and moreover, it relates to a functional fully automatic frying device that can significantly reduce labor compared to the prior art.

Tempura dishes are widely used in general homes and restaurants because they have a wide selection of ingredients such as various fish, meat, and vegetables, and they can be cooked relatively easily, and in recent years, the cooking is more specialized due to the increase in fast food and chicken restaurants. And it is becoming mass-produced.

The most classic frying device for frying takes the form as shown in FIG. 1. That is, the conventional frying apparatus 1 includes a stainless steel container 2 having a predetermined size.

After filling the oil in the stainless steel container (2), the oil is heated with the heater (4) provided in the lower part of the stainless steel container (2), and then you can cook fried food by putting the frying ingredients in the oil in the stainless steel container (2). .

This structure is the most common classic method, and there is a disadvantage in that frying residues 6 fall and accumulate on the bottom of the stainless steel container 2 when frying using such a frying device 1 is performed.

Thus, as a solution to this, a frying device 10 as shown in FIG. 2 using a separate frying net has been proposed.

The frying device 10 of FIG. 2 is a method of frying the frying material by putting a separate frying net (not shown) containing the frying material in the body 28 filled with oil. If the frying net is used, the frying residue 6 as shown in FIG. 1 does not accumulate, so that the oil change time can be increased.

When the frying is complete, take out the frying net and put the frying inside the frying net on the oil draining shelf 26 to drain the oil. Reference numeral 24 is a control panel for controlling the temperature of the oil.

The device as shown in FIG. 2 is also commonly encountered in the surroundings.In the case of this prior art, the frying net, which substantially forms the place where the frying material is contained and fried, must be manually put into or removed from the oil in the main body, making the operation inconvenient. There is a cumbersome drawback.

In particular, since the frying net must be handled manually, there may be a risk of burns from hot oil.

Accordingly, although research on a structure that can be electrically operated up/down on the main body of the frying net is being conducted, this is due to the up or down operation of the frying net on the main body. Since it is a structure that proceeds through a signal from a separate input button, it is also inevitable that the work is cumbersome.

Again, the above-described bell wrap method automatically operates the frying net, but it is inconvenient to input signals for its operation. Also, after lifting the frying net, shake the frying net to remove oil from the frying dish. It should be removed, but considering the fact that if the process is not carried out in a timely manner, not only can the fried ingredients burn out, but also a large amount of oil remains in the fried food, which can degrade taste and nutrition. To solve this problem, there is a need to develop a new concept of a functional fully automatic frying device.

Korean Intellectual Property Office Application No. 10-2010-0038157 Korean Intellectual Property Office Application No. 10-2013-0031261 Korean Intellectual Property Office Application No. 10-2015-0140835 Korean Intellectual Property Office Application No. 10-2018-0033902

The object of the present invention is that, unlike before, it is completely fully automatic, so that even if you do other work, it is possible to accurately fry the frying ingredients in time without burning them, as well as to effectively remove the oil from the fried food. It is possible to increase, and furthermore, there is no risk of burns, as well as to provide a functional fully automatic frying device that can significantly reduce the number of hands than the conventional one.

The object comprises a frying tank in which a frying operation is performed by the filled oil, and a column disposed along a vertical direction on one side of the frying tank, and a main body made of stainless steel; A frying net in which the frying material is accommodated, and which is fed into the frying tank and has a hook formed on one side thereof; A frying net up/down driving unit coupled to the column of the main body and driving the frying net up/down so that the frying net is put into the frying tank or the frying net is taken out from the frying tank; A frying net vibration applying unit disposed adjacent to the frying net up/down driving unit and applying vibration to the frying net to remove oil from the frying dish; An operation timer remote control having a display and a plurality of functional buttons and inputting a signal for the progress of the frying operation; And the frying net containing the frying material is put into the frying tank so that the frying operation proceeds for a predetermined time, and when the frying operation is completed, the frying net is taken out from the frying tank, and the oil of the frying dish is By a functional fully automatic frying device, characterized in that it comprises a controller for automatically controlling the operation of the frying net up/down driving unit and the frying net vibration applying unit based on the operation signal of the operation timer remote control so that the removal operation is performed Is achieved.

A weight detection sensor provided in the main body, connected to the controller, and configured to automatically calculate a frying time by detecting the weight of the frying material accommodated in the frying net may be further included.

It may further include an electric blower coupled to the column of the main body and connected to the controller, and automatically operates when the operation of removing oil from the frying dish is performed to blow wind toward the frying tank.

