JPH0425368A - Grinding device for belt like work - Google Patents

Abstract

PURPOSE:To secure the loose rotation of a work roll corresponding to the specific control speed of the work and to prevent the slack, by mounting a braking abutment plate on the peripheral face of the work roll. CONSTITUTION:A work roll (x) supported on the loose rotating roll shaft 25 of an uncoiler 20 is rotated with its being pulled by the feed driving force of a wide belt sanding machine 1 and recoiler 50, but is loosely rotated excessively by the force of inertia thereof and this becomes the cause of the slack of the work W between the wide belt sanding machine 1 and uncoiler 20. In this case, a braking abutment plate 32 is mounted on the peripheral face of the work roll (x) and so the excessive loose rotation is checked and the slacking is prevented with the loose rotation of the work roll (x) corresponding to the driving control speed of a work (w) being secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a grinding device for a strip-shaped workpiece that is wound into a roll.

[Prior Art 1] Strip-shaped processed materials made of continuous ultra-thin veneers are on the market as products that can be easily used for various purposes such as being used for surface finishing of furniture and fittings.

This strip-shaped processed material is wound up into a roll and handled.

For this reason, when grinding and polishing this strip-shaped workpiece, the workpiece roll that has been wound up in the previous process is supported in advance so that it can freely rotate with a recoiler, and the strip-shaped workpiece is pulled out from the workpiece roll and then belted into a wide belt. It is necessary to run the sander and wind the work material into a roll again by winding it around a winding bobbin fitted on a rotating shaft driven and rotated by a variable speed drive motor in a recoiler.

Therefore, a material feeding device and a grinding head formed by running an endless sanding belt around a plurality of running rolls are installed vertically opposite each other through a material feeding path, and the endless sanding belt is pressed against the strip-shaped material. and a wide belt sander machine that grinds the surface of the workpiece, and a belt processing machine that is installed at the front of the wide belt sander machine, supports the workpiece roll on an idling roll shaft, and is wound around the workpiece roll. An uncoiler that supplies the material to the material feeding path of the wide belt sander machine, and a drive roll shaft installed at the rear of the wide belt sander machine that winds the ground material into a roll. A grinding device for belt-shaped workpieces has been proposed, which is equipped with a recoiler that takes the workpiece.

The present invention resides in a grinding device for such a strip-shaped workpiece, which allows the workpiece to run smoothly without bending or excessive tension,
The purpose is to allow it to be rolled up.

[Means for Solving the Problems] The first invention of the present application resides in the above-mentioned grinding device, in which the uncoiler is mounted on the circumferential surface of the work material roll to prevent idle rotation of the roll. It is equipped with a brake abutment plate.

Further, the second invention is such that the workpiece is mounted on the upper surface of the workpiece at the front part of the grinding part of the material feeding path of the wide belt Santa machine,
A pressure plate is provided to level the processed material into a flat plate.

In a third aspect of the invention, a follow-up roller is pressed against the circumferential surface of a take-up roll supported by the rotating shaft of the recoiler, and the circumferential speed of the workpiece is detected based on the rotational speed of the roller. The speed of the variable speed drive motor of the rotary shaft is controlled so that the speed is constant.

[Function] In the first invention, the workpiece roll supported by the idle roll shaft of the uncoiler is pulled and rotated by the feeding driving force of the wide belt sander and the recoiler, but due to its inertia force. Excessive idle rotation causes sagging of the workpiece between the wide belt sander and the uncoiler. However, since a brake abutment plate is mounted on the circumferential surface of the workpiece roll, excessive idle rotation is prevented, and idle rotation of the workpiece roll corresponding to the drive control speed of the workpiece is guaranteed. Sagging is prevented.

In the second invention, the workpiece is pressed by a tread plate just before the grinding part of the wide belt sander and is leveled into a flat surface. Therefore, even if the workpiece is sent in a curved shape due to slack or curling, the workpiece will become flat and will be properly ground and polished.

Furthermore, if the winding rotational speed of the recoiler is constant, the circumferential speed will increase as the diameter of the workpiece roll increases, and for this reason, the workpiece will run excessively, causing the material to be fed by the wide belt sander. The tension may exceed the speed and cause slippage in the grinding area of the wide belt sander, making it impossible to properly grind and polish the workpiece or causing the workpiece to break. However, in this third invention, the following roll is circumscribed on the circumferential surface of the take-up roll, and the roll rotates with the circumferential speed of the take-up roll, so the rotational speed of this follow-up roll is detected. By doing so, the winding speed (peripheral speed) of the workpiece can be detected. Therefore, it is compared whether the detected running speed is equal to a predetermined running speed, and if it is different, the rotational speed of the variable speed drive motor that rotates the drive roll shaft that supports the take-up roll is adjusted. ,
The above-mentioned circumferential speed is corrected to become a retroactive speed.

[Example] An embodiment of the invention will now be described with reference to the accompanying drawings.

In Figure 1, l is a wide belt sander machine,
Driving rollers 4. A material feeding device 8 is constructed by supporting a driven roller 5 and wrapping a material feeding belt 6 around the rollers 4 and 5. Further, a grinding head 10 is mounted on a vertical frame 9 erected on the side of the wide belt sander l. The grinding head IO is provided with a guide roller 11 that also serves as a steering wheel at the upper part, and guide rollers 12 and 13 on the left and right sides of the lower part, and one of the guide rollers 11, 12, and 13 is used as a driving guide roll, and A treading device 14 is disposed between the guide rollers 12 and 13, and an endless sanding belt 15 is wrapped around these.
5 is pressed against the upper surface of the workpiece to perform grinding and polishing. The grinding head 10 and the material feeding device 8
The space between them is defined as a material feeding passage 16.

An uncoiler 20 is disposed at the front of the wide belt sander 1 having such a configuration.

The uncoiler 20, as shown in detail in FIGS. 2 and 3,
The bearings 23, 23 are fixed on the base 21, and the bearings 23, 2 are fixed on the base 21.
An idling shaft 24 is pivotally supported on the retracting shaft 24, and an idling roll shaft 25 is supported at the tip of the retracting shaft 24 so as to coincide with the material feed path of the wide belt sander 1 in the front and back directions. The workpiece roll X is tightly fitted into the idle roll shaft 25. The workpiece roll X is positioned in its width direction by regulating plates r, r fitted to the idle roll shaft 25.

Further, a support shaft 26 made of a round bar is fixed in the width direction to the end of the mounting frame 22 fixed on the base 21 and extending rearward, and a rotating cylinder 27 in the front-rear direction is attached to the support shaft 26. A collar 28 fixed to the upper part is movably fitted onto the outside. A swinging rod 30 is inserted into the rotating cylinder 27 and has a brake abutment plate 32 fixed thereto, which presses against the outer circumferential surface of the workpiece roll X at its tip end.

Further, the rotating tube 27 fixes the swinging rod 30 with a fixing screw 29, and cylindrical weights 34a and 34b are positioned at the front and rear of the rotating tube 27 with fixing screws 33.
is slidably fitted on the outside and by selecting its position,
By selecting the moment of force around the support shaft 26, it is possible to appropriately set the pressing force of the brake contact plate 32.

The uncoiler 20 having such a configuration uses the material feeding force of the material feeding device 8 of the wide belt sander 1 or the tensile force of the coiler 50 to be described later to rotate the idle roll shaft 25.
The strip-shaped workpiece W of the workpiece roll X fitted onto the outside is pulled and freely rotates together with the free rotation shaft 24. At this time, excessive free rotation is likely to occur in the workpiece roll X due to the inertial force accompanying the tension, but cylindrical weights 34a, 34
The brake contact plate 32 is mounted on the brake contact plate 32, which is adjusted to have an appropriate load according to b, and its excessive free rotation is suppressed. For this reason, the wide belt sander machine 1 and uncoiler 20
The belt-shaped processed material W does not sag between the belt-shaped material W and the belt-shaped processed material W is applied with an appropriate tension and travels toward the material feeding path 16 of the wide belt Sangu machine I.

In the material feeding path 16 of the wide belt Sangu machine 1, there is provided on the vertical frame 9 a pressure plate that is mounted on the upper surface of the workpiece W in front of the grinding area and presses the workpiece W into a flat plate shape. 4
0 is supported. This configuration will be explained in detail with reference to FIG.

A mounting plate 41 is fixed to the vertical frame 9, and a swinging rod 43 is rotatably supported on the plate 41 by a shaft 42. Further, a tread plate 40 having a weight 44 fixed to its upper surface supports a shaft support plate 45 on the swinging rod 43.
It is rotatably supported by being rotatably connected to the rear end of the support shaft 46 with a support shaft 46. Further, a handle 49 is fixed to the front end of the swinging rod 43 for tilting the swinging rod 43 about the shaft 42 and lifting the tread plate 40. Furthermore, a locking hook 47 is provided at the front end of the swinging rod 43.
is formed, and the attachment is performed using a hook 48 fixed to the plate 41.
By engaging the locking hook 47, the tread plate 40 can be supported at the floating position indicated by the chain line in FIG.

With this configuration, if the locking hook 47 is not hooked to the hook 48 (solid line position in FIG. 5), the tread plate 40 is rotatable with respect to the swinging rod 43, so that the material cannot be fed. The force of the weight 44 brings the treading pressure 12ii40 into surface contact with the strip-shaped workpiece W on the material-feeding belt 6 traveling by the device 8, leveling the strip-shaped workpiece W. Therefore, the strip-shaped workpiece W
Even if the material is bent, curled, wrinkled, etc., it is forcibly made smooth, so proper grinding and polishing can be performed at the primary grinding site.

In addition, when the tread pressure plate 40 does not require tread pressure, the swinging rod 43 is hung on the hook 48 as described above, and the tread pressure plate 40 is
hold in floating position.

The strip-shaped workpiece W that has been subjected to grinding and polishing at the grinding part of the wide belt Sangoo machine 1 is wound around a drive roll shaft 53 that is disposed at the rear of the wide belt Sangoo machine 1 or supported by a coiler 50. .

The structure of this recoiler 50 will be described in detail with reference to FIG. 6.7. A rotating shaft 54 having a driving roll shaft 53 is supported on a base 51 by bearings 52, 52. The width position of the drive roll shaft 53 is appropriately determined so as to face the material feeding path 16. A sprocket 55 is fixed to the end of the rotating shaft 54, and a variable speed drive motor M (
Sprocket 6 linked to the drive shaft (see Figure 7-8)
4 are connected by a chain 65, and the driving force of the variable speed drive motor M is applied thereto. The take-up roll y rotates at a predetermined speed.

A known slipping clutch 66 is disposed between the end of the rotating shaft 54 and the sprocket 55. When the sprocket 55 is overloaded, the slipping clutch 66 causes a slip between the sprocket 55 and the rotating shaft, thereby preventing the torque from exceeding a predetermined value from being generated. More specifically, to a hub fixed to the end of the pivot shaft.

A sprocket 55 is fitted through friction plates on the front and rear surfaces, and when excessive torque is generated on one side, the excess torque is absorbed by slipping between the friction plates and the sprocket. Therefore, when the material feeding speed decreases due to irregularities on the surface of the workpiece or excessive grinding resistance, the sprocket rotates idly and its driving force is alleviated.
The belt-shaped workpiece W wound around the drive roll shaft 53 is prevented from being overstressed.

By the way, as the strip-shaped workpiece W is wound up, the diameter of the take-up roll y increases, and the winding length per rotation becomes longer, and when the drive roll shaft 53 is rotated at a constant speed, the winding diameter increases. The winding speed becomes faster in proportion to the gradual increase, and may exceed the material feeding speed by the material feeding device 8. The occurrence of such a constant speed difference cannot be corrected only by the slipping clutch 66. I can't. And,
If such an increase in winding speed is left unchecked, unreasonable tension may be generated in the strip-shaped workpiece W, causing it to break. Alternatively, slipping may occur at the grinding site of the wide belt Sangu machine 1, deteriorating the grinding surface.

Therefore, this recoiler 50 is equipped with the following speed control means.

A follow-up roller 56 is pressed against the circumferential surface of the take-up roll y. The following roller 56 is freely rotatably supported at the tip of a swinging rod 58 whose one end is rotatably supported by a shaft 59 on a support rod 57 erected on the base 51. The movable rod 58 is pivotally supported on a rod of an elevating cylinder 60 whose one end is supported on the base 51, and by biasing the elevating cylinder 60 in the contraction direction, the following roller 56 is brought into pressure contact with the circumferential surface of the take-up roll y. 6), by extension of the lifting cylinder 60,
The following roller 56 is retracted to the floating position indicated by the solid line in FIG.

This follow-up roller 56 rotates following the rotation of the circumferential surface of the take-up roll y due to the pressing force of the elevating cylinder roller 0. Therefore, the rotation speed of the following roller 56 is proportional to the circumferential speed of the take-up roll y. Therefore, the rotational speed of the following roller 56 is detected, and the rotational speed of the variable speed drive motor M is controlled so that the circumferential speed matches the predetermined speed at which the material feeding speed of the material feeding device 8 becomes equal. .

Such control can be easily performed by the following means as shown in FIG. That is, a disk 61 having notches formed at equal intervals around the circumference is fixed to the rotating shaft of the following roller 56, and the passing of the notches is read by an encoder 62 connected to the central control unit CPU. , and add it to counter C. The read value for a certain period of time is then compared with the speed data stored in the data RAM RAM, and a speed control signal is generated in response to the difference. Since this output signal is a digital value, it is converted into a predetermined analog value by an A/D converter, and then passed through the inverter clock 3.
A corresponding voltage (or current) is applied to the variable speed drive motor M.

Therefore, the circumferential speed (winding speed) of the winding roll y becomes a constant speed that matches the material feeding speed of the material feeding device 8, and appropriate tension is applied to the strip-shaped material W, and the wide belt sungroove Good grinding and polishing can be performed without slipping at the grinding area of the machine.

The winding roll y wound in this way is moved to the drive roll shaft 5
3 and transferred to the next process. In order to facilitate this extraction, the drive roll shaft 53 is provided with a mechanism (not shown) capable of contracting its diameter.

In this way, the above-mentioned grinding device for strip-shaped workpieces is designed to prevent loosening, bending, and excessive tension during the process of pulling out, winding, and feeding the strip-shaped workpiece W. This enables smooth grinding and unwinding.

[Effects of the Invention 1] As described above, in the first invention, the braking contact plate mounted on the peripheral surface of the workpiece roll prevents excessive idle rotation of the workpiece roll. This ensures free rotation of the workpiece roll corresponding to a predetermined control speed of the workpiece, thereby preventing sagging.

In addition, in the second invention, the workpiece is flattened immediately before the grinding part of the wide belt Sangu machine, so even if the workpiece is sent in a curved shape due to slack, curling, etc. Also, the surface becomes flat and proper grinding and polishing processing is performed.

Furthermore, in the third invention, even if the diameter of the winding opening gradually increases, the winding speed is kept constant, which prevents slippage in the grinding part of the wide belt Sangu machine and prevents proper processing. Grinding and polishing of the material will not become impossible, and the processed material will not break.

Therefore, with each of these configurations, the workpiece travels at an appropriate speed, corrects unreasonable rapid travel, and cuts the workpiece.
No polishing defects will occur.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, in which Fig. 1 is a side view of a grinding device for a strip-shaped workpiece W, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged side view of the uncoiler 20, and Fig. 4. is the same plan view,
Fig. 5 is an enlarged side view of the main parts of the wide belt Sangu machine l showing the configuration of the treadle plate 40, Fig. 6 is an enlarged side view of the beam coiler 50, Fig. 7 is a plan view of the same, and Fig. 8 is the central control. Device C
It is a control mechanism diagram of PU. 1... Wide belt sander machine 8... Material feeding device 10... Grinding head 15... Endless sanding belt 16... Material feeding path 20... Uncoiler 25... Idle roll shaft 32 ... Brake contact plate 40 ... Pressure plate 44 ... Weight 50 ... Recoiler 53 ... Drive roll shaft 56 ... Follow roller 58 ... Swinging rod M ... Possible Variable speed drive motor W...Band-shaped workpiece X-...Workpiece roll y...Take-up roll

Claims (1)

[Claims] 1) A material feeding device and a grinding head formed by running an endless sanding belt around a plurality of running rolls are vertically opposed to each other via a material feeding path, and the endless sanding belt There is a wide belt sander machine that grinds the surface of the workpiece material by stepping on the belt-shaped workpiece material. an uncoiler that supplies the belt-shaped processed material wound on the wide belt sander to the material feeding path of the wide belt sander;
In the grinding device for a strip-shaped workpiece, which is disposed at the rear of a wide belt sander machine and includes a drive roll shaft for winding the workpiece, and a recoiler for winding the ground strip-shaped workpiece into a roll, the uncoiler. A grinding device for a strip-shaped workpiece, characterized in that a brake abutment plate is installed on the peripheral surface of the workpiece roll to prevent the roll from idling. 2) A material feeding device and a grinding head formed by running an endless sanding belt around a plurality of running rolls are arranged vertically opposite to each other via a material feeding path, and the endless sanding belt is pressed against the strip-shaped processed material. and a wide belt sander that grinds the surface of the workpiece, and a wide belt sander that is installed at the front of the wide belt sander, supports the workpiece roll on an idling roll shaft, and has a belt-shaped sander wound around the workpiece roll. an uncoiler that supplies processed material to a material feeding path of the wide belt sander;
In the grinding device for belt-shaped workpieces, which is disposed at the rear of a wide belt sander machine and includes a drive roll shaft for winding the workpiece and a recoiler for winding the ground workpiece belt-like material into a roll, Grinding of a strip-shaped workpiece, characterized in that a treadle plate is provided at the front of the grinding part of the material feeding path of a belt sander machine to ride on the upper surface of the workpiece and level the workpiece into a flat plate. Processing equipment. 3) A material feeding device and a grinding head formed by running an endless sanding belt around a plurality of running rolls are installed vertically opposite to each other via a material feeding path, and the endless sanding belt is pressed against the strip-shaped processed material. and a wide belt sander that grinds the surface of the workpiece, and a wide belt sander that is installed at the front of the wide belt sander, supports the workpiece roll on an idling roll shaft, and has a belt-shaped sander wound around the workpiece roll. an uncoiler that supplies processed material to a material feeding path of the wide belt sander;
A grinding device for a strip-shaped workpiece, which is disposed at the rear of a wide belt sander machine and includes a recoiler that winds the ground strip-shaped workpiece into a roll on a drive roll shaft that winds the workpiece, the recoiler A follow-up roller is pressed against the circumferential surface of a take-up roll supported by a drive roll shaft, and the circumferential speed of the workpiece is detected based on the rotational speed of the roller,
A grinding device for a strip-shaped workpiece, characterized in that a variable speed drive motor for the rotary shaft is controlled in speed so that the circumferential speed is constant.