JPH0447917Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a brush device for current collection used in an apparatus for annealing steel plates, a plating apparatus for rolled steel plates, etc. used in steel manufacturing companies.

(Prior Art) FIG. 13 shows a current collector using a conventional brush holder. In FIG. 13, reference numeral 1 denotes a brush holder, which includes a brush pusher 3, a shaft 5 that supports it, and a torsion spring 2 for pressurizing the brush 6. Reference numeral 4 denotes a protrusion provided on the brush pusher 3, which locks the torsion spring 2. 7 is a slip ring which is attached to the brush pusher 3 by a torsion spring 2.
and is pressurized via the brush 6. Note that 8 is a lead wire that is integrally crimped to the brush.

To replace the brush 6 in such a structure, the torsion spring 2 is removed from the protrusion 4 of the brush pusher 3, so that no pressure is applied to the brush 6, and the brush pusher 3 is pulled upwards. . In some cases, the brush holder 1 may not be replaced unless it is removed from a holder mounting plate (not shown). Recent current collectors have increased in capacity and are equipped with a large number of brushes 6, so replacing the brushes requires a great deal of time, effort, and cost. Furthermore, since this current collector is used in a corrosive atmosphere, the torsion spring 2 rusts and the pressure decreases, and the shaft 5 also rusts, which impedes the operation of the brush pusher 3. For this reason, brush 6
Since the pressure applied to the current is greatly reduced, the current unbalance becomes very large. Further, the corrosive gas causes rust on the walls 11 and partitions 12 of the pocket 9 of the brush holding box 10 shown in FIG. 14, so that the brush 6 becomes stiff inside the pocket 9 and the brush holding box 10 is damaged.

(Problems that the invention attempts to solve) As a solution to the above-mentioned problems,
As shown in No. 108362 and Japanese Utility Model Application Publication No. 57-89292, the wall 11 and partition 12 shown in Fig. 14 of a brush holding box that stores a plurality of brushes are removed (only the parts necessary for reinforcement are left). ), a brush holder is used that can adjust the spring pressure applied to multiple brushes at the same time.

However, even with these brush holders, replacing the brushes requires removing the brushes in order from the part opposite to the part where the brush holder is attached to the current collector (brush holder attachment part, 33 in Figure 14). This was an impossible structure due to the small space available for the electrical equipment, and was extremely inconvenient.

The object of the present invention is to provide a brush device that overcomes the above-mentioned drawbacks.

(Means for Solving the Problems) The present invention provides a brush device in which a plurality of brushes are installed and each brush is attached and detached from the upper part of a brush holding member. A brush holding member having a pair of side walls with facing grooves facing each other is attached to the brush holder main body, and engaging members that engage and move in the grooves are protruded from both sides of the brush, and the engaging members are The present invention relates to a brush device that engages with the groove and holds the brush only by the pair of side walls.

In the present invention, the brush holding member corresponds to a conventional brush holding box, but it only holds the brush with two opposing side walls, and is not shaped like a box, but with the other two sides of the brush. is free. The two side walls are provided with a groove extending from the top toward the slip ring, and the side walls 40 on both sides of the groove 26 are formed into a U-shape, as shown in FIG. 4, for example.

The engaging members protruding from both sides of the brush may have a shape and size that allows them to engage with the grooves and move along the grooves, and movement may be by sliding or by rotation of the engaging members. In order to provide the engaging member, it is preferable to attach movable bearings whose outer diameters engage with the grooves at both ends of a shaft passing through both side surfaces of the brush. The shaft may have a diameter such that both ends can be engaged with the groove. It is preferable to provide two engaging members protruding in the direction of the groove because this will stabilize the sliding movement of the brush. Furthermore, the engaging member may be made of the same material as the brush, and may be provided integrally with the brush by processing the brush material. Also, the side wall of the brush holding member and the side surface of the brush do not come into close contact, and there is a gap between them.
It is preferable to provide this to prevent the brush from becoming stiff due to rusting or dust adhesion.

(Example) Next, the present invention will be explained with reference to examples.

Embodiment 1 FIGS. 1 and 2 are a side view and a plan view showing a brush device according to an embodiment of the present invention, in which four brushes are attached in the axial direction of a slip ring 7. The brush holding member 25 has a groove 26 in the side wall 40 shown in the plan view of FIG. 3 and the side view of FIG.
As shown in FIG. 1, the lower part of the brush pusher 14 is rotatably attached with a rivet 29. A roller 23 is rotatably attached to the tip of the brush pusher 14 that presses the brush 20 with a pin 24 to make pressure uniform. Furthermore, in order to press the brush 20 against the slip ring 7, a hole 3 is provided in the brush holding member 25 between the brush holding member and the brush pusher.
A tension spring 17 with a hook portion hooked to a spring hook pin 28 attached through the spring hook 4 and a hole provided in the brush pusher 14 is tensioned. The brush holding member 25 configured in this manner is fixed to the brush holder main body 13 with a set screw 27. A handle 15 is attached to the upper surface of the brush pusher 14 with a rivet 16 to facilitate replacement of the brush 20.

