JPS6333979B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is directed to a machining line in which the distances between each machining station are a common large pitch and a common small pitch, in which a plurality of workpieces are each moved by a single transfer bar. The present invention relates to a composite pitch conveying device in a processing line that transports pitches according to pitches.

(Prior art) Conventionally, when a workpiece is sequentially transferred to each processing station using a transport bar in a processing line having a plurality of processing stations, the processing stations are arranged at equal pitches, and the workpieces are held on the transport bar at the above-mentioned pitch. A receiving jig was provided and the transfer bar was moved in a rectangular manner to sequentially transfer the workpieces to each processing station (Utility Model No. 58-44151).
(see publication).

By the way, each processing station is installed at intervals determined by the maintenance of each processing unit, etc., and in the above-mentioned conventional apparatus, all processing stations are installed at the spacing required for the maintenance space of the processing unit.
Therefore, when the number of processing stations increases, the length of the processing line becomes longer and the installation space becomes larger. This becomes a particularly serious problem when setting up a new processing line in the limited space of an existing factory.

For this reason, it is possible to basically reduce the spacing between the machining stations by partially using a combined processing machine, but the overall spacing between the machining stations will vary between large pitches and small pitches. It is impossible to transport composite pitches with a small transport bar.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems of the conventional device, and is a composite processing system for a processing line that can sequentially transport workpieces to each station even when the intervals between the processing stations are large and small. The purpose is to provide a pitch transfer device.

(Structure of the Invention) In order to achieve the above object, the present invention has a machining line where the distance between each machining station is a common large pitch and a common small pitch, and each machining station is fixed at the same height. While providing a pedestal,
A feeding mechanism in which receiving jigs for the transport bar are provided at intervals of stations, and a receiving jig for transferring small pitches is provided lower than the receiving jig for transporting large pitches, and each of the receiving jigs for transporting bars is moved forward and backward and vertically. , an elevating mechanism, and a movable stopper for stopping the transport bar at a small pitch transfer position, and these mechanisms and stoppers are used to raise the transport bar to a full height, advance an intermediate stroke, lower the intermediate height, A control device is provided that allows the stepwise rectangular operation of advancing the remaining stroke, descending the remaining stroke, and retreating, thereby making it possible to sequentially transport the workpiece to the fixed pedestal of each of the above-mentioned processing stations at a common large pitch and small pitch. It is.

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

Figures 1 to 5 show an embodiment of the present invention, and in the figures, 1 is a processing line for processing workpieces while transferring them from the right side to the left side in Figure 1, and this line processes the workpieces sequentially. Processing unit 3
5, 7 to 10 are arranged on a straight line, and as shown in FIG. 1, the processing line 1 has a work stop station P consisting of a common large pitch L and small pitch S, and At the upstream end of the processing line 1, there is a work loader 2 that introduces workpieces into the processing line 1.
is arranged perpendicular to the processing line 1.

Each workpiece stopping station P has a processing fixed pedestal 1 for supporting the workpiece during processing.
1 (substantive processing station) or an idle fixed pedestal 12 that has the same height as this and supports the workpiece when it is idle. In addition, the first
In the figure, 6 is a workpiece direction changing machine.

Further, a conveyance bar 13 is arranged below the center of the processing line 1 and along this.
Reference numeral 3 denotes a rod-shaped body having approximately the same length as the processing line 1, and a receiving jig for placing a workpiece on the upper surface of the rod-shaped body is provided at a distance between the workpiece stopping stations P,
That is, the common large pitch L and the common small pitch S are also fixed. This receiving jig consists of a large pitch transfer receiving jig 14 and a small pitch transfer receiving jig 14 whose spacing between adjacent receiving jigs in the transfer direction (in the direction of the arrow in FIG. 2) is a large pitch L and a small pitch S, respectively. The height of the small pitch transfer receiving jig 15 is lower than that of the large pitch transfer receiving jig 14.

Further, a base 16 is arranged below the conveyance bar 13 at a predetermined interval, and an elevating arm 17 is rotatably attached to the upper part of the base 16, and a support roller is attached to the upper end of the arm 17. 18 or 18a
are rotatably mounted, and the rollers 18 and 18
The conveyance bar 13 is supported by a so as to be able to move up and down. Note that guide plates 18b are fixed to both side surfaces of the support roller 18a, and these are for preventing the conveyance bar 13 from moving in the left-right direction.

