JPH0244901Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a gripper feeder, and more specifically, a gripper feeder for feeding a strip of material to a press. It has a first gripper ram mechanism for gripping the strip-shaped material and moving it forward in the feeding direction, and a second gripper ram mechanism that always grips the strip-shaped material when the press is in the processing process, and the first gripper ram mechanism The present invention relates to a gripper feeder in which the forward and backward movement timing of the mechanism can be finely adjusted according to conditions such as processing requirements and the thickness of the strip material.

<Prior Art> As is well known, in press processing and the like, various feeders are used to feed strip-shaped materials in accordance with the processing tact of the press.

There are various types of feeders of this type, and one of them is the gripper feeder proposed in, for example, Japanese Patent Publication No. 10336/1982 and Japanese Patent Application Laid-open No. 147439/1983. When the press ram on the press side is not in the processing stroke, the gripper feeder grabs the strip material and moves it forward in the feed direction, while when the press is in the processing stroke, it retreats in the opposite direction to the feed direction. a first gripper ram mechanism in preparation for the next feeding operation, and a press ram on the press side that grips the strip material when it is in the processing stroke and releases the strip material for a short period during the pressurization stroke during the processing stroke; a second gripper ram mechanism that opens the strip material when the press side is in a non-processing process and allows the first gripper ram mechanism to perform a feeding operation, and the first gripper ram mechanism is moved back and forth along the feeding direction It has a slider mechanism that allows you to The gripping and ungripping operations of the first gripper ram mechanism and the second gripper ram mechanism, and the operation of moving the first gripper ram mechanism back and forth along the feeding direction of the strip material, are performed in order to save energy and to reduce the size of the material. In order to meet the demand, a single motor is used.

<Problems to be solved by the invention> In order to feed the strip material with high precision in accordance with the processing requirements of the press, the timing of the grips and ungrips of the first gripper ram mechanism and the second gripper ram mechanism must be carefully adjusted. need to be controlled. In addition, the first and second
It is necessary to move the first gripper ram mechanism forward or backward in a timely manner in accordance with the grip and ungrip timings of the first gripper ram mechanism.

In the case of the conventional grits per feeder mentioned above,
A cam is used to transmit the driving force of a single motor provided as the motive power for vertically moving the first and second gripper ram mechanisms. Therefore, by appropriately selecting the cam curves of these cams, the timing of the gripping and ungripping operations of the first and second gripper ram mechanisms can be freely set.

However, in the case of the above-mentioned conventional technology, the above-mentioned first
The means for moving the gripper ram mechanism forward or backward is not configured so that the forward and reverse movement timings can be set individually and freely. For this reason, conventionally,
It is not possible to individually and delicately set the first gripper ram mechanism to move forward or backward in accordance with the timing of gripping and ungripping of the first gripper ram mechanism and the second gripper ram mechanism. Ta.

This invention was created in view of the above problems.
It is an object of the present invention to enable individual and delicate setting of moving the first gripper ram mechanism forward or backward in accordance with the grip and ungrip timings of the first and second gripper ram mechanisms. do.

<Means for Solving the Problems> The gripper feeder of the present invention grasps the strip-shaped material and moves it forward in the feeding direction when the press ram on the press side is not in the processing process.
When the press is in the machining process, it retreats to the opposite side of the feed direction and prepares for the next feed operation.
When the press ram on the press side is in the machining process, it grips the strip material, releases the strip material for a short period of time during the pressurizing process, and when the press side is not in the machining process, it grips the strip material. A gripper feeder comprising a second gripper ram mechanism that opens and allows the first gripper ram mechanism to perform a feeding operation, and a slider mechanism that moves the first gripper ram mechanism back and forth along the feeding direction, A single motor 7 is provided as a drive source for the gripper feeder 1, and the rotational movement of the single motor 7 is transferred to the first gripper ram mechanism 3 through a clip cam 16 and a release cam 17.
and a driving force transmission mechanism that transmits the driving force to the second gripper ram mechanism 4 and moves the first and second gripper ram mechanisms 3 and 4 in the vertical direction by the driving force of the single motor 7; an eccentric mechanism 30 that converts the rotational motion of the motor 7 into a linear motion and moves the first gripper ram mechanism 3 back and forth along the feeding direction 5 of the strip material using the driving force of the motor 7; a first cam 31a provided in a rotation system that transmits the rotational motion of the gripper ram mechanism 3 to the eccentric mechanism 30, and for advancing the first gripper ram mechanism 3 by the driving force of the single motor 7; The parallel cam 31 includes a second cam 31b for retracting the first gripper ram mechanism 3 by the driving force of the motor 7.

