JPS6344455B2 - - Google Patents

Description

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

One of the conventional feeding devices of this type includes a movable grip that can move while holding the workpiece, and a movable grip that holds the workpiece in a fixed position while the movable grip releases the workpiece. There is a material feeding device that has a fixed grip. According to this material supply device, there is no slippage between the workpiece material and each grip, and material can be supplied to the press with high precision.

Incidentally, the movable grip includes a base member supported on a frame and reciprocating along a first linear path toward the press, and a second base member supported on the base and perpendicular to the first linear path. and a jyo holder that reciprocates along a straight path. The jyo holder supports an atsushiyo and a lower jyo that is movable up and down in order to cooperate with the atspajo and hold the workpiece therebetween, and the workpiece held by both jyoes is held by the base member. The resultant movement of the holder and the holder feeds the press along a zigzag path.

Conventionally, in the movable grip, the vertical movement of the lower jaw is provided by a cylinder device. However, it is difficult to operate the cylinder device at high speed in synchronization with the reciprocating motion of the base member and the jaw holder, and for this reason, the conventional movable grip is unsuitable for feeding material at high speed.

In order to increase the speed of the vertical movement of the lower jaw in synchronization with the movement of the base member and the jaw holder, an elevating member that engages with the lower part of the lower jaw is disposed below the base member, and the elevating member It is conceivable that the elevating member may be moved up and down at a fixed position by a cam mechanism in order to give up and down movement to the lower jaw.

However, since the lower jig moves over a wide planar range with the movement of the base member and the jew holder, a large plate member is required as the elevating member to cover this wide planar range. For this reason, the lifting member tends to be deflected in its central portion, making it impossible to maintain a constant vertical motion stroke of the lower jaw, which makes it difficult to reliably hold the workpiece with uniform force. This results in a decrease in the accuracy of material feeding. Furthermore, it is not possible to vertically move the large elevating member at a high speed, which results in the loss of the advantage of increasing the speed provided by the cam mechanism.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a material feeding device that can stagger feed a workpiece material to a press with high accuracy and high speed.

The present invention provides a material feeding device including a movable grip, the movable grip reciprocating along a first linear path toward a press, and a base member reciprocating along a first linear path on the base at right angles to the first linear path. a jyo holder that reciprocates along a second linear path, an atpajyo supported by the jyo holder, and a lower jyo that is movable in the vertical direction for holding a workpiece in cooperation with the atsubashiyo;
an elevating member that engages with a lower portion of the lower jaw and is movable in an up-down direction to provide vertical movement to the lower jaw; and an end of the elevating member that is disposed along a first linear path and that provides vertical movement to the elevating member; a vibration shaft having a flat surface that can be engaged with the vibration shaft and rotatably supported around a longitudinal axis; rotation of the shaft causes the lifting member to move up and down; a cam mechanism that vibrates the shaft around the axis in order to move the shaft up and down, the elevating member is supported by the base member so as to be movable in the vertical direction, and a cam mechanism is provided at the lower part of the lower jaw for smooth movement of the lower jaw holder. A roller is provided that slides on the elevating member to ensure smooth movement of the base member, and rollers are provided at both ends of the elevating member that slide on the flat surface of the vibration shaft to ensure smooth movement of the base member. It is characterized by the presence of

According to the present invention, since the elevating member is movable integrally with the base member along the first linear path, the elevating member is a large plate-like member that covers a wide range of plane movement of the lower jaw. It is possible to use a rod-like member that does not easily bend without using a rod-like member, thereby making it possible to maintain a constant vertical stroke of the lower jaw, and by reducing the weight of the elevating member, it is possible to move it up and down at high speed. I can do it. Furthermore, the rollers provided on the lower jaw and the lifting member enable smooth movement of the base member and the jaw holder. Therefore, according to the present invention, it is possible to perform staggered feeding at high speed and with high precision.

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

In FIG. 1, a material supply device according to the present invention is generally indicated by the reference numeral 10, and although not shown, the material supply device is located close to the press in order to supply a strip of workpiece material to the press. It is installed.

The feeding device 10 includes a frame 12, a movable grip 14 and a fixed grip 16 for clamping the workpiece, both grips 14 and 16 being supported on the frame 12.

The fixed grip 16 is similar to that in the conventional material feeding device, and as is well known in the art, the movable grip 14 holds the workpiece material at a fixed position closer to the press than the movable grip 14. is operated to clamp the workpiece while releasing the workpiece. Preferably, a cam mechanism is used as the actuating device for the fixed grip.

The movable grip 14 includes a base member 20 that extends toward the press and is slidable on a pair of slide shafts 18 supported by the frame 12 at both ends;
a Jyo holder 24 that is slidable on a pair of slide shafts 22 extending perpendicularly to the extending direction of the slide shaft 18 and supported by the base member 20 at both ends;
Equipped with.

