JPS5847248B2 - Pitch feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic sheet material feeding device for continuously transporting sheet materials to be processed at a preset pitch.

The object of the present invention is to position the sheet material by using at least two pilot holes provided in the sheet material, and in that state to perform continuous pressing, etc. at a preset pitch. The present invention provides an automatic feeding device for sheet materials that can be carried into a machine, thereby making it possible to efficiently feed sheet materials to machine tools.

The present invention will be described in detail below with reference to an illustrated embodiment.

In the figure, reference numeral 1 denotes a forward/backward moving mechanism, and an elevating table 3 is installed on the upper part of a pedestal 2.

A plurality of lift racks 4 are provided below the lifting table 3, and a drive shaft 5 is supported near the lift racks 4 in a direction perpendicular to the lift racks 4.

The drive shaft 5 has a pinion 6 that meshes with the lift rack 4.
and a pinion 8 that meshes with a drive rack 7 provided in the horizontal direction are fixed to each other (these racks 4,
70 and the tip of the piston rod 9a of the lift cylinder 9 is connected to the drive rack 7.
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The lift cylinder 9 is attached to a part of a support plate 10 provided on the pedestal 2, and a compression spring 11 for biasing the piston 9b toward the head side is housed inside.

Even if a fluid supply pipe 12 such as air is connected to the head side of the lift cylinder 9, by supplying fluid from this fluid supply pipe 12 to the head side of the lift cylinder 9,
The elevating table 3 is lowered, and by stopping the fluid supply, the elevating table 3 is raised by the action of the compression spring 11 to a temperature of .degree.

Note that 13 is a limit switch that detects the completion of lowering of the lifting table 3, and when this limit switch 13 is turned on, activation of a feed mechanism 14, which will be described later, is started.

Further, a back-and-forth movable table 15 is provided on the elevating table 3.

Both sides of the back and forth movable table 150 extend outward from both side edges of the elevating table 30 (thereby, rows 216 guided by both side edges of the elevating table 30 are rotatably supported on the lower surface, and these rollers 16 This allows the back-and-forth moving table 15 to smoothly move back and forth in the direction of arrow a-1) with respect to the lifting table 3.
A positioning plate 17 is provided on the upper rear surface of the L.5 at a distance in the width direction.

These positioning plates 17 have long holes 17a along the longitudinal direction.
By tightening the setscrews 18 inserted through these elongated holes 17a to the back-and-forth movable table 15, each positioning plate 17 can be fixed at an arbitrary angle. A pilot pin 20 that fits into a hole 19a opened in the sheet material 19 to be used is bored.

That is, by inserting these pins 20 into the holes 19a of the sheet material 19, the sheet material 19 can be positioned with respect to the longitudinally movable chiffle 15.

On the other hand, a feed mechanism 14 is installed on the upper part of the pedestal 2 at the forward end of the forward and backward movable table 15.

The feed mechanism 14 feeds the sheet material 19 in the feed direction (first
A guide member 21 as shown in FIG.
It has 22 and 23 and is L.

Of these guide members 21 and 23, guide member 2
1 and 23 are attached to a support block 24 installed on the frame 2 so as to be located outside and parallel to each other, and the remaining guide members 22 are attached movably along the inside of the guide member 21. Ru.

Push bolts 2 are arranged alternately in the longitudinal direction on the outside of the guide member 21.
By adjusting these push bolts 25 and pull bolts 26, the position of the guide member 22 can be adjusted. A slider 2T is housed between the guide members 23.

On the guide member 22 side of the slider 27, a fixed guide roller 28 is rotatably supported in contact with the slider 27 and guided in transfer. On the opposite side, a movable guide roller 29 is rotatably supported in contact with the guide member 23 and guided in transfer. L is supported freely.

The shaft rod 30 that supports the movable guide roller 29 is slightly movable in the direction toward and away from the guide member 23, and the compression spring 31 that biases the shaft rod 30 causes the movable guide roller 29 to move toward the guide member. At the same time as it is pressed against 23 and becomes L,
A guide roller 32 that supports a load in the radial direction is supported at the bottom of the slider 27.

As a result, the slider 27 moves along the guide rollers 22 and 23 in the feed direction (
It is now possible to move back and forth in the direction of arrow C).

-Then, the lower jaw 33a of the gripper hook is fixed to the front end of the upper part of the slider 27.

