JP2000048927A - Sliding brush manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding brush manufacturing device which can manufacture a strong sliding brush wherein the lead wires composed of twisted wires do not come off from a brush body and can realize mass production of the sliding brushes. SOLUTION: This device comprises: a material supply means 4 corresponding to the stop position of a die 3 formed on a turntable 2; an upper punch 5 to embed a lead wire (1) composed of twisted wires in brush material powder supplied to the die 3 and form a brush body by pressing the brush material powder; an upper punch control means 6 to control the vertical movement of the upper punch 5; a lead wire control means 7 to control the movement of the lead wire (1); a lead wire cutting means 8 to cut the lead wire (1) into a constant length; a welding means 9 to weld a cut end 1t of the lead wire (1); and a brush push out means 11 to push up a lower punch 10 and push out a sliding brush from the die 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a sliding brush used in a DC rotary electric device, and more particularly to an apparatus for manufacturing a sliding brush capable of manufacturing a strong sliding brush with high productivity.

[0002]

2. Description of the Related Art In general, a DC motor, a DC generator, and other DC rotating electric devices use a sliding brush for performing a rectifying action by contacting the surface of a cylindrical commutator.

In this sliding brush, for example, a die is filled with a carbon material, a lead wire made of a stranded wire is inserted, compression-molded into a rectangular parallelepiped shape by a press machine, and the lead wire is cut. It will be commercialized later.

[0006] As shown in FIG. 6, for example, a conventional sliding brush manufacturing apparatus 40 is provided with a raw material supply means 41 and a die 42.
Is filled with a carbon material, and the lead l of the sliding brush held in the upper punch 43 protruding downward by a predetermined length is supplied to the upper punch control means 44 having a lead wire feed control means.
Is lowered along the guide plate 45, and the lower punch is raised from below to form the sliding brush B, and the upper punch control means 44 having a built-in lead wire feed control means which releases the holding of the lead wire l is provided. Then, the upper punch 43 is raised. Thereafter, the lead wire cutting means 46 is advanced from the side to cut the lead wire l.

The sliding brush B to which the lead wire l has been attached in this way is further removed from the die 42 by lowering the lower punch, and is dropped and stored in the storage box 48 by the arm device 47 for payout. Since the posture of the sliding brush B in the dispensing process in the dispensing process is not constant, the lead wire l is bent. Further, in order to prevent the cut end of the formed sliding brush B from falling apart, in a later process, the bent lead wires l are extended one by one manually by an operator and supplied to a spot welding machine. Spot welding was performed, and the sliding brush B was taken out of the spot welding machine manually by an operator.

The spot welding process at the cut end of the lead wire 1 has a problem that the work efficiency is poor and automation is difficult when the lead wire 1 of the sliding brush B is bent as described above. .

To solve such a problem, Japanese Utility Model Publication No. 6-9568 and Japanese Patent Application Laid-Open No. 7-336954 disclose a welding electrode constituting a welding cutter in contact with a stranded lead wire. And energize,
There is disclosed an apparatus for manufacturing a sliding brush which cuts a lead wire and simultaneously sets a cut end in a welded state to prevent the cut end from falling apart. However, the lead wire of the sliding brush manufactured by the sliding brush manufacturing apparatus of these disclosures is:
There is a drawback that the brush is easily detached from the brush body. That is, since the lead wire is cut off, the upper cut end exposed to the outside of the lead wire of the sliding brush is in a welded state, and the cut end is prevented from falling apart, but at the same time, it is manufactured next. Since the lower cut end of the lead wire of the sliding brush buried in the brush body is also in a welded state, the lead wire and the carbon material are not well adapted to each other, and the lead wire is easily removed from the brush body. Moreover, the disclosed sliding brush manufacturing apparatus melts and cuts a lead wire, and it takes time to melt and cut the lead wire, which is not preferable as a sliding brush manufacturing apparatus that is manufactured in an extremely large amount.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and it is possible to manufacture a strong sliding brush which does not come off from a brush body of a lead wire made of a stranded wire, and a sliding brush. An object of the present invention is to provide an apparatus for manufacturing a sliding brush capable of mass-producing a moving brush.

