JP4543002B2 - Conveyance speed switching device and paper sheet processing device - Google Patents

Description

  The present invention relates to a transport speed switching apparatus and a paper sheet processing apparatus that switch a transport speed during maintenance of a paper sheet processing apparatus that processes paper sheets such as securities.

  A paper sheet processing device for processing paper sheets such as securities takes out and transports the paper sheets that have been put in one by one and transports them, and the quality (shape, damage, etc.) of the paper sheets by the paper sheet inspection device. Inspected for faint printing and smudges, etc., and used as normal tickets (hereinafter referred to as regular paper), defective tickets (hereinafter referred to as waste paper), and rejected tickets such as abnormally transported tickets and two-sheet pickup tickets. It is a device for sorting processing. Regular paper is bundled with a paper band every 100 sheets to form a bundle, and if necessary, 10 bundles are stacked and further bundled with a paper band to form a bundle.

  In this type of large apparatus, an AC three-phase motor (hereinafter referred to as a three-phase motor) controlled by an inverter is used as the main power source for the apparatus for operation of the apparatus. When checking the operation of each unit, the low-speed operation was performed by changing the setting of the inverter of the three-phase motor. Specifically, at the time of maintenance or the like, the operator sets the operation of the apparatus to the maintenance mode (maintenance mode) from the operation panel and changes the setting of the inverter. In this state, the changeover switch arranged in each unit constituting the apparatus is turned on to switch to the maintenance mode, and the apparatus is operated at a low speed by pressing the operation button of the apparatus. Naturally, the low speed operation state is stopped by turning off the changeover switch in this state.

When the maintenance work in the maintenance mode is completed, the changeover switch is returned to the original state, and the inverter setting data is returned to the original state to return. A speed switching method using a clutch using one motor as described above is known (for example, see Patent Document 1).
JP-A-5-159130 (2nd page, FIG. 2)

  However, in the conventional paper sheet processing apparatus, when using the switch or the like in the maintenance mode, the setting of the inverter of the three-phase motor is changed. There was a safety issue of high-speed operation. In addition, when another operator turns on the switch without checking the surroundings, there is a safety problem that another operator who is working is caught in the apparatus.

  The present invention has been made to solve the above-described problems. In addition to a three-phase motor as a main power source of the apparatus, a drive source (AC motor) that operates at a low speed in the maintenance mode is separately provided. An object of the present invention is to provide a transport speed switching device and a paper sheet processing device that enable safe driving by switching and operating with a clutch when necessary.

  In order to achieve the above object, a transport speed switching device according to claim 1 of the present invention has a first drive means, a rotatable input bearing and an output bearing, and these input bearings and output bearings are connected or connected. A detachable switching means, a first shaft connected to an input bearing of the switching means, and a rotating shaft rotated by the first driving means are connected to transmit a driving force by the first driving means. A first transmission means, a bearing for connecting a rotatable third shaft, a second shaft connected to the output shaft of the switching means, and a third shaft connected to the bearing; A second transmission means for transmitting the driving force of the second shaft to the third shaft, a second driving means, a rotating shaft of the second driving means and the third shaft, and A third transmission means for transmitting the driving force of the rotary shaft of the second drive means to the third shaft, and at least The two driving means that can be turned on / off and the second driving means are stopped by a switch signal that is output when both of the two switching means are on, and the input shaft and the output shaft of the switching means. And a conveyance speed switching control means for connecting the two.

  According to a fourth aspect of the present invention, there is provided the sheet processing apparatus according to the fourth aspect of the present invention, a conveying unit that takes out and conveys one sheet at a time from a supply unit to which the sheets are collectively supplied, and the sheet conveyed by the conveying unit. A paper sheet processing apparatus comprising: a paper sheet inspection unit that inspects leaves; and a sorting unit that classifies the paper sheets based on an inspection result of the paper sheet inspection unit, wherein the transport unit The first drive means for operating at a first transport speed, the second drive means for operating the transport means at a second transport speed, a rotatable input bearing and an output bearing, and these input bearings And a switching means capable of connecting or disconnecting the output bearing, a first shaft connected to the input bearing of the switching means, and a rotating shaft rotated by the first driving means. A first transmission means for transmitting a driving force and a rotatable first means; A second shaft connected to the output shaft of the switching means, and a third shaft connected to the bearing, and the driving force of the second shaft is connected to the third shaft. A second transmission means for transmitting to the rotating shaft, a rotating shaft rotated by the second driving means, and a third shaft connected to the bearing, and the driving force by the second driving means is connected to the third driving means. A third transmission means for transmitting to the shaft, at least two switch means that can be turned on / off, and when the two switches are both on, the second drive means is stopped, and the switching means A conveyance speed switching control means for connecting the input shaft and the output shaft.

