JP2002143741A - Wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel capable of keeping the liquid level of an adhesive storage tank constant at all times and ensuring an steady liquid level. SOLUTION: A wheel 20 has a roll 2, which is mounted rotatably in the adhesive storage tank 21 of a main body 20a and which sticks an adhesive 15 on its peripheral surface to transfer the adhesive to another roller or the like. A weir 22 which can adjust the liquid level of the adhesive 15 is installed in the storage tank 21. The weir 22 is equipped with a shuttering 24 for adjusting the liquid level of the adhesive so that the plate can move vertically. The storage tank 21 has an adhesive return tank 30 which receives the adhesive overflowing the storage tank 21 through the weir 22 and is separated by the weir 22 from the storage tank 21, and these tanks are formed integrally with the wheel main body 20a. The return tank 30 is attached with a level sensor 31 for detecting the storage amount of the adhesive in the return tank and an adhesive outlet 30a. Adhesive return pipe lines 35a, 35d, 35e, 37 for returning the adhesive to an adhesive melt feeder 12 when the level increase of the adhesive in the return tank 30 is detected by the level sensor are connected and installed between the adhesive outlet and the adhesive melt feeder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll which is partially immersed and rotated inside an adhesive storage tank in which a liquid adhesive such as a hot melt adhesive is stored. The present invention relates to a wheel such as a roll coater for transferring (transferring) the adhesive adhered to a surface to another roll that rotates in contact with the roll. Specifically, the liquid level of the adhesive reservoir tank of the wheel is constantly controlled. It concerns a wheel that can be kept constant.

[0002]

2. Description of the Related Art The structure of a conventional roll coater, that is, a wheel as a roll transfer coating apparatus will be described with reference to FIGS. In both figures, the wheel 1 has an adhesive reservoir 3 formed inside the wheel body 1a,
The lower portion is immersed in a hot melt adhesive (hereinafter, simply referred to as an adhesive) 15 stored in the storage tank 3 at a predetermined liquid level in the storage tank 3, and both ends are supported by bearings 2a. A roll 2 that is rotationally driven in the direction of the arrow shown in the figure by a rotational drive source not shown is attached.
The roll 2 is provided with a concave portion such as a dent or a groove (not shown) in an appropriate pattern on the peripheral surface. The peripheral surface of the roll 2 is pooled and immersed in the adhesive of the tank 3 so that the adhesive is It is taken in.

Reference numeral 6 denotes a scraper for scraping off excess adhesive adhered to the peripheral surface of the roll 2, and reference numeral 7 denotes a scraper formed on the peripheral surface of the roll 2 when the roll 2 rotates into the adhesive reservoir. An inner scraper for scraping air or the like that has entered the concave portion and facilitating incorporation of the adhesive into the concave portion. An adhesive supply port 1b is formed in a side wall of the wheel main body 1a, and the adhesive supply port 1b communicates with an adhesive supply passage 8a of a manifold 8 attached to and attached to the side wall surface. An adhesive valve 9 is attached to the manifold 8 such that a discharge port thereof is connected to an adhesive supply passage 8 a of the manifold 8.

[0004] Further, another adhesive supply passage 8b is formed inside the manifold 8, one end of which is communicated with an inlet of the adhesive valve 9, and the other end thereof is a hose fitting attached to the manifold 8. 13a.
A drive air piping tube 11 for driving the valve 9 is connected to and attached to the adhesive valve 9, and a solenoid valve (electromagnetic valve) 10 is interposed in the piping tube 11. An adhesive supply hose 13 is attached to the hose fitting 13 a of the manifold 8 between the hose 8 and an adhesive melting supply device (applicator) 12.