A power switch provided on the main body and configured to drive the device on/off; An antenna provided on the main body for smooth transmission and reception of signals for the frying operation; A plurality of bridges supporting the main body; And a plurality of feet coupled to the lower end of the bridge and supporting the bridge in a height adjustable manner with respect to the ground.

The frying net up/down driving unit includes a net support that supports the frying net, but has a plurality of hooks on which the hooks of the frying net are hooked and a support bar formed on the hook; A cylinder device comprising a cylinder body and a cylinder rod coupled to the cylinder body to be extended or contracted in length; A device protective insulating material surrounding and protecting the cylinder device from heat transfer to the cylinder device; And the cylinder rod is pin-coupled, but may include a gap connection plate connected to the support bar to be spaced apart by a plurality of bolts.

The frying net vibration applying unit, a motor provided in the device protection insulating material; A vibration eccentric bar connected to the motor shaft of the motor and having a vibration protrusion formed at one end thereof; And a vibration applying groove formed in the support bar and selectively receiving a vibration protruding region of the vibration eccentric bar, and having a plurality of protrusions formed on an outer wall thereof.

According to the present invention, unlike before, it is completely fully automatic, so even if you do other work, you can accurately fry the fried food in time without burning the fried food, as well as effectively removing the oil from the fried fried food, thereby improving the taste and nutrition of fried food. It can be increased, and furthermore, there is no risk of burns, and there is an effect of remarkably reducing the number of hands than the conventional one.

1 and 2 are structural diagrams of a conventional frying apparatus.
3 is a schematic configuration diagram of a functional fully automatic frying device according to an embodiment of the present invention, and is a diagram illustrating a state in which a frying net is put into a frying tank.
4 is a view showing a state in which the frying net is taken out of the frying tank in FIG. 3.
5 is an enlarged view of a main part of FIG. 3.
6 is a front view excluding a frying net in FIG. 5.
7 is a partial detailed structural diagram of FIG. 6.
8 is an enlarged view of area A of FIG. 7.
9 is an operation diagram of a groove region for applying vibration of FIG. 8.
10 is a detailed view of the operation timer remote control.
11 is a control block diagram of the functional fully automatic frying device of FIG. 3.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention.

However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text.

For example, since the embodiments can have various modifications and various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea.

In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereto.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention, and to fully inform a person of ordinary skill in the art to which the present invention belongs. And the invention is only defined by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been described in detail in order to avoid obscuring interpretation of the present invention.

Meanwhile, the meaning of the terms described in the present invention is not limited to the dictionary meaning, and should be understood as follows.

When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when it is mentioned that a component is "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between the constituent elements, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "have" refer to specified features, numbers, steps, actions, components, parts, or It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined.

Terms defined in a commonly used dictionary should be interpreted as having the meaning of the related technology in context, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiments, the same reference numerals are assigned to the same components, and in some cases, the description of the same reference numerals will be omitted.

3 is a schematic configuration diagram of a functional fully automatic frying device according to an embodiment of the present invention, a diagram of a state in which a frying net is put into a frying tank, FIG. 5 is an enlarged view of the main part of FIG. 3, FIG. 6 is a front view excluding a frying net in FIG. 5, FIG. 7 is a partial detailed structural view of FIG. 6, FIG. 8 is an enlarged view of area A of FIG. 7, and FIG. 9 is The operation diagram of the groove area for applying vibration of, FIG. 10 is a detailed view of the operation timer remote control, and FIG. 11 is a control block diagram of the functional fully automatic frying device of FIG. 3.

Referring to these drawings, the functional fully automatic frying apparatus 100 according to the present embodiment is completely fully automatic unlike the previous one, so that even if you do other things, you can accurately fry the fried ingredients in time without burning the fried food. Since the oil can be removed effectively, the taste and nutrition of fried food can be improved, and furthermore, there is no risk of burns and the labor can be significantly reduced compared to the conventional one.

In other words, if the frying material is put into the frying net 120 to be described later and the functional fully automatic frying device 100 according to the present embodiment is operated, after the frying is completed at a predetermined time, the operation of removing the oil can be automatically completed. You can enhance the taste and nutrition of fried food.

In particular, as described above, the functional fully automatic frying apparatus 100 according to the present embodiment is completely automatic, and thus there is an advantage of being able to accurately fry the frying material in time without burning the frying material even if it does other work.

Functional fully automatic frying device 100 according to this embodiment that can provide such an effect includes a main body 110, a frying net 120, a frying net up/down driving unit 130, and a frying net vibration applying unit 140 Can include.