  According to the present invention, in addition to the three-phase motor as the main power source of the apparatus, a drive source (AC motor) that operates at a low speed in the maintenance mode is separately provided, and these are operated by switching with a clutch when low speed operation is required. Thus, it is possible to provide a conveyance speed switching device and a paper sheet processing device that enable safe operation.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a sheet processing apparatus 100 equipped with a transport speed switching device 9 according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating the transport speed switching device 9.

  First, the configuration of the sheet processing apparatus 100 will be described with reference to FIG. The paper sheet processing apparatus 100 includes a take-out device 1 that takes out the paper sheets P one by one from the supply unit 1a to which the paper sheets P are collectively supplied. A transport path (transport means) 3 for transporting the taken paper sheet P, a paper sheet inspection device (paper sheet inspection means) 4 for inspecting the printing state of the paper sheet P transported by the transport path 3, An accumulating device for accumulating the paper sheets P as a sorting means for classifying the paper sheets P based on the inspection result by the paper sheet inspecting device 4 and binding the paper sheets P accumulated by the accumulating device with a paper band. A stacking / binding device 5 including a binding device and an exclusion ticket stacking device 6 for stacking a rejection ticket are provided. Further, the transport path 3 is provided with a second drive means that operates at a high speed (second transport speed) and a first drive means that operates at a low speed (first transport speed). Is provided with a transfer speed switching device 9 for switching between the two.

  The take-out device 1 is provided with a supply unit 1a that collectively feeds, for example, 1000 sheets of paper P that are one input unit, and a take-out unit 1b that takes out the supplied paper sheets P one by one at regular intervals. It has been.

  The conveyance path (conveyance means) 3 includes a conveyance roller disposed along the conveyance surface, a conveyance belt hung on the conveyance roller, and a driving unit that drives the conveyance roller. In this embodiment, since the paper sheet P to be transported is transported in the longitudinal direction, two transport belts having a width of about 10 mm are arranged in a direction perpendicular to the transport direction. Optimum values are set for the width and number of the conveyor belts depending on the shape of the paper sheet P to be conveyed and the conveyance mode such as longitudinal conveyance or short conveyance. In addition, when processing a new ticket (new paper sheet immediately after issuance), the transported paper sheet may be soiled by the transport belt, so that belt cleaning devices 20a to 20f are provided at the folded portion of the transport belt. Is placed.

  The paper sheet inspection apparatus (paper sheet inspection means) 4 is an apparatus that inspects the printing state of the paper sheet P being conveyed. As a result of the inspection by the inspection device 4, the paper sheet P having a normal printing state is determined to be a normal sheet, and a ticket having an abnormality in the printing state as a result of the inspection is determined to be a waste paper. A ticket that cannot be inspected is identified as an excluded ticket. The rejected ticket is branched to the right side by the branch gate G1, and is collected in the rejected ticket stacking device 6 by the transport path 3a.

  When the paper sheet processing apparatus 100 processes a new ticket as in the present embodiment, the serial number (issue number) of the paper sheet P is occupied by serial sheets that are serial numbers. The bundling device 5 is composed of the correct paper stacking devices 51 and 52 and is not provided with the waste paper stacking device. However, a part of the stacking / bundling device 5 is used as a waste paper stacking device and is transported. Of course, it is possible to set so that inexact tickets such as abnormal tickets and two-sheet tickets can be stacked in the reject ticket stacking device 6.

  FIG. 2 is an example of the transport speed switching device 9. The transport speed switching device 9 includes a first driving means 91 that rotates at a low speed that is a first speed during maintenance, a first transmission means 92 that transmits the driving force of the first driving means 91, Electromagnetic clutch 93a as switching means for controlling on / off of the driving force transmitted by one transmission means 92, and second transmission means for transmitting the driving force of first driving means 91 output from this electromagnetic clutch 93a 96, a bearing portion 97 that rotates by the driving force transmitted by the second transmission means, a second driving means 94 that rotates at a second speed at a high speed during normal operation, and a driving force of the second driving means 94 The third transmission means 95 and the conveyance speed switching control unit 99 are provided.

  The first drive means 91 has an AC motor 91a, and the rotational speed of the AC motor 91a is converted so as to rotate at a low speed by a first transmission means 92 described later.

  The first transmission means 92 is wound around a pulley 91c disposed on the rotation shaft 91b of the AC motor 91a, a pulley 93c disposed on the input shaft 93b of the electromagnetic clutch (switching means) 93a, the pulley 91c and the pulley 93c. And the connecting belt 92a. In such a configuration, the diameter of the pulley 93c is set larger than the diameter of the pulley 91c, and the rotation speed of the pulley 93c is lower than the rotation speed of the pulley 91c due to the ratio of the diameters.

  The transport speed switching device 9 includes an electromagnetic clutch 93a as switching means, an input shaft 93b coupled to the input shaft holding portion 93a1 of the electromagnetic clutch 93a, and an output coupled to the output shaft holding portion 93a2 of the electromagnetic clutch 93a. A shaft 93d is provided.

  A pulley 93c is disposed on the input shaft 93b, and the driving force of the AC motor 91a is transmitted to the input shaft 93b by the first transmission means 92.

  A pulley 93e or 93f is disposed on the output shaft 93d. In the embodiment, the driving force transmitted to the input shaft 93b is transmitted to the outside by the second transmission means 96 connected to the pulley 93f.

  That is, by turning on the electromagnetic clutch 93a, the input shaft holding portion 93a1 and the output shaft holding portion 93a2 are connected, and the driving force of the input shaft 93b is transmitted to the output shaft 93d. As a result, the rotation shaft of the output shaft 93d rotates at the rotation speed of the input shaft 93b.

  The second transmission means 96 includes a pulley 93f disposed on the output shaft 93d and a shaft 97b rotatably held on the bearing 97 of the bearing portion 97, and a connecting belt 96a wound around the pulley 93f and the pulley 97d. It consists of. As a result, when the electromagnetic clutch 93a is turned on, the electromagnetic clutch 93a rotates at a low speed in the direction indicated by the arrow A1.

  Since the second driving means 94 is a main motor that drives the paper sheet processing apparatus 100, a three-phase motor 94a having a large output is used. A pulley 94c is incorporated in the rotating shaft 94b of the three-phase motor 94a, and the driving force is transmitted to a bearing 97 described later.

  The bearing portion 97 is provided with a rotating shaft 97b, and a pulley 97c and a pulley 97d are incorporated in the rotating shaft 97b. The pulley 97c is connected to a pulley 93f incorporated in the rotating shaft 93g of the transport speed switching device 9 via a drive belt 96, and the driving force of the rotating shaft 93g of the transport speed switching device 9 is transmitted to the pulley 97c. The pulley 97d is connected to a pulley 94c incorporated in the rotation shaft 94c of the three-phase motor 94a via a drive belt 95, and the driving force of the rotation shaft 94c of the a94 is transmitted. As a result, when the electromagnetic clutch 93a is off, normal high-speed rotation is performed in the direction of the arrow A1 shown in the figure.

  The shaft 97b of the bearing 97 receives the driving force from two places as described above. However, the driving force from the three-phase motor 94a side is not normally received from the two places. Rotate by. On the other hand, when the low-speed operation is performed in the maintenance mode, the rotation of 94a is stopped, and the driving force on the AC motor 91a side is connected by the electromagnetic clutch 93a to rotate at a low speed.

  When the processing in the maintenance mode is finished and the normal operation is started, the driving force on the AC motor 91a side is disconnected by the electromagnetic clutch 93a and the driving force is not transmitted to the output shaft 93d. As a result, the shaft 97b of the bearing 97 is rotated by the driving force on the 94a side. The electromagnetic clutch on / off control method will be described later.

  The transfer speed switching control unit 99 receives switch signals and inverter signals from the key switches SW11 to SWn2 as switch means arranged on each device side so that the operator can set the maintenance mode and transfer at low speed. The input control unit 99a is provided with a switching control unit 99c that beats the buzzer 99b based on the input signal and generates an electromagnetic clutch signal 99f for driving the electromagnetic clutch 93a on or off.

  For example, a plurality of the switch means are arranged to operate the paper sheet processing apparatus 100 as a pair of serially connected key switches SW11 as the first switches and key switches SW12 as the second switches. Is done. FIG. 2 shows a state in which a plurality of pairs of key switches are arranged in the main apparatuses 1 to n constituting the paper sheet processing apparatus 100.

  FIG. 3 is a diagram for explaining an electromagnetic clutch on / off signal 99f output from the transport speed switching control unit 99 shown in FIG. FIG. 4 is a timing chart for explaining the operation of the transport speed switching device 9. The operation of the transport speed switching device 9 will be described with reference to FIGS.

  One set (two) of key switches for switching to the maintenance mode is arranged for each device, or one set for each of a plurality of devices. This arrangement position is set based on the size of the apparatus or the ease of maintenance operation. Here, in order to simplify the description, it is assumed that a pair of key switches SW11 and SW12 are arranged in the vicinity of the device 1, and the description will be made according to the timing chart of FIG.

  First, an operation start button arranged on an operation unit (not shown) is pressed. The timing is assumed to be t0. (FIG. 4 (1), t0).

  The main control unit detects the pressing of the operation start button, confirms the initial state such as the detection of the remaining paper sheets in the apparatus and the opening / closing of the door of the paper sheet processing apparatus, and starts the operation of the apparatus without any problem. In this case, the inverter of the three-phase motor 94a is set (FIG. 4 (2), t1). The operation of the apparatus is started by setting the inverter (FIG. 4 (3), t1). Normally, in this state, the above-described paper sheets are taken out and conveyed, and are subjected to sorting processing based on the detection result of the paper sheet inspection apparatus 4. In this case, the conveyance speed is high-speed conveyance (FIG. 4 (8), t1).

  Even if the key switch SW11 is turned on during the operation from the timing t2 to t4 and the key switch SW12 is subsequently turned on from the timing t3 to t5, the conveyance speed does not change.

  Next, when the processing of the paper sheets is completed and the operation start button is turned off, the inverter setting is canceled and the operation of the apparatus is stopped (t6, stopped).

  In this state, when the maintenance unit is set to the maintenance mode in this state, the apparatus enters the maintenance mode (t7) and waits for reception of the key switch SW11 or the key switch SW12.

  Next, during this maintenance mode, when the key switch SW11 is turned on (t8) and then the key switch SW12 is turned on (t9), the electromagnetic clutch and the buzzer are turned on. The buzzer beats for a set time, alerts the surroundings, and then stops. While both the key switch SW11 and the key switch SW12 are in the on state (between t9 and t10), the conveyance speed rotates at a low speed. During the low-speed rotation, the predetermined maintenance work is completed (t12), and when the operation mode is exited from the maintenance mode and the normal mode is resumed, the next operation start button is awaited.

  In this state, when the operation start button is pressed (t13), the processing as described above is performed and high-speed conveyance is performed.

  The above key switch operations are the same when operated from other key switches. At this time, at least two key switches must be operated in pairs. When arranging these two keys in pairs at a plurality of locations, for example, as shown in FIG. 2, the key switches SW11, SW21,... SWn1 use a common key, and the key switches SW12, SW22,. .. SWn2 uses a common key. In this way, by preparing two different key switches, key operations can be performed from any location.

  Further, as is apparent from FIG. 2, for example, the key switch SW11 of the device 1 is turned on. For example, even if the key switch SW21 or SW22 of the device 2 is erroneously turned on, the electromagnetic clutch cannot be turned on. Therefore, safety during operation of the apparatus in the maintenance mode is ensured.

  The key switch can be used, for example, when one of a pair of key operations is held by an operator and the other is held by an administrator, and maintenance work is performed in the maintenance mode only when both key switches are turned on. There is also a way to do so. According to such a method, in the case of a relatively large apparatus such as this apparatus, in a mode in which the apparatus can operate with the cover of the apparatus opened, such as a maintenance mode, another operator mistakenly installs the apparatus. The danger of driving can be prevented.

  FIG. 5 shows a configuration of a key switch portion according to the second embodiment of the present invention. Since portions other than the key switch portion shown in the second embodiment are the same as those in the first embodiment, the description thereof will be omitted, and the changed portions will be described.

  In the key switch portion of this embodiment, the key switches SW11 and SW12 are connected in series, one end thereof is connected to the power supply + Vcc, and the other end is connected to the power supply terminal b of the relay 110. Terminal a of relay 110 is connected to a reference potential (0 V). The contact terminal d of the relay 110 is input to the input terminal of the inverting element 110b, and the output signal SW1 of the output terminal is connected to the input unit of the transport speed switching control unit via the connection line 99d1.

  The contact terminal f of the relay 110 is connected to one end of the display 110a, and the other end of the display 11a is connected to the power source + Vcc. Note that the contact terminals c and e of the relay 110 are connected to a reference potential. With the above configuration, when the key switches SW11 and SW12 are turned on, the relay 110 is energized and the contact terminals d and f become the reference potential. As a result, the indicator 110a is turned on. Further, the output terminal of the inverting element 110b becomes a high level, and notifies the conveyance speed switching control unit that both the key switches SW11 and SW12 are turned on. The subsequent operation is as described above.

  Naturally, when either one of the key switches SW11 or SW12 is turned off, the relay 110 is not energized, the display 110a is turned off, and the output terminal of the inverting element 110b becomes low level.

  As described above, in the embodiment of the present invention, when a plurality of key switches that are used as a large pair of devices are used, the pressed switch is lit, so that the lit switch can be visually confirmed. Since it is lit when the key switch is returned, there is an effect that it is easy to understand, and it prevents the operator from making an erroneous operation.

  FIG. 6 shows a configuration of a key switch portion according to the third embodiment of the present invention. In the third embodiment, a corresponding relay is provided for each key switch. Since the parts other than the key switch part are the same as those in the first embodiment, the description thereof will be omitted, and the changed part will be described.

  The key switch portion of this embodiment includes a relay 111 corresponding to the key switch SW11 and a relay 112 corresponding to the key switch 12.

  One terminal of the key switch SW11 is connected to the power supply + Vcc, and the other end is connected to the power supply terminal b of the relay 111. The contact terminal f of the relay 111 is connected to one terminal of the display 111a, and the other end of the display 112a is connected to the power source + Vcc. Further, the contact terminals a, c, e of the relay 111 are connected to the reference potential.

  One terminal of the key switch SW12 is connected to the power supply + Vcc, and the other end is connected to the power supply terminal b of the relay 112. The contact terminal f of the relay 112 is connected to one terminal of the display 112a, and the other end of the display 112a is connected to the power source + Vcc. The contact terminals a and e of the relay 112 are connected to a reference potential.

  Further, in order to connect one contact point of each of the relay 111 and the relay 112 in series, the contact terminal d of the relay 111 is connected to the contact terminal c of the relay 112, and the contact terminal d of the relay 112 is input to the inverting element 112b. . The output signal SW1 of the inverting element 112b is connected to the input unit of the transport speed switching control unit 99 via the connection line 99d1.

  In the above configuration, when the key switch SW11 is turned on, the display device 111a is turned on, and when the key switch SW12 is turned on, the display device 112a is turned on. Further, when both the key switch SW11 and the key switch SW12 are turned on, the output signal SW1 of the inverting element 112b becomes high level (active), and notifies the transport speed switching control unit that both the key switches SW11 and SW12 are turned on. . The subsequent operation is the same as in the first or second embodiment. Of course, when either one of the key switches SW11 and SW12 is turned off, the relay to which the turned off key switch is connected is not energized, and the display connected to the relay is turned off.

  As described above, in the embodiment of the present invention, in addition to the same effects as those of the embodiment 2, it is possible to individually monitor the state in which the key switch SW1 or the key switch SW2 is turned on or off. , Safety is improved. In this embodiment, the logic circuit that becomes active when the output of the inverting element is at the high level is formed, but it goes without saying that the logic circuit that becomes active when the output of the inverting element is at the low level is formed.

1 is a schematic configuration diagram of a paper sheet processing apparatus equipped with a conveyance speed switching device according to an embodiment of the present invention. The figure explaining the conveyance speed switching part using a conveyance speed switching apparatus. The figure explaining the electromagnetic clutch on / off signal output from the conveyance speed switching control part shown in FIG. The timing chart explaining operation | movement of a conveyance speed switching part. The structure of the key switch part by Example 2 of this invention. The structure of the key switch part by Example 3 of this invention.

Explanation of symbols

P Paper sheet G1 Branch gate 1 Take-out device 3 Transport path (transport means)
4 Paper sheet inspection device (paper sheet inspection means)
5 Accumulation / Bundling device (sorting means)
6 rejected ticket accumulating device 9 transport speed switching device 91 first drive means 91a AC motor 92 first transmission means 92a connecting belt 93 transport speed switching device 93a electromagnetic clutch (switching means)
93a1 Input shaft holding portion 93a2 Output shaft holding portion 93b Input shaft 93c Pulley 93d Output shaft 93e, 93f Pulley 94 Second drive means 94a Three-phase motor 95 Third transmission means 95a Connection belt 96 Second transmission means 96a Connection belt 97 Bearing part 99 Conveyance speed switching control part 99a Input part 99b Buzzer 99c Switching control part

Claims (5)

First driving means;
A switching means having a rotatable input bearing and an output bearing, and capable of connecting or disconnecting the input bearing and the output bearing;
A first transmission means for connecting a first shaft connected to an input bearing of the switching means and a rotary shaft rotated by the first driving means, and for transmitting a driving force by the first driving means;
A bearing connecting a rotatable third shaft;
Second transmission means for connecting the second shaft connected to the output shaft of the switching means and the third shaft connected to the bearing, and transmitting the driving force of the second shaft to the third shaft. When,
A second driving means;
A third transmission means for connecting the rotary shaft of the second drive means and the third shaft, and transmitting the driving force of the rotary shaft of the second drive means to the third shaft;
At least two on / off switch means;
A transfer speed switching control means for stopping the second drive means by a switch signal output when both of the two switch means are on, and connecting the input shaft and the output shaft of the switching means;
A transfer speed switching device comprising: The transport speed switching control means is
When the switch means is arranged in plural as a pair of first switches and second switches connected in series, the first switch and the second switch constituting an arbitrary pair of the switches 2. The transport speed switching device according to claim 1, wherein the second driving unit is stopped by a switch signal output when both are on, and the input shaft and the output shaft of the switching unit are connected. The switch means includes
A pair of the first switch and the second switch;
A first relay supplied with power to energize the relay when the first switch is on;
A second relay supplied with power to energize the relay when the second switch is on in the previous period;
One of the contact terminals of the first relay is used as a reference potential, and a signal obtained by connecting the other contact terminal of the first relay and the contact terminal of the second relay in series is used as the switch signal. The conveyance speed switching device according to claim 1. Conveying means for taking out and conveying one sheet at a time from the supply unit to which the paper sheets are collectively supplied, a paper sheet inspecting means for inspecting the paper sheet conveyed by the conveying means, and this paper sheet inspection A paper sheet processing apparatus comprising: sorting means for sorting the paper sheets based on a test result by the means;
First driving means for operating the conveying means at a first conveying speed;
Second driving means for operating the conveying means at a second conveying speed;
A switching means having a rotatable input bearing and an output bearing, and capable of connecting or disconnecting the input bearing and the output bearing;
A first transmission means for connecting a first shaft connected to an input bearing of the switching means and a rotary shaft rotated by the first driving means, and for transmitting a driving force by the first driving means;
A bearing connecting a rotatable third shaft;
Second transmission means for connecting the second shaft connected to the output shaft of the switching means and the third shaft connected to the bearing, and transmitting the driving force of the second shaft to the third shaft. When,
A third transmission means for connecting a rotating shaft rotated by the second driving means and a third shaft connected to the bearing, and transmitting a driving force by the second driving means to the third shaft. When,
At least two on / off switch means;
A conveyance speed switching control means for stopping the second driving means when both the two switches are on and connecting the input shaft and the output shaft of the switching means;
A paper sheet processing apparatus comprising: The transport speed switching control means is
An inverter setting signal output when the second driving means is in operation;
A signal obtained by connecting the two switch signals in series;
When the inverter setting signal is active, the switching means is not connected regardless of the two switch signals, and when the inverter setting signal is not active and the two switch signals are both on, the switching means 5. The paper sheet processing apparatus according to claim 4, wherein a signal for connecting the two is output and the alarm buzzer is beaten for a predetermined time.

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