JPH0617440Y2 - Rotary brushing device for speaker yoke - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a device for brushing the upper peripheral surface of a speaker yoke with a rotating brush, and evenly cleans the peripheral surface of the yoke even if the yoke diameter changes. In addition, the brushing force of the brush can be automatically adjusted appropriately to perform good cleaning of the yoke, and the durability of the brush can be improved.

<Prior Art> The basic structure of a rotary brushing device for a speaker yoke to which the present invention is applied is that a rotary frame 2 can be rotationally driven by a motor 3 on a support frame 1 as shown in FIG. 3 or 7. The brush 4 is supported by the rotating frame 2 so as to be movable in the radial direction R of rotation, and the brush 4 is pressed and closed by the pressing and closing device 6.
In addition to the push-close operation, the open-back device 5 is configured to open the device in the centrifugal direction B against the push-close device 6.

As a conventional technique of this type, as shown in FIG. 7, a fulcrum 50 is formed on the rotary frame 2, and two support arms 51, 51 are pivotally supported on the fulcrum 50 so as to be swingable in an X shape. , The middle portions of the support arms 51 and 52 are connected by a tension spring 6 to push and close both arms, and the opening return device 5 is brought into contact with the upper ends of both arms to resist the push closing force of the tension spring 6. There is a structure in which the brushes 4 are attached to the lower ends of both arms.

<Problems to be Solved by the Invention> (1) In the above-mentioned conventional technique, when brushing a plating stripping protrusion or the like on the surface of the yoke that occurs in inventory, both brushes 4 are attached to the peripheral surface of the yoke. Since it abuts by swinging, when the yoke diameter has a specific size, it abuts uniformly over the entire length, but when the yoke diameter is large, the swing angle is insufficient and the upper part If the yoke diameter is large, on the contrary, if the yoke diameter is large, the swing angle becomes excessive and the lower portion comes into partial contact and the upper portion is insufficiently cleaned.

(2) When the diameter of the yoke is small, the peripheral speed of the brush 4 contacting the yoke is slow, and the divergence angle of both support arms 51 and 52 is small, so that the tensile force of the tension spring 6 is small. The brushing force of the brush 4 with respect to is reduced, and cleaning failure easily occurs.

(3) When the yoke diameter is large, the peripheral speed of the brush 4 contacting the yoke is high, and the divergence angle of both support arms 51 and 52 is large, so that the tensile force of the tension spring 6 is large. The brushing force of the brush 4 against the force becomes too large, and the brush 4 is worn quickly.

An object of the present invention is to perform good cleaning even if the yoke diameter changes.

<Means for Solving Problems> Means for achieving the above-mentioned problems will be described below with reference to FIGS. 1 to 6 corresponding to the embodiment.

That is, the present invention uses the centrifugal weight 7 as the closing device 6,
The centrifugal weight 7 is movably supported on the rotary frame 2 so as to obtain a motion component in the radial direction R, and the brush is translated in the radial direction R in the posture parallel to the rotation axis 8 of the rotary frame 2. It is characterized in that the brush 4 is freely supported and interlocked with the centrifugal weight 7 so that the brush 4 is closed by the centrifugal force of the centrifugal weight 7.

<Operation> The brush 4 moves in a posture parallel to the rotation axis 8 of the rotary frame 2 and in parallel with the radial direction R of rotation of the rotary frame 2, and regardless of the size of the yoke diameter, A uniform force is applied along the length to clean the yoke cleanly.

When the yoke diameter is small, the peripheral speed of brushing becomes slower, and the brushing force due to the rubbing speed is unavoidable. However, since the centrifugal force increases as the radius of rotation of the centrifugal weight 7 increases, the brushing force due to the contact pressure increases. In this manner, the brushing force compensates for the weakening due to the decrease in the peripheral speed with the stronger one due to the increase in the centrifugal force, so that the brushing force can be maintained at an appropriate level and strong and clean brushing can be performed.

On the other hand, when the yoke diameter is large, the brushing force is corrected by the action opposite to that described above, because the brushing force becomes too strong due to the excessive peripheral speed, and the brushing force becomes weak due to the decrease in centrifugal force. Therefore, the brush 4 is not worn early.

<Effect of the invention> (1) Regardless of whether the yoke diameter is large or small, the brush moves in parallel and abuts with a uniform force along the length direction of the yoke circumferential surface. It is possible to clean evenly and strongly over the entire area.

(2) When the diameter of the yoke is small, the brushing force is weakened due to the decrease in peripheral speed with the force increased due to the increase in centrifugal force, so that the brushing force can be maintained at an appropriate level and strong and clean brushing can be performed. .

(3) When the yoke diameter is large, the brushing force is corrected to the extent that it becomes too strong due to the excessive peripheral speed, and is corrected by the amount that becomes weaker due to the decrease in centrifugal force. Not doing so can increase its durability.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of the periphery of the push-closing device, FIG. 2 is a perspective view of the push-closing device integrated, FIG. 3 is a front view of the rotary brushing device, and FIG. 4 is a right side around the rotary frame. FIG. 5 is a cross-sectional plan view of the pushing and closing device, FIG. 6 is a bottom view of the device, and the rotary brushing device includes a frame 11 standing on the base 10 and a vertical direction along the frame 11. A moving support frame 1, a rotating frame 2 rotatably provided on the support frame 1,
A brush 4 supported by a rotating frame 2 so as to be movable in a radial direction R of rotation, a pressing and closing device 6 and an opening and returning device 5 for the brush 4.
Composed of and.

The guide screws 12 are attached to the upper and lower sides of the frame 11, and the upper ends of the guide screws 12 are interlockingly connected to the height adjusting motor 14,
The above-mentioned receiving frame 15 is screwed onto the frame 2, and the receiving frame 15 is supported so as not to rotate relative to the frame 11.

In addition, the main body side of the lift drive cylinder 16 is fixed to the receiving frame 15, and the outlet rod 17 thereof is connected to the support frame 1.

At this time, if the lifting cylinder 16 is driven, the receiving frame 1
The support frame 1 and the brush 4 supported by the support frame 1 move vertically with respect to 5.

Further, when the height adjusting motor 14 is driven, the receiving frame 15 moves up and down relatively by the rotation of the guide screw 12, whereby the support frame 1 fixed so as to be movable along with the output rod 17. Moves gently up and down, and the height of the brush 4 can be finely adjusted to an appropriate position.

A rotary shaft 18 is vertically supported on the support frame 1 through a bearing 19, and an upper part of the rotary shaft 18 is interlockingly connected to a motor 3 supported by the support frame 1, and a U-shaped rotation is provided below the rotary shaft 18. Fix the frame 2.

The push-closing device 6 includes two guides 2 pivotally supported on the rotary frame 2.
0 and two centrifugal weights 7 slidably fitted therein (see FIGS. 5 and 6).

The guide 20 is axially supported by the opposite wall of the rotary frame 2 in the left-right direction, the centrifugal weight 7 is fitted into one guide 20, and the support arm 22 extending from the centrifugal weight 7 in the front-rear direction is attached to the other guide 2.
The two centrifugal weights 7 and 7 are slidable in the left-right direction along the guide 20 by being inserted into 0.

A guide frame 21 having an L-shaped cross section is fixed below the centrifugal weight 7, one end 21a of the guide frame 21 is aligned with one end wall 7a of the centrifugal weight 7 on the side where the support arm 22 is extended, and the other end, that is, the vertical The wall 21b extends to a position away from the other end wall 7b of the centrifugal weight 7.

That is, to the centrifugal weight 7 arranged on the right side of the rotary frame 2, a guide frame 21 that largely extends from the right side wall 2a of the rotary frame 2 toward the left side wall 2b is fixed, and the centrifugal frame 7 arranged on the left side of the rotary frame 2 is fixed. A guide frame 21 that greatly extends from the left side wall 2b of the rotary frame 2 toward the right side wall 2a is fixed to the weight 7.

A brush support 22 having an E-shaped cross section is fixed to the vertical wall 21b of the guide frame 21, and two support grooves 2 are provided in the brush support 22.
3 is formed, and the brush 4 is fitted into each support groove 23.

At this time, one side wall 21c of the guide frame 21 near the support arm
Is aligned with the center line C of the rotary frame 2 and one side wall 21c of the guide frame 21 fixed to the centrifugal weights 7 is slidably in contact with the center line C.

The brush support 22 is fixed to the vertical wall 21b of the guide frame so that its center coincides with the center line C of the rotating frame.

As a result, as shown in FIG. 5, the brush 4 approaches the center of the yoke Y of the speaker, that is, the rotation axis 8 of the rotation axis 18 while being arranged point-symmetrically.

On the other hand, the opening return device 5 includes a brush opening cylinder 25 fixed to the support frame 1, a pressing member 26 externally fitted on the rotary shaft 18 so as to be vertically slidable, a cylinder 25 and a pressing member 26.
And a transmission arm 27 for connecting the two, and an opening lever 28 for moving the centrifugal weight 7 in the left-right direction.

The engaging groove 29 formed in the central portion of the pressing member 26 and the support frame 1
The transmission arm 27 is interposed between the fixed arm 30 extending from
The output rod 25a of the brush opening cylinder 25 is swingably connected to the transmission arm 27 via the connecting member 31 at the center of the transmission arm 27.