[0009]

According to the first aspect of the present invention, there is provided a turntable in which at least first to fourth stop positions are set from the upstream side in the rotational direction, and the same turntable as the turntable. A plurality of dies arranged at equal intervals on the circumference; and a raw material supply means disposed corresponding to a first stop position of the first dies and supplying brush raw material powder to the first dies; A lead wire made of a stranded wire is attached to the brush raw material powder which is provided corresponding to the second stop position of the first die moved by the rotation of the turntable and is supplied to the first die at the first stop position. An upper punch for embedding and pressing the brush material powder to form a brush body, an upper punch control means for controlling the vertical movement of the upper punch, a lead wire control means for controlling the movement of the lead wire, and a brush body. A lead wire cutting means for cutting an exposed portion of the provided lead wire to a predetermined length, and a cut lead arranged and cut corresponding to a third stop position of the first die moved by rotation of the turntable. Welding means for welding the cut end of the wire; and a sliding brush arranged to correspond to a fourth stop position of the first die moved by the rotation of the turntable, pushing up a lower punch and moving a sliding brush from the first die. The present invention provides a sliding brush manufacturing apparatus characterized by having a brush pushing means for pushing.

According to the second aspect of the present invention, a brush guide means is provided between the fourth stop position of the first die and the first stop position. The gist is that it is a device.

3. A sliding brush manufacturing apparatus according to claim 1, wherein the first stop position and the second stop position of the first die are set at the same position. The gist is that

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sliding brush manufacturing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, an apparatus 1 for manufacturing a sliding brush includes a turntable 2 which is driven by a motor and rotates, and an equal interval on the outer circumference of the turntable 2, for example, an interval having a center angle of 90 degrees. A plurality of, for example, four dies 3 arranged in the above manner, and dies 3 which are moved by the rotation of the turntable 2 are arranged in correspondence with positions where the dies 3 are stopped at equal intervals. Raw material supply means 4
An upper punch 5 for embedding the projecting portion lb of the lead wire 1 made of a stranded wire into the brush raw material powder supplied to the die 3 (see FIG. 5) and pressing the brush raw material powder to form the brush body Bb.
An upper punch control means 6 for controlling the vertical movement of the upper punch 5, a lead wire control means 7 for controlling the movement of the lead l, and a lead wire cutting means 8 for cutting the lead l into a certain length. Welding means 9 for welding the cut end of the lead wire l;
Brush pushing means 11 for pushing up the lower punch 10 and discharging the sliding brush B from the die 3.

The first die 3 of the four dies 3
In the first stop position S1, a raw material supply means 4 is disposed so as to be movable in the horizontal direction, and a brush raw material powder such as a brush raw material powder is fed from a raw material supply pipe 4a to a die 3a whose bottom is closed by a lower punch 10 by the raw material supply means 4. It supplies carbon material.

As shown in FIG. 2, the turntable 2
Stop position S2 of the first die 3a rotated by 90 degrees
Is provided with an upper punch 5 which is driven by a motor and moves up and down along an ascending and descending guide plate 12.

The upper punch control means 6 includes the lead wire control means 7 therein. The lead wire control means 7 comprises a lead wire holding means 14 and a lead wire feed control means 15. The lead wire control and holding means 14 is controlled by a spring 16 for urging the movable portion 5b of the upper punch 5 divided into a fixed portion 5a and a movable portion 5b in the normally open direction and a pair of actuators 17 to appropriately tighten the movable portion 5b. Alternatively, it is constituted by a tightening / releasing ring 19 for loosening and holding or releasing the lead wire 1 passing through the lead wire through hole 18.

The lead wire feed control means 15 is urged in a normally closed direction by a pair of grooved rollers 21 for appropriately holding the lead wire 1, a pair of small motors 22 for driving the rollers 21, and a spring 23. There is a solenoid 25 that appropriately separates the rollers 21 via a link mechanism 24. The lead wire feed control means 15 is not always necessary when the lead wire l has a high rigidity and the feed of the lead wire l is performed as the upper punch control means 6 moves up and down.

Further, the second stop position S of the first die 3a
2 is provided with the lead wire cutting means 8 having a scissor-shaped blade portion 26 as shown in FIG. 1, and cuts the lead wire l into a predetermined length.

As shown in FIG. 1 and FIG. 3, the third die 3a of the first die 3a in which the turntable 2 is rotated by 180 degrees.
At the stop position S3, the above-mentioned welding means 19 composed of a spot welding device is provided, which is cut in a previous step to weld the cut end lt of the lead wire l. The welding means 19 comprises an electrode 29 provided with a non-conductive guide 28 which is provided to be able to advance and retreat by a cylinder 27, and an electrode 30 provided on the opposite side of the electrode 29 with respect to the lead wire l.

