JP5763568B2 - Cutout operation stick - Google Patents

Description

  The present invention relates to a cutout operating rod suitable for use in a box-shaped cutout fuse replacement operation.

  The transformer installed in the utility pole has a box-shaped cutout 100 (as shown in FIG. 4) in order to cut the circuit by a fuse when an excessive current flows in the circuit (first and second electric wires W1, W2). A box-shaped high-pressure cut-out) is provided.

The box-shaped cutout 100 includes a main body 110, a lid body 120, and a support metal fitting 130 (see, for example, Patent Document 1 below).
In the following, for simplicity of explanation, the surface of the main body 110 to which the support fitting 130 is attached is referred to as an “upper surface”, and the surface opposite to the upper surface of the main body 110 is referred to as a “bottom surface”. The surface on the electric wire W1 side of the main body 110 is referred to as “front surface”, the surface on the second electric wire W2 side of the main body 110 is referred to as “back surface”, and the surface on the paper side of FIG. The side opposite to the page is the “right side”. The same applies to the lid 120.

The main body 110 has a shell formed of a box-shaped insulator. In addition, a first electric wire W1 connected to a commercial power source is passed through the front side of the main body 110 so as to penetrate the left and right side surfaces of the main body 110, and connected to a load device on the back side of the main body 110. The second electric wire W <b> 2 is passed through the left and right side surfaces of the main body 110. The bottom surface of the main body 110 is an opening surface, and a fuse cylinder 200 described later can be set on the main body 110 by closing the lid 120.
The lid 120 has an outer shell made of an insulator. The lid 120 is pivotally supported by a pin 111 attached to the back side of the main body 110. A hook 121 for opening and closing the lid 120 is attached to the front side of the bottom surface of the lid 120. As shown in FIG. 5C, two grooves for inserting left and right claws 231 </ b> L and 231 </ b> R (described later) of the fuse cylinder 200 are formed on the left and right sides, respectively, inside the front side of the lid 120. The fuse cylinder holding metal fitting 122 is fixed.
The support fitting 130 is for installing the box-shaped cutout 100 on a utility pole together with a transformer, and is attached to the upper surface of the main body 110.

As shown in FIGS. 5A to 5C, the fuse cylinder 200 includes a cylindrical arc extinguishing cylinder 210 and a cap 220.
In the following, for simplicity of explanation, the right end of the arc extinguishing cylinder 210 in FIG. 5A is referred to as “terminal”, and the left end of the arc extinguishing cylinder 210 in FIG. The arc side of the arc tube 210 is “upper side”, the opposite side of the arc extinguishing tube 210 is “lower side”, and the lower side of the arc extinguishing tube 210 is “left side”. The upper side of the cylinder 210 in FIG. The same applies to the first and second conductive fittings 231 and 232 and the bush 250.

The arc extinguishing cylinder 210 is made of an insulating synthetic resin.
The cap 220 is attached to the end of the arc extinguishing cylinder 210. By removing the cap 220 from the arc-extinguishing cylinder 210, the fuse can be accommodated in the arc-extinguishing cylinder 210 or taken out from the arc-extinguishing cylinder 210.
First and second conductive fittings 231 and 232 that are electrically connected to both ends of the fuse housed in the arc-extinguishing cylinder 210 are fixed to the outer peripheral surfaces of the terminal part and the center part of the arc-extinguishing cylinder 210, respectively. ing.
Left and right claws 231L and 232R are respectively attached to the left and right sides of the first conductive fitting 231. In addition, rectangular plate-shaped first and second contact blades (blade contacts) 241 and 242 having a thickness of 1.5 mm are provided above the outer peripheral surfaces of the first and second conductive fittings 231 and 232, respectively. They are attached so that the (plate surfaces) are on the same plane and the longitudinal direction is the radial direction of the arc extinguishing tube 210.
A cylindrical bushing 250 made of an insulating synthetic resin is fixed to the distal end portion of the arc extinguishing tube 210, and the display tube 270 is separated from the distal end portion of the bushing 250 when the fuse is blown.
A fuse fastening screw 260 for fixing a fuse accommodated in the arc-extinguishing cylinder 210 is attached to the upper side of the outer peripheral surface of the distal end portion of the arc-extinguishing cylinder 210.

  The fuse cylinder 200 is held by the fuse cylinder holding bracket 122 (see FIG. 5C) so that the first and second contact blades 241 and 242 are positioned upward as shown by broken lines in FIG. When the lid 120 is closed as shown by a solid line in the figure, the first contact blade 241 comes into contact with the first contact (not shown) inside the main body 110 and becomes the first electric wire W1. The second contact blade 242 contacts with a second contact (not shown) inside the main body 110 and is electrically connected to the second electric wire W2 while being electrically connected. .

As shown in FIGS. 6 (a) and 6 (b), a cutout operation rod 300 used for fuse replacement work when a fuse inside the fuse cylinder 200 is blown out includes a cylindrical handle 310 and a cylindrical insulating rod. 320, a cylindrical hook bar 330 having a spherical tip end portion, and a fuse tube attaching / detaching tool 340.
In the following, for simplicity of explanation, the right end of the cutout operation bar 300 in FIG. 6A is referred to as “terminal”, and the left end of the cutout operation bar 300 in FIG. 6 is referred to as “tip”. The paper surface side of the cut-out operation bar 300 is referred to as “upper side”, and the side opposite to the paper surface of the fuse cylinder 200 is referred to as “lower side”.

The end of the insulating rod 320 is fixed to the tip of the handle 310 so that the center axis coincides with the center axis of the handle 310.
As shown in FIG. 6B, the hook bar 330 is bent at a right angle toward the lower side of the insulating bar 320, and the end is integrally attached to the tip of the insulating bar 320.
The fuse cylinder attachment / detachment tool 340 is attached to an attachment hole formed on the upper side of the tip of the insulating rod 320 with a screw. An insertion hole 340a for inserting and penetrating the first contact blade 241 of the fuse cylinder 200 (having a rectangular opening surface in which the axial direction of the insulating bar 320 is a vertical direction) is provided at the center of the fuse cylinder attachment / detachment tool 340. .) Is formed.

  The length of the cutout operation rod 300 (the length from the end of the handle 310 to the tip of the insulating rod 320) is 470 mm, and the length (vertical length) and width (lateral direction) of the opening surface of the insertion hole 340a. Are 18 mm and 2.5 mm.

The fuse replacement operation when the fuse inside the fuse cylinder 200 is blown is performed as follows.
The worker wears high-pressure rubber gloves, climbs up to the utility pole on which the box-shaped cutout 100 is installed, and then holds the handle 310 of the cutout operation bar 300 with one hand to operate the hook. The lid 120 of the box-shaped cutout 100 is opened by hooking the tip of the bar 330 on the hook 112 of the box-shaped cutout 100 and pulling it forward.
Subsequently, the operator operates the cutout operation rod 300 to insert the first contact blade 241 of the fuse cylinder 200 into the insertion hole 340a of the fuse cylinder attachment / detachment tool 340 from the upper side of the cutout operation bar 300 to penetrate therethrough. .
Subsequently, the worker pushes up the cut-out operation rod 300 along the longitudinal direction of the fuse cylinder 200 and removes the fuse cylinder 200 from the fuse cylinder holding bracket 122 of the lid 120 so that the fuse cylinder 200 does not fall. The fuse cylinder 200 is removed from the lid 120 while operating the cut-out operation rod 300.
Subsequently, the worker pulls the cut-out operation bar 300, removes the first contact blade 241 of the fuse cylinder 200 from the insertion hole 340a, and releases the fuse cylinder 200 and the cut-out operation bar 300.
Subsequently, the worker opens the cap 220 (see FIG. 5A) of the fuse cylinder 200, takes out the blown fuse, stores the new fuse in the fuse cylinder 200, and then closes the cap 220 of the fuse cylinder 200. .
Subsequently, the operator operates the cutout operation rod 300 and inserts the first contact blade 241 of the fuse cylinder 200 into the insertion hole 340a of the fuse cylinder attachment / detachment tool 340 from the upper side of the cutout operation bar 300 to penetrate therethrough. .
Subsequently, the worker stores the fuse cylinder 200 in the lid 120 while operating the cutout operation rod 300 so that the fuse cylinder 200 does not fall.
Subsequently, the operator pulls down the cut-out operation rod 300 along the longitudinal direction of the fuse cylinder 200, and attaches the fuse cylinder 200 to the fuse cylinder holding bracket 122 of the lid 120 to hold it.
Subsequently, the operator operates the cut-out operation rod 300 to remove the first contact blade 241 of the fuse tube 200 from the insertion hole 340a of the fuse tube attachment / detachment tool 340, and remove the fuse tube 200 and the cut-out operation rod 300. After the release, the lid 120 of the box-shaped cutout 100 is closed by hooking the tip of the hook bar 330 of the cut-out operation bar 300 onto the hook 112 of the box-shaped cutout 100 and pushing it up.

