KR0153700B1 - Hole position certification method for pizza automatic vending machine - Google Patents

Abstract

The present invention relates to a driving method that can find the location of the home most efficiently in a pizza vending machine (hereinafter referred to as a vending machine), and more particularly, in the case where a position detecting unit (switch) for detecting a home location is broken. It relates to a home position checking method of the vending machine to prevent the twisting of the wiring generated.

The home positioning method of the pizza vending machine of the present invention includes a main control unit 12 for controlling the entire circuit, a pizza sensor unit 14 for detecting the presence of pizza, and a disk drive unit for driving the motor in both directions. 16, a home position detecting unit 18 for detecting a home position, a gear counter unit 20 for counting the number of teeth of a gear moved by a motor, and a display unit for displaying an operating state externally ( In the pizza vending machine comprising 22),

Rotating the disk 8 to find the position of the HOME, counting the number of gear teeth, and stopping the rotation of the disk 8 if the position of the groove is found; A second step of stopping rotation of the disk 8 when the number of gear teeth counted in the first step is the first predetermined value 90; Rotating the disk 8 to find the position of the groove, counting the number of gear teeth, and stopping the rotation of the disk 8 when the position of the groove is found; A fourth step of displaying a home position error and stopping the disk 8 if the number of gear teeth counted in the third step is a second predetermined value 210; And a fifth step of turning off the disk motor after turning the disk 8 left until the number of gear teeth becomes the third predetermined value 120.

Description

How to check the home position of the pizza vending machine

1 is a schematic front view of a pizza vending machine conventionally used.

2 is a bottom view of a rotating disk of a pizza vending machine.

3 is a plan view of a rotating disk of a pizza vending machine.

4 is a block diagram of a circuit used in the present invention.

5 is a flowchart for explaining the method of the present invention.

* Explanation of symbols for main parts of the drawings

1: pizza vending machine 2: pizza tray

3: pizza ejection device 4: gear mechanism

5: microwave 6: pizza stand

7: door 8: rotating disc

9: pizza 12: main fisherman

14 disc detection sensor unit 16 disc drive unit

18: home position detection unit 20: gear counter unit

22: display portion 81: drive gear

82: chain 83: rotary gear

84: axis of rotation 85: sensor

86: outlet 87: number of gear teeth

The present invention relates to a driving method that can find the location of the home most efficiently in a pizza vending machine (hereinafter referred to as a vending machine), and more particularly, in the case where a position detecting unit (switch) for detecting a home location is broken. It relates to a home positioning method of the pizza vending machine to prevent the twisting of the wiring generated.

Various types of vending machines (vending machines) are used, and pizza vending machines are one of them. In the pizza vending machine, the pizza is pre-kneaded and sold in a semi-finished state in the first place. Therefore, the pizza vending machine has a characteristic of decaying at room temperature, so it must be particularly frozen.

For this purpose, the conventional pizza vending machine sells sealed packaged pizzas, and since the selling period is long, the pizza is stored in a freezer (freezer) to prevent corruption.

The freezer is provided with a plurality of loading boxes for loading a plurality of pizzas (about 25 pieces) inside, and conventionally, two types of pizzas are loaded and sold. Typically, only one type of pizza is put into four stackers, and the other type of pizza is put into three pizza stackers. The reason why these two types are introduced is due to the structural problems of the freezer and the pizza takeout device.

1 is a front view with the front cover removed in order to schematically show the structure of a pizza vending machine 1 conventionally used. As shown, there is a pizza loading box (2) is placed on the upper side to load a plurality of pizzas and always remain frozen. In the lower portion of the pizza tray 2, a rotating disk 8 for selecting a pizza is immediately rotatable adjacent to the lower end of the pizza tray 2. The rotating disk 8 is formed with a circular hole only in a part of the surface, through which the pizza of the type selected by the purchaser is ejected from the pizza tray 2.

In the lower adjacent portion of the rotating disk 8 is a pizza dispensing apparatus 3 for feeding the rotated pizza into the microwave oven 5. The pizza dispensing apparatus 3 is comprised by the fixed part and the part which moves up and down, and the up-and-down moving part (the state at the time of the movement shown by the dashed-dotted line) moves by the gear mechanism 4. As shown in FIG. The pizza 9 put into the pedestal 6 of the microwave oven 5 is heated and cooked for a predetermined time after the door 7 of the microwave oven 5 is closed.

However, in the pizza vending machine having the structure as described above, when a failure occurs in the home position detecting unit (mainly a switch is used) for finding the position of the HOME for selecting or dispensing the pizza, the position of the home There was a problem that the wiring of the disk sensor unit connected to the lower side of the rotating disk repeatedly twisted in one direction without being found, and in severe cases, there was a problem that the pizza vending machine was impossible to operate.

The present invention has been made to solve the above problems, an object of the present invention to prevent the twist of the wiring connected to the lower side even when a failure occurs in the home position detecting unit for detecting the position of the pizza vending machine groove. To provide a home positioning method of the pizza vending machine.

Another object of the present invention is to provide a home positioning method of a pizza vending machine that can find the location of the home most efficiently.

Home positioning method of the pizza vending machine of the present invention for achieving the above object, the main control unit 12 for controlling the entire circuit, the pizza sensor unit 14 for detecting the presence of pizza, and the motor Disc drive unit 16 for driving in both directions, home position detecting unit 18 for detecting home position, gear counter unit 20 for counting the number of gears moved by a motor, and externally operated In the pizza vending machine comprising a display unit 22 for displaying the state,

Rotating the disk 8 to find the position of the HOME, counting the number of gear teeth, and stopping the rotation of the disk 8 if the position of the groove is found; A second step of stopping rotation of the disk 8 when the number of gear teeth counted in the first step is the first predetermined value 90; Rotating the disk 8 to find the position of the groove, counting the number of gear teeth, and stopping the rotation of the disk 8 when the position of the groove is found; A fourth step of displaying a home position error and stopping the disk 8 if the number of gear teeth counted in the third step is a second predetermined value 210; And a fifth step of turning off the disk motor after turning the disk 8 left until the number of gear teeth becomes the third predetermined value 120.

Hereinafter, a method for checking the home position of the pizza vending machine of the present invention will be described in detail with reference to the accompanying drawings.

The method of the present invention is a method for solving the problem that occurs when the disk rotates in only one direction due to a failure in the switch for detecting the home position of the pizza vending machine. The principle of the method is to prevent the twisting of wires connected to the lower side of the disc by limiting the rotation range of the disc to one rotation in any case when the disc is rotated to find a certain point of time, that is, a groove. .

The method comprises: a first step of rotating the disk in one direction to find the position of the groove, counting the number of gear teeth, and stopping the rotation of the disk if the position of the groove is found; A second step of stopping rotation of the disk when the number of gear teeth counted in the first step is a first predetermined value; Rotating the disc in opposite directions to find the position of the groove, counting the number of gear teeth, and stopping the rotation of the disk if the position of the groove is found; A fourth step of displaying a home position error indication and stopping the disc if the number of gear teeth counted in the third step is a second predetermined value; And a fifth step of turning off the disk motor after turning the disk left until the number of gear teeth reaches a third predetermined value.

First, the disk rotating method in the conventional pizza vending machine will be described using FIGS. 2 and 3. 2 is a bottom view of the rotating disk 8, a drive gear 81 that is rotated by a drive motor, a rotary gear 83 that is connected by a chain 82 and rotates about a rotation axis 84, The sensor 85 for detecting the rotational state of the disk, and the discharge groove 86 is formed. Gear teeth 87 are formed in each of the gears 81 and 83.

Gears 81 and 83 used in pizza vending machines are commonly known Geneva gears. The tenth percentile of the home in the vending machine is a standard of all operations, and once located in the home, the pizza is moved to the position where the pizza is loaded and the pizza is ejected. In the present invention is performed by counting the number of the number of gear teeth 87 of the drive gear or rotary gear 83.

When the rotating disk 8 of the pizza vending machine starts to rotate to find the home, the home position detecting unit 18 confirms this. If only the groove is correctly recognized, the main controller 12 outputs a control signal to stop the rotation of the disk.

If a failure occurs in the home position detecting unit 18 in which the switch is mainly used, even if the disk 8 rotates a lot, the position of the groove cannot be accurately detected. Therefore, in the related art, the disk continues to rotate in the direction in which the disk rotates, and twisting of wires occurs.

According to the present invention, if the position of the groove is not found after rotating the predetermined number of gears in the forward direction (for setting the direction, the initial direction is set to the forward direction and the other direction is set to the reverse direction for convenience of explanation), the other direction is not found. It will turn back to find the location of the groove. At this time, the number of gear teeth is counted in the gear counter unit 20. 3 shows the direction of the forward direction and the reverse direction of the present invention, in which arrow A indicates the forward direction and B the reverse direction. Reference numerals L1 to L4 and R1 to R3 denote installation positions of the pizza container (2 in FIG. 1) on which the pizza is loaded. Each number in the loading bin represents the number of revolutions in the number of gear teeth, which means that as the 30 gear teeth progress, it moves from L1 to L2.

Even if it rotates in the reverse rotation direction B, if the position of the groove cannot be found, and if it progresses by a predetermined number of gear teeth, the main controller 12 determines that it is impossible to find the position of the groove and displays an error on the outside.

