JP6468935B2 - Application container - Google Patents

Description

  The present invention relates to an application container, and more particularly to an application container for applying contents such as a liquid agent.

  Conventionally, a distribution cylinder mounted on the cylindrical mouth portion of the container body, and a distal end portion disposed in the distribution cylinder in a state of being biased toward the distal end side of the container body along the axial direction thereof. An applicator plug that protrudes from the flow tube to the front end side, and an overcap that is detachably attached to the cylindrical mouth portion of the container body and covers the flow tube and the front end side of the applicator plug. There is known a coating container that hermetically seals the inside and the outside of the container body by closely contacting the sealing surface formed on the outer surface of the container and the surface to be sealed of the inner surface of the flow tube (see Patent Document 1). .

  According to the coating container described in Patent Document 1, when applying the contents, the overcap is removed, the container body is tilted so that the tip of the coating plug faces downward, and the tip of the coating plug is placed on the coated surface. The pressed contents are pushed into the flow cylinder to release the seal, and the flowed contents can be applied to the surface to be coated.

Moreover, the 1st processus | protrusion which protrudes toward the front end side is provided in the front-end | tip part of the coating stopper of patent document 1, and an overcap is provided in the 1st processus | protrusion along the circumferential direction of a flow pipe | tube in an overcap. The 2nd protrusion which opposes from the clamp | tightening side fastened to a cylindrical opening part is provided. In each of the first protrusion and the second protrusion, a slidable contact surface that is inclined with respect to an orthogonal surface that is orthogonal to the axis of the flow tube is formed in a portion facing each other in the circumferential direction. Since the application container of Patent Document 1 is provided with the first protrusion and the second protrusion, the overcap and the container body are relatively positioned on the loose side where the overcap is loosened from the cylindrical mouth portion of the container body. When the rotary projection is moved, the application plug can be pushed down into the distribution cylinder by pushing the first projection toward the container body with the second projection.

  For example, when contents such as liquids with relatively high volatility are stored in the container body or when the container body is exposed to high outside air temperature, the pressure inside the container body is higher than the pressure outside the container body. However, according to the application container described in Patent Document 1, when removing the overcap, the application stopper is pushed down to release the seal between the seal surface and the surface to be sealed. The internal pressure and external pressure of the container body can be equalized before the contents are applied, and the content of the container body is prevented from being ejected onto the coated surface more than intended due to the pressure difference between the inside and outside of the container body. can do.

JP 2010-52821 A

  By the way, the application plug of Patent Document 1 is integrally provided with a helical resin spring as a helical spring piece, and the overcap rotates relatively to the loose side where the overcap is loosened from the cylindrical mouth portion of the container body. When moving, the seal between the sealing surface and the surface to be sealed is released by pushing the first protrusion against the container body side by the second protrusion against the elastic force of the spiral spring piece. .

  However, depending on the winding direction of the spiral spring piece, the spring piece repels and deforms in a desired direction when the overcap is relatively rotated to the tightening side that fastens the cylindrical cap of the container body. There is a risk of not. In such a case, there is a concern that the spring performance may deteriorate due to the deterioration of the spring piece or the sealing performance between the sealing surface and the surface to be sealed.

  In view of the above problems, the object of the present invention is to make the internal pressure and the external pressure of the container main body equal when loosening the overcap from the cylindrical mouth portion of the container body, and to set the overcap to the cylindrical mouth portion of the container body. An object of the present invention is to provide an applicator container that can suppress settling and deterioration of sealing performance due to deterioration of a spring piece by deforming the spring piece in a desired direction when tightening.

  An application container according to a first aspect of the present invention includes a container main body in which contents are stored, a distribution cylinder attached to a cylindrical mouth portion of the container main body, the extension extending into the distribution cylinder, and A coating plug comprising: a distal end plug portion that protrudes from the distal end side of the flow tube; and an urging portion that biases the distal end plug portion toward the distal end side of the flow tube; and the cylindrical mouth portion And an overcap that is detachably mounted by screwing, and is formed in the flow tube at a portion located in the flow tube of the coating plug according to the position of the tip plug portion. An application container in which a sealing surface that abuts against the sealed surface from the axial base end side of the flow tube is formed, and the biasing portion is configured to connect the overcap to the cylindrical mouth portion. A spiral spring piece wound in the same direction as the rotational direction of the tightening side, Has an engaging portion that engages with the distal end plug portion in conjunction with an operation of loosening the overcap from the cylindrical mouth portion and an operation of tightening the overcap with respect to the cylindrical mouth portion. The engaging portion, when loosening the overcap from the cylindrical mouth portion, compresses and deforms the spring piece by pressing the distal end plug portion toward the axially proximal end side of the flow tube. When the distal plug is moved to the proximal end in the axial direction of the flow tube and the overcap is tightened with respect to the cylindrical mouth, the distal plug is rotated to twist the spring piece. Thus, the distal end plug portion is moved toward the axially proximal end side of the flow tube.

  As one embodiment of the present invention, the distal end surface of the distal end plug portion includes two inclined surfaces facing each other, the engagement portion engages with the two inclined surfaces, and the distal end plug portion is connected to the flow tube. It is preferable to move to the axial base end side.

  As one embodiment of the present invention, the overcap includes a peripheral wall portion having a female screw portion that can be screwed with a male screw portion formed in the cylindrical mouth portion, and a ceiling wall portion that closes a distal end side of the peripheral wall portion. The engaging part is suspended from the top wall part, and the engaging part is provided with a recess having a first slope and a second slope that engage with the two slopes. It is preferable.

  According to the present invention, when the overcap is loosened from the cylindrical mouth portion of the container body, the internal pressure and the external air pressure of the container body can be equalized, and when the overcap is tightened into the cylindrical mouth portion of the container body By deforming the piece in a desired direction, it is possible to provide an application container that can suppress settling due to deterioration of the spring piece and a decrease in sealing performance.

It is a figure which shows the application container as one Embodiment of this invention, and is a figure which shows the state in the middle of the overcap being tightened with respect to the cylindrical opening part of a container main body. It is a figure which shows the state which further tightened the overcap with respect to the cylindrical opening part of the container main body from the state shown in FIG. 1, and tightened with respect to the cylindrical opening part. 3A is an enlarged perspective view showing the vicinity of the distal end portion of the distal end plug portion in the state shown in FIG. 1, and FIG. 3B is the vicinity of the distal end portion of the distal end plug portion in the state shown in FIG. FIG. It is a figure which shows the application container as a comparative example.

  Hereinafter, an embodiment of a coating container according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure.

  1 and 2 are views showing an application container 1 as the present embodiment. As shown in FIGS. 1 and 2, the application container 1 includes a container main body 10, a distribution cylinder 20, an application stopper 30, and an overcap 40. The application container 1 in FIG. 1 shows a state where the overcap 40 is being fastened to the cylindrical mouth portion 12 of the container body 10. The application container 1 shown in FIG. 2 shows a state where the overcap 40 is further tightened into the cylindrical mouth portion 12 of the container body 10 from the state shown in FIG.

  In the example shown in FIGS. 1 and 2, the bottomed cylindrical container body 10, the distribution cylinder 20, the application plug 30, and the overcap 40 are arranged with their central axes positioned on a common axis. Has been. Hereinafter, this common axis is referred to as an axis O, and the side where the overcap 40 is located in the direction parallel to the axis O (hereinafter referred to as “axial direction”) is the upper side or the distal end side of the flow tube 20 and the coating plug 30. It describes. Moreover, the side where the container main body 10 is located in the axial direction is described as the lower side or the proximal end side of the flow tube 20 and the application plug 30.

  The container body 10 can accommodate contents such as a liquid agent therein. Specifically, the container body 10 is continuously formed on the upper side, which is one end side of the trunk portion 11, and forms the accommodation space S for accommodating the contents therein. A cylindrical mouth portion 12 that can be poured out from the outside, and a bottom portion (not shown) formed continuously on the lower side, which is the other end side of the body portion 11. The cylindrical mouth portion 12 has a male screw portion 12 a on the outer surface, and the overcap 40 has a female screw portion 41 a formed on the inner surface of the peripheral wall portion 41 of the overcap 40 and screwed with the male screw portion 12 a of the cylindrical mouth portion 12. By fitting, it is attached to the cylindrical mouth portion 12.

  The distribution cylinder 20 can be attached to the cylindrical mouth portion 12 of the container body 10 and defines a distribution hole 20a penetrating in the axial direction. In addition, a flange portion 21 is formed in the axial central portion of the outer peripheral surface of the flow tube 20 so as to form an annular shape along the circumferential direction and project outward in the radial direction. The outer diameter of the flange portion 21 is equal to the outer diameter of the cylindrical mouth portion 12 of the container body 10. In addition, the base end side cylinder portion 22 positioned below the flange portion 21 in the distribution cylinder 20 has an outer diameter that is equal to or slightly larger than the inner diameter of the cylindrical mouth portion 12 of the container body 10. It is fitted in the shaped mouth portion 12. That is, the flow tube 20 is attached to the tubular mouth portion 12 by fitting the proximal-side tubular portion 22 to the tubular mouth portion 12 so that the inside thereof communicates with the body portion 11. . In addition, an annular protrusion 22 a that forms an annular shape along the circumferential direction and protrudes inward in the radial direction is formed on the inner peripheral surface of the proximal end side cylindrical portion 22. Further, the lower surface of the flange portion 21 is in close contact with the upper end surface of the cylindrical mouth portion 12 of the container body 10.

  In the flow tube 20, the distal end side cylinder portion 23 located above the flange portion 21 has a reduced diameter portion 23 a in which the inner diameter and the outer diameter are gradually reduced from the lower side toward the upper side, and the reduced diameter portion 23 a A cylindrical portion 23b that is continuously formed on the upper side and has an inner diameter and an outer diameter that do not vary depending on the position in the axial direction, and is formed continuously with the cylindrical portion 23b so as to close the upper end of the cylindrical portion 23b. And an upper plate portion 23c that divides the central opening 24 to be configured. A sealed surface 25 with which the sealing surface 37 of the coating plug 30 abuts is formed on the inner peripheral surface at the upper end of the reduced diameter portion 23a. A plurality of ribs 26 extending in the axial direction are provided in the circumferential direction on the inner peripheral surface at the lower end of the reduced diameter portion 23a. The distribution cylinder 20 is integrally formed of a soft plastic material such as low density polyethylene, for example.

  The coating plug 30 extends along the axial direction in the flow tube 20 and protrudes from the front end side of the flow tube 20 through the central opening 24, and a base of the tip plug portion 31. A support portion 32 having a frustoconical outer shape continuously formed on the end side so that the central axis coincides with the axis O, and a base end side tube of the flow tube 20 positioned below the support portion 32 An annular protrusion 22a in the portion 22 is positioned between the support portion 32 and the base portion 33, and the distal end plug portion 31 is circulated between the cylindrical base portion 33 held undercut by the proximal end side cylindrical portion 22 And a spiral spring piece 34 as an urging portion that urges toward the distal end side of the tube 20. The distal end plug portion 31, the support portion 32, the base portion 33, and the spring piece 34 of the present embodiment are integrally formed of a soft plastic material having elasticity such as low density polyethylene, for example.

  The distal end plug portion 31 has a substantially columnar outer shape, and extends in the axial direction within the cylindrical portion 23b of the flow tube 20 as shown in FIGS. 1 and 2, and the distal end portion 31a is an upper plate. It protrudes outward from the central opening 24 formed in the portion 23c. The outer diameter of the distal end plug portion 31 is smaller than the diameter of the inner peripheral surface that defines the central opening 24, and the inner surface that defines the outer peripheral surface of the distal end plug portion 31 and the central opening 24 in the radial direction of the distal end plug portion 31. A gap is formed between the peripheral surface. Since the inner diameter of the cylindrical portion 23b is larger than the diameter of the inner peripheral surface that defines the central opening 24, in the radial direction of the distal plug portion 31, the outer peripheral surface of the distal plug portion 31 and the inner peripheral surface of the cylindrical portion 23b. A gap is also formed between the gaps.

  3A is an enlarged perspective view in which the vicinity of the distal end portion 31a of the distal end plug portion 31 shown in FIG. 1 is enlarged. FIG. 3B is an enlarged perspective view in which the vicinity of the distal end portion 31a of the distal end plug portion 31 shown in FIG. 2 is enlarged. As shown in FIGS. 1 to 3, the distal end surface 31 b of the distal end plug portion 31 is composed of two opposed inclined surfaces 35 a and 35 b and a band-shaped end surface 36 connecting the distal ends of the two inclined surfaces 35 a and 35 b. It has a sharp shape.

  Each of the two inclined surfaces 35a and 35b is a plane inclined so as to approach the axis O toward the distal end side, and the two inclined surfaces 35a and 35b are formed at positions facing each other with the axis O interposed therebetween. The distal ends of the inclined surfaces 35a and 35b are continuous with the band-shaped end surface 36, and the proximal ends of the inclined surfaces 35a and 35b are continuous with the outer peripheral surface of the distal end plug portion 31.

  The band-shaped end surface 36 is a plane orthogonal to the axial direction, and connects the two inclined surfaces 35a and 35b.

  As shown in FIGS. 1 to 3, the distal end surface 31 b of the distal end plug portion 31 has a mountain-shaped sharp shape in a side view (see FIG. 2), but is shifted by 90 degrees in the circumferential direction. In a side view of the distal end plug portion 31 viewed from the position, it has a non-sharp shape represented by a straight line orthogonal to the axial direction (see FIG. 1).

  The support part 32 is provided with a ring-shaped side wall part 32a and an upper wall part 32b continuous above the side wall part 32a. The outer peripheral surface of the side wall portion 32a is inclined so as to approach the axis O as it goes from the lower side to the upper side, and the outer peripheral surface of the side wall portion 32a, which is a portion located in the flow tube 20 of the coating plug 30, is the tip. Depending on the axial position of the plug portion 31, a seal surface 37 is formed that comes into contact with the sealed surface 25 formed in the flow tube 20 from the proximal end side in the axial direction of the flow tube 20. Moreover, the upper end part of the some spring piece 34 is continuously connected to the lower end part of the side wall part 32a. The tip plug portion 31 described above is formed continuously on the upper side of the upper wall portion 32b.

  The base portion 33 has a substantially cylindrical shape having an outer diameter larger than the maximum outer diameter of the support portion 32, and is held by an undercut in the proximal end side tubular portion 22 of the flow tube 20 by the annular protrusion 22 a. Has been. The lower end portions of the plurality of spring pieces 34 are continuously connected to the upper end portion of the base portion 33. As shown in FIGS. 1 and 2, the upper end surface of the base portion 33 is in contact with the lower end of the rib 26 of the flow tube 20 in a state of being fitted and held in the base end side tube portion 22 by undercut. It touches.

  The spiral spring piece 34 as the urging portion has an upper end connected to the support portion 32 and a lower end connected to the base portion 33. A gap is formed between the spring piece 34 and the inner peripheral surface of the flow tube 20. Further, a plurality of spring pieces 34 are provided, and the plurality of spring pieces 34 are arranged at equal intervals around the axis O which is a common axis, and in the natural state, the spring pieces 34 adjacent in the circumferential direction are provided. They are not in contact with each other. The plurality of spring pieces 34 have the same shape, and the plurality of spring pieces 34 form a cylindrical shape as a whole. Accordingly, when the distal end plug portion 31 is pushed down when the plurality of spring pieces 34 are in a natural state, the plurality of spring pieces 34 are compressed in the axial direction to generate an upward repulsive force, and the support portion 32 is interposed therebetween. Thus, the distal end plug portion 31 can be urged upward.

  Further, each of the plurality of spring pieces 34 is a left-handed winding which is wound clockwise from the lower side toward the upper side, and the support part 32 is rotated clockwise around the axis O via the distal end plug part 31. If it does, the effective length of the axial direction of the spring piece 34 can be shortened rather than the effective length of a natural state. More specifically, when the support portion 32 is rotated clockwise through the distal end plug portion 31, the plurality of spring pieces 34 are tightened in the direction in which they are twisted and twisted together, thereby the effective length in the axial direction. Is shortened. The base portion 33 is fitted and held on the proximal end side cylinder portion 22 so as not to rotate when the support portion 32 is rotated via the distal end plug portion 31. Further, even when the effective length in the axial direction is shortened by twisting the spring piece 34, the restoring force is generated to rotate counterclockwise to restore the natural state. To do. Therefore, when the spring piece 34 is released from a state where the effective length in the axial direction is shorter than the effective length in the natural state, the spring piece 34 tries to be restored to the natural state by the restoring force, and the effective length in the axial direction is extended. During this restoration, the distal end plug portion 31 can be pushed upward via the support portion 32. The “effective length” in the present embodiment is a length between the lower end of the support portion 32 and the upper end of the base portion 33 in the axial direction.

  In other words, the spiral spring piece 34 as the urging portion is wound in the same direction as the rotation direction (see the white arrow in FIG. 1) on the side where the overcap 40 is tightened with respect to the cylindrical mouth portion 12. ing. Details of the action of setting the winding direction of the spring piece 34 and the rotation direction of the overcap 40 to be tightened to the same direction will be described later.

  Here, although the three spring pieces 34 of this embodiment are arrange | positioned by the equal pitch in the circumferential direction, the number of the spring pieces 34 is not restricted to this number, The pitch of the axial direction in each spring piece Or, it can be appropriately changed according to the size of the diameter.

  Thus, the coating plug 30 compresses the helical spring piece 34 as the urging portion in the axial direction and the repulsive force due to this compression, and shortens the effective length in the axial direction due to the twist of the spring piece 34. By utilizing the torsional restoring force generated by the twisting, it is possible to realize an upward biasing force on the distal end plug portion 31 and a positional variation in the axial direction of the distal end plug portion 31. In addition, the spring piece 34 of the application plug 30 is axially fixed in a state where the base portion 33 is fitted and held to the proximal end side cylindrical portion 22 of the flow tube 20 by an undercut and no external force is applied to the distal end plug portion 31. It is in a slightly compressed state. Therefore, in this state, the sealing surface 37 of the support portion 32 and the sealed surface 25 in the flow cylinder 20 are in close contact with each other by the upward repulsive force of the spring piece 34, and the flow hole 20a is closed. It has become.

  The overcap 40 is detachably attached to the cylindrical mouth portion 12 of the container body 10 by screwing. Specifically, the overcap 40 includes a peripheral wall portion 41 in which a female screw portion 41 a that can be screwed with the male screw portion 12 a of the container body 10 is formed on the lower inner peripheral surface, and a top wall portion 42 that closes the upper side of the peripheral wall portion 41. A cylindrical first seal tube portion 43 which is located on the inner side of the peripheral wall portion 41 and is integrally suspended from the lower surface of the top wall portion 42, and is located on the inner side of the first seal tube portion 43, The cylindrical second seal cylinder portion 44 that is integrally suspended from the lower surface of the portion 42 and the inner wall of the second seal cylinder portion 44 and the lower surface of the top wall portion 42 are formed continuously, and the coating plug 30 described above. A plate-like engagement portion 45 that engages with the distal end surface 31 b of the distal end plug portion 31.

  The peripheral wall portion 41 is composed of a lower cylindrical portion 41b in which an internal thread portion 41a is formed on the inner surface, and an upper cylindrical portion 41c having an inner diameter smaller than that of the lower cylindrical portion 41b. The lower end of the inner surface and the upper end of the inner surface of the upper cylindrical portion 41 c are connected via a downward annular stepped portion 46.

  The overcap 40 is formed by screwing the female threaded portion 41a in the lower cylindrical portion 41b of the peripheral wall portion 41 with the male threaded portion 12a in the cylindrical mouth portion 12 of the container body 10, and forming a downward annular stepped portion 46 above the female threaded portion 41a. The cylindrical mouth portion 12 can be tightened until it comes into contact with the upper surface of the flange portion 21. That is, as shown in FIG. 2, the state where the annular step portion 46 is in contact with the upper surface of the flange portion 21 is the tightening completion position of the overcap 40.

  In the state shown in FIG. 2, the first seal cylinder portion 43 has an inner peripheral surface at the lower end thereof in close contact with an outer peripheral surface at the upper end portion of the distal end side cylinder portion 23, and seals around the outer edge of the upper plate portion 23 c. To do. Further, in the state shown in FIG. 2, the lower end of the second seal cylinder portion 44 bites into the upper surface of the upper plate portion 23 c and seals around the central opening 24. That is, in the state shown in FIG. 2, the first seal cylinder part 43 and the second seal cylinder part 44 form a concentric double seal structure. In the state shown in FIG. 2, the support portion 32 of the application plug 30 is biased upward by the plurality of spring pieces 34, and the outer peripheral surface (the seal surface 37 of the present embodiment) of the side wall portion 32 a of the support portion 32. The flow hole 20 a of the flow tube 20 is closed in close contact with the surface to be sealed 25.

  The engagement portion 45 engages with the distal end plug portion 31 in conjunction with the operation of loosening the overcap 40 from the cylindrical mouth portion 12 and the operation of tightening the overcap 40 with respect to the tubular mouth portion 12. 31 is moved to the axial direction proximal end side of the flow tube 20. Specifically, the engaging portion 45 has a flat plate shape in which the upper end is connected to the lower surface of the top wall portion 42 and both side ends are connected to the inner surface of the second seal cylinder portion 44. A triangular recess 45a is formed. The triangular recess 45a can be brought into contact with the distal end surface 31b of the distal end plug portion 31 and pressed to deform the spring piece 34 and push down the distal end plug portion 31 toward the proximal end side in the axial direction. . Thereby, the sealing surface 37 and the surface to be sealed 25 are separated from each other, and the flow hole 20a is opened.

  More specifically, when the overcap 40 is loosened from the cylindrical mouth portion 12, the engaging portion 45 presses the distal end surface 31 b of the distal end plug portion 31 toward the axially proximal end side of the flow tube 20 and the spring piece 34. By compressing and deforming, the distal end plug portion 31 can be moved to the axially proximal end side of the flow tube 20. Therefore, in the operation of removing the overcap 40 before use of the application container 1, the seal between the seal surface 37 and the surface to be sealed 25 can be released, and the internal pressure of the container body 10 is increased. In addition, the internal pressure of the container body 10 can be made equal to the external air pressure before the application container 1 is used. Details of this will be described later.

  Further, when the overcap 40 is tightened with respect to the cylindrical mouth portion 12, the engaging portion 45 presses the distal end surface 31 b of the distal end plug portion 31 in the circumferential direction, and rotates the distal end plug portion 31 to spring. By twisting and deforming the piece 34, the distal end plug portion 31 can be moved to the axially proximal end side of the flow tube 20.

  Here, FIG. 4 is a view showing an application container 100 as a comparative example. The application container 100 shown in FIG. 4 differs in the structure of the spring piece as an urging | biasing part compared with the application container 1 of this embodiment. The spring piece 110 in the application container 100 shown in FIG. 4 is wound in the same direction as the rotation direction on the side where the overcap 40 is loosened with respect to the cylindrical mouth portion 12, and is different from the spring piece 34 of this embodiment. Is in the opposite direction. In addition, the application container 100 shown in FIG. 4 is the same as the structure of the application container 1 of this embodiment except for the structure of the spring piece 110. Since the spring piece 110 of the application container 100 shown in FIG. 4 is torsionally deformed so that the spiral is released when the overcap 40 is tightened, the spring piece 110 may be repelled and not deformed in a desired direction. In such a case, there is a concern that the spring performance may deteriorate due to deterioration of the spring piece 110 or the sealing performance between the sealing surface 37 and the sealed surface 25 may be deteriorated.

  On the other hand, the spring piece 34 in the application container 1 of the present embodiment is desired to be twisted by the engaging portion 45 of the overcap 40 when the overcap 40 is tightened with respect to the cylindrical mouth portion 12. Therefore, it is possible to suppress the settling due to the deterioration of the spring piece 34 and the deterioration of the sealing performance between the seal surface 37 and the surface 25 to be sealed.

  As described above, the engaging portion 45 of the present embodiment has a flat plate shape, and a triangular recess 45a is formed at the lower end thereof. In the present embodiment, the first inclined surface 47 and the second inclined surface 48 of the recess 45a rotate while sliding on the distal end surface 31b of the distal end plug portion 31, thereby causing the deformation of the spring piece 34 described above, The distal end plug portion 31 can be moved to the proximal end side in the axial direction of the flow tube 20.

  Finally, referring to FIGS. 1 to 3, the operation of each part when the overcap 40 of the application container 1 of the present embodiment is tightened with respect to the cylindrical mouth part 12, and the overcap 40 is the cylindrical mouth part. The operation of each part when it is loosened and removed from 12 will be described.

  First, from the state in which the overcap 40 is separated from the container main body 10, the overcap 40 is put on the cylindrical mouth portion 12 of the container main body 10 and is rotated relative to one of the circumferential directions of the cylindrical mouth portion 12. Thus, the male screw portion 12a and the female screw portion 41a are screwed together. As a result, the top wall portion 42 of the overcap 40 relatively moves so as to approach the tips of the flow tube 20 and the coating plug 30 in the axial direction. Then, the engaging portion 45 that hangs down from the lower surface of the top wall portion 42 arrives at a position that contacts the distal end surface 31b of the distal end plug portion 31 of the coating plug 30 while rotating in the circumferential direction.

  When the overcap 40 is further rotated in the tightening direction, the engaging portion 45 also moves downward while rotating. Therefore, the state where the tip surface 31b enters the triangular recess 45a of the engagement portion 45 in a state where the inclined surfaces 35a and 35b of the tip surface 31b face the first slope 47 and the second slope 48 of the recess 45a. Occur.

  When the overcap 40 is further rotated in the tightening direction from this state, the engaging portion 45 is further moved downward while rotating. In that case, the 1st slope 47 and the 2nd slope 48 of the recessed part 45a press the inclined surfaces 35a and 35b to the circumferential direction, sliding on the inclined surfaces 35a and 35b of the front end surface 31b. Therefore, the distal end plug portion 31 rotates with the engaging portion 45 and rotates in the rotational direction on the tightening side of the overcap 40.