As shown in FIG. 1 and FIG. 4, the fourth die of the first die 3a in which the turntable 2 is rotated by 270 degrees is used.
The brush pushing means 11 is provided at the stop position S4. The brush pushing means 11 pushes up the lower punch 10 in the die 3a and pushes out the sliding brush B from the die 3a.

As shown in FIG. 1, the first stop position S1 of the first die 3a is located on the outer circumference of the turntable 2.
Between the sliding brush B and the fourth stop position S4.
A brush guide means, for example, a brush guide plate 31, for dispensing the sliding brush B to the outside of the sliding brush manufacturing apparatus 1 is provided, and the sliding brush B dispensed along the brush guide plate 31 is stored outside the sliding brush manufacturing apparatus 1. Storage box 32
And a guide tray 33 for guiding the sliding brush B to the storage box 32.

Incidentally, as shown in FIG.
Is provided with a positioning hole 35 with which a positioning pin 34 is engaged.

Further, it is also possible to provide an inspection device such as a well-known electric measuring device or a CCD camera in the present sliding brush manufacturing device 1 to perform an inspection or the like online.

Since the sliding brush manufacturing apparatus 1 according to the present invention has the above-described structure, the manufacturing of the sliding brush B using the sliding brush manufacturing apparatus 1 will be described.

First, the positioning pin 34 is engaged with the positioning hole 35 of the turntable 2 to stop the turntable 2 at a predetermined position.

Next, the raw material supply means 4 is lowered to the lowest position, and the lower punch 10 supplies the carbon material to the die 3a whose bottom is closed. Further, the first die 3a is stopped at the second stop position S2 by rotating the turntable 2 at the same time as raising the raw material supply means 4 by 90 degrees.

The first die 3a stopped at the second stop position S2 is driven by a motor to raise and lower the guide plate 1.
The upper punch control means 6 is moved down along
Descend. A lead wire 1 penetrating the upper punch 5 to be lowered and extending through the upper punch control means 6 and the lead wire through hole 14 projects a predetermined length. Is held and fixed to the upper punch 5 by the action of. Further, the upper punch 5 is lowered to be held in the upper punch 5, and the protruding portion lb of the fixed lead wire 1 is buried in the carbon material of the die 3a.
To form a brush body Bb to which the lead wire l is attached.

At this time, the cut end lt of the lead wire 1 made of a stranded wire is in a state of being cut in the previous manufacturing cycle and is not in a welded state. Does not easily fall off the brush body Bb.

Next, the actuator 17 is operated to move the movable portion 15b by the action of the spring 6 through the tightening / releasing ring 22.
To release the lead wire 1 passing through the lead wire through hole 18. Simultaneously with the release of the lead 1, the lead feed control means 15 is operated. That is, the actuator 17 is operated to operate the link mechanism 24 to pinch the lead wire 1 between the rollers 21, raise the upper punch control means 6, and drive the motor 22 to rotate the roller 21 to change the lead wire 1. Send down. Lead wire feed control means 15
Accordingly, even if the rigidity of the lead wire l is low, the lead wire l can be smoothly sent downward.

Next, the lead wire cutting means 8 is operated to advance the scissor-shaped blade portion 26, the lead wire 1 is cut by the blade portion 26, and the lead wire cutting means 8 is operated again to cut the blade portion 26. Retract to the original position. Since the lead wire cutting step is performed by the blade portion 26 without relying on fusing, it can be cut very quickly.

Further, the first die 3a is stopped at the third stop position S3 by rotating the turntable 2 by 180 degrees. The cut end lt of the lead wire l cut in the previous step is welded by the welding means 9. For example, as shown in FIG. 3, the cylinder 27 of the welding means (spot welding apparatus) 9 is operated to advance the non-conductive guide 28 and the electrode 29, and the electrode 29 and the electrode 30 sandwich the lead wire l and perform the pre-process. Then, the cut end lt of the lead wire 1 is welded. The manufacturing of the sliding brush B using the present sliding brush manufacturing apparatus 1 separates the cutting of the lead wire l and the welding of the cut end lt by utilizing the exclusive functions of both, so that compared to the welding that is performed simultaneously with the melting. Rapid manufacturing of the sliding brush B is possible.

As described above, since the cut end lt of the lead wire l is automatically welded during the manufacturing process, the manufacturing process can proceed smoothly without the cut end lt being separated or bent in the subsequent process. it can. After the welding of the lead wire 1, the cylinder 27 is operated to move the electrode 29 back to the original position.