An upper jaw 33M1'' is provided above the lower jaw 33a so as to be able to rotate once, and the tip of a piston rod 34a of a gripper cylinder 34 mounted on the slider 27 is pivoted at the base end of the upper jaw 33b. It was worn (・te,
By moving the tip of the upper jaw 33b downward by the gripper cylinder 34, one end of the sheet material 19 to be transferred between the upper jaw 33b and the lower jaw 33a can be gripped.

Further, a ratchet pawl 36 is provided at the bottom of the slider 27, the base end of which is supported by a pin 35.

This ratchet pawl 36 is provided with a downwardly engaging portion 36a on the distal end side and a roller 37 on the side thereof, and the distal end is urged downward by a compression spring 38, and the distal end is urged downwardly by the slider 2T. It is adapted to be removably engaged with a pitching cam 39 provided in the.

The pitching cam 39 is inserted through a threaded rod 40 horizontally suspended along the moving direction of the slider 27, and is movable along the threaded rod 40. By tightening both sides of the pitching cam 39 with the nuts 40a, it can be fixed to any position on the threaded rod 40 at any pitch.

A guide cam 41 is fixed to the side surface of the pitching cam 39, and on the side of the guide cam 41, a roller 37 provided on the ratchet pawl 36 is pushed up from below to release the ratchet pawl 36. A lift pad 42 is provided horizontally.

As shown in FIG. 8, both ends of the lifted paddle 42 are pivotally supported between a pair of bell cranks 43 supported apart from each other in the feed direction, and a turnbuckle 44a is provided between each bell crank 430. They are connected to each other by a rod 44.

A movable part 45a of an electromagnetic solenoid 45 is connected to one end of the operating rod 44, and each bell crank 43 is rotated by the electromagnetic solenoid 45 via the operating rod 44, so that the bell cranks 430 are horizontally spaced. The suspended lift pad 42 is now moved up and down while maintaining its horizontal state.

On the other hand, one end of a wire rope 46 is tied to the forward end of the slider 27 to form an L-loop.

The other end of the wire rope 46 is supported by the support block 24. Extended to the rear, bypassing J47 and 48,
Furthermore, it bypasses the pulley 49 and hangs down below the pedestal 2 (
(see Fig. 9), and a weight 50 is attached in the middle.

Furthermore, the end of the wire rope 46 is tied to one end of a chain 52 after bypassing a pulley 51 attached to the lower part of the pedestal 2.

Note that 53a is a cam that acts on the limit switch 55 to detect the forward end of the slider 27, and 53b is a cam that acts on the limit switch 54 to detect the return end.

The other end of the chain 52 bypasses a sprocket 56 installed on the pedestal 2, extends toward the slider 27, and is connected to the rear end of the slider 27.

The sprocket 56 is fixed to one end of a rotating shaft 58 supported by a bearing 57, and an electromagnetic clutch 59 is provided in the middle of the rotating shaft 58.

This electromagnetic clutch 59 is connected to the limit switch 54.5.
A return motor 62 is interlocked with the pulley 60 via a belt 61, and a return motor 62 is connected to the pulley 60 via a belt 61.・Ru.

(See Figures 9 and 10).

Note that point A indicates the center of a machine tool such as a press into which the sheet material 19 is to be carried.

However, when conveying sheet materials 19 that have been positioned into a machine tool (not shown) at the same pitch, first the sheet materials 19
Adjust the position of the pilot pin 20 of the positioning plate 17 to match the hole 19a opened in the hole 19a, and also adjust the position of each pitching cam 39 to the desired pitch.
Fixed to 0.

Next, the slider 27 is positioned at the starting end (FIGS. 3 and 4 show the state in which the slider 27 has reached the end), and in this state, the sheet material 19 to be conveyed onto the back-and-forth movable table 15. is placed and positioned by the positioning plate 17,
The back-and-forth movable table 15 is moved to the forward end, and one end of the sheet material 19 is clamped between the clamper 33 of the slider 27 waiting at the starting end.

When the clamper 33 clamps the sheet material 19, fluid pressure is supplied to the lift cylinder 9, and the forward/backward movable table 15 is lowered together with the elevating chiffle 3, and the pilot pin 20 is pulled out from the hole 19a of the sheet material 19. The material 19 is attached to each guide member 21, 22, and 2 of the carrying mechanism 14.
3 and is held in a state of being gripped by a gripper 33.

When the elevating table 3 completes its lowering, the limit switch 13 detects this and operates the electromagnetic trenoid 45, so that the lifted paddle 42 is raised.

