JPH0219893Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a product dispensing device for a vending machine, particularly to a product dispensing device for dispensing beverages in small paper packs.

[Conventional technology]

As the above-mentioned product delivery device, Japanese Patent Application Laid-Open No. 59-105199
A product unloading device (hereinafter referred to as a direct stacking flapper type unloading device) described in this report is known.

[Problem that the invention attempts to solve]

As will be described later, in this direct-loading flapper type unloading device, due to deformation of the products to be transported, etc., the products do not fall smoothly, and it takes time for the products to fall. Therefore, the product is caught between the flapper that has begun to close and the unloading device casing, and as a result, the motor becomes locked.

In conventional unloading devices, when the motor becomes locked as described above, a protection circuit is provided to protect the motor, which cuts off the power to the motor after being energized for a predetermined period of time after the motor becomes locked. When necessary, external signs such as ``sold out'' or ``sold out'' are displayed. Therefore, from now on, even if there are products remaining in the delivery device, they will not be able to be sold.

An object of the present invention is to provide a product delivery device that does not cause the above-mentioned troubles.

[Means for solving the problem] The present invention includes a product storage section extending in the vertical direction, a product takeout port connected to the lower part of the product storage section, and a product outlet provided in the center of the product storage section and extending in the vertical direction. an extending rotating shaft; a motor for rotating the rotating shaft;
The above-mentioned product storage section and the product take-out port are separated from each other by facing each other across the rotation shaft at the bottom end of the product storage section, and rotates vertically to open and close the bottom end of the product storage section. It has a pair of flappers that are arranged so that the flappers can be rotated, and a rotation control plate that regulates the rotation of the flappers in accordance with the rotation of the rotating shaft, and the products stacked on each of the flappers are controlled by the opening operation of the flapper. Accordingly, in a product dispensing device of a vending machine in which the product is dropped into the product takeout port, there is provided a detection switch for detecting whether or not the rotating shaft is in the standby angular position, and a detection switch that detects the non-standby angular position from the detection switch. The automatic motor is characterized by comprising a control circuit that turns off the motor for a predetermined period of time when a signal indicating the motor is continuously received for a predetermined period of time, and the control circuit performs the off operation at least once. This is a product delivery device for a vending machine.

[Effect]

In the present invention, when the rotary shaft is rotated from the standby angle position by the drive of the motor and the product is dropped and carried out by the opening operation of the flapper, by the time the rotary shaft reaches the standby angle position from the standby angle position, When a signal indicating a non-standby angular position of the rotating shaft is continuously received from the detection means for a predetermined period of time, the control circuit turns off the drive of the motor for a predetermined period of time. That is, when the flapper is in the locked state, the motor is turned off for a predetermined period of time. Then, this off operation is performed at least once.

〔Example〕

The present invention will be explained below using examples.

First, referring to FIGS. 5a and 5b, the structure of the product delivery device will be described. Reference numeral 11 is a column body having a substantially U-shaped cross section and an open front and bottom surface;
Reference numeral 12 denotes a column middle plate arranged at the center of the column body 11 and forming a side wall. The column middle plate 12 divides the column body 11 into a part where products are stored and a part into which a rotating shaft is inserted, as will be described later. A product storage section 1 is formed by the column body 11 and the column middle plate 12. Although not shown, the product storage section 1 is connected to a product outlet.

A rotating shaft 2 extending vertically is inserted into the center of the product storage section 1, and is pivotally supported at the upper and lower ends of the product storage section 1, although not shown. This rotating shaft 2 is connected to a motor 3 provided at the top of the product storage section 1, and rotates in a predetermined direction.
A front plate 13 is fixed to the front lower part of the column body 11, and the rear plate of the column body 11 and the corresponding front plate 13 have flapper shafts 4 and 4 extending in the front-rear direction within the product storage section 1. ' is the rotation axis 2
is located close to. Flappers 5 and 5' are provided on the flapper shafts 4 and 4', respectively, so as to be rotatable about these shafts. At the bottom of the rotating shaft 2, there are flat flaps 5, 5' in a horizontal state.
A substantially fan-shaped rotation control plate 6 is placed in contact with the lower surface of the
is provided. The rotation control plate 6 drives the flappers 5 and 5' as the rotation shaft 2 rotates.

Separators 7 and 7' are rotatably supported above flappers 5 and 5'. The separators 7 and 7' are provided at positions corresponding to the products directly above the products 8 and 8' on the flappers 5 and 5' that are on standby for sale. Slightly below the shaft supports of the separators 7 and 7', a separator cam 9 having a substantially semicircular plate shape is fitted onto the rotating shaft 2 and fixed with screws. The separator cam 9 alternately rotates the separators 7 and 7' as the rotating shaft 2 rotates.

Next, the unloading action of the above-mentioned unloading device will be explained.

In the sales standby state, in response to a sales signal based on the insertion of a predetermined coin, the motor 3 is energized, and the rotation shaft 2
Rotation control plate 6 and separator cam 9
is rotated in the direction of the arrow in FIG. 5b. At a rotation angle slightly before the rotation control plate 6 separates from the flapper 5, the separator 7 is rotationally driven upward by the separator cam 9, and the product 8'' directly above the product 8 is sandwiched between it and the right side plate of the column body 11. It starts to get crowded.
As shown in FIGS. 6a and 6b, when the rotating shaft 2 rotates 90 degrees from the initial position (standby angle position), the flapper 5 is released from the locked state and rotates downward about the flapper shaft 4. , the product 8 placed on the flapper 5 is dropped and carried out.

However, the product 8'' directly above it does not fall because it is pressed between the separator 7 and the right side plate of the column body 11.The rotation control plate 6 and separator cam 9 continue to rotate, and the product 8'' is shown in FIGS. 7a and 7b. As shown,
Stops at a position rotated 180° from the initial position (standby angle position). At this time, the flapper 5 is also pushed up and returned to its original horizontal position as the rotation control plate 6 rotates, and the separator 7 rotates downward as the separator cam 9 rotates. Then, the next product 8'' and the product above it are released from the sandwiched state and slip onto the returned flapper 5. When the next sales signal arrives, the product 8' is dropped and carried out by the same operation.

By the way, in the case of beverages in paper packages, the 6th
As shown in Figures a and b, the product 8'' directly above the product 8 is deformed by being pressed by the separator 7. In this case, the lower end of the product 8'' bulges outward as shown in the figure, and as a result, the product 8'' The resistance when unloading the product 8" increases. Due to this increase in resistance, the product 8"
The fall of the product 8'' may be delayed, and the product 8'' may not be able to fall within the time that the flapper 5 is open, resulting in the product 8'' being caught between the flapper 5 and the right side plate of the column body, as shown in Figure 8 a and b. be.

Here, with reference to FIG. 1, a control device used in this unloading device will be explained.

As shown, the control device includes timers 14 and 15, a decoder 16, a counter 17, and a flip-flop 18.

The output terminal of an OR gate 15a is connected to the B terminal of the timer 15, and the aforementioned sales signal (start signal) is input to one of the input terminals of this OR gate 15a. Timer 15 CD and T ₂
The terminal is set to high (H) level, and the _T1 terminal is grounded. And the Q terminal is the timer 14
is connected to the B terminal of the The A terminal of the timer 14 has a standby position (regular position) of a flapper, which will be described later.
That is, a flapper fixed position signal indicating the standby angular position of the rotating shaft is input. The CD and _T2 terminals are set to high level, and the _T1 terminal is grounded.

The Q terminal of the timer 14 is connected to the A terminal of the decoder 16, and the terminal is further connected to the E terminal of the decoder 16. Further, a flapper fixed position signal is input to the B terminal of the decoder 16. The _Q1 terminal of the decoder 16 is connected to the other input terminal of the OR gate 15a, and the Q1 terminal of the decoder 16 is connected to the other input terminal of the OR gate 15a.
is connected to the CE terminal of the On the other hand, decoder 1
The Q ₃ terminal of the flip-flop 18 is connected to one of the input terminals of the OR gate 17a and the CL terminal of the flip-flop 18.

_Q2 terminal of counter 17 is OR gate 17a
and the other input terminal of flip-flop 18.
Connected to CP terminal. The output terminal of the OR gate 17a is connected to one of the input terminals of the OR gate 17b, and a low (L) level is always input to the other input terminal of the OR gate 17b. The output terminal of the OR gate 17b is the CL of the counter 17.
terminal, and the CP terminal is grounded. Note that the D terminal of the flip-flop 18 is set to a high level, and the PR terminal is grounded.
In addition, as will be described later, a restart signal for the motor 3 and an OR gate 1 are output from the _Q1 terminal of the decoder 16.
Reset signal from 7b, flip-flop 18
Trouble detection signals are taken out from the Q terminals of each.

As described above, the motor 3 is energized by the sales signal (start signal) based on the insertion of a predetermined coin in the sales standby state. This start signal is a pulse signal that changes from H level to L level, and is applied to OR gate 15a. In response to this start signal, the timer 15 sends out an H level pulse signal from the Q terminal after a predetermined time (6 seconds in this case).

On the other hand, when the rotary shaft 2 starts rotating from the standby angle position due to the rotation of the motor 3, the rotation of the rotary shaft 2 is detected by the detection switch 2a. That is, as shown in FIG. 2a, when the rotating shaft 2 begins to rotate, the flapper fixed position signal a sent from the detection switch 2a changes from the H level, which is a signal indicating the standby angular position, to the non-standby angular position. The signal becomes L level. That is, detection switch 2
Whether or not the rotating shaft 2 is in the standby angular position is detected by a. For example, a cam switch is used as the detection switch 2a.

Normally, the rotating shaft starts within 6 seconds after the start signal is input, that is, the motor 3 starts.
It rotates 180 degrees and returns to the standby angle position, so
The home position signal changes from L level to H level. Timer 1 starts when the fixed position signal reaches H level.
Since the H level signal is input to the B terminal of 4,
The pulse signal shown in Figure 2b is output from the Q terminal (hereinafter this signal is referred to as the time-up signal).
Note that this time-up signal is sent out for a predetermined period of time (in this case, one second). At this time, the terminal is L
Moreover, since a fixed position signal of H level is applied to the B terminal of the decoder 16, the signal from the Q ₁ terminal of the decoder 16 is L level, Q ₃
An H level is output from the terminal. counter 1
When the L level is input to the CE terminal of the counter 17, the L level is output from the _Q2 terminal of the counter 17.

Since an H level is output from the _Q3 terminal of the decoder 16, a pulse signal (hereinafter referred to as a reset signal) shown in FIG. 2d is output from the output terminal of the OR gate 17b, and the unloading device is reset.
Furthermore, the H level from the _Q3 terminal of the decoder 16 is input to the CL terminal of the flip-flop 18.
In this case, regardless of the state of the CP terminal, the output from the Q terminal is at L level as shown in FIG. 2e.

Referring also to FIGS. 3a to 3e, as mentioned above, if a product is caught between the flapper 5 and the column body 11, the motor 3 will be in a locked state, and even after 6 seconds have elapsed, The rotating shaft does not return to the standby angle position. That is, the H level signal is input to the B terminal of the timer 14 while the home position signal is at the L level.
As a result, a one second time-up signal is sent from the Q terminal of the timer 14.

The E terminal of the decoder 16 is at L level, and the B terminal is at L level.
When the A terminal becomes H level, the _Q1 terminal becomes H level and the _Q3 terminal becomes L level. When a predetermined number of pulses (four in this case) are applied to the Q2 terminal of the counter ₁₇ , the CE terminal
It is set to change from L level to H level. Therefore, when only one pulse signal is applied to the CE terminal, the _Q2 terminal is at L level. As a result, the output terminal of OR gate 17b and the Q terminal of flip-flop 18 are at L level. That is, neither the reset signal nor the trouble detection signal is output.

By the way, as mentioned above, the motor 3 stops for only one second in response to the H level of the restart signal. Further, the restart signal is input to the OR gate 15a as described above. Therefore, when six seconds have elapsed since the restart signal was inputted to the B terminal of the timer 15, an H level signal is sent from the Q terminal of the timer 15. If the rotary shaft 2 has returned to the standby angle position at this point, the output terminal of the OR gate 17b becomes H level, and the counter 17 is reset, as described above. Further, the Q terminal of flip-flop 18 is at L level.
That is, no trouble detection signal is output.

