JPH09314448A - Workpiece automatic feeder for spring end surface grinding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To replace a rotary work table with another very easily by providing a movable base part as a supporting base for a workpiece feeding means so as to be reciprocated around the rotary work table along a guide rail. SOLUTION: A workpiece feeding means 4 is attached to a movable base part 5 placed on a fixed guide rail 6. The guide rail 6 is formed to be circular- arc concentric to the rotational center of a rotary work table T around the same and the movable part 5 is freely reciprocated around the rotary work table T along the circular-arc. The movable base part 5 and the guide rail 6 are connected to each other by, for example a driving means 8 as a fluid pressure cylinder, and the movable base part 5 is reciprocated on the guide rail 6 by the elongation/contraction of the driving means 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work automatic supply device for reliably and automatically supplying a coil spring to a spring end surface grinding device for automatically grinding the end surface of a coil spring.

[0002]

2. Description of the Related Art A spring end surface grinding device for automatically grinding the end surface of a coil spring includes a rotary work table having a receiving hole for holding the coil spring and a grinder installed above or below a circular orbit of the receiving hole. The coil spring is held by the receiving hole, and the end surface is ground by the grinder while moving the coil spring on the rotary work table. As a device for automatically supplying a coil spring to such a spring end surface grinding device, for example, Japanese Patent Laid-Open No. 53-12219.
There is number 4. This automatic work supply device includes a work supply means for supplying a coil spring to a receiving hole, a rotatable swingable arm type movable base portion that serves as a support base of the work supply means, and a rotary work table outer periphery. Engaging means for connecting the swing arm type movable base portion to the rotating work table by engaging with the protruding engagement pin, and operating the engaging means to rotate the swing arm type movable base portion. The structure is such that the coil spring is inserted into the receiving hole by the work supply means while synchronizing with the table.

[0003]

SUMMARY OF THE INVENTION A spring end surface grinding device is
It is necessary to replace the rotary work table according to the diameter of the coil spring. However, in the above-described conventional automatic work supply device, since the swing arm type movable base portion which is the support base of the work supply means is pivotally attached to the rotary shaft of the rotary work table, the rotary work table is replaced every time. Since it is necessary to remove the swinging arm type movable table part from the rotating shaft one by one, replacement work of the rotating work table is significantly hindered. Also, if most of the rotating work table is covered by the cover due to the installation condition of the spring end surface grinding device, the cover must be removed one by one when installing the automatic work supply device, and the workability is poor. In some cases, it cannot be installed because the mounting space for the movable arm type movable base cannot be secured. Furthermore, since the swing arm type movable base and the work supply means are located at the position where the receiving hole of the rotary work table is closed, the coil spring is manually supplied when the work automatic supply device is stopped due to a trouble. There were problems such as difficulty.

Further, the above-mentioned conventional work automatic supply device is
When the engaging means engages with the engaging pin, the engaging means is engaged with the engaging pin on the outer periphery of the rotating work table, and the swinging arm movable base is driven by the power of the rotating work table. Since an impact is generated and the engaging means and the engaging pin rub strongly against each other, they are easily affected by wear and deformation, and there is a possibility that accuracy may be reduced in a short period of time.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and is a work supply means for supplying a coil spring to the receiving hole, and a movable movable base portion serving as a support base of the work supply means. And engaging means for temporarily engaging the engaged portion of the rotary work table to connect the movable base portion to the rotary work table, and activating the engaging means to move the movable base portion to the rotary work table. In a work automatic supply device for a spring end surface grinding device, in which a coil spring is inserted into the receiving hole by a work supply means while synchronizing with each other, an arc shape concentric with the rotation center of the rotary work table is provided around the rotary work table. Provided is an automatic work supply device for a spring end surface grinding device, in which a guide rail is fixedly installed and the movable table portion is reciprocally mounted on the guide rail.

In the above-mentioned automatic work supply device, since the movable base portion which is the support base of the work supply means reciprocates around the rotary work table along the guide rail, the conventional swinging motion from the rotary shaft of the rotary work table. The arm type movable base can be removed.

Preferably, driving means for moving the movable base portion is independently installed, and the driving means causes the engaging means to follow the engaged portion of the preceding rotary work table. The engagement means may be engaged on the rear side of the part. By doing so, there is almost no impact when the engaged portion and the engaging means engage with each other, and the force acting between the engaged portion and the engaging means is small, so that the influence of wear or deformation is almost eliminated. It can be operated accurately for a long time without receiving it.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The spring end surface grinding device M is a rotating work table T having a disk shape that horizontally rotates about a vertical rotation axis (not shown) and having receiving holes H, H ... For holding a coil spring W that is a work. , And a grinder (not shown) installed above and below the circular path of the receiving hole H. Then, the coil spring W is put into the receiving hole H and held, and the end surface is ground by the grinder while moving the coil spring W on the rotary work table T.

The receiving holes H of the rotary work table T are set as two sets arranged in the radial direction (a set of three or more may be set in some cases), and a large number of them are arranged at equal intervals in the circumferential direction. ing. Further, a fixed circular base plate B is installed immediately below the rotary work table T at an appropriate interval, and the bottom of the receiving hole H is received by the circular base plate B. Further, on the outer periphery of the rotary work table T, an engagement pin P serving as an engaged portion is projected on an extension line passing through the rotation center of the rotary work table T and the center of the receiving hole H.

Next, the work automatic supply device WM comprises a supply unit 1 for continuously supplying coil springs W arranged in a line.
A gap adjusting means 2 for widening the gap between the two coil springs W according to the gap between the receiving holes H, H, and a clamping means 3 for transferring the coil spring W from the supply part 1 to the gap adjusting means 2.
The work supply means 4 that clamps the coil spring W in the space adjusting means 2 and inserts it into the receiving hole H, the movable movable base portion 5 that serves as a support base of the work supply means 4, and the movable base portion 5 The guide rail 6 guides the moving direction, and the engaging means 7 that connects the rotary work table T and the movable base portion 5 together.

The supply unit 1 has a gutter shape having an upward U-shape, and has coil springs W arranged in a row in a row.
It stops by hitting the stop plate 1a at the end portion.

The clamp means 3 has a clamp piece 3a sandwiching the upper part of the coil spring W, and the clamp piece 3a is driven by a driving device 3b such as a fluid pressure cylinder (not shown).
Move up, down, left and right in. The clamp means 3 has two sets of clamp pieces 3a, 3a and can clamp two adjacent coil springs W, W at one time.

The interval adjusting means 2 are arranged side by side on the supply section 1 as shown in FIGS. The space adjusting means 2 includes a fixed base portion 2a, a fixed sliding bed 2b provided on the base portion 2a, and the sliding bed 2b.
A slider 2c that slides on and a drive device 2d such as a fluid pressure cylinder that linearly reciprocates the slider 2c.
And consisting of Guide plates 2e having an inverted L-shaped cross section are fixed to both sides of the sliding bed 2b. The guide plate 2e has a positioning step portion 2k on its upper surface for determining a stop position of a spring receiving member 2h described later.
Are formed.

As shown in FIG. 6, the slider 2c includes a slider main body 2f and two spring receiving members 2g, 2h in front of the slider main body 2f and arranged in the traveling direction.
It is composed of and. Two spring receiving members 2g, 2h
Is a configuration in which an upward receiving shaft 2p is projectingly provided on an upper surface of a block 2n having grooves 2m on both sides.
The guide rail portion 2q formed in the first half of f has the groove 2m.
Is fitted and attached to the front spring receiving member 2g.
Is fixed to the screw hole 2r of the guide rail portion 2q through the bolt 2s, and the rear spring receiving member 2h can slide only in the front-rear direction.

Further, a spring locking member 2t is fixed to the upper surface of the block 2n of the spring receiving member 2h on the rear side, and the spring locking member 2t and the spring locking member fixed to approximately the center of the rear half of the slider main body 2f. A coil spring 2v is stretched between the piece 2u and the spring receiving member 2h is always pulled backward. Then, the coil spring 2v
The spring receiving member 2h pulled by the slider main body 2f
The spring locking tool 2t hits the L-shaped metal fitting 2w standing upright in the approximate center of the position and stops. In this state, the distance between the spring receiving members 2g and 2h is equal to the distance between the two receiving holes H. In addition, actually, the adjusting screw 2 is attached to the L-shaped bracket 2w.
x is provided so that the spring locking tool 2t abuts on the tip of the adjusting screw 2x. Therefore, the stop position of the spring receiving member 2h can be finely adjusted by advancing and retracting the adjusting screw 2x. Related slider 2
In c, the slider main body 2f can slide on the sliding bed 2b only in the front-rear direction by engaging the guide plate 2e of the sliding bed 2b.

On the other hand, the drive device 2 for moving the slider 2c
d is a fixed mounting piece 2j protruding from the rear end of the sliding bed 2b.
And a L-shaped metal fitting 2w of a slider 2c, wherein a cylinder body 2y of the driving device 2d is mounted on a fixed mounting piece 2j, and a rod 2z is mounted on the L-shaped metal fitting 2w. Therefore, the slider 2c is linearly reciprocated on the sliding bed 2b by the expansion and contraction of the rod 2z. Normally, the rod 2z of the driving device 2d is in a contracted state and the slider 2c is in the retracted position, but the spring receiving member 2h hits the positioning step 2k on the upper surface of the guide plate 2e and is positioned separately, so that the two springs Receiving member 2g,
2h is connected without a gap.

Next, the work supply means 4 will be described. As shown in FIGS. 1, 2, and 7, the work supply means 4 includes a clamp unit 4a for the coil spring W and a lifting device 4b for vertically moving the clamp unit 4a. The clamp unit 4a has a vertical mounting base 4c.
And the two power units 4d and 4d installed on the mounting base 4c.
Clamp pieces 4e, 4e that open and close by the power parts 4d, 4d to sandwich the coil spring W, a supply guide member 4f fixed to the lower end of the power part 4d, and the supply guide member 4f.
And an extrusion device 4h for vertically moving the inverted T-shaped pressing rod 4g. As shown in FIG. 7, the supply guide member 4f is formed by arranging two circular storage chambers 4j in which coil springs W are inserted, and the pushing rod 4g of the pushing device 4h faces the storage chambers 4j. Further, the clamp piece 4e moves in and out of the storage chamber 4j through the side surface notch 4z. The two storage chambers 4j, 4j have a space equal to the space between the receiving holes H, H of the rotary work table T, and the centers of the respective storage chambers 4j, 4j are located right above the circular orbits of the receiving holes H, H. Is set. The pushing rod 4g of the pushing device 4h is attached to the mounting base 4c.
The vertical movement is controlled by the lifting device 4k fixed to the upper surface of the.

On the other hand, an elevating device 4b for vertically moving the clamp unit 4a includes a base frame 4m and the base frame 4m.
The sliding body 4n is slidably attached to the vertical axis m, and the lifting cylinder 4p is interposed between the base frame 4m and the sliding body 4n. The mounting base 4c of the clamp unit 4a is connected to the slide body 4n of the lifting device 4b, and the clamp unit 4a can slide vertically with the slide body 4n.

The work supply means 4 is attached to a movable base portion 5 placed on a fixed guide rail 6.
As shown in FIGS. 2 and 3, the guide rail 6 is formed in a circular arc shape around the rotary work table T and concentric with the rotation center of the rotary work table T. , Is reciprocally movable around the rotary work table T along the arc. In addition, the movable base 5 and the guide rail 6
Are connected by a drive means 8 which is, for example, a fluid pressure cylinder, and the movable base portion 5 reciprocates on the guide rail 6 when the drive means 8 expands and contracts.

Next, the engaging means 7 for connecting the rotary work table T and the movable base portion 5 will be described. Engaging means 7
As shown in FIGS. 1 to 3, is composed of a driving device 7a such as a fluid pressure cylinder fixedly mounted on the movable table portion 5 and an engaging member 7c fixed to a rod 7b of the driving device 7a. . The engagement member 7c also includes a pedestal 7d attached to the rod 7b, an engagement plate 7e that is slidable in the lateral direction with respect to the pedestal 7d, and lateral correction screws 7f mounted on both sides of the pedestal 7d. The position of the engagement plate 7e can be finely adjusted in the lateral direction by rotating the lateral correction screw 7f. The engaging means 7 extends the rod 7b of the drive unit 7a to move the engaging member 7c straight forward toward the rotating work table T, and the engaging plate 7e and the engaging pin P of the rotating work table T.
To contact. Further, the engagement means 7 is positioned so that the center of the storage chamber 4j of the supply guide member 4f and the center of the receiving hole H of the rotary work table T are aligned with the engagement plate 7e in contact with the rear side of the engagement pin P. It is set.

Next, the operation of the work automatic supply device WM will be described. The rotary work table T is shown in FIG.
In FIG. 2, it is rotating at a constant speed in the direction of arrow R. Also,
In the initial state of the work automatic supply device WM, as shown in FIGS. 1 to 3, the clamp means 3 clamps the clamp pieces 3a, 3a.
And waits above the supply unit 1, and the slider 2c of the interval adjusting means 2 is in the retracted position so that the two spring receiving members 2
g and 2h are connected without a gap, the work supply means 4 stands by at the position where the clamp unit 4a is raised, and the engagement means 7
Indicates that the engagement plate 7e is retracted.

Therefore, first, the driving device 3 for the clamp means 3
b is operated to lower the clamp piece 3a, and two adjacent coil springs W, W at the end of the supply unit 1 are simultaneously grasped. Then, after raising the clamp piece 3a, the horizontal rod 3c (see FIG. 1) of the drive device 3b is extended and the coil springs W, W which are grasped are held by the spring receiving members 2g, 2 of the interval adjusting means 2.
The spring bearing member 2 is moved to a position right above h and then downwardly moved.
Coil springs W and W are fitted on the receiving shafts 2p of g and 2h. Then, the clamp means 3 separates the coil springs W, rises, moves laterally, and returns to the initial state.

Next, as shown in FIG. 4A, the gap adjusting means 2 in which the coil springs W, W are mounted on the spring receiving members 2g, 2h extends the rod 2z of the driving device 2d to advance the slider 2c. Let The movement of the slider 2c starts as shown in FIG.
As shown in (b), the spring receiving member 2h is the coil spring 2
Only the spring receiving member 2g moves forward integrally with the slider main body 2f because it does not move while being engaged with the positioning stepped portion 2k of the guide plate 2e by being pulled by v. Eventually, mainly slider 2
When the L-shaped metal fitting 2w of f comes into contact with the spring receiving member 2h, the interval between the spring receiving members 2g and 2h becomes the same as the interval between the receiving holes H and H. Then, the rod 2z of the driving device 2d is further extended to advance the slider 2c, and the spring receiving members 2g and 2h are made to face under the supply guide member 4f of the work supply means 4 as shown in FIG. By the operation up to this point, the two coil springs W, W that have been adjoining each other and staying in the supply unit 1 spread according to the distance between the receiving holes H, H, and the receiving holes H, H. It has moved to the circular orbit of.

Next, the lifting device 4b of the work supply means 4
Is operated to lower the clamp unit 4a, and the coil springs W, W on the spring receiving members 2g, 2h are put into the storage chambers 4j, 4j of the supply guide member 4f. Then, after the coil springs W, W are sandwiched by the clamp pieces 4e, 4e and the clamp unit 4a is raised, the slider 2 of the interval adjusting means 2 is moved.
c is retracted to return to the initial state.

Next, the driving device 7a of the engaging means 7 is operated to extend the rod 7b, and the engaging plate 7e is placed in the intermediate region between the engaging pin P and the engaging pin P as shown by the alternate long and short dash line in FIG.
Then, the rod 8a of the driving means 8 is contracted to move the movable base 5
Is moved in the same direction as the rotary work table T (see arrow R in FIGS. 1 and 2), and the preceding engagement pin P is followed. The speed of the movable base 5 is set to be faster than the speed of the engagement pin P, and the engagement plate 7e engages (contacts) with the rear side of the engagement pin P in an extremely short time. The engagement plate 7e is set so as to come into contact with the engagement pin P with an extremely light force, and the engagement of both does not affect the rotation of the rotary work table T. In this state, since the storage chambers 4j, 4j of the supply guide member 4f and the receiving holes H, H are coaxially opposed to each other, the clamp unit 4a is moved downward to a position before the supply guide member 4f comes into contact with the rotary work table T. After that, the clamp piece 4e is opened and the coil spring W is removed. At the same time, the elevating device 4k of the pushing device 4h is operated to push down the pushing rod 4g.
To move the coil spring W into the receiving hole H securely.
Since the upper surface of the coil spring W is pressed by the pressing rod 4g, the coil spring W does not dance in the receiving hole H.
Therefore, the coil spring W is stable in the receiving hole H, and a supply error such as "the coil spring W rolls over in the receiving hole H" is generated even with respect to the coil spring W having a length shorter than the diameter. Does not occur.

After supplying the coil spring W to the receiving hole H in this manner, the clamp unit 4a rapidly rises, and subsequently the engaging plate 7e of the engaging means 7 retreats and separates from the engaging pin P,
The rod 8a of the driving means 8 extends and the movable base 5 and the work supply means 4 return to the initial state.

After that, the above operation is repeated, and the coil springs W lined up in the supply section 1 are automatically supplied to the receiving holes H. In addition,
As a safety measure in the case where the automatic work supply device WM is stopped due to a trouble, the engaging plate 7e of the engaging means 7 is configured to rotate only when a pressure is applied from the rear side, and the engaging pin P is used to rear It is also possible to rotate and escape when pushed from. Of course, the rotated engagement plate 7e
Is to return to its original position by the elasticity of the spring.

[0028]

According to the automatic work feeding apparatus of the present invention, the movable base portion, which serves as the support base of the work feeding means, reciprocates around the rotary work table along the guide rail, so that the rotary shaft of the rotary work table is removed. The conventional swing arm type movable base section can be eliminated. Therefore, replacement of the rotary work table becomes very easy, and even if the upper surface of the rotary work table is covered with a cover, the rotary work table can be easily installed without removing the cover. It can be installed on the edge grinding machine. Furthermore, since the receiving hole of the rotary work table is not closed, it is possible to promptly switch to the manual work even if the automatic work supply device stops in an emergency.

According to the second aspect of the invention, the driving means causes the engaging means to follow the engaged portion of the preceding rotary work table, and the engaging means is engaged with the rear side of the engaged portion. Therefore, when the engaged portion and the engaging means are engaged with each other, there is almost no impact, and the force acting between the engaged portion and the engaging means is small, so that it is hardly affected by wear or deformation. It has excellent effects such as being able to operate accurately for a long period of time.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of an automatic work supply device.

FIG. 2 is a plan view showing a main part of an automatic work supply device.

FIG. 3 is a vertical cross-sectional view showing a main part of the automatic work supply device.

4 (a) to 4 (c) are schematic vertical sectional views for explaining the operation of the space adjusting means.

FIG. 5 is a perspective view showing a supply unit and a space adjusting unit.

FIG. 6 is an exploded perspective view showing a slider of the space adjusting means.

FIG. 7 is a perspective view showing a part of the clamp unit in section.

[Explanation of symbols]

 M ... Spring end surface grinding device H ... Receiving hole T ... Rotating work table P ... Engagement pin (engaged part) W ... Coil spring WM ... Work automatic supply device 4 ... Work supply means 5 ... Movable table part 6 ... Guide rail 7 ... Engaging means 8 ... Driving means

Claims (2)

[Claims] 1. A rotary work table having a large number of receiving holes, and a grinder installed above or below a circular orbit of the receiving holes, wherein a coil spring is held by the receiving holes and the coil spring is provided by the rotating work table. Attached to a spring end face grinding device that grinds the end face with the grinder while moving the work piece, a work supply means for supplying a coil spring to the receiving hole, and a movable movable support serving as a support base of the work supply means. The rotary work table has a base portion and an engaging means for temporarily engaging the engaged portion of the rotary work table to connect the movable base portion to the rotary work table. In a work automatic supply device for a spring end surface grinding device in which a coil spring is inserted into the receiving hole by a work supply means while synchronizing with the table, a rotary work table is provided around a rotary work table. The rotation center concentric with the circular arc-shaped induction spring end face grinding apparatus for automatic workpiece feeder, characterized by comprising installing said carriage on its guide rail to freely reciprocate with the rails fixed. 2. A driving means for moving the movable table portion is independently installed, and the driving means causes the engaging means to follow the engaged portion of the preceding rotary work table.
The workpiece automatic supply device for a spring end surface grinding apparatus according to claim 1, wherein the engaging means is engaged with the rear side of the engaged portion.