Connecting rollers 19 are rotatably attached to both sides of the front end of the conveyance bar 13, and each connecting roller 19 is connected to the left and right connecting recesses 20a of the connecting member 20.
The connecting member 20 is inserted into the connecting board 20 so as to be vertically movable and rotatable, and the connecting member 20 is fixed to the upper surface of the connecting board 21. Further, this connecting board 21 is a rectangular plate-like body, and sliding holes 21b are formed through the left and right sides thereof, and a guide rod 22 is inserted into the sliding hole 21b. It is fixed by a mounting bracket 24 to a cylinder frame 23 installed below the cylinder.

Further, a piston rod 25a of a feed hydraulic cylinder 25 is fixed to the front end surface of the connecting board 21, and this feed hydraulic cylinder 25 is connected to the transfer bar 1.
3 is fixed to the floor of a carry-out conveyor 37, which will be described later, below the extension line of 3, and this hydraulic cylinder 25 for feeding serves as an actuator for moving the conveyor bar 13 back and forth.

Further, 21c is a limit shoe fixed to the side surface of the connecting board 21, and 21d to 21f are limit switches, which are for detecting the position of the transport bar 13 in the front and back direction. This is to detect the backward position, intermediate position, and forward position of the And these limit shows 21
c, limit switches 21d to 21f, the above-mentioned feed hydraulic cylinder 25, connection board 21, connection member 2
0, a feed mechanism 40 for moving the conveyor bar back and forth is configured by a connecting roller 19 and a hydraulic unit (not shown).

Further, the lower end portion 17a of each lifting arm 17 is rotatably connected by an lifting rod 26,
The center of each lifting arm 17 is fixed to a rotating shaft 27, and the rotating shaft 27 is rotatably supported by a bracket 28 fixed to the base 16 or the cylinder frame 23. There is. A rotating lever 2 is attached to the rotating shaft 27 of the lifting arm 17 at the front end.
9 is fixed, and this is rotatably connected to the piston rod 30a of the lifting hydraulic cylinder 30, and this lifting hydraulic cylinder 30 is pivotally supported within the cylinder frame 23 by a rotating shaft 30b. The hydraulic cylinder 30 for lifting and lowering is the conveyor bar 1
3 is an actuator that moves it up and down. The lifting hydraulic cylinder 30, the rotating lever 29, the lifting arm 17, the lifting rod 26,
An elevating mechanism 41 for elevating and lowering the conveyor bar 13 is configured by support rollers 18, 18a and a hydraulic unit (not shown).

Further, a movable stopper 31 is disposed approximately in the center of the upper surface of the cylinder frame 23 so as to be slidable in a direction perpendicular to the processing line 1. This movable stopper 31 is a rod-shaped body having a notch 31a in the center;
A spline is formed on the right end portion 31b, and the left and right end portions 31b are supported by a support bracket 32 fixed to the upper surface of the cylinder frame 23 so as to be slidable in the left-right direction but non-rotatable.
Further, an L-shaped abutting member 33 having a width approximately 1/2 of the notch 31a of the movable stopper 31 is fixed, and a recess 31c is formed by the abutting member 33 and the notch 31a. The engaging member 21a fixed to the lower surface of the connecting board 21 can be inserted into the recess 31c. Furthermore, a piston rod 34a of a left-right moving cylinder 34 is screwed onto one end of the movable stopper 31, and the left-right moving cylinder 34 is fixed to the upper surface of the cylinder frame 23 by a support bracket 35.

Although not shown, this embodiment is provided with a control device that controls the operation of the conveyance bar 13. stoppa 31
The purpose is to operate by sequence control even with the trajectory shown in FIG. That is, this control device raises the conveyor bar 13 from the standby position A through the entire lifting stroke H, moves it forward by the intermediate forward stroke that is the small pitch S, and then reliably stops there, thereby completing the intermediate lowering stroke.
H ₁ is lowered, and the remaining forward stroke (L
-S), then lowered by the remaining lifting stroke _H2 , and finally retreated by the entire backward stroke, which is a large pitch L, to wait at the standby position A.

In addition, 37 is a carry-out device, which consists of a roller conveyor 37a and a chain conveyor 37b.
This chain conveyor 37b is used to transport the work to the outside of this composite pitch conveying device.

Next, the operation will be explained.

