JPS5943620Y2 - Cap attachment device for insulators - Google Patents

Description

[Detailed description of the invention] This invention uses a drawing process to attach and fix a cap for attaching a movable contact blade, etc. to either or both ends of various types of insulators, such as movable insulators for air switches. This invention relates to a cap attachment device.

Conventionally, insulator caps have almost always been bonded to the tips of the insulators using cement, but this so-called cementing attachment has many drawbacks as follows.

In other words, when attaching a cap to an insulator, 1
First, pour an appropriate amount of cement into a cap made of copper-plated iron with an open top end, and before the cement hardens, push the bottom end of the insulator into the cement and adhere it, until the cement has solidified to some extent. Using a jig to maintain the relative position of the insulator and the cap, the insulator and the cap were temporarily cured at approximately 55°C for about 4 hours using a jig, then the jig was removed and the cap was further cured for 48 hours using steam in the same manner. It was attached to the insulator.

However, if such a method is used, it may be necessary to apply varnish to the inner circumferential surface of the cap to prevent the cement from absorbing moisture after drying, expanding its volume, and causing cracks in the cap. In addition, cork is placed on the bottom of the insulator to absorb the shock when the insulator is operated, and a layer of cork is placed on the bottom of the insulator to prevent slipping between the cap and the cement due to rotational force applied to the cap from the outside. It was necessary to form many fine irregularities on the inner surface.

However, cement was difficult to mix, and adhesion required skill, and drying of cement required a lot of time and large equipment as described above.

Moreover, even if the cap is attached to the insulator in this way, the cement repeatedly dries and expands after absorbing moisture, which often causes cracks in the cap and cement, resulting in a defective product. Because the cement could not be removed from the insulators, they could not be reused and had to be discarded.

Furthermore, when cement is used, it corrodes due to electrolytic corrosion, so aluminum cannot be used as the material for the cap.

An object of the present invention is to provide an apparatus for attaching a cap to an insulator, which can easily attach a cap to an insulator by drawing.

An example of means embodying the present invention will be described below with reference to the drawings. In the drawings, 1 and 1 are hydraulic cylinders fixedly supported at both ends of the base 3 on the support legs 2, and are capable of reciprocating movement inside them. When hydraulic pressure is applied to the outside of the piston 4.4, which is sealed in the piston 4.4, both pistons 4.4 move toward the center, and when hydraulic pressure is applied to the inside, both pistons 4.4 can move outward.

Reference numeral 5 designates a switching valve for controlling the hydraulic cylinders 1, 1, and when it is switched to the illustrated position 5a, the oil pressure is applied to the outside of the pistons 4, 4, and when it is switched to the 5b position, the oil pressure is applied to the outside of the piston 4. Furthermore, when the pistons 4 and 4 are switched to the 5C position, the oil pressure remains in either position, and the pistons 4, 4 stop at that position.

In addition, 6a, 6a, 6b, and 6b are the pistons 4 and 6b, respectively.
The hydraulic pipes 7.7 connected to the outside and inside of the hydraulic cylinders 1, 4 are thrust receiving members of the hydraulic cylinders 1,1.

Reference numeral 8.8 denotes a side peripheral molded member fixed to the tips of the piston rods 9, 9, which are movable integrally with the pistons 4, 4, and the inner end thereof is recessed in a planar semicircular arc shape for engagement. When the locking step portions 10, 10 are formed to face each other, semicircular arc-shaped notches 1 and 1 are formed inside the locking step portions 10, 10.
, 11 are formed to face each other, and the lower ends of the molded members 8, 8 are also notched in a quarter-arc shape along the notches 11.11 to form molded notches 12, 12.

Note that the bolt 14 connecting and fixing the piston rods 9, 9 and the side molded members 8, 8 is a guide member fixed on the base 3, and the side molded members are mounted on both sides of the bolt 14. Dovetail-shaped guide parts 15, 15 are provided to guide both sides of the parts 8, 8, and a passage hole 16 for a push-up molding member 21, which will be described later, is provided in the center of the bottom part.

Reference numerals 17 and 17 designate support holes through which movable contact blades B, B for a switch are inserted and supported, which are provided through both the front and rear sides of the passage hole 16.

Reference numeral 18 denotes a lower hydraulic cylinder fixedly installed at the center of the lower surface of the base 3, and a piston rod 20 of a piston 19 sealed therein so as to be reciprocally movable has a push-up molded member 21 at the tip thereof. It is set up.

Reference numeral 22 denotes a switching valve that controls the lower hydraulic cylinder 18, and when it is switched to the illustrated position 22a, the hydraulic pressure is applied to the lower part of the piston 19 to move the piston 19 upward;
When switched to this position, the hydraulic pressure causes the upper part of the piston 19 to move downward.

Reference numeral 23 denotes a support tower vertically installed on the back surface of the base 3, and an air cylinder 24 is fixedly installed on the upper part of the support tower so that the mounting position thereof can be adjusted up and down.

25 is a piston 2 that is moved up and down by an air cylinder 24;
The contact blade regulating member is attached to the outer end of the piston rod 27 of No. 6, and is provided with a support hole 28° 28 on both sides through which the movable contact blades B, B for the switch are inserted. A guide plate 30 in which guide rods 29, 29 protruding upward from the back are fixed to a part of the support tower 23 so as to be vertically adjustable.
It is inserted into the guide hole 31, 31 so that it can be slidably guided.

Note that the air cylinder 24 can be moved up and down by operating the switching valve 32.

Next, when attaching an upper cap C1 integrally equipped with a conductive portion and movable contact blades B, B to a movable insulator I for a switch using the cap attaching device configured as described above; A case in which a lower cap C2 for attaching the lower part of the movable insulator I to a mounting bracket for supporting and fixing the movable insulator I to a movable insulator support base in a switch or the like will be explained in sequence.

1. First, to explain the case of attaching the upper cap C1 to the upper part of the movable insulator ■, first, the switching valve 5 is switched to the 5b position and the pistons 4 of the hydraulic cylinders 1, 1 are moved to move the side peripheral molded member 8°. 8 is moved backward, and then the switching valve 5 and the switching valve 5 are returned to the 50 position and maintained at that position.

Next, the movable contact blades B and B are connected to the support hole 17 of the guide member 14.
, 17, and place the upper cap C1 upside down on the guide member 14.

Then, the upper cap C1 is abutted and supported on the guide member 14 at the conductive portion, and the cap portion opens upward, and the lid portion facing the cap portion follows the upward movement trajectory of the push-up molding member 21. corresponds to

Note that the upper cap C1 is placed on the guide member 14 by manual means or other appropriate means.

In this way, after the upper cap C1 is placed on the guide member 14, a rubber buffer member (not shown) having almost the same shape as the upper cap C1 is inserted, and then the movable insulator ■ The constriction part P1 and the constriction part Q1 directly below it
Insert the movable insulator 2 into the cap C1 so that it is accommodated in the upper cap C1.

Note that the state of insertion of the upper part of the movable insulator into the upper cap C1 is the same as the state of insertion of the lower part of the movable insulator into the lower cap C2 (shown in FIG. 4), which will be described later. The inserted state is maintained by appropriate means such as manual operation.

In this way, after placing the upper cap C1 and the movable insulator (2) at the predetermined positions, the switching valve 5 is switched to the 5a position, and the pistons 4, 4 are moved so that both inner ends of the side molded members 8, 8 are in contact with each other. move inward.

Then, the notches 11°11 of the side peripheral molded members 8, 8 enter the constriction Q1 of the insulator I, and the upper cap C
The open end of 1 corresponds directly below the molded notches 12, 12.

Therefore, the switching valve 22 is switched to the 22a position and the piston 1
9 is moved upward, the push-up molding member 21 is pushed up into the support hole 17.
．． Push up the upper cap C1 through the conductive part so that the lower parts of the movable contact blades B and H come out from the contact blades 17, and while squeezing the open end periphery of the cap C1 along the shape of the molded notches 12 and 12. It is inserted into the constriction Q1 of the movable insulator I, and the cap portion of the upper cap C1 is molded into the shape shown in FIG. 3 in the same manner as the cap portion of the lower cap C2, which will be described later.

In this way, after the attachment process of the upper cap C1 to the upper part of the movable insulator ■ is completed, if the switching valves 5 and 22 are switched to the 5b and 22b positions, respectively, the side peripheral molded members 8, 8 are separated from the upper cap C1. At the same time, the push-up molding member 21 descends to move the upper cap C1 downward.

Then, the conductive part of the upper cap C1 is connected to the guide member 14.
The lower movement stops at the position where the lower portions 1 of the movable contact blades B, B are inserted into the support holes 17.17, and in this state they are removed from the cap attachment device.

Next, to explain the case of attaching the lower cap C2 to the lower part of the movable insulator ■, the switching valve 5 is switched to the 5b position in the same way as the above-mentioned operation, and then returned to the 5c position. is held in the retracted position, and then the lower cap C2 is placed on the guide member 14 so that the lid portion of the cap portion corresponds to the upward trajectory of the push-up molding member 21 and the cap portion opens upward. Place it.

Note that a rubber cushioning member (not shown) is inserted into the lower cap in the same manner as in the above-mentioned operation.

Thereafter, as shown in FIG. 4, the movable contact blade B is moved so that the bulge P2 at the lower part of the movable insulator and the constriction Q2 immediately above it are accommodated in the lower cap C2.

Movable insulator attached with upper cap C1 equipped with B■
into the cap C2.

At this time, in order to accurately hold the movable insulator I to which the upper cap C1, which is integrally equipped with movable contact blades B and B, is attached, against the lower cap, the air cylinder 24 is opened by operating the switching valve 32. The movable contact blades B, B are previously inserted into the support holes 28° 28 of the contact blade restriction member 25 by moving the contact blade restriction member 25 up and down through the contact blade restriction member 25.

However, in order to prevent the conductive part from hitting the contact blade regulating member 25 when the lower cap C2 is pushed up with the upward movement of the push-up molding member 21, the position of the regulating member 25 is set so that the conductive member 25 is not in contact with the contact blade regulating member 25 as shown in FIG. Set it as high as necessary above the area.

After placing the lower cap C2 and the movable insulator (2) at the predetermined positions, the switching valve 5 is switched to the 5a position in the same manner as described above, and the pistons 4, 4 are moved inward, as shown in FIG. , the notch 11°11 is the constriction Q of the insulator ■
2, the open end of the lower cap C2 corresponds directly below the molded notches 12, 12, and the folds of the movable insulator 2 engage with the locking steps 10, 10 of the side molded members 8, 8. will be stopped.

Thereafter, when the switching valve 22 is switched to the 22a position, the push-up molding member 21 moves upward in the same manner as described above, and forms the lower cap C2 in the shape shown in FIG. is bitten into the constriction Q2 of the movable insulator (1), thereby completing the installation process of the lower cap C2.

After that, attach the cap C1 to both the upper and lower parts from the cap attachment device.
, C2 to which the movable insulator ■ is attached, operate the switching valves 5 and 22 in the same manner as described above, and also operate the switching valve 3.
The movable contact blades B, B may be extracted from the contact blade regulating member 25 by operating the air cylinder 24 via the contact blade 2.

In addition, when the lower cap C2 is pushed up by the upward movement of the push-up molding member 21, the movable contact blades B, B inserted into the support holes 28.28 of the contact blade regulating member 25 are moved to the support holes 28.2.
Move up along 8.

In this way, the present invention has the effect of easily performing the drawing process for attaching a cap to an insulator, and greatly simplifies cap attachment, which was conventionally done by cementing, reducing the number of steps and lowering production costs. I can do it.

As described in detail above, the present invention has a semicircular notch 11 corresponding to the constriction of the insulator, a semicircular notch 11 formed at the bottom along the notch 11, and a cross section of which has a semicircular arc shape, and the shape of the constricted part of the cap. means for holding a pair of molded members 8, 8 each having a molded cutout 12 at the tip thereof in a state facing each other;
and a hydraulic device equipped with a push-up means for pressing the open end of the cap to be fixed to the tip of the insulator against the molding notches 12, 12 and drawing and molding it along the shape of the turn. As a result, it is advantageous for industrial use as a device for attaching a cap to an insulator, since the defects present in the prior art can be overcome.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of the device of the present invention, Fig. 2 is an enlarged plan view of essential parts of the device of the present invention, Fig. 3 is a partially cutaway perspective view showing the operating state of the device of the present invention, and Fig. 4 is a FIG. 2 is a diagram showing the hydraulic and pneumatic systems of the device of the present invention. Hydraulic cylinder 1, switching valve 5, lateral molded member 8, molded notch 12, guide member 14, passage hole 16, lower hydraulic cylinder 18, piston 19, push-up molded member 21. Switching valve 22
, upper cap C1, lower cap C2, insulator ■, bulge P1. P2, rib area Ql. Q2゜

Claims (1)

[Scope of utility model registration request] A semicircular notch 11 corresponding to the constriction of the insulator is formed at the bottom along the notch 11, and the cross section is! A means for holding a pair of molded members 8, 8 in a state facing each other in a state in which a pair of molded members 8, 8 each having a quarter-arc shape and having a molded notch 12 at the tip corresponding to the shape of the constricted portion of the cap, and a means for holding a pair of molded members 8, 8 in a state facing each other; The bottom of the tank is connected to a hydraulic device equipped with a push-up means 21 for pressing the open end of the cap to be fixed onto the molding notches 12, 12 and drawing and molding it along the shape of the round part. Cap attachment device for insulators.