Abstract:
Without performing serious work of connection by connector attachment etc. on the spot, it can operate at a factory and the principal cable can be wired using the branch implement that can be attached by easy work on the spot. In addition, the ratio of the number of optical core wires of the external wiring in reserve and the branch cable for stories can be freely chosen, and change when demand change arises and the increase in a circuit can also be performed very easily.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    The present invention is related to a wiring of the optical fiber cable to the buildings such as office buildings.  
           [0002]    In the buildings such as an office building, the predetermined tape core wire or taped optical core wire in a principal cable in optical-communications hung from the upper part of the building and connected to the precincts-optical cabinet PT, which is installed at the underground in the building, connected to the principal cable from outside of the building connects to fuse together, mechanically and using connector with the precincts-cabinet PD which installed in the predetermined story. In addition, an optical cable from the precincts-cabinet for the story and a vertical story is connected with the network channel terminal equipment.  
           [0003]    In the conventional principal cable which hangs in the building, it is used to remove the sheath of a predetermined position in the installation spot and connected the taped core wire thereof to the precincts-cabinet PD. Therefore, it had to work connector attachment, mechanical connection, etc. there, and had the fault that the work is serious and trouble started.  
           [0004]    When demand change arose, while it could not change easily, in the increase in a circuit, additional wiring had to be operated, and there was a fault that the work became serious.  
         SUMMARY OF THE INVENTION  
         [0005]    In light of the forgoing, without performing serious work of connection by connector attachment etc. on the spot, it can operate at a factory and the principal cable can be wired using the branch implement that can be attached by easy work on the spot. In addition, the ratio of the number of optical core wires of the external wiring in reserve and the branch cable for stories can be freely chosen, and change when demand change arises and the increase in a circuit can also be performed very easily.  
           [0006]    The novel features which are believed to be characteristic of the invention, both as to its organization and method of operation, together with further objects and advantages thereof, are described below with reference to the accompanying drawings in which a presently preferred embodiment of the invention is illustrated as an example.  
           [0007]    It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only, and are not intended as a definition of the limits of the invention. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0008]    [0008]FIG. 1 is an explanation view in use of a first embodiment of the present invention;  
         [0009]    [0009]FIG. 2 is a schematic explanation view showing the first embodiment of the present invention;  
         [0010]    [0010]FIG. 3 is an explanation view of a connector portion of the first embodiment of the present invention;  
         [0011]    [0011]FIG. 4 is an explanation view in use of a second embodiment of the present invention;  
         [0012]    [0012]FIG. 5 is a schematic explanation view of the second embodiment of the present invention;  
         [0013]    [0013]FIG. 6 is an explanation view of a connector portion of the second embodiment of the present invention;  
         [0014]    [0014]FIG. 7 is an explanation view in use of a third embodiment of the present invention;  
         [0015]    [0015]FIG. 8 is a schematic explanation view of showing the third embodiment of the present invention;  
         [0016]    [0016]FIG. 9 is an explanation view in use of a fourth embodiment of the present invention;  
         [0017]    [0017]FIG. 10 is a schematic explanation view of showing the fourth embodiment of the present invention;  
         [0018]    [0018]FIG. 11 is an explanation view in use of a fifth embodiment of the present invention;  
         [0019]    [0019]FIG. 12 is a schematic explanation view of showing the fifth embodiment of the present invention;  
         [0020]    [0020]FIG. 13 is an explanation view in use of a sixth embodiment of the present invention;  
         [0021]    [0021]FIG. 14 is a schematic explanation view of showing the sixth embodiment of the present invention;  
         [0022]    [0022]FIG. 15 is an explanation view of an optical-communications principal cable of the sixth embodiment of the present invention;  
         [0023]    [0023]FIG. 16 is an expanded cross sectional view taken the line  16 - 16  of FIG. 15;  
         [0024]    [0024]FIG. 17 is an explanation view in use of a seventh embodiment of the present invention;  
         [0025]    [0025]FIG. 18 is a schematic explanation view of showing the seventh embodiment of the present invention;  
         [0026]    [0026]FIG. 19 is an explanation view of an optical-communications principal cable of the seventh embodiment of the present; and  
         [0027]    [0027]FIG. 20 an expanded cross sectional view taken the line  20 - 20  of FIG. 19; 
     
    
     DETAILED DESCRIPTION  
       [0028]    Preferred embodiments of the present invention are described in more detail below referring to the accompanying drawings. An understanding of the present invention may be best gained by reference FIGS.  1  to  3 . FIGS.  1  to  3  illustrate a wiring of the optical fiber cable to the buildings of a first embodiment of the present invention.  
