JPH10146899A - Double straw producing apparatus equipped with assembling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double straw manufacturing apparatus for inserting an inner pipe into a molded outer pipe to produce a double straw. SOLUTION: An insertion device 27 of the assembling device 14 in a double straw manufacturing apparatus has a holding guide member 80 for preventing the falling of the double straw 5 wherein the inner pipe 2 arranged to a feed drum 26 is partially inserted in an outer pipe 1 and frictionally coming into contact with the outer pipe 1 to prescribe the axial movement of the outer pipe 1 and the truncated cone roll pushing the end part 82 of the inner pipe 2 so that the inner pipe 2 is inserted into the outer pipe 1 held by the feed drum 26. The end part 82 of the inner pipe 2 partially inserted into the outer pipe 1 held to the feed drum 26 is moved from the small diameter part of the conical surface 85 of a truncated cone roll to the large diameter part thereof according to the rotation of the feed drum 26 to insert the inner pipe 2 into the outer pipe 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an assembling device for inserting a double straw into an outer tube by inserting the inner tube into the outer tube to produce a double straw consisting of an outer tube and an inner tube formed of a thermoplastic material. The present invention relates to a double straw manufacturing device.

[0002]

2. Description of the Related Art Conventionally, a double straw manufacturing apparatus has been used to produce a telescopic straw having a double structure in which an inner tube is slidably inserted into an outer tube, that is, a double straw. And an end of the inner tube formed into an enlarged diameter. When the double straw is used for drinking, the inner tube is pulled out from the outer tube, and the enlarged diameter end of the inner tube is locked to the reduced diameter end of the outer tube to increase the length of the straw itself. When the inner tube is pulled out from the outer tube, if the pushing force on the inner tube is applied to the inner tube, the inner tube enters the outer tube. Is formed to form an engaging portion that abuts against and locks. Furthermore, the double straw, in the contracted state where the inner tube is inserted into the outer tube,
A curled portion having a reduced diameter is formed at the end of the outer tube in order to prevent the end of the inner tube from engaging and preventing the inner tube from falling off the outer tube.

[0003] Usually, double straws are individually packaged with a packaging film made of polyethylene or the like, and a straw pack in which the double straw is packaged with a packaging film is affixed to a beverage container or the like and is available on the market or the like. Therefore, the double straw produced by the double straw manufacturing device is
They are sequentially sealed and packaged at a predetermined interval on a long band-shaped packaging film, and are produced in a double straw packaging band. When double straws are individually attached to a beverage container or the like, each straw pack is cut individually from the double straw packaging band, and the straw packs are fixed to the beverage container or the like with an adhesive or the like.

Conventionally, Japanese Patent Publication No. 2-46205 discloses that
A double straw insertion method and apparatus are disclosed. The double straw insertion device includes a plurality of spiral rods having spiral grooves formed therein, and one of the inner and outer straws is moved straight along the spiral rods, and the other is dropped into the spiral grooves to form a spiral. It is placed on a rod, and the other rod is rotated diagonally forward by rotating the spiral rod, and the component speed in the direction along the spiral rod is almost equal to the straight traveling speed of one straw, and is conveyed. While rotating the inner straw on a plane, the inner straw is inserted into the outer straw from the sharp end portion.

[0005]

By the way, as described above, a double straw manufacturing apparatus forms end portions of an inner tube and an outer tube constituting a stretchable double straw, and forms each end portion. Various types are known which are assembled by inserting an inner tube into an outer tube later. However, many of these double straw manufacturing apparatuses have a complicated structure, and many of them have a lack of accuracy in the insertion process, and a large number of defective products may be generated, which cannot be said to be sufficient. there were. Further, after inserting the inner tube into the outer tube and assembling them into double straws, when packaging those double straws with a packaging film, the assembling device and the packaging device are linked in any way so that the double straw can be smoothly and automatically doubled. There was a problem how to construct a series of manufacturing systems for producing straws.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to form ends of an inner tube and an outer tube made of a thermoplastic material, insert the inner tube into the outer tube, and connect the other end of the outer tube. When assembling a double straw by curling the diameter of the portion, first, partially insert the inner tube into the outer tube, and then hold the end of the inner tube in a state where the outer tube of the double straw in a half-inserted state is held. To provide an assembling apparatus which presses the inner tube completely into the outer tube by pressing the inner tube into the outer tube and assembles it into a double straw, thereby reducing the frequency of defective products and producing the double straw smoothly and accurately. Further, when a packaging device is provided downstream of the double straw assembling device, the double straw fed from the assembling device is temporarily put on standby to smoothly associate with the packaging device. The packaging film Therefore, it is possible to sequentially package at a predetermined interval, and it is possible to smoothly and automatically perform a series of forming, assembling and packaging of double straws, and furthermore, to improve the working environment and configure a preferable system for sanitary management. It is an object of the present invention to provide a double straw manufacturing apparatus provided with an assembling apparatus capable of being manufactured.

According to the present invention, there is provided a forming device for forming ends of an inner tube and an outer tube made of a thermoplastic material, and an assembling device having an inserting device for inserting the inner tube into the outer tube. The apparatus comprises: a transport drum configured to transport a double straw partially inserted into the outer pipe into the outer pipe in a U-shaped groove; and the U-shaped double straw disposed in the U-shaped groove of the transport drum. A holding guide member extending along the peripheral surface of the transport drum to prevent falling from the groove and restricting the outer tube from moving in the axial direction due to frictional contact with the outer tube; and the transport drum The present invention relates to a double straw manufacturing apparatus comprising a frusto-conical roll that presses the end of the inner tube with a conical surface so as to insert the inner tube into the outer tube held in the outer tube.

In this double straw manufacturing apparatus, the axis of the rotating shaft of the frusto-conical roll is set so as to extend substantially perpendicularly to the axis of the rotating shaft of the transport drum, and is held by the transport drum. The end of the inner tube partially inserted into the outer tube moves from the small diameter portion to the large diameter portion of the conical surface of the frusto-conical roll according to the rotation of the transport drum, and the inner tube becomes the outer tube. Inserted into

The above-mentioned forming device is a locking portion forming device for forming a locking portion on the outer tube at a predetermined position from an end thereof and on the entire circumference or partially of the outer tube. A diameter reducing molding device for reducing the diameter of the end portion and a diameter increasing molding device for increasing the diameter of the end portion of the inner tube are provided.

[0010] The assembling apparatus includes an insertion roll for partially inserting the inner tube, which is arranged in a U-shaped groove of the conveying drum of the forming device, into the outer tube.

Further, the assembling apparatus has a curling device for curling an end portion of the outer tube into a reduced diameter state with the inner tube inserted into the outer tube.

Further, in the downstream of the assembling apparatus, a standby device for temporarily stocking the double straw fed from the assembling apparatus, and the double straws are sequentially wrapped with a wrapping film at predetermined intervals to form a double straw. A packaging device for forming a packaging band is provided.

[0013] Further, this double straw manufacturing apparatus includes:
In order to feed the inner tube and the outer tube housed in the cartridge to the transport drum through the hopper, a feeding device provided with a bridge prevention roll and a bite prevention roll is provided.

Since the double straw manufacturing apparatus provided with the assembling apparatus according to the present invention is configured as described above,
When the end of the outer pipe sent out from the hopper is formed into a reduced diameter, and the outer pipe having no locking portion at the outer pipe end is supplied from the hopper, the inner pipe is expanded at the outer pipe end. Forming a locking portion for locking to the end, expanding the end of the inner pipe sent out from the hopper, and then forming the inner pipe on the formed outer pipe smoothly and gradually by the function of a frusto-conical roll. A double straw can be produced by inserting the double straw securely, the occurrence of defective products such as poor insertion can be reduced, and a series of manufacturing steps can be smoothly and promptly achieved. Further, a double straw manufacturing apparatus of a type in which a packaging apparatus is installed downstream of the assembling apparatus, by providing a standby apparatus between the assembling apparatus and the packaging apparatus, it is possible to smoothly link both apparatuses, The straw can be wrapped with a wrapping film to automatically and quickly produce a double straw wrapping band.

Therefore, this double straw manufacturing apparatus is
The outer tube and the inner tube are each formed on the material from the straight straw member, and the formed outer tube and the inner tube are assembled into a double straw, and the assembled double straw is wrapped. A series of manufacturing processes can be automatically and continuously achieved. In addition to being able to confirm immediately by the signal, the cartridge can be immediately replaced, and the bobbin of the material film or the packaging film can be replaced with a new one, so that the production can be continued.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a double straw manufacturing apparatus provided with an assembling apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an embodiment of an assembling apparatus in a double straw manufacturing apparatus according to the present invention, and FIG.
1 is a front view of the assembling apparatus of FIG. 1, FIG. 3 is a front view showing an embodiment of a double straw manufacturing apparatus incorporating the assembling apparatus of FIG. 1, and FIG. 4 is a molding apparatus and an assembling apparatus in the double straw manufacturing apparatus of FIG. FIG. 5 is a front view showing a device for feeding the outer tube and the inner tube from the hopper to the forming device, FIG. 6 is a side view of the device for feeding in FIG. 5, and FIG. 7 is an insertion device in this double straw manufacturing device. FIG. 8 is an explanatory view showing a step of inserting an inner tube into an outer tube by an insertion roll in the insertion device of FIG.

The apparatus for manufacturing a double straw according to the present invention comprises a molding step A for molding the ends of an outer tube 1 and an inner tube 2 made of a thermoplastic material such as polypropylene.
After the insertion, the other end of the outer tube 1 is curled to produce a double straw 5, and a standby state for temporarily stocking the double straw 5 that has passed through the assembly step B in order to adjust the linkage with the packaging step D Process C and a series of systems for accomplishing a packaging process D in which the double straws 5 are sequentially sealed at predetermined intervals by the packaging films 6 and 7 to produce the double straw packaging band 8 and take up the same. It is. In this embodiment, the outer tube 1 and the inner tube 2 are formed with a reduced-diameter portion and a locking portion at the end of the outer tube 1 by the forming device 9, and a larger-diameter portion is formed at the end of the inner tube 2. It is described as a type of double straw manufacturing apparatus. Or,
As another embodiment, for example, Japanese Patent Application No. 8-275352 or Japanese Patent Application No. 8-275353 filed by the present applicant earlier.
In this case, a manufacturing apparatus of a type which does not include the locking part forming device 70 can be used. Can be applied by using

In the forming step A, the outer tube 1 and the inner tube 2 are fed out from each supply source, and a large-diameter portion is formed at one end of the inner tube 2 and a reduced-diameter portion is formed at one end of the outer tube 1. I do. In the assembling device B, the inner tube 2 is inserted into the outer tube 1 and assembled into a double straw 5 to prevent the inner tube 2 from dropping from the outer tube 1 after the insertion of the inner tube 2 into the outer tube 1 is completed. In addition, the other end of the outer tube 1 is curled to reduce the diameter in order to smooth the mouthpiece.
In the standby process C, the double straw 5 is temporarily put on standby in order to smoothly link the assembly process B and the packaging process D. Further, in the packaging step D, the waiting double straws 5 are sequentially fed out at predetermined intervals onto the packaging film 6, and the double straws 5 are loaded into the bag portion 16 formed of the packaging film 6, and then the packaging is performed. Bag part 1 of film 6
The packaging film 7 is superimposed on the packaging film 6 so as to enclose the double straw 5 loaded in 6, and thereafter,
In order to seal each double straw 5 in the bag part 16, the packaging films 6 and 7 around the respective double straws 5 are heat-bonded to each other to form a double straw packaging band 8, and then the double straw packaging band 8 is removed. It is wound around a winding bobbin 63.

This double straw manufacturing apparatus comprises a molding apparatus 9 for molding the ends of an outer pipe 1 and an inner pipe 2 made of a thermoplastic material, and the other end of the outer pipe 1 by inserting the inner pipe 2 into the outer pipe 1. An assembling device 14, which assembles a double straw by curling the diameter of the part,
A standby device 10 for temporarily stocking the double straw 5 fed from the assembling device 14; and a packaging device for forming the double straw packaging band 8 by sequentially sealing the double straws 5 at predetermined intervals with packaging films 6 and 7. 11. This double straw manufacturing device is particularly suitable for an insertion device 2 for inserting the inner tube 2 into the outer tube 1.
7 is characterized by an assembling apparatus 14 having a.

This double straw manufacturing apparatus is provided with an insertion roll 48 at a position facing the transport drum 21 for pushing the inner pipe 2 into the outer pipe 1 by about 3/4. The insertion roll 48 is attached to a rotating shaft 90 that is driven to rotate via a pulley 91. The insertion roll 48 first comes into frictional contact with the peripheral surface of the distal end of the inner tube 2 as shown in FIG. 8A, and then, as shown in FIG. As shown, the inner pipe 2 is slid along the U-shaped groove 47 and inserted into the outer pipe 1, and the rear end of the inner pipe 2 is completely inserted into the outer pipe 1 as shown in FIG. The inner tube 2 is inserted into the outer tube 2 until the inner tube 2 is not inserted into the outer tube 2, for example, a state where the inner tube 2 protrudes by about ３. At this time, the U-shaped groove 47 in which the inner tube 2 is arranged is formed to be shallower by the thickness of the outer tube 1 than the U-shaped groove 47 in which the outer tube 1 is arranged, and the inner tube 2 is smoothly inserted into the outer tube 1. Is done. Next, the double straw 5 in a state where the inner pipe 2 fed out from the transport drum 21 is partially inserted into the outer pipe 1 is guided by the guide member 81 and is transported by the transport drum 2.
It is sent to 6. The assembling device 14 comprises an insertion device 27 that completely pushes the inner tube 2 into the outer tube 1 on the transport drum 26 to form the double straw 5,
Is provided with a curling device 13 for curling the other end of the outer tube 1 into a reduced diameter state in a state where is inserted into the outer tube 1.

In this double straw manufacturing apparatus, the insertion device 27 comprises a frusto-conical roll 41 for inserting the inner tube 2 into the outer tube 1 and a motor 42 for driving the frusto-conical roll 41. The insertion device 27 is, in particular, a transport drum 26 for transporting the double straw 5 partially inserted into the outer tube 1 from the transport drum 21 of the molding device 9, and a double drum arranged on the transport drum 26. A holding guide member 80 extending along the peripheral surface of the transport drum 26 and fixed to a support frame 87 via a support member 86 so as to prevent the straw 5 from dropping and restrict movement in the axial direction; The end 82 of the inner tube 2 is pushed with a conical surface 85 so that the inner tube 2 is inserted into the outer tube 1 held in the axial direction by the holding guide member 80 and the holding member 80, and is inserted into the machine base 87 via the support member 86. It comprises a fixed frustoconical roll 41.

The supporting member 8 for supporting the holding guide member 80
6 is an adjusting screw 9 that can adjust the height of the holding guide member 80 so that the interval with respect to the transport drum 26 can be adjusted.
2 and is fixed to the support frame 87 by a nut 93 screwed into the adjusting screw 92. The truncated conical roll 41 is formed integrally with a drive pulley (rotary shaft) 83 rotatably supported by a support member 86 fixed to a support frame 87, and the inner pipe 2 is provided on the conical surface 85 with the outer pipe 1. A serration (not shown) is formed so as to assure the indentation. The drive pulley 83 is driven to rotate at a variable speed via a belt 88 (FIG. 4) by the drive of the motor 42, and is configured so that the rotation of the transport drum 26 and the rotation of the frusto-conical roll 41 match. The peripheral speed of the conical surface 85 of the conical roll 41 is set to be faster than the peripheral speed of the transport drum 26, and smooth insertion of the inner tube 2 into the outer tube 1 is achieved.

The transport drum 26 is formed with a U-shaped groove 47 having an R surface into which the double straw 5 is loaded and having a depth slightly smaller than the outer diameter of the outer tube 1 of the double straw 5.
The holding guide member 80 prevents the double straw 5 from dropping from the U-shaped groove 47 of the U-shaped groove 47 of the conveying drum 26 located below the conveying drum 26 and is disposed in the U-shaped groove 47. The outer straw 1 comes into frictional contact with the outer pipe 1 of the double straw 5, and the axial movement of the outer pipe 1 can be restricted while allowing the forced movement of the outer pipe 1 in the rotation direction. In some cases, a vacuum hole is formed in each of the U-shaped grooves 47 so that the double straws 5 are accurately caught by the U-shaped grooves 47 by negative pressure and are sequentially transferred by the transport drum 26. it can. Furthermore, a frusto-conical roll 4
The axis O _L of the first rotary shaft 83 is set so as to extend in a direction substantially perpendicular to the axis O _D of the rotary shaft 84 of the transfer drum 26. The end 82 of the inner tube 2 partially inserted into the outer tube 1 held by the transport drum 26 moves from the small diameter portion of the conical surface 85 of the frustoconical roll 41 to the large diameter portion as the transport drum 26 rotates, Thereby, the inner tube 2 is completely inserted into the outer tube 1.

Prior to the insertion device 27, the assembling device 14 has an insertion roll 48 for partially inserting the inner tube 2 arranged in the U-shaped groove 47 of the conveying drum 21 of the molding device 9 into the outer tube 1. doing. Furthermore, the assembling device 14 has a curling device 13 that curls the end of the outer tube 2 to a reduced diameter state with the inner tube 2 completely inserted into the outer tube 1. The double straw 5 is transferred from the U-shaped groove 47 of the transport drum 26 to the U-shaped groove 47 of the transport drum 51 by being guided by a guide member 88.

The curling device 13 comprises a transport drum 51 for transporting the double straw 5, a forming drum 52 having a curl forming die 53 arranged opposite to the transport drum 51, and a holding belt 49. Curl mold 53
In order to further push the inner tube 2 inserted into the outer tube 1, the inner tube 2 is pushed in by using the enlarged diameter end of the inner tube 2 and the end of the outer tube 1 is formed by curling. Curl device 1
3 has a rounded end on the drinking side of the outer tube 1 so that the mouthfeel is good when the double straw 5 is used.
The end of the outer tube is curled inward into an R shape, and the outer tube 1 is curled.
A locking portion for preventing the inner tube 2 from dropping off from is formed. In the downstream of the assembling apparatus 14, the assembling apparatus 1
There is provided a standby device 10 for temporarily stocking the double straws 5 fed from 4 and a packaging device 11 for sequentially wrapping the double straws 5 at predetermined intervals with the wrapping films 6 and 7 to form the double straw wrapping band 8. ing.

This embodiment is of a type provided with a locking portion forming device 70, and the locking portion forming device 70 is partially formed in a circumferential direction at a predetermined position from the end of the outer tube 1. Alternatively, the locking portion can be formed around the entire circumference in the circumferential direction. As the locking portion forming device 70 for partially forming the locking portion in the circumferential direction of the outer tube 1, for example, a beverage straw forming device disclosed in Japanese Patent Application No. 8-142305 according to the present applicant is applied. can do. The locking portion forming device 70 for forming the locking portion in the entire circumferential direction of the outer tube 1 is, for example, a beverage straw forming device disclosed in Japanese Patent Application No. 8-142306 of the present applicant. Can be applied. Therefore, in this embodiment, a detailed description of the locking portion forming device 70 is omitted.

In this double straw manufacturing apparatus, a hopper 4 on which a cartridge 3 containing an outer tube 1 is set.
A hopper 44 on which the cartridge 3 containing the inner tube 2 and the inner tube 2 is set is provided on a common transport drum 19 that transports the outer tube 1 and the inner tube 2 respectively. The engaging portion forming device 70 is located on the downstream side of the hopper 43 in which the cartridge 3 containing the outer tube 1 is set, and is disposed on the upstream side of the forming drums 22 and 23 of the forming device 9.
It is provided in. The inner pipe 2 and the outer pipe 1 housed in the cartridges 3 and 4 are transferred from the hoppers 43 and 44 to the transfer drum 1.
As shown in FIG. 5, a feeding device provided with a roll 45 for preventing bridge and a roll 46 for preventing bite is provided for the transport drum 19 in order to smoothly feed into the feeding drum 9.

The bridge-preventing roll 45 is connected to the U
The outer pipe 1 or the inner pipe in the hoppers 43 and 44 is positioned upstream of the transport drum 19 composed of a vacuum roll provided with a groove 47 and is rotated in a direction of pushing the outer pipe 1 or the inner pipe 2 into the transport drum 19. 2 are sequentially loaded into the U-shaped groove 47 on the roll surface so that the bridge phenomenon does not occur. The bite prevention roll 46 is disposed with a proper gap between the roll surface and the vacuum roll surface of the transport drum 19 on the downstream side of the transport drum 19, and is opposite to the rotation direction of the transport drum 19. It is rotating at high speed. The cartridges 3 and 4 or the hoppers 43 and 44 are provided with sensors 32 and 33 including an alarm lamp, an alarm buzzer, and the like in order to detect a state in which the outer tube 1 and the inner tube 2 are stored. ing.
In response to signals from the sensors 32 and 33, the cartridges 3 and 4 approaching empty may be replaced with cartridges 3 and 4 in which the outer tube 1 and the inner tube 2 are sufficiently housed.

The engaging portion forming device 70 includes a conveying drum 19 constituting a straw conveying device supported on a rotating shaft and a forming pin transfer drum 6 disposed opposite to the conveying drum 19.
7 (FIG. 4). Forming pin transfer drum 6
7, a forming pin holder 72 holding a forming pin 69 is held so as to be able to reciprocate in the axial direction by the action of the cam 71. The locking portion forming die 68 is attached to a support frame (not shown) in a non-rotating state, and includes an inner peripheral die and an outer peripheral die which are spaced so as to have an equal interval smaller than the outer diameter of the outer tube 1. It is composed of When the outer tube 1 passes through the gap in the arc-shaped running path in a non-rotating state, the concave locking portion is partially deformed by heating in the circumferential direction of the outer tube 1. Or,
When the outer tube 1 passes through the gap of the arc-shaped running path in a rotating state, the concave locking portion is heated and deformed in the circumferential direction of the outer tube 1 to be formed all around.

