JPS5935839A - Material feeding device for press - Google Patents

Abstract

PURPOSE:To adjust the feed quantity of a material to be worked without replacing a cam, by making a rock supporting point of a rocking arm of each work device variable by operating each adjusting screw, and changing a reciprocating stroke of a base member and a jaw holder. CONSTITUTION:A stroke running along the second moving path of a jaw holder 48 against a base member 44 can be adjusted to a desired value by changing a height position of a fork member 124' by operating an adjusting screw 138' of the second operating device 90 in the same way as an adjusting screw 138 in the first operating device 88, and an initial set position of the jaw holder 48 can be adjusted along the second moving path by adjusting length dimensions of a link member 96'. Accordingly, rock supporting points of rocking arms 124, 124' can be made variable without replacing cams 94, 94' of the first and the second operating devices 88, 90.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a material supply device for supplying a strip-shaped workpiece to a press.

A typical example of a conventional device of this type is a roller feeder that includes a pair of material feeding rollers.

However, with this roller feeder, it is not possible to eliminate slippage between the pair of feed rollers and the workpiece that is sent to the press through the rollers, and for this reason, the roller feeder cannot feed materials with high precision. Not suitable.

In order to achieve highly accurate material feeding, a gripper feeder with a movable grip for gripping the workpiece is preferred. The movable grip has a pair of jaws, one jaw being actuated toward the other jaw in cooperation with the other jaw to clamp a workpiece therebetween, and both jaws clamping a workpiece therebetween. In this state, the entire movable grip is moved in the direction of conveyance of the workpiece. Therefore, according to the gripper feeder, there is no slippage between the workpiece and the jaws that grip it, and the material can be fed with high precision.

However, in the conventional gripper feeder, the entire reciprocating motion of the movable grip along the conveying direction is generally provided by a hydraulic cylinder device, and therefore, by adjusting the stroke of the hydraulic cylinder device, Although the amount of material fed can be easily adjusted, it is not suitable for high-speed operation, and for this reason, it has been difficult to feed material at high speed with conventional gripper feeders.

In particular, when attempting to feed the workpiece in a staggered manner, so-called zigzag, the movable grip is moved reciprocatingly along a path of motion toward the press, and at the same time is moved along a path of movement perpendicular to the path of the reciprocating motion. It becomes necessary to make a reciprocating movement along the line. For this reason, it is necessary to synchronize the operation of each hydraulic cylinder device that provides reciprocating motion to the movable grip along each movement path, so it is not possible to speed up material feeding with the conventional gripper feeder. Ta.

In order to achieve high-speed operation of the gripper feeder, it is conceivable to use a cam drive device including a cam mechanism in place of the conventional hydraulic cylinder device that provides reciprocating motion to the movable grip. According to this cam drive device, even in the staggered feeding described above, the cam mechanism can reliably synchronize the movements along the motion paths perpendicular to each other, and the material can be fed at high speed with high precision. However, if the movement of the cam mechanism is simply transmitted to the movable grip via the swing arm, the feed amount of the material cannot be adjusted.
In order to change the feed rate of this material, it is necessary to replace the cam itself of the cam mechanism.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a material feeding device for a press sump, which can adjust the amount of material fed by frequently replacing parts, and can feed material with high precision and at high speed.

The present invention basically provides that an actuating device for reciprocating a movable grip is arranged angularly with respect to a link member extending from the movable grip along a path of movement of the movable grip and is pivotally connected at one end to the link member. a swinging arm;
a fork member having a rotation shaft positioned in a frame so as to be adjustable in the longitudinal direction of the swinging arm in order to provide a movable fulcrum for the swinging arm, and into which the swinging arm is slidably received in the longitudinal direction; means for regulating the movement of the swing arm in the longitudinal direction; a connecting member reversely connected to the other end of the swing arm by a pivot; and a means for controlling the swing arm to the movable fulcrum via the connecting portion a cam mechanism for swinging around the fork member, the swing fulcrum is variable by adjusting the position of the fork member, and the movable arm is connected to the one end of the swing arm via the link member. A feature is that the overall stroke of the grip can be adjusted.

Further, the present invention provides first and second movable grips for actuating a movable grip reciprocally along a path of movement toward the press and a path of movement perpendicular to the path of movement, respectively. The present invention is characterized in that each of the actuating devices uses the actuating device that makes the swinging fulcrum variable, thereby making it possible to accurately and adjust the staggered feeding of the workpiece at high speed.

The features of the invention will become clearer from the following description of the illustrated embodiment.

In FIG.
The material supply device, indicated schematically at 0 and 9, although not shown, is installed in close proximity to the press to supply a strip of workpiece material to the press.

The feeding device 10 includes a frame 12, a movable grip 14 for holding the workpiece, and a fixed grip 1.
6, and both grips 14 and 16 are supported by the frame 12.

The fixed grip 16 includes an upper jaw 18 and a lower jaw 20, as shown in FIG. The upper jaw 18 is supported by the frame 12 via a conventionally well-known elastic support device, although not shown. The lower jaw 20 is supported by a jaw holder 22 fixed to the frame 12 so as to be slidable toward the upper jaw 18, and receives a spring force toward the upper jaw 18 from a spring 24. Upper jaw 18
A cam mechanism 26 for actuating the jaw is located at the bottom of the jaw.
A connection 28 to is provided.

The cam mechanism 26 includes a generally circular plate cam 32 fixed to a lateral drive shaft 30 (see FIG. 1) extending in the lateral direction of the frame 12, and a cam follower 34 that engages with the circumferential surface of the cam. Be prepared. The cam follower 34 is rotatably supported by the lower end of a generally rectangular frame member 36, whose upper portion is pivotally connected to the lower portion of the connecting portion 28 via a shaft 38. The frame member 36 has a sliding member 4 slidably engaged with opposing inner surfaces thereof and fitted onto the shaft 30.
0 guides the vertical movement.

The cam 32 vertically moves a frame member 36 supporting the cam follower through a cam follower 34 engaged therewith, and the movement of the frame member 36 causes the lower jaw 20 to move upwardly.
is moved up and down.

The fixed grip 16 thus clamps the workpiece between the jaws 18, 20 in position while the movable grip 14 unclamps the workpiece, as is well known in the art. It is operated as expected.

As shown in FIGS. 1 and 3, the movable grip 14 includes a pace member 44 that extends perpendicularly to the drive shaft 30 and is slidable on a pair of slide shafts 42 supported by the frame 12. , a jaw holder 48 that extends perpendicularly to the extending direction of the slide shaft 42 and is slidable on a pair of slide shafts 46 supported by the base member 44. The slide shaft 42 defines a first path of movement of the base part @ 44 towards the press 9, and the slide shaft 46 defines a second path of movement of the jaw holder 48 at right angles to the first path of movement. .

Jaw holder 48 supports an upper jaw 50 and a lower jaw 52, as clearly shown in FIG. The upper jaw 50 is attached to the jaw holder 4 via a conventionally well-known elastic support device (not shown).
It is elastically supported by 8. The lower jaw 52 includes a pair of guide portions 56 that are slidably received in a pair of guide holes 54 provided vertically through the jaw holder 48, thereby directing the lower jaw 52 towards the upper jaw 50 and It is extendable and slidable in a direction away from the jaw.

A slit 58 extending in the axial direction of the guide portion 56 is provided in the center portion of each guide member 56, and a spring seat member 60 that is loosely fitted into the slit across the slit is supported by the jaw holder 48. There is. A coil spring 62 is incorporated in association with the spring seat member 60 to apply a downward spring force to the lower jaw 52. At the lower end of each guide part 56, there is a
A partially exposed roller 64 is pivotally mounted.

An elevating member 66 is disposed below the base member 44 to define the raceway surface of the roller 64 and to push up the lower jaw 52 toward the upper jaw 50 via the roller. The roller 64 moves the lifting member 6 along with the movement of the jaw holder 48 relative to the base member 44.
Roll on 6. The elevating member 66 slidably receives a shaft member 68 extending downward from the base member 44 .

Therefore, the elevating member 66 can move integrally with the base member 44 along the slide shaft 42, and can also move up and down with respect to the base member 44.

Rollers 68 are rotatably supported at both ends of the elevating member 66. Each roller 68 rolls on a flat surface 72 formed on each of the vibrating shirts 70 extending parallel to the slide shaft 42 in the longitudinal direction of the shirts 70 as the base member 44 moves. Both vibrating shafts 70 swing in opposite directions to each other around the longitudinal center axis of each shaft 70 in order to impart vertical movement to the elevating member 66 via the rollers 68.

The device for imparting the above-mentioned swing to the shaft 70 is, for example, as shown in FIG. 4, the swing shaft 7 rotatably supported by the frame via a bearing 74.
A connecting member 78 is connected to the shaft via a ball joint 76 near the end of the drive shaft 30, and a plate cam 80 having a circular shape as a whole is fixed to the drive shaft 30. A cam follower 82 that engages with the peripheral surface of 80 is pivotally mounted. The connecting member 78 is provided with a guide groove 86 for slidably receiving a sliding member 84 fitted to the drive shaft 30, and the connecting member 78 is prevented from moving in the vertical direction by the sliding member 84. You will be guided. The plate cam 80 is
The connecting member 78 is connected via a cam follower 82 that engages with the groove.
to reciprocate in the vertical direction. This movement of the connecting member 78 causes the vibrating shaft 70 to swing about its longitudinal axis, and the vibration of the shaft causes the elevating member 66 to move up and down in order to move the lower jaw 52 up and down.

The movable grip 14 is therefore actuated to clamp the workpiece between the jaws 50, 52 while the fixed grip 16 unclamps the workpiece, as is well known in the art. .

Referring again to FIG. 1, in order to move the workpiece held by the movable grip 14 towards the press, ie towards the fixed grip 16, the base member 44 of the movable grip 14 is moved to the second position. a first actuating device 88 for reciprocating along a path of motion;
A second actuating device 90 is provided for reciprocating the jaw holder 44 along the second movement path.

The first actuating device 88 includes a drum cam 94 extending longitudinally of the frame 12 and fixed to a longitudinal drive shaft 92 driven at the same rotation speed as the transverse drive shaft 30. It includes a cam mechanism and a swing arm 98 connected to the base member 44 via a link member 96.

Link member 96 is disposed along the first path of motion of base member 44 . Further, as shown in FIG. 5, the swinging arms 98 are arranged such that their longitudinal axes form an angle with each other with respect to the link member 96, and one end of the swinging arms 98 is connected to the link member 96 through a pivot shaft 100. and is connected to one end of the link member 96. The other end of link member 96 is connected to mounting portion 1.04 of base member 44 via pivot 102, as clearly shown in FIG.

The first cam mechanism includes a swinging member 110 having a cam follower 108 that engages with the cam groove 106 of the drum cam 74, as shown in FIGS. 5 and 6.

The swinging member 1.10, as clearly shown in FIG. The cam follower 1 is provided with two arm portions 110b and 110c extending parallel to each other from the cam follower 1 on one arm portion 110b.
08 is provided. Therefore, the swinging member 110 vibrates around the shaft 1120 times with a constant amplitude as the drum cam 94 rotates.

The above-described swinging of the swinging member 110 is performed by the swinging arm 9.
A connecting member 114 that communicates with the pivot shaft 1 at one end thereof
16 to the other arm portion 110c, and the other end of the connecting member 114 is connected to the other end of the swing arm 98 via a pivot 118.