Referring to FIGS. 4a to 4e, if the motor 2 remains locked for a long time and the time-up signal is output four times, the _Q2 terminal of the counter 17 will go to H level, as is clear from the above explanation. As a result, the Q terminal of flip-flop 18 becomes H level. That is, a trouble detection signal is output. Further, the output terminal of the OR gate 17b becomes H level, which is applied to the CL terminal of the counter 17, causing the counter 17 to be reset.

As is clear from the above, the timer 14 and the decoder 16 turn off the motor 3 for a predetermined period of time when the signal indicating the non-standby angular position is continuously received from the detection switch 2a for a predetermined period of time. Configure the control circuit.

In the above-mentioned unloading device, when the motor 3 becomes locked, that is, when the product is caught between the flapper 5 and the column body 11, the power to the motor 3 is temporarily cut off. Then, by stopping the motor 3,
The driving force applied to the rotating shaft 2 is cut off. In this state, one end of the rotation control plate 6 presses the flapper 5 against the product 8, as shown in FIGS. 8a and 8b. On the other hand, the component force of the weight of the product 8 and the restoring force of the product 8 act on the rotation control plate 6 via the flapper 5 as a force in the reverse direction. At this time, since the motor 3 is in a stopped state, that is, no rotational force is generated in the motor 3, the motor 3 and the rotating shaft 2 are slightly reversed. As a result, the flapper 5 is pushed back slightly, the distance between the flapper and the column body is widened, and the product is dropped and carried out. In addition, even if the product does not fall out when the motor 3 is turned off once, the power to the motor is cut off four times in total, so the product will not fall and be carried out even if the motor 3 is stopped once, and the product will not be carried out normally. Even if it does not return, the same action has been repeated four times, so the probability of falling and being carried out can be increased accordingly. Furthermore, if the product does not fall and are not carried out even after stopping the motor a predetermined number of times, for example four times, an abnormality is detected, so that an abnormality in the carrying out device can be immediately detected.

[Effect of idea]

As explained above, according to the present invention, when a product is caught between the flapper and the product storage housing, since the motor is temporarily stopped, the flapper is pushed back by the weight of the product, etc. The gap between the flat flap and the product storage housing is widened, and the product is dropped and carried out. Therefore, troubles such as products not being delivered as in the past are less likely to occur.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a control device for a product discharging device according to the present invention, and FIGS. 2 to 4 show waveforms of various parts of the control device shown in FIG. Figures 5a and 5b are front views and sectional views taken along line A-A' of the product carrying device according to the present invention, Figures 6a, 7a, and 8 are diagrams showing changes. a is a partial front view showing the operation transition of the product delivery device shown in FIG. 5a;
6b, 7b and 8b are sectional views taken along the line A-A' of FIGS. 6a, 7a and 8a. 1...Product storage unit, 2...Rotating shaft, 3...Motor, 4, 4'...Flapper shaft, 5,5'...Flapper, 6...Rotation control plate, 7,7'...Separator ,
8, 8', 8''...Product, 9...Separator cam,
11...Column body, 12...Column middle plate, 13
... Front plate, 14 ... Timer, 15 ... Timer, 16 ... Decoder, 17 ... Counter, 1
8...Flip flop.

Claims (1)

[Scope of utility model registration request] A product storage section extending in the vertical direction, a product takeout port connected to the lower part of the product storage section, a rotating shaft provided at the center of the product storage section and extending in the vertical direction, and a rotating shaft for rotating the rotating shaft. The motor is arranged to face the lower end of the product storage part with the rotating shaft in between so as to partition the product storage part and the product take-out port, and to open and close the lower end of the product storage part. A pair of flappers provided rotatably in the vertical direction, and a rotation control plate that regulates the rotation of the flappers in accordance with rotation of the rotation shaft, and the products are stacked on each of the flappers. In the product dispensing device for a vending machine, the product is dropped into the product takeout port by the opening operation of the flapper, and a detection switch detects whether or not the rotating shaft is at a standby angle position; a control circuit that turns off the motor for a predetermined time when a signal indicating a non-standby angular position is continuously received from the detection switch for a predetermined time; A product dispensing device for a vending machine that is characterized in that it can be carried out only once.