During this period, the elevating table 3 and the back-and-forth movable table 15, which have completed their descent, retreat and return to their original positions, place the sheet material 19 thereon, and wait for the next loading.

As the lift pad 42 rises, the tip of the ratchet pawl 36 moves upward together with the roller 37 that comes into contact with it against the compression spring 38, and the engaging portion 36a is disengaged from the pitching cam 39, and is pulled by the weight 50 and becomes L. The slider 27 starts moving forward while holding the sheet material 19 while being guided by the guide members 22.
is turned off and the lift pad 42 is lowered, so that the tip of the L ratchet pawl 36 is also moved downward and the next pitching cam 39 engages with the engaging portion 36a, and the slider 27 is stopped at that position. .

That is, the slider 27 moves forward by one pitch, and the sheet material 19
is carried into the machine tool.

At the same time that the first process in the machine tool is completed, the electromagnetic solenoid 45 is turned on again, and the sheet material 19 is advanced by one pitch again by the above operation, and the sheet material 19 is moved according to the preset pitch while repeating the above operation in sequence. Transport it to the machine tool.

When the slider 27 reaches the forward end, the wire rope 46
A cam 53a provided at the cam 53a operates a limit switch 54 that detects the advance end.

As a result, the return motor 62 starts rotating, and the electromagnetic clutch 59, which was disconnected when left in the L position, is also connected, the slider 27 moves backward while being pulled by the chain 52, and the cam 54 engages the limit switch 54. It is stopped at the position where it is turned OFF, that is, the starting end, and waits for the next loading.

While repeating the above operations, the sheet material 19 can be continuously carried into the machine tool according to a preset pitch.

As described in detail above, in this invention, the sheet material, which has been positioned by the forward and backward feeding mechanism, is continuously carried in at a preset pitch by the carrying mechanism, so that even the sheet material whose surface is printed can be This allows the workpiece to be accurately transported to the machine tool that processes it, and there is no risk of misalignment between the printing position and the processing position.At the same time, any loading pitch can be selected by simply changing the position of the pitching cam, so the workpiece does not change. Even in such a case, the delivery pitch can be adjusted efficiently in a short period of time.

In addition, since the positioning of sheet materials and the conveyance at a set pitch can be performed automatically with a relatively simple configuration, productivity is improved and the pitch feeder itself is provided at a lower cost than conventional automated feeders. be able to.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show one embodiment of the present invention, in which FIG. 1 is an overall partially cutaway plan view, FIG. 2 is a front view of the same, and FIG. 3 is a plan view of the feed mechanism. Figure 4 is a partially cutaway side view of the same part, and Figure 5 is a side view of the same part.
Figure 6 is a cross-sectional view taken along the line ■-■ in Figure 4, Figure 7 is a cross-sectional view taken along the line ■-■ in Figure 4, and Figure 8 is a detailed view of the lift drive part. 9 and 10 are detailed views of the slider driving section. 1 is a forward and backward feeding mechanism, 14 is a feed mechanism, 19 is a sheet material, 19a is a hole, 20 is a pilot pin, 21, 22 and 23 are guide members, 25 is a push bolt, 26 is a pull bolt, 27 is a slider, 28 is a A fixed roller, 29 a movable roller, 31 a compression spring, and 33 a gripper.

Claims (1)

[Claims] 1 An elevating table 3 is provided on a lift rack 4 that is moved up and down via a drive rack 7 that is reciprocated by a drive cylinder 9 and a pinion 6.
A back-and-forth movable table 15 is provided so as to be freely movable in the front-back direction.
The longitudinal movement table 15 is provided with a pilot pin 20 that positions the sheet material 19 by fitting into a hole 19a opened in the sheet material 19 to be conveyed, thereby configuring the longitudinal feeding mechanism 1. Guide members 21 , 22 , 23 are provided nearby along the feed direction C orthogonal to the feeding direction of the longitudinal feeding mechanism 1 , and the guide members 21 , 22 , 23 are provided with the guide members 21 , 22 , 23 . Gripper 3 clamps the end of the sheet material 19
3 at the front end is movably mounted, and the slider 27 is equipped with a weight 50 that pulls the slider 27 forward by its own weight, and a return motor 62 that returns the slider 27 to its original position when it reaches the forward end. are connected to each other, and are fixed at intervals to screw rods 40 provided near the slider 27 along the direction of movement of the slider 27,
Pitching cam 3 that locks the slider 27 every pitch
9 and a feed mechanism 14 configured by providing means for releasing the lock of the slider 27.