JPH0442101B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a conveying device for processed products in a transfer press, and more particularly to a device for advancing and returning the feed bar of a transfer feeder. .

(Prior Art) Various types of conveyance devices have been developed for conveying processed products to a plurality of molds in a transfer press.

A conventional workpiece conveyance device has a pair of feed bars arranged along the parallel direction of the molds, and causes the feed bars to perform advance/return motion and clamp/unclamp motion. The processed products are held and conveyed to each mold by fingers provided in accordance with the number of molds installed. Further, if necessary, a lift/down motion is applied to the feed bar while the advance/return motion is stopped.

A conventional example of a transfer press for conveying a workpiece is, for example, the invention described in Japanese Patent Publication No. 13434/1983, in which a drive pin engaged with a slider is rotated along an elliptical trajectory. or those designed to cause
An invention in which the slider drive pin is simply rotated is known, such as the invention described in Japanese Patent No. 22170.

In the invention described in the former part of the prior art, in which the drive pin is moved along an elliptical locus, there is a problem that the stroke of the advance/return movement of the feed bar cannot be changed. In addition, in the invention described in the latter, in which the drive pin is rotated, the stroke of the advance/return movement can be changed by changing the position of the slider drive pin. In this case as well, the movement locus of the drive pin becomes complicated, so there is a problem that the coupling structure between the drive pin and the slider becomes complicated.

Furthermore, Japanese Patent Publication No. 55-22170, which is the latter of the prior art, states that at the advance end of the feed bar, a minute displacement (so-called backlash in the longitudinal direction) occurs in which the feed bar moves slightly in the advance direction and returns. It is stated that.
The main components of this device include a sun gear, a planetary gear that meshes with the sun gear, and an eccentric pin that is placed eccentrically with respect to the planetary gear that fits into a radial groove in a disc that is coaxial with the sun gear. In the above configuration, the stopping angle and the amount of minute displacement of the feed bar are determined by selecting the ratio of the basic circle diameters of the sun gear and the planetary gear and the eccentric distance of the eccentric pin to the planetary gear.

In order to minimize the amount of rattling of the feed bar at the advance end relative to the feed stroke, the base circle diameters of the sun gear and planetary gear and the ratio of the eccentric distance of the eccentric pin to the planetary gear are set to a certain ratio. As a result, the amount of displacement becomes a negligible value, but this results in a problem in that the stop angle of the feed bar decreases and the time for clamping and unclamping movements decreases.

(Problems to be Solved by the Invention) The problems to be solved by the present invention are to be able to arbitrarily select the stop angle at the stroke end of the feed bar, and to reduce the amount of minute displacement at the stroke end of advance return motion to the extent that it can be ignored. It is an object of the present invention to provide a conveyance device for processed products that can be carried out.

(Means for solving the problem) Means for solving the problem in the present invention are as follows:
A main gear that is rotationally driven in synchronization with the drive section of the press, a sun gear that is provided concentrically with the main gear, a planetary gear that meshes with the sun gear and is pivotally supported by the main gear, and a planetary gear that is provided at an eccentric position of the planetary gear. an eccentric pin, a first slider that engages with the eccentric pin and moves reciprocally along the conveyance direction of the pressed product, and an arm that engages with and coaxially engages with racks provided on both sides of the first slider. a pinion that is pivotally supported on the frame; a second slider that engages with the follower provided on each arm and moves back and forth along the conveyance direction of the pressed product; and movement of the second slider to the second slider; It consists of a feed bar holder that is slidable only in a direction perpendicular to the direction of the feed bar, and a feed bar attached to the feed bar holder, and when the press is operated, the main gear is rotated in forward and reverse directions to cause the feed bar to move in advance and return. It is characterized by this.

(Operation) When the drive gear 12 rotates in synchronization with the drive section of the press, the main gear 15 rotates in conjunction with the drive gear 12, thereby causing the planetary gear 22 to revolve around the sun gear 21 while rotating. At the same time, the follower 24 of the eccentric pin 23 reciprocates the first slider 26 along the guide rod 25 in parallel to the conveyance direction of the workpiece.
The rack 28 of No. 6 rotates the pinion 29 in forward and reverse directions.

Further, the follower 32 of the arm 31 provided on the pinion shaft 30 of the pinion 29 is connected to the second slider 3.
4, the rotation of the pinion 29 causes the second slider 34 to reciprocate along the guide rod 33, thereby causing the feed bar 37 to perform an advance return motion.

