JPH0526687Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is used to protect electrical wiring and appliances by attaching it to indoor wiring inlets and branch circuits, or to control the operation of electric motors, etc. The present invention relates to a power switchgear.

[Conventional technology] Conventionally, there has been a stand that has clips that hold the caps at both ends of a fusible tube and is fixed to a panel of a switchboard or control board, and a lid that holds the fusible tube in a central insulating tube section so that it can be removed and replaced. By stacking the lid on the base, the fusible cylinder is clamped by the clip, and the lid and base are fixed, and by separating the lid and the base, the fusible cylinder is released from the clip. A power switchgear configured to be removed is known.

In such a power switchgear, the fusible tube can be easily replaced by simply stacking the lid holding the fusible tube on the stand or pulling it apart, and it also prevents electric shock during maintenance and inspection. This has the advantage of preventing accidents such as running or being shot.

[Problems to be solved by the invention] However, since fusible tubes generally have different capacities depending on the breaking capacity, rated current, rated voltage, etc., the fusible tube may melt due to overcurrent, etc. When replacing the fusible tube temporarily or periodically to prevent deterioration of the fusible tube, it is necessary to match the rating of the fusible tube and the rating of the mounting base. Due to standardization, molten cylinders have the same size and shape within a certain range of ratings, and the ratings are only indicated in small letters on the surface. Due to standardization, the stands installed in parallel to the panel have the same size and shape within a certain rating range, and the maximum rating is only displayed in a small size on the side, so the rating is narrow. It is generally displayed in a small size in the gap between the panels. Therefore, checking the rating of the fusible tube and the stand requires a great deal of attention and requires a lot of effort and time, making it extremely difficult to install the fusible tube and making sure that the rating of the fusible tube and the stand are different. If fusible tubes are attached, there is a risk of a serious accident occurring, and when managing a large number of power switchgears, there are problems such as inventory control of fusible tubes is not easy. Therefore, Japanese Utility Model Application Publication No. 147558/1983 proposes that a name plate be attached to the base and the lid to indicate that the fusible tube held by the lid should be attached to a base with the same rating as that of the fusible cylinder. You have to read and check the letters, symbols, numbers, etc. on the nameplate, which can be time consuming in an emergency to restore a power outage caused by a fuse, and there is a risk of misreading and installing it on the wrong stand when replacing it in a dimly lit place. The above problem cannot be completely solved.

The present invention has been developed in view of these circumstances, and it not only allows the fusible cylinder to be replaced easily and safely without the need for attachment/detachment tools, but also allows the fusible cylinder to be replaced accurately and quickly. The present invention provides a power switchgear that allows for easy maintenance and inventory management of fusible tubes.

[Means for solving the problem] In order to solve the above problem, the power switchgear according to the present invention has a clip that clips the caps at both ends of a fusible tube, and is fixed to a panel of a switchboard or control board. A power switchgear comprising a combination of a stand and a lid that holds a central insulating cylinder part of the fusible cylinder and is stacked on the stand, and wherein the fusible cylinder can be removed and replaced by the lid, The stand and the fusible cylinder are each provided with a mark that can be identified by rating, and the mark on the stand is made of tape pasted across the front of the portion between the clips, and The tube sign is characterized by consisting of tape wrapped around and affixed to an insulating tube.

[Function] A lid holding a fusible tube with a rating-specific identification mark that matches the rating-specific identification mark provided on the stand is combined with the stand, and the caps at both ends of the fusible cylinder are attached to the stand. Attach it to the clip.

[Example] Next, an example of the present invention will be described based on the drawings.

The drawing shows an embodiment of the power switchgear according to the present invention, and the power switchgear 1 mainly includes a stand 2 fixed to a panel of a switchboard or control panel, a lid 3 stacked on this stand 2, and a cover 3 that is stacked on the stand 2. , a fusible cylinder 4 held by a lid 3, and marks 5 and 6 that can be identified by rating provided on the stand 2 and the fusible cylinder 4, respectively.

The stand 2 is made of an insulating material such as hard synthetic resin, Bakelite, or ceramics, and has shielding walls 21, 21 on both sides, and openings 22, 22 formed in the center thereof. The clips 24, 24 and the terminal plates 25, 25 are overlapped with the mounting hole 23 of the terminal in between, and the screws 26, 26
, and then screw 2 for tightening the conductive wire.
7 and 27 are screwed onto the terminal plates 25 and 25 and inserted into the holes 28 and 28 of the base 2.

The lid 3 is made of, for example, a hard synthetic resin having light-transmitting properties, and has a size such that it can be overlapped with the shielding walls 21, 21 of the table 2, and is fitted into the openings 22, 22 on both sides of the central portion of the substrate 31. Bottom walls 32, 32 having a groove 32a in the center are formed, and holding parts 33, 33 with U-shaped end faces are formed to loosely fit the central insulating cylinder part 41 of the fusible cylinder 4 between these walls. In addition, window holes 34, 34 are formed in the central portion, and a handle 35 is formed protruding from the outer surface along one of the window holes 34. On the inner surface of the lid 3, conductive caps 4 are fitted to both ends of the insulating cylinder part 41 when the fusible cylinder 4 is fitted to the holding parts 33, 33.
A protrusion 36 in contact with each end face of 2a and 42b
a and 36b are formed protrudingly with an interval slightly larger than the length of the fusible tube 4, and the protrusion 36a is an elastic piece 37 with an L-shaped side surface protruding from the inner surface of the substrate 31.
is integrally formed at the end of the In addition, the protrusion 36
Seats 38a and 38b of the caps 42a and 42b having arc-shaped recesses on their inner surfaces are formed facing the central window holes 34 and 34, and further between the seats 38b and the window hole 34, An inclined surface 39 is formed to bend the elastic piece 36c toward the substrate 31 as shown in FIG.
The distal end peripheral edge of the tube 4 is brought into contact with the inclined surface 39 and advanced until it hits the protrusion 36b while sliding parallel to the substrate 31. Then, the elastic piece 37 is released and the fusible tube 4 is returned to its original state. is the holding part 33,3
3. It is surrounded by the seats 38a, 38b and the protrusions 36a, 36b and held in the lid 3, and is taken out from the lid 3 by the reverse procedure.

