JP4868987B2 - Container lid foreign substance removal device - Google Patents

Description

  The present invention relates to a foreign matter removing apparatus for a container lid that removes foreign matter adhering to a container lid such as a can lid.

Conventionally, various methods and apparatuses have been proposed for cleaning a container lid such as a metal lid or a synthetic resin lid to be supplied to a winding device or a capper before being attached to the container. For example, a container lid (hereinafter simply referred to as a lid) of a can lid that is supplied to a winding device is transported at a predetermined interval while being rotated, and the inner and outer surfaces of the lid are sterilized by irradiation with ultraviolet rays during transportation (for example, Patent Documents 1 and 2), or a method of spraying cleaning water on a lid that is transported while rotating at a similar interval (see, for example, Patent Document 3), or heating water on a lid that is being transported A method of sterilizing by spraying water vapor and then cooling and removing water (see Patent Documents 4 and 5) has been proposed.
Publication No. 2501253 Japanese Patent Publication No. 3-16148 JP-A-9-301326 JP 54-68378 A Japanese Patent Publication No.57-52062

  The proposed apparatus for sterilizing a lid with ultraviolet rays has a problem that even if the lid can be sterilized, foreign matters such as paper dust attached to the lid cannot be removed. In general, lids are stacked and packed with wrapping paper and shipped from lid manufacturers. Canning manufacturers cut and unpack the paper that is the packaging material with an unwrapper, but at that time, pieces of paper and paper dust are generated. Therefore, the piece of paper or paper dust may adhere to the lid. Moreover, there is a possibility that metal powder (in the case of a metal lid), resin powder or resin piece (in the case of a synthetic resin lid) generated at the time of manufacturing the lid adheres. Therefore, if it is mounted on the container in a state where it is simply sterilized by ultraviolet rays, foreign substances such as paper dust and paper pieces may be sealed in the product. On the other hand, the method of cleaning and sterilizing the lid with cleaning water or steam can remove foreign matters such as paper dust attached to the lid, but in that case, a cleaning device and a drying device are required, which requires large equipment and equipment costs. As a result, the installation space is increased and a large amount of washing water is required, resulting in a high running cost.

  As a means of solving this problem and removing foreign matters such as paper dust adhered to the lid, it is conceivable to blow paper dust etc. by blowing air on the inner and outer surfaces of the lid as a simple and inexpensive method. In this case, not only can dust be scattered in the air to worsen the environment, but also dust may be reattached, which cannot be employed. In order to prevent this, the paper dust removed from the lid can be removed without being scattered in the environment by blowing air from one side and sucking from the other while surrounding the transport path of the lid. From this point of view, the inventor made a prototype of the apparatus shown in FIGS. 6 and 7 and boxed the lid transport path formed by the screws 51 for separating the container lids one by one and transporting them with a gap. The foreign matter removal chamber 50 was configured to be surrounded by a shape, air was blown from one side by an air nozzle 52, a suction duct 53 was provided on the opposite side, and air was blown to the back and front of the lid 30 for the experiment. In the experiment, 10 pieces of hair, aluminum powder, resin powder, and paper powder adhered to the lid were introduced from the top, and the lid was sent at 1500 cpm at intervals of 20 mm, during which 4400 L / min of air was injected. Then, the whole number was observed at the lower outlet. The results are shown in Table 1. Almost all kinds of foreign matters were almost removed on the back side of the lid, but on the front side of the lid, some paper dust and aluminum powder remained, and the removal rate was 76% and the initial purpose could not be achieved. It was. In order to determine the cause, when paper dust is dropped into the foreign substance removal chamber 50, it is observed that the paper dust flies inside and turbulence is generated in the box. The case was found to have reattached after being removed from the lid.

  Therefore, the present invention can reliably remove foreign matter such as fine paper dust removed from the container lid by jetting air without reattaching to the container lid. It is an object of the present invention to provide a container lid foreign matter removing device that can be removed easily and reliably without using it, and that the device can be downsized and manufactured at low cost.

