JPS6268628A - Material feeding device - Google Patents

Abstract

PURPOSE:To increase the durability of a machine by providing a driven member at one part of a jaw and by arranging the displacement mechanism which gives the displacement corresponding to the material to be worked to the driven member. CONSTITUTION:The jaw holder 12 for moving is abutted to a grip shaft 10 via a rotor 54 and the shaft 10 is fitted to the rocking lever 6 for moving. The jaw holder 28 for fixing is abutted to the grip shaft 26 and the shaft 26 is fitted to the rocking lever 20 for fixing via a rod 24. The eccentric shafts 8, 22 of the rocking lever 6 and 20 vary the gap between the jaws 14, 16 for moving and jaws 30, 32 for fixing and knob for moving respectively. Due to this mechanism having no screw mechanism on the adjusting part, a chattering is hardly caused on the mechanism. Consequently, the durability of the machine is increased with this method.

Description

[Detailed Description of the Invention] Purpose of the Invention [Industrial Application Field] The present invention relates to a material feeding device for a press machine, and more specifically to a gripper-feed type press machine that grips and feeds a workpiece material intermittently. (Relates to a material feeding device equipped with a plate thickness adjustment groove for the material to be processed.

[Prior Art] The thickness of workpieces processed in press working varies, and a gripper-feed type material supply device that appropriately fixes and feeds workpieces with different thicknesses can A displacement device is used that is equipped with a pair of shows that sandwich the material, and adjusts the gap between the shows to accommodate differences in plate thickness. For example, a displacement device is known in which one of a pair of jaws is fixed to a piston of a pressurizing cylinder whose pressurizing position can be freely adjusted, and the pressurizing position is adjusted with an adjustment knob 1 to adjust the gap between a pair of jaws. There is.

[Problems to be Solved by the Invention] However, these conventional material supply devices have had the following problems.

(1) Since the displacement device that adjusts the gap between the pair of shoes is installed in a limited place such as inside the pressurized cylinder, the size of the displacement device is limited, and the strength of the device is sufficiently improved (! !There was nothing I could do.

(2) Since the displacement device is installed above the passageway through which the material to be processed is fed, it is difficult to perform adjustment operations.

(3) In particular, when a mechanism for adjusting the gap between a pair of shows is provided in a moving table that clamps and feeds the workpiece material, this increases the weight and width of the moving table; When the moving table clamps and feeds the material to be processed, there is a problem in that vibration and noise of the machine increase. Furthermore, the heavy weight of the moving table caused looseness in the moving parts, which worsened the feeding accuracy.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and to provide a material supply device that can efficiently and suitably perform adjustments due to differences in the thickness of workpiece materials.

Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the present invention has the following structure as a means for solving the problems. That is, at least one of a pair of jaws that face each other across a feeding path for the strip-shaped material to be processed and grips the material to be processed is mounted on a frame so as to be able to slide in a direction intersecting the feeding path, A cam that is integrally fixed to an input shaft that rotates in synchronization with the press working performed on the workpiece material, and a driven member that engages with the contour of the cam and swings or reciprocates, In the material supply device, a part of the itL moving member is engaged with the jaw, the jaw is moved once by the movement of the driven member, and the workpiece material is clamped and fixed by the pair of shows, The structure of the material feeding device is characterized in that it is provided with a displacement mechanism that applies a displacement to the driven member according to the thickness of the material to be processed, and changes the moving position of the jaw in the sliding direction. That's it.

Here, the means for sliding the shaft is not limited to a swinging lever that engages with a cam and swings, but may also be a lever that engages with a cam and moves back and forth.

In this case, the displacement mechanism may be, for example, a mechanism that changes the length of the reciprocating rod to a predetermined length to change the position of the jaw.

[Function] The material feeding device of the present invention having the above-mentioned configuration has at least one of a pair of jaws that face each other across a feeding path for a strip-shaped workpiece material and that clamps the workpiece material in a direction that intersects the feeding path. The cam is attached to the frame so as to be able to slide, and is engaged with the contour of the cam, giving a displacement according to the thickness of the workpiece material to the driven member that is oscillated or reciprocated, and slides one sliding position of the jaw. direction to adjust the gap between the pair of jaws.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings. The material feeding device in this embodiment is a well-known gripper feed system that repeats the operations of fixing, transferring, releasing, and returning the workpiece material by the movable jaw, and the operations of releasing and fixing the workpiece material by the stationary jaw. Depending on the system, the auxiliary force is configured to feed the work material W to the processing process.