Further, the first die 3a is stopped at the fourth stop position S4 by rotating the turntable 2 by 270 degrees. At the fourth stop position S4, the brush pushing means 11
To push up the lower punch 10 in the die 3a.
Is extruded from the die 3a onto the turntable 2 as shown in FIG. The sliding brush B extruded onto the turntable 2 is guided by the brush guide plate 31 as the turntable 2 rotates, and is guided by the guide tray 33.
Is stored in the storage box 32 via the.

For the dies 3 other than the first die 3a, the same manufacturing process as that for the first die 3a is repeated, and a large number of sliding brushes B are continuously manufactured.

In the above embodiment, the first stop position and the second stop position
The stop position may be shifted by 90 degrees and set to the same position as the second stop position, and the first stop position may be left open for cleaning or the like.

[0036]

As is apparent from the above description, according to the apparatus for manufacturing a sliding brush according to the present invention, the cutting end of the lead wire 1 consisting of the stranded wire of the sliding brush B is kept cut. Since the lead wire is buried in the brush raw material powder, the lead wire and the brush raw material powder are well adapted to each other, and a strong sliding brush can be provided in which the lead wire does not easily fall off the brush body. Further, since the cut end is welded subsequently after cutting the lead wire l, the cut end can be smoothly advanced without being separated or bent in a subsequent process, and the lead wire can be manually extended or cut. This eliminates the need for spot welding and contributes to improving the productivity of the sliding brush.

The fourth stop position of the first die and the first stop position
Since the brush guide means is provided between the stop positions, the sliding brush is quickly sent out of the sliding brush manufacturing apparatus, so that the productivity is excellent.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sliding brush manufacturing apparatus according to an embodiment of the present invention, partially cut away.

FIG. 2 is a sectional view showing an upper punch control means used in the sliding brush manufacturing apparatus according to the embodiment of the present invention shown in FIG. 1;

FIG. 3 is a perspective view showing a welding means used in the apparatus for manufacturing a sliding brush according to the embodiment of the present invention shown in FIG. 1;

FIG. 4 is an explanatory view of brush pushing means used in the sliding brush manufacturing apparatus according to the embodiment of the present invention shown in FIG. 1;

FIG. 5 is an explanatory view of a sliding brush manufactured by the sliding brush manufacturing apparatus according to the embodiment of the present invention shown in FIG. 1;

FIG. 6 is an explanatory view of a conventional sliding brush manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sliding brush manufacturing apparatus 2 Turntable 3 Dice 3a First die 4 Raw material supply means 5 Upper punch 6 Upper punch control means 7 Lead wire control means 8 Lead wire cutting means 9 Welding means 10 Lower punch 11 Brush pushing means 12 Elevating guide plate 14 Lead wire holding means 15 Lead wire feed control means 16 Spring 17 Actuator 18 Lead wire through hole 19 Tightening ring 21 Slotted roller 22 Motor 23 Spring 24 Link mechanism 25 Solenoid 26 Blade 27 Cylinder 28 Non-conductive guide 29 electrode 30 electrode 31 brush guide plate 32 storage box 33 guide tray 34 positioning pin 35 positioning hole B sliding brush Bb brush body l lead wire lb lead wire protrusion lt lead wire cut end S1 first die stop Stop position S2 Second stop position of first die S3 Third stop position of first die S4 Fourth stop position of first die

Claims (3)

[Claims] 1. A turntable in which at least first to fourth stop positions are set from a rotation upstream, a plurality of dies arranged at equal intervals on the same circumference of the turntable, and a first of these dies. Material supply means arranged to correspond to the first stop position of the die and supplying brush material powder to the first die, and corresponding to the second stop position of the first die moved by rotation of the turntable An upper punch which embeds a stranded lead wire in the brush material powder supplied to the first die at the first stop position and presses the brush material powder to form a brush body; Upper punch control means for controlling the vertical movement of the punch, lead wire control means for controlling the movement of the lead wire, lead wire cutting means for cutting the exposed portion of the lead wire embedded in the brush body to a certain length, Previous Welding means for welding a cut end of the cut lead wire, which is disposed corresponding to the third stop position of the first die moved by the rotation of the turntable,
A brush pushing means disposed to correspond to a fourth stop position of the first die moved by the rotation of the turntable and pushing up a lower punch to push a sliding brush from the first die. Sliding brush manufacturing equipment. 2. A first stop position of the first die and a first stop position of the first die.
2. The sliding brush manufacturing apparatus according to claim 1, wherein brush guide means are provided between the stop positions. 3. A first stop position of the first die and a second stop position of the first die.
The sliding brush manufacturing apparatus according to claim 1 or 2, wherein the stop positions are set at the same position.