JP3684113B2 - Gripper feed type swing feeding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for feeding a processing material to a press machine. More specifically, the present invention relates to a gripper feed type swing feeding device that allows multiple rows to be removed by sandwiching a material with a grip and feeding a constant amount and swinging the material in multiple steps in the feed direction.
[0002]
[Prior art]
As a prior art, for example, Japanese Patent Publication No. 58-28012 (hereinafter referred to as A publication) as a roller feed type feeding apparatus, or Japanese Patent Publication No. 3-54019 (hereinafter referred to as B) having a description related to a gripper feed type feeding apparatus. Is referred to as a known technique.
Gazette A grips the supply material with a roller and swings the roller gripping body with a cam groove, and Gazette B is a material supply device that does not include a material swinging mechanism.
[0003]
In FIG. 16, a known technique disclosed in A publication includes a feed lever 211 having a roller 213 attached to the other end pivotally supported around a pin 232 planted at one end on the upper surface of the main body, and a groove portion. The groove cam 205 into which the roller 213 is fitted, and the feed lever 211 is engaged with a feed lever 211 at a predetermined position that is adjustable with the feed lever 211 at one end. A feed roller block 209 that passes through and is rotatably fitted to the main body, a pair of feed rollers 223 and 227 provided on the feed roller block, and a shaft of the drive side feed roller 227 and the one-way clutch 219. A grooved cam 214 having an intermediate shaft 229 that is extended and retracted through a universal joint 228 and a mechanism that transmits intermittent rotation to the feed roller 227. The rotation of the groove cam 205 from the single drive source 201 causes the feed roller block 209 to swing intermittently via the feed lever 211, and the rotation of the other groove cam 214 causes a pair of feed rollers to rotate. 223 and 227 are intermittently rotated to transfer the belt-like material in a zigzag manner and continuously press.
[0004]
In the known technique disclosed in B publication, an eccentric pin is provided on a gripper cam fixed to a camshaft that is rotated in synchronization with a central drive large gear so that an eccentric amount can be adjusted, and a rod pivotally attached to the eccentric pin is provided. It is connected to the link lever. The end of the link lever is pivotally connected to a feed block whose material feed amount is determined by a stopper which can slide on the guide rod and adjust its position. The gripper cam faces the cam follower at the end of the L-shaped lever of the parallel link, and the parallel link is biased by a spring in a direction in which the cam follower is always in contact, and further has a gripping tool pivotally supported on the feed block to grip when feeding the material. It is in contact with the tip roller of the gripper lever. The stock check cam juxtaposed to the gripper cam is pivotally supported by the frame of the material feeding device and is in contact with a roller of a stock check lever having a fixture for stopping the feeding of the material when the gripping tool is open. The left and right positions of the stopper are adjusted to determine the feed amount of the material feeder.
[0005]
[Problems to be solved by the invention]
The invention of publication A is an example of a roller feed type oscillating feeding device. In this invention, the material is fed by the rotation of a pair of rollers sandwiching the material. Therefore, due to the influence of dust and oil adhering to the surface of the material and other factors, this type of device is prone to slip between the material and the roller, and the material feed amount is unstable without always delivering a fixed amount of material. It was easy to become.
In addition, for example, a one-way clutch or the like is used as a component of a power transmission mechanism from a drive source so as to rotate the roller intermittently. It was easy for the material feed amount to vary.
Further, since the rotation amount of the roller is changed to the linear feed amount of the material, when changing the material feed amount, the rotation angle of the roller is used. That is, the change in the linear dimension has to be adjusted at this rotational angle, and adjustment of the feed amount has been difficult.
[0006]
The invention of publication B is an example of a press using a gripper mechanism. However, there has never been a gripper feed type feeding device that can swing and feed.
[0007]
The present invention has been made in view of such problems, and the object of the present invention is to connect the belt material holding portion, the belt material feeding portion, and the drive portions of the swing mechanism all with a mechanical configuration. An attempt is made to provide a gripper feed type swing feed device that conducts synchronous motion and has a simple configuration, and a gripper feed type swing feed device that performs overall control by using a fluid pressure actuator and a servo motor together in the drive unit. To do.
[0010]
[Means for Solving the Problems]
  Claim1In the material feeding apparatus for supplying a processing strip into the press machine, the invention provides a grip member for gripping the strip on a plane in the plate thickness direction formed by a grip base and a grip plate facing the grip base, and the grip A feed base for supplying a fixed amount of the band material gripped by the member to the processing site; a feed base drive member provided on the first shaft with a first cam for guiding and positioning the amount of movement of the feed base with a pair of cam followers; While the grip member does not grip the strip, a clamp member that grips the strip in a plane in the plate thickness direction formed by a clamp base and a clamp plate facing the clamp base, and the grip member and the clamp member A material gripper drive member having a second shaft on which a second cam and a third cam having cam surfaces formed so as to reverse the operation, the feed base, the feed base drive member, the clamp member, and the material An oscillating body that supports the holding portion driving member and forms the third shaft, and a third cam that rotates synchronously with the second shaft and oscillates the lever integrated with the third shaft. The first gripping means grips the strip only when the strip is supplied to the swing drive member that swings and drives the third shaft, and the first shaft, the second shaft, and the third shaft. While the rocking body is swung, the feed base feeds the material, and after the feeding is completed, the belt material is clamped by the second gripping means to retract the feed base and the belt material is clamped. Is provided with a transmission mechanism for synchronizing the operation by oscillating the oscillating body so that the band material can be positioned at a predetermined position. It is designed to be lined up.
[0011]
According to the present invention, the feed belt is driven by the second cam of the second shaft connected to the first shaft so as to be gripped by the grip portion, and the constant feed of the strip is performed while the belt is gripped. It is driven by one cam, and is driven by the third cam of the second shaft so that the band member is held by the clamp portion during hole machining at the machining site. Oscillation of the feeding device when machining the multi-row holes in the strip is driven by a third shaft connected to the first shaft. Accordingly, it is easy to connect the first, second, and third shafts to determine the timing of each operation, and since the operation amount is linked to the lift amount of the cam, the positioning accuracy determined by the feed amount and the swing angle is high.
[0012]
  Claim2According to the present invention, the material feeding device is configured by aligning the axis of the first axis, the second axis and the third axis.
  According to the present invention, the drive shafts of the first shaft, the second shaft, and the third shaft are centered on the first shaft, the second shaft is the outer sleeve, and the third shaft is further swung as the outer sleeve. It is to be molded. Therefore, there is an advantage that the entire structure can be made small, and there is no need to worry about looseness due to the use of a universal joint or the like due to external power transmission.
[0013]
  Claim3According to the present invention, there is provided a material feeding apparatus for supplying a processing strip into a press machine, wherein a first gripping means for gripping the strip in a plane in a plate thickness direction during material feeding, and supporting the first gripping means. Opening and closing the material feed base supported so as to be movable in the band feed direction and the grip portion of the first gripping meansAir actuatorThe first driving means and the material feed base are moved forward and backward.Servo motor that drives the ball screwThird driving means, second gripping means for gripping the strip material in a plane in the plate thickness direction when the feed base is retracted, and opening and closing a clamp portion of the second gripping meansAir actuatorThe second drive means, the material feed base, the first drive means, the second drive means, and the third drive means are supported so as to be swingable around a vertical axis passing through the width center of the strip. And a rocking baseServo motorThe opening and closing operation of the fourth driving means, the first gripping means and the second gripping means is such that when one is closed, the other is open, and at the same time or after the closing, the first drive means and the second gripping means are opened. And a control section for controlling the third driving means and the fourth driving means in association with each other after the first driving means and the second driving means are operated.
[0014]
  According to this invention, after the first gripping means is closed and the band material is gripped, the second gripping means is opened (unclamped), the gripping is released, and the third drive means moves the material feed base forward by a predetermined amount to process the band material. 1 pitch. Before opening the first gripping means, the second gripping means is closed to fix (clamp) the band material, and the material feed base is moved backward. In relation to this advance / retreat operation, the predetermined angle base is turned by the fourth drive means at the same time or later to shift the machining line. Control of the driving means is easy, and it is possible to easily cope with changes in the width of the strip, the hole pitch, etc. in a wide range.Since the servo motor is used for the material feed drive and the material swing drive, the feed amount and the swing amount can be arbitrarily changed simply by inputting a set value to the control unit, and the correspondence is further facilitated.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
[Example 1]
Next, the outline of the apparatus configuration of the present invention will be described with reference to FIG.
[0017]
The strip for processing passes through the clamp base 45, the grip base 21 and the strip guide 2 provided on the rocking body, and is sent to the press ram part. The strip is gripped by the grip member of the feed base 12, and after the feed base 12 is fed in the direction of the processing site by the first cam 16, the strip is held by the clamp member, and after the press is completed, the grip of the feed base returned during this time. The feed base 12 is returned to the initial gripping position by the first cam so that the member grips the strip again.
While the band material is clamped by the clamp base 45 configured on the rocking body, the rocking body is synchronized with the shaft around the first shaft 15 that drives the first cam 16 of the feed base 12 and the band material is After positioning by swinging a predetermined angle to the left and right of the center line of the flat surface, a press ram (not shown) acts to complete the pressing operation. The swinging of the swinging body is driven by a fourth cam 61 provided in the gear box 36 with a sleeve 52 having a common axis of the first shaft 15 as an axis.
[0018]
Embodiments of the present invention will be described below with reference to the drawings.
[0019]
[Example 1]
FIG. 1 (a) is a gripper feed type swing feeding device, and is a top view showing the arrangement of a grip member, a clamp member and a feed base for gripping a processing strip, and (b) is a swing of (a). FIG. 2 is a cross-sectional view taken along line AA including each member of FIG. 1 and a swing drive member, FIG. 3 is a cross-sectional view taken along line BB of FIG. 1 including a grip member and a clamp member of the present invention, and FIG. FIG. 5 is a gear train that drives a fourth cam that swings the swinging body, and FIG. 6 is a lever that swings integrally with the swinging body. 2 is a cross-sectional view taken along the line CC of FIG. 2 showing a pressing pin for applying a pressing force, and FIG. 7 is an operation timing chart of the gripper feed type swing feeding device of the present invention.
[0020]
1, 2, and 3, the band 1 in FIG. 1A is fed and positioned in the process of passing the rocking body 11 of the present invention from above in the drawing, and the upper surface is covered with the lid 3. It moves from the covered strip guide 2 to the processing site. (B) has shown the state rock | fluctuated centering | focusing on the 1st axis | shaft 15 when drilling to 3 rows. The feed base 12 and its support member and feed base drive member are configured as an oscillating body. The feed base 12 is slidably supported by a pair of slide bearings 14A and 14B fitted on a pair of support shafts 13A and 13B fixed to a rocking body.
[0021]
The feed base 12 is driven by a first shaft 15 having an axis in a direction perpendicular to a surface formed by both axes of the support shafts 13A and 13B. A first cam 16 that is divided and easily manufactured according to the feed amount of the band material is keyed to the first shaft 15 that is supported by the shaft, contacts the cam surface of the first cam 16, and slides the feed base 12. A pair of cam followers 17 </ b> A and 17 </ b> B that limit the stroke in the direction are provided on the lower surface of the feed base 12. The cam surface of the first cam 16 is always pressed in the traveling direction of the belt member by a pair of springs 18A and 18B fitted to the pair of support shafts 13A and 13B, and is in contact with the cam follower 17A.
