JP3778697B2 - Cardboard bonding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a double-sided cardboard is formed by laminating a liner on a single-sided cardboard glued to the top, or another single-sided cardboard and a liner are laminated on the single-sided cardboard (hereinafter referred to as double-sided cardboard). collectively cardboard and double sided corrugated cardboard, but merely relates to contact GoSo location of cardboard forming the) that cardboard.
[0002]
[Prior art]
Generally, a corrugator that manufactures corrugated cardboard has a double facer as a joining device for joining a single-sided corrugated cardboard and a liner at an intermediate portion. This double facer has a heating part and a cooling part. In the heating part, the single-sided cardboard glued to the top of the step and the liner are joined in a transfer state, heated and dried, and the cardboard is cooled in the cooling part. I am doing so.
[0003]
Double facers usually have a conveyor belt on the downstream side of a plurality of heating plates arranged in the running direction of single-sided cardboard and liner, form a heating part with the heating plate, and cool with the conveyor belt The presser belt forming the part is provided so as to straddle the heating plate and the transport belt, and the carrier side belt below the presser belt is moved in the running direction of the single-sided cardboard and liner.
[0004]
In the double facer as described above, if the single-sided cardboard and liner fed between the hot platen and the presser belt are pressed against the hot platen by the weight of the presser belt, the pressing force is insufficient and the single-sided cardboard and liner are good. Since a presser device is provided on the carrier side belt of the presser belt, the presser device presses the carrier side belt toward the heating plate.
[0005]
As the pressing device, there is known a roller pressing type device in which a plurality of pressing rollers are provided on a carrier side belt and the carrier side belt is pressed by the pressing roller.
[0006]
By the way, in the roller pressure type pressing device, heat loss due to heat radiation from adjacent pressing rollers is large. For this reason, there is a lack of effective use of heat from the hot platen, and the length of the heating part is increased in order to securely bond the cardboard, and when the hot platen warps, the entire width direction of the cardboard is used as the hot platen. There is a problem that the cardboard cannot be brought into contact and poor adhesion is caused on the cardboard.
[0007]
In order to solve such a problem, Japanese Patent Laid-Open No. 6-328596 discloses a plurality of pressure shoes arranged in the width direction of the belt on the carrier side belt of the presser belt in the moving direction of the carrier side belt. There is described a shoe pressurizing type presser device which is provided in a row and presses each pressure shoe against a carrier side belt by the elasticity of a spring.
[0008]
In the above shoe pressurizing type presser device, since a large portion of the upper surface of the carrier side belt is covered with a plate-like pressurizing shoe, heat loss from the belt surface is small, and single-sided cardboard and liner are extremely effective. And the cardboard can be reliably brought into contact with the upper surface of the hot platen even when the hot plate is warped.
[0009]
[Problems to be solved by the invention]
By the way, in the double facer adopting the shoe pressurizing type presser device, the cardboard composed of the single-sided cardboard and the liner is uniformly pressed over the entire surface by the elasticity of the spring that presses the pressure shoe. There is.
[0010]
That is, the joined corrugated cardboard discharged from the double facer is cut at the ears on both sides during traveling by the trimming rotary blade provided on the downstream side of the double facer, so that it has a predetermined width dimension. When the traveling cardboard reaches the trimming rotary blade, the bonding between the single-sided cardboard and the liner is not completely completed. The corrugated corrugated corrugated step is compressed by the cutting blade, and the shape is restored by its own elasticity after being cut and passed through the rotating blade. And the stripping tends to occur on both side edges of the cardboard after trimming.
[0011]
In order to prevent this peeling, it is only necessary to increase the pressing force of the pressure shoe corresponding to both side edges so that the bonding of the single-sided cardboard and the liner is fast and firm before reaching the trimming rotary blade. However, the conventional shoe pressurizing type presser structure cannot easily adjust the pressing force of the pressurizing shoe corresponding to the position of the both side edges that vary depending on the width of the cardboard to be manufactured. All the pressing shoes have almost the same pressing force at both side edges. If a pressing force as high as necessary is applied to all the pressure shoes at both side edges, the movement resistance of the presser belt increases due to contact with the pressure shoe, and as a motor that moves the presser belt, A large motor with a large capacity is required, and the presser belt is easily worn.
[0012]
Furthermore, the width of the single-sided cardboard is frequently changed. Accordingly, the pressing force of the pressure shoe outside the pressure shoe facing the both side edges of the cardboard is to avoid the problem of movement resistance and wear of the presser belt. However, in the conventional shoe pressurizing type presser device, such adjustment is difficult.
[0013]
An object of the present invention is to provide a corrugated cardboard which can prevent peeling of both sides of the corrugated cardboard without increasing the capacity of the motor for moving the presser belt and preventing wear of the presser belt. to provide a tangent GoSo location.
[0014]
[Means for Solving the Problems]
In order to solve the above problems, in the first joining device according to the present invention, the presser belt configured to move the carrier side belt facing the upper surface of the heating plate in the running direction of the single-sided cardboard and the liner, It consists of a plurality of pressure shoes arranged in the width direction and movement direction of the upper surface of the carrier side belt, and pressure means for pressing each of the pressure shoes toward the carrier side belt, and glues it to the top of the step In the corrugated cardboard joining apparatus in which the single-sided corrugated cardboard and the liner are pressed against the heating plate by the pressing force of the carrier side belt pressed by the pressure shoe, Among them, each of the pressure shoes located on the outside including the pressure shoes at positions facing both side edges of the minimum width single-sided cardboard sent on the heating plate is pressed. The pressurizing means is a pressure-adjustable pressurizing means capable of adjusting the pressure, and the pressing force of the pressurizing shoe at the position facing both side edges of the single-sided cardboard and the liner is increased to join the single-sided cardboard and the liner. The configuration is used.
[0017]
In the first joining apparatus, the pressing force of the pressure shoe at the position facing the both side edges of the single-sided cardboard and the liner sent onto the heating plate is strengthened to increase the joining force of the both side edges of the cardboard. To do.
[0018]
In this case, the movement resistance of the presser belt is reduced by reducing or eliminating the pressing force of the pressure shoe located outside the pressure shoe at the position facing the both side edges of the single-sided cardboard and liner. be able to.
[0019]
In the second joining device according to the present invention, the carrier belt facing the upper surface of the heating plate is moved in the running direction of the single-sided cardboard and liner, and the width of the upper surface of the carrier-side belt. Comprising a plurality of pressure shoes arranged in a direction and a moving direction, and pressure means for pressing each of the pressure shoes individually toward the carrier side belt, and a single-sided cardboard and a liner glued to the top of the step In the corrugated cardboard joining apparatus in which the carrier side belt is pressed against the hot platen by the pressing force of the carrier side belt pressed by the pressure shoe, and a plurality of processing elements arranged in the moving direction of the carrier side belt are provided. Among the pressure shoe rows composed of pressure shoes, at least one pressure shoe row is the minimum width single-sided step in which the pressure shoes on both sides are fed onto the heating platen. Is provided at a position opposite to both side edges of the rail, and a moving device is provided for adjusting the position of the pressure shoes on both sides in the width direction of the carrier side belt, and pressurizing each of the position adjustable pressure shoes. The pressure adjusting type pressurizing means capable of adjusting the pressure is used, and the pressing force of the pressure shoe at the position facing both side edges of the single-sided cardboard and the liner is increased to join the single-sided cardboard and the liner . The configuration is adopted.
[0020]
In the second joining apparatus, the position-adjustable pressure shoe is adjusted to be positioned at a position opposite to both side edges of the single-sided cardboard and the liner that are fed onto the heating platen, and the pressure-adjusted pressure is adjusted. The pressing force of the shoe is increased so as to increase the bonding force at both side edges of the cardboard.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the single-sided cardboard a and the liner b glued to the top of the step travel at the same speed in the direction indicated by the arrow, and a plurality of hot plates 1 receiving the liner b below the travel path are the liner b. Are arranged in the running direction.
[0022]
A conveyor belt 2 is provided on the downstream side of the hot platen 1. The transport belt 2 travels so that the upper carrier side belt 2a moves at the same speed in the same direction as the travel direction of the liner b.
[0023]
The presser belt 3 is disposed so as to straddle the hot platen 1 and the conveyor belt 2. The presser belt 3 travels so that the lower carrier side belt 3a moves at the same speed in the same direction as the travel direction of the single-sided cardboard a.
[0024]
The presser belt 3 forms a heating part HP with the heating platen 1 and also forms a cooling part CP with the transport belt 2, and presses and bonds the single-faced cardboard a and the liner b in the heating part HP. At the same time, the cardboard A is formed by heating and drying. Further, the cardboard A is cooled in the cooling part CP.
[0025]
The carrier side belt 3 a in the presser belt 3 is pressed toward the hot platen 1 by the first presser device 10 and the second presser device 20. The carrier side belt 3 a is pressed against the transport belt 2 by the third pressing device 60.
[0026]
The first presser device 10 and the third presser device 60 are provided with a plurality of press rollers 11 and 61 extending in the width direction of the carrier side belt 3a at predetermined intervals in the moving direction of the carrier side belt 3a. 61, the carrier side belt 3a is pressed downward.
[0027]
2 to 7 show the second presser device 20. The second presser device 20 is provided with a plurality of plate-like pressure shoes 21 arranged in the width direction of the carrier side belt 3a in a plurality of rows in the moving direction of the carrier side belt 3a, and the pressure shoes 21 of each row are adjacent to each other. The half pitch position is shifted in the width direction of the carrier side belt 3 a with respect to the pressure shoe 21.
[0028]
As shown in FIGS. 4 to 7, a pair of left and right parallel links 22 are provided at the front and rear of the pressure shoes 21 in each row, and the upper side of each parallel link 22 is attached to the lower surface of the beam 23. 24, a pin 25 inserted through a long hole 26 formed in the lower part of the parallel link 22 and a pin 27 attached to the upper surface of the pressure shoe 21. I support it.
[0029]
Further, the upper part of the rear parallel link 22 is extended upward, the adjustment bolt 30 is screwed into the beam 23 so as to face the stopper 29 provided between the extended ends, the contact of the stopper 29 with the adjustment bolt 30, and the length The lowering amount of the pressure shoe 21 is limited by the contact of the pin 27 with the lower end of the hole 26.
[0030]
In addition, among the pressure shoes 21 in each row, including the pressure shoes 21 facing both side edges of the single-sided cardboard a having the smallest width sent onto the heating platen, each of the pressure shoes 21 on the outer side thereof is subjected to pressure. The pressure adjusting type pressure device 31 that can be adjusted is pressed downward, and the remaining pressure shoes 21 are pressed downward by the constant pressure type pressure device 32.
[0031]
As shown in FIGS. 6 and 7, the pressure adjusting type pressurizing device 31 includes a cylinder 33, a piston rod 33 a of the cylinder 33 is connected to the pressurizing shoe 21, and the cylinder 33 is a bracket 34 attached to the beam 23. The pin 35 is supported so as to be swingable.
[0032]
On the other hand, the constant pressure type pressurizing device 32 includes a spring 36 as shown in FIG. 5, and this spring 36 is compressed between a spring receiver 37 attached to the beam 23 and a spring receiver 38 attached to the upper surface of the pressurizing shoe 21. It is incorporated.
[0033]
The cardboard joining apparatus shown in the embodiment has the above-described structure. When joining the single-sided cardboard a and the liner b, the single-sided cardboard a and the liner b glued to the top of the stepboard 1 The sheet is fed between the carrier side belts 3a, and the single-sided cardboard a and the liner b are pressed almost entirely by the pressing force of the pressing shoe 21 pressed by the spring 36 and the pressing shoe 21 pressed by the cylinder 33.
[0034]
In this case, among the plurality of pressure shoes 21 pressurized by the cylinder 33, the pressure shoes 21 including the pressure shoes 21 facing both side edges of the single-sided cardboard a are included in the cylinder 33. The compressed air is supplied to the carrier side belt 3a so that the carrier side belt 3a is held in a pressed state. At the same time, the pressing force of the pressing shoe 21 that presses at least both side edges of the single-sided cardboard a is higher than the pressing force of the spring 36, The pressing force of the pressure shoe 21 located at the position may be the same as or smaller than the pressing force.
[0035]
The pressure shoe 21 positioned outside the pressure shoe 21 facing both side edges of the single-sided cardboard a may be pushed down by the cylinder 33. In this case, the pressure shoe 21 is attached to the carrier side belt 3a. Since unnecessary portions are pressed, the movement resistance of the carrier side belt 3a is large, and the belt 3 is easily worn. For this reason, as shown in FIGS. 4 and 7, the outer pressure shoe 21 is preferably pulled up by the cylinder 33 and held in a non-contact state with the carrier side belt 3a.
[0036]
As described above, when the carrier side belt 3a of the presser belt 3 is pushed down by the pressure shoe 21 pushed down by the elasticity of the spring 36 and the pressure shoe 21 pushed down by the cylinder 33, the single-faced cardboard a and the liner b are entirely covered. Since the pressing force of each pressure shoe 21 that is pressure-bonded and pushed down by the cylinder 33 can be independently adjusted to be stronger than the pressure force of the pressure shoe 21 pushed down by the elasticity of the spring 36, single-sided cardboard Both side portions of a and liner b can be bonded more firmly than the central portion.
[0037]
Therefore, after the cardboard A formed by joining the single-sided cardboard a and the liner b is cooled in the cooling part CP, both sides are trimmed by a trimming rotary blade (not shown) provided on the downstream side of the joining device. Even if the shape is compressed and restored by its own elasticity, the cardboard A hardly peels off at both side edges, and a good cardboard can be obtained.
[0038]
In the embodiment, the pressure shoe 21 positioned on the inner side of the pressure shoe 21 facing both side edges of the single-sided corrugated cardboard is pressed against the carrier side belt 3a by the spring 36 as in the conventional case. The inner pressure shoe 21 may be pressed by a cylinder. In this case, the pressing force with which the cylinder presses the pressure shoe 21 is always constant, and the pressing force may be set to be approximately equal to the pressing force of the spring 36.
[0039]
Note that the cylinder 33 facing both side edges may be automatically controlled by a signal based on the width dimension of the single-sided cardboard a. Furthermore, the pressing force of the cylinder 33 may be automatically adjusted by data and signals based on the type of corrugated cardboard A to be produced, that is, the type of the corrugated board and the type of paper used.
[0040]
Further, the first presser device 10 and the third presser device 60 may have the same configuration as the second presser device 20.
[0041]
8 to 10 show another example of the second presser device 20 of the joining device according to the present invention. In the width direction of the carrier side belt 3a of the presser belt 3, a plurality of plate-like pressure shoes 21 are provided.
[0042]
Of the plurality of pressure shoes 21, the remaining pressure shoes 21 except for the pressure shoes 21 on both sides are supported by the same configuration as the pressure shoes 21 shown in FIG. Since the pressurizing device that presses the pressurizing shoe 21 is also the same constant pressure pressurizing device as in FIG. 5, the same components are denoted by the same reference numerals and description thereof is omitted.
[0043]
Among the plurality of pressure shoes 21, the pressure shoes 21 on both sides are supported so as to be movable in the width direction of the carrier side belt 3a along the beam 23 laid on the carrier side belt 3a. Is adjusted.
[0044]
That is, the pressure shoe 21 is attached via a parallel link 43 to a moving table 42 supported movably along the rail 41 attached to the lower surface of the beam 23, and the moving table 42 is moved by the moving device 40. ing.
[0045]
Here, the moving device 40 rotatably supports both end portions of the respective screw shafts 44 of the two ball screws provided in the length direction of the beam 23 by bearings 45 attached to the beam 23. A screw-engaged nut 46 is attached to the moving base 42, two motors 47 are attached to the beam 23, and the rotation shafts of the motors 47 are rotated on the rotation shaft and the screw shaft 44. The transmission is transmitted to the screw shaft 44 through the chain 51 spanned between the sprockets 50, and the position of each of the pressure shoes 21 is adjusted independently by the movement of the nut 46 in the axial direction by the rotation of the screw shaft 44. ing.
[0046]
Each of the two pressure shoes 21 whose position is adjusted by the moving device 40 is pressed downward by the pressure adjusting type pressure device 31. The pressure adjusting type pressurizing device 31 is composed of a cylinder 33 as in the case shown in FIG. 6, and the cylinder 33 is attached to a bracket 48 attached to a moving base 42 with a pin 49, and the tip of the piston rod 33a is attached to a pressure shoe. 21 is connected.
[0047]
Here, at the stop position where the pressure shoes 21 on both sides whose positions can be adjusted are moved inwardly, the length between the outer edges of the pressure shoes 21 is the minimum width single-sided cardboard a fed into the heating platen 1. The length is approximately equal to the width dimension.
[0048]
In the second presser device 20 configured as described above, the position of the pressure shoes 21 on both sides that can be adjusted is adjusted to a position facing both side edges of the single-sided cardboard a fed into the heating platen, and then the cylinder 33 Is pressed downward, and both side edges of the single-sided cardboard a and liner b are pressed with a force stronger than the pressing force of the pressure shoe 21 pressed down by the elasticity of the spring 36.
[0049]
As described above, by strongly pressing the side edges of the single-sided cardboard a and the liner b with the pressure shoes 21 whose positions can be adjusted, the cardboard A having a strong bonding force on both sides can be formed. For this reason, even if both side portions are trimmed with the trimming rotary blade, peeling is hardly caused on both side edges of the cardboard A as described above, and a good cardboard can be obtained.
[0050]
When adjusting the positions of the pressure shoes 21 on both sides where the position can be adjusted, the positions of both side edges of the single-sided cardboard a are detected by a position detector, and the drive of the motor 47 is controlled based on the detection signal, so You may make it move the pressure shoe 21 to the position which opposes the both-sides edge of the single-sided cardboard a.
[0051]
The second pressing device 20 shown in FIGS. 8 to 10 is used for pressurization of at least one pressure shoe row of the pressure shoe rows arranged in double rows in the moving direction of the carrier side belt 3a of the presser belt 3. In this case, the remaining pressure shoe rows may be the second presser device 20 similar to the case shown in FIG. 4, that is, a pressurizing device that combines pressurization by the cylinder 33 and pressurization by the spring 36. Alternatively, it may be a pressure device in which the plurality of pressure shoes 21 in each row are all pressed by the spring 36.
[0052]
In the second presser device 20 shown in FIG. 8, the pressure of the remaining pressure shoes 21 excluding the pressure shoes 21 on both sides may be pressed by a cylinder instead of the spring 36. At this time, the pressing force of the cylinder may be constant, and the pressing force may be set to the same level as the pressing force of the spring 36.
[0053]
In addition, although the pressure shoes 21 on both sides are individually adjusted by the two screw shafts 44, the pressure shoes 21 on both sides are moved symmetrically by one screw shaft on which a reverse screw is formed. You may make it make it.
[0054]
【The invention's effect】
As described above, in the present invention, by increasing the pressing force of the pressure shoe at the position facing both side edges of the single-sided cardboard sent onto the hot platen, it is possible to obtain a cardboard having strong bonding force at both side edges. It is possible to form a good corrugated cardboard with little peeling at both side edges.
[0055]
In addition, the pressure can be adjusted by pressing means for pressing each of the pressure shoes located on the outside including the pressure shoes at positions facing both side edges of the single-sided cardboard having the smallest width fed onto the heating platen. When the pressure means is used, the pressure shoe positioned outside the pressure shoe at the position facing both side edges of the single-sided cardboard can be held in a non-contact state with respect to the carrier side belt. The resistance can be reduced, and further, wear of the belt can be suppressed.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a corrugated board joining device according to the present invention. FIG. 2 is a plan view showing a portion of a second presser device according to the invention. FIG. 3 is taken along line III-III in FIG. 4 is a cross-sectional view taken along the line VV in FIG. 4. FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 4. FIG. 8 is a cross-sectional view showing another example of the second presser device shown in FIG. 9. FIG. 9 is a cross-sectional view showing a part of FIG. 10 is a sectional view taken along line XX in FIG.
1 Heating plate 3 Presser belt 3a Carrier side belt 21 Pressure shoe 31 Pressure adjustment type pressure device 32 Constant pressure type pressure device 40 Moving device

Claims (2)

A presser belt configured to move the carrier side belt facing the upper surface of the heating plate in the running direction of the single-sided cardboard and the liner, and a plurality of pressure shoes arranged in the width direction and the moving direction of the upper surface of the carrier side belt; And a pressing means that presses each of the pressure shoes independently toward the carrier side belt, and the pressing force of the carrier side belt pressed against the single-sided cardboard and the liner glued to the top of the step by the pressure shoe. In the corrugated cardboard joining apparatus that is pressed against the hot plate and press-fitted, the position of the plurality of pressure shoes facing the opposite side edges of the single-sided cardboard having the smallest width sent on the hot platen is added. pressurizing means for pressing the respective pressing shoe located on the outer side comprise pressure shoe, and a pressure-adjusting pressure unit with adjustable pressure, single-faced corrugated board Bonding apparatus of cardboard, characterized in that so as to bond the single-faced corrugated board and liner by strong pressing force of the pressing shoe in a position to both side edges opposed liner and. A presser belt configured to move the carrier side belt facing the upper surface of the heating plate in the running direction of the single-sided cardboard and the liner, and a plurality of pressure shoes arranged in the width direction and the moving direction of the upper surface of the carrier side belt; And a pressing means that presses each of the pressure shoes independently toward the carrier side belt, and the pressing force of the carrier side belt pressed against the single-sided cardboard and the liner glued to the top of the step by the pressure shoe. In the corrugated cardboard joining apparatus that is pressed against the heating plate and joined by pressure, at least one of the pressure shoe rows comprising a plurality of pressure shoes arranged in the moving direction of the carrier side belt. The pressure shoe row is arranged at a position facing both side edges of the minimum width single-sided cardboard where the pressure shoes on both sides are fed onto the heating plate. A pressure adjusting type pressurizing unit capable of adjusting the pressure as a pressurizing unit that presses each of the positionable pressurizing shoes is provided. A corrugated board bonding apparatus characterized in that the single face corrugated board and the liner are joined by increasing the pressing force of the pressure shoe at positions opposite to both side edges of the single-faced cardboard and liner .

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