         [0029]    The numeral  1  shows the wiring of the optical fiber cable to the buildings  2  such as an office building. The wiring is composed of a principal cable  8  for optical communication, a plurality of branch cables  12  for story, a plurality of external wirings  13  for reserve and a plurality of connector parts  14 .  
         [0030]    The principal cable  8  is wired with hanging from an upper story of the building  2  to a lower story thereof so as to pass through holes  3  formed at a floor surface in each story. The principal cable  8  includes that a plurality of optical core wires or taped optical core wires  4  and  4 A for story used on each story or a required story and in reserve used at the time of the object and demand change that is covered by the sheath  5 . Also the principal cable  8  includes an engaging implement  6  provided at an upper portion thereof is engaged by a hanging implement  7  provided at the upper portion thereof.  
         [0031]    The plurality of branch cables  12  for story are branched the optical core wire or the taped optical core wire  4  for story of the principal cable  8  in each story portion or a required story portion using a branch implement  9 , respectively, and are connected to an optical wiring box  10  for story at a connector  11 .  
         [0032]    The plurality of external wirings  13  in reserve includes optical core wire or taped optical core wire  4 B, having a lower end portion thereof passed the through holes  3  formed in the floor surface of each story and wired in the lower part of the building  2 , and having an upper end portion thereof connected with the upper end of the optical core wire for the reserves or taped optical core wire  4 A of the principal cable  8  by the connector  11 , respectively.  
         [0033]    The plurality of the connector parts  14  is interposed in each story corresponding to the external wirings  13 .  
         [0034]    In the wiring  1  of the optical fiber cable to the building of the above-mentioned composition, the optical core wire or tape optical core wires  4  and  4 A of a lower end of the principal cable  8  is connected in the connector to the terminal board (not shown) connected to the external circuit, the optical core wire of the lower part of the external wiring  13  or taped optical core wire  4 B is connected with the connector  11 .  
         [0035]    The case where demand change arises, it can wire only by connecting a branch cable (not shown) to the connector connection part  14  of the part that the external wiring  13  needs.  
         [0036]    Other embodiments of the present invention will now be described referring to FIGS.  4  to  20 . Through the drawings of the embodiments, like components are denoted by like numerals as of the first embodiment and will not be further explained in great detail.  
         [0037]    A second embodiment of the present invention is shown in FIGS.  4  to  6 . It is distinguished from the first embodiment by the fact that the connector connection parts  14  and  14  are interposed in a half optical core wire or taped core wire  4 B mostly for every floor respectively so that it might become the different story of the external wiring  13  in reserve. Thus, the wiring  1 A of the optical fiber cable to the building is performed so that the connector connection part  14  of the external wiring  13  can be reduced in half.  
         [0038]    A third embodiment of the present invention is shown in FIGS. 7 and 8. It is distinguished from the first embodiment by the fact that the combination of the principal cable  8  for story and principal cable  8 A in reserve are used. A wiring  1 B in this way according to the third embodiment has similar advantages to that according to the first embodiment.  
