JPH0366050B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a feed bar drive device for intermittently transporting a workpiece in a transfer press, and more specifically to a feed bar drive device for intermittently conveying a workpiece in a transfer press.
This invention relates to a drive device that allows stepless adjustment of the feed stroke in the return direction.

(Prior art) As a conventional example of an intermittent conveyance drive device for workpieces in a transfer press, for example, the
Like the invention described in Publication No. 13434, a drive pin engaged with a slider is rotated following an oval trajectory, or
There is an invention in which the slider drive pin is simply rotated, such as the invention described in Publication No. 51-116472.

In the former prior art, in which the drive pin is moved along an elliptical trajectory, there are problems in that it is difficult to change the stroke of the advance/return motion of the feed bar; In the latter case where the drive pin is rotated, the stroke of the advice/return movement can be changed by changing the position of the slider and the drive pin, but in either case, the movement of the drive pin Since the locus becomes complicated, there is a problem that the coupling structure between the drive pin and the slider becomes complicated.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to provide an intermittent transport drive device for workpieces that can steplessly adjust the feed stroke of the advance/return movement of the feed bar in the transfer feeder. be.

(Means for solving the problem) Means for solving the problem in the present invention are as follows:
A main gear that is interlocked with a drive gear that rotates in synchronization with the transfer press and is driven to rotate by changing the rotational speed intermittently, and is slidably connected to an eccentric pin provided at an eccentric position of the main gear to reciprocate in the horizontal direction. A moving arm-driving slider, a rack provided at a side end along the moving direction of the arm-driving slider, an arm along the horizontal direction provided integrally with a pinion that meshes with the rack, and a longitudinal side of the arm attached to the arm. A drive pin is screwed to an adjuster screw supported in the direction, a midpoint adjustment slider is slidably connected to the drive pin, and the midpoint adjustment slider is connected so that its mounting position can be adjusted and is horizontal. The feed bar driving slider is provided with a feed bar driving slider that moves back and forth in the direction, and the feed bar driving slider is provided with a feed bar that can freely move in the clamp/unclamp direction but moves together with the feed bar driving slider in the advance/return direction. It is characterized by this.

(Function) The main gear 4 is intermittently rotated by the drive gear 3 that rotates at a constant speed in synchronization with the transfer press, and the arm driving slider 8 is reciprocated by the main gear 4 to swing the arm 14. At the same time, the feed bar driving slider 22 is reciprocated in the advance/return direction via the midpoint adjustment slider 25 by the drive pin 27 that swings together with the arm 14 . In addition, by rotating the adjusting screw 15 by the stroke adjusting motor 16 and changing the revolution radius of the drive pin 27, the feed stroke of the advance/return movement of the feed bar driving slider 22 can be changed steplessly. I'm trying to make it possible.

(Example) Fig. 1 is a vertical cross-sectional view of the entire assembly, Fig. 2 is a partially cutaway plan view, and Fig. 3 is the − of Fig. 1.
FIG.

In these figures, a drive gear 3 is attached to the lower end of a drive shaft 2 that is supported by a frame 1 and runs vertically.
This drive gear 3 interlocks a main gear 4 which is pivotally supported by the frame 1 via an intermittent rotation mechanism 5. The drive shaft 2 is rotated at a constant speed in synchronization with a transfer press (not shown).

The intermittent rotation mechanism 5 includes a first gear 5a that meshes with the drive gear 2, and a first gear 5a that meshes with the drive gear 2.
a second gear 5b that is supported eccentrically relative to the main gear 4 and held in mesh with the main gear 4;
A pin 5c provided at an eccentric position of the first gear 5a
and a radial groove 5d formed in the second gear 5b, and the pin 5c is slidably engaged with the groove 5d. When the first gear 5a is rotated at a constant speed and in the same direction by the drive gear 3, the second gear 5b intermittently reduces the rotation speed in a predetermined rotation range. The main gear 4 rotates at different speeds, and accordingly, the rotational speed is reduced only twice during each rotation of the main gear 4.

