JPS5890448A - Conveyor device of work - Google Patents

Abstract

PURPOSE:To make it possible to operate a device with a single driving source by forwardly and backwardly turning a motor while driving a link mechanism by a one-directional clutch provided on a cam shaft, a cam and a Zeneva wheel in a mechanism where a tansfer bar vertically moves and reciprocates. CONSTITUTION:Forwardly turning a motor 60 causes a rotary shaft 18 to be forwardly turned to rotate an arm 19, while during this period a cam shaft 40 is driven via a one-directional clutch 63 to turn a cam shaft 41. A roller 44 and a link 42 in contact with the cam 41 are rocked, allowing a transfer bar 3 to be lifted. The roller 20 of the arm 19 drives a wheel 14 whose rotation rockes a rotary shaft 10 and a rocking lever 11. A roller 12 descends along a guiding longitudinal groove 13 to fit the pin of the transfer bar in the pin hole of a work and to separate the work from the positioning pin of a conveyor bench 2 while lifting the work from the conveyor bench 2. The returning motor of the bar is performed by backwardly turning the motor 60.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece conveyance device that uses a transfer bar that moves up and down and reciprocates to lift the workpiece and convey it a predetermined distance.

Conventionally, this type of conveying device has been equipped with a vertical movement mechanism that moves the transfer bar up and down and a reciprocating movement mechanism that moves the transfer bar back and forth.The vertical movement mechanism and the reciprocating movement mechanism are driven by a drive source such as a hydraulic cylinder or an electric motor. A device is known in which each of the devices is operated independently.

However, with this structure, the transfer bar will not rise correctly unless each drive source is controlled in synchronization.

Since the movement does not occur in the order of forward movement, downward movement, and backward movement, limit switches, relays, and pulp for operation switching are required to detect each movement, resulting in high costs and mechanical shock, which reduces the durability of the moving parts. Furthermore, the rising and falling speed of the transfer bar cannot be made faster, resulting in longer operation time.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to move the transformer 7 upper upward, forward, and upward by a single driving source.
It is an object of the present invention to provide a workpiece conveying device that can correctly perform descending and backward movements.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall schematic front view, in which a pair of front and rear transport platforms 2 are horizontally fixed across a plurality of pairs of front and rear supports 1°1 provided at intervals in the longitudinal direction. Transport platform 2/2
A transfer bar 3 is disposed in between in the longitudinal direction, and transport bins 4 are erected on the transfer bar 3 at predetermined intervals in the longitudinal direction.

Workpieces A are placed on the pair of transport tables 2.2 at predetermined intervals in the longitudinal direction, and the bins 5 installed upright on the pair of transport tables 2.2 fit into the bin holes 61/c of each workpiece A. At the same time, each workpiece AK has a bin hole 7 that fits into the transport bin A.
is perforated.

Nihagai 1 grooves 30 are formed in the front and rear surfaces of the transformer 7 aperture 3 in the longitudinal direction, and each guide groove 30
The guide rollers 33 of two pairs of levers 32 supported swingably through the VC shafts 31 of each of the conveyor tables 2 are faced, and the arms 34 fixed to the respective shafts 31 are connected through rods 35. It is.

When the rod 35 is reciprocated in the longitudinal direction, the arm 3
4, the shaft 31 rotates forward and backward, the lever 32 swings up and down, and the transfer bar 3 is moved up and down through the guide roller 33 and guide #I30.

A reciprocating mechanism B and a vertically operating mechanism C are installed at a position near one end in the longitudinal direction between the pair of conveyance tables 2.2 at intervals in the longitudinal direction.

The reciprocating actuator IIB is constructed as shown in FIG. In other words, a swing lever IIK roller 12 fixed to the rotating shaft io is provided, and this row 5-12 is connected to the transformer 7 upper 3.
A Geneva wheel 14 is fixedly attached to the rotating shaft 10 so as to face a guide longitudinal groove I3 provided in the middle in the longitudinal direction of the Geneva wheel 14. A long groove 1 is located between the second arc grooves 15 and 16.
7 and is fixed to the rotation shaft 18.
, a row 220 that fits into the long groove 17 is provided, and the rotary shaft 18 is provided with a row 220 that fits into the long groove 17 . A guide (gray) 22 having a semicircular arcuate surface 21 that fits into the guide (gray) 22 is fixedly installed.

The vertical operation mechanism C is 5K as shown in FIG.

The cam 41 provided on the camshaft 40 is connected to the link 42Vc pin 43
One end of the link 42 is in contact with the camshaft viewing aperture (roller) 44 supported by the support IV (the shaft 4
5, and an arm 46 is mounted on the shaft 45.
The arm 46 is provided with a roller 47 facing the guide groove 30, and the link 42 is connected to the rod 35 by a pin 48. 49 is a pressing cylinder which is pivotally connected to the link 42 with a pin 50, and which is connected to the roller 44 and the cam 4.
1 are in contact with each other.

51.52 is the 1st and @2 docks provided with 0/)'351C, and the 1st and 2nd docks provided on the fixed side. Second switch 53.5
It is facing 4.

FIG. 5 is an explanatory diagram of the power transmission system between the reciprocating mechanism B and the vertically operating mechanism C, in which the output of the motor 60 is transmitted to the rotating shaft 1g via the reducer 61, and the gear 6 provided on the rotating shaft 18
2 meshes with a gear 64 provided on the camshaft 40 via a mouth direction clutch 63, and the number of teeth of the gear 62 and gear 64 is 3 to 20.
In addition, the rotational force of the motor 60 in the reverse direction is prevented from being transmitted to the camshaft 40 by the one-way clutch 63.

Next, the operation will be explained.