The main body 110 forms the appearance of the functional fully automatic frying device 100 according to this embodiment. That is, the main body 110 includes a frying tank 111 in which a frying operation is performed by the filled oil, and a column 112 disposed along a vertical direction on one side of the frying tank 111.

The fryer 111 is provided with a heater (not shown) for heating the oil filled therein, which has been omitted for convenience.

The column 112 constitutes a place where the frying net up/down driving unit 130 and the frying net vibration applying unit 140 are installed as a type of wall.

The body 110 is made of a stainless steel material that is light and resistant to corrosion.

However, in the case of this embodiment, the signal for frying operation should be smoothly transmitted and received to the frying net up/down driving unit 130 and the frying net vibration applying unit 140 in the main body 110 through the operation timer remote control 160 (Including Bluetooth signals), stainless steel may interfere with these signals. To this end, that is, the antenna 155 is installed in the main body 110 for smooth transmission and reception of signals for frying operations.

In addition, a power switch 154 for driving the device on/off is provided around the antenna 155.

The body 110 is supported by a plurality of bridges 114. A foot 115 is provided at the lower end of the bridge 114.

The foot 115 serves to support the bridge 114 in a height adjustable manner with respect to the ground. Accordingly, although the foot 115 is schematically illustrated in the drawing, a height adjustment means, for example, a screw structure may be applied to the foot 115.

A power supply line 171 is connected to the main body 110. An adapter 172 for converting commercial power into DC power is connected to the power supply line 171.

The body 110 is further equipped with a weight detection sensor 151 and an electric blower 152.

The weight detection sensor 151 is provided in the main body 110 and is connected to the controller 180 to be described later, and serves to automatically calculate the frying time by sensing the weight of the frying material accommodated in the frying net 120.

When the weight detection sensor 151 is applied as in this embodiment, if only the frying material is selected through the operation timer remote controller 160 to be described later, the weight detection sensor 151 detects the amount and determines the correct frying time through a preset table. It can be calculated and transmitted to the controller 180. Therefore, there is an advantage that it is not necessary to determine the frying time.

The electric blower 152 is coupled to the column 112 of the main body 110, but is connected to the controller 180, and automatically operates to direct the wind toward the frying tank 111 when the operation of removing oil from the frying dish is in progress. It serves to blow air.

That is, when the operation of removing oil by shaking the fried food as shown in FIG. 3 is performed, the electric blower 152 automatically operates to prevent the oil from scattering around. Of course, there is also the advantage of providing a crispy fried dish through quick cooling by blowing air into the fried dish.

The frying net 120 is a net in which frying ingredients are accommodated, and is put into oil in the frying tank 111 to form a place where frying is performed. A catching ring 121 is formed on one side of the frying net 120 so that the frying net 120 can be detachably connected to the frying net up/down driving unit 130. In addition to the locking role, the locking ring 121 also functions as a handle.

The frying net up/down driving unit 130 is coupled to the column 112 of the main body 110, and the frying net 120 is put into the frying tank 111 or the frying net 120 is taken out from the frying tank 111 It serves to drive the frying net 120 up / down (up / down).

This frying net up/down driving unit 130 supports the frying net 120, but is formed on the top of the plurality of hook portions 132 and hook portions 132 to which the hooks 121 of the frying net 120 are caught. A cylinder device 134 having a net support 131 having a support bar 133, and a cylinder body 134a and a cylinder rod 134b coupled to the cylinder body 134a in a length extension or reduction , In order to prevent heat from being transferred to the cylinder device 134, the device protective insulation 135 and the cylinder rod 134b are coupled with a pin 138 to protect the cylinder device 134 by a plurality of bolts 139. It includes a gap connection plate 137 connected to the support bar 133 to be spaced apart.

In this way, by connecting the cylinder device 134 to the net support 131 on which the frying net 120 is applied, and the controller 180 driving the cylinder device 134, the frying net 120 is automatically It can be driven up/down. Therefore, even if you do other things, the fried ingredients do not burn.

Of course, the frying net up/down driving unit 130 may be applied as the cylinder device 134, but the frying net up/down driving unit 130 may be implemented in a rack and pinion structure, all of which are the rights of the present invention. It should be said that it is within the range.

The frying net up/down driving unit 130 is disposed adjacent to the frying net up/down driving unit 130, and serves to apply vibration to the frying net 120 to remove oil from the frying dish.