1 to 3 show the configuration of the material supply device according to this embodiment, where FIG. 1 is a cross-sectional view taken along line A-A in FIG. 3 showing the plane of the material supply device, and FIG. is a sectional view taken along line B-8 in FIG. 1.

As shown in the figure, the material supply device of this embodiment is assembled using a frame 1 as a base, and the mechanism for moving the moving jaws is to An input shaft 2 that rotates in synchronization with the press working being performed, a moving cam 4 that is integrally fixed to the input shaft 2 and has a predetermined contour, and a moving cam that engages with the contour of the moving cam 4 and swings. a swinging lever 6, a moving eccentric shaft 8 that swingably supports the moving swinging lever 6, a moving grip shaft 10 that engages one end of the moving swinging lever 6 and transmits the swinging motion; The moving grip shaft 10
a movable jaw holder 12 that engages with a portion of the movable jaw holder 12 to convert the above-mentioned rocking motion into vertical motion; a movable lower jaw 14 fixed to the upper end of the movable show holder 12; and a movable lower jaw 14.
A moving upper jaw 16 that clamps and fixes the pulled material W together with the moving lower jaw 14 is disposed above the moving cam 4. In addition, a fixing cam 18 that is integrally fixed to the input shaft and has a predetermined contour; a fixing swing lever 20 that engages with the contour of the fixing cam 18 and swings; the fixing swing lever; Fixing eccentric shaft 22 that swingably supports 20
, a rod 24 that engages with one end of the fixing swinging lever 20 and transmits the swinging motion, a fixing grip shirt 1 to 26 that engages with one end of the rod 24 and transmits the swinging motion, and the fixing grip. a fixed jaw holder 2B that engages with one end of the shaft 26 and converts the above-mentioned rocking motion into vertical motion; a lower fixed jaw 30 fixed to the upper end of the fixed jaw holder 28;
A fixing-F which is provided above the moving lower jaw 30 and clamps and fixes the material W together with the fixing lower jaw 30.
A section jaw 32 and the like are provided.

The moving cam 4 moves the lower moving jaw 1 with one rotation of the input shaft 2.
The profile is formed such that the lower moving jaw 14 is raised when feeding the material W and lowered when the lower moving jaw 14 returns to its original position.

The moving swing lever 6 has a rotor 34 that engages with the moving cam 4 and is rotatably supported at one end, and has a plate 36 fixed to the other end. A push bolt 38 is screwed onto the plate 36, and the tip of the push bolt 38 is brought into contact with the grip shaft 10 to transmit the swinging motion of the swinging lever 6.

Both ends of the moving eccentric shaft 8 that supports the swinging lever 6 are inserted into the frame 1. It is eccentric to the rotation center 8b as shown in FIG. One end inserted into the frame 1 passes through the frame 1,
A moving knob 40 is fixed to the penetrated portion.

Further, a movable eye plate 42 is fixed to the frame 1 at a position corresponding to the movable knob 40, and the amount of rotation of the movable eccentric @8 can be read. Further, the moving eccentric shaft 8 is fixed to the frame 1 by turning the moving lever 44 screwed onto the frame 1, and the swinging center 8a of the portion through which the moving swinging lever 6 is inserted is fixed at a predetermined position. Ru.

The grip shaft 10 is rotatably supported at both ends by bearings 46 and 48 on the frame 1, and a semicircular recess is provided in the portion that engages with the push bolt 36, so that the swing lever 6 for movement can swing. The structure ensures that motion is transmitted. Further, a semicircular recess 10a is provided in the portion that engages with the lower movable jaw holder 12 in the direction of movement of the lower movable jaw holder 12, and the grip shaft 10
It has a structure that reliably transmits the vibrations of the

The moving jaw holder 12 is inserted into the moving table 50 so as to be able to move up and down, and is configured to be located below the feeding center of the material W. The movable table 50 is supported reciprocally by two par guides 52a and 52b whose ends are inserted through the frame 1, and is driven by a crank arm 53 attached to one end of the input shaft 2. At the bottom of the movable jaw holder 12, there is a recess 1 of the movable grip shaft 10.
A rotor 54 that rolls on the grip shaft 10 and transmits the swinging motion of the grip shaft 10 is rotatably supported. Furthermore, the movable jaw holder 12 is urged downward by a spring 55.
reliably follows the swinging motion of the four semicircular parts 10a provided on the moving grip shaft 10.

The moving upper jaw 16 is connected to a cylinder 5 pressurized by fluid pressure.
The movable upper jaw 16 is fixed to the piston 58 of No. 6, and is configured so that the position of the moving upper jaw 16 remains constant during pressurization. When the pressure is released, the movable upper jaw 16 is raised by the piston 58 urged upward by the spring 60, and the gap with the movable lower jaw 14 is widened, allowing the material W to be easily replaced.

The fixing cam 18 causes the fixed lower show 30 to move up and down once by one rotation of the input shaft 2, and is lowered when the fixed lower show 30 or the movable base 50 moves forward, and is raised when the movable base 50 moves backward. The contours are formed so that

A rotor 62 that engages with the fixing cam 18 and is rotatably supported is attached to the fixing swing lever 20 substantially at the center thereof. A protrusion 20a is formed at one end of the fixing swing lever 2o, and the protrusion 20a is brought into contact with one end of the rod 24. A fixed eccentric shaft 22 is inserted through the other end of the fixed swing lever 20.

Both ends of the fixed side eccentric shaft 22 are inserted into the frame 1 in the same way as the moving eccentric shaft 8, and the swing center 22a of the part through which the fixed swing lever 20 is inserted and the both ends inserted into the frame 1 are It is eccentric to the rotation center 22b. One end inserted into the frame 1 passes through the frame 1, and a fixing knob 64 is fixed to the penetrating portion. In addition, the frame 1 has a fixing scale plate 66 at a position corresponding to the fixing knob 64.
is fixed, and the amount of rotation of the fixing eccentric shaft 22 can be read. Further, the fixing eccentric shaft 22 is fixed to the frame 1 by turning the fixing lever 68 screwed onto the frame 1, and the swing center 22a of the part through which the fixing swing lever 20 is inserted is fixed at a predetermined position. Ru.

The rod 24 is inserted into the frame 1 in a reciprocating manner, one end of which engages with the protrusion 20a of the fixing swing lever 20, and the other end of which is inserted into the frame 1 into a semicircular shape via an adjustment bolt 70 screwed into its tip. It is in contact with a surface 26a of the fixing grip shaft 26 formed in the. The adjustment bolt 70 is set at a position that is offset from the axial center of the fixing grip shaft 26 by a predetermined amount.
a, so when the rod 24 reciprocates due to the swinging motion of the fixing swing lever 20, the fixing grip shaft 26 swings, and this movement is fixed by the other end formed in a semicircular shape. The information is transmitted to the show holder 28 for use.

The fixing grip shaft 26 is swingably inserted into the frame 1, converts the reciprocating motion of the rod 24 into swinging motion, and gives vertical movement to the fixing show holder 28 with one end formed in a semicircular shape.

The fixing jaw holder 28 is inserted into the feeding center of the material W so as to be movable up and down within the frame 1. A recess 28a is located approximately in the center of the vertically movable fixing show holder 28.
is formed, and the recess 28a and the fixing grip shaft 2
6 is engaged with one end. Fixed lower show holder 2
A spring 72 is provided at the bottom of 8, and is biased upward by the spring 72. Therefore, when the rod 24 reciprocates, the fixing grip shaft 26 swings, and following this swing, the lower fixing jaw 3 moves together with the fixing show holder 2B.
0 moves up and down.

The fixed upper jaw 32 is fixed to the piston 76 of the cylinder 74 which is pressurized with fluid pressure in the same way as the movable upper show 16, and the fixed upper jaw 32 is configured to remain at a constant position when pressurized. ing.

When the pressure is released, the upper fixing jaw 32 is raised by the piston 76 urged upward by the spring 78, and the gap with the lower fixing jaw 30 is widened, allowing the material W to be replaced easily.

Next, the operation of this embodiment will be explained. The material W is moved between the upper and lower jaws 14 and 16 and the upper and lower jaws 3 for fixation.
The operator turns the moving knob 40 and the fixing knob 64 to make adjustments according to the thickness of the material W according to the scales marked on each height plate 42.66. By turning the moving knob 40, the moving eccentric shaft 8
is rotated about the rotation center 8b, thereby the swing center 8a of the moving swing lever 6 moves around the rotation center 8b, which causes the push bolt 36 to swing and the moving grip shaft 10 to move. Rotated. Therefore, the movable show holder 12 is moved up and down, and the gap between the movable lower jaw 14 and the movable upper jaw 16 is adjusted to a gap that corresponds to the thickness of the material W.

