JPH0110295Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an intermittent feeding device.

The purpose of this invention is to accurately stop the conveyance stop position of the cart by reliably stopping the driven shaft, which rotates intermittently, at that position after it has rotated by a certain rotation angle. It is an object of the present invention to provide an intermittent feeding device having a robust structure in which the accuracy of intermittent rotation is good and the actuating member returns to its original position with a single action.

In the conventional intermittent feed device, when indexing and feeding the cart using a passive shaft that rotates intermittently, a hydraulic cylinder or the like is used to stop the drive unit dedicated to feeding and the stop mechanism for positioning the cart. The stop mechanism was operated by raising and lowering the piece using a small diameter cylinder. Therefore, it involved two actions.
According to the above-mentioned feeding device, a stopper groove for the stop mechanism is also required on the cart side, and if the indexing feed pitch is narrow, the stopper mechanism's stopper piece does not enter the stopper groove and malfunctions, such as idling. The situation was ripe.

Therefore, in this invention, by providing an intermittent feed device that can simultaneously operate the rotational feed and rotational angle positioning of the passive shaft, the structure ensures constant rotational angle indexing, and the above-mentioned stop mechanism can be stopped. This made it possible to eliminate the stopper groove on the truck side.

Hereinafter, an embodiment in which this invention is used for intermittent feeding of a cart will be described in detail with reference to FIGS. 1 to 3.

1 shown in FIG. 1 has five stepped pins 2, 2...
These are two discs with ... planted on them. The disc 1, 1
Collars 3, 3, . . . of a predetermined diameter are fitted between the pins 2, 2, .

The disks 1, 1 are fixed to one end of the horizontal passive shaft 4 shown in FIG. 2 via a small disk 19 for position correction, which will be described later. The passive shaft 4 is supported by bearings 5, 5 on the upper stage of the stepped frame 30.

On the other hand, the passive shaft 4 is located vertically below the disc 1.
A direct-acting cylinder 9 is fixed horizontally to the lower part of the pedestal 30 in a direction perpendicular to the figure. Directly below the disks 1, 1, guide groove members 6', 6' are fixed to the upper surface of the lower stage of this pedestal 30, in which guide grooves 6 are formed in advance with U-shaped cross sections facing each other. A sliding body 7 having wheels 8, 8 is fitted into and slides within the guide groove 6. A connecting terminal 10 at the piston rod end of the cylinder 9 is connected to the rear end of the sliding body 7 by a support shaft 11. Then, the sliding body 7 moves the guide groove 6 into the disk 1.
The stroke length of the cylinder 9 is selected so that the cylinder 9 slides with a stroke greater than the distance between the adjacent collars 3, 3.

As clearly shown in FIG.
It is pivoted at. The upright claw end of the locking claw 12 has a height to engage with the collar 3 located on the underside of the disc 1. Further, the triangular pawl 14 is connected to L-shaped support plates 15 and 1 attached to the front ends of the guide groove members 6' and 6'.
5, and is pivotally connected by a support shaft 16. The triangular claw 1
4 is always urged to rotate clockwise by a spring 18, as shown in FIGS. 1 and 3, in order to prevent it from falling backward. Furthermore, the triangular claw 14
is a tip 17 of the sliding body 7, and has a height such that it engages with one of the collars 3 located on the lower side of the disc 1 when the bottom surface of the triangular pawl 14 is pushed up. So,
It has a relative position facing the aforementioned locking pawl 12 and a height.

On the other hand, the small disk 19 for indexing position correction is made by driving the key 20 into the outside of the disk 1 and
It is fastened to. Two holes are provided at separate positions on the small diameter circumference of the small disk 19. Further, in the disk 1 located outside the disks 1, 1, six holes of the same diameter are provided at positions divided into six equal parts on the circumference of the same diameter. Any of these six holes is connected to a hole in the small disk 19 by a connecting pin 21.

As a result, the intermittent rotational force applied to the disc 1 is transmitted to the driven shaft 4 through the connecting pin 21, the small disc 19 for indexing position correction, and the key 20.

Next, in FIG. 2, in order to move the cart 28 backward due to the reversal of the disc 1, a drive source 22 is provided below the pedestal 30, and a chain wheel 23 is provided on the side of the driven shaft 4, and a chain is installed at the location. 24 is strung up.

Further, in order to connect the truck 28 and the driven shaft 4, an endless chain 26 is stretched between the chain wheel 25 fixed to the center of the driven shaft 4 and the front and rear ends of the truck 28. As a result, the trolley 28
It can move continuously within the track 27 on the pedestal 30.

Since this invention is constructed as described above, the operation of the intermittent feeding device is such that when the sliding body 7 at the piston rod end of the lower cylinder 9 of the pedestal 30 is advanced, the locking pawl 12 of the sliding body 7 moves forward. The claw end engages and presses one of the collars 3 on the lower side of the disk 1 described above, and the disk 1 is rotated one-fifth of a turn. At the same time, the protruding end 17 of the sliding body 7 pushes up the bottom surface of the triangular claw 14 and makes the claw end of the triangular claw 14 stand upright. The rotation of the disk 1 is restricted and the position is determined.

The movement locus of the opposing claw ends of both of the locking claws 12 and the triangular claw 14 is such that when the piston rod of the cylinder 9 moves forward, the disc 1 rotates at a certain rotation angle and then stops. It is adjusted to operate parallel to the tangent at the lower position on the circumference of the collar 3.

Conversely, when the sliding body 7 at the piston rod end of the cylinder 9 retreats, the triangular pawl 14 from which the tip 17 has come off returns to its forward tilt due to the elastic force of the spring 18, and the locking pawl 12 also moves back to the sliding body 7. retreat with
On the way, the upright claw end of the locking claw 12 comes into contact with one of the collars 3 on the lower side of the disc 1,
It temporarily goes into a prone position, but returns immediately. Therefore, there is nothing blocking the rotation of the disk 1 mentioned above,
The disc 1 and the driven shaft 4 are rotatable.

In this way, as the cylinder 9 repeats forward and backward movement, the disk 1 and the passive shaft 4 repeatedly roll by one-fifth of a rotation and then stop.

The disc 1 of this invention and the small disc 19 for indexing position correction are connected by a connecting pin 21 and the passive shaft 4.
The small disc 19 and the chain wheel 23 are connected to the key 20.
Since the central chain wheel 25 and the carriage 28 are connected by an endless chain 26, the carriage 28 moves forward by a fixed interval each time the piston rod of the cylinder 9 reciprocates. This will result in repeated stops. However, cylinder 9
While the piston rod is held in the most advanced state, one of the collars 3 of the disc 1 is held between the locking pawl 12 and the triangular pawl 14, so that the carriage 28 is It does not move in the direction of.

When it is desired to move back the truck 28 that has advanced intermittently to near the end of the track 27, the cylinder 9
After retracting the piston rod and confirming its return, if the drive source 22 below the pedestal 30 is rotated,
The truck 28 in the forward position moves backward by that amount.

In addition, when it is desired to correct the stopping position of the trolley 28 which advances intermittently and stops by using the intermittent feeding device of this invention, or when it is stopped due to elongation of the endless chain 26 connecting the trolley 28 and the chain wheel 25, etc. Correction of positional errors is performed using the small disk 19.
Then, by removing the connecting pin 21 with the disc 1, changing the relative positions of the disc 1 and the small disc 19, rearranging them to five other holes, and reconnecting them, the stopping position of the trolley 28 can be determined. can be corrected, and the stop position of intermittent feed can be freely selected.

The effect brought about by the intermittent feeding device of this invention is that due to the guide groove member forming the guide groove and the support plate, there is no misalignment of the opposing ends of both the locking pawl and the triangular pawl, resulting in precision. Good feed dimensions can be obtained. Even if there is play in each support shaft between the sliding body and another object due to movement over many years, the tip of the sliding body that fits into the guide groove and slides, the position of the support shaft of the triangular claw, and its bottom surface. Due to the combination of the above, the rotation of the disc itself has a structure that does not produce errors, can always be stopped with high precision, and the structure of the feeding device is simple and robust. .

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a side view of the intermittent feeder, FIG. 2 is a front view of the intermittent feeder, and FIG. 3 is an exploded perspective view of the components of the intermittent feeder. 1...disk, 2...stepped pin, 3...color,
4... Passive shaft, 6... Guide groove, 6'... Guide groove member, 7... Sliding body, 9... Cylinder, 12... Locking claw, 14... Triangular claw, 30... Frame.

Claims (1)

[Scope of utility model registration request] A passive shaft is supported by a bearing on the upper stage of the mount, and a disc on which a plurality of pins are planted at equal intervals on the same circumference is fixed to one end of the passive shaft, and a disc on the lower stage of the mount is fixed to one end of the passive shaft. A guide groove member having a U-shaped cross section facing in a direction perpendicular to the driven shaft is fixed vertically downward, and the guide groove member is brought into contact with a pin implanted in the disc in an upright state at one end of the guide groove member. A triangular pawl is rotatably supported, and a sliding body connected to a piston rod of a cylinder arranged in the longitudinal direction of the guide groove member is fitted and slid into the guide groove member. An intermittent feeding device characterized in that a locking pawl is pivotally supported, which presses a pin installed in the disc and rotates the disc by one stroke when the moving body moves forward.