JPH0637204B2 - Device for applying hot-melt adhesive to strip-shaped continuous packages - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is for transferring and applying a hot-melt adhesive to a strip-shaped package in which rod-shaped products such as straws are continuously packaged at regular intervals. Regarding the device.

[Conventional technology]

As a container for selling juice, milk, etc., a paper container called a pack container as shown in FIG. 6 is currently used. When selling juice or milk in such a packaging container (A), a straw is often attached to this container as an accessory, but for reasons of hygiene, the straw is usually packaged in a small bag. It is affixed to the side wall of the container in the state of being attached. There is also a case where yogurt, frozen dessert, or the like is put in another type of packaging container, and a spoon made of synthetic resin is packaged and attached to the outer surface of the container.

Such a package is usually packaged individually with straws or spoons one by one, or with a plurality of straws or other rod-shaped objects enclosed in parallel and at regular intervals between two superposed films. There is a package (see Fig. 4), and in this case, the continuous package (D) is divided between the rod-shaped products to separate each rod-shaped product into individual packages (E) described above. It is designed to be attached to the container (A).

Containers for individual packages (E) in small sachets from the above continuous packages (D)
Conventionally, for example, Japanese Patent Publication No.
As shown in Japanese Patent Publication, a hot-melt adhesive is sprayed onto the bonding points on the side of a container that is previously conveyed on a conveyor line, and individual packages cut from continuous packages are moved and pasted on the side of the container. However, in order to improve the maintenance and cost, the applicant has previously filed Japanese Patent Application No. 59-190300 to a flat film surface opposite to the protruding portion of the continuous package in advance. A hot-melt adhesive with a melting point lower than the melting point of the film is coated continuously in the longitudinal direction of the strip (D), and both sides of the protruding part of the package (E) are pressed by a heating member of a specified size. We are proposing and implementing what is attached (see FIG. 4, FIG. 5, and FIG. 6).

Thus, the coating of the continuous package of the hot-melt adhesive on the sticking surface of the continuous package is performed by using a coating device having a coating roller having a large number of bead-shaped recesses on the outer peripheral coating surface which has been conventionally sold. I'm doing this. In the coating apparatus, a flat plate is arranged above the coating roller so as to face the coating surface on the outer circumference of the roller, and an appropriate gap is provided between the coating surface and the coating surface so that the coating material can pass through. It is designed to prevent floating from the application roller.

[Problems to be solved by the invention]

Conventionally used applicators are exclusively for flat strips, and those with uneven surfaces such that straws and other strips are packaged with one side protruding at regular intervals. Not not. Therefore, when a product having an uneven surface is transferred, it is affected by vibration, which causes an error in transfer of the hot-melt adhesive (hereinafter referred to as "hot melt") from the coating roller, resulting in a hot melt of the strip-shaped continuous package. The hot melt could not be evenly transferred to the coating area, and defects such as fading, skipping, and bleeding often occurred.

The present invention has been made in view of the above points, and an object of the present invention is to provide an apparatus capable of uniformly transferring a fixed amount of hot melt beet to a continuous package.

[Means for solving problems]

Technical means of the present invention, a continuous strip-shaped package (D) transferred by the transfer means, that is, a large number of straws and other rod-shaped products (B) are two strip-shaped synthetic resin films (C ₁ ), (C ₂ )
Are arranged at regular intervals and in parallel between the two, and the straws and other rod-shaped objects (B) in order to house in a hermetically sealed state, the both films (C ₁ ), (C ₂ ) one surface stuck A coating roller (1) which receives the supply of the hot-melt adhesive, facing the transfer path for transferring the strip-shaped continuous package (D) in which (C ₁ ) is uneven and the other surface (C ₂ ) is flat. The coating roller (1) is rotated at the same circumferential speed as the transfer speed of the continuous package (D), and the continuous package (D) above the coating roller (1). )
An auxiliary roller is arranged at a position facing the coating roller (1) on the side of the uneven surface (C ₂ ) of the continuous package (D) on the outer periphery of the auxiliary roller (3). Around the recessed groove (3a) at the same interval as the protruding portion can be freely inserted and retracted, further auxiliary roller (3) the continuous package (D) on the coating roller (1) surface It is to press. Further, as another technical means of the present invention, the auxiliary roller (3) is provided regardless of whether the roller is provided with a concave groove (3a) into which the projecting portion of the package can be fitted, In the transfer means, a drive roller (5) is arranged on the delivery side of the continuous package (D), and a holding belt is provided at a position facing the drive roller (5).
(6) is provided so that the holding belt (6) holds the continuous package (D) together with the roller (5) and transfers it.

[Action]

In the apparatus of the present invention, when the continuous strip-shaped package is transferred, the lower surface of the package is transferred while contacting the outer peripheral upper surface of the coating roller (1) at the same speed, but the coating roller (1)
The auxiliary roller (3) at a position facing the concave groove (3a on the outer peripheral surface of the continuous package (D) has the same interval as that of the protruding part and the protruding part can be freely inserted and withdrawn. ) Is further provided, and the auxiliary roller (3) is configured to press the continuous package (D) so as to be in close contact with the surface of the coating roller (1), the continuous package (D) is , The protruding part containing the straw and other rod-shaped objects on top of it is the auxiliary roller (3)
It is transferred while being fitted in and out of the recessed part. At this time, since the auxiliary roller (3) constantly presses the strip-shaped continuous package (D) against the upper surface of the application roller (1) with an appropriate pressure, it tends to occur when the strip-shaped continuous package (D) having irregularities is transferred. Prevent being affected by various vibrations. That is, the continuous package is
Floating from the coating roller due to vibration during transfer is prevented in advance, and it is always transferred in close contact at the same speed as the outer peripheral surface of the coating roller (1), and the sticking surface of the continuous package having unevenness is faint. A certain amount of hot melt can be transferred evenly without causing problems such as jumps and drops.

On the other hand, an auxiliary roller (3) is provided above the application roller (1), and a continuous package (D) is provided regardless of whether or not the roller is provided with a recess (3a) into which the projecting portion of the package can be inserted and withdrawn. ) Is provided with a drive roller (5) on the delivery side, and further, a holding belt (6) is provided at a position facing the drive roller (5), and the holding belt (6) is used for the continuous package ( D) the drive roller (5)
Continuous band-like package (D) even when it is held and transferred with
Is always pressed by the auxiliary roller (3) from the side opposite to the coating surface, and is reliably held by the roller (5) and the holding belt (6) without being slipped. The continuous package is transferred at the same speed as the outer peripheral surface of the coating roller (1) while being in close contact with the coating roller (1).
It is possible to prevent the occurrence of defects such as blurring, skipping, and slipping on the sticking surface of (D) and to uniformly transfer a fixed amount of hot melt.

〔Example〕

 Embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a side view showing a main part of a coating apparatus of the present invention, FIG.
FIG. 4 is a perspective view showing a main part of the coating section, and FIG. 4 is a perspective view of an entire continuous package containing a large number of rod-shaped objects (straws).

In the figure, (D) is a thin film (C ₁ ) made of synthetic resin such as a thin strip of polypropylene or polyethylene with a predetermined width (l) that protrudes in only one side at regular intervals without plastic deformation. straw and other sticks to (B) (see FIG. 5) is housed in the cover the film (C ₁₎ of the strip in flat separate strip of film (C _2), both the strip film (C ₁ ),
(C ₂ ) is welded to each of the left and right side edges (C ₃ ), (C ₃ ) while welding each overlapped surface over the entire width with a flat overlapped surface between the protrusions. 2 strips of film
A continuous package in which a large number of straws and other rod-shaped materials (B) are enclosed between (C ₁ ) and (C ₂ ) in parallel and at regular intervals, and the flat strip-shaped film (C ₂ ) side On the surface of the film, a hot melt having a melting point lower than those of these films (C ₁ ) and (C ₂ ) is used.
Predetermined spacing (a) parallel to the left and right edges (C ₃ ) and (C ₃ ) of the film
A bead-shaped hot-melt adhesive (2a) is applied in a zigzag manner to a pair of strip-shaped areas (2), (2) having a predetermined width (b) and staggered to form an adhesive portion. This is cut by a predetermined machine such as a sticking device to be used as a single package (C), which is stuck to a container (A) and used (see FIGS. 5 and 6).

The strip-shaped continuous package (D) is a pair of unwinding reels at the end of the device, as shown in FIG.
The rolls are loaded in (10) and (10). This unwind reel
The roll-shaped strip-shaped continuous package (D) loaded in (10) is such that when the continuous package on one reel finishes hot-melt processing, it is not necessary to immediately load the roll on the other reel. The upper package is made to be continuously usable, and the used empty reel is loaded with the next roll during the transfer of the continuous package.

This strip-shaped continuous package (D) is guided by guide rollers (18) and (19), and a drive roller (5a) on the feeding side to the application roller (1) and a transfer direction of the drive roller (5a). Synchronous pulleys (16a) located in front of and behind the synchronous belt (6a) suspended on the synchronous belt (6a), which is the application surface of the application roller (1) while being sandwiched between the rollers. Be transferred to.

As shown in FIG. 2, the coating roller (1) is orthogonal to the transfer direction of the strip-shaped continuous package (D), and a pair of rollers (1), (1) are arranged at predetermined intervals, Each roller is provided with a plurality of bead-shaped recesses (1a) for hot melt around a predetermined width. The width of the bead-shaped recessed area of the pair of rolls is equal to that of the continuous package (D ) Corresponds to the predetermined width (b) on the sticking surface (see Fig. 4), and the interval between the recessed areas is also the predetermined width of the hot melt application areas (2), (2) of the continuous package (D). interval
It corresponds to (a).

These coating rollers (1), (1) are stored in the hot melt storage tanks (4), (4) installed in the main body of the device, and are melted by the hose (4a) from the hot melt tank (7). The hot melt of the pressure roller is pressure-fed to immerse the outer peripheral coating surface of the coating roller (1), and the hot melt applied to the bead-shaped recess (1a) by the clockwise rotation of the roller (1) is directed upward by a doctor (not shown). The film on the bottom surface of the continuous package (D) is scraped off and transferred in sequence to areas not required for transfer.
Transfer coating is applied to the (C ₂ ) surface. Above the coating rollers (1), (1), auxiliary rollers (3), (3) are provided so that they can be pressed with the continuous package (D) to be transferred interposed therebetween. The coating rollers (3), (3) are each provided with a concave groove (3a) around the outer periphery of which the protruding portions can be fitted and withdrawn at the same intervals as the protruding portions of the continuous package. ) And (3) are connected to the arm shaft (14) via the ball bearings (14a) at the arm base by the arms (9) and (9) facing each other on the outside. That is, with respect to the arm shaft (14), the arm (9),
(9) can be freely rotated. Also, an arm (8) shorter than both arms (9) and (9) is fixed to the arm shaft (14) at an intermediate position between the opposing arms (9) and (9), and the tip of the arm (8) is fixed. The long pin (8a) fixed to the center of the
A pin provided in the middle of the arms (9), (9) in the longitudinal direction.
The auxiliary rollers (3) and (3) are inserted into the hole (9a) having a diameter slightly larger than the diameter of (8a), and the rotation of the arm shaft (14) causes the auxiliary rollers (3) and (3) to be on the upper surface of the application rollers (1) and (1). It comes into contact with the upper surface of the continuous package (D) located at or is separated from the upper surface.

The tip end of the Pinton shaft (15a) of the air cylinder (15) is attached to the arm shaft (14) via the crank arm (14b) at the end of the arm shaft (14), and the compression to the air cylinder (15) is performed. By switching the air, the arms (9), (9) are rotated clockwise or counterclockwise. In the figure, pin (8a)
Is in a non-contact state in the hole (9a) of the arm (9), and is in a state of pressing the upper surface of the strip-shaped continuous package by the weight of the auxiliary roller (3) and the arm (9). Air cylinder
Control the inflow of air to (15) and use the pin (8) to open the hole in the arm (9).
It is possible to press the inner surface of (9a) and apply any suitable pressure to the upper surface of the continuous strip.

The auxiliary rollers (3), (3), the concave groove (3a) is sequentially inserted into and withdrawn from the protruding portion of the upper surface of the continuous package (1) located on the upper surface of the application roller (1), the protrusion The outer peripheral part between the concave grooves (3a) and (3a) of each auxiliary roller (3) is sequentially pressed to the film superposition part before and after the part, and when the continuous package moves, the package is always coated with the coating roller (1 ) It is designed to be close to the surface.

Therefore, the effect of vibration that tends to occur during transfer of uneven strips is completely eliminated, and continuous packaging (D)
Is transferred at a predetermined speed by a drive roller (5) described later, the coating roller (1) is moved at the same speed as the transfer speed.
Since the outer peripheral surface of the roller is designed to rotate, the hot melt filled in the bead-shaped concave portion of the outer peripheral surface of the application roller (1) does not shift exactly and the strip-shaped continuous package (D)
It is transferred to the film (2) surface on the back side of, and it is possible to completely prevent problems such as blurring, skipping, and missing. The application roller (1), the drive rollers (5), (5a), etc. are designed to rotate synchronously by a roller chain (not shown). The drive roller (5) is arranged at a predetermined distance on the delivery side of the continuous package from the application roller (1), and is arranged in the transfer direction of the continuous package (D) by the roller (5). A pair of synchronization pulleys (16), (16) and a synchronization belt (6) are arranged in the front and rear, similar to the above-mentioned drive roller (5a) for feeding, and the drive roller (5) The continuous package (D) is sandwiched between and and the synchronizing belt (6) for transfer. Nipple transfer of the continuous package (D) by the drive roller (5) located on the package delivery side from the application roller (1) and the synchronizing belt (6), and the drive roller (5a) on the package delivery side. And the sandwiching transfer of the package by the synchronization belt (6a), in both cases, the contact angle between the roller and the synchronization belt and the continuous package is increased to prevent slippage during transfer, and simply between the rollers. It is possible to prevent vibration that occurs when a belt-shaped material having an uneven portion is transferred. Each of the drive rollers (5) and (5a) is a roller whose outer peripheral portion is covered with rubber, and a timing belt made of rubber or synthetic resin is used as a synchronizing belt. Further, the drive rollers (5), (5a) are gear-connected to one of the corresponding two corresponding synchronizing pulleys, and further, the peripheral speed of the drive roller (5) on the sending side is set to the drive roller (5a) on the sending side.
By slightly increasing the outer peripheral speed (1% in design), the continuous package (D) is always kept in tension while being contacted with the application roller (1) so that the transfer of hot melt can be performed accurately. ing.

Further, between the pair of hot melt storage tanks (4) and (4) accommodating the coating roller (1), a suitable package is provided below the transfer path of the continuous package (D) from the back surface of the package. A lifting pin (22) is arranged with a lever (22a) fixedly attached to the tip at a distance, and the lever is rotatably arranged using an air cylinder (not shown), and When the rotation is stopped, the pair of auxiliary rollers (3) and (3) are lifted up by the air cylinder (15) and, at the same time, the lifting pin (2
2) Pivots upward to prevent the continuous package (D) from coming out of the groove (3a) on the lifting part in close contact with the auxiliary roller,
When the coating roller (1) is stopped, the contact portion between the coating roller and the continuous package is prevented from being overheated to prevent the package from being damaged.

Drive roller located on the delivery side of the application roller (1)
(5) and the transfer outlet by the synchronization belt (6), in order to perform cooling and drying after hot melt bead transfer to a continuous package, a cooling tower without a ceiling (12) is provided from above, Air for cooling and drying is blown upward from the blower outlet (13) at the bottom. Guide rollers (20), (20) and (21) are arranged vertically inside the cooling tower (12), and the continuous package (D) is suspended between them to guide the cooling tower (12). After being guided from below by a transfer roller (17) that rotates synchronously with the drive roller (5), etc., the winding reel (11)
It is designed to be wound up on. Incidentally, (23) is an operation panel for controlling each part of the apparatus.

In this way, the continuous package (D) becomes the unwind reel (10).
It is unwound and transferred, and the hot-melt bead is transfer-coated (coating) at the coating roller (1) part, cooled and dried while passing through the cooling tower, and wound on the take-up reel (11). Application roller for continuous package (D)
As described above, the transfer coating of hot melt beads by (1) is always performed in close contact with the coating roller without being affected by vibration, etc. The hot melt beads can be applied accurately and evenly without causing defects such as omission.

〔The invention's effect〕

As will be apparent from the above description, according to the present invention, a conventional adhesive coating device is used to form a strip-shaped continuous package in which a rod-shaped article such as a straw is projected so that only one side protrudes at regular intervals. When hot-melt transfer coating is applied, the strip-shaped continuous package is always transferred in close contact with the outer peripheral surface of the coating roller at the same speed as the outer peripheral surface, and the hot spot on the sticking surface of the package which has been apt to occur in the past. Faint melt bead,
It is possible to prevent defects such as jumps and dropouts, and to transfer a certain amount of hot melt beads to the strip-shaped continuous package accurately and evenly to prevent the occurrence of defective products. It is extremely beneficial in the production of continuous packages.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side view showing a main part of a coating device of the present invention, FIG. 2 is a perspective view showing a main part of a coating part, and FIG. The whole side view of the coating apparatus, FIG. 4 is a perspective view showing a part of a continuous package containing a large number of rod-shaped objects (straws) coated with an adhesive, and FIG. 5 is a continuous view of FIG. FIG. 6 is a perspective view showing a single package obtained by dividing the package, and FIG. 6 is the use (sticking) of the package of a stick (straw).
It is a perspective view showing an example of a state. (1) …… Coating roller, (1a) …… Bead-shaped recess of coating roller, (3) …… Auxiliary roller, (3a) …… Concave groove of auxiliary roller, (5), (5a) …… Drive roller , (6), (6a) …… holding belt, (8), (9) …… arm, (8a) …… pin, (14) ……
Arm shaft, (15) …… Air cylinder, (A) …… Container, (B)
…… Stick, (C ₁ ), (C ₂ ) …… Film, (D)
…… Continuous package, (E) …… Single package.

Claims (3)

[Claims] 1. Two strip-shaped synthetic resin films (C ₁ ),
(C ₂ ) a large number of straws and other rod-shaped objects (B) are arranged in parallel at regular intervals, and the straws and other rod-shaped objects (B) are housed in a sealed state. C ₁ ),
Transfer of the hot-melt adhesive to a continuous strip-shaped package (D) with (C ₂ ) attached, one surface (C ₁ ) being uneven and the other surface (C ₂ ) being flat Continuous package transferred by means
The application roller (1) of the hot-melt adhesive is disposed so as to face the transfer path on the flat surface (C ₂ ) side of (D), and the application roller (1) is applied to the continuous package (D). Rotate at the same peripheral speed as the transfer speed,
The continuous package above the coating roller (1)
An auxiliary roller (3) is arranged at a position facing the coating roller (1) on the side of the uneven surface (C ₂ ) of (D), and the continuous package is provided on the outer periphery of the auxiliary roller (3). A concave groove (3a) having the same spacing as the spacing of the protrusions of (D), into which the protrusions can be freely inserted and withdrawn, is provided, and further, the auxiliary roller (3) is the continuous package ( A device for applying a hot-melt adhesive to a continuous strip-shaped package, characterized in that D) is pressed so as to be in close contact with the surface of the applying roller (1). 2. A strip-shaped synthetic resin film (C ₁ ),
(C ₂ ) a large number of straws and other rod-shaped objects (B) are arranged in parallel at regular intervals, and the straws and other rod-shaped objects (B) are housed in a sealed state. C ₁ ),
Transfer of the hot-melt adhesive to a continuous strip-shaped package (D) with (C ₂ ) attached, one surface (C ₁ ) being uneven and the other surface (C ₂ ) being flat Continuous package transferred by means
The application roller (1) of the hot-melt adhesive is disposed so as to face the transfer path on the flat surface (C ₂ ) side of (D), and the application roller (1) is applied to the continuous package (D). Rotate at the same peripheral speed as the transfer speed,
The continuous package above the coating roller (1)
An auxiliary roller (3) is arranged at a position facing the application roller (1) on the side of the uneven surface (C ₂ ) of (D), while the transfer means is provided with the continuous package (D). A drive roller (5) is arranged on the delivery side, and a holding belt (6) is arranged at a position facing the drive roller (5), and the holding belt (6) is the continuous package.
An apparatus for applying a hot-melt adhesive to a strip-shaped continuous package, characterized in that (D) is held and transferred together with the roller (5). 3. A drive roller (5a) arranged so that the transfer speed of the drive roller (5) is arranged on the feeding side of the continuous package (D).
3. A device for applying a hot-melt adhesive to a continuous strip-shaped package according to claim 2, characterized in that the transfer speed is slightly higher than the transfer speed.