JPS6010757Y2 - Pitch feeder slider advancement device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a slider stepping device in a pitch feeder for carrying a sheet material to be processed by a machine tool such as a press into the machine tool at a preset pitch.

The object of this invention is to provide a latch pawl that engages with a pitching cam set in advance at a desired pitch at the bottom of a slider that is movable along a guide member, and to By repeating the locking and releasing of the cam, we provide a pitch feeder slider stepping device that can step the slider sequentially at a preset pitch, allowing the sheet material to be stably delivered to the machine tool with an accurate pinch. The aim is to make it possible to supply.

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

In the figure, reference numeral 1 denotes a back-and-forth moving mechanism, and a lift table 3 is installed on the top of a pedestal 2.

A plurality of lift latches 4 are provided at the lower part of the lifting table 3, and a drive shaft 5 is supported near these lift latches 4 in a direction perpendicular to these lift latches 4.

The drive shaft 5 has a pinion 6 that meshes with the lift latch 4.
and a pinion 8 that meshes with a drive rack 7 provided horizontally, and these racks 4, 7.
The drive rack 7 is connected to the tip of a piston rod 9a of a lift cylinder 9.

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 is housed inside.

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 lifting table 3 is raised by the action of the compression spring 11.

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 lift table 3.

Both sides of the longitudinally movable table 15 protrude outward from both side edges of the elevating table 3, and the elevating table 3 is disposed on the lower surface thereof.
Rollers 16 guided on both side edges of the table are rotatably supported, and these rollers 16 enable the back and forth table 15 to smoothly move back and forth in the directions of arrows a and b with respect to the lifting table 3. Positioning plates 17 are provided on the rear upper surface of the back-and-forth movable table 15 and spaced apart 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 is provided in a protruding manner to fit into a hole 19a opened in the sheet material 19 to be used.

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 back-and-forth movable table 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.
22 and 23.

Guide member 21 among these guide members 21 to 23
and 23 are attached to a support block 24 installed on the pedestal 2 so as to be located outside and parallel to each other, and the remaining guide members 22 are attached so as to be movable along the inside of the guide member 21.

On the outside of the guide member 21, push bolts 2 are arranged alternately in the longitudinal direction.
5 and a pull bolt 26 are screwed together, and by adjusting these push bolts 25 and pull bolts 26, the straightness of the guide member 22 can be adjusted. A slider 27 is housed between 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. It is freely supported.

The shaft rod 30 that supports the movable guide roller 29 is somewhat movable in the direction toward and away from the guide member 23, and the movable guide roller 29 is moved toward the guide member 23 by a compression spring 31 that biases the shaft rod 30. A guide roller 32 is supported at the bottom of the slider 27, which is in pressure contact with the guide roller 32 and supports a load in the radial direction.

As a result, the slider 27 moves along the guide rollers 22 and 23 in the feed direction (
It is designed to be able to reciprocate in the direction of arrow C).

A lower jaw 33a of the gripper 33 is fixed to the upper front end of the slider 27.

An upper jaw 33b is rotatably provided above the lower jaw 33a, and a gripper cylinder 3 mounted on the slider 27 is attached to the base end of the upper jaw 33b.
The tip of the piston rod 34a of No. 4 is pivotally attached, and by moving the tip of the upper jaw 33b downward with this gripper cylinder 34, the upper jaw 33b and the lower jaw 33 are moved.
It is possible to grip one end of the sheet material 19 to be transferred between the sections a.

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 3B, and is provided below the slider 27. The pitching cam 39 is detachably engaged with the pitching cam 39.

The pitching cam 39 is inserted through a screw rod 40 horizontally suspended along the moving direction of the slider 27, and is movable along the screw rod 40. By tightening both sides of the pitching cam 39, 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 a lift pad 42 is attached to the side of the guide cam 41 for pushing up a roller 37 provided on the ratchet pawl 36 from below to open the ratchet pawl 36. is placed 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 between each bell crank 43 is an operating rod having a turnbuckle 44a in the middle. They are interconnected by 44.

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

On the other hand, one end of a wire rope 46 is tied to the forward end of the slider 27.

The other end of the wire rope 46 bypasses the boots 1J47 and 48 supported by the support block 24 and extends rearward.
Furthermore, it bypasses the pulley 49 and hangs down below the pedestal 2 (
(see FIG. 9), 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.
5 is turned ON and OFF to connect and disconnect between the rotary shaft 58 and a pulley 60 rotatably supported by the rotary shaft 58. A return motor 62 is interlocked with the pulley 60 via a belt 61. (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.

When carrying the positioned sheet material 19 into a machine tool (not shown) at the same pitch, first adjust the position of the pilot pin 20 of the positioning plate 17 to match the hole 19a opened in the sheet material 19, and then adjust the position of the pilot pin 20 to the desired pitch. Adjust the position of each pitching cam 39 and tighten the screw rod 40 at that position.
Fixed to.

Next, position the slider 27 at the starting end (Figs. 3 and 4 show the slider 27 reaching the end).
In this state, the sheet material 19 to be conveyed is placed on the back-and-forth moving table 15 and positioned by the positioning plate 17, and the back-and-forth moving table 15 is moved to the forward end, and the gripper 33 of the slider 27 waiting at the starting end is , sheet material 1
Clamp one end of 9.

When the gripper 33 grips the sheet material 19, fluid pressure is supplied to the lift cylinder 9, and the back-and-forth movable table 15 descends together with the elevating table 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 lifting table 3 completes its lowering, the limit switch 13 detects this, operates the electromagnetic solenoid 45, and lifts the lifted paddle 42.

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 in contact with it against the compression spring 38, and the engaging portion 36a disengages from the pitching cam 39, causing the slider to be pulled by the weight 50. 27 starts moving forward while being guided by the guide members 22 and 23 while holding the sheet material 19, and at the same time as the ratchet pawl 36 comes off from the pitching cam 39, the electromagnetic solenoid 45
is turned off and the lift pad 42 is lowered, so that the tip of the 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 l pitch, and the sheet material 19
is carried into the machine tool.

Simultaneously with the completion of the first process in the machine tool, the electromagnetic solenoid 45 is turned on again and the sheet material 19 is advanced 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, a cam 53a provided on the wire rope 46 operates a limit switch 55 that detects the forward end.

As a result, the return motor 62 starts rotating, and the electromagnetic clutch 59, which had been disconnected until now, is also connected, the slider 27 moves backward while being pulled by the chain 52, and the cam 53b acts on the limit switch 54, causing the slider 27 to move backward while being pulled by the chain 52. It is stopped at the position where it is turned off, that is, at 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, this invention allows the slider holding the sheet material to be sequentially conveyed to the machine tool according to this pitch by adjusting multiple pitching cams to a desired pitch in advance, and especially for printing. This enables highly accurate and stable machining when continuously machining sheet materials, and the feed pitch can be changed freely by simply loosening the nut that secures the pitching cam to the threaded rod. Even if the feed pitch changes depending on the sheet material, the feed pitch can be changed in a short time, resulting in very high work efficiency.

Further, since a power source for moving the slider forward is not required, the structure is simpler and energy saving can be achieved compared to a slider that is moved forward by power.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, in which Fig. 1 is an overall partially cutaway plan view, Fig. 2 is a front view of the same, Fig. 3 is a plan view of the feed mechanism, and Fig. 4 is a partially cutaway side view of the same. Figure 5 is the 4th
Figure 6 is a sectional view taken along the line Vl-VI in Figure 4, Figure 7 is a 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. 19 is a sheet material, 21, 22 and 23 are guide members, 2
7 is a slider, 33 is a gripper, 36 is a ratchet pawl,
37 is a roller, 39 is a pitching cam, 40 is a screw rod,
40a is a double nut, 42 is a lifted paddle, 43 is a bell crank, 44 is an operating rod, and 45 is an electromagnetic solenoid.

Claims (1)

[Scope of utility model registration request] The slider 27 has a gripper 33 for holding the sheet material 19 to be carried into the machine tool, and is guided by the guide members 21, 22, and 23 so as to move forward and backward toward the machine tool. A ratchet pawl that removably engages with a plurality of pitching cams 39 that are provided on the threaded rod 40 and can be fixed to any position on the threaded rod 40 by a nut 40a screwed into the threaded rod 40. 36
The ratchet pawl 36 is provided with an electromagnetic solenoid 4.
The slider stepping device for a pitch feeder is configured such that the slider 27 is freely rotatable in the direction of engagement and disengagement of the pitching cam 39 by a lifted paddle 42 which is moved up and down by a weight 50, and the slider 27 is pulled in the forward direction by a weight 50.