JPH035067Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a disconnector operating hook rod used to manually open and close a disconnector.

(Prior art) A hook rod for operating a disconnector has a hook protruding in the radial direction at the tip of the insulating rod, which is hooked onto a movable contact for opening and closing the disconnector, and the insulating rod is pulled to open and close the disconnector. A movable contact is brought into contact with or separated from a fixed contact to open and close a circuit.

Therefore, JIS requires that the hook be attached to the insulating rod with an axial tensile strength above a certain value.
It is defined in the standard (JIS C 4510-1977). However, as shown in FIG. 4, for example, a hook rod for operating a disconnector has a structure in which a cap-shaped mounting member 4 having a hook 3 reinforced with an iron core 2 is attached to the tip of an insulating rod 1. Since the mounting member 4 is likely to come off in the axial direction of the insulating rod 1, the above-mentioned tensile strength is likely to be insufficient.

Therefore, conventionally, as shown in FIG.
A hook rod for operating a disconnector is used, in which the base of a hook 8 made of glass fiber reinforced resin is inserted into a mounting hole 7 provided concentrically in the radial direction of the insulating rod 5 and the hook support member 6 with the interposition of an adhesive. was.

(Problem to be solved by the invention) However, in the conventional example described above, the hook 8 is fitted into the insulating rod 5 from the radial direction.
Although the hook 8 has a large tensile strength against the tensile force acting in the axial direction of the insulating rod 5, the short side of the insulating rod 5 There was a problem in that the hook 8 did not have sufficient tensile strength against the tensile force acting in the direction of the arrow A in FIG. 5, and the hook 8 easily came off in the direction of the arrow A.

Therefore, the technical problem to be solved by the present invention is to attach a hook to an insulating rod with sufficient tensile strength in the axial and radial directions of the insulating rod.

(Means for solving the problem) A technical means for solving the above problem is to provide a hook having at least one end protruding in the radial direction at the tip of an insulating rod made of an insulating material, and connect the hook to a disconnector. A hook rod for operating a disconnector, which is hooked onto a movable contact for opening and closing to operate it, the base of the hook being fitted into a mounting hole provided in the radial direction at the tip of the insulating rod; This hook is fixed to the insulating rod by a screw screwed into the insulating rod from a direction intersecting the direction in which the hook is inserted.

(Function) Among the tensile forces applied to the hook, the hook itself, which is inserted into the insulating rod from the radial direction, resists the tensile force that acts in the axial direction of the insulating rod, and the tensile force that acts in the radial direction of the insulating rod The screw that fastens the base of the hook resists this.

(Embodiment) Next, the configuration of an embodiment of the present invention will be described based on FIGS. 1 and 2.

The insulating rod 10 of the hook rod 9 for operating a disconnector is formed into a cylindrical shape with a predetermined length using vinyl chloride, which is an insulating material. The portion below the line 11 is a grip portion 12.

A cylindrical hook support member 13 made of insulating synthetic resin is tightly fitted to the inner circumference of the upper end of the insulating rod 10, and a flange for a stopper is integrally formed at the upper end of the hook support member 13. The hook support member 13 is positioned by bringing the hook support member 14 into contact with the upper end surface of the insulating rod 10. The circumferential surface of the cylindrical portion of the hook support member 13 is
Thin horizontal grooves 15 are provided over the entire surface,
Moreover, it is bonded to the inner circumferential surface of the insulating rod 10 with an adhesive 16.

Approximately in the middle of the cylindrical portion of the hook support member 13, there is a mounting hole 17 extending in the radial direction of the insulating rod and opening on one side of the circumferential surface across the axis of the hook support member 13. Attachment holes 18 having the same center and the same diameter are provided, and the base of a straight culm-shaped hook 20 made of stainless steel is fitted into these attachment holes 17 and 18. The hook 20 has a locking portion 19 at its tip that can be hooked onto a movable contact of a disconnector. When providing the mounting holes 17 and 18 concentrically, the mounting holes 17 are provided in the hook support member 3, and the opening direction thereof is marked with a marked line 21 on the flange 14, and the insulating rod 10 After the fitting operation, the mounting hole 18 may be formed in the insulating rod 10 using the marked line 21 as an index.

Further, a fixing hole 22 concentric with the axis of the hook support member 13 is provided through the base of the hook 20, and a bottom surface of a circular recess 23 provided at the center of the top surface of the hook support member 13. A screw hole 24 is provided from the center along the axis of the hook support member 13 and intersects with the mounting hole 17. Therefore hook 2
The fixing hole 22 of No. 0 communicates concentrically with the screw hole 24, and is connected to the screw hole 24 via a washer 25.
The screw 26 for fixing the hook screwed into the fixing hole 2
2 is inserted and tightened.

Blind cylindrical upper cap 27 made of insulating material
is the tip of the insulating rod 10 and the hook support member 1
A circular convex portion 28 for preventing removal, which is closely attached to the flange 14 of No. 3 and protrudes from the wall portion of the closed end side of the upper cap 27, is tightly fitted into the recess portion 23. Note that a recess 29 is provided on the top surface of the convex portion 28 to accommodate the head of the screw 26 and the washer 25.

Further, a lower cap 31 is also attached to the lower end of the insulating rod 10 via a washer 30 that is in contact with the lower end surface of the insulating rod 10. The lower cap 31 is similar to the upper cap 2.
It is made of the same material and has the same shape as 7, but the convex part 2
8 is not essential.

The operating condition and operation of this embodiment configured as described above will be explained based on FIG. The circuit is opened and closed by moving the movable contact 36 pivotally connected to the movable contact 35 into and out of contact with the movable contact 36. , the grip portion 12 of the insulating rod 10
, insert the hook 20 into the locking hole 37 of the movable contact 36, and in this state pull the insulating rod 10 in the axial direction (in the direction of the arrow in the figure). Perform the reverse operation in the same manner.

In the above operation, when the insulating rod 10 is pulled in the direction of the arrow in the figure, a tensile force acts between the hook 20 and the insulating rod 10, but since the hook 20 is fitted into the insulating rod 10 from the radial direction, , the hook support member 13 will not come off. In addition, the hook support member 13
is firmly adhered to the inner circumferential surface of the insulating rod 10 with an adhesive on the surface where the grooves 15 are formed.
No rattling occurs with respect to the insulating rod 10, and therefore no rattling of the hook 20 occurs either.

Next, during the operation, a tensile force may be applied in the radial direction of the insulating rod 10, that is, in the direction in which the hook 20 is removed from the mounting holes 17 and 18, but the hook 20 is fixed to the hook support member 13 by the screw 26. Therefore, hook 20 cannot be removed.

Further, since an insulating upper cap 27 and a lower insulating cap 31 are attached to the upper and lower ends of the insulating rod 10, the hook 20, the screw 26, and the insulating rod 10
Electric conduction to the upper and lower ends of the insulating rod 10 through dust and moisture in the inner space of the insulating rod 10 is interrupted by the upper and lower caps 27 and 31. Further, the upper and lower caps 27 and 31 protect the upper and lower ends of the insulating rod 10 from damage caused by contact with other objects.

In addition, as another embodiment of the present invention, although not shown, a screw for fixing the hook is inserted into the insulating rod in the radial direction of the insulating rod and in a direction that intersects with the direction in which the hook is inserted. It may be constructed so as to be inserted through the fastening hole. In this case, if the screw is made of conductive material, the opening of the screw hole of the insulating rod should be closed with an insulating material by an appropriate method.

Further, the insulating rod 10 and the hook support member 13 may be integrally formed from the same insulating material. Furthermore, the type of insulating material is not limited to those mentioned above.

(Effect of the invention) When the hook rod for operating a disconnector of the present invention is operated by hooking the hook into the hooking hole of the movable contact of the disconnector, the axis of the insulating rod out of the external force acting on the hook is The insulating rod has its own strength to resist external forces in the radial direction, and the screws resist external forces in the radial direction of the insulating rod, thereby ensuring the strength of the hook against external forces. This makes it possible to improve work safety.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the present invention;
The figure is a vertical cross-sectional view of a main part of the same embodiment, FIG. 3 is a view showing its usage state, and FIGS. 4 and 5 are vertical cross-sectional views showing a conventional example. 9... Hook rod for disconnector operation, 10... Insulating rod, 13... Hook support member, 17, 18... Mounting hole, 20... Hook, 22... Fixing hole, 26...
…screw.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An insulating rod made of an insulating material is provided with a hook at the tip of which at least one end protrudes in the radial direction, and the hook is hooked to a movable contact for opening and closing a disconnector. This is a hook rod for operating a disconnector, and the base of the hook is fitted into a mounting hole provided in the radial direction at the tip of the insulating rod, and the hook is attached to the insulating rod. A hook rod for operating a disconnector, characterized in that it is fixed by a screw inserted from a direction intersecting the insertion direction. (2) The hook rod for operating a disconnector according to claim 1, wherein at least the attachment portion of the hook in the insulating rod is a solid body. (3) The utility model characterized in that the insulating rod is made of a cylindrical body, and a hook support member having a hook attachment hole and a screw attachment hole is fitted into the hook attachment portion at the tip. A hook rod for operating a disconnector according to claim 1.