JPH0114632B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a product dispensing device, particularly a flapper dispensing type product dispensing device.

Conventional technology Conventionally, this type of product dispensing device is shown in Figs. 4 to 8.
It is configured as shown in the figure. FIG. 4 is a longitudinal cross-sectional view of the product dispensing device. Reference numerals 1 and 2 are first and second pedestals supported by shafts 3 and 4, respectively, and both pedestals 1 and 2 can be rotated downward. It is regulated by a single cam plate 5. The cam plate 5 has a semicircular shape and is fixed to the tip of the camshaft 6 so that it can rotate horizontally. 7 is the first column of products stacked on the first pedestal 1; here, from the bottom to the top are ₁ , ₂ ,
₃ Add a sign to it. 8 is the second column of products stacked on the second pedestal 2; similarly, ₁ ,
Label them ₂ , ₃ , etc. 9 and 10 are the first and second
With the stopper, the second product from the bottom of the first and second columns is pushed out by the cam body 11 fixed to the camshaft 6 against the stocker wall surface 12 side, and supports the second and more stacked products. are doing. Reference numeral 13 denotes a product outlet provided in the front door 14 of the vending machine body, and 15 a table located below the first and second columns, the tip of which extends near the product outlet 13. 16 is a bar conveyor on which bars 17 are installed at appropriate intervals, and table 1
A path bar 17 passes over the table 15 so that the products 7 and 8 that have fallen onto the table 15 are pushed out by the bar 17 toward the product takeout port 13 [in the direction of arrow A].

The rotation of the camshaft 6 is driven as follows by a motor [not shown], a stop cam [not shown] attached to the camshaft 6, and a cam switch [not shown] that detects the state of this stop cam. is controlled by. In addition, the first and second columns 2
The following description assumes that products 7 and 8 of Nos. 1 and 22 are the same product, and that product payout is executed from the first column 21 or the second column 22 each time a payout instruction is detected.

FIG. 6 shows the states of the first and second cradle ₁ , 2 and the cam plate 5 in the process of dispensing 1 when the first dispensing instruction is detected and ₁ when the second dispensing instruction is detected.
FIG. 6a shows the initial state of FIGS. 4 and 5. FIG. The cam plate 5 that detects the first payout instruction rotates 90 degrees clockwise as shown in Figure 6b, and the first
The cradle 1 and the cam plate 5 are disengaged. Note that when the cam plate 1 rotates 90 degrees and the first pedestal 1 rotates downward in this way, the second product ₂
As shown in FIG. 7, the stocker wall 12 is pressed by the cam body 11, and when the first pedestal 1 rotates downward, only the product ₁ falls. table 11
The product ₁ that fell onto the table 15 is moved along the arrow A by the bar conveyor 16 which has started normal rotation.
The bar conveyor 16 is then fed to a position facing the product take-out port 13, and the drive of the bar conveyor 16 is completed.

When the dispensing of the product ₁ is completed in this way, the cam plate 5 is further moved as shown in FIGS. 6b to 6c.
The first pedestal 1, which had been rotated 90 degrees and rotated downward, is pushed up, and the product ₂ is released from being pressed by the cam body 11. When the second dispensing instruction is detected, the cam plate 5 moves as shown in FIGS. 6c to 6d.
After rotating 90 degrees, the second pedestal 2 and the cam plate 5 are disengaged, and _{the product 1 falls} onto the table 15 as shown in FIG.
6, and returns to the initial state shown in FIG. 6a.

