JP2017042344A - Lid for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid for a container, which can be easily opened/closed by reducing lid opening/closing torque without deteriorating sealability of the container.SOLUTION: A lid 40 for a container is screw-connected to a cylindrical port part 24 extended from the container 20. The lid 40 for the container includes an outer lid 41 which has a screw part 43 screw-connected to an outer peripheral surface of the cylindrical port part 24, and an inner lid 61 which is attached to the outer lid 41 in such a manner as to be rotatable and vertically unmovable out of a predetermined range and which has a seal material 71 for being crushed by an inner peripheral surface 29 of the cylindrical port part 24.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a container lid that is screw-coupled to a cylindrical mouth portion that extends from a sealed container in which fluid or the like is stored.

  Some containers that store fluid or the like seal the supply port so that the fluid or the like does not leak outside. In the case where the supply port is formed at the tip of the cylindrical mouth portion extending from the container, the container is sealed by covering the supply port with a sealing material. Various types of lids that seal the supply port formed in such a cylindrical mouth portion have been proposed (see, for example, Patent Document 1 (FIG. 1)).

The configuration of the lid disclosed in Patent Document 1 will be described with reference to FIG.
As shown in FIG. 8, a cylindrical mouth portion 101 extends from the container 100 in which the liquid is stored, and a supply port 102 is formed at the tip of the cylindrical mouth portion 101. The lid 103 includes a screw portion 105 that is screwed to the outer peripheral surface 104 of the cylindrical mouth portion 101 and a guide tube 107 that is guided along the inner peripheral surface 106 of the cylindrical mouth portion 101. An O-ring 109 is provided on the outer peripheral surface 108 of the guide cylinder 107, and the container 100 is sealed by pressing the O-ring 109 against the inner peripheral surface 106 of the cylindrical mouth portion 101. When the lid 103 is closed to the end, it is also sealed by the annular packing 112 between the upper end 110 of the cylindrical mouth portion 101 and the closing plate 111 of the lid 103.

  When the lid 103 is opened, the lid 103 rotates in the opening direction and rises. For this reason, a frictional force is applied to the O-ring 109 in a direction that prevents the movement of the lid 103. This force can be divided into a frictional force component in the rotation direction and a frictional force component in the downward direction. Further, since the annular packing 112 is pressed against the upper end 110 of the cylindrical mouth portion 101 for sealing, a frictional force in the rotational direction is also generated in the annular packing 112 at the start of opening the lid 103. As a result, the torque for opening the lid 103 increases.

  Similarly, when the lid 103 is closed, the O-ring 109 generates friction that can be expressed by a frictional force component in the rotational direction and a frictional force component in the upward direction. Furthermore, when the annular packing 112 is sealed while being pressed against the upper end 110 of the cylindrical mouth portion 101, a rotational frictional force is generated between the upper end 110 and the lid 103 being rotated and closed. As a result, the torque for closing the lid 103 also increases.

  However, it is preferable if the lid opening / closing torque can be reduced and the lid can be easily opened and closed.

JP-A-9-178161

  It is an object of the present invention to provide a lid for a container that can reduce the opening / closing torque of the lid and easily open / close it without impairing the hermeticity of the container.

A lid for a container screwed to a cylindrical mouth extending from the container,
The lid includes an outer lid having a threaded portion that is screw-coupled to the outer peripheral surface of the cylindrical mouth portion, and a sealing material that is crushed on the inner peripheral surface of the cylindrical mouth portion, and is rotatable on the outer lid and And an inner lid that is attached so as not to move up and down outside a predetermined range.

The inner lid is a lid plate that closes the opening of the cylindrical mouth portion, a flange portion that extends outward from the outer periphery of the lid plate, an inner protrusion that extends from the lid plate along the inner circumferential surface of the cylindrical mouth portion, An annular groove formed on the outer periphery of the inner protruding portion and fitted with a sealing material;
The outer lid includes a cylindrical outer tube portion in which a threaded portion is formed, an upper restricting portion that extends from the upper end of the outer tube portion toward the center and restricts the upward movement of the flange portion, and the upper restricting portion And a ring member that is provided on the inner side of the outer cylinder portion and restricts the downward movement of the flange portion.

The outer lid includes a metal first outer lid disposed on the inner side and a resin second outer lid disposed on the outer side of the first outer lid. The inner lid is made of resin. To do.

  The container stores the tooth surface cleaning powder.

  Since the lid includes an outer lid having a threaded portion that is screw-coupled to the outer peripheral surface of the cylindrical mouth portion, and an inner lid that is rotatably attached to the outer lid, when the outer lid is turned in the opening direction, the inner lid Only the outer lid starts to rotate without turning the lid. As the outer lid is raised, the inner lid is lifted by the outer lid without rotating, so that only the frictional force in the direction opposite to the upward direction is generated in the O-ring, and no frictional force in the rotational direction is generated. As a result, the torque for opening the lid can be reduced and the lid can be easily opened. Similarly, when the lid is closed, as the outer lid is lowered, the inner lid is not rotated but pushed down by the outer lid, so that only the frictional force in the direction opposite to the lowering direction is generated in the sealing material, and the friction in the rotational direction is generated. No force is generated. As a result, the torque for closing the lid can be reduced and the lid can be easily closed.

  Furthermore, since the flange portion of the inner lid is arranged between the upper restricting portion of the outer lid and the ring member, the inner lid can be attached to the outer lid with a simple structure so that it can rotate and move up and down within a predetermined range. Can do.

  Since the first outer lid that forms the inner side of the outer lid is made of metal and the inner lid is made of resin, the overall weight of the lid can be reduced compared to the case where the outer lid and the inner lid are made of metal. .

  The container stores powder for cleaning the tooth surface. Tooth surface cleaning powder has a higher frictional force than liquid, but in the present invention, the sealing material does not rotate and does not rotate, so the effect of the frictional force by the tooth surface cleaning powder is reduced as much as possible. Can do.

It is a perspective view of a tooth surface cleaning device carrying a container and a lid concerning the present invention. It is a section perspective view of a container and a lid. It is a disassembled perspective view of the lid | cover for containers. It is a bottom view of the lid | cover for containers. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is an enlarged view of 6 parts in FIG. 5. It is an effect | action figure of the lid | cover for containers. It is a figure explaining the basic principle of a prior art.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, in order to facilitate understanding of the present invention, a case where the container lid of the present invention is applied to a dental device is illustrated.

  As shown in FIG. 1, a powder / mixture gas generator (hereinafter referred to as a container) 20 and a lid 40 according to the present invention are mounted on a tooth surface cleaning device 10 as an example of a usage state. The tooth surface cleaning device 10 includes a box-shaped control unit 13 including a water tank 11 and a container 20, a first tube 14 extending from the control unit 13, and calculus removal connected to the tip of the first tube 14. Handpiece 15, second tube 16 extending from control unit 13, and tooth surface cleaning handpiece 17 connected to the tip of second tube 16.

  The calculus is peeled from the teeth and removed with water by ultrasonically vibrating the calculus removal handpiece 15 while receiving water from the water tank 11. Further, the tooth surface cleaning handpiece 17 receives supply of a mixed gas in which powder is mixed with gas from the container 20, and plays a role of ejecting the mixed gas to the tooth surface.

  The container 20 includes a box-shaped case 21 and a case base 22 that supports the case 21. The container 20 is made of resin, of which the case 21 and the container body 23 (see FIG. 2) are transparent. When the case 21 is made of colored resin, a transparent inspection window 20a is provided in front of the case 21, and the remaining amount of powder can be confirmed through the inspection window 20a. In the embodiment, the container 20 is made of resin. However, the container 20 is not limited to this and may be made of metal.

Hereinafter, the details of the container 20 will be described.
As shown in FIG. 2, the container 20 includes a container main body 23 having a hemispherical bottom, a cylindrical mouth portion 24 extending from the container main body 23, and a container shoulder portion 25 extending outward from the cylindrical mouth portion 24. And a gas ejection part 26 and a mixed gas discharge part 27 attached to the container main body 23. A male screw 28 is formed on the outer peripheral surface of the cylindrical mouth portion 24, and a lid 40 that covers the upper opening of the cylindrical mouth portion 24 is screwed to the male screw 28.

