JPS6323866B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press work progressive feeding device that sequentially transfers workpieces to a plurality of molds arranged at equal intervals.

Generally, transfer press machines, which press workpieces step by step using multiple molds to form products, transfer each workpiece on the mold to the next mold that is close to it. Although the workpieces are fed sequentially at the same time, the movements of the fingers that hold the workpieces are horizontal forward and backward movements to clamp and unclamp the workpieces, lifting and lowering movements to lift and lower the workpieces on the mold, and movements along the arrangement direction of the workpieces. Cary,
Because a three-way movement function is required, including a return parallel movement, in a press machine equipped with several molds, each member to perform each of the above operations becomes longer and larger. Therefore, in order to arrange each member so that they do not interfere with the mold, the combination structure of each member becomes complicated and installation is difficult.
There are also problems such as maintenance and management being difficult.

In addition, the prior art of the workpiece feeding means is as follows:
As shown in Japanese Patent Publication No. 47-48995 and Japanese Patent Publication No. 44-6504, both have movement functions in only two directions: carry, return, clamp, and unclamp. Kosho 48−
The items described in Publication No. 42917 are clamps,
Although it has motion functions in only two directions: unclamping, lifting, and down, there is still room for improvement in order to simplify the configuration of the operating part and allow the workpiece to be fed in three directions at high speed. has been done.

The present invention has been made in view of the above points, and a ball spline mechanism in which a ball holder containing a large number of balls is fitted to a spline shaft is such that the ball holder is movable in the axial direction and has a radial radius. Focusing on the feature that the rotation of the ball holder is restrained by the interposition of the ball in the direction, by appropriately utilizing each feature, it is possible to create a feed bar with fingers for holding the press work in three directions. It is an object of the present invention to provide a press work progressive feeding device that can operate with a simple structure and is lightweight.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described in detail below with reference to one embodiment.

As shown in FIGS. 1 to 4, reference numeral 1 denotes a sequential feeding device that sequentially transfers press works 2, 2, . . . to a plurality of press molds 3, 3, . . . arranged at a pitch P. The progressive feeding device includes two mutually parallel feed bars 5, 5 each having a plurality of fingers 4, 4, . The first spline shafts 7, 7... are fixed in parallel via the first spline shafts 7, 7..., and the feed bars 5, 5 are rotatably supported by support members 8, 8... at a position below the feed bars 5, 5 in a direction perpendicular to the feed bars. two second spline shafts 9, 9, a large number of balls 10,
10... and fitted to the first spline shaft 7 so as to be movable only in the direction of the first spline shaft 7, and a large number of balls 1.
0, 10..., and is fitted to the second spline shafts 9, 9 so as to be movable only in the direction of the second spline shafts 9, 9 and rotate integrally with respect to the second spline shafts 9, 9. ball holders 12, 12... and second ball holders 12 of second spline shafts 9, 9;
Arms 14, 14... extend from 12... and are pivotally connected to first ball holders 11, 11... of first spline shafts 7, 7... at both ends of feed bars 5, 5 by pins 13, 13... , a connecting bar 44, which will be described later, that connects the two second spline shafts 9 and rotates them in mutually opposite directions, and a second spline shaft 9,
Short racks 26, 26, which will be described later, are provided in parallel with 9 and have lower surface teeth 25, intermediate pinions 27, 27, which will be described later, are meshed with the short racks, and short racks 26, 26 are provided below the intermediate pinions. Long racks 29, 29, which will be described later, are arranged in parallel and have upper surface teeth 28, and the upper surface teeth are engaged with the intermediate pinions 27, 27, and short racks 26, 26.
and the second ball holder 1 of the second spline shafts 9,9.
2, 12... and one end thereof is rotatably connected to the second ball holder 12, 12... and the long racks 29, 29.
and the second ball holder 1 of the second spline shafts 9,9.
2, 12..., and one end of which is rotatably connected to the second ball holder 12, 12..., a second spline shaft 9,
9 in opposite directions to feed the feed bar 5,
5 to the horizontal plane X of the press work 2, 2... arrangement;
14... on the second spline shafts 9, 9 in the axial direction of the second spline.
a second drive means 16 for moving the feed bars 5, 5 to horizontally move the feed bars 5, 5 back and forth from both sides of the press work 2, 2... arrangement in a clamping motion A and an unclamping motion E; Guide rollers 17, 17 provided at the ends...
is engaged with the press work 2, and the feed bar is engaged with the press work 2,
2... is formed to include a third drive means 18 for performing a carry movement C and a return movement F that move in parallel along the arrangement direction.