<Operation> A parallel cam 31 having a first cam 31a and a second cam 31b is interposed in a system that transmits the rotational motion of a single motor 7 to the eccentric mechanism 30, and the first cam 31a transmits the rotational motion of the motor 7 to the eccentric mechanism 30. The rotational movement transmitted by the second cam 31b causes the first gripper ram mechanism 3 to move forward, and the rotational movement transmitted by the second cam 31b causes the first gripper ram mechanism 3 to move backward. Therefore,
By forming the cam curves of these cams 31a and 31b in accordance with the required machining characteristics, the first
The forward timing and reverse timing of the gripper ram mechanism 3 can be individually and delicately set.

<Embodiments> Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a gripper feeder, which is provided as a device for feeding a strip material 2 to a press (not shown), and a first gripper ram mechanism 3 and a second gripper ram mechanism 4 are installed above the feeder, respectively. It is provided.

The first gripper ram mechanism 3 grabs the strip material 2 and moves it forward in the feeding direction (direction shown by arrow 5) when the press ram of the press is not in the processing stroke, and when the press ram is in the processing stroke. , and is configured to release the gripped strip material 2 and retreat to the opposite side in the feeding direction 5 in preparation for the next feeding operation.

On the other hand, when the press ram is in the processing process, the second grit per ram mechanism 4
is gripped and fixed, and during the non-processing process, the strip material 2 is released to enable the feeding operation by the first gripper ram mechanism 3, and even during the processing process of the press ram, it is not gripped when this press ram is in the pressurizing process. It is configured to release the strip of material 2 that is released.

Each operation of the first and second gripper ram mechanisms 3 and 4 transfers the driving force of a single motor 7 disposed on the side surface of the main body casing 6 to the first gripper ram mechanism 3 through a transmission system. and is transmitted to the second gripper ram mechanism 4 for execution.

That is, as shown in FIG. 3, the driving force of the motor 7 is transmitted via the belt 8 to a pulley 10 fixed to one end of the first rotating shaft 9. As shown in FIG. The first rotating shaft 9 is rotatably supported by a bearing with respect to the main body casing 6 (all the following rotating shafts are also rotatably supported with respect to the main body casing 6 by bearings). ), and a bevel gear 11aa is fixed to the other end. This bevel gear 11a is meshed with a bevel gear 11b fixed to one end of a second rotation shaft 12 orthogonal to the first rotation shaft 9. On the other hand, a worm gear 13 is fixed to the other side of the second rotating shaft 12, as shown in FIG.
This worm gear 13 and a worm gear 15 fixed to one end of a cam drive shaft 14 orthogonal to the second rotating shaft 12 mesh with each other.

As shown in FIG. 5, a clip cam 16 and a release cam 17 are fixed on the shaft of the cam drive shaft 14, and spherical cam hollows 18 and 19 abut against these cams 16 and 17, respectively. There is. The cam hollow 18 is rotatably attached to the lower end of the first gripper ram mechanism 3, and the cam hollow 19 is rotatably attached to the lower end of the second gripper ram mechanism 4.

The first gripper ram mechanism 3 and the second gripper ram mechanism 4 are provided with an upper grip body 20 and a lower grip body 21,
A strip material 2 is sandwiched between these. The upper grip body 20 is attached to a piston 22 supported by a piston shaft 23, and is constantly biased downward. and,
Its vertical position is configured to be freely adjustable.