Similarly, by turning the fixing knob 64, the fixing eccentric shaft 22 is rotated about the rotation center 22b, so that the pivot center 22a of the fixing swing lever 20 is moved from the rotation center 22b.
b, and the fixing grip shaft 26 is rotated via the rod 24. Therefore, the fixing show holder 28 is moved up and down, and the gap between the lower fixing jaw 30 and the upper fixing jaw 32 is set to a gap corresponding to the thickness of the material W.

Next, when the press machine body starts operating, the input shaft 2 rotates in synchronization with the press h loe. Along with this rotation, the moving cam 4 and the fixing cam 18 rotate, and the moving swing lever 6 and the fixing swing lever 20 swing according to the contours of the respective cams. The movable swing lever 6 swings via the movable grip shaft 10, while the fixed swing par 20 swings via the rod 24 and the fixed grip shaft 26, and the movable lower jaw holder] 2 and the fixed lower jaw holder as vertical movements. Further, the material W is held between the upper moving jaw 16 and the lower moving jaw 14, and is fed by the moving table 50 that reciprocates. The feeding is performed by the moving upper and lower jaws 14 when the moving table 50 moves forward.
This is done by holding the material W between 16 and 16. Mobile platform 50
During the return movement, the material W is clamped by the fixing upper and lower shows 30 and 32, and the material W is fixed.

According to the material supply device of this embodiment configured as described above, the gap between the upper jaw 3-16.32 and the lower jaw 14.30 can be adjusted according to the thickness of the material W by turning the knob 40.64. It can be done easily and accurately by turning it according to the timing. Further, since the knobs 40 and 64 are attached to the side of the frame 1, they are easy to operate. Moreover, I
It can be adjusted even while the machine is running, and the material 1! ! It is also possible to make adjustments while observing the feeding state of W.

Since no screw mechanism is used in the adjustment part, play is less likely to occur. Thus the durability of the machine is improved.

In addition, since the gap between the upper jaw 16.32 and the lower jaw 14.30 is adjusted by a fixed part, the weight of the moving part is reduced, and the occurrence of machine turbulence and noise due to movement is reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it goes without saying that the present invention can be implemented in various forms without departing from the gist of the present invention.

Effects of the Invention As detailed above, the material supply device of the present invention has a simple structure and can easily adjust the gap between the upper jaw and the lower jaw according to the thickness of the material to be processed. This greatly improves the durability of the machine and allows the gap to be adjusted properly at all times.

Furthermore, since the gap between the upper show and the lower show is adjusted by the fixed part, the weight ω of the moving part is lightened, and vibration and noise of the machine due to movement are reduced. This prevents backlash from occurring in the moving parts and improves the durability of the machine.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 and 2 are cross-sectional views showing the configuration of a material supply device as an embodiment of the present invention, and FIG. 3 is a sectional view of the material supply device as an embodiment of the present invention. This is a plan view. W...Material 1...Frame 2...
Input shaft 4...Movement cam 6...Movement swing lever 8...Movement eccentric shaft 18...Fixation cam 20...Fixation swing lever 22...Fixation eccentric shaft

Claims (1)

[Scope of Claims] 1. A frame configured to slide at least one of a pair of jaws that face each other across a feed path for a strip-shaped workpiece material and that grip the workpiece material in a direction intersecting the feed path. A cam that is attached to the input shaft and is integrally fixed to an input shaft that rotates in synchronization with the press working performed on the workpiece material, and a driven member that engages with the contour of the cam and swings or reciprocates. A material supply device comprising: a part of the driven member is engaged with the jaw, the jaw is slid by the movement of the driven member, and the workpiece material is clamped and fixed by the pair of jaws. A material feeding device comprising: a displacement mechanism that applies a displacement to the driven member according to the thickness of the workpiece material and changes the sliding position of the jaw along the sliding direction. 2. The driven member is a swinging lever that engages with the contour of the cam to swing and transmits the swinging motion to the jaw, and the displacement mechanism is arranged between the swinging center of the swinging lever and the swinging center. The material supply device according to claim 1, which is an eccentric shaft provided eccentrically and having a rotation center that displaces the swing center.