That is, a ball spline mechanism 19 is constructed by coupling the first spline shaft 7 and the second spline shaft 9 to the first ball holder 11 and the second ball holder 12, respectively. 11. Second ball holder 1
A large number of balls 10, 10, .
20, 20, and are arranged along the protrusions, the first ball holder 11,
The second ball holder 12 has protrusions 20, 20, 20
It is movable in the axial direction by the balls 10, 10, which roll along the spline shafts 7, 9.
For the movement in the outer circumferential direction, each ball 10,1
0... is prevented from rolling by the side surfaces of the protrusions 20, 20, 20, so that the first ball holder 1
1. When an external force is applied to the second ball holder 12, the first spline shaft 7, and the second spline shaft 9 in the outer circumferential direction, they are fixed together and rotated simultaneously.

The first driving means 15 drives one of the second driving means 15.
A rotating link 21 fixed to the intermediate portion of the spline shaft 9, and a reciprocating rod 24 having a workpiece 22 at one end pivotally supported on the rotating link by a connecting pin 23.
and a first driver (not shown) such as a cylinder connected to the other end of the reciprocating rod.

The second drive means 16 is provided at a position below the second spline shafts 9 and parallel to the second spline shafts, and is a short rack 2 having a lower surface toothed portion 25.
6, 26, intermediate pinions 27, 27 meshed with the short racks, and intermediate pinions 27, 27 disposed below the intermediate pinion in parallel with the short racks 26, 26, and whose upper surface toothed portions 28, 28 are connected to the intermediate pinions 26, 26. pinion 27,2
7, the long racks 29, 29, the short racks 26, 26, the long racks 29, 29, and the second ball holder 1 of each second spline shaft 9, 9.
short leg brackets 30, 30 and long leg brackets 31, 3, one end of which is rotatably connected to the end of the second ball holder so as to connect the second ball holder with the second ball holder;
1, and a drive pinion 33 meshed with a lower surface toothed portion 32 formed on one of the elongated racks 29.
and a second drive device (not shown) such as a motor capable of forward and reverse rotation connected to the other end of the rotation shaft 34 of the drive pinion. 29 and the short rack 26 are moved in opposite directions, and the movement of the racks 26, 28 is transmitted to the feed bars 5, 5.

The third driving means 18 includes a guide roller 17,
A slide bar 35 engaged with 17... and brackets 36, 36 connected to the back of the slide bar
reciprocating links 38, 38 which are pivotally supported by connecting pins 37, 37, and a third driving machine (not shown) such as a cylinder connected to the other end of the reciprocating links and which moves the slide bar 35 forward and backward. It is formed. 39, 39... are guide rollers that movably support the long racks 29, 29, and 40 is an interlocking mechanism for rotating the second spline shafts 9, 9 in opposite directions. Interlocking arms 41, 41 fixed to the ends of the second spline shafts 9, 9
and a connecting bar 44 with yokes 42, 42 at both ends pivotally supported by connecting pins 43, 43 on the interlocking arm.
It is formed by. 45 is a connecting shaft of the intermediate pinions 27, 27 supported by a bearing (not shown).

Next, the operation of the present invention will be explained.

First, the rotation shaft 34 of the second drive means 16 is driven in the forward rotation (arrow a) direction to cause the feed bars 5, 5 in the standby position (the position shown in FIG. 1) to perform a clamping movement A, and each finger 4 , 4... clamp the press works 2, 2..., and the rotating shaft 34 is stopped in this clamped state.

Next, the reciprocating rod 24 of the first drive means 15 is driven in the forward (arrow b) direction to move the feed bars 5, 5.
in a lifting motion B, and in this state the reciprocating rod 24
stop.

Subsequently, the reciprocating links 38, 3 of the third drive means 18
8 in the forward direction (arrow c) to move the feed bars 5, 5 into a carry motion C, and transfer each press work 2, 2... by the pitch P of the press dies 3, 3... to the adjacent dies. 3 and stop the reciprocating links 38, 38.

The reciprocating rod 24 of the first driving means 15 is again driven in the backward (arrow d) direction to cause the feed bars 5, 5 to move down D, and each press work 2, 2... is placed on the press mold 3, 3..., respectively. Then, the reciprocating rod 24 is stopped.

