JP3172515B2 - Log paper clamp device for log paper cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a log paper clamping device for a log paper cutting device. The log paper is obtained by winding the paper into a log shape, and when this paper is cut into a predetermined length, it becomes toilet paper or kitchen roll paper. Generally, paper made by a paper machine is wide and is wound by a winder as it is to a large diameter (about 2 to 4 m in diameter). The large-diameter roll paper is rewound to a small diameter (for example, φ100 to φ120 mm for toilet paper, approximately φ110 to φ130 mm for kitchen roll paper, etc.), and the log paper is elongated with a small diameter. A log paper cutting device cuts this log paper at intervals of 100 to 114 mm to make toilet paper, or cuts it at intervals of about 220 to 230 mm to finish it as kitchen roll paper.

[0002]

2. Description of the Related Art As a conventional log paper cutting device, there is one disclosed in Japanese Patent Application Laid-Open No. 4-209156. The basic structure thereof will be described with reference to FIG. Reference numeral 101 denotes two circular saws, which are rotatably attached to the tip of a rotor arm 102, and are rotated at high speed by a motor or the like. The rotor arm 102 is rotatable about an axis 103,
It is designed to be rotated by a motor or the like. Thus, the circular saw 101 revolves while rotating. Then, for example, two log papers R placed in parallel on the transport table and transported intermittently in the horizontal direction are clamped by the log paper clamp devices at the front and rear portions in the transport direction below the circular saw 101, respectively. As described above, the operation of cutting into products (such as toilet paper) P of a fixed length by the circular saw 14 that rotates while revolving as described above is repeated.

A conventional log paper clamp device includes a pair of lower support pieces capable of supporting both lower side surfaces of log paper R to be supported intermittently conveyed, a pressing piece for pressing the upper surface of the log paper, A cam mechanism capable of manually adjusting an opposing interval between the pair of lower support pieces according to a diameter dimension of the log paper, a cam mechanism capable of manually adjusting a height position of the pressing piece, and It comprises a control device that operates the two cam mechanisms in conjunction with the intermittent transport operation, and controls the log paper clamp operation / clamp release operation by the pressing piece.

[0004]

However, the prior art has the following problems. (1) When adjusting the facing distance between a pair of lower support pieces, fine adjustment is performed by manual operation, so that a skilled operator is required to be performed, which requires much labor and increases production cost. (2) When it is necessary to adjust the facing distance between the pair of lower support pieces due to the change of the production lot, it is necessary to stop the operation of the log paper cutting device and perform the adjustment. In addition, the adjustment time is long, the operation rate is reduced, and the production cost is increased. (3) During operation of the log paper cutting device, the facing distance between the pair of lower support pieces is fixed, and the friction between the pair of lower support pieces and the log paper R is large. Is pushed out in the transport direction by the log paper R intermittently transported.

In view of such circumstances, the present invention reduces the resistance when a product cut to a certain length from log paper is pushed out in the transport direction by the log paper, and a pair of lower portions capable of supporting both lower side surfaces of the log paper. The opposing spacing of the support pieces and the height position of the holding pieces that hold the top surface of the log paper can be automatically controlled at the same time. It is an object of the present invention to provide a log paper clamping device of a log paper cutting device capable of improving the rate.

[0006]

According to a first aspect of the present invention, there is provided a log paper clamping apparatus for intermittently clamping a log paper placed and conveyed on a carrier. (A) a pair of lower supporting pieces capable of supporting the lower side surfaces of the log paper conveyed in the horizontal direction; and (b) a pair of driving means for opening and closing the facing gap between the pair of lower supporting pieces. And (c) a pressing piece capable of pressing the upper surface of the log paper, and (d) a pressing piece driving mechanism for holding the pressing piece and driving the tip thereof up and down. (E) a pair of cams for driving the pair of lower support piece driving mechanisms, (f) a cam for driving the presser piece driving mechanism, and (g) interlocking each of the cams with the transport operation of the log paper. Te A cam drive mechanism for driving the, (h)
A reference value control mechanism for commonly setting and controlling the reference state of each of the cams, and (i) a control motor for driving and controlling the reference value control mechanism. The log paper clamping device of the log paper cutting device according to claim 2,
In the invention according to claim 1, each of the pair of lower support piece driving mechanisms includes: (b1) a cam roller pressed in the horizontal direction by a cam; (b2) a transmission lever to which the cam roller is attached; and (b3) The transmission lever and one end are rotatably connected, the intermediate part is rotatably supported in a vertical plane at a fixed position, and the other end is swingable, and the other end of the pair of lower support pieces is (B4) a swing spring to which one lower support piece is attached, and (b4) a coil spring for urging one of the lower support pieces in an opening direction, wherein the pair of lower support pieces is The pair of lower support pieces are driven in opposite directions by a drive mechanism cam to reduce the distance between the pair of lower support pieces and to be clamped. According to a third aspect of the present invention, there is provided the log paper clamping apparatus of the first aspect, wherein the pressing piece driving mechanism comprises: (d1) a cam roller that is driven by a cam in a horizontal direction; and (d2) the cam roller. (D3) a rotating lever having an intermediate portion rotatably supported in a vertical position at a fixed position in a vertical plane, and a cam follower attached to the other end, and (d3) one end contacting the cam follower. ,
A swing lever having an intermediate portion rotatably supported in a vertical plane at a fixed position and a base end of the holding piece attached to the other end; and (d4) a holding piece for holding the other end of the swing lever. And a spring for urging in a downward direction.
The log paper clamping device of the log paper cutting device according to the fourth aspect is the invention according to the first aspect, wherein the cam driving mechanism comprises: (g1) a cam shaft rotatably held in a horizontal direction; and (g2) the cam. (G3) a plurality of pulleys attached to one end of the shaft and rotatably driven in conjunction with the transport operation of the log paper; And (g4) a plurality of cams provided on the respective outer cylindrical portions of the plurality of ball spline holders.
According to a fifth aspect of the present invention, in the log paper clamping apparatus according to the fourth aspect, the reference value control mechanism comprises: (h1) a screw shaft driven by the control motor; and (h2) the screw shaft. Two drive pieces screwed to a shaft, rotatably holding the pair of lower support piece opening / closing cams, and moving in a direction approaching or separating from each other by rotation of the screw shaft in a certain direction;
(H3) two drive pieces screwed to the screw shaft, rotatably holding the holding piece opening / closing cam, and moving in directions approaching or separating from each other by rotation of the screw shaft in a certain direction. It is characterized by having.

According to a sixth aspect of the present invention, there is provided a log paper clamping apparatus for a log paper cutting apparatus, wherein two log papers placed on a transport table and transported in parallel in the horizontal direction are spaced at a predetermined interval in the log transport direction. A log paper clamp device for a log paper cutting device having four log clamp mechanisms corresponding to four places intermittently clamped at adjacent positions, wherein each of the four log clamp mechanisms is:
(A1) a pair of lower support pieces capable of supporting both lower side surfaces of the conveyed log paper; and (a2) a pair of lower support piece drives for driving the pair of lower support pieces so as to control the facing distance. A mechanism, (a3) a holding piece capable of holding the upper surface of the log paper, and (a4) a holding piece driving mechanism that holds the holding piece and drives the tip to control the tip, Further, (b) a pair of cams for commonly driving and controlling each pair of lower support piece driving mechanisms of the four log clamp mechanisms, and (c) two cams of the same transport row in the four log clamp mechanisms. A pair of cams for commonly driving and controlling the driving mechanism of the holding piece; (d) a cam driving mechanism for commonly driving each of the cams in conjunction with the transporting operation of the log paper; and (e) a reference state of each of the cams. To control the settings And Jun'ne control mechanism, and having a control motor for controlling driving (f) the reference value control mechanism.

According to the first aspect of the present invention, the pair of lower support pieces can be opened and closed by the pair of lower support piece driving mechanisms interlocked with the transport operation of the log paper. The height position can be raised and lowered. Therefore, compared to the conventional example in which only the pressing piece is controlled, the resistance when pushing out the product cut from the log paper to a fixed length in the transport direction can be reduced. In addition, at the time of initial setting of the log paper clamp device, the reference value control mechanism is driven and controlled by the control motor, and the initial state of each cam can be commonly set and controlled. Angle) and the initial state of the height position of the tip of the holding piece can be automatically adjusted simultaneously. Therefore, it is possible to reduce the production cost by labor saving of the operator for the clamp adjustment and to improve the operation rate by automating the adjustment.
Further, since the log can be reliably clamped from three directions by the pair of lower support pieces and the holding piece, the log can be cut vertically without diagonal cutting to reduce defective products. According to the invention of claim 2, each of the lower support piece driving mechanisms can drive-control the transmission lever and the swing lever by driving-controlling the cam roller in the horizontal direction by the cam. The swinging position of the swinging lever and thus the facing distance between the pair of lower support pieces can be controlled. Moreover, since the clamping operation by the pair of lower support pieces is achieved by the rigid body of the cam and the cam roller, the pair of lower support pieces do not move due to the reaction force at the time of cutting the log, and the log can be stably cut. . According to the third aspect of the present invention, the holding piece driving mechanism can move the rotating lever and the swinging lever by contact between the cam and the cam roller to lower the holding piece and perform unclamping. The piece can be clamped. In addition, since the pressing piece is lowered by the urging force of the spring, the soft log can be sufficiently tightened and securely clamped. According to the fourth aspect of the present invention, the cam driving mechanism is configured such that the cam driving mechanism is mounted on the ball spline holder movably mounted in the camshaft axial direction along the outer peripheral portion of the camshaft driven in conjunction with the transport operation of the log paper. Is fixed, it is possible to variably control the interval between the pair of lower support pieces and the height position of the holding pieces while transmitting the driving force of the camshaft to the cam. According to the invention of claim 5, the reference value control mechanism moves the pair of driving pieces toward and away from each other by forward and reverse rotation of the screw shaft driven by the control motor, so that the lower supporting piece opening / closing cam is opened and closed. The interval can be opened and closed along the camshaft axial direction, and the position of each cam in the camshaft axial direction can be changed to set and control the reference value of the facing interval between the pair of lower support pieces. Similarly, the cam for opening and closing the holding piece can be moved in the camshaft axial direction by the forward and reverse rotation of the screw shaft, so that the reference value of the height position of the tip of the holding piece can be variably set. it can.

According to the sixth aspect of the present invention, two log papers, which are placed on a carrier and conveyed in parallel in the horizontal direction, are intermittently arranged at adjacent positions at a predetermined interval in the log transport direction. The lower support piece drive mechanism and the holding piece drive mechanism can be commonly controlled by cams for the four log clamp mechanisms provided corresponding to the four locations to be clamped, and the reference state of each cam is controlled. Since the setting and control can be commonly performed by the motor and the reference value control mechanism, the four log clamp mechanisms can be accurately synchronized.
Therefore, two log papers that are placed on the transport table and transported in parallel in the horizontal direction are adjacent to each other at a predetermined interval in the log transport direction (for example, before and after the log cutting unit).
Can be intermittently clamped simultaneously, and the overall configuration of the log paper clamping device can be simplified.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a log paper cutting device provided with a log paper clamp device according to a first embodiment of the present invention. Hereinafter, log paper is abbreviated as log.

In FIG. 1, a rotor arm 11 has a central portion held by a rotating shaft 12 provided in a horizontal direction, and the rotating shaft 12 is rotated by a motor or the like to be rotatable in a vertical plane. Has become. Two circular saws 14
Are rotatably mounted on shafts 13 rotatably held at both ends of the rotor arm 11 in a horizontal direction, respectively.The shaft 13 is rotated at a high speed by a motor or the like, so that the shaft 13 is rotatable in a vertical plane. It has become. Therefore, 2
The circular saws 14 can be rotated (rotated) at high speed in a vertical plane while being rotated (revolved) by the rotor arm 11. Then, the logs R, which are placed in parallel on the carrier table and conveyed intermittently in the horizontal direction, for example, are
In a state clamped by the log clamp device below the above, the operation of cutting into products (such as toilet paper) P of a fixed length by the circular saw 14 revolving while rotating as described above is repeated. In this case, the two logs R are clamped by the log clamp device 20 at the front and rear portions in the transport direction below the circular saw 14.

FIG. 2 is a partially sectional front view of the log clamp device 20 shown in FIG. FIG. 3 is a partially sectional front view showing the unclamped state of the log clamp device 20. The log clamp device shown in FIG. 2 and FIG. 3 corresponds to the right and left clamp mechanisms adjacent to each other in parallel corresponding to two logs R and the front and rear clamp mechanisms adjacent to each other at a predetermined interval in the log transport direction (row direction). And a total of four log clamp mechanisms. Each of the four log clamp mechanisms includes a pair of left and right lower support pieces 21, a pair of lower support piece driving mechanisms,
One holding piece 22 and one holding piece driving mechanism are provided.

FIG. 4 is a plan view showing four sets of a pair of lower support pieces 21 in FIGS. 2 and 3. Lower support piece 21 of each pair
Has a curved shape capable of supporting both lower side surfaces of the log R conveyed in the horizontal direction. As shown in FIGS. 2 and 3, the tip of the holding piece 22 has a curved shape capable of holding the upper surface of the log R. As shown in FIG. 2, a camshaft 31 is disposed horizontally below the log clamp mechanism.
A pair of first cams 341 for commonly driving and controlling each pair of lower support piece driving mechanisms in the four log clamp mechanisms.
, 342 are mounted, and a pair of second cams 381, 382 for driving the drive mechanism of the two holding pieces 22 in common are mounted on both ends of the camshaft 31. further,
In order to drive and control the four log clamp mechanisms in common, a cam drive mechanism for commonly driving each of the cams in conjunction with the transporting operation of the log paper and a reference state (initial state) of each cam are described. A reference value control mechanism for setting and controlling;
A control motor 23 for driving and controlling the reference value control mechanism is provided.

The cam driving mechanism includes a cam shaft 31 and
A pulley 32 attached to one end of the camshaft 31
And first to fourth ball spline holders 331 to 334 attached along the outer peripheral portion of the camshaft 31. These ball spline holders 331-334
The inner cylinder is fixed to the camshaft 31, and the outer cylinder slides in the axial direction. The pulley 32 is wound around a timing belt or the like that is intermittently driven in conjunction with the intermittent feeding operation of the log R in the log paper cutting device, and the camshaft 31 rotates intermittently in synchronization with the intermittent feeding of the log R. Has become.

The pair of first and second cams 341 and 342 are cylindrical cams, and are two of the first to fourth ball spline holders.
The cam portion 34a is fixed to the flange of the outer cylinder of the 331 and the second ball spline holder 332 and is driven to rotate integrally with the camshaft 31, and a cam portion 34a is protruded from a cylindrical outer peripheral surface portion. The height of the cam portion 34a changes along the circumferential direction, and moves the cam rollers 351 and 352 in the horizontal direction (left and right in the drawing).

The pair of third and fourth cams 381 and 382 are also cylindrical cams, and are two of the first to fourth ball spline holders.
It is fixed to the flange of the outer cylinder of the 333 and the fourth ball spline holder 334 and is driven to rotate integrally with the camshaft 31. A cam portion 38a is protruded from the cylindrical outer peripheral surface. The height of the cam portion 38a changes along the circumferential direction, and moves the cam rollers 393 and 394 in the horizontal direction (left and right in the drawing).

FIG. 5 is a plan view of a pair of lower support piece driving mechanisms. FIG. 6 is a side view showing the lower support piece driving mechanism in FIG. In FIGS. 2 and 3 and FIGS. 5 and 6, each of the four sets of front and rear, right and left clamp mechanisms is a pair of lower support pieces on the left and right sides.
The first lower support piece driving mechanism for correspondingly driving the lower support piece on the right side thereof includes the first lower support piece driving mechanism.
The cam 341 is configured to be in contact with the side surface of the cam portion 34a, and to swing the right lower support piece according to the shape of the side surface. That is, a first roller 351 which comes into contact with the side surface of the cam portion 34a of the first cam 341 and is pushed in the horizontal direction according to the shape of the side surface, and a U-shape in plan view to which the first roller 351 is attached. A first transmission lever 361, and the first transmission lever 361 and one end thereof are rotatably connected by a pin 36a;
The intermediate portion is swingably supported by the fixed frame 47 by pins 37a, and the other end has a first swing lever 371 to which the upper end of the right lower support piece 21 is attached.

On the other hand, the left and right pair of lower support pieces
The second lower support piece driving mechanism for correspondingly driving the left lower support piece of 21 is provided on the side surface of the cam portion 34a of the second cam 342 in accordance with the above-described first lower support piece drive mechanism. A second roller 352 which is in contact with and is pushed in the horizontal direction according to the shape of the side surface thereof; a second transmission lever 362 having a U-shape in plan view to which the second roller 352 is attached;
2 and one end thereof are rotatably connected by a pin 36b, and the intermediate portion is rotatably supported by a fixed frame 47 by a pin 37b,
The other end has a second swing lever 372 to which the upper end of the lower support piece 21 is attached. However, the driving direction of the roller 352 and the transmission lever 362 and the rotation direction of the swing lever 372 are opposite to the roller 351, the transmission lever 361 and the swing lever 371 of the first lower support piece driving mechanism.

The first lower support piece driving mechanism of the four clamp mechanisms includes a first transmission lever 36 having a substantially U-shaped plane.
1 is shared. That is, the four first swing levers 37
1 are rotatably supported by the pins 36a at the four corners, so that the same operation is performed. The second lower support piece driving mechanism also shares the second transmission lever 362 having a substantially U-shape in plan view. That is, the four second swing levers 372 are rotatably supported by the pins 36b at the four corners, respectively, so that the same operation is performed.

By the first and second lower support piece driving mechanisms having the above-described configurations, each of the four pairs of lower support pieces 21 is driven by the respective lower support pieces 21 being driven in opposite directions to each other. The facing interval (opening / closing angle) of the support pieces 21 is controlled to be opened and closed. Further, the tension spring 30 which urges the first transmission lever 361 and the second transmission lever 362 in a direction in which the first transmission lever 361 and the second transmission lever 362 are attracted, that is, a direction in which the distance between the lower ends of the first and second pivoting levers 371 and 372 is reduced. Installed. This tension spring 30 is connected to a first transmission lever 36.
1 has a role of pressing the first cam 341 against the roller 351 and a role of pressing the roller 352 mounted on the second transmission lever 362 against the second cam 342. When the clamped state of R is released, it has a role of urging the pair of lower support pieces 21 in a direction of increasing the facing distance.

According to the first and second lower support piece driving mechanisms, the first and second rollers 351 and 352 are connected to the first and second cams 341.
, 342 is not pressed, as shown in FIG.
The first and second swing levers 371 are extended by the tension spring 30.
, 372 are pulled toward each other and the upper ends are opened, so that the pair of lower support pieces 21, 21 are in an unclamped state. As shown in FIG. 2, the camshaft 31 rotates from the above state, and the first and second cams 341 and 342 move to the first and second positions.
When the second rollers 351 and 352 are pushed, the first and second swing levers are pushed.
The lower ends of 371 and 372 are open, and the upper ends are closed. By this operation, each pair of lower support pieces 21, 21 clamps the log R. This clamp state
First and second cams 341 and 342 and first and second rollers 351 and 35
2 is held by the mechanical contact, the pair of lower support pieces 21 and 21 do not open even if an external force pushing in the lateral direction is applied during the cutting of the log R, which is far more than clamping with a spring. A stable clamping operation can be performed. Therefore, troubles such as the cut surface of the log being broken or becoming oblique do not occur, and the yield of non-defective products is improved.

FIG. 7 is a plan view showing four holding pieces 22 and a part of the holding piece driving mechanism. FIG. 8 is a side view of two holding piece driving mechanisms in the same transport row. 2 and 3 and FIGS. 7 and 8, the pressing piece driving mechanism for operating the right pressing piece 22 in FIG. 2 is in contact with the side surface of the cam portion 38a of the third cam 383 and presses the pressing member according to the shape of the side surface. The one end of the piece 22 is swung so as to control the height position of the tip, that is, it is in contact with the side surface of the cam portion 38a of the third cam 383, and is horizontal depending on the shape of the side surface. A third roller 393 which is pushed in a direction, and the third roller 393 is attached to one end, and an intermediate portion is rotatably supported in a vertical plane by a pin 40a held by a fixed frame 501, and the other end. A third follower lever 401 having a U-shape in front view and having a cam follower 411 attached thereto, one end of which comes into contact with the cam follower 411, and an intermediate portion rotatably supported by a pin 42a at a fixed position. A third swing lever 421 having a base end of the holding piece 22 attached to the end. Have. Since two sets of pressing member driving mechanisms for the two pressing members 22 in the right conveying row in FIG. 2 share the U-shaped rotating lever 401 when viewed from the front, the two sets of pressing members are used. Piece 22 operates similarly.

The other end of the swing lever 421 (pressing piece 22
A third extension spring 431 is attached to the base end of the third extension spring 431. The coil spring 431 has a role of urging the pressing piece 22 in a direction of pressing the pressing piece 22. Further, a coil spring 46 for urging the rotating lever 401 downward is attached. This coil spring 46 has a rotating lever
It has a role to press the roller 391 attached to the 401 against the second cam 381.

According to the holding member driving mechanism having the above-described structure, the holding member 22 is always in the clamp position where the third extension spring 431 presses the log R. And the camshaft
When 31 rotates and the third cam 383 pushes the third roller 393,
The third pivoting lever 401 swings to rotate the third swinging lever 421 against the third tension spring 431 to open the holding piece 22 upward. As a result, unclamping is performed.

The pressing piece driving mechanism for operating the pressing piece 22 on the left side in FIG. 2 is also configured in accordance with the above-described configuration, and is in contact with the side surface of the cam portion 38a of the fourth cam 384, according to the shape of the side surface. Roller 394 that is pushed horizontally in the vertical direction, and this fourth roller 394 is attached to one end, and an intermediate portion is rotatable in a vertical plane by a pin 40b held by a fixed frame (not shown). Supported, cam follower on other end
The cam follower 412 has one end in contact with a fourth pivoting lever 402 to which the 412 is attached, an intermediate portion rotatably supported by a pin 42b at a fixed position, and a holding piece at the other end.
It has a fourth swing lever 422 to which the base end of the 22 is attached, a fourth spring 432, and a fourth coil spring (not shown) for urging the fourth rotation lever 402 having a U-shape in a front view.

Then, the front and rear 2 in the left conveying row in FIG.
Since two sets of the pressing piece driving mechanisms for the pressing pieces 22 share the U-shaped rotation lever 402 when viewed from the front, two sets of front and rear pressing pieces 22 operate in the same manner. However, the fourth roller 392
The driving direction of the fourth pivoting lever 402 and the pivoting direction of the fourth pivoting lever 422 are opposite to those of the third roller 391, the third pivoting lever 401, and the third pivoting lever 421 of the above-described pressing piece driving mechanism. It is. The holding piece 22 on the right side in FIG.
The clamp / unclamp operation is performed in the same manner as the middle right holding piece 22.

Next, a reference value control mechanism for setting and controlling the reference state (initial state) of each cam will be described.
This reference value control mechanism is, as shown in FIG.
And a first drive piece 451 screwed to the left-hand threaded portions 441 and 443 of the screw shaft 44.
And a third drive piece 453, and a second drive piece 452 and a fourth drive piece 454 screwed into the right screw portions 442, 444 of the screw shaft 44. In this case, the rotation direction and the rotation amount of the control motor 23 can be set by a touch operation on a control panel (not shown). The two drive pieces 452 screw in opposite directions. In other words, the distance between them is increased or decreased. Similarly, the third driving piece 452 and the fourth driving piece 454 also screw in opposite directions. That is, the distances between them are increased or decreased.

Then, the second driving piece 451 is connected to the first cam
The second drive piece 452 rotatably holds the cylindrical outer peripheral surface of the second cam 342. The first cam 341 and the second cam 34
2 can be moved in the axial direction by the ball spline holders 331 and 332, so that the first driving piece 451 and the second
The movement of the driving piece 452 causes the first and second cams 341 and 342 to move.
Can be opened and closed, and the initial value of the facing distance between the pair of lower support pieces 21 can be set and controlled. Similarly, the third driving piece 453 is
The cylindrical outer peripheral surface of the third cam 383 is rotatably held, and the fourth driving piece 454 rotatably holds the cylindrical outer peripheral surface of the fourth cam 384. The third cam
383 and the fourth cam 384 are also ball spline holders 333,
334, the third drive piece 453 and the fourth drive piece 454 are connected to the third and fourth cams 383,
The gap between the 384 camshafts 31 can be opened and closed, and the initial value of the height position of the tip of each holding piece 22 can be variably set.

The operation of the log clamp apparatus having the above configuration is as follows. First, at the time of initial setting (reference value setting), a one-touch operation of the control panel is performed in accordance with the specified diameter R of the log R.
The control motor 23 is driven to rotate by a predetermined amount in a predetermined direction by a predetermined number of counts. Thereby, the screw shaft 44 rotates by a predetermined amount in a predetermined direction, and the first driving piece 451
, The second drive piece 452, the third drive piece 453, and the fourth drive piece 454 move forward or backward by a predetermined amount, and the cams 341, 342, 38
The reference value (initial value) of the position in the camshaft axial direction of 3,383 is set and controlled.

Thus, the pair of first and second cams 341 and 34 are provided.
To increase the distance between the two in the axial direction of the camshaft,
Narrowing, setting an initial value, setting an initial state of the pair of lower support piece driving mechanisms, and setting a reference value of an interval between each pair of lower support pieces 21 (a lower support piece corresponding to the size of the diameter of the log R). (Interval distance) can be set and controlled. Further, the distance between the third and fourth cams 383 and 384 in the axial direction of the camshaft is increased or decreased to set an initial value, to set an initial state of each holding piece driving mechanism, and to set each holding piece 22 It is possible to set and control the reference value of the height position (the lower support piece facing distance according to the diameter of the log R). At this time, if the diameter φ of the log R is, for example, 110 mm, the facing distance between the pair of lower support pieces 21 is approximately 110 mm, and the height of the holding piece 22 is at a position substantially coincident with the upper surface of the log R.

During the operation of the log cutting device, the log R
Camshaft via pulley 32 in conjunction with the
When the rotation of 31 is performed, the first and second cams for driving the support pieces are provided.
341 and 342 and third and fourth cams 383 for driving the holding pieces
, 384 are respectively driven. As a result, each of the lower support piece driving mechanisms and each of the presser piece drive mechanisms are driven, and the opposing distance between the pair of lower support pieces 21 and the presser pieces 22 are controlled.
Is automatically controlled to open and close, so that the pair of lower support pieces 21 and holding pieces 22 intermittently repeat the log clamping / unclamping operations. At this time, in the clamped state of the log R as shown in FIG.
A value slightly smaller than (110 mm in this example) (for example, 106 mm)
And the pressing piece 22 presses the upper surface of the log R.

On the other hand, in the unclamped state (unclamped state) of the log as shown in FIG. 3, the distance between the pair of lower support pieces 21 is slightly larger than the diameter φ of the log R (for example, 114 mm). And the holding piece 22 is separated from the upper surface of the log R. Therefore, according to the log clamp apparatus having the above configuration, the first and second cams 341 and 342 and the third and fourth cams 383 and 384 are commonly driven by the cam drive mechanism in conjunction with the log transport operation. Third and fourth cams 383 and 384 make it possible to raise the tip of the holding piece 22, and the first and second cams 341 and 342 make it possible to widen the distance between the pair of lower support pieces 21.
The resistance at the time of pushing the product P cut to a certain length from the log R in the transport direction by the log R can be reduced.

Further, at the time of initial setting of the log clamp device, the reference value control mechanism is driven and controlled by the control motor 23 so that the reference position of each cam can be commonly set and controlled. The initial state of the opposing interval and the height position of the tip of the holding piece 22 can be automatically and simultaneously adjusted. Therefore, it is possible to reduce the production cost by labor saving of the operator for the clamp adjustment and to improve the operation rate by automating the adjustment. In the above-described embodiment, the log cutting device using the circular saw has been described, but the configuration of the log cutting device itself is not limited.

[0034]

According to the first aspect of the present invention, it is possible to reduce the resistance when pushing out a product cut to a certain length from log paper in the conveying direction, and to reduce the opposing interval between the pair of lower support pieces and the pressing force. The initial state of the height position of the tip of the piece can be automatically adjusted, and the log can be cut vertically without diagonal cutting to reduce defective products.
According to the second aspect of the present invention, since the clamping operation is performed by pressing the cam roller with the cam, the pair of lower support pieces do not move due to the reaction force at the time of log cutting, so that the log can be stably cut. . According to the invention of claim 3,
Since the holding piece is lowered by the urging force of the coil spring, the soft log can be sufficiently tightened and securely clamped. According to the fourth aspect of the invention, it is possible to variably control the distance between the pair of lower support pieces and the height position of the holding pieces while transmitting the driving force of the cam shaft to the cam. According to the fifth aspect of the present invention, the reference value of the interval between the pair of lower support pieces can be set and controlled by changing the position of each cam in the axial direction of the cam by the control motor, and the height of the tip of the holding piece can be controlled. The reference value of the position can be set variably. According to the invention of claim 6, the four log clamp mechanisms can be accurately synchronized, and the two log papers placed on the carrier and conveyed in parallel in the horizontal direction are intermittently simultaneously. Can be clamped,
The overall configuration of the log paper clamp device can be simplified.

[Brief description of the drawings]

FIG. 1 is a side view of a log paper cutting device provided with a log paper clamp device according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional front view of the log clamp device 20 shown in FIG.

FIG. 3 is a partially sectional front view showing an unclamped state of the log clamp device 20.

FIG. 4 is a plan view showing four sets of a pair of lower support pieces 21 in FIGS. 2 and 3;

FIG. 5 is a plan view of a pair of lower support piece driving mechanisms.

FIG. 6 is a side view showing a lower support piece driving mechanism in FIG. 5;

FIG. 7 is a plan view showing four holding pieces 22 and a part of a holding piece driving mechanism.

FIG. 8 is a side view of two holding piece driving mechanisms in the same conveyance row.

FIG. 9 is a schematic front view of a conventional log paper cutting device.

[Explanation of symbols]

 R Log paper 21 A pair of lower support pieces 22 Pressing pieces 23 Control motor 31 Camshaft 32 Pulley 44 Screw shaft 331 to 334 Ball spline holder 341 First cam 342 Second cam 383 Third cam 384 Fourth cam 441 Left thread 442 Right thread 443 Left thread 444 Right thread

Continuation of front page (56) References JP-A-59-232794 (JP, A) JP-A-62-172598 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B26D 1 / 00-11/00

Claims (6)

(57) [Claims] 1. A log paper clamping device for intermittently clamping a log paper placed and transported on a transport table, wherein: (a) lower side surfaces of the log paper transported in a horizontal direction; (B) a pair of lower support piece driving mechanisms for driving the pair of lower support pieces to open and close the facing gap therebetween, and (c) pressing the upper surface of the log paper. (E) a pair of cams for driving the pair of lower support piece driving mechanisms; (d) a holding piece driving mechanism for holding the holding piece and driving the tip thereof up and down. When,
(F) a cam for driving the holding piece driving mechanism;
A cam drive mechanism for commonly driving each of the cams in conjunction with the transport operation of the log paper; (h) a reference value control mechanism for commonly setting and controlling a reference state of each of the cams;
A log paper clamping device for a log paper cutting device, comprising: a control motor for driving and controlling the reference value control mechanism. Each of the pair of lower support piece driving mechanisms includes: (b1) a cam roller pressed in the horizontal direction by a cam; (b2) a transmission lever to which the cam roller is attached; and (b3) a transmission lever. And one end portion are rotatably connected, the intermediate portion is rotatably supported in a vertical plane at a fixed position, and the other end portion is swingable, and the lower portion of one of the pair of lower support pieces is A swing lever with a support piece attached,
(B4) a coil spring for urging one of the pair of lower support pieces in the opening direction, and the coil spring being driven in opposite directions by the pair of lower support piece driving mechanism cams. 2. The log paper clamping device for a log paper cutting device according to claim 1, wherein said lower support piece is clamped by narrowing an opposing interval between said lower support pieces. 3. The pressing piece driving mechanism includes: (d1) a cam roller that is pressed and driven by a cam in a horizontal direction;
A rotating lever having a cam roller attached to one end thereof, an intermediate portion rotatably supported in a vertical position in a fixed position, and a cam follower attached to the other end; and (d3) one end of the cam follower. A swinging lever having an intermediate portion rotatably supported in a vertical plane at a fixed position and having a base end of the holding piece attached to the other end; and (d4) the other end of the swinging lever. 2. A log paper clamping device for a log paper cutting device according to claim 1, further comprising: a spring for urging the pressing member in a downward direction of the holding piece. 4. The cam drive mechanism comprises: (g1) a cam shaft rotatably held in a horizontal direction; and (g2) attached to one end of the cam shaft, and interlocked with a log paper transport operation. A rotationally driven pulley, and (g
3) a plurality of ball spline holders mounted so as to be movable in the camshaft axial direction along the outer peripheral portion of the camshaft; and (g4) a plurality of ball spline holders provided on respective outer cylindrical portions of the plurality of ball spline holders. 2. The log paper clamping device for a log paper cutting device according to claim 1, further comprising: 5. The reference value control mechanism includes: (h1) a screw shaft driven by the control motor; and (h2) a screw shaft that is screwed to the screw shaft, the cam for opening and closing the pair of lower support pieces. (H3) screwed to the screw shaft, the two driving pieces moving in the direction of approaching or moving away from each other by rotation of the screw shaft in a certain direction; 5. The log of the log paper cutting device according to claim 4, further comprising two driving pieces that rotatably hold the cam and move in a direction approaching or moving away from each other by rotation of the screw shaft in a certain direction. Paper clamp device. 6. A method in which two log papers, which are placed on a carrier table and conveyed in parallel in the horizontal direction, are intermittently clamped at adjacent positions at predetermined intervals in the log transport direction. And a log paper cutting device of a log paper cutting device having four log clamp mechanisms, wherein each of the four log clamp mechanisms (a1) supports lower side surfaces of the conveyed log paper. A pair of possible lower support pieces, (a2) a pair of lower support piece driving mechanisms for driving the pair of lower support pieces to control the facing distance, and (a3) the upper surface of the log paper can be pressed. (A4) a holding piece driving mechanism for holding the holding piece and driving the tip of the holding piece, and (b) a pair of each of the four log clamp mechanisms. A pair of cams for driving and controlling the lower support piece driving mechanism in common; and (c) a pair of cams for commonly driving and controlling the driving mechanism of two holding pieces in the same transport row in the four log clamp mechanisms. (D) a cam drive mechanism for driving each of the cams in common in conjunction with the transport operation of the log paper;
(E) a reference value control mechanism for setting and controlling the reference state of each cam, and (f) a control motor for driving and controlling the reference value control mechanism. Paper clamp device.