JP4968962B2 - Container mouth side application device - Google Patents

Description

  The present invention relates to a container mouth side surface coating apparatus that applies a coating liquid, various treatment liquids such as a water repellent treatment, and a liquid such as a paint to a side surface of a container mouth such as a glass bottle.

As shown in the following Patent Documents 1 to 3, there is known a coating apparatus that applies a coating liquid impregnated on a coating surface of a rotating endless coating belt in contact with the coating surface of the container.
In any of these, the coating liquid is applied to the entire outer peripheral surface of the container while rotating the container flowing on the conveyor by a rotating means.
The coating apparatus of Patent Document 1 is of a type that supplies the coating liquid directly to the coating surface of the coating belt with an injection needle.
The coating apparatus of Patent Document 2 is of a type that replenishes the coating liquid from the upper part of the sponge roller and transfers the coating liquid by bringing the coating belt coating surface into contact with the sponge roller.
The coating apparatus of Patent Document 3 is of a type in which a coating liquid is dropped onto a first roller, the coating liquid is transferred to a second roller, and the coating liquid is transferred from the second roller to the coating surface of the coating belt. is there.

JP 60-33232 A Japanese Utility Model Publication No. 62-199175 JP 59-228973 A

In the type of Patent Document 1, as shown in FIG. 1, since the application liquid is directly supplied to the application surface of the application belt with an injection needle, uneven adhesion of the liquid occurs in both the vertical direction and the length direction of the application belt application surface. As a result, uneven application to the container tends to occur. Also, since the coating amount must be controlled by the amount of coating solution supplied from the injection solution, the control system becomes complicated, and in particular, a very small amount is applied as in the case where the coating solution is a water repellent treatment agent. There is a problem that accurate control is not possible.
Since the type of Patent Document 2 uses a sponge roller, adhesion unevenness in the vertical direction and the length direction of the application belt application surface is slightly improved, but it is not sufficient. Further, since the coating amount must be controlled by the amount of the coating liquid to be replenished to the sponge roller, the control system becomes complicated as in the case of Patent Document 1, and in particular, the coating liquid is a water repellent treatment agent. As is the case, there is a problem that accurate control is not possible when a very small amount is applied.
Since the type of Patent Document 3 uses two rollers, the coating unevenness is improved as compared with Patent Document 2, but it is still insufficient, and the amount of coating liquid dropped onto the first roller is still insufficient. Since the amount must be controlled, there is the same problem as in Patent Documents 1 and 2.
Further, as a problem common to Patent Documents 1 to 3, when these coating apparatuses are used for coating the side surface of the container mouth portion, the coating belt tends to move upward due to the influence of the bead or screw thread of the mouth portion. In some cases, the coating liquid cannot be accurately applied to the portion to be coated.

  The present invention makes it possible to apply the coating liquid to the part to be coated on the side surface of the container mouth part, and to improve the uneven adhesion of the coating liquid on the coating belt coating surface to make the coating liquid uniform on the outer surface of the container. The ability to apply, and the amount of coating solution applied to the container can be easily controlled, and even when a very small amount is applied, such as when the coating solution is a water repellent, It is a problem to be able to do.

[Claim 1]
The present invention relates to a coating apparatus for applying a coating liquid impregnated on a coating mouth side surface by bringing the coating surface of a rotating endless coating belt into contact with the container mouth side surface,
A container mouth side surface coating apparatus comprising a pressing roller that contacts an upper surface of the coating belt, rotates in response to movement of the coating belt, and suppresses displacement of the coating belt upward.
In the present invention, since the application belt is prevented from being displaced upward by the pressing roller, the application liquid can be applied to an appropriate position.

[Claim 2]
The present invention also provides
A rotating felt roller whose outer peripheral surface is always replenished with coating liquid,
A transfer roller that always rotates while the outer peripheral surface is in contact with the coating belt and transfers the coating liquid impregnated on the outer peripheral surface to the coating belt coating surface;
A liquid receiving position where the outer peripheral surface contacts the outer peripheral surface of the felt roller and receives the coating liquid from the felt roller, a liquid passing position where the outer peripheral surface contacts the outer peripheral surface of the transfer roller and passes the coating liquid to the transfer roller, the felt roller, A delivery roller that moves in a standby position that does not contact any of the transfer rollers;
Drive means for moving the delivery roller;
The container mouth side surface coating apparatus according to claim 1, further comprising a control means for controlling the driving means.