  The lid 40 has an outer lid 41 having a female screw (screw portion) 43 that is screw-coupled to the male screw 28 of the cylindrical mouth portion 24, and is attached to the outer lid 41 so as to be rotatable and not vertically movable outside a predetermined range. An inner lid 61 having a sealing material (hereinafter also referred to as an O-ring) 71 crushed by the inner peripheral surface 29 of the mouth 24 is provided. In the embodiment, the sealing material 71 is an O-ring. However, the present invention is not limited to this, and other general elastic members may be used as long as the space between the container 20 and the lid 40 can be sealed.

  The outer lid 41 includes a metal first outer lid 42 disposed on the inner side and a resin second outer lid 52 disposed on the outer side of the first outer lid 42. The inner lid 61 can be smoothly rotated with respect to the first outer lid 42. Furthermore, by making the second outer lid 52 made of resin, the outer shape can be easily formed, the appearance can be improved, and the component cost of the entire lid 40 can be reduced.

  By twisting the outer lid 41, the male screw 28 can be screwed into the female screw 43 provided on the first outer lid 42. The male screw 28 can be loosened from the female screw 43 by twisting (turning) in the opposite direction to the case of screwing. Even when the outer lid 41 is twisted to the end when closing the lid 40, the upper end 33 of the cylindrical mouth portion 24 does not contact the outer lid 41 or the inner lid 61. For this reason, even if the lid 40 is closed to the end, the upper end 33 of the cylindrical mouth portion 24 does not receive a downward force from the lid 40. As a result, when the lid 40 is closed, no frictional force is generated at the upper end 33 of the cylindrical mouth portion 24. Similarly, when the lid 40 is opened, no frictional force is generated at the upper end of the cylindrical mouth portion 24.

  In the embodiment, the lower end 44 of the outer lid 41 does not come into contact with the container shoulder 25 when the lid 40 is closed to the end. However, the present invention is not limited to this. It can be touched.

  The container body 23 includes a hemispherical shell portion 31 whose inner surface is a hemispherical surface 28 and a cylindrical portion 32 extending upward from the hemispherical shell portion 31. The hemispherical shell portion 31 and the cylindrical portion 32 are a continuous integral object.

  The container 20 has a chamber 34 having a space for storing tooth surface cleaning powder (hereinafter referred to as powder) (the chamber 34 is constituted by a container body 23 and a lid 40 in the embodiment). By ejecting gas from the gas ejection section 26, a circulating flow that circulates inside the chamber 34 is formed, and powder and gas are mixed to generate a mixed gas. A part of the mixed gas is discharged from the mixed gas discharge unit 27 to the outside. Since the space between the container main body 23 and the lid 40 is sealed by the sealing material 71, the powder does not leak outside the sealing material 71.

  As shown in FIG. 3, the lid 40 includes an outer lid 41 and an inner lid 61 assembled inside the outer lid 41. Specifically, the attachment portion 45 of the first outer lid 42 is fastened to the support portion 53 of the second outer lid 52 by the fastening member 54, and the inner lid 61 is assembled inside the first outer lid 42. An O-ring 71 is assembled on the outer periphery, and a ring member 72 that supports the inner lid 61 on the first outer lid 42 is assembled inside the first outer lid 42.

  A cutout 43 a is formed in the first outer lid 42. When screwing the lid 40 to the container 20 (see FIG. 2), the notch 43a determines the position where the female screw 43 of the lid 40 meshes with the male screw 28 of the container 20, and also determines the position when the lid 40 is closed to the end. .

  Of the four side surfaces 55a, 55b, 55c, 55d in the lateral direction of the second outer lid, one is the side surface 55a of the reference position, and the area of the plane portion is larger than the other three side surfaces 55b, 55c, 55d. . The side surface 55a at the reference position coincides with the case surface 21a at the reference position of the case 21 (see FIG. 1) by closing the lid 40 to the end. The case surface 21a at the reference position has a larger area in the plane portion than the other three case surfaces. Thus, it can be easily confirmed that the lid 40 is closed to the end by the side surface 55a of the reference position.

  As shown in FIGS. 2, 4, and 5, the inner lid 61 includes a lid plate 62 that closes the opening of the cylindrical mouth portion 24, a flange portion 63 that extends outward from the outer periphery of the lid plate 62, and a lid plate An inner protrusion 64 extending from 62 along the inner peripheral surface 29 of the cylindrical mouth portion 24 and an annular groove 65 into which an O-ring 71 formed on the outer periphery of the inner protrusion 64 is fitted.

  The first outer lid 42 has a cylindrical outer tube portion 46 in which the female screw 43 is formed, and an upper restricting portion 47 that extends from the upper end of the outer tube portion 46 toward the center and restricts the upward movement of the flange portion 63. And a ring member 72 provided on the inner side of the outer cylindrical portion 46 below the upper restricting portion 47 and restricting the downward movement of the flange portion 63. An opening 48 is formed inside the upper restricting portion 47. By the opening 48, the metal first outer lid 42 can be reduced in weight.

  As shown in FIG. 6, a holding groove portion 49 for holding the ring member 72 is formed on the inner periphery of the outer cylinder portion 46. When the claw 73 of the ring member 72 is fitted into the holding groove portion 49, the movement of the ring member 72 in the vertical direction with respect to the first outer lid 42 is restricted.

  The inner lid 61 is provided so as to be slightly movable in the lateral direction and the vertical direction with respect to the outer lid 41. A lateral gap 66 is formed between the inner periphery of the outer cylindrical portion 46 and the outer periphery of the flange portion 63. Since the inner lid 61 can move in the lateral direction relative to the outer lid 41 by the lateral gap 66, when the lid 40 is screwed into the cylindrical mouth portion 24, the inner lid 61 is inside the cylindrical mouth portion 24. It can be easily guided to the peripheral surface 29 side. Further, the inner lid 61 can be smoothly rotated with respect to the outer lid 41 by the lateral gap 66. Further, the lateral gap 66 allows the lid 40 to be appropriately opened and closed without depending on the positional relationship between the center of the inner lid 61 and the rotational axis of the outer lid 41.

  In a natural state, a vertical gap 67 is formed between the lower surface of the upper restricting portion 47 and the upper surface of the flange portion 63. The vertical gap 67 moves (is formed) between the lower surface of the flange portion 63 and the upper surface of the ring member 72 when the inner lid 61 moves to the upper regulating portion 47 side of the outer lid 41. For this reason, the inner lid 61 is attached to the outer lid 41 so as to be rotatable and not movable up and down outside a predetermined range. In other words, the inner lid 61 is attached to the outer lid 41 so as to be vertically movable within a predetermined range.

Next, the operation of the lid 40 for the container 20 described above will be described.
FIG. 7A shows a state where the lid 40 is closed. When the lid 40 is turned in the closing direction, the inner lid 61 descends along the inner peripheral surface 29 of the cylindrical mouth portion 24, and the O-ring 71 comes into contact with the inside of the upper end 33 of the cylindrical mouth portion 24. When the lid 40 is further rotated in the closing direction, the inner lid 61 does not rotate and only the outer lid 41 starts to rotate. As the outer lid 41 rotates, the outer lid 41 descends as shown by the arrow (1) with respect to the cylindrical mouth portion 24. The inner lid 61 does not rotate but rises relative to the outer lid 41 as indicated by the arrow (2) and is pushed down by the outer lid 61. Specifically, the inner lid 61 once descends with respect to the cylindrical mouth portion 24 and then descends again.

  At this time, a frictional force in the upward direction is generated in the O-ring 71. This frictional force is smaller than the prior art (the frictional force component in the upward direction + the frictional force component in the rotational direction). Therefore, the closing torque of the lid 40 can be reduced and the lid 40 can be easily closed.

  FIG. 7B shows the fully closed state of the lid 40. When the lid 40 is rotated in the opening direction from this state, the inner lid 61 does not rotate but only the outer lid 41 starts to rotate. As the outer lid 41 rotates, the outer lid 41 rises as indicated by an arrow (3) with respect to the cylindrical mouth portion 24. The inner lid 61 does not rotate and moves relative to the outer lid 41 as indicated by an arrow (4) because there is a vertical gap 67.

  If the lid 40 is sealed by pressing the inner side of the outer lid 41 against the upper end 33 of the cylindrical mouth portion 24 in the fully closed state, a downward force is generated at the upper end 33. The static friction force increases, and a frictional force in the rotational direction is also generated from the upper end 33 of the cylindrical mouth portion 24.

  In this regard, in the present invention, the inner lid 61 can be moved up and down within a predetermined range with respect to the outer lid 41 by the gap 67 in the vertical direction, so that the upper end 33 of the cylindrical mouth portion 24 receives a static friction force. There is no frictional force in the rotational direction from the upper end 33 of the cylindrical mouth portion 24. As a result, there is no frictional force in the rotational direction when the lid 40 is opened from the fully closed state, and the lid 40 can be easily opened.

  FIG. 7C shows a state where the lid 40 is opened. Further, when the outer lid 41 rotates, the outer lid 41 rises as shown by the arrow (5) with respect to the cylindrical mouth portion 24. Although the inner lid 61 does not rotate, it is lifted by the ring member 72 of the outer lid 41.

  At this time, a frictional force in the downward direction is generated in the O-ring 71. This frictional force is smaller than the prior art (the frictional force component in the downward direction + the frictional force component in the rotational direction). Therefore, the closing torque of the lid 40 can be reduced and the lid 40 can be easily opened.

In addition, although the lid | cover 40 for containers of this invention is suitable for the container 20 of the tooth surface cleaning apparatus 10, it does not interfere with providing to general sealed containers other than the container 20 of the tooth surface cleaning apparatus 10.
In the present invention, the sealing material 71 is provided on the lid 40, but the present invention is not limited to this, and the sealing material 71 may be provided on the container 20.

About the lid | cover 40 for containers of this invention which has been mentioned above, the description from a different viewpoint is described below. As described above, the container lid 40 of the present invention supports the inner lid 61 that closes the cylindrical mouth portion 24 of the container 20 that stores the contents, and the opening and closing of the cylindrical mouth portion 24 by the inner lid 61. An outer lid 41 is provided. The cylindrical mouth portion 24 of the container 20 has a cylindrical shape having an inner side surface, and the inner lid 61 includes a lid plate side surface facing the inner side surface. Further, the inner lid 61 includes a sealing material 71 that contacts the inner side surface of the cylindrical mouth portion 24. The sealing material 71 is disposed on the side of the lid plate of the inner lid 61.
The inner lid 61 descends and rises with respect to the container 20 when the cylindrical mouth portion 24 of the container 20 is opened vertically upward. The outer lid 41 includes a first flat surface 47 a that lowers the inner lid 61 with respect to the cylindrical mouth portion 24. Further, the outer lid 41 includes a second flat surface 72 a that raises the inner lid 61 with respect to the cylindrical mouth portion 24.
In the present invention, the friction coefficient between the first plane 47a and the inner lid 61 is lower than the friction coefficient between the wall side surface and the sealing material 71, and the friction coefficient between the second plane 72a and the inner lid 61 is also the wall. The friction coefficient between the side surface and the sealing material 71 is lower. Thereby, the burden on the user when opening and closing the lid can be reduced.

  More specifically, the outer lid 41 includes an inner side surface on the outer lid side that faces an outer wall of the cylindrical mouth portion 24 (hereinafter referred to as an outer periphery of the opening). A container side screw (male screw) 28 is provided on the outer periphery of the opening. Further, the inner side surface on the outer lid side includes a lid side screw (female screw) 43 corresponding to the container side screw 28. The outer lid 41 rotates according to the guidance of the container side screw 28 and the lid side screw 43. At this time, the sealing material 71 suppresses the rotation of the inner lid 61 based on the friction between the cylindrical mouth portion 24 and the inner side surface. The first flat surface 47 a or the second flat surface 72 a allows the outer lid 41 and the inner lid 61 to slide. As a result, the load caused by the frictional force in the direction opposite to the rotational direction is alleviated, and the burden on the user when opening and closing the lid 40 is reduced.

