container

Abstract

To provide a container capable of effectively suppressing co-rotation of a cap body detachably attached to a mouth neck part.SOLUTION: In the vessel 1 according to the present invention, when the cap body 2 is rotated toward the D1 in the closing direction to bring the vessel-side sharply inclined portion 42 and the cap-side sharply inclined portion 32 into contact with each other, the vessel-side stopper portion 47 and the cap-side stopper portion 37 are engaged with each other to mount the cap body 2 around the mouth / neck portion 4. In this mounted state, when a force for rotating the cap main body 2 in the opening direction D2 is applied, further rotation is prevented by the engagement. In the vessel 1, when the height position of the cap body 2 is made higher than the height position in the mounted state, and the cap body 2 is rotated in the opening direction D2 while releasing the engagement between the vessel side and cap side stopper portions 4737 and, the screwing of the cap side screw thread portion CS with respect to the vessel side screw thread portion BS is released, and the cap body 2 can be removed from the mouth neck portion 4.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a container comprising a container body having a neck portion and a cap body attached to the neck portion. [Background technology]

[0002] A container is known that includes a container body having a space for storing a liquid, and a cap body that has a nozzle for dispensing the liquid and is attached to the neck of the container body. Such containers include those in which the cap body is attached to the neck by screwing, and those in which a lid cap that covers the nozzle is attached to the cap body by screwing.

[0003] For example, Patent Document 1 discloses a container in which a wide regulating section is formed in a part of the thread on one of the container body and the cap body, with a height width equal to the height width of the thread groove of the thread on the other, and the width of the thread portion excluding the wide regulating section and the thread along the axial direction is smaller than the width of the thread groove along the axial direction of the thread.

[0004] Patent Document 2 discloses a container that includes a cap that includes an inner plug having a detachable portion surrounded by a weakened portion, and a lid having a cylindrical retaining portion inside, and when the lid is rotated in the opening direction, a first engaging portion formed on the outer periphery of the detachable portion engages with a second engaging portion formed on the inner periphery of the retaining portion, and the cap has a protruding portion on the inner plug that has a straight ridge portion and an inclined ridge portion that extend straight in the rotational direction of the lid, while a protruding portion on the inside of the lid extends straight in the rotational direction of the lid.

[0005] The applicant has also previously proposed a container (Patent Document 3) that includes a main body cap having a cylindrical male threaded portion with a male thread including a spiral ridge formed on its outer surface, a measuring cap having a cylindrical female threaded portion with a female thread including a spiral ridge formed on its inner surface, and a contact ring that abuts against the periphery of the male threaded portion when the measuring cap is tightened to a predetermined position, and that prevents the measuring cap from rotating beyond the predetermined position by abutting a stopper provided on the male threaded portion with the tip of the ridge of the female threaded portion. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 8-183546 [Patent Document 2] Japanese Patent Application Publication No. 2017-190172 [Patent Document 3] Japanese Patent Publication No. 2021-172398 Summary of the Invention [Problem to be solved by the invention]

[0007] When the cap body is attached to the neck portion and the lid cap is attached to the cap body by screwing, the cap body tends to rotate together with the lid cap. In particular, the cap body may come off the neck portion when rotating the lid cap to remove it from the cap body. To prevent this rotation, measures such as providing the cap body with a ratchet mechanism or an undercut shape to prevent the cap body from being detached from the neck portion are considered. However, if the cap body cannot be removed, it becomes difficult to check the amount of liquid remaining in the container body, to pour out any remaining liquid in the container body, and it also makes it difficult for the user of the container to separate the container body and the cap body for resource utilization. The containers disclosed in Patent Documents 1 to 3 have room for improvement in terms of preventing the cap body, which is detachably attached to the neck portion, from rotating together.

[0008] The present invention relates to a container that can effectively prevent co-rotation of a cap body that is detachably attached to a neck portion. [Means for solving the problem]

[0009] The present invention relates to a container comprising a container body having a neck portion and a cap body attached to the neck portion. In one embodiment, the cap body preferably has an outer cylindrical portion that forms an outer periphery of the cap body, and a lid cap is removably attached to the outer cylindrical portion. In one embodiment, it is preferable that the outer tube portion has, on its inner periphery, a cap-side thread portion that is continuous in the circumferential direction and a cap-side stopper portion that is located below the thread portion and protrudes radially inward. In one embodiment, it is preferable that the container body has a circumferentially continuous container-side thread portion formed on the outer periphery of the neck portion, and a container-side stopper portion located below the thread portion and protruding radially outward. In one embodiment, the cap side thread portion preferably has a cap side steep slope portion at its terminal end where the thread pitch widens, and the container side thread portion preferably has a container side steep slope portion that contacts the cap side steep slope portion and where the thread pitch widens. In one embodiment, when the cap body is rotated in the closing direction around the neck portion and the container side steep inclined portion and the cap side steep inclined portion come into contact, it is preferable that the container side stopper portion and the cap side stopper portion engage with each other, and the cap body is attached around the neck portion. In one embodiment, when the cap body is attached around the neck portion and a force is applied to rotate the cap body in the opening direction, it is preferable that further rotation is prevented by the engagement between the stopper portions on the container side and the cap side. In one embodiment, it is preferable that when the height position of the cap body of the container is made higher than the height position in the attached state, and the cap body is rotated in the opening direction while disengaging the stopper portions on the container side and the cap side, the threaded portion on the cap side is released from the threaded portion on the container side, making it possible to remove the cap body from the neck portion. [Effects of the Invention]

