JPS6216917A - Phase adjusting method for conveyor - Google Patents

Abstract

PURPOSE:To make phase adjustment easy, by installing each helical gear in both driving and driven shafts for engagement, and constituting the helical gear at the side of the driven shaft to be slidable in a shaft direction, in case of plural conveyors driven with the same driving mechanism. CONSTITUTION:At the time of timing adjustment, leaving each conveyor line operated intact, an adjusting shaft 28 of a second conveyor line 2 is rotated in both c.w. and c.c.w. directions via an adjusting handle 30, making this adjusting shaft 28 go forward and backward by an external thread 31 and an internal thread member 32, and the helical gear 10 installed in a driven shaft 8 is made go forward and backward as well. With this movement, an intermeshing phase between the helical gear 10 of the driven shaft 8 and a helical gear 7 of a driving shaft 5 is shifted to some extent, varying each phase of both these shafts 5 and 8, and only moving speed of a conveying arm 23 of the second conveyor line 2 is varied, then timing between these first and second conveyor lines is made congruent. Thus, phase adjustment be comes easy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a transport device having a plurality of transport lines, each of which is driven by a drive shaft of the same drive mechanism via a suitable power transmission mechanism such as a chain. The present invention relates to a phase adjustment method for adjusting the phase of each conveyance line so that their timings match.

Conventionally, in a conveyance device that has a plurality of conveyance lines and each conveyance line is driven by the drive shaft of the same drive mechanism via an appropriate power transmission mechanism such as a chain, each conveyance line The workpieces are transported in a preset correlation with each other, and in order to accurately transfer the workpieces between adjacent transfer lines, the timing of receiving and transferring the workpieces between each transfer line must be aligned. , it is necessary to adjust the phase of each conveyance line. Conventionally, when the power transmission mechanism is a chain, this phase adjustment is performed by stopping the conveyor line, pulling the chain, and rotating the sprocket wheel slightly to change the phase of the conveyor line relative to the drive shaft. There is.

B < °C. Conventional phase adjustment is performed by stopping the conveyor line, which is very inefficient. In addition, even if you make adjustments while stopped, you will not be able to accurately determine the phase during actual operation, and even if you restart operation after making adjustments, the phase will not be stable until the chain and sprockets become familiar with each other. It takes time to determine whether a proper adjustment has been made, and if readjustment is necessary, the conveyance line must be stopped again, resulting in very poor work efficiency.

In order to achieve this, the present invention arranges a common drive shaft of a drive mechanism for driving a plurality of transport lines and a driven shaft of a power transmission mechanism of the transport lines driven by the drive shaft to be orthogonal to each other, A helical gear is fixed to the drive shaft, and a helical gear meshing with the helical gear is attached to the driven shaft so that it can slide in the axial direction and rotate together with the driven shaft. The phase of the driven shaft relative to the drive shaft is changed by moving a helical gear provided in the conveyor line in the axial direction using an appropriate reciprocating means, thereby changing the phase of the conveyance line.

This invention is a method of setting up one of the plurality of conveyance lines while each of the conveyance lines is in operation, when the phases of adjacent conveyance lines are out of alignment and the timing of receiving and passing the workpieces does not match. A helical gear provided on a driven shaft is slid in the axial direction by a reciprocating means to change the phase of the conveyance line to match the timing with the other conveyance line.

FIG. 1 is a schematic perspective view showing an example of a conveying device for carrying out the method of the present invention. Conveyance line (1) (2
)(3) are arranged in a U-shape, and the first conveyance line (1)
The workpiece (W) that has been pitch-fed is taken out from the first conveyance line (1) on the second conveyance line (2) without changing the conveyance posture of the workpiece (W), and transferred to the third conveyance line ( 3), and pitch feeding is performed again on the third conveyance line (3). and the first
- The third conveyance lines (1), (2), and (3) are all driven by the same drive mechanism, and are driven in a certain correlation with each other.

The first conveyance line (1) and the third conveyance line (3
) is, for example, a holding means (la) that holds a workpiece (W).
Endless bell I- with a large number of (3a) at each fixed pitch
(lb) (3b) are circulated, and the endless bells (lb) (3b) are each driven by a power transmission mechanism (not shown) such as a chain. Note that the first transport line (1) and the third transport line (3) transport the workpiece (W) in opposite directions.

The second transport line (2) for transferring the workpiece (W) from the first transport line (1) to the third transport line (3) has the structure shown in FIGS. 2 and 3. That is, in the same figure, (4) is a frame formed in a box having an oven structure, and (5) is a bearing (6) (6) at the bottom of the frame (4).
A common drive mechanism (not shown) drives the first transport line (1) and the third transport line (3) with a drive shaft rotatably supported via a drive shaft (not shown).

(without). A helical gear (7) is integrally connected to a predetermined position of the drive shaft (5). (8) is a driven shaft for power transmission that is rotatably supported in the vertical and horizontal directions (4a) (4a) of the frame (4) via bearings (9) (9), and is located above the drive shaft (5). The helical gear (10), which is arranged orthogonally and meshes with the helical gear (7) provided on the drive shaft (5) at a predetermined position on the outer periphery, is inserted into the shaft via the sliding key (10a). It is attached so that it can slide in the direction and rotate together, and it also has a helical gear (1
Two sprocket wheels (11) and (12) constituting a power transmission mechanism are fixedly installed in front of the motor. (13
) is attached to the upper end of the frame (4) with a bearing (14) (14
), and a disc-shaped turntable (15) is fixed to the end of the shaft. Further, a sprocket wheel (16) constituting a power transmission mechanism is fixedly installed in the middle part of the main shaft (13), and the sprocket wheel (16) and the sprocket wheel (11) fixedly installed on the driven shaft (8) are connected to each other. A power transmission chain (17) is stretched. (18) is a bearing (19) attached to the main shaft (13).
) It is a cylindrical shaft rotatably mounted via (19), and a large diameter sun gear (20) is fixed at one end, and a sprocket wheel (21) that constitutes a power transmission mechanism is fixed at the other end. Then, the sprocket wheel (21) and the driven shaft (
A power transmission chain (22) is stretched between the sprocket wheel (12) and the sprocket wheel (12) fixedly attached to the sprocket wheel (12).

