JPS639022Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a safety device for a product dispensing device.

BACKGROUND ART Vending machines that handle bottled or bagged products are equipped with a safety device as shown in FIG. A product detector 2 is provided at the bottom of a product take-out section 1 from which products are discharged from a dispensing device 3. When the product 4 is delivered from the delivery device 3 to the product take-out section 1 via the chute 5a, 5b, the movable bottom plate 6 constituting the product detector 2
is rotated around the pin 7 to the imaginary line position by the weight of the delivered product. Micro switch 8
When the product is detected and remains on the movable bottom plate 6, dispensing of the next product by the dispensing device 3 is prohibited, and the dispensing product and the next dispensing product collide with each other in the product dispensing section 1. This prevents accidents that could result in damage.

Problems to be solved by the invention This conventional configuration has the following problems.

Dust that naturally enters from the outside through the product removal port 9 accumulates between the bottom plate of the product removal section 1 and the back surface of the movable bottom plate 6, and the rotation of the movable bottom plate 6 is obstructed by the accumulated dirt, making it impossible to move. The return of the bottom plate 6 becomes difficult. In this case, even though there is no product remaining on the movable bottom plate 6, it is detected as if there is a product remaining, and the next product cannot be dispensed.

The object of the present invention is to provide a device that allows the dispensing of the next product to be resumed even if the return of the movable bottom plate is impaired due to dirt that has naturally entered from the outside.

Means for Solving the Problems The safety device of the vending machine of the present invention detects when an article of a predetermined weight or more is placed at the bottom of the product takeout section that receives the product dispensed from the product dispenser. A detector is provided, and a memory is provided that is set each time a payout instruction signal instructing the product payout device to execute the payout of the product is generated to prohibit generation of the payout instruction signal the next time, and is triggered by the payout instruction signal. A timer is provided to detect the passage of a certain period of time, and the memory is reset by the earlier of the signal from the product detector indicating that the product is removed from the product removal section and the time-up signal of the timer. It is characterized by being configured to do so.

Effect: According to this configuration, when the product detector no longer returns, the memory is reset by the time-up signal of the timer, and the next product payout is restarted.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. Components having the same functions as those in FIG. 1 will be described with the same reference numerals.

Reference numeral 10 denotes a sales control unit which generates a product payout instruction signal A when product payout is executed based on the input money and the selling price, etc. Each time the payout device 3 detects this product payout instruction signal A [FIG. 3a], It is configured to discharge product 4. Reference numeral 11 denotes an R-S flip-flop as a memory, which is set at the fall of the product delivery instruction signal A, and in the set state acts to inhibit the next sales operation of the sales control section 10. Reference numeral 12 denotes a monomulti that can be re-triggered as a timer triggered by the product delivery instruction signal A, and returns to a stable state upon detecting the elapse of a specified time T. 13 is the output Q of the mono multi 12 [3rd
Figure b] and the output of micro switch 8 [Figure 3 c]
to detect the preceding falling edge.
In the AND gate, the output [Fig. 3 d] is the R−S
It is connected to the reset terminal of flip-flop 11.

With this configuration, when the product detector 2 operates normally, the R-S flip-flop 1
1 [Fig. 3 e] is output from the AND gate 1 at timing t ₁ when the product 4 is taken out from the product take-out section 1.
It is reset with 3 outputs.

If the movable bottom plate 6 does not return due to the influence of dust, the output of the AND gate 13 should fall immediately when the product 4 is taken out at timing _t2 under normal conditions, but the output of the micro switch 8 will be reversed. Therefore, at timing _t3 when the monomulti 12 detects that the specified time T has elapsed, the output of the AND gate 13 falls and the R-S flip-flop 11 is reliably reset, making it ready for dispensing the next product. Automatically return.

Effects of the invention As described above, according to the invention, even if the product detector malfunctions, when the timer detects that a certain period of time has elapsed, the next product dispensing prohibition state is reset. This eliminates such excessive safety-ensuring actions, prevents a decline in sales, and improves practicality.

[Brief explanation of drawings]

Figure 1 is a side sectional view of a conventional vending machine, Figure 2
The figure is a block diagram of one embodiment of the present invention, and FIG. 3 is a block diagram of the main part of FIG. 2. 1...Product extraction unit, 2...Product detector, 3...
Dispensing device, 8... Micro switch, 10... Sales control unit, 11... R-S flip-flop [memory], 12... Monomulti [timer], 13...
AND gate, A...Product delivery instruction signal.

Claims (1)

[Scope of utility model registration request] A product detector is provided at the bottom of a product dispensing unit that receives the product dispensed from the product dispensing device to detect when an article of a predetermined weight or more is placed, and a dispensing instruction is provided to instruct the product dispensing device to execute dispensing of the product. A memory is provided which is set each time a signal is generated to prohibit the next occurrence of the payout instruction signal, and a timer is provided which is triggered by the payout instruction signal to detect the elapse of a certain period of time, and the memory is set to prevent the next generation of the payout instruction signal. A safety device for a vending machine configured to reset the vending machine by the leading one of a signal indicating that a product is removed from a product take-out section and a time-up signal of the timer.