On the other hand, the lower grip body 21 is attached to the upper end of a lower ram 24 that is slidably disposed within a guide 25, and the cam hollow is rotatably disposed at the lower end of this lower ram 24. ing. Further, a spring 26 is disposed on the lower ram 24, and is constantly urged downward by the spring 26. When moved upward by the clip cam 16 and the release cam 17, the lower grip body 21 moves upward and cooperates with the upper grip body 20 to sandwich the strip material 2. Next, 27 is the vertical movement guide section 2
This is a vertically movable guide rod that is slidably disposed within the upper grip body 8 and is provided to guide the upper grip body 21 in the vertical direction.

The first gripper ram mechanism 3 and the second gripper ram mechanism 4 grip the strip material 2 when the lower ram 24 is moved up and down by the clip cam 16 and the release cam 17, or ungrip it. Because it is configured in such a way that it is possible to
These clip cams 16 and release cams 1
By changing the cam curve 7, the grip timing and ungrip timing can be freely and subtly changed.

Further, as described above, the first gripper ram mechanism 3 is configured to be able to grip and ungrip the strip-shaped material 2, and to advance the gripped strip-shaped material 2 along the feeding direction 5. There is. The forward and backward movement of this first gripper ram mechanism 3 is carried out by the motor 7.
The driving force of is transmitted to another rotating system 29, and this rotating system 2
9 is converted into a reciprocating motion by the eccentric mechanism 30, and the first gripper ram mechanism 3
I am trying to make it move forward and backward.

That is, as shown in FIG. 3, a parallel cam 31 consisting of a first cam 31b is fixed on the second rotating shaft 12. This parallel cam 31 is engaged with a parallel cam hollow 33 fixed on a third rotation shaft 32 arranged parallel to the second rotation shaft 12. As a result, when the second rotation shaft 12 is rotated,
The rotational motion is transmitted to the third rotating shaft 32 via the parallel cam 31 and the parallel cam hollow 33, causing it to rotate.

A bevel gear 34 is provided at one end of the third rotating shaft 32.
a is fixed, and this bevel gear 34a and another bevel gear 34b mesh with each other. Bevel gear 34
b is fixed to one end of the slider drive shaft 35 that is orthogonal to the third rotation shaft 32. Further, as shown in FIG. 5, a rotating plate 36 is fixed to the other end of the slider drive shaft 35. The eccentric mechanism 3 is located at a distance t from the center of rotation on the rotary plate 36.
An eccentric shaft 37 constituting 0 is installed. Further, one end of a gripper slider 38 is rotatably engaged with the eccentric shaft 37, and the other end is connected to the first gripper ram mechanism 3 via a connecting shaft 40.
It is rotatably connected to an engagement arm 39 protruding from the side surface of.

Next, 41 is a longitudinal movement guide rod for guiding the first gripper ram mechanism 3 along the feeding direction, and 42 is a slider for sliding the longitudinal movement guide rod 41.

Next, the operation of the embodiment will be explained based on the above configuration.

Since the gripper feeder 1 of this embodiment is configured as described above, if a drive switch (not shown) is turned on and a single motor 7 is operated, its driving force will be used to drive the first and second motors. The first gripper ram mechanisms 3 and 4 can be gripped and angripped, and the first gripper ram mechanism 3 can be moved back and forth along the feeding direction 5 of the strip material 2.

In other words, the driving force of the single motor 7 is the belt 8
It is transmitted to the first rotating shaft 9 via the pulley 10 and rotates it. As shown in FIG. 3, a bevel gear 11a is fixed to the other end of the first rotating shaft 9, and a bevel gear 11a is fixed to one end of the second rotating shaft 12. Bevel gear 11b
are interlocking. Therefore, the first rotation axis 9
The rotational motion is transmitted to the second rotation shaft 12, causing it to rotate.

A worm gear 13 is fixed on the second rotating shaft 12. Further, as shown in FIGS. 4 and 5, a worm gear 15 fixed on the cam drive shaft 14 meshes with the worm gear 13. As a result, the rotational movement of the second rotation shaft 12 is transmitted to the cam drive shaft 14, causing it to rotate.