  As described above, the worker performs the fuse replacement operation by operating the cutout operation rod 300 so that the fuse cylinder 200 does not fall. However, the first contact blade 241 holds the fuse cylinder 200 in the cutout operation bar 300. Is simply inserted into the insertion hole 340a of the fuse tube attaching / detaching tool 340 and penetrates, so that there is a problem that the fuse tube 200 is easily dropped.

  Therefore, in the following Patent Document 2, the present applicant configures a fitting portion that fits the contact blade of the fuse cylinder as a fixed portion and an operating portion, and uses a gear to make the operating portion linear or arcuate. We have proposed a cut-out operation bar for box-shaped cut-out that is configured to grip the contact blade by operating.

JP 2011-048927 A JP 2010-244826 A

However, in the cut-out operation rod 300, in addition to the above-described problems, the first contact blade 241 of the fuse cylinder 200 is inserted into or removed from the insertion hole 340a of the fuse cylinder attachment / detachment tool 340 due to the following factors. There was also a problem that it took time to do.
(Factor 1) The angle of the first contact blade 241 and the angle of the insertion hole 340a are matched, and the first contact blade 241 is inserted into or removed from the insertion hole 340a while maintaining the angle. There is a need to.
(Factor 2) When the force is applied to the lid 120 of the box-shaped cutout 100, the above-described angle mismatch occurs.
(Factor 3) The width (= 2.5 mm) of the insertion hole 340 a is as narrow as about 1.67 times (= 2.5 / 1.5) the thickness (= 1.5 mm) of the first contact blade 241.

  In addition, the cut-out operation bar proposed in Patent Document 2 is superior in that the fuse cylinder 300 can be prevented from falling compared to the cut-out operation bar 300 having no fuse cylinder gripping means, An operating part for operating the operating part in a straight line or arc shape is provided in the rod-shaped part, and the operator operates the operating part by operating the operating part with the other hand while holding the cut-out operating bar with one hand. Therefore, there is a problem that the number of parts increases and workability is not so good.

  An object of the present invention is to provide a cut-out operating bar having a simple configuration and capable of improving the workability of box-shaped cut-out fuse replacement work.

The cut-out operating bar of the present invention is a cut-out operating bar (10) for use in replacing the fuse of the fuse cylinder (200) attached to the box-shaped cutout (100), and has a handle (11). And an insulating rod (12) whose end is fixed to the tip of the handle, a hook rod (13) whose end is attached to the tip of the insulating rod, and a mounting hole formed in the tip of the insulating rod. A fuse cylinder attaching / detaching tool (14) formed with an insertion hole (14a) for insertion and penetration of the first contact blade (241) of the fuse cylinder at the center thereof, and the fuse cylinder The first and second cam-like members (15, 16), which are mounted in a detachable tool and sandwich the first contact blade, are provided.
Here, the first and second cam-like members are the same in size and shape, and are arranged on the handle side of the insertion hole so as to be a line object with the longitudinal center line of the insertion hole as a target axis. You may pivotally support by the 1st and 2nd attachment pin so that rotation to the edge part is possible respectively.
When the first and second cam-shaped members are rotated toward the longitudinal center line of the insertion hole, the first and second cam-shaped members are brought into contact with both contact surfaces of the first contact blade of the fuse cylinder, respectively. You may attach with the space | interval which clamps 1 contact blade.
The insertion hole may have a rectangular opening surface whose longitudinal direction is the axial direction of the insulating rod, and the width of the insertion hole may be twice the thickness of the first contact blade.

The cut-out operation bar of the present invention has the following effects.
(1) Since the first and second cam-like members for sandwiching the first contact blade of the fuse cylinder need only be attached to the fuse cylinder attachment / detachment tool, a simple configuration can be achieved.
(2) Since the first contact blade of the fuse cylinder can be clamped by the first and second cam-like members, the operator can work without much concern about the fall of the fuse cylinder, so the fuse replacement work The workability can be improved.
(3) Since the width of the insertion hole of the fuse cylinder attaching / detaching tool can be doubled by the thickness of the first contact blade of the fuse cylinder, the fuse cylinder can be easily attached and detached.
(4) The deformation of the first contact blade when the fuse cylinder is attached can be reduced.

It is a top view which shows the structure of the cutout operation stick | rod 10 by one Example of this invention. It is a figure for demonstrating the usage method of the cutout operation stick | rod 10 shown in FIG. It is a figure for demonstrating the usage method of the cutout operation stick | rod 10 shown in FIG. It is a figure which shows the structure of the box-shaped cutout 100. FIG. 5A and 5B are diagrams showing the configuration of the fuse cylinder 200 shown in FIG. 4, wherein FIG. 5A is a top view of the fuse cylinder 200, FIG. 4B is a side view of the fuse cylinder 200, and FIG. It is a figure for demonstrating the function of 231L, 231R. It is a figure which shows the structure of the conventional cutout operation stick | rod 300, (a) is a top view of the cutout operation stick 300, (b) is a side view of the cutout operation stick 300.

  The above object is realized by attaching the first and second cam-like members for sandwiching the first contact blade of the fuse cylinder in the fuse cylinder attaching / detaching tool.

Hereinafter, embodiments of the cut-out operation bar of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the cutout operating rod 10 according to one embodiment of the present invention includes a fuse cylinder attaching / detaching tool 14 and first and second cam-like members 15 and 16, and a fuse cylinder. The width (lateral length) of the insertion hole 14a of the detachable tool 14 is 3.0 mm, which is twice the thickness (= 1.5 mm) of the first contact blade 241 of the fuse cylinder 200 (= 3.0 / 1). .5) It is different from the cut-out operation rod 300 shown in FIGS.

Here, the first and second cam-like members 15 and 16 have the same size and shape, and the insertion holes 14a are line-targeted with the longitudinal center line of the insertion hole 14a as the target axis. The end of the handle 11 is pivotally supported by first and second mounting pins so as to be rotatable.
Further, when the first and second cam-like members 15 and 16 are rotated about the first and second mounting pins toward the longitudinal center line of the insertion hole 14a, respectively, as shown in FIG. As shown, the fuse cylinder 200 is attached with an interval so as to contact the both contact surfaces (both plate surfaces) of the first contact blade 241 and sandwich the first contact blade 241.

Next, with respect to the work procedure when performing the fuse replacement work of the box-shaped cutout 100 using the cutout operation rod 10, the insertion hole 14a of the fuse tube attachment / detachment tool 14 is viewed from above the cutout operation rod 10. This will be described with reference to FIGS. 2 (a) and 2 (b) and FIGS. 3 (a) and 3 (b).
In the following, for simplicity of explanation, the end on the right side of the cutout operation bar 10 in FIG. 1 is referred to as “end”, and the end on the left side of the cutout operation bar 10 in FIG. The side of the operation bar 10 in the same figure is referred to as “upper side”, and the side of the cutout operation bar 10 opposite to that in the same figure is referred to as “lower side”.

  The worker wears high-pressure rubber gloves, climbs up to the utility pole on which the box-shaped cutout 100 is installed, and then operates the handle 11 of the cutout operation bar 10 with one hand to operate the hook. The lid 120 of the box-shaped cutout 100 is opened by hooking the tip of the bar 13 on the hook 112 of the box-shaped cutout 100 and pulling it forward.

Subsequently, the operator operates the cutout operation rod 10 to insert the first contact blade 241 of the fuse cylinder 200 from the upper side of the cutout operation rod 10 into the insertion hole 14 a of the fuse cylinder attachment / detachment tool 14. (See FIG. 2 (a)).
At this time, since the width (= 3.0 mm) of the insertion hole 14a is about twice the thickness (= 1.5 mm) of the first contact blade 241, the angle of the first contact blade 241 and the insertion Even if the angle with the hole 14a is slightly deviated, the first contact blade 241 can be inserted into the insertion hole 14a.

Subsequently, the worker pushes up the cut-out operating rod 10 along the longitudinal direction of the fuse cylinder 200 and removes the fuse cylinder 200 from the fuse cylinder holding bracket 122 (see FIG. 5C) of the lid 120. Then, the fuse cylinder 200 is taken out from the lid 120 while operating the cutout operation rod 10.
At this time, the insertion hole 14a moves linearly from the handle 11 side toward the hook side 13 with respect to the first contact blade 241 as indicated by an arrow in FIG. The cam-like members 15 and 16 are pushed by the end of the first contact blade 241 on the handle 11 side, and as shown by the arrows in the figure, the vertical direction of the insertion hole 14a is centered on the first and second mounting pins. Rotate toward the direction center line.
As a result, both contact surfaces of the first contact blade 241 come into contact with the first and second cam-shaped members 15 and 16, respectively, and the first contact blade 241 is in contact with the first and second cam-shaped members 15 and 16. Therefore, the worker can work without worrying about the fuse cylinder 200 dropping.

  Subsequently, the worker pulls the cut-out operation rod 10, removes the first contact blade 241 of the fuse cylinder 200 from the insertion hole 14 a, and releases the fuse cylinder 200 and the fuse cylinder attachment / detachment tool 14.

  Subsequently, the worker opens the cap 220 (see FIG. 5A) of the fuse cylinder 200, takes out the blown fuse, stores the new fuse in the fuse cylinder 200, and then closes the cap 220 of the fuse cylinder 200. .

  Subsequently, the operator operates the cutout operation rod 10 to insert the first contact blade 241 of the fuse cylinder 200 from the upper side of the cutout operation rod 10 into the insertion hole 14 a of the fuse cylinder attachment / detachment tool 14. (See FIG. 2 (a)).

Subsequently, the worker slides the fuse cylinder 200 toward the handle 11 side of the cutout operation rod 10.
As a result, the insertion hole 14a moves linearly from the handle 11 side toward the hook side 13 with respect to the first contact blade 241 of the fuse cylinder 200, so the first and second cam-like members 15 and 16 are The first contact blade 241 is pushed by the end portion on the handle 11 side and rotates about the first and second mounting pins toward the longitudinal center line of the insertion hole 14a (FIG. 2B). )reference).
As a result, both contact surfaces of the first contact blade 241 of the fuse cylinder 200 come into contact with the first and second cam-shaped members 15 and 16, respectively, and the first contact blade 241 has the first and second cam shapes. It is pinched by the members 15 and 16 (refer Fig.3 (a)).

Subsequently, the worker stores the fuse cylinder 200 in the lid 120 while operating the cutout operation rod 10.
At this time, since the first contact blade 241 of the fuse cylinder 200 is sandwiched between the first and second cam-like members 15 and 16, the worker can work without worrying about the fuse cylinder 200 dropping. can do.

Subsequently, the worker pulls down the cut-out operation rod 10 along the longitudinal direction of the fuse cylinder 200 and attaches the fuse cylinder 200 to the fuse cylinder holding metal fitting 121 of the lid 120 to hold it.
At this time, the insertion hole 14a moves linearly from the hook side 13 toward the handle 11 side with respect to the first contact blade 241 of the fuse cylinder 200 as indicated by an arrow in FIG. The second cam-like members 15 and 16 are pushed by the end of the first contact blade 241 on the handle 11 side, and are inserted around the first and second mounting pins as indicated by arrows in FIG. Each of the holes 14a rotates in a direction away from the longitudinal center line of the hole 14a.
As a result, the first contact blade 241 is separated from the first and second cam-like members 15, 16, so that the fuse cylinder 200 can be removed from the cutout bar 10.

  Subsequently, the operator operates the cut-out operation bar 10 to remove the first contact blade 241 of the fuse cylinder 200 from the insertion hole 14a of the fuse cylinder attachment / detachment tool 340, and then the hook bar 13 of the cut-out operation bar 10. The lid 120 of the box-shaped cutout 100 is closed by hooking the tip of the hook onto the hook 112 of the box-shaped cutout 100 and pushing it up.

  As described above, by using the cutout operation rod 10 according to the present embodiment, the worker can easily perform the fuse replacement work of the box-shaped cutout 100.

10, 300 Cutout operation bar 11, 310 Handle 12, 320 Insulation bar 13, 330 Hook bar 14, 340 Fuse tube attachment / detachment tool 14a, 340a Insertion hole 15, 16 First and second cam-like members 110 Main body 111 Pin 120 Lid 121 Hook 122 Fuse cylinder holding metal fitting 130 Support metal fitting 200 Fuse cylinder 210 Arc extinguishing cylinder 220 Caps 231 and 232 First and second conductive metal fittings 231L and 232R Left and right claws 241 and 242 First and second contact blades 250 Bush 260 Fuse tightening screw W1, W2 First and second electric wires

Claims (4)

A cutout operating rod (10) for use in replacing a fuse of a fuse cylinder (200) attached to a box-shaped cutout (100),
A handle (11),
An insulating rod (12) having an end fixed to the tip of the handle;
A hook bar (13) having an end attached to the tip of the insulating bar;
An insertion hole (14a) is formed in an attachment hole formed in a tip portion of the insulating rod, and the first contact blade (241) of the fuse cylinder is inserted and penetrated in a central portion. A fuse tube attaching / detaching tool (14);
First and second cam-like members (15, 16) mounted in the fuse tube attaching / detaching tool and for sandwiching the first contact blade;
A cut-out operation bar characterized by comprising:   The first and second cam-like members have the same size and shape, and are arranged at the end of the insertion hole on the handle side so as to be a line object with the longitudinal center line of the insertion hole as an object axis. The cutout operation bar according to claim 1, wherein the cutout operation bar is pivotally supported by the first and second mounting pins so as to be rotatable.   When the first and second cam-shaped members are rotated toward the longitudinal center line of the insertion hole, the first and second cam-shaped members are brought into contact with both contact surfaces of the first contact blade of the fuse cylinder, respectively. The cut-out operation bar according to claim 2, wherein the cut-out operation bar is attached with an interval for sandwiching one contact blade. The insertion hole has a rectangular opening surface whose longitudinal direction is the axial direction of the insulating rod,
The width of the insertion hole is twice the thickness of the first contact blade,
The cutout operation bar according to any one of claims 1 to 3, wherein the operation bar is a cutout operation bar.

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