[0010] According to the container of the present invention, it is possible to effectively prevent the cap body, which is detachably attached to the neck portion, from rotating together with the cap body. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a side view showing the neck side of a container according to one embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] 3(a) and (b) are perspective views of the neck portion shown in FIG. [Figure 4] 4(a) is a partially cutaway perspective view of the cap body shown in FIG. 2, and FIG. 4(b) is a perspective view of the cap body as viewed from below. [Figure 5] 5 is a perspective view showing a thread portion and a stopper portion of the cap body shown in FIG. 2. FIG. [Figure 6] Figures 6(a) and (b) are perspective views showing the engagement of the threaded portions at an intermediate stage in attaching the cap body to the neck portion, with Figure 6(a) being a perspective view showing the vicinity of the tightening restriction portion and Figure 6(b) being a perspective view showing the vicinity of the stopper portion located on the opening side of the tightening restriction portion. [Figure 7] 7(a) and 7(b) are views corresponding to FIGS. 6(a) and 6(b) in a state where the cap body is attached to the neck portion. [Figure 8] FIG. 8 is a perspective view showing another embodiment of the neck portion according to the present invention. [Figure 9]FIG. 9 is a side view of yet another embodiment of a neck and a cap body according to the present invention, showing the threaded portion. DETAILED DESCRIPTION OF THE INVENTION

[0012] A container of the present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows one embodiment of a container of the present invention. The container 1 shown in FIG. 1 comprises a container body 10 containing a liquid therein, a cap body 2 attached to a neck portion 4 of the container body 10, and a lid cap 6 detachably attached to the cap body 2. The container 1 of this embodiment is a bottle container, and the container body 10 comprises a cylindrical body portion 13 having a bottom, a neck portion 4 having an opening for dispensing the liquid, and a shoulder portion 12 located between the neck portion 4 and the body portion 13. The neck portion 4 has a through-hole (a liquid flow path) that communicates with the interior of the body portion 13.

[0013] The container 1 of this embodiment can be made to stand on its own by placing the bottom of the container body 10 (body 13) on a horizontal surface. In the standing state, the height direction Z (central axis direction) of the container 1 coincides with the vertical direction, and the neck portion 4 is positioned above in the vertical direction and faces the bottom of the body 13 in the same direction. In the container 1 of this embodiment, in the standing state, the central axis of the neck portion 4 coincides with the vertical direction. The height direction (vertical direction) of this container 1 coincides with the central axes of the neck portion 4 and the cap body 2. Unless otherwise specified, the following description of the neck portion 4 and cap body 2 of this embodiment will be given assuming that the central axis directions of the neck portion 4 and cap body 2 are aligned with the vertical direction. The central axis directions of the neck portion 4 and cap body 2 are the height direction Z of the container 1 including the neck portion 4 and cap body 2. This height direction Z will also be simply referred to as the "height direction Z."

[0014] The neck portion 4 is a cylindrical portion having an internal flow path for liquid to flow out, and has openings at both ends in the direction of the central axis. One of the openings in the direction of the central axis of the neck portion 4 is the opening for liquid to flow out. The interior of the neck portion 4 is connected to the interior of the shoulder portion 12 via the other opening of the neck portion 4. The shoulder portion 12 is open at the center of the upper vertical side and has a truncated cone shape that widens and descends horizontally from the periphery of the opening. The body portion 13 forms the main part of the container body 10 and has a cylindrical peripheral wall portion that hangs down from the entire lower periphery of the shoulder portion 12 and a bottom portion located at the lower end of the peripheral wall portion. The container 1 has an internal space defined by the shoulder portion 12 and the body portion 13, and this internal space serves as a space for containing liquid.

[0015] The type of liquid stored in the container 1 of this embodiment is not particularly limited. Examples of such liquids include liquid hair care products such as shampoo, hair conditioner, and hair rinse; liquid soaps such as body soap and hand soap; liquid detergents for clothes and dishes; fabric softeners and bleaches; liquid cleaners for bathrooms, toilets, and floors; liquid cosmetics; liquid beverages; food products; medicines; and engine oil. Highly viscous liquids such as creams are also acceptable. The liquid is stored in the storage space inside the container body 10.

[0016] The container 1 is provided with a lid cap 6 that is removably attached to a cap body 2 (described later) (see FIG. 1). The lid cap 6 of this embodiment is a measuring cap for measuring a liquid. The lid cap 6 has a bottomed, cylindrical lid body 60 that extends in the height direction Z when attached to the cap body 2. The lid cap 6 has a lid-side thread portion (not shown) formed on the outer peripheral surface of the end of the lid body 60 opposite the bottom in the height direction Z, i.e., the end on the opening side of the bottomed tube. This lid-side thread portion and an upper outer cylinder thread portion 21a formed on the inner peripheral surface of an upper outer cylinder portion 21 (described later) are threadably engageable. This allows the lid cap 6 to be removably attached to the outer cylinder portion 20 of the cap body 2. In the container 1 of this embodiment, the liquid contained in the container body 10 can be measured by pouring it into the lid cap 6 through the nozzle portion 24 described below. After measuring, the liquid is usually discharged to another location such as a washing machine.

[0017] The neck portion 4 has a cylindrical tube body 40 with an internal liquid flow path. The tube body 40 forms the main body of the neck portion 4 and is provided at the upper end of the container body 10. The flow path within the neck portion 4 (tube body 40) is connected to the interior of the barrel portion 13 of the container body 10. A container-side thread portion BS that is continuous in the circumferential direction is formed on the outer periphery of the neck portion 4 (tube body 40) (see Figures 2 and 3). The container-side thread portion BS and a cap-side thread portion CS formed on the inner circumferential surface of the lower outer tube portion 22, which will be described later, are threadably engageable. This allows the cap body 2 to be detachably attached to the neck portion 4.

[0018] The neck portion 4 of this embodiment has a small diameter portion 40p at its upper end, whose inner diameter is smaller than that of the lower end (tube body 40). The small diameter portion 40p is a cylindrical portion with an inner diameter smaller than that of the tube body 40, and is located above the tube body 40 to form the upper edge of the neck portion 4 (see FIG. 2). The small diameter portion 40p is connected to the upper end of the tube body 40. A step is formed on the inner circumferential surface of the neck portion 4 due to the difference in inner diameter between the small diameter portion 40p and the tube body 40.

[0019] Hereinafter, for the container side thread portion BS and the cap side thread portion CS, the end at the highest position in the height direction Z will also be referred to as the "starting end," and the end at the lowest position in the height direction Z will also be referred to as the "ending end."

[0020] The neck portion 4 of this embodiment has a flange portion 48 at its lower end that protrudes most radially outward from the outer circumferential surface of the tube body 40 in a plan view. The flange portion 48 is located lower in the height direction Z than the end of the container-side thread portion BS, and has a circular ring shape in a plan view of the neck portion 4. The flange portion 48 has an outer diameter larger than that of an outer large diameter portion 45, which will be described later. The container body 10 has a container-side stopper portion 47 formed on the outer periphery of the neck portion 4 (cylindrical body 40) that is located below the container-side thread portion BS and protrudes radially outward. In this embodiment, the neck portion 4 has the container-side stopper portion 47 formed on the upper surface of the flange portion 48, protruding upward in the height direction Z (see Figures 3(a) and (b)). In this embodiment, the container-side stopper portion 47 is composed of a plurality of small protrusions 47a that protrude upward from the upper surface of the flange portion 48 and are arranged intermittently around the circumference of the neck portion 4. A pair of container-side stoppers 47, 47, each consisting of a plurality of small protrusions 47a, is formed on this flange portion 48 at positions facing each other around the circumference of the neck portion 4.

[0021] The cap body 2 of this embodiment has an outer tube portion 20 equipped with an attachment portion for the neck portion 4, a nozzle portion 24 formed radially inside the outer tube portion 20, an inner tube portion 23 located between the outer tube portion 20 and the nozzle portion 24, and a bottom wall portion 28 connecting the lower edges of the inner tube portion 23 and the nozzle portion 24 (see Figures 2 and 4).

[0022] The outer cylinder portion 20 of this embodiment forms the outer peripheral portion of the cap body 2 and includes an upper outer cylinder portion 21 and a lower outer cylinder portion 22. The upper outer cylinder portion 21 and the lower outer cylinder portion 22 each have a substantially cylindrical shape, and the lower outer cylinder portion 22 is connected to the lower end of the upper outer cylinder portion 21. The upper end portion of the cap body 2 is formed by the upper outer cylinder portion 21. The upper edge of the upper outer cylinder 21 has a circular ring shape in plan view. An upper outer cylinder thread portion 21a that threadably engages with the lid-side thread portion is formed on the inner peripheral surface of the upper outer cylinder 21 (see FIG. 2). The outer diameter of the upper outer cylinder 21 corresponds to the outer diameter of the end of the lid body 60 on the opening side. The lid cap 6 is attached to the upper outer cylinder 21 by inserting the upper outer cylinder 21 through the opening of the lid body 60 and threading the lid-side thread portion and the upper outer cylinder thread portion 21a.

[0023] The inner cylinder portion 23 is a cylindrical portion located radially inside the outer cylinder portion 20 and protruding downward. The inner cylinder portion 23 of this embodiment has a generally cylindrical shape with a lower end opening inclined obliquely relative to the horizontal direction. The lower end of the inner cylinder portion 23 is higher in height on the side opposite a cutout portion 24a of a nozzle portion 24 (described later) in the circumferential direction than on the side where the cutout portion 24a is located (see FIG. 2). Furthermore, the depth of the inner cylinder portion 23 on the side opposite a cutout portion 24a of a nozzle portion 24 (described later) in the circumferential direction is shallower than the side where the cutout portion 24a is located (see FIG. 2). The side of the inner cylinder portion 23 where the cutout portion 24a is located in the circumferential direction protrudes downward more than the lower outer cylinder portion 22 (see FIG. 2). The inner cylinder 23 has at its upper end a large-diameter portion 23p whose outer diameter is larger than that of the lower end of the inner cylinder 23, and the large-diameter portion 23p forms the upper edge of the inner cylinder 23. The large-diameter portion 23p is connected at its upper edge to the outer cylinder 20, which is located radially outward of the inner cylinder 23. The outer diameter of the large-diameter portion 23p corresponds to the inner diameter of the upper end (small-diameter portion 40p) of the neck portion 4.

[0024] In the mounted state where the cap body 2 is attached to the neck portion 4, the neck portion 4 is disposed between the lower outer cylinder portion 22 and the inner cylinder portion 23 of the outer cylinder portion 20, and the inner cylinder portion 23 is inserted into the neck portion 4. In this mounted state, the outer peripheral surface of the large diameter portion 23p of the inner cylinder portion 23 abuts against the inner peripheral surface of the small diameter portion 40p of the neck portion 4. In the mounted state, the cap body 2 of this embodiment can further improve the liquid sealing performance by having the outer peripheral surface of the large diameter portion 23p in close contact with the inner peripheral surface of the small diameter portion 40p.

[0025] The bottom wall portion 28 is located between the inner cylindrical portion 23 and the nozzle portion 24, which is located radially inward of the inner cylindrical portion 23 (see FIG. 2). The bottom wall portion 28 connects the lower edges of the inner cylindrical portion 23 and the nozzle portion 24, and defines a nozzle lower end opening 29 of the nozzle portion 24 (see FIGS. 4(a) and 4(b)). The bottom wall portion 28 has a liquid return opening 28a formed in a portion where the cutout portion 24a is located in the circumferential direction, and has a generally C-shape in which the annular shape is partially cut out by the liquid return opening 28a when viewed from below.

[0026] The nozzle portion 24 is a cylindrical portion located radially inside the inner cylindrical portion 23 and protruding upward from the bottom wall portion 28, and functions as a liquid flow path in the cap body 2. In other words, the nozzle portion 24 is used to dispense liquid into the lid cap 6, which is a measuring cap. In this embodiment, the nozzle portion 24 extends beyond the inner cylindrical portion 23 and further protrudes upward from the upper outer cylindrical portion 21. A nozzle lower end opening 29 is disposed at the lower end of the nozzle portion 24, and the space inside the nozzle portion 24 communicates with the inside of the container body 10 (neck portion 4) via the nozzle lower end opening 29. The nozzle portion 24 is formed so as to surround the periphery of the nozzle lower end opening 29.

[0027] The nozzle portion 24 has a cylindrical shape with a nozzle lower end opening 29 at its lower end and a nozzle upper end opening at its upper end, both of which are connected to each other. The nozzle portion 24 of this embodiment has a notch 24a formed along the height direction Z of the nozzle portion 24 at a portion of its circumferential direction. In this embodiment, the notch 24a and the nozzle upper end opening are continuous (see FIGS. 2 and 4(a)). Furthermore, the notch 24a of this embodiment reaches the lower end of the nozzle portion 24 and is continuous with the nozzle lower end opening 29.

[0028] In this embodiment, the lower outer cylinder portion 22 has a stopper cylinder portion 22b at its lower end, which has an outer diameter larger than that of its upper end (see FIGS. 2 and 4). The stopper cylinder portion 22b forms the lower edge of the lower outer cylinder portion 22. When the cap body 2 is attached to the neck portion 4, the stopper cylinder portion 22b is the portion that abuts against the flange portion 48.

[0029] A cap-side thread portion CS that is continuous in the circumferential direction is formed on the inner periphery of the outer cylinder portion 20 (see Figure 5). More specifically, the cap-side thread portion CS is formed on the inner periphery of the lower outer cylinder portion 22. The inner diameter of the lower outer cylinder portion 22 corresponds to the outer diameter of the neck portion 4. The neck portion 4 of the cap body 2 is detachably attached to the lower outer cylinder portion 22 by inserting the neck portion 4 into the inside of the lower outer cylinder portion 22 and threading the container-side thread portion BS and the cap-side thread portion CS. In other words, the cap-side thread portion CS of the lower outer cylinder portion 22 serves as an attachment portion for the neck portion 4.

[0030] The outer cylindrical portion 20 has a cap-side stopper portion 37 formed on its inner periphery, which is located below the cap-side thread portion CS and protrudes radially inward (see FIG. 5). More specifically, the cap-side stopper portion 37 is formed on the inner periphery of the stopper cylindrical portion 22b. The cap-side stopper portion 37 of this embodiment is composed of a plurality of small protrusions 37a that protrude radially inward from the inner periphery of the stopper cylindrical portion 22b and are arranged intermittently around the circumference of the outer cylindrical portion 20. The stopper cylindrical portion 22b of this embodiment has cap-side stopper portions 37, 37, each composed of a plurality of small protrusions 37a, formed at positions facing each other around the circumference of the outer cylindrical portion 20 (see FIG. 5).

[0031] In the container 1 of this embodiment, the cap body 2 is placed over the neck portion 4, and when the cap body 2 is rotated clockwise around the neck portion 4, the cap-side thread portion CS can be threaded onto the container-side thread portion BS (see Figures 6(a) and (b)). When the cap body 2 is rotated counterclockwise around the neck portion 4, the container-side thread portion BS and the cap-side thread portion CS can be released from the threaded engagement. When the cap body 2 is rotated around the neck portion 4 (circumferential direction), the rotation direction in which the cap-side thread portion CS is threaded onto the container-side thread portion BS is also referred to as the "closing direction D1," and the direction opposite to the closing direction is also referred to as the "opening direction D2." The closing direction D1 coincides with the rotation direction of the lid cap 6 relative to the cap body 2 when the lid cap 6 is attached to the cap body 2, and the opening direction D2 coincides with the rotation direction of the lid cap 6 relative to the cap body 2 when the lid cap 6 is removed from the cap body 2.

[0032] The screw thread portion for attaching the cap body 2 to the neck portion 4 will be described in detail. The container-side thread portion BS of the neck portion 4 continuously and spirally wraps around the outer circumferential surface of the neck portion 4 (tube body 40) (see FIG. 3). The container-side thread portion BS has a container-side steeply inclined portion 42 and a container-side gently inclined portion 41, which have different inclination angles relative to the circumferential direction of the neck portion 4 (the horizontal direction in this embodiment). In this embodiment, the container-side thread portion BS has the container-side steeply inclined portion 42 at its terminal end BSf, and the portion closer to the starting end than the container-side steeply inclined portion 42 forms the container-side gently inclined portion 41. In the circumferential direction of the neck portion 4, the container-side gently inclined portion 41 wraps continuously from the starting end of the container-side thread portion BS toward the container-side steeply inclined portion 42 and connects to the container-side steeply inclined portion 42. The container-side steeply inclined portion 42 has a shorter circumferential length than the container-side gently inclined portion 41. When the cap body 2 is screwed (attached) to the neck portion 4, the container-side steeply inclined portion 42 comes into contact with the cap-side steeply inclined portion 32.

[0033] In the container-side thread portion BS, the container-side steeply inclined portion 42 has an enlarged thread pitch (see FIGS. 3(a) and 3(b)). That is, the container-side steeply inclined portion 42 has a larger thread pitch than the container-side gently inclined portion 41. In this specification, the thread pitch is the amount of movement (mm / 360°) of the cap body 2 in the height direction Z when the cap body 2 is rotated 360° in the closing or opening direction around the neck 4. If the total length of the container-side thread portion BS is less than 1 relative to the circumferential length (outer diameter) of the outer surface of the neck 4, the thread pitch is calculated by converting the amount of movement when the total length of the thread portion BS is set to 1 relative to the circumferential length of the outer surface of the neck 4. The total length of the container-side thread portion BS is the length from the start point to the end point in the circumferential direction of the neck 4. Similarly, for the cap side thread portion CS, if the total length of the thread portion CS is less than 1 relative to the circumferential length (inner diameter) of the inner circumferential surface of the lower outer cylindrical portion 22, the thread pitch is calculated by converting the amount of movement when the total length of the thread portion CS is set to 1 relative to the circumferential length of the inner circumferential surface of the lower outer cylindrical portion 22. The total length of the cap side thread portion CS is the length from the starting point to the terminal end in the circumferential direction of the lower outer cylindrical portion 22.

[0034] The cap-side thread portion CS of the outer cylindrical portion 20 continuously and spirally wraps around the inner circumferential surface of the lower outer cylindrical portion 22 (see FIG. 5). The cap-side thread portion CS has a cap-side steep slope portion 32 and a cap-side gently slope portion 31, which have different inclination angles relative to the circumferential direction of the outer cylindrical portion 20 (the horizontal direction in this embodiment). In this embodiment, the cap-side thread portion CS has the cap-side steep slope portion 32 at its terminal end CSf, and the portion closer to the starting end than the cap-side steep slope portion 32 forms the cap-side gently slope portion 31. In the circumferential direction of the lower outer cylindrical portion 22, the cap-side gently slope portion 31 continuously wraps around from the starting end of the cap-side thread portion CS toward the cap-side steep slope portion 32 and connects to the cap-side steep slope portion 32. The cap-side steep slope portion 32 has a shorter circumferential length than the cap-side gently slope portion 31. In the cap side thread portion CS, the cap side steeply inclined portion 32 has an enlarged thread pitch (see FIG. 5). That is, the cap side steeply inclined portion 32 has a larger thread pitch than the cap side gently inclined portion 31.

[0035] 6 and 7 show the engagement between the container-side thread portion and the cap-side thread portion when the cap body 2 is attached to the neck portion 4 of this embodiment. For ease of explanation, in Fig. 6 and 7, the neck portion 4 is shown from the small diameter portion 40p downward, and the cap body 2 is shown from the lower outer cylinder portion 22 downward, with the upper portions of the neck portion 4 and cap body 2 not shown. Also, for the same reason as above, in Fig. 6 and 7, the outer periphery of the neck portion 4 (container-side thread portion BS, etc.) is shown by a solid line, and the inner periphery of the lower outer cylinder portion 22 (cap-side thread portion CS, etc.) is shown by a dotted line.

[0036] In the container 1 of this embodiment, when the cap body 2 is rotated around the neck 4 in the closing direction D1, the cap-side thread portion CS threads into the container-side thread portion BS (see Figures 6(a) and 6(b)). That is, the upper edge of the cap-side thread portion CS rotates along the lower edge of the container-side thread portion BS. As this rotational movement accompanies this rotational movement, the position of the cap body 2 in the height direction Z moves downward toward the shoulder portion 12 (body portion 13). As the cap body 2 continues to rotate in the closing direction D1, the terminal end CSf of the cap-side thread portion CS approaches the terminal end BSf of the container-side thread portion BS, and the container-side steep slope portion 42 and the cap-side steep slope portion 32 come into contact. As described above, the thread pitch of the container-side steep slope portion 42 is larger than that of the container-side gentle slope portion 41. As a result, when the terminal end of the cap-side thread portion CS rotates along the terminal end of the container-side thread portion BS (the container-side steep slope portion 42), the cap body 2 moves downward (descending) more than when it rotates along the container-side gentle slope portion 41. As this movement occurs, the stopper tube portion 22b of the cap body 2 approaches the flange portion 48, and the cap-side stopper portion 37 engages with the container-side stopper portion 47 (see Figures 7(a) and 7(b)). In this embodiment, the small convex portions 37a of the cap side stopper portion 37 enter between the small convex portions 47a of the container side stopper portion 47 due to the sudden drop of the cap body 2 caused by contact between the steeply inclined portions 42, 32. In this way, the container 1 of this embodiment is in an attached state in which the cap body 2 is attached around the neck portion 4.

[0037] In the container 1 of this embodiment, when a force is applied to rotate the cap body 2 in the opening direction D2 in the above-described attached state, further rotation is prevented by the engagement of the stopper portions 47, 37 on the container side and the cap side (see FIG. 7). That is, in the attached state, the cap body 2 is restricted from rotating in the opening direction D2. As a result, even when the lid cap 6 attached to the cap body 2 is rotated in the opening direction D2 to remove the lid cap 6, co-rotation of the cap body 2 can be effectively prevented, and the attached state of the cap body 2 can be maintained in a good condition. Hereinafter, this effect will be referred to as the "co-rotation suppression effect."

[0038] The cap body 2 can be removed from the neck portion 4 by rotating the cap body 2 while disengaging the stopper portions 47, 37. This removal operation involves first raising the height position of the cap body 2 above its attached height position. That is, the cap body 2 is moved (pulled) away from the container body 10 (body portion 13) in the height direction Z of the container 1. This disengages the stopper portions 47, 37 on the container side and the cap side. The cap body 2 is then rotated in the opening direction D2. This disengages the cap-side thread portion CS from the container-side thread portion BS, allowing the cap body 2 to be removed from the neck portion 4. In this way, the container 1 of this embodiment allows the cap body 2 to be detachably attached to the neck portion 4, while effectively preventing the cap body 2 from rotating as the lid cap 6 rotates in the opening direction D2.

[0039] In the container 1 of this embodiment, as the terminal ends BSf, CSf (steep slope portions 42, 32) of the container-side thread portion BS and the cap-side upper thread portion CS are threaded together and released from the threaded engagement, the amount of movement of the cap body 2 in the height direction Z changes (expands), thereby engaging and releasing the container-side and cap-side stopper portions 47, 37 from each other. To facilitate the engagement and release of the engagement, the steep slope portions 42, 32 constituting the terminal ends of the container-side thread portion BS and the cap-side upper thread portion CS have a larger thread pitch than the gentle slope portions 41, 31 (steep slope portions 42, 32 > gentle slope portions 41, 31). In other words, the steeply inclined portions 42, 32 have a larger angle of inclination relative to the circumferential direction (horizontal direction) than the gently inclined portions 41, 31. The angles of inclination relative to the circumferential direction (horizontal direction) of the steeply inclined portions 42, 32 and the gently inclined portions 41, 31 are angles of inclination when the central axis directions of the neck portion 4 and the cap body 2 are aligned vertically.

[0040] The container-side and cap-side thread portions BS, CS have steeply inclined portions 42, 32 and gently inclined portions 41, 31, each having a different length. The lengths of the steeply inclined portions 42, 32 and gently inclined portions 41, 31 are lengths that spiral around the outer circumferential surface of the neck portion 4 or the inner circumferential surface of the lower outer cylinder portion 22. The steeply inclined portions 42, 32 on the container side and the cap side are preferably shorter in length than the gently inclined portions 41, 31 on the container side and the cap side, respectively (steeply inclined portions 42, 32<gentle inclined portions 41, 31). In other words, the steeply inclined portions 42, 32 preferably have a shorter circumferential extension length than the gently inclined portions 41, 31.

[0041] In the container 1 of this embodiment, the starting end and terminal end BSf of the container side thread portion BS overlap in the circumferential direction of the neck portion 4, and the starting end and terminal end CSf of the cap side thread portion CS do not overlap in the circumferential direction of the cap body 2. From the viewpoint of further improving the operability of attaching and detaching the cap body 2 to the neck portion 4 and the effect of suppressing co-rotation, it is preferable that the container-side and cap-side thread portions BS, CS each have the following configuration. The total length of the container-side thread portion BS is preferably 3 / 4 to 2, and more preferably 1 to 1.5, of the circumferential length of the outer circumferential surface of the neck portion 4. The total length of the cap side thread portion CS is preferably 3 / 4 to 2, more preferably 1 to 1.5, of the circumferential length of the inner periphery of the outer cylinder portion 20, i.e., the circumferential length of the inner periphery of the lower outer cylinder portion 22.

[0042] The container-side and cap-side thread portions BS, CS may be single-start or double-start threads. From the viewpoint of facilitating the alignment of the cap body 2 around the neck portion 4 in a predetermined position when the cap is attached, the container-side and cap-side thread portions BS, CS are preferably single-start threads. In this case, it becomes easier to attach the cap body 2 so that, for example, the notch 24a of the nozzle portion 24 is positioned as desired around the neck portion 4.

[0043] The neck portion 4 of this embodiment has a large outer diameter portion 45 at its lower end, which has a larger outer diameter than the cylindrical main body 40 (see FIGS. 3(a) and 3(b)). The large outer diameter portion 45 is an annular portion located between the cylindrical main body 40 and the flange portion 48 in the height direction Z of the container 1, and has a smaller outer diameter than the flange portion 48. A step is formed between the cylindrical main body 40, the large outer diameter portion 45, and the flange portion 48 due to the difference in their outer diameters, and the upper surfaces of the large outer diameter portion 45 and the flange portion 48 form a two-step staircase.

[0044] In this embodiment, a tightening restriction portion 46 that protrudes radially outward is formed on the outer periphery of the neck portion 4 (see FIGS. 3(a) and 3(b)). More specifically, the tightening restriction portion 46 is formed protruding upward from the upper surface of the outer large diameter portion 45. The thickness of the tightening restriction portion 46 is the same as the thickness of the outer large diameter portion 45, and the outer periphery of the tightening restriction portion 46 and the outer periphery of the outer large diameter portion 45 are flush and continuous. The tightening restriction portion 46 protrudes radially outward from the outer periphery of the tube body 40. The length of the tightening restriction portion 46 in the circumferential direction of the neck portion 4 is the same as or shorter than the length of the container-side steeply inclined portion 42 in the same direction.

[0045] In this embodiment, the tightening restricting portion 46 is adjacent to the terminal end of the container-side thread portion BS (container-side steep slope portion 42) in the circumferential direction of the neck portion 4. The terminal end of the container-side thread portion BS and one side edge of the tightening restricting portion 46 are aligned in the circumferential direction of the neck portion 4. On the outer peripheral surface of the tube body 40 in this embodiment, the lower end of the terminal end of the container-side thread portion BS is surrounded on three sides by the terminal end, the tightening restricting portion 46, and the outer large diameter portion 45 (see FIG. 3 ). As a result, the path of the cap-side steep slope portion 32 is restricted by the container-side steep slope portion 42 and the tightening restricting portion 46. More specifically, when a force is applied to rotate the attached cap body 2 in the closing direction D1, the tightening restricting portion 46, which is located closer to the container-side steep slope portion 42 in the closing direction D1, interferes with the cap-side steep slope portion 32. As a result, further rotation of the cap body 2 is prevented. From the viewpoint of further improving the rotation restriction effect, it is preferable that the tightening restriction portion 46 closes the space between the container-side steeply inclined portion 42 and the outer large diameter portion 45 in the height direction Z.

[0046] The container body 10 of this embodiment has an outward protruding portion 15 that protrudes radially beyond the outer peripheral surface of the neck portion 4 where the container-side thread portion BS is formed in a plan view (see FIGS. 1 and 2). The outward protruding portion 15 is a portion of the neck portion 4 that protrudes radially outward beyond the portion where the container-side thread portion BS is formed (the outer peripheral surface of the cylindrical body 40), and corresponds to, for example, the flange portion 48 or the shoulder portion 12 (see FIG. 1). From the viewpoint of further improving the operability of attaching and detaching the cap body 2 to and from the neck portion 4, it is preferable that a container-side stopper portion 47 be formed on the upper surface of the outer protrusion 15. This makes it possible to further reduce interference between the container-side thread portion BS and the cap-side stopper portion 37 when attaching and detaching the cap body 2 to and from the neck portion 4.

[0047] The container-side stopper portion 47 is located radially outward from the tightening restriction portion 46 (see Figures 3(a) and 3(b)). In this embodiment, the tightening restriction portion 46 is located on the upper surface of the outer large diameter portion 45, and the container-side stopper portion 47 is located on the upper surface of a flange portion 48 that protrudes radially outward from the outer large diameter portion 45. The cap side stopper portion 37 is located radially outward from the cap side thread portion CS (see Figures 4 and 5). In this embodiment, the cap side thread portion CS is located on the inner peripheral surface of the lower outer cylindrical portion 22, and the cap side stopper portion 37 is located on the inner peripheral surface of the stopper cylindrical portion 22b, which is located radially outward from the lower outer cylindrical portion 22. This cap side stopper portion 37 protrudes downward from the periphery of the lower opening of the lower outer cylindrical portion 22 (see Figure 4(b)). In the attached state of the container 1 of this embodiment, the stopper portions 47, 37 on the container side and the cap side are located radially outward of the tightening restriction portion 46. This further reduces interference between the tightening restriction portion 46 and the stopper portions 47, 37, and further improves the operability of attaching and detaching the cap body 2 to and from the neck portion 4.

[0048] Another embodiment of the container according to the present invention will be described below. Hereinafter, the other embodiment will be described, focusing mainly on the components that differ from the embodiment shown in Figures 1 to 7, and similar components will be given the same reference numerals and will not be described again. For components that are not specifically described, the description of the embodiment shown in Figures 1 to 7 will be applied as appropriate.

[0049] The neck portion 4 shown in Fig. 3 has a pair of container-side stoppers 47, 47 facing each other in the circumferential direction, but the number of container-side stoppers 47 in the circumferential direction of the neck portion 4 is not limited to this. The neck portion 4A shown in Fig. 8 has three container-side stoppers 47 arranged at equal intervals in the circumferential direction. In this configuration, each container-side stopper 47 is also made up of a plurality of small protrusions 47a arranged intermittently in the circumferential direction of the neck portion 4A.

[0050] The total length of the container-side thread portion BS may be twice or more the circumferential length of the outer surface of the neck portion 4, as shown in Fig. 9. In the neck portion 4B shown in Fig. 9, the container-side thread portion BS has an intermediate portion 43 located between the starting end BSs and the ending end BSf in the height direction Z of the neck portion 4B. The intermediate portion 43 overlaps with the starting end BSs and the ending end BSf in the circumferential direction of the neck portion 4. 9, the tightening restricting portion 46 closes the gap between the intermediate portion 43 and the container-side steeply inclined portion 42 (the terminal end of the container-side thread portion BS) in the height direction Z. As a result, the path of the cap-side steeply inclined portion CS, i.e., its movement in the closing direction D1, is restricted by the intermediate portion 43, the container-side steeply inclined portion 42, and the tightening restricting portion 46.

[0051] The neck portion 4B shown in Figure 9 has an intermediate branch portion 44 that branches downward from the intermediate portion 43 near the circumferential end of the container-side thread portion BS. The intermediate branch portion 44 is inclined relative to the circumferential direction (horizontal direction) of the neck portion 4B and is parallel to the container-side steep slope portion 42. In other words, the intermediate branch portion 44 and the container-side steep slope portion 42 have the same inclination angle relative to the circumferential direction (horizontal direction) of the neck portion 4B. In this embodiment, the container-side thread portion BS terminates at the same position as the intermediate branch portion 44 and the end of the thread portion BS (container-side steep slope portion 42) in the circumferential direction of the neck portion 4B. This further restricts circumferential and vertical movement of the cap-side steep slope portion CS.

[0052] The cap body 2 in each of the above-described embodiments is a molded product made of synthetic resin such as polypropylene or polyethylene, or bioplastic such as polylactic acid, and is preferably formed by injection molding. The container body 10 can be manufactured by blow molding using synthetic resin such as polyethylene terephthalate, polypropylene, or high density polyethylene.

[0053] The present invention is not limited to the above-described embodiment and can be modified as appropriate. For example, in the above-described embodiment, each stopper portion 47, 37 on the container side and the cap side was composed of a plurality of small protrusions 47a, 37a arranged intermittently in the circumferential direction, but each stopper portion 47, 37 may also consist of a single protrusion. Furthermore, although the neck portion 4 in the above-described embodiment has the tightening restricting portion 46, the neck portion 4 may not have the tightening restricting portion 46 (see FIG. 8). Furthermore, although the bottom wall portion 28 in the above-described embodiment is inclined with respect to the horizontal direction, the bottom wall portion 28 may be parallel to the horizontal direction.

[0054] Furthermore, the central axis of the neck portion 4 of the container 1 may be aligned vertically when the container 1 is freestanding, or may be angled vertically when the container 1 is freestanding. In the latter case, the central axis of the neck portion 4 is angled relative to the central axis of the container body 10, and accordingly, the central axis of the cap body 2 is attached to the neck portion 4 with the central axis also angled relative to the central axis of the container body 10. Furthermore, the container body 10 in the above-described embodiment has a cylindrical body 13 with a bottom and a neck portion 4, but in addition to the body portion 13 and the neck portion 4, it may also have a gripping through-hole and a gripping portion that forms the outer periphery of the through-hole. [Explanation of symbols]

[0055] 1 container 10 Container body 12 Shoulder 13 Torso 15 Outer overhang 2 Cap body 20 outer cylinder 21 Upper outer cylinder 21a Upper outer cylinder thread 22 Lower outer cylinder 22b Stopper cylinder 23 Inner cylinder 23p large diameter part 24 Nozzle section 24a Notch 28 Bottom wall 28a opening 29 Nozzle bottom opening 31 Gentle slope on the cap side 32 Steep slope on the cap side 37 Cap side stopper 37a Small convex part 4,4A,4B Oral part 40 Cylinder body 40p small diameter part 41 Gentle slope on container side 42 Steep slope on container side 43 Middle section 44 Intermediate branch 45 outer large diameter part 46 Tightening regulation part 47 Container side stopper 47a Small convex part 48 Flange 6 Lid cap 60 Lid body

Claims

1. A container comprising a container body having a neck portion and a cap body attached to the neck portion, The cap body has an outer cylindrical portion that forms an outer peripheral portion of the cap body, and a lid cap is detachably attached to the outer cylindrical portion, The outer cylindrical portion has an inner peripheral portion formed with a cap-side thread portion that is continuous in the circumferential direction and a cap-side stopper portion that is located below the thread portion and protrudes radially inward, The container body has a circumferentially continuous container-side thread portion formed on the outer periphery of the neck portion, and a container-side stopper portion located below the thread portion and protruding radially outward, the cap-side thread portion has a cap-side steep slope portion at an end thereof where the thread pitch increases, and the container-side thread portion has a container-side steep slope portion that contacts the cap-side steep slope portion and where the thread pitch increases, the cap body is rotated around the neck portion in a closing direction, and when the container-side steep inclined portion and the cap-side steep inclined portion come into contact with each other, the container-side stopper portion and the cap-side stopper portion engage with each other, and the cap body is attached around the neck portion; When a force is applied to rotate the cap body in an opening direction in the attached state, the stopper portions on the container side and the cap side are engaged with each other to prevent further rotation, A container in which, when the height position of the cap body is made higher than the height position in the attached state and the cap body is rotated in the opening direction while disengaging the stopper portions on the container side and the cap side, the cap side thread portion is disengaged from the container side thread portion, making it possible to remove the cap body from the neck portion.

2. a tightening restriction portion is formed on the outer periphery of the neck portion, adjacent to the terminal end of the container-side thread portion in the circumferential direction and protruding radially outward; The container according to claim 1 , wherein the path of the cap-side steeply inclined portion is restricted by the container-side steeply inclined portion and the tightening restricting portion.

3. the container-side stopper portion is located radially outward of the tightening restriction portion, The container according to claim 2 , wherein the cap-side stopper portion is located radially outward of the cap-side thread portion.

4. 3. The container according to claim 1, wherein the container body has an outer protrusion that, when viewed in a plane, protrudes radially beyond the outer peripheral surface of the neck portion on which the container-side thread portion is formed, and the container-side stopper portion is formed on the upper surface of the outer protrusion.

5. 3. The container according to claim 1, wherein the total length of the cap-side thread portion is at least 3 / 4 of the circumferential length of the inner periphery of the outer cylindrical portion.

6. the cap body has an inner cylindrical portion located radially inside the outer cylindrical portion and protruding downward, the inner cylindrical portion has an upper end portion having a larger diameter than a lower end portion; the neck portion has an upper end portion having a small diameter portion whose inner diameter is smaller than that of a lower end portion, The container according to claim 1 or 2, wherein the large diameter portion and the small diameter portion abut against each other in the attached state.

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