(23) is a transport arm that supports the workpiece (W), and is arranged at, for example, six locations around the front surface of the turntable (15) at equal intervals around the circumference, and is integrally connected to the rear rotating shaft (27).
) penetrates the turntable (15) and protrudes rearward, and is rotatably supported by a bearing case (24) and bearings (25) (25) provided on the back side of the turntable (15), and the rear end A small-diameter planetary gear (26) is fixedly attached to the sun gear (20) and always meshes with the sun gear (20). (28) is a reciprocating means, for example, an adjustment shaft, which is rotatably and axially slidably supported through the rear end crosspiece (4C) of the frame (4), and the tip thereof is provided on the driven shaft (8). It is relatively rotatably connected to the helical gear (10) via a bearing (29), and an adjustment handle (30) is fixedly installed at the rear end. Further, the adjustment shaft (28) is provided with a male thread (31) on its outer circumferential surface from the middle part to the rear end, and the male thread (31) is connected to the female thread member (32) fixed to the crossbar (4c).
). (33) is a lock nand screwed onto the male screw (31) of the adjustment shaft (28).

The second transport line (2) has two transport arms (23) (
23) are arranged so that one side faces the first conveyance line (1) and the other side faces the third conveyance line (3).

When the drive mechanism operates, the first transport line (1
) and the third conveyor line (3) are operated, and at the same time the drive shaft (5) is rotated by the common drive mechanism, and the driven shaft (8) is rotated via the helical gears (7) (10). do. Then, the main shaft (13) rotates via one sprocket wheel (11), chain (17), and sprocket wheel (16) provided on the driven shaft (8),
Turntable (15) integrally connected to main shaft (13)
to rotate each transfer arm (23) (23), - to revolve around the main shaft (13), and at the same time, the sprocket wheel (12), chain (22), and sprocket wheel provided on the driven shaft (8) are rotated. (21) to rotate the cylindrical shaft (18) to rotate the sun gear (20) provided on the cylindrical shaft (18). and the sun gear (
20) and a planetary gear (2) connected to the transfer arm (23).
Due to the meshing relationship with the first transport line (
The receiver picks up the workpiece (W) from 1), passes the workpiece (W) on the transfer arm (23) to the third transfer line (3) at a 180° opposing position, and transfers the workpiece (W) to the first transfer line. Transfer from line (1) to third conveyance line (3). still,
The ratio of the sun gear (20) and the planetary gear (26), the rotation speed of the main shaft (13), and the rotation speed of the cylindrical shaft (18) are set to a predetermined ratio and the rotation speed of the cylindrical shaft (18) so that the transfer arm (23) can always be maintained in a horizontal state. The rotation speed is set.

When transporting the workpiece (W), the second transport line (2) and the first transport line (1) or the third transport line (3)
If there is a slight difference in the timing of transfer between the two transfer lines, the adjustment shaft ( 28),
Rotate forward or backward through the adjustment handle (30),
The adjustment shaft (28) is moved forward or backward by the screwing relationship between the male thread (31) provided on the adjustment shaft (28) and the female thread member (32) fixed to the frame (4), and the bearing (29) is moved forward or backward.
) is connected to the helical gear (10) on the driven shaft (8).
) along the driven shaft (8), thereby shifting the meshing phase between the helical gear (10) and the helical gear (7) provided on the drive shaft (5). Drive shaft (
By changing the phase of the driven shaft (8) with respect to 5), only the moving speed of the transport arm (23) of the second transport line (2) is made slightly faster or slower. Match the timing with the No. 3 conveyance line (3).

The phase adjustment mechanism using helical gears (7) and (10) is applied not only to the second conveyance line (2) but also to the first conveyance line (1) and the third conveyance line (3). They are similarly provided so that the phase can be freely adjusted between adjacent conveyance lines. Further, in the above embodiment, three conveyance lines are provided, but the present invention may be similarly applied even if a larger number of conveyance lines are provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an example of a conveyance apparatus for carrying out the method of the present invention, and FIGS. 2 and 3 are a front view and a sectional side view of a main part of a second conveyance line. (1) (2) (3)・-Transport line, (5)
- Drive shaft, (7) - Helical gear, (8) - Driven shaft, (10) - Helical gear, (17) (22)...
-Chain, (13)-・Main shaft, (28) -Kunisei shaft,
(29) - Bearing, (30) - Adjustment handle. Figure 1 Figure 2

Claims (1)

[Claims] (1) In a conveyance device that has a plurality of conveyance lines and each conveyance line is driven by the same drive mechanism via a power transmission mechanism such as a chain, the drive shaft for power transmission of the drive mechanism The driven shaft of the power transmission mechanism of the conveyance line driven by the drive shaft is disposed perpendicular to the driven shaft, and a helical gear is fixed to the drive shaft. The helical gear is slidably movable in the axial direction and is mounted so as to rotate together, and the helical gear of the driven shaft is moved in the axial direction by an appropriate reciprocating means to adjust the phase between the driving shaft and the driven shaft. 1. A method for adjusting the phase of a conveyance device, comprising shifting the phase of the conveyance line driven via the driven shaft, thereby changing the phase of the conveyance line driven through the driven shaft to match the timing with other conveyance lines.