JP3851991B2 - Cutting position adjusting device for double-sided board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting position adjusting device in a two-sided lathe capable of cutting an upper surface and a lower surface of a supplied material almost uniformly.
[0002]
[Prior art]
A double-sided board generally includes a pair of upper and lower rotary blades parallel to each other. Therefore, this machine cuts the upper and lower surfaces of the supplied material simultaneously via the upper and lower rotary blades by appropriately setting the height position of the lower rotary blade and the interval between the upper and lower rotary blades. And finished to a predetermined finish thickness. The lower rotary blade is set at a position slightly higher than the lower surface of the material to be supplied, and the upper rotary blade is spaced at an interval corresponding to the finished thickness of the material. It may be set above.
[0003]
[Problems to be solved by the invention]
According to such a conventional technique, since the height positions of the upper and lower rotary blades are manually set, if the cutting amount of the lower rotary blade is set to a slight constant amount, the maximum allowable cutting of the upper rotary blade is set. The maximum thickness of the material that can be cut is limited by the amount, and there is a problem that the allowable range of the thickness of the material is narrow. Also, adjusting the height position of the lower rotary blade in accordance with the thickness of the material to be supplied and manually setting the cutting amount optimally is too complicated and impractical.
[0004]
Accordingly, in view of the problems of the prior art, an object of the present invention is to combine a measurement mechanism that measures the thickness of the material, a controller, and a setting mechanism that sets the height positions of the upper and lower rotary blades. It is an object of the present invention to provide a cutting position adjusting device for a double-sided board that can make the cutting amounts of the upper surface and the lower surface substantially uniform and expand the allowable range of the thickness of the supplied material.
[0005]
[Means for Solving the Problems]
In order to achieve this object, the structure of the present invention includes a fixed frame, upper and lower movable frames that are mounted on the fixed frame so as to freely move up and down, and are connected via ball screw shafts. A cutting position adjusting device for a double-sided board provided with an upper and lower rotary blade fixed to face up and down via a measuring mechanism that measures the thickness of the supplied material and outputs it as a thickness signal; Each time a thickness signal from the measuring mechanism is input, a controller that compares the set thickness with the material thickness and outputs a plurality of selection signals, and a liner that sets the upper limit of the lower movable frame according to the selection signals from the controller And a setting mechanism that automatically sets the height positions of the upper and lower rotary blades so that the cutting amounts on the upper and lower surfaces of the material are substantially equal without changing the interval between the upper and lower rotary blades. The door and the gist thereof.
[0006]
The measurement mechanism can include a presser roller that presses the material, an air cylinder that drives the presser roller up and down, and an encoder that measures the lift stroke of the presser roller.
[0007]
Further, the setting mechanism can select one of a plurality of liners having different thicknesses.
[0008]
[Action]
According to the configuration of the invention, the measuring mechanism measures the thickness of the supplied material and outputs a thickness signal to the controller, and the setting mechanism determines the height of the rotary blade of the double-sided board according to the selection signal from the controller. The position can be set. Therefore, the setting mechanism automatically sets the height position appropriately without changing the distance between the upper and lower rotary blades according to the thickness of the material, and makes the amount of cutting on the upper and lower surfaces of the material almost uniform. can do.
[0009]
When the measurement mechanism includes a presser roller, an air cylinder, and an encoder, the presser roller presses the material by descending through the air cylinder. At this time, the encoder measures the lifting stroke of the presser roller. The thickness of the material can be measured and a thickness signal can be output.
[0010]
The setting mechanism can change the height position of the rotary blade easily and accurately by selecting one of a plurality of liners having different thicknesses.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
The two-sided cutting position adjusting device includes a measuring mechanism 10, a controller 20, and a setting mechanism 37 (FIG. 1). However, the measurement mechanism 10 is installed on the carry-in side of the two-sided board 30 (FIG. 2), and the setting mechanism 37 is mounted on the two-sided board 30. .
[0013]
The measuring mechanism 10 is configured by incorporating a presser roller 12 into a small box-shaped frame 11 so as to be movable up and down (FIGS. 2 and 3). The frame 11 is formed in a vertically long shape with an open back surface, and a vertically long slot 11a is formed in the front surface. An air cylinder 13 is erected downward on the frame 11, and a rod 13a of the air cylinder 13 is connected to a slide base 14 that is incorporated in the frame 11 so as to be movable up and down via a bracket 14a. Sliders 14b and 14b are respectively attached to the left and right sides of the slide base 14. Guide rods 11b and 11b standing on the left and right sides of the frame 11 are slidably inserted into the sliders 14b and 14b. Yes.
[0014]
A motor 12a is attached to the rear surface of the slide base 14, and the presser roller 12 is fixed to the shaft end of the motor 12a. The shaft of the motor 12a passes through the long hole 11a of the frame 11 in the front-rear direction. Feed rollers 15, 15... Are arranged at the lower front surface of the measuring mechanism 10, and each feed roller 15 is rotationally driven all at once via a drive motor (not shown) to feed the material W to the double-sided board 30. Can be supplied (in the direction of arrow A in FIG. 2). Therefore, the presser roller 12 can press the upper surface of the material W on the feed rollers 15, 15... By extending the air cylinder 13 and lowering the slide base 14.
[0015]
The double-sided board 30 includes a fixed frame 31, upper and lower movable frames 32 and 33, and upper and lower rotary blades 34 and 35 as main members (FIGS. 2 and 4). The fixed frame 31 is formed in an L shape by projecting a base portion 31a on the front side, and a fixed table 31b is formed on the base portion 31a corresponding to the supply position of the material W. A pair of left and right guide rails 31 c and 31 c are attached to the front surface of the fixed frame 31 in the vertical direction.
[0016]
The lower movable frame 32 is a frame body bent in an L shape, and is disposed so as to surround one side surface and the rear surface of the fixed table 31b. A pair of left and right sliders 32a, 32a,... Adapted to the guide rails 31c, 31c are attached to the rear surface of the movable frame 32. Therefore, the movable frame 32 is mounted on the fixed frame 31 so as to be movable up and down.
[0017]
An air cylinder 32b is incorporated in the movable frame 32, and the air cylinder 32b is installed upward on the base portion 31a of the fixed frame 31 via a mounting base 32b1. The rod 32b2 of the air cylinder 32b is connected to the movable frame 32 via a bracket 32c that is mounted downward on the top surface of the movable frame 32. Therefore, the height of the movable frame 32 can be adjusted with respect to the fixed table 31b by expanding and contracting the air cylinder 32b. That is, the movable frame 32 can be raised higher than the fixed table 31b by extending the air cylinder 32b, and can be lowered lower than the fixed table 31b by shortening the air cylinder 32b.
[0018]
The upper movable frame 33 is formed in a box shape with an open top, and a pair of left and right sliders 33a, 33a,... Adapted to the guide rails 31c, 31c are attached to the rear surface. The movable frame 33 is mounted on the upper portion of the front surface of the fixed frame 31 via sliders 33a, 33a, ..., guide rails 31c, 31c so as to be movable up and down.
[0019]
An air cylinder 33b is erected in the fixed frame 31 via a mounting base 33b1. The rod 33b2 of the air cylinder 33b is connected to the movable frame 33 via a bracket 33c protruding from the rear surface of the movable frame 33. Note that the bracket 33c penetrates a longitudinally long hole (not shown) formed in the front surface of the fixed frame 31 in the front-rear direction.
[0020]
The upper and lower movable frames 32 and 33 are connected via a ball screw shaft 36. The upper part of the ball screw shaft 36 penetrates the bottom part of the upper movable frame 33 via a bearing 36a so as to be rotatable and cannot move up and down, and the lower part is a ball screw fixed on the lower movable frame 32. Screwed into the member 36b. The upper end of the ball screw shaft 36 is connected to a motor 36d through a pulley 36c1, a timing belt 36c2, and a pulley 36c3. Therefore, the movable frame 33 can be moved up and down relative to the movable frame 32 by rotating the ball screw shaft 36 forward and backward via the motor 36d. However, the air cylinder 33b at this time can substantially eliminate the weight of the movable frame 33 loaded on the ball screw shaft 36 by pushing up the movable frame 33 upward.
[0021]
The rotary blades 34 and 35 are each provided with a plurality of scissors blades that can be moved in and out around the body, and are attached to the movable frames 32 and 33 so as to face the upper and lower sides via bearings 34b and 35b. On the left and right sides of the lower rotary blade 34, a pair of depolarization drive feed rollers 34d and 34d having a pair of mushroom-shaped receiving members 34c and 34c and a bracket 34d1 are disposed. The upstream receiving member 34c and the feed roller 34d are mounted on the fixed table 31b, and the downstream receiving member 34c and the feed roller 34d are mounted on the movable frame 32. A pair of positively driven feed rollers 35 c and 35 c are disposed on the left and right of the upper rotary blade 35. Each feed roller 35c is attached to the lower surface of the movable frame 33 via a swing arm 35c1, and is connected to a motor (not shown).
[0022]
Therefore, the upper and lower rotary blades 34 and 35 can simultaneously cut the upper and lower surfaces of the material W supplied via the feed rollers 15, 15..., And the feed rollers 35 c and 35 c remove the cut material W. It can be discharged behind the double-sided board 30. At this time, it is assumed that the feed rollers 15, 15... Are set to the same height as the feed roller 34d and the receiving member 34c on the upstream side of the double-sided board 30. The lower rotary blade 34 is set via the movable frame 32 so as to be higher than the upstream receiving member 34c by a predetermined height, and the upper rotary blade 35 includes a ball screw shaft 36, a movable A relative distance from the rotary blade 34 is set via the frame 33 so as to match the finished thickness of the material W.
[0023]
A stopper block 37a is attached to the middle part of the front surface of the fixed frame 31 so as to protrude above the movable frame 32 (FIGS. 5 and 6), and the upper surface of the movable frame 32 corresponds to the stopper block 37a. Thus, two types of liners 37b and 37c having different thicknesses are installed so as to freely advance and retract. The liner 37c is thicker than the liner 37b. An adjustment bolt 37a1 is screwed upward into the stopper block 37a, and a lock nut 37a2 is attached to the adjustment bolt 37a1.
[0024]
The liners 37b and 37c are connected to air cylinders 37b1 and 37c1, respectively. The air cylinders 37b1 and 37c1 are installed on the movable frame 32 through a common base plate 37d. Accordingly, each of the liners 37b and 37c can be individually advanced directly below the adjustment bolt 37a1 by extending the corresponding air cylinder 37b1 and 37c1, and by adjusting the air cylinder 37b1 and 37c1 and shortening the adjustment bolt 37a1. Can be removed from directly below.
[0025]
When both liners 37b and 37c are retracted from directly below the adjusting bolt 37a1, the head of the adjusting bolt 37a1 comes into contact with the upper surface of the movable frame 32, so that the rising limit of the movable frame 32 can be set to the highest position. If the liner 37b is advanced just below the adjustment bolt 37a1, the ascending limit of the movable frame 32 can be set lower than the highest position by the thickness of the liner 37b, and the liner 37b is retracted and the liner 37c is advanced. The rising limit of the movable frame 32 can be set lower from the highest position by an amount corresponding to the thickness of the liner 37c. At this time, the movable frame 33 can be linked to the movable frame 32 through the ball screw shaft 36. That is, the stopper block 37a, the adjusting bolt 37a1, the liners 37b and 37c, and the air cylinders 37b1 and 37c1 are set by a setting mechanism 37 for setting the height positions of the rotary blades 34 and 35 via the movable frames 32 and 33 and the ball screw shaft 36. Is configured.
[0026]
An encoder 16 is built in the air cylinder 13 of the measuring mechanism 10 (FIG. 1). However, the encoder 16 can measure the expansion / contraction stroke of the air cylinder 13, that is, the lifting / lowering stroke of the presser roller 12. Therefore, the encoder 16 measures the thickness d of the supplied material W by extending the air cylinder 13 and bringing the presser roller 12 into contact with the upper surface of the material W on the feed rollers 15, 15. The signal S1 can be output.
[0027]
The thickness signal S1 from the encoder 16 is input to the selection circuit 21 of the controller 20, and setting devices 22 and 23 are attached to the selection circuit 21. The outputs of the selection circuit 21 are individually led to the control valves (not shown) corresponding to the air cylinders 37b1 and 37c1 of the setting mechanism 37 as selection signals S2a and S2b.
[0028]
The selection circuit 21 is activated each time a new material W is supplied and the thickness signal S1 from the encoder 16 is input. That is, the selection circuit 21 compares the set thicknesses da and db (da <db) set by the setting devices 22 and 23 with the thickness d of the material W. When d> db, the selection signals S2a and S2b are compared. When da <d ≦ db, the selection signal S2a is output to the air cylinder 37b1 to advance the thin liner 37b directly below the adjustment bolt 37a1, and when d ≦ da, the selection signal S2b is output to the air. The thick liner 37c is advanced directly below the adjustment bolt 37a1 by outputting to the cylinder 37c1. That is, the selection circuit 21 selects the liners 37b and 37c corresponding to the thickness d of the material W to be supplied with the set thicknesses da and db as boundary values, and sets the height positions of the rotary blades 34 and 35. can do.
[0029]
Now, assuming that the maximum allowable cutting amount δm of the rotary blades 34 and 35 (FIG. 7A) and the finished thickness do of the product after cutting, the maximum thickness d = dm of the material W that can be supplied is
dm = do + 2δm
It is. Further, the minimum thickness d = dn of the material W that can take a product having a finished thickness do is dn = do by setting the cutting amounts δ1, δ2 of the rotary blades 34, 35 to δ1 = δ2 = 0. That is, the double-sided board 30 can produce a product having a finished thickness do by cutting the upper and lower surfaces of the material W having a thickness d in the range of dn = do <d≤do + 2δm = dm.
[0030]
On the other hand, in the double-sided board 30, the material W having a thickness d in the range of do + δm <d ≦ dm has a cutting amount δ1 = δm by the lower rotary blade 34 and a cutting amount δ2 by the upper rotary blade 35 = By setting it to 0 to δm, a product having a finished thickness do can be produced. That is, when the thickness d of the material W is do + δm <d ≦ dm, the rotary blades 34, 35 may be set at the highest position without using the liners 37b, 37c (FIG. 7A). Further, when the thickness d of the material W is do <d ≦ d ≦ do + δm, the cutting amount δ1 ≈0 by the lower rotary blade 34 and the cutting amount δ2 = 0˜δm by the upper rotary blade 35 may be set. In this case, a thick liner 37c having a thickness substantially equal to δm may be used ((B) in the figure).
[0031]
However, in this case, the cutting amounts δ1 and δ2 by the rotary blades 34 and 35 are δ1 ≈ 0 and δ2 = δm, and there is a risk that both may be extremely unbalanced. For + .delta.m / 2 <d.ltoreq.do + 3.delta.m / 2, a thin liner 37b having a thickness of about .delta.m / 2 is used (FIG. 5C). That is, the controller 20 can use da = do + δm / 2 and db = do + 3δm / 2 as the set thicknesses da and db.
[0032]
In the above description, the controller 20 uses two or more set thicknesses di (i = a, b...), Two or more selection signals S2i (i = a, b...), Two or more liners 37i (i = A, b ...), the height positions of the rotary blades 34, 35 may be adjusted more finely. That is, the cutting position adjusting device measures the thickness d of the material W to be supplied, and adjusts the height positions of the rotary blades 34 and 35 appropriately, whereby the upper surface of the material W by the rotary blades 34 and 35, The cutting amounts δ1 and δ2 on the lower surface can be suppressed substantially uniformly, and the material W can be finished to a predetermined finish thickness do.
[0033]
[Other embodiments]
The encoder 16 may be provided outside the air cylinder 13 instead of being built in the air cylinder 13 (FIG. 8). A rack 17a is vertically attached to the slide base 14 via a bracket 14c, and a pinion 17b that meshes with the rack 17a is fixed to the shaft end of the encoder 16. When the presser roller 12 is lifted and lowered via the air cylinder 13 and the slide base 14, the encoder 16 measures the lift stroke of the presser roller 12 via the rack 17a and the pinion 17b, and measures the thickness d of the material W. Can do.
[0034]
The encoder 16 may be replaced with a plurality of limit switches 18, 18... (FIG. 9). The limit switches 18, 18... Are arranged vertically below the slide base 14 so as to correspond to the long dog 18a attached to the side end of the slide base 14. The limit switches 18, 18... Operate in order from above when the slide base 14 and the presser roller 12 descend, and output a thickness signal S1i (i = a, b...) According to the thickness d of the material W. The controller 20 can output a predetermined selection signal S2i (i = a, b...) By recognizing the occurrence state of the thickness signal S1i.
[0035]
【The invention's effect】
As described above, according to the present invention, the setting mechanism is configured by combining the measuring mechanism that measures the thickness of the material to be supplied, the controller, and the setting mechanism that sets the height positions of the upper and lower rotary blades. The height position of the rotary blade can be automatically set so that the cutting amount on the upper surface and the lower surface becomes substantially equal without changing the distance between the upper and lower rotary blades according to the thickness of the material. There is an excellent effect that the allowable range of the thickness of the supplied material can be greatly expanded.
[Brief description of the drawings]
1 is a block diagram of the overall configuration. FIG. 2 is a front view of the overall configuration. FIG. 3 is a perspective view of a measuring mechanism. FIG. 4 is a side view of a double-sided board. [Fig. 5] Equivalent view in the direction of the arrow X in Fig. 5 [Fig. 7] Operation explanatory diagram [Fig. 8] Front explanatory diagram of the measuring mechanism showing another embodiment [Fig. 9] Schematic block system diagram showing another embodiment Explanation of]
W ... Material d ... Thickness S1 ... Thickness signal S2i (i = a, b ...) ... Selection signal 10 ... Measuring mechanism 12 ... Pressing roller 13 ... Air cylinder 16 ... Encoder 20 ... Controller 30 ... Double-sided board 34, 35 ... Rotating blade 37 ... Setting mechanism 37b, 37c ... Liner

Claims (3)

A fixed frame, mounted vertically movably on the fixed frame, and the upper and lower movable frame for connecting via the ball screw shaft, against the movable frame under upper and attach to face vertically through bearings respectively A cutting position adjusting device for a double-sided board provided with upper and lower rotary blades, which measures the thickness of a supplied material and outputs it as a thickness signal, and inputs a thickness signal from the measuring mechanism Each time, the controller compares the set thickness with the material thickness and outputs a plurality of selection signals, and selects a liner for setting the upper limit of the lower movable frame in accordance with the selection signals from the controller. A double-sided board comprising a setting mechanism that automatically sets the height positions of the upper and lower rotary blades so that the cutting amounts of the upper and lower surfaces of the material become substantially equal without changing the interval between the rotary blades Definitive cutting position adjusting device.   The double-sided scissors according to claim 1, wherein the measuring mechanism includes a pressing roller that presses the material, an air cylinder that drives the pressing roller to move up and down, and an encoder that measures the lifting stroke of the pressing roller. Cutting position adjusting device for the board.   The cutting position adjusting device for a double-sided board according to claim 1 or 2, wherein the setting mechanism selects one of a plurality of liners having different thicknesses.

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