Cam drive shaft 14 rotated in this way
A clip cam 16 and a release cam 17 are fixed on the top, and these cams 16 and 17 have a first
and cam hollows 18, 1 disposed at the lower ends of the lower rams 24 of the second gripper ram mechanisms 3, 4.
9 is in contact. Therefore, the cam drive shaft 14
As the lower ram 24 rotates, the lower ram 24 moves up and down according to the cam curves of the respective cams 16 and 17. Thereby, it is possible to grip and ungrip the strip material 2 passed between the upper grip body 20 and the lower grip body 21.

On the other hand, as shown in FIG. 3, the rotational movement of the motor 7 is transmitted to another rotational system 29, causing the first gripper ram mechanism 3 to move back and forth along the feeding direction 5 of the strip-shaped material 2. That is, the rotational motion of the second rotation shaft 12 is transmitted to the third rotation shaft 32 via the parallel cam 31 and the parallel cam hollow 33. As a result, the third rotating shaft 32 rotates, and the rotational motion is transmitted to the slider drive shaft 35 via the bevel gears 34a and 34b, causing it to rotate. Therefore, this slider drive shaft 35
A rotary plate 36 fixed to rotates.

This rotating plate 36 and the first gripper ram mechanism 3
are connected to each other via a gripper slider 38, and the gripper slider 38 is mounted at a position offset from the center of rotation of the rotating plate 36 by a distance t. Therefore, when the rotary plate 36 rotates, the first gripper ram mechanism 3 reciprocates on the back-and-forth movement guide rod 41, making it possible to advance the strip-shaped material 2 along the feeding direction 5.

In this way, the gripper feeder 1 of the embodiment operates the first and second
The gripper ram mechanisms 3 and 4 of the first gripper ram mechanism 3 and 4 are gripped and ungripped, or the first gripper ram mechanism 3 is moved back and forth along the feeding direction 5 of the strip material 2, but it is not limited to these. Press operation timing, press characteristics,
It is possible to make fine adjustments according to the characteristics of the strip material 2, the required processing characteristics of the processed product, etc.

That is, as shown in FIG. 6, when the crank stroke on the press side enters the processing stroke a, the second gripper ram mechanism 4
The first gripper ram mechanism 3 ungrips the strip of material 2. And the first
When the gripper ram mechanism 3 is in the ungrip state, it retreats in the opposite direction to the feed direction 5 to prepare for the next feed operation.

Also, the second gripper ram mechanism 4 releases the gripped strip material 2 once the press side is in the pressurizing stroke during the gripping period. Then, when the press side is in period 6 other than the machining process, the first gripper ram mechanism 3
grips the material strip 2, and at this time the second gripper ram mechanism 4 ungrips the material strip 2. The first gripper ram mechanism 3 also moves forward along the feed direction 5 while gripping the strip of material 2 in this manner to move the strip of material 2 in that direction. When feeding the strip material 2, the second gripper ram mechanism 4 is in the ungrip state as described above, so the feeding operation is not hindered.

Since the feeding of the strip material 2 is performed in this way, the grip timing and ungrip timing of the first and second gripper ram mechanisms 3 and 4 and the first gripper ram mechanism 3 are controlled.
It is necessary to delicately adjust the forward and backward movement timing of each in relation to each other.

Among these timings, the grip timing and ungrip timing of the first and second gripper ram mechanisms 3 and 4 are determined by the clip cam 16.
By changing the cam curve of the release cam 17, it can be set freely and delicately.

In addition, in the case of the gripper feeder 1 of this embodiment, when transmitting the rotational motion of the single motor 7 to the eccentric mechanism 30, the parallel cam 31
, the forward timing and reverse timing of the first gripper ram mechanism 3 can be freely and delicately set.

To explain this specifically, the first gripper ram mechanism 3 is
By changing the cam curve of the first cam 31a, if the rotational movement transmitted by the second cam 31b is used to advance the first cam 31a, and the second cam 31b causes the second cam 31b to move the second cam 31b forward. The forward timing of the first gripper ram mechanism 3 can be freely and delicately set.