Problems to be Solved by the Invention In _such a conventional configuration, as shown in FIG. This problem does not occur if the product 8 is large and has an increased weight, but the second pedestal 2
If the length L ₂ of the vending machine becomes longer, or if the table 15 and bar conveyor 16 are forced to be placed closer to the stocker body due to height restrictions of the vending machine body, the distance L ₁ becomes longer. Figure 9
When it becomes narrow compared to the size of product 8 like L ₁ ′,
Depending on how the product 8 falls, the product 8 may be pushed up by the bar 17 of the bar conveyor 1, which rotates in the normal direction, and become caught between the open second pedestal 2 and the table 5, causing the bar conveyor to fall. 16 may not move in the direction of arrow A, and product delivery may become impossible. This is a serious problem that occurs particularly for the products 8 in the second column, which is on the upper side with respect to the conveyance direction [arrow A direction] of the bar conveyor 16, among the first and second columns. The current situation is that ₁ must be made sufficiently large compared to product 8.

The present invention aims to provide a product dispensing device for a vending machine that can automatically recover from the abnormal state and perform normal dispensing even if the interval L ₁ is set close to the size of the product even if a product is caught. purpose.

Means for Solving the Problems The product dispensing device for a vending machine of the first invention has the following features:
The rotation of the first and second pedestals, each end of which is pivoted so as to be able to rotate downward, is controlled by a semicircular shaped pedestal that is pivoted to horizontally rotate at a position below the first and second pedestals. The cam plate is supported and regulated by a single cam plate, and the cam plate is rotated by a predetermined angle to release the contact between the cam plate and one of the first and second pedestals. A bar conveyor configured to dispense products from the first or second column, arranged along the arrangement direction of the first column and the second column, and conveying the dispensed products to a product takeout port. and an overcurrent detection unit that detects that an overcurrent has flowed through the drive motor of the bar conveyor, and when the overcurrent detection unit detects an overcurrent state, switches the current supply circuit to the drive motor to reverse the bar conveyor. The invention is characterized in that it is further provided with a recovery means for normal rotation operation after the rotation.

A second aspect of the present invention is to control the rotation of the first and second pedestals, each of which is pivoted at one end so as to be able to rotate downward.
The second pedestal is supported and regulated by a single semicircular cam plate which is pivoted to horizontally rotate at a position below the second pedestal, and the cam plate is rotated by a predetermined angle to separate the first and second pedestals. The structure is configured such that the product in the first or second column stored on the pedestal is dispensed by releasing the contact between one of the cam plates and the cam plate, and the first column and the second column
a bar conveyor arranged along the arrangement direction and conveying the products to the delivery port; a photoelectric device arranged so that the detection light traverses the conveyance path to the product delivery port; a timer that is set to a specified time longer than the required time and that is reset when the photoelectric device detects the passing of a product; and a circuit that energizes the drive motor of the bar conveyor when the timer detects that the specified time has elapsed. The bar conveyor is characterized in that it is provided with a recovery means for switching the bar conveyor to reverse rotation and then causing the bar conveyor to operate in normal rotation.

Effect According to the configuration of the first invention, when a product is caught, an overcurrent flows to the drive motor of the conveyor. The overcurrent detection unit detects this, and the recovery means operates the conveyor in reverse, sweeps the lower part of the product away from the product take-out port, and then causes the conveyor to run in the normal direction again so that the product returns to the product take-out port. transported.

According to the configuration of the second invention, when a product is caught, the product does not cross the detection light of the photoelectric device within the specified time of the timer, so the timer is not reset within the specified time, and the product does not cross the detection light of the photoelectric device within the specified time of the timer. Detect the progress of When the timer detects that the specified time has elapsed, the recovery means operates the conveyor in reverse, sweeps the lower part of the product that is being bitten away from the product removal port, and then operates the conveyor in normal rotation again to remove the product. transported to the mouth.

Embodiments Hereinafter, embodiments of the present invention will be described based on FIGS. 1 to 3. Components having the same functions as those in FIG. 4 are given the same reference numerals and their explanations will be omitted. The spacing is set to L ₁ ', which is the same as in FIG. 9, where there is a risk of jamming.

First, the first invention will be explained. Reference numeral 18 denotes an overcurrent detection section, which is connected in series to the power supply circuit of the DC motor 19 that drives the bar conveyor 16. Reference numeral 20 denotes a dispensing control section, which detects an external energization instruction such as a discharging instruction J generated in conjunction with the drive of the camshaft 6 during normal dispensing, and becomes conductive for a specified time. The recovery means is composed of a polarity switching section 21 and a recovery control section 22, and the polarity switching section 21 normally rotates in the normal direction at the time of dispensing, and applies a polarity voltage that causes the products 7 and 8 on the table 15 to be conveyed in the direction of arrow A. is applied to the motor 19. The recovery control unit 22 receives the overcurrent detection signal K from the overcurrent detection unit 18 and instructs the payout control unit 20 and the polarity switching unit 21 to perform recovery processing.

FIG. 2 shows a flowchart of the payout control section 20. In other words, when a carry-out instruction J occurs during normal dispensing, it is sent to [a-2] via [a-1].
Then, the power supply voltage Vcc having the polarity in the forward rotation direction is applied to the motor 19 via the polarity switching section 21. In [a-3], the internal counter
Increment CNT ₁ , check whether the content reaches the value W ₁ corresponding to the specified time in [a-4], and continue until a match is detected in [a-4] [a-2] → [a-3] → [a-4] The routine is repeatedly executed to rotate the bar conveyor 16 in the normal direction and deliver the product 7 or 8 on the table 15 to the product takeout port 13. When a match is detected in [a-4], the power to the motor 19 is turned off and the bar conveyor 16 is stopped in [a-5].

FIG. 3 shows a flowchart of the recovery control section 22. In other words, if the product ₁ is caught between the second pedestal 2 and the table 15 as shown by the solid line while the dispensing control unit 20 is executing normal dispensing, and an overcurrent flows through the motor 19, the recovery control unit 22 So,
Internal counter at [b-2] via [b-1]
CNT ₂ is incremented, and in [b-3] it is checked whether the contents have reached the count value N ₂ corresponding to the predetermined duration time. If a match is detected in [b-3], the above-mentioned bit is incremented. It is determined that a problem has occurred [b
-4] Execute the reverse processing. In [b-4],
First, the energization being executed in the payout control unit 20 is turned off, the polarity switching unit 21 is instructed to change the polarity, and the payout control unit 20 is instructed to be energized for a predetermined time t ₁ . As a result, the product ₁ that is being bitten is driven in reverse by the bar conveyor 16 _.
The lower part is swept away by the bar 17a on the lower side to avoid being caught and fall onto the table 15 as shown by the imaginary line. When the energization for the predetermined time _t1 is completed, then in [b-5], the polarity switching section 21 is returned to its original state, and the contents of the counter _CNT2 and the counter _CNT1 of the payout control section 20 are reset. At [b-6], a signal corresponding to the unloading instruction J is output to the dispensing control unit 20, and at [a-2] →
By the normal rotation of the bar conveyor 16 according to the routine [a-3] → [a-4], product ₁ is delivered to the bar 17b.
is delivered to the product takeout port 13.

In the first invention described above, the overcurrent detection section 18 is provided for detecting the product being caught, and the recovery control section 22 and the polarity switching section 21 are provided as recovery means, but this is the second invention described below. A similar effect can be obtained by detecting the product being bitten in the following manner. In other words, the photoelectric device 23 is installed so that the detection light crosses the tip of the table 15 as shown by the imaginary line in FIG. 1, and as shown in FIG. A timer 24 is set for a specified time longer than the required time, and the timer 24 is normally reset within the specified time by the photoelectric device 23 detecting the product. If the photoelectric device 23 does not detect the passing of the product within a specified time after the product is caught, the timer 24 detects the time-up and the recovery control means 22 performs the steps [b-4] to [shown in FIG. 3]. b-6],
Recovery processing is performed. Note that the other configurations and operations are the same as those of the first invention, so their explanations will be omitted.

Effects of the Invention As explained above, according to the first invention, in the product dispensing device of the flapper dispensing method for dispensing products to the product dispensing port by a conveyor, the overcurrent detection unit detects that an overcurrent flows to the drive motor of the conveyor. When detected, the recovery means reverses the conveyor and then operates the conveyor in the normal direction. Therefore, even if a product is caught between the lower end of the open pedestal and the table that receives the product that has fallen from the stocker body, the conveyor will operate in the reverse direction. As a result, the jammed state is automatically released, and the product can be delivered to the unloading port by the subsequent forward rotation, and the distance between the lower end of the open pedestal and the table is smaller than the size of the product. It is possible to actually drive the vehicle without making it very large.

According to the second invention, in the product dispensing port device of the flapper dispensing method in which products are delivered to the product dispensing port by a conveyor, when the photoelectric device does not detect passage of the product, the timer detects the elapse of a specified time. Since the recovery means rotates the conveyor in the normal direction after reversing the conveyor, the conveyor will not operate in the reverse direction even if a product is caught between the lower end of the open pedestal and the table that receives the product that has fallen from the stocker body. The jammed state is automatically released, and the product can be delivered to the take-out port by the subsequent normal rotation. It is something that can actually be operated without having to make it very large.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of an embodiment of the first invention and its essential electrical circuit configuration diagram, Figs. 2 and 3 are flowcharts of the essential parts of Fig. 1, and Fig. 4 is a conventional product. A vertical cross-sectional view of the dispensing device, FIG. 5 is a view along the X-X arrow in FIG. 4, FIG. 6 is an operational explanatory diagram of the conventional product dispensing device, and FIG. and Fig. 8 is an explanatory diagram of Fig. 6, Fig. 9 is an explanatory diagram of product biting,
FIG. 10 is a diagram showing the main part of the second aspect of the present invention. DESCRIPTION OF SYMBOLS 1...First pedestal, 2...Second pedestal, 5...Cam plate, 6...Camshaft, 9, 10...First and second stoppers, 11...Cam plate, 13...Product outlet,
15...Table, 16...Bar conveyor, 17...Bar, 18...Overcurrent detection section, 19...Motor, 20...
Payout control section, 21...Polarity switching section, 22...Recovery control section, L1 _' ... Distance between the table 15 and the open end of the pedestal 2.

Claims (1)

[Scope of Claims] 1. The rotation of the first and second pedestals, one end of which is pivoted so as to be able to rotate downward, is controlled by pivoting the first and second pedestals so that they rotate horizontally at the lower positions of the first and second pedestals. The cam plate is supported and regulated by a single supported semicircular cam plate, and the cam plate is rotated by a predetermined angle to release the contact between the cam plate and one of the first and second pedestals. The first housed on the platform
or a bar conveyor configured to dispense the products in the second column, and arranged along the arrangement direction of the first column and the second column to convey the dispensed products to the product takeout port; an overcurrent detection unit that detects that an overcurrent has flowed through the drive motor of the bar conveyor, and when the overcurrent detection unit detects an overcurrent state, switches a current supply circuit to the drive motor to reverse the bar conveyor. A product dispensing device for a vending machine, which is provided with a recovery means for operating in normal rotation after the product is released. 2. The rotation of the first and second pedestals, each end of which is pivoted so as to be pivoted downward, is controlled by a semicircular shape which is pivoted to horizontally rotate at a position below the first and second pedestals. The cam plate is supported and regulated by a single cam plate, and the cam plate is rotated by a predetermined angle to release the contact between the cam plate and one of the first and second pedestals, and the cam plate is housed on the pedestal. 1st
or a bar conveyor configured to dispense the products in the second column, and arranged along the arrangement direction of the first column and the second column to convey the dispensed products to the product takeout port; , a photoelectric device arranged so that the detection light crosses the conveyance route to the product takeout port; and a photoelectric device that is set to a specified time longer than the normal delivery time and is reset when the photoelectric device detects passage of the product. A product of a vending machine equipped with a timer and a recovery means that switches the energizing circuit to the drive motor of the bar conveyor to reverse the bar conveyor and then operate the bar conveyor in the forward direction when the timer detects that a specified time has elapsed. Payout device.