JP2596120Y2 - Rubber mold terminal fixing part - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for fixing a rubber mold terminal, and more particularly to a fixing portion for a rubber mold terminal of a cable fitted to a bushing provided in an electric device.

[Related Art] Hereinafter, an example in which a rubber molded cable terminal is inserted and connected to an epoxy bushing of a conventional power distribution device or the like will be described with reference to the drawings. FIG. 6 is a side view showing a cross section of a part showing the connected state, and FIG. 7 is a side view showing the state before the connection. That is, the projection 2 having a tapered surface on the right side is formed on the base end side of the epoxy bushing 1 on the electric device side. On the other hand, the rubber-molded terminal 3 on the cable side to be fitted and connected thereto has a hole 3a of the same shape and length as the above-mentioned epoxy bushing 1 on the inner peripheral surface, and the tip of the above-mentioned epoxy bushing 1 has a projection. A groove 3b having the same shape for engaging with the second groove 2 is formed. Therefore, if the rubber mold terminal 3 is inserted and fitted from the right side as shown by the arrow, the protrusion 2 is fitted in the groove 3b in a state where it is prevented from coming off as shown in FIG. Further, the tightening band 5 is tightened from the outer periphery of the groove 3b with a screwdriver or the like to prevent the band from coming off.

[Problem to be Solved by the Invention] However, such a structure in which the tightening band is tightened to prevent the tightening band requires a tool such as a driver for tightening the tightening band. In addition, in the current distribution equipment, in addition to the work space being narrow due to compactness, the conventional structure described above has a problem that the tightening work of the tightening band is more difficult to perform and the workability is poor. there were. In addition, since the fastening band and the rubber mold terminal of the cable are not integrated, there is also a problem that the fastening band is easily lost or forgotten to be closed.

This invention was made in view of such a point,
It is an object of the present invention to provide a cable terminal fixing portion which can solve the drawbacks of the conventional technology and can prevent the cable terminal itself from falling off by an easy operation.

[Means for Solving the Problems] The present invention aims to electrically connect a cable and a device by inserting a rubber mold terminal on a cable side into a bushing of a power distribution device or the like, and to connect the bushing to the outside of the bushing. In the combination of the rubber mold terminal and the bushing, which are designed to prevent the protrusion by having the protrusion and the groove having the tapered side surface inside the rubber mold terminal fit together, the terminal fixing ring is provided outside the rubber mold terminal. The rubber-molded terminal is fitted so that it can move along the axial direction, and a distal-side linear portion is provided on the inner peripheral surface on the distal side of the terminal-fixing ring, while the rubber-molded terminal has its own internal part. A tip-side linear portion is provided on the outer peripheral surface on the tip side from the groove position, and when the terminal fixing ring moves to the tip side, its own tip-side linear portion becomes the rubber mold. The terminal-end-side linear portion is pressed down, and a protrusion for preventing displacement is provided on the outside of the rubber mold terminal at a position closer to the base end than the linear portion on the tip side, and furthermore, more than the protrusion for preventing displacement. A locking projection is formed at an end position, and inside the terminal fixing ring, when the fixing ring moves to the tip end side of the rubber mold terminal, the shift preventing projection and the locking projection are formed. It is a fixing portion of a rubber mold terminal, wherein a groove for locking both sides is formed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
FIGS. 1 and 2 are cross-sectional views showing only the upper half of the configuration of the rubber mold connection portion of the first embodiment. That is, for example, the epoxy bushing 8 provided on the left electric device has a slightly smaller diameter at the right end and a projection 9 with a tapered right side at the base end. On the other hand, the rubber mold terminal 6 fitted with this has a hole of the same shape and the same size as the epoxy bushing 8 formed on the inner surface, and a groove 7 with a side taper is formed at a position corresponding to the projection 9. Have been. In addition, the outer circumference is the straight section 1
5, a projection 16 for preventing slippage provided on the outer periphery of the groove 7, a linear portion 14 on the ring side, a locking projection 12 having a tapered surface on the left side, an inclined portion 17 having a slightly larger outer diameter than the linear portion, and a large diameter. And the drop-off prevention protrusion 11 provided on the straight portion is formed in a continuous shape. A groove 18 is formed on the outer periphery between the protrusion 11 and the deviation preventing protrusion 16 so as to engage the protrusion 12 on the inner periphery.
Terminal fixing ring having a protrusion 13 on the right side of the groove 18
10 are configured so as to be freely movable left and right.

Therefore, the rubber molded terminal 6 of the cable is inserted into the epoxy bushing 8 of the electric device, and the fixing ring 10 is slid to the left from the state shown in FIG. 1 to the state shown in FIG. When the right end protrusion 13 of the groove 18 on the inner surface is moved to a position where it abuts, the straight portion 15 formed on the tip end of the rubber mold terminal 6 is firmly tightened from the outer periphery with the straight portion 14 formed horizontally at the tip of the fixing ring 10. As a result, the rubber mold terminal 6 is securely prevented from coming off because it comes into close contact with the epoxy bushing 8. At this time, the deviation preventing projection 16 prevents the fixing ring 10 from shifting to the right. Also, when the fixing ring 10 is moved to the right side shown in FIG. 1, the right end of the fixing ring 10 contacts the projection 11 and goes further to the right side to prevent the fixing ring 10 from dropping off.

Next, a second embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals,
Detailed description is omitted. That is, the outer periphery of the rubber mold end 6a provided on the cable end is, in the same manner as in the first embodiment, sequentially arranged from the left side on the tip side linear portion 15a, the protrusion 16a provided on the outer periphery of the groove 7a, and a ring 16a for preventing displacement. Side straight section 14
a, a rectangular locking projection 12a, a small-diameter linear portion, an inclined portion 17a, and a large-diameter linear portion are formed in a continuous shape. The terminal fixing ring 10a fitted thereon is engaged with the ring-side linear portion 14a, the projection 12a having the same width as the distal end linear portion 15a of the rubber molded terminal 6a on the inner peripheral surface to fix the fixing ring 10a. The groove 18a formed so as to be able to move to the left and right, the inclined surface engaging with the inclined portion 17a and the right straight portion 19 are formed in a continuous shape, and the outer peripheral surface is a cylindrical ring formed in a straight line. .

Therefore, in the case of this example, in the state shown in FIG. 3 in which the fixing ring 10a is moved to the right, the locking projection 12a abuts on the left end of the groove 18a, and the fixing ring 10a is prevented from falling off. As shown in FIG. 1, there is no need to particularly provide the protrusion 11 on the outer periphery of the rubber mold terminal 6a. Also,
In the state of being moved to the left, the tip straight portion 14a of the fixing ring 10a firmly tightens the tip straight portion 15a of the rubber mold end 6a from the outer periphery and closely adheres to the epoxy bushing 8, so that the slip is prevented.

Next, a third embodiment of the present invention will be described with reference to FIG. In the case of this example, the outer periphery of the rubber mold terminal 6b is a projection provided on the outer periphery of the tip straight portion 15b and the groove 7b in order from the left side.
16b, ring side straight part 14b, left side tapered projection
12b, a groove 22 that engages with the projection 20 provided on the inner surface of the fixing ring 10b, and a ring-side large-diameter linear portion 21.
On the other hand, the inner peripheral surface of the fixing ring 10b fitted to the outer periphery has a tip side linear portion 14b having the same width as the tip linear portion 15b of the rubber mold terminal 6b, a groove 18b engaging with the projection 12b, a rectangular shape. Are formed sequentially and continuously, and the outer periphery is an annular ring having a straight line with the same diameter. Therefore, when the fixing ring 10b is moved to the left from the state where the illustrated fixing ring 10b is prevented from dropping in which the protrusion 20 of the inner peripheral surface is in contact with the right end of the groove 22 of the rubber mold terminal 6b, The straight end portion 14b of the fixing ring 10b fastens the epoxy bushing 8 from the outer periphery to prevent the straight end portion 15b of the rubber mold terminal 6b from coming off.

Next, the operation and effect of these embodiments will be described. An important point in the present invention is that a horizontal portion is provided at the tip of the terminal located on the left side of the protrusion 9 provided on the epoxy bushing, that is, the groove 7, 7a, 7b, 7c of the rubber mold terminal. The fixing rings 10, 10a, 10b have straight portions 14, 14a, 14b at the inner peripheral end, and the straight portions 1 at the end of the rubber mold end.
By pressing 5, 15a, 15b from the outer periphery, the end force of the cable terminal itself to the epoxy bushing 8 is improved.

On the other hand, in the example shown in FIG. 5, for example, the outer peripheral surface of the rubber molded terminal 6c has a projection 27,
c, a projection 16c, a ring-side linear portion 22c, a projection 12c having a tapered surface on the left side, a groove 25, an inclined surface 17c, and a large-diameter linear portion forming a projection 11c. On the other hand, the inner peripheral surface of the fixing ring 10c fitted to the outer periphery has, in order from the left side, a convex portion 24 having the same shape and the same width as the distal concave portion 15c of the rubber molded terminal 6c, and a groove engaging with the projection 12c. 18c, a protruding portion 26 having the same shape as the inclined surface 17c on the right side and a straight portion are formed. Therefore, in the fixed state shown in FIG. 5 in which these are fitted and the fixing ring 10c is moved to the left, the distal convex portion 24 of the fixing ring 10c fits into the distal concave portion 15c of the rubber molded terminal 6c, The base end of the epoxy bushing 8 is tightened, but because of the tapered shape, when a force for pulling out the cable to the right is applied, the tapered portion of the fixing ring 10c is pressed by the force of the tip end of the rubber mold terminal 6c to be turned up. 24 will be pushed up, and the cable terminal itself will not be able to obtain sufficient yield strength.

As described above, in the present invention, it is important to provide a horizontal straight portion at the distal end portion of the fixing ring and the rubber mold terminal located on the base end side (left side in the figure) of the projection provided on the epoxy bushing.

[Effects of the Invention] As described above, the fixing portion of the rubber mold terminal of the present invention does not require tools such as a screwdriver, and requires a terminal fixing ring, instead of a tightening operation, as compared with a conventional terminal using a tightening band. Since the attachment / detachment to the bushing is completed just by moving, the workability is greatly improved.

Further, since the terminal fixing ring is slidably attached to the rubber molded terminal to prevent the ring from falling off, there is no fear that the fixing ring is lost.

[Brief description of the drawings]

1 and 2 are cross-sectional views showing only the upper half of the structure of the fixing portion of the rubber mold terminal according to the first embodiment of the present invention, and FIGS. 3 and 4 are second embodiments of the present invention. Example, a sectional view of only the upper half portion showing the third embodiment, FIG. 5 is a sectional view showing another example for explaining the effect of the present invention, and FIGS. FIG. 6 is a side view showing the configuration of the molded terminal, FIG. 6 shows a fitted state, and FIG. 7 shows a state before fitting. 6,6a, 6b, 6c ... Rubber mold end 8 ... Epoxy bushing 9 ... Protrusion 10,10a, 10b, 10c ... Fixing ring 15,15a, 15b ... Linear part (horizontal part) 16,16a, 16b, 16c ... Protrusion (For deviation prevention)

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-57-31317 (JP, A) JP-A-63-164183 (JP, U) JP-A-2-47772 (JP, U) Jiko-sho 62- 5009 (JP, Y2) Jikken 53-16621 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 4/70 H01B 17/22 H01R 4/56 H01R 4/60 H01R 13/639 H02G 15/02 H02G 15/08

Claims (1)

(57) [Scope of request for utility model registration] A cable-molded rubber terminal is inserted into a bushing of a power distribution device or the like to electrically connect the cable and the device, and a protrusion provided outside the bushing and a rubber-molded terminal are provided. In the combination of the rubber mold terminal and the bushing to prevent slipping by fitting with a groove with a side taper that has inside,
A terminal fixing ring is fitted on the outside of the rubber mold terminal so as to be movable along the axial direction of the rubber mold terminal, and a distal side linear portion is provided on the inner peripheral surface on the distal side of the terminal fixing ring. On the other hand, the rubber molded terminal is provided with a distal-side linear portion on the outer peripheral surface on the distal side of the internal groove position of the terminal itself, and the distal-side linear portion of the terminal when the terminal fixing ring moves to the distal side. The rubber molded terminal distal end linear portion is pressed down, and further, the rubber molded terminal is provided with a projection for preventing displacement at a position closer to the base end than the linear portion on the tip side, and also from the projection for preventing displacement. Further, a locking projection is formed at a position on the base end side, and inside the terminal fixing ring, when the terminal fixing ring moves to the distal end side of the rubber mold terminal, the displacement preventing projection and the engaging projection are formed. Stop Fixed part of the rubber mold terminals, characterized in that a groove for locking both the cause.