         [0039]    A forth embodiment of the present invention is shown in FIGS. 9 and 10. It is distinguished from the first embodiment by the fact that the plurality of optical core wire or taped optical core wire  4  is replaced from another optical core wire or taped optical core wire  4 C. The optical core wire or taped optical core wire  4 C is for story and reserves, being wired so as to place at the lower story by passing through the ends thereof into the hole  3  formed at the floor surface of each floor, respectively, by substantially center portion thereof placed near the hanging implement  7  provided at the upper portion of the building by the engaging implement  6 . The connector connection parts  14  are interposed at each story of the optical core wire or taped optical core wire  4 C respectively. In addition, the branch cables  12  are connected with the connector connection part  14  placed at the necessary story or each story respectively. A wiring  1 C in this way according to the third embodiment has similar advantages to that according to the first embodiment.  
         [0040]    A fifth embodiment of the present invention is shown in FIGS. 11 and 12. It is distinguished from the fourth embodiment by the fact that the connector connection parts  14  and  14  are interposed in a half optical core wire or taped optical core wire  4 B mostly for every floor so that it might become the different story of the external wiring  13  in reserve. A wiring  1 C in this way according to the forth embodiment has similar advantages to that according to the first embodiment. Also the connector connection part  14  of the external wiring  13  can be reduced.  
         [0041]    A sixth embodiment of the present invention is shown in FIGS. 13 and 16. It is distinguished from the first embodiment by the fact that a principal cable  8 A has insertion hole  15  into the sheath  5 . A plurality of external wirings  13 A in reserve includes the optical core wire or taped optical core wire  4 A, both ends to project outwardly thereof inserted into the external wiring insertion hole  15  between the portions which removed the sheath  5  in order to branch the branch cable  12  for story of the principal cable  8 A and connected with the connector  11  respectively. An upper connector  11  connects the upper end of the external wirings  13 A and optical core wire or tape optical core wires  4 A of the principal cable  8 . The wiring  1 E in this way according to the sixth embodiment has similar advantages to that according to the first embodiment. Also the wiring based on one principal cable  8 A into the building can conduct.  
         [0042]    A seventh embodiment of the present invention is shown in FIGS. 17 and 20. It is distinguished from the sixth embodiment by the fact that a principal cable  8 B covered with the sheath  5  is used so as to include the optical core wires for story or taped optical core wire  4  and external wiring insertion holes  15 . A wiring IF with the principal cable  8 B according to the seventh embodiment has similar advantages to that according to the sixth embodiment.  
         [0043]    As set forth above, the advantages of the invention are as follows:  
         [0044]    (1) A wiring of the optical fiber cable to the buildings comprises a principal cable for optical communication wired with hanging from the upper portion of a building to the lower portion thereof, including a plurality of optical core wires or taped optical core wires for stories used on each story or a required story and in reserve used at the time of the demand change and which is covered by a sheath; a plurality of branch cables for story branched the optical core wires or the taped optical core wires for story of the principal cable in each story portion or a required story portion; a plurality of external cables in reserve including optical core wire or taped optical core wire, having a lower end portion thereof wired downwardly in the lower part of the building, and having an upper end portion thereof connected with the upper end of the optical core wire in reserve or taped optical core wire of the principal cable by a connector; and a plurality of connector parts interposed in each story or required story corresponding to the external cables in reserve. Accordingly, the wiring work can be performed when the demand change arises so that the branch cable is connected with the connector part of the external wiring in reserve.  
         [0045]    Therefore, the wiring work at the time of demand change is easy, and can carry out for a short time.  
         [0046]    (2) As discussed above, since structure is easy, it can install easily.  
         [0047]    (3) As discussed above, since optical core wires or taped optical core wire of the external wiring in reserve when in demand change are wired in the shape of a loop, selection use can be performed easily and it can be used for two circuits by one.  
         [0048]    (4) As discussed above, since it can wire on the basis of one principal cable, wiring work expense and the borrowing expense of a wiring floor can be managed with one duty, and are made cheaply.  
         [0049]    (5) As discussed above, also claims 2 and 3 are acquired the effect as same as the above-mentioned (1)-(3).  
         [0050]    (6) As discussed above, also claims 2 and 3 are acquired the effect as same as the above-mentioned (1)-(4).