JPH09226023A - Tray molding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make constant the time from applying a bonding agent to fixing the same by pressure by setting the carrying start timing based on the timing of starting in the foregoing cycle as a reference and setting the timing equal to the molding time for the completion of works in respective processes for a material feed section, a bonding agent applying section, a preliminary molding section and a main molding section or setting the timing after the given time longer than the above-referred molding time. SOLUTION: A controller 131 is provided with a timer 138 for setting the carrying start timing of a carrying mechanism equal to the molding time, in which the works for respective processes for a material feed section, a bonding agent applying section, a preliminary molding section and a main molding section are finished, or setting the timing after the given time longer than the above-referred molding time. The carrying mechanism is driven by the controller 131 based on the time set by the timer 138. The carrying mechanism is driven by the controller 131 based on the setting timer 138 when the material is finished by anyone of a material release sensor 132, an after jet sensor 135 and a sensor 136 used just before the molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding machine for a tray for packaging articles, and more particularly to a tray molding machine for folding a peripheral portion of a paper material and adhering it to form an upwardly open shape.

[0002]

2. Description of the Related Art Food such as meat, fish, vegetables, etc. shipped to supermarkets, for example, is usually arranged on a tray made of Styrofoam, etc., and then each tray is packaged in a transparent film. A large number of trays will be prepared at the packaging site. In this case, since the tray is formed in a predetermined shape in advance, the tray becomes extremely bulky even in a stacked state, which requires a large storage space and requires a large amount of transportation.

In response to this, in recent years, it has been considered to form a tray from a paper material at the packaging site and supply it to the packaging device, and according to this, storage and transportation of a flat material can be performed. It can be carried out in a state where the storage space is small, or the transportation is facilitated.

As a device for forming a tray from a paper material of this type, a flat paper material is applied with an adhesive from a material supply unit as disclosed in, for example, Japanese Patent Application Laid-Open No. 6-134897. To the molding section, and after applying the adhesive to the material at the coating section, the material is conveyed to the molding section, the peripheral portion of the material is erected at the molding section, and the adhesive is adhered with the above-mentioned adhesive to open the material upward. There is known a tray forming machine which is adapted to form a tray for packaging articles.

Further, in such a tray forming machine,
In order to convey the tray continuously and efficiently mold it, a material take-out sensor that detects whether the material is taken out at the material supply section and a material is detected at the adhesive application section A coating position sensor, a pre-molding sensor that detects whether the material is conveyed to the position immediately before the molding unit, and a molding position sensor that detects whether the material is conveyed to the molding unit are provided. Based on the detection result of each sensor, the driving means of the feeding mechanism for feeding the material, the driving means of the adhesive applying device for applying the adhesive, the driving means of the molding section, etc. are asynchronously supplied, that is, the material is next supplied. If the raw material is not present in the previous process to be attempted, the individual driving means are immediately driven to efficiently perform the processing.

[0006]

However, according to such a control means, at the start of operation, each sensor positioned in the preceding process does not detect the material, so that the material removal sensor for the first material is used. The conveyance mechanism is driven based on the detection signal indicating that the material is present and is conveyed to the adhesive application position, and then the adhesive is applied by the adhesive application device based on the detection signal of the material from the application position sensor. Further, as a result, the material is conveyed to the forming position of the forming unit in a short time and is formed in the forming unit. However, for the second and subsequent materials, the forming operation of the preceding material ends. Until then, the next material cannot be sent to the molding unit, and therefore, the material is conveyed to the molding position after the time required for the molding operation is added.

Therefore, the material at the start of the operation in which the material does not exist in the previous step is short in the time from the application of the adhesive to the pressure bonding in the molding section, and the operation including the molding operation time when the material exists in the previous step. In the case of the material inside, there was a problem that the time from application of the adhesive to pressure bonding at the molding part was long, resulting in variations in the adhesive performance between the two. In other words, if the time from the application of the adhesive to the pressure bonding is too short, the adhesive will not dry enough to obtain sufficient adhesive strength, and if it is longer than necessary, the adhesive will harden and bond. Since the force will be reduced, a predetermined opening time is desired.

Further, the above-mentioned problem is not limited to the start of operation, but also when the material fails to be taken out of the material supply unit during operation or when the material is interrupted, the material does not exist in the previous process. Therefore, the material to be sent next will be sent to the molding section in a short time, which shortens the time from the application of the adhesive to the pressure bonding in the molding section, resulting in the problem of forming a tray with poor adhesion. It was In this case, in particular, it is difficult to find out a tray having a defective adhesion during operation from a large number of trays after molding, so that there is a problem that the tray cannot be excluded.

Therefore, according to the present invention, as described above, in a tray forming machine in which a peripheral portion of a flat paper material is bent and adhered to form a tray, the time from application of adhesive to pressure bonding is always constant. An object is to be able to obtain stable adhesion.

[0010]

In order to solve the above problems, the tray forming machine according to the present invention is characterized in that it is configured as follows.

First, the invention according to claim 1 of the present application (hereinafter,
The first invention) is a material supply part for supplying a planar paper material, an adhesive application part for applying an adhesive to the material supplied from the supply part, and a material supplied from the adhesive application part. Tray forming with a preforming part that processes both sides of the product and a main forming part that forms a tray for upward-opening article packaging by standing up and adhering the peripheral part of the intermediate product processed by the preforming part A machine having a material feeding section, an adhesive coating section, a pre-molding section, and a transport mechanism for sequentially feeding the material to the main molding section, based on the time point when the transport start timing of the transport mechanism started last time. Timer means for setting the time to be equal to or longer than the molding time until the respective process operations in the material supply section, the adhesive application section, the pre-molding section, and the main molding section are completed. And the Based on the timer means, characterized in that is provided with a controller for driving the transport mechanism.

The invention according to claim 2 (hereinafter referred to as the second invention) is, in the above-mentioned first invention, a material take-out detecting means for detecting whether or not a material is taken out in the material supplying section, and an adhesive applying section. It has coating position detecting means for detecting whether or not the material is supplied, and immediately before forming detecting means for detecting whether or not the material is conveyed to a position immediately before the main forming mechanism, and the conveying mechanism includes When any one of the detecting means detects the material, the material supply section, the adhesive coating section, the pre-molding section, and the main molding section are used until the end of the respective process operations with reference to the time when the material has started moving last time. There is provided a timer means for setting the time after a certain time equal to or longer than the molding time, and a controller for driving the transport mechanism based on the timer means. It is characterized in.

According to each invention of the present application, the following effects can be obtained by such a configuration.

First, according to the first and second aspects of the invention, the planar paper material taken out from the material supplying section is sequentially fed into the adhesive applying section, the preforming section and the main forming section by the conveying mechanism. As the transportation start timing of the transportation mechanism increases,
With the timer means, based on the time when it started to move last time, it is equal to or longer than the molding time until the respective process operations in the material supply section, adhesive application section, pre-molding section, and main molding section are completed. It is set to be after a long fixed time, and the transport mechanism is driven by the controller based on the time set by the timer means, so that the adhesive is applied after the material is applied to the material by the adhesive applying section. The time until pressure-bonding molding is always constant at the section, and this makes it possible to obtain stable bonding without variation not only for trays that are in operation but also for trays that have started operation.

According to the second aspect of the invention, the material take-out detecting means for detecting the presence / absence of the material taken out in the material / material supplying section, and the coating position detection for detecting whether or not the material is supplied to the adhesive coating section. A means and an immediately-before-molding detection means for detecting whether or not the material is conveyed to a position immediately before the main molding mechanism are provided, and when any one of these detection means detects the material, the conveyance mechanism is controlled by the controller. Since it is driven after a fixed time that is equal to or longer than the molding time until the end of each process work in each of the above parts, based on the time when it started moving last time, during operation, from the material supply part Even if the tray is molded under the condition that the material fails to be taken out or the material is cut off and the material does not exist in some processes, the material is applied at the adhesive application section. Time to adhesive is crimped molding in part from being applied is always constant, without variations stable adhesive force is to be applied at all.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

As shown in FIGS. 1 and 2, a tray molding machine 1 according to this embodiment has a material supply section 3 on one end side of an upper surface of a pedestal 2 and an adhesive coating section 4 and a pre-molding section at a central portion. Part 5
The main molding section 6 is arranged on the other end side, and the materials stacked and stored in the material supply section 2 are taken out one by one to obtain the adhesive application section 4, the pre-molding section 5 and the main molding section 5. By being sequentially transferred to the forming unit 6, the flat paper material is formed into a tray having a predetermined shape.

Here, the shapes of the raw material A, the preformed intermediate product B, and the tray C as the final product will be described with reference to FIGS.

First, as shown in FIG. 3, the material A is a water-repellent thick paper punched into a predetermined shape, and is provided along the bottom portion A1 which is the bottom of the tray and the front and rear edges thereof. Front and rear sides A2 and A2 that will be the front and rear walls of the tray,
The left and right sides A3 and A3 are provided along the left and right edges of the bottom A1 and serve as the left and right walls of the tray, and the left and right sides A3 and A3 are outside for reinforcement. Of the first side A3 'and the inner second side A3 ". At the front and rear ends of the first side A3', A3 ', the left and right sides of the front and rear sides A2, A2 are formed. Adhesive tongue pieces A4 ... A4 to both ends are provided respectively, and both front and rear end portions of the second side portions A3 ″, A3 ″ and front and rear side portions A2.
Between the left and right ends of A2, connecting portions A5 ... A5 are provided so as to prevent a gap from being formed in a portion where the front and rear walls of the tray are orthogonal to the left and right walls. In addition,
The material A is provided beforehand with polygonal lines for forming the above-mentioned respective parts.

Further, as shown in FIG. 4, the intermediate product B is
The first side A of the left and right sides A3 and A3 of the material A
This is a structure in which 3'and A3 'are folded and adhered to the second side portions A3 "and A3", and this folding and adhering work are performed by the preforming section 5 of the tray forming machine 1. In that case, the first side portions A3 ′, A3 ′ and the second side portions A3 ″,
In order to bond with A3 ″, the second side portion A before preforming
An adhesive is linearly applied to 3 ″ and A3 ″ (see reference numeral a in FIG. 3).

As shown in FIG. 5, the tray C as the final product has front and rear sides A with respect to the intermediate product B.
2, A2 and the first side portions A3 ', A3' as described above
And the left and right side portions A3, A3 formed by adhering the second side portions A3 "and A3" to each other are erected, and the first side portions A3 ', A3' of the left and right side portions A3, A3 are raised. A4, which is a total of four tongue pieces A4 provided at both front and rear ends, are bent and adhered to the left and right ends of the front and rear sides A2 and A2, respectively, from the outside. And this tongue part A4 ... A
Before and after the pre-molding, the front and rear sides A2, A for adhesion of No. 4
Adhesive is applied in a dotted manner in advance on both left and right ends of 2 (see FIG. 3).
(See symbol b).

On the other hand, as shown in FIGS. 1 and 2, a pair of left and right base members 10, 10 are arranged above the pedestal 2 of the tray molding machine 1 over the entire length of the pedestal 2. Material supply unit 3, adhesive application unit 4, preforming unit 5
The main constituent members of the main molding portion 6 are provided so as to straddle the left and right base members 10, 10.

These base members 10, 10 are installed on the front and rear frame members 12, 12 of the pedestal 2 via rollers 11, ... The engaging member 13 provided on the lower surface of the portion ...
13 are engaged with rail members 15 and 15 provided on the frame members 14 and 14 in the middle of the pedestal 2, respectively, so that both base members 10 and 10 can slide left and right on the pedestal 2. Has been done.

Then, as shown in FIG. 6, screw holes 1 are formed on the lower surfaces of the central portions of the left and right base members 10, 10, respectively.
The block members 16 and 16 provided with 6a and 16a are fixed, and one screw shaft 17 extending in the left-right direction is freely rotatable on the side frames 73 and 73 of the transfer mechanism 70 in the preforming unit 5 described later. The male screw portions 17a, 17a of the screw shaft 17 are screwed into the screw holes 16a, 16a of the block members 16, 16 respectively. In addition, a belt 21 is provided between the pulley 18 attached to the central portion of the screw shaft 17 and the pulley 20 attached to the rotating shaft of the motor 19 installed on the frame 2.
Is wound around the belt 21 by the rotation of the motor 19.
The screw shaft 17 is rotationally driven via the.

In this case, the male screw portion 17 of the screw shaft 17
a, 17a and screw holes 16 of the block members 16, 16
The directions of the screws at the respective screwing portions with a and 16a are opposite to each other, and therefore, the screw shaft 17 by the motor 19 is
With the rotation of, the base members 10 on both the left and right sides slide so as to approach or separate from each other.

Next, the material supply unit 3 which is the subject of the present invention
Will be described in detail.

As shown in FIGS. 7 and 8, the material supply section 3 includes a material supply hopper 30 for accommodating planar materials A ... A in a stacked state, and one material A from the hopper 30. It has a material take-out mechanism 40 for taking out and a conveyer 50 for carrying the material A taken out by the mechanism 40 to the front preforming section 5.

The material supply hopper 30 is composed of the bracket 3
It is composed of a pair of left and right side plates 32, 32 attached to the left and right base members 10, 10 via 1 ... 31, respectively. These side plates 32, 32 are the base members 1 described above.
It is attached to 0 and 10 in a rearwardly tilted posture, and locking members 33 and 33 projecting inward are provided at the lower part,
Further, inwardly bent portions 32a, 32a are provided at the rear portion, the left and right side portions of the stacked material A ... A are supported by the locking members 33, 33, and the rearward falling is bent by the bending. The materials A ... A are held between the side plates 32, 32 in a rearward and downward inclined posture by being blocked by the portions 32a, 32a.

Here, as shown in FIG. 7, the locking members 33, 33 have their upper portions joined to the mounting plates 34, 34 fixed to the outer surfaces of the side plates 32, 32, and their lower portions have the lower plates. , 32 are formed so as to project inwardly from the openings 32b, 32b.

At the front of the material supply hopper 30, as shown in FIGS. 7 and 8, a plurality of materials attached to a fixed frame 35 on the pedestal 2 via brackets 36, 36 are prevented. First and second contact members 37, 38 for use
Is provided. The lower end portions 37a, 38a of these contact members 37, 38 are bent rearward so that the first contact member 37
The lower end portion 37a of the lower part of the lowermost material A, whose left and right sides are held by the locking members 33, 33, is located slightly below the second part.
The lower end portions 38a of the abutting members 38 are located further below, respectively, and these lower end portions 37a, 38a are located at the front edge portion of the material A taken out downward from the state held by the locking members 33, 33. It is designed to contact one after another.

On the other hand, as shown in FIGS. 7 and 8, the material take-out mechanism 40 has an upper open U-shaped bracket 41 whose rear end is fixed to the frame member 12 at the rear of the gantry 2.
An arm member 42 that is rotatably connected to and swings up and down.
43, a plurality of suction cups 43 ... 43 mounted side by side on the upper surface of the arm member 42, and a motor 45 for vertically swinging the arm member 42 via a crank mechanism 44, and the suction cups 43 ... 43. A vacuum pipe 48 guided from a vacuum pump 46 shown in FIG. 1 through an air filter 47 is connected to the suction pump 43.
The suction force acts on 43. Then, when the arm member 42 is swung upward by the motor 45, the suction cups 43 ... 43 project into the upper material supply hopper 30 from between the left and right base members 10, 10, and the hopper 3
It is adapted to be adsorbed to the lower surface of the material A located in the lowest layer within 0.

The conveyor 50 has a bracket 4 attached to the frame member 12 at the rear of the gantry 2.
A pair of left and right rear rollers 51, 51 supported by 1;
A pair of left and right front rollers 52, 52 (see FIG. 2) supported by the side frames 73, 73 of the transport mechanism 70 of the preforming unit 4 described later, and these rollers 51, 5
A pair of left and right ropes 5 wound between 1,52,52
3, 53, and these ropes 53, 5
43 is located between the top dead center position and the bottom dead center position of the suction cups 43 ... 43 of the material take-out mechanism 40, and the material A sucked by the suction cups 43 ... 43 at the top dead center position When the suction cups 43 ... 43 move downward, these ropes 53, 5
It is supposed to be handed over to 3.

The conveyor 50 is driven by the power supplied from the side of the preforming section 4 so that the rollers 52, 52 on the front side are fed.
Is driven, the ropes 53, 53 travel forward, and the material A received from the take-out mechanism 40 is supplied to the front preforming unit 4.

Here, the left and right side plates 32, 32 of the material supply hopper 30 are provided with a projector 55 and a light receiver 56 so as to face each other with the accommodated materials A ... A therebetween, and the detection from the projector 55 is performed. The amount of the raw materials A ... A stored in the hopper 30 can be detected by the amount of light entering the light receiver 56.

An adhesive application section 4 is provided above the transfer position of the material A from the material supply section 3 to the preforming section 5, as shown by the chain line in FIG. The adhesive applying section 4 has two first and second adhesive nozzles 61 and 62 on the left and right, and these nozzles 6 are provided.
1, 62, the adhesive in the adhesive tank 62 accommodated under the gantry 2 shown in FIG. 1 is supplied by the pump 63 through a pipe (not shown), and the material A is preformed. When it is supplied to the part 5, the reference characters a, a,
An adhesive is applied as indicated by b and b.

Next, the preforming part 5 and the main forming part 6 are formed.
The configuration will be briefly described.

First, as shown in FIGS. 1 and 2, the preforming section 5 is provided with a conveying mechanism 70 installed in the central portion of the gantry 2 and extending in the front-rear direction, and left and right base members 10 on both left and right sides of the front half thereof. , 10 on the left and right sides of the rear half of the transport mechanism 70 and side pressure-bonding mechanisms 100 on the left and right base members 10, 10.

As shown in FIGS. 9 to 11, the transport mechanism 70 faces a plurality of lower rollers 71 ... 71 arranged at regular intervals in the front-rear direction and these lower rollers 71. A plurality of upper rollers 7 arranged in
2 ... 72. Of these, the lower roller 71 ...
71 is a frame member 14, 14 in the left-right direction on the pedestal 2.
A pulley 7 that is rotatably supported between a pair of left and right side frames 73, which is installed between the pulleys, and is attached to a rotation shaft of a motor 74 installed on the mount 2.
5, pulleys 76 ... 76 respectively attached to the shafts of the lower rollers 71 ... 71 except the rearmost lower roller 71 outside one side frame 73, and a plurality of guide pulleys attached to the side frame 73. 77 ... 7
7, a belt 78 is wound around, and a belt 79 is also wound between the lowermost roller 71 at the rearmost portion and the lower roller 71 in front of the lowermost roller 71, whereby the lower rollers 71 are rotated by the rotation of the motor 74. 71 are driven to rotate in a predetermined direction all at once.

Of the upper rollers 72 ... 72,
The plurality of rollers 72, ..., 72 located at the rear are rotatably mounted on the pair of left and right first side frames 81, 81, and the plurality of rollers 72, 72, located at the front are rotatably mounted on the pair of second side frames 82, 82, respectively. While being supported, the first and second support frames 83, 84 are disposed above the side frames 81, 81, 82, 82, respectively, and the first support frame 83 and the first side frame 81, 81, and the second support frame 84 and the second
The side frames 82 and 82 are connected via Roberval mechanisms 85 and 85, respectively.

The Roberval mechanism 85 includes a bracket 86 on the side frames 81, 81, 82, 82 side.
It is composed of a bracket 87 on the side of the support frames 83, 84 and two sets of leaf springs 88, 88 installed vertically in parallel between them, while holding the side frames 81, 81, 82, 82 in a horizontal posture. 71 is elastically supported so as to be vertically displaceable, so that the material A is always sandwiched between the lower rollers 71 ... 71 and the upper rollers 72 ... 72 with a uniform pressure. Roller 71
The material A is conveyed forward as the 71 rotates.

The first and second support frames 83,
When the locking members 89, 89 at one end are loosened, the 84 can be swung upward around the other end, and the side frames 81, 8 supporting the upper rollers 72, 72 at the time of inspection or the like.
1, 82, 82 can be flipped upward via the support frames 83, 84 and the Roberval mechanism 85, 85.

On the other hand, as shown in FIG. 10, the side bending mechanism 90 disposed on both the left and right sides of the front half of the transport mechanism 70 has a pair of left and right receiving members 91, 91 and a first bending member 92. , 92 and the second bending member 93,
93, and these are fixed symmetrically on the left and right base members 10, 10. Here, the second bending members 93, 93 located so as to enter the inside of the first bending members 92, 92 from above are fixed to the base members 10, 10 via brackets 94, 94, respectively. Then, as indicated by the chain line, the transport mechanism 70
71 and the upper rollers 72 ... 72, and the central portions are sandwiched between the lower rollers 71 ... 71 and the upper rollers 72 ... 72, and the left and right side portions A3 and A3 shown in FIG. The first side portions A3 'and A3' are bent so as to overlap with the second side portions A3 "and A3". In this embodiment, the side bending mechanism 90 is arranged so as to overlap with the adhesive applying section 3, so that the material A is bent at the same time when the adhesive is applied.

Further, as shown in FIGS. 2 and 11, the side pressure-bonding mechanisms 100 arranged on the left and right sides of the rear half of the transport mechanism 70 are mounted on the left and right base members 10, 10 via brackets 101, 101, respectively. A plurality of lower rollers 102, 102, 102 arranged at regular intervals in the front-back direction.
102 and these lower rollers 102 ... 102, 10
2 ... 102 and a plurality of upper rollers 103 ... 103, 103 ... 103 arranged so as to face each other. The brackets 104 that support the upper rollers 103 ... 103 and the brackets 105 that are fixed to the base member 10 on each of the left and right sides are a Roberval mechanism 85 that supports the upper rollers 72 ... 72 of the transport mechanism 70. They are connected via Roberval mechanisms 106, 106 using similar leaf springs.

As a result, the lower roller 7 of the transport mechanism 70 is
71, and the upper rollers 72 ... 72, the left and right side portions A of the material A having the central portion nipped and conveyed forward.
The first side portions A3 ′, A3 ′ and the second side portions A3 ″, A3 ″, which are overlapped with each other, are pressure-bonded to each other to form the second side portions A3 ″, A3.
Both sides A through the adhesive pre-applied to 3 "
3 ', A3', A3 "and A3" are bonded together.

Further, the structure of the main molding part 6 will be described.
As shown in FIGS. 12 and 13, the main molding portion 6 includes a pair of male mold members 112, which are supported by the left and right base members 10, 10 via two guide rods 111, 111 so as to be vertically movable. 112, the left and right base members 1
The pair of left and right first female mold members 114 and 1 supported by brackets 113 and 113, respectively.
14 and the second female members 115, 115 and the leaf springs 11 on the front and rear ends of the brackets 113, 113, respectively.
Rollers 117 ... 11 mounted via 6 ... 116
And 7.

Further, the pair of male members 112, 112
A pin 118 that extends in the left-right direction is inserted through the pin 118 and the motor 11 installed on the frame 2 and the pin 118.
9, a crank mechanism 120 is formed between the crank mechanism 120 and the motor 1.
By the rotation of 19, the crank mechanism 120 and the pin 1
A pair of left and right male members 112, 112 are moved up and down via 18.

The male members 112, 112 have a shape corresponding to the internal space of the tray divided into two parts in the front-rear direction. In addition, the left and right first female members 114, 1
Reference numeral 14 denotes a pair of front and rear plate-shaped pressing portions 114a hung from above the front and rear ends of the male member 112.
114a, and the second female member 115,115
Are arranged along the lateral sides of the male member 112 at the intermediate rising position, and the corner forming portions 115a, 11b which are bent like roofs at the front and rear ends thereof.
5a is provided. Further, the roller 1
17 ... 117 are all first large-diameter first portions located inside
It is composed of a roller 117a and a second roller 117b located on the outer side, and these are arranged adjacent to each other on the same axis so as to be in rolling contact with the front and rear end faces at the raised position of the male member 112.

At the bottom dead center position of the male mold members 112, 112, the intermediate product B shown in FIG.
With the upward movement of the male mold members 112, 112 due to the rotation of 19, the front and rear sides A2, A2 of the intermediate product B are first pressed by a total of four pressing parts 1 of the first female mold members 114, 114.
14a ... 114a are bent along the front and rear end faces of the male members 112, 112. Then, the left and right side portions A in which the first and second side portions A3 ', A3 "are folded and overlapped
3, A3 is the male mold member 11 by the corner molding portions 115a ... 115a at the total of four positions of the second female mold members 115, 115.
Bend along the side of 2,112,
A4, a total of four tongue pieces A4 ... A4 at the front and rear ends of the left and right sides A3, A3 (first side 3A ') are bent, and then the tongue pieces A4 are made by the rollers 117 ... 117.
... A4 on the front and back sides by the adhesive applied in advance
2, A2 is adhered to both ends of the outer surface.

It should be noted that plane U-shaped frame members 121 and 121 are provided in series above the first female members 114 and 114, respectively, and the pair of left and right frame members 121 and 121,
The tray formed by the main forming unit 6 is a male mold member 112,
A tray storage portion 122 is formed which is sequentially pushed up from below by 112 and stored.

The tray forming machine 1 described above is equipped with the structure shown in FIG.
A control system 130 as shown in FIG. The control system 130 has a controller 131 for controlling the operation of the entire molding machine, and the input side of the controller 131 detects whether or not the material A is taken out by the material taking-out mechanism 40 arranged as shown in FIG. A front-point injection for detecting whether or not the material take-out sensor (material take-out means) 132 and the front side A2 of the material A arranged as shown in FIG. 9 are supplied to the position below the first adhesive nozzle 61. The sensor 133 and the second side portions A3 ″ of the right and left side portions A3 of the material A,
The continuous injection sensor 134 for detecting whether A3 ″ is supplied to the position below the second adhesive nozzle 62, and whether the rear side portion A2 of the material A is supplied to the position below the first adhesive nozzle 61. 12, a rear-point injection sensor (application position detection means) 135 for detecting whether or not the intermediate product B has been supplied to a position immediately before the molding unit 5 and a pre-molding sensor (immediately before molding) 136 for detecting whether or not the intermediate product B has been supplied. The intermediate product B arranged as shown is connected to a molding position sensor 137 that detects whether or not the intermediate product B is supplied to the molding position of the molding unit 5, and the output side is provided with the motor 45 for taking out the material. The vacuum pump 46 for adsorbing the material, the pump 63 for ejecting the adhesive, the motor 74 for conveyance, and the motor 119 for molding are connected to each other. Overall layout of 5,136,137 is shown in Figure 15.

Further, the controller 131 is used in the material supplying section 3, the adhesive applying section 4, the preforming section 5, and the main forming section 6 based on the time point when the conveyance start timing of the conveyance mechanism 70 has started last time. A timer 138 that is set to be equal to or longer than the molding time until the completion of each process work is provided, and based on the time set by the timer 138. The controller 131 is the transfer mechanism 70.
Is to be driven.

Here, when the controller 131 detects the material A by any one of the material take-out sensor 132, the rear-point injection sensor 135, and the just-before-molding sensor 136, the controller 131 causes the transport mechanism to operate based on the setting timer 138. 7
0 is driven. As a result, even if the material A fails to be taken out of the material supply unit 3 during operation or the material A in the hopper 30 is lost and the material A is interrupted, it is possible that the material A does not exist in some steps. However, the molding operation is performed sequentially.

In this case, the controller 131 has seven types of material existence patterns shown in FIG. 16 based on the material detection signals from the material take-out sensor 132, the rear-point injection sensor 135, and the just-before-molding sensor 136. In addition to confirming which is, the case where at least the material take-out sensor 132 detects the material is the pattern A, the material take-out sensor 132 does not detect the material,
At least the case where the rear-point injection sensor 135 detects the material A is classified as the pattern B, and the case where only the pre-molding sensor 136 detects the material is classified as the pattern C, and each process is performed in the priority order of the pattern A, the pattern B, and the pattern C. The molding operation of the section is controlled.

Next, the operation of the tray molding machine 1 using this control system 130 will be described.

Specifically, the operation of the tray molding machine 1 is performed as follows according to the flow charts shown in FIGS. Further, FIG. 21 is a time chart of the molding operation.

First, when a large number of materials A ... A are stored in the material supply hopper 30 of the material supply unit 3 in a stacked state and the operation of the tray molding machine 1 is started, the controller 131 causes the material extraction. The motor 45 of the mechanism 40 is actuated to move the arm member 42 of the mechanism 40 upward via the crank mechanism 44, and the vacuum pump 46 is also actuated to suck the suction cups 43 ... 43 attached to the arm member 42. 43 is sucked to suck the suction cups 43 ... 43 onto the lower surface of the material A located in the lowermost layer in the hopper 30. Then, the arm member 42
43 moves downward, the material A adsorbed by the suction cups 43 ... 43 is taken out downward from the inside of the hopper 30, and the conveyor 5
It is delivered on the left and right ropes 53, 53 at 0.

Next, the controller 131 proceeds to step S
After the predetermined time t1 set in the starting timer set in 2 and S3 has elapsed, the timer 138 is set in step S4.
Sets the cycle time of the transport mechanism 70, that is, the time from the time of the previous movement to the start of transport after the completion of all molding operations in each process, and in step S5, the material take-out sensor 132, rear Point injection sensor 13
5. The pre-molding sensor 136 determines whether or not the material A exists. Then, these sensors 132, 13
When any one of the rollers 5 and 137 detects the material A, the motor 74 of the transport mechanism 70 is operated in step S6, and the transport mechanism 70 and the conveyor 5 are driven by the motor 74.
Drive 0. As a result, the material A is transported forward and supplied to the latter half of the adhesive application section 4 and the preforming section 5.

Then, in step S7, the controller 131 causes the material take-out sensor 132 and the rear point injection sensor 13 to operate.
5. Based on the detection signal of the material A, the pre-molding sensor 137 determines which material existing pattern shown in FIG. 16 belongs to. When the material take-out sensor 132 detects the material A, the existence patterns 1, 3, 5, and 7 are determined to be the pattern A in step S7, and the operation is performed based on the pattern A. If the presence pattern 2 or 6 in which the rear-point injection sensor 135 detects the material A is detected while the material A is not detected, the step S
In the case of existence pattern 4 in which it is determined that the pattern is B in 8 and operation is performed based on the pattern B, and only the pre-molding sensor 136 detects the material, the pattern C is calculated in step S9.
It is determined that the operation is performed based on the pattern C.

For example, in step S7, the material take-out sensor 1
When it is determined that only 32 is the pattern A in which the material A is detected, as illustrated in FIG. 18, the controller 131 first determines in step S10 whether or not the front point injection sensor 133 has detected the material A. When the point injection sensor 133 detects the material A, the transport mechanism 7 is operated at step 11.
0 and the conveyor 50 are stopped, and in step 12, the adhesive injection pump 63 is operated to operate the first adhesive nozzle 61,
As shown in FIG. 3, the adhesive is applied in a dot shape from 61 to the left and right ends of the front side A2. After the application, in step S13, the transfer mechanism 70 and the conveyor 50 are driven to transfer the material A to the front, and the second adhesive nozzle 62,
The adhesive is sprayed from 62 and applied linearly continuously to the second side portions A3 ″, A3 ″. Then, when the rear-point injection sensor 135 detects the material A in step S16, step S1
At 7, the injection from the second adhesive nozzles 62, 62 is stopped, and at the same time, the transport mechanism 70 and the conveyor 50 are stopped at step S18. At the time of the stop, step S19,
The adhesive is applied from the S20 first adhesive nozzles 61, 61 to the left and right end portions of the rear side portion A2 in a dot shape, and the next material A is taken out by the material take-out mechanism 40.

When the material A is conveyed to the position where the application of the adhesive is finished, the side bending mechanism 90 in the latter half of the preforming portion 5 causes the first side portion A of the left and right side portions A3 and A3.
3'and A3 'will be bent.

When step 20 is completed, the process is returned to step 3, and the controller 131 moves the transport mechanism 70 and the conveyor 50 to the conveyor mechanism 50 after a predetermined time t2 seconds from the time when the transport mechanism 70 is first driven in step 3. For the second material A that has been driven and taken out by the material taking-out mechanism 40, the steps S3 to S20 described above are performed.
The application process of the adhesive is similarly performed. On the other hand, the first material A
Is transported from the position where the application of the adhesive has been completed to the position immediately before the molding, as the transport mechanism 70 is driven in the coating process described above. During the transportation, the bent first side portions A3 ′, A3 ′ are changed to the second side portions A3 ″, A by the side pressure bonding mechanism 100.
The second side portions A3 "and A3" are overlapped on the 3 "side.
Depending on the adhesive applied to the first and second side portions A
3 ', A3', A3 ", and A3" are adhered to form an intermediate product B in which the left and right side portions A3, A3 are stacked as shown in FIG.

When the transporting mechanism 70 and the conveyor 50 are stopped after the above-mentioned coating steps S5 to S18 are finished, the material folding mechanism 40 takes out the material and the rear side of the second material is removed. The adhesive is applied in dots on both left and right ends of the side portion A2.

When step 20 ends, the process returns to step 3 again, and the controller 131 causes the transport mechanism 70 and the transport mechanism 70 after a certain cycle time t2 seconds from the time when the transport mechanism 70 is first driven in step 3. For the second and third materials A taken out by the material take-out mechanism 40 by driving the conveyor 50, the adhesive application step of steps S5 to S20 and the folding step of both side parts are similarly performed. .

On the other hand, the first intermediate product B is transported from the position immediately before the molding to the molding position by the driving of the transport mechanism 70 in the coating process.

Then, when the molding position sensor 137 detects the intermediate product B, the controller 131 finishes the coating process, the folding process on both sides, and the carrying process to the molding position, and the carrying mechanism. 70 and the conveyor 50 are stopped, the motor 119 in the main molding section 6 is operated to operate the male mold member 11 according to the timing.
Move up 2,112. Thereby, the male member 11
2, 112 and the first female members 114, 114 and the second female members 115, 115, the front and rear side portions A2, A2 and the left and right side portions A3, A3 of the intermediate product B are sequentially erected. A4 ... A4 of the left and right side portions A3, A3 are bent by the rollers 117, 117 by the adhesive applied to the left and right end portions of the portion A2, and the front and rear portions thereof are bent. It will adhere to the outer surfaces of the side portions A2 and A2. Then, after the male members 112, 112 are stopped at the elevated position for a certain time t3 to perform the crimping operation,
The carrier mechanism 70 is moved downward within a range equal to or longer than the cycle time t2 to return to the position before molding.

As a result, the tray C as a final product as shown in FIG. 5 is completed, and a series of these operations is repeated, so that the tray C is provided in the tray storage section 122 provided above the main molding section 6. It is pushed up from the bottom and piled up.

In this case, since the cycle time t2 of the transfer mechanism 70 is always constant, the adhesive nozzle 61,
The time from the application of the adhesive material by 62 to the delivery to the molding position becomes constant, and of course the tray C during normal operation,
It is possible to obtain stable adhesion even for the tray C that has been started.

The controller 131 determines in step S5.
In the material take-out sensor 132, the rear point injection sensor 13
5. If none of the pre-molding sensor 136 detects the material A, it is determined that the material is not taken out or there is no material, and the controller 131 stops the operation.

In the control system 130 of the tray molding machine 1, even if the material A from the material supply unit 3 fails to be taken out during operation, or if the material A in the hopper 30 runs out and is interrupted. With respect to the time point when the transport mechanism 70 starts to move last time by the controller 131, the molding time until the end of each process work in each of the parts, that is, the time until the molding operation in the molding part 6 ends in the present embodiment. Is equal to or
Alternatively, by driving after a constant cycle time t2 that is longer than that, the time until the material A is fed from the adhesive application position to the molding position is controlled to be constant.

In this case, first, as shown in the explanatory diagram of the material existence pattern in FIG. 16, the material existence patterns 1 to 7 are shown.
Among them, when the existence patterns 1, 3, 5, and 7 are present, the operation of the pattern A described above, that is, the stop time of the transport mechanism 70 is always controlled by the front point injection sensor 133. The time until the material A is fed from the adhesive application position to the molding position is constant. The controller 131 also executes step S1.
When the front injection sensor 133 does not detect the material A due to a delivery error of the material A or the like at 0, when the intermediate molded product B is positioned at the position immediately before molding in step S21, the immediately before molding sensor 136 causes the intermediate molded product B to move. Is detected, the transport mechanism 70 is stopped (steps S22 and S23). The sensor 13 immediately before molding
When 6 does not detect the intermediate molded product B, the process returns to step 10 and the front point injection sensor 133 detects the material A again.

Further, in the case of the presence patterns 2 and 6, since the stopping operation of the transport mechanism 70 by the front point injection sensor 136 of the pattern A described above cannot be obtained, the controller 131 proceeds to step S8 in FIG. As shown in the figure, the pattern B is selected, and when the intermediate molded product B is located at the position just before molding, the pre-molding sensor 136 detects the intermediate molded product B to stop the transport mechanism 70 (step 24). ~ S26).

In the case of the presence pattern 4, neither the stopping operation of the transport mechanism 70 by the rear-point injection sensor 135 of the pattern A nor the stopping operation of the transport mechanism 70 by the pre-molding sensor 136 of the pattern B can be obtained. Therefore, the controller 131 selects the pattern C shown in FIG. 20 in step S9, detects whether the intermediate molded product B is located at the molding position by the molding position sensor 137, and the molding position sensor 137 detects the intermediate product B. The transport mechanism 70 is stopped when detected (step S27).
To S29).

As described above, even if the material A fails to be taken out of the material supply unit 3 during operation, or if the material A runs out and is interrupted, it is possible to detect whether the material supply unit 3 has taken out the material. An ejection detection sensor 132,
Of the rear-point injection sensor 135 that detects whether or not the material is supplied to the adhesive application section, and the pre-molding sensor 136 that detects whether or not the material A is conveyed to the position immediately before the pre-molding section 5. , Either one is material A or intermediate product B
When the transport controller 70 detects the
31 is driven after a constant cycle time t2, which is longer than the molding time until the end of the respective process work in each of the above parts, based on the time when the motion last started. Even with respect to the tray C molded under the condition that the presence of no is present, a stable adhesive force is given without any variation.

Further, in the above embodiment, the molding time in the main molding section 6 can be appropriately changed within a range not exceeding the cycle time t2 of the transfer mechanism 70, and the cycle time t2 can be changed. Of course, the setting can be changed by the timer 138. Due to this, for example, the curing time of the adhesive is long in the summer due to the influence of the outside temperature, and the curing time of the adhesive is shortened in the winter, but even in such a case, the main molding part can be treated within the above-mentioned time. By changing the pressure bonding time t3 in 6, it is possible to set the bonding ability according to the situation at the moment with one adhesive while performing the bonding without variations.

Furthermore, in the above-described embodiment, the left and right side plates 3 that make up the hopper 30 in the material supply section 3 are described.
2, 32, the left and right receiving members 91, 91 in the side bending mechanism 90 of the preforming unit 5, the first bending member 92,
92, the second bending members 93, 93, and the left and right lower rollers 102 ... 102, 1 in the side pressure bonding mechanism 100.
02 ... 102, upper rollers 103 ... 103, 103 ... 1
03, left and right male mold members 112, 11 in the main molding part 4
2, first female mold member 114, 114 and second female mold member 11
5, 115 and the like are the left and right base members 10, 10
Since they are arranged separately above, if the screw shaft 17 is rotated by the motor 19 and the left and right base members 10 and 10 are slid so as to be in contact with each other or separated from each other, the above-mentioned members are also separated. The left and right things come close to each other or move away from each other, which makes it possible to form trays having different widths.

[0076]

As described above, according to the first and second inventions of the present application, in the tray forming machine for forming an upward-opening tray by standing up the periphery of a flat paper material, The flat paper material taken out is sequentially fed into the adhesive application section, the pre-molding section, and the main molding section by the transport mechanism, and the transport start timing of the transport mechanism is set by the timer means to the previous time. After a certain time, which is equal to or longer than the molding time until the end of each process work in the material supply section, adhesive application section, pre-molding section, main molding section, based on the time when the movement starts Is set so that the transport mechanism is driven by the controller based on the time set by the timer means, the time from when the adhesive is applied to the material to when the material is pressure-molded by the molding unit is It becomes constant, thereby the tray during operation, of course, also the tray of the start of operation, it is possible to obtain a variation not stable adhesion.

In addition to the above operation, according to the second aspect of the invention, even if the material is unsuccessfully taken out of the material supply section or the material is interrupted during operation, the material is taken out of the material supply section. Material removal detection means to detect the presence or absence of the material, application position detection means to detect whether or not the material is supplied to the adhesive application part, and whether or not the material is conveyed to the position immediately before the main molding mechanism. When any one of the just-before-molding detecting means detects a material, it is equal to the molding time until the respective process work in each of the above parts is finished, with the time point when the transport mechanism starts to move last time by the controller as a reference. Or, because it is driven after a certain time longer than that, even for trays molded under the condition that no material is present in some processes,
A stable adhesive force is given without any variation.

[Brief description of drawings]

FIG. 1 is an overall front view of a tray molding machine according to an embodiment of the present invention.

FIG. 2 is a partial transverse plan view of the tray molding machine.

FIG. 3 is a plan view of a material used in the tray molding machine.

FIG. 4 is a plan view of an intermediate product manufactured by the tray molding machine.

FIG. 5 is a perspective view of a tray formed by the tray forming machine.

6 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 7 is an enlarged cross-sectional view of a material supply unit of the tray molding machine.

FIG. 8 is a view on arrow EE of FIG. 7.

FIG. 9 is a front view of a preforming unit of the tray forming machine.

FIG. 10 is an enlarged cross-sectional view taken along line W-W of FIG.

11 is an enlarged cross-sectional view taken along the line A-E of FIG.

FIG. 12 is a front view of a main molding unit of the tray molding machine.

13 is a cross-sectional view taken along the line O-O of FIG.

FIG. 14 is a control system diagram of the tray molding machine.

FIG. 15 is an explanatory diagram of a material existence pattern.

FIG. 16 is a flowchart showing the operation of the tray molding machine.

FIG. 17 is a flowchart showing an operation of the tray molding machine.

FIG. 18 is a flowchart showing the operation of the tray molding machine.

FIG. 19 is a flowchart showing the operation of the tray molding machine.

FIG. 20 is a flowchart showing an operation of the tray molding machine.

FIG. 21 is a time chart showing the operation of the tray molding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tray molding machine 3 Material supply section 4 Adhesive application section 5 Pre-molding section 6 Main molding section 131 Controller 132 Material ejection means (material ejection sensor) 135 Application position detection means (rear point injection sensor) 136 Immediately before molding detection means (molding) Previous sensor) 138 timer A material C tray

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yukio Sasaki 1 959 Shimoda, Ritto-cho, Kurita-gun, Shiga Prefecture Incorporated company Ishida Shiga Works (72) Inventor Yoshio Iwasaki 1 959 Shimohaku, Ritto-cho, Kurita-gun, Shiga Incorporated company Ishida Shiga office

Claims (2)

[Claims] 1. A material supply section for supplying a planar paper material, an adhesive application section for applying an adhesive to the material supplied from the supply section, and both sides of the material supplied from the application section. It is a tray forming machine having a preforming part for processing and a main forming part for forming an upward-opening article packaging tray by erecting and adhering the peripheral part of the intermediate product processed by the preforming part. The material by the material supply section, adhesive application section,
It has a pre-forming section and a conveying mechanism for sequentially feeding it to the main forming section, and the material supply section, the adhesive applying section, the pre-forming section, and the main forming section are based on the time point when the conveying start timing of the conveying mechanism starts last time. In the step (1), the timer means is set to be equal to or longer than the molding time until the end of each process work, and the transfer mechanism is set based on the time set by the timer means. A tray forming machine, which is provided with a controller for driving. 2. A material take-out detecting means for detecting whether or not the material is taken out by the material supplying section, a coating position detecting means for detecting whether or not the material is being supplied to the adhesive coating section, and just before the main molding section. And a pre-molding detection means for detecting whether or not the material is conveyed to the position, and when any one of the detection means detects the material, the conveying mechanism is based on the time point when the movement is started last time. Is set to be equal to or longer than a molding time until the respective process operations in the material supplying section, the adhesive applying section, the preforming section, and the main molding section are completed or longer than that. The tray forming machine according to claim 1, further comprising: a timer unit and a controller that drives the transport mechanism based on a time set by the timer unit.