JP3945366B2 - Repeater unit assembly device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digital wireless communication system, and more particularly to a collective device that accommodates a large number of repeater units used in the system.
[0002]
[Background]
As is well known, in a factory, a plant, a construction site, etc., a digital radio communication system (equipment) of a high frequency band such as 1.9 GHz is used for information exchange and emergency communication between the management department and the site. It has been.
[0003]
That is, in this digital radio communication system, a large number of mobile terminals 4 perform radio communication via a plurality of base stations 3 coupled by a signal line 2 to a private branch exchange 1 that is a main apparatus.
[0004]
By the way, if the distance from the private branch exchange 1 to the base station 3 in the digital radio communication system becomes long and the length of the signal line 2 (cable) exceeds about 1 km, signal degradation occurs due to voltage drop or the like. In a scale factory or a wide area plant, a repeater 5 (signal waveform equalizer) as shown in FIG. 6 needs to be installed between the private branch exchange 1 and each base station 3.
[0005]
That is, this repeater 5 (signal waveform equalizer) is installed between the signal line 2 between the private branch exchange 1 and each base station 3, and according to the repeater 5 that performs power supply and signal regeneration, The substantial communication distance between the private branch exchange 1 and each base station 3 can be extended.
[0006]
[Problems to be solved by the invention]
By the way, in a large-scale facility such as an oil plant, a large number of base stations 3 are installed in a wide area. Along with this, a large number of repeaters 5 are attached between the private branch exchange 1 and each base station 3. It will be.
However, if a large number of repeaters 5 for such purposes are installed randomly at various positions, the operation status is confirmed at each repeater 5 position at the time of inspection such as when a system fails or during maintenance work. The repeater 5 must be replaced, and the work efficiency is remarkably deteriorated.
[0007]
For this reason, in the past, a number of repeater units contained in a case have been devised to be housed in a single cabinet. It is not easy to replace.
[0008]
An object of the present invention is to provide a repeater unit that can easily identify a repeater unit having a failure or abnormality and can easily add or replace the repeater unit in view of the current state of the conventional repeater unit assembly apparatus as described above. In getting the gathering device.
[0009]
[Means for Solving the Problems]
According to the present invention, a digital wireless communication facility comprising a plurality of repeater units respectively installed between a private branch exchange having a switching function and a plurality of base stations coupled to the same through a signal line. A cabinet with a front door having a capacity capable of accommodating the repeater unit, and a plurality of parallel shelves with the repeater unit mounted in parallel on the surface and having a lower front side , a horizontal surface on the inner side surface of the cabinet A plurality of sets of support pins that are aligned in a direction inclined with respect to each other are provided, and a long hole that engages with a guide pin provided corresponding to each support pin of each set is formed at the rear side wall of each shelf plate, the stopper for stopping the sliding of the shelf plates engaged with the support pin is provided on the lower edge of the shelf plate sidewall, before the repeater unit from the front of the cabinet with open doors Radical 113 visible in unison, each shelf plate is achieved by a repeater unit and collecting apparatus that can be removed from the cabinet separately.
[0010]
Therefore, according to the repeater unit assembly apparatus of the present invention, it is possible to attach to the cabinet only by inserting the long hole of the shelf board on which the repeater unit is mounted in alignment with the guide pin and releasing the hand. Further, in the repeater unit assembly apparatus, in order to remove the shelf board, there is an advantage that it can be easily removed simply by pulling it forward while holding the front side of the shelf board and lifting it up slightly.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The details of the embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is a conceptual diagram of a digital wireless communication system (equipment) incorporating a repeater unit assembly apparatus 10 of the present invention.
[0012]
That is, the private branch exchange apparatus 1 installed in a plant management building or the like is connected to a repeater unit assembly apparatus 10, which will be described in detail later, by a signal line 2, and is connected to a large number of repeater units 20 accommodated in the repeater unit assembly apparatus 10. A large number of mobile terminals 4 can communicate with each other via an antenna that is individually connected to a large number of connected base stations 3 and is electrically coupled to these base stations 3.
[0013]
2 and 3 show the entire repeater unit assembly apparatus 10 according to the present invention, and this repeater unit assembly apparatus 10 has a steel cabinet 11 that can be installed in a back-to-back state with respect to a wall surface of a building that is not shown. In the internal space of the cabinet 11, a large number of repeater units 20 can be stored in parallel.
Moreover, the cabinet 11 incorporating the switchboard 40 (FIG. 2) in the lower part is provided with a front door 11a of a right hinge, and the numerous repeater units 20 and the switchboard 40 accommodated by opening the front door 11a are exposed to the outside. it can.
[0014]
In the opened state of the front door 11a, the display unit 21 (FIG. 4) of the accommodated front repeater unit 20 can be seen with a single view, and the repeater unit 20 that is inoperative or abnormally operated can be known directly.
In addition, an internal connection terminal 41 coupled to each repeater unit 20 is provided at the center of the switchboard 40 via a connection through the through-hole 12 on the inner wall surface of the cabinet 11. An exchange side terminal 42 to which the signal line 2 leading to 1 is coupled and a station line terminal 43 coupled to each external base station 3 are arranged.
[0015]
Support means adjacent in the vertical direction are provided on the inner wall surface of the cabinet 11, and a plurality of shelf boards 51 tilted with the front side down are supported by these support means.
As shown in FIG. 2, four repeater units 20 aligned in the left-right direction are mounted on each shelf board 51, but the display unit 21 of the repeater unit 20 is arbitrarily arranged. As can be understood from FIG. 4, it is positioned below the shelf plate 51, that is, in front of the cabinet 11. For this reason, if the display part 21 of the front repeater unit 20 can be placed in the field of view if it is set at a position slightly away from the cabinet 11, the repeater unit 20 that is not operating or operating abnormally can be easily viewed with a view. Can know.
[0016]
FIG. 4 shows a specific example of the support means of the shelf board 51, and each support means is composed of two sets of left and right front support pins 61 and rear support pins 62 that are installed with the front side facing down. The
That is, for each set of front support pins 61 and rear support pins 62 fixed to the left and right inner wall surfaces of the cabinet 11 in a cantilever state, corresponding shelves each having four repeater units 20 mounted on the surface. Although the plate 51 is placed, guide pins 71 facing the front support pins 61 and the rear support pins 62 of each set are fixed to the inner surface of the cabinet 11, and these guide pins 71 are attached to the side walls 52 of the shelf plate 51. The long hole 53 to be formed is engaged.
Further, since a stopper 54 for preventing the shelves 51 from slipping is formed on the lower edge of the side wall 52 of the shelf 51 facing each front support pin 61, the engagement between the stopper 54 and the front support pin 61 is enhanced. As a result, each shelf board 51 is held at the position indicated by the solid line in FIG.
[0017]
An inner wall surface of the cabinet 11 is formed with a large number of through holes 12 corresponding to the shelf plates 51 and introduction holes 13 through which a group of wires passing through these through holes 12 can be passed. The extra length of the signal line 2 connected to the corresponding repeater unit 20 can be inserted.
[0018]
Since the repeater unit assembly apparatus 10 according to the embodiment has the above-described configuration, a large number of accommodated repeater units 20 are aligned vertically with the front portion down. For this reason, since the display part 21 in the front upper surface of each repeater unit 20 is completely exposed in front of the cabinet 11, the display of the front part blinking when standing at a position slightly away from the cabinet 11. It is possible to easily recognize the non-operating or abnormally operating repeater unit 20 simply by looking at the portion 21.
[0019]
Further, when a new repeater unit 20 is added or a failed repeater unit 20 is replaced, the corresponding shelf 51 can be removed from the cabinet 11 to perform external work. That is, in order to remove the shelf board 51, as shown by the arrow in FIG. 4, if the shelf board 51 is pushed slightly, the stopper 54 is removed from the front support pin 61, so that the front part of the shelf board 51 is illustrated. When lifted to a substantially horizontal state as shown in FIG. 5, the shelf board 51 is rotated with the guide pin 71 as a fulcrum, and the side wall 52 of the shelf board 51 is completely detached from both the front support pins 61 and the rear support pins 62.