On the other hand, as shown in the plan view of FIG. 5 and the side view of FIG. and install the bearing 19,
A hole 35 is provided from the other side of the brush to the shaft 18, and the bolt 22 is screwed through the hole 35 into a screw hole 36 provided in the shaft 18 as shown in FIG. Fix it like this.

As shown in FIG. 1, the brush 20 configured as described above is attached to the brush holding member
It is used by engaging the groove in the brush and pressing it against the slip ring 7 with the brush pusher 14.

When replacing the brush, all you have to do is rotate the brush pusher 14 using the handle 15 as shown in FIG. 7, release the pressure, and pull the brush 20 upward.
The brush at any position in FIG. 2 can be replaced.

Embodiment 2 FIG. 8 is a side view of a brush device using a compression spring instead of a tension spring, and the groove 38 provided in the side wall 40 of the brush holding member 25' and the configuration of the brush 20 are the same as in Embodiment 1. 30 is a coiled compression spring, 32 is a pin with a plate attached to the lower part that comes into contact with the upper part of the brush 20, 31 is a spring stop formed of a metal plate, and 39 is a spring pressure adjusting spring attached to the brush holder body. It's easy. compression spring 30
Then, the pin 32 inserted through the hole provided in the spring stop 31 is placed on the brush 20, and the spring stop is pushed down to engage the upper end of the spring stop with the rack 39 at a position where the required pressure is applied.
When replacing the brush, remove the spring stopper 31 from the rack 39, remove the pin 32, and then remove the brush 2.
Just pull out 0. Even in a brush device equipped with a plurality of brushes, if the above structure is used, the brushes at any position can be replaced.

Example 3 Brush material was processed and the plan view of Fig. 9 and Fig. 10 were
As shown in the side view of the figure, a brush 41 is integrally provided with convex portions 42 as engagement members on both opposing sides.
shall be. The brush 41 has a through hole 44 and a recess 43.
As shown in the side view of FIG. 11 and the front view of FIG. Attach the wire 21 to the brush 41. The brush 41 is used as a member of the brush device shown in FIG. 1 or FIG. 8.

(Effects of the invention) According to the invention, the brushes in a brush device equipped with a plurality of brushes can be replaced by a simple operation regardless of the brush installation position, and therefore the replacement work can be done in a short time. Since the brush can be held by the pair of side walls of the holding member, processing of the brush device is simple, and stiffness of the brush can be prevented. Furthermore, any method such as tension, compression, constant pressure, etc. can be used to pressurize the brush.

[Brief explanation of the drawing]

1 and 2 are a side view and a plan view of a brush device according to an embodiment of the present invention, and FIGS. 3 and 4 are a plan view and a side view of a brush holding member used in the brush device of FIG. 1. , FIGS. 5 and 6 are a plan view and a side view of the brush used in the brush device shown in FIG. 1, FIG. 7 is a side view illustrating how to replace the brush in the brush device shown in FIG. 1, and FIG. FIGS. 9 and 10 are side views of brush devices according to other embodiments of the present invention; FIGS. 11 and 10 are plan and side views of other brushes used in the brush device of FIGS. 12 is a side view and a front view showing how the lead wires are attached to the brush in FIG. 9, FIG. 13 is a side view of a current collector using a conventional brush holder, and FIG. 14 is a collection of the brushes in FIG. 13. FIG. 3 is a plan view showing a brush holding box of the electrical device. Explanation of symbols, 1...Brush holder, 2...Torsion spring, 3...Brush pusher, 4...Protrusion, 5
... Shaft, 6 ... Brush, 7 ... Slip ring, 8 ... Lead wire, 9 ... Pocket part, 10
... Brush holding box, 11 ... Wall, 12 ... Partition, 1
3...Brush holder body, 14...Brush pusher, 15...Handle, 16...Rivet, 17...
Tension spring, 18... Shaft, 19... Bearing, 20... Brush, 21... Lead wire, 22...
...Bolt, 23...Roller, 24...Pin, 2
5...Brush holding member, 26...Groove, 27...Set screw, 28...Spring pin, 29...Rivet, 30...Compression spring, 31...Spring stop, 32...Pin, 33... Brush retainer mounting part, 34...hole, 35...hole, 36...screw hole,
37...Brush pusher, 38...Groove, 39...
Rack, 40...Side wall, 41...Brush, 42...
...Convex portion, 43...Concave portion, 44...Through hole, 45...
...Natsuto.

Claims (1)

[Scope of utility model registration request] In a brush device in which a plurality of brushes are attached and each brush is attached and detached from the upper part of a brush holding member,
A brush holding member having a pair of side walls facing each other with grooves extending from the top toward the slip ring side for each brush is attached to the brush holder main body, and the brush holding member moves into engagement with the grooves on both sides of the brush. A brush device comprising an engaging member protrudingly provided, the engaging member engaging the groove portion, and the brush being held by only the pair of side walls.