JPH1142753A - Apparatus for adhering lap material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate adherence of an adhesive coated on a lap material to a roll by providing a diameter-enlarging contact means for bringing into contact with an inside region from a side edge of the material without contact with the side edge of the lap material at the roll. SOLUTION: The lap material L coated with hot-melt H is sequentially wrapped on a turning roll 39 while a surface coated with no hot-melt H of the material is brought into contact with an outer periphery of a collar 60, and supplied to a work. The collar 60 is mounted at the roll 39. The material L is brought into contact with the collar 60. And, side edges of the material L are slightly projected from both ends of the collar 60, and separated from an outer periphery of the roll 39. Accordingly, even if the hot-melt H is extended from a side edge of the material L, the extended hot-melt H is not adhered to the roll 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for attaching a wrap material to a work.

[0002]

2. Description of the Related Art As an apparatus for sticking a lap material to a conveyed work, the lap material is continuously supplied along the work, and an adhesive is applied to the wrap material during the supply. There is a type in which a wrapping material is pressed with a sticking roll to be stuck to the surface of a work by the adhesive force of an adhesive. A non-solvent type hot melt is used as the adhesive, and the adhesive applied to the wrapping material is adhered to the work without drying. The solvent-based adhesive is dried once after application and then heated to make it bondable. However, since the hot-melt adhesive is heated at the time of application, a separate drying device and heating device are required. There is an advantage that it is not necessary to provide a device, and it is possible to reduce the size and simplification of the device. Also, in the supply path of the wrapping material, from the position where the adhesive is applied to the position where the adhesive is applied to the work, the supply direction of the wrapping material is changed from a state suitable for applying the adhesive to the work. A roll is provided for the purpose of, for example, turning to a suitable state, and the wrapping material is wound around the roll while the surface opposite to the adhesive-coated surface is in contact with the roll.

[0003]

In the case where the adhesive applied as described above is adhered to a work without drying, a part of the adhesive applied to the wrapping material may be removed from a side edge of the wrapping material. It may protrude and adhere to the outer peripheral surface of the roll. On the other hand, when the wrapping material is wound around a roll and supplied continuously, it is difficult to completely prevent the wrapping material from floating in the width direction. Therefore, the adhesive attached to the roll
The edge of the opposite side of the wrapping material may be in contact with the bonding surface. In this case, the supply of the wrapping material may become unstable due to the adhesive action of the adhesive, or the wrapping material may be broken.

In addition to the above problems, the supply direction of the wrapping material may be vertical in the adhesive application position due to restrictions on the layout of the adhesive application device. In this method, the adhesive is vigorously discharged from the nozzle and applied to the wrapping material. However, in such an application form, when the degree of tension of the wrap material is low, the wrap material is flexed and displaced so as to escape from the nozzle due to the discharge pressure. As a result, the applied amount of the adhesive becomes smaller than the regular amount. Or the amount of application may vary. The invention of the present application has been made in view of the above circumstances, and the invention of claim 1 aims at preventing the adhesive applied to the wrapping material from adhering to the roll, and the invention of claim 2 proposes an adhesive for the wrapping material. The purpose is to stabilize the coating amount of.

[0005]

According to a first aspect of the present invention, there is provided a wrapping material supply means for supplying a wrapping material along a workpiece, an adhesive applying means for applying an adhesive to the supplied wrapping material, A sticking means for pressing a material onto the work and sticking it by an adhesive force of the adhesive, and a lapping material provided between the application position by the adhesive applying means and the pressing position by the sticking means; A roll that is hung while contacting the surface on which the agent is not applied, wherein the roll is in non-contact with a side edge of the wrapping material and is capable of contacting an area inside the side edge. In this configuration, the diameter increasing contact means is provided.

According to a second aspect of the present invention, there is provided a wrapping material supplying means for supplying a wrapping material along a work while being wound around a plurality of rolls, and an adhesive applying means for applying an adhesive to the supplied wrapping material. A sticking means for pressing a wrapping material against a work and applying the adhesive by the adhesive force of the adhesive, wherein the adhesive applying means discharges an adhesive toward the wrapping material; Backup means for restricting displacement of the material in a direction away from the nozzle.

[0007]

Actions and effects of the present invention

<Invention of Claim 1> The wrapping material is wrapped around a roll in a state where the inner region excluding the side edge thereof is in contact with the diameter-expanding contact means, and the side edge of the wrapping material protrudes from the diameter-expanding contact means and is rolled. A gap is provided between the outer circumference of the lens. Therefore, even if the adhesive applied to the wrapping material protrudes from the side edge and the lapping material moves in the width direction, there is no possibility that the protruding adhesive adheres to the outer periphery of the roll. That is,
It is possible to prevent the supply failure and tear of the wrapping material due to the adhesive force of the adhesive adhered to the roll.