Next, the rotary shaft 34 of the second drive means 16 is driven in the direction of reverse rotation (arrow e) to cause the feed bars 5, 5 to undergo an unclamping movement E, and the fingers 4, 4... are separated from the press works 2, 2... Rotating shaft 34
stop. This unclamping movement E and the clamping movement A are carried out symmetrically and at high speed by the short racks 26, 26, the intermediate pinions 27, 27 and the long racks 29, 29.

Subsequently, the reciprocating links 38, 3 of the third drive means 18
8 is driven in the backward (arrow f) direction to cause the feed bars 5, 5 to perform a return movement F to return to the standby position, and the reciprocating links 38, 38 are stopped to complete one cycle of the forward feeding operation.

According to the above-mentioned configuration, the present invention provides a feed bar with fingers that has a guide section and a vertical drive section for carry motion and return motion, clamp motion and unclamp motion, and a ball formed by combining a spline shaft and a ball holder. By applying a spline mechanism and a connecting bar, the structure is simple and compact, and the bolster area can be used effectively.The weight of each moving member is light, so the driving force is small, allowing for high-speed progressive movement. This has the excellent effect of significantly improving both workability and productivity.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the device of the present invention, and FIG. 1 is a perspective view showing the main parts of the progressive feed device, FIG. 2 is a longitudinal cross-sectional view of the ball spline mechanism with the part shown in FIG. A cross-sectional view of the spline shaft taken along the line - in FIG. 2, and FIG. 4 are diagrams for explaining the operating order of the progressive feeding device. 1... Progressive feeding device, 2... Press work, 3...
... Press die, 4 ... Finger, 5 ... Feed bar, 7 ... First spline shaft, 9 ... Second spline shaft, 10 ... Ball, 11 ... First ball holder, 12 ... Second ball Holder, 14...
Arm, 15...First drive means, 16...Second drive means, 18...Third drive means, 25...Lower tooth portion, 26...Short rack, 27...Intermediate pinion, 28...Upper tooth Part, 29... Long rack, 3
0...Short leg bracket, 31...Long leg bracket, 44...Connection bar, A...Clamp movement, B
...Lift movement, C...Carry movement, D...Down movement, E...Unclamp movement, F...Return movement, X...Horizontal plane of work arrangement.

Claims (1)

[Claims] 1 Two mutually parallel feed bars equipped with fingers perform clamping and unclamping movements that move horizontally from both sides of the workpiece arrangement, carry and return movements that move parallel to the workpiece arrangement direction, and movement of the workpiece arrangement. In a progressive feed device that sequentially transfers press workpieces to press molds arranged at equal intervals by performing three movements: a lift movement that moves up and down with respect to a horizontal surface, and a down movement, the length of the feed bar is attached to each end of the feed bar. A first spline shaft fixedly fixed in parallel to the horizontal direction, two second spline shafts parallel to each other supported at a position below the feed bar so as to be rotatable in a direction perpendicular to the feed bar, A first ball holder that contains a ball and is fitted to the first spline shaft so as to be movable only in the direction of the first spline shaft, and a first ball holder that contains a number of balls and is movable only in the direction of the second spline shaft and is fitted to the second spline shaft. a second ball holder fitted to the second spline shaft so as to rotate integrally with respect to the second ball holder; an arm pivotally attached to the ball holder, a connecting bar that connects the two second spline shafts and rotates them in opposite directions, and a short rack that is provided parallel to the second spline shaft and has a toothed portion on the lower surface; an intermediate pinion meshed with the short rack; a long rack disposed below the intermediate pinion in parallel with the short rack and having an upper surface toothed portion with the upper surface toothed portion meshed with the intermediate pinion; and a short rack. and a second ball holder of the second spline shaft, and a short leg bracket having one end rotatably connected to the second ball holder, and a long rack and the second ball holder of the second spline shaft. and one end is the second
A long leg bracket rotatably connected to the ball holder, a first driving means for rotating the second spline shaft in opposite directions to lift and lower the feed bar, and a second spline for each arm. a second driving means for moving the elongated rack on the shaft in the direction of the second spline axis to clamp and unclamp the feed bar; and a second driving means for engaging with both feed bars to carry and return the feed bar. 1. A progressive feed device for a press work, characterized in that the device includes a third drive means, and is configured to guide movement of a feed bar in three directions by each spline shaft and a ball holder.