FIG. 2 is an explanatory view of the number of rollers and unevenness of adhesion of the coating liquid to the coating belt. Assuming that the coating liquid is intermittently supplied to the first roller, the change in the amount of adhesion to the coating belt coating surface between the supply of the coating liquid to the first roller and the next supply (long) (Direction) is represented by color intensity. In the figure, the downward arrow position indicates when the coating liquid is supplied to the first roller.
As shown in FIG. 2, in general, the larger the number of rollers, the smaller the unevenness of adhesion (the difference in the amount of adhesion between the maximum amount adhesion location and the minimum amount adhesion location).
Also, the uneven adhesion in the vertical direction tends to decrease as the number of rollers increases.
Since the present invention uses three rollers, there is little adhesion unevenness.

  In the present invention, since the delivery roller moves between the liquid receiving position, the liquid delivery position, and the standby position, the time that the delivery roller stays at the liquid delivery position (liquid delivery time), the time that the delivery roller stays at the liquid delivery position (liquid delivery time), The amount of coating liquid impregnated in the coating belt can be controlled by appropriately setting the time for staying at the standby position (standby time), so the control system becomes very simple and does not control the amount of liquid dripped onto the roller. Therefore, accurate control can be performed even when a very small amount is applied to the container, as in the case where the coating liquid is a water repellent treatment agent.

[Claim 3]
According to the present invention, the felt roller is provided with a rotating shaft vertically suspended, and the coating liquid is replenished from the upper part of the felt roller. The felt roller includes a coating liquid receiving pan that receives excess coating liquid below the felt roller. The container mouth side surface coating apparatus according to claim 2, wherein a lower portion of the outer peripheral surface is immersed in a coating liquid in the receiving pan.

Since the coating liquid receiving pan for receiving the excessive coating liquid is provided below the felt roller, it is not necessary to control the amount of the replenishing liquid (it should be replenished more than necessary), and the replenishing coating liquid is felt. Since the roller extends from the upper part to the lower part, and the lower part is immersed in the coating liquid in the receiving pan, the amount of impregnation in the lower part also increases due to capillary action. As a result, the unevenness in the amount of impregnation in the vertical direction of the felt roller is extremely reduced, and the unevenness in the vertical direction on the coating belt application surface to be transferred is eliminated.
The felt roller of the present invention does not necessarily use a felt, and may use a sponge, a nonwoven fabric or the like having substantially the same liquid holding performance.

[Claim 4]
The present invention also includes a sensor for detecting a container introduced into the apparatus, wherein the control means counts the number of containers introduced by a detection signal of the sensor, and the driving means is based on the counted number of containers. It is a container mouth part side surface coating device of Claim 2 or 3 which controls.

  For example, in the case of a glass bottle production line, when the interval between bottles flowing on the conveyor is not constant and the number of bottles applied per unit time is different, the drive means is controlled based on the counted number of containers, The coating liquid applied to the container by applying the coating process to a certain number of containers every cycle of the transfer roller movement (for example, one cycle of the liquid receiving position → the liquid passing position → the standby position). The amount of can be kept constant.

[Claim 5]
Moreover, this invention is a container opening part side surface coating apparatus of Claim 4 which controls the time when the said control means stays in the said waiting position based on the said counted number of containers.

  By controlling the time during which the delivery roller stays at the standby position (standby time) based on the number of containers counted by the control means (such as a computer), the amount of coating liquid applied to the containers can be easily kept constant. it can. In this case, since the liquid receiving time and the liquid passing time are set to predetermined times, the amount of liquid received by the delivery roller from the felt roller and the amount of liquid delivered by the delivery roller to the transfer roller are constant, and the movement of the delivery roller Since a certain number of containers are coated every cycle (for example, one cycle from the liquid receiving position to the liquid delivery position to the standby position), the amount of coating liquid applied to the containers is constant. In addition to the waiting time or in place of the waiting time, the liquid receiving time and / or the liquid passing time can be controlled to make the amount of the coating liquid applied to the container constant, but only the waiting time is controlled. It is the easiest to do.

[Claim 6]
Moreover, this invention is a container mouth part side surface coating device in any one of Claims 1-5 provided with the rotation means to rotate a container at the time of application | coating.
By rotating the container, the coating liquid can be attached over the entire circumference of the side surface of the container. The rotating means can be freely selected, and a known rotating means can be used.

[Claim 7]
Further, the present invention is the container mouth side surface coating apparatus according to any one of claims 1 to 6, wherein the coating belt has two in total, one on each side of the container mouth.

[Claim 8]
The present invention is also the container mouth side surface coating apparatus according to claim 7, wherein upper ends of the coating surfaces of the two coating belts protrude above the top surface of the container mouth.

[Claim 9]
Further, in the present invention, of the two coating belts, one has an upper end of the coating surface protruding above the top surface of the container mouth, and the other has an upper end of the coating surface below the top surface of the container mouth. 7 is a container mouth side surface coating apparatus.

[Claim 10]
The present invention is the container mouth side surface coating apparatus according to any one of claims 7 to 9, wherein the two coating belts rotate with a speed difference.

[Claim 11]
Further, the present invention is the container mouth side surface coating apparatus according to claim 10, wherein the two coating belts are rotating means for rotating the container during coating.

For example, when a treatment liquid for water repellent treatment is applied to the outer peripheral surface of the container mouth, the treatment liquid is surely adhered to the valleys of the screw and a sufficient amount is also adhered to the R surface portion at the upper end of the outer peripheral surface. There is a request.
In such a case, if the upper end of the application surface of the two application belts contacting the outer peripheral surface of the container mouth protrudes upward from the top surface of the container mouth, the R surface at the upper end of the outer peripheral surface is also formed in the valley of the screw. In addition, the treatment liquid can be sufficiently adhered.

There is also a demand for the treatment liquid to adhere to the valleys of the screw reliably and to attach an appropriate amount not too much to the R surface portion at the upper end of the outer peripheral surface.
In such a case, of the two coating belts that contact the outer peripheral surface of the container mouth, one of the upper surfaces of the coating surfaces protrudes higher than the top of the container mouth, and the other of the two coating belts has the upper end of the coating surface of the container mouth. If it is below the surface, it is possible to prevent poor adhesion between the valleys of the screw, and at the same time, it is not necessary to attach an excessive amount of processing liquid to the R surface portion at the upper end of the outer peripheral surface.

  When applying to the outer surface of a container having an uneven surface, such as a container mouth part with a thread, a two-part application belt is provided on both sides of the container, for example, a recess such as a screw valley In addition, the coating liquid can be reliably applied. In this case, if each coating belt rotates with a speed difference, a rotational force is applied to the container by the frictional force between the coating belt and the outer surface of the container, and the coating belt can also serve as a container rotating means. .

In the present invention, since the application belt is prevented from being displaced upward by the pressing roller, the application liquid can be reliably applied to a predetermined position on the side surface of the container mouth.
In addition, the coating liquid can be uniformly applied to the side surface of the container mouth by improving the uneven adhesion of the coating liquid to the coating belt coating surface.
Furthermore, the amount of the coating solution applied to the container can be easily controlled, and even when a very small amount of coating solution is applied to the side surface of the container mouth, a predetermined coating amount can be applied accurately.

It is explanatory drawing of the conventional container mouth part side surface coating device. It is explanatory drawing of the number of rollers, and the adhesion nonuniformity of the coating liquid to a coating belt. It is a plane explanatory view of the container mouth side application device of an example. It is principal part side explanatory drawing of the container mouth part side surface coating apparatus of an Example. It is a plane explanatory view of a container mouth side application device of other examples. It is sectional drawing of a container opening part and an application belt. It is sectional drawing of a container opening part and an application belt. It is an expanded sectional explanatory view of a container mouth part. It is a flowchart of an example of a control method. It is explanatory drawing of the impregnation amount of a delivery roller, a transfer roller, and a coating belt. It is explanatory drawing of the flow of the signal in a control means. It is a flowchart of an example of a control method.

  Hereinafter, the present invention will be described in detail with reference to the drawings relating to the embodiments. FIG. 3 is an explanatory plan view of the container mouth side surface coating apparatus of the embodiment, FIG. 4 is an explanatory side view of the main part of the container mouth side surface coating apparatus of the embodiment, and FIG. 5 is a container mouth side surface coating apparatus of another embodiment. 6 and 7 are sectional views of the container mouth portion and the coating belt, FIG. 8 is an enlarged sectional view of the container mouth portion, FIG. 9 is a flowchart of an example of the control method, and FIG. 10 is a delivery roller and a transfer roller. FIG. 11 is an explanatory diagram of the flow of signals in the control means, and FIG. 12 is a flowchart of an example of the control method.

  3 and 4 includes a coating belt 1, a felt roller 2, a transfer roller 3, a delivery roller 4, and the like. The coating belt 1 is an endless state in which both ends of a belt having an appropriate length are connected, and the outer surface is a coating surface made of a material impregnated with liquid such as cloth material or sponge. The application belt 1 is stretched over the drive pulley 7 and the passive pulleys 8 and 9 and rotates according to the rotation of the drive pulley 7. The coating belt 1 is pressed against the mouth side surface of the container 20 flowing on the conveyor by rotating according to five passive pulleys 9 provided along one side of the conveyor 14 which is a moving means of the container 20. To do. A pressing plate 15 is provided along the opposite side of the conveyor 14, and the container 20 on the conveyor is sandwiched between the application belt 1 and the pressing plate 15 from both sides. The application belt 1 rotates clockwise in FIG. 3, and moves in the same direction as the flow direction of the conveyor 14 in the section of the passive pulley 9, and the movement speed of the application belt is the same as or higher than the movement speed of the conveyor. The container 20 moves on the conveyor while rotating counterclockwise. During this time, the coating surface of the coating belt 1 contacts the entire circumference of the mouth side surface of the container 20, and the coating liquid impregnated in the coating surface is coated on the mouth side surface of the container.

  The felt roller 2 has an outer peripheral surface made of a material having a large liquid holding performance such as felt, sponge, nonwoven fabric, and the like, and the rotation of a motor (not shown) is transmitted to the vertical rotating shaft 2a. 4). The coating liquid 18 is dropped from above by the supply pipe 12, and the coating liquid is always replenished to the felt or the like on the outer peripheral surface. A coating solution receiving pan 10 for receiving an excess coating solution is provided below the felt roller 2, and the coating solution 18 replenished by the supply pipe 12 passes through the felt or the like on the outer peripheral surface from the top to the bottom. The liquid is collected in the coating liquid receiving pan 10. Furthermore, the lower part of the outer peripheral surface of the felt roller 2 is immersed in the coating liquid 18 inside the receiving pan 10. For this reason, the felt roller 2 is always impregnated with a substantially constant amount of coating liquid without any unevenness, and a substantially constant amount of coating liquid is always transferred (transferred) to a delivery roller described later. Since the coating liquid accumulated in the receiving pan 10 overflows and is sent to the service tank 11 through the return pipe 13, the liquid level of the coating liquid in the receiving pan 10 is always constant. The coating liquid in the service tank 11 is sent out to the supply pipe 12 by the pump P, and the felt roller 2 is replenished with the coating liquid.

The transfer roller 3 is composed of a material impregnated with liquid, such as a cloth material or sponge, and always comes into contact with the application surface of the application belt 1 and rotates as the application belt rotates. The received coating liquid is transferred to the coating surface of the coating belt.
When it is desired to keep the transfer amount to a very small amount, it is possible to keep the transfer amount to a very small amount by selecting a metal or resin roller having a flat surface.

The delivery roller 4 is made of a material impregnated with liquid, such as a cloth material or sponge, and is rotatably attached to the tip of the arm 5. The arm 5 is rotated by the delivery roller driving means 6 (step motor) so that the delivery roller 4 moves between the liquid receiving position A, the liquid passing position B, and the standby position C.
At the liquid receiving position A, the outer peripheral surface of the delivery roller 4 is in contact with the outer peripheral surface of the felt roller 2, and the coating liquid is transferred to the entire outer peripheral surface while rotating as the felt roller 2 rotates.
At the liquid transfer position B, the transfer roller 4 has its outer peripheral surface in contact with the outer peripheral surface of the transfer roller 3, and rotates with the rotation of the transfer roller 3, while the coating liquid impregnated on the outer peripheral surface is transferred to the transfer roller 4. Transcript to.
The standby position C is a position where the delivery roller 4 is not in contact with the felt roller 2 or the transfer roller 3.
In addition, the delivery roller 4 can also minimize the amount of delivery of the coating liquid by selecting a metal or resin roller having a flat surface.

  The driving means for moving the delivery roller is controlled by a control means such as a computer or a sequencer. A specific example of control will be described later.

In FIG. 3, four pressing rollers 19 are provided between the five passive pulleys 9 along the container moving means (conveyor 14). The pressing roller 19 is rotatably attached to the frame 25, and the outer peripheral surface of the tip portion thereof contacts the upper surface of the coating belt 1 and rotates as the coating belt 1 moves. The pressing roller 19 prevents the coating belt 1 from moving upward.
Thus, it is not necessary to provide the pressing roller in the entire region where the coating belt rotates, and it is only necessary to provide the pressing roller in the region where coating is performed on the container.
The axis (rotation axis) of the pressing roller 19 is such that the vertical angle (side view) is parallel to the upper surface of the application belt, and the horizontal angle (plan view) is perpendicular to the application belt 1 and the conveyor 14. Although it is desirable, there may be an angle of about 30 ° or less.
The pressing roller 19 may be freely mounted on the shaft and rotated by the movement of the coating belt 1 or may be forcibly rotated by a motor or the like at substantially the same peripheral speed as the movement speed of the coating belt. Good.

FIG. 5 shows an example in which a coating belt 1 ′ similar to the coating belt 1 in FIG. 3 is provided on the opposite side of the conveyor 14, and two coating belts are installed, one on each side across the container mouth. is there. In this example, the mouth of the container (glass bottle) is subjected to water repellent treatment, and the coating liquid is a water repellent treatment agent (silicone oil or the like). Felt rollers, transfer rollers, delivery rollers, arms, driving means, coating liquid receiving pans, service tanks, supply pipes, and return pipes similar to those in FIG. 3 are provided for both coating belts 1 and 1 ′. It is omitted in the figure.
Since the application belts 1 and 1 'rotate in the same direction (clockwise), the application belt 1 is in the same direction as the conveyor flow direction, and the application belt 1' is the opposite direction to the conveyor flow direction between the passive pulleys 9 and 9. Due to the difference in the moving speed of the coating belts 1 and 1 ′ and the conveyor, the container 20 advances in the flow direction of the conveyor while rotating, and the side surface of the mouth contacts the coating surface of the coating belts 1 and 1 ′. The coating liquid is applied to the entire outer periphery. In this case, the coating belts 1 and 1 ′ also serve as the container rotating means, but the container rotating means may be provided separately.