As is clear from FIG. 5, the link member 96, the swinging arm 98, and the connecting member 114 constitute a link mechanism, but the movement of the swing arm 98 in the longitudinal direction is restricted in order to hold the link mechanism. There is a need to. Therefore, a control arm 120 is provided as the regulating means. Control arm 120 is positioned along swing arm 98, as clearly shown in FIG. The control arm 120 is swingable at one end of a pivot shaft 122 supported by the frame 12, and the other end of the control arm 120 is pivotable around a pivot shaft 122 supported by the frame 12.
It is pivoted to 8.

As the regulating means, as shown in FIG. 8, a pair of pins 122 for guiding the connecting member 114 in the longitudinal direction can be used instead of the control arm 120, and each pin 122 is connected to the frame. Supported by

A fork member 124, as shown in FIGS. 7 and 9, is provided in association with the swing arm 98 to provide a pivot point for the swing arm. The fork member 124 has a rotating shaft 128 rotatably supported by a bearing member 126, and receives the swing arm 98 in a recess 130.

A guide groove 132 is formed on both sides of the swing arm 98 and extends in the longitudinal direction of the swing arm, as clearly shown in FIG. A guide portion 134 protrudes.

The bearing member 126 that supports the rotating shaft 128 is supported so as to be slidable in the vertical direction along a guide portion 136 provided on the frame 12. An adjustment screw 138 made of a male threaded member rotatably supported by the frame is screwed into the adjustment screw 138.

Therefore, by rotating the adjustment screw 138, the bearing member 126 can be moved up and down along the longitudinal direction of the swing arm 98 integrally with the fork member 124, as shown in FIG. The locking mechanism 140 provided between the frame 12 and the bearing member 126 allows the bearing member 126, on which the fork member 124 is rotatably supported, to be positioned at a desired height.

In the first actuating device 88, as described above,
When the drum cam 94 rotates, the rotation of the drum cam 94 causes the member 110 to swing from 0 to the rotation of the shaft 112, and the swing motion is transmitted to the pivot shaft 118 of the arm 98 via the connecting member 114, thereby causing the shaft to swing. The arm 98 swings around the rotation axis 128 of the fork member 124. This swinging of the swinging arm 98 causes the link member 9 to be attached to the swinging arm.
Connected via 6! Base member 44 reciprocates along said first path of motion such that movable grip 14 generally reciprocates along said first path of motion to feed said workpiece material toward said press. do.

When changing the stroke of the movable grip 14 along the first movement path, the height position of the bearing member 126 is changed by operating the adjustment screw 138 while the swing arm 98 is positioned approximately vertically. . By changing the height position of the bearing member 126, the swing arm 98
, that is, the rotation axis 128 of the fork member 124
can be moved along the length of the swing arm 98. By changing the swing fulcrum with respect to the swing arm 98, the swing width at the one end of the swing arm 98 can be changed regardless of the constant movement of the connecting member 114 that transmits the motion to the swing arm 98, and as a result, the swing width at the one end of the swing arm 98 can be changed. The reciprocating stroke of the grip 14 along said first path of motion can be varied.

Details of the second actuating device 90 are shown in FIGS. 10 and 11.
Components shown in the figures and having the same function as in the first actuating device 88 are designated by the same reference numerals as in the first actuating device 88 with a prime added.

In the second actuating device 90, a link member 96' connected to one end of the swinging arm 98 via a pivot 100 is
The screw assembly is disposed along the second path of motion and is adjustable in length along its longitudinal direction. The other end of the screw assembly 96'' is slidably engaged with a guide rod 142 supported by the jaw holder 48 and disposed along said first path of motion, as clearly shown in FIG. Therefore, the entire reciprocating movement of the movable grip 14 along the first movement path causes the link member 96 to
1 is not blocked.

A pair of connecting members 114° arranged parallel to each other are connected to the other end of the swing arm 98 via a pivot shaft 118′. Each connecting member 114', as shown in FIG. 10, consists of a generally rectangular frame-shaped member defining therein a slot 144 extending longitudinally of the member.

