JP3576362B2 - Head positioning device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head positioning device provided in a slitter scorer of a corrugating machine, which conveys a head such as a slitter knife and a ruled line call and positions the head.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known an automatic slitter scorer which is provided in a corrugating machine and performs cutting and crease processing on a continuously fed corrugated cardboard web in a traveling direction. FIG. Is shown.
As shown in FIG. 3, a corrugating machine is usually provided with two auto-slitting scorers 20A and 20B. Each of the auto-slitting scorers 20A and 20B has a cutting portion 21 and a ruled portion 22, respectively. Cutting and crease processing are performed by a cutting unit 21 and a crease unit 22.
[0003]
4 and 5 are views showing the configuration of the cutting section 21 and the crease section 22, respectively. First, as shown in FIG. 4, the cutting section 21 is provided corresponding to the upper and lower sides of the corrugated cardboard web 30. It is composed of shafts for rotating the heads (slitter shafts) 23a and 23b, heads 35a and 35b supported by the slitter shafts 23a and 23b, and slitter knives 25a and 25b fixed to the heads 35a and 35b. The corrugated cardboard web 30 fed along the guide 31 shown in FIG. 3 is cut between slitter knives 25a and 25b.
[0004]
On the other hand, as shown in FIG. 5, the crease section 22 includes head rotation driving shafts (ruled line roll shafts) 24a and 24b provided corresponding to the upper and lower portions of the corrugated cardboard web 30, and respective ruled line roll shafts 24a and 24b. It is composed of pivotally supported heads 36a and 36b and ruled line rolls 26a and 26b fixed to the heads 36a and 36b. The ruled line rolls 26a and 26b are formed with convex and concave outer peripheral surfaces, respectively, and mesh with each other so as to perform predetermined scoring on the corrugated cardboard web 30.
[0005]
The above-mentioned heads 35a, 35b, 36a, 36b are arranged at predetermined positions on the slitter shafts 23a, 23b and the ruled roll shafts 24a, 24b by a required number according to the shape of the corrugated cardboard sheet to be manufactured. Can be done. In FIG. 6, three sets of cutting sections 21a, 21b, 21c and four sets of scoring sections 22a, 22b, 22c, 22d are installed (in FIG. 6, the installation center of each cutting section, scoring section is indicated by a black dot). FIG. 4 is a plan view showing a processing state of the corrugated cardboard web 30 in the case of two cutters, in which slits are formed according to the cut portions 21a to 21c, and ruled lines are formed according to the respective scored portions 22a to 22d. Have been. Note that the reference lines L1 and L2 in FIG. 6 correspond to the reference lines L1 and L2 in FIG.
[0006]
Also, as shown in FIG. 3, two corrugating machines are normally arranged in series in one corrugating machine. This is because one corrugating machine is in operation while another is in operation. This is because preparations for the order (order change) can be performed and the order can be kept on standby.
To explain this order change, when the production of the current order is completed, the slitter shaft 23a and the ruled line roll shaft 24a provided on the upper side of the corrugated cardboard web 30 are moved upward like the downstream auto slitter scorer 20B shown in FIG. Move to the standby position. At this time, an electromagnetic clutch of a drive system (not shown) that transmits a driving force to the slitter shafts 23a and 23b and the ruled line roll shafts 24a and 24b is simultaneously disconnected, and the rotation of the slitter shafts 23a and 23b and the ruled line roll shafts 24a and 24b is stopped. . Next, the heads 35a, 35b, 35c, and 35d are temporarily stored and then rearranged.
[0007]
That is, as shown in FIG. 7 (shown with respect to the slitter shaft 23a in FIG. 7), the head 35a is once carried out to the storage position (the position shown by the solid line) by the carrier 41, and then set again to the next order setting position (one point). (Position indicated by a chain line). The same applies to the slitter shaft 23b and the ruled line roll shafts 24a and 24b.
[0008]
Note that the carrier 41 is screwed onto a transport screw rod 44 provided in parallel with the slitter shaft 23a, and is rotated by the attached motor 45 to rotate the transport screw rod 44. It is adapted to move on the transport screw bar 44. The moving amount of the carrier 41 is detected through an encoder 48 attached to the motor 45, and based on this, the position of the carrier 41 in the axial direction can be detected.
[0009]
A pusher 42 is attached to the end of the carrier 41. As shown in FIG. 8B, the pusher 42 opens and closes the tip by the operation of an opening / closing device 49, thereby engaging with the head 35a. It can be canceled. That is, as shown in FIG. 8B, the pushers 42 are provided in pairs so as to be able to grip the head 35a, and have an intermediate portion so as to swing the tip (operating end) that contacts and grips the head 35a. The part is pivotally attached to the carrier 41.
[0010]
Further, an opening / closing device 49 having a hydraulic cylinder is provided on the base end side of each pusher 42, and the operating end of each pusher 42 is opened / closed in accordance with the expansion / contraction of the hydraulic cylinder to hold the head 35a. The head 35a can be opened and moved in the axial direction of the slitter shaft 23a without interfering with the head 35a.
[0011]
Regarding the position setting of the head 35a, first, of the plurality of heads 35a (here, for convenience, heads 50, 51, 52, 53, and 54) waiting at the storage position, the rearmost head 50 used in the next order is set. The pusher 42 is arranged outside, and the front end is closed by the operation of the opening / closing device 49 to grip the head 50. Then, by driving the motor 45 to advance the carrier 41, the head 50 is pushed via the pusher 42, and the heads 50, 51, 52, 53, 54 are transported to their respective predetermined positions.
[0012]
First, when the head 50 reaches a predetermined position, the pusher 42 is opened, the engagement of the head 50 is released, and the head 50 is disposed at the predetermined position. Then, the carrier 41 is slightly advanced while the pusher 42 is opened, and the pusher 42 is closed at the rear end of the second head 51 to grip the head 50. In this state, the carrier 41 is advanced again, and when the head 51 reaches a predetermined position, the pusher 42 is opened and the head 51 is arranged. Thereafter, the heads 52, 53, and 54 are arranged at predetermined positions by sequentially repeating the same operation. Also, the head 35b on the opposed slitter shaft 23b is arranged at a predetermined position by the same method as described above. The same applies to the ruled line roll shafts 24a and 24b.
[0013]
The heads 35a, 35b, 36a, 36b arranged on the slitter shafts 23a, 23b and the ruled line roll shafts 24a, 24b in this manner are fixed at their respective predetermined positions by movable keys (not shown). ing. FIG. 8A is a diagram showing a setting example in the cutting unit 21. The initial setting positions of the heads 35a and 35b on the slitter shafts 23a and 23b are, as shown in FIG. , 25b is ideally 1.0 to 1.5 mm.
[0014]
After lowering the slitter shaft 23a to the cutting position, the head 35a is further moved to the left in FIG. 8A by about 2 mm, and the slitter knives 25a and 25b are pressed against each other with a predetermined pressing force. . The initial contact pressure of the slitter knives 25a and 25b at this time directly affects the sharpness and the life, and therefore, the initial fixed positional accuracy of the heads 35a and 35b is a very important factor. The same applies to the initial fixing positions of the ruled line rolls 36a and 36b. Since the ruled line rolls 36a and 36b function by forming a pair with their respective protrusions and recesses aligned as described above, the ruled line rolls 36a and 36b are accurately formed. It is necessary to correspond.
[0015]
[Problems to be solved by the invention]
However, in the conventional head positioning device described above, the pusher 42 provided on the carrier 41 has only a function of pushing out the engaging head 35a from the rear and transferring the same, and when trying to stop the carrier 41, The head 35a may be separated from the pusher 42 due to inertia and may overrun from the target fixed position. The deviation amount ΔS from the target fixing position at this time greatly varies depending on various conditions such as the weight and the transport speed of the head 35a, the coefficient of friction between the head 35a and the slitter shaft 23a, and the deviation amount ΔS It was not possible to set the target fixed position in anticipation of the situation.
[0016]
For this reason, in the conventional head positioning device, the slitter and the crease position on the corrugated cardboard web are shifted due to overrun from the target fixing position of the slitter knife and the crease roll, and the product dimensions become inaccurate, Due to the excessive contact pressure, the durability of the slitter knife and the ruled line roll is reduced, and there is a problem in that the precision of cutting and crease processing is reduced.
[0017]
In addition, if the transport speed of the carrier is reduced, the overrun of the slitter knife and the ruled line roll from the target fixing position is reduced, but in this case, the time required for order change becomes longer and the productivity is reduced. .
The present invention has been made in view of such a problem, and an object of the present invention is to provide a head positioning device that ensures the positioning accuracy of a head and enables high-speed conveyance.
[0018]
[Means for Solving the Problems]
In order to achieve the above object, a head positioning device of the present invention is provided in a slitter scorer of a corrugating machine, and includes a plurality of heads movable on a first axis and a second head parallel to the first axis. A head positioning device, comprising a carrier movable on an axis, for performing storage and positioning of the plurality of heads by the carrier, wherein the carrier is disposed rearward in a moving direction and protrudes toward the head. A pusher that can be brought into contact with the head in the movement direction, and a plurality of grooves formed at regular intervals with the pitch of the plurality of heads at the time of storage on the front side in the movement direction, and a head at the forefront of the plurality of heads. However, it is characterized in that it has a stopper projecting toward the carrier side and capable of being fitted into the plurality of grooves.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 are views showing a head positioning device according to an embodiment of the present invention. FIG. 1 (a) is a partial front view showing the configuration, and FIG. 1 (b) is an arrow A in (a). FIG. 2 is a side view as viewed, and FIG.
[0020]
First, the configuration of the present head positioning device will be described. As shown in FIGS. 1A and 1B, a slitter shaft 3 is provided in the width direction of a corrugated cardboard web 10 as in the conventional case. A head rail (first axis) 7 is extended outside the shaft 3 (upward in FIG. 1) in parallel with the slitter shaft 3. A plurality of heads 4A to 4E are movably disposed on the head rail 7, and each of the heads 4A to 4E has two arms 12a and 12b, respectively, and the tip of each arm 12a and 12b is a slitter shaft. 3 is supported. Each of the heads 4A to 4E has a movable key (not shown), and can be fixed at an arbitrary position on the head rail by the movable key (not shown). Here, the case where five heads 4A, 4B, 4C, 4D, and 4E are provided is exemplified, but it is of course possible to provide other numbers.
[0021]
The slitter shaft 3 is supported by slitter knives 5A, 5B, 5C, 5D and 5E so as to rotate integrally with the slitter shaft 3, corresponding to the heads 4A to 4E. The movement in the width direction (axial direction of the slitter shaft 3) is restricted between the arms 12a and 12b. Thereby, each of the slitter knives 5A to 5E moves on the slitter shaft 3 together with the movement of the corresponding heads 4A to 4E on the head rail 7.
[0022]
The movement of the heads 4A to 4E is performed via the carrier 1 arranged on the carrier rail 6 parallel to the slitter shaft 3. The carrier 1 is provided with a pusher 2 which can protrude toward the heads 4A to 4E through expansion and contraction of expansion and contraction means 16 such as an air cylinder, and operates the expansion and contraction means 16 to cause the pusher 2 to protrude so that the tip of the pusher 2 is moved to the head 4A. 4E, the heads 4A to 4E can be moved by pushing from behind.
[0023]
The carrier 1 is provided with a traveling motor 9. A gear 9 </ b> A fixed to an output shaft of the motor 9 is meshed with the carrier rail 6 to form a carrier rail (second axis) 6. It is designed to run on top. The moving amount of the carrier 1 can be detected by the encoder 8 attached to the motor 9, and the position of the carrier 1 is controlled based on the detected moving amount. In addition, as a driving means of the carrier 1, for example, the carrier rail 6 is used as a transport screw rod as in the conventional technology (see FIG. 7), and the transport screw rod 6 is rotated by a motor (not shown) so as to be axially driven. It may be configured to move to
[0024]
The head 4A at the tip (right side in FIG. 1) of the heads 4A to 4E is provided with a stopper 14 that can protrude toward the carrier 1 through expansion and contraction of expansion and contraction means 13 such as an air cylinder. On the other hand, the lower member 15 fixed to the carrier 1 is provided with a plurality of grooves 15a to 15e, and these grooves 15a to 15e are provided for the number of heads 4A to 4E on the slitter shaft 3. 5, five grooves 15a, 15b, 15c, 15d, and 15e are provided corresponding to the heads 4A to 4E. Then, when the expanding / contracting means 13 is extended to project the stopper 14 of the head 4A, the tip of the stopper 14 fits into one of these grooves 15a to 15e.
[0025]
The pitch of the grooves 15a to 15e corresponds to the thickness of each of the heads 4A to 4E, that is, the interval P in a state where the heads 4A to 4E are in contact with each other. When the pusher 2 is engaged with the engaging portion 4a of the head 4E while the heads 4A to 4E are in contact with each other, the stopper 14 is extended to fit into the groove 15a.
[0026]
Since the head positioning device as one embodiment of the present invention is configured as described above, upon order change, first, the slitter shaft 3 rises from the cutting position to the standby position together with the head rail 7, and the slitter knives 5A to The rotation of 5E stops. Next, the carrier 1 moves on the carrier rail 6 to the extreme end (in FIG. 1A, the right end, not shown), and the telescopic means 16 is extended to push out the pusher 2. Then, while moving toward the rear end (leftward in FIG. 1A), the pusher 2 is engaged with the engaging portion 4a of the head 4A and pushed rearward, and all the heads 4A to 4E are moved in FIG. Unload to the storage position as shown in a).
[0027]
When the heads 4A to 4E are carried out to the storage position, the carrier 1 retracts the pusher 2 by retracting the expansion / contraction means 16 and moves rearward (leftward in FIG. 1A), and the pusher 2 moves to the next order. And stops at a position corresponding to the engaging portion 4a of the rearmost head (here, the head 4E) used in step (1). Then, the expansion / contraction means 16 is extended again to make the pusher 2 protrude and engage with the engaging portion 4a of the head 4E. Next, the expansion / contraction means 13 provided on the head 4A is extended to push the stopper 14 toward the carrier 1, and the tip of the stopper 14 is fitted into the groove 15 a of the carrier 1.
[0028]
When only the heads 4A to 4C are used in the next order, the pusher 2 is engaged with the engaging portion of the head 4C. In this case, the stopper 14 of the head 4A fits into the groove 15c.
In this manner, as shown in FIG. 2A, when the arbitrary number of heads 4A to 4E according to the next order are connected to the carrier 1 by the pusher 2 of the carrier 1 and the stopper 14 of the head 4A. First, the carrier 1 moves so that the rearmost head 4E is arranged at a predetermined position according to the next order. Then, when it reaches a predetermined position, it stops once, contracts the expansion and contraction means 16 and the expansion and contraction means 13 to retract both the pusher 2 and the stopper 14, and releases the engagement between the carrier 1 and the heads 4A to 4E.
[0029]
After the rearmost head 4E is arranged, the carrier 1 advances slightly, that is, moves by a distance P of one pitch to extend the pusher 2 to engage with the head 4D, and then the expansion and contraction means 13 at the head 4A. Is extended to project the stopper 14, and the tip of the stopper 14 is fitted into the groove 15b. When the carrier 1 is connected to the heads 4A to 4D again in this manner, the head 4D is moved to be arranged at a predetermined position.
[0030]
Then, as shown in FIG. 2B, the above operations are sequentially repeated to arrange the heads 4A to 4E at predetermined positions according to the next order.
As described above, according to this head positioning device, the head 4A at the forefront of the heads 4A to 4E to be used in the next order is engaged with the carrier 1 via the stopper 14, and the head 4E at the rear is pushed by the pusher of the carrier 1. 2, the heads 4 </ b> A to 4 </ b> E and the carrier 1 are integrally connected, and it is possible to prevent the heads 4 </ b> A to 4 </ b> E from overrun due to inertia when the carrier 1 stops.
[0031]
Then, after the rearmost head 4E is arranged at a predetermined position, the remaining heads 4A to 4D are integrally connected to the carrier 1 and moved to the next arrangement position, and all the remaining heads 4A to 4D are moved. Since it is repeated until the heads are arranged, it is possible to prevent the overrun when the carrier 1 is stopped for all the heads 4A to 4E, and to accurately arrange the heads at predetermined positions according to the next order.
[0032]
For this reason, it is possible to speed up the transport of the heads 4A to 4E in order change, shorten the resetting time, and improve the productivity.
In addition, since the heads 4A to 4E can be accurately arranged, a high cutting accuracy of the corrugated cardboard web 10 can be obtained, and the quality of the product sheet can be improved. There is also an advantage that the contact pressure of ~ 5E is properly maintained, and the durability is improved.
[0033]
It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented with various modifications without departing from the spirit of the present invention.
For example, the present invention can be applied not only to the positioning of the slitter knives 5A to 5E described above but also to the positioning of a crease roll for performing a crease processing. In this case, a high crease processing accuracy of the corrugated cardboard web 10 is obtained. Thus, the durability of the ruled line roll can be improved.
[0034]
【The invention's effect】
As described in detail above, according to the head positioning device of the present invention, the stopper provided on the frontmost head is fitted into the groove of the carrier, and the pusher provided on the carrier is the rearmost part of the head used. By holding the head, the plurality of heads and the carrier are integrally connected, so that it is possible to prevent the head from overrunning due to inertia when the carrier is stopped, thereby accurately positioning the head at a predetermined position. In addition to this, the speed of head transfer can be increased, the resetting time can be shortened, and the productivity can be improved.
[Brief description of the drawings]
FIGS. 1A and 1B are diagrams showing a configuration of a head positioning device as one embodiment of the present invention, wherein FIG. 1A is a partial front view thereof, and FIG. 1B is a side view of FIG.
FIGS. 2A and 2B are explanatory diagrams of the operation of the head positioning device as one embodiment of the present invention, and FIGS.
FIG. 3 is a side view showing a configuration of a general auto slitter scorer to which a conventional head positioning device is applied.
FIG. 4 is a schematic partial front view showing a configuration of a cutting unit of an automatic slitter scorer to which a conventional head positioning device is applied.
FIG. 5 is a schematic partial front view showing a configuration of a ruled portion of an automatic slitter scorer to which a conventional head positioning device is applied.
FIG. 6 is a plan view showing a processing state of a corrugated cardboard web by the auto slitter scorer shown in FIG.
FIG. 7 is a schematic front view showing a configuration of a conventional head positioning device and explaining a head positioning procedure accompanying an order change.
8A and 8B are views for explaining a problem in a conventional head positioning device, wherein FIG. 8A is a front view of a main part of a slitter shaft showing the head, and FIG. 8B is a cross-sectional view of a slitter shaft showing the head. .
[Explanation of symbols]
Reference Signs List 1 carrier 2 pusher 3 slitter shaft 4A-4E head 4a engaging portion 5A-5E slitter knife 6 carrier rail (second axis)
7. Head rail (first axis)
Reference Signs List 8 Encoder 9 Motor 9A Gear 10 Corrugated cardboard web 12a, 12b Arm 13 Expansion / contraction means 14 Stopper 15 Lower member 15a to 15e Groove 16 Expansion / contraction means

Claims (1)

A plurality of heads provided on a slitter scorer of a corrugating machine and movable on a first axis, and a carrier movable on a second axis parallel to the first axis; In a head positioning device that performs storage and positioning of a head,
The carrier is
A pusher that is disposed on the rear side in the moving direction and protrudes toward the head and can contact the head in the moving direction;
Along with a pitch at the time of storage of the plurality of heads and a plurality of grooves formed at equal intervals on the front side in the moving direction,
A head positioning device, wherein a head at the forefront of the plurality of heads has a stopper that projects toward the carrier and can fit into the plurality of grooves.

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