[0022]
When the cam follower 17A does not move correctly following the cam surface of the first cam 16 and the feed base 12 does not move in the traveling direction of the belt material, the protrusion of the first cam 16 acts on the cam follower 17B. Thus, the stroke of the feed base 12 is ensured. The first shaft 15 is rotationally driven by a pulley 64 provided at the opposite shaft end portion on which the first cam 16 is fitted.
When three rows of holes are drilled in the strip, the rotation of the press ram and the first shaft 15 is synchronized at 1: 1, and the grip portion and clamp portion described below are decelerated to 1/3 via the intermediate shaft 19. To drive the second shaft 20.
When four or more rows of holes are drilled in the strip, the speed ratio between the shafts is determined according to the hole arrangement and the drilling sequence.
[0023]
Next, the structure of the grip member and the drive member that are fixed to the feed base 12 and hold the strip of the supply material will be described. A grip member that grips the strip with the grip base and the grip plate when the strip is supplied is referred to as a first gripping means.
[0024]
3 and 5, the band material can be clamped between the grip base 21 and the grip plate 28. The grip base 21 is fitted into two collars 23 with springs 22 fitted into the outer diameter of the cylindrical portion in the processing holes at both ends, and directly from both ends of the grooved plate 24 bridged on the top surface of the collar 23. It is fixed on the feed base 12 with bolts 25. Accordingly, the grip base 21 is constantly pressed on the feed base 12 by the spring 22. When starting to pass the material, the grip table 21 may be raised. For this purpose, by rotating the lever 26, the protrusion of the boss of the lever 26 is separated from the groove of the grooved plate 24 and pulled up by a bolt 27 screwed in the center portion of the grip base 21 to create a gap with the feed base 12. be able to. The pressable spring 22 is provided in contact with the upper surface of the grip base 21 and the lower surface of the collar of the flanged collar 23.
[0025]
The grip plate 28 is driven by two bolts fixed to the grip plate so that the grip plate 28 can be reliably gripped by pressing the strip from the lower surface of the grip base 21 with the upper and lower planes in the plate thickness direction. This is performed by rollers 33A and 33B provided on one lever body 32 so that the slide shafts 29A and 29B with a pair of rods act simultaneously. The flanged slide shafts 29A and 29B are supported on the feed base 12 by bearings 31A and 31B, and the flanges of the flanged slide shafts 29A and 29B are always brought into contact with the rollers 33A and 33B supported by the swinging lever body 32. Springs 102A and 102B are fitted to each of the shafts so as to press downward.
[0026]
The cam follower 34 provided on the lever body 32 whose one end is supported by the swinging body is in contact with the upper surface of the second cam 43 that is mounted on and driven by the second shaft 20 that is supported by the outer diameter of the first shaft 15. , 33B are driven upward, and the grip plate 28 is moved upward so as to contact the lower surface of the grip base 21, so that the band material can be clamped. A pressing pin 40 to which a pressing force is applied by a spring is in contact with the tip of the lever body 32 in order to ensure contact between the cam follower 34 and the second cam 43. The second shaft 20 is conducted at a reduced speed from the first shaft 15 through the intermediate shaft 19.
The second shaft 20 is supported on a gear box 36 by a bearing 39, and an outer diameter is supported on a rocking body 52 by a bearing 38 and a rocking body capable of rocking by a predetermined angle. The outer diameter of the first shaft 15 is supported by a bearing 37 having a sleeve inner diameter of the second shaft 20.
[0027]
Next, the configuration of the clamp member will be described. The clamp member that grips the strip with the clamp base and the clamp plate when the feed base is retracted and when drilling is performed with this machine is referred to as second gripping means.
[0028]
  2 and 3The clamp base 45 of the clamp member is fixed to the rocking body. A clamp plate 46 that presses and clamps the supply band material from below to the lower surface of the clamp table 45 is guided by a slide bearing 47 fixed to the rocking body, and is pressed against the clamp table 45 by a pressing pin 49 biased by a spring. .
  The clamp plate 46 is moved up and down with a cam follower 48 provided at the lower end of the clamp plate contacting the cam surface of the third cam 44 attached to the second shaft 20. The third cam 44 is integrally fixed to the end flange surface of the second shaft 20 so that the contact surface of the second cam 43 and the cam follower is provided on the side surface.
[0029]
Next, the configuration of the swing drive member and the conduction mechanism between the first, second, and third axes will be described.
[0030]
2 and 4, the gear box 36 is provided with a swinging body which is supported by a sleeve 51 supported by an upwardly projecting support 51 and is integrally formed with the sleeve 52 so as to swing freely within a predetermined range. It has been.
The rotation from the pulley 64 at the input end of the first shaft 15 whose shaft end is supported by the gear box 36 is transmitted to the second shaft 20 and the sleeve (third shaft) 52 provided in the gear box.
[0031]
  Figure5In the case of three-hole drilling from the first shaft 15 rotating to the second shaft 20 by the gear trains 54, 55, 56, 57, the speed is reduced and transmitted from the second shaft 20 to the gear box 36. Transmission to the fixed fourth camshaft 53 is performed by constant speed gears 57 and 58. The rocking body and the sleeve 52 are swung by bringing the cam follower 60 attached to the lever 59 fixed to the end of the sleeve into contact with the cam surface of the fourth cam 61 fixed concentrically with the gear 58. The fourth cam 61 is rotated once for one rotation. In the three-row drilling, the fourth cam 61 is divided into three at 120 °, and the lift amount has three kinds of heights. This is because the rocking body is equally distributed from the center to the left and right.
[0032]
  Figure6When the fourth cam 61 rotates, the oscillating body on which the inertial force acts and the pressing pins 62 and 63 biased by springs so that the oscillating motion of the sleeve 52 can follow the cam surface are applied to the lever 59 from two different directions. The pressing cam follower 60 and the fourth cam 61 are securely in contact with each other.
[0033]
Next, the operation of the gripper feed type swing feeding device of the present invention will be described.
[0034]
  Figure 7 shows the press ram motion,Material feed5 is a chart showing drive timings of the first cam, the second cam of the grip, the third cam of the clamp, the fourth cam for swinging the swinging body, and the like. Step NO is entered in the bottom row of FIG.
[0035]
In step S1, the press ram starts to descend from the top dead center, and the clamp portion is in an open state. The material is gripped by the grip portion, and the feed base 12 continues to advance. In parallel with this operation, the swinging fourth cam swings the swinging body to the left while continuing to rotate.
[0036]
In step S2, the press ram reaches the middle up to the bottom dead center and causes the clamp to grip the material before the grip releases the material. The rocking body finishes moving to the rocking center line of the rocking body after the left rocking is finished.
[0037]
In step S3, the strip is clamped and the press ram reaches bottom dead center and drills in the center of the supply strip. This is indicated by the hatched holes in FIG.
During this time, the feed base moves backward toward the supply side with the grip open.
[0038]
In step S4, the feed base completes the return to the starting point of the supply of the strip material, and the gripping portion is the strip material before the swinging fourth cam is held in the same rotational position as in step S3 and the clamp portion is opened. Begin to grip. The press ram is in the middle of climbing to top dead center.
[0039]
In step S5, the press ram starts to descend from the top dead center. The opening of the clamp part, gripping of the grip part, and advance of the feed base are the same as in step S1. However, the swinging fourth cam rotates to start swinging the swinging body to the left. This is for processing the right end hole of the supply strip.
[0040]
Step S6 differs from step S2 only in that the swinging fourth cam reaches and is held at the lowest lift position.
[0041]
  In step S7Material feed 1Only the cam is driven and the rocking bodyIsWith the left swing end reachedRetainedThe press ram is activated to machine the hole on the right side of the supply strip. In FIG. 7 (c), hatched circles are shown.
[0042]
Next, when a hole is machined in the left end of the strip as shown by the hatched circle in FIG. 7D, it is not necessary to supply the strip, and only the swing of the strip is sufficient. Therefore, the feed base 12 repeats advancing and retreating with the grip portion opened, but the material is not fed out because the material is gripped by the clamp portion. It is only necessary to swing the housing from the left end to the right end of the swing limit. This is shown in steps S8 to S12.
Therefore, while the left and right holes are being machined, the grip portion is always open and the clamp portion is always holding the belt material.
[0043]
[Example 2]
The second embodiment is also a belt feed device for multi-row drilling, but the configuration of the member that drives the rocking body is basically the same as that of the first embodiment, and a description thereof will be omitted.
[0044]
In the first embodiment, the band material is pressed and gripped from below by the grip plate 28 and the clamp plate 46, whereas in the second embodiment, the material is pressed and gripped from above by the grip plate 73 and the clamp plate 73 ′. Is different.
Here, the supply band member in the second embodiment will be described with reference to the drawings with respect to the grip member, the clamp member, the feed base drive member, and the grip portion drive member.
[0045]
FIG. 8 is a side view of the first and second gripping members that press the band material from above with the grip plate 73 and the clamp plate 73 ′.
FIG. 9 is a top view showing the relation between the operation cam lever of the grip plate and clamp plate of FIG. FIG. 10 is a cross-sectional view taken along the line DD of FIG.
In FIG. 8, material is supplied from the left side and moves to the right. In FIG. 10, the strip 1 is gripped between the grip plate 71 and the grip plate 73 urged in the gripping direction by the spring 72 at all times.
[0046]
The relationship between the first gripping means will be described with reference to FIGS. The grip plate 73 is screwed to the upper end surfaces of a pair of shafts 75A and 75B supported by a bearing 74 perpendicular to a plane including the axis of the support shafts 13A and 13B of the feed base 12. A bar 77 that contacts the cam follower 87 is bridged and screwed to the lower end surfaces of the shafts 75A and 75B. The cam floor 87 is pivotally supported at the tip of a lever 86A supported on the shaft 85. A spring 72 that presses the upper surface of the grip plate 73 downward is passed through a bolt 78 screwed at the center of the upper surface of the grip plate 73, and the lower end surface of the spring 72 abuts on the upper surface of the grip plate 73, The end surface is in contact with a plate 80 bridged between two bolts 79 that are vertically installed on the upper end surface of the feed base 12. And it is adjusted by moving the plate 80 up and down with a nut 81 so that a predetermined grip pressure is generated.
The grip plate 73 is lifted by lifting the grip portion 78a at the upper end of the bolt 78, and the grip plate 71 is opened to facilitate the first material passage.
[0047]
Since the configuration of the clamp member of the band member of the second gripping means is the same as that of the grip portion of the first gripping member, the reference numeral is given and the description is omitted. The grip plate 73 serves as a clamp plate 73 ′. Further, the grip table 71 becomes a clamp table 71 '.
[0048]
Next, driving members for the grip part and the clamp part will be described with reference to FIGS.
