JPH08163204A - Data line switching device - Google Patents

Abstract

(57) [Summary] [Object] To provide a data line switching device capable of transferring data to another portable terminal without the need for the portable terminal to transfer the data to the host control device. [Structure] The line switching unit 21 is a second connecting unit for connecting the portable terminals 3 to 5 and at least one other portable terminal, for example, AND gates 9, 10, 11, 12, 1 and 2.
3, 14, and 22 are provided. [Effect] It is possible to save the time for transfer and improve the efficiency of the data line switching device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data line switching device used by connecting to a plurality of data transmitting / receiving devices.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing a conventional data line switching device.

As shown in FIG. 2, a conventional data line switching device 1 includes a host control device, for example, a personal computer 2 installed at a sales office and a plurality of terminal devices, for example, portable terminals 3 to 5 carried by maintenance personnel. And a line switching unit 7 controlled by the personal computer 2 via the switching signal line 15 and a line switching unit 7 switched by the output of the line control unit 6. The line switching unit 7 has an OR gate 8 connected to the personal computer 2 at one end and an O gate at one end.
R gate 8, the other end is portable terminal 3 and switching control line 16
An AND gate 9 connected to the line control unit 6 via
An AND gate 10 having one end connected to the line control unit 6 via the portable terminal 3 and the other end connected to the personal computer 2 and the switching control line 16, one end connected to the OR gate 8, and the other end connected to the portable terminal 4 and the switching control line. A connected to the line control unit 6 via 17
An ND gate 11, an AND gate 12 having one end connected to the portable terminal 4 and the other end connected to the line control unit 6 via the personal computer 2 and the switching control line 17, an OR gate 8 at one end, and a portable terminal at the other end. An AND gate 13 connected to the line control unit 6 via the switch control line 18 and the switch 5, and one end connected to the mobile terminal 5 and the other end connected to the line control unit 6 via the personal computer 2 and the switch control line 18. AND gate 14.

The data line switching device 1 can be used, for example, when performing maintenance or inspection work on an elevator or a passenger conveyor. That is, by connecting the portable terminals 3 to 5 carried by each maintenance person to the data line switching device 1, data necessary for maintenance and inspection is transferred from the personal computer 2 via the data line switching device 1, and each maintenance is performed. The staff brings the portable terminals 3 to 5 storing these data and uses them on site. After the work is completed, maintenance and inspection results, mail information, etc. are input from the keyboard, stored, taken home, and transferred to the personal computer 2.

[0005]

By the way, in the above-mentioned conventional technique, the portable terminals 3 to 5 are simply connected to the personal computer 2 through the data line switching device 1 in a one-to-one correspondence. I could only transfer data to 2. Therefore, the portable terminals 3 to 5 are the portable terminals 3 to 5
5 when transferring data to the mobile terminal 5, that is, when the mail information input to the mobile terminal 3 is transferred to the mobile terminal 5 of another maintenance person, the mobile terminal 3
Data is once transferred to the personal computer 2 via the data line switching device 1, and then the personal computer 2 retransfers the data to the portable terminal 5 via the data line switching device 1. In this case, the data line switching device 1 requires a lot of time for data transfer, and during that time, another device cannot use the data line switching device 1 for data transfer. It was

The present invention has been made in view of the above problems, and an object thereof is to transfer the data to another portable terminal without requiring the portable terminal to transfer the data to the host control device. It is to provide a data line switching device capable of performing the above.

[0007]

In order to achieve this object, the present invention provides a line control unit which is interposed between a host control device and a plurality of terminal devices and which is internally controlled by the host control device. In a data line switching device provided with a line switching unit that is switched by the output of this line control unit,
The line switching unit and at least one of the host control device
One of the terminal devices is connected to the first connection device, and at least one other terminal device is connected to the second connection device.

[0008]

Since the present invention is configured as described above, the line control section, based on a command from the host control device, connects the host control device and at least one of the terminal devices, and the terminal. Either or both of the second connection means for connecting the device and at least one other terminal device are selected. Accordingly, one arbitrary device and one or more other devices are line-connected between the host control device and the terminal device, and data is transferred through these connected lines. There is. As a result, the terminal device, that is, the portable terminal can transfer the data to another portable terminal without the need to transfer the data to the host control device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a data line switching device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a data line switching device of the present invention. The same components as those shown in FIG. 2 described above are designated by the same reference numerals. That is, 2 is a personal computer, 3 to 5 are portable terminals,
Reference numeral 6 is a line control unit, 8 is an OR gate, 9 to 14 are AND gates, 15 is a switching signal line, and 16 to 18 are switching control lines.