6 and 7 show a state where the application belts 1 and 1 'are in pressure contact with both sides of the container 20 mouth.
The coating belts 1 and 1 ′ are both base belts 1a and 1a ′ made of a highly elastic material such as urethane rubber on the outside of the timing belts 1d and 1d ′, and a highly elastic material such as foamed resin and synthetic rubber on the outside thereof. Belts 1b and 1b ', and cloth materials 1c and 1c' (woven with synthetic fibers) constituting the coating surface are attached to the outside thereof. The timing belts 1d and 1d 'are formed with tooth forms 1e and 1e' that mesh with the tooth form of the pulley. Further, the upper surfaces of the base belts 1a and 1a 'are the highest, and only the upper surfaces of the base belts 1a and 1a' are in contact with the pressing roller 19, and the cloth materials 1c and 1c 'and the timing belts 1d and 1d are contacted. 'Do not touch. By doing in this way, even if it presses with the pressing roller 19, the application belt 1 does not tilt.
The application belt 1 tends to rise upward due to the influence of the screw thread 26 and the bead 27 at the container mouth, but this is prevented by the pressing roller 19.

  In FIG. 6, the upper end of the application surface (cloth material 1c, 1c ') of the application belt 1, 1' protrudes upward from the top surface of the container mouth. The widths of the application surfaces of the application belts 1 and 1 'are both 19 mm.

  In FIG. 7, the upper end of the application surface (cloth material 1c) of the application belt 1 projects upward from the top surface of the container mouth, and the upper end of the application surface of the other application belt 1 ′ (cloth material 1c ′) is the top surface of the container mouth. The width (height) of the coated surface is different so as to be lower. The width of the coating surface of the coating belt 1 is 19 mm, and the coating belt 1 ′ is 9 mm. The reason for this will be described with reference to FIG.

FIG. 8 shows a state where the coating liquid is applied to the outer peripheral surface of the container mouth. In the figure, reference numeral 20 is a container, 21 is an outer peripheral surface of the mouth, 22 is a top surface, 23 is an R surface, 24 is an inner peripheral surface of the mouth, and 18 is a coating liquid (silicone oil).
The uppermost part of the outer peripheral surface of the mouth portion is an R surface portion 23, and the silicone oil is attached to the mouth side surface 21 including the R surface portion 23. As described above, when the silicone oil is baked in a state where the silicone oil is adhered to the R surface portion 23, the silicone oil is heated to increase the fluidity, and spreads on the top surface 22 in the direction of arrow D, so that the entire top surface 22 Partly flows into and adheres to the inner peripheral surface 24. Thus, silicone oil has the property of spreading very widely when heated at high temperatures. Silicone oil is said to be harmless to the human body, but it is not preferable that the silicone film be formed up to the wrinkles inside the container that do not require water repellent treatment. If silicone adheres excessively to the R surface portion 23, the silicone flows into the ridges inside the container, and if too little, the water repellent treatment is incomplete without reaching the entire top surface. Therefore, it is necessary to keep the amount of silicone adhered to the R surface portion strictly within a certain range.

One means for adjusting the amount of silicone to be adhered to the R-surface portion is to adjust the degree of pressing of the coating belt against the container mouth and the contact angle. When the pressing force is increased, the amount of interference between the coating belt and the container mouth increases, and the amount of adhesion on the R surface increases too much. If the pressing force is weakened, the amount of adhesion of the R surface portion can be made moderate, but the adhesion to the thread valley of the outer periphery of the mouth becomes insufficient, and the water repellent treatment of the portion becomes incomplete. Another means for adjusting the amount of silicone deposited on the R surface is to incline the coating belt toward the container. Increasing the slope increases the amount of adhesion on the R surface, but the adhesion to the thread valleys on the outer periphery of the mouth becomes insufficient, and the water-repellent treatment at that portion becomes incomplete.
In the example of FIG. 8, the amount of silicone attached to the R surface portion by the application belt 1 is appropriate, and the application belt 1 ′ also sufficiently attaches to the thread valley of the outer periphery of the mouth. In this case, the angle of the coating belt 1 is vertical, but it may be inclined to the container side.

FIG. 9 shows an example of control by the control means (repetitive routine portion). This is suitable for the case where the containers are carried on the conveyor at substantially constant intervals (when the number of containers to be applied per unit time is substantially constant).
In this case, appropriate times for the delivery roller 4 to stay at the liquid receiving position A, the liquid delivery position B, and the standby position C are set in advance in the control means.

In step 101 “moving to the liquid receiving position A”, the delivery roller 4 moves to the liquid receiving position A.
In step 102, “delivering at the liquid receiving position A for a predetermined time”, the delivery roller 4 comes into contact with the felt roller 2 for a predetermined time, thereby receiving a predetermined amount of coating liquid from the felt roller.
In step 103 “moving to the liquid transfer position B”, the transfer roller 4 moves to the liquid transfer position B.
In step 104, “stays at the liquid transfer position B for a predetermined time”, the transfer roller 4 contacts the transfer roller 3 for a predetermined time, thereby transferring a predetermined amount of coating liquid to the transfer roller. By appropriately setting this time, it is possible to prevent the transfer roller and the application belt from being impregnated with an excessive application liquid and the amount of application to the container being excessively increased.
In step 105 “transfer to standby position C”, the delivery roller 4 moves to standby position C.
In step 106, “stay at the standby position C for a predetermined time”, the delivery roller 4 waits for a predetermined time set in advance. By appropriately setting this time, it is possible to prevent the amount of the coating liquid impregnated on the transfer roller and the coating belt from being excessively increased or decreased and to maintain the applied amount on the container in a desired range. .
According to the present invention, the amount of the coating liquid applied to the container can be kept within a predetermined range by the very simple control as described above.

FIG. 10 shows the change in the amount of impregnation of the application liquid of the delivery roller 4, the transfer roller 3, and the application belt 1 when the control is performed as shown in FIG. In this case, a small amount of coating liquid (water repellent treatment agent) is applied to the container mouth. In order to keep the coating amount on the container within an appropriate range, the impregnation amount of the coating belt needs to be within the range of the broken lines of “the upper limit of the coating solution impregnation amount” and “the lower limit of the coating solution impregnation amount”. Due to the above control, the impregnation amount of the coating belt always changes within this range. In the figure, “a” is when the delivery roller 4 is moved to the liquid receiving position A (step 101), “b” is moved to the liquid delivery position B (step 103), and “c” is at the standby position C. It shows the time of movement (step 105).
According to the present invention, the amount of the coating liquid applied to the container can be kept within a predetermined range by the very simple control as described above. In particular, as in this example, accurate control is possible even when the amount applied to the container is very small.

Next, a case where the containers are not carried on the conveyor at almost regular intervals (when the number of containers applied per unit time is different) will be described.
For such a case, in FIGS. 3 and 5, a sensor 16 for detecting a container introduced into the coating device is provided beside the conveyor 14 immediately upstream of the coating belt 1. That is, each time a container is introduced into the apparatus, the sensor 16 sends one detection signal to the control means 17, and the control means counts the detection signal to grasp the number of containers introduced into the apparatus. Based on this, a control signal is sent to the delivery roller driving means 6 to operate the driving means 6 (FIG. 11).

  FIG. 12 shows an example of control by the control means in such a case (repetitive routine portion). In the case of this example, an appropriate time for each of the delivery rollers 4 to stay at the liquid delivery position A and the liquid delivery position B is set in advance in the control means, and no time to stay at the standby position C is set. Instead, the number of containers to be applied in one cycle of the delivery roller movement is set.

In step 201 “transfer to liquid receiving position A”, the delivery roller 4 moves to liquid receiving position A.
In step 202, “Dwelling at the liquid receiving position A for a predetermined time”, the delivery roller 4 contacts the felt roller 2 for a predetermined time, thereby receiving a predetermined amount of coating liquid from the felt roller.
In step 203 “transfer to the liquid transfer position B”, the transfer roller 4 moves to the liquid transfer position B.
In step 204, “stays at the liquid delivery position B for a predetermined time”, the delivery roller 4 contacts the transfer roller 3 for a predetermined time, thereby delivering a predetermined amount of coating liquid to the transfer roller. By appropriately setting this time, it is possible to prevent the transfer roller and the application belt from being impregnated with an excessive application liquid and the amount of application to the container being excessively increased.
The delivery roller 4 moves to the standby position C by “move to standby position C” in step 205.
In step 206 “read the number of containers”, the number of containers counted so far stored in the memory is read.
In step 207 “whether the predetermined number has been reached?”, The number of containers read in step 206 is compared with a preset number of containers to determine whether the predetermined number has been reached. If “YES”, the number of containers in the memory is reset and the process proceeds to step 201. In the case of “NO”, the process returns to step 206 and the operation of “read the number of containers” is performed again. For the movement from step 207 to step 206, an appropriate time lag (for example, 3 seconds) may be set. Step 207 → step 206 → step 207 is repeated until the number of containers in the memory reaches the set number of containers.
As a result, even when the containers are not carried on the conveyor at almost regular intervals (when the number of containers to be applied per unit time is different), the application applied to the containers with the above simple control. The amount of the liquid can be kept within a predetermined range, and the temporal change in the amount of the application liquid impregnated in the delivery roller 4, the transfer roller 3, and the application belt 1 is the same as that shown in FIG.

DESCRIPTION OF SYMBOLS 1 Application belt 2 Felt roller 3 Transfer roller 4 Delivery roller 5 Arm 6 Drive means 7 Drive pulley 8 Passive pulley 9 Passive pulley 10 Application liquid receiving pan 11 Service tank 12 Supply pipe 13 Return pipe 14 Conveyor 15 Pressing plate 16 Sensor 17 Control Means 18 Coating liquid 19 Pressing roller 20 Container 21 Outer peripheral surface 22 Top surface 23 R surface portion 24 Inner peripheral surface 25 Frame 26 Thread 27 Bead

Claims (11)

In a coating apparatus that applies the coating liquid impregnated in the coating surface by contacting the coating surface of the rotating endless coating belt with the side surface of the container mouth,
A container mouth side surface coating apparatus, comprising: a pressing roller that contacts an upper surface of the coating belt, rotates in response to movement of the coating belt, and suppresses displacement of the coating belt upward. A rotating felt roller whose outer peripheral surface is always replenished with coating liquid,
A transfer roller that always rotates while the outer peripheral surface is in contact with the coating belt and transfers the coating liquid impregnated on the outer peripheral surface to the coating belt coating surface;
A liquid receiving position where the outer peripheral surface contacts the outer peripheral surface of the felt roller and receives the coating liquid from the felt roller, a liquid passing position where the outer peripheral surface contacts the outer peripheral surface of the transfer roller and passes the coating liquid to the transfer roller, the felt roller, A delivery roller that moves in a standby position that does not contact any of the transfer rollers;
Drive means for moving the delivery roller;
2. The container mouth side surface coating apparatus according to claim 1, further comprising a control means for controlling the driving means.   The felt roller is provided with a rotating shaft and is replenished with coating liquid from the top of the felt roller. The felt roller is provided with a coating liquid receiving pan for receiving excess coating liquid below the felt roller. The container mouth part side surface coating apparatus of Claim 2 immersed in the coating liquid in the receiving pan.   A sensor for detecting a container introduced into the apparatus is provided, and the control means counts the number of containers introduced by a detection signal of the sensor, and controls the driving means based on the counted number of containers. 2 or 3 container mouth side application device.   5. The container mouth side surface coating apparatus according to claim 4, wherein the control unit controls a time during which the delivery roller stays at the standby position based on the counted number of containers.   The container mouth side surface coating apparatus according to any one of claims 1 to 5, further comprising a rotating means for rotating the container during coating.   The container mouth side surface coating apparatus according to any one of claims 1 to 6, wherein there are a total of two coating belts, one on each side of the container belt.   The container mouth side surface coating apparatus according to claim 7, wherein upper ends of the coating surfaces of the two coating belts protrude upward from the top surface of the container mouth.   8. The container mouth portion according to claim 7, wherein one of the two application belts has an upper end of the application surface protruding above the top surface of the container mouth portion, and the other upper end of the application surface is below the top surface of the container mouth portion. Side coating device.   The container mouth side surface coating apparatus according to claim 7, wherein the two coating belts rotate with a speed difference.   The container mouth side surface coating apparatus according to claim 10, wherein the two coating belts are rotating means for rotating the container during coating.