The movement of the cam follower 84 that contacts the second cam 83 of the disc attached to the drive shaft 82 is integrated with the upper and lower levers 92A supported by the shaft 85 with the cam floor 84 pivotally supported at the tip. The cam follower 93 pivotally supported by the horizontal lever 92B is converted into vertical movements of the shafts 75A 'and 75B' via the bar 77 'and transmitted.
The cam floor 84 pivotally supported by the upper and lower levers 92A is pressed against the second cam 83 by a pressing element 106 in which a roller 105 pivotally supported by a lever 92C integrated with the upper and lower levers 92A is biased in a protruding direction by a spring 69. Has been. The shaft 85 is supported by a support 101 provided on the oscillator 11.
[0049]
The grip portion is driven by being screwed onto the upper surface of the second cam 83 so that the third cam 90 rotates integrally. The third cam has a cam surface formed on the outer periphery of the upper surface. A cam follower 91 pivotally supported by a lever 86B integral with a lever 86A supported by the shaft 85 biases a roller 104 pivotally supported by a lever 86C integral with the lever 86B by a spring 70, and a third cam by a presser 107. 90. The lift amount of the cam 90 is converted into the vertical movement of the cam follower 87 via the levers 86B and 86A supported on the shaft 85 and transmitted to the bar 77 connected to the shafts 75A and 75B.
[0050]
Next, the structure of the feed base driving mechanism for feeding the strip material in a fixed amount will be described.
[0051]
Rotation is transmitted from a gear 94 attached to the drive shaft 82 to a gear 96 keyed to the shaft 95. In the second embodiment, the number of rows of multi-row holes to be processed is different from that in the first embodiment, and the speed ratio of the conduction mechanism between the feed base 12 and the material gripping means driving unit is different. Here, only the positioning of the feed base 12 in the second embodiment will be described.
[0052]
A first cam 97 for advancing and retracting the feed base 12 is fitted to the upper shaft end of the shaft 95 using a taper ring 98 for convenience of replacement and adjustment. The first cam 97 has two cam surfaces 97a and 97b, and a cam follower 99 attached to a fixed position of the feed base 12 and a cam follower attached to the feed base 12 so that the position can be adjusted according to the lift amount of the first cam 97. It is arranged so as to be sandwiched by 100.
[0053]
The operation of the material holding unit, the gripping unit driving unit, and the feed base driving mechanism according to the second embodiment will be described.
[0054]
8 and 10, the material 1 passes the grip plate 73 between the grip plate 73 and the grip base 71 by releasing the pressing force manually or by raising the cam follower 87.
FIG. 10 shows a material traveling direction view of the first gripping portion.
[0055]
When the levers 86B and 86A are rotated counterclockwise by the rotation of the cam 90 and the push-up force of the bar 77 is removed, the belt material is securely gripped between the grip plate 73 biased by the spring 72 and the grip base 71. (Clamped). The levers 92A and 92B are rotated counterclockwise by a slight rotation of the cam 83, and the bar 77 'is pushed up, and the clamp plate 73' is released from the grip of the opening band against the force of the spring 72 '( Unclamped).
[0056]
As described above, the first gripping member of the feed base 12 and the second gripping member of the oscillating body 11 have the same configuration and the same gripping action. The timing at which the gripping action functions is the same as in the first embodiment, and only one of them performs the gripping action. However, before the grip part of the first gripping member releases the gripping, the clamp member of the second gripping member is clamped and the material The drive timing is set so that no movement occurs.
In Example 2, since the material is pressed from above and gripped or clamped, it is not necessary to lift the material when the width or thickness of the material increases and its own weight is large, and the load of the spring is not affected by the weight of the strip. There is an effect that can be pressed at a constant.
[0057]
Example 3
Next, description will be made based on FIG. 11 which is a front view showing a part of the third embodiment in section, FIG. 12 which is a plan view of FIG. 11, and FIG. 13 which is a sectional view taken along line EE of FIG.
The same members as those in the second embodiment are denoted by the same reference numerals and the description thereof is omitted.
[0058]
A swing shaft 111 is rotatably supported by a bearing in a vertical direction on a frame 110 of the swing device. The base 112 of the rocking body 11 made of a frame is horizontally attached to the flange 111a at the upper end of the shaft. A ball screw 113 is rotatably supported by a bearing on the side wall of the frame in parallel with the two horizontal support shafts 13A and 13B. The ball screw 113 is attached to the side wall via a joint 114 and connected to the output shaft of a servo motor 117 with an encoder 116. And the ball nut attached to the feed stand 12 which has a 1st holding member and is guided so that movement is possible with the support shafts 13A and 13B is screwed together with the ball screw 113. Therefore, when the servo motor 117 rotates forward and backward, the ball screw 113 is rotated forward and backward, and the feed base 12 and the first gripping member having the grip base 71 and the grip plate 73 are moved forward and backward.
[0059]
On the side wall of the oscillating body 11, a clamp base 71 ′ and a bracket 89 having an upper surface similar to the grip base 71 and having a belt material transfer surface are attached. The bracket 89 supports a second gripping member similar to the configuration of the first gripping member together with the clamp base 71 ′.
Further, two stands 118 are established at the center between the first gripping member and the second gripping member on the base 112 with the belt material transfer line interposed therebetween, and the support shaft 119 is fixed horizontally between the two stands 118.
[0060]
An L-shaped lever 122 having a roller 121 whose upper and lower arms protrude downward from the window of the base 112 and whose horizontal arm is pivotally supported at the tip is pivotally supported on the support shaft 119. The roller 121 is brought into contact with the lower surface of the bar 77 of the first holding member. Since the roller 77 has a wide width in the feed direction, the roller 121 is maintained in the contact state even when the feed base 12 moves forward and backward. An L-shaped lever 123 of the same shape is pivotally supported on the support shaft 119 in the opposite direction, and the upper and lower arms protrude downward from the window of the base 112, and the roller 124 pivotally supported at the tip of the horizontal arm is a second one. It is brought into contact with the bar 77 'of the gripping member. The roller 121 and the bar 77 are pressed against each other by a spring 72. The roller 124 and the bar 77 'are also pressed against each other by a spring 72'.
[0061]
The upper and lower arm ends of the L-shaped lever 122 are connected to the output shaft of the air actuator 126 attached to the base 112 by a joint 128. The upper and lower arm ends of the L-shaped lever 123 are connected to the output shaft of an air actuator 127 attached to the base 112 by a joint 129. It is also possible to replace the air actuator with an electromagnet.
[0062]
Further, an unillustrated bracket that protrudes from the oscillator 11 is provided with an encoder 132 that measures the amount of belt material transported each time and outputs it to the control device. Further, a receiving base 133 is provided on the upper surface of the side wall of the oscillating body 11 to receive and guide the band material at a position in front of the first gripping member.
[0063]
The first holding member, the second holding member, the air actuators 126 and 127 of these driving devices, the ball screw 113 of the driving means of the feed base 12, the base 112 supporting the servo motor 117, etc. The lower end is connected to the output shaft of the speed reducer 131 of the servo motor 136 and the joint 137 provided on the frame body 110 with the output shaft in the vertical direction. Therefore, when the servo motor 136 rotates forward and backward, the swing shaft 111 whose center of rotation is located in the center of the width of the strip is swung, and the strip is swung left and right around the center of rotation as the center of rotation. You can change the line.
[0064]
FIG. 14 of the control block diagram of the third embodiment will be described.
[0065]
141 is a program input unit for inputting data such as a single feed amount of the strip, a swing amount (swing angle) of the strip, and an electromagnetic switching valve operation timing; 142 is a program storage unit for storing the input program; 143 is a program reading unit that reads out a necessary program from the program storage unit 142 according to the timing generated by the timing generation unit 140 in accordance with the operation of a press machine (not shown), and 144 is a command reading unit that issues a command based on the data. Compare the values of 134 and 132 to confirm whether a predetermined amount has been sent, and stop the function when the predetermined amount has been sent. If the comparison with the encoder 132 does not match, the belt material slips and the feed is judged to be out of order and the operation of the machine is stopped.
[0066]
Reference numeral 145 denotes a function generating unit that generates a function for sending one pitch of the strip, 146 denotes a drive unit that drives the servo motor 117 according to the generated function, and 147 is used to shift the processing line at the multi-stage drilling position of the strip. A function generating unit that generates a function for swinging a predetermined swing amount, 148 is a driving unit that drives the servo motor 136 by this function, and 149 is turned ON / OFF in response to a command from the servo motor 117, and the first gripping member The electromagnetic switching valve 150 for sending the pressure air from the pressure source to the air actuator 126 of the second actuator 150 is operated ON / OFF in synchronization with the operation of the air actuator 126 by the air actuator 127 of the second gripping member. It is an electromagnetic switching valve that sends pressurized air.
[0067]
The operation of the third embodiment configured as described above will be described with reference to the flowchart of FIG.
It is assumed that the width of the strip to be used and the hole diameter to be drilled are determined, and for example, three rows as shown in FIG. 7 are efficiently processed at a position where the center second row is shifted by a half pitch. The first gripping means is in an unclamped state (open state), and the second gripping means is in a clamped state (closed state).
[0068]
3 rows of the same feed amount (pitch), 2nd row of half pitch delayed start point, the distance from the center of the rocking shaft 111 to the drilling position by the press and the distance between the hole rows, Data such as the shake direction is input to the program input unit 141 with a tape or a numeric keypad (MDI). This input data is stored in the program storage unit 142.
The operation of the press machine is started, and the program reading unit 143 reads out necessary information from the program storage unit 142 at the timing of the timing generation unit 140 related to the press machine in step S21.
[0069]
Since the first start position is located in the second row in step S22, it is determined whether or not there is no rocking for machining into the second row of the central line of the strip, or there is rocking for machining into the first row or the third row. judge. If NO, the electromagnetic switching valve 149 is closed in step S23, the supply of pressurized air to the air actuator 126 is stopped, and the air in the air actuator is discharged. As a result, the force that pushes up the bar 77 by the L-shaped lever 122 is removed, and the grip plate 73 grips and clamps the band material with the grip base 71 by the force of the spring 72.
[0070]
In step S24, the electromagnetic switching valve 150 is simultaneously or slightly delayed, that is, the first gripping means is actuated after gripping to supply the pressure air to the air actuator 127. Steps S23 and S24 may be operated simultaneously. As a result, the L-shaped lever 123 is rotated counterclockwise in FIG. 11, and the clamp plate 73 ′ is pushed up against the force of the spring 72 ′, and the band material is unclamped. By slightly operating the electromagnetic switching valve 150, the band material is always kept in a clamped state and the pitch is not shifted.
[0071]
In step S25, based on a command from the program reading unit 143, the drive unit 146 is operated by the function generated by the function generating unit 145, and the servo motor 117 is rotated. In step S26, it is determined whether or not the servo motor 117 has been rotated for transferring one pitch of the band material by comparing the command value with the output of the encoder 116. If NO, repeat this determination. If YES, the servo motor 117 is stopped in step S27.
[0072]
In step S28, the comparison unit 144 determines whether or not the belt 132 is surely fed without slippage based on the output of the encoder 132. If NO, the operation of the press machine and this device is stopped and an alarm is issued as insufficient feeding due to slipping. . If YES, the electromagnetic switching valve 150 is closed in step S29, and the pressure air to the air actuator 127 is shut off and discharged. As a result, the clamp plate 73 'clamps the band material with the clamp base 71' by the force of the spring 72 '. Holes are punched with a press machine in the band material sent by 1 pitch.
[0073]
During this time, the electromagnetic switching valve 149 is opened in step S30 to supply pressurized air to the air actuator 126 and the air in the air actuator is discharged, and the L-shaped lever 122 is rotated clockwise to move the grip plate 73 to the spring 72. Release the push-up grip against the force, and unclamp the strip. Steps S29 and S30 may be operated simultaneously. In step S31, the servo motor 117 is reversely rotated to retract only the opened first gripping means and feed base 12. In step S32, the comparison unit 144 determines based on the output of the encoder 116 whether the movable table 12 and the first gripping means of one pitch have moved backward. If NO, the judgment is repeated until they match. If YES, the operation of the servo motor 117 is stopped in step S33. One pitch feed ends.
[0074]
If YES in step S22, it is determined whether the rocking direction is positive (rightward in FIG. 7) in step S34. If YES, the servo motor 136 is rotated forward in step S35. In step S36, the comparison unit 144 determines whether the band has rotated a predetermined angle based on the output of the encoder 134. If NO, the determination is repeated until they match. If YES, the servo motor 136 is stopped in step S37 and the process proceeds to step S23. If NO in step S34, the servo motor 136 is reversely rotated in step S38 so that the band is swung in the opposite left direction. Then, the process proceeds to step S36.
In this way, the feeding of one pitch of the strip is completed.
[0075]
In the embodiment of the present operation, the operations of the servo motor 117 and the servo motor 136 are described in series. However, it is of course free to proceed at the same time and proceed in parallel, and this reduces the idle work time.
[0076]
【The invention's effect】
According to the first aspect of the present invention, since the processing material is sandwiched between the grip members and moved by a certain amount, the material can be fed constantly and stably. That is, by using the gripper feed method to reliably feed the material without using a roller, it is possible to feed with high material feed accuracy.
[0077]
Since the swing feed device is configured to enable grip feed instead of the conventional roller feed, the feed amount can be adjusted only by changing the constant width cam to be used. Alternatively, depending on the configuration, only the positioning for stopping the grip is performed, and it is easy to adjust the delicate feed amount, and the adjustment work can be easily performed even by a skilled worker, which is efficient.
Since the material feed amount is always constant, the width of the material can be made as narrow as possible, and the material yield is improved. For this reason, it is possible to perform more stable oscillating feed as compared with the conventional roller feed, and the material yield is further improved.
[0078]
A cam and a pair of cam followers are provided for the feed amount on the axis of the material supply direction, and the start and end of the feed base are positioned in contact with the cam follower, so even if a high-speed feed base is driven by a cam at high speed Accurate positioning is possible, and in combination with the fact that the material is securely held on a flat surface, accurate quantitative feeding is possible. Further, the feed amount can be easily changed by replacing the first cam constituted by two parts in order to facilitate installation from the outside.
[0079]
Further, the first shaft for driving the first cam of the feed base, the second shaft for driving the second cam of the grip portion and the third cam of the clamp portion, and the fourth cam from the first shaft to turn the third shaft. Since the transmission mechanism that swings by applying displacement to the lever integrated with the moving body is simply constructed and connected, reliable gripping of materials, accurate material feeding, followability and high positioning accuracy, etc. In addition, it is possible to maintain the timing accuracy between elements for a long period of time.
[0080]
  Claim2According to the invention, the power from the drive source is transmitted using a universal joint or the like by matching the center of the swinging portion that swings the material with the center of the driving force transmission of the feeding portion that feeds the material and transmitting the driving force. Does not need to be transmitted from the outside to the feed section. Therefore, there is no risk of looseness due to the use of a universal joint or the like, and a device with good positioning accuracy can be obtained.
[0081]
  Claim3According to this invention, when operated by a cam, the feed amount and the swing amount are determined, and the change cannot be easily dealt with because it is necessary to replace the cam or change the lever ratio. By changing the program of the control unit that collectively controls the driving means, it is possible to easily cope with changes in the rocking angle of the strip, the material feed amount, and the like.
[0082]
  AlsoSince an NC control servo motor is used as the drive source for oscillation, changing the input data in the program input section makes it very easy to handle a wide range of band widths for machining rows, machining pitch changes for machining positions, etc. be able to.
[Brief description of the drawings]
1A and 1B are views of a first embodiment of the present invention, in which FIG. 1A is a top view of a gripper feed type swing feeding device according to the present invention, and FIG. 1B is a top view of FIG. It is a figure which shows the state rock | fluctuated centering on an axis | shaft.
FIG. 2 is a diagram of the first embodiment of the present invention, and includes first, second, and third shafts for driving and a swing driving member in the AA sectional view of FIG. 1;
FIG. 3 is a diagram of the first embodiment of the present invention, and includes drive members for a grip part and a clamp part in the BB cross-sectional view of FIG. 1;
FIG. 4 is a diagram of the first embodiment of the present invention, and is an axial development view of the transmission mechanism between the first, second, and third shafts provided in the gear box of the present invention.
FIG. 5 is a diagram of the first embodiment of the present invention, and is a gear train that drives a fourth cam that swings the feed base of the present invention.
6 is a diagram of the first embodiment of the present invention, and is a cross-sectional view taken along the line CC of FIG. 2, and shows a pressing pin that applies a pressing force from two directions to a lever that swings integrally with the swinging body. Indicates placement.
FIG. 7 is a diagram of Embodiment 1 of the present invention, and FIG. 7 (a) is an operation timing chart of the gripper feed type swing feeding device of the present invention. (B) to (e) are diagrams showing the material swing position at each timing in press processing. (B) is an example of processing of three rows of holes, and when processing the center hole after processing the left hole (the black circles are already shown). (Processing hole and hatched circle indicate the hole to be processed) It indicates that the central hole is processed after the material feed and swinging to the left and returning to the center. (C) feeds material and swings leftward in order to machine three rows of inner right holes. (D) shows a case where the left side of the three rows is processed, and the hole at the left end of the right end may be the same feed, so there is no feed and only the swing to the right end is required. (E) repeats the same operation after returning to (b).
FIG. 8 is a diagram of a second embodiment of the present invention, and is a side view of a material feeding portion and a gripping portion driving member for pressing and gripping the supply material on the grip base and the clamp base of the present invention from above with the grip plate and the clamp plate. It is.
9 is a top view showing the relationship between the grip plate, the operation cam of the clamp plate, and the lever of FIG. 8. FIG.
FIG. 10 is a DD view of FIG.
FIG. 11 is a front view, partly in section, of Example 3 of the present invention.
FIG. 12 is a plan view of Embodiment 3 of the present invention.
FIG. 13 is a cross-sectional view taken along line EE in FIG. 11 of Embodiment 3 of the present invention.
FIG. 14 is a control block diagram according to the third embodiment of the present invention.
FIG. 15 is a diagram showing an operation flow of the third embodiment of the present invention.
FIG. 16 is a roller feed type feeding device with a rocking device according to the prior art.
[Explanation of symbols]
1 Band material
2 Band material guide
3 lid
11 Oscillator
12 Feeding base
13A, 13B Support shaft
14A, 14B, 47 Slide bearing
15 1st axis
16,97 1st cam
17A, 17B 34, 48, 60, 76, 84, 87, 91, 93, 99 Cam follower
18A, 18B Spring
19 Intermediate shaft
20 Second axis
21,71 Grip stand
22, 72, 102A, 102B Spring
23 Carp with collar
24 grooved plate
25, 27, 78, 79 bolts
26, 59, 86A, 86B, 92A, 92B, 92C Lever
28, 73 Grip plate
29A, 29B Slide shaft with flange
33A, 33B Roller
31A, 31B, 37, 38, 39, 74 Bearing
32 Lever body
36 Gearbox
40, 62, 63 Pressing pin
43,83 2nd cam
44 3rd cam
45,71 'Clamp stand
46,73 'clamp plate
51 Support
52 Sleeve (3rd axis)
53 4th camshaft
54, 55, 56, 57, 58, 94, 96 gears
61 4th cam
64 pulley
75A, 75B, 85, 95 axes
80 boards
81 nuts
82 Drive shaft (first axis)
90 3rd cam
98 Taper ring
101 Support
111 Oscillating shaft
113 Ball screw
117,136 Servo motor
126,127 Air actuator
116, 132, 134 Encoder
122,123 L-shaped lever

Claims (3)

In a material feeding apparatus that supplies a strip for processing into a press machine, a grip member that grips the strip on a plane in a plate thickness direction formed by a grip base and a grip plate facing the grip base, and gripped by the grip member A feed base for supplying a fixed amount of strip material to a processing site; a feed base drive member provided on a first shaft for positioning a guide by positioning a movement amount of the feed base with a pair of cam followers; and the grip member While not holding the strip, the clamp member that grips the strip on the plane in the plate thickness direction formed by the clamp base and the clamp plate facing the clamp base, and the operations of the grip member and the clamp member are reversed. The material gripper drive member having the second shaft attached with the second cam and the third cam having the cam surfaces as described above, the feed base, the feed base drive member, the clamp member, and the material gripper drive A rocking body that supports the material and forms a third shaft, and a third cam that rotates synchronously with the second shaft and rocks a lever that is integral with the third shaft. The first gripping means grips the strip material only when the strip material is supplied to the swing drive member that swings the shaft, and the first shaft, the second shaft, and the third shaft. While the moving body swings, the feed base feeds the material, and after the feeding is completed, the second gripping means clamps the band material to retract the feed base and clamps the band material. It is equipped with a transmission mechanism that synchronizes operation by swinging the moving body so that the strip can be positioned at a predetermined position, and performing multi-line punching of the strip by performing constant-length feed of material feed and swing positioning A gripper feed type rocking feed device. The gripper feed type rocking feeding device according to claim 1, wherein the material feeding device is configured by aligning the axis of the first shaft, the second shaft, and the third shaft . In a material feeding apparatus for supplying a strip for processing into a press machine, a first gripping means for gripping the strip in a plane in a plate thickness direction at the time of material feeding, and a strip feed direction by supporting the first gripping means A material feed base that is movably supported, a first driving means that is an air actuator that opens and closes a grip portion of the first gripping means, and a servo motor that drives a ball screw that moves the material feed base forward and backward. A third driving means; a second gripping means for gripping the strip in a plane in the plate thickness direction when the feed base is retracted; a second driving means being an air actuator for opening and closing a clamp portion of the second gripping means; A base provided so as to be swingable around a vertical axis passing through the width center of the strip material, supporting the material feed base, the first drive means, the second drive means, and the third drive means; Rocking the base The first driving means, the fourth driving means, and the first and second gripping means are opened and closed when one of them is closed and the other is opened, and the first and second gripping means are opened at the same time or after the closing. A control unit that controls the driving means and the second driving means and controls the third driving means and the fourth driving means after the first driving means and the second driving means are operated is provided. A gripper feed type swing feeding device characterized by the above .

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