The forming device 9 includes, in addition to the above-described locking portion forming device 70, a reduced-diameter forming die 24 arranged to face the transport drum 21 and reducing the diameter of one end of the outer tube 1. It comprises a forming drum 22 and a forming drum 23 provided with a large-diameter forming die 25 that is arranged to face the transport drum 21 and expands one end of the inner tube 2. Transport drum 19,
20 and 21 are configured so that the outer tube 1 is conveyed to one side and the inner tube 2 is conveyed to the other in the width direction, and the R surface on which the outer tube 1 and the inner tube 2 are respectively loaded is formed. U-shaped groove 4
7 are formed. The U-shaped groove 47 has a vacuum hole 8
9 are respectively formed, and the outer tube 1 and the inner tube 2 are accurately caught by the negative pressure and are sequentially transferred. The forming drum 22 arranged with respect to the transport drum 21 constitutes a forming device for reducing the diameter of the end of the outer tube 1. As a molding device, for example, a straw end molding device disclosed in Japanese Patent Application No. 7-213077 can be used, and therefore detailed description is omitted here.

The molding apparatus for expanding the diameter of the end of the inner tube 2 can have the same structure except that the molding die is different. Since the outer tube 1 and the inner tube 2 are prevented from escaping during the forming of the outer tube 1 and the inner tube 2 and are held in the U-shaped groove 47, the holding speed at which the peripheral speed is the same as that of the transfer drum 21 is formed. A belt 49 is provided. Diameter reduction mold 24
Is guided by the cam 50 according to the rotation of the forming drum 22, inserted into the end of the outer tube 1 and then pulled out,
The end of the outer tube 1 is reduced in diameter. In addition, the expanding mold 25
Is guided by the cam 50 according to the rotation of the forming drum 23, inserted into the end of the inner tube 2, and then pulled out,
The end of the inner tube 2 is expanded and formed. The double straw 5 fed from the transport drum 21 is sent to the transport drum 26 of the assembling device 14 as described above, and is sent to the curling device 13 after the inner tube 2 is completely inserted into the outer tube 1.

The double straw 5 fed from the curling device 13 is sent to a conveyor 36 driven by a pulley 40. The transport conveyor 36 is provided with a trapezoidal projection on the double straw transport surface, and the double straws 5 are arranged at the bottom of the trapezoid and transported in alignment. The speed of the transport conveyor 36 is adjusted to a speed at which the double straw 5 falling from the curl forming roll constituting the curling device 13 can be received at the bottom of the trapezoid. Further, static electricity removing devices 35 for removing static electricity generated in the double straws 5 are provided on the transport conveyor 36 at two locations, that is, upstream and downstream thereof. The static eliminator 35 is composed of static elimination electrodes for eliminating static electricity generated in the double straw 5 by discharging an AC high voltage. The double straw 5 fed to the transport conveyor 36 is provided with a sensor 34 for detecting whether the double straw 5 itself is a non-defective product or a defective product. The sensor 34 is composed of, for example, four optical sensors, and forms the double straw 5, the assembled state of the outer tube 1 and the inner tube 2, the presence of a defective portion, the unassembled outer tube 1 or inner tube 2. Only a good or defective product such as a defective product is detected, and the defective product is controlled by the sensor controller 37 and the air nozzle 39 is activated by the operation of the solenoid valve 38 (FIG. 4).
Is discharged from the line of the conveyor 36 by the air pressure from

The standby device 10 constitutes a standby station, and the double straw 5 fed from the curling device 13 is used in order to link the assembling process B and the packaging process D well.
Is a station that temporarily waits. Standby device 1
At 0, a standby hopper 17 for temporarily stocking the double straws 5 sent from the curling device 13 is provided. The double straw 5 accommodated in the standby hopper 17 is a transport roll 1 composed of a vacuum roll.
8 and sequentially fed into the packaging drum of the packaging device 11.

The packaging device 11 includes a packaging drum 30 for arranging the double straws 5 fed from the standby device 10 in the bag portions 16 sequentially formed at predetermined intervals on the packaging film 6 fed from the source bobbin 28. The packaging film 7 unwound from the source bobbin 29 with respect to the packaging film 6 in which the double straws 5 are arranged in the bag portion 16
Device 15, double straw 5
Sealing device 31 for forming the double straw packaging band 8 by heating and bonding the packaging films 6 and 7 around the double straw 5 to each other so as to seal the inside of the double straw packaging 5, and winding the double straw packaging band 8 It is composed of a taking device 12.

The packaging drum 30 has an R-shaped U-shaped groove 47 on the drum peripheral surface capable of accommodating the double straw 5 at intervals of the packaging pitch of the double straw 5, and a vacuum hole formed in the U-shaped groove 47. . A film insertion roll 55 having a projection 54 provided at the same pitch as the U-shaped groove 47 is disposed facing the packaging drum 30. When the packaging film 6 is inserted into the U-shaped groove 47 of the packaging drum 30 by the projection 54 of the film insertion roll 55, the packaging film is drawn into the U-shaped groove 47 by vacuum sucked through the hole formed in the U-shaped groove 47 of the packaging drum 30. 6 are formed. Further, the double straw 5 fed from the transport roll 18 of the vacuum roll is pushed into the bag portion 16 of the packaging film 6 formed on the packaging drum 30 by the pushing belt 56. In the downstream portion of the packaging drum 30, a stacking device 15 including a roll 58 for stacking the packaging film 7 positioned on the upper side unwound from the source bobbin 29, and the packaging film 7 stacked on the packaging film 6. A film heat seal roll 57 for heating and joining the region between the double straws 5 is provided. The film heat sealing roll 57 heats and joins the packaging films 6 and 7 so as to divide each of the double straws 5 loaded in a ladder shape into the double straw packaging band 8, and the roll surface is a U-shaped packaging drum 30. It has teeth that are aligned between the grooves 47, the roll surface of the teeth is silicon-processed, and a heater is built in the roll to control the temperature to a predetermined appropriate temperature.

Further, a sensor 59 is provided for detecting the feeding state of the packaging films 6 and 7 and detecting the film breakage. In response to the detection signal from the sensor 59, an alarm is issued and the operation of the packaging device 11 is performed. Is controlled to stop. Next, the ladder-shaped double straw wrapping band 8 divided for each double straw 5 loaded in the bag portion 16 sent out from the packaging drum 30 is heated and joined on both sides in the longitudinal direction to seal it. Sent to. The double straw wrapping band 8 sent out from the sealing device 31 is cut into a predetermined widthwise size by the rotary cutter 60 on both side surfaces. The packaging state of the double straw wrapping band 8 formed in a predetermined size is detected by a sensor 61 composed of a microswitch or the like, and for example, a defective portion such as an empty bag where the double straw 5 is not loaded in the bag portion 16 is detected. At the same time, the sensor 66 installed at the final stage carries out an inspection of whether the final double state is good or not, issues an alarm in response to the sensors 61 and 66, and stops the winding device 12. The defective portion of the double straw wrapping band 8 is cut out and eliminated, and the cut end portions of the double straw wrapping band 8 are heated and joined by the heating joining device 65.

The take-up device 12 has a take-up bobbin 63 of a larger diameter mounted on a take-up shaft 64 that is driven to rotate, and a take-up disk 62 mounted on the take-up shaft 64. When no defective portion is detected in the double straw packaging band 8, the double straw packaging band 8 is wound on the winding bobbin 63 by the winding device 12 by the winding disk 6.
It is wound up along 2. The winding device 12 winds up the double straw wrapping band 8 by rotating the winding shaft 64, and counts the number of winding rotations, and the torque of the winding shaft 64 of the winding device 12 is adjusted according to the winding diameter. The tension is automatically controlled, and the tension of the double straw packaging band 8 is uniformly controlled from the start of winding to the end of winding.
When the double straw wrapping band 8 is wound up to a predetermined diameter, the winding device 12 is stopped. The wound double straw packaging band 8 is wound on the winding shaft 64 of the winding device 12.
By removing the winding bobbin 63 from the double straw wrapping band 8 and then removing the winding bobbin 63 from the double straw wrapping band 8, the pressing force at the core of the double straw wrapping band 8 is released, and it is positioned at the core of the double straw wrapping band 8. The crushing of the bag portion 16 is prevented.

[0038]

Since the double straw manufacturing apparatus according to the present invention is constructed as described above, the end of the outer tube and the inner tube is formed by the forming device, and the end is formed into the formed outer tube. The pipe can be inserted into the double straw for quick and smooth assembly, and the occurrence of defective products can be reduced. Further, following the assembling step of the double straw, the double straw can be enclosed in a packaging film to produce a double straw packaging strip, and a series of steps are automatically and successively executed. That is, according to the present invention, a series of systems for forming an outer tube and an inner tube from a straw member, assembling the inner tube into the outer tube, and packaging a double straw can be automated, and a series of lines can be manufactured smoothly. In addition to reducing the flow of products and the occurrence of defective products, the molded state, built-in state and packaging state of manufactured products can be inspected with sensors installed at optimal positions, and when defective products are generated, they are removed from the line each time, The double straw wrapping band of the final product is very good and reliable. Therefore,
INDUSTRIAL APPLICABILITY The double straw manufacturing apparatus according to the present invention can continuously and mass-produce drinking straws, can achieve a reduction in personnel and manufacturing costs, and can provide a system that is extremely favorable in terms of work safety and food hygiene. Further, a double straw having a size required by a user or a consumer can be easily and appropriately manufactured.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an assembling apparatus in a double straw manufacturing apparatus according to the present invention.

FIG. 2 is a front view of the assembling apparatus of FIG. 1;

FIG. 3 is a front view showing an embodiment of a double straw manufacturing apparatus incorporating the assembling apparatus of FIG. 1;

FIG. 4 is a plan view showing a forming device and an assembling device in the double straw manufacturing device of FIG. 3;

5 is a front view showing an apparatus for feeding an outer pipe and an inner pipe from a hopper to a molding apparatus in the double straw manufacturing apparatus of FIG. 3;

FIG. 6 is a side view of the feeding device of FIG. 5;

FIG. 7 is a schematic explanatory view showing an insertion device in the double straw manufacturing apparatus.

8 is an explanatory view showing a step of inserting an inner tube into an outer tube by an insertion roll in the insertion device of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Outer pipe 2 Inner pipe 5 Double straw 6,7 Packaging film 9 Molding device 10 Standby device 11 Packaging device 13 Curl device 14 Assembling device 16 Bag part 18 Transport roll 26 Transport drum 27 Insertion device 41 Truncated conical roll 43,44 Hopper 45 bridge preventive roll 46 bites preventive roll 47 U-shaped groove 48 inserted roll 80 ends 85 the conical surface of the guide member 82 within the tube O _L, O _D axis

Continuation of front page (72) Inventor Masami Abe 1-3-15 Miyagi, Adachi-ku, Tokyo Toyo Cap Manufacturing Co., Ltd.

Claims (7)

[Claims] 1. A molding device for molding the ends of an inner tube and an outer tube made of a thermoplastic material, and an assembling device having an insertion device for inserting the inner tube into the outer tube, wherein the insertion device is A transport drum for transporting the inner straw with the double straw partially inserted into the outer pipe being arranged in a U-shaped groove;
To prevent the double straw disposed in the U-shaped groove of the transport drum from falling from the U-shaped groove and to restrict the axial movement of the outer tube by frictionally contacting the outer tube. A holding guide member extending along the peripheral surface of the transfer drum, and a frusto-conical roll that presses the end of the inner tube with a conical surface so as to insert the inner tube into the outer tube held by the transfer drum. A double straw manufacturing apparatus characterized in that: 2. An axis of a rotation axis of the frusto-conical roll is set to extend in a direction substantially perpendicular to an axis of a rotation axis of the transport drum, and part of the outer tube held by the transport drum. The end of the inserted inner tube moves from the small-diameter portion to the large-diameter portion of the conical surface of the frusto-conical roll according to the rotation of the transport drum, and the inner tube is inserted into the outer tube. The double straw manufacturing apparatus according to claim 1, wherein 3. The locking unit forming device for forming a locking portion on the outer tube at a predetermined position from an end thereof and on the entire circumference or partially of the outer tube. 3. The apparatus according to claim 1, further comprising a diameter reducing device for reducing the diameter of the end of the tube, and a diameter expanding device for increasing the diameter of the end of the inner tube.
2. The double straw manufacturing apparatus according to 1. 4. The apparatus according to claim 1, wherein the assembling apparatus includes an insertion roll for partially inserting the inner tube, which is arranged in a U-shaped groove of a conveying drum of the forming device, into the outer tube. The double straw manufacturing apparatus according to any one of claims 3 to 3. 5. The assembly device according to claim 1, wherein said assembling device includes a curling device for curling an end portion of said outer tube into a reduced diameter state with said inner tube inserted into said outer tube.
The double straw manufacturing apparatus according to any one of the above. 6. In the downstream of the assembling apparatus, a standby device for temporarily stocking the double straw fed from the assembling apparatus, and the double straws are sequentially wrapped with a wrapping film at predetermined intervals. The double straw manufacturing device according to any one of claims 1 to 5, further comprising a packaging device for forming a packaging band. 7. A feeding device provided with a bridge prevention roll and a bite prevention roll for feeding the inner tube and the outer tube housed in the cartridge to the transport drum through the hopper. The double straw manufacturing apparatus according to any one of claims 6 to 6.