JPH0624542A - Ball supply device - Google Patents

Abstract

PURPOSE:To implement the automation of ball-banishing by supplying a ball with a small diameter to an object to be processed using a fast and stable operation. CONSTITUTION:The drop of balls with a small diameter 32 onto a through hole 34 is facilitated by agitating the center of a ball tank with a poker. In order to reduce the frequency of the agitatin if the agitation causes the balls 32 to collide against each other and get damaged, a detector 48 detects that the flow of the balls 32 is stopped for a certain period of time when there is no ball remaining in a tube 46, and the agitation of a poker 41 is stopped once the balls 32 start to move. If a cylinder 53 is used to move the slider 53 from first position to second position when the leading ball 32 is in the through hole 51a of a slider 51, the balls 32 moves in parallel for the distance corresponding to one ball and the leading ball is supplied via a through hole 50a in a position where the through hole 51a overlaps a through hole 43a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is mainly used for VTR cylinders, FDDs, magneto-optical disks, HDDs such as HDDs, sliding of main shafts of rotary bodies of information-related equipment products, fluid bearings, or inner diameter finishing of main shaft support members. The present invention relates to a ball supply device for automating a ball burnishing device.

[0002]

2. Description of the Related Art Recently, AV, information-related equipment products have undergone significant technological reforms in the short term, such as downsizing, weight reduction, and quality improvement, and even in the field of production technology, mass production capacity directly affects the product cost, which is rationalized. Automated unmanned equipment is a prerequisite. In particular, in the above-mentioned product group having a rotating body, the shaft and bearing characteristics largely influence the performance of the product, and the members constituting these are not only required to have high-precision machining and finishing accuracy. It has become an urgent task to obtain the processing accuracy of the above with a higher yield and to make unmanned work.

Conventionally, a ball burnish method of passing a steel ball having a high dimensional accuracy with a working fluid while applying pressure is used for finishing such a small diameter inner diameter of the bearing portion and the shaft support portion. Particularly, when the inner diameter is 3 mm or less, it is difficult to form a cutting tool by cutting, and the plastic working by the ball burnish method is effective because of problems of insufficient rigidity and life. Therefore, it is necessary to automate this ball burnish method.

A conventional ball supply device will be described below. FIG. 7 is a functional diagram of a ball removing operation in the first conventional ball supply device. In FIG. 7, an opening is provided at the upper end of one end of the guide 1.
The small-diameter balls 2 are arranged and supplied in a line. The suction pad 4 supported by the support means 3 is connected to the output side of the switching valve 5 via a pipe, and the input side of the switching valve 5 is connected to the vacuum supply source 6 via a pipe. .

FIG. 8 is a functional diagram of an operation of placing a small diameter ball on a workpiece in the conventional first ball supply device. In FIG. 8, the workpiece 8 to be ball burnished is supported and placed so as to fit on the fixing jig 7.

FIG. 9 is a functional diagram including a ball burnishing operation in the first conventional ball supply device. In FIG. 9, the pusher 9 is for pushing out the small diameter ball 2, and a conical recess 9a is provided on the end surface of the pusher 9, which is in contact with the small diameter ball 2. Further, a feeding means 10 is provided for moving the pusher 9 to pressure feed the small diameter ball 2 into the workpiece 8, and the pusher 9 is supported between the feeding means 10 and the pusher 9. A slider 11 is provided.

The operation of the conventional first ball supply device configured as described above will be described below. First, as shown in FIG. 7, a plurality of small-diameter balls 2 are guided and aligned in a row in a row by a guide 1, and are in a state of being pressed in the direction of arrow A. Here, the switching valve 5 is normally "
It is in the “open” state, and the suction pad 4 is in the “suction” state via the supporting means 6 by the vacuum supply source 6.
When the suction pad 4 is brought close to the leading small-diameter ball 2 by means of a worker's hand or the like (not shown), the small-diameter ball 2 can be adsorbed if the small-diameter ball 2 has an adsorbing force greater than its own weight. It becomes possible to carry in the direction of B.

Next, as shown in FIG. 8, when the small-diameter ball 2 is conveyed in the direction of arrow C together with the suction pad 4 and is placed on the inlet of the workpiece 8, the switching valve 5 is closed. The negative pressure in the pipe is opened to the atmosphere and becomes atmospheric pressure, and the small-diameter ball 2 is separated from the suction pad 4. And arrow D
The suction pad 4 is retracted in the direction of.

Further, as shown in FIG. 9, the pusher 9 moves in the direction of arrow E so that the small diameter ball 2 placed on the workpiece 8 is pressed and passed in the direction of arrow E. Since the contact surface of is a cone, the small-diameter ball 2 is pressed while aligning to complete the ball burnishing.

FIG. 10 is a vertical cross-sectional view of a second conventional ball supply device, showing a state in which the push head is contracted. In FIG. 10, a large number of small balls 22 are stored in a funnel-shaped ball hopper 21. Further, a moving means (not shown) for moving / rotating the ball hopper 21 in the directions of the arrow F and the arrow G is provided outside the pipe portion. Further, a guide pipe 23 through which the small-diameter balls 22 can pass is vertically extended and fixed to the center of the ball hopper 21,
Reference numeral 21 is a guide 24 which is pivotally supported on a vertical portion of the guide pipe 23. The upper end of this guide pipe 23 is obliquely cut. Further, the lower end of the vertical portion of the guide pipe 23 is branched into an inverted T shape inclined by an angle θ, and a push head 25 and a cylinder 26 for expanding and contracting the push head 25 are arranged at the lower end of the one branch. It is set up. The other end of the branch is curved and opens downward. This guide pipe
A workpiece 28 to be ball burnished is supported and placed near the lower part of the opening of 23 so as to fit on the fixing jig 27.

The operation of the conventional second ball supply device configured as described above will be described below. First, a large number of small balls 22 are stored in the ball hopper 21. While the ball hopper 21 is reciprocated in the direction of arrow F by the moving means (not shown) of the ball hopper 21,
When rotated in the direction of arrow G, the small-diameter balls 22 accumulated in the ball hopper 21 are agitated, and the small-diameter balls 22 are accidentally mixed.
Are guided in the direction of the arrow H and sequentially enter the guide pipe 23, and are aligned in a row in a row and are accumulated from the branched portion. At this time, the small ball 22 at the top is
It has fallen in the pipe of No. 2 and has reached a branch point α, and is guided to the side of the push head 25 that is inclined downward by an angle θ from the horizontal direction, and comes into contact with the push head 25 to stop. At this time, the push head 25 is in a contracted state. If the maximum gap β between the leading small diameter ball 22 and the inner diameter of the guide pipe 23 is sufficiently smaller than the diameter of the small diameter ball 22, the next small diameter ball 22 can be prevented from falling.

Next, when the cylinder 26 is actuated and the push head 25 extends in the direction of arrow I, the small diameter ball 22 is guided by the branch passage of the guide pipe 23, and the inlet on the work piece 28 at the target position. Calm down. Then, if the guide pipe 23 can be relatively retracted from the workpiece 28, the ball burnishing can be completed by the same operation as in FIG. By repeating the above operation, a ball supply means for supplying balls one by one is established.

[0013]

However, in the above-mentioned first conventional ball supply device, when the diameter of the small diameter ball 2 becomes smaller, the pad diameter of the suction pad 4 becomes smaller and the suction force becomes insufficient. If raised, the inertial force will be lost, and the small diameter ball 2 cannot be conveyed. Also, the workpiece 8
If the difference in diameter between the inlet and the small-diameter ball 2 is large, the small-diameter ball 2 does not sit well, and the high-speed stable supply operation of the small-diameter ball 2 cannot be obtained.

Further, in the above-mentioned second conventional ball supply device, it is difficult to set the inclination angle θ at the branch point of the guide pipe 23 and to control the size of the maximum clearance β, and therefore the leading small diameter ball
When the angle formed by the common tangent line of 22 and the next small-diameter ball 22 and the common tangent line of the guide pipe 23 and the small-diameter ball 22 becomes an acute angle from a certain angle, the frictional force of the small-diameter ball 22 remarkably increases and the small-diameter ball 22 There is a problem that the stable separation function of the small-diameter ball 22 is likely to be impaired, such as when the ball is locked.

The present invention solves the above-mentioned conventional problems, and separates small balls one by one and supplies them to a workpiece with high speed and stable operation to realize automation of ball burnishing. The purpose is to provide a device.

[0016]

In order to solve the above problems, a ball supply device of the present invention comprises a ball tank capable of accumulating and supplying a large number of small balls, and a first through hole for guiding the small balls. A fixed guide having; a first tube provided between the bottom of the ball tank and the first through hole of the fixed guide to guide the small diameter ball from the ball tank to the first through hole; A slider formed by penetrating in the thickness direction a second through hole having a thickness equal to the diameter of the small diameter ball and having a diameter slightly larger than the diameter of the first through hole; A third through hole having a diameter slightly larger than the diameter of the second through hole is formed at the second position except the first position where the first through hole and the second through hole overlap, and at least the above Between the first position and the second position, the first A support guide slidably supporting the slider on a surface opposite to the surface of the fixed guide to which a tube is connected, and a second through hole of the slider are provided between the first position and the second position. And a moving means for moving.

Further, in the ball tank of the ball supply device of the present invention, a conical recess is provided on the bottom surface of the ball tank, and a fourth penetrating hole having a diameter slightly larger than the ball diameter is provided at the center of the recess. The configuration is such that a mortar-shaped guide bottom having holes is provided.

Further, in addition to the above-mentioned structure, the ball supply device of the present invention has a screw-like or half-moon-shaped agitating member having a screw shape or a half-moon shape in the vicinity of the fourth through hole for guiding the small diameter ball to the first tube. Is provided.

Further, in addition to the above structure, the ball supply device of the present invention comprises the first tube made of a resin material, the small diameter ball made of a metal material, and the detector for detecting the small diameter ball having the first structure. And a control member which is provided on the tube and drives the stirring member until the detector detects the small-diameter ball and counts a delay for a certain period of time until the small-diameter ball is detected.

Further, in the fixed guide in the ball supply device of the present invention, at the second position where the second through hole and the third through hole overlap, a fifth guide having a diameter significantly smaller than the diameter of the small diameter ball is provided. Through hole is formed, and the fixed guide is a fixed guide with an air shot capable of supplying compressed air to the fifth through hole from the outside.

Further, in addition to the above structure, the ball supply device of the present invention is provided with a sixth through hole for leaking the air jetted from the fifth through hole in the fixed guide with air shot or the slider. .

Further, in addition to the above structure, the ball supply device of the present invention is provided with a truncated cone-shaped recess having a diameter larger and smaller than the diameter of the small diameter ball, and the truncated cone-shaped recess has a radial direction. A plurality of bases, a leaf spring that supports the base so as to allow the small-diameter balls to pass therethrough, and a third through-hole of a support guide to guide the small-diameter balls into the truncated cone-shaped recesses. And a pressing member that presses the small-diameter ball guided in the truncated cone-shaped recess to extrude the small-diameter ball from the die and supply it to the workpiece.

[0023]

With the above construction, by tapering the bottom surface in the ball tank, the small diameter balls remaining in the ball tank are concentrated in the fourth through hole in the central portion to reduce the remaining number. further,
By stirring the central portion of the ball tank with the stirring member, the dropping of the small diameter ball into the fourth through hole is promoted. On the other hand, when the small balls collide due to the stirring by the stirring member and the small balls are damaged,
In order to reduce the stirring frequency, if the small-diameter balls are accumulated in the first tube, it is detected that the flow of the small-diameter balls is stopped for a certain period of time, which is the detector, and the agitating member is activated to activate the small-diameter balls. By stopping the operation of the stirring member after passing through, the small-diameter balls are less damaged.

Further, the head of the small-diameter ball is stopped by the support guide, and the head of the small-diameter ball is in the second through hole of the slider because the thickness of the slider is equal to the thickness of the ball diameter. Then, when the slider is moved from the first position to the second position by the moving means, only one small-diameter ball moves in parallel, and the second through hole of the slider and the third through hole of the support guide overlap each other. At the second position, it will fall through the third through hole and will be guided by the second tube.

Here, when the small-diameter balls are in a state where viscous lubricating oil or the like adheres to them for rust prevention or the like, the balls do not fall by their own weight due to the viscosity and surface tension inside the slider and the support guide. In order to avoid this problem, it is preferable to use a fixed guide with an air shot that forcibly pressure-feeds a small diameter ball with compressed air at a second position where the second through hole of the slider and the third through hole of the support guide overlap. However, at this time, if the compressed air becomes a turbulent flow near the second through hole of the slider and the buoyancy force that exceeds the weight of the small diameter ball acts, the small diameter ball may not drop, so the fixed guide with air shot or the slider. By providing a sixth through hole for leaking buoyancy, the falling of the small diameter ball is promoted.

Finally, if a base that can be opened and closed is provided near the entrance of the workpiece, it becomes possible to stably hold the small diameter balls.
Further, since the pressing member pushes the small-diameter ball guided in the truncated cone-shaped recess from the die and supplies it to the workpiece,
As in the conventional case, the retracting operation of the base is not necessary, and the device can be operated at high speed.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a main part of a ball supply / unloading portion in a ball supply device according to an embodiment of the present invention. In FIG. 1, a ball tank bottom 31 is provided with a conical recess 33a, which is a conical recess, on the upper surface thereof so that a small-diameter ball 32 made of metal is stored therein, and the small-diameter ball 32 is formed in the center of the conical recess 33. A fourth through hole 34 having a diameter slightly larger than the diameter forms a mortar-shaped guide bottom surface 33b penetrating toward the back surface. A convex portion 35 is formed in the center of the back surface of the ball tank bottom 31. Further, the base 36 is formed with a hole 37 to be fitted into the convex portion 35 of the ball tank bottom 31,
The convex portion 35 of the ball tank bottom 31 is fitted into this hole 37, and the ball tank bottom 31 is placed and fixed. In addition, the cover 38
Has a hole at the center of its upper surface and covers the ball tank bottom 31 from above. Above ball tank bottom 31, base 36
The cover 38 constitutes a ball tank 39.
A motor 40 is placed and fixed on a cover 38 of the ball tank 39, and a stirring rod 41 is attached to a motor shaft that penetrates a hole on the upper surface of the cover 38. The tip shape of the stirring rod 41 is formed in a taper shape so as to match the central portion of the guide bottom surface 33b, and has a partial notch so as to avoid the entrance of the fourth through hole 34, and has a half-moon shape in cross section. Is configured.

One end of the substantially L-shaped bracket 42 is fixed to the bottom surface of the base 36, and the other end of the bracket 42 extending in the vertical direction is fixed to one end of the substantially L-shaped fixed guide 43.
The fixed guide 43 is held horizontally. This fixed guide 43
A joint 44 is provided on the surface extending in the horizontal direction of
The joint 45 also has a fourth through hole 34 in the convex portion 35 of the ball tank bottom 31.
It is provided according to. A first tube 46 made of a resin material is provided so as to connect these joints 44 and 45, and the small diameter ball 32 is guided through the joint 45, the first tube 46 and the joint 44. Further, one end of a substantially L-shaped bracket 47 is fixed to a substantially central portion of a surface of the bracket 42 that extends in the vertical direction, and the other end extends in the horizontal direction. A ball detector 48 is fixed in the horizontal direction on the surface of the bracket 47 extending in the horizontal direction. The first tube 46 is penetrated through the hole of the ball detector 48, and the presence or absence of the small diameter ball 32 in the first tube 46 penetrating the ball detector 48 is detected.
Further, the control device 49 to which the ball detector 48 is connected is connected to the motor 40, and a small-diameter ball is provided by the delay function of a certain time.
The configuration is such that the start and stop of the motor 40 are controlled according to the detection of the presence or absence of 32.

Further, the fixed guide 43 is provided with a first through hole 43a for guiding the small diameter ball 32 through the joint 44, and the lower surface of the fixed guide 43 is provided with a support guide 50 and a slider 51. Is attached so as to be horizontally slidable between the lower surface of the fixed guide 43 and the support guide 50. The slider 51 has a second through hole 51a slightly larger than the first through hole 43a. Further, the support guide 50 has a third through hole 50a having a diameter slightly larger than that of the second through hole 51a at a position where the first and second through holes 43a and 51a do not overlap each other. In addition, the fixed guide 43
One end of a substantially L-shaped bracket 52 is fixed to the upper end of the, and a cylinder 53 is attached to the other end of the vertically extending bracket 52 in the horizontal direction, and the end of the expanding and contracting cylinder shaft is The first through hole 43a and the second through hole 51a are fixed to one end of the slider 51, and the cylinder shaft expands and contracts.
The slider 51 is moved and positioned between a first position in which the first through hole 51a and a second position in which the second through hole 51a and the third through hole 50a meet. Here, the thickness of the slider 51 is equal to the diameter of the small diameter ball 32.

FIG. 2a is a longitudinal sectional view of a main part of the ball supply tip portion in the ball supply device of FIG. 1, and FIG. 2b is a side view of the main part. In FIG. 2, the fixed guide 43 is
A fifth through hole 43b having a diameter significantly smaller than the diameter of the small diameter ball 32 is formed so as to be centered on the through hole 50a, and the compressed air source 54 and the fifth through hole 43b are connected via a tube 55. It is a fixed guide with an air shot. Further, the slider 51 has a through hole 51b through which the compressed air ejected from the fifth through hole 43b leaks.
A slider with a leak hole is formed near the sliding surface of 51. Further, the tube 56 that is opened so as to be aligned with the center of the through hole 50a is inclined obliquely downward so that the small-diameter ball 32 that comes out of the through hole 50a of the support guide 50 is placed on the fixing jig 57. Guide to the vicinity of the insertion part of the work piece 58. At the lower end of this tube 56, there is a truncated conical recess having a diameter that is appropriately larger and smaller than the diameter of the small diameter ball 32.
59 are provided. The tubular body 60 supports leaf springs 61a and 61b, which will be described later with reference to FIG. 3, and is connected to the lower end of the second tube 56. The pusher 62 penetrates the tubular body 60 and is set. The small-diameter balls 32 are pushed out against the workpiece 58.

FIG. 3 is a block diagram of the tapered recessed portion 59 in the ball supply device of FIG. 2, in which a shows a state where the small diameter ball 32 is set in the tapered recessed portion 59, and b shows the small diameter ball 32 is tapered. The state of being pushed out from the concave portion 59 is shown. In FIG. 3, the tapered recessed portion 59 is divided into two dies 63a and 63b in the radial direction, and the dies 63a and 63b are fixed to the respective tips to make the dies 63a and 63b.
It is composed of leaf springs 61a and 61b that urge b to the inside and support the bases 63a and 63b so as to be openable and closable.

The operation of the ball supply device configured as described above will be described below. First, a large number of small balls 32 are put in the conical recess 33 of the ball tank bottom 31 inside the ball tank 39. Then small ball 32
Are guided by the tube 46 and drop one by one. Since the cylinder 53 is in the retracted state in the state shown in FIG. 1, the small diameter ball 32 is inserted to the second through hole 51a of the slider 51, and the leading small diameter ball 32 is stopped at the sliding inner surface of the support guide 50. Thus, as shown in FIG. 1, a small diameter ball
Numerals 32 are arranged in a row in a row with the sliding surface of the support guide 50 at the front.

Next, as shown in FIG. 4, when the cylinder 53 moves the slider 51 in the direction of arrow J, the small diameter ball 32
Is guided by the second through hole 51a and moves, and the third through hole 50a
It falls in the direction of arrow K at the second position of a.

Further, as shown in FIG. 5, when the cylinder 53 moves the slider 51 in the direction of the arrow M, at the first position where the first through hole 43a and the second through hole 51a overlap, The small diameter balls 32 are inserted into the second through holes 51a, and the small diameter balls 32 inside the tube 46 are fed one by one in the direction of arrow N.

At this time, a small diameter ball is also provided in the guide bottom surface 33b.
32 may remain, and in order to reduce the number of remaining small diameter balls 32, the upper surface of the ball tank bottom 31 is formed into a conical mortar shape, and a fourth through hole slightly larger than the small diameter balls 32.
34. Further, as shown in FIG. 1, by stirring the small diameter balls 32 remaining near the fourth through hole 34 with the stirring rod 41, the probability that the small diameter balls 32 pass through the fourth through hole 34 is increased. Is preferred.

When the small balls 32 in the tube 46 are reduced to the state shown in FIG. 5, the tube 46 is made of a resin material,
If the small ball 32 is made of a metal material, the ball detector 48 capable of detecting metal detects "absence" of the small ball 32, and the control device 49
Then, the timer waits for an allowable time, and if the "no" state continues, the motor 40 is driven. As a result, as shown in FIG. 6, the stirring rod 41 rotates in the direction of the arrow P and the small-diameter balls
32 is agitated, and these small diameter balls 32 drop in the direction of arrow Q and are guided to the tube 46. And the ball detector 48
Detects "present" and stops the motor 40 via the control device 49. That is, the control device 49 counts the delay of a certain time by the timer by the non-detection signal of "absence" from the ball detector 48 and drives the stirring rod 41 until the detection signal of "present" is present. In this way, scratches and dents on the small diameter balls 32 due to excessive stirring are prevented.

Further, as shown in FIG. 2, first, the compressed air discharged from the fifth through hole 43b of the fixed guide 43 with air shot acts on the small diameter ball 32, and the small diameter ball 32 passes through the through hole 50a. It flows in the direction of arrow R, passes through the tube 56, is inserted into the caps 63a and 63b, and is set. At this time, depending on the difference in inner diameter between the small diameter ball 32 and the through hole 51a, buoyancy is generated in the small diameter ball 32 due to the pressure relationship supplied from the compressed air source 54 in the direction of arrow S, and the light small diameter ball 32 may not fall. . Therefore, by using the slider 51 with the leak hole, the flow velocity of the compressed air is controlled by the arrow T at the sixth through hole 51b.
It leaks in the direction to reduce the buoyancy. As a result, the lightweight small-diameter ball 32 can be more reliably pumped.

Further, as shown in FIG. 3, the small-diameter ball 32 which is passed through the tube 56 and held by the caps 63a and 63b has leaf springs 61a and 61b which cannot be opened and closed by its own weight.
By pushing out the small diameter ball 32 in the direction of arrow U, the leaf springs 61a, 61b are bent in the direction of arrow W, and finally the small diameter ball 32 is removed from the mouthpieces 63a, 63b and is inserted into the workpiece 58 at the same time. .

In this way, the fixed guide 43 is provided with the fifth through hole 43b as a compressed air supply hole, and the slider is also provided.
By providing a leak hole 51b in 51, and further supporting the tapered recessed caps 63a, 63b by the leaf springs 61a, 61b, stable supply of small balls 32 one by one,
Small diameter balls 32 as before for insertion into the work piece 58
It is possible to realize high-speed supply without retracting the guide member.

Although the bases 63a and 63b are cut into two pieces in this embodiment, they may be cut into a large number. Further, although the fixed guide 43 is a fixed guide with an air shot and the leak hole 51b is provided in the slider 51, the leak hole may be provided on the fixed guide 43 side. Further, in this embodiment, the first tube 46
In the vicinity of the fourth through hole 34 for guiding the small diameter ball 32, a rotatable stirring rod 41 having a half-moon shape in cross section is provided. However, the stirring member may have a rotatable screw shape or the like. The swingable structure may have a half-moon shape or a screw shape in cross section.

[0041]

As described above, according to the present invention, the small diameter ball is held in the second through hole of the slider having the same thickness as the diameter of the small diameter ball, and the first through hole of the first through hole is held. From the position to the second position of the third through hole to take out,
1 small ball for supplying to ball burnish etc.
It is possible to automatically supply each piece at high speed without damage.

Further, a conical recess is provided on the bottom surface, and a ball tank having a mortar-shaped guide bottom surface having a fourth through hole having a diameter slightly larger than the ball diameter is provided in the central portion thereof, so that a small diameter is provided. The number of balls remaining in the ball tank can be reduced.

Further, since a rotating or swinging stirring member having a screw-shaped or half-moon shaped cross section is provided in the vicinity of the fourth through hole of the ball tank, the small-diameter ball in the ball tank is agitated to obtain the small-diameter ball. It is possible to promote a stable supply of.

Further, since the detector detects whether or not the small-diameter balls of the metal material have passed, and counts the delay of a certain time due to the non-detection of the small-diameter balls, the stirring member is driven until it is detected. It is possible to improve quality by reducing scratches and dents.

Further, since the fixed guide is an air shot fixed guide, foreign matters adhering to the small-diameter balls can be cleaned and forced pressure feeding can be realized, and more stable ball transfer can be realized.

Furthermore, by providing a sixth through hole in the fixed guide with the air shot or the slider near the sliding surface of the fixed guide with the air shot and for leaking the air jetted from the fifth through hole, The buoyancy at the time of air shot can exert the effect even when the lightweight small diameter ball does not fall.

Furthermore, since the small diameter ball guided in the truncated cone-shaped recess is pressed by the pressing member through the second tube to push the small diameter ball from the die and guide it to the work piece, the conventional method is used. In addition, the automatic supply can be speeded up without retracting the mouthpiece every time, and various effects can be exhibited, which contributes to automation of the ball burnish.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a ball supply / unloading section in a ball supply device according to an embodiment of the present invention.

2 is a longitudinal sectional view of a main part of a ball supply tip portion in the ball supply device of FIG. 1, and b is a right side view of a part of the ball supply tip portion in the ball supply device of FIG.

FIG. 3A is a partially enlarged perspective view showing a state where a small diameter ball is set in a mouthpiece portion. FIG. 3B is a locally enlarged perspective view showing a state where a small diameter ball is pushed out from the mouthpiece portion.

FIG. 4 is a vertical cross-sectional view showing a ball supply / unloading operation state in the ball supply device of FIG.

5 is a vertical cross-sectional view showing a small-diameter ball non-detection operation state in the ball supply device of FIG.

6 is a longitudinal sectional view showing a small diameter ball stirring operation state in the ball supply device of FIG.

FIG. 7 is a functional diagram of a ball removing operation in the conventional first ball supply device.

FIG. 8 is a functional diagram of an operation of placing a small diameter ball on a workpiece in the conventional first ball supply device.

FIG. 9 is a functional diagram including a ball burnishing operation in a conventional ball supply device.

FIG. 10 is a vertical sectional view of a conventional second ball supply device.

[Explanation of symbols]

 31 Ball tank bottom 32 Small diameter ball 33a Conical recess 33b Guide bottom surface 34 Fourth through hole 39 Ball tank 40 Motor 41 Stirring rod 43 Fixed guide 43a First through hole 43b Fifth through hole 46 First tube 48 Ball Detector 49 Control device 50 Support guide 50a Third through hole 51 Slider 51a Second through hole 51b Sixth through hole 53 Cylinder 54 Compressed air source 56 Second tube 59 Tapered recess 61a, 61b Leaf spring 62 Pushers 63a, 63b Mouthpiece

Claims (7)

[Claims] 1. A ball tank capable of accumulating and supplying a large number of small balls, a fixed guide having a first through hole for guiding the small balls, a bottom of the ball tank and a first of the fixed guides. A first tube provided between the through holes for guiding the small diameter ball from the ball tank to the first through hole; and a first tube having a thickness equal to the diameter of the small diameter ball, A slider formed by penetrating in the thickness direction a second through hole having a diameter slightly larger than that of the first through hole except for the first position where the first through hole and the second through hole overlap. A third through hole having a diameter slightly larger than the diameter of the second through hole is formed at the position 2, and the first through hole is formed at least between the first position and the second position.
Support guide for slidably supporting the slider on a surface opposite to the surface of the fixed guide to which the tube is connected, and a second through hole of the slider for the first position and the second position. A ball supply device having a moving means for moving between them. 2. The ball tank has a mortar-shaped guide having a conical recess on the bottom surface of the ball tank, and a fourth through hole having a diameter slightly larger than the ball diameter at the center of the recess. The ball supply device according to claim 1, further comprising a bottom surface. 3. The ball supply device according to claim 2, wherein the first tube is provided with a stirring member having a screw shape or a half-moon shape in the vicinity of the fourth through hole for guiding the small diameter ball and capable of rotating or swinging. 4. The first tube is made of a resin material, the small diameter balls are made of a metal material, and a detector for detecting the small diameter balls is provided on the first tube, and the detector detects the small diameter balls. The ball supply device according to claim 3, further comprising a control member that drives the stirring member until the small-diameter ball is detected after counting a delay of a certain time when the ball is not detected. 5. A fifth through hole having a diameter remarkably smaller than the diameter of the small diameter ball is formed in the fixed guide at a second position where the second through hole and the third through hole overlap, The ball supply device according to claim 1, wherein the fixed guide is a fixed guide with an air shot capable of supplying compressed air from the outside to the fifth through hole. 6. The ball supply device according to claim 5, wherein a sixth through hole for leaking air ejected from the fifth through hole is provided in the fixed guide with the air shot or the slider. 7. A base having a truncated cone-shaped recess having a diameter larger than and smaller than the diameter of a small-diameter ball and divided into a plurality of parts in the radial direction of the truncated cone-shaped recess, and the base. A leaf spring that supports the small-diameter ball so that it can be opened and closed, a second tube that guides the small-diameter ball from the third through hole of the support guide to the truncated cone-shaped recess, and the truncated cone-shaped recess The ball supply device according to claim 1, further comprising a pressing member that presses the small-diameter ball guided by the nozzle to extrude the small-diameter ball from the die and supply the small-sized ball to a workpiece.