JPS61284354A - Method and device for work replacement in a printed circuit board boring machine - Google Patents

Abstract

PURPOSE:To nullify the loss time due to work replacement substantially by furnishing a work placing part at the oversurface and undersurface, by equipping each of them with a work fitting device with possibility of turnover and by setting a processed and an unprocessed work on these device during processing. CONSTITUTION:An unprocessed work is set on a work fitting part at the oversurface of a work fitting/removing device 2 while a processed work on a work table 6 is grasped by a work fitting part at the undersurface of the same, and said fitting/removing device 2 is inverted by a rotational device 8. The unprocessed work transferred from the oversurface to undersurface is set on said work table 6 for performance of specified processing and meantime the processed work transferred from the undersurface to oversurface is returned to a work accommodation device 3 and unprocessed work from the work accommodation device 3 is set on the abovementioned work fitting/ removing device 2. This should reduce the loss time likely otherwise at the time of work replacement down substantially to zero.

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 at the processing position, and after processing, the workpiece is taken out and placed in the predetermined 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 changing device, the worker manually takes out the processed workpiece on the worktable of the printed circuit board hole punching machine, which has the disadvantage of poor work efficiency and increased labor costs. There is.

Therefore, as shown in Japanese Patent Laid-Open No. 59-156644, for example, there are many pallets on which several sets of workpieces can be placed, and these pallets are stacked so that they can be pulled out and stored in storage cabinets that can be raised and lowered. When processing the perforators, the pallet is pulled out from the storage to the loading position using a pull-out device connected to the processing machine.
Each workpiece on the pallet is lifted by the loading device installed on the pull-out device, and for drilling, the workpiece is transferred to the work table of the processing machine and set at the workpiece setting position.After processing, the workpiece is lifted by the loading device and placed at the loading position. It has been proposed that the pallet is moved up and down one step after the pallet is returned to the pallet and the workpiece is placed on the pallet, and the pull-out device is returned to store the pallet in the storage.

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

However, the processed work is taken out from the work table and returned to the pallet, the pallet is stored in the storage, the pallet is moved up and down one step, and the pallet on which the unprocessed work is placed is placed in the storage. The printed circuit board hole punching machine does not perform any machining operations until the unprocessed workpiece is set on the worktable after it is pulled out from the workpiece. There is a problem that improvement in work efficiency cannot be expected. In particular, it is customary to drill holes in printed circuit boards in succession on a large number of printed circuit boards, so the total loss time that occurs each time a single hole is drilled becomes significant, making it practical for practical use. Above this 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 that is provided with a plurality of workpiece mounting sections in the axial direction on the upper surface and the lower surface thereof, and is capable of rotating around the axis to reverse the upper and lower workpiece mounting sections; Using a workpiece transfer device that reciprocates between the loading/unloading device and the workpiece storage section to transfer the workpieces between the two, an unprocessed workpiece is set in the upper workpiece mounting section, and
The lower workpiece mounting section grips the processed workpiece on the worktable, the workpiece loading/unloading device is reversed, and the unprocessed workpiece that has been moved from the top side to the bottom side is set on the worktable and processed. During this machining, 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. It is characterized by being able to reduce the loss time to virtually zero.

(Example 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. The workpiece storage device 3 is provided with a workpiece 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. The unprocessed workpiece taken out from the workpiece is set on the worktable 6 of the printed circuit board hole punching machine 5 via the workpiece attachment/detachment device 2, and the flower bud is processed while it is set on the worktable 6. The work is taken out from the work table 6 by the work loading/unloading device 2, transported by the work transport device 4, and returned to the work storage device 3 again.

As shown in FIG. 1, FIG. 3, and FIG. 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. The parts 7a and 7b are intermittently rotated by 180 degrees around a central axis O by a rotation device 8 shown in FIG.

A slide lifting device 9 allows horizontal movement and vertical movement at required timing. These will be detailed later.

The upper and lower workpiece mounting sections 7a and 7b grip a workpiece 10, which is made up of a set of three printed circuit boards 10a connected by locating pins 10b, from both sides in the figure, as shown in FIGS. 3 and 4. Fixed claws 11a and llb are provided, and both movable claws 12a and 12b are screwed onto a drive screw 13 having threaded portions with mutually opposite threads at both ends so as to slide in opposite directions by the same amount. At the same time, it moves slightly against the biasing force of the springs 14a and 14b, so that a constant workpiece clamping force can be obtained. 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). . Thus, both the upper and lower workpiece mounting parts 7a, 7b simultaneously grip and release the workpiece 10 by rotating the drive screw 13 in the forward and reverse directions.

On the other hand, the work storage device 3 stores a large number of sets of works 10 in the vertical direction as shown in FIGS. Conveying mechanism 1
8, and a vertical movement mechanism 19 for vertically moving the work stocker 16 stopped at a predetermined stop position by a required amount.

As shown in FIG. 2, the work 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 has
The workpiece 10 can be moved by simply gripping a workpiece 10 owned by the workpiece conveyance device 4 (described later) and horizontally moving the workpiece conveyance device 4.
At least the upper end side and right end side in FIG. 1 are open so that the workpiece can be taken out from the workpiece stocker 16 and stored in the workpiece stocker 16.

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. A meshing member 16c is fixed on the lower surface of the tocker 16 and engages with the drive chain 18c by manually moving it on the rail F to a standby position indicated by reference numeral 16' in FIG.

Due to the meshing of the meshing member 16c and the drive chain 18c, the work stocker 16 is subsequently moved to the transport mechanism 18.
It is conveyed by , and is temporarily stopped at the stop position shown by the solid line in FIG. 1.

Further, after all of the stored workpieces 10 have been processed, they are transported to a discharge position indicated by reference numeral 16'' in FIG.

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. The claw 19a is in a normal state, that is, when the work stocker 16 is on the rail 17.
When being transported on the top, its top surface is flush with the top surface of the rail 17, as shown by the chain line in FIG. This is designed to avoid any hindrance to the transportation of the work stocker 16. And the work stocker 16 is
After being conveyed to the stop position shown by the solid line in FIG. 1 and stopped, the claws 19a rise to the position shown by the solid line in FIG. The work stocker 16 is moved up and down to the highest position shown by the chain line in FIG.

The workpiece conveyance device 4 includes a workpiece gripping mechanism 21 that reciprocates on a guide rail 20 extending along the workpiece attachment/detachment device 2 to a position just in front of the rail 17, as shown in FIGS. 1 and 3. This work gripping mechanism 2
1 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 mower 23 for sliding the workpiece gripping mechanism 21 in the left-right direction in FIG.

As shown in FIG. 3, the workpiece gripping mechanism 21 includes a fixed pawl 25 fixedly attached to a fixed arm 24 mounted on a back-and-forth motion motive device 23, and a pivot on the fixed pawl 25 that can be opened and closed vertically via a fulcrum 26. The movable claw 27 is always biased toward the closing side by a spring (not shown), and also resists the biasing force of the spring by the operation of a solenoid 28 attached to the fixed arm 24. It is designed to open and operate.

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 fluid pressure cylinder 30 is operated to extend, so that the locate 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 drilling 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 has a hole 3 into which a locate pin 10b at one end of the workpiece 10 is inserted.
1 and the other end of the locating pin 10b are provided respectively, and the pinching mechanisms 32 are formed to be elongated toward the hole 31 so as to accommodate the dimensional 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 guide rail 2 is moved by the drive device 22 from the position shown by the solid line in FIG. 1 to the position shown by the chain line in FIG.
Move along 0.

Then, the workpiece gripping mechanism 21 is in a state of protruding from the end of the guide rail 20 toward the rail 17 side, and both claws 2
The vertical position of 5.27 corresponds to the uppermost storage W16b of the work stocker 16.

Therefore, the solenoid 28 is actuated to open the movable claw 27, and the back-and-forth motion motive 23 is actuated to move the workpiece gripping mechanism 21 forward toward the workpiece stocker 16. Thereafter, the power supply to the solenoid 28 is cut off, and the movable claws 25. 27 clamps the ends of the workpiece 10 from above and below.

Next, the back-and-forth movement motive machine 23 is operated to move the workpiece gripping mechanism 21 back to its original position, and the drive machine 22
is activated to move the workpiece conveyance device 4 to the position shown by the solid line in FIG. As a result, the workpiece 10 held by the workpiece transport device 4 corresponds to the workpiece mounting section 7a at the right end in the figure.

Next, the back-and-forth movement movator 23 is activated to advance the workpiece gripping mechanism 21 to the position shown in FIG. 3, and the solenoid 28 is activated to open the movable claw 27 to move the workpiece 10 to the workpiece mounting portion as shown in FIG. 7a, and then the fluid pressure cylinder 30 is extended to position the work lO. 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 move the work stocker 1.
6 is raised by one level of the storage shelf 16b, and the workpiece transport device 4 is moved to the workpiece stocker 16 side to move the workpiece 10 stored in the second storage shelf 16b from the top.
is gripped by the workpiece gripping mechanism 21. Then, this is set in the second work mounting section 7a from the right end in FIG. 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 printed circuit board hole punching machine 5 finishes drilling, the work table 6 on which the processed workpiece 10 is set is moved horizontally to the workpiece loading/unloading device 2 side, and the slide lifting device 9 is activated. Then, the workpiece attachment/detachment device 2 is horizontally moved toward the work table 6 side, and the worktable 6 and the workpiece attachment/detachment device 2 are made to correspond vertically.

Next, as shown in FIG. 5(a), the slide lifting device 9
is activated to lower the workpiece loading/unloading device 2, and the drive screw 1 is lowered.
3 is rotated and the processed work 10 on the work table 6 is gripped by the lower work mounting portion 7b. Then.

At the same time, the unprocessed workpiece 10 set in the upper workpiece mounting section 7a 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. 5(b), and the workpiece loading/unloading device 2 and the work table 6 are moved up as shown in FIG. 5(c). Move the workpiece loading/unloading device 2 horizontally to the position shown by the solid line in Figure 1, and then move the workpiece loading/unloading device 2 to the slide lifting device 9.
Increase by Thereafter, as shown in FIG. 5(d), the rotation device 8 is operated to rotate the workpiece attachment/detachment 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 1
0 is at the bottom.

Next, the workpiece loading/unloading device 2 is lowered by the slide lifting device 9 to the position shown in FIG. 5(c), and the fifth
As shown in FIG. 5(e), the workpiece loading/unloading device 2 and the worktable 6 are horizontally moved in the direction toward each other so that they face each other vertically 6. Then, as shown in FIG. The work mounting device M2 is lowered by the device 9, and the unprocessed work 10 held by the work mounting section 7a located at the lower side is set on the work table 6. In this set, first open the clamping mechanism 32 of each workpiece fixing part 6a of the worktable 6, and in this state lower the workpiece attachment/detachment device 2 to fit the double-ended cage pin 10b of the workpiece 10 into the hole 31 and the clamping mechanism 32. Then, the pinching mechanism 32 is closed and the locating pin 10b is pinched.

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 both the workpiece mounting parts 7a and 7b, and the workpiece attachment/detachment device is activated as shown in FIG. 5(g). Raise 2. 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. 5(h), the workpiece loading/unloading device 2 and the worktable 6 are horizontally moved in a direction away from each other, and the workpiece 10 on the worktable 6 is processed by the printed circuit board drilling machine 5. During this machining, the workpiece loading/unloading device 2 is raised and the workpiece 10 set in the workpiece mounting section 7b is placed in the workpiece stocker 1.
6 and set the unprocessed workpiece 10 in the workpiece stocker 16 to the workpiece mounting portion 7b.

That is, when the printed circuit board hole punching machine 5 starts machining the unprocessed workpiece 10, first the workpiece mounting/detaching device 2 is raised to adjust the vertical position of the processed workpiece 10 set in the workpiece mounting section 7b. The work gripping mechanism 21
between both claws 25 and 27.

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 11 of the workpiece mounting section 7b
The workpiece 10 is gripped by the workpiece gripping mechanism 21 while the workpiece 10 is gripped by the grippers 12b and 12b, and after gripping, the both claws 11b
, 12b may be released.

Once the processed workpiece 10 is gripped by the workpiece gripping mechanism 21, the workpiece attachment/detachment g2 is lowered, and the workpiece gripping mechanism 21 is moved to the workpiece stocker 16 side and stored in a required storage shelf 16b of the workpiece stocker 16. do.
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, unprocessed workpieces 10 are taken out from the workpiece stocker 16 by the work gripping mechanism 21 and placed in each workpiece mounting section 7b. Set sequentially.
At this time, if there is no unprocessed work lO in the work stocker 16, that is, if the work stocker 16 is filled with processed works 10, the transport mechanism 18 shown in FIG. The work stocker 16 is transported to the discharge position indicated by 16'', and the work stocker 16, which is in the standby position indicated by 16', is moved to the solid line position to perform the work.

Therefore, during the machining of the workpiece 10, the machined workpiece 1
0 into the work stocker 16 and loading the unprocessed work 10! l! 2, the time required to replace the workpiece 10 can be significantly reduced.

Furthermore, since the machined workpiece 10 and the unprocessed workpiece 10 are exchanged by rotating the workpiece attachment/detachment device 2 around the central axis O, the device can be configured in a narrow floor space. .

In addition, in one aspect of the embodiment described above, as shown in FIGS. 5(a) to (h), the workpiece loading/unloading device 2 is moved vertically or horizontally many times to exchange the workpieces. However, depending on the configuration of the work table 6 or 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 conveying device that reciprocates between the workpiece loading/unloading device and the workpiece 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 grips the processed workpiece on the worktable, the workpiece loading/unloading device is reversed, and the unprocessed workpiece that has been moved from the top side to the bottom side is set on the worktable and processed. ,
During this processing, the processed workpiece that has 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. Loss time during replacement can be significantly reduced to virtually zero.

In addition, since the workpieces are replaced by rotating the workpiece attachment/detachment device around its axis, the workpieces can be replaced in one operation regardless of the number of workpiece mounting sections, resulting in high work efficiency.

The device configuration can be downsized and floor space can be saved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of the 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 diagram showing the relationship between the work loading/unloading device and the work table, No. 5
Figures (a) to (h) are explanatory diagrams sequentially illustrating 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; Worktables 7a, 7b; Workpiece mounting section 8; Rotating device 9; Slide lifting device 10 ; Word 2 ('L) Figure 5 cd)

Claims (1)

[Scope of Claims] 1) A workpiece attachment/detachment device which is provided with a plurality of workpiece attachment parts 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 attachment parts, and this workpiece. A workpiece transport device that moves back and forth between the workpiece loading/unloading device and the workpiece storage section, takes out unprocessed workpieces from the workpiece storage section, sets them in the workpiece loading/unloading device, and takes out processed workpieces from the workpiece loading/unloading device and returns them to the workpiece storage section. The lower workpiece mounting section of the workpiece loading/unloading device, in which the unprocessed workpiece is set in the upper workpiece mounting section, grasps the processed workpiece on the worktable of the printed circuit board hole punching machine, 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 drilling machine,
The work transfer device sequentially returns processed workpieces set in the upper workpiece mounting section to the workpiece storage section and sets unprocessed workpieces in the workpiece storage section to the upper workpiece mounting section. How to change the workpiece of a printed circuit board hole drilling machine. 2) A workpiece loading/unloading device which is provided with a plurality of workpiece mounting portions in the axial direction on the upper and lower surfaces thereof and is capable of rotating around the axis to reverse the upper and lower workpiece loading portions, and this workpiece loading/unloading device and the work storage portion. The machine reciprocates between the two, takes out the processed workpiece set in the upper workpiece mounting section, and returns it to the workpiece storage section, and sets the unprocessed workpiece in the workpiece storage section into the empty upper workpiece mounting section. The machine is equipped with a workpiece transfer device that grips the processed workpiece on the worktable of the printed circuit board drilling machine with the workpiece mounting section on the lower side, and also inverts the workpiece loading/unloading device to transfer the unprocessed workpiece to the worktable. A workpiece changing device for a printed circuit board hole punching machine, which is characterized in that it can be set to.