The cam mechanism provided in relation to the connecting member 114 is
The plate cam 94 is provided with a plate cam 94° fixed to the drive shaft 92, and sliding members 146 fitted on both sides of the plate cam to the drive shaft 92, which is the rotation axis of the plate cam, and the plate cam 94 is shown in FIG. In the example, it has a boss portion 94a and a pair of eccentric portions 94b. The sliding member 146 is slidably received within the slot using the slot 144 as a guide groove, so that the connecting member 114 can slide in the longitudinal direction with respect to the sliding member 146.

Eccentric portions 9 of the plate cam 94 are provided at both ends of the connecting member 1140.
A row 2148 is provided that can be engaged with 4'b. The roller 148 provided at one end of the connecting member 114° is supported by the pivot shaft 118, and the roller 148 provided at the other end of the connecting member 114'' is supported by a pivot shaft 150 installed between both connecting members 114''. has been done.

A reservoir for holding a link mechanism comprising the link member 96', a swing arm 98° connected to the link member and angularly disposed thereto, and a connecting member 114° connected to the swing arm. The control arm 120 of
It is pivotally connected to the frame 12 via a pivot 122'' at one end and to a pivot 118 at the other end.

As the regulating means, as shown in FIG.
Connecting member 114" instead of control arm 12o°
A pair of bins 122'' supported by the frame can be used to guide the bins in their longitudinal direction.

A fork member 124' receives the swing arm 98' in its recess 130 so as to be relatively slidable in the longitudinal direction of the swing arm 98' to provide a swing fulcrum for the swing arm 98°. The bearing member 126° is rotatably supported by a shaft member 126°.The bearing member 126° is slidable in the vertical direction along a guide portion 136 (see FIG. The fork member 124 can be moved along the swinging arm 98 in the vertical position by a rotational operation.The fork member 124'' can be moved to a desired height position by means of a locking mechanism 140' (see FIG. 1). can be positioned.

In the second actuating device 90'', when the plate cam 94° is rotated in accordance with the drum cam 94 of the first actuating device 88, the plate cam comes into contact with the plate cam via the roller 148 as the plate cam rotates. The connecting member 114 reciprocates in its longitudinal direction with a constant stroke. Due to the movement of the connecting member 114', the swinging arm 98' swings around the rotation axis 12B of the fork member 124. This swinging arm 98°
With the swinging movement of the swinging arm, the link member 96 is attached to the swinging arm.
The jaw holder 48 connected to the first jaw holder 48 is connected to the first
The base member 44 reciprocates along the second movement path in synchronization with the reciprocating movement of the base member 44 along the second movement path.

the second jaw holder 48 relative to the pace member 44;
The reciprocating stroke along the movement path of the link member can be adjusted to a desired value by changing the height position of the fork member 124 by operating the adjustment screw 138, as in the first actuating device 88, and By adjusting the length dimension 96'', the initial position of the jaw holder 48 can be adjusted along said second path of motion.

According to the material supply device according to the present invention.

The swinging arm 124.12 of each actuating device 88.90 by operation of the respective adjusting screw 138, 138 without replacing said cam 44.44'' of the first and second actuating device.
4" can be made variable, thereby allowing the respective reciprocating motions of the base member 44 and the jaw holder 48 to be varied.

Therefore, the workpiece material can be fed to the press accurately and at high speed in a desired zigzag pattern.

In the above description, a material supply device that enables zigzag feeding of a workpiece material has been described, but each of the actuating devices according to the present invention can be used in a material supply device that linearly supplies a workpiece material.

According to the present invention, as described above, it is possible to adjust the feed rate of the workpiece material without replacing the cam, and it is possible to feed the material at high speed and with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing the material supply device according to the present invention, and FIGS. 2 to 5 are respectively the lines 1%%-,,, Tl-Tl, m shown in FIG. 1. -m, IV-IV
, VV, and FIGS. 6 and 7 are cross-sectional views taken along the lines Vl-Vl and ■-Vl shown in FIG. 5, respectively.
Fig. 8 is a drawing similar to Fig. 5 showing another embodiment of the present invention, and Fig. 9 is a cross-sectional view taken along the line - - shown in Fig. 7. 10 is a sectional view taken along line XX shown in FIG. 1, υ is a sectional view taken along line XX shown in FIG. line X1
12 is a cross-sectional view taken along the line -X1(C), and FIG. 12 is a drawing similar to FIG. 10 showing another embodiment of the present invention. 12: Frame, 14: Movable grip, ss
, 90: Actuation device, 96, 96: Link member, 9
4.110; 94.146: Cam mechanism, 98.98
: Swing arm, 114.114 : Connection member, 124.124: Fork member, 120.120°; 122,122°: Regulation means, 1
28.128": Rotating axis. Agent: Patent attorney Nobuyuki Matsunaga (c)

Claims (7)

[Claims] (1) An actuating device that is supported in a reciprocating manner by a frame and that makes a reciprocating movement of a movable grip that clamps a strip-shaped workpiece material to be sent to the press, and that the actuating device moves along a movement path of the movable grip from the movable grip to the press. a swing arm disposed angularly with respect to a link member extending along the link member and having one end pivotally connected to the link member; a fork member having a rotating shaft that is adjustable in position and receives the swinging arm so as to be slidable relative to the swinging arm in the longitudinal direction; regulating means, a connecting member coupled to the other end of the swinging arm by a pivot, and a connecting member pivoting to the pivot via the linking member to swing the swinging arm about the pivot of the swinging fulcrum. (1) A material supply device for a press sump, comprising a cam mechanism for imparting dynamic motion. (2) The material supply device according to claim 1, wherein the regulating means is a control roll arm whose one end is pivotally connected to the frame and the other end is connected to the pivot shaft. (3) The cam mechanism includes a drum cam, a cam follower that engages with a cam groove of the drum cam, and a swinging member pivotally connected to the frame, and the swinging member is pivotally connected to the connection member. A material supply device according to claim (1) comprising: (4) The cam mechanism includes a plate cam and a sliding member fitted to the rotating shaft of the plate cam, and the connecting member includes rollers at both ends that engage with the cam surface of the plate cam, and the connecting member has a roller that engages with the cam surface of the plate cam at both ends. 2. The material feeding device according to claim 1, further comprising a guide groove for slidably receiving the sliding member, and one of the rollers being supported by the pivot shaft. (5) the movable grip is reciprocating along a path of motion toward the press, and the actuator reciprocates the movable grip toward and (2) away from the press. A material supply device according to claim (1). (6) The movable grip includes a base member capable of reciprocating movement along a movement path toward the press, and a base member on the base member capable of reciprocating movement along a movement path perpendicular to the movement path toward the press. a jaw holder supported on the press, the actuating device reciprocating the jaw holder along a path of movement perpendicular to a path of movement toward the press. Feeding device. (7) A material supply device for staggered feeding of workpiece materials to a press, comprising a base member supported on a frame so as to be reciprocally movable along a movement path toward the press, and a a movable grip having a jaw holder supported for reciprocating movement along a path of motion perpendicular to the path of movement; first and second grips for reciprocating the base member and the jaw holder along respective paths of movement; actuators, each actuator being angularly disposed with respect to and pivotally connected at one end to a link member extending along the respective path of motion from the corresponding base member or jawhole fern. a swinging arm; and a rotating shaft that is adjustable in the longitudinal direction of the swinging arm on the frame to constitute a swinging fulcrum of the swinging arm; a fork member into which the receiver is slidably inserted;
means for regulating the movement of the swing arm in the longitudinal direction; a connecting member coupled to the other end of the swing arm by a pivot; and a cam mechanism for imparting a rocking motion to the pivot via the connecting member so as to swing the material in a press sump.