When the adhesive is discharged from the nozzle and applied to the lap material, the discharge pressure acts on the wrap material, but the displacement of the wrap material in the direction of escaping from the nozzle is regulated by the backup means. As a result, the position of the wrapping material is stabilized, and the adhesive is uniformly applied at an appropriate application amount.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 Embodiment 1 of the present invention will be described below with reference to FIGS. The apparatus according to the present embodiment includes a work transporting unit 10, a wrapping material supplying unit 30, and a sticking unit 45.
And the wrapping material L is supplied along the work W, and the wrapping material L is adhered while being bent along the surface of the work W by the attaching means 45. Hereinafter, an outline of these means will be described.

[0010] The work transport means 10 includes the carry-in conveyor 1
1 and a conveyor 12 for a sticking area, the conveyor 11 for carrying in is located on the upstream side in the feeding direction (the right side in FIG. 1), and the conveyor 12 for a sticking area is located on the downstream side in the feeding direction. . The carry-in conveyor 11 will be described. A pair of turning sprockets 14 and 15 are disposed at an upstream end position on the upper surface of the base 13 and a position downstream thereof, and a motor 1 is disposed below the upstream turning sprocket 14.
6 is connected to a driving sprocket 17, and a tension sprocket 18 is provided downstream of the driving sprocket 17.
And a turning sprocket 19 are arranged. Chain 20
Is the driving sprocket 17 and the turning sprocket 1 on the upper surface
4 and 15, which are sequentially wrapped around the lower turning sprocket 19 and the tension sprocket 18 and return to the driving sprocket 17 to circulate. Then, the material roll 21 is rotated simultaneously by the circulating chain 20, and the workpiece W placed thereon is conveyed from right to left in FIG. In addition, the point that the conveyor 12 for a sticking area | region has a long conveyance area | region with the large number of material rolls 21,
Except that two tension sprockets 18 are provided, the structure is the same as that of the carry-in conveyor 11 described above.
Description is omitted.

Next, the wrapping material supply means 30 will be described. Conveyor 1 for sticking area in work transfer means 10
Above the base 2, a frame 32 is supported by a main support 31 rising from the back side of the base 13 (upper side in FIG. 3). The reel holder 33 provided on the frame 32 includes:
A pair of reels 34 around which the wrapping material L is wound in a roll shape are rotatably supported. The wrapping material L is fed out from one of the pair of reels 34, and is supplied to a position where the wrapping material L is attached to the work W by an attaching means 45 described later. Then, when the wrapping material L is adhered to the work W, the attached portion moves together with the work W, thereby generating a tensile force on the wrapping material L. From the reel 34. Note that while the wrapping material L is being fed from one of the reels 34, the other reel 34 is replaced with a new one. A pair of steering rolls 35 having a well-known structure is provided on the side of the both reels 34 (the right side in FIG. 1), and here, the bias in the width direction of the wrapping material L fed from the reels 34 is corrected. You. That is, when a well-known photoelectric sensor 36 called a photo head having a light emitting element and a light receiving element detects the displacement direction and the displacement distance of the side edge of the wrapping material L, based on the detection signal, the two steering rolls 35 Is tilted and displaced so as to correct the displacement of the wrapping material L, thereby restricting the play of the wrapping material L in the width direction.

An adhesive applying means 37 for applying a solvent-free hot melt H to the wrapping material L is provided on the main column 31 on the right side of FIG. The adhesive applying means 37 is provided with a nozzle 4 arranged so as to cross over the wrapping material L supplied horizontally by the two turning rolls 38 and 39.
0, an electromagnetic valve 41 for controlling the discharge of the hot melt H from the nozzle 40, and an applicator (not shown) configured to melt the hot melt H by heating and to feed it to the nozzle 40 by pressure. is there. A number of discharge ports (not shown) are opened side by side on the lower surface of the nozzle 40, from which the hot melt H flows down in a drip-like (curtain) shape.
It is applied on the upper surface of the wrapping material L. The wrapping material L to which the hot melt H has been applied is turned downward, is further turned obliquely by the turning rolls 42, and is supplied so as to correspond to the upper surface of the work W.

Next, the attaching means 45 will be described. Both the near side (the left side in FIG. 2) and the back side of the work transporting means 10 on the base 13 are arc-shaped whose positions are adjusted in the left-right direction (the work width direction) and the up-down direction by the driving means 46, respectively. Roll holder 47 is provided. A plurality of sticking rolls 48 are attached to the roll holder 47 at predetermined intervals in the work transfer direction. As shown in FIG. 5, these sticking rolls 48 have different postures and orientations so that the facing angles to the workpiece W are sequentially different, and the outer peripheral surfaces of these sticking rolls 48 are in the material feeding direction. At the corner of the upper surface and the side surface of the work W. Further, as shown in FIG. 6, each sticking roll 48 can adjust the facing angle and the height of the work W by a guide mechanism using a guide groove 49, a bolt 50 and a slider 51. Further, the compression coil spring 5
2, the push-up from the work W to the attaching roll 48 is reduced. Work transfer means 1
Above 0, a plurality of suspending means 53 are provided by the main support 31. The suspending means 53 supports a sticking roll 54 capable of pressing the work W from above. With these sticking rolls 48, 54, the wrapping material L is
Is adhered to the surface of the work W while being bent in accordance with the shape of.

Further, a cutter (not shown) for cutting the wrapping material L is provided at a downstream end position of the bonding area conveyor 12. Further, a sensor (not shown) for detecting the front end and the rear end of the work W is provided on the adhesion area conveyor 12 and the motor 1
An encoder (not shown) that outputs a pulse signal corresponding to the number of rotations of the motor 6 is provided. While the wrapping material L is adhered, the preceding work W and the succeeding work W are connected by the wrapping material L, but each time the wrapping material L is adhered to the preceding work W. Then, the cutter cuts the wrapping material L based on the signals from the sensor and the encoder, and the preceding work W and the following work W are separated.

In the apparatus of the present embodiment, a period from when the hot melt H is applied to when the hot melt H is adhered to the workpiece W is set.
The wrapping material L is wound around two deflecting rolls (rolls, which are constituent elements of the first aspect of the present invention).
Means have been taken to prevent the hot melt H applied to the substrate from being attached. That is, the turning roller 39 wound around immediately after the application of the hot melt H is provided with a cylindrical fixing means (expansion contact means, which is a constituent feature of the first aspect of the present invention) such as a screwing means. Installed by. The outer diameter of this collar 60 is the turning roll 3
9, the axial dimension of the collar 60 is slightly shorter than the width of the wrapping material L. The surface of the wrapping material L on which the hot melt H is not applied comes into contact with the collar 60. Although not shown, a collar 60 similar to the above is attached to the other deflection roll 42.

Next, the operation of the present embodiment will be described. The wrapping material L to which the hot melt H is applied is sequentially wound around the two turning rolls 39 and 42 while the surface on which the hot melt H is not applied is in contact with the outer periphery of the collar 60, and is supplied to the work W. Is done. During this time, the hot melt H is not dried and remains in an adhesive state. Therefore, if the hot melt H comes into contact with the deflecting rolls 39 and 42, the hot melt H will adhere to the outer peripheral surfaces of the deflecting rolls 39 and 42. . However, in the present embodiment, the collar 60 is attached to the diverting rolls 39 and 42, and the wrapping material L is brought into contact with the collar 60. Further, as shown in FIG. The roller is slightly projected from both ends and is separated from the outer circumference of the deflection rolls 39 and 42. Therefore, even if the hot melt H protrudes from the side edge of the wrapping material L, the protruded hot melt H does not adhere to the deflection rolls 39 and 42.

Incidentally, since the play of the wrapping material L in the width direction is suppressed by the pair of steering rolls 35 as described above, the wrapping material L is not largely displaced in the width direction. Further, since the dimensional difference between the length of the collar 60 and the width of the wrapping material L is set in consideration of the amount of play of the wrapping material L, even if the wrapping material L slightly moves in the width direction,
Since the side edge of the wrapping material L is inside the edge of the collar 60, there is no displacement, so there is no risk that the hot melt H adheres to the collar 60.

As described above, in the present embodiment, the collar 60 is provided on the turning rolls 39 and 42 so that the side edge of the wrapping material L does not contact the outer periphery of the turning rolls 39 and 42. The hot melt H is prevented from adhering to the deflecting rolls 39 and 42 due to the play in the width direction, and thus the supply failure of the wrapping material L due to the adhesive force of the hot melt H adhering to the deflecting rolls 39 and 42. And tearing can be prevented.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. While the first embodiment is a dedicated device using only solventless hot melt H as an adhesive, the second embodiment
Is a dual-purpose device that can use both a hot melt (not shown) and a solvent-based adhesive (not shown). The configuration other than the adhesive application unit is the same as that of the first embodiment, and thus the same configuration is denoted by the same reference numeral, and the description of the structure, operation, and effect is omitted.

First, the wrapping material supplying means 30 and the adhesive applying means 100 for applying the solvent-based adhesive will be described. An arm 31A is fixed to the main column 31 on the rear side (left side in FIG. 9) standing upright on the base 13.
A is provided with a pair of reels 34. An adhesive application unit 100 for applying a solvent-based adhesive is provided at an upper end of the rear main column 31. The adhesive application unit 100 includes a tank 101 for storing the adhesive, and a slit-shaped nozzle (not shown) that opens downward and discharges the adhesive. Both main columns 31
A long and thin drying tunnel 102 is provided therebetween, and a workpiece (not shown in the second embodiment) passes through the drying tunnel 102 after being coated with a solvent-based adhesive. Is dried. The wrapping material L that has passed through the drying tunnel 102 is
The sheet is turned downward by 3 and sent downward along the main column 31 on the front side, and further turned obliquely rearward and downward by the turning roll 104 to be supplied so as to correspond to the upper surface of the work. The main column 31 has a heater 105 for rapidly heating the solvent-based adhesive to facilitate adhesion to the work.
Is provided. That is, the solvent-based adhesive is a wrap material L
Once it is applied, it is dried at a low temperature once, and then heated just before it is adhered to the work to make it adhereable.

Below the heater 105, an adhesive applying means 150 for applying a hot melt is provided. The adhesive applying means 150 includes a nozzle 151 for discharging hot melt corresponding to the wrap material L, a discharge unit 153 having an electromagnetic valve 152 for controlling the discharge of hot melt from the nozzle 151, and a hot melt. This is a known device including an applicator (not shown) that melts by heating and pressure feeds the nozzle 151. The nozzle 151 has a large number of discharge ports (not shown) provided with a wrap material L.
The hot melt is discharged at a high pressure in a horizontal direction from here, and is applied to the wrapping material L.

The discharge unit 153 is fixed to a slider 155 via arms 154 fixed to both ends of the discharge unit 153.
The female screw body 158 fixed to the slider 155 is movably fitted in the dovetail groove 57 and further fixed to the slider 155.
It is screwed to a male screw shaft 159 that is inserted between them. Therefore, when the male screw shaft 159 is rotated by operating the handle 160, the discharge unit 153 moves in the width direction of the wrapping material L.

On the other hand, a pair of upper and lower backup rolls (backup means, which is a constituent feature of the second aspect of the present invention) is located at a position opposite to the nozzle 151 across the wrapping material L.
1, 162 are provided. Both ends of the backup rolls 161 and 162 are supported by bearing members 163.
64 guides the nozzle 151 toward and away from the nozzle 151.
Are connected. That is, when the air cylinder 165 is operated, the backup rolls 161, 1
62 is a retracted position separated from the wrapping material L as shown in FIG.
It is driven between an advanced position where it is pressed to one side and brought into a substantially contact state. When displaced to the advanced position, the two backup rolls 161 and 162 are located above and below the nozzle 151 and are close to the nozzle 151.

Also, the two backup rolls 16
In the same manner as in the first embodiment, the lower backup roll 162, that is, the backup roll 162 to which the wrapping material L corresponds immediately after the application of the hot melt (the roll which is a constituent element of the first aspect of the present invention). A collar (large diameter contact means, which is a constituent feature of the first aspect of the present invention) 60 is attached to prevent the hot melt applied to the wrapping material L from adhering. Similarly, the turning roll 104 below the backup roll 162, that is, the turning roll (roll which is a constituent element of the first aspect of the present invention), is wound around immediately before the wrapping material L is attached to the work. A collar 60 is attached. Since the configuration of these collars 60 is the same as that of the first embodiment, the description is omitted.

Next, the operation of the present embodiment will be described. When hot melt is applied to the wrapping material L, the backup rolls 161 and 162 are moved to the advanced position, the wrapping material L is pressed to bend the supply path, and the wrapping material L is almost moved to the discharge port of the nozzle 151. Make sure they adhere. Further, the position of the nozzle 151 in the width direction is also adjusted according to the position of the wrapping material L. Then, in this state, the hot melt heated and melted from the applicator is dispensed with the nozzle 151.
The hot melt discharged at high pressure from the nozzle 151 is applied to the wrapping material. At this time, the nozzle 15
The wrapping material L tries to escape from the nozzle 151 by the discharge pressure from the nozzle 1, but since the displacement in the escape direction is regulated by the backup rolls 161 and 162, the position of the wrapping material L is stabilized and the hot melt Is uniformly applied with an appropriate application amount.