Thereafter, the disc drive unit 16 is controlled to rotate in the forward direction to return to the original position. At this time, the wires are prevented from being twisted due to excessive rotation, and the control is performed to move only the predetermined number of gear teeth in order to move to the initial position. Therefore, according to the method of the present invention, no twisting of the wiring connected to the lower part of the disk occurs.

Effects of the present invention will be described in detail using the flowcharts of FIGS. 2 to 5.

While the pizza vending machine is in operation, the number of gear teeth is counted by using the gear counter unit 20 while rotating the disk in one direction (in the present invention, A direction to the left) to find the position of the HOME. At this time, when the position of the groove is sensed and the detection signal is input from the home position detecting unit 18, the main control unit 12 confirms that the position of the groove is found, and outputs a control signal to the disk driving unit 16 to display the disk ( Stop rotation of 8). The position at this time is stored in the main control unit 12 (first step).

If the number of gear teeth 83 input from the gear counter portion 20 reaches the first predetermined value (90, which is the position of R3) while continuing the rotation without finding the position of the groove, the main control portion 12 In order to forcibly stop the rotation of the disk to output a control signal to the disk drive unit 16. Thus, the disk stops for about two seconds. This time is to eliminate the effect of centrifugal force generated by the rotation of the disk (second step).

After being completely stopped, the main controller 12 rotates the disk 8 in the reverse direction B opposite to the forward direction A. At the same time, the number of gear teeth is counted using the gear counter unit 20. At this time, when the position of the groove is sensed and the detection signal is input from the home position detecting unit 18, the main control unit 12 confirms that the position of the groove is found, and outputs a control signal to the disc driving unit 16 to output the disc. Stop the rotation. The position at this time is stored in the main control unit 12 (third step).

If the number of gear teeth 83 inputted from the gear counter part 20 reaches the second predetermined value 210, which is the position of L4 while the rotation is continued without finding the position of the groove, the main control part 12 In order to forcibly stop the rotation of the disk to output a control signal to the disk drive unit 16. Thus, the disk stops for about two seconds. After the disk 8 is stopped, the main controller 12 uses the display unit 22 to display the failure occurrence externally. The time (2 seconds) is to eliminate the influence by the centrifugal force generated by the rotation of the disk (fourth step).

Thereafter, in the main control section 12, the disk 8 is rotated again in the forward direction A, which is the original direction. At the same time, the number of gear teeth is counted using the gear counter unit 20. When the number of gear teeth reaches the third predetermined value (the original position 120), the main controller 12 outputs a control signal to the disk drive unit 16 to stop the rotation of the disk 8 (step 5).

The length traveled at this time is measured using the number of teeth of the gear,

The first predetermined value 90-the second predetermined value 210 + the third predetermined value 120 become zero. Therefore, even if a failure occurs in the home position detecting unit 18 for detecting the home position, the disk 8 returns to its original position after rotating one revolution. Therefore, even if a failure occurs, there is no twist in the wiring. (-) Here indicates that the direction is reversed.

The predetermined value of the number of gear teeth is not limited to the numerical value described above because it may be changed depending on the number of installation of the pizza box. This is particularly acceptable as long as the total number of teeth left, right and left again is equal to zero.

As described above, according to the present invention there is an advantage that can prevent the twisting of the wiring connected to the lower side even when a failure occurs in the home position detecting unit for detecting the position of the groove of the pizza vending machine. It is also effective to find the location of the groove most efficiently.

Although the invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that modifications and variations can be made within the spirit and scope of the invention, and such modifications or changes will fall within the scope of the appended claims. .

Claims (4)

Main control unit 12 for controlling the entire circuit, pizza sensor unit 14 for detecting the presence of pizza, disk drive unit 16 for driving the motor in both directions, home for sensing the home position In a pizza vending machine comprising a position detecting unit 18, a gear counter unit 20 for counting the number of teeth of a gear moved by a motor, and a display unit 22 for displaying an operation state on the outside, A first step of rotating the disk 8 to find the position of HOME, counting the number of gear teeth, and stopping the rotation of the disk 8 if the position of the groove is found; A second step of stopping rotation of the disk 8 when the number of gear teeth counted in the first step is a first predetermined value; Rotating the disk 8 to find the position of the groove, counting the number of gear teeth, and stopping the rotation of the disk 8 when the position of the groove is found; A fourth step of displaying a home position error indication and stopping the disk 8 if the number of gear teeth counted in the third step is a second predetermined value; And a fifth step of turning off the disk motor after turning the disk 8 left until the number of gear teeth reaches a third predetermined value. The method of claim 1, wherein the sum of the first predetermined value, the second predetermined value, and the third predetermined value of the method is zero. The method of claim 1, wherein the disc stop time in the second step and the fourth step is 2 seconds each. The method of claim 1, wherein the first predetermined value, the second predetermined value, and the third predetermined value are 90, 210, and 120, respectively.