(Example) Fig. 1 is a vertical cross-sectional view of the entire conveyance device assembled, Fig. 2 is a plan view of the same, Fig. 3 is a sectional view taken along line 3-3 in Fig. FIG. 2 is a schematic diagram showing a state in which the device is installed.

First, in Fig. 4, transfer press 1
00 places bed 101 and crank 102 in column 1
04, and a press slide 103 is moved up and down by a crankshaft 105. In addition, the bed 101 has a bolster 106.
is provided, and the lower mold is mounted on the bolster 106.
The press slide 103 is provided with an upper mold, and a plurality of these molds are arranged in parallel to constitute a transfer press.

The press workpiece is sequentially conveyed to each mold by a pair of feed bars 37 provided along the mold. The device for advancing the feed bar, which is the subject of the present invention, is shown in column 1.
A main body frame 10 provided adjacent to a bolster 106 within the main body frame 10 and a drive shaft 11 that drives each device within the main body frame 10 are connected to a crankshaft 105, and this device is synchronized with the drive section of the press. be driven.

Next, in FIGS. 1 to 3, a drive gear 12 is provided at the lower end of a vertically extending drive shaft 11 that is pivotally supported on the main body frame 10. Another idle gear 14 provided coaxially with the idle gear 13 is connected to the main body frame 1.
It is meshed with the main gear 15 which is pivotally supported by the main gear 15.

The main gear 15 is formed with a roof portion 15a that covers a bearing member 16 provided on the main body frame 10, and a vertical shaft 17 provided at the center of the gear is loosely inserted into the bearing member 16 in the roof portion 15a. A bevel gear 18 provided at the lower end of the vertical shaft 17 meshes with a bevel gear 20 of a rotating shaft 19 mounted on the main body frame 10. Therefore, by rotating the rotating shaft 19 using a separate mechanism, the main gear 15 can be rotated separately from the press drive section.

On the other hand, the bearing member 16 is provided with a sun gear 21, and the main gear 15 is provided with a vertical shaft 17.
A planetary gear 22 is provided at a position offset from the center of the sun gear 21, and this planetary gear 22 meshes with the sun gear 21. Furthermore, the shaft portion of the planetary gear 22 is exposed on the upper surface of the roof portion 15a of the main gear 15, and an eccentric pin 23 is provided in this portion at a position offset from the center of the planetary gear 22. In addition,
A follower 24 is provided on the eccentric pin 23.

A pair of guide bars 25 are provided on the main body frame 10 in parallel with each other in the lateral direction.
A first slider 26 is mounted so as to be able to reciprocate, and a groove 27 is formed on the lower surface of the first slider 26 in a direction perpendicular to the guide rod 25, so that the follower 24 of the eccentric pin 23 is the groove 2
A first slider 26 is provided in engaging relationship within 7 .

Further, a guide rod 25 is attached to the first slider 26.
Rack 28 is provided along the length at both end edges parallel to the main body frame 10, and two pinions 29, which are pivotally supported on the main body frame 10, are meshed with each rack 28, respectively. On the other hand, the pinion shaft 30 of each pinion 29 projects upward from the shelf 10a of the main body frame 10, and an arm 31 is provided at each projecting portion.
Further, a follower 32 is provided at the tip of the arm 31.

Furthermore, the main body frame 10 is provided with three guide rods 33 parallel to the guide rod 25,
A second slider 34 is attached to the guide rod 33 so as to be able to reciprocate, and a pair of sliding grooves 35 are provided on the lower surface of the second slider 34 in a direction perpendicular to the guide rod 25. The follower 32 of each arm 31 is provided at a position where it is engaged with each sliding groove 35.

The main body frame 10 has an open upper surface, and the second slider 34 is attached to the main body frame 10.
installed in the opening of the A pair of guide grooves 3 are provided at both ends of the upper surface of the second slider 34 in a direction perpendicular to the guide rod 33 (parallel to the sliding groove 35).
6 is formed, and a feed bar receiver 38 having a feed bar 37 mounted in each guide groove 36 is mounted so as to be slidable only in a direction orthogonal to the conveyance direction of the processed product. The feed bar 37 attached to the feed bar receiver 38 moves together with the movement of the second slider 34 to cause the feed bar 37 to move forward and return, and also performs another drive (not shown) while the second slider 34 is stopped. The device moves the feed bar 3 toward and away from each other in the guide groove 36.
7 to perform clamp/unclamp movements.

