JPS63244296A - Drawer opening circuit for cash register - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a cash register, and more particularly to a drawer opening circuit for a cash register that controls the opening of a drawer storing cash.

[Prior Art] In a cash register (ECR) that is installed in the sales floor of a store and performs the registration work of sold products, the sales amount and the sales amount of the sold products are displayed on the front of the housing 1, as shown by outside MrlJ in Fig. 4. A keyboard 2 is provided for inputting sales data such as the number of units sold, and a display section 3 displays the sales amount and total amount at the top.
A receipt issuing port 4 and a drawer 5 for storing cash are provided in the middle and lower parts.

The keyboard 2 includes a number key 6 for entering numerical data such as the sales amount and number of products sold, a department key 7 for inputting the department code of the product, and a total key 8 for calculating the total amount. It is set up.

In such a cash register, when the sales amount and department code of each sales item are entered sequentially using the number keys 6 and the department key 7, and finally the total key 8 is operated, the total amount is calculated. It is displayed on the display section 3 and the drawer 5 is automatically opened. Additionally, a receipt will be issued.

FIG. 5 is a schematic cross-sectional view showing the opening/closing mechanism of the drawer 5. As shown in FIG. FIG. 5(a) shows the elongated state, and FIG. 5(b) shows the open state. That is, the bottom surface 1 near the rear wall 1a of the housing 19
A locking plate 9 is pivotally supported by a shaft 10 on b, and a recess 11 and a claw portion 12 are formed on the outer periphery of the locking plate 9. Further, this locking plate 9 is biased counterclockwise by a coil spring 13. The claw portion 12 is engaged with a lock arm 14 pivotally supported on the bottom surface 1b, and this lock arm 14 is rotated by a solenoid 15. Furthermore, a locking portion 16 attached to the outer surface 5a of the drawer 5 is locked in the recess 10 of the locking plate 9. Furthermore, the il wall 1a of the housing 1
A spring 17 is interposed between the drawer 5 and the outer surface 5a of the drawer 5. Therefore, in this state, the locking portion 16 attached to the outer surface 5a of the drawer 5 is attached to the recess 1 of the locking plate 9.
1, the drawer 5 cannot be opened.

In order to open the drawer 5, the solenoid 15 is energized and the opening arm 14 is rotated clockwise. Then, the claw portion 12 is disengaged from the lock arm 14, and the locking plate 9 is rotated counterclockwise by the coil spring 13. Then, the locking portion 16 of the drawer 5 is released from the recess 11 of the locking plate 9. When the locking portion 16 is released from the recess 11 of the locking plate 9, the drawer 5 is moved to the left by the elastic repulsive force of the spring 17. That is, drawer 5
will be released. When the solenoid 15 is de-energized, the lock arm 14 returns to its original position. However, since the locking plate 9 is biased counterclockwise by the coil spring 13, the claw portion 12 is stopped in a state where it is disengaged from the lock arm 14, as shown in FIG. 2(b).

When closing the drawer 5 which has been opened once, the drawer 5 is pushed into the housing 1 by manual operation. Then, the locking portion 16 of the drawer 5 comes into contact with the recess 11 of the locking plate 9, causing the locking plate 9 to rotate clockwise. Locking plate 9
When the is rotated clockwise, the claw portion 12 engages the lock arm 14.
is locked.

Therefore, the state shown in FIG. 5(a) is reached, and the locking plate 9
The lock arm 14 prohibits rotation in the counterclockwise direction. As a result, drawer 5 becomes locked.

The drawer opening circuit of such a drawer opening/closing mechanism is the sixth
It is formed as shown in the figure, and a switching transistor 1 is connected to the current supply path of the drive coil 18 of the solenoid 15.
9 is inserted, and in response to the key operation of the total key 8 of the keyboard 2, a solenoid energization signal is applied to the base of the transistor 19, which remains at H level for a predetermined time T++.

Then, the solenoid 15 is activated and the drawer 5 is opened.

[Problems to be solved by the invention] However, the drawer 5 shown in FIGS. 5 and 6
The following problems still existed in the opening/closing mechanism and drawer opening circuit. That is, as shown in FIG. 5, the opening/closing mechanism of the drawer 5 includes a locking plate 9 having a recess 11 and a claw 12. Lock arm 14. It is composed of mechanical components such as a locking part 16 and a spring 17 attached to the drawer 5. In order to smoothly open and open the drawer 5, the transmission of motion between each component is controlled. This needs to be done with a certain amount of leeway. Therefore, even if the cash registers have the same specifications, there will be large variations in the time from when the solenoid 15 starts to be energized until the drawer 5 actually starts to open.

For example, there is a cash register machine where the drawer 5 actually starts working 40m5 after the start of electricity, while
There is a cash register that only starts to open after 60 ■$ has passed.

Therefore, the energization interval To of the solenoid energization signal applied to the transistor 19 is set to be long with some margin. However, the current value of the drive current flowing through the drive coil 18 of the solenoid 15 is 1 when the resistance of the drive coil 18 is 20Ω and the drive voltage Vo is 24V.
．． It becomes 2A. As a result, in a cash register machine where the drawer 5 begins to open after a short energization time, there is a problem in that power is wasted.

The present invention provides a drawer opening circuit for a cash register that can reduce power consumption by providing a detector that detects when the drawer actually starts to open, and immediately cutting off the energization of the solenoid when the drawer starts to open. The purpose is to

[Means for Solving the Problems] The present invention locks the drawer in a closed state with a locking mechanism in the housing, and drives the solenoid with a solenoid energization signal to activate the lock connected to the solenoid. In a cash register that releases a locking mechanism and opens a drawer using the elastic force of a spring, there is a detector inserted between the drawer and the gap that detects when the drawer is released from the locking mechanism, and a detector that detects when the drawer is released from the locking mechanism. and a logic circuit that cuts off the solenoid energization signal in response to the output separation signal.

[Function] With the drawer opening circuit of the cash register configured as described above, in order to open the drawer in the closed state,
When a solenoid energization signal is applied to the solenoid via a logic circuit, the solenoid is driven, and after a predetermined time period determined for each opening/closing mechanism, the locking mechanism is opened and the drawer is disengaged from the locking mechanism. Then, a 1 disconnection signal is input from the detector to the logic circuit, and the solenoid energization signal being applied to the solenoid is cut off.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a sectional view showing the drawer opening mechanism in the drawer opening circuit of the cash register according to the embodiment. The same parts as in FIG. 5 are given the same reference numerals. Therefore, the explanation of the overlapping parts will be omitted.

That is, in the drawer opening mechanism of this embodiment,
A microswitch 20 as a detector is attached to the bottom surface 1b of the housing 1 into which the drawer 5 is inserted, and a contact plate 21 is attached to the outer surface 5a of the drawer 5 that the plunger of this microswitch 20 comes into contact with. . and,
As shown in FIG. 2(a), the drawer 5 is closed and the engaging portion 16 of the drawer 5 is locked in the recess 11 of the locking plate 9 attached to the bottom surface 1b of the housing 1. , the plunger of the microswitch 20 and the abutment plate 21 abut to close the contact.

Note that when the drawer 5 performs opening/closing operations, the locking plate 9. Recessed portion 11 and claw portion 12 of locking plate 9, coil spring 13. Lock arm 14. Solenoid 15. Locking part 1
6. Each operation of the spring 17 is the same as the opening/closing mechanism shown in FIG. 5 described above.

FIG. 1 is a drawer opening circuit diagram in the drawer opening/closing mechanism configured as shown in FIG. 2. One end of the drive coil 18 of the solenoid 15 is connected to a +12V drive iI source terminal, and the other end is grounded via the collector-emitter of a switching transistor 19.

On the other hand, a solenoid energization signal a having a pulse width TII sent from an M8 section (not shown) in response to the key operation of the total key of the cash register is inputted to one input terminal of a Nant gate 22 as a logic circuit.

Further, one end of the microswitch 20 is connected to a +5■ control power supply terminal via a resistor 23, and is also connected to the other input terminal of the Nandt gate 22. Further, the other end of this microswitch 20 is grounded.

Further, the output terminal of the Nandt gate 22 is connected to the base of the transistor 19 via a resistor 24.

Next, the operation of the drawer opening circuit of the cash register constructed as described above will be explained using the time chart shown in FIG.

That is, time t! The previous drawer 5 is shown in Figure 2 (a).
As shown in FIG. 2, when the drawer 5 is inserted into the housing 1 to its normal position and closed, the locking portion 16 of the drawer 5 is inserted into the housing 1.
It is locked by the locking plate 9 of the micro switch 20.
is also closed.

Therefore, the signal level of the detachment signal inputted to the input terminal on the microswitch side of the Nant gate 22 is at L level. Furthermore, the solenoid energization signal a input to the other input terminal remains at H level. Therefore, the output signal C of the Nant gate 22 is at L level, and the transistor 19 is not conductive. As a result, drawer 5 is
Maintain the state shown in figure (a).

Next, when the total key on the keyboard is operated and the solenoid energization signal a output from a control section (not shown) changes to L level, the Nant gate 22 is established and the output signal C becomes H level. Therefore, the transistor 19 becomes conductive, and the drive current d is applied to the drive coil 18 of the solenoid 15.
begins to flow.

When the drive current d flows through the drive coil 18, the lenoid 15
is driven, the lock arm 14 rotates clockwise,
The claw portion 12 of the locking plate 9 is removed from the lock arm 12. Then, the locking plate 9 is rotated counterclockwise by the coil spring 13. Therefore, the locking portion 16 of the drawer 5 is attached to the locking plate 9.
The drawer 5 is released from the recess 11 and is moved to the left by the elastic repulsive force of the spring 17. That is, the drawer 5 is opened.

When the drawer 5 starts moving leftward at time t2, which is a time T1 elapsed from time t1, the contact of the microswitch 20 is opened. As a result, at time t1, the signal level of the withdrawal signal S input from the microswitch 20 to the Nantes gate 22 changes to H level. Therefore, the establishment of the Nant gate 22 is canceled, and the output signal C
becomes L level, the transistor 19 is cut off, and the drive current d of the drive coil 18 is also cut off.

When the drive current d is cut off, the solenoid 15 returns to its original state, and the lock arm 14 and locking plate 9 move as shown in FIG. 2(b).
The state shown in is reached.

Then, a time t when a predetermined time To has elapsed from the time t1
Solenoid energization signal a sent from the control unit at 3
returns to its original H level.

When the drawer 5 is opened and the predetermined amount of money exchanged with the customer for the total amount is completed, the cashier pushes the drawer 5 into the cylinder 1 at time t4, and as described above, the drawer 5 is engaged. It is locked in the recess 11 of the locking plate 9 at the stop 16 . Therefore, the microswitch 20 closes and the withdrawal signal returns to its original L level.

In the cash register drawer opening circuit configured in this way, when the drawer 5 actually starts to open, the microswitch 20 is opened, the 1Ilvt signal is sent out, and the drive type ld of the solenoid 15 is shut off. be done. Therefore, when the solenoid 15 is actually energized, fllTt can be set to the minimum required time from the start of energization until the drawer 5 starts to open. Moreover, at this time 11Tt
If the mechanical operating time of the opening/closing mechanism of the drawer 5 changes due to variations in the quality of the opening/closing mechanism of the drawer 5 due to a change in the cash register, the minimum time T of the opening/closing mechanism in question changes.
! become. Therefore, as shown in FIG.
The output specified by the solenoid energization signal a sent from part 1! ! Compared to TRfilTa, the actual energization time T! can be significantly shortened.

As a result, power consumption can be significantly reduced by shortening the energized FR period of the solenoid 15.

Further, the actual energization time T1 for the solenoid 15 is filT when the solenoid energization signal a is sent from the control section.
Since it does not depend on a, conversely, when the solenoid energization signal a is sent from the 1111111 section, 1! There is no need to strictly set lTo as in the conventional devices shown in FIGS. 5 and 6. As a result, the pulse width 11J Ill of the solenoid energization signal a in the ill 6D section becomes easy.

Also, while the drawer 5 is open, due to some abnormality,
Even if the solenoid energization signal a is sent from the control section a, the Nandt gate 22 is not established, so the solenoid 15 is not actually energized.

[Effect of R Light J As explained above, according to the present invention, a detector is provided to detect when the drawer actually begins to open, and the energization of the solenoid is immediately cut off as soon as the drawer begins to open.

Therefore, the actual energization *m to the solenoid can be suppressed to the minimum necessary, and power consumption can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing a drawer opening circuit of a cash register according to an embodiment of the present invention, Fig. 2 is a cross-sectional schematic diagram showing a drawer opening/closing structure in the same embodiment, and Fig. 3 is a circuit diagram showing a drawer opening/closing structure in the same embodiment. A time chart showing the operation, Fig. 4 is an external view of a general cash register, Fig. 5 is a cross-sectional schematic diagram showing a conventional drawer opening mechanism, and Fig. 6 is a circuit diagram showing the conventional drawer opening circuit. It is. DESCRIPTION OF SYMBOLS 1... Housing, 2... Keyboard, 5... Drawer, 8... Total key, 9... Engagement plate, 11... Recessed part, 12... Claw part, 13... Coil spring, 14...
Lock arm, 15... Solenoid, 16... Engaging portion, 17... Spring, 18... Drive coil, 19...
・Transistor, 20...Micro switch, 22・
・・Nant gate, a・Solenoid energization signal, b・
... Detachment signal, d... Drive current. Applicant's agent Patent attorney Takehiko Suzue Figure 1 (a) (b) Figure 2: X Drop 1125 force - Figure 4 Figure 5

Claims (1)

[Claims] When the drawer is closed, the drawer is locked to the locking mechanism inside the housing, and the solenoid is driven by the solenoid energization signal to open the locking mechanism connected to the solenoid, and the elastic force of the spring is used to lock the drawer. In a cash register that opens a drawer, a detector is inserted between the drawer and the housing and detects when the drawer is released from the locking mechanism;
A drawer opening circuit for a cash register, comprising: a logic circuit that cuts off the solenoid energization signal in response to a withdrawal signal output from the detector.