A temperature sensor 16 is inserted into the bottom wall of the main body 1a, that is, a temperature sensor for detecting the temperature of the adhesive 15 in the storage tank 3, and a temperature sensor 17 is inserted into the bottom wall of the main body 1a. That is, a heater 18 for heating the adhesive 15 in the storage tank 3 is installed below the roll 2 in the storage tank 3, and is provided on the rotation direction side of the lower part of the roll 2 immersed in the liquid. A hydraulic pressure adjusting block having an inclined upper surface whose height (level) gradually increases;
This prevents the liquid surface from being lifted by the rotation of the roll 2 toward the rotation direction side of the immersion portion of the roll, thereby preventing the liquid pressure from rising abnormally.

At a portion along the one side wall and the bottom wall of the main body 1a of the tank 3 of the block 18, the liquid is returned from the downstream side in the rotation direction of the immersion portion of the roll to the counter-rotation side in order to escape the rise in the liquid pressure. Liquid recirculation groove (shown by a broken line) is provided. Reference numeral 19 denotes a lid for the storage tank 3, which has an opening for exposing a part of the upper portion of the roll 2 to the outside.

However, the inside of the adhesive reservoir 3 is
The level sensor 4 for operating the adhesive valve 9 facing the liquid level of the adhesive 15 stored therein is shifted from the level sensor 4 in the width direction of the main body 1a above the level sensor 4 (FIG. 9). See) Level sensor 5 for overflow detection
Is attached to the main body 1a via a bracket so that the position in the vertical direction can be adjusted. The level sensors 4 and 5 are high-frequency sensors in this example of the apparatus, and the liquid level is detected by changing the capacitance depending on the vertical position of the sensor body. As an alternative level sensor, an ultrasonic type or a float type is also employed.

In the wheel 1 thus configured, the adhesive 15 in the storage tank 3 is applied to the roll 2 while the wheel 1 is operating.
Is transferred to another roller or the like, the amount of pool is reduced. Therefore, it is necessary to constantly supply the adhesive 15 to the pool tank 3. In this case, the amount of adhesive ( It is necessary to keep the liquid level of the adhesive 15 in the adhesive reservoir 3 always constant for the purpose of, for example, making the applied amount constant. Therefore, during operation, the liquid level of the adhesive 15 in the adhesive reservoir 3 is controlled by the adhesive valve actuation level sensor 4.

That is, when the level sensor 4 detects the level of the liquid level, the solenoid valve 1
The adhesive valve 9 is opened and closed by the supply and stop of the drive air 10a by excitation and non-excitation of 0, and the supply and stop of the adhesive from the adhesive melt supply device 12 into the accumulation tank 3 are performed. Thus, the liquid level of the adhesive in the storage tank 3 is maintained constant. on the other hand,
When the level of the adhesive in the storage tank 3 rises abnormally for some reason during the operation by the level sensor 5,
It is configured to detect this and close the adhesive valve 9. Thus, the liquid level is controlled by the two level sensors 4 and 5.

[0010]

However, the method of controlling the liquid level by directly attaching the level sensors 4 and 5 to the inside of the adhesive reservoir 3 so as to face the liquid surface is as follows.
There were the following problems. That is, as the wheel 1 is operated, the vapor (adhesive) of the adhesive or the adhesive itself adheres to the level sensor, and the adhered substance is deteriorated and carbonized. As the frequency (capacitance) changes, the liquid level detection value of the level sensor itself changes, and as a result, the liquid level of the adhesive changes with time. Also, since there is not much difference in the detection level of the level sensor itself,
There is a problem that it is difficult to adjust the level sensor severely.

Further, there is a problem in that the level sensor easily malfunctions because the adhesive liquid level undulates while the wheel 1 is operating. As described above, there is a problem in the reproducibility of the liquid level of the level sensor, and since the state of the liquid level changes during the operation of the wheel 1, it is necessary to readjust the level sensor, and the adjustment of the level sensor is complicated. Yes, the maintenance was very cumbersome. As described above, it is important for the wheel 1 to maintain a stable liquid level in the adhesive reservoir 3. To prevent the liquid level from shaking,
Even if the level sensor is surrounded by a plate or the level sensor itself is changed to another type such as an ultrasonic type or a float type, it is very difficult to control the level within ± several mm from the set liquid level. Was difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a height-adjustable weir provided in an adhesive reservoir, and a liquid on a liquid surface is caused to overflow the weir. It is another object of the present invention to provide a wheel capable of maintaining a stable liquid level without requiring a severe level detection adjustment as in a conventional level sensor.

[0013]

In order to achieve the above object, the wheel of the present invention has the following structure. (1) A wheel rotatably provided with a roll for adhering an adhesive to the inside of an adhesive storage tank of the main body and transferring the adhesive to another roller or the like, and bonding to the adhesive storage tank. The construction was such that a weir capable of adjusting the liquid level of the agent was provided.

(2) In the wheel of (1), the weir is provided with a vertically movable weir plate for adjusting the liquid level of the adhesive.

(3) In the wheel according to the above (1) or (2), the adhesive storage tank further includes an adhesive return tank for receiving the adhesive overflowing from the storage tank through the weir. It was provided separately and was configured to be integrally formed with the wheel body.

(4) In the wheel according to (3), a level sensor and an adhesive outlet for detecting the amount of adhesive accumulated in the return tank are attached to the adhesive return tank. An adhesive return line for detecting an increase in the level of the adhesive in the return tank by the level sensor and returning the adhesive to the adhesive melt supply device between the adhesive outlet and the adhesive melt supply device. Are connected to each other.

(5) In the wheel of (3), an adhesive outlet is attached to the adhesive return tank, and the adhesive pool is stored in the adhesive return tank between the adhesive outlet and the adhesive melt supply device. An adhesive return line for returning the adhesive to the adhesive melt supply device by gravity flow was provided.

[0018]

In the configuration (1) described above, the adhesive, which is a hot melt adhesive, is supplied from the adhesive melting supply device to the adhesive reservoir provided with the weir in the wheel body. The adhesive in the adhesive reservoir tank overflows the weir when the liquid level becomes equal to or higher than the set height of the weir, and the outside of the reservoir,
For example, it flows into an adhesive return tank provided in the pool tank and separated by the weir. Since the weir has a simple mechanical structure, as in the case of using a conventional level sensor, the liquid level detection value of the level sensor itself due to the adhesion of the adhesive vapor and the adhesive itself to the level sensor is used. The stable level of the adhesive in the reservoir tank is ensured without being affected by the fluctuation of the pressure sensor or by the malfunction of the level sensor due to disturbance such as waving of the adhesive. Therefore, the amount of the adhesive applied (applied amount) to the roll is stabilized, and the transfer state of the adhesive from the roll to another roll or the like is stabilized.

In the configuration of the above (2), the weir plate is provided so as to be movable up and down, and the weir plate is moved up and down to adjust the liquid level, thereby adjusting the liquid level. The change can be made only by adjusting the height of the weir plate without requiring a severe adjustment. That is, at the time of adjusting the liquid level, there is no need to repeatedly perform the liquid level test unlike the conventional level sensor, and the liquid level can be easily adjusted by visually adjusting the height of the weir plate. Further, at the time of maintenance, only the height of the weir plate needs to be confirmed, and there is no need for readjustment as compared with the level detection by the conventional level sensor.

In the above configuration (3), the tank for receiving the liquid (adhesive) overflowing from the weir is constituted by separating the adhesive reservoir by the weir, that is, the adhesive reservoir in the wheel body. And the adhesive return tank is formed integrally by partitioning it with a weir to form a so-called two-tank structure, so that a separate return tank for receiving the liquid overflowing from the weir outside or near the adhesive storage tank of the wheel body. The wheels are more compact and simpler than those provided side by side.

In the configuration of the above (4), when the adhesive flowing from the adhesive collecting tank over the weir into the adhesive returning tank reaches a predetermined height level, it is detected by the level sensor, and When the circulation pump for the adhesive is activated, for example, by the detection signal of the above, the adhesive is returned to the adhesive melting supply device through the adhesive outlet and the adhesive return pipe provided in the return tank. As a result, the returned adhesive is again supplied from the adhesive melting supply device to the adhesive storage tank of the wheel main body, so that the adhesive is recycled. Thus, no adhesive is wasted.