An actuating rod 28 is pivotally mounted on the base member 20 and extends parallel to the slide shaft 18 from a first actuating device 26 similar to that in the conventional feeding device. The first actuating device 26 imparts axial reciprocating motion to the actuating rod 28, as is well known in the art, thereby causing the base member 20 to reciprocate.
reciprocates along a first linear path defined by the slide shaft 18.

A guide rod 30 extending parallel to the slide shaft 18 is supported on the jaw holder 24 .
The guide rod 30 is slidably fitted with an end of an actuating rod 34 extending parallel to the slide shaft 22 from a second actuating device 32 similar to that in the conventional feeding device. imparts axial movement to the actuating rod 34 in a manner well known in the art. Therefore, the Jyo holder 24 can slide the slide shaft 2 on the base member 20 without interfering with the above-described reciprocating movement of the base member 20.
reciprocating along a second linear path defined by 2.

The aforementioned reciprocating motion of base member 20 and jaw holder 24 is synchronized to stagger the workpieces held by movable grips 14 along a zigzag path to the press, as is well known in the art. In order to synchronize the reciprocating motion at high speeds, it is preferable to use cam mechanisms for the first and second actuating devices 26, 32.

The base member 20 has the second linear path 22 in its center, as shown in FIG.
It is provided with a slot-shaped elongated hole 36 extending along.
The elongated hole 36 passes through the base member 20 in the vertical direction. A lower jaw guide portion 38 is provided at the center of the jaw holder 24 and is received in the elongated hole 36.
Due to the above-mentioned reciprocating movement, the guide portion 38 reciprocates within the elongated hole 36 together with the reciprocating movement. A pair of guide holes 40 are formed in the guide portion 38, passing through the guide portion in the vertical direction, and a shaft portion 42a of a lower jaw 42 is slidably fitted into the guide holes. Further, above the lower jaw 42, an upper jaw 44 is supported via a conventionally well-known elastic support device (not shown).

A slit 46 extending in the longitudinal direction of the shaft portion is provided at the center of each shaft portion 42a of the lower gear 42, and a support member 48 extending across the slit is supported by the guide portion 38. A spring seat 50 is fixed to the lower surface of the support member 48, and a coil spring 52 disposed in contact with the spring seat is attached to the lower yaw 42 downwardly, that is, at the top yaw 4.
Apply spring force in the direction away from 4. Each shaft part 4
A roller 54 is pivotally attached to the lower end of the roller 2. Each roller 54 has a portion thereof protruding downward from the guide portion 38, and has a rotating shaft 5 along the first linear path.
It has 4a.

Below the base member 22, the roller 5
A rod-shaped lifting member 56 extending along the second linear path 22 is arranged to define the rolling surface of the roller 4. Elevating member 56 slidably receives a shaft member 58 that is fixed to base member 20 and extends below the base member. Therefore, the elevating member 56
is a base member 20 for engaging the roller 54.
The base member 20 is movable up and down relative to the base member 20 and can continue along the first linear path 18 integrally with the base member 20 .

Rollers 60 are pivotally attached to both ends of the elevating member 56, and each roller 60 has a rotating shaft 60a along the second linear path 22. The roller 60 is
It is possible to roll on flat surfaces 62a formed on a pair of vibration shafts 62 arranged along the first straight path 18. Each vibratory shaft 62 is supported at both ends in the frame via bearings 64 and is rotatable about its longitudinal axis, as shown in FIG. a pair of cam mechanisms 66 associated with each vibrating shaft 62 for vibrating the shaft 62 about its longitudinal axis;
is provided.

As shown in FIGS. 3 and 4, the cam mechanism 66 has a swing shaft 68 fixed to the shaft 62 and extending radially outward of the shaft.
and an arm member 7 whose upper end is connected to the swing shaft 68 via a ball joint 70 and extends perpendicularly to the swing shaft.
2. A guide groove 78 is formed at the lower end of the arm member 72 to receive a sliding member 76 rotatably fitted to the drive shaft 74 so as to be relatively slidable in the direction in which the arm member 72 extends. As clearly shown in FIG. 4, a circular plate cam 80 is disposed adjacent to the sliding member 76 and rotates integrally with the drive shaft 74.
Further, a roller 82 that engages with the circumferential surface of the plate cam 80 is attached to the center portion of the arm member 72 via a pivot shaft 84 .

When the cam plate 80 rotates due to the rotation of the drive shaft 74, the arm member 72 provided with a roller 82 serving as a cam follower engages with the circumferential surface of the cam plate.
A reciprocating motion is applied in the longitudinal direction in synchronization with the motion of the base member 20 and the jaw holder 24. This reciprocating movement of the arm member 72 is caused by a sliding member 76 engaging with the guide groove 78 of the arm member.
Guided by.

This reciprocating motion of the arm member 72 causes the pair of vibrating shafts 62 connected to the arm member via the ball joint 70 to vibrate in opposite directions about their respective longitudinal axes. Due to this vibrational movement, each vibration shaft 62 imparts a vertical movement to the lifting member 56 on which the roller is provided via the roller 60 that engages with the flat surface 62a of the shaft. As a result, the lower jaw 42, which is provided with a roller 54 that engages with the lifting member 56, cooperates with the upper jaw 44 to clamp the workpiece therebetween and to release the clamping between the base member 20 and the upper jaw 42. It moves in the vertical direction in synchronization with the movement of the jaw holder 24.

In the feeding device 10 according to the present invention, in order to give vertical movement to the lower jaw 42 of the movable grip 14, the elevating member 56 that moves in the vertical direction supports the jaw holder 24 and moves along the first linear path 1.
A first linear path 18 is supported on a base member 20 that reciprocates along a first linear path 18 and is integral with the base member.
make a reciprocating motion along the Therefore, the base 20
The roller 54 of the lower jyo 42 supported by the guide portion 38 of the jyo holder 24 reciprocating above along the second linear path 22 moves the jyo holder 24
Along with the reciprocating movement along the second linear path 22, the elevating member 56 rolls on the elevating member in its longitudinal direction.

Therefore, a rod-shaped member can be used as the elevating member 56 without using a large plate-like member that covers the entire reciprocating plane range of the base member and the JIYO holder. Changes in the vertical stroke of the lower yaw 42 can be prevented, and as a result, the lower yaw 42 can be moved up and down with a constant stroke.

Therefore, according to the present invention, the movable grip 14 can reliably hold the workpiece material, and the weight of the elevating member can be reduced, so that the elevating member can be moved up and down at high speed and accurately. It can be exercised.

Moreover, the rollers 6 provided at both ends of the elevating member 56 as the base member 20 moves back and forth as described above.
0 rolls on the flat surface 62a of the vibration shaft 62, and the roller 54 provided at the lower part of the lower jyo 42 rolls on the elevating member 56 as the jyo holder 24 reciprocates as described above. The smooth movement of the member 20 and the jaw holder 24 is not hindered, which allows the workpiece to be staggered into the press with high precision and high speed.

[Brief explanation of the drawing]

FIG. 1 is a plan view schematically showing the material supply device according to the present invention, FIG. 2 is a sectional view taken along the line shown in FIG. 1, and FIG. FIG. 4 is a side view showing the cam mechanism according to the invention;
The figure is a sectional view taken along the line - shown in FIG. 12: Frame, 14: Movable grip, 18,
22: First and second straight path, 20: Base member, 24: Jiyo holder, 36: Elongated hole, 3
8: Guide part, 42: Lower axis, 44: Atsushiyo, 54, 60: Roller, 54a, 60a: Rotating shaft, 56: Elevating member, 62: Vibration shaft, 6
2a: Flat surface, 66: Cam mechanism, 68: Swing shaft,
70: Ball joint, 72: Arm member, 80, 82,
76, 78: Cam device.

Claims (1)

[Scope of Claims] 1. A movable grip for holding a strip-shaped workpiece material for feeding the workpiece material to a press,
The movable grip is a base member supported on the frame and reciprocating along a first linear path toward the press, the movable grip extending in a direction perpendicular to the first linear path, and extending in a direction perpendicular to the first linear path. A base member provided with an elongated hole penetrating in the vertical direction, and a lower jaw guide part that is received in the elongated hole,
a jio holder supported by the base member and reciprocating along a second linear path perpendicular to the first linear path; a lower jaw having a rotation axis extending along the axis and having a roller protruding downward from the guide portion; and an attenuator supported by the jaw holder above the lower jaw to cooperate with the lower jaw to clamp the workpiece material. , extending along the second linear path to engage the roller below the base member and supported by the base member for vertical movement;
an elevating member including rollers having rotational axes along the second linear path at both ends; and a flat surface with which the rollers of the elevating member engage, the elevating member extending along the first linear path. and a pair of vibrating shafts rotatably supported about their longitudinal axes, and vibrating the vibrating shafts about their longitudinal axes in order to move the elevating member up and down in order to move the lower jaw up and down. A material supply device for a press, comprising a cam mechanism. 2. The cam mechanism includes a swing shaft fixed to the vibration shaft and extending outward in the radial direction of the vibration shaft, and an arm member connected to the swing shaft via a ball joint and extending angularly with respect to the vibration shaft. , and a cam device for imparting reciprocating motion to the arm member in its longitudinal direction.