In a state where the workpiece 38 is placed on all the fixed pedestals 11 and 12, the adjacent fixed pedestals 11,
The case where the work 38 is transferred onto the 12 will be explained. In this case, the lifting hydraulic cylinder 30 is in an extended state, and each lifting arm 17 rotates counterclockwise in FIG. 1
3 is located at the lower position. Further, the feed hydraulic cylinder 25 is in an extended state, whereby the connecting board 21 is located at its retracted position and the transport bar 13 is retracted, so that the transport bar 13 is at its standby position A, that is, after the lower stage. Waiting at the end position. Furthermore, the horizontal movement cylinder 34
is in a contracted state, and the recess 31c of the movable stopper 31 is located on the same straight line as the engaging member 21a of the connecting board 21.

In this state, when the control device of the apparatus of this embodiment is started, the transfer operation is performed in the following order.

(i) First, the lifting hydraulic cylinder 30 is contracted to rotate the rotating lever 29 clockwise in FIG. 3.
Then, the lifting arm 17 at the front end fixed to the rotation shaft 27 rotates clockwise, and as the arm 17 at the front end rotates, the connecting rod 26
moves forward and rotates all the lifting arms 17, thereby all the supporting rollers 18, 18a
rotates to the raised position shown by the dashed line in Figure 2,
As a result, the conveyance bar 13 rises by the entire vertical stroke H and is located at the upper rear end position B. At this time, the connecting roller 19 at the front end of the transport bar 13 rises within the connecting recess 20a of the connecting member 20, and as the transport bar 13 rises, the workpiece is first placed on the large pitch transfer receiving jig 14. 38 is transferred, and then the workpiece 38 is transferred onto the small pitch transfer receiving jig 15.

(ii) When the transport bar 13 is located at the upper rear end position B, the feed hydraulic cylinder 25 contracts and the connecting board 2
1 to move forward. Then, the connecting roller 19 is pulled by the connecting member 20 of the connecting board 21, and the conveyance bar 13 moves forward. and the conveyance bar 1
3 moves forward by an intermediate forward stroke S, the limit switch 21c switches to the limit switch 21e.
is turned on, and in response to the on signal, the supply of hydraulic pressure to the feed hydraulic cylinder 25 is stopped, and the lateral movement cylinder 34 is extended to move the contact member 3
3 is located on the same straight line as the engaging member 21a of the connecting board 1, and its front end surface contacts the abutting member 33, and as a result, the conveying bar 13 is at the upper intermediate position C.
It will be stopped at . At this time, the small pitch transfer receiving jig 15 of the transfer bar 13 is located above each fixed pedestal 11 or 12 corresponding to small pitch transfer. At this time, the large pitch transfer receiving jig 14 is not located above the fixed pedestal.

(iii) Next, in this state, the elevating cylinder 30 is extended by approximately 1/2 stroke, and all the elevating arms 17 are rotated counterclockwise through an approximately 1/2 angle. Then, the conveyance bar 13 is lowered by an intermediate lifting stroke _H1 while the connecting roller 19 slides within the connecting recess 20a, and stops at the intermediate stop position D. During this process, the workpiece 38 on the small pitch transfer jig 15 is transferred onto the fixed pedestal 11 or 12. At this time, the workpiece 38 on the large pitch transfer receiving jig 14
has not been transferred yet.

(iv) When the conveyor bar 13 stops at the intermediate stop position D, the left-right cylinder 34 contracts and the movable stopper 3
1 recess 31c is the engaging member 2 of the connection board 1.
1a, and in this state, the feed hydraulic cylinder 25 is completely contracted. Then, the conveying bar 13 moves forward by the remaining forward stroke (LS) while the engaging member 21a moves within the recess 31c, and stops at the middle front end position E. At this time, the large-pitch transfer receiving jig 14 of the transfer bar 13 is located above each fixed pedestal 11 or 12 corresponding to large-pitch transfer.

(v) When the conveyor bar 13 stops at its middle front end position E, the lifting hydraulic cylinder 30 is fully extended and all the support rollers 18, 18a are rotated to their lower end positions. It descends by a lifting stroke _H2 and is located at the lower front end position F. During this process, the workpiece 38 on the large pitch transfer jig 14 is transferred onto the fixed pedestal 11 or 12.

(vi) When the transport bar 13 stops at its lower front end position F, the feed hydraulic cylinder 25 is fully extended, and the transport bar 13 is thereby moved to the engagement member 21a.
While moving within the recess 31c, the motor moves backward by the full backward stroke L and returns to its standby position A.

In this way, the work 38 is sequentially transferred onto the adjacent fixed pedestals 11 and 12, and each processing unit 3
-5, 7-10 are also processed, and finally they are carried out to the outside of the apparatus of this embodiment by the carrying-out device 37.

In this way, in the present embodiment, the large pitch transfer receiving jig 14 is disposed on the transfer bar 13 with a large pitch L, and the small pitch transfer receiving jig 15, which is lower in height, is disposed with a small pitch S. Since the transfer bar 13 is operated so as to draw a stepped rectangular locus as shown in FIG. 6, the workpiece 38 can be transferred with a large pitch L and a small pitch S with a very simple structure, and the length of the processing line can be shortened. can do.

Also, actuator (hydraulic cylinder for feeding) 2
5, a movable stopper 31 is provided so as to be freely retractable;
By bringing this movable stopper 31 into contact with the part (engaging member) 21a that moves together with the actuator 25, an intermediate stop of small pitch transfer is performed. Accurate intermediate stops can be performed.

In the above embodiment, the work stop station P is equipped with a processing fixed pedestal 11 and an idle fixed pedestal 1.
2 is provided, but in the present invention, the idle fixed pedestal 12 is not necessarily necessary, and if this idle fixed pedestal is not provided, the distance between the processing fixed pedestals 11 may be increased. Pitzchi L
and a small pitch S.

Furthermore, in the above embodiment, a case was explained in which a processing station was provided for two pitches, large pitch L and small pitch S, but the processing station could be provided not only for two pitches but also for three or more pitches. For example, when a processing station is provided with three pitches, the receiving jig for the conveyance bar 13 may be formed at each of the three heights, and the conveyance bar may be operated in a three-step rectangular shape.

(Effects of the Invention) As described above, according to the composite pitch conveying device for a machining line according to the present invention, in a machining line where the distances between the machining stations are a common large pitch and a common small pitch, the conveyor bar can be used for each machining process. A receiving jig is provided at intervals between the stations, and the receiving jig for small pitch transfer is set lower than the receiving jig for large pitch transfer. Since the machine is operated by drawing a stair-step rectangular locus, the workpiece can be conveyed in a compound pitch of large pitches and small pitches with a simple structure, and the length of the processing line can be shortened.

Moreover, since the conveyance bar or the moving part related to it comes into contact with the movable stopper,
Since the stop position of the small pitch transfer is accurately determined, each processing station, which is the actual stopping point, can be stopped with high positioning accuracy.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram of a composite pitch conveying device in a processing line according to an embodiment of the present invention, FIG. 2 is a side view of its conveying bar, FIG. 3 is a side view of its feeding mechanism and lifting mechanism, and FIG. 5 is a front view of the movable stopper portion, and FIG. 6 is a diagram for explaining its operation. 1... Processing line, 11, 12... Fixed pedestal,
13... Transfer bar, 14... Large pitch transfer receiving jig, 15... Small pitch transfer receiving jig, 21a...
Portion related to the transport bar (engaging member), 25...
Actuator (hydraulic cylinder for feeding), 30...
...actuator (hydraulic cylinder for lifting and lowering), 31
...Movable stopper, 40...Feeding mechanism, 41...
Lifting mechanism, P...work stopping station.

Claims (1)

[Claims] 1. In a processing line that has multiple processing stations and the distance between each processing station is a common large pitch and a common small pitch, the workpiece is lifted by a conveyor bar and placed at the same height at each processing station. It is a device for transferring to a fixed pedestal, in which receiving jigs are provided at intervals between each processing station on the transfer bar, and the receiving jigs are transferred at a small pitch compared to the height of the receiving jigs that are transferred at the above-mentioned large pitch. The tool is set low, and a feeding mechanism including an actuator that moves the transfer bar back and forth with a large stroke, a lifting mechanism including an actuator that moves the transfer bar up and down, and a transfer bar or related thereto while the transfer bar is moving forward. A retractable movable stopper is provided that comes into contact with the moving part and determines the stop position for small pitch transfer, and further stops the transfer bar once during the small pitch stroke during its forward movement, and then stops the transfer bar during its downward movement. The feed mechanism, lifting mechanism, and movable stopper are operated and controlled so that the conveyance bar is temporarily stopped at an intermediate position of the entire downward stroke, and then the conveyance bar is advanced by the remaining forward stroke, and then the conveyance bar is lowered to the lowest position. 1. A compound pitch conveying device in a processing line, characterized in that a control device for controlling the pitch is provided.