In the above configuration (5), the adhesive that has flowed into the adhesive return tank over the weir from the adhesive storage tank falls naturally through the adhesive discharge port and the adhesive return pipe provided in the return tank. (Gravity fall) returns to the adhesive melting supply device. Therefore, it is not necessary to install a level sensor for detecting the liquid level of the adhesive accumulated in the adhesive return tank as described above and discharging the adhesive from the return tank. It is not necessary to provide a circulation pump for forcibly returning the accumulated adhesive, for example, as described above, and the wheel is formed to be compact overall.

[0023]

Next, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a hot-melt adhesive is used as the adhesive, but the present invention is not limited to this, and any adhesive may be used as long as it is a liquid adhesive.

1 to 7 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view (partial front view) of a wheel, FIG. 2 is a right side view of FIG. 1, and FIGS. 6 is a view showing an embodiment of the weir, FIG. 3 is a front view of the weir, FIG. 4 is a plan view of FIG. 3, FIG. 5 is a cross-sectional view taken along line A-A of FIG. FIG. 6 is a sectional view taken along the line AA of FIG. 3, showing a state in which the weir plate is placed at a higher level, and FIG. 7 is another embodiment of the wheel. It is a longitudinal cross-sectional view (partial front view) which shows. In these drawings, the same or corresponding portions as those in FIGS. 8 and 9 are denoted by the same reference numerals, and description thereof will be omitted.

1 and 2, reference numeral 20 denotes a wheel, 2
0a is a wheel body, 20c is a wheel leg (mounting seat),
Reference numeral 20d denotes a bolt screw hole for joining the main body. Main body 20a
, An adhesive storage tank 21 having a roll 2 rotatably, and an adhesive return tank 30 separated by a weir 22.
Are formed. That is, by using a configuration in which the weir 22 is provided in the conventional adhesive storage tank shown in FIGS. 8 and 9, a two-tank structure of the adhesive storage tank 21 and the adhesive return tank 30 is formed. In the adhesive return tank 30, a level sensor 31 for operating the circulating pump 36 can be adjusted to a vertical position by a bracket 33 so as to face a liquid surface of the return liquid below a position shifted to one side in the width direction of the main body 20a. At the same time, a level sensor 32 for overflow detection is installed above a position shifted to another side of the main body 20a in the width direction by a bracket 34 so that the vertical position can be adjusted.

At the center of the bottom wall 20e of the main body 20a, a manifold 35 is integrally connected to the bottom wall 20e by bolts 35f and mounted. The manifold 35 has a hot melt valve (adhesive valve) 9 A circulation pump 36 is mounted. Adhesive supply port 2 penetrates vertically through bottom wall 20e of main body 20a into reservoir tank 21.
0b is opened and communicates with one end of a first adhesive supply passage 35b formed in the manifold 35. The other end of the first adhesive supply passage 35b communicates with the discharge port of the adhesive valve 9. Also, a second adhesive supply passage 35c is formed in the manifold 35, one end of which is connected to the adhesive inlet of the adhesive valve 9, and the other end of which is connected to the hose fitting 13a. An adhesive supply hose 13 is connected between the hose fitting 13a and the adhesive melt supply device 12.

On the other hand, an adhesive outlet 30a is opened in the adhesive return tank 30 vertically through the bottom wall 20e of the main body 20a, and one end of a first adhesive return passage 35a formed in the manifold 35. Has been communicated with. The other end of the first adhesive return passage 35a communicates with the suction port of the adhesive circulation pump 36. A second adhesive return passage 35d is formed in the manifold 35, one end of which is connected to the adhesive discharge port of the adhesive circulation pump 36, and the other end of which is connected to the inlet of the adhesive filter 35i. ing.
Further, a third adhesive return passage 3 is provided in the manifold 35.
5e, one end of which is provided with the adhesive filter 35i.
The other end is connected to a hose fitting 37a for returning the adhesive. An adhesive return hose 37 is connected between the hose fitting 37a and the adhesive melt supply device 12.

Numeral 38 denotes a temperature sensor which is inserted into the manifold 35 and detects the temperature of the adhesive in the adhesive passage inside the manifold itself, and numeral 39 denotes a temperature sensor which is similarly inserted into the manifold 35 and which is the manifold itself, ie,
It is a heater for heating the adhesive in the adhesive passage inside. 35g is a drain valve for the adhesive filter 35i, and 35h is a drain for the adhesive reservoir tank. Reference numeral 6 denotes a scraper for scraping off excess adhesive adhered to the peripheral surface of the roll 2, and reference numeral 7 denotes a concave portion formed on the peripheral surface of the roll 2 when the roll 2 rotates into the adhesive reservoir. An inner scraper 18 for scraping out the air or the like that has entered the inside and facilitating the incorporation of the adhesive into the concave portion, a block 18 for adjusting the liquid pressure, and a cover 19 covering the reservoir 21 and the return tank 30.

Here, the configuration of the weir 22 will be described. As shown in FIGS. 3 to 6, the weir 22 has an opening 23 at the upper center.
a, and a mounting bolt 2 extending vertically on both left and right peripheral edges of the opening 23a of the weir body 23.
6a, a slide rail 26 fastened to and attached to the weir main body 23, and a vertically movable (slidable) fit fitted between the guide groove 26b of the slide rail 26 and the weir main body 23. The weir plate 24 and the weir body 23
A height adjusting bolt holding block 27 and a weir height adjusting bolt 28 are located at the upper part of the opening 23a, and are fastened to the upper end surface of the weir main body 23 by mounting bolts 27a.

The weir plate 24 has a height adjusting bolt screwing block 2 in which a female screw for screwing a lower portion of a screw portion of a height adjusting bolt 28 is screwed at the upper center thereof.
5 are integrally connected by mounting bolts 25a. Further, the height adjusting bolt holding block 27 has a slot-shaped bolt head having a front face opened to rotatably accommodate a head of a hexagon socket head bolt serving as a weir height adjusting bolt 28. A holding groove 27b is formed, and
In the lower part thereof, a slot-shaped bolt screw portion receiving groove 27d is formed in which the front surface of the block 27 for receiving the screw portion of the hexagon socket head bolt is opened continuously with the holding groove 27b,
A hexagon wrench insertion hole 27c for inserting a hexagon wrench into the hexagon hole of the head of the hexagon socket head bolt is formed in the upper part of the bolt head holding groove 27b.

In the state of the weir 22 constructed as described above, the weir plate 24 is at the lowest position in the state shown in FIGS. 3 and 5, and the liquid level in the adhesive reservoir 21 is kept at the lowest level. Dripping. From this state, a hexagonal wrench is inserted through the hexagonal wrench insertion hole 27c and inserted into the hexagonal hole at the head of the weir plate height adjusting bolt 28, and the wrench is turned to screw the bolt 28 into the height adjusting bolt screw. When screwed into the joint block 25, the weir plate 24 integrated with the block 25 is guided upward between the guide groove 26b of the slide rail 26 and the weir main body 23 and moved upward. As a result, the liquid level of the adhesive 15 in the storage tank 21 is increased.

FIG. 6 shows a state in which the weir plate 24 is raised above the minimum level. In this state, the liquid level of the adhesive 15 in the adhesive reservoir 21 is maintained at a higher level. The weir plate 24 is attached so that the sliding contact surface between the weir main body 23 and the slide rail 26 is tightly attached, so that the adhesive does not leak from the reservoir 21 to the return tank 30 through the sliding contact surface. Is configured. In addition, the lower end surface of the weir body 23 is joined to the upper surface of the bottom wall 20e of the wheel main body 20a, and the weir 22 is fixedly attached to the bottom wall 20e.

The wheel 20 configured as described above
During the operation (operation), it is necessary to constantly supply the adhesive to transfer (transfer) the adhesive to another roll or the like due to the rotation of the roll 2. A hot melt adhesive melted in a liquid state is supplied to an adhesive reservoir 21 from a pump (not shown) built in the apparatus 12. That is, the adhesive is supplied to the storage tank 21 by energizing the solenoid valve 10 and driving air 10a.
Is supplied to the adhesive valve 9 through the piping tube 11, the valve 9 is opened, and the hot melt adhesive melted in a liquid state is supplied from the adhesive melting supply device 12 through the supply hose 13 to the manifold 35. This is performed through the second adhesive supply passage 35c, the adhesive valve 9, the first adhesive supply passage 35b, and the adhesive supply port 20b of the wheel body 20a.

While the wheel 20 is operating, the adhesive 15 supplied to the pool 21
When the liquid level becomes equal to or higher than the height of the weir plate 24 of the set weir 22, that is, when the liquid level exceeds the upper end surface (overflow surface) 24a of the weir plate 24, the adhesive overflows from the upper end surface 24a and the adhesive It flows into the return tank 30. Thereby, the storage tank 2
The liquid level of the adhesive 15 is always the same as the original weir plate 2
The set height level of 4 is maintained. In this way, the liquid level of the adhesive 15 in the adhesive reservoir 21 is caused to overflow on the overflow surface 24a of the weir plate 24 of the weir 22, so that the liquid level of the adhesive 15 is naturally kept constant. Thus, there is no need for a severe level detection adjustment like the conventional level sensor 4, and a stable liquid level can be maintained.

The adhesive flowing into the return tank 30 accumulates in the return tank 30 and when the liquid level rises to a predetermined level or higher, the circulating pump operating level sensor 31 is activated. Is operated, the adhesive outlet 30a of the return tank 30, the first adhesive return passage 35a of the manifold 35, the circulation pump 36, the second adhesive return passage 35d, the filter 35i, and the third adhesive return passage 35
e, and is returned to the adhesive melting tank of the adhesive melting supply device 12 through the adhesive return hose 37. The returned adhesive is again supplied from the adhesive melting supply device 12 to the storage tank 21 and is circulated. The liquid level of the return tank 30 does not need to be severely adjusted unlike the storage tank 21, and a conventional high-frequency, ultrasonic, or float type level sensor can be used as it is.

During operation, if the amount of the accumulated adhesive in the accumulation tank 21 and the return tank 30 increases due to some abnormality, and the liquid level rises above the set level of the weir 22, the overflow occurs. The level of the liquid is detected by the level sensor 32 for detection, the excitation of the solenoid valve 10 is released based on the signal, the adhesive valve 9 is closed, and the adhesive from the adhesive melting and supplying device 12 to the reservoir 21 is removed. Supply is stopped.

Next, another embodiment of the present invention will be described with reference to FIG. In the present embodiment,
1 and 2 are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 7, compared to the embodiment of FIGS. 1 and 2, only the overflow detection level sensor 32 is attached to the adhesive return tank 30 of the wheel 20 as a level sensor. And
The manifold 40 is connected to the bottom wall 20e of the wheel body 20a.
The bottom wall 20a is joined to the lower surface and is attached by a mounting bolt 40d.
And are integrally fastened.

Inside the manifold 40, there are formed a first adhesive supply passage 40b and a second adhesive supply passage 40c which communicate with the adhesive supply port 20b of the adhesive reservoir 21 of the wheel body 20a. 1 adhesive supply passage 40b
Is connected to the discharge port of the adhesive valve 9 and the second end of the second
One end of the adhesive supply passage 40c is communicated with the inlet of the adhesive valve 9, and the other end is communicated with the hose fitting 13a. Further, inside the manifold 40, an adhesive return passage 40a communicating with the adhesive outlet 30a of the adhesive return tank 30 is formed.

The adhesive 1 flowing into the return tank 30 is connected between the lower end surface of the manifold 40 and the adhesive melt supply device 12 by communicating with the lower opening end of the adhesive return passage 40a.
5 is connected and attached to an adhesive return pipe 41 for flowing the inside of the pipe 5 by gravity (under gravity flow). 3
Reference numeral 9 denotes a manifold 40, that is, first and second adhesive supply passages 40b and 40 formed inside the manifold 40.
c, and a heater 38 for heating the adhesive flowing through the adhesive return passage 40a, and a temperature sensor 38 for detecting the temperature of the manifold 40, that is, the adhesive flowing inside the manifold 40.

In this configuration, the adhesive that has overflowed the weir 22 from the adhesive storage tank 21 and flowed into the adhesive return tank 30 is subjected to the adhesive outlet 30a, the adhesive return passage 40a in the manifold 40, and the adhesive. The adhesive is spontaneously returned to the adhesive melting tank of the adhesive melting supply device 12 through the agent return pipe 41 by gravity. Then, the returned adhesive is supplied with an adhesive supply hose, the first and second supply passages 40c and 40b in the manifold 40, and the adhesive supply port 20 of the main body 20a.
Then, it is supplied to the storage tank 21 through b and is used again.

Thus, when the wheel 20 is configured as described above, the wheel is configured very simply. That is,
Compared with the embodiment shown in FIGS. 1 and 2, a level sensor for detecting and discharging the amount of accumulated adhesive in the adhesive return tank 30 is not required, and the adhesive is supplied to the melt supply device 12. A circulating pump for returning to the original state becomes unnecessary. further,
The number of adhesive passages in the manifold 40 is also small.
Although the adhesive returning pipe 41 is a straight pipe, it is needless to say that the adhesive returning pipe 41 may be a curved pipe, an inclined pipe, or a pipe that combines them.

[0042]

As is apparent from the above description, according to the present invention, the following excellent effects can be obtained.

According to the first aspect of the present invention, since the weir has a simple mechanical structure, the level sensor itself is formed by an adhesive vapor or an adhesive itself attached to the level sensor, as in the case of using a conventional level sensor. The liquid level of the adhesive in the adhesive storage tank is always controlled without being affected by the fluctuation of the liquid level detection value of the liquid, or by the malfunction of the level sensor due to disturbance such as waving of the adhesive. It can be kept constant and a stable liquid level can be secured. Therefore, it is possible to stabilize the adhesion amount (application amount) of the adhesive to the roll and to stabilize the transfer state of the adhesive from the roll to another roll or the like.

According to the second aspect of the present invention, the weir plate is configured so that the weir plate can be moved up and down, and the weir plate is moved up and down to adjust the liquid level, thereby adjusting the liquid level. The change can be made only by adjusting the height of the weir plate without requiring severe adjustment. That is, at the time of liquid level adjustment, unlike the conventional level sensor, there is no need to repeat the liquid level test, and the liquid level can be easily adjusted by visually adjusting the height of the weir plate. At the time of maintenance, it is only necessary to check the height of the weir plate, and the need for readjustment can be eliminated as compared with the level detection by a conventional level sensor.

According to the third aspect of the present invention, the tank for receiving the liquid (adhesive) overflowing from the weir is formed by separating the adhesive collecting tank with the weir, that is, the wheel main body is provided with the adhesive collecting tank. The adhesive return tank is partitioned by a weir and integrally formed, so-called,
By adopting a two-tank structure, the wheel is more compact and simpler than having a separate return tank that receives the liquid overflowing from the weir, which is provided outside or near the adhesive reservoir on the wheel body. Can be configured.

According to the fourth aspect of the present invention, when the adhesive flowing into the adhesive return tank from the adhesive storage tank through the weir reaches the predetermined height level, it is detected by the level sensor, and the level of the sensor is detected. For example, when the circulation pump for the adhesive is activated by the detection signal, the adhesive is returned to the adhesive melting supply device through the adhesive discharge port and the adhesive return pipe provided in the return tank. As a result, the returned adhesive can be supplied again from the adhesive melting and supplying device to the adhesive storage tank of the wheel body and used in a circulating manner, so that the adhesive is completely wasted. Absent.

According to the fifth aspect of the present invention, the adhesive that has flowed into the adhesive return tank from the adhesive storage tank through the weir and falls into the adhesive return tank naturally falls through the adhesive discharge port and the adhesive return pipe provided in the return tank. (Gravity drop), and is returned to the adhesive melting supply device. Therefore, it is not necessary to install a level sensor for detecting the liquid level of the adhesive accumulated in the adhesive return tank as described above and discharging the adhesive from the return tank. It is not necessary to provide a circulation pump for forcibly returning the accumulated adhesive, for example, as described above, and the wheel can be formed compact overall.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view (partially front view) showing an embodiment of a wheel of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a front view showing an embodiment of a weir used for the wheel of the present invention.

FIG. 4 is a plan view of FIG. 3;

5 is a cross-sectional view taken along line AA of FIG. 3, showing a state in which a weir plate is placed at a lowest level.

FIG. 6 is a cross-sectional view taken along line AA of FIG. 3, showing a state in which the weir plate is placed at a higher level.

FIG. 7 is a longitudinal sectional view (partial front view) showing another embodiment of the wheel of the present invention.

FIG. 8 is a longitudinal sectional view (partial front view) showing an embodiment of a conventional wheel.

FIG. 9 is a right side view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 20 Wheel 1a, 20a Wheel main body 2 Roll 3, 21 Adhesive reservoir 4 Adhesive valve actuation level sensor 5 Overflow detection level sensor 8 Manifold 9 Adhesive (hot melt) valve 12 Adhesive melt supply device 13 Adhesion Agent supply hose 15 Adhesive 20b Adhesive supply port (reservoir) 22 Weir (weir) 23 Weir body 23a Weir opening 24 Weir plate 24a Overflow surface (weir upper surface) 26 Slide rail 28 Weir height adjusting bolt 30 Adhesive Return tank 30a Adhesive discharge port (return tank) 31 Level sensor for circulating pump operation 32 Level sensor for overflow detection 35, 40 Manifold 35b, 35c First and second adhesive supply passages (manifold) 35a, 35d, 35e First, second and third adhesive return passages (manifold 36 circulation pump 37 back adhesive return hose 40a adhesive passage (manifold) 40b, 40c first, for returning the second adhesive supply passage (manifold) 41 adhesive pipe

Claims (5)

[Claims] 1. A wheel rotatably provided with a roll for adhering an adhesive to a peripheral surface inside an adhesive storage tank of a main body and transferring the adhesive to another roller or the like, wherein the adhesive storage tank is provided. A wheel provided with a weir capable of adjusting the liquid level of the adhesive. 2. The wheel according to claim 1, wherein the weir is provided with a weir plate for adjusting the liquid level of the adhesive so as to be vertically movable. 3. The adhesive collecting tank further includes an adhesive return tank for receiving the adhesive overflowing from the collecting tank and overflowing the weir, separated by the weir, and formed integrally with the wheel body. The wheel according to claim 1 or 2, wherein: 4. The adhesive return tank is further provided with a level sensor and an adhesive discharge port for detecting an amount of the accumulated adhesive in the return tank, and the adhesive discharge port and the adhesive melt supply device. An adhesive return line for connecting the adhesive return line for detecting the rise in the level of the adhesive in the return tank by the level sensor and returning the adhesive to the adhesive melting supply device. The wheel according to claim 3, wherein 5. An adhesive discharge port is attached to the adhesive return tank, and the adhesive accumulated in the adhesive return tank is flowed between the adhesive discharge port and the adhesive melt supply device by natural flow. 4. The wheel according to claim 3, wherein an adhesive return line for returning the melt to the melt supply device is provided.