As shown in FIG. 1, the data line switching device 20 of the present embodiment has a line switching unit 21 with one end of a personal computer 2,
The other end is connected to the line control unit 6 via the OR gate 8 and the switching control line 27, one end is connected to the OR gates 24 to 26 described later, and the other end is connected to the line control unit 6 and the personal computer 2. AND gate 23 and one end is A
An ND gate 10, an OR gate 24 having the other end connected to an AND gate 23 and OR gates 25 and 26 described later.
AND gate 12 at one end and AND gate 2 at the other end
3, an OR gate 24 connected to an OR gate 24, and an OR gate 26 described later, and an AND gate 1 at one end.
4, the other end is an AND gate 23, and an OR gate 24,
And an OR gate 26 connected to 25.

The first connecting means for connecting the above-mentioned host control device, that is, the personal computer 2 and at least one terminal device, that is, the portable terminals 3 to 5, is
For example, AND gates 9, 10, 11, 12, 13, 1
4, 23 and the terminal device, that is, the portable terminal 3 to
5 and the other at least one terminal device, that is, the second connection means for connecting the portable terminals 3 to 5,
AND gates 9, 10, 11, 12, 13, 14, 22
It consists of

In this embodiment, the line switching signal output from the personal computer 2 is sent to the line control unit 6 via the switching signal line 15, and the line control unit 6 sends the line based on the switching signal. Waiting for a connection command. After outputting the line switching signal, the personal computer 2 outputs a line connection command having data indicating which device of the portable terminals 3 to 5 is connected. Then, based on this line connection command, the line control unit 6 causes the switching control lines 16, 17, 1
The connection is switched by turning ON / OFF the switches 8 and 27. For example, when trying to connect the personal computer 2 and the portable terminals 4 and 5, respectively, the line control unit 2 uses the switching control line 1
Turn on 6, 17, and 27. Along with this, the data output from the personal computer 2 and the portable terminals 4 and 5 can pass through the AND gates 9, 11 and 23,
On the other hand, the data output from the portable terminal 5 cannot proceed beyond the AND gate 14 because the switching control line 18 is OFF. As a result, the data output by the personal computer 2 is transferred to the AND gate 23 and then to the OR gate 2.
Pass through 4, 25, 26. At this time, the switching control line 1
Since 6 and 17 are ON, the data passes through the AND gates 10 and 12 and is sent to the portable terminals 3 and 4, while the switching control line 18 is OFF, so the data is transmitted to the AND gate 14. It cannot pass and is not sent to the portable terminal 5.

The data output from the portable terminal 3 passes through the AND gate 9 and the OR gate 8 and passes through the AND gate 8 and is sent to the personal computer 2 because the switching control line 27 is ON. At the same time, since it passes through the OR gate 25 and the switching control line 17 is turned on, it passes through the AND gate 12 and is sent to the portable terminal 4 without being transferred to the personal computer 2. The data output from the mobile terminal 4 is also the same as the processing of the data output from the mobile terminal 3 described above, and thus description thereof will be omitted.

In the embodiment configured as described above, the terminal device, that is, any one of the portable terminals 3 to 5 does not require data transfer to the host control device, that is, the personal computer 2, and other portable terminals. The data can be transferred to 3-5.

[0015]

Since the present invention is configured as described above, the portable terminal can transfer the data to another portable terminal without the need to transfer the data to the host control device. , The time for transfer can be saved, and the efficiency of the data line switching device can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a data line switching device of the present invention.

FIG. 2 is a block diagram showing a conventional data line switching device.

[Explanation of symbols]

 2 personal computer (host control device) 3 to 5 portable terminal (terminal device) 6 line control unit 20 data line switching device 21 line switching unit 22 and 23 AND gate 24-26 OR gate

Claims (3)

[Claims] 1. A line control unit which is interposed between a host control device and a plurality of terminal devices and which is controlled by the host control device, and a line switching unit which is switched by the output of the line control unit. In the data line switching device, the line switching unit is provided with at least one of the host control device.
A data line switching device, comprising: a first connecting means for connecting one of the terminal devices and a second connecting means for connecting the terminal device and at least one other terminal device. 2. The data line switching device according to claim 1, wherein the first connecting means and the second connecting means include an AND gate controlled by a line control unit. 3. The data according to claim 1, wherein the host control device is a personal computer installed in a sales office, and the plurality of terminal devices are portable terminals carried by maintenance personnel. Line switching device.