JP2007238133A - Pressurizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressurizer which is capable of easily applying a given pressure uniformly to each point within an area of an adhesive portion on a plurality of bottom flaps when used in a box assembling machine. <P>SOLUTION: The pressurizer 30 applies a pressure to each point on the adhesive portion of each of a plurality of bottom flaps 3A to 3D. The pressurizer 30 includes a pressurizing frame 31 having a plurality of pressurizing pins 32 operating independently of each other, and each pressurizing pin 32 is provided with an elastic material 33 that supports the pressurizing pin 32 elastically in a direction of projecting the pressurizing pin 32 from the pressurizing frame 31. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pressurizing tool suitable for use in a box assembly machine such as a detergent paper box. Furthermore, it is related with the box assembly machine incorporating the pressurization tool.

As a box assembly machine for detergent paper boxes and the like, as described in Patent Document 1, a plurality of bottom flap adhesive portions provided at one end of the box cylinder are overlapped under the presence of a glue and pressure bonded with a pressure tool. There is something to do.
JP-A-8-295317

  In the box assembling machine of Patent Document 1, a pressurizing tool that pressurizes and bonds the adhesive portions of a plurality of bottom flaps is configured by an elastic endless belt that abuts against the bottom flaps and elastically deforms. However, in each part constituting the bottom of the box, the number of overlapping bottom flaps is not one, and there is a part where there is only one bottom flap and there is no overlapping, and the surface of each part is not flush and uneven. Yes, the thickness of each part is not uniform. For this reason, even if the elastic endless belt is simply brought into contact with the bottom flap, the elastic endless belt is attached to each part according to the unevenness of the surface of each part within the range of the adhesive part of the bottom flap and the difference in thickness of each part. There is a great difficulty in making contact with a constant pressure throughout.

  In addition, as a pressurizing tool, using two or more pressure plates abutting on each part of the adhesive part of the bottom flap, the thickness of each pressure plate is made uneven in the surface of each part within the range of the adhesive part of the bottom flap, It is also conceivable to adjust the plate thickness according to the difference in thickness of each part. However, when changing the box type, the thickness of each pressure plate is adjusted to a thickness that matches the unevenness of the surface of each part within the bonded area of the bottom flap, and the position of each pressure position is adjusted to the unevenness. Therefore, a complicated operation for accurately aligning the position and the like is required, and the mold change time becomes long.

  SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily apply a constant pressure all over a point in a box assembling machine within a range of an adhesive portion of a plurality of bottom flaps.

  The invention according to claim 1 is a pressurizing tool for pressurizing each point of the bonding portion of the plurality of bottom flaps, and has a plurality of pressurizing pins that operate independently from each other on the pressurizing frame. The pressure pins are elastically supported in the direction protruding from the pressure frame by the elastic bodies provided on the pressure pins.

  As shown in FIG. 7, the box assembling machine 10 produces four bottom flaps 3A to 3D provided at one end of each of the body plates 2A to 2D of the square cylindrical box body 2 in order to produce a paper box 1 for detergent or the like. Is folded, and the bottom flaps 3A to 3D are overlapped with each other in the presence of a paste and pressure-bonded to form the bottom 3.

As shown in FIGS. 1 and 2, the box assembling machine 10 includes a carton magazine 11, a carton preliminary folding machine 12, a carton conveying device 13, a gluing device 14, a pressure device 15, and a heating device 16.
The carton magazine 11 stores a large number of boxes 1 in a folded state so that the boxes 1 can be supplied to the carton preliminary folding machine 12.

  The carton preliminary folding machine 12 folds the folded box 1 supplied from the carton magazine 11 into a square cylinder shape, and enables the box 1 to be supplied to the carton conveying device 13.

  The carton transfer device 13 is wound around a drive wheel 21 and a driven vehicle 22 so as to be movable, and includes carton buckets 24 as box holders at a plurality of positions on the transfer chain 23 with a predetermined interval. The carton bucket 24 expands and contracts its gripping arm so as to correspond to the cross-sectional size of the square cylinder of each type of the box 1, and grips the box body 2 of the box 1. The carton transport device 13 continuously transports the box 1 gripped by the carton bucket 24 along the transport path of the carton transport device 13 by the movement of the transport chain 23 (intermittent stop transport is also possible).

  The gluing device 14 has a gluing roller 14 </ b> A disposed below the box 1 conveyed by the carton conveying device 13. In the conveying path of the carton conveying device 13, an inner flap folding device 14B is provided on the upstream side of the gluing roller 14A, and an outer flap folding device 14C is provided on the downstream side of the gluing roller 14A. The inner flap folding device 14B is formed by punching the bottom flaps 3A and 3B as the inner flaps of the box 1 held by the carton bucket 24 of the carton conveying device 13 on the upstream side of the glue roller 14A. Fold it into position. The glued roller 14A includes an outer surface of the bottom flaps 3A and 3B (downward surface in FIG. 2) folded into the punching position by the inner flap folding device 14B, and an outside of the bottom flaps 3C and 3D that are spread outward. When the side surface (the downward surface in FIG. 2) passes directly above the glue roller 14A, an adhesive is applied to the outer surfaces of the bottom flaps 3A, 3B, 3C, and 3D. The outer flap folding device 14C is formed by punching the bottom flaps 3C and 3D which are the outer flaps of the box 1 held by the carton bucket 24 of the carton conveying device 13 on the downstream side of the pasting roller 14A. As a result, the above-mentioned glued surfaces of the bottom flaps 3C, 3D are overlapped with the above-mentioned glued surfaces of the bottom flaps 3A, 3B.

  The pressurizing device 15 includes pressurizing tools 30 at a plurality of positions on the transport chain 23 of the carton transport device 13 through a predetermined interval. Each pressurizing tool 30 is disposed above each carton bucket 24 so as to make a pair with each carton bucket 24 described above, and moves in synchronization with each carton bucket 24.

  The pressurizing tool 30 is supported by an elevating device (not shown) supported by the transport chain 23 and is inserted into the box body 2 of the box 1 held by the carton bucket 24 when the pressurizing tool 30 is lowered from the raised original position ( 3), the adhesive portions of the four bottom flaps 3A to 3D which are glued as described above of the box 1 and overlapped with the heating plate 41 described later of the heating device 16 are pressed and bonded.

  As shown in FIGS. 3 and 4, the pressurizing tool 30 supports a plurality of pressurizing pins 32 in parallel on a pressurizing frame 31 supported by an elevating device (not shown) and lifted and lowered. The pressure pin 32 is elastically supported in a direction protruding from the pressure frame 31 by a coil spring 33 which is a bullet body provided in each of the above. In the pressure frame 31, an upper base plate 31A and a lower base plate 31B are vertically connected by a connecting bracket 31C, and the upper portions of the pressure pins 32 are inserted into a plurality of upper and lower coaxial holes 34A and 34B provided in the base plates 31A and 31B. The pin 32A and the lower pin 32B are inserted so as to be vertically slidable. The pressure pin 32 includes a flange-like stopper 32C between the upper pin 32A and the lower pin 32B. A coil spring 33 is provided around the upper pin 32A between the lower surface of the upper base plate 31A and the stopper 32C. The pressing pin 32 is elastically supported in the direction of protruding from the lower base plate 31B to the limit of protrusion where the stopper 32C hits the upper surface of the lower base plate 31B by elastic force. The pressure pin 32 has a spherical surface at the tip pressure surface 32D of the lower pin 32B. However, the pressing surface 32D may be a flat surface or the like.

  That is, the pressurizing tool 30 pressurizes each of the points 4 (FIG. 4) of the bonded portions of the bottom flaps 3A to 3D by a plurality of pressurizing pins 32 that operate by moving up and down independently of each other. FIG. 5A shows a free state in which the stopper 32C of the pressure pin 32 is in contact with the upper surface of the lower base plate 31B and does not apply pressure to the bonded portions of the bottom flaps 3A to 3D. In FIG. 5B, the pressure pin 32 placed on the adhesive portion of the bottom flaps 3A to 3D and hitting each point 4 is pushed into the pressure frame 31, and the stopper 32C of the pressure pin 32 is moved. A pressing state is shown in which a pressing force based on the elastic force of the coil spring 33 that is separated from the upper surface of the lower base plate 31B and compressed thereby is applied to each point 4 of the bonded portion of the bottom flaps 3A to 3D.

The heating device 16 is disposed below the box 1 being transported by the carton transport device 13.
As the heating device 16 used in the present invention, an electric heater type indirect heating device or the like as shown in FIG. 6 is used. The heating device 16 is provided with an electric heater 42 inside the lower side of the heating plate 41, and heats and bonds the bonding portions of the bottom flaps 3 </ b> A to 3 </ b> D of the paper box 1 passing over the heating plate 41. At this time, the heating device 16 applies the four bottom flaps 3 </ b> A to 3 </ b> D that are glued as described above of the box 1 held by the carton bucket 24 of the carton conveying device 13 to the heating plate 41. And the adhesive portions of the bottom flaps 3A to 3D are heated and bonded. Each point of these adhesion portions is connected to the heating plate 41 by the pressure pins 32 of the pressure tool 30 inserted into the box body 2 of the box 1 and placed on the adhesion portions of the bottom flaps 3A to 3D. Squeeze. That is, the heating device 16 heats and bonds the bonded portion to the adhesive solidification in the process in which the pressure tool 30 of the pressure device 15 press-bonds the bonded portions of the bottom flaps 3A to 3D.

The manufacturing procedure of the box 1 by the box assembling machine 10 is as follows.
(1) The folded box 1 is supplied from the carton magazine 11 to the carton preliminary folding machine 12, and the carton bucket 24 of any one of the carton transport devices 13 is used to fold the box 1 folded into a square cylinder shape by the carton preliminary folding machine 12. To be gripped.

  (2) The box 1 gripped by the carton bucket 24 of the carton transport device 13 is passed through the inner flap folding device 14B through the gluing roller 14A, and the inner flap of the box 1 folded inward by the inner flap folding device 14B. Gluing is performed on the outer surfaces of the bottom flaps 3A and 3B and the outer surfaces of the bottom flaps 3C and 3D that are spread outward.

  (3) The bottom flaps 3C and 3D, which are the outer flaps of the box 1 held by the carton bucket 24 of the carton conveying device 13, are folded inward by the outer flap folding device 14C, and the glued surfaces of the bottom flaps 3C and 3D are attached. Overlay the glued surfaces of the bottom flaps 3A, 3B.

  (4) The pressurizing tool 30 of the pressurizing device 15 is inserted into the box body 2 of the box 1 held by the carton bucket 24 of the carton conveying device 13, and the bottom flaps 3A to 3D are overlapped by the pressurizing pins 32. Each point 4 of the bonded portion in the aligned state is pressurized.

  (5) Heat the bonded portions of the bottom flaps 3 </ b> A to 3 </ b> D that are transported by the carton transport device 13 and pass over the heating plate 41 of the heating device 16. At this time, each point 4 of the bonded portion of the bottom flaps 3A to 3D is pressed against the heating plate 41 by the pressure pins 32 of the pressure tool 30 described in (4) above, and the bonded portion is pressed and solidified. .

  (6) The box 1 is released from the carton bucket 24 of the carton conveying device 13, and the box 1 is discharged toward the subsequent content filling line or the like.

According to the present embodiment, the following operational effects can be obtained.
(a) In the box assembling machine 10, in the process of pressure bonding the bonding portions of the plurality of bottom flaps 3A to 3D of the box 1, the bonding portions are heated and solidified by using heat, so that the heat bonding time Can improve productivity.

  When the box delivery speed of the box assembly machine 10 is increased so as to match the content filling line speed of the box 1 subsequent to the box assembly machine 10, the installation zone of the heating device 16 in the box assembly machine 10 is elongated. The line length of the box assembly machine 10 can be reduced in size because there is no need to secure the necessary heat bonding time. Since the line length of the box assembling machine 10 can be reduced, the number of equipment such as the carton bucket 24 that holds and transports the box 1 and the pressurizing tool 30 that pressurizes the bottom flaps 3A to 3D of the box 1, in other words, the box The number of replacement parts for changing models is small, and the time required for changing molds is short.

  (b) A plurality of bottom flaps 3A to 3D in a superposed state are placed on the heating plate 41 of the heating device 16, and the bottom flaps 3A to 3D are applied by the pressurizing tool 30 placed on the bottom flaps 3A to 3D. By sandwiching the adhesive portion against the heating plate 41, the adhesive portions of the bottom flaps 3A to 3D can be reliably heated, and the pressure adhesion efficiency can be improved.

Moreover, according to this invention, there exist the following effects.
(a) In the box assembling machine 10, each of the points 4 of the bonded portions of the bottom flaps 3 </ b> A to 3 </ b> D can be pressurized by a plurality of pressurizing pins 32 in which the pressurizing tool 30 operates independently of each other. Therefore, even if there is unevenness on the surface of each point 4 within the range of the adhesive portions of the bottom flaps 3A to 3D and there is a difference in the thickness of each point 4, there are other pressure pins 32 corresponding to each of those points 4. Independently of the pressure pin 32, each point 4 is pressurized with a constant pressure throughout.

  Even when the box type is changed, each of the pressure pins 32 can be pressurized with an integrated pressure all over each point 4 within the bonded area of the bottom flaps 3A to 3D without any adjustment. The mold change time is short.

  (b) The pressurizing tool 30 supports a plurality of pressurizing pins 32 in parallel on the pressurizing frame 31, and the pressurizing pins 32 are pressed by the coil springs 33 provided on the respective pressurizing pins 32. Since it is elastically supported in the direction protruding from 31, each point 4 within the range of the bonded portion of the bottom flaps 3 </ b> A to 3 </ b> D is covered by each pressure pin 32 with a simple configuration. , Each coil spring 33 can be pressurized with a constant applied pressure.

FIG. 1 is a schematic plan view showing an entire line of a box assembly machine. FIG. 2 is a schematic perspective view showing the box assembly machine. FIG. 3 is a perspective view showing a box in which a pressurizing tool is inserted in a broken state. FIG. 4 is a plan view showing the pressing point of the bottom flap by the pressing pin of the pressing tool. FIG. 5 shows a pressurizing tool, (A) is a sectional view in a free state, and (B) is a sectional view in a pressurized state. FIG. 6 is a schematic cross-sectional view showing an example of a heating device. FIG. 7 shows a paper box, (A) is a schematic perspective view showing a state before assembly, and (B) is a schematic perspective view showing a state after assembly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box 2 Box body 3A-3D Bottom flap 4 Point 10 Box assembly machine 30 Pressurizing tool 31 Pressing frame 32 Pressing pin 33 Coil spring (bullet)

Claims (3)

  A pressurizing tool for pressurizing each point of the bonding portion of the plurality of bottom flaps, the pressurizing frame having a plurality of pressurizing pins that operate independently of each other, provided on each pressurizing pin A pressure tool that elastically supports the pressure pin in a direction protruding from the pressure frame by the elastic body.   The pressurizing tool according to claim 1, wherein a plurality of pressurizing pins of the pressurizing tool are supported in parallel.   The pressurizing tool according to claim 1 or 2, wherein the pressurizing tool is a box assembling machine in which adhesive portions of a plurality of bottom flaps provided at one end of the box body are overlapped with each other in the presence of a paste and pressurized and bonded with a pressurizing tool. Box assembly machine.

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