JPH09163540A - Stress-relief cone inserting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the straightness of a cable and avoid damages on the inner surface of a stress-relief cone when the stress-relief cone is fitted in order to form the joint of the cable such as a CV cable. SOLUTION: A main shaft 1 supported by legs L, two cleats 2 and 3 provided on both the ends of the main shaft 1 and the support table 5 of a stress-relief cone pushing jig 4 which is slid along the main shaft 1 are provided. In order to fit a stress-relief cone S to a cable C, a conductor gripping rod 7 is fixed to the exposed conductor part 6 of the cable C and the lever 9 of a gear box 8 fixed to the rod 7 is operated to move a slider 10 on the direction of a cable axis to push the pushing jig 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for inserting a stress cone into a cable when assembling a CV cable junction box.

[0002]

2. Description of the Related Art CV
When forming a connection part such as a cable, a stress cone is inserted into the cable, but this work is usually performed manually. However, in the manual insertion, as shown in FIG. 8A, the stress cone S comes into contact with the end of the cable C and scratches the inner surface, which makes quality control difficult. Also,
As shown in FIG. 6B, there is a problem that the cable C bends during insertion, cannot maintain linearity, and cannot be inserted smoothly. Further, as shown in JP-A-7-7827, a device for mechanically pushing in a stress cone has been proposed. However, even this device has not suggested a mechanism for improving the linearity of the cable.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and features thereof are a conductor gripping rod fixed to a conductor exposed portion of a cable, a cleat for a cable and a conductor gripping rod. Cleats, spindles connecting both cleats,
It slides along the spindle and supports the stress cone pushing jig, the conductor gripping rod is fixed to the gearbox equipped with a gear and its rotation mechanism, and the gear rotates to slide along the conductor gripping rod. A slider for pressing the pressing jig is provided, and the slider has an engaging portion for engaging the stress cone pressing jig and a rack for meshing with the gear. Here, it is desirable to provide an elevating mechanism on each cleat and the support base so that centering adjustment (centering) of these can be performed.

Further, when the stress cone is inserted into the cable using the above apparatus, it is preferable to insert the protective tube into the stress cone. At that time, the outer diameter of the protective tube shall be equal to the outer diameter of the stress cone insertion part of the cable, and the inner diameter shall be larger than the maximum diameter of the conductor gripping rod and smaller than the outer diameter of the stress cone insertion part of the cable. .

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on specific examples. FIG. 1 is a side view showing a usage state of the device of the present invention,
FIG. 2 is a plan view showing a state in which the pushing jig, the slider and the gear box are removed in the same device. As shown in the figure, the device of the present invention includes two main shafts 1 held by leg portions L, two cleats 2 and 3 provided at both ends thereof, and main shaft 1.
The support base 5 of the stress cone pushing jig 4 that slides along the base is provided. For fitting the stress cone S into the cable C, the conductor gripping bar 7 is fixed to the conductor exposed portion 6 of the cable C, and the lever 9 of the gear box 8 fixed to this is operated to move the slider 10 in the cable axial direction. Then, the pressing jig 4 is pressed to carry out. That is, the two cleats 2 and 3, the cable C held by them, the conductor holding rod 7 and the gear box 8 are fixed, and the slider 10 and the support base 5 slide to insert the stress cone S.

(Spindle and Cleats) The spindle 1 is composed of two metal rods arranged in parallel, and the cleats 2 and 3 are fixed to both ends thereof so as to connect both spindles. One of the two cleats 2 and 3 supports the cable C,
The other 3 supports the conductor gripping bar 7. Each cleat 2, 3
Can rotate the handle 11 to move the shaft 12 up and down to align the gripped cable C and the conductor gripping rod 7.

(Conductor gripping rod) The conductor gripping rod 7 is a metal rod attached to the conductor exposed portion 6 at the end of the cable. The tip of the conductor gripping bar 7 is thicker than the other parts and is configured to be split into two to sandwich the conductor exposed portion 6 and fixed to the conductor exposed portion 6 by tightening a bolt (not shown). . By this fixing, the cable C and the conductor gripping bar 7 are arranged on a straight line. Further, a plurality of holes (not shown) penetrating in the radial direction are formed in the conductor gripping bar 7 at predetermined intervals, and bolts are inserted therethrough so that a gear box 8 described later is axially moved when the stress cone is pressed. Prevent it from slipping. At this time, since the grip bar 7 and the cable C are pulled by the reaction force caused by the pressing of the slider, the linearity of the cable C is maintained.

(Pushing jig) As shown in FIG. 1, the stress cone S is configured such that the outer diameter of the middle portion is large, the outer diameter decreases toward both ends, and the inner diameter is slightly smaller than the outer diameter of the cable. It has a cylindrical shape. This stress cone S
As shown in FIG. 3, the pressing jig 4 for pressing is formed in a cylindrical shape with a wide opening on the front side (the side fitted with the stress cone) and a narrow opening on the other side, corresponding to the outer shape of the stress cone. ing. Then, four circular holes 16 into which the pins 15 provided at the ends of the slider 10 are inserted are formed on the rear surface side. When the stress cone S is pressed, the slider 15 and the pressing jig 4 are integrated by the pin 15, and the stress cone S is pressed as the slider 10 moves.

(Support Base) As shown in FIG. 1, a support base 5 (not shown in FIG. 2) slidably attached to the main shaft 1 supports the pushing jig 4. The support base 5 has a lifting mechanism similar to the cleats 2 and 3, and can be axially aligned with the cable C or the conductor gripping bar 7. When the stress cone S is inserted, it slides along the main axis as the slider moves.

(Slider) As shown in FIG. 4, the slider has two elongated bodies, each having a rack 17 on the upper surface and a rail 18 (see FIG. 5) on the lower surface, arranged in parallel and connected at an end face 19. It has a shape. The both end faces 19 are provided with a substantially semicircular cutout 20, and one end face is provided with four pins 15 projecting.
The slider 10 is installed on the conductor gripping bar, in which case the notch 20 corresponds to the conductor gripping bar 7 and the pin 15 is inserted into the circular hole 16 on the back surface of the pressing jig. Further, the notch 20 is formed in such a size that a protection pipe 25 described later fits into it.
Further, although not shown, between the elongated members of the slider 10, there are provided cylindrical legs which come into contact with the conductor gripping bar 7. This leg corresponds to the outer shape of the conductor gripping bar 7, and is placed on the leg to support the slider itself. In this example, metal pieces having screw holes are attached to both ends 19 of the slider at right angles to face each other, and a bolt is screwed into the screw hole to form an arcuate leg at the tip of the bolt.

(Gear Box) The gear box 8 is fixed to the conductor gripping bar 7, and the gear is rotated by lever operation to drive the slider 10 in the cable axial direction. The sectional structure is shown in FIG. The gearbox 8 is a [mold member 21
A case 22 formed to face each other, a shaft 22 penetrating both mold members 21, a lever 9 connected to the shaft 22, and a gear 23 provided at both ends of the shaft 22. Rotate the gear 23. In addition, a guide 24 corresponding to the rail 18 of the slider 10 is provided inside the lower piece of the mold member 21 so that when the gear box 8 is fitted onto the slider 10, the gear 23
Engage with the rack 17, and the rail 18 is fitted with the guide 24. The gearbox and the conductor gripping rod were fixed with a bolt (not shown). That is, a fixing plate (not shown) having bolt holes is erected on both of the mold members 21, bolts are screwed into the bolt holes, and further penetrate the radial holes of the conductor gripping rods 7 to fix the bolts. Tighten the ends with nuts.

Although simplified in the drawing, the lever 9
A ratchet mechanism is used to connect the shaft 22 and the shaft 22, and the lever 9
The gear 23 (shaft 22) is configured to rotate in a constant direction even when the gear is reciprocated. Further, although the lever 9 is manually operated in this example, the gear 23 may be rotated by a motor or the like.

(Protective Pipe) As shown in FIG. 1, the protective pipe 25 is inserted inside the stress cone S when the stress cone is inserted into the cable to protect the inner surface thereof. The inner diameter of the protective pipe 25 is the maximum diameter of the conductor gripping bar 7 (in this example, the two cracked portions fixed to the exposed conductor portion 6).
Is larger than the outer diameter of the stress cone insertion portion of the cable C (here, the diameter of the cable insulator). The outer diameter of the cable C is substantially equal to the outer diameter of the stress cone insertion portion. Therefore, when the stress cone is pressed, the protection pipe 25 initially follows the stress cone S, but since the protection pipe 25 contacts the end surface of the cable insulator, only the stress cone S slides thereafter.

(Procedure for Inserting Stress Cone and Operation of Device) (1) First, the protection pipe 25 is inserted into the stress cone S in advance. (2) Next, as shown in FIG. 1, the conductor exposed portion 6 of the cable
The conductor gripping rod 7 is fixed to the conductor gripping rod 7, and a protective pipe 25 integral with the stress cone S is fitted onto the conductor gripping rod 7. Subsequently, the pushing jig 4 is also fitted onto the conductor gripping rod 7, and the pushing jig 4 is brought into contact with the stress cone S. (3) One cleat 2 holds the cable C, and the other cleat 3 holds the conductor gripping bar 7. At the same time, the support base 5 is slid to hold the pushing jig 4. (4) At that time, the handles of both cleats 2 and 3 and the support base 5
11 is operated to align the axes of the cable C and the conductor gripping bar 7.

(5) On top of the conductor gripping bar 7, the gear box 8
The slider (10) fitted to the outside is attached. At this time, the notch 20 (see FIG. 4) on the end face of the slider is arranged so as to correspond to the conductor gripping rod 7, and the leg of the slider 10 is placed on the conductor gripping rod. (6) Also, insert the pin 15 on the end surface of the slider into the circular hole 16 of the pressing jig (see FIG. 3). (7) Then, a bolt is inserted into the through hole of the conductor gripping rod 7 to fix the gear box 8 so that the gearbox 8 does not slide in the axial direction of the conductor gripping rod 7. (8) In this state, operate the lever 9 to rotate the gear 23. At this time, the gear box 8 does not move to the cleat 3 side of the conductor gripping rod 7 due to the fixing of the bolt, so that the slider
10 is slid toward the pushing jig.

(9) At that time, as a reaction force, a force pulling toward the cleat 3 side acts on the conductor gripping rod 7, so that the linearity of the cable C is maintained. (10) As the slider 10 slides, the stress cone is pressed by the pressing jig 4, and the support base 5 and the protection pipe 25 follow this. (11) Here, since the inner diameter of the protective pipe 25 is larger than the maximum diameter of the conductor gripping rod and smaller than the cable insulator diameter, the end surface of the protective pipe 25 has an insulator 26 as shown in FIG. 6 (A).
Abut on the cut end face of. And after that, the same figure (B)
As shown in, the protection pipe 25 stops at that position, and only the stress cone S is slid to the cable side.

(12) Further, since the outer diameter of the protective pipe 25 is equal to the insulator diameter, there is no step on the outer peripheral surface from the protective pipe 25 to the insulator 26, and the stress cone S is smoothly transferred to the cable side. . (13) In this way, in the series of steps of inserting the stress cone into the cable, the inner surface of the stress cone is always protected by the protective pipe until it is inserted into the cable, so that it is not damaged.

In the above example, the case where the stress cone is inserted into the cable to which the conductor is not connected has been described, but as shown in FIG. 7, it is also used when the stress cone S is inserted into the epoxy unit 27 after the conductor is connected. You can Here, by bringing the gear box 8 into contact with the cleat 28 of the cable C, the gear box 8 is moved along with the movement of the slider 10.
Was configured so as not to retreat.

[0019]

As described above, according to the device of the present invention, the reaction force when inserting the stress cone is applied to the cable, so that the stress cone can be inserted while maintaining the linearity of the cable. it can. Further, when the stress cone is inserted by the device of the present invention, by inserting a protective pipe into the stress cone, the inner surface of the stress cone can be protected and damage can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a stress cone is inserted by a device of the present invention.

FIG. 2 is a plan view of the device of the present invention.

FIG. 3 is a cross-sectional view showing a connecting portion between a slider and a pressing jig.

FIG. 4 is a perspective view of a slider.

FIG. 5 is a sectional view showing one side of a gear box.

FIG. 6 is a sectional view showing an inserted state of a stress cone,
(A) shows the case where the protective pipe contacts the insulator, and (B) shows the case where only the stress cone is transferred thereafter.

FIG. 7 is an explanatory diagram when inserting a stress cone into an epoxy unit.

FIG. 8 is an explanatory diagram of a problem in the conventional insertion work,
(A) shows the inner surface damage of the stress cone, and (B) shows the cable bending.

[Explanation of symbols]

1 Spindle 2 Cleat 3 Cleat 4 Pushing jig 5 Support stand 6 Conductor exposed part 7 Conductor gripping rod 8 Gear box
9 Lever 10 Slider 11 Handle 12 Axis 15 Pin 16
Round hole 17 Rack 18 Rail 19 End face 20 Notch 21 [Mould member 22
Axis 23 Gear 24 Guide 25 Protective tube 26 Insulator 27 Epoxy unit 28 Cleat C Cable S Stress cone L Leg

Claims (2)

[Claims] 1. A conductor gripping rod fixed to an exposed conductor of a cable, a cleat for a cable and a cleat for a conductor gripping rod, a main shaft connecting both cleats, and a slide along the main shaft to support a pushing tool for a stress cone. A support base, a gear box fixed to the conductor gripping rod and provided with a gear and its rotating mechanism, and a slider that slides along the conductor gripping rod by the rotation of the gear and presses a pushing jig, wherein the slider is stress-free. A stress cone inserting device comprising: an engaging portion that engages with a cone pushing jig; and a rack that engages with a gear. 2. A method of inserting a stress cone into a cable using the device according to claim 1, wherein a protective tube is inserted into the stress cone, wherein the outer diameter of the protective tube is a stress cone insertion in the cable. A stress cone insertion method, wherein the stress cone is equal to the outer diameter of the portion, the inner diameter is larger than the maximum diameter of the conductor gripping rod, and smaller than the outer diameter of the stress cone insertion portion of the cable.