The frying net vibration applying unit 140 is connected to the motor 141 provided in the device protection insulating material 135 and the motor shaft 141a of the motor 141, and a vibration protrusion 142a is formed at one end. Vibration eccentric bar 142, formed in the support bar 133, the vibration protrusion 142a of the vibration eccentric bar 142 is selectively accommodated, and a plurality of protrusions 143a are formed on the outer wall of the vibration applying groove (143) may be included.

Accordingly, when the net support 131 including the frying net 120 is up (up) by the frying net 120 by the frying net up/down driving unit 130 as shown in FIG. 4 in FIG. 3, the vibration protrusion of the vibration eccentric bar 142 The region (142a) can be accommodated in the vibration applying groove 143 formed in the support bar 133, and when the motor 141 operates in this state, the vibration protrusion according to the rotation of the vibration eccentric bar 142 ( The support bar 133 may be shaken while 142a crosses the protrusions 143a of the vibration applying groove 143. Therefore, the support bar 133 is shaken by the action of the gap connection plate 137 connected to the support bar 133 to be spaced apart by a plurality of bolts 139, so that the frying net 120 connected thereto is shaken and oil Subtraction can be done.

Of course, it is possible to apply the frying net vibration applying unit 140 in this structure, but it is possible to directly shake the frying net 120 by omitting this structure and using a separate vibrator (not shown). It should be said that it belongs to the scope of the present invention.

On the other hand, in the functional fully automatic frying apparatus 100 according to the present embodiment, an operation timer remote control 160 and a controller 180 are provided for fully automatic progress of the frying operation.

The operation timer remote control 160 includes a display 161 and a plurality of functional buttons 162, and is a device that inputs a signal for the progress of a frying operation. Frying time, vibration time, etc. can be directly input through the operation timer remote control 160.

The vibration time can be set mainly about 5~7 seconds, whereas the frying time can vary depending on the type and amount of the fried ingredients. In particular, in the case of the same type, the frying time may vary depending on the amount.

However, in the case of this embodiment, since the weight detection sensor 151 is applied, if only the frying material is selected through the operation timer remote control 160, the weight detection sensor 151 detects the amount and accurate frying time through a preset table. Can be calculated and transmitted to the controller 180. Therefore, when the weight detection sensor 151 is applied as in this embodiment, there is an advantage that it is not necessary to determine the frying time.

The controller 180 allows the frying net 120 in which the frying material is accommodated to be put into the frying tank 111 so that the frying operation proceeds for a predetermined time, and when the frying operation is completed, the frying net 120 is the frying tank 111 After being taken out from, the operation of the frying net up/down driving unit 130 and the frying net vibration applying unit 140 is automatically operated based on the operation signal of the operation timer remote control 160 so that the operation of removing the oil of the fried dish proceeds. To control.

In addition, the controller 180 is connected to the weight detection sensor 151, controls the frying time to be automatically set based on the value sensed by the weight detection sensor 151, and is connected to the electric blower 152 to cook fried food. The electric blower 152 is operated during the operation of removing oil from the oil and controls it to prevent the oil from scattering.

The controller 180 performing this role may include a central processing unit 181 (CPU), a memory 182 (MEMORY), and a support circuit 183 (SUPPORT CIRCUIT).

The central processing unit 181 is industrial in order to automatically control the operation of the frying net up/down driving unit 130 and the frying net vibration applying unit 140 based on the operation signal of the operation timer remote controller 160 in this embodiment. It may be one of various computer processors that can be applied as.

The memory 182 (MEMORY) is connected to the central processing unit 181. The memory 182 can be installed locally or remotely as a computer-readable recording medium, and can be easily used such as random access memory (RAM), ROM, floppy disk, hard disk, or any digital storage type. It may be at least one or more memories.

The support circuit 183 (SUPPORT CIRCUIT) is coupled with the central processing unit 181 to support typical operation of the processor. The support circuit 183 may include a cache, a power supply, a clock circuit, an input/output circuit, a subsystem, and the like.

In this embodiment, the controller 180 automatically controls the operation of the frying net up/down driving unit 130 and the frying net vibration applying unit 140 based on the operation signal of the operation timer remote controller 160, such a series of The control process or the like may be stored in the memory 182. Typically software routines may be stored in memory 182. Software routines can also be stored or executed by other central processing units (not shown).

Although the process according to the present invention has been described as being executed by a software routine, it is also possible that at least some of the processes of the present invention are performed by hardware. As such, the processes of the present invention may be implemented by software executed on a computer system, or by hardware such as an integrated circuit, or by a combination of software and hardware.

When explaining the operation of the functional fully automatic frying device 100 having such a configuration is as follows.

In the state where the frying material is loaded in the frying net 120, pressing the button of the operation timer remote controller 160 automatically lowers the frying net 120 by the action of the frying net up/down driving unit 130 to perform the frying operation for a predetermined time. In progress, when the frying operation is completed, the frying net 120 is automatically raised by the action of the frying net up/down driving unit 130, and the frying net 120 is fried by applying vibration to the frying net 120 through the frying net vibration applying unit 140 Oil draining can be done automatically.

Thus, even if the chef does anything else, he can fry deliciously without burning the ingredients.

According to this embodiment, which works based on the structure as described above, unlike the previous one, it is completely automatic, so even if you do other things, you can accurately fry the fried ingredients in time without burning the fried ingredients, as well as the oil of the fried food. Since it can be removed effectively, the taste and nutrition of fried food can be improved, and furthermore, there is no risk of burns, and labor can be significantly reduced than before.

As described above, the present invention is not limited to the described embodiments, and it is apparent to those of ordinary skill in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations belong to the claims of the present invention.

100: functional fully automatic frying device 110: main body
111: frying tank 112: column
114: bridge 115: foot
120: frying net 121: hook
130: frying net up/down driving unit 131: net support
132: hook portion 133: support bar
134: cylinder device 134a: cylinder body
134b: cylinder rod 135: device protective insulation
137: clearance connection plate 138: pin
139: bolt 140: frying net vibration applying unit
141: motor 141a: motor shaft
142: vibration eccentric bar 142a: vibration protrusion
143: vibration application groove 143a: protrusion
151: weight detection sensor 152: electric blower
154: power switch 155: antenna
160: operation timer remote control 161: display
162: functional button 180: controller

Claims (6)

A main body comprising a frying tank in which a frying operation is performed by the filled oil, and a column disposed along a vertical direction on one side of the frying tank, and made of a stainless steel material;
A frying net in which the frying material is accommodated, and which is fed into the frying tank and has a hook formed on one side thereof;
A frying net up/down driving unit coupled to the column of the main body and driving the frying net up/down so that the frying net is put into the frying tank or the frying net is taken out from the frying tank;
A frying net vibration applying unit disposed adjacent to the frying net up/down driving unit and applying vibration to the frying net to remove oil from the frying dish;
An operation timer remote control having a display and a plurality of functional buttons and inputting a signal for the progress of the frying operation; And
The frying net containing the frying material is put into the frying bath to allow the frying operation to proceed for a predetermined time, and when the frying operation is completed, the frying net is taken out from the frying bath, and then the oil of the frying dish is removed A controller for automatically controlling the operation of the frying net up/down driving unit and the frying net vibration applying unit based on the operation signal of the operation timer remote control so that the operation is performed,
The frying net up/down driving unit includes a net support that supports the frying net, but has a plurality of hooks on which the hooks of the frying net are hooked and a support bar formed on the hook; A cylinder device comprising a cylinder body and a cylinder rod coupled to the cylinder body to be extended or contracted in length; A device protective insulating material surrounding and protecting the cylinder device from heat transfer to the cylinder device; And a gap connection plate connected to the support bar by means of a plurality of bolts through which the cylinder rod is pin-coupled.
The method of claim 1,
Functional fully automatic frying device, characterized in that it further comprises a weight detection sensor provided in the main body, connected to the controller, and configured to automatically calculate a frying time by sensing the weight of the frying material accommodated in the frying net.
The method of claim 1,
Functional fully automatic, characterized in that it further comprises an electric blower coupled to the column of the main body and connected to the controller, and automatically operates to blow wind toward the frying tank when the operation of removing oil from the frying dish is in progress. Frying device.
The method of claim 1,
A power switch provided on the main body and configured to drive the device on/off;
An antenna provided on the main body for smooth transmission and reception of signals for the frying operation;
A plurality of bridges supporting the main body; And
A functional fully automatic frying device, characterized in that it further comprises a plurality of feet coupled to the lower end of the bridge and supporting the bridge in a height adjustable height relative to the ground.
delete The method of claim 1,
The frying net vibration applying unit,
A motor provided in the device protection insulating material;
A vibration eccentric bar connected to the motor shaft of the motor and having a vibration protrusion formed at one end thereof; And
A functional fully automatic frying device comprising a vibration applying groove formed in the support bar and selectively receiving a vibration protruding region of the vibration eccentric bar, and having a plurality of protrusions formed on an outer wall.

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