JP6365022B2 - Telephone along the line - Google Patents

Description

  The present invention relates to a telephone line for communication installed at a predetermined interval along a railway line, a road line, and the like, and more particularly to a line telephone having an automatic door closing function of an opening / closing door.

  A telephone line for communication is installed along the railway along a predetermined interval (for example, 500 m), and maintenance and inspection are regularly performed. Some conventional telephones have a structure in which the door is urged by a spring in the direction of closing the door, but such a telephone is opened by opening and closing the door during maintenance. It is inconvenient that the door must be held down by hand so that it does not close during operation. For this reason, an invention (for example, Patent Document 1) of a railroad telephone provided with a stopper for maintaining an open state has been proposed and put into practical use.

JP 2002-271467 A

  However, in the railway line telephone provided with the stopper that maintains the open state as in Patent Document 1, it is not necessary to suppress the door from closing during the operation, and thus there is an advantage that the operation is easy. Forgetting to close the door after the work is finished. However, if the door is left open, it may cause troubles due to wind and rain or snowfall, and the equipment may deteriorate. Therefore, if it is discovered that the door is forgotten to close, it must be closed. However, telephones along railway lines are often installed at locations away from the station building, etc., and it is necessary to monitor whether the train is approaching during work, so it is only necessary to close the forgotten door. Two people were required, and it took a lot of time and effort.

The present invention has been made paying attention to the problems as described above, and it is not necessary to dispatch workers by automatically closing the door after a predetermined time even if the door is forgotten to be closed. The purpose is to provide a telephone.
Another object of the present invention is to provide a railway phone that can operate a stopper unlocking mechanism while guaranteeing power supply to the telephone without replacing a power supply device of the existing railway telephone.
Still another object of the present invention is to provide a small stopper lock releasing mechanism that can be operated with extremely low power consumption and can be easily added to an existing line telephone.

In order to achieve the above object, the present invention provides a housing that houses a telephone body, a door provided on an opening surface of the housing, and supports the door so that the door can be opened and closed. And a telephone along the line with an automatic closing hinge that urges the door in the closing direction,
A stopper capable of maintaining the door open against the force of the automatic closing hinge;
Release means comprising a drive source and capable of releasing the open maintenance state of the stopper;
Control means for operating the drive source,
The control means includes a timer, and starts counting the timer when the door is released, and operates the driving source of the release means when the timer determines that a predetermined time has elapsed, It was configured to release the open maintenance state.
According to the above configuration, when a predetermined time elapses after the door is released, the control means operates the drive source of the release means to release the stopper open maintenance state, and thus the door is closed by the force of the automatic closing hinge. Therefore, it is possible to prevent the telephone door from being left open for a long time due to forgetting to close the door.

Here, preferably, comprising a notification means capable of generating a voice or a warning, and an operation means for resetting the timer,
The control means causes the notification means to notify that the release means operates before the timer measures a predetermined time.
According to such a configuration, it is informed that the stopper releasing means operates before the timer measures the predetermined time, so that the work time becomes long and the door is likely to be automatically closed after the predetermined time elapses during the work. Even if it happens, it is possible to avoid the automatic closing of the door by operating the operation means and resetting the timer, and it is possible to improve work efficiency without being forced to interrupt the work suddenly. it can.

Preferably, the power supply device for supplying power to the telephone body and detection means capable of detecting the open / closed state of the door are provided, and power is supplied to the telephone body from the power supply device while the door is open. Configured to
The control means includes a charge storage means and a charging means capable of charging the charge storage means with a constant current, and the telephone main body during operation of the telephone main body from the maximum current that can be supplied by the power supply device while the door is opened. When the charge storage means is charged with the remaining current or a part of the current subtracted from the current, and when the timer determines that a predetermined time has elapsed, the drive source of the release means is charged with the charge charge of the charge storage means It is configured to be operated with.

  According to the above configuration, the charge storage means is charged with a minute current while the door is opened, and the lock release mechanism is operated with the charge charge when the predetermined time has elapsed. Without replacing the device with a power supply device having a large current supply capability, it is possible to operate a lock release mechanism that releases the stopper open maintenance state while guaranteeing power supply to the telephone.