In the embodiment configured as described above, when the drive shaft 11 rotates in synchronization with the press and the drive gear 12 rotates, the main gear 15 rotates via the idle gears 13 and 14, thereby causing the planetary gear 22 to rotate. It revolves around the sun gear 21 while rotating. At the same time, the follower 24 of the eccentric pin 23
The first slider 26 is reciprocated along the guide rod 25, and the rack 28 of the first slider 26 rotates the pinion 29 in forward and reverse directions.

Further, the follower 32 of the arm 31 provided on the pinion shaft 30 of each pinion 29 is connected to the second slider 34.
Since the pinion 2 is engaged with the sliding groove 35 of
9 causes the second slider 34 to reciprocate along the guide rod 33. As described above, the reciprocating movement of the second slider 34 is a reciprocating movement in the longitudinal direction of the feed bar receiver 38 together with the feed bar 37, so that the reciprocating movement section of the second slider 34 is the advance return movement of the feed bar 37. Become.

In the embodiment, the stop angle at the stroke end of the feed bar is determined by the eccentricity of the eccentric pin 23 and the pinion 2 that meshes with the rack 28 of the first slider 26.
It can be arbitrarily selected by changing the number of teeth of 9.

Further, the stroke length of the feed bar can be adjusted by changing the length of the arm 31 provided on the pinion shaft 30.

(Effects of the Invention) The present invention provides a first planetary gear system using a planetary gear that meshes with a sun gear that is provided concentrically with a main gear that rotates in synchronization with the drive section of the press, and an eccentric pin that is provided at an eccentric position of the planetary gear. The slider is reciprocated, and the second slider is reciprocated by utilizing the reciprocating movement of the first slider and the swinging motion of an arm provided coaxially with the pinion via a rack and pinion mechanism. , the stop angle at the stroke end of the feed bar can be arbitrarily selected by changing the eccentricity of the eccentric pin and the number of teeth of the pinion that meshes with the rack of the first slider, and the stop angle at the stroke end of advance return movement can be selected arbitrarily. The amount of displacement is extremely small, and therefore, this minute displacement amount can be literally treated as something in a negligible range.

Further, the present invention has high utility value as a transfer device for not only two-dimensional but also three-dimensional feeding. Furthermore, the present invention can also be used in specifications where the feed stroke is long or the inner width of the feed bar is increased by driving the second slider that directly drives the feed bar with two arms as in the embodiment. For example, it can be used with large presses with a feed length of 1000 mm or more.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the entire device assembled, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along line 3-3 in Fig. 1, and Figs. It is a schematic diagram of Apress. 10...Main frame, 11...Drive shaft, 12...Drive gear, 13, 14...Idle gear, 15...
Main gear, 16...Bearing member, 17...Vertical shaft, 1
8, 20... Bevel gear, 19... Rotating shaft, 21... Sun gear, 22... Planetary gear, 23... Eccentric pin, 24... Follower, 25... Guide rod, 26... First slider, 27... Groove, 28... Rack , 29...pinion,
30... Pinion shaft, 31... Arm, 32... Follower, 33... Guide rod, 34... Second slider, 3
5...Sliding groove, 36...Guide groove, 37...Feed bar, 38...Feed bar receiver.

Claims (1)

[Claims] 1. A main gear that is rotationally driven in synchronization with the drive section of the press, a sun gear that is provided concentrically with the main gear, a planetary gear that meshes with the sun gear and is pivotally supported by the main gear, and a planetary gear that is provided at an eccentric position of the planetary gear. an eccentric pin, a first slider that engages with the eccentric pin and moves back and forth along the conveyance direction of the pressed product, and an arm that engages with and is coaxial with racks provided on both sides of the first slider. a pinion that is pivotally supported on the frame; a second slider that engages with the follower provided on each arm and moves back and forth along the conveyance direction of the pressed product; Consisting of a feed bar holder that is slidable only in a direction perpendicular to the direction of movement, and a feed bar attached to the feed bar holder, the main gear is rotated in forward and reverse directions by press operation to move the feed bar in advance and return motions. A conveying device for processed products in a transfer press, which is characterized by: