JPH0761642B2 - Processing material supply device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a work material supply device arranged in the front part of an upper and lower surface sanding device.

[Prior Art] It is desirable to evenly grind the front and back surfaces of a machined material such as plywood when it is ground to a predetermined thickness. This is because it is recognized that when only one surface is ground or the front and back surfaces are unevenly ground, the expansion coefficient and the like on the front and back surfaces are different and the product warps.

Therefore, conventionally, in order to uniformly grind the front and back surfaces of the processed material, first grinding one surface with a sanding device,
It was turned over and re-ground.

By the way, according to such means, first, the thickness of the processed material is measured, the grinding thickness is calculated from the required product thickness, and half of the grinding thickness is set as the grinding thickness per one time, and the elevation amount of the sanding frame is adjusted based on this. It took several steps and was extremely complicated. Moreover, since it is practically impossible to make such adjustments for each processed material, in the case of the same type of processed material, continuous work is performed without adjustment, which results in uneven thickness of the processed material. As a result, the front and back surfaces could not be evenly ground in practice.

Furthermore, the work of turning over and re-supplying had to rely on human labor, and the workability was extremely poor.

Further, there is also a drawback that the control device becomes complicated by requiring an adjusting mechanism such as narrowing the material feeding passage interval by the grinding thickness after the forward grinding.

[Problems to be Solved by the Invention] In order to correct the above-mentioned drawbacks of the conventional means without requiring reciprocal grinding, sanding heads are provided on the upper and lower frames, respectively, so that the sanding heads can be adjusted to be relatively close to each other. An upper and lower sanding device with spacing can be proposed.

By the way, in supplying the working material to the sanding device, the product thickness of the working material is determined by the feeding distance between the sanding heads, but the working material thickness supplied between the sanding heads varies. Moreover, the upper and lower sanding heads must be supplied so as to produce a uniform grinding thickness.

Therefore, at the center of the material feeding interval of the upper and lower sanding device,
There is a new problem that the work material must be supplied so that the center of the work material is located.If this problem is not overcome, the upper and lower surface sanding device can perform uniform grinding of the front and back surfaces of the work material. You can't do it, and it makes no sense.

Therefore, as shown in FIG. 1, processing is provided in the front part of an upper and lower surface sanding device in which sanding heads are provided on the upper and lower frames so that the sanding heads can be adjusted to be relatively close to each other, and a material feeding interval is created between the sanding heads. In the material feeding device, the lower guide device 2 and the upper guide device 3 whose front end faces the sanding heads 10a and 10b are connected by a parallel link 4, and a substantially horizontal work material is inserted between the two guide devices 2 and 3. Passage p
And the movable frame 6 pivotally supporting the parallel link 4 by the swing shaft 5 so that the center line 1 of the insertion passage p has the sanding heads 10a, 10a.
A lifting control device 7 that moves to a position that coincides with the center of the material feeding interval s between b, and a position holding device 8 that holds the lower guide device 2 at a position where the working material is pinched when the working material is supplied.
The one with and was proposed.

However, in this configuration, when the lower guide device and the upper guide device are connected only by the parallel links, the upper and lower guide devices move in the vertical direction and rattle due to vibrations and the like accompanying the traveling of the processed material. However, there is a problem that the processed material cannot be stably run.

The present invention has an object of improving a processing material supply device used for supplying the processing material to the upper and lower surface sanding devices.

[Means for Solving the Problems] The processing material supply device of the present invention has the configuration of FIG. 1, and in the upper guide device 3, a reference pressing roll that elastically contacts the processing material is provided on the side of the material feeding passage. A first lock that is provided and restrains the roll to the reference pressure roll so that the roll cannot be moved up and down with the supply of the work material, and releases the restraint in synchronization with the front end of the work material passing immediately below the roll. The device is linked, and the position holding device is linked to the lower guide device 2 and urged upward to immobilize the lower guide device in synchronism with the front end of the processed material passing through the reference pressing roll. A second lock device for holding the lower guide device 3, an urging device for urging the lower guide device 3 upward, and a stopper for defining an upper limit position of the lower guide device 3.

[Operation] Due to the operation of the parallel link 4, the lower guide device 2 and the upper guide device 3 are relatively close to each other while maintaining the parallel relationship.
At this time, the lower guide device 2 maintains the upper limit position defined by the stopper by the urging device, and only the upper guide device 3 can actually move up and down.

A material feeding passage p is provided between the guide devices 2 and 3. Then, when the movable frame 6 is lifted by the lifting control device 7, the swing shaft 5, which is a pivot point between the parallel link 4 and the movable frame 6, is lifted, and the upper guide device 3 is lifted following this, and the sanding head is moved. It is controlled so that the center of the material feeding interval s between 10a and 10b and the center line l of the material feeding passage p of the guide devices 2 and 3 are aligned. The vertical interval of the material feeding passage p is set to be slightly smaller than the thickness of the processed material to be supplied.

After that, the processed material is supplied to the material feeding passage of the supply device, the reference pressing roll is fixed by the first locking device, and the processed material is supplied. With this supply, the guide devices 2 and 3 are slightly opened against the upward bias by the biasing device due to the thickness of the processed material, and the processed material is advanced while being sandwiched. Then, when the front end of the processed material comes directly below the reference pressure roll fixed to the upper guide device 3, the set interval of the material feeding devices 2 and 3 is fixed, and when the front end of the processed material is passed, the second locking device is activated. Driven to lock the lower guiding device and at the same time unlock the first locking device. When the second locking device is driven, not only the lower material feeding device 2 but also the upper material feeding device 3 is fixed. This is because the two devices are covered by the parallel link 4, and when one is raised, the other is lowered, and when one is fixed, the other is immovable.

As described above, the reference pressure roll is once fixed because if it is not fixed, the roll has the same function as a normal pressure roll that elastically holds the surface of the processed material. The position is not fixed with respect to the material feeder. Therefore, in order to determine the positions of the upper and lower guide devices 2 and 3, it is necessary to temporarily fix the position of the contact portion (pressing roll).

Then, at the same time when this position setting is made, the second lock device is driven to fix the positions of the upper and lower guide devices 2 and 3, and the first lock device is released to elastically contact the work material of the pressing roll. Will be restored. As a result, even if there is a variation in the thickness of the processed material, it is possible to absorb the unevenness by the plurality of pressure rolls attached to the upper guide device 3 and feed the material without trouble. If the pressure roll remains fixed, if the processed material has a thick portion, it cannot be absorbed and cannot be supplied.

Thus, the upper and lower guide devices 2 and 3 are fixed to each other while forming an appropriate material feeding passage p corresponding to the thickness of the processed material, and no flapping or the like occurs.

[Embodiment] A first embodiment of the present invention will be described with reference to FIGS.

A is an upper and lower sanding device, which is an upper and lower frame 50.
A and 50b are vertically opposed to each other with a material feeding passage 51, and the upper frame 50b is supported by a support shaft 53 so as to be able to move up and down. A description of this lift control mechanism is omitted. A sanding head 10a is arranged on the lower frame 50a, and a sanding head 10b is arranged on the upper frame 50b. The sanding heads 10a, 10b are formed by driving the driving rolls 11a, 11b and the contact rolls 12a, 12b around the sanding belts 13a, 13b. The material feeding interval s that determines the predetermined product thickness of the processed material w is formed. In the material feeding passage 51, a processed material receiving surface 55 continuous with the grinding end e of the contact roll 12a of the sanding head 10a is arranged on the upper surface of the lower frame 50a, and one of the material feeding surfaces 55 serves as a driving roll. A post-feeding device 56, in which a feed belt 59 is stretched around rolls 57 and 58, is provided, and the processed material w that is supplied to the feed passage 51 and ground is discharged backward. Further, on the lower surface of the upper frame 50b, a pressing roll 60 for stepping on the processed material w traveling in the material feeding passage 51 from above is provided.
A plurality of them are arranged along.

In addition, the upper and lower surface sanding device A is provided with an elevating handle and an operation panel for adjusting the upper frame 50b up and down.

At the front part of the upper and lower surface sanding device A, a work material supplying device B according to the present invention is provided.

The processing material supply device B is arranged on the mounting frame 52 extending from the front edge of the lower frame 50a.

Here, 1 is a pinching body, which connects a lower guide device 2 and an upper guide device 3 by parallel links 4 on both side surfaces thereof, and feeds a substantially horizontal work material between both guide devices 2 and 3. A passage p is formed.

The configuration of the lower guide device 2 will be described.

Receiving frame-shaped lower material feeding frame with rising walls at the front and rear
A material feeding roll 16a, 16b having one of the front and rear as a driving roll is pivotally supported at 15, and a material feeding belt 17 is stretched over the material feeding roll 16a, 16b, and the upper surface of the material feeding belt 17 is fed. The material surface.

Instead of the material feeding belt 17, a roll conveyor formed by arranging a plurality of idle rolls may be applied. Further, the material-sending rolls 16a and 16b may both be idle rolls, and the material-sending belt may be driven in accordance with pushing of the processed material w by an operator or the like.

Further, a lower surface guide plate is provided on the supply end side of the lower material feeding frame 15.
18 is fixed, and the lower surface pressing plate 19 extending to the vicinity of the grinding end e of the contact roll 12a of the sanding head 10a is fixed to the front end side.

Next, the structure of the upper guide device 3 will be described.

Inside the rectangular frame-shaped upper frame 20, a plurality of pressing rolls 21 urged downward by springs are pivotally supported along the lower edge of the upper frame 20. Of these, the pressure roll on the supply end side is the processed material detection roll 21a that turns on the limit switch LS by the floating operation. The work material detection roll 21a has a weaker urging force than the other pressing rolls 21 and when the work material front end is inserted into the material feeding passage p, the work material detection roll 21a is raised before the lower guide device 2 and the upper guide device 3 are moved up and down. If the amount of increase is excessive (the thickness of the processed material is excessive), the thickness abnormality lamp 23a is turned on to give a warning. If the processed material w is within the predetermined thickness, the normal thickness lamp 23b is turned on.

Further, this processed material detection roll 21a is provided in the vicinity of the central portion of the upper guide device 3 and has two front and rear reference pressure rolls 21a.
Drive timing control of the pneumatic lock cylinder 22 (first lock device) in which cylinder rods are fixed to b and 21b is performed. The lock cylinder 22 is a well-known one in which the rod is fixed in an occlusal shape by air control so that it cannot be moved back and forth.

The lock cylinder 22 locks the reference pressing rolls 21b, 21b so as not to be able to move up and down, and when the lock is released, the reference pressing rolls 21b, 21b elastically contact the upper surface of the workpiece so as to move up and down. This timing control is performed due to the ON operation of the processing material detection roll 21a, the reference pressure rolls 21b and 21b are temporarily locked with the supply of the processing material, and the front end of the processing material is directly below the reference pressure rolls 21b and 21b. The lock is released in synchronization with the arrival at the position. As an example of this timing control, as shown in FIG. 2, as the limit switch LS is turned on by the floating of the workpiece detection roll 21a, the counter C connected to the central control unit CPU is operated, and the counter C , The material feeding roll 16a
The pulse generated by the detector for detecting the amount of rotation of the output shaft of the drive motor is calculated, and the counted value is set in the counter C in accordance with the timing when the processed material arrives just below the front reference pressing roll 21b. The lock cylinder 22 may be unlocked when it coincides with the value. At this time, lock driving of the lock cylinder 37 described later is also performed at the same time. Incidentally, the lock command of the lock cylinder 22 may be performed in synchronization with the processing material detection by the processing material detection roll 21a, or a switch for detecting the end of grinding of the processing material, and further by the ON operation of a manual switch. Various controls such as execution are possible.

An upper surface guide plate 25 is provided on the supply end side of the upper frame 20, and an upper surface pressing plate 26 extending near the grinding end e of the contact roll 12b is provided on the front end side.

A parallel link 4 is rotatably connected to the side surfaces of the guide devices 2 and 3 by supporting shafts 28a and 28b. The swing shaft 5 of the movable frame 6 is inserted between the support shafts 28a and 28b. The base part 29 of the movable frame 6 is arranged below the lower guide device 2 in the width direction, and the swing shaft 5 is inserted through the upper edge of the support frame 30 standing on the front and rear ends thereof. The parallel link 4 is swingably supported. Further, the movable frame 6 is adjusted up and down by the up-and-down controller 7. The elevating control device 7 has a configuration in which an elevating screw 32, which is screwed in a vertical direction on a base 29, is rotated by an elevating motor 33.

Further, on the lower surface of the lower material feeding frame 15 of the lower guide device 2, a support base 36 supported by a lock cylinder 37 (second locking device) on the mounting frame 52 via a feed link roller 35 is arranged. Has been done. This lock cylinder 37
The second lock device of the present invention and the biasing device that biases the lower guide device 3 upward are combined. Further, the feed linking roller 35 makes the lower material feeding frame 15 immovable with respect to the support base 36 and is connected to the support base 36 so as to be movable back and forth. The lock switching of the cylinder rod of the lock cylinder 37 is synchronized with the lock release of the lock cylinder 22, and when the front end of the processed material passes through the left and right reference pressure rolls 21b, 21b, the lower guide device 2 is driven to lock. This timing control is as described above.

As shown in FIG. 4, in the lock cylinder 37, the cylinder rod 38 biased upward by the lock cylinder 37 is inserted into the support base 36, and the support piece provided on the cylinder rod 38.
39 is brought into contact with the lower surface of the support base 36 to receive the weight.
Further, a rod-shaped stopper 40 is inserted into the support base 36 and the mounting frame 52 to restrict the rise of the support base 36. Furthermore, the support rod 41 is fixed to the support base 36, and the mounting frame 52
The support rod 41 is inserted through a bearing 42 provided in the.

Even if the movable frame 6 is lifted by the lifting control device 7, the lower guide device 2 is restrained from moving upward by the stopper 40 via the support base 36, and the restraining position is set at the biasing pressure of the cylinder rod 38. Held by. That is, the position constrained by the stopper 40 becomes the home position. At this fixed position, the lower surface pressing plate 19 of the lower guide device 2 substantially coincides with the height of the grinding end e of the contact roll 12a of the sanding head 10a.

Further, when the processed material w is supplied to the material feeding passage p, the lower guide device 2 is pushed downward by the grinding thickness, but at this time, the cylinder rod 38 of the lock cylinder 37 maintains the upward biasing pressure. , Withdrawal together with the support rod 41.

Next, the operation of this embodiment will be described.

According to the product thickness of the processed material w, the upper frame 50b of the upper and lower surface sanding device A is adjusted by rotating the elevating handle, and the material feeding interval s between the contact rolls 12a and 12b of the sanding heads 10a and 10b is predetermined. Interval Then, the elevating motor 33 of the elevating control device 7 is driven to rotate the elevating screw 32 to elevate the movable frame 6 to move the swing shaft 5 pivotally supported by the parallel link 4 to the feeding interval s. The center position of.

The movable frame 6 is moved up and down by the swing shaft 5 as the support shaft 28.
Since it is located in the middle between a and 28b, it is half the amount of elevation of the upper frame 50b. Therefore, since the moving amounts of the two have a correlation, the sanding heads 10a, 10b and the swing shaft 5 can be automatically set to proper positions by inputting a numerical value from the operation panel.

The swing shaft 5 does not necessarily have to be positioned in the middle between the support shafts 28a and 28b. Even when the swing shaft 5 is set to a position other than this, the movable frame 6 and the upper frame 50b naturally have a predetermined correlation. For example, when the position of the swing shaft 5 is relative to the distance L between the support shafts 28a and 28b,
If set to the 1 / 4L position from the support shaft 28a side, the upper frame 50b
It can be calculated that the center position of the support shafts 28a and 28b (the center line l position of the material feeding passage p) can be made coincident with the center of the material feeding interval s by the amount of ascent and descent of 1 /.

Due to this rise, the lower guide device 2 cannot be raised by the stopper 40, so only the upper guide device 3 moves. The distance between the material feeding passages p is such that the lower surface pressing plate 19 of the lower guide device 2 is located at the grinding end e of the contact roll 12a, and the position of the swing shaft 5 is an intermediate position of the material feeding distance s. The action of the parallel link 4 causes the upper pressing plate 26 to be positioned at the grinding end e of the contact roll 12b.
After all, the interval of the material feeding passage p becomes substantially equal to the interval of the material feeding interval s.

When the material-sending rolls 16a and 16b are rotated to cause the material-sending belt 17 to travel, and then the processing material w is supplied between the guide plates 18 and 25, the processing material w has a material-sending interval s corresponding to the grinding thickness. Since it is thicker, it is slightly lowered against the urging force of the lock cylinder 37 by that thickness, and the upper portion of the upper guide device 3 is raised by the same amount by the action of the parallel link 4.

As described above, at the beginning of supplying the processed material, the processed material detecting roll 21a acts to detect and remove the excessively thick processed material w.

Further, by the processing material detection roll 21a detecting the processing material, the lock cylinder 22 is locked, the reference pressing rolls 21b and 21b are fixed to the upper guide device 3, and the lock cylinder 22 is unlocked and A counter C for timing the lock driving of the lock cylinder 37 operates.

Then, since the guide devices 2 and 3 retract by an equal amount for the grinding thickness, the center position of the processed material w (the center line 1 of the material feeding passage p) does not change, and the processed material w has its lower surface. Material feeding belt
It is pressed against 17 and runs. Then, when the processed material comes directly under the reference pressing rolls 21b, 21b, a position corresponding to the thickness of the processed material is fixed between the guide devices 2 and 3, and then the front end of the processed material is the reference pressing roller 21b at the front. The set count value of the counter C is consumed in synchronization with the passage of the
22 is unlocked and the lock cylinder 37 is locked. As a result, the lower guide device 2 and the upper guide device 3 are fixed, and thereafter there is no relative movement between the guide devices 2 and 3.
Further, the reference pressure rolls 21b, 21b are released from the restraint, and like the other pressure rolls 21, are elastically contacted with the upper surface of the processed material.
As a result, even if the thickness of the processed material varies, it can be absorbed by the plurality of pressing rolls 21 and 21b attached to the upper guide device 3 and the material can be fed without any trouble.

Then, the upper and lower guide devices 2 and 3 are fixed to each other while generating an appropriate material feeding passage p corresponding to the thickness of the material to be worked, without causing fluttering, etc. Is supplied from the space between the pressing plates 19 and 26 to the material feeding space s, and is ground equally by the sanding heads 10a and 10b.

In each of the above-described embodiments, the workpiece supplying device B applied to the upper and lower surface sanding device A in which the lower frame 50a is fixed and only the upper frame 50b moves up and down has been described, but the lower frame 50a and the upper frame 50b respectively move up and down. Even if there is one, it is sufficient to operate the elevating control device 7 so that the parallel link 4 is located at the center of the feeding interval s.
The present invention is applicable and is not limited by the configuration of the upper and lower surface sanding device A.

[Advantages of the Invention] As described above, the present invention provides sanding heads 10a and 10b.
The center line l of the processed material w is always positioned at the center of the material feeding interval s between the two feeding devices so that the working material w can be supplied at the material feeding interval s. After the position is determined according to the thickness of the processed material, the guide devices 2 and 3 can be fixed. Therefore, the upper and lower surface sanding device A having the sanding heads 10a and 10b on the upper and lower sides. It is possible to stably supply the processed material, and there is an excellent effect that it can be ground and polished satisfactorily.

[Brief description of drawings]

FIG. 1 is a principle diagram showing the constituent elements of this type of work material supply apparatus. 2 to 4 show an embodiment of the present invention,
2 is a partially cutaway side view, FIG. 3 is a partially cutaway front view, and FIG. 4 is a vertical sectional front view showing the position holding device 8. A: Top and bottom sanding device B: Work material supply device s: Material feeding interval p: Material feeding passage w: Work material 1 ... Clamping body 2 ... Lower guide device 3 ... Upper guide device 4 …… Parallel link 5 …… Swing shaft 6 …… Movable frame 7 …… Elevation control device 10a, 10b …… Sanding head 12a, 12b …… Contact roll 21a …… Processed material detection roll 21b, 21b …… Standard pressing roll 22 …… Lock cylinder (first lock device) 37 …… Lock cylinder (second lock device) 40 …… Stopper

Claims (1)

[Claims] 1. A processing material supply device arranged at the front part of an upper and lower surface sanding device, in which sanding heads are provided on upper and lower frames so that relative distance between them can be adjusted, and a material feeding interval is created between the sanding heads. There is a pinching body formed by connecting a lower guide device and an upper guide device whose front ends face each other between the sanding heads by a parallel link, and generating a substantially horizontal insertion passage of the processed material between the guide devices. An elevating control device for moving a movable frame pivotally supporting the parallel link by a swing shaft to a position where the center line of the insertion passage coincides with the center of the material feeding interval between the sanding heads; And a position holding device for holding the lower guide device at a position where the processed material is clamped when the material is supplied to the upper guide device. An elastic reference pressure roll is provided, and the reference pressure roll is constrained so that the roll cannot move up and down with the supply of the work material, and the front end of the work material is restrained in synchronization with the fact that the front end of the work material passes directly under the roll. The lower guide is synchronized with the first lock device to be released and the position holding device is urged upward in cooperation with the lower guide device so that the front end of the processed material passes through the reference pressing roll. A work material supply comprising a second lock device for holding the device immovable, a biasing device for biasing the lower guide device upward, and a stopper for defining an upper limit position of the lower guide device. apparatus.