The release lever 28 includes two lever arms 28a, 2 and
8b are pivotally supported at fulcrums 32 in a substantially X shape, and the upper end 33 of the lever arm is brought into contact with the bottom wall surface of the pressing member 26.

Further, the lower end 34 of each lever arm is formed in a fork shape, and the fork portion 34 is engaged with an engagement pin 36 protruding from the support arm extension side end wall 35 of the centrifugal weight 7.

The function of the rotary brushing device in this embodiment will be examined below.

(1) When the yoke Y is positioned at a predetermined station on the transfer line, the lifting drive cylinder 16 positions the brush 4 at a predetermined height, and the adjustment motor 14 finely adjusts the brush 4 to an appropriate position.

(2) When the brushes 4 are set on the yoke Y, the opening return device 5 acts to hold the pair of brushes 4 in the open state.

That is, when the output rod 25a of the brush opening cylinder 25 is pushed down, the pressing member 26 slides down the rotary shaft 18 via the transmission arm 27, and the opening lever 28 is released.
Is swung in the closing direction, that is, in the direction of arrow P.

Due to the movement of the opening lever 28, the centrifugal weight 7 slides in the centripetal direction A, and the brushes 4 open in the directions away from each other.

(3) When the motor 3 is rotated, the rotating frame 2 is rotated, and the centrifugal weight 7 receives a centrifugal force about the rotation axis 8 to guide the guide 20.
It moves in the centrifugal direction B along.

Along with this, the brush 4 provided on each brush support 22 is
Since they move along with the centrifugal weight 4, they move closer to each other while moving parallel to the radial direction R of rotation.

That is, as shown in FIGS. 5 and 6, since the centrifugal weight 7 and the brush 4 that moves along with the centrifugal weight 7 are located on the opposite sides of the rotation axis 8, the front and rear centrifugal weights 7 When 7 moves away from each other in the centrifugal direction B, the pair of brushes 4 approaches each other.

Therefore, the rotation of the rotary shaft 18 causes the brush 4 to move to the yoke Y.
Approaching in parallel with the rotation axis 8 and contacting the yoke Y
Brush while fitting the outer diameter of.

If the diameter of the yoke Y is small, the position of the brush 4 approaches the rotating shaft center 8 to reduce the peripheral speed, but since the centrifugal weight 7 moves away from the center 8, the centrifugal force increases and the brush for the yoke Y increases. The contact pressure of 4 increases.

On the contrary, if the diameter of the yoke Y is large, the position of the brush 4 moves away from the rotation axis 8 to increase the peripheral speed, but the centrifugal weight 7 approaches the center 8, so that the centrifugal force is reduced and the brush Y is moved toward the yoke Y. The contact pressure of the brush 4 is reduced.

As a result, the peripheral velocity of the brush 4 and the contact pressure are inversely proportioned to each other, and the brushing force can be appropriately maintained regardless of the outer diameter of the yoke Y.

As described above, according to the present invention, the centrifugal weight is used for the brush closing device so that the brush can be moved in parallel in the radial direction of rotation of the brush. Not only two pieces may be provided but also one piece or a large number of pieces of three or more pieces may be provided.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is an exploded perspective view of the vicinity of a push-closing device, FIG. 2 is a perspective view of the push-closing device integrated, and FIG. 3 is a rotary type. FIG. 4 is a front view of the brushing device, FIG. 4 is a right side view of the periphery of the rotating frame, FIG. 5 is a cross-sectional plan view of the push-closing device, FIG. 6 is a bottom view of the device, and FIG. FIG. 1 ... Support frame, 2 ... Rotating frame, 3 ... Motor, 4 ... Brush, 5
... opening / retracting device, 6 ... push-closing device, 7 ... centrifugal weight, A ... centripetal direction, B ... centrifugal direction, R ... 2 radial direction.

Claims (1)

[Scope of utility model registration request] 1. A support frame 1 supports a rotary frame 2 rotatably driven by a motor 3, and a rotary frame 2 supports a brush 4 movably in a radial direction R of rotation. In the rotary brushing device of the yoke of the speaker configured to push and close in the centripetal direction A and to open and return in the centrifugal direction B against the push and close device 6 by the opening and returning device 5, the centrifugal weight 7 is used as the push and close device 6. Using the centrifugal weight 7, the rotary frame 2
Is movably supported so as to obtain a motion component in the radial direction R, and the brush is movably supported in the radial direction R on the rotary frame 2 in a posture parallel to the rotation axis 8 of the rotary frame 2. Rotating brushing device for speaker yoke, characterized in that brush 4 is interlockingly connected to centrifugal weight 7 so that brush 4 is pressed and closed by centrifugal force of 7.