When the motor 60 is rotated in the normal direction from the state shown in the figure, the rotation axis IB rotates in the normal direction.[While the arm 19 rotates 75 degrees from the position a in the direction of arrow A and rotates to the position b, the camshaft 40 rotates in the direction of the arrow. The position where it rotates qO degrees and contacts the roller 44 is the minimum diameter γ.
to the maximum diameter R, the link 42 swings about the shaft 45 in the convex direction of the arrow, and the arm 46. The transfer bar 3 is raised via the roller 47 guide groove 30. At the same time, the rod 35 moves in the two directions of the arrows via the pin 48, and each of the other arms 34 swings in the direction of the arrow H, and the shaft 31. Lever 32. Since the transfer bar 3 is raised via the roller 33 and the guide groove 30, the transfer bar 3 is raised.

At this time, the swinging lever! 1 roller 12 has a guide longitudinal groove 13
relative decline along.

As a result, the bin 4 of the transfer bar 3 fits into the bin hole 7 of the worker and is lifted from the conveyance table 2 to separate the bin 5 and the bin hole 6.

Further, when the motor 60 rotates forward, the arm 19 rotates 90 degrees from the position b to the position C, and the transformer 7 aber 3 is moved through the roller 20 and the guide longitudinal groove 13 to the guide groove 30. It reciprocates to the right in the figure via rollers 33 and 47.

From this point K, the workpiece A is conveyed to the right in the figure.

At this time, the arc surface 21 of the guide plate 220 fits into the second arc $16 of the Geneva wheel 14, and the roller 20 is moved into the long groove 1.
7 to fit correctly.

On the other hand, since the camshaft 40 rotates in the direction of the arrow and the maximum diameter ratio of the cam 4I continues to contact the roller 44, the lever 42 does not swing and the transfer bar 3 is held at the raised position.

Then, the motor 60 further rotates forward and the rotating shaft 16 rotates 240 degrees.
When the arm 19 rotates once, the arm 19 moves to the d position, and during this time the camshaft 40 also rotates further and the minimum diameter r comes into contact with the (low) 44, the link 42 swings in the direction opposite to the arrow, and the transfer bar 3 descends. do.

As a result, the bin 4 is pulled out from the bin seat 7 of the worker and placed on the conveyance table 2, and the bins 5 and 6 are fitted together.

The rise and fall of this transformer 7 aber 3 is 1st degree, 2nd dock 51.52 and #! 1. 1st. It is detected at switches 53 and 54.

After that, when the motor 60 is reversed, the rotating shaft 18 rotates in the opposite direction of the arrow A, and the arm 19 rotates in the opposite direction, and the transformer 7 aber 3 is moved back through the lever 1 troller 12 guide longitudinal groove 13 as described above. let At this time, the arcuate surface 21 of the guide plate 22 is aligned with the first arcuate groove 1 of the Geneva wheel 14.
5 and fit the roller 20 correctly into the long groove 17.

On the other hand, since the rotation of the motor 60 is not transmitted to the camshaft 40 by the one-way clutch 63 and the camshaft 40 does not rotate, the transfer bar 3 is held in the lowered position.

If the above operations are shown as factors, the factors will be as shown in FIG. 6, FIG. 7, and FIG. 8.

As described above, one motor 60 is rotated in the normal direction.

By reversing the rotation, the transfer bar 3 can be moved up, forward, down, and back to convey the workpiece A. Since there is no need for ON-OFF control such as an electromagnetic clutch, the cost is reduced, and the transfer bar 3 The transport operation time can be shortened by increasing the raising and lowering speed of the robot.

According to the embodiment, the long groove 17 is also
The rubber 20 can be reliably fitted, and the operations of starting and finishing the forward movement and starting and finishing the backward movement become smooth.

In addition, the camshaft 40 of the vertical operation mechanism C and the rotary shaft 8 of the reciprocating mechanism B are interlocked.

Each movement continues smoothly and there are no gaps between each movement.

In addition, a cam 41 is used in the vertical operation mechanism C, and it can operate smoothly at any acceleration or deceleration. ) The present invention is as described above, and it is possible to correctly raise the transfer bar 3 with one driving source.
It can move forward, downward, and backward, and has a simple structure and low cost, and can shorten the transport operation time by increasing the ascending and descending speeds.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an overall front view, FIG. 2 is a front view of the reciprocating mechanism, and FIG. 3 is a second view of the reciprocating mechanism.
Figure 4 is a front view of the vertical operation mechanism,
Figure 5 is an explanatory diagram of the power transmission system, and Figures 6, 7,
FIG. 8 shows factors showing each operation. 2 is a conveyance table, 3 is a transfer bar, B is a forward and backward operation mechanism, C is a vertical operation mechanism, 14 is a wheel, 17 is a long groove, 1
8 is a rotating shaft, 19 is an arm, 40 is a camshaft, 41 is a cam, 42 is a link, 6° is a drive source, and 63 is a one-sided clutch.

Claims (1)

[Claims] The transfer bar 3 is mounted on the conveyor table 2 so that it can move vertically and reciprocally, and the transfer bar 3 is moved to the reciprocating mechanism B.
In the workpiece conveyance device connected to the vertical movement mechanism C, an arm 19 provided on the rotating shaft 18 can be freely fitted into and removed from the long groove 17 in the radial direction of the wheel 4, and the wheel 14 is rotated. A reciprocating mechanism B is constructed by connecting to the transfer bar 3 through a means for converting the reciprocating motion, and a cam 41 mounted on a camshaft 40 is brought into contact with a swingable link 42, and the link 42 is It is connected to the transfer bar 3 via a means for converting a swinging motion into an up-and-down motion to constitute a vertical operation mechanism C, and the core camshaft 40 and the rotating shaft 18 are connected via a one-way clutch 63. A workpiece conveyance device characterized in that the rotating shaft 18 is connected to a drive source 60.