Further preferably, the stopper is substantially linear, has an engaging portion engageable with a locking means provided on the housing side on the distal end side, and the base end portion rotates around the inner surface of the door. It is attached movably and is urged to rotate by a spring in a direction in which the locking means engages the engagement portion,
The drive source is composed of a solenoid, and the solenoid is arranged so that the plunger can move in a direction substantially parallel to the movement direction of the stopper.
The releasing means includes an operating lever that is brought into contact with the tip of the stopper and is rotated by the solenoid, and when the operating lever is rotated, the engagement between the locking means and the engaging portion is released. Configure as follows.

  According to the above configuration, the solenoid is arranged so that the plunger can move in a direction substantially parallel to the moving direction of the stopper, and the operating lever rotated by the solenoid is brought into contact with the tip of the stopper. Therefore, the operating lever can be rotated with a relatively small solenoid to disengage the locking means from the engaging portion, and the drive source can be downsized. By adding an unlocking mechanism for the stopper to the telephone along the line, the door can be automatically closed after a predetermined time even if the door is forgotten to be closed.

  Desirably, the locking means is a roller pin having a bearing, and the engaging portion is a notch formed in the stopper, and the notch has a first surface and a second surface that form substantially 90 degrees with each other. And the first surface is in contact with the roller pin to prevent the automatic closing hinge from closing the door, and the second surface is in contact with the outer peripheral surface of the roller pin. The door is kept open, and a sliding portion having an arcuate outer surface is formed from the first surface of the notch to the side surface of the stopper.

  According to such a configuration, in a state where the roller is engaged with the notch of the stopper, the reaction force from the roller acts in the longitudinal direction of the stopper, so that the stopper tip is separated from the roller while preventing the stopper from coming off. The stopper is unlocked with a slight movement of the stopper and the stopper is released from the locked state. Therefore, it is possible to release the stopper maintaining state with very little power, and the lock releasing mechanism can be downsized. Therefore, it can be easily added to an existing telephone line.

  According to the present invention, it is possible to realize a telephone along the line that does not require dispatch of a worker by automatically closing the door when a predetermined time elapses even if forgetting to close the door. Further, the stopper unlocking mechanism can be operated while guaranteeing the power supply to the telephone body without replacing the power supply device of the existing railway telephone. Further, since the stopper unlocking mechanism can be operated with very little power consumption, an effect of being easily added to the existing line telephone can be obtained.

It is a perspective view which shows a mode that the state which opened the door of one Example of the along-line telephone of this invention was seen from the front. It is a perspective view which shows the structure (lock release mechanism abbreviate | omitted) of the stopper which maintains the door of the along-line telephone of FIG. 1 in the open state. It is a perspective view which shows the relationship between the stopper of FIG. 2, and the roller pin which latches this. It is a circuit block diagram which shows the specific example of the control circuit which controls the electric system inside a along-line telephone including a lock release mechanism. It is a perspective view which shows the detail of the specific example of the lock release mechanism for removing the stopper of FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a line telephone according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, a railway phone 10 according to the present embodiment includes a box-shaped housing 11 whose front surface can be released, a telephone body 12 housed in the housing 11, and a front surface of the housing 11. It comprises a door 13 for opening and closing the opening, a control box 14 for controlling the internal electrical system, and the like.
The telephone body 12 includes a telephone circuit board for voice transmission / reception, a dial push button group 15 on the front surface, and a hook 17 for hooking the handset 16 on the side. Is provided.

  The door 13 is rotatably attached to the front surface of the housing 11 by automatic closing hinges 18a and 18b incorporating a torsion spring, and is biased in the closing direction by the torsion spring. A door handle 13A is fixed to the edge of the door 13 opposite to the hinges 18a and 18b, and a strip-shaped stopper 21 and its unlocking are provided between the upper surface of the telephone body 12 and the door 13. A mechanism (solenoid 29 or the like) is provided. Although not shown in the drawing, a train approach warning device (TC line guard) that informs the approach of a train in a space that is on the side of the telephone body 12 (on the left side in the figure) and is covered with a panel behind the handset 16 Attached function devices such as are provided.