The discharge pressure from the nozzle 151 is not directly received by the backup rolls 161 and 162, but acts on the wrapping material L at an intermediate position between the backup rolls 161 and 162. Are set to be narrow, so that the amount of displacement of the wrapping material L in the escape direction falls within an allowable range. The wrapping material L coated with the hot melt is supplied to the work by being wrapped around the lower backup roll 162 and the turning roll 104 therebelow, and supplied to the work. Since the collar 60 is attached, the hot melt applied to the wrapping material L is prevented from adhering to the backup roll 162 and the turning roll 104 as described in the first embodiment. Also,
When a solvent-based adhesive is applied to the wrapping material L instead of the hot melt, as shown in FIG. 11, the backup rolls 161 and 162 move to the retreat positions and separate from the wrapping material L, and the wrapping material L By being tensioned between the deflecting rolls 103 and 104, it is also separated from the nozzle 151.
When the solvent-based adhesive is applied in this state, the surface on which the solvent-based adhesive is applied does not rub against the nozzle 151, so that the surface on which the solvent-based adhesive is applied is kept in a good applied state.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention. (1) In the first and second embodiments, the collar 60 serving as the diameter-increasing contact means is capable of being attached and detached and moved in the axial direction. It may be. In this case, the diameter increasing contact means may be a separate component from the roll, or may be formed integrally with the roll.

(2) In the first embodiment, the hot melt H
Is applied to the wrapping material L in the form of a curtain from above, but also in the first embodiment, the structure in which the adhesive is discharged from the side by a nozzle using a backup roll as in the second embodiment is used. It is possible to apply. (3) In the second embodiment, the backup roll 161,
Although the nozzle 162 is moved in the direction of contact and separation with respect to the nozzle 151, the nozzle may be moved, or both the nozzle and the backup roll may be moved.

(4) In the second embodiment, the collar 60 is mounted on the lower backup roll 162. However, according to the second aspect of the present invention, the collar may not be provided. (5) In the second embodiment, the hot melt is discharged laterally to the wrapping material L. According to the invention of claim 2, the adhesive is discharged upward or downward and the wrapping material is backed up by the backup roll. It is possible to adopt a configuration in which displacement in the escape direction is restricted.

(6) In the second embodiment, rotatable backup rolls 161 and 162 are used as backup means.
However, according to the second aspect of the present invention, a flat or arcuate surface may be fixedly provided, and the lap material may be slid in contact therewith.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment.

FIG. 2 is a front view of the first embodiment.

FIG. 3 is a plan view showing a wrapping material supply unit according to the first embodiment.

FIG. 4 is a front view illustrating a wrapping material supply unit according to the first embodiment.

FIG. 5 is a front view showing the positional relationship between the work and the sticking roll according to the first embodiment.

FIG. 6 is a sectional view showing details of the structure of the sticking roll of the first embodiment.

FIG. 7 is an enlarged side view illustrating an adhesive application unit according to the first embodiment.

FIG. 8 is a partially cutaway enlarged front view showing a diameter expanding contact unit of the first embodiment.

FIG. 9 is a side view of the second embodiment.

FIG. 10 is a partially cut-away enlarged side view showing a state in which hot melt is applied in the second embodiment.

FIG. 11 is a partially cut-away enlarged side view showing a state in which a solvent-based adhesive is applied in the second embodiment.

FIG. 12 is a partially cutaway perspective view showing a hot-melt adhesive applying unit according to the second embodiment.

[Explanation of symbols]

W: Work L: Wrap material 30: Wrap material supply means 37: Adhesive applying means 45: Sticking means 39: Turning roll (roll) 42: Turning roll (roll) 60: Collar (expanding contact means) 100: Adhesion Agent application means 104 ... turning roll (roll) 150 ... adhesive application means 151 ... nozzle 161 ... backup roll (backup means) 162 ... backup roll (backup means, roll)

Claims (2)

[Claims] 1. A wrapping material supplying means for supplying a wrapping material along a work, an adhesive applying means for applying an adhesive to the supplied wrapping material, and pressing the lapping material against the work to apply an adhesive. A sticking means for sticking by adhesive force, provided between an application position by the adhesive applying means and a pressing position by the sticking means, and wrapping the wrapping material while contacting the surface on which the adhesive is not applied. Wherein the roll is provided with a diameter increasing contact means which is not in contact with the side edge of the wrapping material and enables contact in an area inside the side edge. Characteristic wrapping material sticking device. 2. A wrapping material supply means for supplying a wrapping material along a work while being wound around a plurality of rolls, an adhesive applying means for applying an adhesive to the supplied wrapping material, An adhesive means for applying an adhesive to the wrap material, and a bonding means for applying an adhesive toward the wrap material. A wrapping material adhering device, comprising: backup means for restricting displacement in the escape direction.