A pair of parallel guide bars 7, 7 are provided above the main gear 4 and extend along the advance/return direction of a pair of parallel feed bars 6, 6.
An arm driving slider 8 is slidably mounted on the arm. An eccentric pin 9 is provided at an eccentric position of the main gear 4, and a groove 10 in a direction perpendicular to the guide rods 7, 7 is formed on the lower surface of the arm driving slider 8, and the eccentric pin 9 is provided in the groove 10. When the eccentric pin 9 moves as the main gear 4 rotates by slidably engaging the
An arm driving slider 8 is configured to reciprocate along guide rods 7, 7.

A rack 11 parallel to the guide rods 7, 7 is provided at the side end of the arm driving slider 8, and the rack 11 is rotatably provided on the frame 1 and formed into a cylindrical body 12 extending in the vertical direction. pinion 1
3 is engaged with the rack 11.

Further, the base of an arm 14 along the horizontal direction is fixed to the upper part of the cylinder 12, and the arm 14 is fixed to the upper part of the cylinder 12.
Adjustment screw 15 parallel to the longitudinal direction
is pivoted. The lower end of the drive shaft 17, which is pivotally supported at the center of the cylinder 12, is coupled to the output shaft 18 of the motor 16 for stroke adjustment via a coupling 19, and the upper end of the drive shaft 17 is connected to the output shaft 18 of the motor 16 for stroke adjustment. By interlocking the adjusting screw 15 with the adjusting screw 15 via a bevel gear 20, the motor 16 is rotationally driven to rotate the adjusting screw 15.

In addition, 21 is the above-mentioned Asia Store Auction 15
This is an engaging part for attaching a handle to manually rotate the handle.

The feed bar driving slider 22 to which the feed bars 6, 6 are mounted is slidably held by guide rods 23, 23 along the advance and return directions of the feed bar, and the lower surface of the feed bar driving slider 22 has the corresponding A midpoint adjustment slider 25 is slidably mounted via guide shafts 24, 24 in the direction of movement of the slider, that is, in a direction parallel to the guide rods 23, 23, and further in a direction perpendicular to the guide shafts 24, 24. Horizontal groove 2 provided
6 is formed on the lower surface of the midpoint adjustment slider 25.

On the other hand, a drive pin 27 is screwed to an adjuster screw 15 provided on the arm 14.
When the adjusting screw 15 is rotated and the drive pin 27 is moved along the arm 14 by slidably engaging the upper end with the horizontal groove 26, the arm 14 and the midpoint adjustment slider 25 are moved.
The engagement position of the cylinder body 12 can be changed with respect to the center of rotation of the cylinder body 12.

In addition, the pin 5c of the first gear 5a in the intermittent rotation mechanism 5, the pin 9 of the main gear 4, and the drive pin 2 of the adjusting screw 15
Slide metals 28, 29, and 30 are respectively interposed in the grooves 7 to reduce sliding resistance within the grooves.

Referring to FIG. 2, the middle point adjustment slider 25
A hydraulic cylinder 31 is interposed between the guide shafts 24 and the guide shafts 24, and by controlling the pressure oil supplied to the hydraulic cylinder 31 from an oil passage 32 formed in the guide shaft 24, a hydraulic cylinder 31 is provided for driving the feed bar. Slider 2 for midpoint adjustment with respect to slider 22
5 can be moved in the advance/return direction of the feed bars 6, 6.

In the embodiment configured as described above, when the drive gear 3 rotates in synchronization with a transfer press (not shown), the intermittent rotation mechanism 5
The first gear 5a rotates, causing the second gear 5b meshed with the main gear 4 to rotate at an inconstant speed.

When the main gear 4 rotates, this main gear 4
arm drive slider 8 via pin 9 provided in
moves back and forth along the guide rods 7, 7. At this time, assuming that the main gear 4 is rotating at a constant speed, the arm driving slider 8 reciprocates based on a sine curve, but the main gear 4 is driven via the intermittent rotation mechanism 5. Moreover, the phases of the pins 5c and 9 are set so that when the arm drive slider 8 is located at the end of its movement, the pin 5c is located at the outer end of the groove 5d formed in the second gear 5b. Therefore, the arm driving slider 8 reciprocates while temporarily stopping at the end of its movement.

When the arm driving slider 8 reciprocates in this manner, the pinion 13 is rotated by the rack 11 that reciprocates together with the arm driving slider 8, and the cylindrical body 12 is rotationally driven accordingly.
Furthermore, an arm 14 fixed to the cylinder body 12 is attached to the cylinder body 12.
It also rotates in the forward and reverse directions. Then, the drive pin 27 screwed to the adjusting screw 15 provided on this arm 14 is connected to the arm 1.
Since the slider 25 for adjusting the midpoint revolves around the swing center of the slider 2 for driving the feed bar,
2 along with the guide rods 23, 23, thereby causing the feed bars 6, 6 to perform advance and return movements.

On the other hand, when the motor 16 for stroke adjustment is rotated, the adjustment screw 15 is rotated via the drive shaft 17, and the drive pin 27 screwed to the adjustment screw 15 is rotated.
moves in the length direction of arm 14. Then, the revolution radius of the drive pin 27 engaged with the structure 26 of the midpoint adjustment slider 25 changes, so even if the arm 14 swings by the same angle, the midpoint adjustment slider 25 and the feed bar drive slider 22 changes, and accordingly the feed stroke amount of the feed bars 6, 6 changes.

(Effects of the Invention) The present invention allows an arm to be reciprocated by an arm driving slider that is reciprocated by a main gear that rotates in conjunction with a drive gear that rotates in synchronization with a transfer press. Since the attached drive pin is moved in the length direction of the arm using an adjuster screw pivotally supported on the arm to change its revolution radius, the feed stroke of the feed bar can be adjusted steplessly. There is an effect of what can be done.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of the entire assembly, Figure 2 is a partially cutaway plan view, and Figure 3 is the same figure as shown in Figure 1.
FIG. DESCRIPTION OF SYMBOLS 1... Frame, 2... Drive shaft, 3... Drive gear, 4... Main gear, 5... Intermittent rotation mechanism, 6... Feed bar, 7... Guide rod, 8...
...Arm drive slider, 9...Eccentric pin, 10
...Groove, 11...Rack, 12...Cylinder, 13...
... Pinion, 14 ... Arm, 15 ... Adjustment screw, 16 ... Motor, 17 ... Drive shaft, 18 ... Output shaft, 22 ... Feed bar driving slider, 23 ... Guide rod, 24 ...
...Guide shaft, 25...Midpoint adjustment slider, 26
...Horizontal groove, 27...Drive pin.

Claims (1)

[Claims] 1. A main gear that is interlocked with a drive gear that rotates in synchronization with the transfer press and is driven to rotate by changing the rotational speed intermittently, and is slidably coupled to an eccentric pin provided at an eccentric position of the main gear so as to rotate horizontally. An arm drive slider that moves back and forth, a rack provided at the side end of the arm drive slider along the direction of movement, an arm along the horizontal direction that is integrally provided with a pinion that meshes with the rack, and an arm drive slider that moves back and forth; A drive pin screwed to an adjuster screw pivotally supported in the longitudinal direction, a midpoint adjustment slider slidably connected to the drive pin, and the midpoint adjustment slider connected so that its mounting position can be adjusted. and a feed bar driving slider that reciprocates in the horizontal direction, and the feed bar driving slider is provided with a feed bar that can freely move in the clamp/unclamp direction but moves together with the feed bar driving slider in the advance/return direction. A transfer press intermittent conveyance drive device for workpieces, which is characterized by: