JP5902855B1 - Fiber drum, fiber drum lid manufacturing method, and lid end surface resin coating apparatus - Google Patents

Abstract

[PROBLEMS] To prevent the occurrence of paper dust and make it possible to look at the countermeasures related to it with good quality and relatively easily. A fiber drum 1 includes a bottomed cylindrical body 2 having an open top, and a lid 3 that is externally fitted to the opening of the body 2. The lid 3 includes a lid body 31 and a lid body 31. And the top plate 32. The lid body 31 cuts out an annular body 201 having a predetermined length shorter than the body 2 from a roll 200 formed by laminating and bonding a large number of sheet-like base papers into a cylindrical shape, and bending the upper end thereof inward in the radial direction. It is formed by. The lower end surface of the lid body 31 is covered with the resin 4. [Selection] Figure 3

Description

  The present invention relates to a fiber drum, a fiber drum lid manufacturing method, and a resin coating device for a lid body end face.

  Conventionally, fiber drums are widely used as transport containers for industrial raw materials. This fiber drum is formed by laminating a plurality of layers of sheet-like base paper to form a cylindrical trunk body, a disk-shaped bottom plate, a cylindrical lid body, and a disk-shaped top plate in order. The bottom plate is attached to the lower end of the surface side to form the fuselage, while the top plate is attached to the upper end of the inner peripheral surface of the lid body to form the lid, and the upper end of the outer peripheral surface of these fuselage is Covered with a lid.

  By the way, as described above, the fiber drum is a combination of a cylindrical trunk body, a disk-shaped bottom plate, a cylindrical lid body, and a disk-shaped top plate formed by laminating a plurality of sheets of base paper. Therefore, the cylinder main body, the bottom plate, the lid main body, and the top plate have cut surfaces of a plurality of laminated sheet-like base papers.

  For this reason, paper dust may be generated from the cut surface. In particular, the lower end surface, which is the cut surface of the lid body, has a high possibility of coming into contact with the body when the lid is attached and detached, and when the contents are stored and taken out. There is a risk of paper dust inside.

  Incidentally, examples of the object stored in the fiber drum include a food additive enclosed in a plastic bag, for example. Even if the paper powder enters the body, the paper powder is not contained in the body. Although it falls only on the plastic bag inside, it does not enter the inside of the plastic bag, but it can be said that it does not look good.

  By the way, the applicant of the present application has applied for Patent Document 1. This Patent Document 1 describes that a protective tape is attached to the lower end cut surface of the lid body of the fiber drum.

JP 2003-40240 A

  In the above-mentioned Patent Document 1, there is a concern that when the protective tape is exposed on the outer surface of the lid body, the appearance of the lid body is deteriorated, and the work of pasting the protective tape is troublesome and troublesome. The

  By the way, since there is the following Reference 1-3 as a technique for applying a resin to the end face of a paper product that is completely different from the above-described fiber drum, the following description will be given.

  First, in Reference Document 1 (Japanese Patent Laid-Open No. 2003-39576), “A molten resin is applied to the end surface of a base paper of a paper container (copper), the base paper is rolled, and one end portion and the other end portion of the base paper are rolled. It is described that “the overlapping portion is welded”. The welding is performed by the heat of the molten resin itself (see paragraph 0016).

  Reference 2 (Japanese Patent Laid-Open No. 8-143230) describes that “both ends of a sheet roll paper tube are coated with wax and / or resin”. Examples of the coating method include a method in which a paper tube is immersed in a coating material and impregnated to dry, a method in which a coating material heated and melted is applied by cooling with a brush, and a method in which the coating material is cooled and solidified by spraying. And a method for winding and fixing a coating film (see paragraphs 0015-0017).

  Further, Reference 3 (Japanese Patent Laid-Open No. 2005-231896) discloses that “the outer peripheral surface of a paper core formed by laminating paper is constituted by paper subjected to resin impregnation treatment or glass coating treatment, It is described that both end faces of the paper core are pressed and solidified by heat and pressure.

  By the way, the above-mentioned reference document 1 is a paper container that contains liquid therein, and in manufacturing the paper container, the base paper is rolled to weld the overlapping portion of one end and the other end. In addition, a molten resin is applied to the end face of the base paper.

  In this reference 1, since the lid is not attached to the upper opening of the paper container, there is a problem that the paper powder adhering to the lid as described above enters the paper container. It can be said that there is no.

  Moreover, in the above-mentioned Reference Document 2, a sheet roll paper tube for winding a recording sheet or an ink sheet used in a recording apparatus into a roll shape is an object, and it is not a container in which something is stored. In addition, since the lids are not attached to the opening at both ends of the sheet roll paper tube, there is a problem that the paper powder adhering to the lid as described above enters the sheet roll paper tube. It can be said that there is no.

  Furthermore, the above Reference 3 is intended for a paper core for winding a sheet material such as a plastic film for a magnetic tape or a line material such as a synthetic yarn, and in a container in which some object is accommodated. In addition, since the lid is not attached to the opening at both ends of the paper core, there is a problem that the paper powder adhering to the lid as described above enters the paper core. It can be said that it will not happen.

  In such References 1-3, in order to prevent the paper powder adhering to the lid as described above from entering the paper container, the cut end surface of the lid is provided as in the present invention. There is no description or suggestion of the technical idea of wrapping and hardening with resin.

  For these reasons, the above-mentioned references 1, 2, and 3 are completely different from the present invention in terms of the subject of the invention and the problem to be solved. It is only an introduction.

  In view of such circumstances, the present invention provides a fiber drum, a method for manufacturing a cover of a fiber drum, and a cover for the fiber drum, in which the generation of paper dust is prevented and the countermeasures related thereto can be performed with good appearance and relatively easily. It aims at providing the resin coating device of a body end surface.

The present invention is a fiber drum including a bottomed cylindrical body having an open upper part and a lid body that is externally fitted to the opening of the body. The lid body includes a lid body and a top plate. The lid body is composed of a number of sheet-like base papers laminated and bonded, the lower end surface is a cut-out surface, and is formed of an annular body having a predetermined length shorter than the body and has a diameter at the upper end. It has a bent portion in the inward, only the lower end surface of the lid body is covered with a resin, and characterized in that.

In this configuration, even if paper dust adheres to the lower end surface before the resin covering process only on the lower end surface that is a cut surface in the lid body of the lid body, the lower end surface is covered with the resin. Therefore, fluffing can be prevented and paper powder can be prevented from falling from the lower end surface.

  As a result, if the food additive or the like enclosed in the plastic bag is stored in the fiber drum according to the present invention and transported to an appropriate place, the lower body of the lid body of the lid body is opened when the lid body is opened. It becomes possible to prevent paper dust from falling on the plastic bag from the end face.

  And since the resin is not conspicuous unlike the protective tape as in the conventional example, the appearance of the lid is improved, and the resin coating operation is easier than the protective tape attaching operation of the conventional example. Become.

Incidentally, the top plate is a one that is attached to the upper opening of the lid body, in which is adhered to the bent portion in a state where the bent portions are overlapped so as to sandwich from both sides in the thickness direction of the lid body The inner paper includes a paper and an outer paper, and the inner paper is formed by cutting a plate formed by laminating and bonding a large number of sheet-like base papers into a circular shape or a rectangular shape. Can be coated with a resin.

  In this configuration, even if paper dust adheres to the outer peripheral end surface before the resin is coated on the outer peripheral end surface of the middle sheet of the lid, the outer peripheral end surface is covered with the resin and exposed. Therefore, fluffing is prevented and paper dust can be prevented from falling from the outer peripheral end face.

  As a result, the outer periphery of the inner paper of the lid when the lid is opened after the food additive and the like enclosed in the plastic bag is stored in the fiber drum according to the present invention and transported to an appropriate place. It becomes possible to prevent paper dust from falling on the plastic bag from the end face.

  By the way, the resin can be made of the same material as the resin used when laminating and bonding the sheet-like base paper.

  In this configuration, the resin becomes easily compatible with the adhesive resin in the coating process of the resin for coating. As a result, the coating resin is unlikely to sag on the outer surface of the lid body, and hence the outer surface of the lid body is less likely to be stained with the coating resin.

  Further, the method for producing a fiber drum lid according to the present invention includes a step of cutting an annular body having a predetermined length shorter than the body from a roll formed by laminating and bonding a large number of sheet-like base papers into a cylindrical shape. And forming a lid body by bending one end (upper end) of the cut annular body in the central axis direction radially inward, and sandwiching the bent portion of the lid body from both sides in the thickness direction. In the step of covering the lid main body with a resin, the step of overlaying and bonding the inner paper and the outer paper, and the step of coating the lower end surface of the lid main body opposite to the bent portion with a resin. The lid body is rotated with its lower end surface facing upward, and the resin having a fluidity is applied to the lower end surface of the lid body so as to hang down while thinly leveling the resin. Nature It is in the form to be 燥 is characterized by.

  In this configuration, the resin having the fluidity can be applied over a wide area of the lower end surface of the lid main body without being too much or too little. As a result, the resin is less likely to sag on the outer surface of the lid body, so that the outer surface of the lid body is less likely to be stained by the coating resin.

  Further, the method for producing a fiber drum lid according to the present invention includes a step of cutting an annular body having a predetermined length shorter than the body from a roll formed by laminating and bonding a large number of sheet-like base papers into a cylindrical shape. And a step of forming a lid body by bending one end (upper end) of the cut annular body in the central axis direction inward in the radial direction, and a plate formed by laminating and bonding a large number of sheet-like base papers. Or forming the inner paper by cutting it into a rectangle, attaching the inner paper and the outer paper so as to sandwich the bent portion of the lid body from both sides in the thickness direction, and the lid Covering the lower end surface of the main body opposite to the bent portion and the outer peripheral end surface of the inner paper with a resin, and in the resin covering step for the lid main body, The resin is thinly leveled and naturally dried while applying the resin in a fluid state on the lower end surface of the lid body while hanging on the lower end surface of the lid body. In the resin coating process on paper, the lid main body is rotated with its lower end face upward, and a resin having fluidity is applied to the outer peripheral end face of the inner paper adhered to the lid main body. It is characterized by being naturally dried.

  In this configuration, the resin having the fluidity can be applied to the lower end surface of the lid body and the outer peripheral end surface of the inner paper in a state where there is neither too much nor too little resin. As a result, the resin is unlikely to sag on the outer surface of the lid main body and the inner paper, so that the outer surface of the lid main body and the inner paper is less likely to be stained by the coating resin.

  Further, since the lower end surface of the lid main body and the outer peripheral end surface of the inner paper are covered with resin and are not exposed, fluffing can be prevented and paper powder can be prevented from falling from the lower end surface and the outer peripheral end surface. It becomes like this.

  Furthermore, the resin coating device for the lid end surface of the fiber drum according to the present invention comprises a turntable that holds the lid body with its lower end face upward, a drive unit that rotates the turntable in one direction, A coating unit for applying a fluid resin on the lower end surface of the lid main body rotated by the drive unit; and a scraper for thinning the resin applied on the lower end surface. It is a feature.

  With this configuration, the resin having the fluidity can be applied to the lower end surface of the lid body and the outer peripheral end surface of the inner paper in a state where there is neither too much nor too little resin. As a result, the resin is unlikely to sag on the outer surface of the lid main body or the inner paper, so that the outer surface of the lid main body or the inner paper is less likely to be stained by the coating resin.

  By the way, the application unit has a nozzle that applies the resin having the fluidity on the lower end surface that is directed upward in the lid main body so as to hang from the upper side, and the fluidity in the nozzle. A supply source for supplying resin; a height adjusting means for displacing the nozzle in the vertical direction following the vertical deflection of the lower end surface at a predetermined circumferential position associated with rotation of the lid body; and the lid body And a damper that displaces the nozzle in the horizontal direction following the radial deflection of the lower end surface at a predetermined circumferential position with rotation of the nozzle.

  In this configuration, for example, a resin having fluidity can be applied on the lower end surface in a relatively small amount.

  By the way, the scraper is made up of blocks that are spaced apart and arranged on the lower end surface of the lid body, and the lower surface thereof is provided with a guide groove that is recessed upward along the rotational direction of the lower end surface, The guide groove is fitted to the lower end side of the lid main body so as to form predetermined gaps between the lower end surface, the outer surface, and the inner surface, and resin applied on the lower end surface is applied to the lower end surface. It can be thinned and leveled on the lower end surface while gathering in the gap between them.

  In this configuration, the resin applied to the lower end surface of the lid body is thin and easy to level while being a relatively simple configuration.

  By the way, the groove bottom surface of the guide groove is a slope that gradually decreases the gap between the lower end surface of the lid body from the upstream side to the downstream side in the rotation direction, and the groove outer surface of the guide groove Further, the groove inner side surface may be a slope that gradually increases the width dimension of the guide groove from the groove bottom surface side toward the opening side.

  In this configuration, the guide groove of the scraper can be easily fitted to the lower end side of the lid main body, and the resin applied to the lower end surface of the lid main body can be easily thinned and leveled.

  By the way, a vertical hole into which the nozzle is inserted may be provided at a midway position in the longitudinal direction of the guide groove so as to penetrate from the upper surface of the scraper toward the groove bottom surface of the guide groove.

  In this configuration, resin can be stably applied to the lower end surface of the lid body, for example, the opposed position of the nozzle and the scraper to the lower end surface of the rotated lid body can be kept constant. It becomes possible.

  According to the present invention, there are provided a fiber drum, a fiber drum lid manufacturing method, and a resin coating device for a lid body end face, which can prevent the occurrence of paper dust and can have a good and relatively simple countermeasure. can do.

1 is a perspective view showing an overall appearance of an embodiment of a fiber drum according to the present invention. It is a perspective view which shows the state which removed the cover body of the fiber drum of FIG. It is the figure which made the cross section the fitting part of the cover body with respect to the trunk | drum of FIG. It is a figure for demonstrating the initial stage of the manufacturing method of the cover body of the fiber drum of FIGS. It is a figure for demonstrating the process following FIG. It is a figure for demonstrating the process following FIG. It is a top view for demonstrating the structure of the resin coating device of the cover body end surface of the fiber drum shown in FIG. It is a side view of the resin coating apparatus of FIG. It is a figure which expands and shows the coating unit of the resin coating apparatus of FIG. FIG. 10 is a cross-sectional view taken along line (10)-(10) in FIG. 9. It is a figure for demonstrating the resin application | coating form with respect to the outer peripheral end surface of the middle paper by the resin application | coating apparatus of FIG. It is a figure for demonstrating other embodiment of the resin application | coating form of the cover body end surface of the fiber drum which concerns on this invention. It is a figure for demonstrating other embodiment of the resin application | coating form of the cover body end surface of the fiber drum which concerns on this invention.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  1 to 10 show an embodiment of the present invention. In the figure, 1 indicates the entire fiber drum.

  The fiber drum 1 includes a bottomed cylindrical body 2 having an open top, and a lid 3 that is detachably fitted to the opening of the body 2.

  The body 2 has a configuration in which a bottom plate 22 is attached to the body main body 21.

  The body main body 21 is formed by laminating and bonding a large number of sheet-like base papers and cutting them into a circular body having a predetermined length from a roll formed into a cylindrical shape (or a rectangular tube shape).

  The bottom plate 22 is attached to the lower opening of the trunk main body 21 and is formed by cutting out a circular (or rectangular) shape from a plate formed by laminating and bonding a large number of sheet-like base papers.

  The lower end of the trunk body 21 in the central axial direction is bent at a right angle inward in the radial direction, and the bottom plate 22 is attached to the bent portion 21a.

  In addition, a curling portion 21 b that is curled inward is provided on the upper opening edge of the trunk body 21.

  Further, a reinforcing band 23 is bonded to a position near the upper opening on the outer peripheral surface of the trunk body 21. The reinforcing band 23 is formed by laminating and adhering a large number of sheet-like base papers and cutting them into a circular body having a predetermined length from a roll formed into a cylindrical shape (cylindrical shape or rectangular tube shape). The inner diameter dimension corresponding to the outer diameter dimension is formed.

  The lid 3 has a configuration in which a top plate 32 is attached to the lid body 31.

  The lid main body 31 cuts out an annular body having a predetermined length shorter than the body 2 from a roll formed by laminating and bonding a large number of sheet-like base papers into a cylindrical shape (or a rectangular tube shape), and has one end in the central axis direction thereof It is formed by bending (upper end) radially inward at a right angle.

  The top plate 32 includes a middle paper 32 a and an outer paper 32 b and is attached to the upper opening of the lid body 31. The intermediate paper 32a and the outer paper 32b are formed by cutting out a circular (or rectangular) shape from a plate formed by laminating and bonding a large number of sheet-like base papers. The lid body 3 is formed by overlapping the 31 bent portions 31a so as to be sandwiched from above and below and adhering them with an adhesive resin.

  Here, the lower end of the lid main body 31 of the lid 3 is set so as to abut on the upper end of the reinforcing band 23 of the body 2. In this state, the inner surface of the top plate 32 is set so as not to contact the curling portion 21 b at the upper end of the trunk body 21.

  In the lid main body 31, the lower end surface 31 b opposite to the bent portion 31 a and the outer peripheral end surface 32 c of the inner paper 32 a are covered with the resin 4.

  In this embodiment, the resin 4 is made of the same material as the resin used when laminating and bonding sheet-like base papers.

  As this resin 4, for example, an adhesive called vinyl acetate emulsion resin is preferable. The vinyl acetate emulsion resin is a resin in a state where a compound of acetic acid and vinyl alcohol is in a dispersion solution. In addition, the resin 4 can be a natural resin or a synthetic resin that is solidified later in a fluid state.

  As described above, according to the fiber drum 1 of the embodiment to which the present invention is applied, the lower end surface 31b before the resin 4 is coated on the lower end surface 31b serving as a cut surface in the lid main body 31 of the lid 3. Even if paper dust adheres to the lower end surface 31b, the lower end surface 31b is covered with the resin 4 and is not exposed, so that fluffing can be prevented and paper powder can be prevented from falling from the lower end surface 31b. Become.

  Thereby, if the food additive etc. which were enclosed with the plastic bag were accommodated in the fiber drum 1 of this embodiment, and it conveyed to an appropriate place, the lid body 31 of the said lid body 3 will be opened when the lid body 3 is opened. It is possible to prevent paper dust from falling onto the plastic bag in the body 2 from the lower end surface 31b.

  And since the said resin 4 is not conspicuous unlike the protective tape like a prior art example, while the appearance of the cover body 3 becomes good, the coating | coated operation | work of the said resin 4 is compared with the sticking operation | work of the protective tape of a prior art example. It will be easy.

  Next, a method for manufacturing the body 2 of the fiber drum 1 will be described.

  First, a large number of sheet-like base papers are laminated and bonded, and an annular body having a predetermined length is cut out from a roll formed into a cylindrical shape (or a rectangular tube shape), and a bent portion 21a is formed by bending its lower end radially inward. The body body 21 is formed by inserting the bottom plate 22 into the lower opening of the annular body and attaching the bottom plate 22 to the upper side of the bent portion 21a. And the fuselage | body 2 is formed by apply | coating an adhesive agent to the setting position of the outer peripheral surface of the trunk | drum main body 21, and inserting and sticking the reinforcement band 23 there.

  Next, a method for manufacturing the lid 3 of the fiber drum 1 will be described.

  First, as shown in FIG. 4, an annular body 201 having a predetermined length is cut out from a roll 200 formed by laminating and bonding a large number of sheet-like base papers into a cylindrical shape (or a rectangular tube shape).

  The lid body 31 is formed by bending one end (upper end) of the cut-out annular body 201 in the central axis direction inward in the radial direction as shown in FIG.

  On the other hand, an intermediate sheet 32a of the top plate 32 is formed by cutting a plate formed by laminating and bonding a large number of sheet-like base papers into a circle (or a rectangle). Since paper dust adheres to the intermediate paper 32a at the time of cutting, the paper dust is removed by air blowing, and then the outer peripheral end surface 32c is applied to the outer peripheral end surface 32c of the intermediate paper 32a by applying the resin 4 to the outer peripheral end surface 32c. Cover with.

  Thereafter, as shown in FIG. 6, the inner paper 32a and the outer paper 32b are overlapped with an adhesive so as to sandwich the bent portion 31a of the lid main body 31 from both sides in the thickness direction. The lid 3 is formed by sticking the bent portion 31a, the inner paper 32a, and the outer paper 32b of the lid main body 31 by heating and pressurizing the adhesive.

  And in each said process, since paper dust adheres to each part of the cover 3, after removing this paper dust by air blowing, it is resin in the lower end surface 31b on the opposite side to the bending part 31a in the lid body 31. 4 is applied to cover the lower end surface 31 b with the resin 4.

  Next, when the resin 4 is applied to the lower end surface 31b of the lid body 31, a resin application device 5 as shown in FIGS. 7 to 10 is used.

  The configuration of the resin coating device 5 will be described. The resin coating device 5 includes a base block 6, a turntable 7, a drive unit 8, a coating unit 9, a scraper 10, and the like.

  The turntable 7 is a circular table that is rotatably supported by the base block 6, and a mounting target such as the lid 3 is mounted on the upper surface thereof. In the base block 6, guide rollers 84 a and 84 b and a pressing member 83 are attached to the outer peripheral side of the turntable 7.

  The guide rollers 84a and 84b position the center of the mounting target such as the lid 3 mounted on the turntable 7 to the center of the turntable 7, and are rotatably supported by the arms 85a and 85b. The pressing member 83 immovably holds the lid 3 mounted on the turntable 7, and can be moved up and down via an elevating mechanism 86 (not shown in detail). The arms 85a and 85b are configured to be movable back and forth according to the size of the outer dimensions of the lid 3 and the like mounted on the turntable 7.

  When the resin application target such as the lid 3 is mounted on the turntable 7, the lid 3 is slid on the turntable 7 from the lateral direction so as to press the outer peripheral surface of the lid 3 against the guide rollers 84 a and 84 b. The lid 3 is fixedly supported on the turntable 7 by lowering the pressing member 83 and pressing the top plate 32 of the lid 3 from above with the pressing member 83. Note that the mounting posture of the lid 3 on the turntable 7 is such that the lower end surface 31b of the lid main body 31 faces upward.

  The drive unit 8 rotates the turntable 7 in one direction, and includes a motor 81, a speed reducer 82, and the like.

  The motor 81 generates rotational power. The reducer 82 decelerates and outputs the rotational power generated by the motor 81. The output shaft (not shown) of the speed reducer 82 is fixed at the center position on the lower surface of the turntable 7.

  The application unit 9 applies the resin 4 to the lower end surface 31 b of the lid body 31 on the turntable 7 that is rotated by the drive unit 8. The application unit 9 includes a nozzle 91, a supply source 92, a height adjusting unit 93, and a damper 94. Etc.

  The coating unit 9 according to this embodiment is configured so that the resin 4 is dropped from the nozzle 91 on the lower end surface 31b of the lid body 31 mounted upward on the turntable 7 while being thinly coated. ing.

  The nozzle 91 is applied by dripping the resin 4 having the fluidity from above the lower end surface 31b arranged upward in the lid main body 31, and the resin discharge amount can be appropriately adjusted. ing.

  The supply source 92 includes a tank 92 a for storing the resin 4 in the fluid state, a hose (not shown) for supplying the resin 4 in the fluid state from the tank 92 a to the nozzle 91, and the like. .

  The height adjusting means 93 displaces the nozzle 91 in the vertical direction following the vertical movement (center axis direction) of the lower end surface 31b at a predetermined circumferential position as the lid body 31 rotates. The sensor 93a that detects the shake and the actuator 93b that raises or lowers the nozzle 91 according to the detection result of the sensor 93a are included.

  As the sensor 93a, for example, a photo interrupter is used. Incidentally, although not shown in the figure, this photo interrupter has a large number of light emitting elements (for example, laser diodes) arranged in the vertical direction, and the same number of light receiving elements as the light emitting elements are arranged in the vertical direction at a position facing it. It is a configuration.

  In the first place, the lower end surface 31b of the lid body 31 may be slightly wavy in the circumferential direction depending on the cutout accuracy when the lid body 31 is manufactured. As a result, when the lid body 31 is rotated, the lower end surface 31b swings in the vertical direction at a predetermined circumferential position. Depending on the amount of the shake, the number of the laser beams emitted from the light emitting elements in the lateral direction is changed. Therefore, the amount of shake can be detected by examining how many laser beams are blocked from below.

  The actuator 93b includes a motor and a feed screw mechanism not shown in detail, and the nozzle 91 is fixed to the lower end of the screw shaft 93c of the actuator 93b via a support member 93d. It has become.

  The damper 94 automatically displaces the nozzle 91 in the horizontal direction following the radial deflection of the lower end surface 31b at a predetermined circumferential position accompanying the rotation of the lid body 31, and is shown in detail. Although not provided, a pneumatic or hydraulic cylinder 94a fixed to the base block 6, a slide table 94b fixed to a plunger (reference numeral omitted) of the cylinder 94a, and a damper roller 94c provided on the tip side of the slide table 94b Is included.

  The height adjusting means 93 is fixed to the upper surface of the slide table 94b, and the cylinder 94a elastically biases the slide table 94b toward the center side of the turntable 7. As a result, when the lower end surface 31b at a predetermined circumferential position with the rotation of the lid body 31 swings in the radial direction, the damper 94 automatically moves the slide table 94b forward and backward in the horizontal direction following the swing. Therefore, the nozzle 91 supported by the height adjusting means 93 mounted on the slide table 94b moves following the deflection of the lower end surface 31b, so that the nozzle 91 is radially moved to the lower end surface 31b. It will be aligned.

  The scraper 10 thins and smoothes the resin 4 applied by the application unit 9, and is a block made of a synthetic resin such as a fluorine-based resin.

  The scraper 10 is supported by the support member 93d of the height adjusting means 93 so as to be spaced and disposed above the lower end surface 31b of the lid main body 31 mounted on the turntable 7. As a result, the scraper 10 is supported in a state where the relative position is maintained integrally with the nozzle 91 via the support member 93d.

  A guide groove 101 is provided on the lower surface of the scraper 10. The guide groove 101 is recessed upward along the rotational direction of the lower end surface 31 b of the lid body 31, and between the lower end surface 31 b of the lid body 31, the outer surface, and the inner surface on the lower end side of the lid body 31. The resin 4 that is fitted so as to form a predetermined gap and is applied onto the lower end surface 31b of the lid body 31 is collected in the gap between the lower end surface 31b and the rotation direction on the lower end surface 31b. It leads to the downstream side.

  As shown in FIG. 9, the groove bottom surface of the guide groove 101 is a slope that gradually decreases the gap between the lower end surface 31 b of the lid body 31 from the upstream side to the downstream side in the rotational direction. . Further, as shown in FIG. 10, the groove outer surface and the groove inner surface of the guide groove 101 are inclined so that the width dimension of the guide groove 101 gradually increases from the groove bottom surface side toward the opening side. Yes. As a result, the guide groove 101 of the scraper 10 can be easily fitted to the lower end side of the lid main body 31 so as to straddle both sides in the radial direction, and the resin 4 applied to the lower end surface 31b of the lid main body 31 can be easily made thin. .

  A longitudinal hole 102 into which the nozzle 91 is inserted is provided in the middle of the guide groove 101 in the longitudinal direction, as shown in FIG. The vertical hole 102 is provided so as to penetrate from the upper surface of the scraper 10 toward the groove bottom surface of the guide groove 101. This makes it possible to keep the nozzle 91 and the scraper 10 opposed to the lower end surface 31b of the lid body 31 to be rotated, for example, so that the resin is stably applied to the lower end surface 31b of the lid body 31. It will be advantageous.

  A resin coating method using such a resin coating apparatus 5 will be described.

  The lid main body 31 is mounted and held on the upper surface of the turntable 7 with its lower end surface 31 b facing upward, and then the turntable 7 is rotated by the drive unit 8.

  The resin 4 applied on the lower end surface 31b is thinly leveled by the scraper 10 while the resin 4 is applied to the lower end surface 31b of the lid body 31 so as to hang down from the nozzle 91. As a result, the resin 4 penetrates between the multiple layers of sheet-like base paper constituting the lid main body 31 from the lower end surface 31b and covers the lower end surface 31b, and is solidified by natural drying. In this embodiment, since the resin 4 is thinly leveled as described above, it is naturally dried in a short time.

  According to the resin coating method and the resin coating apparatus 5 as described above, the coating operation of the resin 4 becomes simpler than the conventional tape attaching operation, and the wide area of the lower end surface 31b of the lid body 31 is increased. In addition, the resin 4 having the fluidity can be applied without being too much or too little.

  Accordingly, the resin 4 applied to the lower end surface 31b of the lid main body 31 is less likely to sag from the lower end surface 31b to the outer peripheral surface or inner peripheral surface in the vicinity thereof, so that the outer surface (outer peripheral surface or inner peripheral surface of the lid main body 31 is reduced. ), The appearance of the lid body 31 is improved.

  In addition, this invention is not limited only to the said embodiment, It can change suitably in the range equivalent to the claim and the said range.

  (1) In the embodiment described above, the resin 4 is applied to the lower end surface 31b of the lid body 31 so as to hang down. However, the present invention is not limited to this and is illustrated. However, for example, it is possible to use a mist spray.

  (2) In the above embodiment, the case where the outer peripheral end surface 32c is coated with the resin 4 in the state of the single intermediate paper 32a is taken as an example, but the present invention is not limited to this. It is possible to cover the outer peripheral end surface 32 c of the intermediate paper 32 a with the resin 4 after the 32 a is attached to the lid main body 31.

  A method for manufacturing the lid 3 of the fiber drum 1 in that case will be described.

  First, as shown in FIG. 4, an annular body 201 having a predetermined length is cut out from a roll 200 formed by laminating and bonding a large number of sheet-like base papers into a cylindrical shape (or a rectangular tube shape).

  The lid body 31 is formed by bending one end (upper end) of the cut-out annular body 201 in the central axis direction inward in the radial direction as shown in FIG.

  On the other hand, an intermediate sheet 32a of the top plate 32 is formed by cutting a plate formed by laminating and bonding a large number of sheet-like base papers into a circle (or a rectangle). Since paper dust adheres to the intermediate paper 32a at the time of cutting, the paper dust is removed by air blowing.

  Thereafter, as shown in FIG. 6, the inner paper 32a and the outer paper 32b are overlapped with an adhesive so as to sandwich the bent portion 31a of the lid main body 31 from both sides in the thickness direction. The lid 3 is formed by sticking the bent portion 31a, the inner paper 32a, and the outer paper 32b of the lid main body 31 by heating and pressurizing the adhesive.

  And in each process, since paper dust adheres to each part of the lid 3, after removing this paper dust by air blowing, the resin 4 is applied to the lower end surface 31b on the opposite side of the bent portion 31a in the lid body 31. The lower end surface 31b is coated with the resin 4 by application, and the outer peripheral end surface 32c is coated with the resin 4 by applying resin to the outer peripheral end surface 32c of the intermediate paper 32a.

  Here, the method of coating the lower end surface 31b of the lid main body 31 with the resin 4 is performed by using the resin coating apparatus 5 shown in FIGS. 7 to 10 as in the above embodiment. For example, as shown in FIG. 11, the end surface 32 c is covered with the resin 4 from the second nozzle 95 in an obliquely outward posture on the inner corner of the lid body 31 arranged upward, that is, the outer peripheral end surface 32 c of the intermediate paper 32 a. It is conceivable to apply the resin 4 in a fluid state by spraying it in the form of a mist.

  The second nozzle 95 in the obliquely outward posture can be additionally provided in the resin coating device 5. In that case, although not shown, the same thing as the above-mentioned height adjusting means 93 and the damper 94 should be equipped in order to individually adjust the position of the second nozzle 95 in the vertical direction and the radial direction. Is preferred.

  In addition to this, as a method of coating the outer peripheral end surface 32 c of the intermediate paper 32 a with the resin 4, it is possible to apply using the resin application device 5.

  Specifically, when the resin is applied to the outer peripheral end surface 32c of the intermediate paper 32a in the same manner as in the above embodiment, the nozzle 91 and the scraper 10 are disposed in a sideways posture, for example, as shown in FIG. In a state where the intermediate paper 32a is positioned and mounted on the turntable 7, while applying the resin 4 to be discharged from the nozzle 91 in the lateral orientation to the outer peripheral end surface 32c of the intermediate paper 32a, the resin 4 is thinly averaged by the scraper 10. I can do it.

  As another form, for example, as shown in FIG. 13, for example, the central axis of the intermediate paper 32 a is arranged along the horizontal direction, and the intermediate paper 32 a is rotated around the central axis serving as the horizontal axis. It is possible to apply the resin 4 so as to hang down from the nozzle 91 at the uppermost position of the inner paper 32a and to make it thin with the scraper 10.

  (3) In the above embodiment, the inner peripheral surface of the trunk body 21, the inner surface of the bottom plate 22, the inner and outer peripheral surfaces of the lid main body 31, the inner surface of the intermediate paper 32a, the outer surface of the outer paper 32b, and the like are waterproofed. Is also possible.

  As this waterproofing process, a waterproof sheet, for example, a laminate film can be applied. This laminate film is formed, for example, by laminating an arbitrary film on a low density polyethylene film. The said arbitrary film should just increase the intensity | strength of the said laminate film, For example, a polyethylene-vinyl acetate copolymer film etc. can be mentioned. In the laminate film having such a configuration, it is preferable that the low-density polyethylene film is stuck to the sticking target side.

  Moreover, as said waterproofing process, it is also possible to make it the form which applies a water-resistant coating material to a process target surface, and improves water resistance.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a fiber drum, a method for manufacturing a fiber drum lid, and a resin coating device for a lid end surface.

1 Fiber drum 2 Body 3 Lid 31 Lid body
31a Bending part
31b Lower end surface 32 Top plate
32a Medium paper
32b Outer paper
32c Outer peripheral end surface of middle paper 4 Resin 5 Resin coating device 200 Roll 201 Annular

Claims (10)

A fiber drum including a bottomed cylindrical body having an open top, and a lid that is externally fitted to the opening of the body,
The lid includes a lid body and a top plate,
The lid body is composed of a large number of sheet-like base papers laminated and bonded, the lower end surface is a cut-out surface, and is formed of an annular body having a predetermined length shorter than the body, and the upper end is radially inward. It has a bent part of the direction,
A fiber drum, wherein only the lower end surface of the lid body is coated with a resin. The fiber drum according to claim 1, wherein
The top plate, there is attached to the upper opening of the lid body, paper and in the bent portion of the lid body is adhered to the bent portion in a state superimposed so as to sandwich from both sides in the thickness direction Including outer paper,
The inner paper is formed by cutting a plate formed by laminating and bonding a large number of sheet-like base papers into a circle or a rectangle,
A fiber drum characterized in that an outer peripheral end surface serving as a cut surface of the inner paper is coated with a resin. The fiber drum according to claim 1 or 2,
The fiber drum is characterized in that the resin is made of the same material as that used for laminating and bonding the sheet-like base paper. A method for producing a lid of a fiber drum according to claim 1 or 3,
A step of cutting an annular body having a predetermined length shorter than the body from a roll formed by laminating and bonding a large number of sheet-like base papers into a cylindrical shape;
Forming a lid body by bending one end (upper end) of the cut annular body in the central axis direction radially inward;
A step of superposing and bonding the inner paper and the outer paper so as to sandwich the bent portion of the lid body from both sides in the thickness direction;
Covering the lower end surface of the lid body opposite to the bent portion with a resin,
In the resin coating process on the lid body, the lid body is rotated with its lower end surface facing upward, and the resin having fluidity is applied to the lower end surface of the lid body so as to hang down. However, the method for producing a lid of a fiber drum is characterized in that the resin is thinly and uniformly dried. A method for manufacturing a fiber drum lid according to claim 2 or 3,
A step of cutting an annular body having a predetermined length shorter than the body from a roll formed by laminating and bonding a large number of sheet-like base papers into a cylindrical shape;
Forming a lid body by bending one end (upper end) of the cut annular body in the central axis direction radially inward;
Forming the inner paper by cutting out a circular or rectangular shape from a plate formed by laminating and bonding a large number of sheet-like base papers;
A step of superposing and bonding the inner paper and the outer paper so as to sandwich the bent portion of the lid body from both sides in the thickness direction;
Covering the lower end surface of the lid body opposite to the bent portion and the outer peripheral end surface of the inner paper with a resin,
In the resin coating process on the lid body, the lid body is rotated with its lower end surface facing upward, and the resin having fluidity is applied to the lower end surface of the lid body so as to hang down. While, the resin is thinly and evenly air dried,
In the resin coating process on the inner paper, the lid body is rotated with its lower end face upward, and the outer peripheral end surface of the inner paper that is bonded to the lid body has fluidity in the resin state. A method for manufacturing a lid of a fiber drum, wherein the coating is naturally dried. A resin coating device for the end surface of the lid of the fiber drum according to any one of claims 1 to 3,
A turntable for holding the lid body with its lower end surface facing upward;
A drive unit that rotates the turntable in one direction;
An application unit for applying a resin having fluidity on the lower end surface of the lid body rotated by the drive unit;
A scraper for thinly leveling the resin applied on the lower end surface;
A resin coating device for the end face of the lid of the fiber drum. In the resin coating apparatus of the cover body end surface of the fiber drum of Claim 6,
The application unit includes:
A nozzle for applying the resin in a state having the fluidity from above on a lower end surface which is directed upward in the lid body;
A supply source for supplying the fluid resin to the nozzle;
Height adjusting means for displacing the nozzle in the vertical direction following the vertical deflection of the lower end surface at a predetermined circumferential position with rotation of the lid body;
And a damper for horizontally displacing the nozzle following a radial deflection of the lower end surface at a predetermined circumferential position as the lid body rotates. Resin coating equipment. In the resin coating apparatus of the cover body end surface of the fiber drum of Claim 6 or 7,
The scraper is composed of blocks that are spaced apart and arranged on the lower end surface of the lid body,
On its lower surface, a guide groove that is recessed upward is provided along the rotational direction of the lower end surface,
The guide groove is fitted to the lower end side of the lid main body so as to form predetermined gaps between the lower end surface, the outer surface, and the inner surface, and resin applied on the lower end surface is applied to the lower end surface. The resin coating device for the end surface of the lid of the fiber drum is characterized in that it is thinned and smoothed on the lower end surface while being collected in a gap between them. In the resin coating apparatus of the cover body end surface of the fiber drum of Claim 8,
The groove bottom surface of the guide groove is a slope that gradually reduces the gap between the lower end surface of the lid body from the upstream side to the downstream side in the rotational direction,
The lid of the fiber drum, wherein the groove outer surface and the groove inner surface of the guide groove are inclined so that the width dimension of the guide groove gradually increases from the groove bottom side toward the opening side. Resin coating device for body edge. In the resin coating apparatus of the cover body end surface of the fiber drum of Claim 8 or 9,
A fiber drum characterized in that a longitudinal hole into which the nozzle is inserted is provided at a midway position in the longitudinal direction of the guide groove so as to penetrate from the upper surface of the scraper toward the groove bottom surface of the guide groove. Resin coating device for the lid end face.

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