JPH0314577B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a workpiece changing method and device for a printed circuit board drilling machine, and particularly to a printed circuit board that can shorten workpiece changing time and save floor space. The present invention relates to a workpiece changing method for a hole punching machine and its device.

(Prior art) Conventionally, in a processing machine that drills a large number of through holes in a printed circuit board, a workpiece that has been stored in a predetermined position is taken out and set in the processing position, and after processing, the workpiece is taken out and placed in the specified position. A workpiece exchange device for a printed circuit board hole punching machine that is housed in the position is generally known.

However, with this type of conventional workpiece exchange device,
Since a worker manually takes out the processed workpiece on the work table of the printed circuit board hole punching machine, there are disadvantages of poor work efficiency and increased labor costs.

Therefore, as shown in Japanese Patent Application Laid-open No. 59-156644, for example, some machines are equipped with a large number of pallets on which several sets of workpieces can be placed, and these pallets are stacked so that they can be pulled out and then built into storage cabinets that can be raised and lowered. When drilling holes, the pallet is pulled out from the storage to the loading position using a drawer device connected to the hole puncher, and each workpiece on the pallet is lifted up by the loading device installed on the drawer. The workpiece is transferred to the work table of the drilling machine and set at the workpiece setting position. After processing, the workpiece is lifted by the loading device and returned to the loading position, and the workpiece is placed on the pallet. At the same time, the drawing device is returned. A system has been proposed in which the pallets are stored in the storage and then moved up and down one step.

This type of device does not require manual effort to take out processed workpieces from the worktable, so compared to conventional workpiece exchange devices, it is possible to significantly improve work efficiency and reduce costs.

However, the machined workpiece is taken out from the worktable and returned to the pallet, the pallet is stored in the storage area, the pallet is moved up and down one step, and the pallet on which the unprocessed workpiece is placed is placed in the storage area. The printed circuit board hole punching machine does not perform any machining operations until it pulls out the unprocessed workpiece from the workpiece and sets the unprocessed workpiece on the worktable, and this period results in loss time, and even though workpiece replacement has been automated, it is insufficient. There is a problem in that it cannot be expected to improve work efficiency. In particular, since it is customary to drill holes in printed circuit boards in succession on a large number of printed circuit boards, the total amount of lost time that occurs for each hole drilling process is significant, and in practice this is not possible. cannot be ignored.

(Purpose of the Invention) The present invention has been made in view of the current situation, and is a workpiece of a printed circuit board drilling machine that can virtually eliminate the loss time that occurs when replacing a workpiece, and can save floor space. The purpose is to provide a replacement method and device.

(Summary of the Invention) The present invention provides a workpiece loading/unloading device which is provided with a plurality of workpiece mounting portions in the axial direction on an upper surface and a lower surface thereof, and is capable of rotating around an axis to reverse the upper and lower workpiece mounting portions; A workpiece transfer device that reciprocates between the workpiece loading/unloading device and the workpiece storage section to transfer workpieces between the two is used to set unprocessed workpieces in the upper workpiece loading section and to load and unload the lower workpieces. Grasp the machined workpiece on the worktable at the section and turn the workpiece loading/unloading device over.
The unprocessed workpiece that has been moved from the top side to the bottom side is set on the work table and processed.
During this machining, the processed workpiece that has been moved from the bottom side to the top side is returned to the workpiece storage section, and the unprocessed workpiece is set from the workpiece storage section to the workpiece loading/unloading device. It is characterized by being able to reduce loss time to virtually zero.

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

FIG. 1 is a plan view showing an example of a workpiece exchange device according to the present invention, and FIG. 2 is a similar front view. Work storage device 3
and a workpiece transfer device 4 that reciprocates between the workpiece loading/unloading device 2 and the workpiece storage device 3 to deliver and receive the workpiece, and the workpiece transfer device 4
The unprocessed workpiece taken out from the workpiece storage device 3 is set on the worktable 6 of the printed circuit board hole punching machine 5 via the workpiece loading/unloading device 2, and is subjected to hole punching while being set on the worktable 6. The processed workpiece is taken out from the worktable 6 by the workpiece loading/unloading device 2, transported by the transporting device 4, and returned to the workpiece storage device 3 again.

As shown in FIGS. 1, 3, and 4, the workpiece attachment/detachment device 2 has six workpiece attachment portions 7a and 7b in the axial direction on the upper and lower surfaces, respectively, and both of these workpieces can be attached. Mounting parts 7a, 7b
is rotated around the central axis by the rotating device 8 shown in Figure 1.
It is designed to be rotated intermittently by 180 degrees, and also to move horizontally and upwardly at required timings by means of a slide elevating device 9. These will be detailed later.

Both the upper and lower workpiece mounting portions 7a, 7b have a third
As shown in FIG. 4 and FIG.
It is equipped with fixed claws 11a and 11b that grip the assembled workpiece 10 from both sides in the figure, and both movable claws 12.
a and 12b are screwed onto a drive screw 13 having mutually threaded threads at both ends so that they slide by the same amount in opposite directions, and resist the biasing force of springs 14a and 14b. It is designed so that a constant workpiece clamping force can be obtained by making slight movements.
As shown in FIGS. 3 and 4, a sprocket 15 is pivotally attached to one end of the drive screw 13, and the sprocket 15 is driven to rotate in forward and reverse directions by a drive motor (not shown). .
Therefore, both the upper and lower workpiece mounting parts 7a and 7b are
By rotating the drive screw 13 in the forward and reverse directions, the workpiece 10 is simultaneously gripped and released.

On the other hand, as shown in FIGS. 1 and 2, the workpiece storage device 3 stores a large number of sets of workpieces 10 in the vertical direction, and includes a workpiece stocker 16 having wheels 16a on the lower surface, and a workpiece stocker 16 that is connected to a rail 17.
The work stocker 16 is provided with a transport mechanism 18 that transports the work stocker 16 along a predetermined stop position, and a vertical movement mechanism 19 that moves the work stocker 16 up and down by a required amount at a time when the work stocker 16 is stopped at a predetermined stop position.

As shown in FIG. 2, the workpiece stocker 16 has a large number of storage shelves 16b that can store the workpieces 10 in sets in the vertical direction, and each storage shelf 16b is connected to a workpiece transport device, which will be described later. 4
grips the workpiece 10 owned by the workpiece transfer device 4.
At least the upper side and the right side in FIG. 1 are open so that the workpiece 10 can be taken out of the workpiece stocker 16 and stored in the workpiece stocker 16 by horizontally moving the workpiece 10 .

Further, as shown in FIGS. 1 and 2, the conveyance mechanism 18 includes a sprocket support member 18a, a sprocket drive machine 18b, and a drive chain 18c stretched endlessly between them. The drive chain 1 is mounted on the lower surface of the chain 16 by manually moving it on the rail 17 to the standby position indicated by reference numeral 16' in FIG.
A meshing member 16c that meshes with the shaft 8c is fixedly provided. This meshing member 16c and the drive chain 1
8c, the workpiece stocker 16 is thereafter transported by the transport mechanism and temporarily stopped at the stop position shown by the solid line in FIG. It is designed to be conveyed to a discharge position indicated by 16''.

Further, as shown in FIGS. 1 and 2, the vertical movement mechanism 19 includes two pawls 19a disposed by cutting out a part of the rail 17, and the pawls 19a are moved up and down intermittently with a fixed dimension. In the normal state, that is, when the workpiece stocker 16 is transported on the rail 17, the upper surface of the claw 19a touches the rail 17 as shown by the chain line in FIG. The notch part of the rail 17 is flush with the top surface, so that the notch part of the rail 17 is flush with the top surface.
9a, so as not to cause any trouble in transporting the workpiece stocker 16. Then, after the workpiece stocker 16 is conveyed to the stop position shown by the solid line in FIG. 1 and stopped, the both claws 19a
rises to the position shown by the solid line in FIG. 2 and is connected and locked to the lower surface of the work stocker 16, and thereafter moves up and down intermittently to move the work stocker 16 up to the highest position shown by the chain line in FIG. It's summery.

The workpiece transfer device 4 includes a workpiece gripping mechanism 21 that reciprocates on a guide rail 20 that extends along the workpiece attachment/detachment device 2 to a position just in front of the rail 17, as shown in FIGS. 1 and 3. The workpiece gripping mechanism 21 is provided with a drive machine 22 for reciprocating the workpiece gripping mechanism 21 along the guide rail 20, and a back-and-forth motion motive 23 for sliding the workpiece gripping mechanism 21 in the left-right direction in FIG. It is being

As shown in FIG.
It is equipped with a fixed claw 25 fixed to the fixed claw 25 and a movable claw 27 pivoted to the fixed claw 25 via a fulcrum 26 so as to be able to open and close vertically.The movable claw 27 is always kept closed by a spring (not shown). It is biased, and is opened by operating a solenoid 28 attached to the fixed arm 24 against the biasing force of the spring.

