APPARATUS FOR PLACING RUBBER PINS BACKGROUND OF THE INVENTION Field of the invention The present invention relates to an apparatus for placing rubber pins on the end of a wire. Description of the related art. The present disclosure refers to the subject matter of the Japanese open patent application number HEI 7-7833, filed on May 2, 1994, the presentation of which is hereby expressly incorporated by reference in its entirety. Figures 1 to 3 are views of schematic configuration illustrating the respective steps of the rubber pin placement apparatus. In Figures 1 to 3, a rubber pin feed unit 2, a rubber pin positioning unit 3 and a rubber pin holder 4 are respectively positioned at 90 ° intervals around the center of rotation of a unit rotating 1 and in positions that correspond to an external periphery thereof. The rotating unit 1 has rubber pin retaining rods 1 (a) positioned respectively at 90 ° intervals and which can be rotated in a rotatable manner. The rubber plug feeding unit 2 has a rubber plug housing passage 2 (a) where several rubber pins 5 are placed, and comprises an internal connector 2 (b) which can be moved from a position in which the inner connector 2 (b) is inserted in a wire through hole (not shown) of the first of the rubber pins 5 that have been housed in the rubber plug housing passage 2 (a) to a position where the pin of front rubber 5 rests on the rubber pin retaining rod 1 (a) of the rotary unit 1 and a push rod 2 (c) for pushing the front rubber plug 5 into rubber pin holding rod 1 (a) of the rotary unit 1. The rubber pin placement unit 3 has a positioning plate 3 (a) formed with a small hole 3 (b), and a positioning plate 3 (a) can be moved between a spaced position (illustrated in figure 1) where it is spaced apart from the rotary unit 1 and an approximate position (illustrated in figures 2 and 3) where it approaches the rotary unit 1. Likewise, the rubber pin holder 4 comprises a pair of rubber holding portions 4 (a), 4 (a) that can be opened / closed and that are movable between a spaced position (illustrated in FIG. 3) where they are spaced apart from the rotating unit 1 and an approximate position (illustrated in FIGS. ) where they approach the rotating unit 1, and a pair of wire guide portions 4 (b), 4 (b) that can be open / closed and that can be moved between a spaced position (illustrated in figures 1,2) ) where they are spaced apart from the pair of rubber pin holding portions 4 (a), (a) and an approximate position (illustrated in Figure 1) where they approach the pair of rubber pin holding portions, 4 (a ), 4 (a). A wire whose outer cover has been removed at its end portion a is placed in a position corresponding to the rubber pin holder 4. Next, the operation of the previous structure will be explained. Each rubber pin holding rod 1 (a) of the rotating unit 1 is stopped in positions corresponding to the rubber pin feed unit 2, the rubber pin placement unit 3 and the rubber pin holder 4 sequentially according to the rotation of the rotary unit 1. Then, in the position corresponding to the rubber pin feed unit 2, the internal connector 2 (b) passes through the wire through hole of the front pin of the pins. rubber pins 5 that have been housed in the rubber plug housing passage 2 (a) and a front end of the first plug 5 rest on the rubber plug holding rod 1 (a). After, the push rod 2 (c) pushes the front rubber plug 5 towards the side of the rubber pin holding rod 1 (a) and, through the pushing force of the push rod 2 (c) , the rubber plug 5 is guided by the internal connector 2 (b) for its placement on the rubber pin retaining rod 1 (a). In the position corresponding to the rubber pin placement unit 3, the positioning plate 3 (a) is moved from the spaced position to the approached position. During the movement of the positioning plate 3 (a), the rubber pin 5 is pushed by the positioning plate 3 (a) while the rubber pin holding rod 1 (a) is inserted into the hole small 3 (b). By this pushing action, the rubber plug 5 is placed in a predetermined position on the rubber pin holding rod 1 (a). In the position corresponding to the rubber pin holder 4, the rubber pin 5 is released from the rubber pin holding rod 1 (a) by means of the pair of rubber holding portions 4 (a), 4 ( a) and the pair of wire guide portions 4 (b), 4 (b), and the rubber plug 5 that has been released is placed on the wire W. In the conventional rubber plug fitting apparatus, without However, the inner connector 2 (b) is inserted in the rubber pin 5 to guide it, and it is necessary to establish the diameter of the internal connector 2 (b) so that it is equal to or smaller than the internal diameter (diameter of the wire through hole) of the rubber plug 5. Accordingly, for a plug a rubber plug 5 with a very small internal diameter, the diameter of the internal plug 2 (b) is reduced in accordance with the very small internal diameter, and the internal connector 2 (b) is easily breakable, resulting in a lack of durability of the internal connector 2 (b). Also, since the positioning of the rubber plug 5 that has been installed in the rubber pin holding rod 1 (a) is carried out through the rubber pin placement unit 3 independent of the power unit of rubber pins 2, there is a problem when, taking into consideration the entire body of the conventional rubber pin placement apparatus, its structure becomes complicated and its manufacturing cost increases. SUMMARY OF THE INVENTION Taking into account the above, the present invention has been achieved, an object of said invention is to offer an inexpensive rubber pin placement apparatus that can perform a rubber pin placement on a wire without the possibility of damaging parts. or the like regardless of the internal diameter of the rubber pin, which has excellent durability, and which can carry out the placement of the rubber pin with a simple structure where no dedicated positioning unit is employed. In accordance with a first aspect of the present invention, there is provided a rubber plug positioning apparatus, comprising: A rubber pin feed unit for feeding each of the rubber pins to a pin feed hole cucho; a rubber pin holder to hold one of the rubber pins to place the rubber pin over one end of a wire; and a rotating unit having a plurality of rubber pin holding rods positioned on each of the rubber pins to hold the rubber pins, the rotating unit rotatably displaces each of the rubber pin holding rods between the rubber pin feed unit and the rubber pin holder such that each of the rubber pins can be supplied from the rubber pin feed unit to the rubber pin holder through of each of the rubber pin retaining rods, where a pair of rubber pin guides are provided so that they can be opened / closed on one side of the rubber pin feed hole of the rubber pin feeder unit; and where guide grooves are provided respectively in positions of the pair of rubber pin guides facing the rubber pin feed holes, such that the guide grooves guide an outer periphery of each of the pegs of the rubber pegs. rubber moving from the rubber pin feed hole to one side of each rubber pin holding rod when the pair of rubber pin guides are in closed condition. In the rubber pin placement apparatus according to the first aspect, since a rubber pin is placed on each of the rubber pin holding rods by guiding the outer periphery of the rubber pin through respective slots of a pair of rubber pin guides, no weak portion occurs in the pair of rubber pin guides even when the inner diameter of the rubber pin is small, the rubber pin adjustment can be carried out without damaging parts of the rubber pin placement apparatus or the like regardless of the diameter of the rubber pin, and the durability of the rubber pin placement apparatus can be improved. Also, since no problem occurs such as damage to a part and since the feeding of rubber pins can be carried out safely, the rubber pin placement apparatus is prevented from stopping due to a failure of food, which results in an improvement in productivity. According to a second aspect of the present invention, which depends on the first aspect, a rubber pin placement apparatus is provided, where portions of plugs are respectively provided in the respective guide slots of the pair of rubber plug guides of Such a way that the plug portions limit the movement path of the rubber plug where the rubber plug moves from the rubber pin feed hole to the side of the rubber plug retaining rod. In the rubber pin placement apparatus according to the second aspect since plug portions are provided to limit the movement of a rubber plug moving from a rubber pin feed hole to one side of each rubber rod. When the rubber pins are clamped respectively in respective guide grooves of a pair of rubber pin guides, a rubber pin is placed in a position in each rubber pin retaining rod where it rests on the respective plug portions, such that the rubber plug can be placed in a predetermined position on each rubber plug retaining rod. Thus, the placement of a rubber pin can be carried out with a simple structure and without the use of a delicate unit, in such a way that the cost of the whole body of the apparatus can be reduced. Also, since a placement step of a rubber pin can be omitted, productivity can be further improved due to this omission. BRIEF DESCRIPTION OF THE APPENDIX DRAWINGS The aforementioned objects and additional objects as well as novel features of the present invention will be more fully observable from the following detailed description in combination with the accompanying drawings, wherein:
Figure 1 is a schematic configuration view illustrating a rubber pin placement apparatus in accordance with a conventional example; Figure 2 is a schematic configuration view illustrating the rubber pin placement apparatus according to the conventional example; Figure 3 is a schematic configuration view illustrating the rubber pin placement apparatus according to the conventional example; Figure 4 (A) is a side view illustrating a rubber pin placement apparatus in accordance with an embodiment with a partial section; Figure 4 (B) is an enlarged cross-sectional view of a main portion of the rubber pin placement apparatus;
Figure 5 is a plan view of a main portion illustrating a state in which a pair of rubber pin guides employed in the rubber pin placement apparatus have been opened; Figure 6 is a front view of a main portion illustrating a state in which the pair of rubber plug guides have been closed; Figure 7 is a plan view of a main portion illustrating a state in which the pair of rubber plug guides have been closed; and Figure 8 is a front view of a main portion illustrating a state in which the two rubber plug guides have been closed. DETAILED DESCRIPTION OF THE PREFERRED MODALITIES The preferred embodiments of the present invention will be presented in detail below with reference to the appended drawings. Similar members are designated by similar reference numbers. Figure 4 (A) is a side view of a rubber pin placement apparatus in accordance with one embodiment of the present invention, Figure 4 (B) is an enlarged cross-sectional view of a main portion of the positioning apparatus of rubber pins, Fig. 5 is a plan view of a main portion of a pair of rubber pin guides used in the rubber pin placement apparatus that have been opened, Fig. 6 is a front view of a main portion of the pair of rubber plug guides that have been opened, figure 7 is a plan view of a main portion of the pair of rubber plug guides that have been closed, and figure 8 is a front view of a main portion of the two rubber plug guides that have been closed. As illustrated in Figure 4 (A), a rubber pin placement apparatus with a rotating unit 10 is provided, and includes a rubber pin feed unit 11 and a rubber pin fastener 12 respectively placed at intervals 90 ° around a center of rotation of the rotary unit 10 and in opposite positions relative to the outer periphery of the rotary unit 10. The rotary unit 10 has rubber pin retaining rods 10 (a) which are respectively placed at 90 ° rotation intervals, and the respective rubber pin holding rods 10 (a) are formed such that they can be rotated integrally. The rotating unit 10 has a driving motor 13, and the rotation of the driving motor 13 is transmitted to the rubber pin holding rods 10 (a) through a band 13 (a) and the like. The rubber pin feed unit 11 has a straight feed feeder 14 and the straight feed feeder 14 is equipped with a rubber pin housing passage where several rubber pins 15 are aligned and placed. A distal end of the passage 14 (a) of rubber plug housing is open to a supply hole of rubber pins 16 (a) of a rubber plug feed body 16, and the front rubber plug 15 of the rubber pins 15 in the rubber plug housing passage 14 (a) is placed in the rubber pin feed hole 16 (a). The rubber plug feeding body 16 is equipped with a push rod 17 that can be moved up and down, and the push rod 17 is positioned such that it is below the rubber plug feed hole 16 (a) when it is placed in its lowest position. When the push rod 17 is displaced upwards, the rubber plug 15 in the rubber plug feed hole 16 (a) is pushed towards one side of the rubber pin retaining rod 10 (a) of the unit rotating 10. itself, two rubber pin guides 18, 19 are provided in the rubber pin feed body 16, and the two rubber pin guides 18, 19 are displaced open / closed between a open position and a closed position by parallel cylinders (pulse source) 20. As illustrated in figures 5 and 6, when the two rubber pin guides 18, 19 are opened, respective opposite faces of the two clamping rods of rubber pins 10 (a) are positioned so that they are spaced apart from each other, and consequently the rubber pin retaining rods 10 (a) are positioned in positions in which they do not interfere with the rotational movement of each rod of the rubber. of rubber pins 10 (a). Also, as shown in FIGS. 4 (A), 4 (B), 7 and 8, the respective opposite faces of rubber plug guides 18, 19 are positioned in such a way that they rest against each other, when both Rubber plug guides are closed. Slots of semicircular guides 18 (a), 19 (b) are provided on the respective opposite faces of the two rubber pin guides 18, 19, and a cylindrical space is formed by the pair of guide slots 18 (a), 19 (a), when the rubber plug guides 18, 19 are closed. The diameter of the guide space is set to be equal to or slightly greater than the maximum outer diameter of the rubber plug 15. A distal end of each rubber pin retaining rod 10 (a) is placed in the guide space and a lower face of the guide space is opened towards the rubber pin feed hole 16 (a). Likewise, retainer portions 18 (b), 19 (b) which protrude above the respective guide grooves 18 (a), 19 (a) are integrally formed in upper end portions of the two rubber plug guides 18, 19 and an upward movement of the rubber plug 15 is limited by the respective retainer portions 18 (b), 19 (b) when the two rubber plug guides 18, 19 are in the closed position. Semicircular grooves 18 (c), 19 (c), through which the rubber pin retaining rod 10 (a) passes, are respectively provided in the retainer ratios 18 (b), 19 (b). The rubber pin holder 12 is structured such that it can pull the rubber pin 15 of the rubber pin retaining rod 10 (a) and place the rubber pin 15 that has been pulled into an end portion of the rubber pin. of a wire W. In contrast to the conventional example, the wire laying operation W is carried out without peeling an outer cover at the end portion Wa. Next, the operation of the structure will be explained. When the two rubber plug guides 18, 19 are placed in the closed position illustrated in Figures 5, 6 and one of the rubber plug retaining rods 10 (a) of the rotating unit 10 is positioned to face the the rubber pin feed unit 11 in accordance with its rotational movement, the two rubber pin guides 18, 19 are moved towards the closed position illustrated in figures 7, 8. The guide space is formed by means of the respective guide grooves 18 (a), 19 (a) of the two rubber pin guides 18, 19. Next, the push rod 17 placed in the lower position is displaced upwards such that the rubber pin 15 in the supply hole of rubber pins 16 (a) is moved upwards in the guide space. Here, the rubber pin 15 is displaced while the outer periphery thereof is guided by the respective guide grooves 18 (a), 19 (a). In the course of this movement, the rubber pin retaining rod 10 (a) is inserted into a through hole for wire 15 (a) of the rubber pin 15. Afterwards, the insertion of the pin retaining rod of rubber 10 (a) in the rubber plug 15 is limited or stopped in a position in which an upper end face of the rubber plug 15 abuts the retainer portions 18 (b), 19 (b). Next, the push rod 17 which has pushed the rubber pin 15 is pulled down towards the lower position and the two rubber pin guides 18, 19 are moved towards the open position illustrated in figures 5, 6. Thereafter, the rotating unit is rotated 90 ° clockwise and the rubber pin retaining rod 10 (a) which holds the rubber plug 15 installed there is stopped at the position of the pin retainer of the pin. rubber 12. The rubber pin holder 12 pulls the rubber plug 15 from the rubber pin retaining rod 10 (a), and the rubber plug 15 that has been removed is placed in the end portion Wa of the wire W. Such processing actions are carried out on restraining rods 10 (a) of respective rubber pegs in such a manner that the rubber pegs 15 are automatically sequentially placed in end portions Wa of the W wires. An outer cover of the end portion Wa of the wire W is peeled after the placement of the rubber pin 15. In the course of the above operation, as illustrated in Fig. 4 (b), the rubber plug 15 is positioned on the rubber plug retaining rod 10 (a) while an outer periphery of the rubber plug 15 is guided by the respective guide grooves 18 (a), 19 (a) of the two pin guides of Accordingly, when the internal diameter of the rubber plug 15 is small, the diameters of the respective guide grooves 18 (a), 19 (a) can simply be reduced, so that there is no where the stiffness is weak in the respective rubber plug guides 18, 19, and the rubber plug 15 can be made without damaging parts or the like, which results in an improvement in durability. In this way, since such a problem as for example damage to a part does not occur, and since the feeding of the rubber plug 15 is carried out in a safe manner, a stoppage of the machine due to power failure is avoided, as such way you can improve productivity. Also, since the placement of one of the rubber pins 15 on each of the rubber pin retaining rods 10 (a) is limited by the respective retainer portions 18 (b), 18 (b) provided above. of the upper portions of the respective guide grooves 18 (a), 19 (a), the rubber pin 15 is placed on the rubber pin retaining rods in a position in which it rests on the retainer portions 18 (b), 19 (b) in such a manner that the rubber plug 15 can be securely positioned and positioned in a predetermined positioning position of each rubber pin holding rod 10 (a). Accordingly, unlike the conventional example, it is not necessary to provide another positioning unit in addition to the rubber pin feeding unit 11, the structure of the rubber pin placement apparatus is simplified, and the manufacturing cost is reduced. Further, since the rubber pin 15 is placed and mounted in the predetermined positioning position of each rubber pin holding rod 10 (a), a secure supply of the rubber pin 15 to the fastener can be carried out. of rubber plug 12 in the next stage. As a result, stopping the machine due to a power failure is prevented, which also results in an improvement in productivity. Also, since the placement step of the rubber plug 15 can be omitted, an improvement in productivity is also obtained as a result. Furthermore, in accordance with the above, since the lower face positions of the respective detent portions 18 (b), 19 (b) define a position of the lower end face of the rubber plug 15 placed on each rod of rubber plug 10 (a), a positioning position of the rubber plug 15 on the rubber plug retaining rod 10 (a) can be adjusted arbitrarily by the position of the respective retainer portions 18 ( b), 19 (b). All the contents of Japanese patent application P10-355093 (filed on December 14, 1998) is incorporated herein by reference. Even though the invention has been described above with reference to certain embodiments thereof, the invention is not limited to the embodiments described above. Those skilled in the art will be able to devise modifications and variations to the modalities described above based on the teachings set forth above. The scope of the present invention is defined with reference to the following claims.