The foreign matter removing apparatus of the present invention that solves the above problems is a foreign matter removing device for removing a foreign matter from a container lid that is being transported. Open and arrange a plurality of air nozzles on one side of the container lid transport path, and form a foreign substance removal chamber by surrounding a space including at least the air nozzle and the container lid transport path facing the air nozzle in a box shape, A suction duct is disposed in communication with the foreign substance removal chamber on the opposite side of the air nozzle across the container lid conveyance path, and the suction duct inlet portion is formed in a throttle shape on the downstream side so as to face the air nozzle of the suction duct. The main structure is that a local concentration duct that is opened in the vicinity of the container lid conveying means and has a tapered shape on the downstream side is disposed in the inlet portion .

The side wall of the foreign matter removal chamber on the air nozzle side is opened to provide a filter to form an outside air intake, and the air suction amount of the suction duct is larger than the amount of air supplied from the air nozzle into the foreign matter removal chamber. By setting, the suction air amount can be increased and the foreign matter removing effect can be further enhanced without disturbing the lid feeding posture. The air nozzle is preferably disposed so that the nozzle angle is 0 to 30 ° with respect to the horizontal plane. Although the air jet flow jetted from the air nozzle can be parallel flow with the lid being transported through the container lid transport path, it is desirable to incline within the range of 30 ° and directly hit the lid surface in order to increase the foreign matter removing effect. If the inclination angle is too large beyond 0 °, the jet flow does not reach the end of the lid directly, and the removal rate decreases.

According to the foreign matter removing device of the present invention, foreign matter such as fine paper dust removed from the container lid by jetting air can be reliably removed without reattaching to the container lid. Therefore, in order to remove the foreign matter adhering to the container lid, it can be reliably removed with a simple and small inexpensive device without using washing water or steam as in the prior art. The installation space can be reduced and the speed can be increased. Further , the local concentration duct that is opened close to the container lid transfer means and has a tapered shape on the downstream side is disposed at the inlet portion of the suction duct that faces the air nozzle, so that the air jetted from the air nozzle hits it. It is possible to rectify by sucking locally concentrated in the vicinity of the lid, and more effectively enhance the effect of removing foreign matter from the lid. Further, according to the inventions of claims 2 and 3 , the air suction amount of the suction duct can be set to be larger than the air amount supplied from the air nozzle, and the suction air amount can be obtained without disturbing the feeding posture of the lid. The foreign matter removal effect can be further enhanced by increasing Furthermore, according to the invention of claim 4 , air can be effectively injected from the air nozzle onto the cover surface, and the foreign matter removing effect can be enhanced.

FIG. 1 shows an embodiment of the foreign matter removing apparatus of the present invention.
In the figure, reference numeral 1 denotes a screw for separating and feeding the lids 30 sent in a state of being continuously overlapped by the upstream chute 2 one by one at regular intervals, and three screws are arranged at intervals of 120 ° as shown in FIG. Then, the curled portion of the lid is supported at three points by the spiral groove and is conveyed at a constant interval while being rotated. A downstream chute 3 is disposed downstream of the screw and conveyed to the downstream end of the screw at equal intervals. The lid 30 is stacked again in the downstream chute 3 and supplied to a stacker of a lid supply turret to a seamer (not shown). The In the present embodiment, the foreign substance removal chamber 6 is configured by surrounding the section in which the screw 1 is disposed in a box shape with a frame. In the foreign matter removal chamber 6, one or a plurality of air supply pipes 11 are arranged along the lid transport direction (vertical direction), and the air supply pipe faces the lid passing through the foreign matter removal chamber 6. A plurality of air nozzles 12 for injecting air are arranged at a predetermined pitch. In this embodiment, as shown in FIG. 2, two air supply pipes 11 are arranged with one screw interposed therebetween, but the present invention is not limited to this.

  In the present embodiment, the foreign substance removal chamber 6 is formed in a substantially rectangular cross section, and an air inlet 8 is opened on one side wall 7 for the reason described later, and a filter 9 is provided at the air inlet. The other side wall facing the side wall 7 is open, and the suction duct 10 is disposed in the opening. As shown in FIGS. 1 and 2, the inlet portion 13 of the suction duct 10 is tapered from the top to the bottom and in the width direction (depth direction in FIG. 1) toward the center portion. It has a funnel shape squeezed to. Therefore, the bottom wall 24 of the inlet portion 13 of the suction duct 10 is connected to the bottom wall 5 of the foreign substance removal chamber 6 on the substantially same surface, and in this state, is connected to the rectangular piping portion 14 of the suction duct. In this way, the inlet portion 13 of the suction duct has an inlet end opening with the same opening area as the foreign matter removal chamber, and is gradually drawn along the downstream side so that it is blown into the foreign matter removal chamber so that the gap between the lids is reduced. The air that has passed is prevented from flowing back and is effectively guided to the piping portion of the suction duct.

  Further, in the present embodiment, a local concentration duct 18 is provided in order to rectify air that has been jetted from the air nozzle and passed between the lids in a concentrated manner and to guide the air into the suction duct 10. The local concentration duct 18 has an opening side that opens more than the diameter of the container lid 30 in the width direction, and the vertical direction opens to a height that includes a section in which the air nozzle 12 is disposed. , Which is arranged in the vicinity of the lid that passes through, and is jetted toward the lid from the air nozzle group so as to intensively suck the air flow that has passed through the lid. The local concentration duct 18 has both side walls 19 and an upper wall 20 on the upstream side tapered toward the passage of the lid, presenting a funnel portion 21 with a square cross section, and a downstream side with a tubular portion 22 with a square cross section. It extends into the piping part 14 of the duct 10. The local concentration duct 18 includes a funnel portion 21 and a cylindrical portion 22, the top wall 23 of the foreign substance removal chamber, the bottom wall 5, the front wall 15 and the rear wall 16, and the inner peripheral wall of the inlet portion of the suction duct 10. Arranged at intervals, the air in the foreign substance removal chamber passes from the outer peripheral portion of the local concentration duct 18 into the suction duct 10. Therefore, in the present embodiment, the foreign matter is removed by a combination of the suction duct 10 that sucks the air flow in the entire foreign matter removal chamber and the local concentration duct 18 that sucks locally. Although not shown in the drawing, the upstream end of the air supply pipe 11 is connected to a blower, and a dust collector is provided on the downstream side of the suction duct 10 so as to suck and collect dust that has been blown away, The amount of air supplied to the air nozzle and the amount of suction air can be set arbitrarily.

  The container lid foreign matter removing apparatus of the present embodiment is configured as described above, and the lid 30 continuously conveyed in a stacked manner from the upstream chute 2 is opened at predetermined intervals (for example, 20 mm) by three screws. And is conveyed downward while rotating (rotating) one by one. Meanwhile, air is jetted from the air nozzle 12 group toward the transport path of the lid, and the lid 30 is exposed to the jet air every time it passes through the position, so that the foreign matter attached to the inner and outer surfaces is exposed. Blown away. In the illustrated embodiment, the air nozzles 12 are provided in five stages, so that the lid can be directly sprayed with spray air five times while passing through the foreign substance removal chamber 6. On the other hand, the air ejected from the air nozzle by the dust collector provided downstream of the suction duct 10 passes between the container lids and is actively sucked into the suction duct. At that time, since the inlet portion 13 of the suction duct is narrowed in the foreign substance removal chamber, the air flow that has passed between the lids is arranged in one direction and smoothly flows into the suction duct. There is no possibility that the foreign matter once removed from the lid will be reattached, and the foreign matter can be reliably removed. In particular, in the present embodiment, the local concentration duct 18 is provided so as to face the air nozzle. Therefore, as shown by the arrow group 25 in the figure, the air jetted from the air nozzle is directly guided into the local concentration duct 18 and It can be effectively recovered and removed without diffusing to the surface or causing backflow. Then, the air in the indoor space where the opening of the funnel portion 21 of the local concentration duct does not face is sucked into the suction duct 10 through the gap 17 in the outer peripheral portion of the local concentration duct and exhausted as indicated by the arrow group 26. Is done.

On the other hand, to increase the effect of removing foreign matter from the container lid, it is conceivable to increase the amount of air blown from the air nozzle. However, if the amount of air injection from the air nozzle is too large, the impact on the lid is large and the lid is transported stably. In addition to being unable to do so, there is a problem that the turbulent flow of the injected air becomes intense and the removal rate decreases. According to the experiment by the present inventors, in this apparatus, the injection efficiency of foreign matter is high when the air pressure is 1 kg / cm ² , and the removal efficiency is not improved even if the injection pressure is increased further. Further, if the suction amount of the dust collector is made larger than the injection amount of the air nozzle in order to effectively collect the injected air flow, the chamber has a negative pressure and the container lid cannot be stably conveyed. In order to solve the problem, in the present embodiment, the rear side wall 7 where the air nozzle 12 is disposed is opened and the filter 9 is provided to form the air intake 8 so that the outside air can be taken in. Thereby, the suction amount of the dust collector can be increased more than the supply amount from the air supply pipe 11, and the amount of air passing between the lids can be increased without causing turbulent flow, which is effective without impairing the stable conveyance of the lids. Thus, foreign matter can be removed.

  Further, when the air nozzle spray angle with respect to the transported lid is provided in parallel with the lid as shown in FIG. 1, the lid transported while rotating passes through the nozzle position, so that the entire outer peripheral surface of the chuck wall is moved. Since the air is directly injected and passes as a parallel flow, the lower surface of the lid panel portion can also effectively remove foreign matters on the inner surface of the lid. However, in the case of a lid with a deep chuck wall, for example, if foreign matter adheres to the groove portion 32 at the lower end of the seaming wall of the lid, it may be difficult to remove by parallel flow, so as shown in FIG. If the air nozzle 12 is provided so as to be near the end of the panel on the opposite side of the lid surface, air can be directly injected into the concave upper surface 31 of the lid panel or the groove 32 at the lower end of the seaming wall. This is desirable because foreign substances adhering thereto can be effectively removed. However, if the inclination angle θ is too large, the effect of removing the foreign matter on the back side of the lid is reduced, so that it depends on the lid diameter and the lid feed pitch, but as shown in FIG. An angle range of 0 to 30 ° is desirable so that it does not hit the bottom of the upper lid 30a and hits the opposite end of the lower lid 30b.

  3 and 4 show another foreign substance removal according to the present invention. Configurations similar to those of the present embodiment and the above-described embodiment are denoted by the same reference numerals, and only differences will be described. In the foreign matter removing apparatus of the present embodiment, the foreign matter removing chamber 41 is formed by shortening the front wall 42 and the rear wall 43, opening the left side wall as a whole, and opening the left side wall. A suction duct 45 having a funnel portion 44 formed in a shape is connected. Moreover, in this embodiment, the apparatus was simplified so that it may be directly sucked into the suction duct without providing a local concentration duct.

  As mentioned above, although embodiment of the foreign material removal apparatus of the container lid of this invention was shown, this invention is not limited to the said embodiment. In each of the above embodiments, the foreign substance removal chamber and the suction duct are configured separately, but may be configured integrally. In the above-described embodiment, the side wall on the opposite side to the air nozzle of the foreign substance removal chamber is opened and the funnel portion of the suction duct is connected to the outside, but the foreign substance removal chamber is formed in a completely rectangular shape and is opposite to the air nozzle. A suction duct having a funnel portion which is formed with an opening having a predetermined width at a central portion in the depth direction of the side wall of the side wall and is tapered in the vertical direction in the opening portion and narrower than the side wall in the depth direction. A guide plate may be arranged in a tip-shaped manner connected to the entrance of the funnel portion in the foreign substance removal chamber.

Using the container lid foreign matter removing apparatus shown in FIG. 1, the following experiment was conducted to confirm the foreign matter removal status. As a sample, a set of 10 can lids each having 60 pieces of aluminum powder adhered to the front and back surfaces, put into a set of upstream chutes, removed with the downstream chutes, The number of remaining foreign objects was counted. The air injection conditions from the air nozzle at that time were set to an injection pressure of 1.0 kg / cm ² , a total injection amount of 1000 L / min, and a suction duct suction amount of 6000 L / min. As a result, as shown in Table 2, there was no aluminum powder remaining on the back surface, and only one sheet of aluminum powder was observed on the back surface. It was confirmed that the apparatus of the present invention is effective by removing the aluminum powder, which is a foreign substance that is difficult to remove completely, because the powder has been removed.

In addition, an experiment was performed with the apparatus shown in FIGS. The results are shown in Table 3. As a result, it was confirmed that the apparatus shown in FIGS. 3 and 4 was almost removed although the removal rate was lower than that in Example 1. From the above results, it is most effective to provide a local concentrated duct. However, in Example 2, the removal rate is higher than that of the comparative example shown in Table 1, and a large amount of foreign matter adheres to the lid as in the experiment. Since it is not usually done, it has been confirmed that it can withstand practical use.

  The present invention can be used not only as a foreign matter removing device for a can lid supplied to a seamer but also as a foreign matter removing device for a metal lid / synthetic resin lid supplied to a capper.

It is front sectional drawing of the foreign material removal apparatus of the lid | cover which concerns on embodiment of this invention. It is an AA cross-sectional arrow view of FIG. It is front sectional drawing of the foreign material removal apparatus of the lid | cover which concerns on other embodiment of this invention. It is a BB cross-sectional arrow view of FIG. It is explanatory drawing which shows an injection nozzle arrangement | positioning angle. It is front sectional drawing of the foreign material removal apparatus which concerns on a comparative example. It is CC sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw 2 Upstream side chute 3 Downstream side chute 6, 41 Foreign substance removal chamber 8 Outside air intake 9 Filter 10 Suction duct 11 Air supply pipe 12 Air nozzle 13 Inlet part 14 Piping part 18 Local concentration ducts 21 and 44 Funnel part 22 Cylindrical part 30 Can lid

Claims (4)

A foreign matter removing device for removing a foreign matter from a container lid being transported, wherein a plurality of air nozzles are arranged on one side of the container lid carrying path along a carrying means for carrying the container lid with a gap therebetween, A foreign matter removal chamber is formed by surrounding a space including at least the air nozzle and the container lid conveying path facing the air nozzle in a box shape, and a suction duct is provided on the opposite side of the air nozzle across the container lid conveying path. The suction duct is arranged in communication with the foreign substance removal chamber, and the inlet portion of the suction duct is formed in a throttle shape on the downstream side. The inlet portion of the suction duct facing the air nozzle is opened in the vicinity of the container lid transporting unit and on the downstream side. An apparatus for removing foreign matter from a container lid, wherein a locally concentrated duct having a tapered shape is disposed . The foreign matter removing apparatus for a container lid according to claim 1 , wherein a filter is provided by opening a side wall of the foreign matter removing chamber on the air nozzle side to form an outside air intake. The foreign matter removal apparatus for a container lid according to claim 2 , wherein an air suction amount of the suction duct is set to be larger than an air amount supplied from the air nozzle into the foreign matter removal chamber. The said air nozzle is a foreign material removal apparatus of the container lid in any one of Claims 1-3 arrange | positioned so that a nozzle angle may be 0-30 degrees with respect to a horizontal surface.

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