The rail phone 10 according to the present embodiment includes a locking mechanism that locks the door 13 so that the door 13 is not opened when the door 13 is closed. The description is omitted.
As shown in FIG. 2, one end (right end in the figure) of the stopper 21 at the top of the telephone body 12 is pivotally supported by a pin 23 supported by a bracket 22 on the inner surface of the door 13. In FIG. 2, if the structure is represented as it is, the shape of the distal end portion of the stopper 21 becomes difficult to understand, so the illustration of the lock release mechanism is omitted.

The other end (the left end in the figure) of the stopper 21 is slidably engaged with a locking bracket 24 attached to the upper surface of the telephone body 12, and a notch 21a forming approximately 90 degrees is formed at the tip. Yes. The locking bracket 24 is formed by bending a belt-like plate material into a U shape, and both ends are fixed to the upper surface of the telephone body 12.
As a result, a rectangular hole is formed by the locking bracket 24 and the upper surface of the telephone body 12, and the stopper 21 is slidably inserted into the hole.

  A pair of roller pins 25a and 25b are provided on the lower surface of the locking bracket 24 at a distance slightly larger than the width of the stopper 21, as shown in FIG. 3 when the locking bracket 24 is viewed from below. . Among these, the roller pin 25a is a guide & locking roller pin, and is locked when the roller pin 25a enters the notch 21a at the tip of the stopper 21. The other roller pin 25b is a guide roller pin. In order to reduce frictional resistance, that is, the roller pin 25a can be unlocked with a small force, the roller pin 25a may be constituted by a bearing built-in.

Although not shown, a torsion spring is interposed in the stopper support pin 23 to urge the stopper 21 in a direction in which the notch 21a engages with the roller pin 25a. Thus, when the door 13 is opened, the back surface of the stopper 21 moves obliquely forward while slidingly contacting the roller pin 25a. When the notch 21a reaches the position of the pin 25a, the stopper 21 rotates and the notch 21a becomes the roller. It is engaged with the pin 25a, and a release maintaining state (locked state) in which the movement of the stopper 21 in the reverse direction, that is, the door closing direction is prevented.
In normal work, when the operator pushes the middle of the stopper 21 backward after the work is finished, the notch 21a of the stopper 21 and the roller pin 25a are disengaged and are built in the automatic closing hinges 18a and 18b. The door 13 is configured to automatically close by the restoring force of the spring.

  A door switch 31 (see FIG. 2) for detecting whether or not the door 13 is closed is provided on the upper surface of the telephone body 12. The door switch 31 is configured to detect the open / closed state of the door when the door 13 is closed, for example, by being disposed at a position where the actuator is pressed by the lower surface of the bracket 22 to be turned on. can do. Further, in this embodiment, an unlocking pin 26 (see FIG. 5) is provided on the upper surface (back surface side in FIG. 3) of the tip of the stopper 21, and when the door is kept open for a predetermined time or longer, The lock release mechanism is activated and the pin 26 is pushed by the force of the solenoid so that the notch 21a of the stopper 21 and the roller pin 25a can be disengaged.

Next, the configuration and function of the solenoid 29 (see FIG. 5) of the unlocking mechanism and the control box (control device) 14 for controlling the operation of electrical components such as a warning buzzer, LED, and speaker will be described.
As described above, the telephone along the line of this embodiment supplies power to the telephone main body 12 when the door switch 31 is on (the door is closed), and when the door switch 31 is on (the door is closed). The power to the telephone body 12 is configured to be cut off. This is because the telephone call is performed with the door open. On the other hand, the control device cannot know whether the door is open because the door is open or forgotten to close. Therefore, in this embodiment, when the door is kept open for a predetermined time (for example, 1 hour), it is determined that the door is forgotten to be closed, and the lock release mechanism is operated to close the door.

  However, even when the door 13 is open for a predetermined time or more, it is necessary to guarantee the supply of power to the telephone body 12 until the lock release mechanism is operated to close and close the door. However, the existing power supply device for the telephone along the line has only a current supply capability that gives a slight margin to the operating current of the telephone body 12 with the largest power consumption. As a result, if an unlocking mechanism is provided and an alarm sound or sound is generated immediately before the unlocking mechanism is operated, the power supply is insufficient and the power supply to the telephone body 12 cannot be guaranteed.

Therefore, in the control box (control device) 14 of this embodiment, a large-capacity capacitor is mounted, and the capacitor is charged with a surplus current (several tens of mA) while the door is open, and the lock release mechanism is activated. It was configured to make up for the power shortage.
Also, even if the operation time becomes longer and the automatic unlocking mechanism is activated during the operation, the operation is notified in advance and the unlock mechanism is not activated when the operator presses the reset button. It was decided to have a function.
Note that the supply / cutoff of power to the telephone body 12 according to the open / closed state of the door 13 can be performed based on a signal from the door switch 31.

FIG. 4 shows a specific circuit configuration example of the control box 14 having the above functions.
In FIG. 4, reference numeral 41 denotes a control unit such as a microprocessor that plays a leading role in the control apparatus, and reference numeral 42 denotes a power supply apparatus. A signal from a reset button 43 provided on the surface of the casing of the control box 14 and a signal from setting devices 44A and 44B such as rotary switches mounted on a substrate inside the casing are input to the control unit 41. Has been made possible.

The control unit 41 includes a driver 46A such as an inverter that drives an electronic buzzer 45 that emits a warning sound based on a signal output from the control unit 41, a driver 46B that drives an LED 47 for light emission display, and a speaker 48. A driver 46C for outputting a reproduction start signal is connected.
The power supply device 42 includes a DC-DC converter or a switching regulator that generates an internal power supply voltage such as +12 V based on a power supply voltage such as +48 V from the outside. The power supply device 42 includes a control unit (CPU) 41. Further, a constant voltage circuit 49A for generating an operating voltage (+5 V) and a constant current charging circuit 50A for the electronic buzzer 45, the LED 47, and the like are connected. The power supply device 42 is connected to a constant voltage circuit 49B that generates an operating voltage (+5.6 V) of the constant current charging circuit 50B. Among them, the constant current charging circuit 50A charges a large capacity capacitor (capacitor) 51A such as an electric double layer capacitor with a weak constant current, and the constant current charging circuit 50B similarly charges a large capacity capacitor 51B. It is provided for charging with a constant current.

  An electronic switch 52A for on / off control, such as a photocoupler, is provided between the capacitor 51A and the solenoid 29 of the lock release mechanism, and the solenoid 29 is driven by the charge of the capacitor 51A. It is configured. An electronic switch 52B for on / off control is provided between the driver 46C and the sound reproduction board 53 that drives the speaker 48B, and a power supply terminal of the sound reproduction board 53 is connected to the capacitor 51B. The speaker 48 is configured to be driven by the charge of the capacitor 51B.

The electronic switch 52A is on / off controlled by a driver 46D that receives a signal output from the control unit 41, and the electronic switch 52B is on / off controlled by a driver 46C.
As described above, the control box (control device) of the present embodiment is configured to drive the solenoid 29 and the speaker 48 of the unlocking mechanism with the charge of the capacitor, so that the existing power supply device has a current supply capability. The newly provided unlocking mechanism can be operated without replacing it with a higher one.

Furthermore, in the control box (control device) of the present embodiment, the time from when the door is released until the automatic unlocking mechanism is activated by operating the setting device (rotary switch) 44A connected to the control unit 41. Can be set every hour within the range of 0 to 15 hours, and by operating the setting device 44B, the alarm sending time immediately before the operation of the automatic unlocking mechanism can be set to 0 to 300 seconds. In this range, it can be set every 20 seconds.
Further, for example, when the reset button 43 is pressed during alarm transmission, the timer for measuring the time until the automatic unlocking mechanism is activated is reset, and the operation of the automatic unlocking mechanism is stopped. Furthermore, if the door switch 31 does not turn on after a while after the set time by the setting device 44A has passed, the control unit 41 outputs the drive control signal for the solenoid 29, an automatic unlocking mechanism (solenoid 29) after one hour. Is configured to perform a retry of the operation.

  FIG. 5 shows details of the unlocking mechanism of the stopper 21 provided at the upper part of the telephone body 12. This unlocking mechanism is devised so that it can be added later to existing telephones along the line. Specifically, the stopper mechanism of the existing telephone along the line is configured as shown by a solid line in FIG. 2, and a lock release mechanism using a solenoid as a drive source as shown in FIG. It can be added to a relatively narrow space above.

As shown in FIG. 5, an L-shaped lever 28 is pivotally supported by a support shaft 27 on the upper surface of a U-shaped locking bracket 24 into which the distal end side of the stopper 21 is inserted. At the same time, a solenoid 29 is fixed on the upper surface of the telephone body 12 along substantially the same direction as the stopper 21. An operating plate 32 is fixed to the tip of the plunger 29a of the solenoid 29, and the other end of the operating plate 32 is connected to one end of the lever 28 by a pin 33 so as to be rotatable.
Further, the side surface of the other end portion of the lever 28 is in the released and maintained state in which the notch 21a (see FIG. 3) at the tip of the stopper 21 is engaged with the roller pin 25a, and the unlocking pin at the tip of the stopper 21. It is comprised so that it may contact | abut to the surrounding surface of 26.

Further, as shown in FIG. 3, an arc-shaped slide is provided at a portion of the notch 21a at the tip of the stopper 21 that is continuous with the side surface of the stopper 21 so that the roller pin 25a can be easily removed from the notch 21a. A moving part 21b is formed. The length L1 from the innermost part of the notch 21a to the starting point of the arcuate sliding part 21b is set to a value slightly larger than the radius of the roller pin 25a.
Thus, in a state where the roller pin 25a is engaged with the notch 21a, the reaction force from the roller pin 25a acts in the longitudinal direction of the stopper 21, thereby preventing the stopper 21 from coming off and the tip of the stopper 21 from The engagement is released and the lock is released only by moving a little in the direction away from the roller pin 25a. That is, by simply pressing the lock release pin 26 at the tip of the stopper 21, the engagement is released and the lock is released.

  In the lock release mechanism of FIG. 5, when the solenoid 29 is excited, the plunger 29a contracts and pulls the operating plate 32 fixed to the tip. Then, since the operating plate 32 rotates the lever 28 in the counterclockwise direction, the side surface of the other end of the lever 28 presses the lock release pin 26 at the tip of the stopper 21, and the stopper 21 is rotated in the clockwise direction. Since it is rotated, the engagement between the notch 21a and the roller pin 25a is disengaged to release the release maintained state (locked state), the tip of the stopper 21 moves toward the back of the housing 11, and the door 13 is closed. It is like that.

  As can be seen from FIG. 1, a stopper 21 and a locking bracket 24 are provided on the upper surface of the telephone body 12, and a blank space for arranging additional parts is limited, but in this embodiment, As described above, the solenoid 29 is disposed in substantially the same direction as the stopper 21, and the linear movement of the plunger 29 a of the solenoid 29 is provided at the tip of the stopper 21 via the lever 28. Since the lock release pin 26 is converted into a movement in a pressing direction to release the release maintenance state (lock state), the lock release mechanism can be operated even in a relatively narrow space on the upper surface of the telephone body 12. It can be arranged.

Furthermore, an arcuate sliding portion 21b is formed in the notch 21a at the tip of the stopper 21, and when the roller pin 25a is applied to the sliding portion 21b even a little, the automatic closing hinges 18a and 18b act on the stopper 21. The component force of the force to act works in the direction in which the stopper 21 is rotated. Therefore, even if the driving force of the solenoid 29 is small, in other words, even if the solenoid 29 having a small driving force of the solenoid 29 is used, the engagement between the notch 21a of the stopper 21 and the roller pin 25a is easily released. The maintenance state (locked state) can be released.
Since the solenoid 29 having such a small driving force can be used to release the released state of the stopper 21, as described above, the solenoid can be driven only by the charge of the capacitor, thereby The effect is achieved that it is not necessary to replace the existing power supply device with a power supply device having a high current supply capability.

Although the invention made by the present inventor has been specifically described based on the embodiment, the present invention is not limited to the embodiment. For example, in the embodiment, a solenoid is used to unlock the stopper 21, but a motor may be used. In the above embodiment, the stopper 21 and its unlocking mechanism are provided on the upper surface of the telephone body, but may be provided on the lower surface of the telephone body. Alternatively, an on-hook signal may be input to the control unit 41 of the control box 14 so that the timer does not start while the handset 16 is disconnected from the hook 17. As a result, even if the work time exceeds the set time of the setting device 44A, the lock release mechanism can be prevented from operating during a call.
Furthermore, in the above-described embodiment, the case where the present invention is applied to a telephone along a railway line has been described. However, the present invention can be generally used for a control box disposed outdoors such as along a railway.

10 Line-side telephone 11 Housing 12 Telephone body 13 Door 14 Control box (control means)
15 Dial push button group 16 Handset 18a, 18b Automatic closing hinge 20 Lock release mechanism 21 Stopper 21a Notch (engagement part)
25a Roller pin (locking means)
28 Actuating lever 29 Solenoid (drive source)
42 power supply 43 operation means (reset button)
51A, 51B capacitors (charge storage means)

Claims (5)

A housing that houses the telephone body, a door provided on the opening surface of the housing, and an automatic closing mechanism that supports the door so that it can be opened and closed with respect to the housing, and urges the door to close. A railway phone with a hinge,
A stopper capable of maintaining the door open against the force of the automatic closing hinge;
Release means comprising a drive source and capable of releasing the open maintenance state of the stopper;
Control means for operating the drive source,
The control means includes a timer, and starts counting the timer when the door is released, and operates the driving source of the release means when the timer determines that a predetermined time has elapsed, A telephone along the line that is configured to release the open maintenance state. A notification means capable of generating a sound or a warning, and an operation means for resetting the timer,
The railroad telephone according to claim 1, wherein the control unit causes the notification unit to notify that the release unit is activated before the timer measures a predetermined time. A power supply device that supplies power to the telephone body and detection means that can detect the open / closed state of the door are provided, and power is supplied to the telephone body from the power supply device while the door is open. ,
The control means includes a charge storage means and a charging means capable of charging the charge storage means with a constant current, and the telephone main body during operation of the telephone main body from the maximum current that can be supplied by the power supply device while the door is opened. When the charge storage means is charged with the remaining current or a part of the current subtracted from the current, and when the timer determines that a predetermined time has elapsed, the drive source of the release means is charged with the charge charge of the charge storage means The telephone along the line according to claim 1 or 2, characterized in that the telephone is operated at the same time. The stopper is substantially linear and has an engagement portion that can be engaged with a locking means provided on the housing side on the distal end side, and a base end portion is rotatably attached to the inner surface of the door. In addition, the spring is urged to rotate in a direction in which the locking means engages the engagement portion by a spring,
The drive source is composed of a solenoid, and the solenoid is arranged so that the plunger can move in a direction substantially parallel to the movement direction of the stopper.
The releasing means includes an operating lever that is brought into contact with the tip of the stopper and is rotated by the solenoid, and when the operating lever is rotated, the engagement between the locking means and the engaging portion is released. It is comprised as follows. The along-line telephone in any one of Claims 1-3 characterized by the above-mentioned.   The locking means is a roller pin having a bearing, the engaging portion is a notch formed in the stopper, and the notch has a first surface and a second surface that form approximately 90 degrees with each other, The first surface is in contact with the roller pin to prevent the door from being closed by the force of the automatic closing hinge, and the second surface is in contact with the outer peripheral surface of the roller pin to open the door by the stopper. 5. The line telephone according to claim 4, wherein a sliding portion having an arcuate outer surface is formed from the first surface of the notch to a side surface of the stopper while maintaining the state.

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