Further, a fluid pressure cylinder 30 having a block 29 with a groove 29a at the tip is installed diagonally downward on the upper part of the fixed arm 24 as shown in FIG. 10 is set on the workpiece attaching/detaching device 2, the hydraulic cylinder 30 is extended and the locating pin 10b on the right end side in the figure is inserted into the groove 29a of the block 29, and the axial position of the workpiece 10 is adjusted. That is, the position in the front and back directions in FIG. 4 is uniquely determined.

On the other hand, the work table 6 of the printed circuit board hole punching machine 5 is provided with six work fixing parts 6a that correspond to the work mounting parts 7a and 7b of the work mounting/detaching device 2, as shown in FIG. , each workpiece fixing portion 6a is provided with a hole 31 into which the locate pin 10b at one end of the workpiece 10 is inserted, and a pinching mechanism 32 that clamps and fixes the locate pin 10b at the other end from both sides, and the pinching mechanism 32 includes: The hole 31 is formed to be elongated toward the hole 31 so as to accommodate the size difference of the workpiece 10. This work table 6 has a structure that allows it to slide a required amount toward the workpiece loading/unloading device 2 by known means.

Next, a method for exchanging the workpiece 10 will be explained. When replacing the workpieces, first, the workpiece stocker 16 full of unprocessed workpieces 10 is transported by the transport mechanism 18 shown in FIG. 1 to a stop position shown by a solid line in the figure, and is stopped at that position.

Next, the work transfer device 4 is moved along the guide rail 20 by the drive device 22 from the position shown by the solid line in FIG. 1 to the position shown by the chain line.

Then, the workpiece gripping mechanism 21 moves to the guide rail 2
The upper and lower positions of both claws 25 and 27 correspond to the uppermost storage shelf 16b of the workpiece stocker 16.

Therefore, by activating the solenoid 28, the movable claw 2
7 is opened, the back-and-forth motion motive 23 is activated to move the workpiece gripping mechanism 21 forward toward the workpiece stocker 16, and then the power to the solenoid 28 is cut off and the ends of the workpiece 10 are gripped from above and below with both claws 25 and 27. to hold.

Next, the back-and-forth motion motive device 23 is activated to move the workpiece gripping mechanism 21 back to its original position, and the drive device 22 is activated to move the workpiece transfer device 4 to the position shown by the solid line in FIG. 1. As a result, the workpiece 0 held by the workpiece transport device 4 corresponds to the workpiece mounting portion 7a at the right end in the figure.

Next, the back-and-forth motion motive unit 23 is activated to move the workpiece gripping mechanism 21 forward to the position shown in FIG.
The workpiece 10 is opened and set on the workpiece mounting portion 7a as shown in FIG. 4, and then the fluid pressure cylinder 30 is extended to position the workpiece 10. After positioning, the fluid pressure cylinder 30 is contracted, and the workpiece gripping mechanism 21 is moved back to its original position by the back-and-forth motion motor 23.

Next, the vertical movement mechanism 19 is operated to raise the workpiece stocker 16 by one level of the storage shelf 16b, and the workpiece transport device 4 is moved to the workpiece stocker 16 side to move it to the second storage shelf 16b from the top.
The workpiece 10 stored in the workpiece gripping mechanism 2
Grip with 1. Then, by the same method as described above, this is placed in the second workpiece mounting section 7a from the right end in FIG.
and positioning is performed using the fluid pressure cylinder 30. This operation is performed sequentially to set all the workpieces 10 on the six workpiece mounting portions 7a on the upper surface side.

The operations described above are performed while the printed circuit board hole punching machine 5 is drilling holes.

When the hole drilling process by the printed circuit board hole drilling machine 5 is completed, the work table 6 on which the processed workpiece 10 is set is horizontally moved toward the workpiece loading/unloading device 2 side, and the slide lifting device 9
is activated to horizontally move the workpiece attachment/detachment device 2 to the work table 6 side, so that the worktable 6 and the workpiece attachment/detachment device 2 are aligned vertically.

Next, as shown in FIG. 5a, the slide lifting device 9 is operated to lower the workpiece loading/unloading device 2.
Rotate the drive screw 13 to attach the workpiece mounting section 7 on the lower surface.
Processed workpiece 1 on work table 6 by b
Grasp 0. At the same time, the unprocessed workpiece 10 set on the workpiece mounting section 7a on the upper surface is gripped by the workpiece mounting section 7a.

In this state, the workpiece loading/unloading device 2 is raised by operating the slide lifting device 9 as shown in FIG. 5b, and the workpiece loading/unloading device 2 and the work table 6 are moved up as shown in FIG. The workpiece loading/unloading device 2 is moved horizontally to the position shown by , and the workpiece loading/unloading device 2 is raised by the slide lifting device 9. Thereafter, as shown in FIG. 5d, the rotating device 8 is operated to rotate the workpiece loading/unloading device 2 by 180 degrees around the central axis 0. As a result, the processed workpiece 10 comes to the upper side, and the unprocessed workpiece 10 comes to the lower side.

Next, the workpiece loading/unloading device 2 is lowered by the slide lifting device 9 to the position shown in FIG. so that they are facing each other vertically. Thereafter, as shown in FIG. 5F, the workpiece loading/unloading device 2 is lowered by the slide lifting device 9, and the unprocessed workpiece 10 held by the workpiece mounting portion 7a located on the lower surface is set on the worktable 6. In this setting, first open the pinching mechanism 32 of each work fixing part 6a of the work table 6, and in this state lower the workpiece attachment/detachment device 2 to fit both locating pins 10b of the workpiece 10 into the hole 31 and the pinching mechanism 32. , then close the pinch mechanism 32 and locate the pin 10.
This is done by holding b.

After setting the unprocessed workpiece 10 on the worktable 6, the drive screw 13 is driven to release the gripping of the workpiece 10 by the workpiece mounting parts 7a and 7b, and the workpiece attachment/detachment device 2 is activated as shown in FIG. 5g. raise. As a result, the unprocessed work 10 held by the work mounting section 7a is transferred to the work table 6.

Next, as shown in FIG.
is processed by the printed circuit board hole punching machine 5, and during this processing, the workpiece loading/unloading device 2 is raised to store the processed workpiece 10 set in the workpiece mounting section 7b in the workpiece stocker 16 and to remove the workpiece. Unprocessed workpiece 1 in Totsuka 16
0 to the work mounting section 7b.

That is, once machining of the unprocessed workpiece 10 by the printed circuit board hole punching machine 5 is started,
First, the workpiece attachment/detachment device 2 is raised to position the processed workpiece 10 set in the workpiece attachment section 7b in the upper and lower positions between the claws 25 and 27 of the workpiece gripping mechanism 21.

Next, the back-and-forth motion motive device 23 is activated to advance the workpiece gripping mechanism 21, and the solenoid 28 is activated to activate the workpiece gripping mechanism 21 to grip the workpiece 10. At this time, normally the workpiece mounting section 7b is open and the processed workpiece 10 is simply placed on the workpiece mounting section 7b, but both claws 1b and 12b of the workpiece mounting section 7b are
While gripping the workpiece 10, the workpiece gripping mechanism 2
1 grips the workpiece 10, and after gripping, both the claws 11
The grip by b and 12b may be released.

Once the processed workpiece 10 is gripped by the workpiece gripping mechanism 21, the workpiece loading/unloading device 2 is lowered and the workpiece gripping mechanism 21 is moved to the workpiece stocker 1.
6 side and store it in the required storage shelf 16b of the work stocker 16. This operation is performed sequentially for each of the six workpiece mounting portions 7b.

Once all processed workpieces 10 on each workpiece mounting section 7b are stored in the workpiece stocker 16,
An unprocessed workpiece 10 is taken out from the workpiece stocker 16 by a workpiece gripping mechanism 21 and set in each workpiece mounting section 7 one after another. At this time, if there is no unprocessed workpiece 10 in the workpiece stocker 16, that is, if the workpiece stocker 16 is filled with processed workpieces 10, the transport mechanism 18 shown in FIG. 16". While transporting the work stocker 16 to the ejection position,
Work is performed by moving the workpiece stocker 16, which is in the standby position indicated by 6', to the solid line position.

Therefore, during processing of the workpiece 10, the processed workpiece 10 is stored in the workpiece stocker 16 and the unprocessed workpiece 10 is set in the workpiece loading/unloading device 2, so that the workpiece 10 can be replaced. The time can be significantly reduced.

In addition, processed workpiece 10 and unprocessed workpiece 1
Since the workpiece attachment/detachment device 2 is rotated around the central axis 0 to replace the workpiece with 0, the device can be configured in a narrow floor space.

In addition, in the embodiment described above, as shown in FIGS. 5a to 5h, the workpiece loading/unloading device 2 is moved vertically and horizontally many times to perform workpiece exchange. 6, or depending on the configuration of the work transfer device 4, it may be sufficient to simply move the workpiece loading/unloading device 2 up and down, or there may be cases where horizontal movement and vertical movement are not required at all.

(Effects of the Invention) As explained above, the present invention provides a workpiece in which a plurality of workpiece mounting portions are provided in the upper and lower surfaces in the axial direction, and the upper and lower workpiece mounting portions can be rotated around the axis. Using a loading/unloading device and a workpiece transfer device that reciprocates between the workpiece loading/unloading device and the work storage section to transfer the workpiece between the two, an unprocessed workpiece is set in the upper workpiece loading section, and The lower workpiece mounting section grasps the processed workpiece on the worktable, the workpiece loading/unloading device is reversed, and the unprocessed workpiece, which has been moved from the upper side to the lower side, is set on the worktable and processed. During this processing, the processed workpiece that has been moved from the lower surface side to the upper surface side is returned to the workpiece storage section, and the unprocessed workpiece is set from the workpiece storage section to the workpiece loading/unloading device. Lost time during workpiece replacement can be significantly reduced to virtually zero.

In addition, since the workpieces are replaced by rotating the workpiece loading/unloading device around its axis, the workpieces can be replaced in one operation regardless of the number of workpieces attached, resulting in high work efficiency and a compact device configuration. This allows you to save floor space.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a workpiece exchange device according to the present invention, FIG. 2 is a similar front view, FIG. 3 is a detailed view showing the relationship between the workpiece loading/unloading device and the workpiece conveyance device, and FIG. Detailed views showing the relationship between the workpiece loading/unloading device and the worktable, and FIGS. 5A to 5H are explanatory diagrams sequentially showing the workpiece exchange method according to the procedure. 1; Workpiece exchange device; 2; Workpiece attachment/detachment device;
3; Workpiece storage device, 4; Workpiece transfer device, 5;
Printed circuit board hole punching machine, 6; Work table, 7a, 7b; Work mounting section, 8; Rotating device,
9; Slide lifting device, 10; Work, 16, 1
6', 16''; Work stocker, 18; Conveyance mechanism,
19; Vertical movement mechanism, 20; Guide rail, 21;
Work gripping mechanism, 22; Drive machine, 23; Back-and-forth motion motive, 0; Central axis.

Claims (1)

[Scope of Claims] 1. A workpiece attachment/detachment device which is provided with a plurality of workpiece attachment portions in the axial direction on an upper surface and a lower surface thereof and is capable of rotating around an axis to invert the upper and lower workpiece attachment portions, and this workpiece attachment/detachment device. A workpiece transport device that reciprocates between the device and the workpiece storage section, takes out unprocessed workpieces from the workpiece storage section and sets them in the workpiece loading/unloading device, and also takes processed workpieces out of the workpiece loading/unloading device and returns them to the workpiece storage section. The machined work piece on the work table of the printed circuit board drilling machine is gripped by the lower work piece mounting part of the workpiece loading/unloading device, in which the unprocessed workpiece is set in the upper work piece mounting part, and then The unprocessed workpiece is set on the work table by rotating the workpiece mounting device around its axis, and while the unprocessed workpiece is being processed by the printed circuit board hole punching machine, the upper workpiece is placed by the workpiece transfer device. A printed circuit board hole drilling machine characterized by sequentially returning a processed work set in a mounting section to a work storage section and setting an unprocessed work in the work storage section above the work mounting section. workpiece exchange method. 2. A workpiece attachment/detachment device which is provided with a plurality of workpiece attachment portions in the axial direction on the upper and lower surfaces thereof and is capable of rotating around the axis to invert the upper and lower workpiece attachment portions, and the workpiece attachment/detachment device and the workpiece storage portion. The machine reciprocates between the workpieces, takes out the processed workpiece set in the upper workpiece mounting part, and returns it to the workpiece storage part, and sets the unprocessed workpiece in the workpiece storage part in the now empty upper workpiece mounting part. The machine is equipped with a workpiece conveyance device, which grips the processed workpiece on the worktable of the printed circuit board drilling machine with the lower workpiece mounting section, and also reverses the workpiece loading/unloading device to transfer the unprocessed workpiece onto the worktable. A workpiece changing device for a printed circuit board hole drilling machine, which is characterized by the following: