Cap device

Abstract

To provide a cap device capable of preventing a lid member from unintentionally becoming loose after the lid member is rotated in a fastening direction and joined to a cap body.SOLUTION: A cap body includes: a first cylindrical member 16 including a first screw part at an outer periphery; and a first pour-out port. A lid member includes a second cylindrical member including a second screw part on an inner periphery. By rotating the lid member in a fastening direction 37, the second screw part is screwed into the first screw part, the lid member is joined to the cap body and the first pour-out port is closed. A stopper 41 for restricting the rotation of the lid member in the fastening direction 37 is provided at the cap body. A restriction protrusion piece 42 is provided at the lid member capable of coming into contact with the stopper 41 in the fastening direction 37. A loosening protrusion part 45 for inhibiting the lid member joined to the cap body rotating in a loosening direction 38 is provided at the cap body. Between the loosening protrusion part 45 and the stopper 41, a locking space 52 is formed. When the lid member is rotated in the fastening direction 37, the restriction protrusion piece 42 rides over the loosening protrusion part 45 and can enter the locking space 52.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a capping device that is attached to a container such as a milk carton. [Background technology]

[0002] Conventionally, as shown in FIG. 15, this type of cap device has a cap body 101 attached to a container, and a lid member 102 attached to the cap body 101 in a detachable manner. The cap body 101 has a first cylindrical member 104 having a male thread 103 formed on its outer periphery.

[0003] The lid member 102 has a second cylindrical member 106 having a female thread 105 formed on its inner circumference, a flat plate portion 107 provided at the upper end of the second cylindrical member 106, a nozzle 108 erected on the flat plate portion 107, and an upper lid 110 rotatably connected to the flat plate portion 107 via a hinge 109.

[0004] By turning the second cylindrical member 106 relative to the cap body 101 in the tightening direction, the female thread 105 is threadedly engaged with the male thread 103, and the lid member 102 is joined to the cap body 101.

[0005] Nozzle 108 is closed by rotating top lid 110 around hinge 109 in closing direction 112. Furthermore, nozzle 108 is opened by rotating top lid 110 around hinge 109 in opening direction 113, allowing liquid in the container to be poured out from nozzle 108. The capping device 100 as described above is described in, for example, Patent Document 1 below. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2023-16766 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the above-described conventional type, when the second cylindrical member 106 is rotated in the tightening direction relative to the cap body 101 and the second cylindrical member 106 is tightened relative to the first cylindrical member 104, there is a risk that the second cylindrical member 106 may be rotated excessively in the tightening direction, causing damage to the female thread 105 and the male thread 103.

[0008] Furthermore, after the second cylindrical member 106 is tightened into the first cylindrical member 104 and the lid member 102 is joined to the cap body 101, there is a risk that the second cylindrical member 106 may inadvertently rotate in the loosening direction relative to the first cylindrical member 104 due to vibration or the like, causing it to loosen. If the second cylindrical member 106 becomes loose in this way, there is a risk that the liquid inside the container will leak out from between the first cylindrical member 104 and the second cylindrical member 106 to the outside.

[0009] To provide a cap device which can prevent the lid member from being over-tightened when the lid member is turned in the tightening direction to be joined to the cap body, and can prevent the lid member from being inadvertently loosened after being joined to the cap body. [Means for solving the problem]

[0010] In order to achieve the above object, the first invention provides a capping device having a cap body attached to a container and a lid member detachably attached to the cap body, The cap body has a first cylindrical member having a first threaded portion on its outer periphery and a first spout communicating with the inside of the container, The first spout is formed inside the first cylindrical member, the cover member has a second cylindrical member having a second threaded portion on its inner periphery, By turning the lid member relative to the cap body in a tightening direction, the second screw portion screws into the first screw portion, and the lid member is joined to the cap body to close the first spout, By rotating the lid member in the loosening direction relative to the cap body, the lid member is separated from the cap body to open the first spout, A stopper is provided on the cap body to limit the rotation of the lid member in the tightening direction, A limiting protrusion that can come into contact with the stopper in the tightening direction is provided on the cover member, The cap body is provided with a locking projection that prevents the lid member coupled to the cap body from rotating in the loosening direction, The loosening projection is disposed at a position spaced a predetermined distance from the stopper in the loosening direction, A locking space is formed between the locking projection and the stopper, The restricting projection abuts against the locking projection in both the tightening direction and the loosening direction, When the cover member is rotated in the tightening direction, the limiting projection can get over the loosening projection and enter the locking space, When the cover member is rotated in the loosening direction, the limiting projection can climb over the loosening projection and be released from the locking space.

[0011] With this, when the lid member is turned in the tightening direction to connect to the cap body, the limiting protrusion of the lid member overcomes the loosening protrusion of the cap body and abuts against the stopper, making it difficult to turn the lid member further in the tightening direction, so the lid member is tightened to the cap body by the appropriate amount. This makes it possible to prevent the lid member from being over-tightened to the cap body.

[0012] Furthermore, when the lid member is tightened and connected to the cap body as described above, the limiting protrusion enters the locking space, so that even if the lid member attempts to rotate in the loosening direction due to, for example, vibration, the limiting protrusion abuts against the loosening prevention protrusion, thereby preventing the lid member from rotating in the loosening direction and preventing the lid member from accidentally loosening due to, for example, vibration.

[0013] Furthermore, after the lid member is connected to the cap body, when the contents of the container are to be poured out, the lid member is forcibly turned in the loosening direction, causing the limiting protrusion to climb over the locking protrusion and leave the locking space, removing the lid member from the cap body and opening the first spout, allowing the contents of the container to be poured out through the first spout.

[0014] The cap device according to the second aspect of the present invention is provided with a groove formed in the cap body and opening toward the tip of the first cylindrical member around the base of the first cylindrical member, A stopper, a locking projection, and a locking space are provided inside the groove, The limiting projection is capable of entering the locking space when it is inserted into the groove.

[0015] With this, when the lid member is connected to the cap body, the stopper, the locking projection, the locking space, and the limiting projection are hidden inside the groove and are not exposed to the outside, which improves the appearance of the cap device when viewed from the outside.

[0016] In the capping device according to the third aspect of the present invention, a plurality of stoppers, locking projections, and locking spaces are arranged around the first cylindrical member at predetermined angular intervals in the circumferential direction, The plurality of limiting protrusions are arranged on the cover member at predetermined angular intervals in the circumferential direction.

[0017] With this, when the lid member is rotated in the tightening direction to connect to the cap body, each limiting protrusion passes over its corresponding loosening protrusion only once to enter its corresponding locking space, which makes it easier and more reliable to connect the lid member to the cap body than when the limiting protrusions pass over the loosening protrusions multiple times to enter the locking space.

[0018] In the cap device according to the fourth aspect of the present invention, the cap body has a flange member attached to the container, The flange member is provided at the base end of the first cylindrical member, The stopper, the locking projection, and the locking space are provided on the flange member.

[0019] In the cap device according to the fifth aspect of the present invention, the locking projection has a first inclined surface inclined so as to retreat in the tightening direction and a second inclined surface inclined so as to retreat in the loosening direction, The limiting projection abuts against the first inclined surface in the tightening direction and against the second inclined surface in the loosening direction.

[0020] According to this, when the lid member is rotated in the tightening direction to be coupled to the cap body, the limiting projection slides over the first inclined surface of the locking projection while in sliding contact with the locking projection, and smoothly moves over the locking projection and enters the locking space. Furthermore, when the lid member is rotated in the loosening direction to remove it from the cap body, the limiting projection smoothly moves over the locking projection while making sliding contact with the second inclined surface of the locking projection, and is released from the locking space. This makes it possible to prevent damage to the limiting projection or the loosening prevention projection when the limiting projection climbs over the loosening prevention projection.

[0021] In the capping device according to the sixth aspect of the present invention, the first inclined surface is more gently inclined than the second inclined surface.

[0022] With this, when the lid member is rotated in the tightening direction to be coupled to the cap body, the limiting projection slides over the first inclined surface of the locking projection and moves smoothly over the locking projection to enter the locking space. Thereafter, even if the cover member attempts to rotate in the loosening direction due to vibration or the like, the limiting protrusion will abut against the second inclined surface of the loosening prevention protrusion, thereby reliably preventing the cover member from rotating in the loosening direction and preventing the cover member from loosening unintentionally.

[0023] In the cap device according to the seventh aspect of the present invention, the limiting protrusions can come into surface contact with the stoppers.

[0024] As a result, when the lid member is turned in the tightening direction to connect it to the cap body, the limiting protrusion abuts against the stopper, making it difficult to turn the lid member further in the tightening direction, so that the lid member is tightened to the cap body with the appropriate amount of tightening. At this time, the limiting projections abut against the stoppers with their faces facing each other, so that the rotation of the cover member in the tightening direction can be firmly received and stopped by the stoppers.

[0025] In the cap device according to the eighth aspect of the present invention, the lid member has a third cylindrical member, a second spout communicating with the inside of the second cylindrical member, and a lid body that opens and closes the second spout, The second pouring outlet is formed inside the third cylindrical member.

[0026] With this, with the lid member connected to the cap body, the contents in the container can be poured out from the second pouring outlet by operating the lid body to open the second pouring outlet.

[0027] In the capping device of the ninth aspect of the present invention, a release member surrounded by a breakable weakened portion is provided inside the first cylindrical member, When the weakened portion breaks and the detachable member is detached, the first pouring outlet communicates with the inside of the container.

[0028] According to this, when the cap device is first opened, the lid member is turned in the loosening direction to remove it from the cap body. Then, by breaking the weakened portion and removing the removal member, the inside of the first cylindrical member is opened and the first spout communicates with the inside of the container. This allows the contents of the container to be poured out from the first spout. [Effects of the Invention]

[0029] As described above, according to the present invention, when the lid member is rotated in the tightening direction to be coupled to the cap body, it is possible to prevent the lid member from being over-tightened. Furthermore, after the lid member is coupled to the cap body, it is possible to prevent the lid member from accidentally loosening due to, for example, vibration. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is a diagram of a container equipped with a cap device according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the cap device in the unopened state. [Figure 3] FIG. 2 is a cross-sectional view of the cap body of the cap device according to the first embodiment. [Figure 4]FIG. 4 is a view taken along the arrow XX in FIG. 3. [Figure 5] FIG. 2 is a cross-sectional view of the lid member of the capping device according to the first embodiment. [Figure 6] FIG. 6 is a view taken along the arrow XX in FIG. 5. [Figure 7] 10 is a cross-sectional view of the cap device according to the first embodiment, showing the state in which the lid member and the release member have been removed from the cap body. [Figure 8] 10 is a partially cutaway plan view illustrating the functions of the stopper, the limiting projection, and the loosening prevention projection of the cap device. FIG. [Figure 9] 10 is a partially cutaway side view illustrating the functions of the stopper, the limiting projection, and the loosening prevention projection of the cap device. FIG. [Figure 10] 10 is a plan view for explaining the functions of the stopper, the limiting protrusion, and the loosening prevention protrusion of the cap device, showing the state in which the limiting protrusion abuts against the loosening prevention protrusion and overcomes the loosening prevention protrusion. FIG. [Figure 11] 9 is a view taken along the arrow XX in FIG. 8. [Figure 12] FIG. 10 is a cross-sectional view of the cap device of the same embodiment, showing the state in which the lid member and the release member have been removed from the cap body to open it, and then the lid member has been joined to the cap body to close it. [Figure 13] 10 is an enlarged plan view of a locking protrusion of a capping device according to a second embodiment of the present invention. FIG. [Figure 14] FIG. 10 is a cross-sectional view of a capping device according to a third embodiment of the present invention, showing an unopened state. [Figure 15] FIG. 10 is a cross-sectional view of a conventional capping device. DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, embodiments of the present invention will be described with reference to the drawings. (First embodiment) In the first embodiment, as shown in FIG. 1, a cap device 10 is provided on the top of a container 1 such as a milk carton. As shown in FIG. 2, the cap device 10 has a cap body 11 attached to the container 1 and a lid member 12 attached to the cap body 11 in a detachable manner.

[0032] As shown in Figures 2 to 4, the cap body 11 has a flange member 14 that is attached to the container 1 by, for example, welding, a cylindrical first tubular member 16 that has a male thread 15 (an example of a first threaded portion) on its outer periphery, and a first spout 17 that communicates with the inside of the container 1.

[0033] The flange member 14 is a thin plate-like member, and is provided at the base end (lower end) of the first cylindrical member 16. The flange member 14 has an annular groove 18 formed therein that is open toward the tip (upward) of the first cylindrical member 16. The groove 18 is arranged around the base portion of the first cylindrical member 16, and has an outer peripheral wall surface 47 and an inner peripheral wall surface 48 that face each other in the radial direction 23, as well as a groove bottom surface 49.

[0034] The first spout 17 is formed inside the first cylindrical member 16. Also, a detachment member 20 surrounded by a breakable thin-walled weakened portion 19 is provided inside the first cylindrical member 16. The detachment member 20 has a detachment portion main body 21 and a pull ring 22 (operation portion) provided on the detachment portion main body 21.

[0035] As shown in Figure 7, when a user pulls the pull ring 22, the weakened portion 19 breaks and the detachment portion main body 21 detaches, opening up the inside of the first cylindrical member 16 and connecting the first spout 17 to the inside of the container 1.

[0036] As shown in Figures 5 and 6, the lid member 12 has a cylindrical second tubular member 26 with a female thread 25 (an example of a second screw portion) on its inner circumference, a circular top plate 27 provided at the upper end of the second tubular member 26, a third tubular member 28 erected on the top plate 27, a cylindrical first sealing member 29 arranged on the inside of the second tubular member 26 in the radial direction 23, a second spout 30 communicating with the inside of the second tubular member 26, and a lid body 31 that opens and closes the second spout 30.

[0037] 2, with the male thread 15 and the female thread 25 engaged, the second cylindrical member 26 is fastened to the first cylindrical member 16 from the outside in the radial direction 23 to be joined. The first sealing member 29 is provided on the top plate 27 and is inserted into the tip of the first cylindrical member 16, and the outer periphery of the first sealing member 29 is in close contact with the inner periphery of the tip of the first cylindrical member 16, thereby providing a watertight seal between the cover member 12 and the first cylindrical member 16. 5, the second pouring outlet 30 is formed inside the third cylindrical member 28. The inner diameter of the third cylindrical member 28 is set to be smaller than the inner diameter of the first cylindrical member 16. The lid body 31 is rotatably connected to the top plate 27 (or the upper end of the second cylindrical member 26) via a hinge 33, and has a second seal member 34 in the shape of a round rod.

[0038] As shown in Figure 2, when the lid body 31 is closed, the second seal member 34 is inserted into the tip of the third cylindrical member 28, and the outer periphery of the second seal member 34 is in close contact with the inner periphery of the tip of the third cylindrical member 28, thereby creating a watertight seal between the third cylindrical member 28 and the lid body 31.

[0039] By turning the lid member 12 relative to the cap body 11 in the tightening direction 37 (clockwise when viewed from above), the female thread 25 screws into the male thread 15, as shown in Figure 2, and the lid member 12 is connected to the cap body 11 to close the first spout 17.

[0040] Furthermore, by turning the lid member 12 relative to the cap body 11 in the loosening direction 38 (counterclockwise when viewed from above), the lid member 12 separates from the cap body 11 and opens the first spout 17, as shown in FIG.

[0041] As shown in FIG. 4, a plurality of stoppers 41 for restricting rotation of the lid member 12 in the tightening direction 37 are provided inside the groove 18 of the flange member 14 of the cap body 11 .

[0042] 5 and 6, a plurality of limiting protrusions 42 capable of coming into contact with stoppers 41 in the tightening direction 37 are provided at the lower end of the second cylindrical member 26 of the cover member 12. As shown in FIGS. 8 and 9, each limiting protrusion 42 can come into contact with each stopper 41 with its face facing each other.

[0043] As shown in Figures 5, 6, and 9, a third inclined surface 43 is formed on the limiting protrusion 42, which slopes backward from the lower end of the second tubular member 26 in the tightening direction 37 and reaches the lower end of the limiting protrusion 42.

[0044] 4 and 8 to 11, a plurality of loosening prevention projections 45 that prevent the lid member 12 coupled to the cap body 11 from rotating in the loosening direction 38 are provided inside the groove 18 of the flange member 14 of the cap body 11. The loosening prevention projections 45 are arranged at positions spaced a predetermined distance 51 from the stopper 41 in the loosening direction 38. A locking space 52 is formed between the locking projection 45 and the stopper 41. The locking space 52 is disposed inside the groove 18.

[0045] These stoppers 41, loosening protrusions 45, and locking spaces 52 are each arranged at predetermined angular intervals in the circumferential direction 53 around the first cylindrical member 16. For example, as shown in Fig. 4, three stoppers 41, three loosening protrusions 45, and three locking spaces 52 are each arranged at 120° (an example of a predetermined angle) in the circumferential direction 53, but a number other than three may also be arranged at angles other than 120°.

[0046] Similarly, the limiting protrusions 42 are arranged at predetermined angular intervals in the circumferential direction 53 on the second cylindrical member 26 of the cover member 12. For example, as shown in Fig. 6, three limiting protrusions 42 are arranged at 120° intervals (one example of the predetermined angle) in the circumferential direction 53, but a number other than three limiting protrusions may also be arranged at angles other than 120° intervals.

[0047] As shown in Figures 8 and 10, the loosening protrusion 45 has a cross-sectional shape in which a cross section perpendicular to an axis 54 (see Figure 3) passing through the center of the first cylindrical member 16 is an isosceles triangle, and has an apex 55 protruding from the outer peripheral wall surface 47 of the groove 18 toward the inside of the groove 18, a first inclined surface 56 that slopes backward from the outer peripheral wall surface 47 in the tightening direction 37 to reach the apex 55, and a second inclined surface 57 that slopes backward from the outer peripheral wall surface 47 in the loosening direction 38 to reach the apex 55.

[0048] The first inclined surface 56 is inclined from the outer peripheral wall surface 47 toward the inner peripheral wall surface 48 in the tightening direction 37, and reaches an apex 55. The second inclined surface 57 is inclined from the outer peripheral wall surface 47 toward the inner peripheral wall surface 48 in the loosening direction 38, and reaches an apex 55. The inclination angle α of the first inclined surface 56 and the inclination angle β of the second inclined surface 57 relative to the outer peripheral wall surface 47 of the groove 18 are set to be the same angle. A predetermined gap 58 is formed between the apex 55 of the locking projection 45 and the inner peripheral wall surface 48 in the radial direction 23 .

[0049] When the cover member 12 is rotated in the tightening direction 37, the limiting protrusion 42 enters the inside of the groove 18 from above, abuts against the first inclined surface 56 in the tightening direction 37 as shown by the solid line in Figure 10, and can then climb over the loosening protrusion 45 and enter the locking space 52 as shown by the solid line in Figure 8.

[0050] When the cover member 12 is rotated in the loosening direction 38, the limiting protrusion 42 abuts against the second inclined surface 57 in the loosening direction 38 as shown by the imaginary line (A) in Figure 10, and can then climb over the loosening protrusion 45 and disengage from the locking space 52 as shown by the imaginary line in Figure 8. As shown in FIG. 8, the limiting protrusion 42 is configured to come into contact with the loosening prevention protrusion 45 with a predetermined overlap 60 (for example, 0.1 mm to 0.2 mm). The operation of the above configuration will now be described.

[0051] When the cap device 10 is in an unopened state, the limiting projection 42 enters the locking space 52, as shown by the imaginary line in Fig. 4 and the solid line in Fig. 8. When the unopened cap device 10 is subsequently opened for the first time, the user rotates the lid member 12 relative to the cap body 11 in the loosening direction 38, and separates (removes) the lid member 12 from the cap body 11, as shown in Fig. 7. At this time, the limiting projection 42 temporarily bends toward the inside D in the radial direction 23, as shown by the imaginary line (B) in Fig. 10 and the imaginary line in Fig. 11, while sliding against the second inclined surface 57 in the loosening direction 38, as shown by the imaginary line (A) in Fig. 10, and then rides over the loosening projection 45 to separate from the locking space 52, as shown by the imaginary line in Fig. 8 and the imaginary line in Fig. 9.

[0052] Thereafter, when the user pulls the pull ring 22, as shown in Figure 7, the weakened portion 19 breaks and the detachment portion main body 21 detaches, opening up the first cylindrical member 16 and connecting the first spout 17 to the inside of the container 1. This opens the cap device 10, allowing the contents in the container 1 to be poured out through the first spout 17. The contents may be, for example, a liquid such as milk or a paste-like fluid.

[0053] Then, when the user turns the lid member 12 relative to the cap body 11 in the tightening direction 37, the female thread 25 screws into the male thread 15, as shown in Figure 12, and the lid member 12 is connected to the cap body 11 to close the first spout 17.

[0054] At this time, the outer periphery of the first seal member 29 comes into close contact with the inner periphery of the tip end of the first cylindrical member 16, thereby providing a watertight seal between the cover member 12 and the first cylindrical member 16. Furthermore, while the limiting protrusion 42 has entered the inside of the groove 18 from above, it slides against the first inclined surface 56 in the tightening direction 37 as shown by the solid line in Fig. 10, and temporarily bends toward the inside D in the radial direction 23 as shown by the imaginary line (B) in Fig. 10 and the imaginary line in Fig. 11, and then rides over the loosening prevention protrusion 45 and comes into contact with the stopper 41 as shown by the solid line in Fig. 8 and the solid line in Fig. 9.

[0055] This makes it difficult to turn the lid member 12 further in the tightening direction 37, so that the lid member 12 is tightened to the cap body 11 by an appropriate amount. Therefore, it is possible to prevent the lid member 12 from being tightened too much to the cap body 11.

[0056] Furthermore, as shown by the solid lines in Figure 8 and the solid lines in Figure 9, the limiting protrusion 42 abuts against the stopper 41 with its face to face, so that the rotation of the cover member 12 in the tightening direction 37 can be firmly received and stopped by the stopper 41.

[0057] Furthermore, when lid member 12 is turned in tightening direction 37 as described above and connected to cap body 11, limiting projection 42 enters locking space 52 as shown by the solid lines in Figures 8 and 9, so that even if lid member 12 attempts to rotate in loosening direction 38 due to vibration, for example, limiting projection 42 abuts against loosening prevention projection 45. This prevents lid member 12 from rotating in loosening direction 38, making it possible to prevent lid member 12 from accidentally loosening due to vibration, for example.

[0058] 10 and 11, the limiting projection 42 temporarily bends toward the inside D in the radial direction 23 while sliding against the first inclined surface 56 in the tightening direction 37, and temporarily bends toward the inside D in the radial direction 23 while sliding against the second inclined surface 57 in the loosening direction 38, so that the limiting projection 42 can smoothly climb over the loosening projection 45. This makes it possible to prevent damage to the limiting projection 42 or the loosening projection 45 when the limiting projection 42 climbs over the loosening projection 45.

[0059] 2 and 12, when the lid member 12 is connected to the cap body 11, the stopper 41, the loosening protrusion 45, the locking space 52, and the limiting protrusion 42 are hidden inside the groove 18 and are not exposed to the outside. This improves the appearance of the cap device 10 when viewed from the outside.

[0060] Furthermore, when the lid member 12 is connected to the cap body 11 as shown in Figure 12, the user can rotate the lid body 31 in the opening direction 63 as shown by the imaginary line in Figure 12, causing the second sealing member 34 to detach from the third cylindrical member 28, opening the third cylindrical member 28, and allowing the contents in the container 1 to be poured out to the outside through the second pouring outlet 30.

[0061] 12, the user rotates the lid body 31 in the closing direction 64, whereby the second seal member 34 is inserted into the tip of the third cylindrical member 28, closing the second spout 30. At this time, the outer periphery of the second seal member 34 comes into close contact with the inner periphery of the tip of the third cylindrical member 28, thereby creating a watertight seal between the third cylindrical member 28 and the lid body 31.

[0062] Since the inner diameter of the third cylindrical member 28 is set smaller than the inner diameter of the first cylindrical member 16, a small amount of the contents can be poured out by opening the lid body 31 as shown by the imaginary line in Fig. 12 and pouring the contents out from the second pouring outlet 30 of the third cylindrical member 28. Also, as shown in Fig. 7, a large amount of the contents can be poured out by removing the lid member 12 from the cap body 11 and pouring the contents out from the first pouring outlet 17 of the first cylindrical member 16.

[0063] 4, three sets of stoppers 41, loosening protrusions 45, and locking spaces 52 are arranged around the first cylindrical member 16 at intervals of 120° (predetermined angle) in the circumferential direction 53, and as shown in Fig. 6, three limiting protrusions 42 are arranged on the lid member 12 at intervals of 120° (predetermined angle) in the circumferential direction 53. Therefore, when the lid member 12 is turned in the tightening direction 37 to be coupled to the cap body 11, as shown in Fig. 8, each limiting protrusion 42 moves over each loosening protrusion 45 only once to enter the corresponding locking space 52. This makes it possible to couple the lid member 12 to the cap body 11 more easily and reliably than when the limiting protrusions 42 move over the loosening protrusions 45 multiple times to enter the locking space 52. (Second embodiment)

[0064] 13, in the second embodiment, the first inclined surface 56 of the locking projection 45 is more gently inclined than the second inclined surface 57. That is, the inclination angle α of the first inclined surface 56 is set to be smaller than the inclination angle β of the second inclined surface 57.

[0065] As a result, when the lid member 12 is rotated in the tightening direction 37 to connect to the cap body 11, the limiting protrusion 42 temporarily bends inward in the radial direction 23 while sliding against the first inclined surface 56, and overcomes the loosening protrusion 45 to abut against the stopper 41.

[0066] At this time, since the inclination angle α of the first inclined surface 56 is smaller than the inclination angle β of the second inclined surface 57, the limiting projection 42 can ride over the loosening prevention projection 45 in the tightening direction 37 even more smoothly.

[0067] 2, the lid member 12 has the third cylindrical member 28, the second spout 30, the lid body 31, and the hinge 33, but it may not have the third cylindrical member 28, the second spout 30, the lid body 31, and the hinge 33. One form of such a cap device 10 will be described in the following third embodiment. (Third embodiment)

[0068] In the third embodiment, as shown in FIG. 14, the lid member 12 has a second cylindrical member 26 and a top plate 27, but does not have a third cylindrical member 28, a second spout 30, a lid main body 31, or a hinge 33.

[0069] According to this, the user can turn the lid member 12 relative to the cap body 11 in the loosening direction 38, detach the lid member 12 from the cap body 11, and pull the pull ring 22 to detach the detachment part body 21, thereby pouring the contents in the container 1 out to the outside through the first pouring outlet 17.

[0070] 8 , the locking projection 45 is formed on the outer peripheral wall surface 47 of the groove 18 and has an apex 55 that protrudes from the outer peripheral wall surface 47 toward the inside of the groove 18 in the radial direction 23, but it may also be formed on the inner peripheral wall surface 48 of the groove 18 and have an apex 55 that protrudes from the inner peripheral wall surface 48 toward the inside of the groove 18 in the radial direction 23. Alternatively, the locking projection 45 may be formed on the groove bottom surface 49 of the groove 18 and have an apex 55 that protrudes upward from the groove bottom surface 49 toward the inside of the groove 18. [Explanation of symbols]

[0071] 1 container 10. Capping device 11 Cap body 12 Lid member 14 Flange member 15 Male thread (first threaded part) 16 First cylindrical member 17 1st spout 18 Groove 19 Weakened part 20 Release member 25 Female thread (second threaded section) 26 Second cylindrical member 28 Third cylindrical member 30 2nd spout 31 Lid body 37 Tightening direction 38 Loosening direction 41 Stopper 42 Restriction piece 45 Loosening protrusion 51 Predetermined interval 52 Locking space 53 Circumferential direction 56 1st slope 57 Second slope

Claims

1. A cap device having a cap body attached to a container and a lid member detachably attached to the cap body, The cap body has a first cylindrical member having a first threaded portion on its outer periphery and a first spout communicating with the inside of the container, The first pouring outlet is formed inside the first cylindrical member, the cover member has a second cylindrical member having a second threaded portion on its inner periphery, By turning the lid member relative to the cap body in a tightening direction, the second threaded portion is threadedly engaged with the first threaded portion, and the lid member is joined to the cap body to close the first spout, By rotating the lid member in the loosening direction relative to the cap body, the lid member is separated from the cap body to open the first spout, A stopper is provided on the cap body to limit the rotation of the lid member in the tightening direction, A limiting protrusion that can come into contact with the stopper in the tightening direction is provided on the cover member, The cap body is provided with a locking projection that prevents the lid member coupled to the cap body from rotating in the loosening direction, The loosening projection is disposed at a position spaced a predetermined distance from the stopper in the loosening direction, A locking space is formed between the locking projection and the stopper, The restricting projection abuts against the locking projection in both the tightening direction and the loosening direction, When the cover member is rotated in the tightening direction, the limiting projection can get over the loosening projection and enter the locking space, A cap device characterized in that, when the cover member is rotated in the loosening direction, the limiting projection can climb over the loosening projection and be released from the locking space.

2. a groove provided in the cap body and opening toward the tip of the first cylindrical member is formed around the base portion of the first cylindrical member; A stopper, a locking projection, and a locking space are provided inside the groove, 2. The cap device according to claim 1, wherein the restricting projection is capable of entering the locking space while being inserted into the groove.

3. A plurality of stoppers, locking projections, and locking spaces are arranged around the first cylindrical member at predetermined angular intervals in the circumferential direction, 2. The cap device according to claim 1, wherein a plurality of limiting projections are arranged on the cover member at predetermined angular intervals in the circumferential direction.

4. The cap body has a flange member that is attached to the container, The flange member is provided at the base end of the first cylindrical member, 4. The cap device according to claim 3, wherein the stopper, the locking projection and the locking space are provided on the flange member.

5. The locking projection has a first inclined surface inclined so as to retreat in the tightening direction and a second inclined surface inclined so as to retreat in the loosening direction, 2. The cap device according to claim 1, wherein the limiting projection abuts against the first inclined surface in the tightening direction and against the second inclined surface in the loosening direction.

6. 6. The capping device according to claim 5, wherein the first inclined surface is more gently inclined than the second inclined surface.

7. 2. The cap device according to claim 1, wherein the limiting projections are capable of abutting against the stoppers with their faces facing each other.

8. The lid member has a third cylindrical member, a second spout communicating with the inside of the second cylindrical member, and a lid body that opens and closes the second spout, 2. The cap device according to claim 1, wherein the second pouring outlet is formed inside the third cylindrical member.

9. a release member surrounded by a breakable weakened portion is provided inside the first cylindrical member; 2. The cap device according to claim 1, wherein the first pouring outlet communicates with the inside of the container when the weakened portion breaks and the detachment member is detached.

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