The signs 5 and 6 are formed by thin tapes such as paper or cloth coated with an adhesive on the back side, and the fusible tubes 4 are marked on the front side with a rated current of 1A, yellow for rated current, red for 2A, green for 3A, etc. A color containing a different phosphor is applied to each rating so that each rating can be identified at a glance. is pasted across the front of the portion of the base 2 between the clips 24, 24, over the openings 22, 22 of the shielding walls 21, 21 and the attachment hole 23.

In the power switchgear 1 having such a configuration, the base 2 is fixed to a panel 8 of a power distribution board or control board using screws 7 inserted into the mounting holes 23, and the lid 3 holding the fusible tube 4 is stacked on the base 2. Then, the skirt walls 32, 32 are fitted into the openings 22, 22, respectively, and the caps 42a, 42b are held and fixed by the clips 24, 24, respectively. At this time, labels 5 and 6 are affixed to the fusible tube 4 held by the lid 3 and the base 2, respectively.If the labels 5 and 6 are aligned with each other and the lid 3 and the base 2 are combined and fixed, the base 2 The fusible cylinder 4 having a rating corresponding to the rating can be installed without fail, and in particular, since the markers 5 and 6 are formed of colored tape, it is extremely easy and reliable to confirm the rating. Further, when replacing the fusible tube 4, by pulling the handle 35, the fusible tube 4 comes out from the clips 24, 24, and the lid 3 comes off the base 2.

According to this embodiment, the mark 5 of the fusible cylinder 4 is provided by being wrapped around the insulating cylinder part 41, so that it can be seen no matter what phase it is held on the lid 3. Since the sign 6 is placed across the front, it can be seen very easily, and in an emergency to restore a power outage caused by a meltdown or when replacing it in a dimly lit place, it can be accurately identified at a glance to prevent incorrect installation work. This can be done quickly without any hassle, and inventory management of the fusible tubes 4 is also extremely easy. Furthermore,
The lid 2 is translucent and has a window hole 3 in the substrate 31.
4, 34, it is very convenient to be able to see the marker 5 through the substrate 31 or from the window holes 34, 34 while the fusible cylinder 4 is held in the lid 3. Part 22, 2
2 and the attachment hole 23 can be confirmed from the direction of the substrate 31 even when the lid 3 is assembled, so that incorrect attachment can be easily confirmed and accidents can be prevented. Furthermore, the signs 5 and 6 have excellent visibility because they are colored with phosphor, and can fully demonstrate their identification function even in a switchboard or the like that is generally installed in a narrow, dark place.

Note that the stand 2 and the lid 3 are not limited to the configurations of the above embodiments, but may also include a stand that has clips that hold the caps at both ends of the fusible tube and is fixed to a panel of a switchboard or control board, and an insulating tube in the center of the fusible tube. The lid may have other configurations as long as it can be removed and replaced while holding the lid and stacked on the stand. Further, in the above embodiment, the lid 3 is made of a hard synthetic resin that is translucent, but it may be made of hard synthetic resin that is not translucent, such as Bakelite,
It may also be made of an insulating material such as ceramics.

[Effects of the invention] With the above configuration, the present invention not only allows the fusible tube to be replaced easily and safely without the need for attachment/detachment tools, but also allows the fusible tube to be replaced accurately and quickly. This method not only effectively prevents serious accidents caused by mistakenly attaching fusible tubes with different ratings, but also facilitates inventory management of fusible tubes. It is something.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view showing the stand and lid separated, FIG. 2 is a side view showing the attached state, and FIG. Fig. 4 is a plan view showing the installation state; Fig. 5 is a cross-sectional view of the center of Fig. 2; Fig. 6 is a bottom view of the lid; Fig. 7 is a lid holding the fusible cylinder. It is an explanatory diagram showing a method. 1... Power switchgear, 2... Stand, 24... Clip, 3... Lid, 4... Fusible tube, 41... Insulating cylinder portion, 42... Cap, 5, 6... Marker.

Claims (1)

[Scope of utility model registration request] A stand 2 which has clips 24, 24 for holding caps 42, 42 at both ends of the fusible tube 4 and is fixed to a panel of a switchboard or a control panel, and a stand 2 which holds the insulating tube part 41 at the center of the fusible tube 4. It consists of a combination with a lid 3 stacked on the stand 2, and the fusible tube 4 is combined with the lid 3.
In the power switchgear which is said to be removable and replaceable, the stand 2 and the fusible tube 4 are provided with labels 5 and 6 that can be identified by rating, respectively,
The sign 6 of the stand 2 consists of a tape pasted across the front of the area between the clips 24, 24;
Further, the power switchgear is characterized in that the mark 5 of the fusible tube 4 is made of a tape wrapped around and affixed to the insulating tube portion 41.