The outer lid 41 includes a cylindrical outer cylinder portion 46, an upper regulating portion 47, and a ring member 72. The upper restricting portion 47 is disposed inside the outer cylinder portion 46 and includes a first flat surface 47 a that contacts the inner lid 61. The ring member 72 is configured inside the outer cylinder portion 46 separately from the upper restricting portion 47. The ring member 72 includes a second flat surface 72 a that contacts the inner lid 61.
The inner lid 61 includes a flange portion 63 that is sandwiched between the upper restricting portion 47 and the ring member 72. The thickness of the flange portion 63 is smaller than the distance between the upper restricting portion 47 and the ring member 72.

  The lid side surface of the inner lid 61 is configured as an inner protrusion 64 that can hold the sealing material 71. The inner projecting portion 64 is provided continuously from the flange portion 63. The wall constituting the cylindrical mouth portion 24 has a cylindrical shape having an inner diameter. The outer diameter of the annular sealing material 71 is larger than the inner diameter of the cylindrical mouth portion 24.

  Further, the diameter of the flange portion 63 of the inner lid 61 (hereinafter referred to as a bowl-shaped outer diameter) is smaller than the minimum inner diameter of the outer cylinder portion 46 of the outer lid 41, and the radial movement of the inner lid 61 is performed. Allow. Further, the upper restricting portion 47 has a first inner diameter, and similarly, the ring member 72 has a second inner diameter. At this time, the outer diameter of the bowl-shaped portion is larger than the first inner diameter or the second inner diameter. Naturally, the diameter of the inner protrusion 64 of the inner lid 61 is smaller than the first inner diameter or the second inner diameter.

  In the above-described embodiment, the present invention has been described by exemplifying a configuration in which the inner lid 61 includes the flange portion 63. The present invention is not limited to such a configuration. For example, the structure which arrange | positions the annular part corresponding to the flange part 63 inside the outer cylinder part 46 of the outer cover 41 may be sufficient. In this case, the annular portion includes the first plane 47a and the second plane 72a. Further, the inner lid 61 is provided with a groove-like portion corresponding to the upper restricting portion 47 and the ring member 72.

DESCRIPTION OF SYMBOLS 20 ... Container 23 ... Container main body 24 ... Cylindrical mouth part 28 ... Male screw 29 ... Inner peripheral surface 40 ... Cover 41 ... Outer cover 42 ... 1st outer cover 43 ... Screw part (female screw)
46 ... Outer cylinder portion 47 ... Upper regulating portion 52 ... Second outer lid 61 ... Inner lid 62 ... Lid plate 63 ... Flange portion 64 ... Inner protrusion 65 ... Annular groove 71 ... Sealing material (O-ring)
72. Ring member

Claims (4)

A lid for a container screwed to a cylindrical mouth extending from the container,
The lid includes an outer lid having a threaded portion that is screw-coupled to the outer peripheral surface of the cylindrical mouth portion, and a sealing material that is crushed on the inner peripheral surface of the cylindrical mouth portion, and is rotatable on the outer lid and A container lid characterized by comprising an inner lid that is attached so as not to move up and down outside a predetermined range. The inner lid includes a lid plate that closes the opening of the cylindrical mouth portion, a flange portion that extends outward from the outer periphery of the lid plate, and an inner surface that extends from the lid plate along the inner circumferential surface of the cylindrical mouth portion. A protrusion and an annular groove formed on the outer periphery of the inner protrusion and into which the sealing material is fitted;
The outer lid includes a cylindrical outer cylinder portion in which the screw portion is formed, an upper restriction portion that extends from the upper end of the outer cylinder portion toward the center and restricts the upward movement of the flange portion, and an upper portion thereof The container lid according to claim 1, further comprising a ring member provided inside the outer tube portion below the restricting portion and restricting the downward movement of the flange portion. The outer lid includes a metal first outer lid arranged on the inner side and a resin second outer lid arranged on the outer side of the first outer lid. The inner lid is made of resin. 3. The container lid according to claim 1 or 2, characterized in that   The said container stores the powder for tooth surface cleaning, The lid | cover for containers of any one of Claims 1-3 characterized by the above-mentioned.

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