JPS6037589B2 - How to attach the terminal cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching a terminal cover, and is aimed at simplifying the number of steps required for attaching a terminal cover when covering a terminal fixed to the end of a cord with an insulating material. Regarding provision.

Conventionally, methods for attaching terminal covers for the purpose of insulation include, firstly, a method using a terminal cover dip-molded from synthetic resin, and secondly, a method using a terminal cover injection-molded synthetic resin. In the first method, before crimping the terminal to the end of the cord, a terminal cover is first placed on the end of the cord, and then, after the terminal is crimped to the end of the cord, the terminal cover is pulled back toward the end of the cord. , the outer iron was attached to the terminal, which required a lot of man-hours and was complicated.

Also, if you make a mistake in the above procedure and crimp the terminal cover to the end of the cord first, the terminal cover is shaped so that it is impossible to pass the terminal through and attach it to the end of the cord, so it may be impossible or extremely difficult to attach the terminal cover. Ta. Furthermore, the second method has various problems, such as the high cost per contact and the need for a separate tube to protect the end face of the cord.

The present invention has been devised in view of the conventional problems, and its characteristics are that cords with terminals fixed to the ends of the cords are arranged side by side on a conveying member and conveyed sequentially. , the terminal is held by a support section that moves in parallel with the conveyance, and during the conveyance process, the terminal is covered with an insulating thermoplastic resin material along with the end of the cord, and the cord is pulled in a direction away from the support section. In this state, the resin material is pressed with a heated pressing member to be plastically deformed and attached to the terminal and the end of the cord to which the terminal is fixed in a covering manner.

Hereinafter, embodiments of the present invention will first be described with reference to FIGS. 1 to 6. A cord 1 is composed of a conductive core wire and an insulating covering material 2 such as vinyl resin that covers the core wire, and is exposed at one end of the cord 1. A terminal 3 is crimped in advance to the core wire.

In the illustrated example, the terminal 3 is a faston terminal, and is composed of a base 5 having a cylindrical portion 4 for attaching to the core wire at one end, and circular arc portions 6, 6 protruding from both left and right sides of the base 5. . The cords are arranged in parallel and at equal intervals on the conveying member 7,
They are sequentially conveyed in one of the directions in which they are arranged in parallel.

The conveying member 7 includes a plurality of conveying blocks 8 arranged in a row in the horizontal conveying direction, each of which holds a cord in the insertion/extraction position, and a lower part of the conveying block 8 that receives an inner iron so as to be movable, thereby allowing movement of the conveying block 8. a forward/return guide groove 9 that guides the
10, a forward cylinder 11 that presses and moves the conveyor block 8 in the forward guide groove 10 from the starting end to the terminal end of the forward groove 8 in an intermittent movement for each intermediate dimension in the moving direction of the conveyor block 8, and a forward guide groove. A transfer cylinder 12 that sequentially transfers the transport blocks 8 from the end of the groove 9 to the start end of the double guide groove 10 presses the transport blocks 8 in the double guide groove io from the start end of the groove 10 to the end of the same groove every block dimension. It is mainly composed of a reciprocating cylinder 3 for movement, and a return cylinder 14 for sequentially moving the conveying block 8 from the terminal end of the reciprocating guide groove 10 to the female end of the reciprocating guide groove 9. In the illustrated example, the conveyance block 8 includes a rectangular parallelepiped-shaped lower block 8a in which sheet metal tray-shaped guide grooves 9 and 10 are also extended, and the lower block 8a.
an upper block 8b which is removably fixed to the upper surface of the block a through bolts 15 and whose dimension in the moving direction is approximately one cord diameter shorter than the dimension in the same direction of the lower block 8a; the adjacent lower blocks 8a are movable respectively; The cords are held in the gaps between the adjacent upper blocks 8b in an insertion/extraction position and in a pinched or loose iron manner, and are conveyed by the movement of the conveyance flocks 8.

Further, the forward and backward movement guide grooves 9 and 1 are located vertically relative to each other, the transfer cylinder 2 moves the conveyance block 8 downward from the forward movement guide groove 9 to the backward movement guide groove 10, and the return cylinder 4 Conversely, the transport block 8 is moved upward. As shown in FIG. 3, a sliding bush 16 that is longitudinal in the moving direction is provided near the upper side of the transport block 8 on the forward guide groove 9, and the transport block 8
prevents the surface from rising. Further, a guide village 17 which is longitudinal in the moving direction is provided on the forward movement guide groove 9 on the side of the conveying block 8, and holds the cord on the conveying block 8 at a predetermined height. At a horizontally spaced apart position on the side of the reciprocating guide groove 9, there is a conveyor section village 7.
During the process of conveying the cord, a terminal support member 18 is provided which supports the terminal 3 fixed to the end of the cord along with it.

The support village 18 is provided. The support village 18 is
Second forward and backward movement guide grooves 19 and 20 are provided parallel to each other at horizontally spaced apart positions of the forward and backward guide groove 9, and longitudinally movable grooves are provided in the second forward and backward movement guide grooves 19 and 20. A support block 21 that can freely support the terminal 3 is provided with a large number of inner irons, and a support block 21 that connects both ends of the second forward and backward movement guide grooves 19 and 20 and connects them from one guide groove to the other guide groove. The transfer/ring guide grooves 22 and 23 that slidably guide the cylinders, and the support block 21 in the second forward guide groove 19 are moved in synchronization with the forward cylinder 11 from the starting end of the groove 19 to the final direction. The second forward cylinder 24 is pressed and moved, and the support block 2 is moved sequentially from the end of the second forward guide 19 to the start end of the second backward guide groove 20.
a second transfer cylinder 26 that magnetically attracts and moves the 1 through a magnet 25; and a support block 21 in the second re-laying guide groove 20
A second reciprocating cylinder 27 that presses and moves the second reciprocating guide groove 20 from the female end of the same groove 20 toward the terminal end by one block dimension, and supports the second reciprocating guide groove 20 sequentially from the terminal end to the starting end of the second reciprocating guide groove 19. Second ring cylinder 2 that moves the flocs 21 by ring
In the illustrated example, the support block 21 has a base 21a in the shape of a rectangular parallelepiped in which the inside of the guide groove turtle 9, 20' is made of sheet metal and shaped like a toilet. An insulating plate 2 such as Bakelite with a support 21b sandwiched between the upper and lower surfaces.
9 and 29 are fastened together with bolts 30, and the three bolts are embedded in an insulating cylindrical body 31.

The terminal 3 at the end of the cord 1 on the conveying member 7 is attached to the support body 21b.
A locking protrusion 21c is formed which protrudes in the direction and is removably inscribed in the closed end portion of the terminal 3. The locking protrusion 21c has an inverted T-shape in cross section, and its lower ends are held between the left and right circular arc portions 6, 6 of the terminal 3 and the base portion 5 by iron. Thus, the transport block 8 on the forward guide groove 9 and the second forward guide groove 19
The upper support block 21 moves intermittently in parallel in the same direction every block dimension by interlocking with each cylinder, and sequentially circulates.

In this case, the gap between the adjacent upper blocks 8b and the locking protrusion 2
1c, the terminals 3 fixed to the ends of the cords are supported by the locking protrusions 21c, and the cords are supported between the conveying blocks 8 in a sandwiched or floating manner. The cord is sequentially translated in parallel from the female end of the conveyance member 7 to the terminal end in cooperation with the support member 16 (arrow A in FIG. 1). The first step (especially the fourth,
Each b shown in Fig. 5) covers the terminal 3 together with the end of the cord 1 with an insulating thermoplastic resin material 32, 32, and the resin material 3
Reference numerals 1 and 32 are long film strips that cover the terminal 3 in a superimposed manner from above and below, and are guided to the upper and lower surfaces of the terminal 3 and the like by upper and lower guide rollers 33 and 33.

Next, in the second conveyance process (particularly shown in each c in FIGS. 4 and 5), the cord 1 that has reached the top of the pressing base 34 is transferred to the chuck mechanism 3.
At the same time, the chuck mechanism 35 is moved in a direction away from the locking protrusion 21c by the horizontal movement cylinder 36 to pull the cord and give linearity to the cord.

Then, after that, the pressing member 3 formed into a portal shape and heated
7 moves up and down freely and presses the above-mentioned upper and lower polymerized resin materials 32, 32 across the terminal 3 and the cord.
4 to plastically deform the upper resin material 32 into a shape along the ends of the terminal 3 and the cord 1, and the upper and lower resin materials 32
, 32 to each other, thereby making the resin materials 32, 32,
The terminal 3 is attached to the end of the fixed cord in a covering manner. Then, the subsequent movement of the terminals 3 and the like by the conveyance member 7 and the support member 18 forces the resin materials 32, 32 to move together. In the above case, as shown in FIGS. 1 and 6, the chuck mechanism 35 includes a pair of clamping sections 38, 38 that clamps the cord from left and right sides, and a drive section 39 (which allows these clamping sections 38, 38 to be freely expanded vertically). (not described in detail), and the chuck mechanism 35 is configured with a movable table 40 together with the horizontal movement cylinder 36.
be placed on top. The movable table 40 can be raised and lowered by an elevating cylinder 41, and when the code 1 is moved by the conveyance member 7, the movable table 40 is lowered to avoid interference between the cord 1 and the warriors 38, 38, and the cord 1 is moved intermittently. Each time the movable table 40 is completed, the movable base 40 is raised, and the warriors 38, 38 pull the cord 1 by arming it, giving the cord linearity. In addition, a high frequency or ultra-high wave heating device is adopted as the heating means for the pressing member 37, and the resin materials 32, 3 of the pressing member 37 are placed on the upper surface of the pressing base 34 to prevent sparks due to contact with the pressing member 37.
An insulating member 34a is embedded in the pressing portion via 2. In the third step of conveyance, after the terminal 3 and the cord end welded and covered with the resin materials 32, 32 reach the cutting base 42,
These terminals 3 and the resin material 32 welded on both sides of the cord 1 end
A pair of cutting blades 43, 43 that cut the resin materials 32, 32, respectively, are lowered in a vertically movable manner, and the cutting blades 43, 43 cut the mutually welded portions of the resin materials 32, 32 on both sides of the terminal 3 and the end of the cord 1, respectively. The resin materials 32, 32 are cut all over, and the installation of the terminal cover is completed.

Note that the second and third steps may be integrated, and welding and cutting may be performed simultaneously. The fourth process of conveyance is the end of conveyance, and the second
When the transfer cylinder 26 reaches the end of the second forward guide groove 19, the support block 21 is magnetically attracted and moved along the transfer guide groove 22 in the direction of the second return guide groove 20, and the locking protrusion 21c is removed from the terminal 3. urge

In this case, in order to prevent the terminal 3 and its cord from accompanying the separation movement of the locking projection 21c, the locking projection 21c
Prior to the movement of the terminal 3 in the direction of the second return guide groove 20, a regulating member 45 is provided which detachably abuts on the surface of the terminal 3 in the same direction via a cylinder 44. Then, the terminal 3 integrally covered with the resin materials 32 and the cord 1 to which the terminal 3 is fixed are taken out from the conveying member 7 as a product, and the resin material 32
, 32 are removed. FIG. 7 shows a terminal cover mounted according to another embodiment of the present invention, in which a pair of resin materials 32, 32 covering the terminal 3 are symmetrical with approximately the same shape and the same size, and both resin materials 32 , 32 are located approximately at the center of the terminal 3 in the vertical direction.

This is because the lower resin material 3 is placed on the upper surface of the pressing base 34 in the embodiment
This can be achieved by, for example, forming a fitting hole into which the terminal 3 is inserted together with the terminal 2. FIG. 8 shows a terminal cover mounted according to still another embodiment of the present invention, in which the raw resin material 32 before being attached to the terminal 3 is formed into a cylinder that can be inserted into the terminal 3 with iron, and during the transportation process. The cylindrical body and the cord 1 end are attached to the terminal 3 which is fixed in advance to the cord 1 end, and the cylindrical body is pressed by the pressing member 37 to be plastically deformed and the cord 1 end is fixed to the terminal 3. It is attached in a covered manner.

Note that although the above is based on the example shown, the terminal 3 is a SurePlug (
It is also possible to attach terminal covers to other types of connectors, such as bullet-shaped (bullet-shaped) connectors and flag-shaped connectors.

Furthermore, if the length of the resin material 32 welded to the end of the cord to which the terminal 3 is fixed is made longer, it can also function as a protective tube for the end of the cord. Further, when the resin material 32 is welded, by welding the resin material 32 and the cord coating material 2, the resin material 32 is firmly fixed to the terminal 3, and airtightness to the terminal 3 is maintained. or,. The conveyance member 7 and the support member 18 may be conveyed continuously or intermittently by a belt conveyor, chain conveyor, etc., and each cylinder may be hydraulically or pneumatically actuated, or an electric screw jack may be used. be. Further, the resin material 32 covering the terminal 3 may be plastically deformed so that it can be freely attached to the terminal in the axial direction of the cord so as to be detachable from the terminal. According to the present invention, since the terminal cover can be attached directly to the terminal 3 at the end of the cord, unlike the conventional method, first the terminal is attached to the end of the cord, and then the terminal is crimped to the end of the cord. Compared to the complicated process of attaching the outer iron to the terminal by pulling back the terminal cover toward the end of the cord, the process is dramatically simplified, and the present invention can be installed alongside a fully automatic terminal punching machine. Therefore, it is particularly useful, and combined with the simple structure as a whole, it can produce various excellent effects.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and FIG. 1 is an overall plan view thereof;
2 is a front view taken along the Roro line in FIG. FIG. 4 is a front view, FIG. 6 is a front view taken along the line shown in FIG. . 1... Cord, 3... Terminal, 7... Conveying member, 18... Supporting member, 32... Resin material, 34
...pressing base, 37...pressing member, 42...cutting base, 43...cutting blade. Figure 2 Figure 3 Figure 6 Figure 7 Figure 8 Figure 1 Figure 4 Figure 5

Claims (1)

[Claims] 1 Cords with terminals fixed to the cord ends in advance are arranged side by side on a conveying member and conveyed sequentially, and the terminals are held by a support member that moves in parallel with the conveyance, and during the conveyance process, the terminals are attached to the cord ends together with the cord ends. The cord is covered with an insulating thermoplastic resin material, and the cord is pulled in a direction away from the support member to form a straight line. In this state, the resin material is pressed with a heated pressing member to plastically deform it and form a terminal. A method for attaching a terminal cover, characterized in that the terminal is attached to the end of a fixed cord in a covering manner.