Furthermore, by changing the cam curve of the second cam 31b, the backward movement timing of the first gripper ram mechanism 3 can be similarly set freely and delicately.

In this way, the forward timing and reverse timing of the first gripper ram mechanism 3 can be individually and delicately adjusted. It becomes possible to feed the strip material 2 with high precision in accordance with the timing.

<Effects of the invention> As described above, the present invention provides a system for transmitting the rotational motion of a single motor 7 to the eccentric mechanism 30 by interposing a parallel cam 31 having a first cam 31a and a second cam 31b. The first gripper ram mechanism 3 is advanced by the rotational movement transmitted by the first cam 31a, and the second gripper ram mechanism 3 is moved forward.
The rotational movement transmitted by the cam 31b causes the first
Since the gripper ram mechanism 3 is configured to move backward, the forward timing and backward timing of the first gripper ram mechanism 3 can be individually changed by changing the cam curves of these cams 31a and 31b. Therefore, when setting the forward timing and reverse timing of the first gripper ram mechanism 3, they can be set independently of each other, so each operation timing can be set freely and delicately. Therefore, it is possible to perform the optimum feed according to the characteristics of the press, the characteristics of the strip material 2, and the required processing characteristics of the processed product, thereby increasing the processing speed of the press or improving the processing accuracy. make it possible to In addition, since the timing of each operation can be finely adjusted, the material can be fed at any angle from 150° to 120° to 90° without being restricted to 180° with respect to the crankshaft angle of the press.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, in which Fig. 1 is a plan view, Fig. 2 is a side view, and Fig. 3 is a Y--
4 is a sectional view taken along line Y, FIG. 4 is a sectional view taken along line Z-Z in FIG. 1, FIG. 5 is a sectional view taken along line X-X in FIG. 1, and FIG. 6 shows feed timing. It is a diagram. In addition, in the figure, 1...Gritzper feeder, 2
...Band-shaped material, 3...First gripper ram mechanism, 4...Second gripper ram mechanism, 5...Feeding direction, 7...Motor, 16...Clip cam,
17...Release cam, 29...Rotation system, 30...
...Eccentric mechanism, 31...Parallel cam, 31a...First cam, 31b...Second cam 31b. are shown respectively.

Claims (1)

[Claim for Utility Model Registration] When the press ram on the press side is not in the processing stroke, it grasps the strip material and moves it forward in the feeding direction, and when the press is in the processing stroke, it is moved to the opposite side of the feeding direction. The first gripper ram mechanism retreats and prepares for the next feeding operation, and the press ram on the press side grasps the strip material when it is in the processing stroke, and releases the strip material for a short period during the pressurization stroke during the processing stroke. At the same time, when the press side is in a non-processing process, a second gripper ram mechanism that opens the strip material and allows the feed operation by the first gripper ram mechanism, and a second gripper ram mechanism that moves the first gripper ram mechanism back and forth along the feeding direction. In the gripper feeder equipped with a slider mechanism, a single motor 7 is provided as a drive source for the gripper feeder 1, and the rotational movement of the single motor 7 is transmitted through a clip cam 16 and a release cam 17. drive which is transmitted to the first gripper ram mechanism 3 and the second gripper ram mechanism 4, and moves the first and second gripper ram mechanisms 3, 4 in the vertical direction by the driving force of the single motor 7. a force transmission mechanism; and an eccentric mechanism that converts the rotational motion of the single motor 7 into a linear motion and uses the driving force of the motor 7 to move the first gripper ram mechanism 3 back and forth along the feeding direction 5 of the strip material. 30, provided in a rotation system that transmits the rotational movement of the single motor 7 to the eccentric mechanism 30,
A first cam 31a for advancing the first gripper ram mechanism 3 by the driving force of the single motor 7; and a first cam 31a for retracting the first gripper ram mechanism 3 by the driving force of the single motor 7. A parallel cam 31 consisting of a second cam 31b
A grits per feeder comprising: