JPH0372396B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an intermittent rotation mechanism for a rotary table.

Conventional technology Conventionally, as an intermittent rotation mechanism for a rotary table, a pinion gear is meshed with a ring gear provided on the inner circumference of the rotary table via a reducer.
A drive motor is connected to the pinion gear to directly transmit the rotational motion of the drive motor to the pinion gear, and when the drive motor stops intermittently, the pilot pin operated by the drive cylinder is moved upward and fitted into the fitting hole of the rotary table. It is known to assemble a rotary table so that its rotation can be stopped (Utility Model Application No. 158323/1983).

Problems to be Solved by the Invention However, in this intermittent rotation mechanism of the rotary table, since the rotary table is rotated by directly transmitting the rotational motion of the drive motor to the rotary table using a pinion gear, a large torque is required at the start of rotation. , the rotary table must be stopped when the rotational movement is constant and acceleration or inertia is applied to the rotary table, so it is not possible to stop the rotary table immediately in response to the drive stop of the drive motor. The reality is that it is difficult to reliably fit the rotary table into the fitting hole.

In other words, it is an object of the present invention to provide an intermittent rotation mechanism for a rotary table, which is configured to reduce torque during starting and reduce inertia during stopping, so that the rotary table can be stopped at an accurate position.

Means for Solving the Problems In the intermittent rotation mechanism for a rotary table according to the present invention, a cam follower is provided at an eccentric position of a rotating plate rotated by a drive motor, and the cam follower is engaged with a cam groove of an operating plate. An actuating plate is equipped to be able to reciprocate horizontally, a rack bar is provided parallel to the surface of the actuating plate, the rack bar and a pinion are engaged, and a friction clutch is attached to the actuating plate coaxially with the spindle of the pinion. A rotary gear is connected on the same axis through the friction clutch, and the rotary gear is meshed with an annular gear provided on the rotary table. It is constructed by assembling a table that can be rotated intermittently.

Function: In this rotary table intermittent rotation mechanism, the rotational motion of the drive motor is converted and transmitted from the rotary plate as linear motion of the actuating plate that engages with the cam follower and cam groove, and the linear motion is transmitted from the rack bar to the pinion. Since the rotational motion is converted into rotational motion and transmitted to the rotating gear that meshes with the annular gear of the rotary table, the movement speed of the operating plate is fast near the time of starting, which not only reduces the torque at starting, but also causes the rotating plate to rotate half a rotation. The rotary table can be rotated to a predetermined rotation angle by moving the actuating plate in a forward direction via a cam follower installed at an eccentric position of the plate, and since the moving speed of the actuating plate is slow near the time of stop, the rotation speed of the rotary table can also be adjusted. It becomes possible to stop the rotary table at a predetermined position without being affected by the inertia of the rotary table from the point where the friction clutch is disengaged and the rotation of the rotary gear is stopped.

Embodiments The following description will be made with reference to the accompanying drawings.

This rotary table intermittent rotation mechanism is applied to intermittently rotate the rotary table, which has a generally doughnut-shaped plane, at predetermined rotation angles, and as shown in FIG.
A rotary gear 3 which is disposed in mesh with an annular gear 2 formed on the inner peripheral edge of the rotor is rotated by a drive motor 4 shown in FIG. The drive motor 4 is connected to a friction clutch 6 by an endless belt 5, and a reduction gear 7 for increasing rotational torque is connected to the friction clutch 6, and a rotary plate 8 is mounted on the axis of the reduction gear 7 to directly drive the motor. is attached to rotate the rotating plate 8. This rotary plate 8 is equipped with a cam follower 9 supported by a pin at an eccentric position on the plate surface, and by engaging the cam follower 9 with a cam groove 11 in the form of a vertical groove formed on the plate surface of the actuating plate 10, the actuating plate 10 is rotated. 10 are arranged in series. This actuating plate 10 is equipped with a slide guide bar 12, and as shown in FIG. It is supported so that it can move freely. This amount of movement is performed by a stroke corresponding to a desired rotation angle of the rotary table 1, and the setting is such that the actuating plate 10 can be reciprocated with one rotation of the rotary plate 8 over the stroke. This actuating plate 10 is equipped with a rack bar 16 supported in parallel by holding parts 15, 15 on the left and right ends.
is arranged to mesh with the pinion 17. The pinion 17 is mounted on the axis of a support shaft 18 that is vertically supported by the machine base 13, and is connected to the support shaft 18 so that it can be connected on the same axis of the support shaft 18 when the actuating plate 10 moves forward, and is disconnected during the backward movement. An electromagnetic air friction clutch 19 that can be switched freely by a current flowing in accordance with a command from an attached controller such as a rotary cam (not shown).
A rotary gear 3 that meshes with the annular gear 2 of the rotary table 1 via a shaft is mounted on a shaft.

In the intermittent rotation mechanism of the rotary table 1 configured as described above, current is supplied to the solenoid valve of the air friction clutch 6 in response to a command from a controller (not shown) such as a rotary cam attached to the spindle of the rotary plate 8 as described later. , the rotary plate 8 passes through the reducer 7.
One rotation of the rotary table 1 causes the rotary table 1 to rotate by a predetermined angle. That is, when transmitting the driving force of the drive motor 4, which is always rotating at a constant speed, to the rotary table, the friction clutches 6 and 19 are both connected and actuated as shown in FIG. motor 4
The rotational motion of the rotary table 1 can be transmitted to the rotating gear 3 that meshes with the annular gear 2 of the rotary table 1. Further, as the current flows through the electromagnetic valve of the air friction clutch 6, the rotary plate 8 rotates once, but on the way, the cam follower 9 is inserted into the cam groove of the actuating plate 10.
1, the actuating plate 10 is moved leftward with a predetermined stroke by continuously moving half a turn upward at a constant speed from the zero degree position on the right middle side, through the 90° position, to the 180° position on the left middle side. With this movement, the rack bar 16 also moves to the left, and then the pinion 1
7, the friction clutch 19 also rotates clockwise. At that time, the solenoid valve is opened by the electric current, and the friction clutch 19 to which air is supplied is connected to the pinion 17.
By meshing the bearing side of the rotary gear 3 with the mounting side of the rotary gear 3, the rotary gear 3 rotates and drives the rotary table 1 to rotate at a predetermined angle. When the time limit switch of the rotary cam detects this point and the solenoid valve closes to stop the air supply, the friction clutch 19 connects the bearing side of the pinion 17 and the rotary gear 3.
Since the rotary gear 3 disengages from the mounting side and the rotary gear 3 stops rotating accordingly, no driving force is transmitted to the rotary table 1 and the rotary table 1 stops rotating. However, the rotating plate 8 further rotates by half a turn, and as a result, the cam follower 9 moves downward along the cam groove 11 of the actuating plate 10 from the 180° position on the left middle side, through the 270° position, to the 360° position on the right middle side. By continuously making half a rotation at a constant speed, the actuating plate 1
0 moves back to the right, and the rack bar 16 also moves back to its original position. At this point, the limit switch of the rotary cam detects that the spindle of the rotary plate 8 has made one rotation, and the electromagnetic valve of the friction clutch 6 closes to stop the rotation of the rotary plate 8.

If the operation of each mechanism part is represented in a diagram, even if the rotation angle of the spindle of the rotary plate 8 continuously rotates in one rotation as shown in FIG. The state shown in the figure is reached, and since the circumferential speed of the rotary table 1 becomes slower at the start and stop of rotation as shown in FIG. The rotary table 1 can be stopped at a predetermined position without being overloaded and without requiring a strong pressing force to stop the rotary table 1.

This rotary table intermittent rotation mechanism is the 8th
As shown in the figure, a long member W made by integrally extruding synthetic resin on the surface of a metal core material by composite extrusion molding or the like is used as a workpiece, and the ends thereof are subjected to trim processing t ₁ , trim processing t ₂ , cutting processing C, trim Processing t ₃ , piercing processing P
It can be applied to construct a press device that performs the following steps in the order shown in each figure. The press equipment is the 9th
As shown in the figure, a plurality of processing dies 20, 21...25 each having a different blade type are placed on a rotary table 1.
These processing molds 20, 2 are arranged at predetermined intervals.
Processing molds 20 and 2 in which the ends of the elongated member W are arranged in the processing order when 1...25 stops intermittently at a predetermined position.
1...Sequentially insert into 25 from the fixed position and process mold 2
By operating 0, 21...25, the elongated member W
It can be applied to cutting and forming the terminals of Further, the long member W is moved to each processing die 2 by the hand part 31 of the articulated robot 30 that grasps the unprocessed part.
0, 21...25, and is supported so as to be rotatable about the axis of the elongated member W. By bending the joints in response to the sequence, the elongated member W is moved to each processing die 20, 21...
It is preferable to fix it to the base plate 32 so that it can be inserted into and removed from the base plate 25 and rotated. Further, the articulated robot 30 may be equipped with a detector that detects when the elongated member W is gripped by the hand section 31. With respect to the fixed position of the articulated robot 30, each of the processing dies 20, 21, . is equipped to do so. Also, when the rotary table 1 is stopped, the press machine 40
The pressing portion 41 is lowered by the crank 42 and presses each of the processing dies 20, 21, . . . 25, thereby cutting the end of the elongated member W. The press machine 4
0 is installed vertically from the base frame 43 within the circumference of the rotary table 1, so that each processing mold 2 can be
0, 21...25 are arranged so that they can be pressed. This press machine 40 and articulated robot 3
As shown in FIG.
...25 energy transfer parts 20a, 21a...25
Energy supply sections 51 and 52 that supply drive energy such as electricity and air to the drive section a are drawn out. In addition, around the outer circumference of the rotary table 1, an 11th
As shown in the figure, a brake rake 60 such as a cylinder having a brake shoe that stops the rotational movement of the rotary table 1 or an upper or lower brake that operates with a slight delay to the brake 60 fits into the opening of the rotary table 1 and regulates the stopping position. A movable stopper pin (not shown), and a lifting mechanism 7 that lifts and rotates the rotary table 1 as described later.
0. In addition, an operating mechanism section 80 including a switch panel for human use, a phototube for safety confirmation, etc. can be attached.

Floating dies can be used as the processing dies 20, 21...25, which is a pair of left and right dies attached to the plate surface of the rotary table 1 as shown in FIG. 12 to facilitate replacement with other types. It is preferable to position and lock the die base plate 91 with the guide 90 and to fix it with a plurality of rotation stoppers 92. As shown in FIG. 13, this floating die 20 is equipped with a fixed die 94 and a movable die 95 on a die plate 93, of which a long member W is fixed during operation of the processing die, and a movable die that is released after operation. The die 95 is connected with an actuator 96 such as a cylinder that is detachably attached to the die 95 using a one-touch connector so as to move close to the fixed die 94 when the elongated member W is clamped. Further, a plurality of guide posts 97 are installed in the die plate 93, and a punch plate 98 is supported by the guide posts 97 so as to be movable up and down.
A punch 99 is attached to the. this punch 9
9, fixed die 94, and movable die 95 work together to cut a predetermined notch in the elongated member W by pressing from the press machine 40.
It is used for cutting such as punching holes, and the blades of each of the processing dies 20, 21, . . . 25 are formed into irregular shapes depending on the processing. Note that a block 100 for adjusting the vertical stroke movement of the punch 99 can be provided above the punch plate 98. In addition, in this floating die 20, the first
A workpiece terminal position detecting device 101 such as a limit switch or a photoelectric switch is installed on the back side of the dies 94, 95 and the punch 99 with respect to the direction in which the elongated member W enters and exits as shown in FIG. I can do it. Further, as shown in FIG. 15, an annular gear 2 is attached to the inner peripheral edge of the rotary table 1, and a rotating gear 3 meshes with the annular gear 2. A part of the annular gear 2 is formed with a perfect circular arc surface 2a, so that the rotary table It is preferable that the guide plate 102 be placed in sliding contact with the guide plate 102 fixedly installed inside the guide plate 1. Lifting mechanism 1 equipped on this rotary table 1
10, as shown in FIG. 16, support plates 111 are attached to appropriate locations on the base plate 43,
Cylinder part 11 combined with support plate 111
A piston part 114 which is stopped from rotating by a guide pin 113 is arranged between the piston part 114 and a supply nozzle 115 which applies air pressure etc. to the piston part 114, which is connected to the cylinder part 112. It can be equipped by attaching a roller 116 such as a cylindrical radial bearing. In this lifting mechanism, when fluid pressure is applied to the piston part 114 from the supply nozzle 115 during intermittent rotation of the rotary table 1, the piston part 1
14 floats inside the cylinder part 112 and presses the roller 116 against the bottom surface of the rotary table 1, so that the rotary table 1 can be lifted by a slight distance h as shown in FIG. It is possible to rotate with less resistance just by making contact. Also,
The processing molds 20, 21...25 and the position detection tool 1 described above
01 energy receiving parts 20a, 21a...25a
The socket holder 120 is attached to the rotary table 1 as shown in FIG.
20 to form a connecting passage 123 between the electrical socket side contact 121 and the air tube 122. On the other hand, the energy supply path 51 derived from the controller 50,
On the side connected to the air cylinder 52, the air cylinder 54 is fixed with a support bracket 53 attached to an appropriate location on the base frame 43, preferably at a location corresponding to and near the vertically movable pressing section 41 of the press machine 40 as shown in FIG. By connecting a plug holder 55 to the rod end of this cylinder 54, and attaching a plug-side contact 57 biased by a spring 56 and a cylindrical air supply connector 58 made of urethane or the like with good sealing properties to the plug holder 55. Can be equipped. As shown in FIG. 19, these energy receiving portions 20a and energy supply passages 51, 52 are connected to the contacts 121, 57 on the socket side and the plug side, as well as the passages by extending the stroke of the air cylinder 54 when the rotary table 1 stops rotating. By connecting 123 and connector 58, processing die 20,
21...25 can perform predetermined operations, confirm the presence of the end of the elongated member, and fix the processing die.

In the rotary press device configured in this way, the elongated member W is held in a fixed position without being moved, and the elongated member is moved intermittently by the rotation of the rotary table 1 to the processing dies 20, 21...25. It is only necessary to take the terminal side of the long member W in and out and rotate it, and the processing as shown in FIG. 8 can be sequentially applied to the terminal end of the elongated member W in accordance with the insertion and removal. At this time, the long member W can be rotated about its axis and inserted into a predetermined processing die, so the press machine 40
The vertical movement of the pressing portion 41 can be directly utilized, and therefore the structure of the processing mold can be further simplified.

Effects of the Invention As described above, according to the rotary table intermittent rotation mechanism according to the present invention, the rotary table is not subjected to large torque when starting, and is not affected by inertia accompanying rotation of the rotary table when stopped. By being able to smoothly rotate or stop the rotary table, it is possible to perform accurate work.

[Brief explanation of drawings]

1 to 3 are explanatory diagrams showing the intermittent rotation mechanism of the rotary table according to the present invention, and FIG. 4 is an explanatory diagram showing the operational relationship between the rotary plate and the friction clutch of the same mechanism,
Figure 5 is a diagram showing the rotation of the spindle of the rotary plate that is rotated by the drive motor that rotates the rotary table intermittently in the same mechanism, and Figure 6 shows the operation of the mechanism part that is driven by the drive motor of the same mechanism. FIG. 7 is a diagram showing the intermittent rotation of the rotary table of the same mechanism, and FIGS. An explanatory view showing the end shape of the length member in the processing order, FIG. 9 is an overall schematic perspective view showing a press device that can be equipped with an intermittent rotation mechanism for a rotary table according to the present invention, and FIG. 10 is a plan view of the device. Fig. 11 is a plan view showing the mechanical parts installed around the device, Fig. 12 is a plan view of the processing die installed in the device, Fig. 13 is a front view of the processing die, and Fig. 14 is the same processing die. A side view of the mold, FIG. 15 is a partial sectional view showing the inner peripheral side of the rotary table according to the present invention, and FIGS. 16 and 17 are explanatory diagrams showing the configuration and operation of the lifting mechanism that lifts and rotates the rotary table. , FIGS. 18 and 19 are explanatory diagrams showing the configuration and operation of a mechanical section that supplies driving energy for the machining die mounted on the rotary table. 1: Rotary table, 2: Annular gear, 3:
Rotating gear, 4: Drive motor, 8: Rotating plate, 9: Cam follower, 10: Operating plate, 11: Cam groove, 1
6: Rack bar, 17: Pinion, 18: Support shaft,
19: Friction clutch.

Claims (1)

[Claims] 1. A cam follower 9 is provided at an eccentric position of a rotary plate 8 rotated by a drive motor 4, and the cam follower 9 is engaged with a cam groove 11 of an actuating plate 10.
A rack bar 16 is provided parallel to the plate surface of the actuating plate 10, and the rack bar 16 and pinion 17 are meshed with each other, so that a friction force is generated coaxially with the support shaft 18 of the pinion 17. A clutch 19 is attached so that it can be connected when the operating plate 10 moves forward and disconnected when it moves backward, and the friction clutch 1
A rotary gear 3 is further provided on the same axis via a rotary table 1, and the rotary gear 3 is meshed with an annular gear 2 provided on the rotary table 1, so that the rotary table 1 can be assembled to be able to rotate intermittently. An intermittent rotation mechanism for a rotary table.