Therefore, if the shelf 51 is pulled forward while supporting the weight applied to the shelf 51 by hand, the long hole 53 is removed from the guide pin 71, so that a new repeater unit 20 can be assembled outside the cabinet 11 or a fault repeater can be removed. The unit 20 can be replaced.
[0020]
In order to return the shelf 51 after repair and assembly of the repeater unit 20 to the cabinet 11, contrary to the above, the elongated holes 53 are aligned with the guide pins 71 to keep the shelf 51 in a substantially horizontal state. If the shelf 51 is pushed into the interior of the cabinet 11 and the front part of the shelf 51 is lowered in the fully pushed state, the lower edge of the side wall 52 of the shelf 51 becomes the front support pins 61 and the rear part. It abuts on the support pin 62.
Therefore, if the hand is released from the shelf 51 in this state, the shelf 51 is slightly lowered along both the front support pins 61 and the rear support pins 62, and the position where the stopper 54 is in contact with the front support pins 61. The shelf board 51 will not be detached from the cabinet 11 even if some vibration is applied.
[0021]
In the illustrated embodiment, the example of the stopper 54 processed into the protrusion shape is illustrated, but the stopper 54 may be processed into an “L” shape that can be engaged with the front support pin 61, According to the “L” -shaped stopper 54, the engagement state with respect to the front support pin 61 is a locked state, so that a structure that is safe against shaking such as an earthquake can be obtained.
[0022]
【The invention's effect】
As is clear from the above description, in the repeater unit assembly apparatus of the present invention, since the display section of a large number of repeater units stored in the cabinet can be seen, not only the failed repeater unit can be easily found, Repeater units can be added or replaced outside the cabinet, and shelves can be easily attached and detached.
In addition, since the repeater unit assembly apparatus of the present invention can be installed back-to-back on the indoor wall surface, the indoor space can be used effectively, and the maintenance of the repeater unit can be performed simply by opening the front door. There is an advantage that the operation state can be monitored and work can be performed.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a digital wireless communication system incorporating a repeater unit assembly apparatus according to the present invention.
FIG. 2 is a front view of the repeater unit assembly apparatus in a state where a front door is opened.
3 is a cross-sectional view taken along line 3-3 in FIG.
4 is an enlarged cross-sectional view of a main part of FIG. 3 showing one repeater unit.
FIG. 5 is an explanatory diagram of the operation of removing the repeater unit during maintenance.
FIG. 6 is a conceptual diagram of a conventional digital radio communication system using a repeater unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Private branch exchange 2 Signal line 3 Base station 4 Mobile terminal 5 Repeater 10 Repeater unit assembly apparatus 11 Cabinet 11a Front door 20 Repeater unit 21 Display part 30 Antenna 40 Distribution board 51 Shelf board 52 Side wall 53 Long hole 54 Stopper 61 Front support pin 62 Rear support pin 71 Guide pin

Claims (1)

In a digital wireless communication facility having a plurality of repeater units respectively installed between a private branch exchange having a switching function and a plurality of base stations coupled to the same through a signal line, the capacity of the repeater unit can be accommodated. A cabinet with a front door; and a plurality of parallel shelves mounted on the surface in parallel with the repeater unit and having a lower front side, and a plurality of the inner side surfaces of the cabinet aligned in a direction inclined with respect to a horizontal plane A pair of support pins is provided, and a long hole that engages with a guide pin provided corresponding to each set of the support pins is formed at the rear side of each side wall of each shelf, and the lower edge of the side wall of the shelf is a stopper for stopping the sliding of engaging with the shelf plates are provided in the support pin, before visible from the front of the cabinet with open doors simultaneously display unit of the repeater unit, the Shelf board repeater unit group apparatus characterized by removable from the cabinet separately.

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