  Here, since the spring piece 34 is wound in the tightening rotation direction when the overcap 40 is tightened with respect to the cylindrical mouth portion 12, when the distal end plug portion 31 follows the overcap 40 and rotates. The plurality of spring pieces 34 are twisted in the direction in which they are twisted together. Thereby, since the effective length in the axial direction of the spring piece 34 is shortened, the distal end plug portion 31 moves to the axial direction proximal end side of the flow tube 20, as shown in FIGS. 1 and 3 (a). The distal end surface 31 b of the distal end plug portion 31 has the inclined surfaces 35 a and 35 b that do not face the first inclined surface 47 and the second inclined surface 48 in the recess 45 a of the engaging portion 45, and the band-shaped end surface 36 has the first inclined surface 47 and the first inclined surface 47. 2 is in a state of facing the slope 48. 1 and 3A show a state in which the outer edge portion of the belt-like end surface 36 is in contact with the first inclined surface 47 and the second inclined surface 48. FIG.

  When the positional relationship between the tip surface 31b and the recess 45a as shown in FIG. 3 (a) is reached, the plurality of spring pieces 34 that have been twisted try to restore to a natural state by a restoring force, and the tip plug portion 31 is over. The cap 40 rotates in the direction opposite to the tightening direction (see the arrow in FIG. 3A). Therefore, the spring piece 34 extends in the axial direction. As a result, the front end surface 31b enters the recess 45a again, and is brought into a fitting state as shown in FIG. 3B, and the tightening of the overcap 40 with respect to the cylindrical mouth portion 12 is completed (see FIG. 2). .

  Since the spring piece 110 of the application container 100 (see FIG. 4) as the comparative example described above is wound in the loose rotation direction when the overcap 40 is loosened from the cylindrical mouth portion 12, the distal end plug portion 31 is provided with the overcap. Even if the follower 40 is followed, the plurality of spring pieces 110 are twisted in the direction in which the spiral is unwound, so that the distal end plug portion 31 does not move toward the proximal end side in the axial direction of the flow tube 20. Therefore, the tip end face 31b cannot come out of the recess 45a, and even when the overcap 40 is tightened into the cylindrical mouth portion 12, the spring piece 110 remains twisted in the direction in which the spiral is unwound. turn into. As a result, in the application container 100 as a comparative example, the spring piece 110 may deteriorate and the sealing performance between the seal surface 37 and the sealed surface 25 may be deteriorated. However, the application container of the present embodiment described above. 1, it is difficult for such a problem to occur.

  Next, the operation when the overcap 40 is rotated from the state in which the overcap 40 is tightened with respect to the cylindrical mouth portion 12 (see FIG. 2) to be loosened and removed from the cylindrical mouth portion 12 will be described. To do.

  First, when the overcap 40 is rotated in a rotational direction that loosens from the cylindrical mouth portion 12, the engaging portion 45 also moves upward while rotating. At this time, the first inclined surface 47 and the second inclined surface 48 of the recess 45a circulate through the distal end plug portion 31 while sliding on the inclined surfaces 35a and 35b of the distal end surface 31b from the state shown in FIG. Press toward the axially proximal end of the tube 20. With this pressing force, the spring piece 34 is compressed and deformed in the axial direction, and the distal end plug portion 31 can be moved to the axially proximal end side of the flow tube 20. Thereby, the close contact between the sealing surface 37 and the surface to be sealed 25 is released, and the flow hole 20a is opened.

  At this time, the first seal cylinder part 43 and the second seal cylinder part 44 of the overcap 40 also move upward, so that they are separated from the tip side cylinder part 23 and the seal between the tip side cylinder part 23 is released. To do. In other words, in conjunction with the turning operation of removing the overcap 40 from the cylindrical mouth portion 12, the inside of the container body 10 is passed through the flow hole 20a, the gap X between the upper cylindrical portion 41c and the distal end side cylindrical portion 23, and the lower side. It is possible to communicate with the outside through the gap Y between the side cylindrical portion 41 b and the cylindrical mouth portion 12. That is, when the overcap 40 is removed before the contents are actually applied to the surface to be coated, the internal pressure and the external pressure of the container body 10 can be made equal.

  When the overcap 40 is further rotated in the direction of loosening from the cylindrical mouth portion 12, the engaging portion 45 is further moved upward, and the distal end surface 31b is completely removed from the recessed portion 45a, and the distal end surface 31b and The engaging portion 45 has a positional relationship in which the distal end surface 31b does not engage with the engaging portion 45 at all. That is, since the compressive force applied to the spring piece 34 is lost, the distal end plug portion 31 is urged upward by the spring piece 34, and the seal surface 37 and the sealed surface 25 are in close contact with each other to block the flow hole 20 a. Return to.

  After the user removes the overcap 40 from the cylindrical mouth portion 12, the user tilts the application container 1 and presses the distal end surface 31 b of the distal end plug portion 31 against the surface to be coated. Thereby, the spring piece 34 is compressed and deformed, and the distal end plug portion 31 moves to the axially proximal end side of the flow tube 20. As a result, the seal surface 37 and the surface to be sealed 25 are separated from each other, and the contents in the container body 10 are poured out from the central opening 24 through the flow hole 20a and applied to the surface to be coated.

  The application container according to the present invention is not limited to the configuration described in the above-described embodiment, and various modifications can be made without departing from the gist of the invention described in the claims. For example, the tip surface 31b of the coating container 1 described above is composed of two flat inclined surfaces 35a and 35b and a strip-shaped end surface 36, but is not limited to this shape, and has, for example, a strip-shaped end surface. It may be a tip surface composed of only two flat inclined surfaces, or may be a tip surface formed of a convex curved surface. In addition, in the application container 1 described above, the engaging portion 45 in which the triangular recess 45a is formed in accordance with the shape of the distal end surface 31b is used, but depending on the shape of the distal end surface of the distal end plug portion, the engagement portion 45 is used. An engaging portion having a shape different from that of the joint portion 45 can also be used.

  The present invention relates to an application container, and more particularly to an application container for applying contents such as a liquid agent.

1: Application container 10: Container body 11: Body 12: Cylindrical mouth 12a: Male screw part 20: Flow pipe 20a: Flow hole 21: Flange part 22: Base end side cylinder part 22a: Annular protrusion 23: Tip side Tube portion 23a: Reduced diameter portion 23b: Cylindrical portion 23c: Upper plate portion 24: Center opening 25: Sealed surface 26: Rib 30: Application plug 31: Tip plug portion 31a: Tip portion 31b of tip plug portion: Tip plug portion Tip surface 32: support portion 32a: side wall portion 32b: upper wall portion 33: base portion 34: spring piece (biasing portion)
35a, 35b: Inclined surface 36: Belt end surface 37: Seal surface 40: Overcap 41: Peripheral wall portion 41a: Female thread portion 41b: Lower cylindrical portion 41c: Upper cylindrical portion 42: Top wall portion 43: First seal cylindrical portion 44 : Second seal cylinder part 45: engagement part 45 a: recess 46: annular step part 47: first slope 48: second slope 100: coating container 110: spring piece O: axis S: accommodation space X: gap Y: gap

Claims (3)

A container body for storing contents;
A distribution cylinder mounted to the cylindrical mouth of the container body;
A distal end plug portion that extends into the flow tube and projects from the distal end side of the flow tube; and a biasing portion that biases the distal end plug portion toward the distal end side of the flow tube. An application stopper;
An overcap that is detachably attached to the cylindrical mouth by screwing,
A portion of the application plug located in the flow tube is contacted from the axially proximal end side of the flow tube with respect to a sealed surface formed in the flow tube according to the position of the distal plug portion. An application container having a sealing surface in contact therewith,
The urging portion is a spiral spring piece wound in the same direction as the rotation direction on the side where the overcap is tightened with respect to the cylindrical mouth portion,
The overcap includes an engaging portion that engages with the distal end plug portion in conjunction with an operation of loosening the overcap from the cylindrical mouth portion and an operation of tightening the overcap with respect to the cylindrical mouth portion. Prepared,
When the overcap is loosened from the cylindrical mouth portion, the engagement portion presses the distal end plug portion toward the axially proximal end side of the flow tube to compress and deform the spring piece, thereby When the stopper is moved to the axially proximal end side of the flow tube and the overcap is tightened with respect to the cylindrical mouth, the tip stopper is rotated to twist and deform the spring piece. An application container, wherein the distal end plug portion is moved to the axially proximal end side of the flow tube. The application container according to claim 1,
The distal end surface of the distal end plug portion includes two inclined surfaces facing each other,
The engagement portion engages with the two inclined surfaces, and moves the distal end plug portion toward the axially proximal end side of the flow tube. The application container according to claim 2,
The overcap includes a peripheral wall portion having a female screw portion that can be screwed with a male screw portion formed in the cylindrical mouth portion, and a ceiling wall portion that closes a distal end side of the peripheral wall portion,
The engaging portion is suspended from the top wall portion, and the engaging portion is provided with a concave portion having a first inclined surface and a second inclined surface that engage with the two inclined surfaces. Application container to do.

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